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Piston rod sealing assembly for hot-air engine

A technology for sealing components and piston rods, which is used in the sealing of engines, hot gas variable capacity engine devices, engine components, etc., can solve problems such as easy oil leakage, poor reliability, and working fluid pollution, and achieve good results and prevent pollution. Effect

Active Publication Date: 2015-05-06
SHANGHAI MICROPOWERS
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a piston rod sealing assembly for a heat engine, which solves the problems that the current piston rod sealing assembly is prone to oil leakage, the working medium is easily polluted, and has poor reliability. Features of simplicity and high reliability

Method used

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  • Piston rod sealing assembly for hot-air engine

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Embodiment Construction

[0015] Such as figure 1 As shown, the piston rod sealing assembly for the heat engine consists of a cap seal 7 sleeved on the piston rod 1, a main sealing assembly, an auxiliary main sealing assembly and a gland 6. The main sealing assembly consists of a conical seat 11, The main seal 2, the main seal gland 3 and the spring 9. The auxiliary main seal assembly is arranged between the main seal assembly and the cap seal 7. The auxiliary main seal assembly consists of the auxiliary main seal 8, the auxiliary main seal gland 10 and the spring 9. The auxiliary main seal 8 is similar in structure to the main seal 2. It is a rod seal sleeved on the piston rod 1. The outer side has an upper and a lower conical boss, and the lower end of the boss abuts against On the corresponding conical boss of the spring seat 5, the upper conical surface of the boss is pressed by the corresponding conical boss of the auxiliary main sealing gland 10, and the upper end of the auxiliary main sealing gla...

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Abstract

The invention discloses a piston rod sealing assembly for a hot-air engine. The assembly comprises a cap type seal arranged on a piston rod in a sleeving mode and a main sealing assembly, wherein the main sealing assembly is composed of a conical base, a main seal, a main seal gland and a spring; an auxiliary sealing assembly is further arranged between the main sealing assembly and the cap type seal and is composed of an auxiliary main seal, an auxiliary main seal gland and a spring, the auxiliary main seal is a rod sealing piece arranged on the piston rod in a sleeving mode, an upper conical face boss and a lower conical face boss are arranged on the outer side of the auxiliary main seal, the lower end conical face of each auxiliary main seal boss abuts against a corresponding conical face boss of a spring base, the upper end conical face of each auxiliary main seal boss is pressed by a corresponding conical face boss of the auxiliary main seal gland, and the upper end of the auxiliary main seal gland is tightly pressed by the spring. The piston rod sealing assembly has the advantages of being compact in structure and good in sealing effect and is particularly suitable for the application occasion where a solar operated hot-air engine and the like need to run in a front-stand state or in an inverted state.

Description

Technical field [0001] The invention relates to the field of engines, in particular to a piston rod sealing device for a heat engine. Background technique [0002] A hot gas engine is an external combustion engine that heats the working fluid in a closed cycle by heat or heat source generated by external combustion. When the Stirling engine is working, the working fluid gas does work in the closed cycle inside the heat engine. In order to improve the performance and reliability of the engine, prevent leakage and contamination of the working fluid, improve the sealing effect of the working fluid system, and improve the sealing effect of the piston rod is particularly important. The Chinese invention patent with publication number CN200312345 discloses an oil-free oil-lubricated piston gas compressor piston rod oil-proof sealing structure. The sealing structure consists of a self-tightening cap seal and a rod seal. The rod seal is composed of The lower sealing seat, a rod seal wit...

Claims

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Application Information

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IPC IPC(8): F02G1/053
CPCF02G1/0535F02G2253/03
Inventor 朱辰元凌虹轩连
Owner SHANGHAI MICROPOWERS
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