阅读说明：本技术 一种电机结构及永磁深井泵 (Motor structure and permanent magnet deep-well pump ) 是由 张灵辉 陈建国 于 2021-03-11 设计创作，主要内容包括：本申请公开了一种电机结构及永磁深井泵,涉及深井泵技术领域,其包括机壳,机壳内设有转子和定子,机壳内设有屏蔽套,屏蔽套将机壳内分隔出内腔室和外腔室,定子位于外腔室内,且外腔室填充有环氧树脂；转子位于内腔室内并与机壳转动连接,转子与屏蔽套内壁留有间隙。通过设置屏蔽套,完全隔绝了水渗入机壳内后与定子的线圈接触的情况,从而使得整体的使用更加稳定。(The application discloses a motor structure and a permanent magnet deep well pump, which relate to the technical field of deep well pumps and comprise a casing, wherein a rotor and a stator are arranged in the casing; the rotor is positioned in the inner cavity and is rotationally connected with the shell, and a gap is reserved between the rotor and the inner wall of the shielding sleeve. Through setting up the housing, completely isolated the condition of water infiltration back and the coil contact of stator in the casing to make holistic use more stable.)

1. The utility model provides a motor structure, includes casing (1), be equipped with rotor (2) and stator (3) in casing (1), its characterized in that: a shielding sleeve (4) is arranged in the machine shell (1), the shielding sleeve (4) separates the interior of the machine shell (1) into an inner chamber (101) and an outer chamber (102), the stator (3) is positioned in the outer chamber (102), and the outer chamber (102) is filled with epoxy resin; rotor (2) are located interior chamber (101) and rotate with casing (1) and be connected, rotor (2) with shield cover (4) inner wall leaves the clearance.

2. A machine structure according to claim 1, characterized in that: rotor (2) are permanent magnet rotor (2), rotor (2) include iron core (21) and are fixed in pivot (22) of iron core (21), iron core (21) outer wall is including the shielding layer, rotor (2) with the clearance of housing (4) inner wall is 3-3.5 mm.

3. A machine structure according to claim 2, characterized in that: an axial end of the machine shell (1) is provided with a mounting hole (121), the mounting hole (121) is communicated with the inner chamber (101), the machine shell (1) is further provided with a mounting groove (122), and the mounting groove (122) is positioned at one end, far away from the inner chamber (101), of the mounting hole (121) and is coaxially arranged with the mounting hole (121);

the mounting groove (122) is provided with a centering piece (5), and the centering piece (5) comprises a regulating ring (51) embedded in the mounting groove (122) and a first friction ring (52) sleeved on the rotating shaft (22) and rotating with the regulating ring (51); the adjusting ring (51) is in clearance fit with the mounting groove (122).

4. A machine structure according to claim 3, characterized in that: the mounting groove (122) is in threaded connection with a locking ring (7), the locking ring (7) is used for limiting the adjusting ring (51) to be separated from the mounting groove (122), and a gap of 0.1-0.2mm is reserved between the locking ring (7) and the adjusting ring (51);

the rotating shaft (22) penetrates out of the locking ring (7), one end, far away from the adjusting ring (51), of the locking ring (7) is provided with a sand blocking groove (8), a sand blocking ring (9) is arranged in the sand blocking groove (8), and the rotating shaft (22) is sleeved with the sand blocking ring (9);

one end, close to the adjusting ring (51), of the locking ring (7) is provided with a sealing groove (10), a sealing element (14) is arranged in the sealing groove (10), and the rotating shaft (22) is sleeved with the sealing element (14).

5. A machine structure according to claim 3, characterized in that: one end of the machine shell (1) far away from the aligning piece (5) is provided with a positioning hole (131), the positioning hole (131) is communicated with the inner chamber (101), and the positioning hole (131) is provided with positioning seats (15) and (6); the end faces, far away from the inner cavity (101), of the positioning seats (15) and (6) are provided with through holes (152), the rotating shaft (22) extends into the through holes (152) and is rotatably connected with the positioning seats (15) and (6), and the end parts, close to the inner cavity (101), of the positioning seats (15) and (6) are provided with thrust disc assemblies (18); the thrust disc assembly (18) comprises a thrust seat (181) arranged on the positioning seats (15) and (6), a plurality of adjusting blocks (183) arranged at one ends, far away from the positioning seats (15) and (6), of the thrust seat (181), and supporting rings (182) arranged at one ends, far away from the thrust seat (181), of the adjusting blocks (183);

the adjusting blocks (183) are circumferentially and uniformly distributed along the axis of the rotating shaft (22), each adjusting block (183) comprises a touch plate (1831), a positioning block (1832) fixed to one end, close to the thrust seat (181), of the touch plate (1831) and a convex ball (1833) fixed to one end, far away from the touch plate (1831), of the positioning block (1832), an accommodating groove (1813) is correspondingly formed in one end, far away from the positioning seats (15) and (6), of the thrust seat (181), and the positioning block (1832) is located in the accommodating groove (1813) and achieves overturning adjustment of the touch plate (1831) through the convex ball (1833);

the pivot (22) is located in support ring (182) cover, the one end that support ring (182) is close to regulating block (183) is contradicted in each conflict board (1831), the one end that regulating block (183) was kept away from in support ring (182) is contradicted in the axial terminal surface of iron core (21).

6. An electrical machine construction according to claim 5, wherein: the end faces, close to the thrust seat (181), of the positioning seats (15) and (6) are provided with positioning parts (151), and the outer diameters of the positioning parts (151) are gradually reduced towards the direction close to the thrust seat (181); the end face of the thrust seat (181) close to the positioning seats (15) and (6) is provided with a positioning groove (1811) for embedding and positioning the positioning part (151); the end face of the positioning part (151) close to the thrust seat (181) is further provided with a limiting groove (1511), and the end face of the thrust seat (181) close to the positioning part (151) is provided with a limiting block (1812) embedded into the limiting groove (1511).

7. An electrical machine construction according to claim 5, wherein: a groove (17) is formed in one end, far away from the inner cavity (101), of each positioning seat (15) and (6), the groove (17) is communicated with the inner cavity (101), the groove (17) is used for mounting an oil supply crusty pancake (24), the oil supply crusty pancake (24) has elasticity, and the groove (17) is covered after the oil supply crusty pancake (24) is mounted.

8. A permanent magnet deep well pump, characterized in that: an electric machine structure comprising a motor according to any one of claims 1 to 7, further comprising a water pumping assembly (19), said water pumping assembly (19) comprising an impeller (191) coaxially connected to said rotor (2) and a pump housing (192) disposed in said casing (1) and enclosing said impeller (191).

9. A permanent magnet deep well pump, characterized in that: an electric machine structure comprising any one of claims 1 to 6, further comprising a water pumping assembly (19), wherein the water pumping assembly (19) comprises an impeller (191) coaxially connected with the rotor (2) and a pump sleeve (192) arranged on the casing (1) and sleeved with the impeller (191);

the frequency conversion device is characterized by further comprising a frequency conversion assembly (20), wherein the frequency conversion assembly (20) comprises an installation shell (201) arranged on the machine shell (1) and a frequency converter (202) arranged in the installation shell (201); the frequency converter (202) is electrically connected with the stator (3); the mounting shell (201) is filled with epoxy resin.

10. The permanent magnet deep well pump of claim 9, wherein: a connecting disc (23) is further arranged between the machine shell (1) and the mounting shell (201), one end of the connecting disc (23) covers the machine shell (1), and the other end of the connecting disc (23) covers the mounting shell (201); a mounting cavity (234) is formed in one end, close to the shell (1), of the connecting disc (23), the mounting cavity (234) is communicated with the inner cavity (101), an oil crusty pancake (24) is arranged in the mounting cavity (234), the oil crusty pancake (24) has elasticity, the mounting cavity (234) is divided into two cavities by the oil crusty pancake (24), the mounting cavity (234) is communicated with a compensation hole (236), and the compensation hole (236) is communicated with the cavity, far away from the shell (1), of the oil crusty pancake (24);

one end, close to the mounting shell (201), of the connecting disc (23) is provided with a flow guide groove (231), the flow guide groove (231) is communicated with the inside of the mounting shell (201), and an injection hole (232) communicated with the flow guide groove (231) is formed in the outer wall of the connecting disc (23).

Technical Field

The application relates to the technical field of deep-well pumps, in particular to a motor structure and a permanent-magnet deep-well pump.

Background

The deep well pump is characterized in that a motor and a pump are integrated into a whole, the deep well pump is immersed in an underground well for pumping and conveying water, and is widely applied to farmland drainage and irrigation, industrial and mining enterprises, urban water supply and drainage, sewage treatment and the like.

Because the motor of the deep-well pump is submerged in water at the same time, when the deep-well pump is immersed in water, the water pressure borne by the motor is high, water outside the deep-well pump permeates into the motor, and the water can be contacted with the coil of the stator to influence the operation of the motor to be improved.

Disclosure of Invention

In order to solve the problem that water permeates into the interior of a motor to influence operation, the application provides a motor structure and a permanent magnet deep-well pump.

The application provides a motor structure adopts following technical scheme:

a motor structure comprises a machine shell, wherein a rotor and a stator are arranged in the machine shell, a shielding sleeve is arranged in the machine shell and divides the interior of the machine shell into an inner cavity and an outer cavity, the stator is positioned in the outer cavity, and the outer cavity is filled with epoxy resin; the rotor is positioned in the inner cavity and is rotationally connected with the shell, and a gap is reserved between the rotor and the inner wall of the shielding sleeve.

Through above-mentioned technical scheme, divide inner chamber and outer cavity with the casing through the housing sleeve, the stator is located outer cavity and keeps apart through epoxy to completely isolated the condition of water infiltration back and the coil contact of stator in the casing, thereby make holistic use more stable.

Optionally, the rotor is a permanent magnet rotor, the rotor includes an iron core and a rotating shaft fixed on the iron core, the outer wall of the iron core includes a shielding layer, and a gap between the rotor and the inner wall of the shielding sleeve is 3-3.5 mm.

Through the technical scheme, the gap of 3-3.5mm is reserved, so that the rotor is more convenient and stable to install, and in addition, the permanent magnet rotor runs through magnetic force, the condition that a conducting wire is in contact with water in the winding type rotor is reduced, and the running of the rotor is better. At iron core outer wall cladding shielding layer, further form completely cut off through the shielding layer, reduce the influence to permanent magnet rotor, make whole use more stable. Meanwhile, the integral waterproof performance is better, the gap is controlled to be 3-3.5mm, and the assembly and disassembly are convenient.

Optionally, an installation hole is formed in one axial end of the casing, the installation hole is communicated with the inner chamber, and an installation groove is further formed in the casing, is located at one end, far away from the inner chamber, of the installation hole, and is coaxially arranged with the installation hole;

the mounting groove is provided with an aligning piece, and the aligning piece comprises an adjusting ring embedded in the mounting groove and a first friction ring sleeved on the rotating shaft and rotating with the adjusting ring; the adjustable ring is in clearance fit with the mounting groove.

Through above-mentioned technical scheme, set up adjustable ring and friction ring one, the clearance fit through adjustable ring and mounting groove makes the position of adjustable ring finely tune as required to realize the effect of pivot self-aligning, in addition, realize the pivot through friction ring one and be connected with the rotation of adjustable ring, thereby make holistic life more lasting.

Optionally, the mounting groove is in threaded connection with a locking ring, the locking ring is used for limiting the adjusting ring to be separated from the mounting groove, and a gap of 0.1-0.2mm is reserved between the locking ring and the adjusting ring;

the rotating shaft penetrates out of the locking ring, one end, far away from the adjusting ring, of the locking ring is provided with a sand blocking groove, a sand blocking ring is arranged in the sand blocking groove, and the rotating shaft is sleeved with the sand blocking ring;

the locking ring is close to the one end of adjustable ring and has seted up the seal groove, be equipped with the sealing member in the seal groove, just the sealing member cover is located the pivot.

Through the technical scheme, the locking ring is used for positioning, the gap of 0.1-0.2mm is reserved, the adjusting ring can swing to perform self-adjustment in the self-aligning process, the self-aligning effect is better, and the rotating shaft of the motor rotates more stably.

Optionally, one end of the casing, which is far away from the aligning member, is provided with a positioning hole, the positioning hole is communicated with the inner chamber, and the positioning hole is provided with a positioning seat; the end face, far away from the inner cavity, of the positioning seat is provided with a through hole, the rotating shaft extends into the through hole and is rotatably connected with the positioning seat, and the end part, close to the inner cavity, of the positioning seat is provided with a thrust disc assembly; the thrust disc assembly comprises a thrust seat arranged on the positioning seat, a plurality of adjusting blocks arranged at one end of the thrust seat far away from the positioning seat and a support ring arranged at one end of the adjusting blocks far away from the thrust seat;

the adjusting blocks are uniformly distributed in the circumferential direction along the axis of the rotating shaft, each adjusting block comprises a touch plate, a positioning block fixed at one end, close to the thrust seat, of the touch plate and a convex ball fixed at one end, far away from the touch plate, of the positioning block, a containing groove is correspondingly formed in one end, far away from the positioning seat, of the thrust seat, and the positioning block is located in the containing groove and realizes overturning adjustment of the touch plate through the convex ball;

the pivot is located to the support ring cover, the support ring is contradicted in each conflict board near the one end of regulating block, the one end that the regulating block was kept away from to the support ring is contradicted in the axial terminal surface of iron core.

Through above-mentioned technical scheme, set up the thrust disk subassembly, the rotation of thrust disk subassembly on the one hand is fixed a position, and the protruding point contact through the regulating block makes the support ring more steady with the conflict of regulating block simultaneously, further promotes pivot pivoted concentricity to make the rotation of pivot more stable. The aligning effect of combining the aligning piece, when the pivot rotated at a high speed, the thrust disc subassembly rotated the rotor and supported and tended to stably, and the aligning piece corresponds realization aligning this moment, further made the pivot rotate its rotation axis's after the position more stable. In addition, based on the fact that the clearance between the rotor and the inner wall of the shielding sleeve is 3-3.5mm, the friction between the rotor and the shielding sleeve is reduced in the self-aligning process of the rotating shaft, and the whole operation is more stable.

Optionally, the end face of the positioning seat close to the thrust seat is provided with a positioning part, and the outer diameter of the positioning part gradually decreases towards the direction close to the thrust seat; the end surface of the thrust seat close to the positioning seat is provided with a positioning groove for embedding and positioning the positioning part; the end face of the positioning portion, which is close to the thrust seat, is also provided with a limiting groove, and the end face of the thrust seat, which is close to the positioning portion, is provided with a limiting block embedded into the limiting groove.

Through above-mentioned technical scheme, set up location portion and constant head tank, fix a position thrust bearing through location portion and constant head tank cooperation, when the pivot supports tight support ring, the thrust bearing supports tightly in location portion, makes the relative position of thrust bearing and location portion more accurate this moment, further strengthens the location of circumference through stopper and spacing groove in addition, reduces thrust bearing circumferential direction to make the use of regulating block more stable.

Optionally, one end of the positioning seat, which is far away from the inner chamber, is provided with a groove, the groove is communicated with the inner chamber, the groove is used for supplying oil to the crusty pancake to be installed, the crusty pancake has elasticity, and the groove is covered after the crusty pancake is installed.

Through above-mentioned technical scheme, set up the recess, realize keeping apart through the crusty pancake mounting groove, after the deep-well pump is put into the aquatic, realize inner chamber and outer chamber pressure balance through crusty pancake deformation to reduced the condition that external water got into the inner chamber, makeed holistic operation more stable.

The application still provides a permanent magnetism deep-well pump, including the aforesaid arbitrary a motor structure, still include the pump water subassembly, the pump water subassembly include with rotor coaxial coupling's impeller and set up in the casing and overlap the pump jacket of establishing the impeller.

Through above-mentioned technical scheme, drive the impeller through motor structure and rotate, the operation of motor is more stable to make the rotation of impeller more stable, make holistic operation more stable.

The application also discloses a permanent magnet deep-well pump, which comprises any one of the motor structures and a water pumping assembly, wherein the water pumping assembly comprises an impeller coaxially connected with the rotor and a pump sleeve which is arranged on the casing and sleeved with the impeller;

the frequency conversion component comprises an installation shell arranged on the shell and a frequency converter arranged in the installation shell; the frequency converter is electrically connected with the stator; epoxy resin is also filled in the mounting shell.

Through the technical scheme, the rotating speed of the motor is controlled through the frequency converter, so that the deep-well pump is more flexible and convenient to use. In addition, through installing the converter in the installation shell, then further keep apart through filling epoxy to make the water-proof effects of converter better, thereby make holistic operation more stable.

Optionally, a connecting disc is further disposed between the casing and the mounting shell, one end of the connecting disc covers the casing, and the other end of the connecting disc covers the mounting shell; the crusty pancake comprises a connecting plate, an inner cavity, a crusty pancake body, a compensation hole and a sealing ring, wherein the end, close to the shell, of the connecting plate is provided with a mounting cavity, the mounting cavity is communicated with the inner cavity, the mounting cavity is internally provided with the crusty pancake body, the crusty pancake body has elasticity, the mounting cavity is divided into two cavities by the crusty pancake body, the mounting cavity is communicated with the compensation hole, and the compensation hole is communicated with the cavity, far away from the;

the one end that the connection pad is close to the installation shell is equipped with the guiding gutter, the guiding gutter with the inside intercommunication of installation shell, the filling hole with the guiding gutter intercommunication is seted up to the outer wall of connection pad.

Through above-mentioned technical scheme, set up the connection pad, the connection pad sets up the crusty pancake and compensates the hole, when the deep-well pump is located under water, realizes inner chamber and external pressure balance through crusty pancake deformation to reduced and leaded to the condition that external water enters into inner chamber because of the pressure differential, thereby made holistic use more stable. The filling hole can be used for injecting epoxy resin into the mounting shell, so that the operation of injecting the epoxy resin into the mounting shell is more convenient.

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

(1) by arranging the shielding sleeve, the condition that water is contacted with the coil of the stator after permeating into the shell is completely isolated, so that the integral use is more stable;

(2) the self-aligning effect of the rotating shaft is realized by arranging the aligning piece, so that the rotating shaft can rotate more stably;

(3) through setting up the thrust disc subassembly, further promote the pivoted concentricity of pivot for the rotation of pivot is more stable.

Drawings

FIG. 1 is a schematic cross-sectional view of a motor structure according to an embodiment;

FIG. 2 is a schematic cross-sectional view of a self-aligning member according to an embodiment;

FIG. 3 is an exploded view of the centering member of the embodiment;

FIG. 4 is a schematic cross-sectional view of an embodiment thrust disc assembly configuration;

FIG. 5 is an exploded schematic view of an embodiment thrust disc assembly;

FIG. 6 is a schematic cross-sectional view of an embodiment of a deep-well pump configuration;

FIG. 7 is a schematic cross-sectional view of a land structure of an embodiment;

fig. 8 is an exploded view of the land structure of the embodiment.

Reference numerals: 1. a housing; 11. a sleeve; 12. an upper cover seat; 121. mounting holes; 122. mounting grooves; 13. a lower cover seat; 131. positioning holes; 101. an inner chamber; 102. an outer chamber; 2. a rotor; 21. an iron core; 22. a rotating shaft; 3. a stator; 4. a shielding sleeve; 5. an alignment member; 51. an adjusting ring; 511. a mounting ring; 512. a necking ring; 613. a rotating ring; 52. a first friction ring; 7. a locking ring; 8. a sand blocking groove; 9. a sand blocking ring; 10. a sealing groove; 14. a seal member; 15. positioning seats; 151. a positioning part; 1511. a limiting groove; 152. a through hole; 16. a second friction ring; 17. a groove; 18. a thrust disc assembly; 181. a thrust seat; 1811. positioning a groove; 1812. a limiting block; 1813. accommodating grooves; 182. a support ring; 183. an adjusting block; 1831. a touch plate; 1832. positioning blocks; 1833. a convex ball; 19. a water pumping assembly; 191. an impeller; 192. a pump housing; 1921. a water inlet; 20. a frequency conversion assembly; 201. mounting a shell; 202. a frequency converter; 23. a connecting disc; 231. a diversion trench; 232. an injection hole; 233. a wire guide hole; 234. a mounting cavity; 235. a ring groove; 236. a compensation hole; 24. frying crusty pancake; 241. a ring portion; 242. an extension ring; 243. a sealing part; 25. a support frame; 251. a water through hole; 26. and a clamp spring.

Detailed Description

The present application is described in further detail below with reference to figures 1-8.

The embodiment of the application discloses a motor structure, as shown in fig. 1, comprising a casing 1, a rotor 2 and a stator 3. The casing 1 includes a sleeve 11 having a circular tube shape, an upper cover seat 12 and a lower cover seat 13, wherein the upper cover seat 12 is located at one axial end of the sleeve 11, and the lower cover seat 13 is located at the other axial end of the lower cover seat 13. Still be equipped with the housing 4 in casing 1, housing 4 is no magnetism stainless steel material, and housing 4 is the pipe form and sets up with sleeve 11 is coaxial. One axial end of the shielding sleeve 4 is fixed with the upper cover seat 12 and the other axial end is fixed with the lower cover seat 13, and the inner space of the machine shell 1 is divided into an inner chamber 101 and an outer chamber 102 by the shielding sleeve 4. Stator 3 is fixed in casing 1 and is located outer cavity 102, and in order to further promote water-proof effects, still pack epoxy in outer cavity 102, fill outer cavity 102 through epoxy, after the epoxy solidification, further keep apart stator 3 through epoxy for stator 3's water-proof effects is better.

Rotor 2 is located interior cavity 101 and can rotate for casing 1, and rotor 2 is neodymium iron boron permanent magnet rotor 2, and rotor 2 includes iron core 21 and is fixed in the pivot 22 of iron core 21. The iron core 21 is formed by pressing a plurality of punching sheets, and the neodymium iron boron permanent magnet is embedded in a groove of the punching sheets. In practical production, in order to further insulate the iron core 21, a shielding layer is further included on the outer side of the iron core 21. The shielding layer comprises a ring sleeve arranged on the circumferential outer wall of the iron core 21 in a sleeved mode and two cover plates arranged at two axial ends of the iron core 21. Wherein the ring sleeve and the cover plate are made of non-magnetic stainless steel. Each cover plate is sleeved in the rotating shaft and abuts against the axial end face of the iron core 21, the cover plates are fixed with the rotating shaft 22 in a welding mode, and the peripheral walls of the cover plates are fixed with the ring sleeves in a welding mode to achieve seamless splicing. The ring cover and the two cover plates are spliced and then fixed on the outer side of the iron core 21, the iron core 21 is coated to realize isolation, and the effect of isolating and protecting the punching sheet of the iron core 21 and the neodymium iron boron permanent magnet is achieved. A gap is reserved between the rotor 2 and the inner wall of the shielding sleeve 4, and the gap between the circumferential outer wall of the iron core 21 of the rotating shaft 22 and the inner wall of the shielding sleeve 4 is controlled to be 3-3.5 mm.

The casing 1 is further provided with an aligning member 5 and a positioning seat 15, one end of the rotating shaft 22 is in running fit with the aligning member 5, and the other end of the rotating shaft 22 is in running connection with the positioning seat 15, and the rotating shaft 22 rotates relative to the casing 1 through the aligning member 5 and the positioning seat 15.

Referring to fig. 2 and 3, a mounting hole 121 is formed in one end of the upper cover seat 12 away from the sleeve 11, and the mounting hole 121 is a circular hole and is communicated with the inner chamber 101. Mounting groove 122 has still been seted up to upper cover seat 12, and mounting groove 122 is the circular slot, and mounting groove 122 is located mounting hole 121 and keeps away from the one end of inner chamber 101 and sets up with mounting hole 121 is coaxial, and the diameter of mounting groove 122 is greater than the diameter setting of mounting hole 121.

The centering member 5 includes an adjusting ring 51 embedded in the mounting groove 122 and a first friction ring 52 sleeved on the rotating shaft 22 and rotating with the adjusting ring 51. The adjusting ring 51 is made of stainless steel, and the adjusting ring 51 includes a mounting ring 511 disposed in the mounting groove 122, a reducing ring 512 coaxially and fixedly connected to the mounting ring 511, and a rotating ring 613 coaxially and fixedly connected to an end of the reducing ring 512 far from the mounting ring 511. The mounting ring 511 is in clearance fit with the mounting groove 122, and the clearance is controlled to be 0.1-0.2mm during actual production. The reducing ring 512 extends towards the direction close to the inner chamber 101, the first friction ring 52 is located in the mounting ring 511, and the first friction ring 52 is made of graphite or ceramic. In actual installation, the rotating shaft 22 is fixed with a limiting ring, and the limiting ring is located at one end of the first friction ring 52 close to the inner chamber 101 and used for limiting the position of the first friction ring 52.

A locking ring 7 is also threadedly attached to the mounting groove 122, the locking ring 7 being located at an end of the adjustment ring 51 remote from the inner chamber 101. The locking ring 7 is provided with a through hole along the axial direction, and the diameter of the through hole is larger than that of the rotating shaft 22 and is used for allowing the rotating shaft 22 to pass through. A gap of 0.1-0.2mm is left between the locking ring 7 and the mounting ring 511 of the adjusting ring 51, so that the adjusting ring 51 can swing in the mounting groove 122 to achieve the self-aligning effect.

The locking ring 7 is kept away from the one end of adjustable ring 51 and has been seted up and has been kept off husky groove 8, keeps off being equipped with in the husky groove 8 and keeps off husky ring 9, keeps off husky ring 9 cover and locates pivot 22, keeps off husky ring 9 and is the rubber material, through keeping off stopping of husky ring 9, reduces in external silt enters into interior chamber 101 through the perforation. One end of the locking ring 7 close to the adjusting ring 51 is provided with a sealing groove 10, a sealing element 14 is arranged in the sealing groove 10, the rotating shaft 22 is sleeved with the sealing element 14, and the sealing element 14 can be a mechanical seal or an oil seal. In actual use, oil is filled in the inner chamber 101 to enhance the lubricating effect, and the sealing effect is further enhanced by the sealing member 14, so that the external water is prevented from entering the inner chamber 101.

Referring to fig. 1 and 4, a positioning hole 131 is formed at an end of the lower cover seat 13 away from the aligning member 5, and the positioning hole 131 is communicated with the inner chamber 101. The positioning seat 15 is fixed on the mounting seat and the positioning seat 15 extends into the positioning hole 131. The end face, far away from the inner chamber 101, of the positioning seat 15 is provided with a through hole 152, the rotating shaft 22 extends into the through hole 152, the rotating shaft 22 is further sleeved with a second friction ring 16, the second friction ring 16 is made of ceramic or graphite, the second friction ring 16 is located in the through hole 152, and the rotating shaft 22 is rotatably connected with the positioning seat 15 through the second friction ring 16. The one end that the positioning seat 15 is kept away from the inner chamber has still seted up recess 17, and recess 17 sets up with through-hole 152 is coaxial and the diameter of recess 17 is greater than the diameter of through-hole 152, and recess 17 passes through-hole 152 and interior chamber 101 intercommunication.

Referring to fig. 4 and 5, the end of the positioning seat 15 near the inner chamber 101 is provided with a thrust disc assembly 18, and the thrust disc assembly 18 includes a thrust seat 181, a support ring 182 and a plurality of adjusting blocks 183. The thrust base 181 is located at an end portion of the positioning base 15 close to the inner chamber 101, a positioning groove 1811 is formed in an end surface of the thrust base 181 close to the positioning base 15, the positioning groove 1811 is a circular truncated cone groove, and the diameter of the positioning groove 1811 gradually decreases toward a direction close to the bottom of the groove. The end face of the positioning seat 15 close to the thrust seat 181 is provided with a positioning portion 151, and the positioning portion 151 and the positioning seat 15 are integrally provided. The outer diameter of the positioning portion 151 is gradually reduced toward the thrust seat 181, and the positioning portion 151 is shaped to correspond to the positioning groove 1811.

Spacing groove 1511 has still been seted up to the terminal surface that location portion 151 is close to thrust bearing 181, and spacing groove 1511 is provided with threely, and three spacing groove 1511 is circumference evenly distributed along the axis of pivot 22. Each of the retaining grooves 1511 penetrates the positioning portion 151 toward one end away from the axis of the rotating shaft 22. The end surface of the thrust base 181 close to the positioning portion 151 is fixed with limiting blocks 1812, the number of the limiting blocks 1812 is the same as that of the limiting grooves 1511, and the positions of the limiting blocks are arranged in a one-to-one correspondence manner, and the limiting blocks 1812 are used for being embedded into the corresponding limiting grooves 1511 to limit the axial rotation of the thrust base 181.

The thrust base 181 is far away from the one end of positioning seat 15 and is seted up holding tank 1813 correspondingly, and holding tank 1813 is seted up threely, and three holding tank 1813 is the circumference evenly distributed along the axis of rotation of pivot 22.

The adjusting blocks 183 are three, the three adjusting blocks 183 are circumferentially and uniformly distributed along the axis of the rotating shaft 22, and the three adjusting blocks 183 and the three accommodating grooves 1813 are arranged in a one-to-one correspondence manner. Each adjusting block 183 includes a contact plate 1831, a positioning block 1832 fixed to one end of the contact plate 1831 close to the thrust block 181, and a convex ball 1833 fixed to one end of the positioning block 1832 far from the contact plate 1831. The positioning block 1832 is located in the receiving groove 1813 and has a larger gap with the inner wall of the receiving groove 1813, the protruding ball 1833 protrudes from the end surface of the positioning block 1832 and abuts against the bottom of the receiving groove 1813, and a gap is left between the abutting plate 1831 and the thrust seat 181, so that the abutting plate 1831 can swing within a certain range along the protruding ball 1833, thereby realizing the turning adjustment of the abutting plate 1831.

The support ring 182 is made of graphite, the support ring 182 is sleeved on the rotating shaft 22 and located at one end of the adjusting block 183 far away from the thrust seat 181, the end surface of the support ring 182 close to the adjusting block 183 abuts against the abutting plate 1831 of each adjusting block 183 and forms surface contact, and the end surface of the support ring 182 far away from the adjusting block 183 abuts against the axial end surface of the iron core 21.

During the in-service use, the motor is vertical state, and the pivot 22 of motor rotates through two 16 and positioning seat 15 of friction ring and is connected, fixes a position to rotor 2 through the support of thrust disc subassembly 18 this moment, thereby the regulating block 183 of thrust disc subassembly 18 can contradict support ring 182 according to the running situation of reality and support rotor 2 to it is better to make pivot 22 pivoted concentricity. The self-aligning function of the aligning piece 5 can be adapted according to the rotation condition of the rotating shaft 22, so that the condition that the rotating shaft 22 rotates to cause vertical radial thrust is reduced, and the rotating concentricity is better.

The working principle of the embodiment is as follows:

when the motor structure is adopted, the shell 1 is divided into the inner chamber 101 and the outer chamber 102 through the shielding sleeve 4, and the stator 3 is positioned in the outer chamber 102 and is isolated through epoxy resin, so that the condition that water is contacted with a coil of the stator 3 after penetrating into the shell 1 is reduced. In addition, through the matching of the thrust disc assembly 18 and the aligning member 5, the rotating concentricity of the rotating shaft 22 is better, and the gap between the rotor 2 and the inner wall of the shielding sleeve 4 is 3-3.5mm, so that the friction condition between the rotor 2 and the shielding sleeve 4 is reduced in the self-aligning process of the rotating shaft 22, and the running of the motor is more stable and durable.

The embodiment of the application also discloses a permanent magnet deep well pump, referring to fig. 6, and on the basis of the motor structure, the permanent magnet deep well pump further comprises a water pumping assembly 19, wherein the water pumping assembly 19 comprises an impeller 191 and a pump sleeve 192, the impeller 191 is coaxially and fixedly connected with the rotating shaft 22 of the rotor 2, and a plurality of impellers 191 are axially distributed. The pump sleeve 192 is coaxially fixed to the casing 1 and is sleeved on the plurality of impellers 191, and a water inlet 1921 is formed at one end of the pump sleeve 192 close to the casing 1. The rotation of the shaft 22 drives the plurality of impellers 191 to rotate, thereby realizing the water pumping operation.

In order to control the rotation speed of the motor conveniently, the motor structure is further connected with a frequency conversion assembly 20. The variable frequency assembly 20 includes a mounting housing 201 and a frequency converter 202. Wherein, a connecting disc 23 is fixed at one end of the machine shell 1 far away from the water pumping assembly 19, the mounting shell 201 is cylindrical, one end of the opening of the mounting shell is fixed on the connecting disc 23, and the mounting shell 201 is connected with the machine shell 1 through the connecting disc 23.

Referring to fig. 7 and 8, one end of the connecting disc 23 covers the groove 17 of the motor and the other end covers the opening of the mounting shell 201, and the connecting disc 23 is fixedly connected with the positioning seat 15 of the motor and the mounting shell 201 through welding. One end of the connecting disc 23 close to the mounting shell 201 is provided with a flow guide groove 231, the flow guide groove 231 is communicated with the inside of the mounting shell 201, and the outer wall of the connecting disc 23 is provided with an injection hole 232 communicated with the flow guide groove 231.

The frequency converter 202 is located in the installation shell 201, and the frequency converter 202 is electrically connected with the winding of the stator 3, so that the power supplied by the power supply can flow to the stator 3 after passing through the frequency converter 202, and the rotation speed of the motor can be adjusted by controlling the frequency converter 202. The bottom of the guiding groove 231 is further provided with a wire hole 233, and the connecting wires of the frequency converter 202 and the stator 3 can be wired through the wire hole 233. In order to enhance the waterproof effect, the installation shell 201 is filled with epoxy resin, and the frequency converter 202 is coated with the epoxy resin to realize isolation. Epoxy resin is injected into the guide groove 231 through the injection hole 232 and fills the inside of the mounting case 201. After the epoxy resin is injected, the injection hole 232 can be plugged by screwing a locking bolt into the injection hole 232.

One end of the connecting disc 23 close to the casing 1 is provided with a mounting cavity 234, and the mounting cavity 234 is communicated with the inner chamber 101 through the groove 17. The pancake 24 is arranged in the mounting cavity 234, the pancake 24 is elastic, the pancake 24 divides the mounting cavity 234 into two chambers, the mounting cavity 234 is communicated with a compensation hole 236, and the compensation hole 236 is communicated with the chamber of the pancake 24, which is far away from the shell 1.

During actual installation, an annular groove 235 is formed in the installation cavity 234, the pancake 24 is made of rubber, and the pancake 24 comprises a ring portion 241 embedded in the annular groove 235, an extension ring 242 fixedly connected to the ring portion 241 and a sealing portion 243 fixed to the extension ring 242 and far away from the ring portion 241. The extension ring 242 extends and tapers away from the bottom of the mounting cavity 234, and the sealing portion 243 is recessed toward the bottom of the mounting cavity 234 from the outer periphery to the center.

The supporting frame 25 is further arranged in the ring groove 235, the supporting frame 25 is positioned on one side of the pancake 24 close to the cavity bottom of the mounting cavity 234, a gap for supplying the deformation of the pancake 24 is reserved between the supporting frame 25 and the pancake 24, and a water through hole 251 is further formed in the end face of the supporting frame 25 far away from the pancake 24. The clamp spring 26 is further arranged at one end of the support frame 25 far away from the pancake 24, the clamp spring 26 is clamped in the ring groove 235, and the clamp spring 26 abuts against the support frame 25 and the ring portion 241 of the pancake 24, so that the pancake 24 is stably fixed at the ring groove 235.

In practical use, when the deep-well pump runs underwater, water enters the mounting cavity 234 through the compensation hole 236 and contacts with the crusty pancake 24 through the water through hole 251, and the pressure of the inner cavity 101 and the outside can be balanced through the deformation of the crusty pancake 24, so that the condition that water permeates into the motor is reduced.

Alternatively, the frequency converter 202 can also be externally arranged, at the moment, the structure of the connecting disc 23 is not needed, the shell 201 is not needed, and when the device is actually used, the crusty pancake 24 can be directly arranged at the groove 17 to cover the groove 17, and the pressure of the inner chamber 101 and the outside can be balanced through the elasticity of the crusty pancake 24.

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.