An air suspension centrifugal blower for fuel cells

Abstract

The present invention discloses an air suspension centrifugal blower for a fuel cell, which includes a motor and a compressor. The motor includes a motor base with two open ends, a motor main shaft is arranged in the motor base, and a stator surrounding the motor main shaft is also arranged in the motor base. Two compressors are provided, and both compressors include compressor casings; the two compressor casings are respectively arranged at the two ends of the motor base; two impellers are respectively arranged at the two ends of the motor main shaft, and the two impellers are respectively located in the two compressor casings; the two compressor casings are connected by a connecting pipe. The air suspension blower for the fuel cell system of the present invention can compress the air in two stages and provide compressed air with a higher pressure to meet the hydrogen-oxygen reaction of the fuel cell system for power generation.

Description

Technical Field

[0001] The invention relates to the technical field of air suspension blowers, and in particular to an air suspension blower for a fuel cell. Background Art

[0002] Hydrogen fuel cells directly output electrical energy through chemical reactions between hydrogen and oxygen. The power of hydrogen fuel cells is directly related to the air supply density pressure and air flow rate of the air supply system. The higher the air supply pressure and the higher the oxygen content, the faster the fuel cell reaction speed and the higher the energy conversion rate.

[0003] In the prior art, single-stage compressors and dual-pressure parallel air suspension centrifugal blowers are usually used. The above structure uses the compressor housing to inhale air at the air pressure end and directly discharge it from the air outlet to provide compressed air. For fixed hydrogen fuel cell power generation and various environments requiring high-pressure air supply, the pressure of compressed air can reach more than 150KPa. The pressure of compressed air generated by single-stage compressors and dual-pressure parallel air suspension centrifugal blowers is relatively low, which is difficult to ensure the use of fuel cell systems.

[0004] In addition, the air suspension centrifugal blower has high pressure, and the rotor rubs violently with the surrounding air and the air is compressed at high pressure, generating a large amount of heat energy, which causes the rotor and bearing temperature to rise and deform. The heat will also be transferred to the motor base and motor, which may cause high-temperature failure of the bearing. Under the action of high pressure and high speed, the temperature of the motor stator will also rise rapidly. If it cannot be cooled in time, excessive heat will affect the service life of the insulation material, reduce the output power of the motor, and even cause the motor to burn out. Summary of the invention

[0005] In order to overcome the above defects, the technical problem solved by the present invention is to provide an air suspension blower for a fuel cell. The air suspension blower for the fuel cell system of the present invention can provide compressed air with a relatively high pressure to meet the needs of the fuel cell system for hydrogen-oxygen reaction to generate electricity.

[0006] In order to solve the above technical problems, the present invention provides an air suspension centrifugal blower for a fuel cell, comprising a motor and a compressor; the motor comprises a motor base with open ends, a motor main shaft is arranged in the motor base, and a stator surrounding the motor main shaft is also arranged in the motor base; two compressors are provided, and both compressors include a compressor casing; the two compressor casings are respectively arranged at the two ends of the motor base; two impellers are respectively arranged at the two ends of the motor main shaft, and the two impellers are respectively located in the two compressor casings; the two compressor casings are connected by a connecting pipe.

[0007] Furthermore, the motor main shaft includes a rotor shaft, and two connecting shafts are fixedly connected to both ends of the rotor shaft, respectively. The two connecting shafts are a left connecting shaft and a right connecting shaft, respectively. The left connecting shaft is connected to the left end of the rotor shaft, and the right connecting shaft is fixedly connected to the right end of the rotor shaft; the two impellers are a left impeller and a right impeller, respectively. The left impeller is fixedly connected to the left connecting shaft, and the right impeller is fixedly connected to the right connecting shaft; a thrust plate is provided at the right end of the rotor shaft.

[0008] Furthermore, the two ends of the motor base are respectively fixedly connected with a left connecting plate and a right connecting plate; the two compressor casings are respectively a left compressor casing and a right compressor casing, the left compressor casing is fixedly connected to the left connecting plate, and the right compressor casing is fixedly connected to the right connecting plate.

[0009] Furthermore, the motor main shaft is rotatably mounted on the left main shaft bearing seat and the right main shaft bearing seat; a thrust bearing seat is also arranged in the motor seat, and the right main shaft bearing seat and the thrust bearing seat are fixedly connected to the right connecting plate.

[0010] Furthermore, a sealing plate is fixedly connected to the thrust bearing seat, and the sealing plate is arranged between the right impeller and the thrust bearing seat; the sealing plate is provided with inner serrations and side serrations; the right impeller is provided with right impeller serrations that are compatible with the side serrations.

[0011] Furthermore, the air suspension centrifugal blower for the fuel cell also includes an air cooling structure; the air cooling structure includes a branch pipe, one end of the branch pipe is connected to the connecting pipe, and the other end of the branch pipe is connected to the interior of the motor base; a cooling air jacket is arranged in the motor base, and a blind groove and a through groove are axially arranged on the outer peripheral surface of the cooling air jacket, and annular grooves are radially arranged at both ends of the cooling air jacket, and the two annular grooves are respectively a left end annular groove and a right end annular groove; a motor base air outlet is also arranged on the motor base, and the motor base air outlet is connected to the gap at the left end of the inside of the motor base.

[0012] Further, the motor seat is provided with a motor seat air hole, and the motor seat air hole is connected with the right end ring groove, the right spindle bearing seat is provided with a right spindle bearing seat air hole B, and the right spindle bearing seat air hole is connected with the motor seat air hole, the thrust bearing seat is provided with a thrust bearing seat ventilation groove, and the thrust bearing seat ventilation groove is connected with the right spindle bearing seat air hole B, and the thrust bearing seat ventilation groove extends to the inner cavity of the thrust bearing seat, the thrust plate and the thrust bearing and the right spindle bearing seat are all provided with a first gap that is connected, the right spindle bearing seat air hole B is provided with a right spindle bearing seat air hole B branch hole, and the right spindle bearing seat air hole B branch hole is connected with the first gap; the right spindle bearing seat is provided with a right spindle bearing, and a second gap is provided between the right spindle bearing and the spindle, the first gap is connected with the second gap, and the second gap is connected with the gap at the left end of the motor seat.

[0013] Furthermore, a motor seat through hole is provided on the motor seat, a right spindle bearing seat air hole A is provided on the right spindle bearing seat, and a sealing plate air hole is provided on the sealing plate. The sealing plate air hole is connected with the motor seat through hole through the thrust bearing seat air hole and the right spindle bearing seat air hole A.

[0014] Furthermore, a cooling water jacket is provided inside the motor base, the cooling water jacket is provided between the stator and the cooling air jacket, the stator is attached to the inner wall of the cooling water jacket, the cooling air jacket is attached to the outer wall of the cooling water jacket, the outer wall of the cooling water jacket is provided with a cooling water channel, and the motor base is provided with a water inlet and a water outlet connected to the cooling water channel.

[0015] Furthermore, a flow meter is provided at the air inlet of the right compressor casing.

[0016] After adopting the above technical solution, the beneficial effect of the present invention is that the air suspension centrifugal blower for fuel cells includes a motor and a compressor. The motor includes a motor base with open ends, a motor main shaft is arranged in the motor base, and a stator surrounding the motor main shaft is also arranged in the motor base. There are two compressors, and both compressors include compressor casings; the two compressor casings are respectively arranged at the two ends of the motor base; two impellers are respectively arranged at the two ends of the motor main shaft, and the two impellers are respectively located in the two compressor casings; the two compressor casings are connected by a connecting pipe. The air suspension blower for the fuel cell system of the present invention can compress the air in two stages and provide compressed air with a higher pressure to meet the hydrogen-oxygen reaction of the fuel cell system for power generation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1is a perspective view of an air suspension centrifugal blower for a fuel cell of the present invention;

[0018] Figure 2 yes Figure 1 An enlarged stereoscopic view of the middle motor base;

[0019] Figure 3 yes Figure 1 An enlarged perspective view of the middle cooling water jacket;

[0020] Figure 4 yes Figure 1 An enlarged stereogram of the middle cooling air jacket;

[0021] Figure 5 yes Figure 1 an enlarged perspective view of the middle sealing plate;

[0022] Figure 6 yes Figure 1 An enlarged stereoscopic view of the thrust bearing housing;

[0023] Figure 7 yes Figure 1 The first sectional view;

[0024] Figure 8 yes Figure 7 A magnified view of region A;

[0025] Fig. 9 yes Figure 1 The second cross-sectional view;

[0026] Fig.10 yes Fig. 9 Enlarged view of area B;

[0027] Fig.11 yes Figure 1 The third sectional view;

[0028] Fig.12 yes Fig.11 Enlarged view of the middle C area;

[0029] Fig.13 yes Figure 1 the fourth sectional view;

[0030] Fig.14 yes Fig.13 Enlarged view of area D in the middle;

[0031] In the figure, the direction of the arrow indicates the flow direction of the gas;

[0032] In the figure: 1, flow meter; 2, right impeller; 21, right impeller sawtooth; 3, left impeller; 4, motor seat; 41, motor seat air outlet; 42, motor seat air hole; 43, motor seat through hole; 44, gap; 51, rotor shaft; 52, right connecting shaft; 53, left connecting shaft; 6, cooling air jacket; 61, blind groove; 62, through groove; 63, left end ring groove; 64, right end ring groove; 7, cooling water jacket; 71, cooling water channel; 8, sealing plate; 81, inner sawtooth; 82, side sawtooth; 83, sealing plate air hole; 9, right main shaft Bearing seat; 91, right main shaft bearing seat air hole A; 92, right main shaft bearing seat air hole B; 921, right main shaft bearing seat air hole B branch hole; 10, right compressor casing; 11, left compressor casing; 12, thrust bearing seat; 121, thrust bearing seat ventilation groove; 122, thrust bearing seat air hole; 13, thrust plate; 14, left main shaft bearing seat; 15, left connecting plate; 16, stator; 17, connecting pipe; 18, branch pipe; 19, right connecting plate; 200, first gap; 300, second gap; 400, third gap. DETAILED DESCRIPTION

[0033] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0034] Combination Figure 1 , Figure 7 , Fig. 9 , Fig.11 ,as well as Fig.13 As shown together, an air suspension centrifugal blower for a fuel cell includes a motor and a compressor. The motor includes a motor seat 4 with open ends, a motor main shaft is arranged in the motor seat 4, and a stator 16 surrounding the motor main shaft is also arranged in the motor seat 4; the motor main shaft includes a rotor shaft 51, and two connecting shafts are fixedly connected at both ends of the rotor shaft 51, and the two connecting shafts are respectively a left connecting shaft 53 and a right connecting shaft 52; threaded holes are arranged at both ends of the rotor shaft 51, and the right end of the left connecting shaft 53 and the left end of the right connecting shaft 52 are respectively tightened to the threaded holes at both ends of the rotor shaft 51 through the external threads arranged on the outer walls thereof.

[0035] There are two compressors, namely the left compressor and the right compressor. Both compressors include compressor casings; the two compressor casings are respectively arranged at the two ends of the motor base 4; two impellers are respectively arranged at the two ends of the motor main shaft, and the two impellers are respectively located in the two compressor casings; the two compressor casings are respectively the left compressor casing 11 and the right compressor casing 10, a left connecting plate 15 is fixedly connected to the left end of the motor base 4, the left compressor casing 11 is fixedly connected to the left connecting plate 15, a right connecting plate 19 is fixedly connected to the right end of the motor base 4, and the right compressor casing 10 is fixedly connected to the right connecting plate 19; the two impellers are respectively the left impeller 3 and the right impeller 2, the left impeller 3 is arranged in the left compressor casing 11, and the right impeller 2 is arranged in the right compressor casing 10. The left impeller 3 is fixedly connected to the left connecting shaft 53, and the right impeller 2 is fixedly connected to the right connecting shaft 52.

[0036] The left compressor casing 11 and the right compressor casing 10 are both provided with an air inlet and an air outlet, and a flow meter 1 is provided at the air inlet of the right compressor casing 10. The left compressor casing 11 and the right compressor casing 10 are connected through a connecting pipe 17, that is, the air outlet of the right compressor casing 10 is connected to the air inlet of the left compressor casing 11, and the air after two-stage compression is discharged through the air outlet of the left compressor casing 11.

[0037] Combination Figure 1 as well as Figure 2 As shown together, the motor base 4 is provided with a motor base air outlet 41 , a motor base air hole 42 , and a motor base through hole 43 .

[0038] Combination Figure 1 as well as Figure 3 As shown in the figure, a cooling air jacket 6 is arranged in the motor base 4, and the outer peripheral surface of the cooling air jacket 6 is fitted on the inner wall surface of the motor base 4. Preferably, the motor base 4 and the cooling air jacket 6 are interference fit. A blind groove 61 and a through groove 62 are axially arranged on the outer peripheral surface of the cooling air jacket 6, and a plurality of through grooves 62 are arranged at intervals. Both ends of the cooling air jacket 6 are radially arranged with annular grooves, and the two annular grooves are respectively a left end annular groove 63 and a right end annular groove 64.

[0039] Combination Figure 1 as well as Figure 4 As shown in common, a cooling water jacket 7 is also provided inside the motor base 4, and the cooling water jacket 7 is provided between the stator 16 and the cooling air jacket 6, the stator 16 is attached to the inner wall of the cooling water jacket 7, and the stator 16 is preferably fixedly connected to the inner wall of the cooling water jacket 7, the cooling air jacket 6 is attached to the outer wall of the cooling water jacket 7, and the outer wall of the cooling water jacket 7 is provided with a cooling water channel 71, and the motor base 4 is provided with a water inlet and a water outlet connected to the cooling water channel 71.

[0040] Combination Figure 1 , Figure 7 , Fig. 9 , Fig.11,as well as Fig.13 As shown in the figure, the rotor shaft 51 of the motor main shaft is rotatably mounted on the left main shaft bearing seat 14 and the right main shaft bearing seat 9; a thrust bearing seat 12 is also provided in the motor seat 4. The right main shaft bearing seat 9 and the thrust bearing seat 12 are fixedly mounted on the right connecting plate 19; the left main shaft bearing seat 14 and the left connecting plate 15 are fixedly mounted on the motor seat 4 together by bolts, and the outer walls of the left main shaft bearing seat 14 and the right main shaft bearing seat 9 are positioned and matched with the inner walls at both ends of the motor seat 4.

[0041] The right end of the rotor shaft 51 is connected to the right main shaft bearing seat 9 through the right main shaft bearing, and the right main shaft bearing is a radial bearing (clockwise); the left end of the rotor shaft 51 is connected to the left main shaft bearing seat 14 through the left main shaft bearing, and the left main shaft bearing is a radial bearing (counterclockwise); the stator 16 is fixedly mounted on the inner wall of the cooling water jacket 7, and the rotor shaft 51 is inserted into the inner cavity of the stator 16 and rotates freely.

[0042] Combination Figure 1 , Figure 5 , Figure 6 ,as well as Figure 7 As shown in the figure, the thrust bearing seat 12 is also fixedly connected with a sealing plate 8, which is arranged between the right impeller 2 and the thrust bearing seat 12; the inner cavity of the sealing plate 8 is provided with an inner sawtooth 81, and the side sawtooth 82 is provided on the side of the sealing plate 8; the right impeller 2 is provided with a right impeller sawtooth 21 adapted to the side sawtooth 82. The side sawtooth 82 and the right impeller sawtooth 21 are used for sealing, which can reduce the loss of flow, so that the air compressed by the right compressor can be discharged from the air outlet of the right compressor casing 10 as much as possible, and enter the left compressor casing 11 through the connecting pipe 17 for further compression.

[0043] Combination Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 ,as well as Fig.12 As shown together, the air suspension centrifugal blower for the fuel cell also includes an air cooling structure; the air cooling structure includes a branch pipe 18, one end of the branch pipe 18 is connected to the connecting pipe 17, and the other end of the branch pipe 18 is connected to the interior of the motor base 4; the motor base air outlet 41 is connected to the gap 44 at the left end inside the motor base 4.

[0044] The motor seat air hole 42 is connected to the right end annular groove 64, and a plurality of right spindle bearing seat air holes B 92 are arranged in an annular manner on the right spindle bearing seat 9. The right spindle bearing seat air hole B 92 is connected to the motor seat air hole 42. The motor seat air hole 42 is also arranged in an annular manner. The right spindle bearing seat air hole B 92 is connected to its corresponding motor seat air hole 42. A plurality of thrust bearing seat ventilation grooves 121 are arranged in an annular manner on the thrust bearing seat 12. The thrust bearing seat ventilation grooves 121 are connected to the right spindle bearing seat air hole B 92 is connected, and the thrust bearing seat ventilation groove 121 extends to the inner cavity of the thrust bearing seat 12. The thrust piece 13 and the thrust bearing seat 12 and the right main shaft bearing seat 9 are all connected with a first gap 200. The right main shaft bearing seat air hole B92 is provided with a right main shaft bearing seat air hole B branch hole 921, and the right main shaft bearing seat air hole B branch hole 921 is connected with the first gap 200; the right main shaft bearing is provided on the right main shaft bearing seat 9, and there is a second gap 300 between the right main shaft bearing and the main shaft, and the first gap 200 is connected with the second gap 300. A third gap 400 is provided between the stator 16 and the rotor shaft 51, and the second gap 300 is connected with the third gap 400. The third gap 400 is also connected with the gap 44 at the left end of the inside of the motor seat 4, and the gap 44 is connected with the motor seat outlet 41.

[0045] Combination Fig.13 as well as Fig.14 As shown in the figure, the motor seat 4 is also provided with a motor seat through hole, the right spindle bearing seat 9 is also provided with a right spindle bearing seat air hole A 91, the sealing plate 8 is also provided with a sealing plate air hole 83, and the thrust bearing seat 12 is also provided with a thrust bearing seat air hole 122, the sealing plate air hole 83 is connected with the thrust bearing seat air hole 122, the thrust bearing seat air hole 122 is connected with the corresponding right spindle bearing seat air hole A 91, and the right spindle bearing seat air hole A 91 is connected with the motor seat through hole 43. Thrust bearings (not shown in the figure) are provided on both sides of the thrust plate, and the two thrust bearings are respectively installed on the thrust bearing seat and the right spindle bearing seat. The installation method of the thrust bearing is common knowledge for those skilled in the art and will not be repeated here. The above structure reduces the pressure difference between the back of the right impeller 2 and the air inlet of the right compressor casing 10, reduces the tendency of the right impeller 2 to move along the right connecting shaft 52, avoids unbalanced force on the thrust bearing, and ensures the reliability of the thrust bearing.

[0046] The working process of the air suspension centrifugal blower for fuel cells of the present invention is described in detail as follows:

[0047] After the equipment is started, the rotor shaft 51 drives the left connecting shaft 53 and the right connecting shaft 52 to rotate, and the left impeller 3 and the right impeller 2 rotate; the external gas enters from the air inlet of the right compressor casing 10, is compressed by the right impeller 2, and the compressed gas enters the connecting pipe 17 connected to the air outlet of the right compressor casing 10, and a small amount of gas enters the interior of the motor base 4 through the branch pipe 18 on the connecting pipe 17 for air cooling. The gas in the connecting pipe 17 enters the interior of the left compressor casing 11 from the air inlet of the left compressor casing 11 for secondary compression, and is discharged into the air working duct through the air outlet of the left compressor casing 11.

[0048] A small amount of gas inside the right compressor casing 10 enters between the back of the right impeller 2 and the sealing plate 8. The back of the right impeller 2 and the sealing plate 8 are sealed using a sawtooth structure, which can balance the pressure on the back of the right impeller 2 while reducing the loss of flow. The sealing plate air hole 83 is connected to the thrust bearing seat air hole 122, the thrust bearing seat air hole 122 is connected to the corresponding right main shaft bearing seat air hole A 91, and the right main shaft bearing seat air hole A 91 is connected to the motor seat through hole 43. The above structure reduces the pressure difference between the back of the right impeller 2 and the air inlet of the right compressor casing 10, reduces the tendency of the right impeller 2 to move along the right connecting shaft 52, avoids the thrust bearing force imbalance, and ensures the reliability of the thrust bearing.

[0049] After being compressed by the right compressor, a small portion of the gas enters the internal space of the motor base 4 through the branch pipe 18, and enters the blind groove 61 of the cooling air sleeve 6, enters the left end annular groove 63 through the blind groove 61, and enters the right end annular groove 64 through multiple through grooves 62. In this process, the gas cools the cooling air sleeve 6. The gas flowing into the right end annular groove 64 reaches the cavity between the right main shaft bearing seat 9 and the inner wall of the motor seat 4 through the motor seat air hole 42. The right end of the right main shaft bearing seat air hole B 92 is blocked by the thrust bearing seat 12. The cooling gas flows into the first gap 200 through the branch hole 921 of the right main shaft bearing seat air hole B, and then flows into the thrust bearing seat ventilation groove 121 of the thrust bearing seat 12. The thrust bearing seat ventilation groove 121 is connected with the inner cavity of the thrust bearing seat, flows to the inner cavity of the thrust bearing to provide pressurized air and dissipate heat for it, and enters the cavity inside the motor seat 4 from the right main shaft bearing air hole B 92 and the matching clearance between the radial bearing (clockwise) and the rotor shaft 51, and after cooling the stator 16 and the radial bearing (clockwise), flows to the gap 44 at the left end of the motor seat 4, and is finally discharged from the motor seat outlet 41 without the need to set up a heat dissipation impeller. This reduces the power consumption of the heat dissipation impeller, improves the heat dissipation effect, and further reduces the temperature rise of the rotor and stator 16 of the motor, thereby increasing their service life.

[0050] At the same time, the coolant enters the water jacket 7 from the water inlet on the motor base 4 and circulates around the cooling water jacket 7 and is discharged from the water outlet of the motor base 4 to cool the stator 16 .

[0051] The bearings used in the present invention are all air suspension bearings.

[0052] The technical features named with serial numbers (such as the first gap, the second gap, the third gap, etc.) involved in this specification are only for distinguishing the various technical features and do not represent the positional relationship, installation sequence, working sequence, etc. between the various technical features.

[0053] In the description of this specification, it needs to be understood that the orientations or positional relationships described in terms of “right impeller”, “right impeller serrations”, “left impeller”, “right connecting shaft”, “left connecting shaft”, “left end ring groove”, “right end ring groove”, “inner serrations”, “side serrations”, “right main shaft bearing seat”, “right main shaft bearing seat air hole”, “right compressor casing”, “left compressor casing”, “left main shaft bearing seat”, “right connecting plate”, “left connecting plate”, “interior”, etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0054] The present invention is not limited to the above-mentioned specific implementation modes. Various changes made by ordinary technicians in this field based on the above-mentioned concepts without creative work are all within the protection scope of the present invention.

Claims

1. An air suspension centrifugal blower for a fuel cell, comprising a motor and a compressor; the motor comprises a motor seat with two ends open, a motor main shaft is arranged in the motor seat, and a stator surrounding the motor main shaft is also arranged in the motor seat; characterized in that: There are two compressors, both of which include compressor casings; the two compressor casings are respectively arranged at two ends of the motor base; impellers are respectively arranged at two ends of the motor main shaft, and the two impellers are respectively located in the two compressor casings; the two compressor casings are connected through a connecting pipe; The motor main shaft comprises a rotor shaft, and a thrust piece is arranged at the right end of the rotor shaft; The motor main shaft is rotatably mounted on the right main shaft bearing seat; a thrust bearing seat is also arranged in the motor seat; A cooling air sleeve is arranged in the motor base, and a blind groove and a through groove are axially arranged on the outer circumferential surface of the cooling air sleeve, and annular grooves are radially arranged at both ends of the cooling air sleeve, and the two annular grooves are respectively a left end annular groove and a right end annular groove; a motor base air outlet is also arranged on the motor base, and the motor base air outlet is connected with the gap at the left end inside the motor base; a motor base air hole is arranged on the motor base, and the motor base air hole is connected with the right end annular groove, a right spindle bearing base air hole B is arranged on the right spindle bearing base, and the right spindle bearing base air hole is connected with the motor base air hole, a thrust bearing base ventilation groove is arranged on the thrust bearing base, and the thrust bearing base The thrust bearing seat ventilation groove is connected with the right spindle bearing seat air hole B, and the thrust bearing seat ventilation groove extends to the inner cavity of the thrust bearing seat, the thrust plate and the thrust bearing and the right spindle bearing seat all have a first gap that is connected, the right spindle bearing seat air hole B is provided with a right spindle bearing seat air hole B branch hole, and the right spindle bearing seat air hole B branch hole is connected with the first gap; the right spindle bearing is provided with a right spindle bearing on the right spindle bearing seat, and a second gap is provided between the right spindle bearing and the spindle, the first gap is connected with the second gap, and the second gap is connected with the gap at the left end of the motor seat.

2. The air suspension centrifugal blower for a fuel cell according to claim 1, characterized in that: Two connecting shafts are fixedly connected to both ends of the rotor shaft, respectively. The two connecting shafts are a left connecting shaft and a right connecting shaft, respectively. The left connecting shaft is connected to the left end of the rotor shaft, and the right connecting shaft is fixedly connected to the right end of the rotor shaft; the two impellers are a left impeller and a right impeller, respectively. The left impeller is fixedly connected to the left connecting shaft, and the right impeller is fixedly connected to the right connecting shaft.

3. The air suspension centrifugal blower for a fuel cell according to claim 2, characterized in that: The two ends of the motor base are respectively fixedly connected with a left connecting plate and a right connecting plate; the two compressor casings are respectively a left compressor casing and a right compressor casing, the left compressor casing is fixedly connected to the left connecting plate, and the right compressor casing is fixedly connected to the right connecting plate.

4. The air suspension centrifugal blower for a fuel cell according to claim 3, characterized in that: The motor main shaft is rotatably mounted on the left main shaft bearing seat; the right main shaft bearing seat and the thrust bearing seat are fixedly connected to the right connecting plate.

5. The air suspension centrifugal blower for a fuel cell according to claim 4, characterized in that: A sealing plate is fixedly connected to the thrust bearing seat, and the sealing plate is arranged between the right impeller and the thrust bearing seat; the sealing plate is provided with inner sawtooth and side sawtooth; the right impeller is provided with right impeller sawtooth matched with the side sawtooth.

6. The air suspension centrifugal blower for a fuel cell according to claim 5, characterized in that: The air suspension centrifugal blower for fuel cells also includes an air cooling structure; the air cooling structure includes a branch pipe, one end of the branch pipe is connected to the connecting pipe, and the other end of the branch pipe is connected to the inside of the motor base.

7. The air suspension centrifugal blower for a fuel cell according to claim 5, characterized in that: The motor seat is also provided with a motor seat through hole, the right spindle bearing seat is also provided with a right spindle bearing seat air hole A, the sealing plate is also provided with a sealing plate air hole, and the thrust bearing seat is also provided with a thrust bearing seat air hole. The sealing plate air hole is connected with the motor seat through hole through the thrust bearing seat air hole and the right spindle bearing seat air hole A.

8. The air suspension centrifugal blower for a fuel cell according to claim 1, characterized in that: A cooling water jacket is also provided inside the motor base, and the cooling water jacket is provided between the stator and the cooling air jacket. The stator is attached to the inner wall of the cooling water jacket, and the cooling air jacket is attached to the outer wall of the cooling water jacket. A cooling water channel is provided on the outer wall of the cooling water jacket, and a water inlet and a water outlet connected to the cooling water channel are provided on the motor base.

9. The air suspension centrifugal blower for a fuel cell according to claim 3, characterized in that: A flow meter is provided at the air inlet of the right compressor casing.

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