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Pistons for Free Piston Engines

A piston engine and piston technology, applied in the direction of engine components, machines/engines, pistons, etc., can solve problems such as not being able to effectively realize the working state, and achieve the effect of preventing rotation

Inactive Publication Date: 2015-10-21
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the current free piston, the cylinder piston and the hydraulic cylinder piston are rigidly connected, which cannot effectively achieve an ideal working state.

Method used

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  • Pistons for Free Piston Engines
  • Pistons for Free Piston Engines
  • Pistons for Free Piston Engines

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] The present invention will be described in further detail below in conjunction with the embodiment given with accompanying drawing.

[0020] refer to Figures 1 to 8 , a piston for a free piston engine, comprising a cylinder piston 1, a hydraulic cylinder piston 10 and an anti-collision rod 11 screwed on the outer end of the hydraulic cylinder piston 10, between the cylinder piston 1 and the hydraulic cylinder piston 10 An eccentric connection is formed by an eccentric rod 5 and a flexible component 6 .

[0021] One end of the eccentric rod 5 is inserted and fixed on the boss 1.1 at the inner bottom of the cylinder piston 1 and connected with the cylinder piston 1 in a detachable eccentric center, and the other end is connected to the hydraulic cylinder piston 10 through the flexible assembly 6 It is a detachable coaxial fixed connection.

[0022] The eccentric rod 5 and the cylinder piston bottom boss 1.1 are provided with a corresponding installation orientation pla...

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PUM

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Abstract

The invention relates to a piston for a free piston engine. The piston comprises an air cylinder piston, a hydraulic cylinder piston and an anti-collision rod which is in screw connection to the outer end of the hydraulic cylinder piston. The air cylinder piston is connected with the hydraulic cylinder piston in a deviation axis mode through an eccentricity rod and a flexible assembly. One end of the eccentricity rod is inserted into and fixed on a boss at the bottom inside the air cylinder piston to be detachably connected with the air cylinder piston in a deviation axis mode, the other end of the eccentricity rod is detachably, coaxially and fixedly connected with the hydraulic cylinder piston through the flexible assembly. The piston can automatically adapt to the coaxiality deviation between an engine air cylinder and a hydraulic cylinder, and is prevented from rotating in the process of working.

Description

technical field [0001] The invention relates to a piston for a free-piston engine, in particular to a piston suitable for a two-stroke backflow scavenging free-piston engine. Background technique [0002] Compared with the conventional engine, the free piston engine has the biggest feature that there is no crank connecting rod mechanism, so its piston becomes the most important moving part. For the two-stroke backflow scavenging hydraulic free piston engine, one end of the piston is subjected to the force of gas, the other end is subjected to the force of hydraulic oil, and at the same time, it is also subject to gravity and frictional resistance, and the piston reciprocates under the combined force of the above forces. Theoretically, the axes of the cylinder of the engine and the hydraulic cylinder should be coaxial, but due to deviations in the processing and assembly process of the parts, the coaxiality cannot be strictly guaranteed, so the designed piston must be able to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02F3/00
Inventor 袁兆成马家义李振信李鹏
Owner JILIN UNIV