CN201851313U - Air valve of reciprocating compressor - Google Patents

Abstract

The utility model discloses an air valve of a reciprocating compressor, which comprises a valve seat, an opening-closing element, an elastic element and a lift limiter, wherein the elastic element adopts a barrel-shaped helical spring, and the diameter of the rotating surfaces at both ends of the elastic element is smaller than that of the rotating surface in the middle of the elastic element. The provided elastic element adopts the barrel-shaped helical spring, the characteristic line of the spring is incremental, the rigidity of the spring is enhanced along with the increase of load, the force applied to the opening-closing element by the elastic element is favorably reduced when the air valve is fully closed, the natural vibration frequency is also a variable, and the anti-resonance capability is higher, so that the elastic element for the air valve adopts the barrel-shaped helical spring instead of the cylindrical helical spring, the service life and the security of the elastic element are favorably prolonged and enhanced, the law of motion of the air valve is further optimized, the reliability of the air valve is enhanced, and the energy consumption of the air valve is reduced.

Description

Air valve of a reciprocating compressor

technical field

The utility model relates to an air valve of a reciprocating compressor, in particular to an elastic element therein.

Background technique

Air valves of reciprocating compressors generally include valve seats, opening and closing elements, elastic elements and lift limiters. Elastic elements are the most important parts in air valves, and their performance directly affects the service life and energy loss of air valves. The characteristics of the elastic element are mainly determined by its structure. The ideal elastic element of the air valve should be rigid. For example, when the air valve is fully closed, the force of the elastic element acting on the opening and closing element should be small. The force acting on the opening and closing element should be high. However, in the prior art, the elastic element of the air valve of the reciprocating compressor generally adopts a cylindrical helical spring. The characteristic line of the spring is linear, and its stiffness does not change with the change of the load, which is not conducive to the optimization of the law of the air valve movement. It will also adversely affect the service life and energy loss of the gas valve.

Contents of the invention

The technical problem to be solved by the utility model is to provide an air valve of a reciprocating compressor, the stiffness of the elastic element in the air valve can increase as the load increases.

For this reason, the air valve of the reciprocating compressor provided by the utility model includes a valve seat, an opening and closing element, an elastic element, and a lift limiter. The elastic element is a convex coil spring, and the diameter of the rotating surface at both ends of the elastic element is It is smaller than the diameter of the middle rotating surface of the elastic element.

Since the elastic element provided by the utility model is a convex coil spring, the characteristic line of the spring is gradually increasing, and the stiffness of the spring increases with the increase of the load, which is beneficial to reduce the effect of the elastic element on the opening and closing of the air valve when the valve is fully closed. The force on the closing element, and its natural vibration frequency is also a variable value, and the anti-resonance ability is strong. Therefore, changing the elastic element of the air valve from a cylindrical coil spring to a convex thread spring is conducive to improving the service life of the elastic element and Safety, and then optimize the movement law of the air valve, improve the reliability of the air valve, and reduce the energy consumption of the air valve.

Description of drawings

The figure is a partial structural schematic diagram of the gas valve of the reciprocating compressor provided by the utility model.

Detailed ways

As shown in the figure, the gas valve of the reciprocating compressor provided by the utility model includes a valve seat 1, an opening and closing element 2, an elastic element 3, and a lift limiter 4. The elastic element 3 is a convex coil spring, and the elastic element 3 The diameters of the rotating surfaces at both ends of the elastic element 3 are smaller than the diameter of the rotating surface in the middle of the elastic element 3. The cross-sectional shape of the spring material is generally circular, and non-circular shapes can also be used as the cross-sectional shape of the spring material.

Claims (1)

1. the air valve of a reciprocal compressor, comprise valve seat (1), open and close element (2), elastic element (3), lift limiter (4), it is characterized in that: elastic element (3) is a barrel-shaped spring, and the diameter of the two ends surface of revolution of elastic element (3) is less than the diameter of surface of revolution in the middle of the elastic element.

Images