阅读说明：本技术 一种曲轴、曲轴的加工工艺及转子式压缩机 (Crankshaft, crankshaft machining process and rotor type compressor ) 是由 郑贺 庄泉 夏祖伟 于建芝 于 2021-01-09 设计创作，主要内容包括：本申请涉及一种曲轴,属于压缩机技术领域。其从上到下依次包括上轴承部、偏心部和下轴承部,曲轴表面涂覆有涂层薄膜,涂层薄膜包括单质铬薄膜粘结层、单质铬薄膜过渡层、铬的硬质碳化物过渡层和类金刚石碳膜层,本申请还公开了上述曲轴的加工工艺,包括下述步骤：1)、压缩机曲轴由钢材用冷镦机一次性镦出；2)、涂层表面强化处理；2.1)、清洗基体；2.2)、沉积线性离子源辅助沉积的单质铬薄膜粘结层；2.3)、沉积金属单质薄膜过渡层；2.4)、沉积铬的硬质碳化物薄膜过渡层；2.5)、沉积类金刚石碳膜层；2.6)、取出曲轴基体。本申请还公开了一种转子式压缩机,使用了上述曲轴。本申请具有曲轴耐磨性更好的效果。(The application relates to a crankshaft, and belongs to the technical field of compressors. The crankshaft comprises an upper bearing part, an eccentric part and a lower bearing part from top to bottom in sequence, wherein a coating film is coated on the surface of the crankshaft and comprises an elemental chromium film bonding layer, an elemental chromium film transition layer, a chromium hard carbide transition layer and a diamond-like carbon film layer, and the application also discloses a processing technology of the crankshaft, which comprises the following steps: 1) the crankshaft of the compressor is upset out of steel at one time by a cold header; 2) strengthening the surface of the coating; 2.1), cleaning the substrate; 2.2) depositing a simple substance chromium film bonding layer deposited by the assistance of a linear ion source; 2.3) depositing a metal simple substance film transition layer; 2.4) depositing a hard carbide film transition layer of chromium; 2.5) depositing a diamond-like carbon film layer; 2.6) and taking out the crankshaft base body. The application also discloses a rotor compressor, which uses the crankshaft. This application has the better effect of bent axle wearability.)

1. A crankshaft, characterized by: the crankshaft comprises an upper bearing part (11), an eccentric part (12) and a lower bearing part (13) from top to bottom in sequence, wherein a coating film (14) is coated on the surface of the crankshaft (1), and the coating film (14) comprises a simple substance chromium film bonding layer (141), a simple substance chromium film transition layer (142), a chromium hard carbide transition layer (143) and a diamond-like carbon film layer (144).

2. A crankshaft according to claim 1, wherein: the outer walls of the upper bearing part (11), the eccentric part (12) and the lower bearing part (13) are coated with the coating film (14).

3. A crankshaft according to claim 1, wherein: the outer walls of the lower bearing portion (13) and the eccentric portion (12) are coated with the coating film (14).

4. A crankshaft according to claim 1, wherein: the outer wall of the eccentric part (12) is coated with the coating film (14).

5. A processing technology of a crankshaft is characterized in that: the method comprises the following steps:

1) the crankshaft of the compressor is upset out of steel at one time by a cold header;

1.1) cutting a cold heading steel cylinder with a proper length according to the required specification;

1.2) upsetting the cold heading steel cylinder into a primary upset body which is consistent with the shape of the crankshaft of the compressor and is larger than the shape of the crankshaft of the compressor through cold heading;

1.3) upsetting the preliminary upset body by cold upsetting to obtain an intermediate upset body with the shape and size close to those of the compressor crankshaft;

1.4) cold heading the intermediate heading body to obtain a blank meeting the size requirement of the compressor crankshaft;

1.5) finishing the blank to obtain a crankshaft part;

2) coating a film on the surface of a crankshaft part by adopting a sputtering coating process, wherein the surface of the crankshaft to be strengthened is coated, and the film coating equipment comprises a vacuum chamber and a workpiece bracket which is arranged in the vacuum chamber and can simultaneously revolve and rotate;

2.1), cleaning the matrix: fixing the pretreated crankshaft substrate on a workpiece bracket, and adjusting the air pressure of the vacuum chamber to 1 × 10^-5～5×10^-5Torr, introducing argon, starting a linear ion source, wherein the working current of the linear ion source is 0.1-1A, the power is 100-1000W, the negative bias of a crankshaft substrate is adjusted to be 0-300V, and the working time is 10-40 minutes;

2.2) depositing a simple substance chromium film bonding layer deposited by assistance of a linear ion source: adjusting the negative bias voltage of a crankshaft substrate to be 50-500V, keeping the opening state of the linear ion source, adjusting the working current of the linear ion source to be 0.1-1A, continuously introducing argon, simultaneously opening a magnetron sputtering source, adjusting the working current of the magnetron sputtering source to be 1-5A, introducing argon for 5-30 minutes, and then closing the linear ion source;

2.3) depositing a metal simple substance film transition layer: adjusting the negative bias voltage of a crankshaft substrate to 50-500V, keeping the opening state of a magnetron sputtering source, adjusting the working current of the magnetron sputtering source to 1-5A, introducing argon gas, and working for 5-30 minutes;

2.4), depositing a hard carbide film transition layer of chromium: keeping the working condition in the step 2.4) unchanged, starting the linear ion source, and adjusting the working current of the linear ion source to be 0.1-0.5A: simultaneously introducing acetylene gas for 5-30 min, and then closing the magnetron sputtering source;

2.5), depositing a diamond-like carbon film layer: adjusting the working current of the linear ion source to be 0.1-0.5A, the power to be 100-1000W, adjusting the negative bias of the crankshaft substrate to be 50-500V, and introducing acetylene gas for 60-500 minutes;

2.6), taking out the crankshaft base body: and taking out the crankshaft substrate when the temperature of the vacuum chamber is reduced to room temperature.

6. The machining process of a crankshaft as claimed in claim 5, wherein: the workpiece bracket in the step 2.1) comprises a chassis (51), a mounting column (52) and a mounting piece (53), a plurality of mounting columns (52) are arranged, a plurality of mounting columns (52) are arranged at intervals along the circumferential direction of the chassis (51), the mounting part (53) comprises a middle rod (531), an upper limiting piece (532) and a lower limiting piece (533) which are detachably connected, the upper stopper (532) includes an upper stopper piece (5321), the lower stopper (533) includes a lower stopper piece (5331), the upper limit sheet (5321) and the lower limit sheet (5331) are respectively arranged at two ends of the middle rod (531), the opposite side walls of the upper limiting sheet (5321) and the lower limiting sheet (5331) are respectively provided with an upper limiting convex column (5323) and a lower limiting convex column (5333), both ends of the crankshaft (1) are respectively provided with a limiting jack, the upper limiting convex columns (5323) and the lower limiting convex columns (5333) are correspondingly positioned in the two limiting insertion holes one by one;

the mounting pieces (53) are detachably mounted on the mounting columns (52), the mounting pieces (53) on each mounting column (52) are multiple, the mounting pieces (53) are arranged along the circumferential direction of the mounting columns (52) at intervals, the chassis (51) rotates to drive the mounting columns (52) to revolve, and the mounting columns (52) rotate.

7. The process of claim 6, wherein: the upper limiting piece (532) further comprises an upper connecting column (5322), the lower limiting piece (533) further comprises a lower connecting column (5332), and the upper connecting column (5322) and the lower connecting column (5332) are respectively arranged on two sides of the middle rod (531);

the lateral wall of erection column (52) is provided with installation arch (521), the confession has been seted up in installation arch (521) spout (522) that installed part (53) slided the installation, first spacing spout (523) have been seted up to spout (522) cell wall in opposite directions, intermediate lever (531) orientation second spacing spout (5311) have been seted up to the both sides wall of first spacing spout (523), go up spliced pole (5322) both sides one-to-one slide install in setting up in opposite directions first spacing spout (523) with in the spacing spout of second (5311), lower spliced pole (5332) both sides one-to-one slide install in setting up in opposite directions first spacing spout (523) with in the spacing spout of second (5311).

8. The process of claim 7, wherein: the chassis (51) rotates under the driving of a driving system, the driving system comprises a motor (32), balls (62), a gear ring (64), a planet wheel (65), a sun wheel (66) and an input gear (67), a plurality of rolling grooves (8) are formed in the bottom of the vacuum chamber (4), the balls (62) are arranged in the rolling grooves (8) in a one-to-one correspondence mode, the sun wheel (66) and the chassis (51) are coaxial and are fixed to the bottom of the vacuum chamber (4), the gear ring (64) is located between the chassis (51) and the balls (62), the planet wheel (65) is arranged between the sun wheel (66) and the gear ring (64), the planet wheel (65) is meshed with the sun wheel (66) and the gear ring (64), and the gear ring (64) is provided with external teeth and is meshed with the input gear (67), the input gear (67) is installed on an output shaft of the motor (32), a penetrating hole (5113) is formed in the chassis (51), the mounting columns (52) penetrate through the penetrating hole (5113), and the plurality of planet wheels (65) are installed on the plurality of mounting columns (52) in a one-to-one correspondence mode and drive the mounting columns (52) to move together.

9. The process of claim 8, wherein: the chassis (51) comprises a clamping piece (511) and a filling piece (512), the clamping piece (511) and the filling piece (512) are provided with a plurality of clamping pieces (511) and a plurality of filling pieces (512) which are fan-shaped and alternately arranged, the clamping pieces (511) correspond to a plurality of mounting columns (52), the penetrating hole (5113) is formed in the clamping piece (511), the clamping piece (511) consists of two clamping plates (5111), the clamping plate (5111) is provided with a half hole (5112), when the clamping piece (511) consists of the two clamping plates (5111), the penetrating hole (5113) consists of the two half holes (5112), the clamping piece (511) is close to two adjacent filling pieces (512), two limiting grooves (5114) are formed on two sides of the two adjacent clamping pieces (511), and two limiting strips (5121) are arranged on two sides of the two adjacent clamping pieces (511), the limiting strip (5121) is slidably mounted in the limiting groove (5114).

10. A rotor type compressor characterized in that: the compressor comprises a piston (31), a shell (2), a motor (32), an upper cylinder cover (33), a lower cylinder cover (346), a cylinder (34), a sliding sheet (36), a liquid storage device (37) and the crankshaft (1) of any one of claims 1 to 4, wherein the motor (32) is arranged in the shell (2) and drives the crankshaft (1) to rotate, the cylinder (34) is fixed in the shell (2), the upper cylinder cover (33) and the lower cylinder cover (346) are respectively arranged above and below the cylinder (34) and form a compression space (341) for compressing a refrigerant, an air suction port (342) and an air suction pipe (373) are arranged on the cylinder (34), an exhaust hole (333) and a one-way exhaust valve (334) are arranged on the upper cylinder cover (33), the cylinder (34) and the lower cylinder cover (346) are sequentially penetrated by the crankshaft (1), the eccentric part (12) of the crankshaft (1) is positioned in the compression space (341) and sleeved with the piston (31), and the liquid accumulator (37) is arranged on one side of the shell (2) and communicated with the air suction pipe (373);

the shell (2) comprises a shell body (21) which is through up and down, and a top cover (22) and a bottom cover (23) which are positioned on the shell body (21) and close the shell body (21) up and down;

an installation groove (343) is formed in the inner wall of the cylinder (34), the sliding piece (36) is partially located in the installation groove (343), one end of the sliding piece (36) is located in the compression space (341) and abutted against the piston (31), a spring hole (344) communicated with the bottom of the installation groove (343) is further formed in the cylinder (34), the spring hole (344) is horizontally formed and penetrates through the outer wall of the cylinder (34), a spring (345) is installed in the spring hole (344), the spring (345) is clamped between the sliding piece (36) and the inner wall of the machine shell (2), a locking hole (347) penetrating through the spring hole (344) is further vertically formed in the cylinder (34), a locking block (35) is installed in the part, located above the spring hole (344), of the locking hole (347) in a sliding mode, and a limiting block (351) is arranged on the side wall, facing the spring (345), of the locking block (35), the two limit blocks (351) are arranged, the two limit blocks (351) are arranged at intervals along the length direction of the spring hole (344), the lower cylinder cover (346) is provided with a butt joint block (3462) which is abutted to the locking block (35) and prevents the locking block (35) from falling, the butt joint block (3462) is located below the spring hole (344), a butt joint bulge (3463) is arranged on the butt joint block (3462), the number of the butt joint bulges (3463) is two, and the two butt joint bulges (3463) penetrate through the spring hole (344) and are abutted to the locking block (35) and are respectively arranged on two sides of the spring (345).

Technical Field

The application relates to the field of compressors, in particular to a crankshaft, a rotor type compressor and a crankshaft machining process.

Background

The air conditioner compressor which is most widely applied in the current market belongs to a rotor type air conditioner compressor. The motor does not need to convert the rotary motion of the rotor into the reciprocating motion of the piston, but directly drives the rotary crankshaft to rotate to complete the compression of the refrigerant.

The crankshaft is used as one of important parts of the rotor compressor, in the process of compressing a refrigerant, the outer diameter surface of the eccentric part of the crankshaft is tightly attached to the inner wall surface of the piston to drive the crankshaft to rotate, the inner diameter surface of the piston is in friction with the eccentric part of the crankshaft, the crankshaft needs to bear the friction between torsional force and the piston during operation, and the working condition is severe.

Meanwhile, with the improvement of national requirements on environmental protection, the refrigerant adopted by the rotary compressor is continuously developed towards the direction of green environmental protection. High efficiency, energy conservation and consumption reduction also become targets of the compressor industry. Therefore, higher demands are placed on the compressor parts.

In view of the above-mentioned related art, the inventors have recognized a need for improving the surface hardness of a crankshaft in some way to improve the wear resistance of the crankshaft.

Disclosure of Invention

In order to improve the wear resistance of the crankshaft, the application provides a crankshaft, which adopts the following technical scheme:

the crankshaft sequentially comprises an upper bearing part, an eccentric part and a lower bearing part from top to bottom, wherein a coating film is coated on the surface of the crankshaft, and the coating film comprises an elemental chromium film bonding layer, an elemental chromium film transition layer, a chromium hard carbide transition layer and a diamond-like carbon film layer.

By adopting the technical scheme, the surface of the crankshaft is strengthened by coating the coating film on the surface of the crankshaft to obtain higher surface hardness, the wear resistance and the self-lubricating property of the crankshaft are improved, the surface roughness of the crankshaft is reduced, the excellent performance of the crankshaft under the severe working condition inside the compressor is obtained, the conditions that the crankshaft is not easy to generate in the compressor due to torsion failure and the internal mechanism of the rotary compressor is stuck to cause failure are avoided, the service life and the work-doing energy efficiency of the compressor are prolonged by reducing the friction force between the surface of the crankshaft and other parts, the coating can be supplemented according to the original production process, and the batch production is easy to realize.

Optionally, the outer wall of the upper bearing portion, the outer wall of the eccentric portion, and the outer wall of the lower bearing portion are coated with the coating film.

Optionally, the outer wall of the lower bearing portion and the outer wall of the eccentric portion are coated with the coating film.

Optionally, the outer wall of the eccentric part is coated with the coating film.

By adopting the technical scheme, the coating form of the coating film can be changed as required, full coating and half coating are selected according to requirements, and the cost is favorably controlled while excellent performance is kept.

In a second aspect, the present application provides a crankshaft machining process for machining the crankshaft, which adopts the following technical solutions:

a crankshaft machining process comprises the following steps:

1) the crankshaft of the compressor is upset out of steel at one time by a cold header;

1.1) cutting a cold heading steel cylinder with a proper length according to the required specification;

1.2) upsetting the cold heading steel cylinder into a primary upset body which is consistent with the shape of the crankshaft of the compressor and is larger than the shape of the crankshaft of the compressor through cold heading;

1.3) upsetting the preliminary upset body by cold upsetting to obtain an intermediate upset body with the shape and size close to those of the compressor crankshaft;

1.4) cold heading the intermediate heading body to obtain a blank meeting the size requirement of the compressor crankshaft;

1.5) finishing the blank to obtain a crankshaft part;

2) coating a film on the surface of a crankshaft part by adopting a sputtering coating process, wherein the surface of the crankshaft to be strengthened is coated, and the film coating equipment comprises a vacuum chamber and a workpiece bracket which is arranged in the vacuum chamber and can simultaneously revolve and rotate;

2.1), cleaning the matrix: fixing the pretreated crankshaft substrate on a workpiece bracket, and adjusting the air pressure of the vacuum chamber to 1 × 10^-5～5×10^-5Torr, introducing argon, starting a linear ion source, wherein the working current of the linear ion source is 0.1-1A, the power is 100-1000W, the negative bias of a crankshaft substrate is adjusted to be 0-300V, and the working time is 10-40 minutes;

2.2) depositing a simple substance chromium film bonding layer deposited by assistance of a linear ion source: adjusting the negative bias voltage of a crankshaft substrate to be 50-500V, keeping the opening state of the linear ion source, adjusting the working current of the linear ion source to be 0.1-1A, continuously introducing argon, simultaneously opening a magnetron sputtering source, adjusting the working current of the magnetron sputtering source to be 1-5A, introducing argon for 5-30 minutes, and then closing the linear ion source;

2.3) depositing a metal simple substance film transition layer: adjusting the negative bias voltage of a crankshaft substrate to 50-500V, keeping the opening state of a magnetron sputtering source, adjusting the working current of the magnetron sputtering source to 1-5A, introducing argon gas, and working for 5-30 minutes;

2.4), depositing a hard carbide film transition layer of chromium: keeping the working condition in the step 2.4) unchanged, starting the linear ion source, and adjusting the working current of the linear ion source to be 0.1-0.5A: simultaneously introducing acetylene gas for 5-30 min, and then closing the magnetron sputtering source;

2.5), depositing a diamond-like carbon film layer: adjusting the working current of the linear ion source to be 0.1-0.5A, the power to be 100-1000W, adjusting the negative bias of the crankshaft substrate to be 50-500V, and introducing acetylene gas for 60-500 minutes;

2.6), taking out the crankshaft base body: and taking out the crankshaft substrate when the temperature of the vacuum chamber is reduced to room temperature.

Optionally, the workpiece bracket in step 2.1) includes a chassis, a plurality of mounting columns and a plurality of mounting pieces, the plurality of mounting columns are circumferentially arranged at intervals along the chassis, each mounting piece includes a middle rod, an upper limiting piece and a lower limiting piece, the middle rods are detachably connected with each other, each upper limiting piece includes an upper limiting piece, each lower limiting piece includes a lower limiting piece, the upper limiting piece and the lower limiting piece are respectively arranged at two ends of the middle rod, opposite side walls of the upper limiting piece and the lower limiting piece are respectively provided with an upper limiting convex column and a lower limiting convex column, two ends of the crankshaft are respectively provided with a limiting jack, and the upper limiting convex columns and the lower limiting convex columns are correspondingly located in the two limiting jacks;

the mounting pieces are detachably mounted on the mounting columns, the mounting pieces on the mounting columns are multiple, the mounting pieces are arranged along the circumferential direction of the mounting columns at intervals, the chassis rotates to drive the mounting columns to revolve, and the mounting columns rotate.

By adopting the technical scheme, the installation columns are arranged for arranging the crankshaft to carry out coating surface strengthening treatment, the installation columns drive the crankshaft on the installation columns to revolve along with the circumferential revolution of the chassis, the crankshaft is driven to rotate around the installation columns by the rotation of the installation columns, so that the surfaces of the crankshaft in all directions can be better subjected to coating surface strengthening treatment, the installation piece is used for adapting to the shape of the crankshaft, the crankshaft is installed on the installation columns to carry out coating surface strengthening treatment, the crankshaft is limited in the axial direction by the matching of the upper limiting piece and the lower limiting piece, the crankshaft is fixed between the upper limiting piece and the lower limiting piece, the upper limiting convex column and the lower limiting convex column on the upper limiting piece and the lower limiting piece are inserted into the limiting insertion hole on the crankshaft, the crankshaft is fixed and prevented from falling off while the coating surface strengthening treatment of the crankshaft is not influenced, and after the installation piece is installed, the installation piece is installed on the installation column, the crankshafts are convenient to place, and a plurality of crankshafts can be installed on one installation column to simultaneously perform coating surface strengthening treatment.

Optionally, the upper limiting piece further comprises an upper connecting column, the lower limiting piece further comprises a lower connecting column, and the upper connecting column and the lower connecting column are respectively arranged on two sides of the middle rod;

the lateral wall of erection column is provided with the installation arch, the supply is seted up to the installation arch the spout of installed part installation of sliding, first spacing spout has been seted up to the cell wall that the spout is in the opposite direction, the intermediate lever orientation the spacing spout of second has been seted up to the both sides wall of first spacing spout, go up the spliced pole both sides one-to-one slide install in set up in opposite directions first spacing spout with in the spacing spout of second, down spliced pole both sides one-to-one slide install in set up in opposite directions first spacing spout with in the spacing spout of second.

Through adopting the above-mentioned technical scheme, the erection column supplies the installed part installation through setting up the installation arch, the installed part slides through last spliced pole and lower spliced pole and installs in first spacing inslot, thereby install the installed part on the erection column, go up spliced pole and lower spliced pole simultaneously and form the installed part through assembling with the intermediate lever, when making things convenient for the installation of bent axle, spliced pole and lower spliced pole break away from first spacing inslot through the intermediate lever restriction, thereby the separation of restriction bent axle, go up spliced pole and lower spliced pole again through installing in the spacing inslot of second restriction intermediate lever and break away from the erection column, the whole equipment of installed part forms and accomplishes fixedly again with the protruding cooperation of installation, simple structure is effective adaptation bent axle again, convenient and fast is dismantled in the installation.

Optionally, the chassis rotates under the driving of a driving system, the driving system comprises a motor, a ball, a gear ring, a planet wheel, a sun wheel and an input gear, the bottom of the vacuum chamber is provided with a plurality of rolling grooves, a plurality of rolling balls are arranged in the rolling grooves in a one-to-one correspondence manner, the sun wheel and the chassis are coaxial and are fixed at the bottom of the vacuum chamber, the gear ring is positioned between the chassis and the balls, a plurality of planet wheels are positioned between the sun wheel and the gear ring, and the planet gear is meshed with both the sun gear and the gear ring, the gear ring is provided with external teeth and is meshed with the input gear, the input gear is arranged on an output shaft of the motor, the chassis is provided with a through hole, the mounting column is arranged in the through hole in a penetrating way, and the planet wheels are correspondingly arranged on the mounting columns one by one and drive the mounting columns to move together.

Through adopting above-mentioned technical scheme, it is rotatory to drive input gear through the motor, it is rotatory to drive the ring gear through the gear, because the sun gear keeps motionless, the rotation of ring gear drives planet wheel rotation and revolves around the sun gear, it revolves to drive the erection column through the revolution of planet wheel, the rotation through the planet wheel drives the erection column rotation, chassis at this moment is used for restricting the erection column, make the erection column keep vertical when revolution and rotation, it is more steady to make the planet wheel be difficult to block the operation, the ball that real empty room bottom set up is used for supporting planet wheel and ring gear, make ring gear and planet wheel moving more stable and less with real empty room between the frictional force, reduce the consumption.

Optionally, the chassis includes holder and packing, the holder with the packing all is provided with a plurality ofly, and is a plurality of holder and a plurality of the packing is fan-shaped and sets up in turn, and is a plurality of the holder corresponds a plurality of the erection column, it sets up to wear the hole the holder, the holder comprises two splint, half hole has been seted up to splint, works as two splint are constituteed during the holder, two half hole is constituteed wear the hole, the holder is close to adjacent two spacing groove has been seted up to the both sides of packing, the packing is close to adjacent two the both sides of holder are provided with two spacing, spacing slide install in spacing inslot.

Through adopting above-mentioned technical scheme, the chassis mainly receives the support of planet wheel and remains stable, then stabilize the erection column through the chassis, the chassis adopts the mode that holder and filling member components of a whole that can function independently were assembled, make chassis simple to operate, the holder carries out the mode equipment of centre gripping to the erection column through two splint, then keep away from each other through filling member restriction splint, thereby maintain the centre gripping stabilizing effect to the erection column, filling member and holder are fixed a position the installation through the cooperation of spacing and spacing groove again, make the chassis of equipment completion difficult to disintegrate.

In order to prolong the service life of the rotor compressor and reduce the power consumption, the application provides a rotor compressor, which adopts the following technical scheme:

a rotor compressor comprises a piston, a shell, a motor, an upper cylinder cover, a lower cylinder cover, a cylinder, a slip sheet, a liquid storage device and a crankshaft, wherein the motor is arranged in the shell and drives the crankshaft to rotate;

the shell comprises a shell body which is communicated up and down, and a top cover and a bottom cover which are positioned on the shell body and close the shell body up and down;

the inner wall of the cylinder is provided with a mounting groove, the sliding piece is partially positioned in the mounting groove, one end of the sliding piece is positioned in the compression space and is abutted against the piston, the cylinder is further provided with a spring hole communicated with the bottom of the mounting groove, the spring hole is horizontally arranged and penetrates through the outer wall of the cylinder, a spring is arranged in the spring hole and is clamped between the sliding piece and the inner wall of the casing, the cylinder is further vertically provided with a locking hole communicated with the spring hole, a locking block is arranged in the part, above the spring hole, of the locking hole in a sliding manner and is provided with a locking block, the side wall of the locking block, facing the spring, is provided with two limiting blocks, the two limiting blocks are arranged at intervals along the length direction of the spring hole, the lower cylinder cover is provided with an abutting block abutting against the locking block and preventing the locking block from falling down, and the abutting block is positioned below, the butt joint block is provided with a butt joint protrusion, the butt joint protrusion has two, and the butt joint protrusion passes the spring hole butt joint the locking block just establishes separately the both sides of spring.

By adopting the technical scheme, because the surface of the crankshaft is coated with a layer of coating film, the eccentric part of the crankshaft which drives the piston to move is taken as an important working surface when the compressor works, the eccentric part is coated with the coating film to obtain higher surface hardness, the wear resistance and the self-lubricating property are improved, the surface roughness of the crankshaft is reduced, the working efficiency of the compressor is higher, the power consumption is reduced, the service life is prolonged, the sliding sheet is always kept in contact with the piston under the spring force action of the spring, the compression space between the piston and the cylinder wall is divided into two parts, under the rotation of the crankshaft, the two parts of the divided area of the compression space are subjected to the processes of expansion and reduction repeatedly, the whole set of processes of air suction, compression and exhaust is carried out, and.

Insert the locking hole through the butt piece of lower cylinder head, the protruding jack-up locking piece of butt on the butt piece to relieve the suppression effect of locking piece to the spring, spring one end and shell body inner wall butt, the spring other end promotes gleitbretter butt piston, is difficult to receive the influence of spring and gleitbretter when making the cylinder installation, and it is more convenient to install, in the same direction as the liberation of taking completion spring when cylinder head under the installation, and two effects are accomplished in an action.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the coating film is coated on the surface of the crankshaft to strengthen the surface of the crankshaft so as to obtain higher surface hardness, improve the wear resistance and self-lubrication of the crankshaft and reduce the surface roughness of the crankshaft so as to obtain excellent performance of the crankshaft under the severe working condition in a compressor, so that the conditions of torsion failure of the crankshaft in the compressor and failure due to blocking of an internal mechanism of the rotary compressor are not easy to occur, the friction between the surface of the crankshaft and other parts is reduced, the service life and work efficiency of the compressor are prolonged, the coating can be supplemented according to the original production process, the batch production is easy to realize, the coating form of the coating film can be changed according to needs, full coating and half coating are selected according to needs, the excellent performance is maintained, and meanwhile, the cost is favorably controlled;

2. the installation pieces are used for being matched with the shapes of the crankshafts, the crankshafts are installed on the installation columns to be subjected to coating surface strengthening treatment, after the crankshafts are installed on the installation pieces, the installation pieces are installed on the installation columns, the crankshafts are convenient to place, and a plurality of crankshafts can be installed on one installation column to be subjected to coating surface strengthening treatment;

3. insert the locking hole through the butt piece of lower cylinder head, the protruding jack-up locking piece of butt on the butt piece to relieve the suppression effect of locking piece to the spring, spring one end and shell body inner wall butt, the spring other end promotes gleitbretter butt piston, is difficult to receive the influence of spring and gleitbretter when making the cylinder installation, and it is more convenient to install, in the same direction as the liberation of taking completion spring when cylinder head under the installation, and two effects are accomplished in an action.

Drawings

FIG. 1 is a sectional view of a crankshaft in embodiment 1;

FIG. 2 is a schematic view of the distribution of the different layers of the coated film;

FIG. 3 is a sectional view of a crankshaft in embodiment 2;

FIG. 4 is a sectional view of a crankshaft in embodiment 3;

FIG. 5 is a schematic view of the structure of the vacuum chamber and the workpiece carrier;

FIG. 6 is a schematic view of the mounting of the workpiece carrier within the vacuum chamber after a portion of the vacuum chamber has been cut away;

FIG. 7 is a schematic illustration of FIG. 6 with the chassis, motor and input gears removed;

FIG. 8 is a schematic view of the mounting of the cage;

FIG. 9 is a schematic view of the assembled structure of the chassis;

FIG. 10 is a schematic view of the construction of the mounting post and mounting member;

FIG. 11 is an exploded view of the mount;

FIG. 12 is a schematic view of the structure of the rotary compressor;

fig. 13 is a sectional view of the rotary compressor;

FIG. 14 is a schematic illustration of a crankshaft mounting arrangement in a cylinder position;

FIG. 15 is a schematic view of the structure of the slide, spring, lock block and abutment block.

Description of reference numerals: 1. a crankshaft; 11. an upper bearing portion; 12. an eccentric portion; 13. a lower bearing portion; 14. coating a film; 141. a simple substance chromium film bonding layer; 142. a simple substance chromium film transition layer; 143. a hard carbide transition layer of chromium; 144. a diamond-like carbon film layer; 2. a housing; 21. a shell body; 22. a top cover; 221. an air outlet; 222. an exhaust pipe; 223. a binding post; 23. a bottom cover; 31. a piston; 32. a motor; 321. a rotor; 322. a stator; 33. an upper cylinder cover; 331. an upper hole; 332. an exhaust groove; 333. an exhaust hole; 334. a one-way exhaust valve; 3341. fastening nails; 3342. a valve plate; 3343. a limiting sheet; 34. a cylinder; 341. compressing the space; 342. an air suction port; 343. mounting grooves; 344. a spring hole; 345. a spring; 346. a lower cylinder cover; 3461. a lower hole; 3462. a butting block; 3463. an abutment projection; 3464. a second sliding groove; 347. a locking hole; 35. a locking block; 351. a limiting block; 352. a first sliding groove; 36. sliding blades; 361. a limiting part; 37. a reservoir; 371. connecting sheets; 372. a liquid return pipe; 373. an air intake duct; 38. a support assembly; 4. a vacuum chamber; 51. a chassis; 511. a clamping member; 5111. a splint; 5112. half-hole; 5113. an outlet hole is formed; 5114. a limiting groove; 512. a filling member; 5121. a limiting strip; 52. mounting a column; 521. mounting a boss; 522. a chute; 523. a first limiting chute; 53. a mounting member; 531. an intermediate lever; 5311. a second limiting chute; 532. an upper limiting member; 5321. an upper limiting sheet; 5322. an upper connecting column; 5323. an upper limiting convex column; 5324. an upper slide rail; 533. a lower retainer; 5331. a lower limiting sheet; 5332. a lower connecting column; 5333. a lower limiting convex column; 5334. a lower slide rail; 54. a closing door; 61. an electric motor; 62. a ball bearing; 63. a holder; 64. a ring gear; 65. a planet wheel; 66. a sun gear; 67. an input gear; 7. a motor chamber; 8. rolling a groove; 91. shifting the column; 92. a shifting sheet; 93. the dialing is quick.

Detailed Description

The present application is described in further detail below with reference to figures 1-15.

The embodiment of the application discloses a crankshaft, a crankshaft machining process and a rotor compressor.

The embodiment of the application discloses a crankshaft.

Example 1

Referring to fig. 1, a crankshaft 1 includes an upper bearing portion 11, an eccentric portion 12, and a lower bearing portion 13 in this order from top to bottom, a surface of the crankshaft 1 is coated with a DLC coating film 14, and the coating film 14 is coated on an outer wall of the upper bearing portion 11, an outer wall of the eccentric portion 12, and an outer wall of the lower bearing portion 13.

Referring to fig. 1 and 2, the coating film 14 has at least four layers and includes, in order from inside to outside, an elemental chromium film bonding layer 141, an elemental chromium film transition layer 142, a hard carbide transition layer 143 of chromium, and a diamond-like carbon film layer 144.

The diamond-like carbon film layer 144 is selected as a film on the surface of the crankshaft 1, the high hardness, the low friction coefficient, the high wear resistance and corrosion resistance and the smooth surface of the film are fully utilized, and the film can grow in a large area at the low temperature of less than 200 ℃ by various green and dry Physical Vapor Deposition (PVD) and Chemical Vapor Deposition (CVD) technologies and has the excellent characteristics of wide applicability to a substrate and the like; meanwhile, in order to improve the film-substrate binding force and increase the service performance of the crankshaft 1, the single diamond-like carbon film layer 144 is optimally designed into a multilayer film structure, and metal elements and carbon compounds thereof are introduced, so that the film-substrate binding force is further greatly improved on the premise of not losing the hardness of the diamond-like carbon film.

Example 2

Referring to fig. 3, the present embodiment is different from embodiment 1 in that only the outer walls of the lower bearing portion 13 and the eccentric portion 12 are coated with the coating film 14.

Example 3

Referring to fig. 4, the present embodiment is different from embodiment 1 in that only the outer wall of the eccentric portion 12 is coated with the coating film 14.

The embodiment of the application also discloses a processing technology of the crankshaft.

Example 4

A crankshaft machining process comprises the following steps:

1) the crankshaft of the compressor is upset out of steel at one time by a cold header;

1.1) cutting a cold heading steel cylinder with a proper length according to the required specification;

1.2) upsetting the cold heading steel cylinder into a primary upset body which is consistent with the shape of the crankshaft of the compressor and is larger than the shape of the crankshaft of the compressor through cold heading;

1.3) upsetting the preliminary upset body into an intermediate upset body with the shape and size close to the shape and size of the compressor crankshaft through cold upsetting;

1.4) cold upsetting the intermediate upset body to obtain a blank meeting the size requirement of the compressor crankshaft;

1.5) finishing the blank to obtain a crankshaft part;

2) DLC coating on the surface of the crankshaft part, wherein the DLC coating is coated on the surface of the crankshaft to be strengthened by adopting a sputtering coating process, and the coating equipment comprises a vacuum chamber and a workpiece bracket which is arranged in the vacuum chamber and can simultaneously revolve and rotate;

the structure and driving mode of the workpiece bracket are as follows:

referring to fig. 5 and 6, the workpiece carrier comprises a chassis 51, a mounting column 52 and a mounting part 53, the vacuum chamber 4 is provided with an opening and a closed door 54 for closing the opening, the chassis 51 is located at the lower part in the vacuum chamber 4, the mounting part 53 is mounted on the mounting column 52 for fixing the crankshaft 1, and a driving system is mounted in the vacuum chamber 4 for driving the workpiece carrier to run, so as to drive the crankshaft 1 on the workpiece carrier to move in the vacuum chamber 4 and better coat.

Referring to fig. 6, 7 and 8, the driving system includes a motor 61, balls 62, a holder 63, a ring gear 64, a planetary gear 65, a sun gear 66 and an input gear 67, the motor chamber 7 is provided at one side of the vacuum chamber 4, the motor 61 is installed in the motor chamber 7, a lower portion of the motor chamber 7 communicates with a bottom of the vacuum chamber 4, and the input gear 67 is installed on an output shaft of the motor 61 to be rotated by the motor 61.

Referring to fig. 8, the sun gear 66 is fixed at the bottom of the vacuum chamber 4, the bottom of the vacuum chamber 4 is provided with a plurality of rolling grooves 8, the plurality of rolling grooves 8 are distributed along the circumferential direction and the radial direction of the sun gear 66 in an array manner, the plurality of balls 62 are arranged in the plurality of rolling grooves 8 in a one-to-one correspondence manner, and the retainer 63 is fixed at the bottom of the vacuum chamber 4 and used for limiting the balls 62 to be separated from the rolling grooves 8.

Referring to fig. 6 and 7, the ring gear 64 is located at the bottom of the vacuum chamber 4 and is coaxial with the sun gear 66, the planetary gears 65 are located between the ring gear 64 and the sun gear 66, the planetary gears 65 and the ring gear 64 are supported by the balls 62, the planetary gears 65 are meshed with the sun gear 66 and the ring gear 64, the number of the planetary gears 65 can be six, the six planetary gears 65 are arranged along the circumferential direction of the sun gear 66 at equal angular intervals, the ring gear 64 is provided with external teeth and is meshed with the input gear 67, the motor 61 drives the input gear 67 to rotate, the input gear 67 drives the ring gear 64 to rotate, and the planetary gears 65 are driven to rotate by the rotation of the ring.

Referring to fig. 7, the number of the mounting columns 52 is the same as that of the planetary gears 65, the mounting columns 52 are vertically arranged, the lower ends of the mounting columns are connected with the planetary gears 65 in a key mode, and the planetary gears 65 drive the mounting columns 52 to revolve around the sun gear 66 and simultaneously drive the mounting columns 52 to rotate.

Referring to fig. 6 and 7, the chassis 51 is positioned above the planet wheel 65, the sun wheel 66 and the ring gear 64 and is coaxial with the sun wheel 66, the mounting columns 52 are limited by the chassis 51, the vertical state of the mounting columns 52 is better kept, and a plurality of mounting columns 52 are mutually related.

Referring to fig. 6 and 9, the chassis 51 includes clamping pieces 511 and filling pieces 512, the number of the clamping pieces 511 and the number of the filling pieces 512 are the same as the number of the mounting columns 52, six clamping pieces 511 and six filling pieces 512 are fan-shaped and are alternately arranged, each clamping piece 511 corresponds to one mounting column 52, the clamping pieces 511 are composed of two clamping plates 5111, half holes 5112 are formed in opposite sides of the clamping plates 5111, and when the clamping pieces 511 are composed of two clamping plates 5111, the two half holes 5112 are composed of one penetrating hole 5113 for the mounting column 52 to penetrate through.

Referring to fig. 9, a limiting groove 5114 is formed in one side of the clamping plate 5111 close to the adjacent filling member 512, limiting strips 5121 are arranged on two sides of the filling member 512 along the circumferential direction of the chassis 51, each limiting strip 5121 is slidably mounted in the limiting groove 5114, the chassis 51 is assembled by buckling the filling strips and the clamping members 511, and the assembly of the chassis 51 can be conveniently performed after the mounting column 52 and the planet wheel 65 are mounted.

Meanwhile, the side wall of the planet wheel 65 facing the chassis 51 is also provided with a rolling groove 8 and is provided with balls 62 and a retainer 63, and the chassis 51 is abutted against the balls 62 on the planet wheel 65, so that rolling friction is formed between the planet wheel 65 and the chassis 51 when the planet wheel 65 rotates.

Referring to fig. 7 and 10, the mounting pieces 53 are used for fixing the crankshaft 1, the mounting pieces 53 are mounted on the mounting columns 52 after the crankshaft 1 is fixed by the mounting pieces 53, the mounting pieces 53 are driven to move by the movement of the mounting columns 52, so that the crankshaft 1 on the mounting pieces 53 is driven to move together, three groups of mounting pieces 53 can be mounted on each mounting column 52 along the height direction, each group of mounting pieces 53 can be three and are arranged along the circumferential direction of the mounting column 52 at equal angular intervals, and the three mounting pieces 53 of two groups of mounting pieces 53 adjacent to each other along the height direction of the mounting columns 52 are arranged in.

Referring to fig. 10 and 11, the mounting member 53 includes a middle rod 531, an upper limiting member 532 and a lower limiting member 533 which are detachably connected, the upper limiting member 532 includes an upper limiting piece 5321 and an upper connecting post 5322, the lower limiting member 533 includes a lower limiting piece 5331 and a lower connecting post 5332, the upper limiting piece 5321 and the lower limiting piece 5331 are respectively disposed at two ends of the middle rod 531, opposite side walls of the upper limiting piece 5321 and the lower limiting piece 5331 are respectively provided with an upper limiting convex post 5323 and a lower limiting convex post 5333, two ends of the crankshaft 1 are respectively provided with a limiting insertion hole, and the upper limiting convex post 5323 and the lower limiting convex post 5333 are correspondingly located in the two limiting insertion holes one by one to clamp and fix the crankshaft 1.

Referring to fig. 10 and 11, the upper limiting convex column 5323 and the upper limiting piece 5321 are integrally fixed, the lower limiting convex column 5333 and the lower limiting piece 5331 are rotatably connected, so that the lower limiting convex column 5333 can rotate, a plurality of shifting blocks 93 are arranged on the side wall of the lower limiting convex column 5333, and the plurality of shifting blocks 93 are circumferentially arranged along the lower limiting convex column 5333 at intervals.

Referring to fig. 9 and 10, a plurality of shifting posts 91 are arranged on the base plate 51, the number of the shifting posts 91 is consistent with that of the mounting posts 52, the shifting posts 91 are in one-to-one correspondence, shifting pieces 92 are arranged on the shifting posts 91 in a suspending manner, shifting blocks 93 are shifted through the shifting pieces 92, the rotation of the lower limiting convex posts 5333 is realized, the rotation of the mounting posts 52 drives the shifting pieces 92 to repeatedly shift the shifting blocks 93, and finally the crankshaft 1 can rotate and is coated more uniformly.

Referring to fig. 10 and 11, the upper connection column 5322 and the lower connection column 5332 are respectively disposed on two sides of the middle rod 531, the side wall of the installation column 52 is provided with an installation protrusion 521 for the installation of the installation component 53 in a sliding manner, the installation protrusion 521 is vertically provided with a sliding chute 522, the opposite groove wall of the sliding chute 522 is provided with a first limiting sliding chute 523, the middle rod 531 is provided with a second limiting sliding chute 5311 facing the two side walls of the first limiting sliding chute 523, the two sides of the upper connection column 5322 are integrally provided with upper sliding rails 5324 and are slidably installed in the first limiting sliding chute 523 and the second limiting sliding chute 5311 which are oppositely disposed one by one, the two sides of the lower connection column 5332 are integrally provided with lower sliding rails 5334 and are slidably installed in the first limiting sliding chute 523 and the second limiting sliding chute 5311 which are oppositely disposed one by one, and the side wall of the lower limiting sheet 5331 is deviated from.

2.1), cleaning the matrix: fixing the crankshaft substrate with the surface pretreated on mounting pieces, and then fixing the mounting pieces and the crankshaft on mounting columns, wherein before the crankshaft is mounted, a sleeve is sleeved outside the crankshaft or a film for covering is wrapped and adhered on the crankshaft, so that the surface of the crankshaft, which does not need to be coated, is covered;

the pressure in the vacuum chamber is adjusted to 2X 10^-5Charging argon gas of 40sccm into the linear ion source, starting the linear ion source, adjusting the working current of the linear ion source to 0.2A, adjusting the power to 270W, adjusting the negative bias of the crankshaft substrate to 100V, and adjusting the working time to 33 minutes;

2.2) depositing a simple substance chromium film bonding layer deposited by assistance of a linear ion source: adjusting the negative bias voltage of a crankshaft substrate to be 100V, keeping the starting state of the linear ion source, adjusting the working current of the linear ion source to be 0.1A, continuously introducing 16sccm argon, simultaneously starting the magnetron sputtering source, adjusting the working current of the magnetron sputtering source to be 3A, introducing 40sccm argon, working for 10 minutes, and then closing the linear ion source;

2.3) depositing a metal simple substance film transition layer: adjusting the negative bias voltage of a crankshaft substrate to be 100V, keeping the starting state of a magnetron sputtering source, adjusting the working current of the magnetron sputtering source to be 3A, and introducing 40scc argon for 5 minutes;

2.4), depositing a hard carbide film transition layer of chromium: keeping the working condition in the step 2.4) unchanged, starting the linear ion source, and adjusting the working current of the linear ion source to be 0.2A: simultaneously introducing 5sccm acetylene gas, working for 13 minutes, and then closing the magnetron sputtering source;

2.5), depositing a diamond-like carbon film layer: adjusting the working current of the linear ion source to be 0.2A, the power to be 270W, adjusting the negative bias of the crankshaft substrate to be 100V, introducing acetylene gas of 40sccm, and setting the working time to be 210 minutes;

2.6), taking out the crankshaft base body: and taking out the crankshaft substrate when the temperature of the vacuum chamber is reduced to room temperature.

The thickness of the coating film is 3430.3nm, the coating film is bright black, the film-substrate binding force of the film is measured to be more than 40N, the friction coefficient is less than 0.15, and the nano indentation hardness is more than 20 GPa.

Example 5

This example differs from example 4 in that:

2.1), cleaning the matrix: fixing the crankshaft substrate with the surface pretreated on mounting pieces, and then fixing the mounting pieces and the crankshaft on mounting columns, wherein before the crankshaft is mounted, a sleeve is sleeved outside the crankshaft or a film for covering is wrapped and adhered on the crankshaft, so that the surface of the crankshaft, which does not need to be coated, is covered;

the pressure in the vacuum chamber is adjusted to 2X 10^-5Charging argon gas of 40sccm into the linear ion source, starting the linear ion source, adjusting the working current of the linear ion source to 0.2A, the power to 260W, adjusting the negative bias of the crankshaft substrate to 100V, and adjusting the working time to 30 minutes;

2.2) depositing a simple substance chromium film bonding layer deposited by assistance of a linear ion source: adjusting the negative bias voltage of a crankshaft substrate to be 100V, keeping the starting state of the linear ion source, adjusting the working current of the linear ion source to be 0.1A, continuously introducing 20sccm argon, simultaneously starting the magnetron sputtering source, adjusting the working current of the magnetron sputtering source to be 3A, introducing 40sccm argon, working for 5 minutes, and then closing the linear ion source;

2.3) depositing a metal simple substance film transition layer: adjusting the negative bias voltage of a crankshaft substrate to be 100V, keeping the starting state of a magnetron sputtering source, adjusting the working current of the magnetron sputtering source to be 2A, and introducing 50scc argon for 5 minutes;

2.4), depositing a hard carbide film transition layer of chromium: keeping the working condition in the step 2.4) unchanged, starting the linear ion source, and adjusting the working current of the linear ion source to be 0.2A: simultaneously introducing 5sccm acetylene gas, working for 8 minutes, and then closing the magnetron sputtering source;

2.5), depositing a diamond-like carbon film layer: adjusting the working current of the linear ion source to be 0.2A, the power to be 260W, adjusting the negative bias of the crankshaft substrate to be 100V, and introducing acetylene gas of 40sccm for 100 minutes;

2.6), taking out the crankshaft base body: and taking out the crankshaft substrate when the temperature of the vacuum chamber is reduced to room temperature.

The thickness of the coating film is 1750nm, the coating film is bright black, the film-substrate binding force of the film is determined to be more than 40N, the friction coefficient is below 0.15, and the nano indentation hardness is more than 20 GPa.

The embodiment of the application also discloses a rotor type compressor.

Referring to fig. 12 and 13, the rotary compressor includes a casing 2, a crankshaft 1 disposed in the casing 2, a piston 31, a motor 32, an upper cylinder cover 33, a lower cylinder cover 346, a cylinder 34, a vane 36, and a reservoir 37 disposed at one side of the casing 2, wherein the crankshaft 1 is any one of embodiment 1, embodiment 2, and embodiment 3.

Referring to fig. 12 and 13, the casing 2 includes a casing 21, a top cover 22 and a bottom cover 23, the casing 21 is in a circular tube shape penetrating from top to bottom, the top cover 22 and the bottom cover 23 are respectively located above and below the casing 21 for closing the casing 21, the top cover 22 is in an inverted bowl shape and is embedded in the upper portion of the casing 21, the bottom cover 23 is in a bowl shape and is embedded in the lower portion of the casing 21, and meanwhile, the top cover 22, the bottom cover 23 and the casing 21 are further welded and fixed, so that the integrity and the sealing performance of the casing 2 are improved.

Referring to fig. 12 and 13, the motor 32 is located at the upper portion of the housing 21, the motor 32 is composed of a rotor 321 and a stator 322, the stator 322 is fixed on the inner wall of the upper portion of the housing 21, the rotor 321 is mounted on the upper bearing portion 11 of the crankshaft 1, the portion of the upper bearing portion 11 of the crankshaft 1 where the rotor 321 is mounted and the rotor 321 are located in the middle of the stator 322, the middle of the top cover 22 is provided with an air outlet 221 and is hermetically mounted with an exhaust pipe 222 for exhausting compressed high-temperature and high-pressure refrigerant gas, the top cover 22 is further hermetically mounted with a terminal 223 for connecting with an external power supply to supply power to the motor 32, and after the motor 32 is energized, the rotor 321 rotates in the.

Referring to fig. 13 and 14, the cylinder 34 is fitted and fixed to a lower portion of the housing 21, the cylinder 34 penetrates vertically, the upper cylinder cover 33 and the lower cylinder cover 346 are respectively provided above and below the cylinder 34 and are fixed by bolts, a compression space 341 for compressing refrigerant gas is formed between the upper cylinder cover 33 and the lower cylinder cover 346 and the cylinder 34, the eccentric portion 12 of the crankshaft 1 is located in the compression space 341, the piston 31 is fitted to the eccentric portion 12 of the crankshaft 1, the piston 31 is held in contact with an inner wall of the cylinder 34 when the crankshaft 1 rotates, the upper cylinder cover 33 is provided with an upper hole 331 through which the upper bearing portion 11 of the crankshaft 1 passes, and the lower cylinder cover 346 is provided with a lower hole 3461 through which the lower bearing portion 13 of the crankshaft 1 passes.

Referring to fig. 13 and 14, the air suction port 342 is opened in the cylinder 34 for sucking the low-temperature and low-pressure refrigerant gas, the inner wall of the cylinder 34 is opened with a mounting groove 343 penetrating vertically, the slide piece 36 is slidably mounted in the mounting groove 343, and the mounting groove 343 penetrates vertically to facilitate mounting of the slide piece 36.

Referring to fig. 13 and 14, the cylinder 34 is further provided with a spring hole 344 communicating with a groove bottom of the mounting groove 343, the spring hole 344 is horizontally provided and penetrates through an outer wall of the cylinder 34, a spring 345 is mounted in the spring hole 344, and the spring 345 is clamped between the sliding piece 36 and an inner wall of the housing 2.

Referring to fig. 14 and 15, a locking hole 347 penetrating through the spring hole 344 is vertically formed in the cylinder 34, the aperture of the locking hole 347 is larger than that of the spring hole 344, the locking block 35 is installed in a portion, located above the spring hole 344, of the locking hole 347 in a sliding mode, the side wall, facing the spring 345, of the locking block 35 is provided with two limiting blocks 351, the two limiting blocks 351 are arranged at intervals along the length direction of the spring hole 344, the locking block 35 is vertically provided with a first sliding groove 352, the locking block 35 cannot interfere with sliding of the sliding piece 36, the limiting blocks 351 close to the sliding piece 36 are divided into two parts by the first sliding groove 352, and the compressed spring 345 can be limited in the locking hole 347 through the two limiting blocks 351.

Referring to fig. 14 and 15, an abutting block 3462 abutting against the lock block 35 and preventing the lock block 35 from falling down is disposed on the lower cylinder cover 346, the abutting block 3462 is disposed below the spring hole 344, two abutting protrusions 3463 are disposed on the abutting block 3462, the two abutting protrusions 3463 pass through the spring hole 344 to abut against the lock block 35 and are disposed on two sides of the spring 345, the diameter of the lock hole 347 is larger than that of the spring hole 344, and the diameter of the lock hole 347 intersects with that of the spring hole 344, so that the abutting protrusion 3463 does not interfere with the compression movement of the spring 345 and the sliding movement of the sliding piece 36, a second sliding groove 3464 is disposed on the abutting block 3462, the second sliding groove 3464 is disposed between the two abutting protrusions 3463, and the protrusion 3463 does not interfere with the sliding movement of the sliding piece 36 by disposing the second sliding groove 3464.

Referring to fig. 14 and 15, a limiting portion 361 is convexly disposed on a side wall of the sliding piece 36 close to the spring 345, one end of the spring 345 close to the sliding piece 36 is embedded in the two mounting notches, and the limiting portion 361 is inserted into the spring 345 to limit the spring 345.

Referring to fig. 14 and 15, one end of the sliding piece 36 is located in the compression space 341 and abuts against the piston 31, the other end of the sliding piece 36 is kept in abutment against the piston 31 by the driving of the spring 345, and when the crankshaft 1 drives the piston 31 to rotate, the sliding piece 36 slides in the mounting groove 343 to and fro under the action of the piston 31.

Referring to fig. 14, the upper cylinder cover 33 is provided with an exhaust groove 332, the exhaust groove 332 is long, an exhaust hole 333 is formed in a groove bottom at one end of the exhaust groove 332, a one-way exhaust valve 334 is installed in the exhaust groove 332, the one-way exhaust valve 334 comprises a fastening pin 3341, a valve plate 3342 and a limiting piece 3343, one end of the limiting piece 3343 and one end of the valve plate 3342 are overlapped up and down, the fastening pin 3341 penetrates through the overlapped end of the valve plate 3342 and the limiting piece 3343 and is fixed at one end of the exhaust groove 332 far away from the exhaust hole 333, one end of the valve plate 3342 far away from the fastening pin 3341 seals the exhaust hole 333, one end of the limiting piece 3343 far away from the fastening pin 3341 is bent and is located above the valve plate 3342, the thickness of the limiting piece 3343 is larger than that of the valve plate 3342, so that the limiting piece 3343 is not easy to bend, the exhaust hole 333 is sealed by, so that the valve sheet 3342 is not easily damaged.

In which the discharge hole 333 and the suction hole 342 are separately provided at both sides of the sliding vane 36, the sliding vane 36 is engaged with the piston 31 so that the compression space 341 is divided into two parts most of the time, and the discharge hole 333 and the suction hole 342 are respectively communicated with one part of the compression space 341.

Referring to fig. 12 and 13, the liquid reservoir 37 is fixed to the casing 21 through a connecting piece 371, the connecting piece 371 is bent and has two ends welded to the casing 21, the liquid reservoir 37 is located between the connecting piece 371 and the casing 21 and is limited by the connecting piece 371, a liquid return pipe 372 is installed on the upper portion of the liquid reservoir 37, a gas suction pipe 373 is further installed on the liquid reservoir 37, one end of the gas suction pipe 373 is located in the liquid reservoir 37, the other end of the gas suction pipe 373 penetrates out of the lower portion of the liquid reservoir 37 and penetrates through the casing 21 to be installed in a gas suction port 342 of the cylinder 34, and the liquid reservoir.

Referring to fig. 5, a plurality of support members 38 are disposed under the bottom cover 23, and in the present embodiment, there are three support members 38, and three support members 38 are disposed at equal angular intervals along the circumferential direction of the bottom cover 23 for supporting the compressor.

The implementation principle of the rotor compressor in the embodiment of the application is as follows: the motor 32 drives the crankshaft 1, the eccentric part 12 of the crankshaft 1 drives the piston 31 to do periodic rotation motion in the compression space 341, in operation, one end of the sliding vane 36 is tightly attached to the outer diameter surface of the piston 31 under the elastic force of the spring 345, the compression space 341 is divided into two closed chambers, the compression work process of the refrigerant is completed under the work of the motor 32, meanwhile, when the rotor 321 type compressor is assembled, the upper cylinder cover 33 is installed on the crankshaft 1, then the rotor 321 is installed on the crankshaft 1, then the eccentric part 12 of the crankshaft 1 passes through the stator 322 and the shell 2 to be placed into the cylinder 34, the upper cylinder cover 33 is fixed with the cylinder 34, the part of the crankshaft 1 where the rotor 321 is installed returns to the middle of the stator 322, the cylinder 34 is installed into the shell 21, then the liquid accumulator 37 and the air suction pipe 373 are installed, the liquid accumulator 37 is communicated with the cylinder 34, then the binding post 223 is, the top cover 22 is fixed on the shell body 21, and finally, the top cover 22 is inserted into the locking hole 347 through the abutting block 3462 on the lower cylinder cover 346, the abutting bulge 3463 on the abutting block 3462 jacks up the locking block 35, so that the pressing effect of the locking block 35 on the spring 345 is relieved, one end of the spring 345 abuts against the inner wall of the shell body 21, the other end of the spring 345 pushes the sliding sheet 36 to abut against the piston 31, the cylinder 34 is not easily influenced by the spring 345 and the sliding sheet 36 during installation, and finally, the bottom cover 23 is installed to complete the assembly of the rotor 321 type compressor.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.