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Flow control device and hydraulic system with the same

A flow control device, a technology for controlling oil cavity, applied in the direction of fluid pressure actuation device, servo motor, servo motor assembly, etc.

Active Publication Date: 2014-04-16
LIUZHOU LIUGONG HYDRAULIC COMPONENTS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a method that can make the same pressure oil supply oil to hydraulic cylinders with different loads at the same time, so that they can work in harmony at the same time. Coordinated flow control device and hydraulic system having the flow control device

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  • Flow control device and hydraulic system with the same
  • Flow control device and hydraulic system with the same
  • Flow control device and hydraulic system with the same

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Embodiment Construction

[0023] The specific implementation will be described below in conjunction with the accompanying drawings.

[0024] Such as Figure 2 to Figure 7As shown, the flow control device 22 includes a two-position three-way reversing valve 4 and a one-way throttle valve, wherein the one-way throttle valve is arranged in the main control valve body 7, and the one-way throttle valve includes The moving throttle spool 10, the opening and moving side of the throttle spool 10 is provided with a limit piston 1 to limit the moving position of the throttle spool 10, and the limit piston 1 can move along the axis of the throttle spool 10 , between the limiting piston 1 and the throttle spool 10 is a spring cavity 14, a throttle spool return spring 12 is arranged in the spring cavity 14, and one end of the throttle spool return spring 12 is in contact with the limiting piston 1, and in addition One end is in contact with the throttle valve core 10 , and a pipeline is provided on the throttle va...

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Abstract

The invention relates to a flow control device and a hydraulic system with the same. The shortcoming that hydraulic oil cylinders with different loads cannot carry out coordination work at the same time is overcome. The flow control device comprises a two-position-three-way reversing valve and a single-direction throttle valve which comprises a throttle valve element which can move in the axial direction. A limiting piston is arranged on one side of the throttle valve element and can move along the axis of the throttle valve element. The limiting piston is controlled through a control oil cavity connected with the two-position-three-way reversing valve, and the throttle valve element has different valve port opening degrees when being in different positions. In the hydraulic system, the two-position-three-way reversing valve and one hydraulic oil cylinders are in reversing control linkage, when two hydraulic oil cylinders both operate, a driving oil way of one of the hydraulic oil cylinders is subjected to throttling, the throttling part carries out compensation on a driving oil way of the other hydraulic oil cylinder, and coordination work of the two hydraulic oil cylinders at the same time is achieved.

Description

technical field [0001] The invention relates to a construction machinery hydraulic system, in particular to a flow control device and a hydraulic system with the device. Background technique [0002] Equipment that uses hydraulic power to drive work, such as many hydraulic engineering machinery, usually has multiple working units, such as hydraulic cylinders. When working, the loads of each actuating unit vary, such as figure 1 As shown, the hydraulic pump source passes through the first control reversing valve 16 and the second control reversing valve 17 and the first hydraulic cylinder 19 and the second hydraulic cylinder 18 respectively, and the load of the second hydraulic cylinder 18 is less than that of the first hydraulic cylinder 19 Load, when the pilot control port XA1 (XB1) of the first control selector valve 16 and the pilot control port XA2 (XB2) of the second control selector valve 17 receive oil at the same time, the first control selector valve 16 and the seco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/06F15B11/22
Inventor 王宜前章二平贾靖朱庆轩高英达蒋拓
Owner LIUZHOU LIUGONG HYDRAULIC COMPONENTS