A micro-displacement driven switch valve

Abstract

The invention discloses a micro-displacement driving switching valve. The micro-displacement driving switching valve comprises a micro-displacement driver, a micro-displacement amplifying mechanism, a switching valve element assembly and a valve body base. The micro-displacement amplifying mechanism amplifies micro-displacement output by the micro-displacement driver according to a three-ball and two-triangle-slope combined triangle amplification principle. The switching valve element assembly balances hydraulic pressure and facilitates assembly of a valve element through an upper valve element and lower valve element equal-diameter separation structure. The valve body base integrates a micro-displacement driver mounting space, a micro-displacement amplifying mechanism mounting space and a switching valve element assembly mounting space. A micro-displacement amplifier designed by means of the ball-triangle amplification principle can amplify displacement from a micron grade to a millimeter grade. The micro-displacement driving switching valve is simple in structure and easy to realize. In order to reduce driving resistance, a switching valve is of an equal-diameter separation structure, so that axial hydraulic pressure applied to the valve element is substantially reduced, and assembly is facilitated. The valve body base integrates a micro-displacement driving part, a displacement amplifying part and a switching valve sleeve part, and the structure is compact.

Description

technical field [0001] The invention belongs to the field of hydraulic components and relates to a micro-displacement driven switch valve. Background technique [0002] Digital hydraulics has become the development trend of hydraulic technology due to its advantages of high reliability, high efficiency, good control performance, redundant circuits, and low energy consumption. High-speed on-off valve is a key component in digital hydraulics. Miniature electromagnets are commonly used as their electro-mechanical converters. The high-speed on-off valve developed for digital hydraulic valve blocks by Tampere University of Technology in Finland is a representative of this principle. In order to further increase the switching speed of switching valves, new driving materials (piezoelectric materials, magnetostrictive materials) are used in electro-mechanical converters. The direct driving displacement of these materials is at the micron level, which must be amplified by displacemen...

AI Technical Summary

Problems solved by technology

The lever displacement amplification mechanism usually uses multi-stage levers for amplification, and its mechanism has disadvantages such as difficult processing and complicated parameter determination; although the hydraulic displacement amplification mechanism has a simple structure, it needs a better sealing design, and the displacement amplification is affected by liquid leakage. and other shortcomings

Due to the ingenious mechanism design of the triangular principle, there will be a problem of insufficient magnification

For the cone valve structure commonly used in on-off valves, when the design of the spool structure is unreasonable, due to the reduction of the driving force, it is easy to cause the problem of insufficient driving force of the spool, which affects the function of the on-off valve

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