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

Abstract

The invention discloses a method for manufacturing a valve plate of a high-efficiency and low-noise piston compressor. The compressor includes a cylinder head assembly, wherein a crescent-shaped suction port is arranged on the valve plate, and the crescent-shaped suction port is a crescent-shaped suction port. through hole. The valve plate is a powder metallurgical part; the manufacturing process of the valve plate is: mixing powder; molding with a mold; high temperature sintering; shaping; inspection; steam treatment. With the above technical solution, the pressure loss is reduced, and the energy efficiency ratio of the compressor is improved; the airflow velocity at the air inlet becomes smaller, the opening of the valve plate becomes slower, and the displacement of the valve plate becomes smaller; at the same time, the lift of the valve plate is reduced, reducing the The impact of the plate on the limit plate and the valve seat reduces the noise of the valve plate from the source; in addition, the displacement of the valve plate is reduced, the stress on the waist of the valve plate is reduced, the area of ​​the dangerous stress area of ​​the valve plate is reduced, and the valve plate is reliable. Enhanced performance; improved energy efficiency ratio, reduced airflow noise and improved compressor reliability.

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...

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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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