Scroll expander for micro-organic rankine cycle

Abstract

The invention relates to a scroll expander for the micro-organic rankine cycle. A static scroll shell is fixedly and hermetically connected with a support body; a static scroll wrap and a kinetic scroll wrap are arranged in the static scroll shell, and the static scroll wrap and the kinetic scroll wrap are inserted mutually; the back part of the static scroll wrap is fixedly connected with the static scroll shell; the back part of the kinetic scroll wrap is connected with a cross-shaped sliding ring through a back chute in a matching manner, and the cross-shaped sliding ring is connected with two chutes in the support body through sliding keys in the matching manner to realize revolution translation motion of the scroll wraps; one end of a crankshaft is connected with the kinetic scroll wrap through a needle bearing, the middle part of the crankshaft is connected with a thrust bearing nested in a seal disc, and the other end of the crankshaft is arranged on a support bearing arranged on the support body; a crank pin at the upper end of the crankshaft is equipped with a fan-shaped balancing weight, and the balancing weight is used for balancing eccentric forces of the kinetic scroll wrap, the needle bearing and the crank pin; and the seal disc is fixedly arranged on the support body. The scroll expander disclosed by the invention is simple in structure and reasonable in design; parts can be easily processed and manufactured; and aerodynamic performance of the scroll expander is effectively improved by a tooth profile of each scroll wrap and the reasonable design of air vents.

Description

technical field [0001] The present invention relates to a scroll expander, in particular to a scroll expander in which an air inlet opening is not covered by moving scroll teeth. Background technique [0002] In the micro-organic rankine cycle (micro-organic rankine cycle) system, the expander as the core component needs to be able to meet the requirements of small flow rate, high expansion ratio, volume and moderate speed, and the scroll expander can better It meets the above requirements, and has been widely concerned and recognized in practical application and research. [0003] In the scroll expander, the gaseous working medium with a certain temperature and pressure enters the central air intake chamber formed by the movable and static scroll teeth through the air inlet, and the gaseous working medium expands to do work, pushing the movable scroll to revolve around the fixed scroll Translational motion drives the crankshaft to rotate and output shaft work. It can be u...

AI Technical Summary

Problems solved by technology

[0005] For example, the design of a single gas outlet in Chinese Patent Application Publication No. CN101713300A will increase the frictional resistance loss of the orbiting scroll during the discharge process of the expanded gas, reducing the efficiency and power of the scroll expander.

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