CN210949189U - Two-stage high-speed centrifugal air compressor for hydrogen fuel cell - Google Patents
Two-stage high-speed centrifugal air compressor for hydrogen fuel cell Download PDFInfo
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- CN210949189U CN210949189U CN201921944726.5U CN201921944726U CN210949189U CN 210949189 U CN210949189 U CN 210949189U CN 201921944726 U CN201921944726 U CN 201921944726U CN 210949189 U CN210949189 U CN 210949189U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
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Abstract
The utility model discloses a two-stage high-speed centrifugal air compressor for a hydrogen fuel cell, which comprises a motor rotor, wherein the motor rotor comprises a motor main shaft and a magnet layer, the magnet layer is coated on the outer peripheral surface of the motor main shaft, a low-pressure impeller pull rod and a high-pressure impeller pull rod are respectively arranged at the two ends of the motor main shaft, a low-pressure impeller is arranged on the low-pressure impeller pull rod, and a high-pressure impeller is arranged on the high-pressure impeller pull rod; the motor stator corresponds to the motor rotor and comprises a stator core, and a stator coil is embedded in an inner chute of the stator core; the inner shell is coated on the peripheral surface of the stator core; and the shell is coated on the peripheral surface of the inner shell. The utility model discloses can cover 30-100kW power level hydrogen fuel cell air system's high-speed centrifugal air compressor of type that directly drives, this air compressor machine can satisfy the demand of high pressure ratio, wide flow range, has advantages such as high rotational speed, efficient, longe-lived, do not have oil.
Description
Technical Field
The utility model relates to a hydrogen fuel cell technical field, in particular to hydrogen fuel cell uses high-speed centrifugal air compressor of two-stage.
Background
The hydrogen fuel cell is a device for directly converting chemical energy of hydrogen and oxygen into electric energy, and only generates water and heat through electrochemical reaction, so that the hydrogen fuel cell has no pollution to the environment. The battery operates quietly and the noise is only about 55dB, corresponding to the level at which people talk normally. The generating efficiency of the battery can reach more than 50 percent, and the efficiency is high. The hydrogen fuel cell is a research and development hotspot at present, and a plurality of enterprises begin to develop the hydrogen fuel cell industry, and are expected to realize industrialization within 5-10 years.
The air compressor is one of important parts in a hydrogen fuel cell system, raises oxygen in the ambient atmosphere to a certain pressure, delivers the oxygen to a hydrogen fuel cell reactor, and generates electrochemical reaction with hydrogen to generate electric energy and water; the driving energy of the air compressor comes from the hydrogen fuel cell reactor, and the air compressor and the hydrogen fuel cell reactor form a mutual dependence relationship, so the working characteristics of the air compressor have obvious influence on the hydrogen fuel cell.
Although air compressors are widely used in the industry, large compressors can provide sufficient air supply, but also have excessive capacity; the compressor with smaller volume can not provide enough air supply, so the working performance of the prior industrial air compressor and the use requirement of the vehicle-mounted hydrogen fuel cell are quite different. The air compressor for the hydrogen fuel cell with small volume and light weight becomes one of important factors for enhancing the practicability of the vehicle-mounted hydrogen fuel cell and improving the overall performance of the hydrogen fuel cell automobile.
In addition, a proton exchange membrane in a hydrogen fuel cell reactor needs to work under an oil-free condition, otherwise, the proton exchange membrane can be caused to lose efficacy, so that compressed air which needs to be used as an oxidant cannot contain any oil component, and the existing traditional oil-gas lubrication bearing cannot meet the requirement; because of the energy correlation between the hydrogen fuel cell reactor and the air compressor, the reactor hopes to drive the air compressor by using smaller output electric energy, and simultaneously hopes that the air compressor provides compressed air meeting the pressure requirement as much as possible, namely, the higher requirement is provided for the working efficiency of the air compressor, and the existing Roots type air compressor or double-screw air compressor can not meet the high-efficiency requirement; the vehicle-mounted hydrogen fuel cell is required to be miniaturized and lightened, the whole size of an air compressor is required to be as small as possible, the high-speed air compressor is required to meet the requirements of flow and pressure ratio, the rotating speed of a rotor generally reaches the high-speed state of more than 50000rpm, the problem of rotor dynamics stability is caused, and the problems of heat dissipation and cooling caused by a high-speed rotor are comprehensively considered and solved.
SUMMERY OF THE UTILITY MODEL
For solving the problem that prior art exists, the utility model aims at providing a reasonable in design, simple structure can cover 30-100kW power level hydrogen fuel cell air system's the high-speed centrifugal air compressor of type that directly drives, and this air compressor machine can satisfy the demand of high-pressure ratio, wide flow range, has high rotational speed, efficient, longe-lived, does not have advantages such as oil, can satisfy on-vehicle hydrogen fuel cell demand.
For solving the above technical problem, the utility model discloses a following technical scheme realizes:
a two-stage high-speed centrifugal air compressor for hydrogen fuel cell is characterized by comprising
The motor rotor comprises a motor main shaft and a magnet layer, wherein the magnet layer is coated on the outer peripheral surface of the motor main shaft, a low-pressure impeller pull rod and a high-pressure impeller pull rod are respectively arranged at two ends of the motor main shaft, a low-pressure impeller is arranged on the low-pressure impeller pull rod, and a high-pressure impeller is arranged on the high-pressure impeller pull rod;
the motor stator corresponds to the motor rotor and comprises a stator core, and a stator coil is embedded in an inner chute of the stator core;
the inner shell is coated on the peripheral surface of the stator core;
the motor comprises an inner shell, a motor main shaft, a low-pressure side end cover, a high-pressure side end cover, a low-pressure side ceramic ball bearing, a high-pressure side ceramic ball bearing, a low-pressure volute, a high-pressure volute, a three-phase cable and a low-pressure signal connector, wherein the outer peripheral face of the inner shell is coated with the motor main shaft, the two ends of the motor main shaft are respectively provided with the low-pressure side end cover and the high-pressure side end cover, one end of the motor main shaft is arranged on the low-pressure side end cover through the low-pressure side ceramic ball bearing, the other end of the motor main shaft is arranged on the high-pressure side end cover through the high-pressure side ceramic ball.
In a preferred embodiment of the present invention, the electric motor rotor further includes a carbon fiber protective layer wound around the outer peripheral surface of the magnet layer.
In a preferred embodiment of the present invention, a low-pressure side baffle and a high-pressure side baffle for magnetic isolation are respectively disposed on the motor spindle and at two ends of the magnet layer.
In a preferred embodiment of the present invention, a wave spring washer is provided on the motor spindle between the end of the high-pressure side ceramic ball bearing and the high-pressure side end cap.
In a preferred embodiment of the present invention, the high pressure impeller is fixedly mounted on the high pressure impeller rod through a high pressure impeller preload nut, and the low pressure impeller is fixedly mounted on the low pressure impeller rod through a low pressure impeller preload nut.
In a preferred embodiment of the present invention, the two-stage high-speed centrifugal air compressor for hydrogen fuel cell further comprises a water cooling system, the water cooling system comprises a water inlet joint and a water outlet joint arranged on the housing, the water inlet joint is communicated with the water supply device through a water inlet pipe, the water outlet joint is communicated with the water source recovery device through a water outlet pipe, and a spiral cooling tank communicated with the water inlet joint and the water outlet joint respectively is disposed on the outer peripheral surface of the inner housing.
Compared with the prior art, the utility model adopts the above structure can cover 30-100kW power level hydrogen fuel cell air system's the high-speed centrifugal air compressor machine of type that directly drives, and this air compressor machine can satisfy the demand of high pressure ratio, wide flow range, has advantages such as high rotational speed, efficient, longe-lived, do not have oil, can satisfy on-vehicle hydrogen fuel cell demand.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic diagram of the internal structure of the present invention.
Fig. 3 is a schematic structural view of the motor rotor of the present invention.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand and understand, the present invention is further explained by combining with the specific drawings.
Referring to fig. 1 to 3, there is shown a two-stage high-speed centrifugal air compressor for a hydrogen fuel cell, which includes a motor rotor, a motor stator, an inner casing 19 and a casing 20, and the air compressor drives the motor rotor to rotate through a controller.
The motor rotor comprises a motor main shaft 5 and a magnet layer 7, the magnet layer 7 is coated on the outer peripheral surface of the motor main shaft 5, a low-pressure impeller pull rod 22 and a high-pressure impeller pull rod 15 are respectively arranged at two ends of the motor main shaft 5, a low-pressure impeller 2 is arranged on the low-pressure impeller pull rod 22, a high-pressure impeller 13 is arranged on the high-pressure impeller pull rod 15, the motor main shaft 5 is of a hollow structure in the embodiment, the weight of a rotating part can be effectively reduced, and starting torque is reduced.
The motor rotor further comprises a carbon fiber protective layer 8, the carbon fiber protective layer 8 is wound on the outer peripheral surface of the magnet layer 7, and the carbon fiber protective layer 8 prevents the magnet layer 7 from being broken due to centrifugal force under high-speed rotation.
And a low-pressure side baffle 6 and a high-pressure side baffle 9 are respectively arranged on the motor spindle 5 and at two ends of the magnet layer 7, and the low-pressure side baffle 6 and the high-pressure side baffle 9 are mainly used for magnetic isolation.
The motor stator corresponds with motor rotor, and motor stator includes stator core 18, and the embedded stator coil 17 that is equipped with in stator core 18's interior chute, inner housing 19 cladding are on stator core 18's outer peripheral face, and stator core 18 is folded by the silicon steel sheet and is pressed and form in this embodiment.
The casing 20 is coated on the peripheral surface of the inner casing 19, a low-pressure side end cap 3 and a high-pressure side end cap 11 are respectively arranged at two ends of the casing 20, one end of the motor main shaft 5 is arranged on the low-pressure side end cap 3 through a low-pressure side ceramic ball bearing 4, the other end of the motor main shaft 5 is arranged on the high-pressure side end cap 11 through a high-pressure side ceramic ball bearing 10, and a low-pressure volute 1 which is covered on the low-pressure impeller 2 is arranged on the low-pressure side end cap 3.
A wave spring gasket 16 is arranged on the motor main shaft 5 and between the end of the high-pressure side ceramic ball bearing 10 and the high-pressure side end cover 11, and the wave spring gasket 16 can provide axial pre-tightening force and provide enough axial space under the thermal deformation condition.
By effectively combining the low-pressure side ceramic ball bearing 4 and the high-pressure side ceramic ball bearing 10, volatile oil and gas substances can not be mixed into compressed air under the condition of normal operation of the air compressor, and the oil-free requirement of the hydrogen fuel cell is met.
The low-pressure side end cover 3 is used as an end cover of the motor and also used as a rear end cover of the low-pressure volute 1, the high-pressure side end cover 11 is used as an end cover of the other end of the motor and also used as a rear end cover of the high-pressure volute 12, the axial length of the whole machine can be effectively reduced, the volume of the whole machine is reduced, the dynamic stability of a motor rotor is improved, the low-pressure side end cover 3 is connected with the low-pressure volute 1 through a first clamp, and the high-pressure side end cover 11 is connected with the high-. The low pressure side end cover 3 and the high pressure side end cover 11 are provided with seals at the matching positions with the low pressure impeller 2 and the high pressure impeller 13, so that the leakage amount at the back of the low pressure impeller 2 and the high pressure impeller 13 is reduced.
The high-pressure side end cover 11 is provided with a high-pressure volute 12 covered on a high-pressure impeller 13, the air inlet of the high-pressure volute 12 is communicated with the air outlet of the low-pressure volute 1 through a pipeline, the casing 20 is provided with a three-phase cable 25 and a low-voltage signal connector 24 which are respectively connected with a stator coil 17, and two sides of the lower end of the casing 20 are respectively provided with a motor base 21.
External air is sucked by an air inlet of the low-pressure volute 1, is subjected to primary compression by the low-pressure impeller 2, enters an air inlet of the high-pressure volute 12 through a pipeline, is subjected to secondary compression by the high-pressure impeller 13, and achieves the purpose of two-stage pressurization.
The high-pressure impeller 13 is fixedly arranged on a high-pressure impeller pull rod 15 through a high-pressure impeller pre-tightening nut 14, and the low-pressure impeller 2 is fixedly arranged on a low-pressure impeller pull rod 22 through a low-pressure impeller pre-tightening nut 23.
The air compressor controls the direction of a magnetic field generated by a motor stator through a controller, thereby controlling the rotating speed of a motor rotor, adjusting the aim of outputting air pressure and flow according to the external power output requirement of a fuel cell, changing the stoichiometric ratio of the air of a hydrogen fuel cell stack, improving the electrochemical reaction of hydrogen and oxygen on a membrane electrode of the hydrogen fuel cell, and improving the performance of the fuel cell.
The high-power high-speed permanent magnet motor is adopted to directly drive the low-pressure impeller and the high-pressure impeller to rotate at high speed, the highest rotating speed can reach 80000rpm, mechanical speed increasing mechanisms such as a gear transmission and the like are avoided, the size and the weight of the air compressor are reduced, and gear meshing vibration noise caused by the speed increasing mechanisms is avoided.
The two-stage high-speed centrifugal air compressor for the hydrogen fuel cell further comprises a water cooling system, the water cooling system comprises a water inlet connector 26 and a water outlet connector 27 which are arranged on the shell 20, the water inlet connector 26 is communicated with a water supply device through a water inlet pipeline, the water outlet connector 27 is communicated with a water source recovery device through a water outlet pipeline, spiral cooling grooves which are respectively communicated with the water inlet connector 26 and the water outlet connector 27 are formed in the outer peripheral surface of the inner shell 19, and when the air compressor runs, water flows through the spiral cooling grooves between the shell 20 and the inner shell 19, so that the heat dissipation effect is achieved.
To sum up the utility model adopts the above structure can cover 30-100kW power level hydrogen fuel cell air system's high-speed centrifugal air compressor of type that directly drives, this air compressor machine can satisfy the demand of high pressure ratio, wide flow range, has advantages such as high rotational speed, efficient, longe-lived, do not have oil, can satisfy on-vehicle hydrogen fuel cell demand.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. A two-stage high-speed centrifugal air compressor for hydrogen fuel cell comprises
The motor rotor comprises a motor main shaft and a magnet layer, wherein the magnet layer is coated on the outer peripheral surface of the motor main shaft, a low-pressure impeller pull rod and a high-pressure impeller pull rod are respectively arranged at two ends of the motor main shaft, a low-pressure impeller is arranged on the low-pressure impeller pull rod, and a high-pressure impeller is arranged on the high-pressure impeller pull rod;
the motor stator corresponds to the motor rotor and comprises a stator core, and a stator coil is embedded in an inner chute of the stator core;
the inner shell is coated on the peripheral surface of the stator core;
the motor comprises an inner shell, a motor main shaft, a low-pressure side end cover, a high-pressure side end cover, a low-pressure side ceramic ball bearing, a high-pressure side ceramic ball bearing, a low-pressure volute, a high-pressure volute, a three-phase cable and a low-pressure signal connector, wherein the outer peripheral face of the inner shell is coated with the motor main shaft, the two ends of the motor main shaft are respectively provided with the low-pressure side end cover and the high-pressure side end cover, one end of the motor main shaft is arranged on the low-pressure side end cover through the low-pressure side ceramic ball bearing, the other end of the motor main shaft is arranged on the high-pressure side end cover through the high-pressure side ceramic ball.
2. The two-stage high-speed centrifugal air compressor for the hydrogen fuel cell as claimed in claim 1, wherein: the motor rotor further comprises a carbon fiber protective layer, and the carbon fiber protective layer is wound on the outer peripheral surface of the magnet layer.
3. A two-stage high-speed centrifugal air compressor for a hydrogen fuel cell as claimed in claim 1 or 2, wherein: and a low-pressure side baffle and a high-pressure side baffle for magnetic isolation are respectively arranged on the motor spindle and at two ends of the magnet layer.
4. The two-stage high-speed centrifugal air compressor for the hydrogen fuel cell as claimed in claim 1, wherein: and a wave-shaped spring washer is arranged on the motor main shaft and between the end part of the high-pressure side ceramic ball bearing and the high-pressure side end cover.
5. The two-stage high-speed centrifugal air compressor for the hydrogen fuel cell as claimed in claim 1, wherein: the high-pressure impeller is fixedly installed on the high-pressure impeller pull rod through a high-pressure impeller pre-tightening nut, and the low-pressure impeller is fixedly installed on the low-pressure impeller pull rod through a low-pressure impeller pre-tightening nut.
6. The two-stage high-speed centrifugal air compressor for the hydrogen fuel cell as claimed in claim 1, wherein: the two-stage high-speed centrifugal air compressor for the hydrogen fuel cell further comprises a water cooling system, wherein the water cooling system comprises a water inlet connector and a water outlet connector which are arranged on the shell, the water inlet connector is communicated with a water supply device through a water inlet pipeline, the water outlet connector is communicated with a water source recovery device through a water outlet pipeline, and a spiral cooling groove which is respectively communicated with the water inlet connector and the water outlet connector is formed in the outer peripheral surface of the inner shell.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921944726.5U CN210949189U (en) | 2019-11-12 | 2019-11-12 | Two-stage high-speed centrifugal air compressor for hydrogen fuel cell |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921944726.5U CN210949189U (en) | 2019-11-12 | 2019-11-12 | Two-stage high-speed centrifugal air compressor for hydrogen fuel cell |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111963464A (en) * | 2020-08-27 | 2020-11-20 | 中船重工(重庆)西南装备研究院有限公司 | Self-adaptive air compressor for hydrogen fuel cell |
| CN112253491A (en) * | 2020-09-03 | 2021-01-22 | 上海发电设备成套设计研究院有限责任公司 | Multistage centrifugal supercritical carbon dioxide compressor |
| CN112253493A (en) * | 2020-10-15 | 2021-01-22 | 上海发电设备成套设计研究院有限责任公司 | Air compressor for hydrogen fuel cell |
| CN115853798A (en) * | 2022-11-26 | 2023-03-28 | 黑龙江云造科技有限公司 | Centrifugal air compressor for fuel cell |
-
2019
- 2019-11-12 CN CN201921944726.5U patent/CN210949189U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111963464A (en) * | 2020-08-27 | 2020-11-20 | 中船重工(重庆)西南装备研究院有限公司 | Self-adaptive air compressor for hydrogen fuel cell |
| CN112253491A (en) * | 2020-09-03 | 2021-01-22 | 上海发电设备成套设计研究院有限责任公司 | Multistage centrifugal supercritical carbon dioxide compressor |
| CN112253493A (en) * | 2020-10-15 | 2021-01-22 | 上海发电设备成套设计研究院有限责任公司 | Air compressor for hydrogen fuel cell |
| CN115853798A (en) * | 2022-11-26 | 2023-03-28 | 黑龙江云造科技有限公司 | Centrifugal air compressor for fuel cell |
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