CN114810559B - A curved diaphragm for diaphragm compressor - Google Patents
A curved diaphragm for diaphragm compressor Download PDFInfo
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- CN114810559B CN114810559B CN202210564348.8A CN202210564348A CN114810559B CN 114810559 B CN114810559 B CN 114810559B CN 202210564348 A CN202210564348 A CN 202210564348A CN 114810559 B CN114810559 B CN 114810559B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B45/00—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids
- F04B45/04—Pumps or pumping installations having flexible working members and specially adapted for elastic fluids having plate-like flexible members, e.g. diaphragms
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Abstract
The invention belongs to the technical field of diaphragm compressor equipment, and particularly relates to a curved diaphragm for a diaphragm compressor, which comprises a cylinder cover, a cylinder body, a cylinder sleeve and a cylinder sleeve support; the cylinder sleeve is connected with the cylinder sleeve support, the cylinder sleeve support is connected with the cylinder body, and the cylinder sleeve is arranged between the cylinder body and the cylinder sleeve support; the curved diaphragm is clamped between the cylinder cover and the cylinder body, a gas side is formed between the concave side of the curved diaphragm and the cylinder cover, and an oil side is formed between the convex side of the curved diaphragm and the cylinder body; the invention adopts the bent diaphragm formed by stamping, so that the maximum working stress of the bent diaphragm is kept below the allowable stress, the bent diaphragm can not be in fatigue failure, and the service life of the bent diaphragm is prolonged. The cylinder body and the cylinder cover membrane cavity rotate in a specific curve, a movement space is reserved for the convex side of the curved membrane close to the edge, the elastic deformation of the curved membrane is increased, the membrane cavity volume is increased, and the displacement of the diaphragm compressor is improved.
Description
Technical Field
The invention belongs to the technical field of diaphragm compressor equipment, and particularly relates to a curved diaphragm for a diaphragm compressor.
Background
The diaphragm compressor is a positive displacement compressor, and is widely applied to compression and transportation of various flammable and explosive gases, toxic and harmful gases, rare noble gases, corrosive gases and high-purity gases due to the structural specificity of the diaphragm compressor. The main working principle is that the motor drives the crankshaft connecting rod motion mechanism through the coupler to push the piston to reciprocate, the piston pushes hydraulic oil in the cylinder, the hydraulic oil uniformly acts on the diaphragm after passing through the oil distribution disc, and the diaphragm swings back and forth in the diaphragm cavity under the action of the hydraulic oil pushing force, so that the expansion, suction, compression and exhaust cycle reciprocating process is completed. At present, a diaphragm compressor generally adopts a plane circular thin plate diaphragm, the diaphragm is attached to an oil distribution disc and a cylinder cover for a period of time in each cycle, the deformation of the diaphragm in the up-down deflection can generate alternating stress circulation, and the stress generated by the larger deflection is larger. Therefore, in order to ensure the service life of the diaphragm, the deflection of the cylinder cover and the oil distribution disc is required not to be too large, the volume of the diaphragm cavity is also smaller, and the displacement of the diaphragm compressor is lower.
Disclosure of Invention
The invention aims to provide a curved diaphragm for a diaphragm compressor, which is used for solving the problems of smaller diaphragm cavity volume and lower working displacement of the existing diaphragm compressor.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a curved diaphragm for a diaphragm compressor comprises a cylinder cover 1, a cylinder body 3, a cylinder sleeve 4 and a cylinder sleeve support 5; the cylinder sleeve 4 is connected with the cylinder sleeve support 5, the cylinder sleeve support 5 is connected with the cylinder body 3, and the cylinder sleeve 4 is arranged between the cylinder body 3 and the cylinder sleeve support 5;
the curved diaphragm 2 is clamped between the cylinder cover 1 and the cylinder body 3, a gas side is formed between the concave side of the curved diaphragm 2 and the cylinder cover 1, and an oil side is formed between the convex side of the curved diaphragm 2 and the cylinder body 3;
the shape of the curved diaphragm 2 is formed by rotating a first curve, the curve rotates around a circle center at r=0, the rotation radius is R, the first curve is composed of a plurality of sections of curves, a straight line starts from the r=R, the first curve is connected with a first semicircle 31 through a first transition fillet 30, the first semicircle 31 is connected with the straight line through a second transition fillet 32 until the r=0, and a concave side and a convex side are formed near the edge;
the shape of the curved surface of the membrane cavity of the cylinder cover 1 is formed by rotating a second curve, and the edge clamping part is connected with the curve of the membrane cavity by a third transition round corner 33 and a second semicircle 34; the shape of the curved surface of the membrane cavity of the cylinder body 3 is formed by rotating a third curve, and the edge clamping part is connected with the curve of the membrane cavity by a fourth transition fillet 35 and a third semicircle 36.
An O-shaped ring seal 20 is arranged between the curved diaphragm 2 and the cylinder cover 1 and the cylinder body 3.
The curved diaphragm 2 is formed by stamping.
Compared with the prior art, the invention has the beneficial effects that:
the invention adopts the bent diaphragm formed by stamping, so that the maximum working stress of the bent diaphragm is kept below the allowable stress, the bent diaphragm can not be in fatigue failure, and the service life of the bent diaphragm is prolonged. The cylinder body and the cylinder cover membrane cavity rotate in a specific curve, a movement space is reserved for the convex side of the curved membrane close to the edge, the elastic deformation of the curved membrane is increased, the membrane cavity volume is increased, and the displacement of the diaphragm compressor is improved. The cylinder cover, the cylinder body and the curved diaphragm are sealed by adopting an O-shaped ring, so that the sealing effect is ensured, and the requirement of the hydrogen compressor of the hydrogen adding station on the sealing performance is met.
Drawings
FIG. 1 is a schematic view of a cylinder head assembly of a curved diaphragm for a diaphragm compressor in accordance with the present invention;
FIG. 2 is an enlarged detail view at A in FIG. 1;
fig. 3 is a cross-sectional view of the cylinder head 1;
fig. 4 is a sectional view of the cylinder 3;
fig. 5 is a cross-sectional view of the curved diaphragm 2;
fig. 6 is a deformation diagram of the curved diaphragm 2 during inspiration;
fig. 7 is a deformation diagram of the curved diaphragm 2 during the degassing process.
Wherein the reference numerals are as follows:
1. cylinder cover 2, curved diaphragm
3. Cylinder body 4, cylinder sleeve
5. Cylinder liner support 10 and exhaust valve mounting part
11. Intake valve mounting portion 20, "O" -shaped seal ring
30. First transition fillet 31, first semicircle
32. Second transition fillet 33, third transition fillet
34. Second semicircle 35, fourth transition fillet
36. Third semicircle
Detailed Description
The following describes the embodiments of the present invention further with reference to the drawings.
As shown in fig. 1 to 4, a curved diaphragm for a diaphragm compressor includes a cylinder head 1, a curved diaphragm 2, a cylinder body 3, a cylinder liner 4, and a liner support 5;
the curved diaphragm 2 is clamped between the cylinder head 1 and the cylinder block 3 by bolting, and an air side is formed between the concave side of the curved diaphragm 2 and the cylinder head 1, and an oil side is formed between the convex side of the curved diaphragm 2 and the cylinder block 3. The cylinder head 1 is provided with an intake valve mounting portion 11 and an exhaust valve mounting portion 10. The cylinder sleeve 4 is connected with the cylinder sleeve support 5 through bolts, the cylinder sleeve support 5 is connected with the cylinder body 3 through bolts, and the cylinder sleeve 4 is arranged between the cylinder body 3 and the cylinder sleeve support 5.
As shown in fig. 5, the shape of the curved diaphragm 2 is formed by rotating a first curve, which is composed of a plurality of curves, with r=0 as a center, and R as a radius of rotation, starting from r=r as a straight line, then, the first curve is connected with a first semicircle 31 through a first transition fillet 30, then, the first semicircle 31 is connected with the straight line through a second transition fillet 32 until r=0, and a concave side and a convex side are formed near the edge. The elastic deformation of the curved diaphragm 2 becomes larger, so that the deflection of the curved diaphragm 2 in the compression process is increased, the volume of the diaphragm cavity is increased, and the displacement of the diaphragm compressor is improved.
The curved diaphragm 2 is formed by stamping, and has light weight, good rigidity and high surface quality, and the service life of the curved diaphragm 2 is prolonged.
The curved surface shape of the membrane cavity of the cylinder cover 1 is formed by rotating a second curve, and the edge clamping position is connected with the curve of the membrane cavity by a third transition round corner 33 and a second semicircle 34. The shape of the curved surface of the membrane cavity of the cylinder body 3 is formed by rotating a third curve, the edge clamping position is connected with the curve of the membrane cavity by a fourth transition fillet 35 and a third semicircle 36, a movement space is reserved for the convex side of the curved membrane 2 close to the edge, the deflection of the curved membrane 2 is increased, the radial stress and the circumferential stress of the curved membrane 2 are reduced, the volume of the membrane cavity is increased, and the displacement of the diaphragm compressor is improved.
An O-shaped ring seal 20 is arranged between the curved diaphragm 2 and the cylinder cover 1 and between the curved diaphragm and the cylinder body 3, so that the sealing reliability is enhanced, and the requirement of the hydrogen press of the hydrogen adding station on the sealing performance is met.
The working process of the invention is as follows:
as shown in fig. 6, when in suction, the curved diaphragm 2 deforms and moves downwards, during the movement, the first transition fillet 30 near the edge clamping position is attached to the outer edge of the third semicircle 36 of the cylinder 3, and the second transition fillet 32 near the center of the diaphragm is elastically deformed and stretched until the second transition fillet is attached to the curved surface of the film cavity of the cylinder 3; as shown in fig. 7, during the exhaust, the curved diaphragm 2 deforms and moves upwards, and during the movement, the first transition fillet 30 near the edge clamping position is attached to the outer edge of the second semicircle 34 of the cylinder cover 1, and the second transition fillet 32 near the center of the diaphragm is elastically deformed and stretched until the second transition fillet is attached to the curved surface of the diaphragm cavity of the cylinder cover 1.
Claims (1)
1. A curved diaphragm for a diaphragm compressor comprises a cylinder cover (1), a cylinder body (3), a cylinder sleeve (4) and a cylinder sleeve support (5); the cylinder sleeve (4) is connected with the cylinder sleeve support (5), the cylinder sleeve support (5) is connected with the cylinder body (3), and the cylinder sleeve (4) is arranged between the cylinder body (3) and the cylinder sleeve support (5); the method is characterized in that:
the curved diaphragm (2) is clamped between the cylinder cover (1) and the cylinder body (3), an air side is formed between the concave side of the curved diaphragm (2) and the cylinder cover (1), and an oil side is formed between the convex side of the curved diaphragm (2) and the cylinder body (3);
the shape of the curved diaphragm (2) is formed by rotating a first curve, the curve rotates around a circle center at r=0, the rotation radius is R, the first curve is formed by a plurality of sections of curves, a section of straight line is formed from the position of r=R, the section of straight line is close to the edge of the curved diaphragm and is connected with a first semicircle (31) through a first transition fillet (30), then the first semicircle (31) is connected with another straight line through a second transition fillet (32) until the position of r=0, and a concave side and a convex side are formed at the position close to the edge of the curved diaphragm;
the shape of the curved surface of the film cavity of the cylinder cover (1) is formed by rotating a second curve, and the curved surface comprises an edge clamping part of the cylinder cover, the film cavity curve of the cylinder cover, a third transition fillet (33) and a second semicircle, wherein the edge clamping part of the cylinder cover is connected with the film cavity curve of the cylinder cover through the third transition fillet (33) and the second semicircle (34); the shape of the curved surface of the film cavity of the cylinder body (3) is formed by rotating a third curve, and the curved surface comprises an edge clamping part of the cylinder body, the film cavity curve of the cylinder body, a fourth transition round corner and a third semicircle, wherein the edge clamping part of the cylinder body is connected with the film cavity curve of the cylinder body through the fourth transition round corner (35) and the third semicircle (36);
during inspiration, the curved diaphragm (2) deforms and moves downwards, and in the movement process, a first transition fillet (30) close to the edge of the curved diaphragm is attached to the outer edge of a third semicircle (36) of the cylinder body (3), and a second transition fillet (32) close to the center of the diaphragm is elastically deformed and stretched until the transition fillet is attached to the curved surface of the film cavity of the cylinder body (3); during exhaust, the curved diaphragm (2) deforms and moves upwards, and in the moving process, a first transition round corner (30) close to the edge of the curved diaphragm is attached to the outer edge of a second semicircle (34) of the cylinder cover (1), and a second transition round corner (32) close to the center of the curved diaphragm is elastically deformed and stretched until the second transition round corner is attached to the curved surface of a film cavity of the cylinder cover (1);
an O-shaped ring seal (20) is arranged between the curved diaphragm (2) and the cylinder cover (1) and between the curved diaphragm and the cylinder body (3);
and (3) stamping and forming the curved diaphragm (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210564348.8A CN114810559B (en) | 2022-05-23 | 2022-05-23 | A curved diaphragm for diaphragm compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210564348.8A CN114810559B (en) | 2022-05-23 | 2022-05-23 | A curved diaphragm for diaphragm compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114810559A CN114810559A (en) | 2022-07-29 |
| CN114810559B true CN114810559B (en) | 2023-05-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210564348.8A Active CN114810559B (en) | 2022-05-23 | 2022-05-23 | A curved diaphragm for diaphragm compressor |
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| CN (1) | CN114810559B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115217747B (en) * | 2022-08-19 | 2024-04-30 | 隋斌 | Diaphragm compressor and cylinder body structure thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200958600Y (en) * | 2006-08-31 | 2007-10-10 | 上海大隆机器有限公司 | Rubber curved diaphragm |
| CN203516023U (en) * | 2013-04-03 | 2014-04-02 | 深圳市四海通塑胶制品有限公司 | Pneumatic diaphragm pump |
| CN204627939U (en) * | 2015-03-20 | 2015-09-09 | 江苏恒久机械有限公司 | The cylinder cap of diaphragm type compressor embeds cylinder body without oil distribution casing film header structure |
| CN106885010A (en) * | 2017-04-17 | 2017-06-23 | 上海阀门五厂有限公司 | The rigidly connected middle flange arrangement component of flange in a kind of achievable diaphragm valve |
| CN113153724B (en) * | 2021-04-15 | 2023-04-18 | 沈阳理工大学 | Diaphragm compressor diaphragm pulsation system fault diagnosis device based on industrial internet platform |
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| CN114810559A (en) | 2022-07-29 |
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