CN108591477B - Method for preventing seal lip from being worn during installation of seal ring - Google Patents
Method for preventing seal lip from being worn during installation of seal ring Download PDFInfo
- Publication number
- CN108591477B CN108591477B CN201810403262.0A CN201810403262A CN108591477B CN 108591477 B CN108591477 B CN 108591477B CN 201810403262 A CN201810403262 A CN 201810403262A CN 108591477 B CN108591477 B CN 108591477B
- Authority
- CN
- China
- Prior art keywords
- sealing ring
- sealing
- filling cavity
- installation
- base body
- 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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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/46—Sealings with packing ring expanded or pressed into place by fluid pressure, e.g. inflatable packings
Abstract
An expandable sealing ring comprises a sealing ring base body and a filling cavity arranged in the sealing ring base body, wherein the sealing ring base body is of an integrated structure, and in the production and processing process of the sealing ring, a proper amount of material A is injected into the filling cavity, the material A does not fill the filling cavity, the filling cavity is ensured to have certain compressibility, and when a sealing element is installed, because the sealing element has high compressibility and is easy to install, and the sealing lip is in clearance fit with the piston rod after the installation is finished, the sealing lip is not abraded in the installation period, after the installation of the sealing ring is finished, injecting a proper amount of material B into the filling cavity, reacting the material B with the material A to form a material C which is solid and expands in volume until the filling cavity is filled with the material C, the sealing ring has certain elasticity and strength, so that the sealing ring is expanded and the volume is increased, and the sealing lip and the piston rod form interference fit.
Description
Technical Field
The invention relates to the technical field of rubber and plastic sealing rings, in particular to an expandable sealing ring.
Background
The structure and performance of the rubber-plastic seal is critical to the operation, performance and service life of the mechanical equipment. Poor sealing performance not only increases friction, wear and power consumption of the machine, thereby shortening the working life of the machine, but also causes environmental pollution and corrosion of equipment due to leakage. Failure of the seal directly affects the efficiency of the complete machine and is associated with a potentially greater economic loss and even a serious safety hazard.
The rubber-plastic reciprocating seal is generally in interference fit during installation, so that a certain contact pressure exists in a seal contact area. When the sealing ring is installed, because the volume of the sealing ring is larger than the space of the sealing groove, the friction and abrasion between the sealing lip and the piston rod can not be avoided during installation, so that the contact pressure of a sealing contact area is reduced, the leakage amount is increased, and the service life of the sealing element is shortened. The existing sealing ring structurally determines the abrasion problem of the sealing lip when the sealing ring is installed, so that the existing sealing ring is inevitable.
At present, the research on the reciprocating sealing performance at home and abroad mainly focuses on the sealing leakage amount and the friction force, and researches on how to reduce the friction coefficient and use a novel material to reduce the abrasion and improve the service life, and the invention patents specially researching on the reduction or elimination of the abrasion of the sealing lip during the installation are few. Therefore, it is highly desirable to design a seal ring that avoids wear of the seal lip during installation and that can perform its sealing function under normal operating conditions.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide an expandable sealing ring, which can effectively improve the reliability of a sealing element, prolong the service life of the sealing element and reduce the damage to a sealing lip in the installation process.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a method that can avoid seal lip wearing and tearing when sealing washer installation adopts expandable seal circle, expandable seal circle includes sealing washer base member 1 and sets up the packing chamber 2 in sealing washer base member 1, sealing washer base member 1 structure as an organic whole, fills chamber 2 and also is the annular, with sealing washer base member 1 centre of a circle altogether, its characterized in that, fill material A in the production and processing in chamber 2, material A is not full of and fills chamber 2, 1 lower extreme of sealing washer base member be the seal lip, during the installation, the seal lip is clearance fit with piston rod 3, after the installation finishes, injects material B in filling chamber 2, material B and material A reaction form material C and be full of whole packing chamber 2, make the sealing washer inflation, volume increase, the seal lip forms interference fit with piston rod 3.
The inner wall of the filling cavity 2 is coated with a layer of polyethylene plastic film.
The sealing ring matrix 1 is nitrile rubber.
The material A is high water absorption resin (SAP), the material B is water (H)2O), material C is a solid.
The injection mode of the material B is needle tube injection.
The invention has the beneficial effects that:
when the piston rod is normally installed, the sealing ring is in clearance fit with the piston rod 3, and the sealing lip is not in abrasion contact with the piston rod; after the installation is finished, the material B is injected into the filling cavity 2 and reacts with the material A to form a material C, and due to the volume expansion of the material C, the sealing lip and the piston rod 3 form interference fit, so that the sealing performance and the reliability of the sealing lip during the working are ensured; the material A and the material B are selected according to different working conditions to form a material C with required material performance, and the application range is wide.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
Fig. 2a is a schematic view before the material B is injected into the sealing ring filling cavity of the present invention, and fig. 2B is a schematic view after the material B is injected into the sealing ring filling cavity of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, the sealing ring comprises a sealing ring base body 1 and a filling cavity 2 arranged in the sealing ring base body 1; the sealing ring base body 1 is of an integrated structure.
The filling cavity 2 is filled with a proper amount of material A in the production and processing process, and a certain shape and pressure are kept; when the sealing ring is installed, the sealing lip is in clearance fit with the piston rod 3.
And after the sealing ring is installed, a proper amount of material B is injected into the filling cavity 2, the material B reacts with the material A to form a solid material C with certain elasticity, and the material C is filled in the whole filling cavity and expands in volume, so that the sealing lip is in interference fit with the piston rod, and the sealing effect of the sealing ring is achieved.
The inner wall of the filling cavity 2 is coated with a layer of polyethylene plastic film 4.
The sealing ring base body 1 is made of nitrile rubber.
The material C is solid, expandable, and has a certain elasticity and strength.
The inner wall of the filling cavity 2 is coated with a layer of polyethylene plastic film 4.
The sealing ring base body 1 is made of nitrile rubber.
The material A is high water absorption resin (SAP), the material B is water (H)2O)。
The injection mode of the material B is needle tube injection.
Fig. 2a shows a schematic view of the sealing ring after installation without injecting material B, at this time, material a is injected into the filling cavity 2, and the filling cavity has compressibility, the sealing lip and the piston rod 3 are in clearance fit, and the clearance dimension is d 1.
Fig. 2B is a schematic view of the sealing ring after the material B is injected after the sealing ring is mounted, at this time, the material C formed in the filling cavity 2 fills the filling cavity 2, so that the sealing ring expands and has an increased volume, the sealing lip and the piston rod 3 are in interference fit, and the deformation of the sealing ring is d 2.
The working principle of the invention is as follows:
in the production and processing process of the sealing ring, a proper amount of material A is injected into the filling cavity 2, the filling cavity 2 is not filled with the material A, and the filling cavity 2 is guaranteed to have certain compressibility. When the sealing element is installed, the sealing element is easy to install due to high compressibility of the sealing element, and the sealing lip is in clearance fit with the piston rod 3 after the installation is finished, so that the sealing lip is not abraded in the installation period.
After the sealing ring is installed, a proper amount of material B is injected into the filling cavity 2, and the material B reacts with the material A to form a material C which is filled in the filling cavity 2. The material C is solid, expands in volume until being filled with the filling cavity 2, has certain elasticity and strength, enables the sealing ring to expand and increase in volume, and enables the sealing lip and the piston rod 3 to form interference fit. According to the material property of the material C, the sealing element can be ensured to achieve a normal sealing effect under a normal working condition. Because the seal lip is not abraded during installation, the reliability of the sealing element can be effectively improved, the service life of the sealing element is prolonged, and the harm to the seal lip in the installation process is reduced.
Claims (5)
1. A method for preventing the abrasion of sealing lip during installing sealing ring features that an expandable sealing ring is used, the expandable sealing ring comprises a sealing ring base body (1) and a filling cavity (2) arranged in the sealing ring base body (1), the sealing ring base body (1) is of an integral structure, the filling cavity (2) is also annular and is concentric with the sealing ring base body (1), characterized in that the filling chamber (2) is filled with a material A during the production process, the filling chamber (2) is not filled with the material A, the lower end of the sealing ring base body (1) is provided with a sealing lip, the sealing lip is in clearance fit with the piston rod (3) during installation, after the installation is finished, and injecting a material B into the filling cavity (2), wherein the material B reacts with the material A to form a material C which is filled in the whole filling cavity (2), so that the sealing ring expands and the volume is increased, and the sealing lip and the piston rod (3) form interference fit.
2. Method for avoiding the wear of the sealing lips during the installation of a sealing ring according to claim 1, characterized in that the inner wall of the filling chamber (2) is coated with a polyethylene plastic film.
3. The method for avoiding abrasion of the seal lip during installation of the seal ring according to claim 1, wherein the material A is a super absorbent resin, the material B is water, and the material C is a solid.
4. The method for avoiding the abrasion of the sealing lip during the installation of the sealing ring according to claim 1, wherein the material B is injected by a needle tube.
5. The method for avoiding the abrasion of the sealing lip during the installation of the sealing ring according to claim 1, wherein the sealing ring base body (1) is nitrile rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810403262.0A CN108591477B (en) | 2018-04-28 | 2018-04-28 | Method for preventing seal lip from being worn during installation of seal ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810403262.0A CN108591477B (en) | 2018-04-28 | 2018-04-28 | Method for preventing seal lip from being worn during installation of seal ring |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108591477A CN108591477A (en) | 2018-09-28 |
| CN108591477B true CN108591477B (en) | 2019-12-24 |
Family
ID=63619271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810403262.0A Expired - Fee Related CN108591477B (en) | 2018-04-28 | 2018-04-28 | Method for preventing seal lip from being worn during installation of seal ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108591477B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112696496B (en) * | 2020-12-14 | 2022-06-17 | 珠海格力电器股份有限公司 | Oil seal structure and motor |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3414180A1 (en) * | 1984-04-14 | 1985-10-24 | Georg Prinzing GmbH & Co KG Betonformen- und Maschinenfabrik, 7902 Blaubeuren | Sealing device for abutting components which are at least approximately pipe-shaped, in particular for concrete mouldings |
| CN86205465U (en) * | 1986-07-29 | 1987-08-26 | 宋玉泉 | Self-adjustable seal ring |
| DE102009046975B4 (en) * | 2009-11-23 | 2021-08-19 | Robert Bosch Gmbh | Sealing ring, especially for a hydraulic piston pump |
| US8292301B1 (en) * | 2011-07-18 | 2012-10-23 | Gilstad Dennis W | Multifunction ring |
| CN104265901B (en) * | 2014-08-18 | 2016-08-24 | 常熟市董浜镇徐市盛峰液压配件厂 | Enclosure seal circle |
-
2018
- 2018-04-28 CN CN201810403262.0A patent/CN108591477B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN108591477A (en) | 2018-09-28 |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| 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: 20191224 Termination date: 20200428 |