Qualified measuring device and method of leakage rate of sealing rings for hydraulic cylinder
A quantitative measurement and sealing ring technology, applied in the hydraulic field, can solve the problems of difficult collection of external leakage and inability to eliminate interference
Active Publication Date: 2016-08-17
江苏宏昌天马物流装备有限公司
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Problems solved by technology
The flowmeter method can also be used to measure the internal leakage of the hydraulic cylinder. The high-pressure oil is passed through one cavity of the hydraulic cylinder, the piston rod is fixed or moved to the bottom, and the other cavity is connected to the flowmeter. The oil passing through the flowmeter is the internal leakage. The disadvantage of this method is that the leakage of the hydraulic cylinder can only be measured statically, and the interference of the external leakage on the measurement of the internal leakage cannot be ruled out
Due to the difficulty of collecting external leakage, there is no good method to quantitatively measure the external leakage of hydraulic cylinders, and the measurement of external leakage mainly adopts the observation method
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[0020] The present invention will be further described below in conjunction with accompanying drawing:
[0021] Such as figure 1 As shown in the sectional view of the present invention, the device of the present invention mainly includes a cylinder body 1, a piston rod 2, a piston sleeve 3, an end cover and a sealing ring. It is easy to disassemble and replace the form of the sealing ring. The piston sleeve is placed in the inner cavity of the cylinder and fits closely with the inner wall of the cylinder with the same diameter; 4 grooves are opened on the outer wall of the piston sleeve from left to right, and each groove Install a sealing ring in the center, the sealing rings from left to right are sealing ring A4-1, sealing ring B4-2, sealing ring C4-3, sealing ring D4-4; The detection oil passage A5-1 is opened downwards to the piston rod in the area, and the detection oil passage A is drawn from one end of the piston rod and connected with the measuring cylinder A7-1 thro...
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The invention provides a qualified measuring device and method of leakage rate of sealing rings for a hydraulic cylinder. The device mainly comprises a cylinder body, a piston rod, a piston sleeve, end covers and the sealing rings, wherein the piston rod and the piston sleeve are connected through a bolt and then positioned into the cylinder body; the piston sleeve is provided with three detecting oil channels which are positioned in the piston rod; the detecting oil channels are connected to corresponding hoses and measuring cylinders; four sealing rings are arranged on the outer wall of the piston sleeve; the end covers are mounted at two ends of the cylinder body; a dustproof ring, an O-shaped ring A, a guide ring A, a guide ring B and one sealing ring are sequentially arranged in each end cover mounting hole; the detecting oil channels are downwards formed from the top end of the cylinder body and pass through the corresponding end covers; the measuring barrels communicate with the upper parts of the detecting oil channels; rod bodies at two ends of the piston rod extend out from the corresponding end covers; an oil port A and an oil port B are symmetrically formed in the top part of the cylinder body. The device has the advantages of being reasonable in design, simple and clear in measuring, and high in accuracy.
Description
technical field [0001] The invention relates to the technical field of hydraulic pressure, in particular to a quantitative measurement device and a measurement method for the leakage of a sealing ring for a hydraulic cylinder. Background technique [0002] The leakage of a hydraulic cylinder is an important indicator to determine the performance of a hydraulic cylinder, and it is also the basis for judging the sealing performance of a sealing ring for a hydraulic cylinder. The main seals in the hydraulic cylinder include the piston seal and the piston rod seal, which determine the internal leakage and external leakage of the hydraulic cylinder respectively. At present, the method of measuring the leakage of the hydraulic cylinder is mainly to use the measuring cup method to measure the internal leakage of the hydraulic cylinder, that is, to pass high-pressure oil in one cavity of the hydraulic cylinder, fix the piston rod or move it to the bottom, and the outlet of the other...
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IPC IPC(8): F15B19/00
CPCF15B19/005
Inventor 翟富刚孔祥东姚静郝晓蓓
Owner 江苏宏昌天马物流装备有限公司