CN216157851U

CN216157851U - Small-clearance air suction and exhaust mechanism of diaphragm compressor

Info

Publication number: CN216157851U
Application number: CN202122154444.9U
Authority: CN
Inventors: 杨华英; 翁明祖; 谢宗杰
Original assignee: Fuzhou Xugu Technology Co ltd
Current assignee: Fuzhou Xugu Technology Co ltd
Priority date: 2021-09-07
Filing date: 2021-09-07
Publication date: 2022-04-01
Anticipated expiration: 2031-09-07

Abstract

The utility model relates to a small clearance suction and exhaust mechanism of a diaphragm compressor, which comprises: the diaphragm compressor comprises a suction valve connected with a suction groove on a first cylinder body of the diaphragm compressor and a discharge valve connected with a discharge groove on the first cylinder body of the diaphragm compressor, wherein the suction groove is provided with a suction hole assembly, and the discharge groove is provided with a discharge hole assembly; the air suction valve is matched with the air suction hole assembly, and the exhaust valve is matched with the exhaust hole assembly; bosses are arranged on one sides of the suction valve and the exhaust valve close to the first cylinder body; and a gap is reserved between the end surface of the boss and the first cylinder body. The utility model reduces the ineffective ventilation volume, and can effectively reduce the gas volume in the clearance after the exhaust is finished so as to increase the suction volume of the compressor, thereby improving the volumetric efficiency of the compressor.

Description

Small-clearance air suction and exhaust mechanism of diaphragm compressor

Technical Field

The utility model relates to the technical field of diaphragm corking machines, in particular to a small-clearance suction and exhaust mechanism of a diaphragm compressor.

Background

The diaphragm compressor is a special positive displacement compressor, and the working principle of the diaphragm compressor is as follows: the crank connecting rod mechanism drives the three layers of metal diaphragms to deform through hydraulic oil, so that the volume in the diaphragm cavity is periodically changed, and four working strokes of air suction, compression, air exhaust and expansion are realized. Diaphragm compressors can achieve compression at higher pressure ratios, and therefore their clearance is required to be as small as possible to achieve higher volumetric efficiency.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

In order to solve the above problems in the prior art, the present invention provides a small clearance suction and exhaust mechanism of a diaphragm compressor, which reduces the ineffective ventilation volume and can effectively reduce the gas volume in the clearance at the end of exhaust, so that the diaphragm compressor sucks more gas in the suction phase.

(II) technical scheme

In order to achieve the purpose, the utility model adopts the main technical scheme that:

a small clearance suction and exhaust mechanism of a diaphragm compressor, comprising: the diaphragm compressor comprises a suction valve connected with a suction groove on a first cylinder body of the diaphragm compressor and a discharge valve connected with a discharge groove on the first cylinder body of the diaphragm compressor, wherein the suction groove is provided with a suction hole assembly, and the discharge groove is provided with a discharge hole assembly; the air suction valve is matched with the air suction hole assembly, and the exhaust valve is matched with the exhaust hole assembly;

bosses are arranged on one sides of the suction valve and the exhaust valve close to the first cylinder body; and a gap is reserved between the end surface of the boss and the first cylinder body.

Furthermore, the air suction hole assembly is composed of a plurality of outer air suction holes distributed according to an annular array and a plurality of inner air suction holes distributed according to axial symmetry, and the plurality of inner air suction holes are positioned on the inner sides of the plurality of outer air suction holes.

Furthermore, the number of the outer air suction holes is sixteen, and the sixteen outer air suction holes form a ring shape; the number of the inner suction holes is four.

Further, the exhaust hole assembly comprises a plurality of first exhaust holes which are arranged by taking the horizontal line as a symmetry axis and a plurality of second exhaust holes which are arranged by taking the vertical line as a symmetry axis.

Furthermore, the plurality of first exhaust holes and the plurality of second exhaust holes are arranged in a staggered manner; the number of the first exhaust holes is eight, and the first exhaust holes are distributed according to two rows; the number of the second vent holes is four, and the central connecting lines of the four second vent holes form a rhombus.

Further, the gas channels of the suction valve and the exhaust valve are crescent-shaped.

Further, the boss is cylindrical or frustum-shaped.

Furthermore, the joints of the suction valve and the exhaust valve with the first cylinder body are respectively provided with an O-shaped sealing ring.

Furthermore, the edges of the air suction hole assembly, the air exhaust hole assembly and the air side film cavity which are communicated with each other are rounded transition.

(III) advantageous effects

The utility model has the beneficial effects that: the volume of gas in the exhaust end clearance can be effectively reduced by reducing the ineffective ventilation volume, so that the suction volume of the compressor is increased, and the volumetric efficiency of the compressor is improved.

Drawings

FIG. 1 is a schematic structural diagram of one embodiment of the present invention;

FIG. 2 is a schematic view of an embodiment of the suction valve installation of the present invention;

FIG. 3 is a schematic view of a suction hole assembly according to an embodiment of the present invention;

FIG. 4 is a schematic view of a vent assembly according to one embodiment of the present invention;

FIG. 5 is a schematic view of a gas channel according to one embodiment of the present invention.

Detailed Description

For the purpose of better explaining the present invention and to facilitate understanding, the present invention will be described in detail by way of specific embodiments with reference to the accompanying drawings.

A small clearance suction and discharge mechanism of a diaphragm compressor according to an embodiment of the present invention, as shown in fig. 1 to 5, includes: the air suction valve 2 is connected with an air suction groove 11 on a first cylinder body 1 of the diaphragm compressor, and the exhaust valve 3 is connected with an exhaust groove 12 on the first cylinder body 1 of the diaphragm compressor, wherein an air suction hole assembly 13 is arranged on the air suction groove 11, and an exhaust hole assembly 14 is arranged on the exhaust groove 12; the suction valve 2 is matched with a suction hole assembly 13, and the exhaust valve 3 is matched with an exhaust hole assembly 14, so that the flow resistance is reduced to the maximum extent and the clearance increased due to the mismatching of flow channels is reduced; the edges of the air suction hole assembly 13 and the air exhaust hole assembly 14, which are communicated with the air side film cavity, are both subjected to rounding treatment so as to reduce the stress concentration of the metal film and prolong the service life of the metal film.

In the present embodiment, the internal structures of the suction valve 2 and the discharge valve 3 are prior art, and will not be described in detail herein,

further, the suction hole assembly 13 is composed of a plurality of outer suction holes 131 distributed in an annular array and a plurality of inner suction holes 132 distributed in an axisymmetric manner, the plurality of inner suction holes 132 are located inside the plurality of outer suction holes 131, in this embodiment, the number of the outer suction holes 131 is sixteen, and the sixteen outer suction holes 131 form a ring shape; the number of the inner suction holes 132 is four.

Further, the exhaust hole assembly 14 includes a plurality of first exhaust holes 141 arranged with the horizontal line as the symmetry axis and a plurality of second exhaust holes 142 arranged with the vertical line as the symmetry axis, and the plurality of first exhaust holes 141 and the plurality of second exhaust holes 142 are arranged in a staggered manner; in this embodiment, the number of the first exhaust holes 141 is eight, and the first exhaust holes are distributed in two rows; the number of the second vent holes 142 is four, and the central connecting lines of the four second vent holes 142 form a rhombus; the suction hole assembly 13 and the exhaust hole assembly 14 are composed of a plurality of small air holes which are uniformly distributed in the circumferential direction circle by circle according to the aerodynamic characteristics, and the gas flow velocity of each hole is very close and has no obvious layering phenomenon, so that the gas channel is a low-pressure-loss gas channel, and the relative clearance volume in a diaphragm compressor die cavity with the same cavity volume is greatly reduced because the gas channel is not of a single-hole structure.

Further, the arrangement of the suction hole assembly 13 and the discharge hole assembly 14 may be uniform distribution of equal/unequal intervals one by one in the circumferential direction; the arrangement of the suction hole assembly 13 and the exhaust hole assembly 14 can also be that a plurality of small air holes are arranged in a kidney-round hole mode according to the aerodynamic characteristics.

Furthermore, the joints of the suction valve 2 and the exhaust valve 3 with the first cylinder 1 are respectively provided with an O-ring 4, so that a smaller clearance can be obtained compared with other sealing structures, such as a metal gasket sealing structure; the O-shaped ring seal without the extrusion gap can achieve the sealing pressure of 52MPa, is sealed relative to a metal gasket, has a simple structure and small clearance, can be repeatedly used, and does not need to be replaced every time during disassembly and assembly.

Specifically, the gas channel 5 of the suction valve 2 and the exhaust valve 3 are crescent-shaped, the flow area is maximized within a proper clearance range, and the gas channel 5 is matched with the suction hole assembly 13 or the exhaust hole assembly 14, and the flow area is maximized within a proper clearance range.

Specifically, bosses 6 are arranged on one sides, close to the first cylinder body 1, of the suction valve 2 and the exhaust valve 3, and the bosses 6 are cylindrical or frustum-shaped; a gap is reserved between the end face of the boss 6 and the first cylinder body 1, so that gas can flow through the gap at a constant speed and is communicated with a valve plate channel of the suction valve 2 or the exhaust valve 3, pressure loss caused by overlarge local flow speed is reduced, and the gas flow area consistent with that of the suction valve 2 or the exhaust valve 3 is kept.

The diaphragm compressor has the advantages that the compression medium is not contacted with oil due to the isolation effect of the metal diaphragm, and zero-pollution compression can be realized. Therefore, the diaphragm compressor can be widely used for compression in the fields of expensive media, high-purity media and high pressure. With the development of hydrogen energy in recent years, the market application of the diaphragm compressor in the field of hydrogen compression is continuously expanded.

The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.

Claims

1. A small clearance suction and exhaust mechanism of a diaphragm compressor, comprising: the diaphragm compressor comprises a suction valve (2) connected with a suction groove (11) on a first cylinder body (1) of the diaphragm compressor and a discharge valve (3) connected with a discharge groove (12) on the first cylinder body (1) of the diaphragm compressor, wherein a suction hole assembly (13) is arranged on the suction groove (11), and a discharge hole assembly (14) is arranged on the discharge groove (12); the air suction valve (2) is matched with the air suction hole assembly (13), and the exhaust valve (3) is matched with the exhaust hole assembly (14);

bosses (6) are arranged on one sides of the suction valve (2) and the exhaust valve (3) close to the first cylinder body (1); a gap is reserved between the end face of the boss (6) and the first cylinder body (1).

2. A small clearance suction and discharge mechanism of a diaphragm compressor as set forth in claim 1, wherein: the air suction hole assembly (13) is composed of a plurality of outer air suction holes (131) distributed according to an annular array and a plurality of inner air suction holes (132) distributed according to axial symmetry, and the plurality of inner air suction holes (132) are positioned on the inner sides of the plurality of outer air suction holes (131).

3. A small clearance suction and discharge mechanism of a diaphragm compressor as set forth in claim 2, wherein: the number of the outer air suction holes (131) is sixteen, and the sixteen outer air suction holes (131) form a ring shape; the number of the inner suction holes (132) is four.

4. A small clearance suction and discharge mechanism of a diaphragm compressor as set forth in claim 1, wherein: the exhaust hole assembly (14) comprises a plurality of first exhaust holes (141) which are distributed by taking a horizontal line as a symmetry axis and a plurality of second exhaust holes (142) which are distributed by taking a vertical line as a symmetry axis.

5. A small clearance suction and discharge mechanism of a diaphragm compressor as set forth in claim 4, wherein: the plurality of first exhaust holes (141) and the plurality of second exhaust holes (142) are arranged in a staggered manner; the number of the first exhaust holes (141) is eight, and the first exhaust holes are distributed according to two rows; the number of the second vent holes (142) is four, and the central connecting lines of the four second vent holes (142) form a rhombus.

6. A small clearance suction and discharge mechanism of a diaphragm compressor as set forth in claim 1, wherein: and the gas channels (5) of the suction valve (2) and the exhaust valve (3) are crescent.

7. A small clearance suction and discharge mechanism of a diaphragm compressor as set forth in claim 1, wherein: the boss (6) is cylindrical or frustum-shaped.

8. A small clearance suction and discharge mechanism of a diaphragm compressor as set forth in claim 1, wherein: and O-shaped sealing rings (4) are respectively arranged at the joints of the air suction valve (2) and the air exhaust valve (3) and the first cylinder body (1).

9. A small clearance suction and discharge mechanism of a diaphragm compressor as set forth in claim 1, wherein: the edges of the air suction hole assembly (13) and the air exhaust hole assembly (14) which are communicated with the air side film cavity are rounded transition.