Piezoelectric valve

Abstract

The invention discloses a piezoelectric valve comprising a front baffle plate, a flexible bracket, a rear baffle plate, a valve body assembly, a piezoelectric driver, a force applying screw and a sliding steel ball; the front baffle plate and the rear baffle plate are the same in structure; the flexible bracket is arranged between the front baffle plate and the rear baffle plate; the piezoelectric driver is arranged in the flexible bracket; the valve body assembly is arranged below the flexible bracket; the force applying screw and the sliding steel ball are arranged above the flexible bracket; and one end of the force applying screw tightly is abutted against the sliding steel ball. The piezoelectric driver is manufactured by combining the traditional manufacturing process and the micro manufacturing process. The flexible bracket has a hinge structure. The piezoelectric valve can satisfy the application of the micro-propulsion system of the aircraft, and can also be suitable for gas and liquid medium with good sealing performance.

Description

technical field [0001] The present invention relates to a valve, more particularly, refers to a piezoelectric valve which adopts a piezoelectric driver to drive a flexible hinge and is manufactured by combining a traditional manufacturing process with a micro-manufacturing process. Background technique [0002] High-precision control valve is a very important fluid medium control device, which is widely used in various occasions that require precise control of parameters such as flow. For some occasions, such as the propulsion system in the spacecraft, not only the valve is required to have high control accuracy, good sealing, low power consumption, but also requires its volume and mass to be small. In addition, the high temperature in the propulsion system Air jet is easy to produce harsh fluid medium environment, and also requires the valve to be able to withstand a certain temperature (the temperature can generally reach 200°C). [0003] As a new type of intelligent driv...

AI Technical Summary

Problems solved by technology

For the micro-manufacturing process type, it is mainly made of silicon materials through photolithography and etching. It can be made very small in volume and quality, but it has low pressure resistance, low flow rate, and low temperature resistance. It is suitable for use in the field of microfluidics such as biochips; for the traditional manufacturing process type, it is mainly made of metal materials through traditional manufacturing processes such as cutting and drilling, which can meet the requirements for pressure resistance, flow rate and temperature resistance. requirements, but its control accuracy is not high enough, and its volume and quality are generally large

In summary, simply using micro-manufacturing technology or traditional manufacturing technology to make valves can no longer meet the requirements for control accuracy, sealing, volume and quality, pressure resistance, flow rate and temperature resistance.

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