SU1488612A1 - Method of determining working fluid leak through clearances of hydraulic valve - Google Patents

Description

The invention makes it possible to reduce labor costs during the testing of hydraulic units by improving the accuracy of measuring the amount of leakage. The working fluid is injected through the supply lines under pressure into the test hydraulic apparatus. According to the readings of the graduated measuring capacitance, determine the amount of leakage per unit of time. The measuring tank is installed in the supply line and filled with working fluid, and then the fluid is squeezed out of it under pressure. This method requires minimal effort. 1 il.

The invention relates to mechanical engineering and can be used when testing hydraulic devices.

The purpose of the invention is to reduce labor costs by improving the accuracy of the measurement of the leakage volume.

The drawing shows an example of a device that implements a method for determining the leakage of working fluid through the gaps of a hydraulic apparatus.

The device contains a pump 1, the test hydraulic device 2, a pressure gauge 3, a graduated scale 4, a measuring capacity 5 (rod end of the cylinder), a piston 6, a main line 7 supplying the working fluid to the hydraulic device 2, a distributor 8 and a crane 9, a piston cavity 10 of the cylinder, tank 11 and safety valve 12.

The method of determining the leakage of working fluid through the gaps of the hydraulic apparatus is implemented as follows.

⁷ When preparing the stand for leak detection by pump 1 through valve 8 and valve 9 (at the position of the valve section (a) and valve (c), as shown in the drawing), the working fluid is injected into the measuring tank 5 and from the piston cavity 10 of the cylinder through the valve 8 is discharged into tank 11.

As soon as the piston 6 of the cylinder reaches the stop, the pressure, controlled by the pressure gauge 3, rises and

1488612

ί

1488612

Ο

the working fluid is discharged into the tank through the gaps of the hydraulic unit 2 and the safety valve 12, while the stand is ready to check for leaks. ,

To determine the leakage of working fluid set the valve section to position (b) and the valve 9 to position d.

When this pump 1 through the distribution of the divider 8, the liquid is injected into the piston cavity 10 of the cylinder and from the measuring tank 5 through the valve 9 enters at a certain pressure set by the setting of the safety valve 12, through the gaps of the tested hydraulic unit 2. Drain the liquid into the tank the measure of the tank 5 is blocked in this position by the crane 9.

Depending on the size of the gaps in 2 precession pairs of the tested hydraulic apparatus 2, the volume of fluid leaks is recorded on a scale of 4.

The proposed method is characterized by low labor costs for its implementation 2 and ensures high accuracy of measurements, since there are no additional leaks on line 7 connecting the measuring tank 5 to the hydraulic unit under test.

With this method, all leaks of the working fluid inside the hydraulic unit 2 are recorded.

Claims (1)

Claim The method of determining the leakage of working fluid through the gaps of the hydraulic device, which consists in that the working fluid is injected through the supply lines under pressure to the test hydraulic apparatus and according to the readings of the graduated measuring capacity, the amount of leakage per unit of time is determined, in order to reduce labor costs by increasing Accuracy of measuring the volume of leaks, measuring capacity is installed in the supply line, before determining the magnitude of the volume of leaks, the measuring capacity is filled with working fluid and then under pressure, displaces the working fluid from it.