Reciprocating compressor valve set structure with rapidly-opened-closed air discharge valve plate

Abstract

The invention discloses a reciprocating compressor valve set structure with a rapidly-opened-closed air discharge valve plate. The reciprocating compressor valve set structure comprises a valve plate, a plate top is provided with a valve seat, an air discharge hole is formed in the valve seat, a lift limiting device is arranged on the valve seat, and the air discharge valve plate is arranged between the lift limiting device and the valve seat and provided with the fixed end pressed by the lift limiting device and the movable end covering the air discharge hole; a spring piece is arranged between the air discharge valve plate and the valve seat, the pre-tightening force of the spring piece is in the opening direction of the air discharge valve plate, the spring piece is also provided with the fixed end and the movable end, and the fixed end of the spring piece is fixed still relative to the valve plate; the rigidity of the air discharge valve plate is not smaller than 600 N*mm<2>. The air discharge valve plate has the higher rigidity and can be easily and rapidly closed; the elasticity of the spring piece is provided in an assisted mode when the valve plate is opened, and the valve plate can be rapidly opened in an assisted mode. The air discharge valve plate is long in service life, low in impact noise, rapid in response and capable of serving as a component part of a reciprocating compressor valve set.

Description

technical field [0001] The invention relates to the field of compressors, in particular to valve group structures in reciprocating compressors. Background technique [0002] In the compressor, a closed-loop cavity is actually formed through the opening and closing of the valve plate to realize on-off. The piston reciprocates between the two dead centers of the cylinder, thereby compressing the low-temperature gas passing into the cylinder. , converted to high-temperature gas output, the gas inlet and outlet, that is, corresponding to the "suction" and "exhaust" actions of the compressor. The valve group of the compressor includes a valve plate, an exhaust valve plate and a lift limiter, wherein the valve plate is provided with a suction hole and an exhaust hole, and the exhaust valve plate has a fixed end and a movable end, and the movable end Paste near the exhaust hole and cover the exhaust hole, and the lift limiter is pressed on the fixed end of the exhaust valve plate....

AI Technical Summary

Problems solved by technology

When the valve plate is opened, the gas pressure in the cylinder drops slightly. If the rebound force of the valve plate is too large at this time and is greater than the pressure difference on both sides of the valve plate, the valve plate will be forced to move in the opposite direction (moving in the direction of valve plate closing) , hinder the smooth exhaust, so that the pressure in the cylinder increases again, and the newly increased pressure makes the valve plate be lifted up again (moving in the direction of the valve plate opening), and the cycle repeats, eventually causing the valve plate to reciprocate with high frequency in a short period of time

The "tremor" of the valve slice, on the one hand, will cause the valve slice to open and close frequently, and the air pressure in the cylinder fluctuates frequently, resulting in fatigue damage to the valve slice; on the other hand, it will also greatly reduce the time section of the valve

This abnormal movement of the valve plate reduces the gas transmission coefficient and indicating efficiency of the compressor

[0006] It can be seen that no matter whether it is inclined to choose a valve plate with small stiffness or high stiffness, it is easy to cause various adverse consequences, and it is difficult to achieve a truly efficient rapid opening and closing of the exhaust valve plate

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