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Double-cylinder hydraulic actuator

A hydraulic actuator, dual-drive technology, applied in engine components, valve details, valve operation/release devices, etc., can solve the problems of high manufacturing cost, large structure size, large installation size, etc., to achieve compact structure, low cost The effect of small manufacturing cost and installation size

Inactive Publication Date: 2014-03-05
JIANGSU YUANWANG INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this way, the structural size (especially the axial size) of the entire hydraulic actuator must be relatively large, the manufacturing cost is high, and the required installation size is large.

Method used

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  • Double-cylinder hydraulic actuator
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Embodiment Construction

[0013] The present invention will be further described below according to the accompanying drawings and in conjunction with the embodiments.

[0014] The double-cylinder hydraulic actuator shown in the drawings includes a hydraulic cylinder assembly 1 and an actuator 2; the hydraulic cylinder assembly 1 includes a cylinder body 1.1 and a piston 1.2; the actuator 2 includes a pinion shaft 2.1 and a rack arranged on the side of the piston 1.2 2.2; the gear shaft 2.1 runs through the cylinder body 1.1 and meshes with the rack 2.2; the hydraulic cylinder assembly 1 is divided into two groups, distributed on both sides of the gear shaft 2.1, forming a double drive structure for the gear shaft 2.1; in this embodiment, two hydraulic The oil chambers on different sides of the cylinder assembly 1 are connected.

[0015] In order to adjust the moving position of the piston 1.2 in the hydraulic cylinder assembly 1, a limit screw 1.4 is provided on the end flange of the cylinder body 1.1....

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Abstract

The invention discloses a double-cylinder hydraulic actuator. The double-cylinder hydraulic actuator comprises two hydraulic cylinder subassemblies and an actuating mechanism, wherein each hydraulic cylinder subassembly comprises a cylinder body and a piston; the actuating mechanism comprises a gear shaft and racks arranged on side surfaces of the pistons; the gear shaft penetrates in the cylinder bodies to be meshed with the racks; and the two hydraulic cylinder subassemblies are distributed on two sides of the gear shaft, so that a double-driving structure for the gear shaft is formed. The double-cylinder hydraulic actuator is characterized in that oil cavities formed in different sides of the two hydraulic cylinder subassemblies are connected with each other; and limiting screws are arranged on flanges at ends of the cylinder bodies. The double-cylinder hydraulic actuator is compact in structure, small in mounting size, large in transmission torque and low in manufacturing cost.

Description

technical field [0001] The invention relates to a hydraulic actuator, in particular to a valve hydraulic actuator. Background technique [0002] A large number of valves are used as control components in modern pipeline network projects. In many occasions, it is required to remotely control the opening or closing of the valves by the console, and hydraulic actuators are usually used to drive them. The hydraulic actuators in the prior art generally include a power cylinder and an actuator. The actuator includes a gear shaft and a rack arranged on the side of the piston. The piston is driven by the power cylinder to move, and the gear shaft meshed with it is driven by the rack on the side of the piston to rotate. , the valve is driven by the gear shaft to open or close. The hydraulic actuator in the prior art is a single cylinder. If a valve with a large torque is to be driven, the diameter of the piston or the medium pressure needs to be increased in terms of the power cylin...

Claims

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Application Information

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IPC IPC(8): F16K31/12F16K31/54
CPCF16K31/122F16K31/54
Inventor 孙荣顾加兵徐荣
Owner JIANGSU YUANWANG INSTR
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