Measuring method for leakage of hydraulic system and its application

Abstract

The invention is a method for measuring internal leakage of a hydraulic system, comprising the steps of: (1) using original hydraulic energy storage device at hydraulic station or on main pressure pipeline in the hydraulic system, or connecting special measuring hydraulic energy storage device into the system; (2) firstly measuring actual pre-charged gas pressure P0 of the energy storage device and able to obtain effective gas volume V0 according to specification of the energy storage device or actually measure it; (3) then letting the hydraulic system reach normal working pressure, stopping the system from do work to outside, turning off the working pump at the hydraulic station, letting the energy storage device singly supply oil to the system, and recording starting time t1, and initial pressure P1 as well as some middle time t2 and corresponding pressure value P2; (4) by formula, calculating internal leakage of the hydraulic system. And the method is simple and convenient and has strong universality.

Description

technical field [0001] The invention relates to a method for measuring internal leakage of a hydraulic system and its application. Background technique [0002] Hydraulic equipment is widely used in the machinery industry, especially in heavy industry. For a long time, internal leakage has been an important problem in the hydraulic system. It is like a black box for equipment maintenance personnel, which contains a lot of important information in the hydraulic system, but it is difficult to understand intuitively. For this reason, scientific and technical personnel have researched and developed hydraulic system internal leakage measurement methods, such as the Chinese patent No. 95121774.7 "Detection method for hydraulic elevator oil leakage". The first step is to perform floor service operations when receiving a car call signal 1. Reset the timer to zero and measure the oil temperature; the second step is to increase the count value of the timer when the car stops at a cer...

AI Technical Summary

Problems solved by technology

For a long time, internal leakage has been an important problem in the hydraulic system. It is like a black box for equipment maintenance personnel. It contains a lot of important information in the hydraulic system, but it is difficult to understand intuitively.

For this reason, scientific and technical personnel have researched and developed hydraulic system internal leakage measurement methods, such as the Chinese patent No. 95121774.7 "Detection method for hydraulic elevator oil leakage". The first step is to perform floor service operations when receiving a car call signal 1. Reset the timer to zero and measure the oil temperature; the second step is to increase the count value of the timer when the car stops at a certain floor and the door opening range switch does not deviate from the door opening range sensor plate; the third step is to measure the oil temperature and time Until the car deviates from the normal position; the fourth step is to measure the oil temperature when the count value of the timer is zero, the oil temperature when the door opening range switch deviates from the sensor plate, and the time when the car deviates from the normal position to the abnormal position; the fifth The first step is to compare the lowering amount of the car with the preset value; the sixth step is to judge the state of the elevator system; the defect is that the measurement method is cumbersome and the versatility is relatively poor. Due to the limitation of its elevator products, it cannot be carried out on other hydraulic systems. Promote application

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