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Travelling wave driven prezoelectric ceramic pump capable of realizing forward-reverse fluid flow

A piezoelectric ceramic pump and fluid flow technology, which is applied in the direction of pumps, machines/engines, liquid variable capacity machinery, etc., can solve problems such as single means, and achieve the effects of safe and reliable work, convenient operation, and increased reliability

Inactive Publication Date: 2007-09-05
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the flow control method of traditional piezoelectric pumps is relatively simple, basically relying on adjusting the input voltage of piezoelectric ceramics to achieve

Method used

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  • Travelling wave driven prezoelectric ceramic pump capable of realizing forward-reverse fluid flow
  • Travelling wave driven prezoelectric ceramic pump capable of realizing forward-reverse fluid flow
  • Travelling wave driven prezoelectric ceramic pump capable of realizing forward-reverse fluid flow

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0059] The present invention designs the second embodiment of the piezoelectric ceramic pump driven by traveling waves, as shown in Fig. 7-8. In this embodiment, the traveling-wave driven fluid piezoelectric pump is connected to the pump body 72 by a pump cover 71 with an inlet port 74 and an outlet port 75. The bottom end of the pump body 72 is bonded with a piezoelectric ceramic ring piece 73. A block 76 is disposed in the groove 721 . It is characterized in that: there are circumferentially distributed grooves 721 on the upper side of the outer circumference of the pump body 72 , the cross section of the groove is rectangular, the three ends of the rectangle rely on the pump body 72 , and the upper end faces rely on the pump cover 71 for sealing. On the lower side of the outer circumference of the pump body 72, a piezoelectric ceramic ring piece 73 is adhered. The inlet port 74 and the outlet port 75 are glued and fixed on the same side of the pump cover 71, and the inlet ...

Embodiment 3

[0063] The present invention has designed a third embodiment of the piezoelectric ceramic pump driven by traveling waves, as shown in Figures 9-10. In this embodiment, the traveling-wave driven fluid piezoelectric pump is connected to the pump body 92 by the pump cover 91 with the inlet port 94 and the outlet port 95, and the bottom end of the pump body 92 is bonded with a piezoelectric ceramic ring piece 93. A block 96 is disposed in the groove 921 . It is characterized in that: there are circumferentially distributed grooves 921 on the upper side of the outer circumference of the pump body 92 , the cross section of the groove is rectangular, the two end faces of the rectangle rely on the pump body 92 , and the other two end faces rely on the pump cover 91 for sealing. A piezoceramic ring sheet 93 is glued to the lower side of the outer circumference of the pump body 92 . The inlet port 94 and the outlet port 95 are glued and fixed on the same side of the pump cover 91, and ...

Embodiment 4

[0067] The present invention has designed a fourth embodiment of a piezoelectric ceramic pump driven by traveling waves, as shown in Figures 11-14. In this embodiment, the traveling-wave driven fluid piezoelectric pump is connected to the pump body 116 by the pump cover 111 with the inlet port 114 and the outlet port 115, and a piezoelectric ceramic ring is bonded to the upper and lower sides of the inner step of the pump body 116. The pieces 112 and 113 have a groove 1161 on the outside of the pump body 116, and a flow block 117 is arranged in the groove 1161. It is characterized in that: on the side of the pump body 116 on the outer circumference of the pump cover 111, there are circumferentially distributed grooves 1161. The cross section of the groove is rectangular, and the rectangular groove is sealed by the pump cover 111. The inlet port 114 and the outlet port 115 are glued and fixed on the same side of the pump cover 111, and the inlet port 114 and the outlet port 115...

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Abstract

The invention relates to flow pump technique field in precise machine which features that the circle edge of pump body is processed with slots on both upper and lower side, and with several through holes in slots; the slot is sealed by upper and lower pump cover forming a flow channel; upper and lower piezoelectric ceramic plate pasted respectively on the upper and lower side of the pump body, moreover the upper and lower pieces is one fourth wavelength different along the circle, generating a needed traveling wave fluctuate in upper and lower slots while working; flow inlet port and outlet port placed on the same or different sides of the ceramic pump, and block is just between the two port ensuring the flow enters from the inlet port and leaves from the outlet port. The flow direction is controlled by the phase difference of the two exterior power source while the flow amount, speed and back pressure with width, frequency and phase position. It is of low sealing requirement, high reliability, fine flow block performance, handily operation and the working frequency is above 10 KHz.

Description

technical field [0001] The invention belongs to the technical field of fluid pumps in precision machinery, and in particular relates to the specific structural design, manufacturing method and driving method of a novel piezoelectric ceramic pump driven by traveling waves. technical background [0002] In the background technology, most of the traditional piezoelectric pumps use the bending deformation of the low-order modes of piezoelectric ceramics, which leads to the change of the volume of the pump cavity, and squeezes the liquid in the cavity to form the flow of the liquid. Its working principle determines that there are relatively high requirements for design, assembly and use of piezoelectric pumps. For example, the pump cavity is required to be highly sealed to avoid air bubbles in the cavity. The existence of air bubbles will directly affect the pumping effect of the piezoelectric pump, and even easily cause the piezoelectric pump to fail to work normally. Before mo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B17/00
Inventor 褚祥诚袁松梅李龙土
Owner TSINGHUA UNIV