CN110805561B

CN110805561B - Pump and hydrogen energy battery automobile

Info

Publication number: CN110805561B
Application number: CN201911028651.0A
Authority: CN
Inventors: 门少国; 孙同星
Original assignee: Hebei Shenhai Electrical Appliances Co ltd
Current assignee: Hebei Shenhai Electrical Appliances Co ltd
Priority date: 2019-10-28
Filing date: 2019-10-28
Publication date: 2022-01-25
Anticipated expiration: 2039-10-28
Also published as: CN110805561A

Abstract

The invention discloses a pump and a hydrogen energy battery automobile, which relate to the field of automobiles, and the pump comprises: a housing having an inlet and an outlet, the housing having a flow passage in a sidewall thereof; the rotating shaft seat is arranged in the shell and divides the shell into a first space and a second space, and the inlet and the outlet are communicated with the first space; a rotating shaft installed in the rotating shaft seat; a rotor assembly mounted on the rotating shaft and located in the second space; the impeller is arranged on the rotating shaft and positioned in the first space, when the impeller drives fluid, the first space is provided with a first area and a second area, and the pressure of the first area is different from that of the second area; the rotating shaft seat is provided with a first opening and a second opening, the first area is communicated with the flow channel through the first opening, and the second area is communicated with the flow channel through the second opening; a stator winding disposed in the second space, the stator winding being disposed at the inner wall of the housing. This application can effectively dispel the heat to the motor of pump.

Description

Pump and hydrogen energy battery automobile

Technical Field

The invention relates to the field of automobiles, in particular to a pump and hydrogen energy battery automobile.

Background

With the development of new energy automobiles, a new generation of hydrogen energy automobiles is produced, the automobiles adopt a hydrogen energy battery power source, the power of the automobiles is developed from 15KW to 80KWM, and therefore, the power of a matched heat dissipation water pump is also developed from dozens of watts to hundreds of watts or even kilowatts. Along with the continuous increase of water pump power, the temperature rise of water pump motor is too high, and water pump heat dissipation problem is outstanding day by day, can say that to powerful water pump increase compulsory heat radiation structure very necessary.

Disclosure of Invention

In order to overcome the above defects in the prior art, embodiments of the present invention provide a pump and a hydrogen energy battery car, which provide a new way to dissipate heat of a pump motor.

The specific technical scheme of the embodiment of the invention is as follows:

a pump, the pump comprising:

a housing having an inlet and an outlet, the housing having a flow passage in a sidewall thereof; the rotating shaft seat is arranged in the shell and divides the shell into a first space and a second space, and the inlet and the outlet are communicated with the first space; a rotating shaft installed in the rotating shaft seat; the rotor assembly is arranged on the rotating shaft and positioned in the second space; the impeller is arranged on the rotating shaft and is positioned in the first space, when the impeller drives fluid, the first space is provided with a first area and a second area, and the pressure of the first area is different from that of the second area; the rotating shaft seat is provided with a first opening and a second opening, the first area is communicated with the flow channel through the first opening, and the second area is communicated with the flow channel through the second opening; a stator winding disposed in the second space, the stator winding being disposed at the housing inner wall.

Preferably, the housing has an axis and the flow passage is annular in a plane perpendicular to the axis.

Preferably, the housing has an axis, the first region and the second region are respectively located at two sides of the axis symmetry, and the first opening and the second opening are respectively located at two sides of the axis symmetry.

Preferably, one end of the housing has a receiving chamber in which a motor control unit is disposed, and the pump further includes: a cover for closing the receiving chamber.

Preferably, the housing includes a first housing and a second housing connected to each other, the first housing and the rotating shaft base form the first space, and the flow passage is located in the second housing.

Preferably, the stator winding is close to the inner wall of the second shell, and the stator winding is attached to the inner wall of the second shell or attached to the inner wall of the second shell through a heat conducting agent.

Preferably, the pump further comprises: and the isolation cover is arranged in the second space and used for isolating the stator winding from the rotor assembly, the isolation cover divides the second space into a first part of the second space and a second part of the second space which are independent of each other, the stator winding is positioned in the first part of the second space, and the rotor assembly is positioned in the second part of the second space.

Preferably, one end of the isolation cover props against the inner wall of the shell, one end of the rotating shaft is inserted into the isolation cover, the other end of the isolation cover props against the rotating shaft seat, and the side wall of the other end of the isolation cover props against the shell.

Preferably, the housing has an axis; the first space comprises a volute, and the first area and the second area are positioned in the volute; the length of the first region at the first aperture and in a direction parallel to the axis is less than the length of the second region at the second aperture and in a direction parallel to the axis when the pressure of the first region is greater than the pressure of the second region.

A hydrogen-powered vehicle comprising a pump as claimed in any one of the preceding claims.

The technical scheme of the invention has the following remarkable beneficial effects:

when the impeller drives fluid, due to the fact that the pressure of the first area and the pressure of the second area in the first space are different, the fluid in the first area or the second area can flow into the flow channel in the side wall of the shell through the first opening and then flow out through the second opening under the action of pressure difference, or flow into the flow channel in the side wall of the shell through the second opening and then flow out through the first opening, so that circulating flow of the fluid in the flow channel in the side wall of the shell is formed, and heat on the shell can be taken away through the fluid. And the stator winding of the pump is arranged on the inner wall of the shell, a large amount of heat generated by the stator winding can be transferred to fluid through the shell, and the fluid continuously flows to take away corresponding heat, so that the heat dissipation of the pump is realized. The temperature rise of the pump motor can be effectively reduced through the mode, and the service life of the whole pump is prolonged.

Specific embodiments of the present invention are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the invention are not so limited in scope. The embodiments of the invention include many variations, modifications and equivalents within the spirit and scope of the appended claims. Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, the proportional sizes, and the like of the respective members in the drawings are merely schematic for facilitating the understanding of the present invention, and do not specifically limit the shapes, the proportional sizes, and the like of the respective members of the present invention. Those skilled in the art, having the benefit of the teachings of this invention, may choose from the various possible shapes and proportional sizes to implement the invention as a matter of case.

FIG. 1 is a cross-sectional view of a pump in an embodiment of the present invention.

Reference numerals of the above figures:

1. a housing; 11. a first housing; 12. a second housing; 13. an inlet; 14. an outlet; 15. a flow channel; 16. a first space; 161. a first region; 162. a second region; 163. a volute chamber; 17. a second space; 171. a second spatial first portion; 172. a second spatial second portion; 18. a housing chamber; 19. a cover body; 2. a rotating shaft seat; 21. a first opening; 22. a second opening; 3. a rotating shaft; 4. a rotor assembly; 5. an impeller; 6. a stator winding; 7. and (4) an isolation cover.

Detailed Description

The details of the present invention can be more clearly understood in conjunction with the accompanying drawings and the description of the embodiments of the present invention. However, the specific embodiments of the present invention described herein are for the purpose of illustration only and are not to be construed as limiting the invention in any way. Any possible variations based on the present invention may be conceived by the skilled person in the light of the teachings of the present invention, and these should be considered to fall within the scope of the present invention. It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, mechanical or electrical connections, communications between two elements, direct connections, indirect connections through intermediaries, and the like. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

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 application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The casing natural heat dissipation that the water pump in existing market mainly leaned on the water pump motor, this kind of structure radiating effect is very unsatisfactory, the stator core assembly of motor is in the casing, stator winding is the main source that generates heat of motor, stator winding directly transmits the heat to the casing on, the control unit of motor also assembles in the casing in addition, the control unit's heat also transmits for the casing, the heat of whole motor all distributes away by the casing like this, the casing natural heat dissipation is slow, can only be applicable to the miniwatt water pump, motor power is bigger for high-power water pump, the motor calorific capacity also can increase, only rely on motor casing natural heat dissipation can not satisfy the heat dissipation requirement completely, this can lead to the motor temperature rise too high, direct influence water pump motor life.

Because the shell of the water pump motor naturally radiates slowly, the radiating effect of the structure is not ideal, so that the structure can only be applied to radiating of the low-power water pump motor at present, and the radiating structure can not meet the radiating requirement of the high-power water pump. In addition, natural heat dissipation is slow, and water pump motor temperature rise is too high, and this can lead to water pump motor life-span to be low, and this is because natural heat dissipation is slower, can lead to water pump motor temperature rise too high, and there is direct relation in the life-span and the temperature of motor control unit, and the temperature every time improves 10 ℃, and the electric elements life-span will reduce one time. And for the high-power water pump, the heat dissipation is slow, and the life-span of stator winding in the water pump motor can be directly influenced by the higher temperature rise of the water pump motor.

Research shows that another water pump heat dissipation structure exists in the market. In order to increase the heat dissipation effect, the heat dissipation fins are added on the shell of the water pump motor to increase the heat dissipation area, the heat dissipation effect of the structure is improved compared with that of the water pump motor without the heat dissipation fins, the temperature rise is relatively reduced by 3-5 ℃, but the heat dissipation effect is still dependent on natural heat dissipation, the heat dissipation effect is not ideal, the size of the water pump is increased by the fins, the smaller the volume requirement of the whole automobile factory on the water pump is, the better the heat dissipation structure is, the greater limitation is also existed in all the heat dissipation structures, and the use requirement can not be well met.

In order to better dissipate heat of a motor of a pump and fundamentally solve the problem of slow natural heat dissipation, the pump is greatly improved, and a pump is provided in the application, wherein fig. 1 is a sectional view of the pump in an embodiment of the invention, and as shown in fig. 1, the pump may include: a housing 1 having an inlet 13 and an outlet 14, the housing 1 having a flow passage 15 in a side wall thereof; the rotating shaft seat 2 is arranged in the shell 1, the rotating shaft seat 2 divides the shell 1 into a first space 16 and a second space 17, and the inlet 13 and the outlet 14 are communicated with the first space 16; a rotary shaft 3 installed in the rotary shaft base 2; a rotor assembly 4 mounted on the rotating shaft 3 and located in the second space 17; an impeller 5 installed on the rotating shaft 3 and located in the first space 16, the first space 16 having a first area 161 and a second area 162 therein when the impeller 5 drives a fluid, the first area 161 and the second area 162 having different pressures; the rotating shaft seat 2 is provided with a first opening 21 and a second opening 22, the first area 161 is communicated with the flow passage 15 through the first opening 21, and the second area 162 is communicated with the flow passage 15 through the second opening 22; and a stator winding 6 disposed in the second space 17, the stator winding 6 being disposed at an inner wall of the housing 1.

When the impeller 5 drives the fluid, due to the difference in pressure between the first area 161 and the second area 162 in the first space 16, the fluid in the first area 161 or the second area 162 flows into the flow channel 15 in the side wall of the casing 1 through the first opening 21 and flows out through the second opening 22 under the action of the pressure difference, or flows into the flow channel 15 in the side wall of the casing 1 through the second opening 22 and flows out through the first opening 21, so that the fluid circulates in the flow channel 15 in the side wall of the casing 1, the heat on the casing 1 can be taken away by the fluid, and the purpose of dissipating the heat of the casing 1 is achieved by the way of forced heat exchange of the casing 1. And the stator winding 6 of the pump is arranged on the inner wall of the shell 1, a large amount of heat generated by the stator winding 6 can be transferred to fluid through the shell 1, and the fluid continuously flows to take away corresponding heat, so that the heat dissipation of the pump is realized. The temperature rise of the pump motor can be effectively reduced through the mode, and the service life of the whole pump is prolonged.

In order to better understand the pump of the present application, it will be further explained and illustrated below. As shown in fig. 1, the housing 1 has an inlet 13 and an outlet 14, and the fluid flows in from the inlet 13 of the housing 1 and flows out from the outlet 14 of the housing 1 after being driven by the pump. Inside the side wall of the housing 1 there is a flow channel 15, into which flow channel 15 in the side wall of the housing 1 the fluid inside the housing 1 can flow. The rotating shaft seat 2 is arranged in the shell 1, the rotating shaft seat 2 divides the shell 1 into a first space 16 and a second space 17, and the inlet 13 and the outlet 14 are communicated with the first space 16.

In a possible embodiment, as shown in fig. 1, the housing 1 may include a first housing 11 and a second housing 12 connected to each other, a clamping groove is formed at an inner wall where the first housing 11 and the second housing 12 are butted, and an edge of the rotating shaft base 2 is clamped in the clamping groove, so that the fixed positioning of the rotating shaft base 2 is realized without moving up and down or left and right. The housing 1 has an axis and the inlet 13 and the outlet 14 are located on the first housing 11. Specifically, the inlet 13 is located at the axis of the middle of one end of the first housing 11 away from the second housing 12, and the outlet 14 is located at the side wall of the first housing 11. The first housing 11 forms a first space 16 with the spindle base 2, and the flow passage 15 may be located in the second housing 12.

As shown in fig. 1, the flow channel 15 may be annular in a plane perpendicular to the axis, so that the flow channel 15 surrounds the circumference of the housing 1, and when fluid flows into the flow channel 15, the fluid can exchange heat in the circumferential direction of the housing 1, so as to improve the heat exchange effect and take away more heat on the housing 1.

As shown in fig. 1, the rotating shaft 3 penetrates the rotating shaft base 2 to be installed in the rotating shaft base 2, and a bearing may be disposed between the rotating shaft 3 and the bearing base. One end of the rotating shaft 3 penetrates through the rotating shaft seat 2 and is positioned in the first space 16, and the other end of the rotating shaft 3 is positioned in the second space 17. The rotor assembly 4 is mounted on the shaft 3 and is located in the second space 17. The impeller 5 is mounted on the shaft 3 at one end thereof in the first space 16. In a possible embodiment, the end of the rotating shaft 3 located in the second space 17 can be inserted into the housing 1, thereby achieving the positioning of the rotating shaft 3. Also, a bearing may be provided between the rotation shaft 3 and the housing 1 to achieve high-speed rotation of the rotation shaft 3.

As shown in fig. 1, when the impeller 5 rotates, fluid is introduced from the inlet 13 and then driven out of the outlet 14. In the above process, the fluid will fill the first space 16. The first space 16 has a first area 161 and a second area 162 therein, and the first area 161 and the second area 162 have different pressures. In one possible embodiment, the first area 161 and the second area 162 are located at different positions in the first space 16, so that the pressure in the first area 161 and the second area 162 is different. The fluid thus flows from the inlet 13 through the first space 16 and out of the outlet 14, and the flow rate of the fluid will vary at different locations in the first space 16 throughout the process, and the difference in flow rate will necessarily result in a different pressure at that location.

In one possible embodiment, a volute 163 exists in the first space 16 during rotation of the impeller 5 to drive the fluid into motion, and the first region 161 and the second region 162 may be located in the volute 163. Likewise, the overall shape of the volute 163 may be different at different locations, resulting in different pressures at different locations of the volute 163. For example, when the pressure of the first region 161 is greater than the pressure of the second region 162, the pressure of the fluid in the volute 163 is correspondingly decreased from a larger pressure to a smaller pressure due to the larger structure of the volute 163, and therefore, the length of the first region 161 at the first opening 21 and in the direction parallel to the axis is smaller than the length of the second region 162 at the second opening 22 and in the direction parallel to the axis.

As shown in fig. 1, the spindle base 2 is provided with a first opening 21 and a second opening 22, the first region 161 is communicated with the flow passage 15 through the first opening 21, and the second region 162 is communicated with the flow passage 15 through the second opening 22. In the present embodiment, the end of the flow passage 15 in the second housing 12 facing the first housing 11 may be an opening that is open, and the opening corresponds to the first opening 21 and the second opening, so that the flow passage 15 communicates with the first opening 21 and the second opening 22.

Because the pressure in the first area 161 is different from that in the second area 162, the fluid in the area with a higher pressure flows into the corresponding opening under the action of the pressure and then flows into the flow channel 15, and because the pressure in the other area is lower, the fluid inevitably flows back to the other area with a lower pressure through the corresponding opening. The fluid in the first space 16 circulates in the flow passage 15 in the housing 1 by the pressure difference between the first area 161 and the second area 162. When flowing through the flow channel 15, the fluid can form forced heat exchange with the shell 1, and the fluid absorbs heat on the shell 1 to effectively cool the shell 1. Since the fluid in the first space 16 is also circulated and has a temperature substantially equal to the temperature of the fluid at the inlet 13, the fluid in the first space 16 can be a relatively good heat sink, and can continuously absorb the heat of the housing 1.

In a preferred embodiment, the first region 161 and the second region 162 may be located on two sides of the axial symmetry, and the first opening 21 and the second opening 22 are located on two sides of the axial symmetry. By the above mode, the fluid in the region with higher pressure enters the corresponding opening and then reaches the flow channel 15, and because the flow channel 15 can be annular, the fluid in the flow channel 15 can be divided into two paths to flow around each half circle at a relatively uniform flow speed to reach the other opening, and then flows back to the region with lower pressure. Through the mode, the circumferential direction of the whole shell 1 can be uniformly radiated, and the phenomenon that the local radiating effect is good and the local radiating effect is poor is avoided.

As shown in fig. 1, the stator winding 6 may be disposed in the second space 17, the stator winding 6 being disposed at an inner wall of the case 1. In the present embodiment, the stator winding 6 is disposed closely at the inner wall of the second housing 12. In order to improve the heat exchange efficiency between the stator winding 6 and the second casing 12, the stator winding 6 may be attached to the inner wall of the second casing 12 or attached to the inner wall through a heat conductive agent. The heat conducting agent can be heat conducting silicone grease and other substances which are beneficial to improving the heat exchange efficiency between the heat conducting agent and the silicone grease. A large amount of heat that stator winding 6 produced can be timely on transmitting to casing 1, through casing 1 efficient transmission to the fluid in runner 15, take away this part heat through the fluid, so, stator winding 6's temperature has obtained better control, and its temperature rise range obtains effectual reduction, can effectively improve stator winding 6's life-span.

In one possible embodiment, the pump may further comprise: and a shield 7 disposed in the second space 17 for isolating the stator winding 6 from the rotor assembly 4, the shield 7 separating the second space 17 into a second space first portion 171 and a second space second portion 172, the stator winding 6 being disposed in the second space first portion 171, and the rotor assembly 4 being disposed in the second space second portion 172. One end of the shield 7 abuts against the inner wall of the housing 1 to achieve positioning of the end of the shield 7. One end of the rotating shaft 3 may be inserted into the cage 7, and a bearing may be disposed between the cage 7 and the rotating shaft 3. The other end of the isolation cover 7 is abutted against the rotating shaft seat 2, and the side wall of the other end of the isolation cover 7 is abutted against the shell 1, so that the flow passage 15, the first opening 21 and the second opening 22 in the shell 1 are isolated from the stator winding 6. Through the mode, realize the location to the cage 7 other end on the one hand, on the other hand can seal the clearance of second casing 12 and bearing frame, avoids flowing into to stator winding 6, rotor subassembly 4 department from the fluid that trompil inflow on the bearing frame on the one hand.

In a possible embodiment, one end of the casing 1 has a housing chamber 18, the housing chamber 18 being provided with a motor control unit, the pump further comprising: a lid 19 for closing the accommodation chamber 18. In the present embodiment, an end of the second housing 12 facing away from the first housing 11 has an accommodation chamber 18, and a motor control unit is provided in the accommodation chamber 18. The pump may further comprise: a cover 19 for closing the accommodation chamber 18, and a sealing ring may be provided between the cover 19 and the housing 1 to achieve sealing. Electronic components in the motor control unit can also produce certain heat when moving, and then the temperature can rise, and secondly, electronic components in the motor control unit can receive the influence temperature of the heat that the stator winding 6 of pump produced can rise. In the present case, the heat transferred to the housing 1 by the stator windings 6 is already substantially carried away by the fluid, which has little effect on the temperature increase caused by the motor control unit. In addition, the heat generated by the motor control unit can be taken away through the shell 1, so that the temperature of the motor control unit can be effectively controlled finally, the motor control unit cannot be greatly increased, and the service life of the motor control unit can be effectively prolonged.

Also proposed in this application is a hydrogen energy battery automobile comprising a pump as in any of the above.

The pump in this application adopts the mode casing 1 of forcing the heat transfer to carry out the heat transfer to the realization is to the effective heat dissipation of stator winding 6, motor control unit etc. and the fluid is taken away the heat that the pump produced through runner 15, has effectively reduced the holistic temperature rise of pump, has improved the complete machine life-span of pump, and the cooling effect of pump is very obvious, has reached operation requirement completely, but the wide application is in all kinds of vehicles and hydrogen energy battery system, especially hydrogen energy battery car.

All articles and references disclosed, including patent applications and publications, are hereby incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe combinations of elements, components, or steps herein also contemplates embodiments that consist essentially of such elements, components, or steps. By using the term "may" herein, it is intended to indicate that any of the described attributes that "may" include are optional. A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, ingredient, component or step is not intended to foreclose other elements, ingredients, components or steps.

The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A pump, characterized in that the pump comprises:

a housing having an inlet and an outlet, the housing having a flow passage in a sidewall thereof; the rotating shaft seat is arranged in the shell and divides the shell into a first space and a second space, and the inlet and the outlet are communicated with the first space; a rotating shaft installed in the rotating shaft seat; the rotor assembly is arranged on the rotating shaft and positioned in the second space; the impeller is arranged on the rotating shaft and is positioned in the first space, when the impeller drives fluid, the first space is provided with a first area and a second area, and the pressure of the first area is different from that of the second area; the rotating shaft seat is provided with a first opening and a second opening, the first area is communicated with the flow channel through the first opening, and the second area is communicated with the flow channel through the second opening; a stator winding disposed in the second space, the stator winding being disposed at the inner wall of the housing; the shell comprises a first shell and a second shell which are connected, the first shell and the rotating shaft seat form the first space, and the flow passage is positioned in the second shell; the stator winding is close to the inner wall of the second shell, and the stator winding is attached to the inner wall of the second shell or attached to the inner wall of the second shell through a heat conducting agent; the flow channel is annular in a plane perpendicular to the axis and is wound around the shell for one circle; the first space comprises a volute, and the first area and the second area are positioned in the volute; the pressure of the first region is greater than the pressure of the second region, the length of the first region at the first aperture and in a direction parallel to the axis being less than the length of the second region at the second aperture and in a direction parallel to the axis; the first area and the second area are respectively located on two sides of the axis symmetry, the first opening and the second opening are respectively located on two sides of the axis symmetry, fluid in the flow channel can be divided into two paths to reach the second opening around each half circle at a relatively uniform flow speed, and therefore the circumferential direction of the second shell can be uniformly radiated.

2. The pump of claim 1, wherein the housing has a receiving chamber at one end thereof in which the motor control unit is disposed, the pump further comprising: a cover for closing the receiving chamber.

3. The pump of claim 1, further comprising: and the isolation cover is arranged in the second space and used for isolating the stator winding from the rotor assembly, the isolation cover divides the second space into a first part of the second space and a second part of the second space which are independent of each other, the stator winding is positioned in the first part of the second space, and the rotor assembly is positioned in the second part of the second space.

4. The pump of claim 3, wherein one end of the cage abuts against an inner wall of the housing, one end of the shaft is inserted into the cage, the other end of the cage abuts against the shaft seat, and a side wall of the other end of the cage abuts against the housing.

5. A hydrogen-powered vehicle characterized by comprising the pump according to any one of claims 1 to 4.