Test bench of comprehensive performance of air spring

Abstract

The invention discloses a test bench of the comprehensive performance of an air spring, and belongs to the technical field of vehicle engineering. The test bench can effectively achieve the aims of carrying out the vertical, transverse and twisting tests of the air spring at the same time and simulating the actual working states of the air spring. A rack of the test bench is in a four stand column type, a bearing platform is arranged in the middle of the rack, a device for bearing balance weight is arranged above the rack, a sensor is arranged below the rack, each stand column of the rack is provided with a cone-shaped fixing nut, a vertical hydraulic actuator which is arranged in a plane triangle mode is arranged below a workbench, and the volume of an additional air chamber is adjustable. The influence to the dynamics performance of the air spring by regional environment with different temperatures can be simulated by an external air conditioner system, multi-dimensional simulation is applied to the air spring through a shock excitation source, changes of loads and deflection of the air spring under the conditions with different environment temperatures and physical parameters are measured, and parameters such as dynamic stiffness, static stiffness, damping ratio and transfer ratio of the air spring are calculated through parameters of vibration characteristics. The test bench is mainly used for testing the comprehensive performance of the air spring.

Description

technical field [0001] The invention belongs to the technical field of vehicle engineering, in particular to a dynamic and static characteristic testing device of an air spring for a vehicle. Background technique [0002] With the increase of vehicle speed and increasingly stringent requirements for comfort, air springs have been widely used because of their good stiffness nonlinearity and shock absorption performance. Its good dynamic performance makes it play a vital role in improving the vehicle's running speed and ride comfort. The stiffness and damping characteristics of the air spring are affected by many physical parameters, temperature and actual working conditions. Due to the material nonlinearity, geometric nonlinearity and contact nonlinearity of the air spring, the dynamic analysis of the air spring becomes more difficult. Therefore, there is an urgent need for a test method and test equipment that can comprehensively consider the influence of the ambient temper...

AI Technical Summary

Problems solved by technology

The stiffness and damping characteristics of the air spring are affected by many physical parameters, temperature and actual working conditions. Due to the material nonlinearity, geometric nonlinearity and contact nonlinearity of the air spring, the dynamic analysis of the air spring becomes more difficult. Therefore, there is an urgent need for a test method and test equipment that can comprehensively consider the influence of the ambient temperature, the volume of the air spring body, the volume of the additional air chamber, the diameter of the orifice, and the length of the connecting pipeline on the dynamic characteristics of the air spring. Perform a complete dynamic study of an air spring

[0003] The Sifang Vehicle Research Institute has two types of test benches, the vertical vibration test bench and the transverse vibration test bench, which are respectively equipped with a vertical excitation loading device and a lateral excitation loading device. The vertical load is 20t, and the accuracy of the equipment does not meet the test requirements under high-frequency loading, and the horizontal test bench is separated from the vertical test bench, so it is impossible to conduct vertical, lateral and torsional tests on the air spring at the same time, so the actual work of the air spring cannot be simulated well state

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