Dual-rotor expander and using method thereof

Abstract

The invention discloses a dual-rotor expander. The dual-rotor expander comprises a cylinder body, two rotors with protruding blades and grooves are arranged in the cylinder body, the outer circumferential surfaces of the two rotors are tangent to each other, the blades and the grooves of the two rotors sequentially mesh with each other, the two rotors and the cylinder body form an expansion cavity, high-pressure fluid enters the expansion cavity from an inlet and then pushes the two rotor blades to rotate at a fixed speed ratio in opposite directions along respective rotating axes, and outputtorque does work outwards. The dual-rotor expander is simple in structure, easy to process, high in mechanical efficiency, high in effective volume rate, free of abrasion, long in service life and simple in maintenance.

Description

technical field [0001] The invention discloses a rotor type fluid mechanical device, which relates to the field of fluid machinery, in particular to an expander and fluid motor with high expansion efficiency, high effective volume ratio, easy processing, no wearing parts, long service life and low maintenance cost or pump. Background technique [0002] In recent years, with the development of my country's industry and people's living standards, more and more energy sources such as petroleum and coal are used, the greenhouse effect is becoming more and more serious, and the air quality is deteriorating. Energy conservation and emission reduction have become one of the national key tasks. There is a large amount of differential pressure energy in natural gas pipelines and urban natural gas pipeline networks. In heavy industrial enterprises such as chemical industry, steel, thermal power, and cement, there is a large amount of low-grade waste heat associated with the production...

AI Technical Summary

Problems solved by technology

Application No. 201510195251.4 In the patent document named "Rotor Expander" (hereinafter referred to as Document 1), an expander with male and female rotor meshing is introduced. This machine has the advantages of simple structure and no axial force. The protruding blades of the rotor and the grooves of the female rotor need to be meshed and sealed, which requires high machining accuracy and surface roughness of the blades and groove surfaces, and surface finishing has always been a difficult point in processing; in order to seal, the top of the male rotor protruding blades To install a spring air seal, the small and precise air seal is difficult to process, and the top of the air seal rubs against the groove of the female rotor and the cylinder wall during operation, which is easy to be damaged; the expansion chamber has no closed volume expansion process, and the expansion ratio cannot be adjusted. The utilization rate of internal energy is low, and the efficiency is low; moreover, only the male rotor in the cylinder can act externally, and the female rotor only has the function of sealing, so the effective volume ratio is low

[0005] The application number is 201811031829.2 in the patent document titled "Spherical Ball Expander" (hereinafter referred to as Document 2), which introduces an inner and outer spherical expander. High-pressure gas pushes the ball to move and then drives the sphere to rotate; the sphere of this kind of expander is difficult to process. In addition, the gas expands to push the ball first, and the ball pushes the sphere, so there is a large loss in the energy transfer process

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