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Centrifugal type fuel cell air compressor with energy recovery function

A technology of air compressors and fuel cells, which is applied in the direction of fuel cells, liquid fuel engines, electrical components, etc., to achieve the effects of improving efficiency, compact system, and improving reliability

Active Publication Date: 2018-04-10
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a centrifugal fuel cell air compressor with energy recovery function that improves the overall efficiency of the fuel cell system and overcomes the inherent surge defect of the centrifugal air compressor in view of the defects of the existing fuel cell air compressor. machine

Method used

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  • Centrifugal type fuel cell air compressor with energy recovery function
  • Centrifugal type fuel cell air compressor with energy recovery function
  • Centrifugal type fuel cell air compressor with energy recovery function

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Embodiment Construction

[0026] Such as figure 1 , 2 A centrifugal fuel cell air compressor with energy recovery function is shown, including a motor casing 9 , a rotor assembly, a compressor casing 11 , an expansion casing 14 and an air intake cover 1 . Motor part is made up of motor housing 9, stator 8, motor cover 2, and motor cover 2 is fixed on the motor housing 9 by motor cover bolt 4.

[0027] The intake cover 1 is connected to the motor casing 9 through the intake cover bolts 5, the motor casing 9 is connected to the compressor casing 11 through the motor casing bolts 10, and the expander casing 14 is fixed to the compressor casing through the expander casing bolts 13. on shell 11.

[0028] As shown in Figures 2 and 3, the rotor assembly locks the bearing 3, motor rotor 7, composite impeller 12, and bearing 15 on the rotating shaft 6 through the lock nut 16 to form the rotor assembly. The bearings at both ends of the rotating shaft 6 adopt high-speed rolling bearings, which do not require l...

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Abstract

The invention discloses a centrifugal type fuel cell air compressor with an energy recovery function. The centrifugal type fuel cell air compressor comprises a motor, an air compressor casing, an expander casing and an air inlet cover; an air compressor impeller and an expander impeller are mounted at one end of a motor shaft, and the air compressor impeller and the expander impeller are correspondingly surrounded by the air compressor casing and the expander casing to form a compressed air runner and an expander runner; and a by-pass valve is arranged between the compressed air runner and theexpander runner. According to the centrifugal type fuel cell air compressor with the energy recovery function, a centrifugal type air compressor and a turbo expander are adopted and matched to recover exhaust energy of an electric pile, and the efficiency of a system is improved; by adopting the scheme of back-to-back integrated design of the air compressor and the expander, the whole system is compact, the power weight ratio is large, and the efficiency is high; and through control of the by-pass valve, the situation of surge under the condition that air flow of the supplying electric pile is small is avoided, and meanwhile, bypass air energy can also be recovered through the expander.

Description

technical field [0001] The invention belongs to the technical field of fuel cell engines, in particular to a centrifugal fuel cell air compressor with energy recovery function. Background technique [0002] For fuel cell engines, supercharging the consumed air is necessary. On the one hand, it can increase the power density of the fuel cell, on the other hand, the oxygen partial pressure affects the Gibbs free energy in the chemical reaction, thereby affecting the efficiency limit of the fuel cell. At present, the air boosting system for fuel cell engines generally adopts twin-screw, Roots-type or centrifugal air compressors as the core compression pump. [0003] Air compressors for fuel cells are mainly divided into two categories, one is positive displacement air compressors, and twin-screw and Roots air compressors are commonly used. It is characterized by simple structure and convenient control, but its disadvantages are also obvious, such as large volume and weight, a...

Claims

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Application Information

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IPC IPC(8): F04D17/10F04D25/06F04D29/00F04D29/66H01M8/06
CPCF04D17/10F04D25/0606F04D29/002F04D29/668H01M8/06Y02E60/50
Inventor 王凯钱星倪永成居钰生夏少华易正根徐秀华陈雷雷许洪瑜
Owner CHINA FIRST AUTOMOBILE
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