CN218041018U - Bearing device and motor - Google Patents

Abstract

The embodiment of the utility model discloses bearing device and motor, bearing device include first bearing frame, first slide bearing, first annular elastic component, first bearing frame central authorities are equipped with first bearing hole, first bearing hole is used for holding first slide bearing, first annular elastic component cover is established outside first slide bearing, first annular elastic component block is in the inner wall in first bearing hole with between the first slide bearing, first annular elastic component is used for the buffering first slide bearing's radial force. The utility model provides an among the prior art the first bearing seat of thrust that floats have the problem that the part is many, the assembly precision is high, the technology is complicated.

Description

Bearing device and motor

Technical Field

The utility model relates to a dive direct current motor's technical field especially relates to a bearing device and motor.

Background

The submersible electric pump is a water pump in which a pump body and a submersible motor connected with the pump body are submerged to work, the submersible motor is an important component of the submersible electric pump, and the submersible motor is of a dry type (the motor is totally sealed), a semi-dry type (the stator of the motor is sealed, and the rotor runs in water), an oil-filled type (the interior of the motor is filled with oil to prevent water from invading into a winding) and a wet type (the interior of the motor is filled with water, and the stator and the rotor all run in water).

During operation, the pump body can generate eccentric lateral force, the pump body is connected with a shaft of the motor, and further, the shaft can receive radial eccentric lateral force given by the pump body. Generally, a conventional submersible direct current motor employs a floating thrust bearing seat to adjust and balance a radial force of a shaft, and the floating thrust bearing seat includes a balance disc, a spherical jackscrew and a bearing seat body. The bearing seat body is placed on the balance disc, and the spherical jackscrew is clamped between the balance disc and the bearing seat body. The floating thrust bearing seat has the problems of multiple parts, high assembly precision requirement and complex process.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a bearing device and motor for solve among the prior art floating thrust bearing seat and have the problem that the part is many, the assembly precision is high, the technology is complicated.

In a first aspect, the utility model provides a bearing device, including first bearing frame, first slide bearing, first annular elastic component, first bearing frame central authorities are equipped with first bearing hole, first bearing hole is used for holding first slide bearing, first annular elastic component cover is established outside first slide bearing, first annular elastic component block is in the inner wall in first bearing hole with between the first slide bearing, first annular elastic component is used for the buffering first slide bearing's radial force.

Preferably, the outer wall of the first sliding bearing is provided with a first annular groove for accommodating the first annular elastic member.

Preferably, the first annular elastic member is an elastic rubber ring.

Preferably, the bearing device further comprises a support pipe, a second through hole for a shaft to pass through is formed in the center of the support pipe, the support pipe is arranged on one side of the first bearing seat and connected with the first bearing seat, the support pipe and the first bearing seat are coaxially arranged, the support pipe is fixedly connected with the shaft, and the support pipe rotates along with the shaft.

Preferably, the bearing device further includes a spacer provided between the support tube and the first bearing seat, the spacer being for anti-friction.

Preferably, the first bearing seat is provided with a first mounting hole;

a second mounting hole is formed in the gasket, and the position of the second mounting hole is opposite to that of the first mounting hole;

the bearing device further comprises an insert, and two ends of the insert are respectively accommodated in the first mounting hole and the second mounting hole, so that the first sliding bearing is fixedly connected with the gasket.

Preferably, a third through hole extending along the axial direction of the first bearing seat is further formed in the first bearing seat, the third through hole is used for accommodating a balance valve, and the balance valve is used for balancing the difference between the internal hydraulic pressure and the external hydraulic pressure of the motor.

In a second aspect, the present invention provides an electric machine comprising a bearing arrangement as described above.

Preferably, the motor further includes a rear end cap, the bearing device fixedly connected to the rear end cap, a stator assembly disposed on a side of the bearing device away from the rear end cap, a shaft penetrating through the stator assembly and the bearing device, and a front cap accommodating the stator assembly and fixedly connected to the bearing device, wherein the stator assembly is fixedly connected to the front cap, and the stator assembly generates a rotating magnetic field to rotate the driving shaft.

Preferably, a shaft sleeve protrudes from the center of the end part of the front cover, which is far away from the rear end cover, to the direction far away from the rear end cover, a shaft hole for the shaft to extend out is formed in the end part of the shaft sleeve, one end of the shaft extends into the bearing device, and the other end of the shaft penetrates through the shaft hole and is positioned outside the motor;

the motor further comprises a second sliding bearing arranged on one side, far away from the bearing device, of the stator assembly and a second annular elastic member sleeved on the second sliding bearing, the second sliding bearing is installed in the shaft sleeve, the second annular elastic member is clamped between the second sliding bearing and the shaft sleeve, and the second annular elastic member is used for buffering the radial force of the second sliding bearing.

Implement the embodiment of the utility model provides a, will have following beneficial effect:

the embodiment of the utility model simplifies the bearing seat structure by replacing the floating thrust bearing seat in the prior art with the fixed first bearing seat; through establishing first annular elastic component at first slide bearing overcoat, make first annular elastic component block between first bearing frame and first slide bearing, first annular elastic component can cushion first slide bearing's radial force, first annular elastic component's effect is the same with prior art's the effect of the thrust bearing frame that floats, the bearing device overall structure of this application is simple, the assembly of being convenient for, it has many, the assembly precision is high, the complicated problem of technology to have solved current unsteady thrust bearing frame and have the part.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Wherein:

fig. 1 is a top view of a bearing assembly according to an embodiment of the present invention;

FIG. 2 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;

FIG. 4 is an enlarged view of the portion C of FIG. 3;

FIG. 5 is an exploded view of the first slide bearing and first annular resilient member of FIG. 1;

fig. 6 is a schematic structural diagram of a motor according to an embodiment of the present invention;

FIG. 7 is a top view of the motor structure of FIG. 6;

FIG. 8 is a cross-sectional view taken along line D-D of FIG. 7;

fig. 9 is a top view of a plastic front cover of a motor according to an embodiment of the present invention;

FIG. 10 is a cross-sectional view taken along the line E-E in FIG. 9;

fig. 11 is an enlarged view of the portion F in fig. 10.

Description of the main element symbols:

110. a front cover; 120. a bolt mounting seat; 130. a framework oil seal; 140. a clamp spring; 150. a protective cap; 160. a power supply hole; 210. a rear end cap; 220. a first bearing housing; 221. a first sliding bearing; 222. a first annular elastic member; 2221. an elastic rubber ring; 223. a first bearing hole; 224. a first annular groove; 226. a balancing valve; 227. a third through hole; 228. a fourth mounting hole; 230. a gasket; 233. a carbocyclic ring; 234. a hole; 240. supporting a tube; 250. a plug-in; 260. a second sliding bearing; 261. a second annular elastic member; 270. a second annular groove; 280. a partition plate; 290. a diaphragm; 300. a shaft; 400. a stator assembly; 500. a shaft sleeve; 600. a shaft hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as up, down, left, right, front, back \8230;) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the attached drawings), and if the specific posture is changed, the directional indicators are correspondingly changed.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

Referring to fig. 1 to 5, a bearing device according to an embodiment includes a first bearing seat 220, a first sliding bearing 221, and a first annular elastic member 222, wherein a first bearing hole 223 is formed in a center of the first bearing seat 220, the first bearing hole 223 is used for accommodating the first sliding bearing 221, the first annular elastic member 222 is sleeved outside the first sliding bearing 221, the first annular elastic member 222 is clamped between an inner wall of the first bearing hole 223 and the first sliding bearing 221, and the first annular elastic member 222 is used for buffering a radial force of the first sliding bearing 221.

The bearing seat structure is simplified by replacing the floating thrust bearing seat of the prior art with a fixed first bearing seat; through establishing first annular elastic component at first slide bearing overcoat, make first annular elastic component block between first bearing frame and first slide bearing, first annular elastic component can cushion first slide bearing's radial force, first annular elastic component's effect is the same with prior art's the effect of unsteady thrust bearing frame, the bearing device overall structure of this application is simple, the assembly of being convenient for, has solved current unsteady thrust bearing frame and has had the problem that the part is many, the assembly precision is high, the technology is complicated.

In this embodiment, the first bearing seat 220 is made of plastic, which facilitates reducing cost and completing machining at all positions by one-time clamping in lathe machining.

In some embodiments, the first bearing hole 223 is machined with a small diameter hole in the bore, which is smaller than the outer diameter of the first sliding bearing 221. When the first sliding bearing 221 is assembled, the first bearing hole is heated, the first sliding bearing 221 is pressed into the first sliding bearing hole by a press, and after the temperature cools, the bearing will not fall out of the first bearing seat 220.

In some embodiments, referring to fig. 2 to 5, a first annular groove 224 is formed on an outer wall of the first sliding bearing 221, and the first annular groove 224 is used for accommodating the first annular elastic member 222, so that the first annular groove 224 is better clamped between the first bearing hole 223 and the first sliding bearing 221, and is not easy to fall off.

The number of the first annular grooves 224 matches the number of the first annular elastic members 222, in this embodiment, the number of the first annular grooves 224 is 3, the number of the first annular grooves 224 is not specifically limited in this application, and in other embodiments, the number of the first annular grooves 224 may be 1, 2 or more than 4, which depends on the magnitude of the radial force applied to the first sliding bearing 221 by the shaft.

In some embodiments, the first annular elastic member 222 is an elastic rubber ring 2221. The elastic rubber ring 2221 is used mainly for reducing the radial force given to the first bearing hole 223 by the first sliding bearing 221, and avoiding excessive wear of the first bearing hole 223.

In some embodiments, referring to fig. 8, the bearing device further includes a support pipe 240, a second through hole for the shaft to pass through is formed in the center of the support pipe 240, the support pipe 240 is disposed at one side of the first bearing seat 220, the support pipe 240 is connected to the first bearing seat 220, and the support pipe 240 and the first bearing seat 220 are coaxially disposed. The support tube 240 is fixedly connected to the shaft, and the support tube 240 rotates with the shaft. In this embodiment, the fixed connection is achieved through a shrink fit process, which is a process of utilizing the principle of expansion with heat and contraction with cold to achieve the purpose of interference fit of parts to be connected. In some embodiments, the pressing process may be selected to fixedly connect the support tube 240 to the shaft.

Referring to fig. 8, the bearing device further includes a spacer 230 disposed between the support tube 240 and the first bearing seat 220, the spacer 230 being used for anti-friction. When the motor rotates, the shaft drives the support tube 240 to move, and the support tube 240 rubs against the pad 230. Specifically, a first through hole for the shaft to pass through is formed in the center of the spacer 230, and the spacer 230 is disposed on one side of the first bearing seat 220.

In some embodiments, referring to fig. 8, the bearing device further includes an insert 250, the first bearing seat 220 is provided with a first mounting hole, the gasket 230 is provided with a second mounting hole, the position of the second mounting hole is opposite to the position of the first mounting hole, and two ends of the insert 250 are respectively received in the first mounting hole and the second mounting hole, so that the first sliding bearing 221 is fixedly connected to the gasket 230.

In the present embodiment, please refer to fig. 8, the number of the second mounting holes is 2, and the second mounting holes are uniformly distributed on the gasket 230, where the number of the second mounting holes is not specifically defined, and in some embodiments, the number of the second mounting holes is 2, or more.

In this embodiment, the insert 250 is a pin, and a cylindrical pin top or a conical pin can be used as the pin.

In the present embodiment, the gasket 230 is a carbon ring 233.

In some embodiments, the gasket 230 includes a step-shaped engaging portion, a fastening mating portion is disposed on the first bearing seat 220 and is fastened with the step-shaped engaging portion, and the gasket 230 is fastened with the first bearing seat 220, so that the gasket 230 and one side of the first bearing seat 220 are tightly combined.

In some embodiments, referring to fig. 8, the spacer 230 has a hole 234 on a side thereof near the support tube 240 for reducing frictional resistance with the support tube 240.

In the present embodiment, the number of the holes 234 is 6 and the holes are uniformly distributed on the carbon ring 233. The number of holes 234 is not specifically defined herein and may be greater in some embodiments. This is mainly determined by the magnitude of the frictional resistance between the support tube 240 and the shaft.

In some embodiments, the bearing device further comprises a balance valve 226, wherein the balance valve 226 is used for balancing the difference between the internal hydraulic pressure and the external hydraulic pressure of the motor, and when the water pressure in the motor is smaller than the external water pressure, the balance valve 226 is automatically opened to feed water into the motor. In some embodiments, the balancing valve 226 may be a self-operated differential pressure balancing valve 226. In this embodiment, there is one balancing valve 226, and in some embodiments, there may be 2 balancing valves or more than 2 balancing valves, which are not specifically limited herein, and the number of the balancing valves 226 mainly depends on the magnitude of the difference between the internal pressure and the external pressure of the working environment in which the motor is located. The first bearing housing 220 is further provided with a third through hole 227 extending axially along the first bearing housing 220, and the balance valve 226 is accommodated in the third through hole 227.

Another embodiment of an electric machine includes the bearing device described above.

In some embodiments, referring to fig. 8, the motor includes a rear cover 210, a bearing device fixedly connected to the rear cover 210, a stator assembly 400 disposed on a side of the bearing device facing away from the rear cover 210, a shaft 500 penetrating the stator assembly and the bearing device, and a front cover 110 accommodating the stator assembly and fixedly connected to the bearing device, wherein the stator assembly 400 is fixedly connected to the front cover 110, and the stator assembly 400 generates a rotating magnetic field to drive the shaft to rotate.

In some embodiments, referring to fig. 6, 8 and 10, a shaft sleeve 500 protrudes from the center of the end of the front cover 110 far from the rear cover 210 in a direction far from the rear cover 210, the end of the shaft sleeve 500 is provided with a shaft hole 600 for a shaft to protrude, one end of the shaft 300 extends into the bearing device, and the other end of the shaft 300 passes through the shaft hole 600 and is located outside the motor.

In some embodiments, referring to fig. 8, the motor further includes a second sliding bearing 260 disposed on a side of the stator assembly 400 away from the bearing device, and a second annular elastic member 261 sleeved on the second sliding bearing 260, the second sliding bearing 260 is mounted in the shaft sleeve 500, the second annular elastic member 261 is clamped between the second sliding bearing 260 and the shaft sleeve 500, the second annular elastic member 261 is used for relieving a radial force of the second sliding bearing 260, both the second sliding bearing 260 and the first sliding bearing 221 can buffer the radial force of the shaft, and the second sliding bearing 260 and the first sliding bearing 221 are disposed on both sides of the stator assembly 400, respectively, so that the output of the shaft is more stable and reliable.

In some embodiments, referring to fig. 10 and 11, a second annular groove 270 is disposed on an outer wall of the second sliding bearing 260, and the second annular groove 270 is used for accommodating the second annular elastic member 261. The number of the second annular grooves 270 matches the number of the second annular elastic members 261, which is 3 in the present embodiment, and is not particularly limited, and may be 1 or 2 in some embodiments, depending on the magnitude of the radial force applied to the second sliding bearing 260 by the shaft.

In some embodiments, the second annular elastic member 261 is an elastic rubber ring 2221. The elastic rubber ring 2221 is mainly used to reduce the radial force applied to the second bearing hole by the second sliding bearing 260 and to prevent the first bearing hole 223 from being excessively worn.

In some embodiments, referring to fig. 8, the motor further includes a snap spring 140, the snap spring 140 is used to limit the shaft and the second sliding bearing 260 in the front cover 110, so as to prevent the shaft and the second sliding bearing 260 from sliding out of the shaft hole 600, so as to facilitate fixing the second sliding bearing 260 of the motor to improve the stability of the output of the shaft, and a third annular groove is provided on the inner wall of the shaft sleeve 500 and is used to accommodate the snap spring 140.

In some embodiments, referring to fig. 8, the motor further includes a sealing member for isolating the external environment, and having waterproof, dustproof and anti-contamination effects. A fourth annular groove is provided in the inner wall of the shaft sleeve 500 adjacent the second sleeve bearing 260 for receiving a seal.

The seal in this embodiment is a backbone oil seal 130.

In some embodiments, referring to fig. 6 and 8, the motor further includes a protective cap 150, wherein the protective cap 150 is used for clamping a side of the shaft sleeve 500 away from the rear end cap 210, and is used for isolating the intrusion of external factors into the motor.

In some embodiments, the protective cap 150 is made of rubber, the protective cap 150 is fixedly connected to the shaft, and the protective cap 150 is linked with the shaft when the motor rotates.

In some embodiments, the motor further includes a bolt mounting base 120, and the bolt mounting base 120 is disposed around the shaft sleeve 500, and in this embodiment, the number of the bolt mounting bases 120 is 4, and the bolt mounting bases are used in cooperation with a pump body to be connected with the motor.

In some embodiments, referring to fig. 7 and 9, the front cover further has a power hole 160.

In some embodiments, a third mounting hole is formed in the rear end cover 210, a fourth mounting hole 228 and a sixth mounting hole are formed in the first bearing seat 220, a fifth mounting hole is formed in the stator assembly 400, the third mounting hole corresponds to the fourth mounting hole 228 in position, the fifth mounting hole corresponds to the sixth mounting hole in position, the fourth mounting hole 228 and the third mounting hole are matched through screws for fixedly connecting the first bearing seat 220 with the rear end cover 210 and the stator assembly 400, and the sixth mounting hole and the third mounting hole are matched through screws for fixedly connecting the first bearing seat 220 with the stator assembly 400.

In some embodiments, referring to fig. 8, the motor further includes a partition 280 and a diaphragm 290, a receiving groove is formed in a side of the rear end cover 210 facing the first bearing seat 220 for receiving the partition 280 and the diaphragm 290, and the partition 280 is used for preventing external water pressure from pressing the diaphragm 290 into the first bearing seat 220 when the internal and external hydraulic pressure differences of the motor are unbalanced, so as to affect the normal operation of the motor. The diaphragm 290 serves to isolate the interior of the shaft from the rear end cap.

In some embodiments, the side of the rear end cap 210 facing away from the receiving slot is provided with a weight-reducing slot.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention, therefore, all equivalent variations of the present invention are intended to be covered by the present invention.

Claims (10)

1. A bearing device characterized in that: including first bearing frame, first slide bearing, first annular elastic component, first bearing frame central authorities are equipped with first bearing hole, first bearing hole is used for holding first slide bearing, first annular elastic component cover is established outside the first slide bearing, first annular elastic component block is in the inner wall in first bearing hole with between the first slide bearing, first annular elastic component is used for the buffering first slide bearing's radial force.

2. The bearing device according to claim 1, wherein: the outer wall of the first sliding bearing is provided with a first annular groove, and the first annular groove is used for accommodating the first annular elastic component.

3. The bearing device according to claim 2, wherein: the first annular elastic member is an elastic rubber ring.

4. A bearing device according to any one of claims 1 to 3, wherein: the support tube is arranged on one side of the first bearing seat and connected with the first bearing seat, the support tube and the first bearing seat are coaxially arranged, the support tube is fixedly connected with the shaft, and the support tube rotates along with the shaft.

5. The bearing device according to claim 4, wherein: the bearing support device further comprises a gasket arranged between the support pipe and the first bearing seat, and the gasket is used for preventing friction.

6. The bearing device according to claim 5, wherein: the first bearing seat is provided with a first mounting hole;

a second mounting hole is formed in the gasket, and the position of the second mounting hole is opposite to that of the first mounting hole;

the two ends of the plug-in are respectively accommodated in the first mounting hole and the second mounting hole, so that the first sliding bearing is fixedly connected with the gasket.

7. The bearing device according to claim 1, wherein: the first bearing seat is further provided with a third through hole extending along the axial direction of the first bearing seat, the third through hole is used for accommodating a balance valve, and the balance valve is used for balancing the difference between the internal pressure and the external pressure of the motor.

8. An electric machine characterized by: comprising a bearing device according to any one of claims 1-7.

9. The electric machine of claim 8, wherein: the motor also comprises a rear end cover, a bearing device fixedly connected with the rear end cover, a stator assembly arranged on one side of the bearing device, which is far away from the rear end cover, a shaft penetrating through the stator assembly and the bearing device, and a front cover accommodating the stator assembly and fixedly connected with the bearing device, wherein the stator assembly is fixedly connected with the front cover, and the stator assembly generates a rotating magnetic field to drive the rotation of a shaft.

10. The electric machine of claim 9, wherein: a shaft sleeve is protruded from the center of the end part of the front cover, which is far away from the rear end cover, to the direction far away from the rear end cover, a shaft hole for the shaft to extend out is formed in the end part of the shaft sleeve, one end of the shaft extends into the bearing device, and the other end of the shaft penetrates through the shaft hole and is positioned outside the motor;

the motor further comprises a second sliding bearing and a second annular elastic member, the second sliding bearing is arranged on one side, far away from the bearing device, of the stator assembly, the second annular elastic member is sleeved on the second sliding bearing, the second sliding bearing is installed in the shaft sleeve, the second annular elastic member is clamped between the second sliding bearing and the shaft sleeve, and the second annular elastic member is used for buffering the radial force of the second sliding bearing.

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