RECIPROCATING COMPRESSOR CYLINDER COVER

Abstract

The present invention refers to a reciprocating compressor cylinder cover and, more particularly, to a cylinder cover provided with at least one discharge chamber comprising a compact construction concept, able to guarantee an application in reciprocating compressors of different capacities, with hermetic housings provided with different internal volumes.

Claims

1. Reciprocating compressor cylinder cover, comprising: at least a first expansion chamber (1) and at least a second expansion chamber (2) fluidly connected to each other by means of at least one communication duct (3); the first expansion chamber (1) being defined, at least partially, by the region (4) of the cover and the counter-parts of the compression cylinder; the second expansion chamber (2) being defined, at least partially, by the region (5) of the cover and the counter-parts of the discharge system; the reciprocating compressor cylinder cover being characterized in that: the first expansion chamber (1) comprises a closing interface (11) with the valve plate arranged at the end of the compression cylinder and the second expansion chamber (2) comprises a closing interface (21) with counter-parts of the discharge system; and the closing interface (11) of the first expansion chamber (1) and the closing interface (21) of the second expansion chamber (2) are facing the same face, and the regions (4) and (5) of the cylinder cover comprise at least one restriction between them, said restriction being designed to reduce resonances in the excitation frequencies of the reciprocating compressor.

2. Reciprocating compressor cylinder cover, according to claim 1, characterized in that an exhaust chamber is subdivided into two or more chambers interconnected by at least one communication duct.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is detailed based on the figures listed below, wherein:

[0017] FIG. 1 shows, in front perspective, the reciprocating compressor cylinder cover according to the invention at issue;

[0018] FIG. 2 illustrates, in posterior perspective, the reciprocating compressor cylinder cover according to the invention at issue;

[0019] FIG. 3 shows the reciprocating compressor cylinder cover according to the invention at issue, seen from the back;

[0020] FIG. 4 shows the reciprocating compressor cylinder cover according to the invention at issue, seen from the front; and

[0021] FIG. 5 illustrates the section A-A taken from FIG. 4.

[0022] FIG. 6 illustrates the exhaust chamber subdivided into two chambers interconnected by at least one communication duct.

[0023] FIG. 7 illustrates the exhaust chamber and the cylinder cover, in section, subdivided into two chambers interconnected by at least one communication duct.

DETAILED DESCRIPTION OF THE INVENTION

[0024] In accordance with the core objectives of the invention at issue, a reciprocating compressor cylinder cover is disclosed which comprises at least a first expansion chamber 1 and at least a second expansion chamber 2 fluidly connected to each other by means of at least one communication duct 3.

[0025] According to the invention at issue, a single first expansion chamber 1 and a single expansion chamber 2 are preferably provided, both of which are fluidly connected to each other via communication duct 3. Also, according to the invention at issue, both expansion chambers 1 and 2 as well as the communication duct 3 are made of an integral metallic body, with a tightness between the parts that allows the adjustment of the component stiffness.

[0026] Preferably, but not limited to, expansion chambers 1 and 2 comprise discharge expansion chambers, their shapes and geometries being defined according to specific projects and not necessarily related to the objectives and core of the invention at issue.

[0027] As shown in FIGS. 1, 2, 3 and 4, the first expansion chamber 1 is defined in region 4 of the compression cylinder (not shown), and the second expansion chamber 2 is defined, at least partially, in region 5 extended from region 4. It is to be noted that, as seen in the figures, region 4 defines a closure region and region 5 defines a perpendicular projection.

[0028] As with the compressor cylinder cover described in patent document U.S. Pat. No. 9,587,634, the first expansion chamber 1 is opened and comprises a closing interface 11 with the valve plate (not shown) arranged on the end of the compression cylinder (not shown). Thus, in order to be considered an expansion chamber itself, the first expansion chamber 1 must be attached to the valve (not shown) arranged on the end of the compression cylinder (not shown).

[0029] As also with the compressor cylinder cover described in patent document U.S. Pat. No. 9,587,634, the second expansion chamber 2 comprises a closing interface 21 with a closing structure (not shown). Thus, in order to be considered an expansion chamber itself, the second expansion chamber 2 needs to be attached to the closing structure (not shown).

[0030] In any case, and unlike the compressor cylinder cover described in patent document U.S. Pat. No. 9,587,634, the attachment interface 11 of the first expansion chamber 1 and the closing interface 21 of the second expansion chamber 2 are facing the same face.

[0031] This feature of the closing interface 11 of the first expansion chamber 1 and the closing interface 21 of the second expansion chamber 2 facing the same face is extremely innovative, and ends up: a) allowing the manufacture of the reciprocating cylinder cover through the manufacturing process of injection with simple and low cost tooling; b) allow the design of compact compressors; c) allow the adjustment of flexibility between the chambers, reducing the resonances in the compressor's excitation frequencies; d) allow the fixation of counter-parts of the discharge system using conventional methods of fixation in reciprocating compressors (screw and hydraulic joints); e) allow the second chamber to be subdivided into additional chambers keeping the set compact.

[0032] Finally, in a preferred embodiment, the cylinder cover of the present invention is capable of comprising an exhaust chamber that is preferably subdivided into two or more chambers interconnected by at least one communication duct.

[0033] It is important to note that the description above has the sole purpose of describing, in an exemplary manner, the particular embodiment of the utility model at issue. Therefore, it is clear that modifications, variations and constructive combinations of the elements that perform the same function in substantially the same way to achieve the same results, remain within the scope of protection defined by the attached claims.