Electro-hydraulic compound servo loading method and device

Abstract

The invention provides an electro-hydraulic compound servo loading method and device, and belongs to the technical field of a servo loading method and device. In an electro-hydraulic compound servo loading system, a servo motor drives a leading screw, a control hydraulic cylinder is promoted, the control hydraulic cylinder drives a loading hydraulic cylinder to output loading pressure; a pressuresensor is mounted at the front end of the hydraulic cylinder; the system is equipped with a servo controller to realize automatic loading according to a load spectrum; an infliction adopts a servo toload, during the loading process, a stable loading is ensured, and the applied load can be measured in real time and fed back to a control system; the system monitors the piston position of the cylinder through a travel switch installed on a hydraulic cylinder body to determine whether the system exists leakage and oil shortage; and when the leakage and the oil shortage exist, an automatic oil filling device can automatically fill oil to the hydraulic drive circuit. According to the electro-hydraulic compound servo loading method and device, a motor drives a screw loading rod, through oil pressure feedback control and front-end force sensor feedback, high precision and rapid response of the load can be applied, and the oil leakage which leads to a dead zone can be prevented.

Description

technical field [0001] The invention relates to an electro-hydraulic composite servo loading method and device, and belongs to the technical field of servo loading methods and devices. Background technique [0002] In the test of mechanical parts, it is generally necessary to apply a test load to the specimen. The load condition simulation is an important part in the condition simulation test. For tests that take a long time or require loads to be applied according to a certain spectral line during the test, it is required that the test load can be automatically tested according to the preset spectral lines, which puts forward requirements for the automation of load application and online monitoring functions. And put forward higher requirements on the loading accuracy and response speed of the loading system. For large-scale test load application, accurate load application is the premise to ensure that the test conditions of the test process are controllable and the test ...

AI Technical Summary

Problems solved by technology

Hydraulic servo automatic loading has the advantages of easy to obtain a high linear pressure range, stable loading pressure, and easy control, but the hydraulic equipment and pipelines are too complicated, and the hydraulic control valve has extremely high requirements for the cleanliness of the hydraulic oil, making maintenance difficult

High cost and many leakage points in the hydraulic system

The electric cylinder servo loading system uses a motor to drive a screw loading rod to achieve loading. This method is easy to implement closed-loop servo control and can achieve high-precision and fast-response load application, but the loading capacity is low

Images