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A Variable Area Gradient Digital Rotary Valve

A variable area and gradient technology, applied in fluid pressure actuators, servo motor components, mechanical equipment, etc., to achieve high precision, uniform force, and breakthrough processing difficulties.

Inactive Publication Date: 2015-11-18
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, combining the characteristics and advantages of the rotary valve itself, it is imperative to develop a servo rotary valve that is simple to process and can realize the combined functions of direction and flow control. At present, there is no rotary valve with this function.

Method used

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  • A Variable Area Gradient Digital Rotary Valve
  • A Variable Area Gradient Digital Rotary Valve
  • A Variable Area Gradient Digital Rotary Valve

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0018] The specific embodiments of the present invention will be described in detail below in conjunction with the technical solutions and accompanying drawings.

[0019] as attached Figure 1~4 As shown, the five annular grooves of the valve sleeve 3 nested in the inner cavity of the valve body 4 correspond to the positions of the annular grooves in the inner cavity of the valve body 4 one by one, and the five annular grooves in the inner cavity of the valve body 4 are respectively connected to the left Oil port T1, left working oil port A, oil inlet P, right working oil port B, right return oil port T2.

[0020] The four groups of rectangular control valve ports 12 processed on the valve sleeve 3, from left to right, the first group of valve ports communicate with the left oil return port T1, the second and third groups of valve ports communicate with the oil inlet P, and the fourth group of valve ports It communicates with the right oil return port T2. Two groups of oil p...

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Abstract

The invention discloses an area-gradient-variable digital rotary valve, and belongs to the technical field of hydraulic control elements. The area-gradient-variable digital rotary valve is characterized in that a differential screw sleeve connected with a valve element is rotated to adjust the axial direction of the valve element to change area gradient of the rotary valve, four groups of bow-shaped grooves are processed on the valve element and control valve ports on the valve sleeve correspondingly, the bow-shaped grooves and the control valve ports are mutually communicated or enclosed to control output flow when the valve element and the valve sleeve rotate relatively, and a servo valve can serve as a cross. The area-gradient-variable digital rotary valve has the advantages that the valve element and the valve sleeve rotate relatively, so that friction is small and anti-pollution ability is high; the rotary valve is featured in zero opening, so that control on micro flow can be realized; dynamic performance is high, structure is simple and compact, radial stress is balanced, and limitation of large processing difficulty of conventional rotary valves is broken through.

Description

technical field [0001] The invention belongs to the technical field of hydraulic control components, and relates to an electro-hydraulic flow digital rotary valve device, in particular to a variable area gradient digital rotary valve. Background technique [0002] The dynamic triaxial tester is often used to test the strength and deformation characteristics of soil. In order to study the deformation characteristics of soil samples in the test, it is necessary to load forces of different amplitudes through the hydraulic servo system and observe the relationship between stress and strain. For this reason, servo valves with different flow rates are prepared for different samples, so as to ensure the control accuracy during the test and obtain ideal test data. However, during the frequent replacement of the servo valve, it is easy to mix dust, impurities and other substances into the hydraulic servo oil circuit, causing the servo valve to fail. Even if several servo valves with...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F15B13/02
Inventor 桑勇王晓
Owner DALIAN UNIV OF TECH
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