Method for testing leakage rate of air seal of fuel cell air compressor

A test method and fuel cell technology, applied in pump testing, mechanical equipment, machines/engines, etc., can solve the problem that it is difficult to effectively and accurately measure the air outlet flow of the air compressor, and the aerodynamic characteristics of the air compressor system cannot be obtained. It is impossible to effectively measure the leakage of the air compressor system sealing structure, so as to achieve the effect of easy promotion and utilization, accurate and efficient detection methods, and small errors

Pending Publication Date: 2021-07-23
华涧新能源科技(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, because the air compressor outlet temperature is as high as 150-200°C, the current high-precision mass flowmeters in the industry cannot operate at this temperature for a long time, so it is difficult to effectively and accurately measure the actual air outlet flow of the air compressor, so it is impossible to obtain Therefore, it is impossible to effectively measure the leakage of the overall sealing structure of the air compressor system

Method used

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  • Method for testing leakage rate of air seal of fuel cell air compressor
  • Method for testing leakage rate of air seal of fuel cell air compressor
  • Method for testing leakage rate of air seal of fuel cell air compressor

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Experimental program
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Effect test

Embodiment 1

[0040] Such as figure 1 As shown, the test system and structure based on the test method of the present invention include: an air compressor module 1 , a main air intake mechanism 2 , a main air outlet mechanism 3 , and a cooling air mechanism 4 .

[0041] The air compressor module 1 includes: an air compressor body 101, an air compressor stage 1 pressurization and sealing structure 102, an air compressor stage 2 pressurization and sealing structure 103, a first flow meter 104, a first pressure sensor 105, The first temperature sensor 106, and the above-mentioned structures are connected in series by an intermediate pipe 107.

[0042] Wherein the main air intake mechanism 2 includes: an air filter 201, a second flow meter 202, a second pressure sensor 203, and a second temperature sensor 204, and an air intake pipeline 205 is used to connect each component in series.

[0043] The main air outlet mechanism 3 includes: a third pressure sensor 301, a third temperature sensor 302...

Embodiment 2

[0071] (1) From the idle speed of 30000rpm to the peak speed of the motor of 90000rpm, the speed vector N is equally spaced: 30000, 5000, 7000, 90000rpm;

[0072] From 0 to the highest flow rate of 120g / s, it is equally spaced into the flow vector Qin of the main gas path inlet: 0, 10, 20, ..., 120g / s;

[0073]Take the Qin vector as the abscissa and the N vector as the ordinate to establish a test condition matrix, as shown in the following table:

[0074]

[0075] (2) The air compressor uses Id=0, speed loop control, adjusts the opening of the air outlet valve, adjusts the inlet flow of the main air circuit to the specified value, and tests the above working conditions respectively. The air cooling system can automatically read the outlet pressure of the air compressor Pout, and calculate the air-cooling outlet pressure target value P*airin in real time according to the following formula, as the closed-loop control value of the air-cooling outlet pressure, and set the air-...

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Abstract

The invention relates to a method for testing the leakage rate of an air seal of a fuel cell air compressor. The method comprises the steps that the rotating speed of the air compressor is divided from the idle rotating speed to the peak rotating speed into a speed vector N of 4-10 elements at equal intervals, and the flow of the air compressor is divided into a flow vector Q of 10-20 elements at equal intervals; the air compressor operates at a specified rotating speed V1, so that the inlet flow of the air compressor is Q1, and the equivalent flow of the air compressor in a reactor, the air outlet pressure of the air compressor, the leakage rates of the first-stage and second-stage supercharging ends and the total comprehensive leakage rate are measured; the measurement steps are repeated, electronic valves of a main air outlet mechanism are adjusted in sequence, so that the inlet flow of the air compressor is correspondingly Q2, Q3... QMAX, and data vectors are obtained; the measurement steps are repeated, and the rotating speed of the motor is sequentially adjusted to be V2, V3... VMAX to obtain a data matrix; and the data is processed to obtain a first-stage and second-stage air seal leakage rate and a comprehensive air seal leakage rate MAP graph related to the equivalent in-pile flow and the air outlet pressure of the air compressor.

Description

technical field [0001] The invention relates to the technical field of fuel cell air compressor testing, in particular to a method for testing the air seal leakage of a fuel cell air compressor. Background technique [0002] With the gradual scarcity of energy and the improvement of people's awareness of environmental protection, new energy vehicle technology is getting more and more attention. Hydrogen fuel cell electric vehicles are considered to be It is one of the important directions for the development of new energy vehicles, and the fuel cell system is the core part of it. [0003] The special air compressor for hydrogen fuel cell is the core component of the fuel cell system, and the air compressor is an important part of the air supply subsystem. Provide the required air mass flow rate according to the actual working conditions. Appropriate air supply flow and pressure can greatly increase the power density and efficiency of the fuel cell, greatly reduce the size ...

Claims

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Application Information

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IPC IPC(8): F04B51/00
CPCF04B51/00Y02E60/50
Inventor 袁羲鑫周磊肖勇张涛王乾振
Owner 华涧新能源科技(上海)有限公司
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