Suction valve assembly for alternative compressor

Abstract

The present invention refers to a suction valve assembly for alternative compressors. Said suction valve assembly comprises at least two suction valves (3) independent from one another and disposed at one same blade (1), wherein each of said suction valves (3) comprises a functional edge (4) intended for a sole suction orifice (21) of the valve plate. Said suction valves (3) are separated from one another by at least one through slit (13).

Description

FIELD OF THE INVENTION [0001]The present invention refers to a suction valve assembly for alternative compressor, and, more specifically, to a suction valve assembly formed into a sole blade and particularly suitable for a compression chamber provided with at least two independent suction orifices.BACKGROUND OF THE INVENTION[0002]Alternative compressors comprising machines and / or devices capable of altering the pressure of a working fluid as well as pumping it are known from those skilled in the art. In this sense, and specifically speaking, alternative compressors are capable of altering the pressure of a working fluid by the controlled alteration of the volume of a compression chamber, which is usually defined by a cylindrical chamber suitable for receiving working fluid and a moving piston. Therefore, the compression chamber volume is alternatively altered (decreased and increased) in function of the displacement, in its interior, of the moving piston.[0003]It should be point out...

AI Technical Summary

Benefits of technology

The invention provides suction valves with independent actuation regions that work symmetrically, resulting in less mass and rigidity and better sealing of suction orifices.

Problems solved by technology

The concept in which a single valve acts on more than one orifice is undesirable from the point of view of sealing and dynamics.

In order that sealing is effective, the valve seat on the orifice edge should be plane; nevertheless, as the valve deforms within the orifice, such configuration is not effectively attained when 2 epicenters of deformation are present, leading to leakages.

As far as dynamics is concerned, a large body area is required for valve stability, thereby promoting an increase in mass and rigidity of the valve, rendering it slow.

However, configurations, as disclosed in said U.S. Pat. No. 2,725,183, do not make a better use of the solutions provided by multi-orifice.

Another visible drawback of this present configuration is the obstruction of the central discharge orifice by the center suction valve.

In addition to having all the above-mentioned drawbacks, it has been also observed that most of the presently existing suction valves comprise a dead volume effect (empty space where compressed gas at high pressure and temperature is retained and is no longer pumped to the system), this effect being highly undesirable, because after all it implicates significant losses in volumetric yield of the compressor, in addition to further comprising a negative aspect for the own functioning of those suction valves once this retained gas should be expanded into the compression chamber, thereby increasing the time at which the opening minimal pressure of the suction valve is obtained, resulting in a delay in the opening thereof.

Images