A time-domain test and analysis method for dynamic parameters of automotive fluid pumps

Abstract

The invention discloses a method for testing and analyzing dynamic parameters of an automobile fluid pump in the time domain. The fluid pump includes a rotor, blades, a cylinder body, a clutch armature and a pulley connected to the long axis of the rotor. There is a compression chamber in the pump, which includes the following steps: S1: fluid Calibration of pump characteristic position information points, including calibration of internal characteristic position information points and external characteristic position information points; S2: Position signal acquisition, time-domain trigger conversion of photoelectric signals through photoelectric sensors, and transmission of dynamic parameter information of fluid pumps to high-speed data acquisition instruments Real-time recording, combined with the recording of external photoelectric time-domain signals and the synchronization of dynamic parameter time-domain signals, accurately quantifies and records the rotational performance of the fluid pump; S3: Time-domain analysis of dynamic parameters of characteristic position information points, specifically S31: Rotational performance analysis and S32: fast fault component positioning analysis, the present invention mainly solves the problem that the excitation response signal of the fluid pump rotating body does not correspond to the time domain of the structural rotation position signal during operation.

Description

technical field [0001] The invention relates to the technical field of automobile fluid pumps, in particular to a method for testing and analyzing dynamic parameters of automobile fluid pumps in time domain. Background technique [0002] Automotive fluid pump is a kind of fluid machinery suitable for automotive electrical appliances. It generally includes small rotary pump bodies such as automotive air-conditioning compressors, oil pumps, chilled water pumps, and air compressors. The main functions are fluid compression, fluid delivery, etc. Features. Automobile fluid pumps are installed in the high-temperature, strong-vibration road environment in the engine compartment of the automobile. They are often operated under multiple alternating loads, which may cause noise, vibration, and functional failure complaints of fluid pump components and the entire vehicle, and even cause follow-up components to be mechanically damaged. Damage, on this basis, product design verification...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a time-domain test and analysis method for the dynamic parameters of the automotive fluid pump, which uses a high-response fluid pump operating parameter sensor for real-time test and analysis, and mainly solves the problem of fluid pump rotating body operation. The excitation response signal does not correspond to the structural rotational position signal in the time domain, and a method for analyzing the rotational compression and delivery performance of fluid pumps based on time domain signals is proposed

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