Linear motor accelerated impact spring fatigue test device

Abstract

A linear motor accelerated impact spring fatigue test device involves high frequency, high speed, and high load impact of vibration spring fatigue life test device. The invention includes cylindrical linear induction motor, electric control parts and fuselage. Since the invention mainly has simple structure, high efficiency, and can simulate the actual work environment to inflict spring sample high-speed, high-frequency, high-thrust and wide-vibration impact vibration, high precision detection, simple operation, and other features, so the invention can be widely applied in detection in the course of high-speed, high-frequency, high-thrust, wide trip vibration of the impact of the fatigue life of spring, especially the multi-helical spring fatigue. It provides the development of high-frequency reciprocating movement springs with a more accurate basis, and improves their quality, which could improve the performance of such equipment and competitiveness.

Description

technical field [0001] The invention belongs to a test device for mechanical parts, in particular to a fatigue life test device for a shock vibration spring subjected to high frequency, high speed and heavy load. Background technique [0002] As an elastic element, the spring plays a very important role in the host. The quality of spring performance has a direct impact on the performance and safety of machinery and equipment, especially the fatigue life and reliability of springs are of great significance to ensure the stable operation of machinery and equipment. All springs subjected to variable loads must undergo fatigue performance testing in the links of internal quality control, user inspection, new product identification, certification, industry sampling inspection and process adjustment. Springs that have not been screened and tested often cause major equipment accidents and casualties due to poor quality, size changes, or even breakage during use. Since the perform...

AI Technical Summary

Problems solved by technology

The main disadvantages are: the amplitude is very small (usually a few millimeters), the load is small (the maximum dynamic load is ±22.5 tons), and the vibration waveform generated is a regular sine wave, not the shock wave actually borne by the spring

However, this device converts the electrical signal into the flow of oil through the servo valve and alternately enters the oil cylinder, thereby pushing the piston at high speed to vibrate the sample, and its vibration frequency and amplitude range cannot reach a large value at the same time

In addition, although the signal generator in the electrical control device can generate arbitrary waves, the impact force and speed generated cannot meet actual needs.

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