Digital pure water hydraulic proportional overflow valve

A proportional relief valve, digital technology, used in fluid pressure actuation devices, servo motor components, mechanical equipment, etc., can solve problems such as high cost and microbial contamination, achieve automation, improve steady-state accuracy, and achieve pressure. The effect of the adjustment function

Inactive Publication Date: 2012-02-15
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, high water-based hydraulic fluids have some disadvantages such as being more susceptible to microbial contamination and relatively high cost.

Method used

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  • Digital pure water hydraulic proportional overflow valve
  • Digital pure water hydraulic proportional overflow valve
  • Digital pure water hydraulic proportional overflow valve

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with accompanying drawing.

[0022] like figure 1 As shown, the digital pure water hydraulic proportional relief valve includes a pilot valve, an electric-mechanical converter of the pilot valve, and a main valve.

[0023] The electro-mechanical converter of the pilot valve includes a servo motor 1 and a cam 4, and the cam 4 is assembled on the motor shaft through a flat key.

[0024] The pilot valve includes a push rod 7, a pilot spring 9, a pilot valve core 10, a pilot valve sleeve 11 and a pilot valve seat 12; the cam 4 in the electro-mechanical converter converts the rotary motion of the servo motor 1 into a linear motion and passes the top The rod 7 pushes the pilot spring 9 to push the pilot spool 10 to move, so that a variable orifice is formed between the conical surface and the inner surface shoulder of the pilot valve sleeve 11 (such as figure 2 Middle b) As the variable fluid resistance o...

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PUM

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Abstract

The invention discloses a digital pure water hydraulic proportional overflow valve. The pure water hydraulic proportional overflow valve in China at present has the defects of narrow pressure-regulating range, great hysteresis loop, great steady state pressure-regulating deviation and the like. The overflow valve is characterized in that: firstly hydrostatic bearing grooves are respectively arranged between a guide valve core and a guide valve sleeve and between a main valve core and a main valve sleeve, thereby solving the problem that the viscosity of the pure water is lower so as to generate the thinner lubricating water film and insufficient lubrication; secondly, the characteristics that the viscosity of the pure water is lower, the gap between the guide valve core and the guide valve sleeve is easy to leak, thereby designing guide valve gap liquid resistance; and the formed guide valve pi bridge liquid resistance network is used for improving the steady state precision of the overflow valve, thereby changing the disadvantage of the pure water hydraulic proportional overflow valve into an available condition. The digital pure water hydraulic proportional overflow valve provided by the invention has the advantage of being capable of achieving the automation of pressure-regulating function of a pure water hydraulic system.

Description

technical field [0001] The invention belongs to the technical field of fluid transmission and control, and relates to a digital pure water hydraulic proportional overflow valve. Background technique [0002] The transmission medium used in the pure water hydraulic transmission system—pure water has many advantages that traditional hydraulic oil does not have: environmental friendliness, low purchase and use costs, good flame retardancy and safety, easy maintenance, high rigidity, and low temperature rise And other characteristics, which is also the reason why pure water hydraulic transmission is valued at home and abroad. However, in addition to the above advantages, pure water also has the characteristics of low viscosity, poor lubricity, strong electrical conductivity, and high vaporization pressure, which brings difficulties to the research of pure water hydraulic transmission technology. The most prominent difficulty is that due to the low viscosity of pure water (only ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/02
Inventor 周华金斌谢安桓杨华勇
Owner ZHEJIANG UNIV
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