CN211059037U - Hydrogen pump and electric vehicle - Google Patents
Hydrogen pump and electric vehicle Download PDFInfo
- Publication number
- CN211059037U CN211059037U CN201921120763.4U CN201921120763U CN211059037U CN 211059037 U CN211059037 U CN 211059037U CN 201921120763 U CN201921120763 U CN 201921120763U CN 211059037 U CN211059037 U CN 211059037U
- Authority
- CN
- China
- Prior art keywords
- pump
- hydrogen
- base
- motor
- protrusions
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 55
- 239000001257 hydrogen Substances 0.000 title claims abstract description 51
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 51
- 239000000446 fuel Substances 0.000 claims description 6
- 239000012528 membrane Substances 0.000 claims description 5
- 238000004880 explosion Methods 0.000 abstract description 6
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Landscapes
- Fuel Cell (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The application relates to a hydrogen pump and electric vehicle, the hydrogen pump includes motor and the pump of arranging with the motor is coaxial, and the pump includes base member and the pump cover that links to each other with base member detachably, prescribes a pump chamber between base member and the pump cover, and the pump is still including holding in impeller in the pump chamber, the base member has the centre bore that runs through, and the motor includes the casing and holds the motor shaft in the casing, and the motor shaft extends outside the casing and extends the centre bore entering of base member in the pump chamber, the impeller is connected to the tip that is located in the pump chamber of motor shaft, wherein the pump cover with be provided with first labyrinth seal structure between the surface that faces each other of base member, and be provided with second labyrinth seal structure between the internal surface of the centre bore of the partial surface of casing and base member. Through the arrangement of the labyrinth seal structure, the moving path of hydrogen and air is prolonged, the movement of the hydrogen and the air in the motor and the cavity is reduced, and the danger of motor explosion is prevented.
Description
Technical Field
The present invention relates to a hydrogen pump used in a hydrogen circulation system of a proton exchange membrane fuel cell electric vehicle, and more particularly, to a sealing device used in the hydrogen pump.
Background
In such a device, since the molecular weight of hydrogen is very small, it is easy to move between the interface interfaces of the components, resulting in leakage of hydrogen into the motor and further into the engine, which may lead to the risk of explosion, and in a conventional hydrogen pump, leakage usually occurs at two locations, one at the interface between the pump cover and the base and one at the interface between the motor cover and the base. For this reason, it is desirable to provide a hydrogen pump having an improved sealing effect at both of these locations.
SUMMERY OF THE UTILITY MODEL
The hydrogen pump can reduce the leakage of hydrogen at the joints of various parts, and effectively prevents potential explosion risks caused by hydrogen leakage.
Therefore, the application provides a hydrogen pump for a hydrogen circulation system of an electric vehicle with a proton exchange membrane fuel cell, the hydrogen pump comprises a motor and a pump which is coaxially arranged with the motor, the pump comprises a base body and a pump cover which is detachably connected with the base body, a pump cavity is defined between the base body and the pump cover, the pump further comprising an impeller housed in the pump chamber, the base having a central bore therethrough, the motor includes a housing and a motor shaft received in the housing, the motor shaft extending out of the housing and through the central hole of the base into the pump chamber, the impeller being connected to an end of the motor shaft located in the pump chamber, wherein a first labyrinth seal is provided between the mutually facing surfaces of the pump cover and the base body, and a second labyrinth seal is provided between an outer surface of a portion of the housing and an inner surface of the central bore of the base.
Optionally, a portion of the first labyrinth seal is an integral portion of the pump cap and another portion of the first labyrinth seal is an integral portion of the base.
Optionally, a plurality of annular rib-shaped protrusions extend from the surface of the pump cover facing the base, an annular groove is defined between the protrusions, a plurality of annular rib-shaped protrusions corresponding to the grooves on the pump cover and an annular groove located between the protrusions and corresponding to the protrusions on the pump cover extend from the surface of the base facing the pump cover, and the first labyrinth seal structure is formed by the protrusions and the groove on the base and the pump cover.
Optionally, a portion of the second labyrinth seal is an integral part of the pump cover and another portion of the second labyrinth seal is an integral part of the housing of the electric machine.
Optionally, the housing of the motor has a collar extending from an end surface of the housing and inserted into the central bore, a plurality of annular rib-shaped protrusions extending from an outer surface of the collar, each protrusion defining an annular groove therebetween, and a plurality of annular rib-shaped protrusions corresponding to the grooves on the collar and annular grooves between the protrusions and corresponding to the protrusions on the collar extend from an inner surface of the central bore of the base, the second labyrinth structure being formed by the central bore and the protrusions and grooves on the collar.
Optionally, a first auxiliary seal is arranged between the base body and the pump cover on the radial outside of the first labyrinth seal.
Optionally, the first auxiliary seal is an O-ring or bowl seal.
Optionally, a second auxiliary seal is arranged between the collar and the base body on the side of the second labyrinth seal facing the electric machine.
Optionally, the second auxiliary seal is an O-ring or bowl seal.
Optionally, the protrusions and grooves in the first labyrinth seal structure have a cross section in a radial direction that is rectangular, semicircular, triangular, trapezoidal, or a combination thereof.
Optionally, the protrusions and grooves in the second labyrinth seal structure have a cross section in a radial direction that is rectangular, semicircular, triangular, trapezoidal, or a combination thereof.
The application also relates to an electric vehicle which is a proton exchange membrane fuel cell electric vehicle and comprises the hydrogen pump.
The labyrinth seal structure is arranged at the joint between each component of the hydrogen pump, so that the possible moving path of hydrogen and air is prolonged, the sealing performance of the easy-leakage part of the hydrogen pump is further improved, and the hydrogen is prevented from leaking into the motor and preventing the explosion risk possibly caused in the internal combustion engine.
Drawings
The foregoing and other aspects of the present application will be more fully understood from the following detailed description, taken together with the following drawings. It is noted that the drawings may not be to scale for clarity of illustration and will not detract from the understanding of the present application. In the drawings:
fig. 1 is a sectional view of a hydrogen pump according to an embodiment of the present application.
Fig. 2 is an enlarged view of the first labyrinth seal structure in fig. 1.
Fig. 3 is an enlarged view of the second labyrinth seal structure in fig. 1.
Detailed Description
In the various figures of the present application, features that are structurally identical or functionally similar are denoted by the same reference numerals.
Fig. 1 is a sectional view of a hydrogen pump according to one embodiment of the present application, which includes a pump 1 and a motor 2 that are coaxially arranged, the pump 1 having a base body 3 and a pump cover 4 detachably attached to the base body 3, the base body 3 and the pump cover 4 each being formed with an inner cavity, a chamber 5 being defined between the base body 3 and the pump cover 4 when the base body 3 and the pump cover 4 are assembled together, an impeller 6 being accommodated in the chamber 5, and rotation of the impeller 6 introducing hydrogen from an inlet of the chamber 5 and discharging hydrogen from an outlet of the chamber 5, thereby completing pumping of hydrogen.
The base body 3 has a centrally arranged through-going central opening 8, the electric motor 2 has a motor housing 9 and a motor shaft 7, the motor shaft 7 extends outside the motor housing 9 and through the central opening 8 of the base body 3 into the chamber 5, and the impeller 6 is mounted centrally on the end of the motor shaft 7 extending into the chamber 5.
In the present case, the motor housing 9 has a collar 11 extending from an end face 10 of the motor housing, the collar 11 being inserted into the central bore 8 of the base body 3, the motor shaft 7 extending through the collar 11 into the cavity 5, and the motor shaft 7 being rotatably supported on the inner wall of the collar 11 by means of bearings 14, 15.
The impeller 6 is detachably mounted on the motor shaft 7, and when the motor 2 is switched on, the motor shaft 7 rotates, so that the impeller 7 is driven to rotate to pump hydrogen.
In general, leakage of hydrogen gas easily occurs at the connection portion 16 of the base 3 and the pump cover 4, so that hydrogen gas flows out of the pump and further into the engine, increasing the possibility of explosion, and air also easily enters the chamber 5 through the connection portion 16, reducing the concentration of hydrogen gas, further reducing the reaction efficiency of the fuel cell.
Likewise, such hydrogen gas leaks and air ingress are also liable to occur at the connection 17 between the motor housing 9, in particular the collar 11, and the central bore 8 of the base body 3, and are extremely fatal and need to be avoided.
For this reason, the present application provides specific sealing structures at the connection portions 16 and 17, respectively, and a detailed structure of the connection portion 16 is shown in an enlarged view in fig. 2, and a detailed structure of the connection portion 17 is shown in an enlarged view in fig. 3.
As shown in fig. 2, the connection portion 16 includes a first labyrinth structure 20, the first labyrinth structure 20 being formed by integral portions of the pump cover 4 and the base 3, respectively, and specifically, the surface of the pump cover 4 facing the base 3 is provided with a plurality of protrusions 41 and recesses 42 located between the protrusions 41, which are alternately arranged in the radial direction, and these protrusions 41 and recesses 42 are in the shape of annular ribs and grooves extending in the circumferential direction as viewed from the surface of the pump cover 4 facing the base 3, although it is shown in fig. 2 that the width of the recesses 42 in the radial direction is slightly larger than the width of the protrusions 41 in the radial direction, and the height of the protrusions 41 is equal to the depth of the recesses 42, but may be varied as required.
Also, the surface of the base 3 facing the pump cover 4 is provided with a plurality of alternating protrusions 31 and depressions 32, and these protrusions 31 and depressions 32 are also in the shape of annular convex ribs and grooves when viewed from the surface of the base 3 facing the pump cover 4, and although it is shown in fig. 2 that the width of the depression 32 in the radial direction is slightly larger than the width of the protrusion 31 in the radial direction and the height of the protrusion 31 is equal to the depth of the depression 32, it may be varied according to actual needs as long as the protrusion 41 of the pump cover 4 can be inserted into the depression 32 of the base 3 and the protrusion 31 of the base 3 can be simultaneously inserted into the depression 42 of the pump cover 4 when the pump cover 4 and the base 3 are mated.
In addition, although fig. 2 shows that the protrusion 31 and the recess 32 of the base 3 have a rectangular shape in cross section, the present application is not limited thereto, and the sectional shape of the protrusion 31 may be a triangle, a trapezoid, a semicircle, or a combination of these shapes, and correspondingly, the cross sectional shapes of the recess 42 and the protrusion 41 of the pump cover 4 that are fitted with the protrusion 31 and the recess 32 of the base 3 should also be a triangle, a trapezoid, a semicircle, or a combination of these shapes.
Such a labyrinth seal increases the length of the path that the gas will travel when passing on both sides of the seal, thereby preventing the passage of gas.
As shown in fig. 2, a first flexible seal 12 arranged circumferentially, such as an O-ring like rubber seal shown in fig. 2, is further provided radially outward of the first labyrinth seal structure 20 (i.e., outermost of the connection portion 20) and between the pump cover 4 and the base body 3, but may not be limited thereto, and various other flexible seals known in the art, such as a bowl-shaped rubber seal, an oval-shaped rubber seal, or the like, may be provided. The diameter of the first flexible seal 12 (or its dimension in the axial direction in the case of other shaped seals) is slightly larger than the gap between the facing surfaces of the pump cap 4 and the base 3, so that the flexible seal 12 presses against both surfaces.
As shown in fig. 3, the connecting portion 17 includes a second labyrinth structure 30, which second labyrinth structure 30 is similar in construction to the first labyrinth structure 20, but is disposed axially between the collar 11 and the central bore 9 of the base body 3, and specifically, the inner wall of the central bore 9 of the base body 3 is provided with a plurality of axially alternating projections 33 and depressions 34, which projections 33 and depressions 34 are in the shape of annular ribs and grooves extending in the circumferential direction, although it is shown in fig. 3 that the width of the depression 34 in the axial direction is slightly larger than the width of the projection 33 in the axial direction, and the height of the projection 33 is equal to the depth of the depression 34, but may be varied as desired.
Also, a plurality of protrusions 111 and depressions 112 are provided on the outer surface of the neck ring 11 alternately in the axial direction, and these protrusions 111 and depressions 112 are in the shape of annular ribs and grooves extending in the circumferential direction, and although it is shown in fig. 3 that the width of the depression 112 in the axial direction is slightly larger than the width of the protrusion 111 in the axial direction, and the height of the protrusion 111 is equal to the depth of the depression 112, it may be changed as needed as long as the protrusion 111 of the neck ring 11 can be inserted into the depression 34 of the base body 3 and the protrusion 33 of the base body 3 can be simultaneously inserted into the depression 112 of the neck ring 11 when the neck ring 11 and the base body 3 are mated.
In addition, although the protrusion 33 and the recess 34 of the base 3 are shown in fig. 3 as being rectangular in cross-sectional shape, the present application is not limited thereto, and the cross-sectional shapes of the protrusion 33 and the recess 34 may be triangular, trapezoidal, semicircular, or a combination thereof, and accordingly, the cross-sectional shapes of the recess 112 and the protrusion 111 of the neck ring 11, which are fitted with the protrusion 33 and the recess 34 of the base 3, should also be triangular, trapezoidal, semicircular, or a combination thereof.
As shown in fig. 3, a second flexible seal 13 arranged circumferentially, for example, an O-ring like rubber seal, is further provided between the collar 11 and the base body 3 on the side of the second labyrinth 30 axially close to the motor, but it is not limited thereto, and various other flexible seals known in the art, for example, a bowl-shaped rubber seal, an oval rubber seal, etc., may be provided. The diameter of this second flexible seal 13 (or its radial dimension in the case of other shapes) is slightly greater than the gap between the outer surface of the collar 11 and the inner wall of the central hole of the base body 3, so as to press against both surfaces.
In the hydrogen pump of the present application adopting the above-described structure, by providing the first labyrinth structure at the joint between the base body 3 and the pump cover 4 and providing the second labyrinth structure at the joint between the motor housing 9 and the base body 3, the transmission path of hydrogen/air between the inside and the outside of the pump chamber and between the hydrogen/air pump chamber and the motor becomes longer, leakage of hydrogen to the inside and the outside of the motor and leakage of air into the pump chamber are reduced, and further the possibility of explosion in the motor that may occur due to the mixture of hydrogen and air is prevented, and the possibility of reduction in the hydrogen concentration in the pump chamber is also reduced.
In addition, in the hydrogen pump of the present application, by providing additional first and second flexible seals at the first and second labyrinth structures, undesired transmission of hydrogen and air is further prevented, increasing the sealing performance.
Although specific embodiments of the present application have been described herein in detail, they have been presented for purposes of illustration only and are not to be construed as limiting the scope of the application. Various substitutions, alterations, and modifications may be conceived without departing from the spirit and scope of the present application.
Claims (12)
1. A hydrogen pump is used for a hydrogen circulation system of an electric vehicle with a proton exchange membrane fuel cell and is characterized by comprising a motor and a pump which is coaxially arranged with the motor,
the pump comprises a base body and a pump cover detachably connected with the base body, a pump cavity is defined between the base body and the pump cover, the pump also comprises an impeller accommodated in the pump cavity, the base body is provided with a through central hole,
the motor includes a housing and a motor shaft received in the housing, the motor shaft extending out of the housing and through the central hole of the base into the pump chamber, the impeller being connected to an end of the motor shaft located in the pump chamber,
wherein a first labyrinth seal is provided between mutually facing surfaces of the pump cover and the base, and a second labyrinth seal is provided between an outer surface of a portion of the housing and an inner surface of the central bore of the base.
2. A hydrogen pump according to claim 1, characterized in that a part of the first labyrinth seal structure is an integral part of the pump cover and another part of the first labyrinth seal structure is an integral part of the base.
3. A hydrogen pump according to claim 2, characterized in that the pump cap has a number of annular rib-shaped protrusions extending from its base-facing surface, an annular groove being defined between the protrusions, and a number of annular rib-shaped protrusions corresponding to the grooves on the pump cap and an annular groove between the protrusions and corresponding to the protrusions on the pump cap extending from its base-facing surface, the first labyrinth seal being formed by the protrusions and grooves on both the base and the pump cap.
4. A hydrogen pump according to claim 1, characterized in that a part of the second labyrinth seal structure is an integral part of the pump cover and another part of the second labyrinth seal structure is an integral part of a housing of the motor.
5. The hydrogen pump of claim 4 wherein the housing of the motor has a collar extending from an end face of the housing and inserted into the central bore, the collar having a plurality of annular rib-shaped protrusions extending from an outer surface of the collar, the protrusions defining annular grooves therebetween, and the central bore of the base having a plurality of annular rib-shaped protrusions extending from an inner surface of the central bore corresponding to the grooves in the collar and annular grooves between the protrusions and corresponding to the protrusions in the collar, the second labyrinth seal being formed by the central bore and the protrusions and grooves in the collar.
6. The hydrogen pump according to claim 1, characterized in that a first auxiliary seal is provided between the base and the pump cover on a radially outer side of the first labyrinth seal structure.
7. The hydrogen pump according to claim 6, wherein the first auxiliary seal is an O-ring or bowl seal.
8. The hydrogen pump of claim 5 wherein a second auxiliary seal is provided between the collar and the base on a side of the second labyrinth seal facing the motor.
9. The hydrogen pump of claim 8 wherein the second auxiliary seal is an O-ring or bowl seal.
10. A hydrogen pump according to claim 2, wherein the projections and grooves in the first labyrinth seal structure have a cross section in the radial direction that is rectangular, semicircular, triangular, trapezoidal, or a combination thereof.
11. The hydrogen pump according to claim 4, wherein the protrusions and grooves in the second labyrinth seal structure have a cross section in a radial direction that is rectangular, semicircular, triangular, trapezoidal, or a combination thereof.
12. An electric vehicle characterized in that the electric vehicle is a proton exchange membrane fuel cell electric vehicle and comprises the hydrogen pump according to any one of claims 1 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921120763.4U CN211059037U (en) | 2019-07-17 | 2019-07-17 | Hydrogen pump and electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921120763.4U CN211059037U (en) | 2019-07-17 | 2019-07-17 | Hydrogen pump and electric vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211059037U true CN211059037U (en) | 2020-07-21 |
Family
ID=71587426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921120763.4U Active CN211059037U (en) | 2019-07-17 | 2019-07-17 | Hydrogen pump and electric vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211059037U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113757118A (en) * | 2021-10-20 | 2021-12-07 | 聊城大学 | Pump structure, vacuum pump, gas compressor, hydraulic pump and hydraulic motor |
-
2019
- 2019-07-17 CN CN201921120763.4U patent/CN211059037U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113757118A (en) * | 2021-10-20 | 2021-12-07 | 聊城大学 | Pump structure, vacuum pump, gas compressor, hydraulic pump and hydraulic motor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5966786B2 (en) | Variable capacity turbocharger | |
| US4403910A (en) | Pump apparatus | |
| CN109737094B (en) | Dynamic sealing device for turbine pump and turbine pump set | |
| JP6177421B2 (en) | Seal structure and supercharger provided with the seal structure | |
| CN112178204B (en) | Labyrinth type magnetic liquid sealing device | |
| CN211059037U (en) | Hydrogen pump and electric vehicle | |
| KR101457824B1 (en) | Shaft seal mechanism and rotary machine provided with same | |
| CN114790988A (en) | Shielding electric pump with motor shaft two-end transmission pump structure | |
| CN110259818A (en) | A kind of gear pump and its bearing assembly | |
| KR20200051391A (en) | Sealing member for a multi direction changeover valve and multi direction changeover valve including thereof | |
| CN219691763U (en) | Pump with a pump body | |
| JP6559717B2 (en) | mechanical seal | |
| JP2022187473A (en) | canned motor | |
| JP4580711B2 (en) | Electric motor fuel pump | |
| US20220170458A1 (en) | Cartridge vane pump and pump device | |
| CN210240037U (en) | Hydrogen pump and electric vehicle | |
| CN219062054U (en) | Sealing structure of back cavity of compressor impeller and compressor | |
| CN217874163U (en) | Adjustable flexible contact type steam seal ring | |
| JP2020056360A (en) | Liner ring and rotary machine | |
| CN217029229U (en) | Sealing piece shell and sealing structure of compressor and compressor | |
| KR101130819B1 (en) | Seal device for engine pump | |
| CN221075169U (en) | Sealing ring assembly for shaft and speed reducer | |
| CN220857783U (en) | Cooling tube, electric drive assembly and vehicle | |
| CN116576149A (en) | Combined sealing structure for turbine pump and liquid rocket engine | |
| JP6950649B2 (en) | Internal combustion engine seal structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |