CN221033019U - Cylinder cover sealing structure of ultrahigh-pressure diaphragm compressor of hydrogenation station - Google Patents
Cylinder cover sealing structure of ultrahigh-pressure diaphragm compressor of hydrogenation station Download PDFInfo
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- CN221033019U CN221033019U CN202322423108.9U CN202322423108U CN221033019U CN 221033019 U CN221033019 U CN 221033019U CN 202322423108 U CN202322423108 U CN 202322423108U CN 221033019 U CN221033019 U CN 221033019U
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- sealing
- diaphragm
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- shaped
- upper flange
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- 238000007789 sealing Methods 0.000 title claims abstract description 93
- 238000005984 hydrogenation reaction Methods 0.000 title claims abstract description 12
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 4
- 239000001257 hydrogen Substances 0.000 claims description 4
- 229910052739 hydrogen Inorganic materials 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 12
- 239000012528 membrane Substances 0.000 description 7
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 206010066054 Dysmorphism Diseases 0.000 description 2
- 230000004075 alteration Effects 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000010349 pulsation Effects 0.000 description 2
- 241000446313 Lamella Species 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000010725 compressor oil Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/32—Hydrogen storage
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- Diaphragms And Bellows (AREA)
Abstract
The application discloses a cylinder cover sealing structure of an ultrahigh-pressure diaphragm compressor of a hydrogenation station, and aims to solve the technical problem that a diaphragm is easily damaged due to overlarge local stress in the existing cylinder cover sealing structure of the diaphragm compressor. The sealing device comprises an upper flange, a lower flange and a diaphragm, wherein the upper flange and the lower flange are correspondingly and tightly attached and fastened through bolts, the diaphragm is clamped between the upper flange and the lower flange, two sealing grooves are respectively formed in the end surfaces of the upper flange and the lower flange, which are correspondingly contacted, and the sealing grooves at the upper flange and the sealing grooves at the lower flange are correspondingly and alternately arranged in the horizontal direction; the special-shaped sealing ring is embedded in the sealing groove and comprises an annular portion and a special-shaped portion, and the special-shaped portion of the special-shaped sealing ring is in contact with the bottom of the sealing groove. The sealing structure has the advantages of high sealing effect, long service life of the diaphragm and the like.
Description
Technical Field
The application relates to the technical field of hydrogenation equipment, in particular to a cylinder cover sealing structure of an ultrahigh pressure diaphragm compressor of a hydrogenation station.
Background
With the increasing demand of high hydrogen storage density of the hydrogenation station, higher technical requirements are put forward on the working pressure and temperature of the hydrogenation station compressor, so that the sealing performance, stability and other service performances of the compressor face higher challenges. Referring to fig. 1, a cylinder cover sealing structure of an existing diaphragm compressor adopts a bolt flange sealing mode, a diaphragm 2 is arranged between two flange plates 1, sealing surfaces where the two flange plates are contacted are respectively provided with a sealing groove 3, the sealing grooves are embedded into an O-shaped sealing ring 4, and sealing effect is realized by pre-tightening flange bolts.
The cross section of the O-shaped sealing ring is circular, the sealing principle is extrusion type sealing, elastic deformation occurs by means of the sealing ring, so that contact pressure is caused on a sealing contact surface, and leakage cannot occur when the contact pressure is larger than the internal pressure of a sealed medium.
However, in the process of implementing the technical solution in the embodiment of the present application, the present inventors have found that at least the following technical problems exist in the above technology: because the pressure in the ultrahigh pressure diaphragm compressor cavity is greater than 100 MPa, a larger bolt pretightening force is required to be applied to ensure the sealing effect, but larger additional local stress is generated by contact extrusion between the diaphragm and the sealing rubber ring, so that the diaphragm is further damaged in advance, and safety accidents such as oil-gas mixing and the like are easily caused.
The information disclosed in this background section is only for enhancement of understanding of the background of the disclosure and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is well known to a person skilled in the art.
Disclosure of Invention
In view of at least one of the above technical problems, the present disclosure provides a sealing structure for a cylinder cover of an ultrahigh pressure diaphragm compressor of a hydrogenation station, which aims to solve the technical problem that the sealing structure of the cylinder cover of the existing diaphragm compressor has excessive local stress and is easy to damage a diaphragm.
According to one aspect of the disclosure, a cylinder cover sealing structure of an ultrahigh pressure diaphragm compressor of a hydrogenation station is provided, which comprises an upper flange, a lower flange and a diaphragm, wherein the upper flange and the lower flange are correspondingly attached and fastened through bolts, the diaphragm is clamped between the upper flange and the lower flange, two sealing grooves are respectively formed in the end surfaces of the upper flange and the lower flange, which are correspondingly contacted, and the sealing grooves at the upper flange and the sealing grooves at the lower flange are correspondingly staggered in the horizontal direction; the special-shaped sealing ring is embedded in the sealing groove and comprises an annular portion and a special-shaped portion, and the special-shaped portion of the special-shaped sealing ring is in contact with the bottom of the sealing groove.
In some embodiments of the disclosure, the membrane comprises an air-side membrane and an oil-side membrane which are respectively in corresponding fitting contact with the two flanges, and a middle membrane is arranged between the air-side membrane and the oil-side membrane.
In some embodiments of the present disclosure, the seal groove width matches the profiled seal ring width.
In some embodiments of the disclosure, one end of the special-shaped portion of the special-shaped sealing ring is connected to an edge position of the annular portion, and the other end of the special-shaped portion is disposed at a certain distance from the annular portion.
In some embodiments of the present disclosure, the shaped portion is convexly curved corresponding to a side surface near the annular portion.
In some embodiments of the present disclosure, the height of the profiled seal ring in the non-externally-applied state is greater than the height of the seal groove.
One or more technical solutions provided in the embodiments of the present application at least have any one of the following technical effects or advantages:
1. The sealing structure is provided with two seals up and down respectively, and four sealing structures are arranged in a staggered way as a whole, and the fatigue life of the diaphragm can be prolonged while the sealing effect and the sealing reliability are improved due to the increase of the sealing quantity.
2. The structure of the special-shaped sealing ring has certain rebound characteristic, and when the diaphragm compressor bears long-time pulsation cyclic load so as to lead to the decay of the bolt pretightening force, the rebound characteristic of the special-shaped sealing ring can ensure that the system has good sealing performance for a long time.
Drawings
Fig. 1 is a schematic view of a cylinder head sealing structure of a conventional diaphragm compressor in the background of the application.
Fig. 2 is a schematic view of a sealing structure of a diaphragm compressor head according to an embodiment of the present application.
In the above figures, 1 is a flange plate, 11 is an upper flange, 12 is a lower flange, 2 is a diaphragm, 21 is an air-side diaphragm, 22 is an oil-side diaphragm, 23 is a middle-layer diaphragm, 3 is a seal groove, 4 is an O-ring, 5 is a special-shaped seal ring, 51 is an annular portion, and 52 is a special-shaped portion.
Detailed Description
In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. The terms "connected," "coupled," and "connected," as used herein, unless specifically indicated otherwise, are intended to encompass both direct and indirect connections (couplings).
The components and the like in the following examples are all commercially available products unless otherwise specified.
In order to better understand the technical scheme of the present application, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
The embodiment discloses a hydrogenation station superhigh pressure diaphragm compressor cylinder cap seal structure, see fig. 1, and it includes through upper flange 11 and lower flange 12, and the two flange intermediate lamella 2 that presss from both sides, in this embodiment, upper flange 11 is located diaphragm compressor's air chamber side, and lower flange 12 is located diaphragm compressor's oil pocket side, through the reciprocating motion of the membrane 2 that presss from both sides between two flanges, reaches the effect of compressor to hydrogen pressurization. Because the diaphragm needs to bear a certain degree of pressure when reciprocating, in order to keep the position of the diaphragm stable, bolts are used for applying a certain pretightening force to the two flanges so as to ensure the sealing of the cylinder cover.
Considering that under the current cylinder cap seal structure, the pretightning force that the bolt applyed can cause the diaphragm to produce great local stress with seal structure between, and then influence the life-span of diaphragm, aggravate the damage in advance of diaphragm, and under the long-time pulsation cyclic loading effect of diaphragm compressor, the bolt pretightning force is lax, leads to sealed inefficacy to a certain extent, causes the leakage. For this reason, in this embodiment, referring to fig. 2, in this example, two sealing grooves 3 are respectively formed on the end surfaces of the upper flange 11 and the lower flange 12 that can be in contact with each other, in order to ensure the sealing effect, the sealing grooves at the upper flange 11 and the sealing grooves at the lower flange 12 are correspondingly staggered in the horizontal direction, and sealing rings are respectively filled in each sealing groove 3, so that four sealing paths are formed in total.
In this embodiment, to ensure the stress of the diaphragm, three layers of diaphragms are provided, including an air-side diaphragm 21 in contact with the upper flange 11 and close to the compressor air chamber side, an oil-side diaphragm 22 in contact with the lower flange 12 and close to the compressor oil gun side, and a middle-layer diaphragm 23 interposed between the air-side diaphragm 21 and the oil-side diaphragm 22.
In addition, referring to fig. 2, in the present embodiment, the seal ring embedded in the seal groove 3 is a special-shaped seal ring 5, and the special-shaped seal ring 5 includes an annular portion 51 and a special-shaped portion 52, and the special-shaped portion 52 is disposed in contact with the bottom of the seal groove 3. The annular portion 51 and the special-shaped portion 52 are of an integral structure, and the cross section of the annular portion is rectangular, so that the corresponding end side of the annular portion 51 is effectively contacted with the diaphragm 2, the sealing effect is ensured, meanwhile, the contact stress between the sealing ring and the diaphragm is reduced through a large annular contact surface, and the service life of the diaphragm is prolonged. In this example, one end of the shaped portion 52 is connected to the edge of one side of the annular portion 51 and is disposed towards the other side of the annular portion 51, and a certain distance is formed between the other end of the shaped portion 52 and the annular portion 51, so that an included angle is formed between the shaped portion 52 and the annular portion 51, and after the sealing ring is subjected to an external force, a space for deformation of the sealing ring is provided by the included angle, and a sealing effect is ensured by a reaction elasticity generated after the deformation of the sealing ring.
In addition, in order to ensure that the sealing ring has a certain deformation amount, in this embodiment, the side surface of the special-shaped portion 52, which is close to the annular portion, is provided with a convex arc shape, so that the thickness of the special-shaped portion 52 is increased, and therefore, the elastic potential energy of the sealing ring can be increased, and a good sealing effect is achieved through the elastic deformation amount of the sealing ring. In addition, set up the width of seal groove 3 in this example and the width of dysmorphism sealing washer 5 unanimous for dysmorphism sealing washer 5 can gomphosis to in the seal groove 3 just, restrict the deformation of sealing washer along the groove width direction, make the deformation of sealing washer take place along the groove body direction of height of seal groove, from this, through the deformation of sealing washer, guarantee the moment of sealing washer and diaphragm closely laminating basis. In addition, the height of the special-shaped sealing ring 5 in the state of not receiving external force is larger than the height of the sealing groove 3, so that the corresponding end face of the annular part 51 of the special-shaped sealing ring 5 can be tightly attached to the diaphragm, and the sealing effect is ensured.
While certain preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (4)
1. The sealing structure of the cylinder cover of the ultrahigh pressure diaphragm compressor of the hydrogenation station is characterized by comprising an upper flange, a lower flange and a diaphragm, wherein the upper flange and the lower flange are correspondingly attached and fastened through bolts, the diaphragm is clamped between the upper flange and the lower flange, two sealing grooves are respectively formed in the end surfaces of the upper flange and the lower flange, which are correspondingly contacted, and the sealing grooves at the upper flange and the sealing grooves at the lower flange are correspondingly staggered in the horizontal direction; the special-shaped sealing ring comprises an annular part and a special-shaped part, and the special-shaped part is in contact with the bottom of the sealing groove; the side surface of the special-shaped part, which is correspondingly close to the annular part, is in a convex arc shape; the height of the special-shaped sealing ring in the state of not receiving external force is larger than that of the sealing groove.
2. The sealing structure of the cylinder cover of the ultrahigh pressure diaphragm compressor of the hydrogenation station according to claim 1, wherein the diaphragm comprises an air side diaphragm and an oil side diaphragm which are respectively correspondingly and in fit contact with the two flanges, and a middle diaphragm is arranged between the air side diaphragm and the oil side diaphragm.
3. The sealing structure of the cylinder cover of the ultrahigh pressure diaphragm compressor of the hydrogen adding station of claim 1, wherein the width of the sealing groove is matched with the width of the special-shaped sealing ring.
4. The sealing structure of the cylinder cover of the ultrahigh pressure diaphragm compressor of the hydrogen adding station according to claim 1, wherein one end of the special-shaped part of the special-shaped sealing ring is connected to the edge position of the annular part, and the other end of the special-shaped part is arranged at a certain distance from the annular part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322423108.9U CN221033019U (en) | 2023-09-07 | 2023-09-07 | Cylinder cover sealing structure of ultrahigh-pressure diaphragm compressor of hydrogenation station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322423108.9U CN221033019U (en) | 2023-09-07 | 2023-09-07 | Cylinder cover sealing structure of ultrahigh-pressure diaphragm compressor of hydrogenation station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221033019U true CN221033019U (en) | 2024-05-28 |
Family
ID=91166551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322423108.9U Active CN221033019U (en) | 2023-09-07 | 2023-09-07 | Cylinder cover sealing structure of ultrahigh-pressure diaphragm compressor of hydrogenation station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221033019U (en) |
-
2023
- 2023-09-07 CN CN202322423108.9U patent/CN221033019U/en active Active
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