CN220668352U - Abnormal shape sealing washer and motion subassembly - Google Patents
Abnormal shape sealing washer and motion subassembly Download PDFInfo
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- CN220668352U CN220668352U CN202322359622.0U CN202322359622U CN220668352U CN 220668352 U CN220668352 U CN 220668352U CN 202322359622 U CN202322359622 U CN 202322359622U CN 220668352 U CN220668352 U CN 220668352U
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- 238000007789 sealing Methods 0.000 title claims abstract description 79
- 230000002159 abnormal effect Effects 0.000 title description 2
- 239000011159 matrix material Substances 0.000 claims abstract description 6
- 239000000758 substrate Substances 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 18
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model discloses a special-shaped sealing ring, which comprises an annular substrate (1) and is characterized in that: the middle part of the outer circular wall of the matrix (1) is provided with a first groove (1-1) to form two outer convex lips (A) which are distributed at intervals, and the width of the section of the first groove (1-1) is gradually reduced from the outer end to the bottom end of the first groove; the middle parts of the left side wall and the right side wall of the base body (1) are respectively provided with a second groove (1-2); the width of the section of the second groove (1-2) is gradually reduced from the outer end to the bottom end. The special-shaped sealing ring has the advantages of being capable of improving large in yielding deformation, improving sealing performance, reducing the requirement on matching precision, being smaller in movement resistance and the like. In addition, the utility model also discloses a motion assembly.
Description
Technical Field
The utility model belongs to the technical field of valves, and particularly relates to a special-shaped sealing ring and a motion assembly.
Background
The pilot valve structure of the pilot valve controls the piston to move forward or backward (i.e. return water or water inflow) in a piston movement cavity in the valve body through the flow of fluid, so as to respectively control the opening or closing state of the valve (refer to CN 218377691U). And a sealing ring (namely a sealing element) is arranged between the original piston and the inner wall of the piston motion cavity in the valve body, and the section of the sealing ring is rectangular or circular. The following disadvantages exist during use:
firstly, when a rectangle is adopted, the stress area after the sealing ring is attached to the inner wall of the piston movement cavity is large, the movement resistance is large when backwater and water are fed, the requirement on the dimensional precision and the surface precision of the inner wall of the piston movement cavity is high due to insufficient compression deformation, the requirement on the pressure difference of the piston is higher, the control is not flexible enough, and particularly, the performance is influenced when dirt is attached to the inner wall;
secondly, when the circular shape is adopted, the sealing ring is small in stress area after being attached to the inner wall of the piston movement cavity, the sealing performance is insufficient, the requirement on the dimensional precision and the surface precision of the inner wall of the piston movement cavity is high due to insufficient compression deformation, and the leakage resistance is poor; particularly when dirt adheres to the inner wall.
Disclosure of Invention
The utility model provides a special-shaped sealing ring, which solves the problems of high requirement on matching precision, high resistance and insufficient sealing performance caused by insufficient yielding deformation when the existing special-shaped sealing ring is matched with the inner wall of a piston motion cavity.
In order to achieve the above purpose, the scheme of the utility model is as follows: the utility model provides a special-shaped sealing washer, includes annular base member, its characterized in that: the middle part of the outer circular wall of the matrix is provided with a first groove to form two outer convex lips A which are distributed at intervals, and the width of the section of the first groove is gradually reduced from the outer end to the bottom end of the first groove; the middle parts of the left side wall and the right side wall of the matrix are respectively provided with a second groove; the width of the second groove section is gradually reduced from the outer end to the bottom end. By adopting the scheme, 7-8 can be combined, and the special-shaped sealing ring is arranged between the piston and the inner wall of the piston motion cavity in the valve body during assembly; when the special-shaped sealing ring is used, the two outer convex lips A of the special-shaped sealing ring are attached to the inner wall of the piston motion cavity.
7-8, a first groove is formed between the two outer lips A during movement, so that liquid on the high pressure side of the piston can axially press one outer lip A on the corresponding side of F, and a space for the outer lip A to deform is provided in the first groove; the first groove is gradually reduced from the outer end to the bottom end, so that the outer end of the outer lip A is deformed in the inclined direction R, the outer end of the outer lip A can generate a component of radial outward deformation (specifically, the inclined R deformation of the outer lip A can be decomposed into radial vector deformation and axial vector deformation), the outer lip A can be tightly attached to the inner wall of a piston motion cavity in a valve body after being pressed and deformed, the sealing performance is further improved, the larger the outer lip A is deformed when the liquid pressure is higher, the sealing capability is synchronously increased or synchronously reduced along with the liquid pressure, and therefore, the requirement on the matching precision of the special-shaped sealing ring and the inner wall of the piston motion cavity is lower when the special-shaped sealing ring is matched; meanwhile, the contact surface between the outer convex lip A at the high pressure side and the inner wall of the piston motion cavity in the valve body is small, the resistance is small, and the motion is flexible, so that the problems of high requirement on the matching precision, high resistance and insufficient tightness caused by insufficient yielding deformation when the special-shaped sealing ring is matched with the inner wall of the piston motion cavity can be solved.
7-8, in addition, the middle parts of the left and right side walls of the base body are respectively provided with a second groove; the width of the section of the second groove is gradually reduced from the outer end to the bottom end of the second groove, liquid on the high pressure side of the piston can enter the second groove to obliquely extrude F to extrude one outer convex lip A on the corresponding side, so that the outer convex lip A can be pressed and deformed to provide larger radial outward partial pressure (specifically, the inclined force F can be decomposed into radial vector force and axial vector force), the extra attaching force of the outer convex lip A and the inner wall of a piston motion cavity in the valve body during radial sealing can be improved, the tightness can be improved, the extra attaching force of the outer convex lip A can be higher along with the increase of liquid pressure, the sealing performance is stronger, and the piston motion cavity can be used for different pressure working conditions and has a very wide application range.
Therefore, the special-shaped sealing ring adopts the first groove, the outer end of the first groove is gradually reduced to the bottom end for controlling the deformation of the oblique direction (R direction), and simultaneously adopts the second groove, the outer end of the second groove is gradually reduced to the bottom end for applying the additional sealing pressure of the oblique direction (F direction), and the two are skillfully combined, so that the special-shaped sealing ring has the advantages of wide application pressure range, large yielding deformation, high sealing performance, small movement resistance, low requirement on the precision of the inner wall of the piston movement cavity and the like.
Preferably, the first groove section is isosceles trapezoid.
Preferably, the second groove section is isosceles trapezoid.
Further, a third groove is formed in the middle of the inner circular wall and the outer circular wall of the base body to form two inner convex lips (B) which are distributed at intervals, and the width of the section of the third groove is gradually reduced from the outer end to the bottom end of the third groove.
Preferably, the cross section profile of the special-shaped sealing ring is formed by combining a positive Y shape and an inverted Y shape.
Another object of the present utility model is to provide a movement assembly comprising a valve body and a piston, the valve body having a piston movement chamber disposed therein, characterized in that; the special-shaped sealing ring in the technical scheme is arranged between the piston and the piston movement cavity.
Preferably, a clamping groove is formed in the outer circular wall of the piston; the special-shaped sealing ring is sleeved in the clamping groove, and the outer circular wall of the piston is positioned between the upper outer edge and the lower outer edge of the second groove.
Preferably, the clearance distance (H) between the outer circumferential wall of the piston and the upper outer edge of the second groove is 2mm-4mm.
The utility model has the beneficial effects that:
the first and the second special-shaped sealing rings adopt the first grooves, the outer ends of the first grooves are gradually reduced to the bottom ends of the first grooves and are used for controlling the deformation of the oblique direction (R direction), and the second grooves are simultaneously adopted, the outer ends of the second grooves are gradually reduced to the bottom ends of the second grooves and are used for applying the additional sealing pressure of the oblique direction (F2 direction), and the first and the second special-shaped sealing rings are skillfully combined, so that the special-shaped sealing rings have the advantages of wide application pressure range, large yielding deformation, high sealing performance, small movement resistance, low precision requirement on the inner wall of a piston movement cavity and the like.
Secondly, the middle part of the inner and outer circular walls of the substrate is provided with the third grooves to form the two inner convex lips B which are distributed at intervals, the width of the section of the third grooves is gradually reduced from the outer end to the bottom end of the third grooves, liquid at the high pressure side of the piston can enter the second grooves to obliquely extrude F3 to extrude one inner convex lip B at the corresponding side, so that the inner convex lip B can be subjected to compression deformation to provide larger radial inward partial pressure, the extra bonding force of the inner convex lip B and the inner wall of the clamping groove during radial sealing can be improved, the tightness can be improved, the extra bonding force of the inner convex lip B can be higher along with the increase of the liquid pressure, the clamping groove and the sealing performance of the special-shaped sealing ring and the piston are stronger, and the special-shaped sealing ring can be used for different pressure working conditions and has a very wide application range;
third, because the outer circular wall of the piston is positioned between the upper outer edge and the lower outer edge of the second groove, liquid can enter the second groove, and extra sealing pressure is generated for the outer convex lip A or/and the inner convex lip B; and meanwhile, the clearance distance H between the outer circumferential wall of the piston and the upper outer edge of the second groove is 2mm-4mm. It is ensured that the liquid can quickly enter the second recess to fill and create additional sealing pressure.
Drawings
Fig. 1 is a perspective view of a profiled seal ring in accordance with a first embodiment of the present utility model.
Fig. 2 is a semi-cutaway perspective view of a profiled seal ring in accordance with a first embodiment of the utility model.
Fig. 3 is a cross-sectional view of a profiled seal ring in accordance with a first embodiment of the utility model.
Fig. 4 is a perspective view of a special-shaped seal ring in a second embodiment of the utility model.
Fig. 5 is a semi-sectional perspective view of a special seal ring in a second embodiment of the utility model.
Fig. 6 is a cross-sectional view of a profiled sealing ring in a second embodiment of the utility model.
Fig. 7 is a schematic structural diagram of a motion assembly according to a third embodiment of the present utility model using the special-shaped seal ring according to the first embodiment.
Fig. 8 is an enlarged view at C in fig. 7.
Fig. 9 is a schematic structural view of a motion assembly according to the third embodiment of the present utility model when the special-shaped seal ring according to the second embodiment is adopted.
Fig. 10 is an enlarged view of D in fig. 9.
Detailed Description
The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:
embodiment one: referring to fig. 1-3, a special-shaped sealing ring comprises an annular base body 1, wherein a first groove 1-1 is arranged in the middle of the outer circular wall of the base body 1 to form two outer convex lips A which are distributed at intervals, and the width of the section of the first groove 1-1 is gradually reduced from the outer end to the bottom end of the first groove.
The middle parts of the left side wall and the right side wall of the matrix 1 are respectively provided with a second groove 1-2; the width of the section of the second groove 1-2 is gradually reduced from the outer end to the bottom end thereof.
In this embodiment, the cross section of the first groove 1-1 is isosceles trapezoid. This is achieved in that the width of the cross section of the first recess 1-1 becomes gradually smaller from its outer end to its bottom end. In other embodiments, it may take the form of a V-shape.
In this embodiment, the section of the second groove 1-2 is isosceles trapezoid. This is achieved in that the width of the cross section of the second recess 1-2 becomes smaller from its outer end to its lower end. In other embodiments, it may take the form of a V-shape.
The special-shaped sealing ring can be combined with 7-8, and is arranged between the piston 3 and the inner wall 2-1 of the piston motion cavity in the valve body 2 during assembly; when the special-shaped sealing ring is used, the two outer lips A of the special-shaped sealing ring are attached to the inner wall 2-1 of the piston motion cavity.
7-8, since the first groove 1-1 is arranged between the two outer lips A during movement, the liquid on the high pressure side of the piston can axially press one outer lip A on the corresponding side of F1, and a space for the outer lip A to deform is provided in the first groove 1-1; the outer end of the first groove 1-1 is gradually reduced from the outer end to the bottom end, so that the outer end of the outer lip A is deformed in the inclined direction R, the outer end of the outer lip A generates a component of radial outward deformation, the outer lip A is tightly attached to the inner wall of a piston motion cavity in a valve body after being pressed and deformed, the sealing performance is improved, the deformation of the outer lip A is also larger when the liquid pressure is larger, the sealing capability of the outer lip A is synchronously increased or synchronously reduced along with the liquid pressure, and therefore, the requirement on the matching precision of the special-shaped sealing ring and the inner wall of the piston motion cavity is lower when the special-shaped sealing ring is matched; meanwhile, the contact surface between the outer convex lip A at the high pressure side and the inner wall of the piston motion cavity in the valve body is small, the resistance is small, and the motion is flexible, so that the problems of high requirement on the matching precision, high resistance and insufficient tightness caused by insufficient yielding deformation when the special-shaped sealing ring is matched with the inner wall of the piston motion cavity can be solved.
7-8 can be combined, and the middle parts of the left side wall and the right side wall of the base body 1 are respectively provided with a second groove 1-2; the width of the section of the second groove 1-2 is gradually reduced from the outer end to the bottom end, liquid at the high pressure side of the piston can enter the second groove to obliquely extrude F2 to extrude one outer convex lip A at the corresponding side, so that the outer convex lip A can be pressed and deformed to provide larger radial outward partial pressure, the extra attaching force of the outer convex lip A and the inner wall of a piston motion cavity in the valve body during radial sealing can be improved, the sealing performance can be improved, the extra attaching force of the outer convex lip A can be higher along with the increase of the liquid pressure, the sealing performance is stronger, and the piston motion cavity can be used for different pressure working conditions and has a very wide application range.
Therefore, the special-shaped sealing ring adopts the first groove 1-1, the outer end of the first groove 1-1 is gradually reduced to the bottom end for controlling the deformation of the slant (R direction), and simultaneously adopts the second groove 1-2, the outer end of the second groove 1-2 is gradually reduced to the bottom end for applying the extra sealing pressure of the slant (F2 direction) (see fig. 8), and the two are skillfully combined, so that the special-shaped sealing ring has the advantages of wide application pressure range, large yielding deformation, high sealing performance, small movement resistance, low requirement on the precision of the inner wall of the piston movement cavity and the like.
Specifically, the special-shaped sealing ring is made of rubber material and is molded by a mold.
Embodiment two: this embodiment is substantially the same as embodiment one, except that:
referring to fig. 4-6, a third groove 1-3 is formed in the middle of the inner and outer circular walls of the base 1 to form two inner convex lips B which are spaced apart, and the width of the cross section of the third groove 1-3 is gradually reduced from the outer end to the bottom end thereof.
Preferably, the cross section profile of the special-shaped sealing ring is formed by combining a positive Y shape and an inverted Y shape.
In combination with fig. 9-10, during assembly, the two inner convex lips B are sealed with the clamping groove 3-1 of the piston 3 in a matching manner, and as the width of the section of the third groove 1-3 gradually decreases from the outer end to the bottom end of the third groove, the liquid at the high pressure side of the piston can enter the second groove to obliquely extrude the F3 to extrude one inner convex lip B at the corresponding side, so that the inner convex lip B can be deformed to provide larger radial inward partial pressure, the additional adhesive force of the inner convex lip B and the inner wall of the clamping groove 3-1 during radial sealing can be improved, the tightness can be improved, the additional adhesive force of the inner convex lip B can be higher when the liquid pressure increases, and the special-shaped sealing ring and the clamping groove 3-1 of the piston 3 have stronger sealing performance, therefore, the sealing device can be used for different pressure working conditions, and has a very wide application range.
Embodiment III: referring to fig. 7-10, a motion assembly comprises a valve body 2 and a piston 3, wherein a piston motion cavity 2-1 is arranged in the valve body 2, and a special-shaped sealing ring in the first embodiment or the second embodiment is arranged between the piston 3 and the piston motion cavity 2-1.
Preferably, a clamping groove 3-1 is formed in the outer circular wall of the piston 3; the special-shaped sealing ring is sleeved in the clamping groove 3-1, and the outer circular wall of the piston 3 is positioned between the upper outer edge and the lower outer edge of the second groove 1-2. Allowing liquid to enter the second groove 1-2 and creating additional sealing pressure against the outer lip a or/and the inner lip B.
Preferably, the clearance distance H between the outer circular wall of the piston 3 and the upper outer edge of the second groove 1-2 is 2mm-4mm. It is ensured that the liquid can quickly enter the second recess 1-2 to fill and create additional sealing pressure.
The foregoing describes in detail preferred embodiments of the present utility model. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the utility model by one of ordinary skill in the art without undue burden. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.
Claims (8)
1. The utility model provides a special-shaped sealing washer, includes annular base member (1), its characterized in that:
the middle part of the outer circular wall of the matrix (1) is provided with a first groove (1-1) to form two outer convex lips (A) which are distributed at intervals, and the width of the section of the first groove (1-1) is gradually reduced from the outer end to the bottom end of the first groove;
the middle parts of the left side wall and the right side wall of the base body (1) are respectively provided with a second groove (1-2); the width of the section of the second groove (1-2) is gradually reduced from the outer end to the bottom end.
2. A profiled sealing ring as defined in claim 1 wherein: the cross section of the first groove (1-1) is isosceles trapezoid.
3. A profiled sealing ring as defined in claim 1 wherein: the section of the second groove (1-2) is isosceles trapezoid.
4. A profiled sealing ring as defined in claim 1 wherein: the middle part of the inner and outer circular walls of the matrix (1) is provided with a third groove (1-3) to form two inner convex lips (B) which are distributed at intervals, and the width of the section of the third groove (1-3) is gradually reduced from the outer end to the bottom end of the third groove.
5. A profiled sealing ring as defined in claim 4 wherein: the profile of the section of the special-shaped sealing ring is formed by combining a positive Y shape and an inverted Y shape.
6. A motion assembly comprises a valve body (2) and a piston (3), wherein a piston motion cavity (2-1) is arranged in the valve body (2), and the motion assembly is characterized in that; a special-shaped sealing ring according to any one of claims 1-5 is arranged between the piston (3) and the piston movement cavity (2-1).
7. A sports assembly as claimed in claim 6, wherein: a clamping groove (3-1) is formed in the outer circular wall of the piston (3);
the special-shaped sealing ring is sleeved in the clamping groove (3-1), and the outer circular wall of the piston (3) is positioned between the upper outer edge and the lower outer edge of the second groove (1-2).
8. A sports assembly as claimed in claim 7, wherein: the clearance distance (H) between the outer circular wall of the piston (3) and the upper outer edge of the second groove (1-2) is 2mm-4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322359622.0U CN220668352U (en) | 2023-08-31 | 2023-08-31 | Abnormal shape sealing washer and motion subassembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322359622.0U CN220668352U (en) | 2023-08-31 | 2023-08-31 | Abnormal shape sealing washer and motion subassembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220668352U true CN220668352U (en) | 2024-03-26 |
Family
ID=90328554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322359622.0U Active CN220668352U (en) | 2023-08-31 | 2023-08-31 | Abnormal shape sealing washer and motion subassembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220668352U (en) |
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2023
- 2023-08-31 CN CN202322359622.0U patent/CN220668352U/en active Active
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