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A high-precision large-flow multi-way valve with disturbance compensation

A disturbance compensation, high-precision technology, applied in the direction of fluid pressure actuators, servo motor components, mechanical equipment, etc., can solve the problem of limiting the flow capacity of the main valve, reduce the compensation pressure difference, improve flow control accuracy and control Stability, the effect of improving control stability

Active Publication Date: 2022-04-15
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Further, the traditional differential pressure compensator adopts the form of slide valve, which limits the flow capacity of the main valve

Method used

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  • A high-precision large-flow multi-way valve with disturbance compensation
  • A high-precision large-flow multi-way valve with disturbance compensation
  • A high-precision large-flow multi-way valve with disturbance compensation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] like Figure 7 As shown, a high-precision and large-flow multi-way valve with disturbance compensation includes main oil circuit 1, return oil circuit 2, reversing valve 3, pilot control type differential pressure compensator 4, shuttle valve 5, load sensing oil circuit 6. Wherein, the reversing valve 3 is an electronic proportional reversing valve as shown in the figure, and may also be one of a hydraulically controlled reversing valve and an electro-hydraulic proportional reversing valve.

[0037] like image 3 As shown, the pilot control type differential pressure compensator 4 includes a pilot compensator 7 , a main valve 8 , a first damping hole 9 and a second damping hole 10 .

[0038] like Figure 4 , 5As shown, the pilot compensator 7 includes the left valve body 11, the right valve body 12, the pilot compensator spool 13, the compensator spring 14, the proportional electromagnet 15, the first displacement sensor 16, the first control chamber P E , the secon...

Embodiment 2

[0047] like Figure 8 As shown, a high-precision and large-flow multi-way valve with disturbance compensation includes the first valve group 26 and the tail valve group 28. The two valve groups share a unified main oil circuit 1, return oil circuit 2 and load-sensitive oil circuit. 6. Each valve group includes a reversing valve 3, a pilot-controlled differential pressure compensator 4, and a shuttle valve 5. The reversing valve 3 is an electronic proportional reversing valve as shown in the figure, and it can also be a hydraulic control reversing valve. One of valves and electro-hydraulic proportional directional valves.

[0048] like image 3 As shown, the pilot control type differential pressure compensator 4 includes a pilot compensator 7 , a main valve 8 , a first damping hole 9 and a second damping hole 10 .

[0049] like Figure 4 , 5 As shown, the pilot compensator 7 includes the left valve body 11, the right valve body 12, the pilot compensator spool 13, the compen...

Embodiment 3

[0059] like Figure 9 As shown, compared with Embodiment 2, an intermediate valve group 27 is added between the first valve group 26 and the tail valve group 28, and the oil inlet on the side of the shuttle valve in the first valve group 26 and the intermediate valve group 27 It is connected to the oil outlet of the shuttle valve in the next valve group, and the oil inlet on one side of the shuttle valve in the tail valve group 28 is connected to the fuel tank.

[0060] When the number of valve groups is further increased, including the first valve group, the tail valve group and some intermediate valve groups, the connection mode of the shuttle valve in each valve group is the same as that of the first valve group 26, the middle valve group 27, The tail valve group 28 is the same.

[0061] like Figure 10 As shown, when the pilot control type differential pressure compensator 4 is set in front of the valve, the pilot compensator 7 is normally open, that is, the pilot compen...

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Abstract

A high-precision and large-flow multi-way valve with disturbance compensation, including at least one valve group, each valve group shares a unified main oil circuit, return oil circuit and load sensitive oil circuit, and each valve group includes a reversing valve and pressure Differential compensator; the differential pressure compensator includes a pilot compensator, a main valve and a pilot oil circuit. The pilot compensator is provided with a controllable pressure relief chamber. The oil circuit, the oil inlet of the controllable pressure relief chamber, and the oil port of the pilot control chamber of the main valve. The invention designs a new type of pilot control type differential pressure compensator. The pilot valve directly driven by the proportional electromagnet is used as the differential pressure compensator to compensate the load difference. Large and proportional electromagnets cannot directly participate in the control problem; furthermore, the main valve of the new pilot-controlled differential pressure compensator adopts a cartridge valve structure, which has the characteristics of large flow capacity and is easy to realize large flow control of multi-way valves.

Description

technical field [0001] The invention relates to the technical field of hydraulic control, in particular to a high-precision and large-flow multi-way valve with disturbance compensation for engineering machinery. Background technique [0002] The multi-way valve is a multi-functional hydraulic valve composed of a main valve, a load holding valve, an oil supply valve and a safety valve, and is the core component for controlling the hydraulic multi-actuator system of construction machinery. At present, the multi-way valves commonly used in construction machinery mainly include open center multi-way valves and closed center multi-way valves. [0003] The open center multi-way valve accurately controls the system flow through the complex throttling groove design. Flow to low load actuators, there is a problem of poor handling. The closed-center multi-way valve often forms a load-sensing system with a load-sensing pump, and a pressure difference compensator is arranged before or...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B13/06F15B13/02
CPCF15B13/06F15B13/021F15B13/026
Inventor 权龙王波杨敬王鹤黄伟男
Owner TAIYUAN UNIV OF TECH
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