Gas compression device, method for manufacturing gas compression device
A technology of gas compression and manufacturing method, which is applied to the components of pumping devices for elastic fluids, pump devices, engine manufacturing, etc., and can solve problems such as the reduction of compression efficiency
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no. 1 Embodiment approach
[0025] figure 1 It is a schematic sectional view of the gas compression device 200 in one form of this disclosure. The gas compression device 200 is a so-called centrifugal electric compressor. In the present embodiment, the gas compression device 200 is provided in the gas supply channel 110 that supplies gas to the fuel cell stack 120 , and compresses the gas to supply the gas to the fuel cell stack 120 . In this embodiment, air is used as the gas, but oxygen and other gases may also be used.
[0026] The gas compression device 200 includes a first impeller 10 and a rotating shaft 20 . The gas compression device 200 further includes bearings 40, 42 and bearing housings 41, 43, spacers 51, 52, 53, 54, a mechanical seal 70 having a rotating ring 71 and a fixed ring 72, nuts 81, 82, and a housing 90 . The casing 90 is a casing having a motor housing portion 91 for housing the motor 30 and a first impeller housing portion 95 for housing the first impeller 10 . exist figure...
no. 2 Embodiment approach
[0044] Hereinafter, the same reference numerals are assigned to the same configurations and the same steps as those of the first embodiment, and their detailed descriptions are omitted. The configuration of the gas compression device 200 in the second embodiment is the same as that of the first embodiment, and the manufacturing method is different from that of the first embodiment. image 3 It is a process drawing which shows the manufacturing method of the gas compression apparatus 200 in 2nd Embodiment. image 3 manufacturing method in figure 2 Added step S25 between step S20 and step S30, and replaced it with step S45 figure 2 Step S40.
[0045] In the second embodiment, when the plurality of rotating members 100 are attached to the rotating shaft 20 and the nuts 82 are fastened to the rotating shaft 20 (step S20), the step of attaching the first impeller 10 to the rotating shaft 20 (step S30) Before that, the balance adjustment of the plurality of rotating members 100...
no. 3 Embodiment approach
[0050] Figure 4 It is a schematic sectional view of the gas compression device 200a in 3rd Embodiment. The gas compressing device 200a in the third embodiment is basically the same as the gas compressing device 200 in the first embodiment in that it includes the second impeller 12 and that the housing 90a includes the second impeller accommodating portion 92 that accommodates the second impeller 12. different.
[0051] The second impeller 12 is fixed to the second end e2 of the rotating shaft 20 . The second impeller 12 is rotated by the exhaust gas from the fuel cell stack 120 flowing through the gas discharge channel 140 . The second impeller 12 is also called a turbine impeller.
[0052] The second end portion e2 of the rotating shaft 20 protrudes toward the second impeller housing portion 92 through the through-hole 94 formed in the motor housing portion 91a. On the second surface 24 side of the rotating shaft 20, a rotating ring 71, a spacer 51, a bearing 40, a space...
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