Test method for testing service life of hydro-pneumatic spring

Abstract

The invention discloses a test method for testing the service life of a hydro-pneumatic spring. The test method is conducted by means of a hydro-pneumatic spring test stand. The test method comprises the steps of 1, testing the static characteristics of a hydro-pneumatic spring; 2, testing the dynamic characteristics of the hydro-pneumatic spring; 3, testing the service life of the hydro-pneumatic spring; 4, returning to the step 1 when the oil liquid cleanliness of the hydro-pneumatic spring is in the normal state; 5, circularly executing the above process from the step 1 to the step 4. When the hydro-pneumatic spring conducts 240 million times of shock excitation after completing 12 cycles of the step 3, the test is terminated. When the leakage state, the sealing state and the oil liquid cleanliness state are normal, the hydro-pneumatic spring passes the test assessment on the service life of a corresponding mileage, wherein the 240 million times of shock excitation during 12 cycles corresponds to the vehicle travel of 6 ten thousand kilometers. The test method has the advantages of convenient implementation, scientific and reasonable properties, high reliability, and high practicability.

Description

technical field [0001] The invention relates to a method for testing the performance of an oil-gas spring, in particular to a method for testing the life of the oil-gas spring. Background technique [0002] The oil-gas spring is a nonlinear elastic element that transmits pressure with oil and uses inert gas as the elastic medium. figure 1 As shown, the oil and gas spring is mainly composed of upper lugs, lower lugs, inner cylinders, outer cylinders, and one-way valves for oil and gas filling. Oil and gas springs are often used in vehicle chassis suspension systems. As elastic elements, they play a decisive role in the performance of the suspension system. Especially in the aerospace and military fields, due to the particularity of transport products, the suspension system is required to have high ride comfort and reliability, so as to avoid the failure of the vibration reduction function caused by a single point of failure. For example, the application of oil and gas sprin...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that there is no technical means for detecting or assessing the life of oil-gas bombs in the prior art, and it is impossible to ensure that the chassis suspension system of special vehicles requires oil-gas springs to meet a specific life limit, the invention provides a test method for the life of oil-gas springs. Described test method adopts oil-gas spring test bench to carry out, and oil-gas spring test bench is provided with oil-gas spring loading system and test data collection system, is characterized in that, comprises the following steps:

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