RU2511951C1 - Direct-flow valve of piston compressor - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: direct-flow valve of a piston compressor comprises a valve board in the form of a disc, in which in the perpendicular plane there are inlet and outlet channels and stop elements between them. In the disc there is a circular peripheral collar for its fixation in the compressor cover. The disc is made from an elastic heat resistant material. Inlet and outlet channels are made in the form of coaxial cylindrical holes. Each stop element is made in the form of two diametrically closed grips in the closed position, which are in the outlet channel and are cast as integral with the body of the disc in their base. Axes of channels are evenly arranged on concentric circumferences along the entire area of the disc. In the body of the disc there is a reinforcing metal plate protruding into the circular collar with holes that surround inlet channels.

EFFECT: reduced hydraulic resistance of a valve during gas flow, which results in reduced consumption of energy consumed by an electric engine of a piston compressor.

2 dwg

Description

The invention relates to reciprocating compressors for both general and special purposes, in particular to gas distribution bodies - valves of reciprocating compressors.

A direct-flow valve is known for reciprocating compressors (SU 954691 A1, class F16K 15/16, 01/29/1982) containing seats with alternating sealing and limiting surfaces, working plates with teeth located between the seats, and coupling rings.

A direct-flow valve for piston machines is also known (SU 463829 A1, class F16K 15/14, 03/15/1975), containing seats with a variable curvature profile, curved plates and coupling rings.

The disadvantage of these valve designs is the high hydraulic resistance during gas passage.

The closest in technical essence is the design of the direct-flow valve (RU 2264576 C2, class F16K 15/16, 11/20/2005), containing flat seats and adjacent elastic plates. The valve operates as follows. When the gas pressure on the gas channel side is greater than the gas pressure on the opposite side of the valve, the plate bends under the action of gas and opens a gap through which the gas passes. When the pressure difference across the valve becomes zero or changes sign, the plate sits on the seat, the gap closes, the gas flow stops.

The disadvantages of this valve design are also high hydraulic resistance during the passage of gas changing its direction, expressed in the presence of structural narrowing and obstructions in the design of the gap in the form of the rear wall of the seat, small cross-section and difficulty in manufacturing.

The objective of the invention is to remedy these disadvantages. The technical result of the invention is to reduce the hydraulic resistance during the passage of gas, because the gas flow does not change its direction, which leads to a decrease in the energy consumption consumed by the piston compressor electric motor.

The problem is solved, and the technical result is achieved by the fact that in a direct-flow valve of a reciprocating compressor containing a valve plate in the form of a disk in which inlet and outlet channels and locking elements between them are made in a perpendicular plane, and an annular peripheral collar is made in the disk for mounting it in the compressor cover, according to the invention, the disk is made of elastic heat-resistant material, the input and output channels are made in the form of coaxial cylindrical holes, and each locking element is in the form of two sponges that are substantially closed in the closed position and are located in the outlet channel and cast along with the body of the disk at its base, while the axis of the channels are uniformly arranged on concentric circles over the entire area of the disk, and a reinforcing metal plate with holes extending into the annular collar surrounding input channels.

The invention is illustrated in the drawing, where figure 1 shows a valve assembly in section; figure 2 is a top view of figure 1.

The direct-flow valve of the reciprocating compressor contains a valve plate in the form of a disk 1. In the disk 1, inlet and outlet channels 3 are made in the perpendicular plane for the passage of the compressible gas through the elastic locking elements 4 located between them. The disk 1 is made with an annular peripheral collar 5 for mounting it in the compressor cover (not shown). The disk 1 is made of elastic heat-resistant material. Input 2 and output 3 channels are made in the form of coaxial cylindrical holes. Each locking element 4 is made in the form of two jaws 6 diametrically closed in the closed position, located in the output channel 3 and cast at the same time with the body of the disk 1. The axis of the channels 2, 3 is evenly placed on concentric circles over the entire area of the disk 1. In order for the disk 1 to be securely fixed in the compressor cover and have the required stiffness, a reinforcing metal plate 7 with holes in the ring collar 5 with openings surrounding the inlet 2 channels.

The valve operates as follows.

Under the pressure of the piston (not shown), the compressible gas enters each inlet channel 2 and, under the action of a pressure exceeding the elasticity of the elastic locking element 4, expands the lips 6 of the elastic locking element 4 and then passes through the hole formed in the outlet 3 channel to the outlet. After the piston reaches top dead center and begins to move to bottom dead center, the valve comes to a closed state.

The proposed technical solution makes it possible:

- reduce the specific energy consumption consumed by the piston compressor electric motor;

- increase the throughput of the direct-flow valve;

- significantly simplify the manufacture of direct-flow valve. The claimed valve can be manufactured on standard equipment using well-known processes.

Claims (1)

A direct-flow valve of a reciprocating compressor containing a valve plate in the form of a disk in which inlet and outlet channels and locking elements are made in a perpendicular plane, and the disk has an annular peripheral collar for mounting it in the compressor cover, characterized in that the disk is made of elastic heat-resistant material, the input and output channels are made in the form of coaxial cylindrical holes, and each locking element is in the form of two jaws diametrically closed in the closed position located in the output channel and cast along with the body of the disk at its base, the axis of the channels are uniformly placed on concentric circles over the entire area of the disk, and in the body of the disk there is a reinforcing metal plate extending into the annular collar with holes surrounding the input channels.

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