High-frequency valveless pump on the basis of intelligent material

Abstract

The invention belongs to a hydraulic pump manufacturing technology, and relates to the improvement on the working principle of a traditional hydraulic pump. The new type pump mainly comprises an intelligent material driving magnifying mechanism, a metal diaphragm vibration boosting mechanism, an oil absorption circuit and an oil drain non-return circuit. The intelligent material driving magnifying mechanism performs amplitude amplification on the high frequency vibration energy outputted by intelligent material through an arc type flexible hinge, and drives the metal diaphragm vibration boosting mechanism, the middle part of a circular metal diaphragm in forced vibration generates a ring-shaped transverse wave diffusing outwards, the upper and lower surfaces of the metal diaphragm and theupper and lower dish-shaped surfaces of a pump cavity form two groups of closed chambers moving outwards, the closed chambers forces oil continuously from a low pressure cavity to a high pressure cavity, thus realizing oil pumping. When a traditional reciprocating pump pumps oil in each vibration cycle, a hydraulic valve changes the direction of the oil circuits, resulting the bottleneck that working frequency can not be too high, if the structure is employed, the bottleneck can be avoided, the high frequency characteristic of the intelligent material can be fully applied to the manufacture field of hydraulic pumps.

Description

technical field [0001] The invention belongs to the hydraulic pump manufacturing technology and relates to the improvement of the traditional hydraulic pump principle. Background technique [0002] Hydraulic pumps are widely used in engineering machinery, hoisting and transportation, metallurgy, aerospace, ships, biology, medicine and other fields. With the emergence of smart materials, especially piezoelectric ceramics and giant magnetostrictive materials, and their performance gradually Improvement. In recent decades, many kinds of hydraulic pumps based on intelligent materials have been studied at home and abroad. At present, this hydraulic pump has certain applications in many fields, but due to the small flow rate of the existing pumps, its application is not widespread. . The reason is that the existing hydraulic pumps based on smart materials are all manufactured on the principle of reciprocating pumps. They use the expansion and contraction or vibration of smart mat...

AI Technical Summary

Problems solved by technology

The reversing valve generally has two implementation schemes, one of which is to use a one-way valve (passive valve) to limit the flow direction of oil. It can only reach 100 Hz, which makes the operating frequency of this pump only within 100 Hz; the other is to use active valves, mainly proportional valves or on-off valves driven by smart materials. It can work at a higher frequency, but due to certain processing difficulties and some other reasons, the current working frequency of the pump developed by this scheme is not too high

Smart materials are characterized by high energy density and high operating frequency (up to 10 kHz), but the compression stroke is small, and the material itself cannot take advantage of the high energy density at lower operating frequencies

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