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A piezoelectric pump with a semi-active valve

A piezoelectric pump, semi-active technology, applied in the direction of pumps with flexible working elements, components of pumping devices for elastic fluids, pumps, etc. The effect of output flow, ensuring continuity and simple oil circuit

Active Publication Date: 2017-02-01
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The passive valve completely relies on the pressure of the hydraulic oil to control the opening and closing of the valve. It has a simple structure and is easy to manufacture, but the passive valve has great defects in the response frequency and the prevention of hydraulic oil backflow.
The active valve is made of piezoelectric material, and a specific voltage is given to it by the controller to realize the opening and closing of the valve. It improves the response frequency of the valve to a certain extent, but its limitation is that the production of this one-way valve is complicated. Requires very high precision controller control

Method used

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  • A piezoelectric pump with a semi-active valve
  • A piezoelectric pump with a semi-active valve
  • A piezoelectric pump with a semi-active valve

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] like figure 1 Shown: A piezoelectric pump with a semi-active valve is mainly composed of a pump body 1, a spring 2, a rigid element 3, an elastic diaphragm 4, a one-way valve at the oil inlet 5, an auxiliary oil circuit 6, and a one-way valve at the oil outlet Valve 7, oil outlet oil circuit 8, oil inlet oil circuit 9, circuit 10, power amplifier 11, signal controller 12, piezoelectric stack drivers A, B and chambers A, B.

[0021] The pump body 1 of the piezoelectric digital pump is made of stainless steel. Piezoelectric stack drivers A and B are placed inside. Piezoelectric stack drivers A and B are composed of multilayer piezoelectric ceramic sheets, electrodes, and insulators, which are formed as a whole by special process pressing and packaged in a metal shell. The whole actuator is fixedly connected with the pump body 1 . The stack driv...

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PUM

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Abstract

The invention discloses a piezoelectric pump with a novel semi-active valve. An auxiliary oil circuit is added into the traditional oil circuit to guide the discharged high pressure oil into the auxiliary oil circuit and jack an elastic film so as to achieve the auxiliary opening of an oil inlet one-way valve. According to the piezoelectric pump with the novel semi-active valve, the auxiliary opening of the one-way valve is achieved and the high pressure oil can be isolated from the low pressure oil so as to prevent the high pressure oil from entering a low pressure oil chamber due to the elastic film and the symmetrical double-pump structure design is adopted and accordingly the structure is simplified, the work is consistent, the working frequency is increased, and the flow of the hydraulic oil is increased.

Description

technical field [0001] The invention relates to a piezoelectric pump with a semi-active valve (hereinafter referred to as a piezoelectric pump with a semi-active valve). To be precise, it involves a high-pressure miniature digital hydraulic pump with semi-active valves driven by piezoelectric stack actuators. Background technique [0002] Piezoelectric pump is an important branch of micro fluid pump. Its working principle is to convert the mechanical energy generated by high-frequency vibration of piezoelectric actuator into highly controllable hydraulic energy. Compared with pumps with other structures, piezoelectric pumps have a simpler driving structure. The energy conversion part and the fluid drive part are the same original, and there is no transmission mechanism in the middle. At the same time, due to the characteristics of fast response and high precision of piezoelectric materials, piezoelectric pumps have the following characteristics: low power consumption, high ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B43/04F04B53/10
Inventor 王林翔李昕陈惟峰
Owner ZHEJIANG UNIV
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