Manufacturing method of high-efficiency low-noise piston compressor valve plate

Abstract

The invention discloses a manufacturing method of a high-efficiency low-noise piston compressor valve plate. A compressor comprises an air cylinder head assembly, wherein a crescent-shaped air suctionport is formed in the valve plate and is a crescent-shaped through hole; and the valve plate is a powder metallurgical part. The technological process of the valve plate manufacturing method comprises the steps of powder mixing, compression molding through a die, high temperature sintering, shaping, inspection and steam treatment. By adopting the above technical scheme, pressure losses are reduced, and the compressor energy efficiency ratio is increased; the airflow velocity at an air inlet is decreased, a valve block is opened in a slow-down mode, and valve block displacement is reduced; meanwhile, the valve block lift is reduced, impact to a limiting plate and a valve seat is reduced, and noise of the valve block is reduced from the source; in addition, valve block displacement is reduced, stress to the waist of the valve block is reduced, thus, the critical stress zone area of the valve block is decreased, and the reliability of the valve block is improved; and the energy efficiency ratio is increased, airflow noise is reduced, and the reliability of the compressor is improved.

Description

technical field [0001] The invention belongs to the technical field of refrigeration compressors, and relates to high-efficiency and low-noise piston compressors. More specifically, the present invention relates to a method of manufacturing the valve plate of the compressor. Background technique [0002] As a traditional piston compressor, in order to improve the energy efficiency ratio of the compressor, the friction power is mainly reduced by increasing the gas transmission coefficient, the cooling capacity, and the precision of the parts; the input power is reduced by improving the efficiency of the motor, so as to achieve the purpose of improving the energy efficiency ratio of the compressor. ;In order to reduce noise, multi-stage resistant mufflers are set from the suction and exhaust angles to reduce aerodynamic noise; the vibration transmission is weakened from the transmission path; the friction power is reduced by improving the precision of the parts, and the fricti...

AI Technical Summary

Problems solved by technology

[0003] like figure 1 As shown, as a traditional compressor valve plate, the area of ​​the air inlet of the suction hole is small, and the suction speed is high, the Mach number is increased, the pressure loss is large, and the displacement of the valve plate is also small under the condition of constant suction volume. Larger, which increases the pressure loss and the noise of the valve plate, so the traditional compressor valve group has the hidden danger of low energy efficiency and high noise

[0004] The Chinese patent document published on December 18, 2002, with the application number "02216107" and the name "Concave-Convex Valve Plate for Refrigerator Compression", discloses a valve plate for a piston compressor, and its technical solution is: the entire concave-convex valve The plate adopts the powder metallurgy method to form various holes and valve ports at one time, and the parallelism and flatness of the convex and concave are 0.05mm, the parallelism and flatness of the air inlet are 0.025mm, and the hole distance is controlled at 0.05mm. The mouth is concave 1.5mm, and the waist-shaped mouth is used to improve the cooling efficiency and the purpose of energy saving and electricity saving. The ultimate goal of the technical solution is to make the parts reach the shape and position tolerance of the valve plate seal through the metallurgical forming method; Improving the cooling efficiency is only a waist-shaped opening, and if the area of ​​the suction opening is not increased and the slope is designed along with the flow of the refrigerant, the cooling efficiency and other issues cannot be really effectively solved, and continuous design improvements must be carried out, and this patent does not Does not disclose any scheme to improve refrigeration efficiency, and cannot solve the problems existing in the prior art

The technical solution is: by opening oil passages on both sides of the conventional valve plate, the heat transfer between the valve plate and the cylinder head can be reduced, and the lubricating oil can take away the heat of the valve plate from the oil passages on both sides, so as to reduce the temperature in the cylinder and increase the temperature. Work efficiency, from the existing valve plate technology is to use lubricating oil to reduce the heating of the refrigerant, but can not reduce the noise from the way of noise generation

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