Fuel cell air compressor
A fuel cell and fuel cell system technology, which is applied to fuel cells, liquid fuel engines, circuits, etc., can solve the problems that the rotor dynamic characteristics are difficult to meet the requirements, and the design cost of the fuel cell air compressor is high and the manufacturing cost is high.
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Embodiment 1
[0037] Figure 1 to Figure 4 Shown:
[0038] A fuel cell air compressor, comprising a motor 1, an air compressor body 2, a turbo expander 3 and a fuel cell system 5;
[0039] The air compressor body 2 includes a compressor volute 21, a rotating shaft 22 and an impeller 23, the rotating shaft 22 is rotatably arranged in the compressor volute 21, and the impeller 23 is arranged on the rotating shaft 22;
[0040] The turbo expander 3 includes a turbine 31 and an expander volute 32, the expander volute 32 is arranged at the end of the compressor volute 21 away from the motor 1, and the turbine 31 is arranged at the end of the expander Inside the volute 32, the turbine 31 is connected to the rotating shaft 22, and the air compressor body 2 communicates with the turbo expander 3 through the fuel cell system 5;
[0041] The motor 1 is in transmission connection with the rotating shaft 22 through a coupling 4 .
[0042] In a fuel cell air compressor with the above structure, the im...
Embodiment 2
[0054] Such as Figure 1 to Figure 5 Shown:
[0055] As a further optimization of the above embodiment, the above-mentioned air compressor body 2 includes a primary air compressor and a secondary air compressor; wherein,
[0056] The above-mentioned air intake channel 15 communicates with the inlet of the above-mentioned fuel cell system 5 through the first-stage air compressor and the second-stage air compressor in turn, that is, the air passages of the first-stage air compressor and the second-stage air compressor are connected in series. connected to increase the pressure ratio and flow rate of the air entering the fuel cell system 5 , thereby further increasing the power of the fuel cell system 5 .
[0057] It should be noted that the number of the above-mentioned first-stage air compressors and second-stage air compressors can be set to multiple, and multiple first-stage air compressors and second-stage air compressors are connected in series, so that the fuel cell syste...
Embodiment 3
[0059] Figure 1 to Figure 6 Shown:
[0060] A fuel cell air compressor, the front end cover 112 and the rear end cover 114 of the motor are provided with air foil bearings 16, the above-mentioned rotor is arranged in the casing 11 through the air foil bearings 16, the above-mentioned compressor Both the volute 21 and the expander volute 32 are provided with radial floating ring bearings 26 , and both ends of the rotating shaft 22 are rotatably arranged on the compressor volute 21 and the expander volute 32 through the radial floating ring bearings 26 .
[0061] Optimally, the rotating shaft 22 is also provided with a thrust floating ring bearing to better balance the axial force of the impeller 23 and the turbine 31, so as to make the operation of the fuel cell air compressor more stable; the above-mentioned radial floating ring bearing 26 and the installation mode of the thrust floating ring bearing are exactly the same as the structure of the turbo expander on the automobi...
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