CN203023474U - Lip seal assembly provided with supporting spring at lip port - Google Patents
Lip seal assembly provided with supporting spring at lip port Download PDFInfo
- Publication number
- CN203023474U CN203023474U CN 201220737872 CN201220737872U CN203023474U CN 203023474 U CN203023474 U CN 203023474U CN 201220737872 CN201220737872 CN 201220737872 CN 201220737872 U CN201220737872 U CN 201220737872U CN 203023474 U CN203023474 U CN 203023474U
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- CN
- China
- Prior art keywords
- lip
- ring
- spring
- seal assembly
- shoulder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Sealing With Elastic Sealing Lips (AREA)
Abstract
The utility model relates to a lip seal assembly provided with a supporting spring at a lip port. The lip seal assembly comprises a lip seal ring which is composed of an upper lip part, a lower lip part and a shoulder part, wherein the tail ends of the upper lip part and the lower lip part, and the shoulder part are integrally processed into a whole; the upper lip part, the lower lip part and the shoulder part form an annular lip port with a C-shaped section; an annular supporting spring is arranged in the lip-shaped lip port; a check ring comprises an annular framework which is externally wrapped with rubber; and an assembling groove for installing the check ring is positioned at one end of a contact seal surface of a bearing side of the shoulder part. According to the lip seal assembly provided with the supporting spring at the lip port, the supporting spring is arranged in the annular lip port, the counterforce of the supporting spring supports the upper lip part and/or the lower lip part while the seal ring is stressed, and thus the pressure resistance of the lip seal ring can be effectively improved; the check ring and the lip seal ring are matched for use, so that the shoulder part of the lip-type seal ring can be effectively prevented from being extruded from a clearance in the seal surface under the tension effect.
Description
Technical field
The utility model relates to the lip seal assembly that a kind of lip is provided with supported spring, belongs to the sealing for pressure vessels field.
Background technique
Existing lip-type packing, lip is thinner, and is powerful limited, and easily damaged, especially the situation of negative pressure appears in the environment of seal ring work sometimes, makes the lip can be larger to the inboard deformation of lip, causes leakage.
the seal ring of commonly using at present, its root often can be extruded from the gap under pressure, usually can install in the pressure-bearing side of seal ring and use nylon, the back-up ring that the hard material such as teflon or polyether-ether-ketone is made, these back-up rings are designed to annular shape more, be divided into opening and the form such as opening not, be arranged on the suitable positions such as root of seal ring pressure-bearing side, so that the back-up ring baffle seal circle by these hard produces excessive deformation because being subject to pressure medium on respective direction, avoid seal ring to be extruded from the gap and cause seal failure, when the seal ring of these back-up rings and large specification (size) supports the use, there are the following problems in meeting: be to reduce packaging volume, usually can be with its suitable twisting before the seal ring packing of large specification, folding to reduce volume, but when being provided with the hard back-up ring, can make nylon due to folding, the back-up ring that the hard material such as teflon or polyether-ether-ketone the is made inefficacy that is badly damaged, therefore can not fold, this brings very large trouble just for the even on-the-spot installation of packing and accumulating.can not fold for overcoming the hard back-up ring defective of bringing, people attempt adopting the garter spring of end-to-end to substitute the hard back-up ring, but because helical spring exists pitch gap and arbitrarily bending, directly adopt helical spring to substitute the hard back-up ring and can not play due technique effect, thus, someone attempts garter spring is directly vulcanized in seal ring, helical spring is fixed in seal ring, to overcome because of the random mobile not good problem of blocking effect that causes of helical spring independently, but the relative volume due to helical spring in mould is less, free space is large, very easily break away from due position because being out of shape or moving in sulfidation, therefore to make the product percent of pass of seal ring often very low for this mode.
The model utility content
For overcoming the above-mentioned deficiency of prior art, the purpose of this utility model is the lip seal assembly that provides a kind of lip to be provided with supported spring can effectively improve the anti-pressure ability of lip-type packing.
the technical solution adopted in the utility model: a kind of lip is provided with the lip seal assembly of supported spring, comprise lip-type packing, described lip-type packing comprises upper lip, lower lips and shoulder, the end of described upper lip and lower lips and described shoulder are processed into one, described upper lip, lower lips and shoulder consist of the annular lip that the cross section is the C type, be provided with the supported spring of annular in described annular lip, described back-up ring comprises ring skeleton, described ring skeleton is coated with rubber, the opening direction of described annular lip is when the center of described lip-type packing, the external diameter of the supported spring of described annular is identical with the external diameter size of described annular lip, the external diameter of described back-up ring is identical with the external diameter size of described shoulder, the internal diameter of described back-up ring is greater than the internal diameter of described shoulder, the opening direction of described annular lip is dorsad during the center of described lip-type packing, the internal diameter of the supported spring of described annular is big or small identical with the internal diameter of described annular lip, the internal diameter of described back-up ring is identical with the internal diameter size of described shoulder, the external diameter of described back-up ring is less than the external diameter of described shoulder, one end of the contact sealing surface of the pressure-bearing side of described shoulder is provided with the sectional shape fitting recess identical with the sectional shape of described back-up ring.
The cross section of described supported spring is preferably rounded.
Described supported spring can be the helical spring of end-to-end.
Described helical spring external diameter preferably is not more than the internal diameter in the cross section of described annular lip.
Described helical spring spring ring axial clearance can be 0～5mm.
Described helical spring can be carbon steel wire helical spring or Stainless Steel Wire helical spring.
The cross section of described back-up ring can be rectangular, trapezoidal, triangle or stair-stepping above-mentioned shape.
The hardness of described rubber preferably is not less than the hardness of described lip-type packing, the hardness of described rubber is preferably IRHD70～90 degree, and described rubber can be nitrile butadiene rubber, hydrogenated nitrile-butadiene rubber, butyl rubber, neoprene, carboxyl butyronitrile, chlorohydrin rubber, polyacrylate or fluorine rubber.
Described ring skeleton can be the helical spring of end-to-end, and the preferred rounded or rectangle in cross section can be carbon steel wire helical spring or Stainless Steel Wire helical spring as the helical spring of described ring skeleton.
Helical spring spring thread diameter as described ring skeleton is preferably 0.3～1.5mm, and spring ring axial clearance is preferably 0～5mm.
The beneficial effects of the utility model: owing to being provided with supported spring in described annular lip, be under pressure in upper lip and/or lower lips and do the used time, the reaction force of supported spring can be played a supporting role to upper lip and/or lower lips, effectively improve the anti-pressure ability of lip-type packing, and then improve sealing effect.When negative pressure appearred in the environment of lip-type packing work, the reaction force of supported spring can prevent effectively also that upper lip and/or lower lips deformation are excessive and cause leakage.
described back-up ring can be by suitable twisting, folding packing and the transportation volume of reducing, than adopting nylon, the back-up ring that teflon or polyetheretherketonematerials materials are made instant packed and the transportation, better than the anti-high pressure extrusion performance of back-up ring that adopts single rubber material to make, ring skeleton of the present utility model can effectively guarantee product size and shape of product in sulfidation, avoid occuring because of the mobile situations such as camber of spring or positioning that cause of sizing material in sulfidation, seal ring manufacturing process than embedded metal sulphide skeleton is simpler, the defective products rate is lower.
The utility model adopts back-up ring and lip-type packing to be used in conjunction with, back-up ring is arranged on the end of contact sealing surface of pressure-bearing side of the shoulder of lip-type packing, the shoulder that can effectively prevent lip-type packing is under pressure extruded from the gap of sealing surface, simultaneously, back-up ring of the present utility model separates with seal ring, as a product independently, can support the use with the seal ring of various structures form, Applicable scope is more extensive.
Description of drawings
Fig. 1 is the schematic cross-section of opening direction when the center of seal ring of annular lip of the present utility model;
Fig. 2 is the opening direction schematic cross-section the during center of seal ring dorsad of annular lip of the present utility model.
Embodiment
referring to Fig. 1 and Fig. 2, the lip seal assembly that the utility model provides a kind of lip to be provided with supported spring, comprise lip-type packing, described lip-type packing comprises upper lip 1, lower lips 2 and shoulder 3, the end of described upper lip and lower lips and described shoulder are processed into one, described upper lip, lower lips and shoulder consist of the annular lip 4 that the cross section is the C type, be provided with the supported spring 5 of annular in described annular lip, described back-up ring comprises ring skeleton 6, described ring skeleton is coated with rubber 7, the supported spring of described annular and the size of back-up ring are decided according to the opening direction of described annular lip, when the opening direction of described annular lip during towards the center of described lip-type packing, the external diameter of the supported spring of described annular is identical with the external diameter size of described annular lip, the external diameter of described back-up ring is identical with the external diameter size of described shoulder, the internal diameter of described back-up ring is greater than the internal diameter of described shoulder, when the opening direction of described annular lip dorsad during the center of described lip-type packing, the internal diameter of the supported spring of described annular is big or small identical with the internal diameter of described annular lip, the internal diameter of described back-up ring is identical with the internal diameter size of described shoulder, the external diameter of described back-up ring is less than the external diameter of described shoulder, the pressure-bearing side of described shoulder (under pressure, press to cell wall one side of the seal groove that seal ring is installed) an end of contact sealing surface be provided with the sectional shape fitting recess identical with the sectional shape of described back-up ring.The coating of described ring skeleton outer rubber can adopt sulfuration process to complete.
Described supported spring can be the helical spring of end-to-end, and described helical spring can carry out end-to-end by welding or the mode such as screw up.
The cross section of described supported spring is preferably rounded, described helical spring external diameter preferably is not more than the internal diameter in the cross section of described annular lip, so that the shape of the supported spring of described annular and described annular lip matches, be under pressure in upper lip and/or lower lips and do the used time, can play a supporting role better.During assembling, in the scope that elasticity allows, break upper lip and lower lips into two with one's hands, described supported spring is inlaid in annular lip gets final product.
Described helical spring spring ring axial clearance can be 0～5mm, as: 0mm, 1.0mm, 2.0mm, 3.0mm, 4.0mm or 5.0mm.
Described helical spring can be carbon steel wire helical spring or Stainless Steel Wire helical spring.
The design of described supported spring, be under pressure in the upper lip of described lip-type packing and/or lower lips and do the used time, the reaction force of supported spring can play the effect of support to upper lip and/or lower lips, effectively improve the anti-pressure ability of lip-type packing, and then improves sealing effect.When negative pressure appearred in the environment of lip-type packing work, the reaction force of supported spring can prevent effectively also that upper lip and/or lower lips deformation are excessive and cause leakage.
the cross section of described back-up ring can be rectangular, trapezoidal, triangle or stair-stepping above-mentioned shape, when the sectional shape of described back-up ring is triangular in shape, be preferably right-angled triangle, and the outer rim of back-up ring (opening direction of corresponding lip is towards the center of described lip-type packing) or inner edge (opening direction of corresponding lip is the center of described lip-type packing dorsad) are the right angle side of right-angled triangle, when the sectional shape of described back-up ring is trapezoidal, the outer rim of preferred described back-up ring (opening direction of corresponding lip is towards the center of described lip-type packing) or inner edge (opening direction of corresponding lip is the center of described lip-type packing dorsad) are trapezoidal bottom, so that being face with the cell wall of seal groove in use, described back-up ring contacts, more effectively play the support anti-extrusion effect to seal ring.When rectangular and height is identical with the height of described shoulder when described back-up ring, the pressure-bearing side of described shoulder can be cut away a part, the cross section of the part that cuts away identical with the cross-sectional sizes of described back-up ring (part that namely cuts away is big or small identical with described back-up ring), during use, described back-up ring is adjacent to the pressure-bearing side of described shoulder, described back-up ring and seal ring together are arranged in seal groove.
The utility model adopts back-up ring and lip-type packing to be used in conjunction with, and described back-up ring is arranged on the end of contact sealing surface of the pressure-bearing side of described lip-type packing, can prevent effectively that the shoulder of lip-type packing under pressure from extruding from the gap of sealing surface.
The hardness of described rubber can be identical with the hardness of described lip-type packing or a little more than the hardness of described lip-type packing, preferably a little more than the hardness of described lip-type packing, can improve the anti-extrusion ability of described back-up ring, the hardness of described rubber is preferably IRHD70～90 degree, as IRHD70 degree, IRHD80 degree or IRHD90 degree.Described rubber can be identical with the material of described lip-type packing, also can be different from the material of described lip-type packing, described rubber can be nitrile butadiene rubber, hydrogenated nitrile-butadiene rubber, butyl rubber, neoprene, carboxyl butyronitrile, chlorohydrin rubber, polyacrylate or fluorine rubber.
Described ring skeleton can be the helical spring of end-to-end, the preferred rounded or rectangle in cross section, helical spring as described ring skeleton can be carbon steel wire helical spring or Stainless Steel Wire helical spring, the spring of also can other suitable material of making spring making can carry out end-to-end by welding or the mode such as screw up.
Preferably, the cross-sectional width of described back-up ring and described helical spring external diameter are basic identical, and more approaching better (theoretical value is identical) only needs to guarantee that described helical spring the positioning phenomenon do not occur and gets final product in sulfidation.
Helical spring spring thread diameter as described ring skeleton is preferably 0.3～1.5mm, as 0.3mm, 0.5mm, 0.8mm, 1.0mm or 1.5mm, spring ring axial clearance is preferably 0～5mm, as 0mm, 1.0mm, 2.0mm, 3.0mm, 4.0mm or 5.0mm, in the situation that the height of the shoulder of described lip-type packing and thickness allow, helical spring external diameter as described ring skeleton is preferably 2～10mm, as 2mm, 4mm, 5mm, 8mm or 10mm.
Claims (10)
1. a lip is provided with the lip seal assembly of supported spring, it is characterized in that comprising lip-type packing, described lip-type packing comprises upper lip, lower lips and shoulder, the end of described upper lip and lower lips and described shoulder are processed into one, described upper lip, lower lips and shoulder consist of the annular lip that the cross section is the C type, be provided with the supported spring of annular in described annular lip, described back-up ring comprises ring skeleton, described ring skeleton is coated with rubber, the opening direction of described annular lip is when the center of described lip-type packing, the external diameter of the supported spring of described annular is identical with the external diameter size of described annular lip, the external diameter of described back-up ring is identical with the external diameter size of described shoulder, the internal diameter of described back-up ring is greater than the internal diameter of described shoulder, the opening direction of described annular lip is dorsad during the center of described lip-type packing, the internal diameter of the supported spring of described annular is big or small identical with the internal diameter of described annular lip, the internal diameter of described back-up ring is identical with the internal diameter size of described shoulder, the external diameter of described back-up ring is less than the external diameter of described shoulder, one end of the contact sealing surface of the pressure-bearing side of described shoulder is provided with the sectional shape fitting recess identical with the sectional shape of described back-up ring.
2. lip as claimed in claim 1 is provided with the lip seal assembly of supported spring, it is characterized in that the cross section of described supported spring is rounded.
3. lip as claimed in claim 2 is provided with the lip seal assembly of supported spring, it is characterized in that described supported spring is the helical spring of end-to-end.
4. lip as claimed in claim 3 is provided with the lip seal assembly of supported spring, it is characterized in that described helical spring external diameter is not more than the internal diameter in the cross section of described annular lip.
5. lip as claimed in claim 4 is provided with the lip seal assembly of supported spring, it is characterized in that described helical spring spring ring axial clearance is 0～5mm.
6. lip as claimed in claim 5 is provided with the lip seal assembly of supported spring, it is characterized in that described helical spring is carbon steel wire helical spring or Stainless Steel Wire helical spring.
7. be provided with the lip seal assembly of supported spring as claim 1,2,3,4,5 or 6 described lips, it is characterized in that the cross section of described back-up ring is rectangular, trapezoidal, triangle or stair-stepping above-mentioned shape.
8. lip as claimed in claim 7 is provided with the lip seal assembly of supported spring, it is characterized in that the hardness of described rubber is not less than the hardness of described lip-type packing, the hardness of described rubber is IRHD70～90 degree, and described rubber is nitrile butadiene rubber, hydrogenated nitrile-butadiene rubber, butyl rubber, neoprene, carboxyl butyronitrile, chlorohydrin rubber, polyacrylate or fluorine rubber.
9. lip as claimed in claim 8 is provided with the lip seal assembly of supported spring, it is characterized in that described ring skeleton is the helical spring of end-to-end, rounded or the rectangle in cross section is carbon steel wire helical spring or Stainless Steel Wire helical spring as the helical spring of described ring skeleton.
10. lip as claimed in claim 9 is provided with the lip seal assembly of supported spring, it is characterized in that the helical spring spring thread diameter as described ring skeleton is 0.3～1.5mm, and spring ring axial clearance is 0～5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220737872 CN203023474U (en) | 2012-12-28 | 2012-12-28 | Lip seal assembly provided with supporting spring at lip port |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220737872 CN203023474U (en) | 2012-12-28 | 2012-12-28 | Lip seal assembly provided with supporting spring at lip port |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203023474U true CN203023474U (en) | 2013-06-26 |
Family
ID=48647461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220737872 Expired - Fee Related CN203023474U (en) | 2012-12-28 | 2012-12-28 | Lip seal assembly provided with supporting spring at lip port |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203023474U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106402387A (en) * | 2016-07-26 | 2017-02-15 | 北京化工大学 | Rubber sealing ring used for gas filter locking ring type quick-opening blind plate structure |
| CN112976638A (en) * | 2021-03-15 | 2021-06-18 | 淮安方圆锻造有限公司 | Manufacturing process of wellhead sealing element for oil extraction machine |
-
2012
- 2012-12-28 CN CN 201220737872 patent/CN203023474U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106402387A (en) * | 2016-07-26 | 2017-02-15 | 北京化工大学 | Rubber sealing ring used for gas filter locking ring type quick-opening blind plate structure |
| CN112976638A (en) * | 2021-03-15 | 2021-06-18 | 淮安方圆锻造有限公司 | Manufacturing process of wellhead sealing element for oil extraction machine |
| CN112976638B (en) * | 2021-03-15 | 2022-07-26 | 淮安方圆锻造有限公司 | Manufacturing process of wellhead sealing element for oil extraction machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20171009 Address after: 510700 Whampoa, Guangdong Province, Mao Road, District No. 828, No. Patentee after: GUANGZHOU MECHANICAL ENGINEERING RESEARCH INSTITUTE Co.,Ltd. Address before: 100096, No. ten, East Road, building materials City, Beijing, Haidian District Patentee before: BEIJING HUADE GUANGYAN SEALS Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130626 Termination date: 20211228 |