EP0339083A4 - A pair of seal members of hard material having a low friction coefficient - Google Patents
A pair of seal members of hard material having a low friction coefficientInfo
- Publication number
- EP0339083A4 EP0339083A4 EP19890900406 EP89900406A EP0339083A4 EP 0339083 A4 EP0339083 A4 EP 0339083A4 EP 19890900406 EP19890900406 EP 19890900406 EP 89900406 A EP89900406 A EP 89900406A EP 0339083 A4 EP0339083 A4 EP 0339083A4
- Authority
- EP
- European Patent Office
- Prior art keywords
- pair
- seal members
- seal
- seal member
- hard material
- 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.)
- Withdrawn
Links
- 239000000463 material Substances 0.000 title claims description 39
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 13
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 8
- 239000012530 fluid Substances 0.000 claims description 6
- 239000010410 layer Substances 0.000 claims description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000003575 carbonaceous material Substances 0.000 claims description 2
- 229910010293 ceramic material Inorganic materials 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims description 2
- 239000011247 coating layer Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 150000001247 metal acetylides Chemical class 0.000 claims description 2
- 150000004767 nitrides Chemical class 0.000 claims description 2
- 238000005475 siliconizing Methods 0.000 claims description 2
- 229920002994 synthetic fiber Polymers 0.000 claims description 2
- 238000007740 vapor deposition Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000005229 chemical vapour deposition Methods 0.000 description 3
- 238000005240 physical vapour deposition Methods 0.000 description 3
- 238000000151 deposition Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005234 chemical deposition Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000005289 physical deposition Methods 0.000 description 1
- 230000000135 prohibitive effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
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
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/3496—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member use of special materials
-
- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K25/00—Details relating to contact between valve members and seats
- F16K25/005—Particular materials for seats or closure elements
Definitions
- the present invention relates to the seal members of hard material of the type in which the seal is a result of the precise finishing of the seal members. These seal members are movable and are in direct mutual contact without the interposition of a pliable gasket.
- the small plates of hard material used in the regulation of the fluid flow in faucets are usually made with oxide or silicates of sintered aluminum and then finished until reflective with a roughness of approximately 0.2 to 0.4 microns. Because of this precise surfacing treatment, such small plates are suitable for the efficient regulation of the flow of water. In addition, because of their hardness, which is on the order of 23,000 N/mm, they last a long time and are able to withstand foreign material, even hard material such as granules of sand, which come in contact with them, without causing damages.
- the present invention overcomes the disadvantages of the prior known cooperating seal members of the type used in faucets by developing a seal in which an increase in the friction coefficient between the seal members is prevented even after extended exposure to heat.
- the cooperating seal members embodying the present invention generally comprises one seal member made of a silicon carbide and the other seal member made of a base material which has a moderate hardness and then coated with a thin layer of material of greater hardness applied through physical or chemical vapor deposition.
- the first seal member made from silicon carbide can be manufactured through a sinterization process, an infiltration process and/or a chemical reaction process.
- a particularly advantageous process of manufacturing the first seal is the Lagan process in which the silicon carbide member is obtained by submitting a semi-finished form of carbonaceous material to siliconizing at high temperatures. Precision configurations for the plates can be obtained economically since the carbonaceous semi-finished form is easy to work with and the siliconization does not deform or alter the member.
- the second seal member includes silicon carbide, metallic carbides and nitrides, and carbon with a cubic crystallographic lattice.
- Various processes are known for physical and chemical vapor deposition adaptable to silicon carbide and the other materials.
- the second seal member is made with a material of moderate hardness and coated with a material of increased hardness through chemical or physical vapor deposition.
- the second seal member need not be as resistant to erosion and wear.
- the material which forms the body of the seal forms only a support while the ability of the seal to cooperate with the other seal member is a result of the harder coating material.
- the second seal member may be made of a material which although adequate to receive the necessary finish and retain its shape during use would be unacceptable by itself to form a seal member. Examples of such a material include soapstone, ceramic materials of modest quality, metals and certain synthetic materials.
- the second plate which receives the deposition material of elevated hardness can be ground or finished to a high grade of finish before the coating layer.
- a base material should be chosen which is hard enough to receive the finishing operation but not so hard as to make this operation difficult or expensive or such that special equipment and technologies are required.
- An advantage of covering the seal members with silicon carbide is the chemical stability of the compound and the ability to resist corrosion and wear caused by the water. Silicon carbide also shows exceptional resistance to oxidation. Similar characteristics can also be found in alternative materials such as titanium carbide and carbon with a cubic crystallographic lattice. The latter material, which is not suitable to form the body of the seal member, is advantageous because of its reduced friction coefficient (appr. 0.02).
- the application of the invention assures the free and smooth movement of an apparatus utilizing such seal members without the need for lubricants. The smooth operation will last over extended periods of time and is not affected by high temperatures. Moreover, the cost of manufacturing the seals described herein is equivalent to other known processes.
- This invention is particularly useful in faucets and valves of the type having a pair of cooperating seal plates, of the type having three cooperating discs, or of the type having a single plate cooperating with cylindrical seal members. Nevertheless, the application of the present invention is not limited to faucets and valves and alternatively the seal members can be used in industrial valves, the valves and small plates for fuel injection pumps of diesel engines and so on.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding Valves (AREA)
- Mechanical Sealing (AREA)
- Sealing Devices (AREA)
- Lift Valve (AREA)
- Multiple-Way Valves (AREA)
- Ceramic Products (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT8767954A IT1211509B (it) | 1987-11-10 | 1987-11-10 | Coppia di organi di tenuta in materiale duro avente basso coefficiente di attrito |
| IT6795487 | 1987-11-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0339083A1 EP0339083A1 (de) | 1989-11-02 |
| EP0339083A4 true EP0339083A4 (en) | 1990-12-05 |
Family
ID=11306680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19890900406 Withdrawn EP0339083A4 (en) | 1987-11-10 | 1988-10-13 | A pair of seal members of hard material having a low friction coefficient |
Country Status (11)
| Country | Link |
|---|---|
| EP (1) | EP0339083A4 (de) |
| JP (1) | JP2568712B2 (de) |
| CA (1) | CA1338111C (de) |
| CH (1) | CH674556A5 (de) |
| DE (1) | DE3890961C2 (de) |
| DK (1) | DK302489A (de) |
| ES (1) | ES2011692A6 (de) |
| FI (1) | FI892959A (de) |
| GB (1) | GB2232458B (de) |
| IT (1) | IT1211509B (de) |
| WO (1) | WO1989004433A1 (de) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3829506A1 (de) * | 1988-08-31 | 1990-03-08 | Berchem & Schaberg Gmbh | Absperrventil, insbesondere regelabsperrventil, fuer rohrleitungen |
| DE3832692A1 (de) * | 1988-09-27 | 1990-03-29 | Leybold Ag | Dichtungselement mit einem absperrkoerper aus einem metallischen oder nichtmetallischen werkstoff und verfahren zum auftragen von hartstoffschichten auf den absperrkoerper |
| JPH04165170A (ja) * | 1990-06-29 | 1992-06-10 | Tokyo Yogyo Co Ltd | 水栓バルブ部材 |
| JPH068871U (ja) * | 1990-12-26 | 1994-02-04 | 京セラ株式会社 | セラミックディスクバルブ |
| GB9411228D0 (en) * | 1994-06-04 | 1994-07-27 | Camco Drilling Group Ltd | A modulated bias unit for rotary drilling |
| JP3217696B2 (ja) * | 1996-04-26 | 2001-10-09 | 京セラ株式会社 | ディスクバルブ |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1986004658A1 (en) * | 1985-02-12 | 1986-08-14 | Gevipi A.G. | Hard material seal members having a low friction coefficient |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3601413A (en) * | 1969-07-18 | 1971-08-24 | Texas Instruments Inc | Mechanical seal |
| DE2356326C2 (de) * | 1973-11-10 | 1984-01-12 | Ideal-Standard Gmbh, 5300 Bonn | Sanitäres Wasserventil |
| DE2926080A1 (de) * | 1979-06-28 | 1981-01-08 | Philips Patentverwaltung | Mittel zur trockenschmierung |
| DE3246361A1 (de) * | 1982-02-27 | 1983-09-08 | Philips Patentverwaltung Gmbh, 2000 Hamburg | Kohlenstoff enthaltende gleitschicht |
| JPS58186253U (ja) * | 1982-06-07 | 1983-12-10 | 日本ピストンリング株式会社 | 回転シ−ル |
| IT1212662B (it) * | 1982-06-11 | 1989-11-30 | Gevipi Ag | Coppia di piastrine in materiale duro aventi basso coefficiente di attrito per rubinetti |
| US4391450A (en) * | 1982-08-30 | 1983-07-05 | Electrochemical Technology Corp. | Shaft seal resistant to electrokinetic corrosion |
| US4522412A (en) * | 1982-10-26 | 1985-06-11 | Keikoku Piston Ring Co., Ltd. | Oil ring with coil expander |
| DE3347135C2 (de) * | 1983-12-27 | 1986-04-03 | Ideal-Standard Gmbh, 5300 Bonn | Durchgangs- oder Mehrwege-Ventil in Plattenbauweise |
| DE3509572C1 (de) * | 1985-03-16 | 1986-07-10 | Feldmühle AG, 4000 Düsseldorf | Mit keramischen Werkstoffkomponenten beschichtetes Gleitelement und seine Verwendung |
| DE3528934A1 (de) * | 1985-08-13 | 1987-02-26 | Feldmuehle Ag | Gleitelement aus keramischem werkstoff |
| DE3538261A1 (de) * | 1985-10-28 | 1987-04-30 | Battelle Institut E V | Gegeneinander abdichtende ventilelemente fuer mischarmaturen |
| US4628969A (en) * | 1985-12-20 | 1986-12-16 | Mallinckrodt, Inc. | Method of producing prefilled sterile plastic syringes |
-
1987
- 1987-11-10 IT IT8767954A patent/IT1211509B/it active
-
1988
- 1988-10-13 GB GB8913616A patent/GB2232458B/en not_active Expired
- 1988-10-13 WO PCT/US1988/003559 patent/WO1989004433A1/en not_active Application Discontinuation
- 1988-10-13 CH CH2488/89A patent/CH674556A5/fr not_active IP Right Cessation
- 1988-10-13 JP JP1500129A patent/JP2568712B2/ja not_active Expired - Lifetime
- 1988-10-13 EP EP19890900406 patent/EP0339083A4/en not_active Withdrawn
- 1988-10-13 DE DE3890961A patent/DE3890961C2/de not_active Expired - Lifetime
- 1988-11-08 ES ES8803395A patent/ES2011692A6/es not_active Expired - Lifetime
- 1988-11-09 CA CA000582589A patent/CA1338111C/en not_active Expired - Fee Related
-
1989
- 1989-06-16 FI FI892959A patent/FI892959A/fi not_active Application Discontinuation
- 1989-06-19 DK DK302489A patent/DK302489A/da unknown
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1986004658A1 (en) * | 1985-02-12 | 1986-08-14 | Gevipi A.G. | Hard material seal members having a low friction coefficient |
Also Published As
| Publication number | Publication date |
|---|---|
| FI892959A0 (fi) | 1989-06-16 |
| FI892959A (fi) | 1989-06-16 |
| GB2232458A (en) | 1990-12-12 |
| GB8913616D0 (en) | 1990-08-01 |
| JPH02502749A (ja) | 1990-08-30 |
| CA1338111C (en) | 1996-03-05 |
| JP2568712B2 (ja) | 1997-01-08 |
| EP0339083A1 (de) | 1989-11-02 |
| IT8767954A0 (it) | 1987-11-10 |
| ES2011692A6 (es) | 1990-02-01 |
| IT1211509B (it) | 1989-11-03 |
| DE3890961C2 (de) | 1999-06-10 |
| GB2232458B (en) | 1992-01-22 |
| CH674556A5 (fr) | 1990-06-15 |
| WO1989004433A1 (en) | 1989-05-18 |
| DK302489D0 (da) | 1989-06-19 |
| DK302489A (da) | 1989-06-19 |
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| EP2136116B1 (de) | Armatur | |
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| US5032215A (en) | Method of etching ceramic frictional or sealing elements | |
| JP3677392B2 (ja) | フォーセットバルブ |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 19890731 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): FR |
|
| A4 | Supplementary search report drawn up and despatched |
Effective date: 19901018 |
|
| AK | Designated contracting states |
Kind code of ref document: A4 Designated state(s): FR |
|
| 17Q | First examination report despatched |
Effective date: 19920817 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 19921229 |