GB2063389A - Seal - Google Patents

Seal Download PDF

Info

Publication number
GB2063389A
GB2063389A GB8030924A GB8030924A GB2063389A GB 2063389 A GB2063389 A GB 2063389A GB 8030924 A GB8030924 A GB 8030924A GB 8030924 A GB8030924 A GB 8030924A GB 2063389 A GB2063389 A GB 2063389A
Authority
GB
United Kingdom
Prior art keywords
seal
sealing edge
rubber
antifriction coating
antifriction
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.)
Granted
Application number
GB8030924A
Other versions
GB2063389B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of GB2063389A publication Critical patent/GB2063389A/en
Application granted granted Critical
Publication of GB2063389B publication Critical patent/GB2063389B/en
Expired legal-status Critical Current

Links

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
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3284—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structure; Selection of materials

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Material Composition (AREA)
  • Sealing With Elastic Sealing Lips (AREA)
  • Gasket Seals (AREA)

Abstract

A seal has a base (1) made of rubber and a sealing edge (2) with an antifriction coating (3) provided on its surface; this coating is made of fluoroorganic compounds chemically bonded with the base (1) and has a thickness of from 10<-2> to 1.0 mu m. The seal may be used in hermetic joints, e.g. in packing assemblies of automobile units, sealing members of pumps. <IMAGE>

Description

SPECIFICATION Seal The present invention relates to the manufacture of industrial rubber goods and, more specifically, to seals.
The present invention is useful in any branch of mechanical engineering and instrument making, where it is required to ensure reliability and a long service life of sealing joints, e.g. in the structures of packing assemblies of automobile units, sealing members of pumps, compressors.
The seals can be used in stationary and mobile devices of a wide range of machines and instruments, as well as in bearings and other friction units.
A low friction and chemical inactivity of the working surface of the seals completely eliminates adherence of rubber to a metal in air, vacuum and water.
In mechanical control systems the use of such seals makes it possible to considerably enhance reliability and sensitivity of these systems.
Known in the art is a polytetrafluoroethylene seal comprising at least one sealing edge (cf.
USSR Inventor's Certificate No. 1 83078 Cl. F 16 j 1 5/20, 1 964).
This seal possesses a low friction coefficient, but its sealing power is rather small due to a low elasticity.
Known is also a seal having a base made of rubber and at least one sealing edge with an antifriction coating provided on its surface (cf.
USSR Inventor's Certificate No. 227807 Cl. F 16 j 15/20,1965).
This seal does not provide for the required level of antifriction properties, i.e. it possesses insufficient wear-resistance due to a high coefficient of friction of the surface of the antifriction coating on the sealing edge.
Manufacture of known seals with an antifriction coating entails an impaired elasticity on the whole, since any antifriction coating has a thickness considerably higher than the height of micro-roughness on the rubber surface and it is made from a material with a greater hardness than rubber. Increased hardness of the superficial layer ensures lowering of the coefficient of friction of the seal upon operation in pair with a metal due to a decreased area of the actual contact.
However, at the same time, increasing hardness of the superficiai layer also causes lowering elasticity of the seal as a whole and, hence, to a reduced sealing power thereof.
It is an object of the present invention to provide a seal which would make it possible to lower the friction coefficient of the sealing edge surface without changing its elasticity on the whole.
This object is accomplished by that in a seal having a base made of rubber and at least one sealing edge with an antifriction coating available on its surface, in accordance with the present invention said antifriction coating of the sealing edge is made from fluoroorganic compounds chemically combined with the base and has a thickness of from 10-2 to 1.0 ym.
The present invention makes it possible to enhance productivity of machines and apparatus, for example, to prolong the service life of packing assemblies of automobile units, ensure a longer service life of hermeticity of casings of household watches.
The present invention is further explained by the following specific embodiment thereof with reference to t:-e accompanying drawing showing a general view of the seal according to the present invention, in elevation.
The seal has a rubber base 1 and at least one sealing edge 2 with an antifriction surface 3 on its surface.
The antifriction 3 of the sealing edge 2 is made from fluoroorganic compounds such as fluoroderivatives of acrylic acid chemically bonded with the base 1 and having a thickness of from 10-2 to 1.0 4m.
The seal is made of rubber and then antifriction coating 3 is applied using conventional techniques (cf. British Patent No. 1,120,803 Cl.
C3E, 1 965) onto the sealing edge 2 by way of radiation polymerization of the fluoroorganic compounds on its surface.
The thickness of the antifriction coating below 10-2 ym does not provide the presence of the antifriction coating on the projections around pores in the materials, thus increasing the total value of the friction coefficient of the surface of the sealing edge 2. Increasing the thickness of the antifriction coating 3 above 1.8 ieam causes a partial loss of elasticity of the seal on the whole, thus lowering its sealing power.
The chemical bond of the antifriction coating 3 of the sealing edge 2, made of fluoroorganic compounds, with rubber imparts a higher mechanical strength thereto and improves iss lubricating properties.
Therefore, the present invention makes it possible to lower the coefficient of friction of the sealing edge surface without changing elasticity of the seal on the whole.
Claims
1. A seal comprising a rubber base, at least one sealing edge provided with an antifriction coating on its surface made of fluoroorganic compounds chemically bonded with the base and having thickness of from 10-2 to 1.0,us.
2. A seal substantially as described in the Specification and the drawing attached.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (2)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Seal The present invention relates to the manufacture of industrial rubber goods and, more specifically, to seals. The present invention is useful in any branch of mechanical engineering and instrument making, where it is required to ensure reliability and a long service life of sealing joints, e.g. in the structures of packing assemblies of automobile units, sealing members of pumps, compressors. The seals can be used in stationary and mobile devices of a wide range of machines and instruments, as well as in bearings and other friction units. A low friction and chemical inactivity of the working surface of the seals completely eliminates adherence of rubber to a metal in air, vacuum and water. In mechanical control systems the use of such seals makes it possible to considerably enhance reliability and sensitivity of these systems. Known in the art is a polytetrafluoroethylene seal comprising at least one sealing edge (cf. USSR Inventor's Certificate No. 1 83078 Cl. F 16 j 1 5/20, 1 964). This seal possesses a low friction coefficient, but its sealing power is rather small due to a low elasticity. Known is also a seal having a base made of rubber and at least one sealing edge with an antifriction coating provided on its surface (cf. USSR Inventor's Certificate No. 227807 Cl. F 16 j 15/20,1965). This seal does not provide for the required level of antifriction properties, i.e. it possesses insufficient wear-resistance due to a high coefficient of friction of the surface of the antifriction coating on the sealing edge. Manufacture of known seals with an antifriction coating entails an impaired elasticity on the whole, since any antifriction coating has a thickness considerably higher than the height of micro-roughness on the rubber surface and it is made from a material with a greater hardness than rubber. Increased hardness of the superficial layer ensures lowering of the coefficient of friction of the seal upon operation in pair with a metal due to a decreased area of the actual contact. However, at the same time, increasing hardness of the superficiai layer also causes lowering elasticity of the seal as a whole and, hence, to a reduced sealing power thereof. It is an object of the present invention to provide a seal which would make it possible to lower the friction coefficient of the sealing edge surface without changing its elasticity on the whole. This object is accomplished by that in a seal having a base made of rubber and at least one sealing edge with an antifriction coating available on its surface, in accordance with the present invention said antifriction coating of the sealing edge is made from fluoroorganic compounds chemically combined with the base and has a thickness of from 10-2 to 1.0 ym. The present invention makes it possible to enhance productivity of machines and apparatus, for example, to prolong the service life of packing assemblies of automobile units, ensure a longer service life of hermeticity of casings of household watches. The present invention is further explained by the following specific embodiment thereof with reference to t:-e accompanying drawing showing a general view of the seal according to the present invention, in elevation. The seal has a rubber base 1 and at least one sealing edge 2 with an antifriction surface 3 on its surface. The antifriction 3 of the sealing edge 2 is made from fluoroorganic compounds such as fluoroderivatives of acrylic acid chemically bonded with the base 1 and having a thickness of from 10-2 to 1.0 4m. The seal is made of rubber and then antifriction coating 3 is applied using conventional techniques (cf. British Patent No. 1,120,803 Cl. C3E, 1 965) onto the sealing edge 2 by way of radiation polymerization of the fluoroorganic compounds on its surface. The thickness of the antifriction coating below 10-2 ym does not provide the presence of the antifriction coating on the projections around pores in the materials, thus increasing the total value of the friction coefficient of the surface of the sealing edge 2. Increasing the thickness of the antifriction coating 3 above 1.8 ieam causes a partial loss of elasticity of the seal on the whole, thus lowering its sealing power. The chemical bond of the antifriction coating 3 of the sealing edge 2, made of fluoroorganic compounds, with rubber imparts a higher mechanical strength thereto and improves iss lubricating properties. Therefore, the present invention makes it possible to lower the coefficient of friction of the sealing edge surface without changing elasticity of the seal on the whole. Claims
1. A seal comprising a rubber base, at least one sealing edge provided with an antifriction coating on its surface made of fluoroorganic compounds chemically bonded with the base and having thickness of from 10-2 to 1.0,us.
2. A seal substantially as described in the Specification and the drawing attached.
GB8030924A 1979-09-25 1980-09-25 Seal Expired GB2063389B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SU792810500A SU766205A1 (en) 1979-09-25 1979-09-25 Seal

Publications (2)

Publication Number Publication Date
GB2063389A true GB2063389A (en) 1981-06-03
GB2063389B GB2063389B (en) 1983-03-16

Family

ID=20846637

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8030924A Expired GB2063389B (en) 1979-09-25 1980-09-25 Seal

Country Status (4)

Country Link
DE (1) DE3036025A1 (en)
FR (1) FR2465934A1 (en)
GB (1) GB2063389B (en)
SU (1) SU766205A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2387625A (en) * 2002-04-02 2003-10-22 Gerald James Winskill A sealing ring or gasket for a pipeline joint

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1138124B (en) * 1981-07-31 1986-09-17 Intermarp Italia CHEMICAL BATH PROCEDURE FOR THE TREATMENT OF LIP SEAL RINGS
DE3630337C1 (en) * 1986-09-05 1987-10-22 Lemfoerder Metallwaren Ag Retaining ring for a sealing bellows on the tie rod of motor vehicles
DE4035657A1 (en) * 1990-11-09 1992-05-14 Baedje K H Meteor Gummiwerke METHOD FOR PRODUCING A SEALING ELEMENT

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2932535A (en) * 1955-05-31 1960-04-12 Federal Mogul Bower Bearings Shaft seals
US3322433A (en) * 1964-03-10 1967-05-30 Minnesota Rubber Co Sealing ring and method of making same
AT328815B (en) * 1973-07-25 1976-04-12 Simmerwerke Simmer Kg READY-TO-INSTALL ELASTICALLY DEFORMABLE SEAL AND METHOD FOR MANUFACTURING IT

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2387625A (en) * 2002-04-02 2003-10-22 Gerald James Winskill A sealing ring or gasket for a pipeline joint

Also Published As

Publication number Publication date
FR2465934A1 (en) 1981-03-27
GB2063389B (en) 1983-03-16
SU766205A1 (en) 1982-04-30
DE3036025A1 (en) 1981-04-09

Similar Documents

Publication Publication Date Title
JP5033873B2 (en) Slider bearing for use with equipment having a vacuum chamber
KR101492267B1 (en) Rubber/resin composite seal material
EP2677021A1 (en) Sliding material composition and sliding member
US5419970A (en) Method for making a composite aluminum article
EP1288542A3 (en) Mechanical sealing device
EP0180635A1 (en) Ferrofluid linear seal apparatus
EP1553335A1 (en) Reciprocating seal
JP2001254841A (en) Mounting structure for lip type seal
GB2063389A (en) Seal
CN108953611A (en) A kind of automobile rubber sealing ring
US4055369A (en) Seal for a spherical bearing
AU2003250356A1 (en) Flexible graphite sealing joint with metal jacket for high temperature
US4716766A (en) Method of evaluating the peel strength of the plastic sliding layer of a laminate for sliding surface bearings
JPH04331876A (en) Jacket gasket
JP2000074223A (en) Oil seal
US6887520B1 (en) Bearing component masking unit
JPH0225972Y2 (en)
US2378095A (en) Fluid seal
JP2012163216A (en) U-shaped seal
JP3435945B2 (en) Initial lubricant application method for sealing device
JPH0220533Y2 (en)
JPH11280916A (en) Rotary shaft seal
JPH11351405A (en) Sealing device
JP2000009236A (en) Oil seal
KR102299944B1 (en) Plasma coated sealing element

Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee