CN220134285U

CN220134285U - Gas circulation pump and fuel cell system

Info

Publication number: CN220134285U
Application number: CN202321176650.2U
Authority: CN
Inventors: 郭晓亮
Original assignee: Weishi Energy Technology Co Ltd
Current assignee: Weishi Energy Technology Co Ltd
Priority date: 2023-05-16
Filing date: 2023-05-16
Publication date: 2023-12-05
Anticipated expiration: 2033-05-16

Abstract

The utility model relates to the technical field of gas pumps, in particular to a gas circulating pump which comprises an impeller assembly and a shell, wherein a heat exchange cavity and an impeller cavity which are separated are arranged in the shell, the impeller assembly is arranged in the impeller cavity, a heat exchange medium and/or a heating piece are arranged in the heat exchange cavity, and the heat exchange cavity and the impeller cavity are provided with at least one common heat-conducting wall surface. When the gas circulation pump is used as a hydrogen circulation pump, the gas circulation pump is provided with the heat exchange chamber with the heat exchange medium and/or the heating piece inside, and the heat released by the heat exchange medium and/or the heating piece is transferred to the impeller chamber, so that the impeller assembly inside the impeller chamber can be heated, frozen and melted, and the normal use of the hydrogen circulation pump can be ensured, thereby ensuring the normal operation of the hydrogen circulation of the fuel cell system. The utility model provides a fuel cell system comprising the gas circulation pump. The fuel cell system can solve the problem that the fuel cell system cannot be normally used because of icing of the hydrogen circulating pump.

Description

Gas circulation pump and fuel cell system

Technical Field

The present utility model relates to the field of gas pumps, and in particular, to a gas circulation pump and a fuel cell system.

Background

The fuel cell system is a device for generating electricity by reacting hydrogen with oxygen in air, and generally comprises a fuel cell system stack, an air supply system, a hydrogen supply system, a cooling circulation system, and an electric power output mechanism. The hydrogen and the oxygen are subjected to electrochemical reaction in the electric pile to generate water, and electrons in the reaction process generate current through directional movement of an external circuit, so that electric energy can be output to the outside through the electric power output mechanism. However, the humidity in the anode cavity is larger after the existing fuel cell system is stopped, condensed water still can be generated after the system is stopped, the condensed water can be gradually frozen in a low-temperature environment, a bearing and an impeller of a hydrogen circulating pump are frozen, and in the cold starting process, the impeller and the bearing of the hydrogen circulating pump are frozen, so that the hydrogen circulation of the system is blocked, the cold starting process is hindered, and the risk that a vehicle using the fuel cell system breaks down exists.

Therefore, there is a need for a gas circulation pump and a fuel cell system that solve the above-mentioned problems.

Disclosure of Invention

One object of the present utility model is to: provided is a gas circulation pump which can solve the problem that a fuel cell system cannot be used normally due to freezing of a hydrogen circulation pump.

To achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a gas circulation pump, includes impeller subassembly and casing, be provided with heat transfer cavity and impeller cavity that separates in the casing, the impeller subassembly sets up in the impeller cavity, heat transfer medium and/or heating member have in the heat transfer cavity, heat transfer cavity with but impeller cavity has at least one common heat conduction wall.

As a preferred embodiment of the gas circulation pump, the projections of the heat exchange chamber and the impeller chamber on a first plane, which passes through the axial direction of the gas circulation pump, have overlapping areas.

As a preferred scheme of gas circulation pump, the casing includes end cover support piece and heat transfer apron, the impeller subassembly includes spacing post of impeller and bearing, the end cover support piece is kept away from the one side of impeller subassembly has seted up the heat transfer recess, the heat transfer apron covers the heat transfer recess is in order to form the heat transfer cavity, be provided with the impeller protrusion in the heat transfer recess, the impeller protrusion orientation is kept away from the direction protrusion setting of impeller subassembly, the impeller protrusion is hollow structure, the bellied back of impeller is the holding tank, the bearing housing is established on the spacing post of impeller, the tip of the spacing post of impeller is located in the holding tank.

As a preferred scheme of gas circulation pump, the impeller subassembly includes the impeller, the impeller cover is established on the bearing, the end cover support piece orientation the impeller recess has been seted up to the one side of impeller subassembly, in order to enclose jointly with other structures of casing and establish and form the impeller cavity, be provided with the heat transfer protrusion in the impeller recess, the heat transfer protrusion orientation the impeller subassembly protrusion sets up, the heat transfer protrusion is hollow structure, the convex back of heat transfer is the heat transfer recess, the impeller with the projection of heat transfer recess on the second plane has the coincidence region, the second plane perpendicular to the axial of gas circulation pump.

As a preferable scheme of the gas circulating pump, a gas inlet and a gas outlet are formed in the groove bottom of the impeller groove in a penetrating mode.

As a preferred scheme of the gas circulation pump, one side of the end cover support piece, which is far away from the impeller assembly, is provided with a liquid inlet groove and a liquid outlet groove which are separated from each other, the heat exchange cover plate covers the liquid inlet groove and the liquid outlet groove to form a liquid inlet pipeline and a liquid outlet pipeline, one ends of the liquid inlet pipeline and the liquid outlet pipeline are communicated with the heat exchange cavity, and the other ends of the liquid inlet pipeline and the liquid outlet pipeline are communicated with the end cover support piece.

As a preferable scheme of the gas circulation pump, the gas circulation pump further comprises a stator coil, the shell further comprises a shielding shell, an inner cavity of the shielding shell is a part of the impeller cavity, the shielding shell is at least partially inserted into the stator coil, and the shielding shell (205) is used for isolating a hydrogen-related area from an electricity-related area.

As a preferred scheme of the gas circulation pump, the casing further comprises a motor housing, one end of the motor housing (206) is connected to the end cover supporting piece (201), an electric appliance chamber is arranged in the motor housing, the stator coil is located in the electric appliance chamber, and the electric appliance chamber and the impeller chamber are arranged at intervals.

As a preferable mode of the gas circulation pump, the outer wall of the motor housing is provided with radiating fins.

Another object of the utility model is: provided is a fuel cell system which can solve the problem that the fuel cell system cannot be used normally due to freezing of a hydrogen circulation pump.

there is provided a fuel cell system including the above-described gas circulation pump.

The utility model has the beneficial effects that:

the utility model provides a gas circulating pump which comprises an impeller assembly and a shell, wherein a heat exchange cavity and an impeller cavity which are separated are arranged in the shell, the impeller assembly is arranged in the impeller cavity, a heat exchange medium and/or a heating piece are arranged in the heat exchange cavity, and the heat exchange cavity and the impeller cavity are provided with at least one common heat-conducting wall surface. When the gas circulating pump is used as a hydrogen circulating pump, as the gas circulating pump is provided with the heat exchange chamber with the heat exchange medium and/or the heating piece inside, the heat released by the heat exchange medium and/or the heating piece can be transferred to the impeller chamber, so that the impeller component inside the impeller chamber is heated, frozen and melted, the normal use of the hydrogen circulating pump can be ensured, and the normal operation of the hydrogen circulation of the fuel cell system is ensured.

The utility model provides a fuel cell system comprising the gas circulation pump. The fuel cell system can solve the problem that the fuel cell system cannot be normally used because of icing of the hydrogen circulating pump.

Drawings

FIG. 1 is a schematic view of a first view of a gas circulation pump according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a second view of a gas circulation pump according to an embodiment of the present utility model;

FIG. 3 is an exploded view of a third view of a gas circulation pump according to an embodiment of the present utility model;

FIG. 4 is an exploded view of a fourth view of a gas circulation pump according to an embodiment of the present utility model;

FIG. 5 is a schematic view of an end cap support according to an embodiment of the present utility model from a first perspective;

FIG. 6 is a schematic structural view of an end cap support according to a second aspect of the present utility model;

FIG. 7 is a schematic view of a heating element according to an embodiment of the present utility model;

FIG. 8 is a schematic view of a heat exchange cover plate according to an embodiment of the present utility model;

FIG. 9 is a schematic view of an impeller assembly according to an embodiment of the present utility model;

fig. 10 is a schematic structural view of a shielding case according to an embodiment of the present utility model.

In the figure:

1. an impeller assembly; 101. an impeller limit column; 102. a bearing; 103. an impeller; 104. a permanent magnet rotor;

2. a housing; 2001. a heat exchange chamber; 20011. a heat exchange groove; 2002. an impeller chamber; 20021. a receiving groove; 20022. an impeller groove; 20023. a gas inlet; 20024. a gas outlet; 2003. a liquid inlet groove; 2004. a liquid outlet groove;

201. an end cap support; 2011. the impeller protrudes; 2012. heat exchanging protrusion;

202. a heat exchange cover plate; 205. a shielding case; 206. a motor housing; 2061. a heat radiation fin; 207. an impeller housing;

3. a heating member;

4. a stator coil;

5. a high-voltage plug connector; 6. a low-voltage plug; 7. heating the plug connector; 8. an air outlet connecting pipe; 9. an air inlet connecting pipe; 10. a liquid outlet connecting pipe; 1001. a liquid outlet; 11. a liquid inlet connecting pipe; 11001. a liquid inlet.

Detailed Description

The technical scheme of the utility model is further described below with reference to the attached drawings and the embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the drawings related to the present utility model are shown.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixed or removable, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

As shown in fig. 1-4, the gas circulation pump of the present embodiment includes an impeller assembly 1 and a housing 2, wherein a heat exchange chamber 2001 and an impeller chamber 2002 are provided in the housing 2, the impeller assembly 1 is provided in the impeller chamber 2002, a heat exchange medium and/or a heating element 3 are provided in the heat exchange chamber 2001, and the heat exchange chamber 2001 and the impeller chamber 2002 have at least one common heat-conductive wall surface.

When the gas circulation pump is used as a hydrogen circulation pump, since the gas circulation pump is provided with the heat exchange chamber 2001 with the heat exchange medium and/or the heating element 3 inside, heat released by the heat exchange medium and/or the heating element 3 can be transferred to the impeller chamber 2002, so that the impeller assembly 1 inside the impeller chamber 2002 is heated, and ice is melted. And because the heat exchange chamber 2001 and the impeller chamber 2002 have at least one common heat-conducting wall surface, the heat transmission efficiency can be ensured, and the ice melting efficiency is further improved. Therefore, the gas circulation pump can realize ice melting under the icing condition so as to ensure that the hydrogen circulation of the fuel cell system is normally carried out.

Preferably, the projections of the heat exchange chamber 2001 and the impeller chamber 2002 on a first plane have an overlapping area, and the first plane passes through the axial direction of the gas circulation pump, so as to further increase the area of the common wall surface of the heat exchange chamber 2001 and the impeller chamber 2002, and further improve the heat transfer efficiency.

As shown in fig. 3-6, preferably, the housing 2 includes an end cover support 201 and a heat exchange cover plate 202, a heat exchange groove 20011 is provided on a surface of the end cover support 201 away from the impeller assembly 1, the heat exchange cover plate 202 covers the heat exchange groove 20011 to form a heat exchange chamber 2001, an impeller protrusion 2011 is provided in the heat exchange groove 20011, the impeller protrusion 2011 protrudes towards a direction away from the impeller assembly 1, the impeller protrusion 2011 is of a hollow structure, and a receiving groove 20021 is provided on a back surface of the impeller protrusion 2011. As shown in fig. 9, the impeller assembly 1 includes an impeller limiting post 101 and a bearing 102, the bearing 102 is sleeved on the impeller limiting post 101, and the end of the impeller limiting post 101 is located in the accommodating groove 20021. That is, the front of the end of the impeller limiting post 101 is the bottom wall of the accommodating groove 20021, that is, the top surface of the impeller protrusion 2011, and the side surface of the impeller limiting post 101 is the side wall of the accommodating groove 20021, that is, the side surface of the impeller protrusion 2011, that is, the inner ring side wall of the heat exchange groove 20011. The design can shorten the distance between the impeller spacing column 101 and the heat exchange groove 20011, improve the heat exchange efficiency between the impeller spacing column 101 and the heat exchange medium in the heat exchange groove 20011 and/or the heating element 3, ensure the ice melting speed and reduce the heat dissipation. Moreover, the design can save the axial dimension of the gas circulating pump and save the space.

As shown in fig. 9, the impeller assembly 1 preferably further comprises an impeller 103, and the impeller 103 is sleeved on the bearing 102. Preferably, the impeller assembly 1 further comprises a permanent magnet rotor 104.

Preferably, the housing 2 further comprises a motor casing 206. One end of the motor housing 206 is connected to the end cap support 201, and the motor housing 206 has an electrical chamber therein, in which the stator coil 4 is located, the electrical chamber being spaced from the impeller chamber 2002.

Optionally, a circuit board is disposed at the inner bottom of the motor housing 206, and the circuit board is connected to the stator coil 4, and by adjusting the current variation in the stator coil 4, the magnetic field variation is realized, so as to control the rotation of the permanent magnet rotor 104.

As shown in fig. 5-6, an impeller groove 20022 is formed on one surface of the end cover support 201 facing the impeller assembly 1, so as to form an impeller chamber 2002 together with other structures of the casing 2, a heat exchange protrusion 2012 is arranged in the impeller groove 20022, the heat exchange protrusion 2012 protrudes towards the impeller assembly 1, the heat exchange protrusion 2012 is of a hollow structure, and the back surface of the heat exchange protrusion 2012 is of a heat exchange groove 20011. The projection of the impeller 103 and the heat exchanging groove 20011 on a second plane has an overlapping area, and the second plane is perpendicular to the axial direction of the gas circulation pump. Namely, the inner ring wall surface of the impeller groove 20022 and the outer ring wall surface of the heat exchange groove 20011 are the same wall surface, and as the impeller 103 is arranged at the impeller groove 20022 and the projection of the impeller 103 and the heat exchange groove 20011 on the second plane has an overlapping area, the distance between the impeller 103 and the heat exchange groove 20011 can be ensured to be short, thereby improving the heat exchange efficiency between the impeller 103 and the heat exchange medium and/or the heating element 3 in the heat exchange groove 20011, ensuring the ice melting speed and reducing the heat dissipation. Moreover, the design can save the axial dimension of the gas circulating pump and save the space.

As shown in fig. 6, the bottom of the impeller groove 20022 is preferably provided with a gas inlet 20023 and a gas outlet 20024 therethrough to ensure gas ingress and egress into the impeller chamber 2002. Preferably, the gas inlet 20023 and the gas outlet 20024 are respectively provided with an inlet adapter 9 and an outlet adapter 8 in a sealing butt joint.

As shown in fig. 6, preferably, a side of the end cover support 201 away from the impeller assembly 1 is further provided with a liquid inlet groove 2003 and a liquid outlet groove 2004 which are spaced apart, and the heat exchange cover plate 202 covers the liquid inlet groove 2003 and the liquid outlet groove 2004 to form a liquid inlet pipeline and a liquid outlet pipeline, one ends of the liquid inlet pipeline and the liquid outlet pipeline are respectively communicated with the heat exchange chamber 2001, and the other ends of the liquid inlet pipeline and the liquid outlet pipeline are respectively communicated with the end cover support 201.

Preferably, in the present embodiment, the heat exchange groove 20011 is disposed at the center of the end cover support 201, the liquid inlet groove 2003 and the liquid outlet groove 2004 are disposed in parallel at intervals, and extend from the heat exchange groove 20011 in a direction pointing to the edge of the end cover support 201, so that the liquid outlet 1001 and the liquid inlet 11001 are both opened at the side of the end cover support 201. Preferably, the liquid outlet 1001 and the liquid inlet 11001 are respectively provided with a liquid outlet connecting pipe 10 and a liquid inlet connecting pipe 11 in a sealing butt joint mode.

The bottom walls and the side walls of the liquid inlet groove 2003 and the liquid outlet groove 2004, which are far away from each other, can also be in direct contact with gas to transfer heat to the gas, so that the heat transfer efficiency is further improved, the ice melting speed is ensured, and the heat dissipation is reduced.

As shown in fig. 7, preferably, the heating element 3 is arranged along with the liquid inlet groove 2003, the liquid outlet groove 2004 and the heat exchange groove 20011, so as to improve the contact area, ensure the heating efficiency, and when the heat exchange medium and the heating element 3 are simultaneously arranged, ensure the heating efficiency of the heating element 3 on the heat exchange medium, and indirectly improve the ice melting efficiency.

Preferably, as shown in fig. 1, a heating plug 7 is provided on an outer wall surface of the end cap support 201, and the heating plug 7 is electrically connected with the heating member 3 so as to supply power to the heating member 3.

As shown in fig. 3-4, the gas circulation pump preferably further comprises a stator coil 4, the housing 2 further comprises a shielding shell 205, the inner cavity of the shielding shell 205 is a part of the impeller chamber 2002, and the shielding shell 205 is at least partially inserted into the stator coil 4. The shielding case 205 is used for isolating the hydrogen-related area from the electricity-related area, so as to prevent hydrogen from entering the electrical equipment chamber, contacting the circuit board or the stator coil 4, and presenting a hydrogen explosion hazard.

Preferably, the housing 2 includes an impeller housing 207, and the shielding housing 205, the impeller housing 207, and the end cap support 201 are sequentially hermetically connected in the axial direction of the gas circulation pump, so that the impeller chamber 2002 is formed. Preferably, the motor housing 206, the shielding housing 205 and the impeller housing 207 together enclose an electrical chamber to ensure the tightness of the electrical chamber.

As shown in fig. 10, the shield casing 205 is preferably cup-shaped with an extended tab at the cup opening to facilitate screwing with the impeller casing 207.

Preferably, the outer wall of the motor housing 206 has heat dissipating fins 2061 thereon to improve the heat dissipation efficiency of the appliance chamber.

As shown in fig. 2, preferably, a high-voltage plug 5 and a low-voltage plug 6 are arranged on the side of the bottom of the motor housing 206 facing away from the electrical chamber, the high-voltage plug 5 is used for supplying power to the gas circulation pump, and the low-voltage plug 6 is used for connecting an external electric signal to control the operation of the gas circulation pump.

The embodiment also provides a fuel cell system including the above gas circulation pump. The fuel cell system can solve the problem that the fuel cell system cannot be normally used because of icing of the hydrogen circulating pump.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. The gas circulation pump is characterized by comprising an impeller assembly (1) and a shell (2), wherein a heat exchange cavity (2001) and an impeller cavity (2002) which are separated are arranged in the shell (2), the impeller assembly (1) is arranged in the impeller cavity (2002), a heat exchange medium and/or a heating piece (3) are arranged in the heat exchange cavity (2001), and the heat exchange cavity (2001) and the impeller cavity (2002) are provided with at least one common heat-conducting wall surface.

2. The gas circulation pump according to claim 1, characterized in that the projections of the heat exchange chamber (2001) and the impeller chamber (2002) on a first plane have a region of coincidence, the first plane passing through the axial direction of the gas circulation pump.

3. The gas circulation pump according to claim 1, wherein the housing (2) comprises an end cover support (201) and a heat exchange cover plate (202), the impeller assembly (1) comprises an impeller limit post (101) and a bearing (102), a heat exchange groove (20011) is formed in one surface, far away from the impeller assembly (1), of the end cover support (201), the heat exchange cover plate (202) covers the heat exchange groove (20011) to form the heat exchange chamber (2001), an impeller protrusion (2011) is arranged in the heat exchange groove (20011), the impeller protrusion (2011) protrudes towards a direction away from the impeller assembly (1), the impeller protrusion (2011) is of a hollow structure, the back surface of the impeller protrusion (2011) is a containing groove (20021), the bearing (102) is sleeved on the impeller limit post (101), and the end part of the impeller limit post (101) is located in the containing groove (20021).

4. A gas circulation pump according to claim 3, wherein the impeller assembly (1) comprises an impeller (103), the impeller (103) is sleeved on the bearing (102), an impeller groove (20022) is formed on one surface of the end cover support (201) facing the impeller assembly (1) so as to form the impeller chamber (2002) together with other structures of the shell (2), a heat exchange protrusion (2012) is arranged in the impeller groove (20022), the heat exchange protrusion (2012) is arranged facing the impeller assembly (1) in a protruding manner, the heat exchange protrusion (2012) is of a hollow structure, the back surface of the heat exchange protrusion (2012) is provided with the heat exchange groove (20011), and the projection of the impeller (103) and the heat exchange groove (20011) on a second plane has a superposition area, and the second plane is perpendicular to the axial direction of the gas circulation pump.

5. The gas circulation pump according to claim 4, characterized in that the groove bottom of the impeller groove (20022) is provided with a gas inlet (20023) and a gas outlet (20024) penetrating.

6. A gas circulation pump according to claim 3, wherein the side of the end cover support (201) away from the impeller assembly (1) is further provided with a liquid inlet groove (2003) and a liquid outlet groove (2004) which are spaced apart, the heat exchange cover plate (202) covers the liquid inlet groove (2003) and the liquid outlet groove (2004) to form a liquid inlet pipeline and a liquid outlet pipeline, one ends of the liquid inlet pipeline and the liquid outlet pipeline are both communicated with the heat exchange chamber (2001), and the other ends of the liquid inlet pipeline and the liquid outlet pipeline are both communicated with the end cover support (201).

7. A gas circulation pump according to any one of claims 3-6, characterized in that the gas circulation pump further comprises a stator coil (4), the housing (2) further comprises a shielding shell (205), an inner cavity of the shielding shell (205) is a part of the impeller chamber (2002), the shielding shell (205) is at least partially inserted into the stator coil (4), and the shielding shell (205) is used for isolating a hydrogen-related area from an electricity-related area.

8. The gas circulation pump according to claim 7, wherein the housing (2) further comprises a motor housing (206), one end of the motor housing (206) being connected to the end cap support (201), the motor housing (206) having an electrical chamber therein, the stator coil (4) being located in the electrical chamber, the electrical chamber being spaced apart from the impeller chamber (2002).

9. The gas circulation pump according to claim 8, characterized in that the motor housing (206) has heat dissipating fins (2061) on its outer wall.

10. A fuel cell system comprising the gas circulation pump according to any one of claims 1 to 9.