Hydraulic oil cylinder

Abstract

The invention discloses a hydraulic oil cylinder, which relates to the technical field of hydraulic equipment and solves the technical problems that the prior hydraulic oil cylinder has slow bufferingforce adjustment and poor adjustment effect. The oil cylinder comprises a cylinder barrel, end covers at the front end and the rear end of the cylinder barrel, and a piston in the cylinder barrel, wherein the piston separates the cylinder barrel into a front cavity and a rear cavity, and the end cover corresponding to each cavity is provided with an oil discharge cavity communicated with the cavity. The hydraulic oil cylinder is characterized in that the end cover is provided with at least one adjustable buffer valve, the end cover where each buffer valve is positioned is provided with a passage for communicating the cavity corresponding to the end cover and an oil inlet of the buffer valve, and an oil discharge port of the buffer valve is communicated with the oil discharge cavity of theend cover. The hydraulic oil cylinder provided by the invention can quickly and accurately adjust the buffering force so as to improve the production efficiency and the product percent of pass.

Description

technical field [0001] The invention relates to hydraulic equipment technology, in particular to a technology for driving a hydraulic oil cylinder for opening and closing a steam valve. Background technique [0002] The opening and closing of steam turbine steam valves are all driven by hydraulic cylinders. Because the buffer gap of the hydraulic cylinder is difficult to calculate accurately, if the buffer gap is too small, the closing time of the steam valve will not meet the relevant national standards or even exceed the relevant national standards due to too much buffer force when the hydraulic cylinder quickly enters the buffer According to the relevant national standards, if the buffer gap is too large, when the hydraulic cylinder enters the buffer zone quickly, the closing force of the steam valve will be too large due to the small buffer force, which will damage the sealing surface of the steam valve. Therefore often will carry out many tests to adjust its buffer gap...

AI Technical Summary

Problems solved by technology

Because the buffer gap of the hydraulic cylinder is difficult to calculate accurately, if the buffer gap is too small, the closing time of the steam valve will not meet the relevant national standards or even exceed the relevant national standards due to too much buffer force when the hydraulic cylinder quickly enters the buffer According to relevant national standards, if the buffer gap is too large, when the hydraulic cylinder enters the buffer zone quickly, the closing force of the steam valve will be too large due to the small buffer force, which will damage the sealing surface of the steam valve.

Therefore, it is often necessary to carry out multiple tests to adjust the buffer gap during processing and manufacturing, which not only affects the production efficiency, but also the adjustment effect is often unsatisfactory, which affects the qualified rate of the product.

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