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Centrifugal compressor of hydrogen circulating pump

A circulating pump, centrifugal technology, applied in the components, pump, pump control and other directions of the pumping device for elastic fluid, can solve the problem of hydrogen circulating pump freezing and so on

Active Publication Date: 2021-06-22
BEIJING BOLKEN EQUIP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a centrifugal compressor for a hydrogen circulation pump, which has a compact overall structure, light weight, high reliability, and low noise, and can meet the working condition requirements of high pressure ratio and large flow on the basis of realizing non-contact pressurization, and Solve the stall problem caused by freezing of the hydrogen circulation pump, reduce the difficulty of controlling the hydrogen circulation pump, and improve the service life of the hydrogen circulation pump

Method used

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  • Centrifugal compressor of hydrogen circulating pump
  • Centrifugal compressor of hydrogen circulating pump
  • Centrifugal compressor of hydrogen circulating pump

Examples

Experimental program
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Effect test

Embodiment 1

[0028] A centrifugal compressor for a hydrogen circulation pump, such as figure 1 As shown, it includes a fixedly connected volute 1 and an adapter seat 3, and also includes an impeller 2 arranged inside the volute 1 and the adapter seat 3; the volute 1 includes an axial The air inlet 12 and the tangential exhaust pipe 13 arranged in its circumferential direction are sealed with a sealing ring 9 (such as an O-ring) between the volute 1 and the adapter seat 3 to prevent hydrogen leakage. The impeller 2 is as Figure 2-3 As shown, it includes a blade 21, a blade carrying disk 22 and a sealing disk 23, and the blade 21 is evenly arranged on the end of the blade carrying disk 22 facing the axial air inlet 12 around the rotation axis of the impeller 2, so The sealing disc 23 is coaxially arranged on the other end of the blade bearing disc 22; the blade 21, the blade bearing disc 22 and the sealing disc 23 are generally integrated, and the circumferential surface of the sealing dis...

Embodiment 2

[0036] Different from the above-mentioned embodiments, such as Figure 6 As shown, the impeller shaft hole can be designed as a stepped hole, the first light hole with a short radius is set on the side where the blade carrying plate 22 is located, and the positioning light hole with a long radius is set on the side where the sealing plate 23 is located.

[0037] The free end of the rotating shaft 7 ( Figure 6 The left end of the left end) is provided with a threaded part 71 and a positioning disc 73; the threaded part 71 is screwed out of the shaft hole 24, and after the blade 21 side is screwed and fastened with the fastening nut 8, the positioning disc 73 is just on the The positioning light hole is positioned at the step. At this time, the fastening nut 8 can be a double nut structure, and the fastening nut 8 of the double nut structure is screwed on the threaded part 71 to compress the impeller 2 and the positioning plate 73, so as to prevent the impeller 2 from rotating...

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Abstract

A centrifugal compressor of a hydrogen circulating pump comprises a volute, an impeller and an adapter, wherein the impeller comprises blades, a blade bearing disc and a sealing disc, and the blades are evenly arranged at the end, facing an axial air inlet, of the blade bearing disc around the rotating axis of the impeller; and the sealing disc is coaxially arranged at the other end of the blade bearing disc; and sealing teeth are arranged on the circumferential surface of the sealing disc, and the sealing teeth are in clearance fit with the adapter to form serrated sealing. The centrifugal compressor is compact in overall structure, light in weight, high in reliability, low in noise, and the working condition requirements of high pressure ratio and large flow can be met. On the basis that the defects of hydrogen circulating pumps in other forms are overcome, non-contact pressurization is achieved, and a deicing heating device is designed while the pressurization pneumatic efficiency is considered; the locked-rotor problem due to icing of the hydrogen circulating pump is solved, and the control difficulty of the hydrogen circulating pump is reduced; and the service life of the hydrogen circulating pump is prolonged.

Description

[0001] The invention relates to the technical field of fuel cell power systems, in particular to a centrifugal compressor for a hydrogen circulation pump. Background technique [0002] Hydrogen and air (oxygen in air) supply systems are two key gas supply systems for hydrogen fuel cells. The hydrogen in the on-board high-pressure hydrogen storage bottle supplies hydrogen to the fuel cell through a pressure reducer and a flow control valve. In fact, the actual supply flow rate of hydrogen is 1.1 to 1.5 times higher than the theoretical value consumption, so for better hydrogen management, a hydrogen recirculation system is generally used to recycle unreacted hydrogen from the anode exhaust gas to the hydrogen in the fuel cell stack. port to realize the recycling of hydrogen. [0003] Current methods of hydrogen recirculation include injectors and hydrogen recirculation booster pumps. The ejector uses the pressure difference generated by the high-speed injection of the working ...

Claims

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Application Information

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IPC IPC(8): F04D27/00F04D29/053F04D29/056F04D29/08F04D29/28F04D29/30F04D29/42F04D29/58
CPCF04D29/4206F04D29/284F04D29/30F04D29/582F04D29/053F04D29/056F04D29/083F04D27/00
Inventor 祁明旭张璇徐子介
Owner BEIJING BOLKEN EQUIP
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