Hydraulic system

Abstract

The invention provides a hydraulic system. The hydraulic system comprises a hydraulic pump, a valve group and a connecting pipe. The valve group is connected with the hydraulic pump through a conveying pipeline. The valve group comprises multiple cartridge valves and multiple electromagnetic valves for controlling the multiple cartridge valves to be switched on or off. One end of the connecting pipeline is connected with the valve group, and the other end of the connecting pipeline is connected with the hydraulic cylinder, wherein the hydraulic cylinder is controlled by controlling the cartridge valves to be switched on or off. The hydraulic system is composed of the multiple cartridge valves and the multiple electromagnetic valves, as the conical surface sealing manners of the cartridge valves have good sealing performance, the error of the experimental result is caused due to the sealing performance problem of a hydraulic valve during a pressure maintaining experiment can be avoided,in combination with the electromagnetic valves, electrical control is achieved, and the operating intensity is greatly simplified.

Description

Technical field [0001] The present invention relates to the field of hydraulic technology, in particular to a hydraulic system. Background technique [0002] The role of hydraulic cylinders in the hydraulic system is self-evident. The standard to measure the quality of a hydraulic cylinder is to test its performance. At present, the performance test of hydraulic cylinders mainly includes hydraulic cylinder trial operation experiment, start-up pressure experiment, pressure resistance experiment, and pressure holding experiment , Leakage test, etc., the pressure holding performance of the hydraulic cylinder is one of the key parameters of the hydraulic cylinder. The better the pressure holding performance, the better the reliability. At present, the high-performance hydraulic cylinder market in the world is monopolized by Germany, Japan, and the United States. The reason is that foreign companies that produce hydraulic cylinders have the world's most advanced hydraulic cylinder per...

AI Technical Summary

Problems solved by technology

[0004] 1. Usually, the three-position four-way electromagnetic reversing valve is used to realize the oil cylinder pressure maintenance. However, because the electromagnetic reversing valve is a slide valve structure, the leakage in the middle position is large, and it is often not true during the cylinder pressure maintaining experiment. Reflecting the pressure-holding performance of the hydraulic cylinder, resulting in large deviations in the experimental results, the hydraulic cylinder has potential safety hazards and may also cause unnecessary cost losses

[0005] 2. Some experimental benches use expensive and complicated electrical equipment to carry out related experiments on hydraulic cylinder pressure maintenance, resulting in complex control procedures, high costs, and poor usability. Only professionals familiar with this part of the control procedures can use it. Relevant experiments can be carried out. Although the quality of the tested hydraulic cylinder is reliable, the test cost is high and the efficiency is low.

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