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Piston with steel top and aluminum skirt for 230SG type gas engine

A technology of piston and steel top, applied in the direction of piston, engine components, machine/engine, etc., can solve the problems of insufficient rigidity, low power, large linear expansion coefficient, etc., and achieve the effect of increasing power, increasing service life and increasing strength

Inactive Publication Date: 2010-12-29
TONGLING JINGHENG MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of existing 230SG gas engine pistons, such as easy overburning, low power, insufficient rigidity and large linear expansion coefficient, and provide a piston with steel top and aluminum skirt

Method used

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  • Piston with steel top and aluminum skirt for 230SG type gas engine
  • Piston with steel top and aluminum skirt for 230SG type gas engine

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Embodiment Construction

[0012] Steel top aluminum skirt piston of the present invention, as figure 1 As shown, it includes a steel piston top 2 and an aluminum skirt 3 coaxially connected with the piston top to form a piston. The piston top 2 is made of 42CrMoA alloy structure diamond, and the skirt body 3 is made of 4A11 aluminum. Cast aluminum, which limits the shaking range of the piston and reduces the impact on the cylinder. The upper end of the skirt body 3 is provided with a short column with a diameter smaller than that of the skirt body, and the connecting end of the piston top 2 and the skirt body 3 is provided with an inner hole matching the diameter of the short column, and the piston top realizes the sleeve connection through the cooperation of the inner hole and the short column , A sealing ring 4 is provided between the stub and the inner hole, and the piston top 2 and the skirt body 3 are connected as one by the cooperation of the bolt 5 and the nut 7. For the convenience of installat...

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Abstract

The invention discloses a piston with a steel top and an aluminum skirt for a 230SG type gas engine. The piston comprises a steel piston top [2] and an aluminum skirt body [3] which is coaxially connected with the piston top [2] to form the piston, the upper end of the skirt body [3] is provided with a short column with the diameter smaller than the diameter of the skirt body [3], a connection end of the piston top [2] and the skirt body [3] is provided with an inner bore matched with the short column in diameter, the sleeved connection of the piton top [2] is realized through the matching of the inner bore and the short column, a sealing ring [4] is arranged between the short column and the inner bore, the piston top [2] is integrated with the skirt body [3] into a whole through the matching of a bolt [5] and a nut [7], the upper part of the piston top [2] is provided with a groove [8] sinking inwards, and the external circular face of the piston top [2] is provided with two gas ring grooves [9] and an oil ring groove [10]. The invention has long service life without power reduction.

Description

technical field [0001] The invention relates to a piston, in particular to a piston with a steel piston top and an aluminum skirt body. Background technique [0002] The 230SG gas engine piston was originally an all-aluminum integral structure. The temperature at the top of the piston is high, and the top of the all-aluminum piston is easy to overheat and melt. Will accelerate the wearing and tearing of piston ring and piston ring groove, so the piston service life of this mechanism is short, and fuel consumption is big. The material of the all-aluminum piston is cast aluminum, and its large linear expansion coefficient increases the gap between the cylinder liner and the side of the piston, which will cause the piston to shake and impact the cylinder liner, resulting in vibration and noise of the engine. [0003] The 230SG gas engine requires a single-cylinder power of 180Kw, a speed of 1000rpm, an average effective pressure of 1.73Mpa, an explosion pressure of 14Mpa, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02F3/00F02F3/10F02F3/16
Inventor 章高升李杭兵
Owner TONGLING JINGHENG MACHINERY
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