SE470140B - Shaft seal for sealing a liquid medium - Google Patents
Shaft seal for sealing a liquid mediumInfo
- Publication number
- SE470140B SE470140B SE8804472A SE8804472A SE470140B SE 470140 B SE470140 B SE 470140B SE 8804472 A SE8804472 A SE 8804472A SE 8804472 A SE8804472 A SE 8804472A SE 470140 B SE470140 B SE 470140B
- Authority
- SE
- Sweden
- Prior art keywords
- liquid medium
- medium
- sealing
- shaft
- liquid
- Prior art date
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
-
- 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
- F16J15/3244—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with hydrodynamic pumping action
-
- 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
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Sealing With Elastic Sealing Lips (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Description
470 140 2 enligt uppfinningen genom de :L patentkravet 1. angivna känne- tecknande särdragen. 470 140 2 according to the invention by the characterizing features stated in claim 1.
Genom den mycket spetsiga konvinkeln äger det således enligt uppfinningen rum ett medvetet infört läckage av vatten genom spalten mellan tätningslist och axel, genom vilket läckage säkerställas att smörjningen är tillräcklig trots vattnets dåliga smörjegenskaper.Due to the very acute cone angle, according to the invention, a deliberately introduced leakage of water takes place through the gap between the sealing strip and the shaft, through which leakage is ensured that the lubrication is sufficient despite the poor lubrication properties of the water.
Läckvattnets inträde i den gasförande kammaren kommer härvid inte att ha någon betydande negativ inverkan eftersom läck- vattnet utan svårighet kan avlägsnas genom relativt enkla och kända matningsanordningar.The entry of the leakage water into the gas-carrying chamber will not have a significant negative effect here, since the leakage water can be removed without difficulty through relatively simple and known feeding devices.
Den lilla konvinkeln av högst 12 grader verkar därigenom för den avsedda matningen, eftersom en tryckkil bildas mellan axeln och konan, vilken hydrodynamiskt "trycker ut" (ty. auf- schwimmt), dvs utvidgar tätningsläppen och således inleder det avsedda läckaget till den gasförande kammaren.The small cone angle of not more than 12 degrees thereby acts for the intended feed, since a pressure wedge is formed between the shaft and the cone, which hydrodynamically "pushes out" (ie auf-schwimmt), ie widens the sealing lip and thus initiates the intended leakage into the gas-bearing chamber .
Visserligen är läpp-ringtätningar redan kända (DE-AS l 248 399), vid vilka en mycket spetsig konvinkel av 4 grader till 8 grader används, men där rör det sig emellertid inte om en driftsmässig kona, utan om en kona som före monteringen föreligger vid tät- ningsläppen, som i driftstillståndet avlägsnas genom den elastiska deformeringen mot axeln och som endast har sin verkan vad beträffar presstrycket.Although lip ring seals are already known (DE-AS 1 248 399), in which a very pointed cone angle of 4 degrees to 8 degrees is used, but this is not an operational cone, but a cone which is present before mounting. at the sealing lip, which in the operating condition is removed by the elastic deformation against the shaft and which has its effect only with respect to the press pressure.
Enligt en utföringsform av föremålet för uppfinningen är det så anordnat att, vid ytan av det konliknande utsprânget är hydrodynamiskt verkande matningsspår anbringade, vilka är så utformade att de matar det flytande mediet från mediet med högre tryck till mediet med lägre tryck.According to an embodiment of the object of the invention, it is so arranged that, at the surface of the cone-like projection, hydrodynamically acting feed grooves are arranged, which are designed so as to feed the liquid medium from the higher-pressure medium to the lower-pressure medium.
Härigenom understödjes och förstärks det åsyftade medieflödet i riktning mot det gasformiga mediet, vilket är önskvärt under bestämda förutsättningar. '-\ s 470 140 Vidare är det så anordnat att matningsspåren är formade såsom en gänga med i riktning mot tätningslisten riktad stigning, och att matningsspåren omsluter utsprängets omkrets med åtmin- stone en gänga.In this way, the intended media flow is supported and amplified in the direction of the gaseous medium, which is desirable under certain conditions. 470 140 Furthermore, it is arranged that the feed grooves are shaped as a thread with a pitch directed in the direction of the sealing strip, and that the feed grooves enclose the circumference of the projection with at least one thread.
Härigenom har man på enkelt sätt möjlighet att anpassa mat- ningsspårens matningsintensitet efter de vid varje tillfälle förekommande lokala kraven, genom att man på motsvarande sätt varierar gängans stigning.In this way, it is possible in a simple manner to adapt the feed intensity of the feed grooves to the local requirements that occur at each occasion, by varying the pitch of the thread in a corresponding manner.
Pâ ritningen illustreras uppfinningsföremålet schematiskt. På ritningen visar, vardera i tvärsnitt, Pig. l en tätningsläpp enligt uppfinningen utan matningsspår, fig. 2 en tätningsläpp enligt uppfinningen xnad matningsspår, och fig. 3 en tätningsanordning med två axiellt efter varandra anordnade tätningsläppar.The drawing schematically illustrates the object of the invention. The drawing shows, each in cross section, Pig. Fig. 2 shows a sealing lip according to the invention without feed grooves, Fig. 2 shows a sealing lip according to the invention as feed grooves, and Fig. 3 shows a sealing device with two sealing lips arranged axially one after the other.
Den i fig. l illustrerade tätningsläppen uppvisar en inspän- ningsdel l, ett liv 2 och en läppdel 3. Läppdelen 3 ligger an mot axeln 7 med en tätningslist 4 vilken i föreliggande ut- föringsexempel bildar en avrundad kant. Från denna tätnings- list 4 sträcker sig ett konliknande ringutsprâng 5 i riktning mot mediet W som skall tätas, vilket ringutsprång tillsammans med axeln 7 bildar en mycket spetsig vinkeløfi. Det konliknande ringutspränget 5 är utformat slätt vid sin mot axeln 7 vända yta. Vid den mot det gasformiga mediet G vända sidan är läpp- delen 3 likaledes utformad konisk. Denna kona, vilken i axiell riktning är väsentligt kortare än den mot det flytande mediet vända konan, har inte någon betydelse för läppdelens funktion enligt uppfinningen.The sealing lip illustrated in Fig. 1 has a clamping part 1, a web 2 and a lip part 3. The lip part 3 abuts against the shaft 7 with a sealing strip 4 which in the present exemplary embodiment forms a rounded edge. Extending from this sealing strip 4 is a cone-like ring projection 5 in the direction of the medium W to be sealed, which ring projection together with the shaft 7 forms a very pointed angular island fi. The cone-like ring projection 5 is formed smoothly at its surface facing the shaft 7. At the side facing the gaseous medium G, the lip part 3 is likewise designed conically. This cone, which in the axial direction is substantially shorter than the cone facing the liquid medium, has no significance for the function of the lip part according to the invention.
Den i fig. 2 illustrerade tätningsläppen består av samma kom- ponenter som tätningsläppen enligt fig. 1, med det enda undan- taget att det konliknande ringutsprånget 5 vid sin mot axeln 7 4270 140 4 vända konyta 5 är utrustat med matningsspår 6 i form av en multipelgänga.The sealing lip illustrated in Fig. 2 consists of the same components as the sealing lip according to Fig. 1, with the only exception that the cone-like ring projection 5 at its cone 5 facing the shaft 7 is equipped with feed grooves 6 in the form of a multiple thread.
Av fig. 3 framgår att tätningsläpparna enligt uppfinningen inte endast kan insättas såsom enkeltätningar, utan även kan insättas i tätningsanordningar av konventionell konstruktion, med två eller flera på avstånd efter varandra anordnade tät- ningsläppar. I den illustrerade tätningsanordningen är den tätningsläpp som är anordnad intill det medium W som skall tätas, betecknad med l, 4, 5 och är den till det gasformiga mediet angränsande tätningsläppen betedknad med l', 4', 5'.It can be seen from Fig. 3 that the sealing lips according to the invention can not only be inserted as single seals, but can also be inserted into sealing devices of conventional construction, with two or more sealing lips arranged at a distance from one another. In the illustrated sealing device, the sealing lip arranged next to the medium W to be sealed is denoted by 1, 4, 5 and the sealing lip adjacent to the gaseous medium is denoted by 1 ', 4', 5 '.
Claims (3)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3742080A DE3742080C2 (en) | 1987-12-11 | 1987-12-11 | Shaft seal for sealing a liquid medium |
Publications (3)
Publication Number | Publication Date |
---|---|
SE8804472D0 SE8804472D0 (en) | 1988-12-09 |
SE8804472L SE8804472L (en) | 1989-06-12 |
SE470140B true SE470140B (en) | 1993-11-15 |
Family
ID=6342410
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE8804472A SE470140B (en) | 1987-12-11 | 1988-12-09 | Shaft seal for sealing a liquid medium |
Country Status (8)
Country | Link |
---|---|
JP (1) | JPH0814321B2 (en) |
KR (1) | KR0121287B1 (en) |
CN (1) | CN1015817B (en) |
AU (1) | AU609910B2 (en) |
DE (1) | DE3742080C2 (en) |
GB (1) | GB2213540B (en) |
NL (1) | NL193289C (en) |
SE (1) | SE470140B (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3800706C2 (en) * | 1988-01-13 | 1994-09-01 | Blohm Voss Ag | Kit for a shaft seal, especially on a stern tube of a ship |
DE4125498A1 (en) * | 1991-08-01 | 1993-02-04 | Leybold Ag | Shaft seal for through passage in vacuum plants - has sealing part forming ring gap containing locking fluid |
DE4141999C2 (en) * | 1991-12-19 | 1997-06-12 | Blohm Voss Ag | Lip seal for sealing a shaft, especially a ship propeller shaft |
DE9213373U1 (en) * | 1992-10-05 | 1994-02-10 | Martin Merkel GmbH & Co KG, 21107 Hamburg | Shaft sealing ring with a sealing lip |
DE10019994A1 (en) | 2000-04-22 | 2001-10-31 | Freudenberg Carl Fa | Radial seal for shaft comprises annular metal base which carries rubber ring with sealing lip pressed against shaft by spiral spring, working planes of sealing lip and spring being different before seal is fastened in place |
FR2939836B1 (en) * | 2008-12-12 | 2015-05-15 | Snecma | SEAL FOR PLATFORM SEAL IN A TURBOMACHINE ROTOR |
DE102011107735A1 (en) * | 2010-09-29 | 2012-03-29 | Carl Freudenberg Kg | Oil seal for radial rotary shaft arrangement, has middle guard lip that is provided in position between seal lips along axial direction |
DE102011018584A1 (en) * | 2011-04-11 | 2012-10-11 | Blohm + Voss Industries Gmbh | Seal for sealing waves |
DE102011102477A1 (en) | 2011-05-24 | 2012-11-29 | Blohm + Voss Industries Gmbh | seal |
DE102012006125A1 (en) | 2012-03-20 | 2013-09-26 | Blohm + Voss Industries Gmbh | Sealing ring for sealing e.g. propeller shaft of ship against water, has sealing edge made of wear resistance material, and clamping element and membrane applied with high elasticity material, where materials are bonded by vulcanization |
CN103742651B (en) * | 2014-01-29 | 2016-11-16 | 烟台润蚨祥油封有限公司 | A kind of low friction reciprocating movement sealing part |
KR101579957B1 (en) | 2015-03-03 | 2015-12-28 | 한국에스케이에프씰 주식회사 | Engine oil seal of friction reducing type |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE729128C (en) * | 1938-02-27 | 1942-12-10 | Freudenberg Carl Fa | Seal made of elastic material for rotating shafts or rods going back and forth |
DE884262C (en) * | 1943-07-25 | 1953-07-27 | Voith Gmbh J M | Seal with an artificial rubber sleeve |
DE1101074B (en) * | 1957-08-20 | 1961-03-02 | Kupfer Asbest Co | Shaft seal |
DE1248399B (en) * | 1962-12-04 | 1967-08-24 | Gen Motors Corp | Lip ring seal for shafts |
GB1110218A (en) * | 1964-09-24 | 1968-04-18 | Angus George Co Ltd | Improvements in shaft seals |
DE1525882B2 (en) * | 1965-11-29 | 1971-07-01 | Stensholrns Fabnks Aktiebolag, Landskrena (Schweden) | OIL SEAL |
JPS446570Y1 (en) * | 1967-10-18 | 1969-03-11 | ||
US3625523A (en) * | 1970-02-13 | 1971-12-07 | Waukesha Bearings Corp | Aft sealing assembly for stern tubes |
AU482420B2 (en) * | 1972-04-10 | 1974-10-10 | Brake And Clutch Industries Australia Pty. Ltd. | IMPROVED FLUID SEAL Specification |
JPS5552135Y2 (en) * | 1974-12-18 | 1980-12-03 | ||
DE7902243U1 (en) * | 1979-01-27 | 1979-12-06 | Howaldtswerke-Deutsche Werft Ag Hamburg Und Kiel, 2300 Kiel | HYDRODYNAMIC LIP SEAL |
DE3307470C1 (en) * | 1983-03-03 | 1991-03-28 | Fa. Carl Freudenberg, 6940 Weinheim | Sealing ring |
JPS60185764U (en) * | 1984-05-21 | 1985-12-09 | エヌオーケー株式会社 | oil seal |
DE3524461A1 (en) * | 1985-07-09 | 1987-01-22 | Kaco Gmbh Co | RADIAL SHAFT SEAL |
DE3526424C1 (en) * | 1985-07-24 | 1987-02-12 | Fa. Carl Freudenberg, 6940 Weinheim | Radial shaft seal and process for its manufacture |
GB2179408A (en) * | 1985-08-20 | 1987-03-04 | Angus George Co Ltd | Oil seal with pumping action |
DE3612330C1 (en) * | 1986-04-11 | 1987-06-04 | Freudenberg Carl Fa | Sealing ring |
AU7741487A (en) * | 1987-08-25 | 1989-03-02 | Atsugi Motor Parts Company, Limited | Seal structure for rotary body and vane-type rotary compressor employing the same |
-
1987
- 1987-12-11 DE DE3742080A patent/DE3742080C2/en not_active Expired - Lifetime
-
1988
- 1988-12-05 AU AU26576/88A patent/AU609910B2/en not_active Expired
- 1988-12-06 JP JP63308705A patent/JPH0814321B2/en not_active Expired - Lifetime
- 1988-12-06 GB GB8828438A patent/GB2213540B/en not_active Expired - Lifetime
- 1988-12-09 NL NL8803034A patent/NL193289C/en active Search and Examination
- 1988-12-09 SE SE8804472A patent/SE470140B/en not_active IP Right Cessation
- 1988-12-10 CN CN88109215A patent/CN1015817B/en not_active Expired
- 1988-12-10 KR KR1019880016424A patent/KR0121287B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
CN1035711A (en) | 1989-09-20 |
GB8828438D0 (en) | 1989-01-05 |
NL193289B (en) | 1999-01-04 |
SE8804472D0 (en) | 1988-12-09 |
GB2213540A (en) | 1989-08-16 |
AU2657688A (en) | 1989-06-15 |
NL193289C (en) | 1999-05-06 |
DE3742080C2 (en) | 1994-07-07 |
SE8804472L (en) | 1989-06-12 |
AU609910B2 (en) | 1991-05-09 |
NL8803034A (en) | 1989-07-03 |
GB2213540B (en) | 1991-10-16 |
KR0121287B1 (en) | 1997-12-26 |
JPH0814321B2 (en) | 1996-02-14 |
JPH01193466A (en) | 1989-08-03 |
CN1015817B (en) | 1992-03-11 |
DE3742080A1 (en) | 1989-06-22 |
KR890010436A (en) | 1989-08-08 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
NAL | Patent in force |
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NUG | Patent has lapsed |