CN216044519U - Low-power consumption hydrogen circulating pump - Google Patents
Low-power consumption hydrogen circulating pump Download PDFInfo
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- CN216044519U CN216044519U CN202122135365.3U CN202122135365U CN216044519U CN 216044519 U CN216044519 U CN 216044519U CN 202122135365 U CN202122135365 U CN 202122135365U CN 216044519 U CN216044519 U CN 216044519U
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- rotor assembly
- impeller
- volute
- power consumption
- magnetic suspension
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Abstract
The utility model relates to a hydrogen fuel reaction system, in particular to a low-power consumption hydrogen circulating pump. A low-power consumption hydrogen circulating pump comprises a pump shell, a rotor assembly and a magnetic suspension supporting system for supporting the rotor assembly in a suspending manner in the pump shell, wherein the magnetic suspension supporting system comprises an axial magnetic suspension bearing and a radial magnetic suspension bearing; the pump shell comprises a cooling shell, a front volute and a rear volute which are respectively arranged at two ends of the cooling shell, and the front volute, the rear volute and the cooling shell form a chamber sealed with the outside together; an expansion impeller is arranged in the front volute and is positioned at one end of the rotor assembly; a compression impeller is arranged in the rear volute and is positioned at the other end of the rotor assembly; the expansion impeller receives the kinetic energy of the high-pressure working medium to drive the rotor assembly to rotate, so that the compression impeller is driven to rotate and the low-pressure working medium is compressed. The utility model has the advantages of lower power consumption and energy saving.
Description
Technical Field
The utility model relates to a hydrogen fuel reaction system, in particular to a low-power consumption hydrogen circulating pump.
Background
The operating principle of the hydrogen fuel cell is as follows: the hydrogen is sent to an anode plate (cathode) of the electric pile, electrons in hydrogen atoms are separated under the action of a catalyst, hydrogen ions (protons) losing the electrons pass through a proton exchange membrane and reach a cathode plate (anode) of the electric pile, the electrons cannot pass through the proton exchange membrane, and the electrons reach the cathode plate of the fuel cell through an external circuit and generate current in the external circuit so as to obtain electric energy. After reaching the cathode plate, the protons recombine with oxygen atoms and hydrogen ions to form water. Since oxygen supplied to the cathode plate can be obtained from the air, electric power can be continuously supplied as long as hydrogen is continuously supplied to the anode plate, air is supplied to the cathode plate, and water vapor is timely taken away.
Wherein, the supply flow of hydrogen to the pile is greater than the flow that the pile consumed, for the waste of avoiding hydrogen, can pressurize the hydrogen that circulates to the hydrogen entry of pile again from pile exhaust through the hydrogen circulating pump, realizes the circulation recycle of hydrogen.
In order to ensure long-term hydrogen supply to the electric pile, hydrogen is stored in a high-pressure state in a gas source. In order to ensure that hydrogen enters the galvanic pile smoothly, a pressure reducing valve is adopted to expand and reduce the pressure of high-pressure hydrogen, and then the reduced-pressure hydrogen is introduced into the galvanic pile.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a low-power consumption hydrogen circulating pump which can realize expansion decompression, compression pressurization, integration of expansion and compression and lower power consumption in use.
In order to achieve the purpose, the utility model adopts the following technical scheme: a low-power consumption hydrogen circulating pump comprises a pump shell, a rotor assembly and a magnetic suspension supporting system for supporting the rotor assembly in a suspending manner in the pump shell, wherein the magnetic suspension supporting system comprises an axial magnetic suspension bearing and a radial magnetic suspension bearing; the pump shell comprises a cooling shell, a front volute and a rear volute which are respectively arranged at two ends of the cooling shell, and the front volute, the rear volute and the cooling shell form a chamber sealed with the outside together; an expansion impeller is arranged in the front volute and is positioned at one end of the rotor assembly; a compression impeller is arranged in the rear volute and is positioned at the other end of the rotor assembly, and the expansion impeller and the compression impeller rotate synchronously; the expansion impeller receives the kinetic energy of the high-pressure working medium to drive the rotor assembly to rotate, so that the compression impeller is driven to rotate and the low-pressure working medium is compressed.
The expansion impeller and the compression impeller are respectively arranged at the two ends of the rotor component, when a high-pressure working medium enters the pump shell, the high-pressure working medium can drive the expansion impeller to do work and rotate, the high-pressure working medium is subjected to the resistance of the expansion impeller and the rotor component to realize pressure reduction, and meanwhile, as the expansion impeller, the compression impeller and the rotor component are fixed and linked, the compression impeller can synchronously rotate and compress and pressurize the low-pressure working medium. The utility model can utilize the energy of the high-pressure working medium to drive the compression impeller at the other end of the rotor component to rotate, and even an electronic stator mechanism required by a conventional motor to drive the rotor shaft to rotate can be not arranged in the pump shell under the condition that the kinetic energy of the high-pressure working medium is enough.
The axial magnetic suspension bearing and the radial magnetic suspension bearing are not limited by the rotating speed of the mechanical bearing, the rotor assembly is not required to be supported by the mechanical bearing, the lubricating and sealing problems of the mechanical bearing are not required to be considered, hydrogen cannot be polluted by lubricating oil, the high-speed rotation of the rotor assembly can be ensured, and the functions of expansion, decompression and compression pressurization can be ensured. The magnetic suspension bearing can isolate the vibration transmission of the motor stator mechanism and the motor rotor mechanism to a great extent, and has the advantages of low noise, high reliability and longer service life; meanwhile, compared with other pneumatic bearings, the passive non-contact bearing with the active control can also realize more active control of the motor and feedback of the state of the rotating shaft.
Preferably, a motor stator mechanism for adjusting the rotating speed of the rotor assembly is arranged in the cooling machine shell, and a motor rotor mechanism matched with the motor stator mechanism is arranged on the rotor assembly. Through setting up motor stator mechanism to supplementary drive rotor subassembly and rotate, or realize the regulation of rotor subassembly rotational speed.
Preferably, when the rotating speed of the expansion impeller exceeds the rotating speed required by the compression impeller, the motor stator mechanism works in a generator mode to convert the redundant kinetic energy of the expansion impeller into electric energy; when the rotational speed of the expansion impeller is lower than that required by the compression impeller, the motor stator mechanism works in a motor mode, and the rotational speed of the rotor assembly is increased to match that required by the compression impeller. The motor stator mechanism and the motor rotor mechanism are arranged correspondingly by selecting the existing motor structure according to actual needs.
Preferably, the air inlet end of the front volute is located on the radial side of the rotor assembly and used for receiving high-pressure working media, the air outlet end of the front volute is located on the axial side of the rotor assembly, the air inlet end of the rear volute is located on the other axial side of the rotor assembly and used for receiving low-pressure working media, and the air outlet end of the rear volute is located on the radial side of the rotor assembly. The arrangement ensures that the compression impeller can compress and pressurize the low-pressure working medium when the high-pressure working medium applies work to the expansion impeller. The gas outlet end of the front volute and the gas outlet end of the rear volute are both used for being communicated with a hydrogen inlet of the hydrogen fuel cell stack, the gas inlet end of the front volute is used for being connected with a high-pressure hydrogen source filled with a high-pressure working medium, and the gas inlet end of the rear volute is communicated with a hydrogen outlet of the hydrogen fuel cell stack.
Preferably, the rotor assembly, the expansion impeller and the compression impeller form a suspension support with the cooling machine shell through the set of axial magnetic suspension bearings and the two sets of radial magnetic suspension bearings.
Preferably, at least one end of the two ends of the cooling shell is provided with a comb tooth structure for realizing dynamic sealing with the expansion impeller or the compression impeller. Through setting up the dynamic seal in order to avoid the mutual influence between high pressure working medium and the low pressure working medium, wherein, dynamic seal structure can't realize sealed completely, but a small amount of high pressure working medium gets into in the cooling casing, can also cool off rotor subassembly.
Preferably, the cooling casing is composed of a casing body and a connecting section, the inner diameter of the casing body is gradually reduced from one end to the other end, the connecting section is located at the end with the smaller inner diameter of the casing body, the connecting section is provided with an extending portion extending towards the circumferential inner side, and the end face of the casing body far away from the connecting section or the extending portion is provided with the labyrinth structure. The inner diameter of the machine shell body is gradually reduced from one end to the other end, so that the assembly and the positioning of parts in the cooling shell are facilitated. The arrangement of the extension part of the connecting section and the arrangement of the step structure of the casing body are convenient for the arrangement of the grate structure and the assembly of parts in the cooling casing.
Preferably, an outer limiting protrusion extending towards the circumferential outer side is arranged at the position of the cooling machine shell deviated from the end part, and the front volute or the rear volute is sleeved at the end part of the cooling machine shell and is close to the outer limiting protrusion; the cooling machine shell is provided with two limiting bulges, and the two limiting bulges are respectively used for positioning and fixing the front volute and the rear volute. Wherein, preceding spiral case and back spiral case are direct to be connected with cooling body, act as the front and back end cover part of cooling casing, enable the cooling casing simpler. Wherein, various sealing modes can be adopted between the front volute and the rear volute and the casing, such as glue sealing, sealing ring sealing and the like. The end parts of the front volute and the rear volute are sleeved outside the end part of the cooling machine shell and are fixed, so that the front volute and the rear volute cannot move radially relative to the cooling machine shell, an effective avoidance space between the impeller and the inner wall of the volute can be ensured, and the impeller and the volute are prevented from being in contact collision. The outer limiting part is also used for limiting the axial position of the front volute and the rear volute, so that the air inlet and outlet ends of the volutes and the impeller are positioned at a set position after the volute is assembled.
Preferably, the group of axial magnetic suspension bearings and the group of radial magnetic suspension bearings are fixed in a fixing piece with an annular cross section, and the fixing piece is fixed with the inner wall of the cooling machine shell. The two groups of magnetic suspension bearings are integrated through the fixing piece to form an independent part, so that the magnetic suspension bearing is convenient to assemble and store.
Preferably, the surfaces of the motor stator mechanism and the motor rotor mechanism are both provided with protective layers. Wherein, can scribble the protective layer of anticorrosion on the motor rotor mechanism surface. The motor stator mechanism can be encapsulated, so that a protective layer is formed on the surface of the motor stator mechanism.
The utility model utilizes the energy of the high-pressure working medium to drive the compression impeller at the other end of the rotor component to rotate, can reduce the electric energy supply to the utility model, even can cancel the arrangement of a motor stator mechanism in the pump shell of the utility model, and has the advantages of lower use power consumption and energy saving. Meanwhile, the utility model has the advantages of integration of expansion and compression, namely, the expansion and decompression of the high-pressure working medium can be realized, and the compression and pressurization of the low-pressure working medium can be realized.
Drawings
FIG. 1 is a schematic structural diagram of the present invention;
fig. 2 is a schematic diagram of the present invention in use.
Detailed Description
The utility model is further described below with reference to the figures and specific embodiments.
As shown in fig. 1 and 2, the low power consumption hydrogen circulation pump of the present invention includes a pump housing, a rotor assembly 100, and a magnetic suspension support system for supporting the rotor assembly 100 in the pump housing; the pump shell comprises a cooling machine shell 1, a front volute 2 and a rear volute 3 which are respectively arranged at two ends of the cooling machine shell 1, and the front volute 2, the rear volute 3 and the cooling machine shell 1 form a chamber sealed with the outside together; an expansion impeller 21 is arranged in the front volute 2, and the expansion impeller 21 is positioned at one end of the rotor assembly 100; a compression impeller 31 is arranged in the rear volute 3, the compression impeller 31 is positioned at the other end of the rotor assembly 100, and the expansion impeller 21 and the compression impeller 31 rotate synchronously; the expansion impeller 21 receives the kinetic energy of the high-pressure working medium to drive the rotor assembly 100 to rotate, so as to drive the compression impeller 31 to rotate and compress the low-pressure working medium.
The air inlet end 201 of the front volute 2 is located on the radial side of the rotor assembly 100 and used for receiving high-pressure working media, the air outlet end 202 of the front volute 2 is located on the axial side of the rotor assembly 100, the air inlet end 301 of the rear volute 3 is located on the other axial side of the rotor assembly 100 and used for receiving low-pressure working media, and the air outlet end 302 of the rear volute 3 is located on the radial side of the rotor assembly 1. The gas outlet end 202 of the front volute 2 and the gas outlet end 302 of the rear volute 3 are both used for being communicated with a hydrogen inlet of the hydrogen fuel cell stack, the gas inlet end 201 of the front volute 2 is used for being connected with a high-pressure hydrogen source filled with high-pressure hydrogen, and the gas inlet end 301 of the rear volute 3 is communicated with a hydrogen outlet of the hydrogen fuel cell stack.
A motor stator mechanism 200 for adjusting the rotation speed of the rotor assembly 100 is further arranged in the cooling machine shell 1, and a motor rotor mechanism matched with the motor stator mechanism 200 is arranged on the rotor assembly 100. The motor stator mechanism 200 and the motor rotor mechanism of the present embodiment are both structures of the existing motor for realizing the rotation of the motor rotor shaft. Wherein, the surfaces of the motor stator mechanism 200 and the motor rotor mechanism are both provided with protective layers.
The control method of the embodiment comprises the following steps: when the rotating speed of the expansion impeller exceeds the rotating speed required by the compression impeller, the motor stator mechanism works in a generator mode to convert the redundant kinetic energy of the expansion impeller into electric energy; when the rotational speed of the expansion impeller is lower than that required by the compression impeller, the motor stator mechanism works in a motor mode, and the rotational speed of the rotor assembly is increased to match that required by the compression impeller.
The magnetic suspension support system of the present embodiment includes a set of axial magnetic suspension bearings 300 and two sets of radial magnetic suspension bearings 400, and the rotor assembly 100, the expansion impeller 21 and the compression impeller 31 form a suspension support with the cooling enclosure 1 through the set of axial magnetic suspension bearings 300 and the two sets of radial magnetic suspension bearings 400. In the embodiment, a set of axial magnetic bearings 300 and a set of radial magnetic bearings 400 are fixed in a fixing member 14 with an annular cross section, and the fixing member 14 is fixed with the inner wall of the cooling casing 1.
The cooling machine shell 1 is composed of a machine shell body 11 and a connecting section 12, the inner diameter of the machine shell body 1 is gradually reduced from one end to the other end, the connecting section 12 is located at one end with the smaller inner diameter of the machine shell body 1, the connecting section 12 is provided with an extending part 121 extending towards the circumferential inner side, and the end face of the extending part 121 is provided with a labyrinth structure 13 used for realizing dynamic sealing with the expansion impeller 21. A radial magnetic suspension bearing of this embodiment is fixed at the first step structure of the casing body 1, the stator core of the motor stator mechanism is fixed at the second step structure of the casing body 1, and the fixing member 14 is fixed at the third step structure of the casing body 1.
The cooling machine shell 1 is provided with outer limiting bulges 10 extending towards the outer circumferential side at the positions of the two deviated end parts, the two limiting bulges 10 are respectively used for positioning and fixing the front volute 2 and the rear volute 3, one limiting bulge 10 is arranged on the connecting section 12, and the other limiting bulge 10 is arranged on the machine shell body 11.
The utility model utilizes the energy of the high-pressure working medium to drive the compression impeller at the other end of the rotor component to rotate, can reduce the electric energy supply to the utility model, even can cancel the arrangement of a motor stator mechanism in the pump shell of the utility model, and has the advantages of lower use power consumption and energy saving. Meanwhile, the utility model has the advantages of integration of expansion and compression, namely, the expansion and decompression of the high-pressure working medium can be realized, and the compression and pressurization of the low-pressure working medium can be realized.
Claims (10)
1. A low-power consumption hydrogen circulating pump is characterized by comprising a pump shell, a rotor assembly and a magnetic suspension supporting system for supporting the rotor assembly in a suspending manner in the pump shell, wherein the magnetic suspension supporting system comprises an axial magnetic suspension bearing and a radial magnetic suspension bearing; the pump shell comprises a cooling shell, a front volute and a rear volute which are respectively arranged at two ends of the cooling shell, and the front volute, the rear volute and the cooling shell form a chamber sealed with the outside together; an expansion impeller is arranged in the front volute and is positioned at one end of the rotor assembly; a compression impeller is arranged in the rear volute and is positioned at the other end of the rotor assembly, and the expansion impeller and the compression impeller rotate synchronously; the expansion impeller receives the kinetic energy of the high-pressure working medium to drive the rotor assembly to rotate, so that the compression impeller is driven to rotate and the low-pressure working medium is compressed.
2. The low power consumption hydrogen circulation pump according to claim 1, wherein a motor stator mechanism for adjusting the rotation speed of the rotor assembly is disposed in the cooling housing, and a motor rotor mechanism cooperating with the motor stator mechanism is disposed on the rotor assembly.
3. The low power consumption hydrogen circulation pump according to claim 2, wherein when the rotation speed of the expansion impeller exceeds the rotation speed required by the compression impeller, the motor stator mechanism works in a generator mode to convert the excess kinetic energy of the expansion impeller into electric energy;
when the rotational speed of the expansion impeller is lower than that required by the compression impeller, the motor stator mechanism works in a motor mode, and the rotational speed of the rotor assembly is increased to match that required by the compression impeller.
4. The low power consumption hydrogen circulation pump according to claim 1, wherein the air inlet end of the front volute is located at a radial side of the rotor assembly for receiving high pressure working medium, the air outlet end of the front volute is located at an axial side of the rotor assembly, the air inlet end of the rear volute is located at the other axial side of the rotor assembly for receiving low pressure working medium, and the air outlet end of the rear volute is located at the radial side of the rotor assembly.
5. The low power consumption hydrogen circulation pump according to claim 1, wherein the rotor assembly, the expansion impeller and the compression impeller are suspended and supported by a set of the axial magnetic suspension bearings and two sets of the radial magnetic suspension bearings and the cooling housing.
6. The low power consumption hydrogen circulation pump according to claim 1, wherein at least one end of the two ends of the cooling casing is provided with a comb structure for realizing dynamic sealing with the expansion impeller or the compression impeller.
7. The low power consumption hydrogen circulation pump according to claim 6, wherein the cooling casing comprises a casing body and a connecting section, the inner diameter of the casing body gradually decreases from one end to the other end, the connecting section is located at the end with the smaller inner diameter of the casing body, the connecting section has an extending portion extending toward the inner circumferential side, and the end surface of the casing body away from the connecting section or the extending portion has the labyrinth structure.
8. The low-power consumption hydrogen circulation pump according to claim 1, wherein an outer limit protrusion extending to the circumferential outside is provided at the offset end of the cooling casing, and the front volute or the rear volute is sleeved at the end of the cooling casing and is close to the outer limit protrusion; the cooling machine shell is provided with two limiting bulges, and the two limiting bulges are respectively used for positioning and fixing the front volute and the rear volute.
9. The low power consumption hydrogen circulation pump according to claim 5, wherein the axial magnetic suspension bearings and the radial magnetic suspension bearings are fixed in a fixing member having an annular cross section, and the fixing member is fixed to the inner wall of the cooling casing.
10. The low power consumption hydrogen circulation pump according to claim 2, wherein the motor stator means and the motor rotor means are provided with protective layers on their surfaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122135365.3U CN216044519U (en) | 2021-09-06 | 2021-09-06 | Low-power consumption hydrogen circulating pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122135365.3U CN216044519U (en) | 2021-09-06 | 2021-09-06 | Low-power consumption hydrogen circulating pump |
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| Publication Number | Publication Date |
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| CN216044519U true CN216044519U (en) | 2022-03-15 |
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| CN202122135365.3U Active CN216044519U (en) | 2021-09-06 | 2021-09-06 | Low-power consumption hydrogen circulating pump |
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| CN (1) | CN216044519U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113606162A (en) * | 2021-09-06 | 2021-11-05 | 北京昆腾迈格技术有限公司 | Energy-saving hydrogen circulating pump |
-
2021
- 2021-09-06 CN CN202122135365.3U patent/CN216044519U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113606162A (en) * | 2021-09-06 | 2021-11-05 | 北京昆腾迈格技术有限公司 | Energy-saving hydrogen circulating pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220818 Address after: 1st Floor, Building 8, No. 161, No. 17 Street, Baiyang Street, Qiantang District, Hangzhou City, Zhejiang Province, 310018 Patentee after: Hangzhou Hydrogen Magnetic Electromechanical Technology Co., Ltd. Address before: No. 410, 4th floor, shining building, No. 35 Xueyuan Road, Haidian District, Beijing 100083 Patentee before: Beijing Kuntengmig Technology Co.,Ltd. |
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| TR01 | Transfer of patent right |