CH365250A - Crankshaft bearings in a two-stroke internal combustion engine with mixed fuel oil lubrication - Google Patents
Crankshaft bearings in a two-stroke internal combustion engine with mixed fuel oil lubricationInfo
- Publication number
- CH365250A CH365250A CH6386958A CH6386958A CH365250A CH 365250 A CH365250 A CH 365250A CH 6386958 A CH6386958 A CH 6386958A CH 6386958 A CH6386958 A CH 6386958A CH 365250 A CH365250 A CH 365250A
- Authority
- CH
- Switzerland
- Prior art keywords
- seals
- internal combustion
- combustion engine
- stroke internal
- fuel oil
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
- F01M9/12—Non-pressurised lubrication, or non-closed-circuit lubrication, not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F11/00—Arrangements of sealings in combustion engines
- F02F11/007—Arrangements of sealings in combustion engines involving rotary applications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F7/00—Casings, e.g. crankcases or frames
- F02F7/0021—Construction
- F02F7/0036—Casings for two-stroke engines with scavenging conduits
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C9/00—Bearings for crankshafts or connecting-rods; Attachment of connecting-rods
- F16C9/02—Crankshaft bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/02—Engines characterised by their cycles, e.g. six-stroke
- F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
- F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
-
- 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
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
- F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Rolling Contact Bearings (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Sealing Of Bearings (AREA)
- Support Of The Bearing (AREA)
Description
Kurbelwellenlager in einer Zweitaktbrennkraftmaschine mit Brennstoffö1gemischschmierung Es ist bekannt, die Wälzlager einer Kurbelwelle für eine mehrzylindrige Zweitaktbrennkraftmaschine mit Kurbelgehäusepumpe beiderseits durch Dicht elemente abzudichten. Die in die Kurbelkammer ge langten schädlichen Abgasbestandteile können auf diese Weise nicht die Lager angreifen. öl dagegen kann sich in genügender Menge in den Lagerlauf flächen halten oder infolge der Oberflächenspan nung an den Dichtringen vorbei in die Lagerlauf flächen kriechen.
Bei dieser Ausführung besteht die Möglichkeit, dass auch im öl schädliche Abgas bestandteile in die Laufflächen der Lager gelangen und zu ihrer vorzeitigen Alterung beitragen können. Aufgabe der Erfindung ist eine vollkommene Tren nung der Lagerschmierung von der Motorschmierung.
Die Erfindung geht aus von einem beiderseits durch Dichtungen abgedichteten Kurbelwellenwälzlager für Zweitaktbrennkraftmaschinen mit Brennstofföl- gemischschmierung. Das Neue besteht darin, dass das mit Schmiermittel gefüllte Lager Dichtungen zum Zu rückhalten des Schmiermittels aufweist, während es gegen die Kurbelgehäuseräume durch zusätzliche Dichtungen abgedichtet ist.
Die Abbildung zeigt eine beispielsweise Aus führung des Erfindungsgegenstandes.
Die Kurbelwelle 1 ist mit ihrem Mittelzapfen 2 über Innenringe 3, Wälzkörper 4 und Aussenring 5 im Gehäuse 6 bzw. 7 gelagert. Die Wälzkörper 4 wer den durch Dichtungen 8 und 9 so abgedichtet, dass das einmal in das Lagergefüllte Schmiermittel nicht verlorengehen kann. Gleichzeitig schützen die Dich tungen 8 und 9 in bekannter Weise die Wälzkörper bzw. die Laufbahnen am Innenring 3 und am Aussen ring 5 vor dem Zutritt von Fremdkörpern. Mit der artigen Lagern kann ohne Wartung und Reparaturen eine sehr lange Laufzeit erreicht werden.
Die Kurbel- kammern 10 und 11, die mit Abgasresten versetztes Gemisch aus Brennstoff, Luft und öl enthalten, sind durch je eine Kolbenringdichtung 12 und 13 mit Kolbenringen 14, 15 abgedichtet. Auf diese Weise treten keine Abgasbestandteile an die Dichtungen 8 und 9 und infolgedessen auch nicht an die Lauf flächen der Wälzlagerkörper 4 im Innenring 3 bzw. im Aussenring 5.
Um bei evtl. Nachlassen der Dichtwirkung der geschlitzten Ringe 14 und 15 den Druckwechsel in den Kurbelkammern 10 und 11 nicht unmittelbar auf die Dichtungen 8 und 9 wirken zu lassen und um damit das Schmiermittel aus dem Lagerinneren nicht herauszusaugen bzw. herauszudrücken, können Spalte 16, 17 zwischen den kurbelkammerseitigen Dichtungen (geschlitzten Ringen 14, 15) und den lagerseitigen Dichtungen 8 und 9 angeordnet sein. Diese bilden eine Art Puffer zum Aufnehmen und Verringern der Druckunterschiede in den Kurbel kammern 10 und 11.
Die Spalte 16, 17 lassen sich auch durch Aussparungen 18, 19 vergrössern. Ebenso wird die Pufferwirkung der Spalte 16, 17 bzw. Aussparungen 18, 19 dadurch vergrössert, d'ass in den Gehäuseteilen 6 bzw. 7 Ausnehmungen 20, 21 an geordnet sind.
Wenn die Aussparungen 20, 21 durch Bohrungen im Gehäuse 6 oder 7 mit der Aussenluft in Verbin dung stehen, ist eine weitere Verbesserung der Puf ferwirkung zwischen den kurbelkammerseitigen und den lagerseitigen Dichtungen gegeben. Sie kann noch dadurch gesteigert werden, dass die Aussparungen 20 bzw. 21 auch noch mit Leitungen zum Ansaug stutzen des Vergasers bzw. in den Zylinder in die Nähe der Ansaugfenster geleitet werden.
Auf diese Weise wird der Raum zwischen den lagerseitigen Dichtungen und den kurbelkammerseitigen Dichtun- gen durch den Unterdruck im Ansaugkanal bzw. An saugsystem kontinuierlich mit frischer Luft durch strömt und die schädlichen Abgasreste mit grösster Sicherheit von den Laufflächen der Wälzlager 4, dem Innenring 3 bzw. Aussenring 5 ferngehalten.
Statt der geschlitzten Ringe 14, 15 und der Ring träger 12, 13 können auch Membranscheiben zur kurbelkammerseitigen Abdichtung verwendet werden, wenn z. B. für die Anordnung von Spreizringen 14, 15 der Raum nicht ausreicht. Die Membranscheiben können in an sich bekannter Weise durch beigelegte Ringe zwischen dem Innenring 3 und den Hub scheiben 22 bzw. 23 mit der Kurbelwelle umlaufend befestigt sein und entweder an Verbreiterungen des Aussenringes 5 oder an dazwischen angeordneten Ringen abdichten.
Crankshaft bearings in a two-stroke internal combustion engine with fuel oil mixture lubrication It is known to seal the rolling bearings of a crankshaft for a multi-cylinder two-stroke internal combustion engine with a crankcase pump on both sides by sealing elements. The harmful exhaust gas components reached in the crank chamber cannot attack the bearings in this way. Oil, on the other hand, can remain in the bearing surfaces in sufficient quantities or, as a result of the surface tension, creep past the sealing rings into the bearing surfaces.
With this design there is the possibility that harmful exhaust gas components in the oil can get into the running surfaces of the bearings and contribute to their premature aging. The object of the invention is a complete separation of the bearing lubrication from the engine lubrication.
The invention is based on a crankshaft roller bearing, sealed on both sides by seals, for two-stroke internal combustion engines with fuel-oil mixture lubrication. The novelty is that the bearing filled with lubricant has seals to hold back the lubricant, while it is sealed against the crankcase chambers by additional seals.
The figure shows an example from implementation of the subject invention.
The crankshaft 1 is mounted with its central journal 2 via inner rings 3, rolling elements 4 and outer ring 5 in the housing 6 and 7, respectively. The rolling elements 4 who are sealed by seals 8 and 9 so that the lubricant once filled into the bearing cannot be lost. At the same time protect you lines 8 and 9 in a known manner the rolling elements or the raceways on the inner ring 3 and on the outer ring 5 from the ingress of foreign bodies. With such bearings, a very long service life can be achieved without maintenance and repairs.
The crank chambers 10 and 11, which contain a mixture of fuel, air and oil mixed with exhaust gas residues, are each sealed by a piston ring seal 12 and 13 with piston rings 14, 15. In this way, no exhaust gas components come into contact with the seals 8 and 9 and consequently also do not come into contact with the running surfaces of the roller bearing bodies 4 in the inner ring 3 or in the outer ring 5.
Gaps 16, 17 between the seals on the crank chamber side (slotted rings 14, 15) and the seals 8 and 9 on the bearing side. These form a kind of buffer for absorbing and reducing the pressure differences in the crank chambers 10 and 11.
The gaps 16, 17 can also be enlarged by means of cutouts 18, 19. Likewise, the buffer effect of the column 16, 17 or recesses 18, 19 is increased, d'ass in the housing parts 6 and 7 recesses 20, 21 are arranged.
If the recesses 20, 21 are in connec tion with the outside air through holes in the housing 6 or 7, a further improvement of the buffer effect is given between the seals on the crank chamber side and the seals on the bearing side. It can be increased by the fact that the recesses 20 and 21 are also routed with lines to the intake port of the carburetor or into the cylinder in the vicinity of the intake window.
In this way, fresh air flows through the space between the seals on the bearing side and the seals on the crankcase side due to the negative pressure in the intake duct or intake system, and the harmful exhaust gas residues are most reliably removed from the running surfaces of the roller bearings 4, the inner ring 3 Outer ring 5 kept away.
Instead of the slotted rings 14, 15 and the ring carrier 12, 13, membrane disks can also be used for sealing the crankcase, if z. B. for the arrangement of expansion rings 14, 15, the space is not sufficient. The membrane disks can be circumferentially attached to the crankshaft in a manner known per se by enclosed rings between the inner ring 3 and the hub 3 and the hub and seal either to widenings of the outer ring 5 or to rings arranged in between.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEA27935A DE1046945B (en) | 1957-09-19 | 1957-09-19 | Crankshaft bearings for two-stroke internal combustion engines with fuel oil mixture lubrication |
Publications (1)
Publication Number | Publication Date |
---|---|
CH365250A true CH365250A (en) | 1962-10-31 |
Family
ID=6926515
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH6386958A CH365250A (en) | 1957-09-19 | 1958-09-12 | Crankshaft bearings in a two-stroke internal combustion engine with mixed fuel oil lubrication |
Country Status (6)
Country | Link |
---|---|
BE (1) | BE571338A (en) |
CH (1) | CH365250A (en) |
DE (1) | DE1046945B (en) |
FR (1) | FR1202643A (en) |
GB (1) | GB882299A (en) |
NL (2) | NL231390A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1997045649A1 (en) * | 1996-05-31 | 1997-12-04 | Aktiebolaget Electrolux | Crankshaft bearing system |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2523722Y2 (en) * | 1988-04-28 | 1997-01-29 | 光洋精工株式会社 | Sealed bearing |
DE4311257B4 (en) * | 1993-04-06 | 2005-01-27 | Solo Kleinmotoren Gmbh | internal combustion engine |
JP2003525396A (en) * | 1997-08-27 | 2003-08-26 | アルマーブ エルエルシー | Vibration damping member for internal combustion engine |
US6745740B1 (en) | 2003-02-13 | 2004-06-08 | Decuir Engine Technologies, Llc | Vibration dampening arrangement for internal combustion engines |
US6792909B1 (en) | 2003-03-10 | 2004-09-21 | Decuir Engine Technologies, Llc. | Crankshaft with vibration dampeners for internal combustion engines |
-
0
- NL NL105374D patent/NL105374C/xx active
- BE BE571338D patent/BE571338A/xx unknown
- NL NL231390D patent/NL231390A/xx unknown
-
1957
- 1957-09-19 DE DEA27935A patent/DE1046945B/en active Pending
-
1958
- 1958-09-12 CH CH6386958A patent/CH365250A/en unknown
- 1958-09-19 FR FR1202643D patent/FR1202643A/en not_active Expired
- 1958-09-19 GB GB30109/58A patent/GB882299A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1997045649A1 (en) * | 1996-05-31 | 1997-12-04 | Aktiebolaget Electrolux | Crankshaft bearing system |
US6086260A (en) * | 1996-05-31 | 2000-07-11 | Aktiebolaget Electrolux | Crankshaft bearing system |
Also Published As
Publication number | Publication date |
---|---|
FR1202643A (en) | 1960-01-12 |
BE571338A (en) | 1900-01-01 |
DE1046945B (en) | 1958-12-18 |
GB882299A (en) | 1961-11-15 |
NL231390A (en) | 1900-01-01 |
NL105374C (en) | 1900-01-01 |
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