CN112780469A - Diesel engine fuel injection pump driving device - Google Patents
Diesel engine fuel injection pump driving device Download PDFInfo
- Publication number
- CN112780469A CN112780469A CN202011163059.4A CN202011163059A CN112780469A CN 112780469 A CN112780469 A CN 112780469A CN 202011163059 A CN202011163059 A CN 202011163059A CN 112780469 A CN112780469 A CN 112780469A
- Authority
- CN
- China
- Prior art keywords
- roller
- injection pump
- diesel engine
- bush
- oil
- 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.)
- Pending
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 30
- 238000002347 injection Methods 0.000 title claims abstract description 28
- 239000007924 injection Substances 0.000 title claims abstract description 28
- 239000003921 oil Substances 0.000 abstract description 48
- 230000002159 abnormal effect Effects 0.000 abstract description 6
- 238000005299 abrasion Methods 0.000 abstract description 4
- 239000000295 fuel oil Substances 0.000 abstract description 2
- 230000007246 mechanism Effects 0.000 abstract description 2
- 239000010687 lubricating oil Substances 0.000 description 17
- 238000013461 design Methods 0.000 description 11
- 238000005461 lubrication Methods 0.000 description 10
- 230000001050 lubricating effect Effects 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 3
- 239000004744 fabric Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
- F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
- F02M59/102—Mechanical drive, e.g. tappets or cams
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/18—Lubricating
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention discloses a diesel engine fuel injection pump driving device, which comprises a roller component and a tappet, wherein the roller component comprises a roller pin, a roller bushing and a roller, and the roller pin is provided with an oil distribution groove; and a plurality of oil distribution holes are formed in the middle of the roller bush in the circumferential direction. The problem that the oil supply is relatively less when the fit clearance between the roller and the bush and between the bush and the roller pin reaches the two end faces of the roller can be solved, the problem that the oil supply is uneven when the fit clearance between the roller and the bush and between the bush and the roller pin reaches the two end faces of the roller due to part form and position tolerance is solved, and the abnormal abrasion problem is solved under the condition that the overall structure of the fuel oil driving mechanism is not changed.
Description
Technical Field
The invention belongs to the field of diesel engines, and particularly relates to a driving device for an oil injection pump of a diesel engine.
Background
The fuel injection pump of the high-power diesel engine usually adopts a monoblock pump, and each cylinder is provided with an independent fuel injection pump. The fuel injection pump is arranged on the upper plane of the engine body beside the cylinder cover and is driven by a fuel cam of the cam shaft through the roller component and the tappet. The roller components and the tappet are forcibly lubricated by adopting diesel engine lubricating oil. The lubrication of the roller assembly and the tappet is described below by taking a diesel engine of a certain type as an example.
As shown in figures 1, 2 and 3, the roller bushing, the roller pin and the tappet of a certain type of diesel engine are assembled together and reciprocate up and down together during operation. The roller pin and the tappet are in interference fit, the roller pin and the roller bushing and the roller pin are in clearance fit, and the tappet is prevented from rotating along the axis by positioning the roller pin through the positioning pin. In the operation process, the roller bushing and the roller pin are forcibly lubricated by adopting lubricating oil. The lubricating oil enters through the oil hole in the center of the roller pin, the end face of the roller is in clearance fit with the open end face of the tappet, a pair of friction pairs is formed during operation, the lubricating oil can only reach the two end faces of the roller through the fit clearance between the roller and the roller bushing and between the roller bushing and the roller pin, the oil supply is relatively less, and abnormal abrasion is easy to occur.
The diesel engine fuel injection pump is a core part of a diesel engine fuel system, directly influences the operation of a diesel engine, and can solve the problem of abnormal abrasion between a roller component and a tappet to determine whether the domestic development of the diesel engine of a certain model is successful or not.
The structure and the lubrication principle of the diesel engine are analyzed, the original roller and the tappet are in clearance fit, and lubricating oil flows to two end faces of the roller from the gaps between the roller pin and the roller bushing and between the roller bushing and the roller, but the gap is small and is influenced by the processing state of parts, particularly form and position tolerance, the lubrication condition of the end face of the roller is uncertain, and the quantity of the lubricating oil on two sides is also uncertain.
Disclosure of Invention
The invention provides a diesel engine fuel injection pump driving device, which can solve the problem that the fit clearance between a roller and a bush and the fit clearance between the bush and a roller pin reach the two end surfaces of the roller, and the problem that the oil supply is relatively less, solve the problem that the fit clearance between the roller and the bush and the fit clearance between the bush and the roller pin reach the two end surfaces of the roller due to the form and position tolerance of parts, and solve the problem of abnormal abrasion under the condition of keeping the overall structure of a fuel oil driving mechanism unchanged.
In order to solve the above technical problem, the following technical solutions are adopted in the embodiments of the present invention.
In a first aspect of the embodiments of the present invention, a diesel engine fuel injection pump driving device is provided, including a roller assembly and a tappet, where the roller assembly includes a roller pin, a roller bushing, and a roller, and the roller pin is provided with an oil distribution groove; and a plurality of oil distribution holes are formed in the middle of the roller bush in the circumferential direction.
In the embodiment provided by the invention, the oil distribution groove is a stepped oil distribution groove; the stepped oil distribution groove is provided with at least two steps; the step end face of the step-type oil distribution groove is arc-shaped.
In the embodiment provided by the invention, the number of the oil distribution holes is at least four. The number of the oil distributing holes is preferably eight; the oil distribution holes are uniformly distributed in the middle of the roller liner.
In a second aspect of the embodiment of the present invention, a diesel injection pump is further provided, including the above diesel injection pump driving apparatus.
According to the invention, through the design of the stepped roller pin lubricating oil groove, lubricating oil is directly conveyed between the end surface of the tappet and the roller bushing and between the roller and the tappet, so that the lubricating oil is ensured to reliably rush into the fit clearance between the end surface of the roller and the tappet, the oil supply quantity of the end surface can be increased, and the problem of uneven oil supply of the two end surfaces caused by the part processing state is avoided.
The invention also increases the oil distribution hole quantity and adjusts the oil distribution holes, thereby increasing the oil storage capacity and the effective oil distribution area of the oil holes at the roller bushing part and avoiding influencing the lubrication between the roller bushing and the roller when the end face lubricating oil quantity is increased.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a longitudinal sectional view of a prior art fuel injection pump assembly.
Fig. 2 is a cross-sectional view of a prior art fuel injection pump assembly.
Fig. 3 is a cross-sectional view of a prior art fuel injection pump roller hold-up.
FIG. 4 is a front view of a roll pin according to an embodiment of the present invention.
Fig. 5 is an enlarged view of a portion B in fig. 4.
Fig. 6 is a front view of a roller pillow case according to an embodiment of the present invention.
Fig. 7 is a cross-section taken in the direction a-a of fig. 6.
Fig. 8 is a cross-section in the direction B-B in fig. 6.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
In the description of the embodiments of the present invention, the meaning of "a plurality" means two or more unless otherwise specified.
As shown in fig. 1, 2, and 3, in the prior art, a tappet reciprocates up and down in a guide sleeve, a roller pin is in interference fit with a roller pin hole of the tappet, a roller bushing is installed between the roller pin and a roller, the roller bushing is in clearance fit with the outer diameter of the roller pin and an inner hole of the roller, forced lubrication is not adopted on the end surface of the roller in the prior art, the shape tolerance of the roller pin, the roller and the bushing is not considered for the roller, and the flow of lubricating oil flowing to the end surface of the roller has randomness.
Therefore, the embodiment of the invention provides a diesel engine fuel injection pump driving device, which comprises a roller assembly and a tappet, wherein the roller assembly comprises a roller pin, a roller bushing and a roller, and the roller pin is provided with an oil distribution groove; and a plurality of oil distribution holes are formed in the middle of the roller bush in the circumferential direction. The purpose is to solve the roller abnormal wear problem that actually appears, breaks through the design idea of traditional roller lubricating system, provides new design thinking to large-scale diesel engine roller lubrication, through the structural design of lubricating system part, solves between gyro wheel and gyro wheel bush, gyro wheel bush and the gyro wheel oil film uneven distribution, and the roller easily takes place abnormal wear problem to design and improvement for follow-up diesel engine lubricating system provides certain basis.
The technical solution of the present invention is described in detail below with reference to the accompanying drawings.
As shown in fig. 4 and 6, the invention provides a diesel engine fuel injection pump driving device, which comprises a roller assembly and a tappet, wherein the roller assembly comprises a roller pin 1, a roller bushing 6 and a roller, and the roller pin 1 is provided with an oil distribution groove 2; and a plurality of oil distribution holes 5 are additionally formed in the middle of the roller bush 6 in the circumferential direction.
The design of the invention realizes forced lubrication of the end surface of the roller:
the design of a stepped roller pin lubricating oil groove is adopted to reliably supply oil to the end face of the roller so as to forcibly lubricate the end face of the roller;
and determining the shape of the stepped oil groove of the roller pin and the number and the positions of the oil distribution holes of the roller bush according to the analysis of the contact stress between the roller pin and the roller bush and the analysis of the contact stress between the roller and the roller bush. The oil distribution groove will be described in detail below, as shown in fig. 4 and 5.
Optionally, in the embodiment provided by the present invention, the oil distribution groove 2 is a stepped oil distribution groove.
Optionally, in the embodiment provided by the present invention, the stepped oil distribution groove has at least two steps, and in the present invention, two steps are adopted, including the first step 3 and the second step 4, and of course, different numbers of steps can be selected according to different situations.
Optionally, in the embodiment provided by the present invention, a step end surface of the stepped oil distribution groove is arc-shaped.
Through the design of the stepped roller pin lubricating oil groove, lubricating oil is directly conveyed between the end face of the tappet and the roller bushing and between the end face of the tappet and the roller, so that the lubricating oil is ensured to reliably rush into a fit clearance between the end face of the roller and the tappet, the oil supply amount of the end face can be increased, and the problem of uneven oil supply of the two end faces caused by the part processing state is solved.
The oil distribution hole of the roller bush 6 will be described in detail below, as shown in fig. 6, 7, and 8.
Optionally, in the embodiment provided by the present invention, at least four oil distribution holes 5 are provided.
Optionally, in the embodiment provided by the present invention, the oil distribution holes 5 are preferably eight.
Optionally, in the embodiment provided by the present invention, the oil distribution holes 5 are uniformly distributed in the middle of the roller bushing.
Through increasing cloth oilhole quantity and adjusting the cloth oilhole to increase the oil storage capacity and the effective oil distribution area of bush position oilhole, avoid influencing the lubrication between gyro wheel bush and the gyro wheel when the terminal surface lubricating oil volume increases.
Compared with the prior art, the invention realizes the forced lubrication of the end surface of the roller, and the shape of the stepped oil groove and the number and the positions of the oil distribution holes of the roller bush are determined according to the analysis of the contact stress between the roller pin and the roller bush and between the roller and the roller bush during the design, thereby avoiding the problem of uneven oil supply of two end surfaces caused by the processing state of parts and avoiding the influence on the lubrication between the roller bush and the roller when the amount of lubricating oil on the end surface is increased.
The invention also provides a diesel engine fuel injection pump, which comprises the diesel engine fuel injection pump driving device.
The invention breaks through the problems existing in the traditional large diesel engine roller lubricating system design, and the design concept of the lubricating technology has wider application field and better popularization value.
While embodiments of the invention have been disclosed above, it is not limited to the applications listed in the description and the embodiments. It can be applied to all kinds of fields suitable for the present invention. Additional modifications will readily occur to those skilled in the art. It is therefore intended that the invention not be limited to the exact details and illustrations described and illustrated herein, but fall within the scope of the appended claims and equivalents thereof.
Claims (8)
1. The utility model provides a diesel engine injection pump drive arrangement, includes roller components and tappet, roller components includes gyro wheel round pin, gyro wheel bush and gyro wheel, its characterized in that:
the roller pin is provided with an oil distribution groove;
and a plurality of oil distribution holes are formed in the middle of the roller bush in the circumferential direction.
2. A diesel engine fuel injection pump drive as claimed in claim 1, wherein said fuel distribution groove is a stepped fuel distribution groove.
3. A diesel engine fuel injection pump actuator as set forth in claim 2, wherein said stepped fuel distribution groove has at least two steps.
4. A diesel engine fuel injection pump drive as claimed in claim 3, characterized in that the stepped oil distribution groove has a curved stepped end face.
5. The diesel engine fuel injection pump drive of claim 1, wherein said number of said fuel distribution holes is at least four.
6. The diesel engine fuel injection pump drive of claim 5, wherein the number of the fuel distribution holes is eight.
7. A diesel engine fuel injection pump drive as claimed in claim 5 or 6, characterized in that the fuel distribution openings are evenly distributed in the middle of the roller insert.
8. A diesel injection pump comprising the diesel injection pump driving apparatus of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011163059.4A CN112780469A (en) | 2020-10-27 | 2020-10-27 | Diesel engine fuel injection pump driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011163059.4A CN112780469A (en) | 2020-10-27 | 2020-10-27 | Diesel engine fuel injection pump driving device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112780469A true CN112780469A (en) | 2021-05-11 |
Family
ID=75750785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011163059.4A Pending CN112780469A (en) | 2020-10-27 | 2020-10-27 | Diesel engine fuel injection pump driving device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112780469A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114837865A (en) * | 2022-05-27 | 2022-08-02 | 陕西柴油机重工有限公司 | High-pressure oil pump oil-cut control device for emergency stop of diesel engine |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000014132U (en) * | 1998-12-29 | 2000-07-25 | 추호석 | Oil supply structure of rocker arm assembly |
| CN101280753A (en) * | 2008-05-19 | 2008-10-08 | 宁波中策动力机电集团有限公司 | Diesel engine oil jetting pump post rod parts |
| JP2011052571A (en) * | 2009-08-31 | 2011-03-17 | Mitsubishi Fuso Truck & Bus Corp | Lubrication oil supplying structure to cam slide-contact part |
| CN201786404U (en) * | 2010-09-28 | 2011-04-06 | 无锡锡州机械有限公司 | Tappet component provided with lubricating structure |
| CN102506000A (en) * | 2011-12-31 | 2012-06-20 | 中国兵器工业集团第七○研究所 | Pressure lubricating integral barrel-shaped tappet device |
| CN103343723A (en) * | 2013-07-31 | 2013-10-09 | 山东鑫亚工业股份有限公司 | Single body fuel injection pump self-lubricating tappet body roller |
| CN111472915A (en) * | 2020-05-28 | 2020-07-31 | 重庆红江机械有限责任公司 | Roller pin assembly, guide piston and fuel injection pump |
-
2020
- 2020-10-27 CN CN202011163059.4A patent/CN112780469A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000014132U (en) * | 1998-12-29 | 2000-07-25 | 추호석 | Oil supply structure of rocker arm assembly |
| CN101280753A (en) * | 2008-05-19 | 2008-10-08 | 宁波中策动力机电集团有限公司 | Diesel engine oil jetting pump post rod parts |
| JP2011052571A (en) * | 2009-08-31 | 2011-03-17 | Mitsubishi Fuso Truck & Bus Corp | Lubrication oil supplying structure to cam slide-contact part |
| CN201786404U (en) * | 2010-09-28 | 2011-04-06 | 无锡锡州机械有限公司 | Tappet component provided with lubricating structure |
| CN102506000A (en) * | 2011-12-31 | 2012-06-20 | 中国兵器工业集团第七○研究所 | Pressure lubricating integral barrel-shaped tappet device |
| CN103343723A (en) * | 2013-07-31 | 2013-10-09 | 山东鑫亚工业股份有限公司 | Single body fuel injection pump self-lubricating tappet body roller |
| CN111472915A (en) * | 2020-05-28 | 2020-07-31 | 重庆红江机械有限责任公司 | Roller pin assembly, guide piston and fuel injection pump |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114837865A (en) * | 2022-05-27 | 2022-08-02 | 陕西柴油机重工有限公司 | High-pressure oil pump oil-cut control device for emergency stop of diesel engine |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20210511 |