CN215990422U - Air cooling unit for air compressor, air compressor and hydrogen fuel cell system - Google Patents

Abstract

The utility model provides an air cooling unit for an air compressor, the air compressor and a hydrogen fuel cell system, and belongs to the technical field of fuel cells, wherein the air cooling unit for the air compressor comprises a motor shell, a first-stage connecting air channel and a second-stage connecting air channel are arranged in the wall thickness range of the motor shell, and air outlet holes separated from the first-stage connecting air channel and the second-stage connecting air channel are also formed in the motor shell; the motor stator is arranged in the motor shell; the motor rotor is arranged in an annular space formed by the motor stator in a penetrating mode, and the motor rotor, the motor stator and the motor shell form a motor inner space communicated with the air outlet hole together; the primary mounting assembly is sleeved on the motor rotor and is provided with a primary air cooling channel communicated with the primary connecting air channel and the inner space of the motor; and the secondary mounting component is sleeved on the motor rotor, arranged at an interval with the primary mounting component and provided with a secondary air cooling channel communicated with the secondary connecting air channel and the inner space of the motor. Wherein, the secondary installation component is also provided with a pressurizing hole for communicating the secondary air cooling channel with the inner space of the motor.

Description

Air cooling unit for air compressor, air compressor and hydrogen fuel cell system

Technical Field

The utility model belongs to the technical field of fuel cells, and particularly relates to an air cooling unit for an air compressor, the air compressor and a hydrogen fuel cell system.

Background

The hydrogen fuel cell takes hydrogen and air (oxygen in the air) as fuel, and generates electrochemical reaction to directly convert the chemical energy of the fuel into electric energy, and the reaction generates water, and has the characteristics of no pollution, wide application range, high efficiency and the like. Research shows that the high-pressure and large-flow air supply has obvious improvement effect on improving the power generation power of the hydrogen fuel cell. For this reason, before the air enters the hydrogen fuel cell, the air needs to be pressurized by an air compressor (collectively referred to as an air compressor).

The air compressor generally adopts a motor direct-drive mode, a motor rotor and a main shaft are made into an integrated structure, an impeller is arranged on the rotor and is arranged in a volute, and under the action of high-speed rotation of the rotor, the impeller drives air to rotate at high speed and interacts with the volute to generate high-pressure and large-flow air. Because high-speed rotation can lead to the inside a large amount of heats that produces of air compressor machine, so in order to guarantee air compressor machine normal operating, need in time for the air compressor machine heat dissipation.

Traditional air compressor machine generally adopts two cooling designs of forced air cooling and water-cooling or water-cooling design alone, dispels the heat to parts such as inside electric motor rotor, bearing, and although the cooling effect is higher relatively, overall structure designs and processing are comparatively complicated, and the requirement is high to the leakproofness.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an air cooling unit for an air compressor, the air compressor and a hydrogen fuel cell system, and aims to solve the technical problems that the traditional air compressor generally adopts an air cooling and water cooling double-cooling design or a single water cooling design to dissipate heat of parts such as an internal motor rotor, a bearing and the like, the whole structure design and processing are complex and the requirement on sealing performance is extremely high although the cooling effect is relatively high.

In order to achieve the purpose, the utility model adopts the technical scheme that:

in a first aspect, the present invention provides a wind cooling unit for an air compressor, comprising: the motor shell is provided with a secondary connecting air channel within the wall thickness range and is also provided with an air outlet separated from the secondary connecting air channel; the motor stator is arranged in the motor shell; the motor rotor is arranged in an annular space formed by the motor stator in a penetrating mode, and the motor rotor, the motor stator and the motor shell form a motor inner space communicated with the air outlet hole together; the primary mounting assembly is sleeved on the motor rotor and is provided with a primary air cooling channel communicated with the primary and secondary connecting air channels and the inner space of the motor; the secondary mounting component is sleeved on the motor rotor, arranged at an interval with the primary mounting component and provided with a secondary air cooling channel communicated with the primary and secondary connecting air channels and the inner space of the motor;

the secondary mounting assembly is also provided with a pressurizing hole which is communicated with the secondary air cooling channel and the inner space of the motor; the motor shell or the first-level installation component is further provided with an air inlet channel, so that the air inlet channel, the second-level connecting air channel, the first-level air cooling channel, the second-level air cooling channel, the supercharging holes, the inner space of the motor and the air outlet holes form a plurality of different air cooling paths, and the motor stator, the motor rotor, the first-level installation component and the second-level installation component are independently air-cooled.

In one possible implementation manner, the secondary mounting assembly includes a secondary seal seat sleeved on the motor rotor and a secondary radial bearing seat, and the secondary radial bearing seat is adjacent to the primary mounting assembly relative to the secondary seal seat;

the secondary radial bearing seat is provided with a secondary first sub air duct communicated with the secondary connecting air duct, a secondary second sub air duct is formed between the secondary radial bearing seat and the secondary sealing seat, and bearing gaps of the secondary first sub air duct, the secondary second sub air duct and the secondary radial bearing seat form the secondary air cooling channel;

the second-level radial bearing seat is provided with a pressurizing hole which is separated from the second-level first sub-air channel, the pressurizing hole is communicated with the second-level second sub-air channel, the air inlet channel, the second-level connecting air channel, the second-level first sub-air channel, the second-level second sub-air channel and the bearing gap of the second-level radial bearing seat form a first air cooling path through the motor inner space, and the air inlet channel, the second-level connecting air channel, the second-level first sub-air channel, the second-level second sub-air channel, the pressurizing hole and the motor inner space reach the air outlet hole to form a second air cooling path.

In one possible implementation, the radial cross-sectional profile area of the supercharging aperture is smaller than the radial cross-sectional profile area of the secondary first sub-duct.

In a possible implementation manner, the primary mounting assembly includes a primary seal seat, a thrust bearing seat, a thrust disk and a primary radial bearing seat, which are sequentially sleeved on the motor rotor, and the primary radial bearing seat is adjacent to the secondary mounting assembly relative to the thrust disk; the thrust bearing seat is provided with an inner air-entraining hole communicated with the primary diffusion surface, and the inner air-entraining hole forms the air inlet channel.

In a possible implementation manner, the first-stage radial bearing block is provided with a first-stage first sub air duct communicated with the internal air entraining hole, a second-stage second sub air duct communicated with the first-stage first sub air duct, and a third-stage sub air duct communicated with the first-stage first sub air duct, and the second-stage second sub air duct is communicated with the second-stage connecting air duct;

a first-stage fourth sub air duct communicated with the first-stage third sub air duct is formed between the first-stage radial bearing seat and the thrust disc, a first-stage fifth sub air duct communicated with the first-stage third sub air duct is formed between the thrust disc and the thrust bearing seat, a first-stage sixth sub air duct communicated with the first-stage fifth sub air duct is formed between the thrust bearing seat and the first-stage sealing seat, the thrust bearing seat is provided with a first-stage seventh sub air duct communicated with the first-stage sixth sub air duct, the first-stage radial bearing seat is further provided with a first-stage eighth sub air duct communicated with the first-stage seventh sub air duct, and the first-stage eighth sub air duct is communicated with the inner space of the motor;

the bearing gaps of the first-stage first sub-air duct, the first-stage second sub-air duct, the first-stage third sub-air duct, the first-stage fourth sub-air duct, the first-stage fifth sub-air duct, the first-stage sixth sub-air duct, the first-stage seventh sub-air duct, the first-stage eighth sub-air duct and the first-stage radial bearing seat form the first-stage air cooling channel;

from inside induced air hole, the first sub-wind channel of one-level, the one-level third sub-wind channel, the one-level fourth sub-wind channel, the bearing clearance of the radial bearing frame of one-level motor inner space extremely the exhaust vent constitutes the third air-cooled route, from inside induced air hole the first sub-wind channel of one-level, the one-level third sub-wind channel, the one-level fifth sub-wind channel the one-level sixth sub-wind channel, the one-level seventh sub-wind channel, the one-level eighth sub-wind channel the motor inner space extremely the exhaust vent constitutes the fourth air-cooled route.

In a possible implementation manner, the motor housing is provided with an air inlet hole communicated with the secondary connecting air duct, and the air inlet hole forms the air inlet channel.

In a possible implementation manner, the primary and secondary connecting air ducts are provided in plurality at intervals along the circumferential direction of the motor casing, and each of the primary and secondary connecting air ducts is communicated with the air inlet channel, the primary air cooling channel and the secondary air cooling channel.

In one possible embodiment, the circumferential outer wall of the motor housing has a plurality of heat dissipating fins arranged at intervals parallel to the axis thereof.

The air cooling unit for the air compressor provided by the utility model at least has the following technical effects: compared with the prior art, the air cooling unit for the air compressor, provided by the utility model, has the advantages that only the air cooling design is adopted on the motor shell, the water cooling design is cancelled, the whole structure design and the processing procedure can be simplified, the water cooling design is cancelled, the liquid leakage can be avoided, the requirement on the sealing performance is reduced, meanwhile, the pressurizing hole is arranged on the second-stage installation component, the air flow between the second-stage air cooling channel and the internal space of the motor can be balanced, and the required pressure is provided for the heat dissipation of the internal space of the motor and the second-stage installation component, so that a plurality of different air cooling paths formed by the air inlet channel, the first-stage connecting air channel, the first-stage air cooling channel, the second-stage air cooling channel, the pressurizing hole, the internal space of the motor and the air outlet hole can carry out more comprehensive, more stable and more smooth heat dissipation and cooling on the motor stator, the motor rotor, the first-stage installation component and the second-stage installation component, and the air outlet hole, and the higher cooling effect can be ensured, the service life of each part is prolonged, and the cooling requirement is met.

In a second aspect, the present invention further provides an air compressor including the air cooling unit for an air compressor according to any one of the above embodiments.

The air compressor provided by the utility model adopts the air cooling unit for the air compressor, on the basis of the same technical effect, the effective cooling effect can be realized through the air cooling design, the complex structural design when the air cooling and the water cooling exist simultaneously is simplified, the whole structure is more compact and more miniaturized, the weight of the whole air compressor is lighter, and the design difficulty, the production difficulty and the production cost are reduced.

In a third aspect, the present invention also provides a hydrogen fuel cell system including the air compressor as described above.

The hydrogen fuel cell system provided by the utility model adopts the air compressor, the technical effects of the air compressor and the air compressor are the same, and the description is omitted.

Drawings

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

Fig. 1 is a schematic cross-sectional view of an air cooling unit for an air compressor according to an embodiment of the present invention;

FIG. 2 is another schematic cross-sectional view of an air cooling unit for an air compressor employing internal bleed air in accordance with an embodiment of the present invention;

fig. 3 is a schematic view of an air cooling path when the air cooling unit for the air compressor uses internal bleed air according to an embodiment of the present invention;

fig. 4 is a schematic cross-sectional view of an air cooling unit for an air compressor according to an embodiment of the present invention, which uses a motor casing to bleed air;

FIG. 5 is a perspective view of a motor housing according to an embodiment of the present invention;

fig. 6 is a cross-sectional view of the motor housing of fig. 5 in a radial direction;

fig. 7 is a schematic cross-sectional view of the motor housing of fig. 5 in an axial direction;

figure 8 is a schematic cross-sectional view of another angle in the axial direction of the motor housing of figure 5;

FIG. 9 is a perspective view of a secondary radial bearing seat according to an embodiment of the present invention;

FIG. 10 is a schematic right side view of the secondary radial bearing housing of FIG. 9;

FIG. 11 is a schematic left side view of the secondary radial bearing housing of FIG. 9;

FIG. 12 is a schematic cross-sectional view of the secondary radial bearing blocks of FIG. 11 through the secondary first sub-ducts;

FIG. 13 is a schematic cross-sectional view of the secondary radial bearing housing of FIG. 11 through a booster bore;

fig. 14 is a schematic cross-sectional view of an air compressor according to an embodiment of the present invention;

fig. 15 is a system diagram of a hydrogen fuel cell system according to an embodiment of the present invention.

The reference numbers in the figures are:

1. air cooling unit 100 for air compressor, motor housing 110, and secondary connection air duct

120. Air outlet 130, air inlet 140 and radiating fins

200. Motor stator 300, motor rotor 310, motor inner space

400. First-level mounting assembly 410, first-level sealing seat 420 and thrust bearing seat

421. Inner air guide hole 430, thrust disc 440, primary radial bearing seat

451. A first sub-air passage 452, a second sub-air passage 453, and a third sub-air passage

454. A first-stage fourth sub-air flue 455, a first-stage fifth sub-air flue 456, and a first-stage sixth sub-air flue

457. A seventh sub-air duct 458, an eighth sub-air duct 460, and a third air-cooling path

470. Fourth air-cooled path 500, secondary installation component 510, secondary seal seat

520. Secondary radial bearing seat 521, supercharging hole 531 and secondary first sub-air duct

532. A second sub-air duct 540, a first air-cooling path 550, and a second air-cooling path

2. Air compressor 610, first-stage volute 620 and second-stage volute

630. First-stage impeller 640, second-stage impeller 650 and interstage pipeline

3. Hydrogen fuel cell system 700 and cell body

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

It will be understood that when an element is referred to as being "in communication with" another element, it can be directly in communication with the other element or intervening elements may also be present. When an element is referred to as being "disposed on," "disposed on" another element, it can be directly on the other element or intervening elements may also be present. "plurality" means two or more. "at least one" refers to one or more quantities.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Referring to fig. 1 to 15 together, the air cooling unit 1 for an air compressor, the air compressor 2, and the hydrogen fuel cell system 3 according to the embodiment of the present invention will be described.

Referring to fig. 1 to 13, an embodiment of the present invention provides an air cooling unit 1 for an air compressor, including: the motor housing 100 is provided with a secondary connecting air duct 110 within the wall thickness range thereof, and is also provided with an air outlet 120 separated from the secondary connecting air duct 110; a motor stator 200 provided in the motor housing 100; the motor rotor 300 is arranged in the annular space formed by the motor stator 200 in a penetrating way, and the motor rotor 300, the motor stator 200 and the motor shell 100 together form a motor inner space 310 communicated with the air outlet 120; a primary mounting assembly 400, which is sleeved on the motor rotor 300 and has a primary air cooling passage communicating the primary connecting air duct 110 and the motor inner space 310; and a secondary mounting assembly 500 sleeved on the motor rotor 300 and spaced apart from the primary mounting assembly 400, and having a secondary air cooling passage communicating the primary and secondary connecting air ducts 110 and the motor inner space 310.

Wherein, the secondary mounting assembly 500 further has a pressurizing hole 521 for communicating the secondary air cooling passage with the motor inner space 310; the motor housing 100 or the primary mounting assembly 400 further has an air inlet passage such that the air inlet passage, the primary and secondary connecting air ducts 110, the primary air-cooling passage, the secondary air-cooling passage, the pressurizing holes 521, the motor inner space 310 and the air outlet 120 form a plurality of different air-cooling paths to separately air-cool the motor stator 200, the motor rotor 300, the primary mounting assembly 400 and the secondary mounting assembly 500. Of course, air inlet channels may be provided in both the motor housing 100 and the primary mounting assembly 400, if desired.

It is understood that the number of the primary and secondary connecting air ducts 110 is not limited, and may be one, two, three, four, five, etc., and is selected according to the specific design size. In the embodiment of the utility model, the air-cooling air-entraining mode is not limited, and according to the difference of the air inlet channel, a plurality of different air-cooling paths can be formed by the air inlet channel, the primary and secondary connecting air channels 110, the primary air-cooling channel, the secondary air-cooling channel, the supercharging holes 521, the motor internal space 310 and the air outlet 120, and the plurality of different air-cooling paths can perform more comprehensive, more stable and more smooth heat dissipation and cooling on the motor stator 200, the motor rotor 300, the primary mounting assembly 400 and the secondary mounting assembly 500, thereby ensuring the cooling effect. The pressurizing hole 521 can balance air flow between the secondary air cooling channel and the motor inner space 310, provide required pressure for heat dissipation of the motor inner space 310 and the secondary mounting assembly 500, and ensure smoothness and stability of heat dissipation and cooling.

The traditional cooling mode is a water cooling and air cooling dual-cooling design or a single water cooling design, a connecting mechanism of cooling liquid needs to be designed on a motor shell, the requirement on the tightness of a water cooling channel is extremely high, the number of integral parts is large, and the water cooling design is not necessary or is difficult to install due to the limitation of the use environment or structure of some engineering vehicles.

Therefore, in the embodiment of the present invention, the motor housing 100 only adopts an air-cooling design and does not adopt a water-cooling design, thereby avoiding the above problems, simplifying the overall structure and reducing the design difficulty on the basis of satisfying the cooling effect.

The air cooling unit 1 for the air compressor provided by the embodiment of the utility model at least has the following technical effects: compared with the prior art, the air cooling unit 1 for the air compressor provided by the embodiment of the utility model has the advantages that the air cooling design is only adopted on the motor shell 100, the water cooling design is eliminated, the whole structure design and the processing procedure can be simplified, the liquid leakage can be avoided due to the elimination of the water cooling design, the requirement on the sealing performance is reduced, meanwhile, the pressurizing hole 521 is arranged on the secondary mounting component 500, the air flow between the secondary air cooling channel and the motor inner space 310 can be balanced, and the pressure required by the heat dissipation of the motor inner space 310 and the secondary mounting component 500 is provided, so that a plurality of different air cooling paths formed by the air inlet channel, the secondary connecting air cooling channel 110, the primary air cooling channel, the secondary air cooling channel, the pressurizing hole 521, the motor inner space 310 and the air outlet 120 can more comprehensively perform air cooling on the motor stator 200, the motor rotor 300, the primary mounting component 400 and the secondary mounting component 500, More stable, more unobstructed heat dissipation cooling guarantees higher cooling effect, prolongs the life of each part, satisfies the cooling requirement.

Referring to fig. 1 to 4 and 9 to 13, in some possible embodiments, the secondary mounting assembly 500 includes a secondary seal seat 510 sleeved on the motor rotor 300 and a secondary radial bearing seat 520, wherein the secondary radial bearing seat 520 is adjacent to the primary mounting assembly 400 relative to the secondary seal seat 510; the secondary radial bearing seat 520 is provided with a secondary first sub-air duct 531 communicated with the primary connecting air duct 110, a secondary second sub-air duct 532 is formed between the secondary radial bearing seat 520 and the secondary sealing seat 510, and bearing gaps of the secondary first sub-air duct 531, the secondary second sub-air duct 532 and the secondary radial bearing seat 520 form a secondary air cooling channel; the second-stage radial bearing seat 520 is provided with a pressurizing hole 521 separated from the second-stage first sub-air duct 531, and the pressurizing hole 521 is communicated with the second-stage second sub-air duct 532.

A first air cooling path 540 is formed from the bearing gap of the air inlet channel, the first secondary connecting air channel 110, the second secondary first sub air channel 531, the second secondary second sub air channel 532 and the second radial bearing seat 520, and the motor inner space 310 to the air outlet 120, and a second air cooling path 550 is formed from the air inlet channel, the first secondary connecting air channel 110, the second secondary first sub air channel 531, the second secondary second sub air channel 532, the supercharging hole 521, the motor inner space 310 to the air outlet 120. In this way, cooling of the secondary radial bearing housing 520 and the secondary seal housing 510 can be achieved.

It will be appreciated that secondary mounting assembly 500 may be adapted to accommodate the addition or subtraction of subcomponents depending on the mounting needs. The secondary first sub-air ducts 531 may be correspondingly provided with more than one, two, three, four, five, etc. according to the number and position of the primary and secondary connecting air ducts 110. The secondary second sub-air duct 532 is formed by a gap between the secondary radial bearing housing 520 and the secondary seal housing 510, and the gap may be formed by a cooling groove provided on both or one of them. The secondary second sub-air ducts 532 may be circumferentially arranged in a circle, or may be designed to correspond to each secondary first sub-air duct 531 at intervals.

In this embodiment, at least one pressurizing hole 521 separated from the second-stage first sub-air duct 531 and communicated with the second-stage second sub-air duct 532 is disposed on the second-stage radial bearing seat 520, the second-stage first sub-air duct 531 may be disposed obliquely with respect to an axis of the second-stage radial bearing seat 520, and the pressurizing hole 521 may be disposed parallel with the axis of the second-stage radial bearing seat 520, or may be disposed obliquely, which is not limited thereto. The pressurization hole 521 can balance the airflow between the second-stage second sub-air duct 532 and the motor inner space 310, provide pressure for heat dissipation of the motor inner space 310, and ensure the smoothness of an air cooling path.

In one embodiment, the radial cross-sectional profile area of the pressurization hole 521 is smaller than the radial cross-sectional profile area of the secondary first sub-duct 531. In order to ensure that the wind energy of the second-stage first sub-air duct 531 can fully and comprehensively cool the second-stage radial bearing seat 520 and the second-stage sealing seat 510, the radial cross-sectional profile area of the pressurizing hole 521 is set to be relatively smaller, so that the lower cooling effect caused by insufficient wind in the second-stage second sub-air duct 532 due to more shunting is prevented, and the balanced airflow effect of the pressurizing hole 521 is ensured.

Referring to fig. 1 to 3, in some possible embodiments, the primary mounting assembly 400 includes a primary seal seat 410, a thrust bearing seat 420, a thrust disk 430, and a primary radial bearing seat 440 sequentially sleeved on the motor rotor 300, wherein the primary radial bearing seat 440 is adjacent to the secondary mounting assembly 500 with respect to the thrust disk 430; the thrust bearing block 420 is provided with an internal air guiding hole 421 for communicating with the primary diffusion surface, and the internal air guiding hole 421 forms an air inlet channel. It will be appreciated that the primary mounting assembly 400 may be adapted to accommodate the addition or removal of subcomponents depending on the mounting requirements.

In this embodiment, the primary diffuser is formed by the cavity wall of the cavity formed between the primary volute 610 and the thrust bearing housing 420. Set up the inside bleed hole 421 for axis slope setting or parallel arrangement on thrust bearing frame 420, can realize inside bleed, improve the gaseous utilization ratio of diffusion, reduce the gas circuit design to motor casing 100, reduce the processing degree of difficulty of motor casing 100.

Referring to fig. 1 to 3, in one embodiment, the primary radial bearing seat 440 has a primary first sub-air passage 451 in communication with the inner air guiding hole 421, a primary second sub-air passage 452 in communication with the primary first sub-air passage 451, and a primary third sub-air passage 453 in communication with the primary first sub-air passage 451, and the primary second sub-air passage 452 is in communication with the secondary connecting air passage 110.

A first-stage fourth sub air duct 454 communicated with the first-stage third sub air duct 453 is formed between the first-stage radial bearing seat 440 and the thrust disk 430, a first-stage fifth sub air duct 455 communicated with the first-stage third sub air duct 453 is formed between the thrust disk 430 and the thrust bearing seat 420, a first-stage sixth sub air duct 456 communicated with the first-stage fifth sub air duct 455 is formed between the thrust bearing seat 420 and the first-stage seal seat 410, the thrust bearing seat 420 is provided with a first-stage seventh sub air duct 457 communicated with the first-stage sixth sub air duct 456, the first-stage radial bearing seat 440 is further provided with a first-stage eighth sub air duct 458 communicated with the first-stage seventh sub air duct 457, and the first-stage eighth sub air duct 458 is communicated with the motor inner space 310.

Bearing gaps of the first-stage first sub-air flue 451, the first-stage second sub-air flue 452, the first-stage third sub-air flue 453, the first-stage fourth sub-air flue 454, the first-stage fifth sub-air flue 455, the first-stage sixth sub-air flue 456, the first-stage seventh sub-air flue 457, the first-stage eighth sub-air flue 458 and the first-stage radial bearing seat 440 form a first-stage air cooling channel together.

A third air cooling path 460 is formed from the inner air guide hole 421, the first-stage first sub air duct 451, the first-stage third sub air duct 453, the first-stage fourth sub air duct 454, the bearing gap of the first-stage radial bearing seat 440, and the motor inner space 310 to the air outlet 120, and a fourth air cooling path 470 is formed from the inner air guide hole 421, the first-stage first sub air duct 451, the first-stage third sub air duct 453, the first-stage fifth sub air duct 455, the first-stage sixth sub air duct 456, the first-stage seventh sub air duct 457, the first-stage eighth sub air duct 458, the motor inner space 310 to the air outlet 120. In this manner, cooling of primary radial bearing seat 440, thrust disk 430, thrust bearing seat 420, and primary seal seat 410 may be achieved.

Specifically, the primary first sub-air duct 451 may be disposed in parallel or inclined with respect to the axis of the primary radial bearing housing 440, and may be formed by slotting the primary radial bearing housing 440. The first-stage second sub-air channels 452 correspond to the first-stage second connecting air channels 110 in number and position, and may be disposed obliquely or in parallel. The first-stage third sub-ducts 453 are provided at a position corresponding to the number and positions of the corresponding first-stage second sub-ducts 452, and are arranged perpendicularly or obliquely with respect to the axis of the first-stage radial bearing housing 440. The first-stage fourth sub-air channel 454 is formed by a gap between the first-stage radial bearing seat 440 and the thrust disk 430, and the gap may be formed by cooling grooves provided on both of them, or may be formed by a cooling groove provided on one of them.

The first-stage fifth sub-duct 455 may communicate with the first-stage fourth sub-duct 454, and is formed by a gap between the thrust disk 430 and the thrust bearing housing 420, and the gap may be formed by a cooling groove provided on both or one of them. The first-stage sixth sub-duct 456 is formed by a gap between the thrust bearing housing 420 and the first-stage seal housing 410, and the gap may be formed by cooling grooves provided in both or either one of them. The seventh sub-duct 457 may be formed by an opening of the thrust bearing housing 420, and may be provided in plurality at intervals. The number and positions of the first-stage eighth sub-air ducts 458 and the first-stage seventh sub-air ducts 457 correspond to each other, and the first-stage eighth sub-air ducts 458, the first-stage second sub-air ducts 452, and the first-stage third sub-air ducts 453 may be formed by openings of the first-stage radial bearing seat 440.

It will be appreciated that the above-described air duct design provides substantially complete cooling of the primary radial bearing seat 440, thrust disk 430, thrust bearing seat 420, and primary seal seat 410. Of course, other path duct designs may be used without limitation.

On the basis of the present embodiment, the primary and secondary air channels 452 and 110 are communicated, and in the first air-cooling path 540 and the second air-cooling path 550, the internal air-guiding hole 421, the primary and secondary air channels 451 and 452 provide an air source for the primary and secondary air channel 110.

Referring to fig. 4, in some other possible embodiments, the motor housing 100 is formed with air inlet holes 130 communicated with the primary and secondary connecting air ducts 110, and the air inlet holes 130 form an air inlet passage. In this embodiment, the first-stage mounting assembly 400 and the second-stage mounting assembly 500, and the motor stator 200 and the motor rotor 300 can be fully and comprehensively cooled by using the air intake from the motor housing 100. Depending on the location of the air inlet openings 130, the air supply for the primary and secondary air cooling ducts may be provided via the air inlet openings 130 and the primary and secondary connecting ducts 110. At this time, in the primary installation assembly 400, referring to the foregoing embodiment, the primary first sub air duct 451 is not provided, and at the same time, the positions of the primary second sub air duct 452 and the primary third sub air duct 453 may be adjusted or combined.

Referring to fig. 5 to 8, in some possible embodiments, a plurality of secondary connecting air ducts 110 are provided at intervals along the circumferential direction of the motor housing 100, and each of the secondary connecting air ducts 110 is communicated with the air inlet passage, the primary air cooling passage, and the secondary air cooling passage. In this embodiment, the primary and secondary connecting air ducts 110 may be arranged at equal intervals or at unequal intervals, and may form an annular circulation path with the air inlet passage, the primary air cooling passage, the secondary air cooling passage, and the motor internal space 310, so as to increase the circulation volume, improve the cooling effect to a great extent, and prolong the service life of each component.

Referring to fig. 1 to 8, in some possible embodiments, the circumferential outer side wall of the motor housing 100 has a plurality of heat dissipating fins 140 spaced parallel to the axis thereof. In this embodiment, the cross section of the heat dissipating fins 140 along the axis of the motor housing 100 may be a regular or irregular shape such as a rectangle, a triangle, a pentagon, etc. The distance between two adjacent heat dissipation fins 140 may be the same or different. The heat dissipation fins 140 can further improve the cooling effect on the basis of the above-described embodiment.

Based on the same inventive concept, please continue to refer to fig. 14, an embodiment of the present invention further provides an air compressor 2, including the air cooling unit 1 for an air compressor according to any of the above embodiments. The air compressor 2 of the embodiment of the utility model can be specifically a centrifugal air suspension permanent magnet driving air compressor.

It is to be understood that when the air compressor 2 employs two-stage compression, the air compressor 2 further includes a first-stage volute 610 and a second-stage volute 620 respectively engaged with both ends of the motor housing 100, a first-stage impeller 630 and a second-stage impeller 640 respectively disposed in the first-stage volute 610 and the second-stage volute 620, and an inter-stage conduit 650 communicating the first-stage volute 610 and the second-stage volute 620. When the air compressor 2 adopts the first-stage compression belt for energy recovery, the air compressor 2 further includes a first-stage volute 610 and a second-stage volute 620 respectively matched with two ends of the motor housing 100, and a first-stage impeller 630 and a second-stage turbine respectively disposed in the first-stage volute 610 and the second-stage volute 620.

Based on this, air compressor machine 2 can also be according to different compression stage and recovery grade adaptability adjustment component.

The air compressor 2 provided by the embodiment of the utility model adopts the air cooling unit 1 for the air compressor, and on the basis of the same technical effects, the effective cooling effect can be realized through the air cooling design, the complex structural design when the air cooling and the water cooling exist simultaneously is simplified, the whole structure is more compact and more miniaturized, the weight of the whole machine is lighter, and the design difficulty, the production difficulty and the production cost are reduced.

Based on the same inventive concept, please continue to refer to fig. 15, the embodiment of the present invention further provides a hydrogen fuel cell system 3, which includes the air compressor 2 as described above. It is understood that the hydrogen fuel cell system 3 further includes a cell body 700 communicating with the air compressor 2, and other conventional components that achieve power generation.

The hydrogen fuel cell system 3 provided by the embodiment of the utility model adopts the air compressor 2, and the technical effects of the air compressor and the air compressor are the same, so that the details are not repeated.

It is to be understood that, in the foregoing embodiments, various parts may be freely combined or deleted to form different combination embodiments, and details of each combination embodiment are not described herein again, and after this description, it can be considered that each combination embodiment has been described in the present specification, and can support different combination embodiments.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. Air cooling unit for air compressor, its characterized in that includes:

the motor shell is provided with a secondary connecting air channel within the wall thickness range and is also provided with an air outlet separated from the secondary connecting air channel;

the motor stator is arranged in the motor shell;

the motor rotor is arranged in an annular space formed by the motor stator in a penetrating mode, and the motor rotor, the motor stator and the motor shell form a motor inner space communicated with the air outlet hole together;

the primary mounting assembly is sleeved on the motor rotor and is provided with a primary air cooling channel communicated with the primary and secondary connecting air channels and the inner space of the motor; and

the secondary mounting component is sleeved on the motor rotor, arranged at an interval with the primary mounting component and provided with a secondary air cooling channel communicated with the primary and secondary connecting air channels and the inner space of the motor;

the secondary mounting assembly is also provided with a pressurizing hole which is communicated with the secondary air cooling channel and the inner space of the motor; the motor shell or the first-level installation component is further provided with an air inlet channel, so that the air inlet channel, the second-level connecting air channel, the first-level air cooling channel, the second-level air cooling channel, the supercharging holes, the inner space of the motor and the air outlet holes form a plurality of different air cooling paths, and the motor stator, the motor rotor, the first-level installation component and the second-level installation component are independently air-cooled.

2. The air cooling unit for an air compressor as recited in claim 1, wherein the secondary mounting assembly includes a secondary seal housing received over the motor rotor and a secondary radial bearing housing adjacent the primary mounting assembly relative to the secondary seal housing;

the secondary radial bearing seat is provided with a secondary first sub air duct communicated with the secondary connecting air duct, a secondary second sub air duct is formed between the secondary radial bearing seat and the secondary sealing seat, and bearing gaps of the secondary first sub air duct, the secondary second sub air duct and the secondary radial bearing seat form the secondary air cooling channel;

the second-level radial bearing seat is provided with a pressurizing hole which is separated from the second-level first sub-air channel, the pressurizing hole is communicated with the second-level second sub-air channel, the air inlet channel, the second-level connecting air channel, the second-level first sub-air channel, the second-level second sub-air channel and the bearing gap of the second-level radial bearing seat form a first air cooling path through the motor inner space, and the air inlet channel, the second-level connecting air channel, the second-level first sub-air channel, the second-level second sub-air channel, the pressurizing hole and the motor inner space reach the air outlet hole to form a second air cooling path.

3. The air cooling unit for an air compressor according to claim 2, wherein a radial sectional profile area of the supercharging aperture is smaller than a radial sectional profile area of the secondary first sub-duct.

4. The air cooling unit for an air compressor as recited in any one of claims 1 to 3, wherein the primary mounting assembly includes a primary seal housing, a thrust bearing housing, a thrust disk and a primary radial bearing housing sleeved in sequence on the motor rotor, the primary radial bearing housing being adjacent to the secondary mounting assembly with respect to the thrust disk;

the thrust bearing seat is provided with an inner air-entraining hole communicated with the primary diffusion surface, and the inner air-entraining hole forms the air inlet channel.

5. The air cooling unit for an air compressor according to claim 4, wherein the primary radial bearing housing has a primary first sub-duct communicating with the internal bleed air hole, a primary second sub-duct communicating with the primary first sub-duct, and a primary third sub-duct communicating with the primary first sub-duct, the primary second sub-duct communicating with the secondary connecting duct;

a first-stage fourth sub air duct communicated with the first-stage third sub air duct is formed between the first-stage radial bearing seat and the thrust disc, a first-stage fifth sub air duct communicated with the first-stage third sub air duct is formed between the thrust disc and the thrust bearing seat, a first-stage sixth sub air duct communicated with the first-stage fifth sub air duct is formed between the thrust bearing seat and the first-stage sealing seat, the thrust bearing seat is provided with a first-stage seventh sub air duct communicated with the first-stage sixth sub air duct, the first-stage radial bearing seat is further provided with a first-stage eighth sub air duct communicated with the first-stage seventh sub air duct, and the first-stage eighth sub air duct is communicated with the inner space of the motor;

the bearing gaps of the first-stage first sub-air duct, the first-stage second sub-air duct, the first-stage third sub-air duct, the first-stage fourth sub-air duct, the first-stage fifth sub-air duct, the first-stage sixth sub-air duct, the first-stage seventh sub-air duct, the first-stage eighth sub-air duct and the first-stage radial bearing seat form the first-stage air cooling channel;

from inside induced air hole, the first sub-wind channel of one-level, the one-level third sub-wind channel, the one-level fourth sub-wind channel, the bearing clearance of the radial bearing frame of one-level motor inner space extremely the exhaust vent constitutes the third air-cooled route, from inside induced air hole the first sub-wind channel of one-level, the one-level third sub-wind channel, the one-level fifth sub-wind channel the one-level sixth sub-wind channel, the one-level seventh sub-wind channel, the one-level eighth sub-wind channel the motor inner space extremely the exhaust vent constitutes the fourth air-cooled route.

6. The air cooling unit for an air compressor according to any one of claims 1 to 3, wherein the motor housing is provided with air inlet holes communicating with the secondary connection air duct, the air inlet holes constituting the air inlet passage.

7. The air cooling unit for an air compressor according to claim 1, wherein a plurality of the primary and secondary connecting air ducts are provided at intervals in a circumferential direction of the motor casing, and each of the primary and secondary connecting air ducts is communicated with the air intake passage, the primary air-cooling passage, and the secondary air-cooling passage.

8. The air cooling unit for an air compressor according to claim 1, wherein a circumferential outer side wall of the motor case has a plurality of heat radiating fins arranged at intervals in parallel with an axis thereof.

9. An air compressor characterized by comprising the air-cooling unit for an air compressor according to any one of claims 1 to 8.

10. A hydrogen fuel cell system characterized by comprising the air compressor of claim 9.

Images