阅读说明：本技术 一种偏心活塞无油旋转压缩机 (Eccentric piston oil-free rotary compressor ) 是由 刘峰 李继伟 于 2018-09-03 设计创作，主要内容包括：本发明提供一种偏心活塞无油旋转压缩机。所述偏心活塞无油旋转压缩机包括电机、外壳和接线插口,还包括：缸体；驱动轴；偏心活塞,所述偏心活塞的旋转中心与所述缸体同心,且所述偏心活塞与所述缸体相切；滑槽；复位弹簧,所述复位弹簧嵌入所述滑槽延伸至所述缸体；滑板,所述滑板嵌入所述滑槽延伸至所述复位弹簧,所述滑板与所述滑槽滑动连接,且所述滑板背离所述复位弹簧的一端与所述偏心活塞抵触；进气孔；排气孔；膨胀腔；压缩腔,所述滑板与所述偏心活塞将所述缸体分隔成用于吸入空气的月牙形的所述膨胀腔与用于压缩空气的月牙形的所述压缩腔。本发明提供的偏心活塞无油旋转压缩机具有压缩性能好、散热性能好、加工方便的优点。(The invention provides an eccentric piston oil-free rotary compressor. Eccentric piston oil-free rotary compressor includes motor, shell and wiring socket, still includes: a cylinder body; a drive shaft; the rotation center of the eccentric piston is concentric with the cylinder body, and the eccentric piston is tangent with the cylinder body; a chute; the return spring is embedded into the sliding groove and extends to the cylinder body; the sliding plate is embedded into the sliding groove and extends to the return spring, the sliding plate is connected with the sliding groove in a sliding mode, and one end, away from the return spring, of the sliding plate abuts against the eccentric piston; an air inlet; an exhaust hole; an expansion chamber; the sliding plate and the eccentric piston divide the cylinder body into a crescent expansion cavity for sucking air and a crescent compression cavity for compressing air. The eccentric piston oil-free rotary compressor provided by the invention has the advantages of good compression performance, good heat dissipation performance and convenience in processing.)

1. The utility model provides an eccentric piston oil-free rotary compressor, includes motor, shell and wiring socket, its characterized in that still includes:

a cylinder body;

the driving shaft is connected with the motor and is rotationally connected with the cylinder body of the cylindrical structure, and the central axis of the driving shaft and the central axis of the cylinder body are on the same straight line;

the eccentric piston is fixed on the driving shaft, the rotating center of the eccentric piston for compressing air is concentric with the cylinder body, and the eccentric piston is tangent with the cylinder body;

the sliding chute is arranged inside the cylinder body;

the return spring is embedded into the sliding groove and extends to the cylinder body;

the sliding plate is embedded into the sliding groove and extends to the return spring, the sliding plate is connected with the sliding groove in a sliding mode, and one end, away from the return spring, of the sliding plate abuts against the eccentric piston;

the air inlet hole penetrates through the cylinder body;

the exhaust hole and the air inlet hole symmetrically penetrate through the cylinder body relative to the sliding plate;

the sliding plate and the eccentric piston enclose one end of the cylinder body close to the air inlet hole into the expansion cavity;

the sliding plate and the eccentric piston divide the cylinder body into a crescent expansion cavity for sucking air and a crescent compression cavity for compressing air.

2. An eccentric piston oil-free rotary compressor as claimed in claim 1, wherein the eccentric piston comprises a driving sleeve, a plurality of connecting plates and a fixing sleeve, the driving shaft is detachably connected with the fixing sleeve of the cylinder structure for transmission, a plurality of connecting plates for connecting the driving sleeve are arranged in the circumferential direction of the fixing sleeve, and the driving sleeve for compressing air and the cylinder body to form a crescent-shaped compression cavity is fixed at one end of the connecting plate, which is far away from the fixing sleeve.

3. An eccentric piston oil-free rotary compressor as claimed in claim 2, wherein the center of rotation of the driving sleeve is concentric with the cylinder block, and the driving sleeve is tangential to an inner side wall of the cylinder block.

4. An eccentric piston oil-free rotary compressor according to claim 2, wherein the sliding plate and the driving sleeve divide the inner cylindrical cavity of the cylinder into the expansion chamber of a crescent shape for sucking air and the compression chamber of a crescent shape for compressing air, and the sliding plate interferes with the driving sleeve.

5. An eccentric piston oil-free rotary compressor as claimed in claim 2, wherein one end of the driving sleeve facing away from the return spring is of a semi-cylindrical structure, and the length of the sliding plate is greater than the difference between the maximum distance of the driving shaft from the side wall of the driving sleeve and the minimum distance of the driving shaft from the side wall of the driving sleeve.

6. An eccentric piston oil-free rotary compressor as claimed in claim 2, wherein a plane where a center line of the sliding plate and a center line of the driving shaft are located is parallel to a side surface of the sliding plate, and the length of the sliding groove is greater than the sum of the minimum contraction length of the return spring and the length of the sliding plate.

7. An eccentric piston oil-free rotary compressor as claimed in claim 2, wherein the eccentric piston further comprises a guide plate disposed between the driving sleeve and the fixed sleeve, and the guide plate and the adjacent side wall of the driving sleeve are fixed to the connection plate.

8. An eccentric piston oil-free rotary compressor as claimed in claim 7, wherein the guide plate is of an arc structure and is detachably connected to the connection plate.

9. An eccentric piston oil-free rotary compressor as claimed in claim 2, wherein the eccentric piston further comprises a balance weight, the balance weight is detachably connected with the driving sleeve, and the balance weight is of a fan-shaped structure.

Technical Field

The invention relates to the technical field of compressors, in particular to an eccentric piston oil-free rotary compressor.

Background

The rolling piston compressor and the rotor compressor, which are representatives of the second generation compressor, are provided with a crescent-shaped working cavity, the crescent-shaped working cavity is separated into an expansion cavity and a compression cavity through a sliding plate, and the rotary part changes the volumes of the expansion cavity and the compression cavity to realize air suction (liquid) and air exhaust (liquid) of the compressor.

However, the traditional rolling piston compression machine and the rotor compression machine have the problems of high processing precision and the like, the application of the traditional rolling piston compression machine and the rotor compression machine is widely limited, at present, only some applications are obtained in the refrigeration compression industry, the roundness precision of the piston and the cylinder body is required to be high because the contact between the outer surface of the piston and the inner surface of the cylinder body is full contact, and in addition, the compression heat and the friction heat generated by a machine during working cannot be quickly discharged, the heat dissipation performance is poor, so that the cylinder body and the piston are subjected to thermal expansion deformation, and the sealing is ineffective.

Therefore, there is a need to provide a new eccentric piston oil-free rotary compressor to solve the above technical problems.

Disclosure of Invention

The technical problem to be solved by the invention is to provide an eccentric piston oil-free rotary compressor which is good in compression performance, good in heat dissipation performance and convenient to process.

In order to solve the above technical problems, the present invention provides an eccentric piston oil-free rotary compressor comprising: motor, shell and wiring socket still include: a cylinder body; the driving shaft is connected with the motor and is rotationally connected with the cylinder body of the cylindrical structure, and the central axis of the driving shaft and the central axis of the cylinder body are on the same straight line; the eccentric piston is fixed on the driving shaft, the rotating center of the eccentric piston for compressing air is concentric with the cylinder body, and the eccentric piston is tangent with the cylinder body; the sliding chute is arranged inside the cylinder body; the return spring is embedded into the sliding groove and extends to the cylinder body; the sliding plate is embedded into the sliding groove and extends to the return spring, the sliding plate is connected with the sliding groove in a sliding mode, and one end, away from the return spring, of the sliding plate abuts against the eccentric piston; the air inlet hole penetrates through the cylinder body; the exhaust hole and the air inlet hole symmetrically penetrate through the cylinder body relative to the sliding plate; the sliding plate and the eccentric piston enclose one end of the cylinder body close to the air inlet hole into the expansion cavity; the sliding plate and the eccentric piston divide the cylinder body into a crescent expansion cavity for sucking air and a crescent compression cavity for compressing air.

Preferably, eccentric piston includes driving sleeve, a plurality of connecting plate and fixed cover, the drive shaft with be used for driven cylinder structure fixed cover can dismantle and be connected, be equipped with a plurality ofly on the circumferencial direction of fixed cover and be used for connecting the driving sleeve the connecting plate, and be used for compressed air with the cylinder body encloses into crescent compression cavity the driving sleeve is fixed in the connecting plate deviates from the one end of fixed cover.

Preferably, the center of rotation of the driving sleeve is concentric with the cylinder body, and the driving sleeve is tangent to the inner side wall of the cylinder body.

Preferably, the slide with the driving sleeve will the inside cylindrical cavity of cylinder body is separated into the crescent that is used for the intake air expansion chamber with be used for the crescent of compressed air compression chamber, just the slide with the driving sleeve is contradicted.

Preferably, one end of the driving sleeve, which is far away from the return spring, is of a semi-cylindrical structure, and the length of the sliding plate is greater than the difference between the maximum distance from the driving shaft to the side wall of the driving sleeve and the minimum distance from the driving shaft to the side wall of the driving sleeve.

Preferably, a plane where a center line of the sliding plate and a center line of the driving shaft are located is parallel to a side surface of the sliding plate, and a length of the sliding groove is greater than a sum of a minimum contraction length of the return spring and a length of the sliding plate.

Preferably, the eccentric piston further comprises a guide plate, the guide plate is arranged between the driving sleeve and the fixed sleeve, and the guide plate and the adjacent side wall of the driving sleeve are fixed on the connecting plate.

Preferably, the guide plate is of an arc-shaped structure, and the guide plate is detachably connected with the connecting plate.

Preferably, the eccentric piston further comprises a balance block, the balance block is detachably connected with the driving sleeve, and the balance block is of a fan-shaped structure.

Compared with the related art, the eccentric piston oil-free rotary compressor provided by the invention has the following beneficial effects:

the invention provides an oil-free rotary compressor with an eccentric piston, wherein the rotation center of the eccentric piston is concentric with a cylinder body, the outer side surface of the eccentric piston is tangent to the inner side surface of the circular cylinder body, a crescent-shaped working cavity is formed, so that the volumetric efficiency of the cylinder body is obviously improved, higher output pressure can be obtained, the friction loss between the cylinder body and the eccentric piston is reduced, the mechanical efficiency is improved, a cooling system is improved, the heat dissipation effect and the compression efficiency are improved, the reliability of machinery is improved, the sliding plate and the return spring are arranged on the inner wall of the cylinder body, the sliding plate penetrates through the working cavity to be tangent to the outer surface of the eccentric piston under the action of the return spring, the sliding plate is in sliding connection with a sliding groove, the sliding plate divides the working cavity into an expansion cavity and a compression cavity, and the expansion cavity and the compression cavity are respectively provided with an air inlet hole and an exhaust hole, the slide plate can be driven to do reciprocating motion under the action of the return spring, a guide rail is omitted, parts and leakage channels are reduced, and the heat dissipation, the leakage, the processing capacity, the machine volume and the number of the parts are greatly improved.

Drawings

Fig. 1 is a schematic structural view of a preferred embodiment of an eccentric piston oil-free rotary compressor according to the present invention;

FIG. 2 is a schematic view of the eccentric piston shown in FIG. 1;

FIG. 3 is a schematic diagram illustrating an operation of an eccentric piston oil-free rotary compressor according to a preferred embodiment of the present invention;

fig. 4 is a schematic view of the overall structure of the eccentric piston oil-free rotary compressor according to the present invention.

Reference numbers in the figures: 1. the device comprises a cylinder body, 2, a driving shaft, 3, an eccentric piston, 31, a balance block, 32, a guide plate, 33, a driving sleeve, 34, a connecting plate, 35, a fixing sleeve, 4, a sliding groove, 5, a return spring, 6, a sliding plate, 7, an air inlet hole, 8, an exhaust hole, 9, an expansion cavity, 9a, a compression cavity, 9b, a motor, 9c, a shell, 9d and a wiring socket.

Detailed Description

The invention is further described with reference to the following figures and embodiments.

Referring to fig. 1, fig. 2, fig. 3 and fig. 4 in combination, wherein fig. 1 is a schematic structural view of an eccentric piston oil-free rotary compressor according to a preferred embodiment of the present invention; FIG. 2 is a schematic view of the eccentric piston shown in FIG. 1; FIG. 3 is a schematic diagram illustrating an operation of an eccentric piston oil-free rotary compressor according to a preferred embodiment of the present invention; fig. 4 is a schematic view of the overall structure of the eccentric piston oil-free rotary compressor according to the present invention. The eccentric piston oil-free rotary compressor includes: motor 9b, shell 9c and wiring socket 9d still include: a cylinder body 1; the driving shaft 2 is connected to the motor 9b and is rotationally connected with the cylinder body 1 in a cylindrical structure, and the central axis of the driving shaft 2 is on the same straight line with the central axis of the cylinder body 1; an eccentric piston 3, the eccentric piston 3 being fixed to the driving shaft 2, a rotation center of the eccentric piston 3 for compressing air being concentric with the cylinder block 1, and the eccentric piston 3 being tangential to the cylinder block 1; the sliding chute 4 is arranged inside the cylinder body 1; the return spring 5 is embedded into the sliding groove 4 and extends to the cylinder body 1; the sliding plate 6 is embedded into the sliding chute 4 and extends to the return spring 5, the sliding plate 6 is in sliding connection with the sliding chute 4, and one end of the sliding plate 6, which is far away from the return spring 5, is abutted against the eccentric piston 3; the air inlet 7, the said air inlet 7 runs through the said cylinder block 1; the exhaust hole 8 and the air inlet hole 7 symmetrically penetrate through the cylinder body 1 about the sliding plate 6; the sliding plate 6 and the eccentric piston 3 enclose one end of the cylinder body 1 close to the air inlet 7 into an expansion cavity 9; the compression cavity 9a, the sliding plate 6 and the eccentric piston 3 divide the cylinder body 1 into a crescent expansion cavity 9 for sucking air and a crescent compression cavity 9a for compressing air.

The eccentric piston 3 comprises a driving sleeve 33, a plurality of connecting plates 34 and a fixing sleeve 35, the driving shaft 2 is detachably connected with the fixing sleeve 35 of a cylinder structure for transmission, a plurality of connecting plates 34 for connecting the driving sleeve 33 are arranged in the circumferential direction of the fixing sleeve 35, the driving sleeve 33 for compressing air and the cylinder body 1 to form a crescent compression cavity is fixed at one end of the connecting plate 34 departing from the fixing sleeve 35, the driving shaft 2 rotates clockwise, the driving sleeve 33 concentric with the cylinder body 1 drives the sliding plate 6 to reciprocate in the sliding groove 4, the fixing sleeve 35 drives the driving sleeve 33 to do clockwise periodic motion through the connecting plates 34, the angle is changed from 0 degrees to 360 degrees in one period, and when =0 degrees, the working cavity is in the air (liquid) suction and exhaust ending state of the previous period, as the angle increases, the newly formed expansion chamber 9 gradually becomes larger, and starts to suck the external gas (liquid) from the gas inlet 7, while the expansion chamber 9 of the previous cycle starts to be closed, which changes to the compression chamber 9a of the working cycle and discharges the gas (liquid) from the gas outlet 8; when =360 °, a cycle of the suction (liquid) process and the exhaust (liquid) process is completed, and the suction (liquid) process and the exhaust (liquid) process of the eccentric piston compression machine are realized in a circulating manner.

The rotation center of the driving sleeve 33 is concentric with the cylinder body 1, and the driving sleeve 33 is tangent to the inner side wall of the cylinder body 1, so that the driving is more reasonable. In this embodiment, slide 6 with driving sleeve 33 will the crescent who is used for the intake air is separated into to the inside cylindrical cavity of cylinder body 1 expand chamber 9 with the crescent who is used for compressed air compression chamber 9a, just slide 6 with driving sleeve 33 contradicts, driving sleeve 33's centre of rotation with cylinder body 1 is concentric, driving sleeve 33's lateral surface keeps and is circular shape 1 medial surface of cylinder body is tangent, is formed with the working chamber of a crescent, makes 1's of cylinder body volumetric efficiency is showing and is improving to can obtain higher output pressure, and reduced cylinder body 1 with driving sleeve 33's frictional loss has improved mechanical efficiency, has improved cooling system.

The end of the driving sleeve 33 departing from the return spring 5 is a semi-cylinder structure, the length of the sliding plate 6 is greater than the difference between the maximum distance from the driving shaft 2 to the side wall of the driving sleeve 33 and the minimum distance from the driving shaft 2 to the side wall of the driving sleeve 33, in order to reduce the contact area between the sliding plate 6 and the driving sleeve 33, the sliding plate 6 is convenient to slide, and the friction force and the abrasion thereof are reduced.

The plane of the central line of the sliding plate 6 and the central line of the driving shaft 2 is parallel to the side surface of the sliding plate 6, and the length of the sliding groove 4 is greater than the sum of the minimum contraction length of the return spring 5 and the length of the sliding plate 6, so as to prevent the sliding plate 6 from slipping, and prevent the driving sleeve 33 and the sliding plate 6 thereof from being damaged due to the elastic change of the return spring 5.

Eccentric piston 3 still includes guide plate 32, guide plate 32 is located actuating sleeve 33 with between the fixed cover 35, guide plate 32 with the adjacent lateral wall of actuating sleeve 33 is fixed in connecting plate 34, guide plate 32 is the arc structure, just guide plate 32 with connecting plate 34 can dismantle the connection fixed cover 35 rotates the in-process, the arc structure guide plate 32 rotates, and is right the inside of actuating sleeve 33 dispels the heat, has improved the radiating effect.

Eccentric piston 3 still includes balancing piece 31, balancing piece 31 with driving sleeve 33 can dismantle the connection, just balancing piece 31 is fan-shaped structure, for the convenience of correction driving sleeve 33 is balanced, the easy access maintenance equipment.

The eccentric piston oil-free rotary compressor provided by the invention is respectively manufactured into 20 sets, then the eccentric piston oil-free rotary compressor provided by the invention and a common 20 sets of compressors with the same grade are respectively put into the same equipment for use, and multiple periodical data comparison shows that the compression efficiency of the eccentric piston oil-free rotary compressor provided by the invention is 9% higher than that of the common compressor with the same grade, the heat dissipation efficiency of the eccentric piston oil-free rotary compressor provided by the invention is 7% higher than that of the common compressor with the same grade, the service life of the eccentric piston oil-free rotary compressor provided by the invention is 4% higher than that of the common compressor with the same grade, and the convenience in maintenance of the eccentric piston oil-free rotary compressor provided by the invention are 6% higher than that of the common compressor with the same grade.

The working principle of the eccentric piston oil-free rotary compressor provided by the invention is as follows:

firstly, the model number of the motor 9b is YL112M, the motor is a miniature alternating current gear reduction motor, and the optical axis rotating speed: 1400 revolutions (speed regulation 90-1400 revolutions), the motor 9b drives the driving shaft 2 to rotate, the driving shaft 2 rotates clockwise, the driving sleeve 33 concentric with the cylinder body 1 drives the sliding plate 6 to reciprocate in the sliding chute 4, the fixed sleeve 35 drives the driving sleeve 33 to do clockwise periodic motion through the connecting plate 34, the working chamber is changed from 0 degrees to 360 degrees in one period, when =0 degrees, the working chamber is in a state of finishing air (liquid) suction and exhaust in the previous period, the newly formed expansion chamber 9 is gradually enlarged along with the increase of the angle, external air (liquid) is sucked from the air inlet 7, the expansion chamber 9 in the previous period is closed, the compression chamber 9a in the working period is changed, and the air (liquid) is exhausted from the air outlet 8; when =360 °, a cycle of air (liquid) suction and exhaust processes is completed, and such cycle is performed, so as to realize the air (liquid) suction and exhaust processes of the eccentric piston compression machinery, in the rotating process of the fixed sleeve 35, the guide plate 32 of the arc structure rotates to radiate the inside of the driving sleeve 33, thereby improving the radiation effect, the rotation center of the driving sleeve 33 is concentric with the cylinder body 1, the outer side surface of the driving sleeve 33 is kept tangent to the inner side surface of the circular cylinder body 1, a crescent working cavity is formed, so that the volumetric efficiency of the cylinder body 1 is remarkably improved, higher output pressure can be obtained, the friction loss between the cylinder body 1 and the driving sleeve 33 is reduced, the mechanical efficiency is improved, the cooling system is improved, the radiation effect and the compression efficiency are improved, the mechanical reliability is improved, the inner wall of the cylinder body 1 is provided with the sliding plate 6 and the reset spring 5, the sliding plate 6 penetrates through a working cavity to be tangent to the outer surface of the driving sleeve 33 under the action of the return spring 5, the sliding plate 6 is in sliding connection with the sliding chute 4, the working cavity is divided into the expansion cavity 9 and the compression cavity 9a by the sliding plate 6, the expansion cavity 9 and the compression cavity 9a are respectively provided with the air inlet 7 and the air outlet 8, the sliding plate 6 can be driven to do reciprocating motion under the action of the return spring 5, a guide rail is eliminated, the driving sleeve 33 which restricts translational motion through the sliding plate 6 changes the motion mode from high-speed rotation to low-speed translational motion, the relative motion speed with the cylinder body 1 is reduced by one order of magnitude, parts and leakage channels are reduced, the heat dissipation, the leakage, the processing process capability, the machine volume and the number of the parts are greatly improved, the balancing block 31 with a sector structure which can be detachably connected is arranged on the driving sleeve 33, the driving sleeve 33 is corrected more conveniently, the maintenance and repair equipment is more convenient, the sliding plate 6 adopting powder metallurgy simplifies the processing technology, the driving sleeve 33 and the friction bottom of the cylinder body 1 can be filled with polytetrafluoroethylene, so that the processing requirements on the cylinder body 1 and the driving sleeve 33 are reduced, and the driving sleeve 33 has the basis of batch production.

Compared with the related art, the eccentric piston oil-free rotary compressor provided by the invention has the following beneficial effects:

the invention provides an oil-free rotary compressor with eccentric pistons, wherein the rotation center of an eccentric piston 3 is concentric with a cylinder body 1, the outer side surface of the eccentric piston 3 is tangent to the inner side surface of the circular cylinder body 1 to form a crescent-shaped working cavity, so that the volume efficiency of the cylinder body 1 is obviously improved, higher output pressure can be obtained, the friction loss between the cylinder body 1 and the eccentric piston 3 is reduced, the mechanical efficiency is improved, a cooling system is improved, the heat dissipation effect and the compression efficiency are improved, the mechanical reliability is improved, the inner wall of the cylinder body 1 is provided with a sliding plate 6 and a return spring 5, the sliding plate 6 penetrates through the working cavity to be tangent to the outer surface of the eccentric piston 3 under the action of the return spring 5, the sliding plate 6 is in sliding connection with a sliding groove 4, the sliding plate 6 divides the working cavity into an expansion cavity 9 and a compression cavity 9a, the expansion cavity 9 and the compression cavity 9a are respectively provided with the air inlet 7 and the exhaust hole 8, the sliding plate 6 can be driven to do reciprocating motion under the action of the reset spring 5, a guide rail is omitted, parts and leakage channels are reduced, and the heat dissipation, the leakage, the processing process capacity, the machine volume and the number of the parts are greatly improved.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.