CN110886706A - Vehicle-mounted fuel cell gas compressor based on magnetic suspension bearing - Google Patents
Vehicle-mounted fuel cell gas compressor based on magnetic suspension bearing Download PDFInfo
- Publication number
- CN110886706A CN110886706A CN201911005456.6A CN201911005456A CN110886706A CN 110886706 A CN110886706 A CN 110886706A CN 201911005456 A CN201911005456 A CN 201911005456A CN 110886706 A CN110886706 A CN 110886706A
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- magnetic suspension
- impeller
- bearing
- suspension bearing
- primary
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/10—Centrifugal pumps for compressing or evacuating
- F04D17/12—Multi-stage pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/046—Bearings
- F04D29/048—Bearings magnetic; electromagnetic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/5806—Cooling the drive system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/10—Arrangements for cooling or ventilating by gaseous cooling medium flowing in closed circuit, a part of which is external to the machine casing
Abstract
The invention discloses a vehicle-mounted fuel cell gas compressor based on magnetic suspension bearings, which comprises a motor, two magnetic suspension bearings symmetrically arranged on the motor and at least one impeller assembly, wherein the impeller assembly is arranged between the two magnetic suspension bearings, and the motor drives an integrated compressor shaft system positioned between the two magnetic suspension bearings to rotate so as to drive the impeller assembly to compress gas and provide power for an automobile engine. Compared with the traditional air compressor, on one hand, the impeller assembly is arranged on the inner side of the magnetic suspension bearing, so that the quality of the end part of the compressor is reduced, and meanwhile, the bearing shaft diameter of the shaft system is not limited by the size of the bearing, so that the shaft diameter can be increased, the rigidity of the shaft system is improved, the flexible modal frequency is increased, and the highest rotating speed and the power density of the compressor are improved; on the other hand, because the work of the magnetic suspension bearing is not influenced by the disturbance of external air flow, the heat dissipation capacity of the motor is enhanced through the integrated reinforced air channel, the power density of the compressor is further improved, and the volume of the compressor is reduced.
Description
Technical Field
The invention relates to the technical field of vehicle-mounted fuel cell gas compressors, in particular to a vehicle-mounted fuel cell gas compressor based on a magnetic suspension bearing.
Background
Engines of hydrogen powered vehicles require high-speed air compressors with high efficiency and high pressure ratios to provide large flows of high pressure air to the system. The traditional low-speed air compressor adopts a contact bearing, so that the speed is low, the energy density of a motor is low, and the volume is large. The most advanced technology in the industry at present mainly adopts a high-speed air compressor supported by an air bearing, and a motor drives a shaft system to rotate at a high speed under the support of the air bearing to drive radial impellers at two ends or one end outside the bearing to compress air, so that high-pressure and high-flow air supply is provided for an automobile engine. However, since the air bearing needs to be supported by air, the air supply of the air bearing cannot be disturbed, and therefore, the existing air bearing high-speed air compressor can only keep the impeller away from the bearing as far as possible, namely the impeller is installed at two ends (cantilever structure) of the machine, and since the weight of the impeller is at two ends of the bearing and the impeller cannot provide the shafting rigidity, the weight can only be increased, and the flexible mode of the system is greatly reduced. Meanwhile, due to the fact that the diameter of the rotor of the bearing part is limited, the impellers are distributed on the outer side of the bearing, the rigidity of the supporting impellers is low, and the flexible mode of the system is further reduced. The reduction of the flexible mode of the system limits the highest rotating speed which can be reached by the system, thereby reducing the power density of the motor, enlarging the volume of the compressor and simultaneously reducing the compression efficiency of the impeller.
In view of the above, the defects in the prior art are overcome, and a new vehicle-mounted fuel cell gas compressor based on a magnetic suspension bearing is provided to improve the rotor dynamic characteristics, increase the rotation speed and the anti-interference capability of the rotating shaft system of the compressor, and increase the power density and reliability of the compressor, which is a technical problem to be solved in the field.
Disclosure of Invention
The invention aims to provide a vehicle-mounted fuel cell gas compressor based on a magnetic suspension bearing, aiming at the defects of the prior art.
The object of the invention can be achieved by the following technical measures:
according to an embodiment of the present invention, there is provided a magnetic bearing-based vehicle-mounted fuel cell gas compressor, including: the gas compressor comprises a motor, a first magnetic suspension bearing, a second magnetic suspension bearing and at least one impeller assembly, wherein the first magnetic suspension bearing and the second magnetic suspension bearing are symmetrically arranged on the motor, the impeller assembly is arranged between the first magnetic suspension bearing and the second magnetic suspension bearing, and the motor drives an integrated compressor shaft system between the first magnetic suspension bearing and the second magnetic suspension bearing to rotate so as to drive the impeller assembly to compress gas and provide power for an automobile engine.
According to one embodiment of the invention, the motor comprises a rotor and a stator sleeved outside the rotor, and the first magnetic suspension bearing and the second magnetic suspension bearing are respectively arranged at two ends of the rotor.
According to one embodiment of the invention, the impeller assembly is integrated with the rotor, the impeller assembly being provided between the stator and the first magnetic bearing and/or between the stator and the second magnetic bearing.
According to one embodiment of the invention, the two impeller assemblies are respectively a primary impeller and a secondary impeller, the primary impeller and the secondary impeller are symmetrically arranged, the primary impeller is positioned between the stator and the first magnetic suspension bearing, and the secondary impeller is positioned between the stator and the second magnetic suspension bearing.
According to an embodiment of the invention, the primary impeller comprises a primary air inlet and a primary air outlet, a first bearing cooling bypass channel is formed in a gap between the first magnetic suspension bearing and the rotor, external air is converged with the first bearing cooling bypass channel through a first main air inlet channel, is input into the primary air inlet, is conveyed into the primary impeller, is compressed by the primary impeller and then is converted into primary pressure air, and the primary pressure air is output from the primary air outlet to a transmission channel.
According to an embodiment of the present invention, the secondary impeller includes a secondary air inlet and a secondary air outlet, a second bearing cooling bypass channel is formed in a gap between the second magnetic suspension bearing and the rotor, the primary pressure gas in the transmission channel is merged with the second bearing cooling bypass channel through a second main air inlet channel, is input to the secondary air inlet, is conveyed to the interior of the secondary impeller, is compressed by the secondary impeller and then is converted into a secondary pressure gas, and the secondary pressure gas is output to an external space from the secondary air outlet.
According to an embodiment of the present invention, a motor cooling bypass channel is formed between the stator and the rotor, an inlet of the motor cooling bypass channel is communicated with the transmission channel, an outlet of the motor cooling bypass channel is communicated with the transmission channel and/or an external space, the primary pressure gas in the transmission channel enters the motor cooling bypass channel from the inlet, and is discharged to the transmission channel and/or the external space from the outlet after cooling the rotor and the stator.
According to one embodiment of the invention, two inlets are provided, which are respectively provided at two ends of the motor cooling bypass channel, and the outlet is provided in the middle of the motor cooling bypass channel.
According to one embodiment of the invention, two outlets are provided, which are respectively arranged at two ends of the motor cooling bypass channel, and the inlet is arranged in the middle of the motor cooling bypass channel.
Compared with the structure that the impeller components of the traditional fuel cell air compressor are arranged at two ends of the bearing (namely the impeller components are positioned at the outer side of the supporting bearing), the structure that the impeller components are arranged at the inner side of the magnetic suspension bearing greatly reduces the mass of the end part of the compressor, and simultaneously can increase the rigidity of a rotor in a motor by utilizing the rigidity of the impeller components.
Drawings
Fig. 1 is a schematic structural view of a vehicle-mounted fuel cell gas compressor of the present invention.
Fig. 2 is a schematic gas flow diagram of the vehicle fuel cell gas compressor of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Many aspects of the invention are better understood with reference to the following drawings. The components in the drawings are not necessarily to scale. Instead, emphasis is placed upon clearly illustrating the components of the present invention. Moreover, in the several views of the drawings, like reference numerals designate corresponding parts.
The word "exemplary" or "illustrative" as used herein means serving as an example, instance, or illustration. Any embodiment described herein as "exemplary" or "illustrative" is not necessarily to be construed as preferred or advantageous over other embodiments. All of the embodiments described below are exemplary embodiments provided to enable persons skilled in the art to make and use the examples of the disclosure and are not intended to limit the scope of the disclosure, which is defined by the claims. In other instances, well-known features and methods are described in detail so as not to obscure the invention. For purposes of the description herein, the terms "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," and derivatives thereof shall relate to the invention as oriented in fig. 1. Furthermore, there is no intention to be bound by any expressed or implied theory presented in the preceding technical field, background, brief summary or the following detailed description. It is also to be understood that the specific devices and processes illustrated in the attached drawings, and described in the following specification are simply exemplary embodiments of the inventive concepts defined in the appended claims. Hence, specific dimensions and other physical characteristics relating to the embodiments disclosed herein are not to be considered as limiting, unless the claims expressly state otherwise.
Fig. 1 shows a vehicle-mounted fuel cell gas compressor based on magnetic bearings, please refer to fig. 1, which comprises: the gas compressor comprises a motor 10, a first magnetic suspension bearing 20, a second magnetic suspension bearing 30 and at least one impeller assembly, wherein the first magnetic suspension bearing 20 and the second magnetic suspension bearing 30 are symmetrically arranged on the motor 10, the impeller assembly is arranged between the first magnetic suspension bearing 20 and the second magnetic suspension bearing 30, the motor 10 drives an integrated compressor shaft system between the first magnetic suspension bearing 20 and the second magnetic suspension bearing 30 to rotate, and the impeller assembly is driven to compress gas, so that power is provided for an automobile engine.
The first magnetic suspension bearing 20 and the second magnetic suspension bearing 30 of the embodiment jointly form a five-axis active magnetic suspension bearing, compared with the traditional air bearing, the five-axis active magnetic suspension bearing of the embodiment is not affected by compressed air flow, and the anti-interference capability of the shaft system is improved, so that an impeller assembly can be integrated into the shaft system to form an integrated compressor shaft system, compared with the structure that the impeller assembly is arranged at two ends of a motor (namely the impeller assembly is arranged at the outer side of a support bearing) of the traditional vehicle-mounted fuel cell air compressor, the impeller assembly of the embodiment of the invention is arranged at the inner side of the magnetic suspension bearing, the mass at the end part of the compressor is greatly reduced, meanwhile, the rigidity of a rotor in the motor can be increased by utilizing the rigidity of the impeller assembly, the bearing shaft diameter of the shaft system is not limited by the size of the bearing, and the flexible modal frequency is increased, and the maximum rotating speed and the power density of the compressor are improved. In addition, due to the increase of the maximum rotating speed of the compressor, the volume of the impeller assembly of the gas compressor can be reduced, and the working efficiency of the impeller assembly is improved.
Further, referring to fig. 1, the motor 10 includes a rotor 101 and a stator 102 sleeved outside the rotor 101, and the first magnetic bearing 20 and the second magnetic bearing 30 are respectively disposed at two ends of the rotor 101.
Further, referring to fig. 1, an impeller assembly is integrated with the rotor 101, and the impeller assembly is disposed between the stator 102 and the first magnetic bearing 20 and/or between the stator 102 and the second magnetic bearing 30. The integrated compressor shaft system of the present embodiment is composed of a rotor 101 and an impeller assembly.
In one embodiment, the impeller assembly is disposed between the stator 102 and the first magnetic bearing 20 or between the stator 102 and the second magnetic bearing 30. In another embodiment, referring to fig. 1, when two impeller assemblies are provided, the two impeller assemblies are a primary impeller 40 and a secondary impeller 50, the primary impeller 40 and the secondary impeller 50 are symmetrically arranged, the primary impeller 40 is arranged between the stator 102 and the first magnetic suspension bearing 20, and the secondary impeller 50 is arranged between the stator 102 and the second magnetic suspension bearing 30.
Further, referring to fig. 2, fig. 2 is a schematic gas flow direction diagram of a vehicle-mounted fuel cell gas compressor based on a magnetic suspension bearing, a primary impeller 40 includes a primary gas inlet 401 and a primary gas outlet 402, a first bearing cooling bypass channel 60 is formed in a gap between the first magnetic suspension bearing 20 and the rotor 101, external gas is merged with the first bearing cooling bypass channel 60 through a first main gas inlet channel 61, is input into the primary gas inlet 401, is conveyed into the primary impeller 40, is compressed by the primary impeller 40 and is converted into primary pressure gas, and the primary pressure gas is output to a transmission channel 80 from the primary gas outlet 402. The transfer passage 80 is used to transfer the primary pressure gas. In this embodiment, the external air may also directly enter the primary impeller 40 from the primary air inlet 401.
In the embodiment, the first-stage impeller 40 is disposed between the first magnetic bearing 20 and the rotor 101, and the high-speed, large-flow and low-temperature air flow of the first-stage air inlet 401 can rapidly pass through the first magnetic bearing 20 and the rotor 101, so as to take away excess heat, promote heat dissipation, lower the operating temperature of the motor 10, further improve the power density of the compressor, and enhance the reliability of the compressor.
On the basis of the above embodiment, in the present embodiment, referring to fig. 2, the secondary impeller 50 includes a secondary air inlet 501 and a secondary air outlet 502, a second bearing cooling bypass channel 70 is formed in a gap between the second magnetic suspension bearing 30 and the rotor 101, the primary pressure air in the transmission channel 80 is merged with the second bearing cooling bypass channel 70 through the second main air inlet channel 71, input into the secondary air inlet 501, and is conveyed into the secondary impeller 50, and is compressed by the secondary impeller 50 and then converted into the secondary pressure air, and the secondary pressure air is output from the secondary air outlet 502. In this embodiment, the primary pressure gas may also directly enter the inside of the secondary impeller 50 from the secondary gas inlet 501.
In the embodiment, the secondary impeller 50 is disposed between the second magnetic bearing 30 and the rotor 101, and the high-speed, large-flow and low-temperature air flow of the secondary air inlet 501 can rapidly pass through the second magnetic bearing 30 and the rotor 101, so as to take away excess heat, promote heat dissipation, lower the operating temperature of the motor 10, further improve the power density of the compressor, and enhance the reliability of the compressor.
On the basis of the above embodiments, in this embodiment, a motor cooling bypass channel is formed between the stator 102 and the rotor 101, an inlet of the motor cooling bypass channel is communicated with the transmission channel 80, an outlet of the motor cooling bypass channel is communicated with the transmission channel 80 and/or the external space, the primary pressure gas in the transmission channel 80 enters the motor cooling bypass channel from the inlet, and after cooling the rotor 101 and the stator 102, the primary pressure gas is discharged to the transmission channel 80 and/or the external space from the outlet.
In one embodiment, two inlets are provided, which are respectively provided at two ends of the motor cooling bypass channel, and the outlet is provided in the middle of the motor cooling bypass channel. The primary pressure gas enters the gap between the stator 102 and the rotor 101 from the two ends of the motor cooling bypass channel, is output to the transmission channel 80 and/or the external space from the middle of the motor cooling bypass channel, and takes away heat generated in the running process of the stator 102 and the rotor 101. In another embodiment, two outlets are provided, which are respectively provided at two ends of the motor cooling bypass channel, and the inlet is provided in the middle of the motor cooling bypass channel. The primary pressure gas enters the gap between the stator 102 and the rotor 101 from the middle of the motor cooling bypass channel, and is output to the transmission channel 80 and/or the external space from the two ends of the motor cooling bypass channel, so as to take away heat generated in the running process of the stator 102 and the rotor 101.
In the embodiment, the motor cooling bypass channel carries away the excessive heat of the stator 102 and the rotor 101, so that the heat dissipation of the motor 10 is promoted, the operating temperature of the motor 10 is lower, the power density of the compressor is further improved, and the reliability of the compressor is enhanced.
Because the work of the magnetic suspension bearing of the vehicle-mounted fuel cell gas compressor of the embodiment of the invention is not influenced by the disturbance of external air flow, the integrated reinforced air channel formed by the first bearing cooling bypass channel 60, the second bearing cooling bypass channel 70, the transmission channel 80 and the motor cooling bypass channel enhances the heat dissipation capacity of the motor 10, further improves the power density of the compressor and reduces the volume of the compressor.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. An on-board fuel cell gas compressor based on magnetic bearings, characterized in that it comprises: the gas compressor comprises a motor, a first magnetic suspension bearing, a second magnetic suspension bearing and at least one impeller assembly, wherein the first magnetic suspension bearing and the second magnetic suspension bearing are symmetrically arranged on the motor, the impeller assembly is arranged between the first magnetic suspension bearing and the second magnetic suspension bearing, and the motor drives an integrated compressor shaft system between the first magnetic suspension bearing and the second magnetic suspension bearing to rotate so as to drive the impeller assembly to compress gas and provide power for an automobile engine.
2. The vehicle-mounted fuel cell gas compressor as claimed in claim 1, wherein the motor comprises a rotor and a stator sleeved outside the rotor, and the first magnetic suspension bearing and the second magnetic suspension bearing are respectively disposed at two ends of the rotor.
3. The on-board fuel cell gas compressor of claim 2, wherein the impeller assembly is integrated with the rotor, the impeller assembly being disposed between the stator and the first magnetic bearing and/or between the stator and the second magnetic bearing.
4. The on-board fuel cell gas compressor of claim 3, wherein the two impeller assemblies are a primary impeller and a secondary impeller, the primary impeller and the secondary impeller are symmetrically arranged, the primary impeller is located between the stator and the first magnetic suspension bearing, and the secondary impeller is located between the stator and the second magnetic suspension bearing.
5. The vehicle-mounted fuel cell gas compressor as claimed in claim 4, wherein the primary impeller includes a primary gas inlet and a primary gas outlet, a first bearing cooling bypass channel is formed in a gap between the first magnetic suspension bearing and the rotor, and external gas is merged with the first bearing cooling bypass channel through a first main gas inlet channel, is input to the primary gas inlet, is delivered to the interior of the primary impeller, is compressed by the primary impeller, is converted into primary pressure gas, and is output from the primary gas outlet to the delivery channel.
6. The vehicle-mounted fuel cell gas compressor according to claim 5, wherein the secondary impeller includes a secondary gas inlet and a secondary gas outlet, a second bearing cooling bypass channel is formed in a gap between the second magnetic suspension bearing and the rotor, the primary pressure gas in the transfer channel is merged with the second bearing cooling bypass channel through a second main gas inlet channel, is input to the secondary gas inlet, is conveyed to the inside of the secondary impeller, is compressed by the secondary impeller and is converted into a secondary pressure gas, and the secondary pressure gas is output from the secondary gas outlet to an external space.
7. The vehicle-mounted fuel cell gas compressor according to claim 6, wherein a motor cooling bypass passage is formed between the stator and the rotor, an inlet of the motor cooling bypass passage communicates with the transfer passage, an outlet of the motor cooling bypass passage communicates with the transfer passage and/or an external space, and the primary pressure gas in the transfer passage enters the motor cooling bypass passage from the inlet, and is discharged to the transfer passage and/or the external space from the outlet after cooling the rotor and the stator.
8. The vehicle-mounted fuel cell gas compressor according to claim 7, wherein two inlets are provided, one at each end of the motor cooling bypass passage, and the other at the center of the motor cooling bypass passage.
9. The vehicle-mounted fuel cell gas compressor according to claim 7, wherein two outlets are provided, one at each end of the motor cooling bypass passage, and the other at the center of the motor cooling bypass passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911005456.6A CN110886706B (en) | 2019-10-22 | 2019-10-22 | Vehicle-mounted fuel cell gas compressor based on magnetic suspension bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911005456.6A CN110886706B (en) | 2019-10-22 | 2019-10-22 | Vehicle-mounted fuel cell gas compressor based on magnetic suspension bearing |
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| Publication Number | Publication Date |
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| CN110886706A true CN110886706A (en) | 2020-03-17 |
| CN110886706B CN110886706B (en) | 2021-03-19 |
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| CN201911005456.6A Active CN110886706B (en) | 2019-10-22 | 2019-10-22 | Vehicle-mounted fuel cell gas compressor based on magnetic suspension bearing |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116357592A (en) * | 2023-04-07 | 2023-06-30 | 山东华东风机有限公司 | Magnetic suspension air compression system and working method |
| CN116498574A (en) * | 2023-06-29 | 2023-07-28 | 鸿陆智能科技(山东)有限公司 | Magnetic suspension double suction type centrifugal compressor |
| CN117006073A (en) * | 2023-08-22 | 2023-11-07 | 苏州氢启新能源科技有限公司 | Self-pressurizing cooling hydrogen fuel cell air compressor |
| CN117514852A (en) * | 2023-10-20 | 2024-02-06 | 广东聚磁动力科技有限公司 | Magnetic suspension compressor, control method and device thereof and storage medium |
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| CN116498574A (en) * | 2023-06-29 | 2023-07-28 | 鸿陆智能科技(山东)有限公司 | Magnetic suspension double suction type centrifugal compressor |
| CN117006073A (en) * | 2023-08-22 | 2023-11-07 | 苏州氢启新能源科技有限公司 | Self-pressurizing cooling hydrogen fuel cell air compressor |
| CN117514852A (en) * | 2023-10-20 | 2024-02-06 | 广东聚磁动力科技有限公司 | Magnetic suspension compressor, control method and device thereof and storage medium |
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| Publication number | Publication date |
|---|---|
| CN110886706B (en) | 2021-03-19 |
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