Flow control device and hydraulic system with the device
A flow control device and a technology for controlling oil chambers, applied in fluid pressure actuators, servo motors, servo motor components, etc.
Active Publication Date: 2016-03-16
LIUZHOU LIUGONG HYDRAULIC COMPONENTS +1
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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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[0023] The specific implementation scheme is described below in conjunction with the drawings.
[0024] Such as Figure 2 to Figure 7 As shown, the flow control device 22 includes a two-position three-way reversing valve 4, 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 an axial The moving throttle spool 10, the opening and moving side of the throttle spool 10 is provided with a limiting piston 1 that limits the moving position of the throttle spool 10, and the limiting piston 1 can move along the axis of the throttle spool 10 , Between the limit piston 1 and the throttle valve core 10 is a spring cavity 14. A throttle valve core return spring 12 is arranged in the spring cavity 14. One end of the throttle valve core return spring 12 is in contact with the limit piston 1. One end is in contact with the throttle valve core 10, and a pipeline is provided on the throttle valve core 1...
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The invention relates to a flow control device, which provides a flow control device and a hydraulic system with the flow control device in order to solve the shortcoming that hydraulic oil cylinders with different loads cannot coordinate and work at the same time. The flow control device includes a two-position three-way reversing valve and a one-way throttle valve. The one-way throttle valve includes a throttle spool that can move in the axial direction. One side of the throttle spool is provided with a limit piston. It can move along the axis of the throttle spool, and the limit piston is controlled by the control oil chamber connected with the two-position three-way reversing valve. The throttle spool has different valve openings when it is in different positions. In the hydraulic system, the two-position three-way reversing valve is linked with the reversing control of one of the hydraulic cylinders. When both hydraulic cylinders are active, the drive oil circuit of one of the hydraulic cylinders is throttled, and the throttling part is used for the other. The driving oil circuit of one hydraulic cylinder is compensated to realize the coordinated work of two hydraulic cylinders at the same time.
Description
Technical field [0001] The invention relates to a hydraulic system for engineering machinery, 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 work units, such as hydraulic cylinders. When working, the work load of each actuation unit is large or small, such as figure 1 As shown, the hydraulic pump source is connected to the first hydraulic cylinder 19 and the second hydraulic cylinder 18 through the first control reversing valve 16 and the second control reversing valve 17 respectively. The load of the second hydraulic cylinder 18 is less than that of the first hydraulic cylinder 19 Load, when the pilot control terminal XA1 (XB1) of the first control reversing valve 16 and the pilot control terminal XA2 (XB2) of the second control reversing valve 17 are supplied with oil at the same time, the first contro...
Claims
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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