CN106870198A - A kind of crankshaft main bearing lid and aviation piston engine - Google Patents
A kind of crankshaft main bearing lid and aviation piston engine Download PDFInfo
- Publication number
- CN106870198A CN106870198A CN201710254613.1A CN201710254613A CN106870198A CN 106870198 A CN106870198 A CN 106870198A CN 201710254613 A CN201710254613 A CN 201710254613A CN 106870198 A CN106870198 A CN 106870198A
- Authority
- CN
- China
- Prior art keywords
- beating cap
- bearing lid
- crankshaft
- cap body
- main bearing
- 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
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Classifications
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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
- F02F7/0021—Construction
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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
- F02F7/0012—Crankcases of V-engines
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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
- F02F7/0065—Shape of casings for other machine parts and purposes, e.g. utilisation purposes, safety
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- 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
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
A kind of crankshaft main bearing lid and aviation piston engine; the crankshaft main bearing lid is step type; separate installment is used between engine lower body; crankshaft main bearing lid is connected by bolt with upper machine body; impact during reciprocating motion of the pistons to bent axle is delivered in main beating cap, and upper machine body is delivered to by bolt, is undertaken by upper machine body; reduce the impact of alternate stress suffered by lower body, effectively protect lower body not ruptured because of high cycle fatigue.
Description
Technical field
The present invention relates to a kind of crankshaft main bearing lid and aviation piston engine.
Background technology
Aviation piston engine uses heavy oil as fuel, and with good economy, fuel transport safety is obtained and held
Easily, the plan of science and technology that pressure Heavy End Aviation Fuel piston engine has been classified as the period of country 13 is developed, will on military and civilian
There is very big purposes.China at present just starting starting research and develop such engine, but at present this respect data disclose it is less.
To obtain power to weight ratio high, aviation piston engine needs to mitigate body weight as far as possible, and aviation piston heavy oil starts
Machine is currently mainly used opposed cylinder, and the main beating cap insertion of opposed cylinder is fixed in lower body, and such piston is back and forth being transported
Impact when dynamic will be directly delivered in main beating cap, be then applied to bolted opposed casing by main beating cap
On, then impact when engine works is born by casing and bolt, because opposed cylinder uses opposed cylinder layout type, because
The impact produced during this work can cancel out each other a part, so as to mitigate the fatigue of casing, improve its reliability, but aviation
Piston-engined range of application determines that it needs the diversity of distribution engine, such as layout in upright arrangement, V-type layout etc., but
Such piston can not cancel out each other in the impact for moving back and forth generation, and impact is applied directly on casing and producing fatigue to it,
Lower body will be caused to be ruptured because of high cycle fatigue if serious, very big potential safety hazard, present this area skill are brought to aircraft industry
Art personnel are by strengthening lower body thickness or intensity being ensured using new material technology, but this is to lose the Gao Gong of engine
The mode of anharmonic ratio improves the mode of product cost come what is realized, and such solution causes product cost not high.
The content of the invention
Technical purpose of the invention is to provide one kind can effectively prevent lower body fatigue, it is possible to increase engine is without reason
The crankshaft main bearing lid and aviation piston engine of barrier run time and reliability.
The present invention adopts the following technical scheme that the technical purpose for realizing the above：A kind of crankshaft main bearing lid, including main shaft
Hold lid body, the both sides and bottom side of the main beating cap body be provided with it is being contacted with lower body, main beating cap body is radially limited
The supporting part of position, the upper middle side part of the main beating cap body is provided with bearing mounting hole, and the main beating cap body is pacified in bearing
Fill the bolt hole being symmetrically arranged on two with for being fixed on upper machine body in hole.Main beating cap body is with lower body for separate type is pacified
Dress, main beating cap body is contacted come spacing by supporting part with lower body, and main beating cap body is fixed with upper machine body, by this
Structure so that when the engine operates, vibration and impact pass to bent axle, and then are delivered on main beating cap body, base bearing
The impact that lid body bears passes to upper machine body with vibration through bolt, is born so as to impact is transferred into upper machine body so that lower machine
Body is only subjected only to the slight vibration of engine operation, reaches the purpose for preventing lower body fatigue, because upper machine body intensity is high, knot
Structure size is big, and design strength is much larger than lower body, with enough strength assurance coefficients, therefore can resist by impacting completely
The high cycle fatigue for causing, the impact of this degree will not be impacted to upper machine body, so as to effectively protect lower body, prevent lower machine
Body ruptures because of high cycle fatigue.
Further, the main beating cap body be symmetrically arranged on two with it is being connected with bolt hole, facilitate bolt install open
Mouthful.
Further, the bolt hole is embedded with bushing, and the bush inside sets screw thread.Bushing causes that bolt had been screwed into
Be not in gap in journey, prevent in high-frequency impact shock, to the impulsive force of bolt, bushing can also bear one in addition
Fixed shear stress.
Further, the bearing mounting hole upper surface of the main beating cap body is provided with the groove for being easily installed bearing shell.
Further, the main beating cap body is T-shaped.This structure can be while proof strength, it is ensured that bolt is pacified
The convenience of dress.
A kind of aviation piston engine, including above-mentioned crankshaft main bearing lid, upper machine body and lower body, set on the lower body
There is the opening matched with crankshaft main bearing lid size, the crankshaft main bearing lid is arranged in the opening by supporting part, institute
State upper machine body and be provided with bolt fixing hole corresponding with crankshaft-bearing cover hole site, the crankshaft main bearing lid is by setting
Being bolted on upper machine body in bolt hole.
Above-mentioned aviation piston engine is the aviation piston engine of V-type layout.
In sum, the present invention can effectively prevent lower body fatigue, it is possible to increase engine non-failure operation time and
Reliability.
Brief description of the drawings
Fig. 1 is the aviation piston engine schematic internal view of V-structure layout of the present invention.
Fig. 2 is the scheme of installation of crankshaft main bearing lid of the present invention.
Fig. 3 is aviation piston engine appearance schematic diagram of the present invention.
Fig. 4 is the structural representation of crankshaft main bearing lid of the present invention.
Specific implementation measure
With reference to accompanying drawing, the present invention is made a more detailed description.
As shown in Figures 1 to 4, a kind of aviation piston engine, is arranged on down using separate type step type main beating cap body 8
On body 1, main beating cap body 8 is fixed on upper machine body 10 by the first bolt 7 and bushing 6, upper machine body 10 and lower machine
The purpose being fixed together is reached using the second bolt 9 between body 1.Engine uses V-type layout, to reduce installation chi
Very little, piston 4 is connected with connecting rod 3, and drivening rod 3 is down moved, and connecting rod 3 is connected together with bent axle 2.Bent axle 2 is seated in bearing 5
On, bearing 5 is fixed together with main beating cap body 8, prevents engine bearing 5 and main beating cap body 8 in the course of the work
Between have relative motion.There is no any annexation between main beating cap body 8 and lower body 1, be only seated on lower body 1.
First bolt 7 plays the Main Function of connection main beating cap body 8 and upper machine body 10, and bushing is embedded with bolt hole, fills spiral shell
Gap between bolt and screw, to prevent from having any relative motion between main beating cap body 8 and upper machine body 10.
When gaseous-pressure is by after transmission, impacting on main beating cap body 8, is delivered to via main beating cap body 8
On one bolt 7, and then upper machine body 10 is passed to, because the design strength and physical dimension of upper machine body 10 are much larger than lower body 1, tool
There are enough strength assurance coefficients, therefore the high cycle fatigue caused by impact can be resisted completely.
The main beating cap body 8 effectively can be passed the impulsive force during crank rotation by the first bolt 7 and bushing 6
It is delivered on upper machine body 10, reduces the impact being subject in the course of the work of lower body 1 and the high cycle fatigue for thus causing
See Fig. 1, when the engine operates, the explosive force that the combustion gas for deflagrating is produced is applied directly to the top surface of piston 4
On, it is attached by piston pin between piston 4 and connecting rod 3, piston 4 is descending in cylinder, promotes bent axle 2 to revolve by connecting rod 3
Turn, and then engine output and moment of torsion.There is no any constraint between lid body 8 and lower body 1 because separating main shaft holds,
Belong to two completely self-contained parts, vibration and impact pass to bent axle, and then are delivered on main beating cap body, now due to
The effect of the first bolt 7 and bushing 6, the linking together tightly with upper machine body 10 of main beating cap body 8, and with lower body 1 it
Between only contact.The impact that main beating cap body 8 bears mainly passes to upper machine body with vibration through the first bolt 7 and bushing 6, by
The upper machine body 10 that intensity is high, physical dimension is big bears, and lower body 1 is through bearing the slight vibration of engine operation, main beating cap
The diameter of bolt hole of both sides is more than bolt on body 8, and upper surface has groove to be easy to the installation of bearing shell, and the first bolt 7 is inserted through the hole
There is gap and main beating cap body between after entering, under long-term vibration and impact, main beating cap body 8 and upper machine body 10 it
Between it is possible that gap, therefore the bushing 6 being made of high-strength material is arranged in bolt hole, has screw thread inside bushing 6,
Any gap would not occur during being screwed into first bolt 7, and in high-frequency impact shock, bushing 6 can also hold
By certain shear stress.
Claims (7)
1. a kind of crankshaft main bearing lid, including main beating cap body, it is characterised in that：The both sides and bottom of the main beating cap body
Side is provided with supporting part contacted with lower body, radially spacing to main beating cap body, in the upside of the main beating cap body
Portion is provided with bearing mounting hole, main beating cap body being symmetrically arranged on two with for being fixed on upper machine body in bearing mounting hole
Bolt hole.
2. crankshaft main bearing lid according to claim 1, it is characterised in that：The both sides of the main beating cap body symmetrically set
There is opening being connected with bolt hole, facilitating bolt to install.
3. crankshaft main bearing lid according to claim 1 and 2, it is characterised in that：The bolt hole is embedded with bushing, described
Bush inside sets screw thread.
4. crankshaft main bearing lid according to claim 3, it is characterised in that：The bearing mounting hole of the main beating cap body
Upper surface is provided with the groove for being easily installed bearing shell.
5. crankshaft main bearing lid according to claim 4, it is characterised in that：The main beating cap body is T-shaped.
6. a kind of described crankshaft main bearing lid of one of aviation piston engine, including claim 1 to 5, it is characterised in that：Bag
Upper machine body and lower body are included, the lower body is provided with the opening matched with crankshaft main bearing lid size, the crankshaft main bearing
Lid is arranged in the opening by supporting part, and the upper machine body is provided with spiral shell corresponding with crankshaft-bearing cover hole site
Bolt fixing hole, the crankshaft main bearing lid is by being located at being bolted on upper machine body in bolt hole.
7. aviation piston engine according to claim 6, it is characterised in that：The aviation piston engine is V-type cloth
The aviation piston engine of office.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710254613.1A CN106870198B (en) | 2017-04-18 | 2017-04-18 | Crankshaft main bearing cap and aviation piston engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710254613.1A CN106870198B (en) | 2017-04-18 | 2017-04-18 | Crankshaft main bearing cap and aviation piston engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106870198A true CN106870198A (en) | 2017-06-20 |
| CN106870198B CN106870198B (en) | 2022-10-21 |
Family
ID=59162896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710254613.1A Active CN106870198B (en) | 2017-04-18 | 2017-04-18 | Crankshaft main bearing cap and aviation piston engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106870198B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB712307A (en) * | 1951-07-16 | 1954-07-21 | Bayerische Motoren Werke Ag | Crank shaft bearing, especially for combustion engines with cylinders arranged in-line |
| CN1386963A (en) * | 2001-05-17 | 2002-12-25 | 本田技研工业株式会社 | Oil pump mounting structure |
| US20030118260A1 (en) * | 2001-12-21 | 2003-06-26 | Suzuki Motor Corporation | Bearing cap structure for engine |
| CN201401233Y (en) * | 2009-04-27 | 2010-02-10 | 常柴股份有限公司 | V-type water-cooled diesel engine |
| CN103206252A (en) * | 2012-09-06 | 2013-07-17 | 祥天控股（集团）有限公司 | Control mechanism of variable multi-cylinder aerodynamic engine |
| CN104047758A (en) * | 2014-07-07 | 2014-09-17 | 广西玉柴机器股份有限公司 | Main bearing cover of engine |
| CN205064097U (en) * | 2015-08-05 | 2016-03-02 | 宁波市鄞州德来特技术有限公司 | Integrated morphology and internal -combustion engine of lower organism |
| CN205078357U (en) * | 2015-09-06 | 2016-03-09 | 常州市宝迅机械有限公司 | Diesel engine of diesel engine organism and applied this organism |
| US20160237946A1 (en) * | 2015-02-12 | 2016-08-18 | Ford Global Technologies, Llc | Bulkhead insert for an internal combustion engine |
-
2017
- 2017-04-18 CN CN201710254613.1A patent/CN106870198B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB712307A (en) * | 1951-07-16 | 1954-07-21 | Bayerische Motoren Werke Ag | Crank shaft bearing, especially for combustion engines with cylinders arranged in-line |
| CN1386963A (en) * | 2001-05-17 | 2002-12-25 | 本田技研工业株式会社 | Oil pump mounting structure |
| US20030118260A1 (en) * | 2001-12-21 | 2003-06-26 | Suzuki Motor Corporation | Bearing cap structure for engine |
| CN201401233Y (en) * | 2009-04-27 | 2010-02-10 | 常柴股份有限公司 | V-type water-cooled diesel engine |
| CN103206252A (en) * | 2012-09-06 | 2013-07-17 | 祥天控股（集团）有限公司 | Control mechanism of variable multi-cylinder aerodynamic engine |
| CN104047758A (en) * | 2014-07-07 | 2014-09-17 | 广西玉柴机器股份有限公司 | Main bearing cover of engine |
| US20160237946A1 (en) * | 2015-02-12 | 2016-08-18 | Ford Global Technologies, Llc | Bulkhead insert for an internal combustion engine |
| DE102016102391A1 (en) * | 2015-02-12 | 2016-08-18 | Ford Global Technologies, Llc | SEPARATOR PANEL FOR A COMBUSTION ENGINE |
| CN205064097U (en) * | 2015-08-05 | 2016-03-02 | 宁波市鄞州德来特技术有限公司 | Integrated morphology and internal -combustion engine of lower organism |
| CN205078357U (en) * | 2015-09-06 | 2016-03-09 | 常州市宝迅机械有限公司 | Diesel engine of diesel engine organism and applied this organism |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106870198B (en) | 2022-10-21 |
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