CN1185425C - Crank bearing of high-power engine - Google Patents
Crank bearing of high-power engine Download PDFInfo
- Publication number
- CN1185425C CN1185425C CNB991047931A CN99104793A CN1185425C CN 1185425 C CN1185425 C CN 1185425C CN B991047931 A CNB991047931 A CN B991047931A CN 99104793 A CN99104793 A CN 99104793A CN 1185425 C CN1185425 C CN 1185425C
- Authority
- CN
- China
- Prior art keywords
- bearing
- protective layer
- motor
- bearing surface
- described crankshaft
- 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 - Lifetime
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
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/20—Sliding surface consisting mainly of plastics
- F16C33/201—Composition of the plastic
-
- 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
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- 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
- F02F7/0002—Cylinder arrangements
- F02F7/0007—Crankcases of engines with cylinders in line
-
- 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
- F02F7/0034—Built from sheet material and welded casings
-
- 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
- F16C5/00—Crossheads; Constructions of connecting-rod heads or piston-rod connections rigid with crossheads
-
- 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
- F02F2007/0097—Casings, e.g. crankcases or frames for large diesel engines
Abstract
The invention relates to a high-power engine, especially crank of two-stroke diesel engine bearing of high-power. This crankshaft bearing has the lower part 2, the removable upper part 3 and a thin sliding bearing shell on which at least a part divided into two half shells 5a, b is made of hard bearing metal, desirably, an AlSn alloy, and a lubricant is supplied to the bearing surface in ordinary operation. In this case, the bearing surface of at least the lower half shell 5a has a protective layer 11 excellent in an unlubricated operation characteristic and formed as an abrasion layer abraded in a short time, and the thickness is set in an allowable range of a diametral error.
Description
Technical field
The present invention relates to the especially crankshaft bearing of two-stroke high-power diesel engine of a kind of high power engine, it has a bottom and a removable top and has one to be divided into the thin plain bearing bush that two halfliners are made with the best AlSn alloy of hard bearing metal to small part, can add oiling agent at its bearing surface of normal work period.
Background technique
For example by known this class formation of DK170811B1 of the applicant.In this known structure, use thin bearing shell, they have the bearing of steel, and bearing inside is coated with the coating that contains bearing surface that the best AlSn alloy of useful bearing metal constitutes.The AlSn alloy, especially as AlSn40, cause a bearing surface that can bear high load, so compare with the design that has the bearing surface that constitutes with Babbitt in the past, the width of bearing can reduce, and this point is very important for obtaining the compact structure mode.On the other hand, the ability of the anti-running dry of AlSn alloy is lower than Babbitt.This situation is not brought any problem certainly under normal operating conditions, because have lubricated fully herein.
Yet, in DK170811B1, in the high power engine of mentioned type, for example can see the high-power two stroke diesel engine that is used for the ships driving, bent axle just must rotation when motor assembles.In real work, adopt the auxiliary engine that can engage with flywheel for this reason.But the situation that may occur when motor assembles that bearing lubrication system is not worked as yet or can't reliably working.Therefore, in this known design, exist such danger, promptly, there the bearing surface that constitutes with the AlSn alloy in the motor assembly process because running dry and impaired or destroy, this is for causing adverse influence original accessible working life, and may cause the great number maintenance expenses.Although attempted by adopting molybdenum or analog to relax this shortcoming.Yet this type of material has very low surface tension.Therefore existing this material has the danger that causes bearing shell or its halfliner to divide and disintegrate, thereby makes their possibility slippages.
Summary of the invention
Therefore, as starting point, the objective of the invention is, avoiding described these shortcomings and keeping under the situation of principal advantages, take simple in structure and economic measure, improve the design of the described type of preface, make bearing impaired thereby effectively prevent in initial running dry process.
According to the present invention; a kind of crankshaft bearing of high power engine is proposed; it has a bottom and a detachable top and has one to separate; plain bearing bush with the manufacturing of hard bearing metal; can add oiling agent at its bearing surface of normal work period; it is characterized by: only the bearing surface of low brass is provided with a protective layer that has good running dry characteristic and be designed to wearing layer in new state; this protective layer only is used for the assembling of motor and should disappears after the motor assembling; this protective layer does not contain molybdenum; its thickness is in the diameter tolerance scope that allows, and the thickness of described protective layer is 10-30 μ m.
By the present invention is to reach the measure that this purpose takes to be, the bearing surface of low brass is provided with one in new state and has good running dry characteristic and be designed to the protective layer of the wearing layer of wearing and tearing fast at least, and its thickness is in the diameter tolerance scope that allows.
Take these measures to overcome the shortcoming of Known designs fully, effectively prevented, so can reach long working life and thereby long maintenance interval be arranged because initial running dry causes bearing impaired.Because protective layer only needs to be used for initial running dry at assembling stage, so protective layer can be so thin, so that its thickness changes in the diameter tolerance scope that allows.After the protective layer wearing and tearing, just be in normal state.Therefore need not to change the size of boring etc.The abrasive particle that produces in the wear-resistant layer process is so thin, so that can it be taken away by means of lubricant oil when bearing lubrication system puts into operation.Needn't worry that these tiny abrasive particles can cause fault in lubrication system inside.Because can be very thin, do like this and can also save materials consumption by protective layer of the present invention.In addition, protective layer can apply simply.Therefore, generally speaking, the expense relevant with taking measure of the present invention is lower.However, still can reliably prevent the destruction that initial running dry is possible, and it is unnecessary that materials such as adopting molybdenum is become by protective layer of the present invention.Therefore take measure of the present invention to guarantee to have outstanding Economy.
Illustrated that in the dependent claims favourable design and above-mentioned measure conform with the improvement of purpose.For example, protective layer can advantageously be used teflon (Teflon) manufacturing.This material has good self-lubricating property, and thereby is suitable for material as running dry especially.The protective layer that uniformity is arranged on whole relevant surface in addition.Need not to worry the local distribution inequality.
The thickness of protective layer is preferably 5 μ-50 μ, especially 10 μ-30 μ.This thickness is enough to make wearing-in period longer period than running dry on the one hand, and guarantees on the other hand can not produce unallowed bearing play after protective layer weares and teares fully.
Protective layer is preferably designed as sprayfused coating.This just can obtain desired little bed thickness with simple method.What conform with purpose is to be sprayed in the low temperature range that is up to 150 ℃ and to carry out, so exhausted nothing makes the bearing surface of wanting coating produce the danger of distortion.
When motor assembles, the load that bent axle is in fact only conducted oneself with dignity and caused.In any case therefore enough if the bearing structure of split has only it to descend half to be provided with by protective layer of the present invention, the advantage about aspects such as diameter Relationship, amount of abrasive, materials consumption and cost of production so listed above is further strengthened.
Other favourable designs of above-mentioned measure and the improvement that conforms with purpose illustrate in remaining dependent claims, and can further be found out by means of in the illustrating of accompanying drawing by following.
Description of drawings
Represent in the accompanying drawing that will illustrate below:
Fig. 1 high power engine crankshaft main bearing view; And
Fig. 2 is by the section of crankshaft main bearing shown in Figure 1.
Embodiment
Basic structure and working method that high power engine for example can be used as the two-stroke high-power diesel engine of ships motor all are that known therefore this paper need not to describe in detail.
Crankshaft main bearing shown in Figure 1 is formed by being combined in bottom 2 in the frame 1 and the top 3 that can be contained in above the bottom.Detachable top 3 usefulness pull bars 4 are fixing.Bottom 2 is shaped on complementation with top 3 and becomes the recessed poor of a hole, inserts halfliner 5a, the b of split removable metal in recessed being pickled with grains or in wine respectively, and at the removable metal internal support does not have the relevant axle journal of the bent axle of expression in detail here.3 are equipped with the oiling agent input pipeline 7 that is used to import lubricant oil on top.What here bearing shell was related is so-called thin bearing shell.
For requiring top 3 to be pressed on this thin bearing shell on the bottom 2, bearing means assembling back processing is attached troops to a unit in the hole of bearing shell and final processing bearing shell.For built-up crankshaft, remove top 3, each axle journal 6 of bent axle just can be inserted in each relevant low brass 5a of main bearing.Then, main bearing is assembled complete by installing top 3.When adopting thick bearing shell, it allows between bottom 2 and top 3 certain clearance is arranged, and relevant in this case hole can process under the state that decomposes.
In illustrated embodiment, two halves bearing shell 5a, the b of thin bearing shell respectively comprise a steel bearing 8 that can be clear that by Fig. 2, its the inside is bearing surface one side just, being provided with one and containing a kind of appropriate bearing metal of bearing surface 9 usefulness, here is to use the preferably coating 10 of AlSn40 system of AlSn alloy.Coating can roller coat.AlSn alloy such as AlSn40 are a kind of hard bearing metal that bears high load, and it allows the width of bearing smaller.On the other hand, confirmed already that this material was very sensitive for running dry.
In this example, when assembling, motor, can cause running dry if installed bent axle must can carry out rotating before the effectively lubricating at bearing surface.Bent axle is not as yet because firing pressure and only because its deadweight and stand under load in this case.This moment, bent axle was by means of an auxiliary engine rotation that can engage.To compare with normal operation be lower to the revolution of per minute in this case.
For preventing owing to this type of initial running dry is impaired; new state at bearing shell; bearing surface 9 is provided with the protective layer 11 that can compare rapid wearing that schematically illustrates with point among Fig. 2; it is well behaved that is be made up of the material of good self-lubricating function by a kind of running dry; and it has constituted a wearing layer, the wear life just automatically disappearance of this wearing layer through relatively lacking.The wear life of protective layer 11 needs only just much of that corresponding to be assembled to the running time of being gone through when lubrication system has ability to work from motor, running time that this is just relatively shorter or fewer rotation number.Layer 11 no longer need protection after this also owing to fair wear and tear disappears.
Protective layer 11 guarantees; lubrication system do not start working as yet or do not play one's part to the full as yet and bent axle must rotate during (when motor assembles, just this situation can occur), here with the AlSn alloy constitute can be not impaired to very responsive coating 10 surfaces of running dry.
When motor assembles, as top mentioned, the load that bent axle is caused by its deadweight only.Therefore, only establishing protective layer 11 as Fig. 2 schematically illustrates on low brass 5a can meet the demands fully.But, in order to improve reliability and to simplify and produce or storehouse management, suitable is that two halfliner 5a, b all can be provided with protective layer 11, so form one along the continuous protective layer of whole bearing surface.Can certainly imagine additionally on axle journal 6 with zone that bearing shell contacts in also be provided with the protective layer of the above-mentioned type.At some in particular cases, only there is this design just can obtain desired effect.
Protective layer 11 can be made up of teflon (Teflon) or the plastics that similarly have a good running dry characteristic.But also can imagine the cladding material that substitutes this uniformity, and adopt a kind of dry lubrication material that is embedded in the adhesive, be a kind of suitable polymer powder and/or metallic dust for example in form.The bed thickness of protective layer 11 can be for example in the scope of 5-50 μ.Related here is such order of magnitude, and promptly it is in the interior surface roughness that also meanwhile can compensate bearing shell bearing surface 9 well of diameter tolerance scope of permission.Is appropriate by testing special proof bed thickness in the scope of 10-30 μ.
Protective layer 11 can be brushed on relevant surface, or also can roller coat.What especially preferentially adopt is by applying protective layer 11 by means of the equipment that nozzle is arranged.This kind equipment can have makes protective layer 11 accurately economically.Application temperature depends on the material of employed running dry.Application temperature should not surpass 150 ℃ scope, to avoid distortion.Under this temperature, the plastics of having mentioned above can well apply.Often adopt cold being coated with, that is coating at ambient temperature.This is particularly useful for inlaying the dusty material in adhesive.
Finish and after lubrication system puts into operation in motor assembling, that is after inflow pipeline 7 adds lubricant oil, just no longer need protection layers 11.Therefore protective layer is no longer upgrading after the wearing and tearing fully.
When only in engine overhaul the old bearing shell that remains being used as the new bearing shell of standard again is exception.
Claims (7)
1. the crankshaft bearing of high power engine; it has a bottom (2) and a detachable top (3) and has one to separate; plain bearing bush with the manufacturing of hard bearing metal; can add oiling agent at its bearing surface of normal work period (9); it is characterized by: only the bearing surface (9) of the inside of low brass (5a) is provided with a protective layer (11) that has good running dry characteristic and be designed to wearing layer in new state; this protective layer only is used for the assembling of motor and should disappears after the motor assembling; this protective layer does not contain molybdenum; its thickness is in the diameter tolerance scope that allows, and the thickness of described protective layer is 10-30 μ.
2. according to the described crankshaft bearing of claim 1, it is characterized by: protective layer (11) to small part is made up of plastics.
3. according to the described crankshaft bearing of one of all claims in prostatitis, it is characterized by: protective layer (11) to small part is made up of teflon.
4. according to claim 1 or 2 described crankshaft bearings, it is characterized by: protective layer (11) is designed to sprayfused coating.
5. according to claim 1 or 2 described crankshaft bearings, it is characterized by: the application temperature of protective layer (11) is up to 150 ℃.
6. according to claim 1 or 2 described crankshaft bearings, it is characterized by: described motor is the two-stroke high-power diesel engine.
7. according to claim 1 or 2 described crankshaft bearings, it is characterized by: described hard bearing metal is the AlSn alloy.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19814756.2 | 1998-04-02 | ||
| DE19814756A DE19814756A1 (en) | 1998-04-02 | 1998-04-02 | Bearing for large engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1230639A CN1230639A (en) | 1999-10-06 |
| CN1185425C true CN1185425C (en) | 2005-01-19 |
Family
ID=7863336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB991047931A Expired - Lifetime CN1185425C (en) | 1998-04-02 | 1999-04-02 | Crank bearing of high-power engine |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP3693519B2 (en) |
| KR (1) | KR100519708B1 (en) |
| CN (1) | CN1185425C (en) |
| DE (1) | DE19814756A1 (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6868810B2 (en) * | 2002-02-06 | 2005-03-22 | Honda Giken Kogyo Kabushiki Kaisha | Bearing device |
| CN100390428C (en) * | 2003-04-10 | 2008-05-28 | 马来西亚国家石油公司 | Engine accessory drive system |
| EP1522750B2 (en) | 2003-10-06 | 2018-02-14 | Taiho Kogyo Co., Ltd | Multi-layer sliding bearing |
| AT500826B8 (en) * | 2003-12-17 | 2007-02-15 | Miba Gleitlager Gmbh | BEARINGS |
| AT501878B1 (en) | 2005-04-29 | 2008-05-15 | Miba Gleitlager Gmbh | BEARING ELEMENT |
| AT503986B1 (en) | 2006-08-02 | 2008-05-15 | Miba Gleitlager Gmbh | LAYER LAYER FOR A BEARING ELEMENT |
| KR20100127694A (en) * | 2009-05-26 | 2010-12-06 | 베르트질레 슈바이츠 악티엔게젤샤프트 | Large crosshead diesel engine |
| CN105257801A (en) * | 2015-11-04 | 2016-01-20 | 四川大学 | Pure rolling type automobile differential mechanism |
| CN105443716B (en) * | 2015-12-22 | 2018-01-30 | 四川大学 | The rolling of two-phase external cam shock wave moves block formula automobile differential |
| US10495141B2 (en) * | 2017-07-20 | 2019-12-03 | GM Global Technology Operations LLC | Bearing with lightweight backing substrate |
| EP3623651A1 (en) * | 2018-09-12 | 2020-03-18 | Winterthur Gas & Diesel AG | Bearing with bearing pins for use in engines and other devices |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2926080A1 (en) * | 1979-06-28 | 1981-01-08 | Philips Patentverwaltung | DRY LUBRICANTS |
| JP2778646B2 (en) * | 1988-09-27 | 1998-07-23 | 高木特殊工業株式会社 | Plain bearing |
| JPH02102912A (en) * | 1988-10-07 | 1990-04-16 | Ndc Co Ltd | Sliding bearing used for crankshaft-connecting rod assembly and crankshaft for the same assembly |
| DK170811B1 (en) * | 1993-05-05 | 1996-01-22 | Man B & W Diesel Gmbh | Reciprocating engine with a crankshaft, seated on main bearings |
| JP3094741B2 (en) * | 1993-08-19 | 2000-10-03 | 日産自動車株式会社 | Bearing metal for internal combustion engines |
| JP3681022B2 (en) * | 1995-12-21 | 2005-08-10 | 光洋精工株式会社 | Rolling bearing |
| JPH09303372A (en) * | 1996-05-13 | 1997-11-25 | Toyota Motor Corp | Bearing structure of crankshaft |
-
1998
- 1998-04-02 DE DE19814756A patent/DE19814756A1/en not_active Ceased
-
1999
- 1999-04-01 KR KR10-1999-0011457A patent/KR100519708B1/en not_active IP Right Cessation
- 1999-04-01 JP JP09535299A patent/JP3693519B2/en not_active Expired - Lifetime
- 1999-04-02 CN CNB991047931A patent/CN1185425C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CN1230639A (en) | 1999-10-06 |
| DE19814756A1 (en) | 1999-03-11 |
| JP2000027868A (en) | 2000-01-25 |
| KR19990082841A (en) | 1999-11-25 |
| KR100519708B1 (en) | 2005-10-07 |
| JP3693519B2 (en) | 2005-09-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: MAN DIESEL AS Free format text: FORMER NAME: MAN DIESEL AS Owner name: MAN DIESEL AS Free format text: FORMER NAME: MAN B + W DIESEL AS. Owner name: MAN DIESEL ENGINES AND TURBINE GERMAN SUBSIDIARY, Free format text: FORMER NAME: MAN DIESEL AS |
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| CP01 | Change in the name or title of a patent holder |
Address after: Copenhagen Patentee after: MAN DIESEL & TURBO FILIAL AF MAN DIESEL & TURBO SE TYSKLAND Address before: Copenhagen Patentee before: MAN DIESEL & TURBO FILIAL AF MAN DIESEL & TURBO SE TYSKLAND Address after: Copenhagen Patentee after: MAN DIESEL & TURBO FILIAL AF MAN DIESEL & TURBO SE TYSKLAND Address before: Copenhagen Patentee before: MAN DIESEL filial af MAN Diesel SE Tyskland Address after: Copenhagen Patentee after: MAN DIESEL filial af MAN Diesel SE Tyskland Address before: Copenhagen Patentee before: MAN B & W DIESEL A/S |
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| CX01 | Expiry of patent term |
Granted publication date: 20050119 |
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| CX01 | Expiry of patent term |