CN215567884U - Sealing ring for hydrogen compressor - Google Patents
Sealing ring for hydrogen compressor Download PDFInfo
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- CN215567884U CN215567884U CN202121421506.1U CN202121421506U CN215567884U CN 215567884 U CN215567884 U CN 215567884U CN 202121421506 U CN202121421506 U CN 202121421506U CN 215567884 U CN215567884 U CN 215567884U
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- ring
- annular
- polytetrafluoroethylene
- lip
- annular sleeve
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Abstract
The utility model discloses a sealing ring for a hydrogen compressor, which comprises an elastic ring with a V-shaped section and a polytetrafluoroethylene annular sleeve wrapping the elastic ring, wherein an annular cavity with the same direction as the opening direction of the elastic ring is formed in the upper side surface of the polytetrafluoroethylene annular sleeve, and the annular cavity divides the upper part of the polytetrafluoroethylene annular sleeve into an inner annular lip and an outer annular lip with V-shaped sections; the bottom of the elastic ring is distributed at the lower part of the polytetrafluoroethylene annular sleeve, and two free ends of the elastic ring, which are distributed in a V shape, respectively extend to positions corresponding to the inner ring lip and the outer ring lip. The V-shaped elastic ring is used as an elastic support to press the lip to be attached to the inner wall of the cylinder body of the compression cylinder, so that a primary sealing effect is achieved, and then the ring cavity is used for containing hydrogen to be compressed, so that the polytetrafluoroethylene ring sleeve generates slight expansion under the action of high-pressure gas, the lip is tightly attached to the inner wall of the cylinder body, and effective sealing is achieved.
Description
Technical Field
The utility model relates to the technical field of sealing of hydrogen compressors, in particular to a sealing ring for a hydrogen compressor.
Background
With the development of carbon neutralization concept, the national environmental protection attention is increasing, and carbon emission control is becoming a hot topic in the current discussion. The hydrogen fuel cell is a device for converting chemical energy of hydrogen and oxygen into electric energy through electrode reaction, and the discharged waste only contains water and heat, and is considered as an energy source with the most development prospect at present because no carbon is discharged. Among them, the hydrogen compressor plays an important role in a hydrogen fuel cell system, and belongs to a key part. Different from the traditional industrial air compressor, the hydrogen compressor has the characteristics of high reliability, long service life, no oil in exhaust, low noise, light weight, miniaturization, low cost, high response speed and the like, and the domestic research on the air compressor is started later, the product has poor reliability and unstable performance, and the air compressor is still in the research and development stage and the small-batch trial production stage at present.
And if the characteristics are required to be met, the sealing ring manufactured by the conventional structure and the common material is easily extruded from the gap of the mounting groove of the sealing ring under the oil-free lubrication high-temperature high-pressure dynamic sealing condition, and the root part of the sealing ring is deformed or even damaged after extrusion, so that the sealing failure is caused. Therefore, at the present stage, a plurality of multistage series-connected sealing rings are adopted for the sealing ring of the hydrogen compressor to realize one-position sealing, the temporary solution is not treated, the cost is not reduced, the service life is extremely short, and the follow-up maintenance and replacement are complex and the cost is high.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is desirable to provide a seal ring for a hydrogen compressor, which can be tightly attached to a mounting contact portion to achieve effective sealing at one side.
The utility model is realized by the following technical scheme:
a sealing ring for a hydrogen compressor comprises an elastic ring with a V-shaped section and a polytetrafluoroethylene annular sleeve wrapping the elastic ring, wherein an annular cavity in the same direction as the opening direction of the elastic ring is formed in the upper side surface of the polytetrafluoroethylene annular sleeve, and the annular cavity divides the upper part of the polytetrafluoroethylene annular sleeve into an inner annular lip and an outer annular lip which are V-shaped in section; the bottom of the elastic ring is distributed at the lower part of the polytetrafluoroethylene annular sleeve, and two free ends of the elastic ring which are distributed in a V shape respectively extend to positions corresponding to the inner ring lip and the outer ring lip.
In one embodiment, the cross-section of the lower portion of the ptfe annular sleeve is rectangular, and the upper surfaces of the inner and outer annular lips are flush.
In one embodiment, the inner ring lip is positioned on one side of the inner ring surface of the polytetrafluoroethylene annular sleeve and is parallel to the inner ring surface of the lower part of the polytetrafluoroethylene annular sleeve.
In one embodiment, the part of the inner ring lip, which is parallel to the inner ring surface of the lower part of the polytetrafluoroethylene annular sleeve, is a fixed contact surface, and one side of the outer ring lip, which is positioned on the outer ring surface of the polytetrafluoroethylene annular sleeve, is a sliding contact surface; at least one annular groove for anti-skid positioning of the polytetrafluoroethylene annular sleeve is formed in the fixed contact surface.
In one embodiment, the outer annular lip is positioned on one side of the outer annular surface of the polytetrafluoroethylene annular sleeve and is parallel to the outer annular surface of the lower portion of the polytetrafluoroethylene annular sleeve.
In one embodiment, the part of the outer ring lip, which is parallel to the outer ring surface of the lower part of the polytetrafluoroethylene annular sleeve, is a fixed contact surface, and one side of the inner ring lip, which is positioned on the inner ring surface of the polytetrafluoroethylene annular sleeve, is a sliding contact surface; at least one annular groove for anti-skid positioning of the polytetrafluoroethylene annular sleeve is formed in the fixed contact surface.
In one embodiment, a first blocking edge is arranged on one side, close to the outer annular surface of the polytetrafluoroethylene annular sleeve, of the inner annular lip, and a second blocking edge is arranged on one side, close to the inner annular surface of the polytetrafluoroethylene annular sleeve, of the outer annular lip; the elastic ring is arranged in the ring cavity, and two free ends distributed in a V shape are respectively abutted with the lower side surface of the first blocking edge and the lower side surface of the second blocking edge.
Compared with the prior art, the technical scheme of the utility model at least has the following advantages and beneficial effects:
the V-shaped elastic ring is used as an elastic support to press the lip to be attached to the inner wall of the cylinder body of the compression cylinder, so that a primary sealing effect is achieved, and then the ring cavity is used for containing hydrogen to be compressed, so that the polytetrafluoroethylene ring sleeve generates slight expansion under the action of high-pressure gas, the lip is tightly attached to the inner wall of the cylinder body, and effective sealing is achieved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a seal ring for a hydrogen compressor according to an embodiment of the present invention;
fig. 2 is a schematic view of an internal structure of a seal ring for a hydrogen compressor according to an embodiment of the present invention;
fig. 3 is a schematic view of an internal structure of another seal ring for a hydrogen compressor according to an embodiment of the present invention;
fig. 4 is a schematic view of a seal ring for a hydrogen compressor according to an embodiment of the present invention mounted on the outer periphery of a piston;
fig. 5 is a schematic view illustrating an installation of a seal ring for a hydrogen compressor on an inner wall of a cylinder body according to an embodiment of the present invention.
Icon: 1-elastic ring, 2-polytetrafluoroethylene annular sleeve, 21-annular cavity, 22-inner annular lip, 221-first retaining edge, 23-outer annular lip, 231-second retaining edge, 24-inner annular surface, 25-outer annular surface, 26-fixed contact surface, 261-annular groove, 100-sealing ring, 200-cylinder, 300-piston and 400-piston rod.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, a seal ring for a hydrogen compressor will be described more clearly and completely with reference to the accompanying drawings in the embodiments of the present invention. A preferred embodiment of a seal ring for a hydrogen compressor is shown in the drawings, however, a seal ring for a hydrogen compressor may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. The terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like, when used in reference to an orientation or positional relationship as indicated in the figures, or as would normally be placed in use of the utility model, are used solely to facilitate the description and simplicity of illustration, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be considered as limiting.
In the description of the present invention, it should be further noted that the terms "disposed," "mounted," "connected," and "connected" used herein should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, 2 and 4, an embodiment of the present invention provides a seal ring for a hydrogen compressor, including an elastic ring 1 having a V-shaped cross section and a polytetrafluoroethylene annular sleeve 2 for covering the elastic ring 1, where the elastic ring 1 may be a V-shaped spring sheet annularly connected into an annular structure, or may be an annular structure having a V-shaped cross section formed by bending an annular metal sheet at the middle part, the bottom of the elastic ring 1 is disposed at the lower part of the polytetrafluoroethylene annular sleeve 2, and two free ends of the elastic ring 1 disposed in a V-shape extend to positions corresponding to an inner ring lip 22 and an outer ring lip 23 respectively; as shown in fig. 2, in the present embodiment, the polytetrafluoroethylene annular sleeve 2 completely covers the elastic ring 1, and the elastic ring 1 is exposed to the outside without contact, so that the elastic function is realized inside the polytetrafluoroethylene annular sleeve 2; the upper side surface of the polytetrafluoroethylene annular sleeve 2 is provided with an annular cavity 21 which has the same opening direction as the elastic ring 1, the annular cavity 21 divides the upper part of the polytetrafluoroethylene annular sleeve 2 into an inner annular lip 22 and an outer annular lip 23 with V-shaped sections, at the moment, the sealing ring 100 is arranged in a gap of a sealing ring mounting groove on the outer periphery of the piston 300 or the inner periphery of the cylinder body 200, and because the annular cavity 21 exists between the inner annular lip 22 and the outer annular lip 23 as a movable buffer space, the part of the polytetrafluoroethylene annular sleeve 2 which is in sliding contact with the outside is not easy to extrude but is better attached to the inner wall of the cylinder body 200; the inner ring lip 22 and the outer ring lip 23 of the polytetrafluoroethylene annular sleeve 2 are respectively elastically deformed by two free ends of the elastic ring 1 which are distributed in a V shape, so that the lip of the polytetrafluoroethylene annular sleeve 2 which is used for being in sliding contact with the outside is tightly attached to the inner wall of the cylinder body 200, and preliminary sealing is realized; then utilize the ring chamber 21 to hold and wait to compress hydrogen, the high pressure that the hydrogen compression produced makes polytetrafluoroethylene annular cover 2 produce slight expansion to make outer loop lip 23 and cylinder body inner wall closely laminate, realize effective sealedly.
In other embodiments, as shown in fig. 3, the elastic ring 1 may also be disposed in the ring cavity 21, and then the first blocking edge 221 is disposed on one side of the inner ring lip 22 close to the outer ring surface 25 of the ptfe ring 2, and the second blocking edge 231 is disposed on one side of the outer ring lip 23 close to the inner ring surface 24 of the ptfe ring 2, so that two free ends of the elastic ring 1 distributed in a V shape are respectively clamped by the first blocking edge 221 and the second blocking edge 231, thereby completing the installation of the elastic ring 1 in the ptfe ring 2, and also achieving the purpose of the above-mentioned elastic action on the two lips.
Further, as shown in fig. 1 and 2, the cross-section of the lower portion of the ptfe ring 2 is rectangular, and the upper surfaces of the inner ring lip 22 and the outer ring lip 23 are flush, so as to be conveniently and accurately aligned and installed in the gap of the installation groove of the seal ring 100, such as the outer periphery of the piston 300 or the inner periphery of the cylinder 200.
Further, as shown in fig. 2 and 4, when the seal ring 100 is mounted on the outer circumference of the piston 300, the seal ring 100 moves together with the piston 300, and at this time, the inner ring lip 22 is fixed to the piston 300 at the side of the inner ring surface 24 of the ptfe ring sleeve 2, and the outer ring lip 23 is in sliding contact with the inner wall of the cylinder 200 at the side of the outer ring surface 25 of the ptfe ring sleeve 2; therefore, the inner ring lip 22 can be positioned on one side of the inner ring surface 24 of the ptfe ring sleeve 2 and parallel to the inner ring surface 24 of the lower portion of the ptfe ring sleeve 2, so that no unnecessary clearance exists between the seal ring 100 and the outer periphery of the piston 300, and close fitting is achieved. Furthermore, as shown in fig. 1, when the seal ring 100 is installed on the outer periphery of the piston 300, the portion of the inner annular lip 22 parallel to the inner annular surface 24 of the lower portion of the ptfe annular sleeve 2 is the fixed contact surface 26, and the side of the outer annular lip 23 located on the outer annular surface 25 of the ptfe annular sleeve 2 is the sliding contact surface; at this time, at least one annular groove 261 may be formed on the fixed contact surface 26 for anti-slip positioning of the ptfe annular sleeve 2, so that the sealing ring 100 is more stably fixed to the outer periphery of the piston 300.
Similarly, as shown in fig. 5, when the seal ring 100 is mounted on the inner wall of the cylinder 200, the relative position of the seal ring 100 in the cylinder 200 is fixed, and at this time, the outer ring lip 23 is fixed to the inner wall of the cylinder 200 on the side of the outer ring surface 25 of the ptfe ring sleeve 2, and the inner ring lip 22 is in sliding contact with the piston rod 400 on the side of the inner ring surface 24 of the ptfe ring sleeve 2; therefore, the outer ring lip 23 can be positioned on one side of the outer ring surface 25 of the ptfe ring sleeve 2 and parallel to the outer ring surface 25 of the lower portion of the ptfe ring sleeve 2, so that no excessive clearance exists between the seal ring 100 and the inner wall of the piston cylinder 200, thereby achieving tight attachment. Similarly, when the seal ring 100 is installed on the inner wall of the cylinder 200, the portion of the outer annular lip 23 parallel to the outer annular surface 25 of the lower portion of the ptfe annular sleeve 2 is a fixed contact surface 26, and the side of the inner annular lip 22 located on the inner annular surface 24 of the ptfe annular sleeve 2 is a sliding contact surface; at least one annular groove 261 for the anti-slip positioning of the polytetrafluoroethylene annular sleeve 2 is formed in the fixed contact surface 26, so that the purpose of more stably fixing the seal ring 100 can be achieved.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The sealing ring for the hydrogen compressor is characterized by comprising an elastic ring with a V-shaped section and a polytetrafluoroethylene annular sleeve wrapping the elastic ring, wherein an annular cavity with the same direction as the opening direction of the elastic ring is formed in the upper side surface of the polytetrafluoroethylene annular sleeve, and the annular cavity divides the upper part of the polytetrafluoroethylene annular sleeve into an inner annular lip and an outer annular lip with V-shaped sections; the bottom of the elastic ring is distributed at the lower part of the polytetrafluoroethylene annular sleeve, and two free ends of the elastic ring, which are distributed in a V shape, respectively extend to positions corresponding to the inner ring lip and the outer ring lip.
2. The gasket ring of claim 1, wherein the cross-section of the lower portion of the ptfe ring is rectangular, and the upper surfaces of the inner and outer annular lips are flush.
3. The seal ring for a hydrogen compressor according to claim 2, wherein the inner ring lip is located on one side of the inner ring surface of the polytetrafluoroethylene annular sleeve and is parallel to the inner ring surface of the lower portion of the polytetrafluoroethylene annular sleeve.
4. The seal ring for a hydrogen compressor according to claim 3, wherein a portion of the inner annular lip parallel to an inner annular surface of a lower portion of the polytetrafluoroethylene annular sleeve is a fixed contact surface, and a side of the outer annular lip on an outer annular surface of the polytetrafluoroethylene annular sleeve is a sliding contact surface; and at least one annular groove for anti-skid positioning of the polytetrafluoroethylene annular sleeve is formed in the fixed contact surface.
5. The gasket for a hydrogen compressor according to claim 2, wherein the outer annular lip is located on one side of an outer annular surface of the polytetrafluoroethylene annular sleeve in parallel with an outer annular surface of a lower portion of the polytetrafluoroethylene annular sleeve.
6. The seal ring for a hydrogen compressor according to claim 4, wherein a portion of the outer ring lip parallel to an outer ring surface of a lower portion of the polytetrafluoroethylene ring is a fixed contact surface, and a side of the inner ring lip located on an inner ring surface of the polytetrafluoroethylene ring is a sliding contact surface; and at least one annular groove for anti-skid positioning of the polytetrafluoroethylene annular sleeve is formed in the fixed contact surface.
7. The seal ring for a hydrogen compressor according to any one of claims 1 to 6, wherein a first retaining edge is provided on a side of the inner annular lip close to the outer annular surface of the polytetrafluoroethylene annular sleeve, and a second retaining edge is provided on a side of the outer annular lip close to the inner annular surface of the polytetrafluoroethylene annular sleeve; the elastic ring is arranged in the ring cavity, and two free ends distributed in a V shape are respectively abutted against the lower side surface of the first blocking edge and the lower side surface of the second blocking edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121421506.1U CN215567884U (en) | 2021-06-24 | 2021-06-24 | Sealing ring for hydrogen compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121421506.1U CN215567884U (en) | 2021-06-24 | 2021-06-24 | Sealing ring for hydrogen compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215567884U true CN215567884U (en) | 2022-01-18 |
Family
ID=79820507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121421506.1U Active CN215567884U (en) | 2021-06-24 | 2021-06-24 | Sealing ring for hydrogen compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215567884U (en) |
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2021
- 2021-06-24 CN CN202121421506.1U patent/CN215567884U/en active Active
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