Improved triangular piston rotating type compression-expansion machine

Abstract

The invention relates to an improved triangular piston rotating type compression-expansion machine and belongs to the technical field of power machines. The improved triangular piston rotating type compression-expansion machine comprises a power gear and at least one single-cylinder unit, wherein the single-cylinder unit comprises a sleeve, and an outer rotor and an inner rotor, positioned in the sleeve, a cavity is arranged in the outer rotor, two projecting ribs of which the centers are symmetrical are arranged on the inner wall of the cavity, the cavity inner wall between the two projecting ribs is a concave inner wall, the inner rotor is positioned in the cavity, three projecting edges are arranged on the outer wall of the inner rotor, the side walls between every two adjacent edges are arc-shaped side walls, dovetail grooves are formed in the edges and the projecting ribs, and elastic rolling assemblies are arranged in the dovetail grooves. The elastic rolling assemblies are used for promoting the edges and the side walls to be in rolling contact, having small resistance and wear, with the cavity inner wall and the two projecting ribs on the cavity inner wall. Friction losses are reduced, the service life of the whole machine is prolonged, negative effects produced during processing, assembling and running due to materials, errors and cleanliness are compensated, the seal effect is great, processing difficulty and cost are reduced, and the conversion efficiency of the whole machine is improved.

Description

technical field [0001] The invention relates to an improved triangular piston rotary compression expander, which belongs to the technical field of power machinery that utilizes renewable new energy, is environmentally friendly, carbon-free and pollutant-free. Background technique [0002] The expander is a machine that uses the principle of outputting mechanical work when the compressed gas expands and depressurizes to reduce the temperature of the gas and even liquefy it to obtain energy. It is often used in cryogenic equipment. [0003] The Chinese patent document "Unit Combined Slider Piston Inner Rotor Engine" (application number 87102947.2) discloses that the unit combined slider piston inner rotor engine is a new design scheme for internal combustion engines. The cylinder (A1) line is drawn by two different radii Different circular arcs are tangentially connected to form an arc triangle; the profile line of the slider (A5) is an approximate ellipse created by the same ...

AI Technical Summary

Problems solved by technology

Because the cylinder piston is a sliding contact with semi-dry lubricating oil, rather than a rolling contact with little resistance and wear, it is not only laborious but also inevitably has many defects such as so-called "vibration marks" and poor sealing performance, and its service life will inevitably be greatly improved. However, due to the high operating temperature of the cylinder piston and the aerobic combustion, it will burn and consume a large amount of lubricating oil, so only semi-dry sliding contact lubrication can be used, and its sealing performance is poor, and the compression ratio and working The efficiency will be greatly reduced, and its service life will inevitably be greatly shortened.

[0005] One of the inventors of the present invention applied for a triangular piston rotary compression-expander (application number is 200920054727.2) on April 15, 2009. Low, due to the frictional contact between the inner rotor and the outer rotor, the cylinder piston is severely worn and easily damaged. It requires high machining accuracy and smoothness and good materials to meet the requirements. The friction loss is large and the sealing performance is poor, which increases the processing difficulty. , the processing cost is high, but the effect is not ideal. However, the reason why the existing triangular piston rotary engine cannot be widely used is mainly due to its serious defects such as "vibration lines" that are difficult to solve and poor sealing performance.

Images