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Digitally controlled leading type proportional flow valve

A proportional flow valve and digital control technology, which is applied in fluid pressure actuators, servo motor components, mechanical equipment, etc., can solve problems such as high cost, low precision, and poor oil pollution resistance, and achieve low cost and high work efficiency. Reliable, pollution-resistant results

Inactive Publication Date: 2011-08-17
山西北山重工集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problems of high cost, poor oil pollution resistance and low precision of the above-mentioned control valve, and provide a high-speed on-off valve with simple structure, low price and strong pollution resistance. Digitally controlled pilot-operated proportional flow valve that can control the flow of the main valve by the opening and closing time of the on-off valve

Method used

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  • Digitally controlled leading type proportional flow valve

Examples

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Effect test

Embodiment 1

[0020] Such as figure 2 As shown, the digitally controlled pilot-operated proportional flow valve in this embodiment includes a two-position two-way high-speed switching valve 1, which consists of a main valve core 2, a main valve sleeve 3, a main valve spring 4, and a main valve oil inlet P A , main valve oil outlet P B , Main valve control chamber P C and flow feedback throttle slot W C The main valve 8 consists of: it also includes a valve core 5, a valve sleeve 6, a spring 7, a fixed orifice R, a first control chamber V A , the second control chamber V B , variable throttle edge J LB , fixed value flow meter oil inlet P A2 And fixed value flowmeter oil outlet P B2 The fixed-value flowmeter 10 constituted, the valve core 5 is arranged in the valve sleeve 6 and the bottom end of the valve core 5 and the bottom inside the valve sleeve 6 constitute the first control chamber V A , the spring 7 is installed in the second control chamber V set in the middle of the spool 5...

Embodiment 2

[0023] Such as image 3 As shown, the digitally controlled pilot-operated proportional flow valve in another embodiment of the present invention has the same structure as that in Embodiment 1, and the connection between the two-position two-way high-speed switch valve 1 and the main valve 8 and the fixed value flow device 10 In different ways, the main valve control chamber P C With two-position two-way high-speed switch valve 1 oil inlet P A1 Connection, oil inlet P of fixed value flowmeter A2 With two-position two-way high-speed switch valve 1 oil outlet P B1 Connection, fixed value flow meter outlet P B2 and main valve oil outlet P B connect.

Embodiment 3

[0025] Such as Figure 4 As shown, the digitally controlled pilot proportional flow valve in another embodiment of the present invention is used in combination with two digitally controlled pilot proportional flow valves. It includes two two-position two-way high-speed switching valves 1 and 1', composed of the second main valve core 12, two second main valve sleeves 13 and 13', two second main valve springs 14 and 14', the total Oil inlet P, first oil outlet A, second oil outlet B, oil return tank port T, main valve first control chamber P C1 , The second control chamber P of the main valve C2 , the first flow feedback throttle slot W C1 , the second flow feedback throttling groove W C2 Composed of the second main valve 18 and two fixed value flowmeters 10 and 10'; two second main valve sleeves 13 and 13' are coaxially arranged at both ends of the second main valve core 12, and the first main valve spring 14 Set in the first control chamber P of the main valve C1 , the s...

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Abstract

The invention relates to a digitally controlled leading type proportional flow valve belonging to a device which controls flow rate of a hydraulic actuator in an electric hydraulic control system. The digitally controlled leading type proportional flow valve mainly solves the technical problems that the existing control valve has high cost, poor oil pollution resisting capacity and low precision. In the technical scheme in the invention, the digitally controlled leading type proportional flow valve comprises a two-position two-way high-speed switch valve and a main valve which consists of a main valve element, a main valve jacket, a main valve spring, a main valve oil inlet PA, a main valve oil outlet PB, a main valve control cavity PC and a flow rate feedback throttling groove WC, further the digitally controlled leading type proportional flow valve also comprises a constant value flow device consisting of a valve element, a valve jacket, a fixed orifice R, a first control cavity VA, a second control cavity VB, a variable throttling side JLB, an oil inlet PA2 of a constant value flow device, and an oil outlet PB2 of the constant value flow device. The digitally controlled leading type proportional flow valve has the advantages of simple structure and strong contamination resistance, and works reliably.

Description

technical field [0001] The invention relates to a digitally controlled pilot-operated proportional flow valve, which belongs to a device for controlling the flow supplied to a hydraulic actuator in an electro-hydraulic control system, especially a flow that can be controlled continuously and switchably by means of digital pulse width modulation. valve. Background technique [0002] The devices that control the hydraulic execution speed in the electro-hydraulic control system include proportional flow valves and proportional directional flow valves. Since the flow through the valve is affected by the pressure difference between the two ends of the valve port, the traditional method is to connect a pressure regulator in series at the oil inlet or outlet of the proportional throttle valve and the proportional directional throttle valve that control the opening area of ​​the valve. The differential compensator maintains the pressure difference at the valve port basically consta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/02
Inventor 权龙李斌孙晋萍
Owner 山西北山重工集团有限公司
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