Diaphragm adjusting device of diaphragm compressor under low negative pressure air intake

The diaphragm adjustment device, which combines electromagnets and piezoelectric ceramics, solves the problem of diaphragm separation in diaphragm compressors under low negative pressure intake, improves volumetric efficiency, stabilizes equipment operation, and is suitable for various working conditions.

CN224064501UActive Publication Date: 2026-03-31SICHUAN DACHUAN HYDROGEN ENERGY TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202521019608.9
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-05-22
Publication Date
2026-03-31
Estimated Expiration
2035-05-22

AI Technical Summary

Technical Problem

Under low negative pressure intake conditions, the diaphragm of the existing diaphragm compressor cannot adhere effectively, resulting in a decrease in volumetric efficiency. Furthermore, when the oil chamber pressure drops to atmospheric pressure, it may cause hydraulic oil to precipitate bubbles, affecting the stability of equipment operation.

Method used

A diaphragm adjustment device combining electromagnets and piezoelectric ceramics is used to assist the diaphragm in bonding under low negative pressure conditions through electromagnetic force. The deformation state of the diaphragm is controlled by switching the electromagnet on and off, and the magnitude of the electromagnetic force is adjusted by a sliding rheostat to ensure that the diaphragm maintains effective bonding under different working conditions.

Benefits of technology

It improves the volumetric efficiency of the diaphragm compressor under low negative pressure intake conditions, avoids the problem of hydraulic oil bubble precipitation, and enhances the operational stability and intake volume of the equipment.

✦ Generated by Eureka AI based on patent content.
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Abstract

The utility model discloses a diaphragm adjusting device of a diaphragm compressor under low-negative-pressure air inlet. The diaphragm adjusting device comprises a piston assembly, a crosshead assembly, an air distribution disc and an oil distribution disc. The three metal diaphragms are arranged between the gas side diaphragm cavity and the oil side diaphragm cavity in an overlapped mode, and the middle diaphragm is provided with a guide groove to be communicated with the leakage detection opening; the electromagnet is arranged on the surface layer, close to the diaphragm side, of the oil distribution disc; the piezoelectric ceramics are respectively fixed in the machine body assembly and are close to an upper dead center and a lower dead center of the crosshead assembly; the springs are fixed on the two sides of the machine body assembly, are insulated from the crosshead assembly and are used for triggering the piezoelectric ceramics; the electromagnets are electrically connected with the piezoelectric ceramics respectively; the switch is attracted and controlled by the electromagnet to switch on and off of a circuit; the slide rheostat is connected in series with the electromagnet to adjust the adsorption force; the spring impacts the piezoelectric ceramic when the crosshead assembly moves to the upper stop point and the lower stop point, current is excited to enable the electromagnet to attract the switch, and then power-on and power-off of the electromagnet are controlled.
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