CN216618274U - Air suspension bearing assembly, motor and air compressor - Google Patents

Abstract

The utility model provides an air suspension bearing assembly, a motor and an air compressor, wherein the air suspension bearing assembly comprises a bearing seat and an air suspension bearing connected to the bearing seat, a heat conducting piece is clamped between the bearing seat and the air suspension bearing, and the heat conducting piece can conduct heat generated by the air suspension bearing due to wind mill to the bearing seat. According to the utility model, the heat conducting piece can timely conduct the heat generated by the air-suspending bearing due to the air mill to the bearing seat, so that the cooling of the bearing is ensured, the heat dissipation capacity of the bearing position is enhanced, and the performance and the reliability of the bearing are improved.

Description

Air suspension bearing assembly, motor and air compressor

Technical Field

The utility model belongs to the technical field of motor design, and particularly relates to an air suspension bearing assembly, a motor and an air compressor.

Background

The motor in the current structure of a dynamic pressure air suspension compressor (air compressor) consists of a rear end cover assembly, a motor shell, a motor stator, a front end cover assembly, a motor rotor, a volute, a radial air bearing, an axial air bearing and an axial bearing seat. The components are fastened together by fasteners such as screws. Wherein, the motor shell contains a cooling water channel, and cooling liquid is introduced during the operation period to cool the whole air compressor.

The radial air bearing is usually fixed on the radial bearing bases of the rear end cover assembly and the front end cover assembly by welding/buckling and the like to form a bearing whole; the axial air bearing is usually fixed by welding/fastening, etc. and the axial bearing seat is formed with an axial bearing whole.

The main defects of the prior art structure are as follows:

(1) the air bearing heat dissipation can not be guaranteed, and the air compressor can cause the heat accumulation inside the whole machine when operating for a long time:

the cooling water channel cannot be arranged at the axial bearing and the radial bearing in the axial bearing seat, and the heat generated by the wind mill loss caused by the high-speed rotation of the rotor at the bearing position is radiated to the shell with the water cooling channel at lower temperature only by the contact of the end covers, so that the heat radiation efficiency is low. If the air compressor runs for a long time, the bearing can only transmit heat to the shell with low temperature by the bearing seat, the distance between the heat transmission process and the water cooling channel of the whole machine is far, the heat exchange efficiency is low, and therefore heat accumulation is generated at the bearing. When the accumulated heat is too high, or the bearing is heated and deformed, the performance and reliability of the whole machine are affected.

(2) Bearing abnormal heating influences motor stator:

in the whole machine structure, the rear end cover assembly and the front end cover assembly are generally directly connected with the water-cooling shell/water-cooling flow channel or are close to the water-cooling flow channel, and the temperature of the rear end cover assembly and the front end cover assembly is low, so that the bearing and the end part of the stator winding are generally radiated by the end cover. When the air compressor runs for a long time, the air bearing continuously generates heat, and because the heat dissipation at the air bearing is insufficient and the air inside the air compressor circulates, a motor stator coil (namely the end part of a stator winding) is continuously conducted by the heat at the bearing, the temperature of the coil is abnormally increased, the running working conditions of the bearing and the stator are greatly influenced, and the instability of work is increased.

In conclusion, the cooling structure of the hollow press in the prior art has the problems that the cooling and the reliability of the bearing position cannot be guaranteed, the cooling effect is poor, the design is improper, the performance of the bearing and the performance of the whole machine are affected, and the like.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides an air suspension bearing assembly, a motor and an air compressor, which can overcome the defects that the air suspension bearing assembly in the prior art lacks a necessary cooling structure, so that the heat generated by air-mill loss of the air suspension bearing cannot be cooled in time, so that the cooling effect of the motor or the air compressor is poor, and the reliability is reduced.

In order to solve the above problems, the present invention provides an air bearing assembly, which includes a bearing seat and an air bearing connected to the bearing seat, wherein a heat conducting member is interposed between the bearing seat and the air bearing, and the heat conducting member can conduct heat generated by the air bearing to the bearing seat.

In some embodiments, a space formed by clamping the air bearing and the bearing seat and a space outside the heat conducting member are filled with heat conducting glue.

In some embodiments, the thermally conductive paste is an epoxy.

In some embodiments, the heat-conducting member has a plurality of heat-conducting members, and the plurality of heat-conducting members are uniformly spaced along a circumferential direction of the air bearing.

In some embodiments, the air bearing is a radial bearing, and the bearing seat is one of a front end cover and a rear end cover of the motor.

In some embodiments, the air bearing is an axial bearing, and the bearing seat is one of a forward axial bearing seat and a rearward axial bearing seat.

In some embodiments, the heat conducting member includes a first heat pipe, a first end of the first heat pipe is in contact connection with the inner ring of the axial bearing, and a second end of the first heat pipe is in contact connection with the outer ring of the front axial bearing seat or the rear axial bearing seat.

In some embodiments, the front and/or rear axial bearing housings are configured with mounting grooves therein, and the first heat pipe is mounted within the mounting grooves.

The utility model also provides a motor comprising the air suspension bearing assembly.

In some embodiments, the electric machine further includes a housing configured with a cooling flow passage therein, and one end of the heat-conducting member is in heat exchange with the cooling flow passage.

The utility model also provides an air compressor which comprises the motor.

According to the air suspension bearing assembly, the motor and the air compressor, the heat conducting piece can conduct heat generated by the air suspension bearing due to the air mill to the bearing seat in time, so that the bearing is cooled, the heat dissipation capacity of the bearing position is enhanced, and the performance and the reliability of the bearing are improved.

Drawings

FIG. 1 is an exploded view of an air bearing assembly according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the air bearing assembly of FIG. 1 after assembly;

FIG. 3 is a schematic view of a portion of an air bearing assembly according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of an air compressor according to another embodiment of the present invention.

The reference numerals are represented as:

1. a radial bearing; 21. a front end cover; 22. a rear end cap; 3. an axial bearing; 41. a front axial bearing seat; 42. a rear axial bearing seat; 51. a first heat pipe; 52. a second heat pipe; 6. installing a groove; 101. a cooling flow channel; 102. a housing; 103. a stator winding end portion; 105. a rotating shaft; 106. a volute.

Detailed Description

With reference to fig. 1 to 4, according to an embodiment of the present invention, an air bearing assembly is provided, which includes a bearing housing and an air bearing connected to the bearing housing, wherein a heat conducting element is interposed between the bearing housing and the air bearing, and the heat conducting element can conduct heat generated by an air bearing at the air bearing to the bearing housing. In the technical scheme, the heat conducting piece can conduct heat generated by the air bearing to the bearing seat in time, so that the bearing is cooled, the heat dissipation capacity of the bearing position is enhanced, and the performance and the reliability of the bearing are improved.

In some embodiments, a space formed by the air bearing and the bearing seat and a space outside the heat conducting member are filled with a heat conducting glue, for example, an epoxy resin. In this technical scheme, heat-conducting glue can further guarantee on the one hand the gas suspension bearing with the heat transfer efficiency of heat-conducting piece guarantees the position reliability of heat-conducting piece, more importantly, heat-conducting glue can also have certain elasticity, and it can form displacement compensation to the foil (for example bottom foil) in the gas suspension bearing, guarantees the reliability of gas suspension bearing.

The heat conducting pieces are arranged along the circumferential direction of the air suspension bearing at even intervals, so that the air suspension bearing can be cooled in a balanced manner. In a preferred embodiment, the heat conducting member is preferably a heat pipe, and the heat conductivity of the heat pipe is generally 15-25 times that of the bearing seat material, so as to improve the heat conducting efficiency.

In one embodiment, the air bearing is a radial bearing 1, the bearing seat is one of a front end cover 21 and a rear end cover 22 of the motor, specifically, the front end cover 21 and the rear end cover 22 are respectively configured with a bearing chamber for accommodating the radial bearing 1, and the heat conducting member includes a second heat pipe 52, a portion of which is located between a bottom foil of the radial bearing 1 and the front end cover 21 or the rear end cover 22, and another portion of which extends along a surface of the front end cover 21 or the rear end cover 22, so as to ensure heat conduction from the radial bearing 1 to the position of the front end cover 21 or the rear end cover 22.

In another embodiment, the air bearing is an axial bearing 3, the bearing seat is one of a front axial bearing seat 41 and a rear axial bearing seat 42, the heat conducting member includes a first heat pipe 51, a first end of the first heat pipe 51 is in contact connection with an inner ring of the axial bearing 3, a second end of the first heat pipe 51 is in contact connection with an outer ring of the front axial bearing seat 41 or the rear axial bearing seat 42, and thus the heat of the inner ring of the bearing can be quickly transferred to a low-temperature region of the outer ring of the end cover through the heat pipe to be cooled. In this case, the first heat pipe 51 is specifically, for example, a long strip type, and in other cases, the first heat pipe 51 may also be provided with a spider web structure, in which the position guide bars corresponding to the inner ring of the axial bearing 3 are arranged more densely, and the position guide bars corresponding to the outer ring of the bearing seat are arranged less densely.

The front axial bearing seat 41 and/or the rear axial bearing seat 42 are/is configured with a mounting groove 6, and the first heat pipe 51 is mounted in the mounting groove 6 to ensure the positional reliability and stability of the first heat pipe 51, it being understood that the first heat pipe 51 should be capable of coming into contact with the axial bearing 3.

According to an embodiment of the present invention, there is also provided an electric machine, including the above-mentioned aero-levitation bearing assembly, the electric machine further includes a housing 102, a cooling flow channel 101 is configured in the housing 102, and heat exchange is formed between one end of the heat pipe and the cooling flow channel 101, so that heat at the aero-levitation bearing is taken away by heat exchange between the cooling liquid in the cooling flow channel 101 on the housing 102 and the heat conducting member without configuring corresponding cooling flow channels on the front end cover 21 and the rear end cover 22, thereby improving overall reliability of the apparatus.

According to an embodiment of the present invention, there is also provided an air compressor including the motor described above.

It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims (11)

1. The utility model provides an air suspension bearing assembly which characterized in that, includes the bearing frame and connect in the air suspension bearing on the bearing frame, press from both sides between bearing frame and the air suspension bearing and be equipped with heat-conducting piece, heat conduction that heat-conducting piece can be with air suspension bearing department because the windmilling produces is to on the bearing frame.

2. The air bearing assembly of claim 1, wherein the space formed by the air bearing and the bearing seat and the space outside the heat conducting member are filled with heat conducting glue.

3. The air suspension bearing assembly of claim 2, wherein the thermally conductive paste is an epoxy.

4. The air suspension bearing assembly of claim 1, wherein the thermal conduction member has a plurality of thermal conduction members that are evenly spaced along a circumference of the air suspension bearing.

5. Air suspension bearing assembly according to claim 1, characterized in that the air suspension bearing is a radial bearing (1) and the bearing housing is one of a front end housing (21) and a rear end housing (22) of an electrical machine.

6. Air suspension bearing assembly according to claim 1, characterized in that the air suspension bearing is an axial bearing (3), the bearing housing being one of a front axial bearing housing (41), a rear axial bearing housing (42).

7. Air suspension bearing assembly according to claim 6, characterized in that the heat conducting element comprises a first heat pipe (51), a first end of the first heat pipe (51) being in contact connection with an inner ring of the axial bearing (3) and a second end of the first heat pipe (51) being in contact connection with an outer ring of the front axial bearing seat (41) or the rear axial bearing seat (42).

8. Air suspension bearing assembly according to claim 7, characterized in that the front axial bearing seat (41) and/or the rear axial bearing seat (42) is configured with a mounting groove (6), the first heat pipe (51) being mounted in the mounting groove (6).

9. An electrical machine comprising an air bearing assembly according to any of claims 1 to 8.

10. The machine according to claim 9, further comprising a housing (102), wherein a cooling channel (101) is configured in the housing (102), and wherein heat is exchanged between one end of the heat-conducting member and the cooling channel (101).

11. An air compressor comprising the motor of claim 10.

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