A centrifugal hydrogen circulation pump

Abstract

A centrifugal hydrogen circulation pump, including a volute, an impeller, an adapter seat, a pump casing, and a motor stator and a motor rotor; Driven by the rotating shaft, the impeller is accelerated and pressurized and then discharged from the tangential exhaust pipe; the impeller and the rotating shaft are floatingly suspended on the adapter seat through the ceramic bearing and the bearing steel sleeve, and the bearing steel sleeve is connected to the rotating shaft. There is an O-ring sealing ring between the sockets, which not only effectively realizes sealing, but also avoids vibration caused by rotor imbalance and high and low frequency excitation caused by unsteady flow of air in the rotor components. It can meet the flow requirements of 60kW or above high-power fuel cell system. Aiming at the characteristics of a wide range of humidity and temperature changes in the working fluid in a complex multi-phase medium environment, it can effectively prevent the flow field from obstructing the air flow, increase the output current density of the battery, and maintain the stability of the output voltage of the hydrogen fuel cell.

Description

technical field [0001] The invention relates to the technical field of fuel cell power systems, in particular to a centrifugal hydrogen circulation pump. Background technique [0002] As a truly "zero-emission" clean energy, the application of hydrogen fuel cells in automobiles is developing rapidly. Hydrogen fuel cells use electrochemical reactions instead of combustion (gasoline, diesel) or energy storage (battery). Combustion releases pollutants like COx, NOx, SOx gases and dust. A hydrogen fuel cell, on the other hand, only produces water and heat. If the hydrogen is produced by renewable energy sources (photovoltaic panels, wind power, etc.), the entire cycle is a complete process that does not generate harmful emissions. The hydrogen fuel cell runs quietly, with a noise of only about 55dB. This makes hydrogen fuel cells suitable for indoor installations, or outdoors where noise is restricted. That is, hydrogen fuel cells have the advantages of no pollution, no noi...

AI Technical Summary

Problems solved by technology

[0006] The German company Busch is famous for its production of claw compressors and vacuum pumps. On this basis, it has developed a claw-type low-flow hydrogen circulation pump, which is driven by a high-speed DC brushless motor. The surface of the rotor and the shell of the compressor are coated with Layer protection, which has been applied to a variety of hydrogen fuel cell vehicles, has the advantages of high reliability and compact structure, but it needs to design a better tooth shape of the claw pump to balance the compression ratio and performance; its disadvantage is due to its oil-free The principle of gap sealing is adopted under the conditions, so the sealing performance is poor; in addition, the noise and vibration of the claw booster pump are also problems that need to be solved

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