RU1834985C - Direct-flow self-acting valve - Google Patents

Abstract

Usage: in gas distribution bodies of reciprocating compressors. Summary of the invention: elastic plates are installed between seats with sealing and restrictive surfaces. On the sealing surfaces of the seats on the inlet side, inlet grooves are made in the direction of gas movement, between the edges on the outlet side there are outlet grooves. Slots are made coaxially with the output grooves in the plates. The saddles and plates are fastened with tightening rings. On the sealing surfaces of the seats, recesses are made with a height equal to the thickness of the plate, and the shape is congruent to the shape of the plate. The slots on the plates are made in the form of grooves open from the gas outlet side. 6 ill.

Description

The invention relates to a compressor structure, namely, to gas distribution bodies of reciprocating compressors - self-acting valves.

The purpose of the invention is to increase the efficiency of the valve by improving its tightness.

This goal is achieved by the fact that recesses are made on the sealing surfaces of the seats, with a height equal to the thickness of the plate, and the shape is congruent to the shape of the plate, while the slots on the plates are made in the form of grooves open from the gas outlet side.

Figure 1 shows a flow-through self-acting valve with a partial section; figure 2 - the working surface of the saddle; in Fig.Z - section aa in Fig.2; figure 4 is a saddle, section bB in figure 2; Fig. 5 is a fragment of a section through the saddle BB in Fig. 3; 6 is an elastic valve plate (for example, double-tongue type). The direction of flow through the valve is indicated by an arrow.

The flow-through self-acting valve (Fig. 1) contains seats 1 and elastic plates 2 connected on both sides by compression rings 3. Seat 1 (Fig. 2) has on the working surface of the cell (flow channels) 4, separated by jumpers 5, in a manner for example, two groups of channels. Groups of channels overlapped by single elements of the elastic plate, the so-called. tabs 6 (Fig. 6) separate specially made grooves 7 (Fig. 2, 4), which are additional side channels for the passage of flow in the open valve, and also serve to create additional force on the back of the elastic plate with the valve closed.

This shape of the saddle increases the flow area, but at the same time increases the perimeter of the gap along which the flow passes. An increase in the perimeter of the gap, however, results in a decrease in valve tightness when it is closed.

To increase the tightness of the valve, an entire corner elastic plate 6 is provided.

TO

ABOUT

about

Ј

h s

J

with

beat into the working surface of the seat 1 (Fig. 2), creating for the flow with the valve closed a kind of labyrinth instead of a slit, using the so-called. shoulders 8 (Figs. 3, 4, 5), which are formed both on the bridges of the flow channels 5 and on the bridges containing specially made grooves 7 from the outlet side of the flow. The depth of the labyrinth is equal to the thickness of the elastic plate, and the shape and its other dimensions are an exact copy of the elastic plate. In this case, a possible return flow with the valve closed through the grooves 7 will no longer be able to lift the tabs 6 of the plate 2, since instead of the slit a labyrinth with shoulders 8 has been created. The labyrinth is not an obstacle to the direct flow.

In addition, it is possible, with the same effective passage section of the valve, to reduce its diameter, since each plate is recessed to its thickness in the seat, which is very important for a loaded metal of the compressor cylinder.

0

Claims (1)

The claims A direct-flow self-acting valve, mainly for a piston compressor, comprising seats with sealing and restrictive surfaces, elastic plates installed between the seats, while on the sealing surfaces of the seats on the inlet side, the inlet grooves are made in the direction of gas movement, and between them on the side exit - output grooves, moreover, slots are made coaxially with the output grooves in the plates, and the seats and plates are fastened with tight rings, characterized in that, in order to increase the efficiency in operation, After improving the tightness, on the sealing surfaces of the seats, recesses were made with a height equal to the thickness of the plate, and the shape was congruent to the shape of the plate, while the cuts on the plates were made in the form of grooves open from the gas outlet side. 5 CSN wshshash S5K5SSS J WiVOOC AIi S FIG. 1 AJ B-N 5 / U UHT / / /  / r rl Figure 2 Aa FIG. 3 8 7 857 8 FIG. Ts