Constructive Disposition Introduced in Reciprocating Compressor Suction Valve

Abstract

Constructive disposition introduced in reciprocating compressor suction valve, whose moving parameters of elastic flexion area and, therefore, sealing end are mainly defined by specific geometries and dimensions of the own flexible segment of suction valve. Furthermore, the stiffness coefficient and natural frequency of flexible segment of suction valve are also defined from specific geometries and dimensions of the own flexible segment of suction valve, without being necessary to alter the material or thickness of metallic blade where the suction valve is defined.

Claims

1. Constructive disposition introduced in reciprocating compressor suction valve, comprising: a rigid blade having at least one semi-surrounding hollow slot which defines at least one flexible segment; said flexible segment comprising at least one sealing end, at least one elastic flexion area, at least one passing port, and at least one crimping area; aid flexible segment further comprising the following dimensions: H dimension, which comprises a general longitudinal extension of flexible segment; L dimension, which comprises a general latitudinal extension of flexible segment; dimension, in which C comprises the general longitudinal extension of passing port of flexible segment; R1 dimension, which comprises the upper internal surrounding radius of passing port of flexible segment; R2 dimension, which comprises the lower internal outline radius of passing port of flexible segment; B1 dimension, which comprises the latitudinal straight distance between the insertion point between the imaginary circle CR1 and the most outstanding portion of the superior internal outline radius of passing port of flexible segment and the external outline point of flexible segment closer to the interception point between the imaginary circle CR1 and the most outstanding portion of upper internal outline radius of passing port of flexible segment; B2 dimension, which comprises the latitudinal straight distance between the interception point between the imaginary circle CR2 and the most outstanding portion of lower internal outline radius of passing port of flexible segment and the external outline point of flexible segment closer to the interception point between the imaginary circle CR2 and the most outstanding portion of lower internal outline radius of passing port of flexible segment; said constructive disposal introduced on a reciprocating compressor suction valve being specially characterized by: the H dimension is larger than L dimension in a ratio which can vary between 1.31:1 to 1.9:1; the H dimension is larger than C dimension in a ratio which can vary between 1.61:1 to 2.5:1; the R2 dimension is larger than R1 dimension in a ratio which can vary between 1.1:1 to 1.7:1; and the B2 dimension is larger than B1 dimension in a ratio which can vary between 1.2:1 to 1.8:1.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present utility model will be detailed based on the figures related below, in which:

[0015] FIG. 1 shows a suction valve belonging to the current state of the art;

[0016] FIG. 2 shows the suction valve according to the present utility model; and

[0017] FIGS. 3A, 3B, 3C and 3D shows specific differentials of the suction valve according to the present utility model.

DETAILED DESCRIPTION OF THE UTILITY MODEL

[0018] As shown on FIG. 2, the new constructive arrangement introduced in suction valve of reciprocating compressor comprises a rigid foil 1, preferably made with a metallic alloy, in which it is observed a semi-outlying hollowed slot 2 that defines the flexible segment 3, which includes at least one sealing end 31, at least one elastic flexion area 32, at least one passing port 33, and at least one crimping area 34.

[0019] Said rigid foil 1 comprises still at least four passing ports 11 that, disposed in disconnection with the semi-outlying hollowed slot 2 and the flexible segment 3, define just mounting orientation guides for the fixing means (not shown) used to fix the reciprocating compressor head.

[0020] In general lines, the inventive character of the utility model in question is mainly focused on the dimensional relations of flexible segment 3. In this sense, and as shown on FIGS. 3A, 3B, 3C and 3D, are indicated the most relevant dimensions H, L, C, R1, R2, B1, B2 and where.

[0021] The H dimension comprises the general longitudinal length of the flexible segment 3, this is, the straight length measured between the distal points of the sealing end 31 and the crimping area 34 of flexible segment 3. The L dimension comprises the general latitudinal length of the flexible segment 3, this is, the straight length measured between the distal points of the sealing end 31 of flexible segment 3. The H and L dimensions, as well as the relation between them, is better shown on FIG. 3A.

[0022] The C dimension comprises the general longitudinal length of the passing port 33 of flexible segment 3, this is, the straight length measured between the oppose distal points of passing port 33 of flexible segment 3. The C dimension, including the relation of this with the H dimension is better shown on FIG. 3B.

[0023] The R1 dimension comprises the upper internal outline radius of passing port 33 of flexible segment 3, and the dimension R2 comprises the lower internal outline radius of passing port 33 of the flexible segment 3. Clearly, said passing port 33 of flexible segment 3 comprises an essentially oblong format. The dimensions R1 and R2, as well as the imaginary circles CR1 and CR2 respectively related to R1 and R2 radius are better shown on FIG. 3C.

[0024] The B1 dimension comprises the latitudinal straight distance between two points, to know: point I (insertion point between the imaginary circle CR1 and the most prominently portion of the upper internal outline radius of passing port 33 of flexible segment 3), and point II (external outline point of flexible segment 3 closer to point I). The dimension B2 comprises the latitudinal straight distance between two points, to know: point I (insertion point between the imaginary circle CR2 and the most prominently portion of the lower internal outline radius of passing port 33 of flexible segment 3), and point II (external outline point of flexible segment 3 closer to point I). The dimensions B1 and B2, as well as the relation between them, is better shown on FIG. 3D.

[0025] According to the present utility model, there are observed the following dimensional relations:

[0026] The H dimension is larger than the dimension L in a ratio that can range from 1.3:1 to 1.9:1. Preferably, the H dimension is larger than the L dimension in a ratio of 1.6:1.

[0027] The H dimension is larger than the dimension C in a ratio that can range from 1.6:1 to 2.5:1. Preferably, the H dimension is larger than the C dimension in a ratio of 2.1:1.

[0028] The R2 dimension is larger than the dimension R1 in a ratio that can range from 1.1:1 to 1.7:1. Preferably, the R2 dimension is larger than the R1 dimension in a ratio of 1.45:1.

[0029] The B2 dimension is larger than the dimension B1 in a ratio that can range from 1.2:1 to 1.8:1. Preferably, the B2 dimension is larger than the B1 dimension in a ratio of 1.5:1.

[0030] The ratio between the above mentioned dimensions enables the rigidity increase and of natural frequency of flexible segment 3 without being necessary any change on material or thickness of rigid foil 1.

[0031] This rigidity and natural frequency reached are totally favorable to reciprocating compressors since this two answer parameters of suction valve are essential for defining efficiency of compressor and the operation noise.

[0032] Additionally, it is noteworthy that the operation frequency point of flexible segment, according to the present utility model, is different from the natural frequency of internal resonant cavity of compressor (the internal cavity of compressor comprises the region composed by cooling gas located between the compressor body and the internal pieces of the compressor). The objective of changing the natural frequency of the valve is leaving the excitation region of natural frequency of compressor cavity, further to guarantee cooling capability parameters and energetic performance desired of the product.