CN105422346B - Big flow, high rotating speed rotator type high-pressure common rail variable pump plunger matching parts - Google Patents
Big flow, high rotating speed rotator type high-pressure common rail variable pump plunger matching parts Download PDFInfo
- Publication number
- CN105422346B CN105422346B CN201510926807.2A CN201510926807A CN105422346B CN 105422346 B CN105422346 B CN 105422346B CN 201510926807 A CN201510926807 A CN 201510926807A CN 105422346 B CN105422346 B CN 105422346B
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- China
- Prior art keywords
- plunger
- tappet
- bushing
- variable pump
- rotating speed
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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
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Sealing Devices (AREA)
Abstract
The present invention includes plunger bushing and the plunger in the plunger cavity of plunger bushing, and it is sheathed on the tappet of plunger bushing middle and lower part periphery, plunger base is fixed in tappet by the ladder platform in tappet packing ring and tappet, tappet packing ring is removably attached to tappet inside bottom, the outer cover of tappet is provided with plunger spring, one end of plunger spring is fixed on the step bottom of plunger bushing, the other end is fixed at the top of the step on the outside of tappet, provided with oil input channel and oil road vertical with plunger cavity and communicated with plunger cavity epicoele in plunger bushing, there is bedding-in gap between plunger and plunger cavity, by reciprocating motion of the plunger in plunger cavity come oil suction and force feed, back oil road is provided with plunger bushing, back oil road communicates with the annular groove of plunger cavity bottom, between the back oil road and plunger bushing outer wall and bottom of back oil road is equipped with steel ball.The present invention reduces the contact stress of couple mating surface, reduces the abrasion of couple, maintain seal clearance, improve the fuel feeding efficiency and reliability of variable pump by the cooperation of each part.
Description
Technical field
The invention belongs to engine fuel system field, is total to more particularly, to a kind of big flow, high rotating speed rotator type high pressure
Rail variable pump plunger matching parts.
Background technology
With the continuous lifting to diesel engine properties demand, the pressure of diesel engine big-flow high-pressure common rail variable pump,
Flow, rotating speed improve therewith, and these improvement of high-pressure common rail variable pump considerably increase the risk of variable pump failure, such as post
Fill in couple clamping stagnation, coordinate surface wear, high pressure sealing leakage etc., cause the fuel feeding efficiency of variable pump to reduce, or even operational failure.
Different from small displacement variable pump, big flow variable pump uses oil lubricating more, and which increase by plunger matching parts gap
The diesel oil of leakage enters the risk of engine oil passage, influences other parts lubrication；In addition, variable pump piston structure is also mostly overall
Formula, plunger bottom surface directly contacts with cam mechanism during work, and particularly plunger passes through plunger with the frictional force on cam contact surface
The transmission of bar is applied directly in the mating surface of plunger matching parts, is increased contact stress on plunger rod and plunger bushing contact surface, is added
Fast abrasion, reduce the reliability of variable pump.
In view of the defect present on, it is even to invent a kind of big flow, high rotating speed rotator type high-pressure common rail variable pump plunger
Part, under conditions of structural strength is ensured, how to optimize design of part, and improve sealing structure, effectively improve variable pump operation
Reliability and fuel feeding efficiency, turn into the problem of those skilled in the art's research.
The content of the invention
In view of this, the present invention is intended to provide connecing on a kind of plunger matching parts contact surface when plunger up force feed is greatly reduced
Stress is touched, reduces the abrasion of plunger matching parts mating surface, maintains seal clearance, improves the plunger matching parts of the reliability of variable pump.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
A kind of big flow, high rotating speed rotator type high-pressure common rail variable pump plunger matching parts, including plunger bushing, plunger and very
Post, for the plunger in the plunger cavity of the plunger bushing, the tappet is sheathed on the periphery of the plunger bushing middle and lower part, described
The bottom of plunger is fixed in the tappet by the ladder platform in tappet packing ring and tappet, and the tappet packing ring is removably solid
The bottom being scheduled on the inside of the tappet, the outer cover of the tappet are provided with plunger spring, and one end of the plunger spring is fixed on
The step bottom of the plunger bushing, the other end are fixed at the top of the step on the outside of the tappet, are provided with and institute in the plunger bushing
The oil input channel and oil road that plunger cavity is vertical and is communicated with plunger cavity epicoele are stated, has bedding-in between the plunger and the plunger cavity
Gap, by reciprocating motion of the plunger in the plunger cavity come oil suction and force feed, back oil road is provided with the plunger bushing, it is described
Back oil road communicates with the annular groove of the plunger cavity bottom, is passed through by plunger and the fuel oil of plunger cavity clearance leakage during the up force feed of plunger
Annular groove and back oil road flow to the back oil road of variable pump, fuel tank are finally flowed back to, between the back oil road and the plunger bushing outer wall
And the bottom of the back oil road is equipped with steel ball, closure oil return circuit makes oil return in plunger bushing in the outlet of plunger bushing bottom
By the oil return circuit of design oil circuit entering variable pump.
The lower section of the annular groove is provided with O-shaped rubber seal ring recess in the plunger bushing, is set in the O-shaped rubber seal ring recess
There is O-shaped rubber seal.
Oil road diameter on the plunger bushing is less than oil input channel diameter.
During the plunger motion to lower dead center, the upper surface of the plunger is higher than the lower surface of the epicoele, and is less than institute
State the upper surface of oil input channel and the oil road；The epicoele diameter of the plunger bushing is more than the diameter of plunger.
Retain sharp edge at the epicoele diameter transition of the plunger bushing.
The plunger includes plunger rod and plunger disc, and the plunger rod and the plunger disc are split-type structural, the post
Plug disk is interference fitted in the bottom of the plunger rod.
The plunger upper and lower ends face edge rounding.
The tappet upper end wall is circumferential uniform multiple for lubricating plunger bushing outer wall and the lubrication hole of tappet inwall contact position；
The tappet inwall bottom is with nearby having circumferential uniform multiple hydraulic resistance balance grooves, the multiple fluid power at the plunger disc cooperation
The compensating groove multiple hydraulic resistance balance holes circumferentially uniform with the tappet outer wall bottom communicate.
The tappet packing ring is fixedly connected by jump ring with the tappet, and the tappet outer wall bottom is provided with two and jump ring
The connected jump ring handling hole of mounting groove, the jump ring handling hole is through hole.
The plunger bushing lower end edge plunger cavity is axially provided with sealing ring loading and unloading capacity groove to O-shaped rubber seal ring recess.
Relative to prior art, big flow of the present invention, high rotating speed rotator type high-pressure common rail variable pump are even with plunger
Part has the advantage that：
(1) it is separated by tappet packing ring between plunger and cam mechanism of the present invention, tappet packing ring contacts with cam mechanism, and with enduring
Post, plunger rod contacts coordinate, and tappet inwall and plunger bushing wall contacts；There is relative displacement in cam mechanism and tappet packing ring
When, the frictional force part that tappet packing ring is subject to can be transferred to plunger bushing outer wall by tappet, avoid tappet packing ring from being subject to all
Frictional force is transferred in plunger cavity wall through plunger, so as to reduce the contact stress in couple mating surface, reduces the abrasion of couple, dimension
Seal clearance is held, improves the fuel feeding efficiency and reliability of variable pump.
(2) O-shaped rubber seal has been added in plunger bushing, machine oil has been blocked into the oil circuit of diesel oil by sealing ring, with drop
Low consumption of lubricating oil, improve engine combustion.
(3) the oil road diameter on plunger bushing is less than oil input channel diameter, before oil suction efficiency and fuel flow communication is not influenceed
Put and reduce dead volume in plunger cavity, improve variable oil pump feed efficiency.
(4) during plunger motion to lower dead center, the upper intracavitary of the upper surface of plunger rod in plunger bushing；The epicoele of plunger bushing is straight
Footpath is more than diameter of plunger, can prevent plunger clamping stagnation when plunger force feed, diameter become big.
(5) sharp edge is retained at the epicoele diameter transition of plunger bushing, to strengthen the sealing in couple gap.
(6) plunger uses split modular structure, and plunger is made up of plunger rod and plunger disc, plunger diameter on active section
It is unchanged, it is more accurate so as to which dimensional tolerance is controlled, smaller plunger gap can be obtained, leakage is reduced, improves variable pump
Fuel feeding efficiency；Plunger disc is interference fitted in the bottom of the plunger rod, simple shape, is easy to processing, good manufacturability.
(7) plunger upper and lower ends face edge rounding, to reduce stress concentration when pressing oil.
(8) the circumferential uniform multiple lubrication holes for being used to lubricate plunger bushing outer wall and the contact pair of tappet inwall of tappet upper end wall,
To strengthen the lubrication between the two；Nearby have circumferential uniform multiple hydraulic resistance balance grooves at inwall bottom and plunger disc cooperation, it with
The circumferential uniform multiple hydraulic resistance balance holes in outer wall bottom communicate, and make plunger bushing, plunger and tappet institute shape during oil suction and force feed
Into sealing space in pressure balanced with extraneous, do not influence the motion of plunger.
(9) there are two through holes being connected with jump-ring slot tappet outer wall bottom, facilitates the dismounting of jump ring.Jump ring handling hole is set
Put, facilitate the handling of jump ring.
(10) sealing ring loading and unloading capacity groove, the dismounting of O-shaped rubber seal is facilitated.
(11) O-ring in plunger cavity annular groove is made up of wear-resisting, corrosion resistant rubber, improve sealing ring service life and
The reliability of variable pump.
(12) tappet packing ring is hard, wear-resistant material, improves the reliability of movement parts.
Brief description of the drawings
The accompanying drawing for forming the part of the present invention is used for providing a further understanding of the present invention, schematic reality of the invention
Apply example and its illustrate to be used to explain the present invention, do not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the profile of plunger bushing of the present invention；
Fig. 3 is the enlarged drawing in A portions in Fig. 2；
Fig. 4 is the longitudinal sectional drawing of plunger bushing other direction；
Fig. 5 be plunger bushing along B to profile；
Fig. 6 is the structural representation of plunger；
Fig. 7 is the left view of plunger；
Fig. 8 is the structural representation of tappet；
Fig. 9 is Fig. 8 profile；
Figure 10 is Fig. 9 left view.
1- plunger bushings, 2- plunger rods, 3-O types rubber seal, 4- tappets, 5- plunger discs, 6- jump rings, 7- tappets packing ring,
8- steel balls, 9- plunger springs, 11- oil input channels, 12- oil roads, 13- epicoeles, 14- back oil roads, 15- lubrication holes, 16- sharp edges, 17-
Annular groove, 18- sealing ring loading and unloading capacities groove, 19- plunger cavities, 21- roundings, 41- hydraulic resistance balances groove, 42- hydraulic resistance balances hole, 43-
Jump ring handling hole.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
Such as Fig. 1-10, a kind of big flow, high rotating speed rotator type high-pressure common rail variable pump plunger matching parts, including plunger bushing 1,
Plunger and tappet 4, in the plunger cavity 19 of the plunger bushing 1, the tappet 4 is sheathed in the plunger bushing 1 plunger
The periphery of bottom, the bottom of the plunger is fixed in the tappet 4 by the ladder platform in tappet packing ring 7 and tappet 4, described
Tappet packing ring 7 is removably attached to the bottom of the inner side of tappet 4, and the outer cover of the tappet 4 is provided with plunger spring 9, institute
The one end for stating plunger spring 9 is fixed on the step bottom of the plunger bushing 1, and the other end is fixed on the step in the outside of tappet 4
Top, the plunger bushing 1 are interior provided with oil input channel 11 and oil road vertical with the plunger cavity 19 and communicated with plunger cavity epicoele
12, have bedding-in gap between the plunger and the plunger cavity 19, by reciprocating motion of the plunger in the plunger cavity 19 come
Oil suction and force feed, the plunger bushing 1 is interior to be provided with back oil road 14, the back oil road 14 and the phase of annular groove 17 of the bottom of plunger cavity 19
Logical, between the back oil road 14 and the plunger bushing 1 outer wall and bottom of the back oil road 14 is equipped with steel ball 8.
The lower section of the annular groove 17 is provided with the O-shaped groove of rubber seal 3, the O-shaped rubber seal 3 in the plunger bushing 1
O-shaped rubber seal 3 is provided with groove.
The diameter of oil road 12 on the plunger bushing 1 is less than the diameter of oil input channel 11.
During the plunger motion to lower dead center, the upper surface of plunger is higher than the lower surface of the epicoele 13 in plunger bushing 1, and low
In the upper surface of oil input channel 11 and oil road 12；The diameter of 1 epicoele of plunger bushing 13 is more than diameter of plunger.The top of epicoele 13 be higher than into
The upper surface of oil duct 11 and oil road 12, lower surface of the bottom less than oil input channel 11 and oil road 12.
Retain sharp edge 16 at the diameter transition of 1 epicoele of plunger bushing 13.
The plunger includes plunger rod 2 and plunger disc 5, and the plunger rod 2 and the plunger disc 5 are split-type structural, institute
State the bottom that plunger disc 5 is interference fitted in the plunger rod 2.
The plunger upper and lower ends face edge rounding 21.
The circumferential uniform multiple lubrications for being used to lubricate the outer wall of plunger bushing 1 and the inwall contact position of tappet 4 of the upper end wall of tappet 4
Hole 15；The inwall bottom of tappet 4 is with nearby having circumferential uniform multiple hydraulic resistance balance grooves 41, institute at the cooperation of plunger disc 5
Multiple hydraulic resistance balance grooves 41 multiple hydraulic resistance balance holes 42 circumferentially uniform with the outer wall bottom of tappet 4 are stated to communicate.
The tappet packing ring 7 is fixedly connected by jump ring 6 with the tappet 4, the outer wall bottom of tappet 4 be provided with two with
The connected jump ring handling hole 43 of the mounting groove of jump ring 6, the jump ring handling hole 43 is through hole.
The lower end edge plunger cavity of plunger bushing 1 is axially provided with sealing ring loading and unloading capacity groove 18 to the O-shaped groove of rubber seal 3.
O-shaped rubber seal 3 in the annular groove 17 of plunger cavity 19 is made up of wear-resisting, corrosion resistant rubber.
The tappet packing ring 7 is hard, wear-resistant material.
Operation principle：Couple, plunger disc 5, tappet packing ring 7 together with plunger rod 2 are located at plunger bushing 1 respectively each other with plunger
On the corresponding cooperation position of tappet 4, finally kept off admittedly by jump ring 6, under the collective effect of cam mechanism and plunger spring 9, three
Interaction is moved simultaneously.
Plunger cavity bottom is provided with upper and lower twice annular groove 17, and upper annular groove 17 accepts the oil leak in plunger gap, and post is passed through in oil leak
Back oil road 14 in plug sleeve 1 flows out plunger bushing 1, into the sealing space formed by two O-rings, the variable pump housing, the body of plunger bushing 1
Afterwards, flowed into through the back oil road on the pump housing in fuel tank.Lower annular groove 17 is O-ring groove, installs O-shaped rubber seal 3 additional by plunger gap
The diesel oil on top and the machine oil isolation of bottom, the combination of two annular grooves 17 can prevent diesel oil from entering in engine oil passage, avoid changing
Oil formulation, influence the lubricant effect at other positions of engine.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
God any modification, equivalent substitution and improvements made etc., should be included in the scope of the protection with principle.
Claims (9)
1. a kind of big flow, high rotating speed rotator type high-pressure common rail variable pump plunger matching parts, it is characterised in that：Including plunger bushing,
Plunger and tappet, for the plunger in the plunger cavity of the plunger bushing, the tappet is sheathed on the plunger bushing middle and lower part
Periphery, the bottom of the plunger are fixed in the tappet by the ladder platform in tappet packing ring and tappet, the tappet packing ring
The bottom being removably attached on the inside of the tappet, the outer cover of the tappet are provided with plunger spring, the plunger spring
One end is fixed on the step bottom of the plunger bushing, and the other end is fixed at the top of the step on the outside of the tappet, the plunger bushing
The interior oil input channel and oil road communicated provided with epicoele vertical with the plunger cavity and with plunger bushing, the plunger and the plunger
There is bedding-in gap between chamber, by reciprocating motion of the plunger in the plunger cavity come oil suction and force feed, set in the plunger bushing
There is back oil road, the back oil road communicates with the annular groove of the plunger cavity bottom, between the back oil road and the plunger bushing outer wall
And the bottom of the back oil road is equipped with steel ball；
The plunger includes plunger rod and plunger disc, and the plunger rod and the plunger disc are split-type structural, the plunger disc
It is interference fitted in the bottom of the plunger rod.
2. big flow according to claim 1, high rotating speed rotator type high-pressure common rail variable pump plunger matching parts, its feature exist
In：The lower section of the annular groove is provided with O-shaped rubber seal ring recess in the plunger bushing, is provided with the O-shaped rubber seal ring recess O-shaped
Rubber seal.
3. big flow according to claim 1 or 2, high rotating speed rotator type high-pressure common rail variable pump plunger matching parts, it is special
Sign is：Oil road diameter on the plunger bushing is less than oil input channel diameter.
4. big flow according to claim 3, high rotating speed rotator type high-pressure common rail variable pump plunger matching parts, its feature exist
In：During the plunger motion to lower dead center, the upper surface of the plunger is higher than the lower surface of the epicoele, and is less than the oil-feed
The upper surface in road and the oil road；The epicoele diameter of the plunger bushing is more than the diameter of plunger.
5. big flow according to claim 4, high rotating speed rotator type high-pressure common rail variable pump plunger matching parts, its feature exist
In：Retain sharp edge at the epicoele diameter transition of the plunger bushing.
6. big flow according to claim 1, high rotating speed rotator type high-pressure common rail variable pump plunger matching parts, its feature exist
In：The plunger upper and lower ends face edge rounding.
7. big flow according to claim 6, high rotating speed rotator type high-pressure common rail variable pump plunger matching parts, its feature exist
In：The tappet upper end wall is circumferential uniform multiple for lubricating plunger bushing outer wall and the lubrication hole of tappet inwall contact position；It is described
Tappet inwall bottom is with nearby having circumferential uniform multiple hydraulic resistance balance grooves, the multiple hydraulic resistance balance at the plunger disc cooperation
The groove multiple hydraulic resistance balance holes circumferentially uniform with the tappet outer wall bottom communicate.
8. big flow according to claim 1, high rotating speed rotator type high-pressure common rail variable pump plunger matching parts, its feature exist
In：The tappet packing ring is fixedly connected by jump ring with the tappet, and the tappet outer wall bottom is provided with two and installed with jump ring
The connected jump ring handling hole of groove, the jump ring handling hole is through hole.
9. big flow according to claim 2, high rotating speed rotator type high-pressure common rail variable pump plunger matching parts, its feature exist
In：The plunger bushing lower end edge plunger cavity is axially provided with sealing ring loading and unloading capacity groove to O-shaped rubber seal ring recess.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510926807.2A CN105422346B (en) | 2015-12-11 | 2015-12-11 | Big flow, high rotating speed rotator type high-pressure common rail variable pump plunger matching parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510926807.2A CN105422346B (en) | 2015-12-11 | 2015-12-11 | Big flow, high rotating speed rotator type high-pressure common rail variable pump plunger matching parts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105422346A CN105422346A (en) | 2016-03-23 |
| CN105422346B true CN105422346B (en) | 2018-03-13 |
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|---|---|---|---|
| CN201510926807.2A Active CN105422346B (en) | 2015-12-11 | 2015-12-11 | Big flow, high rotating speed rotator type high-pressure common rail variable pump plunger matching parts |
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| CN (1) | CN105422346B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106499558A (en) * | 2017-01-04 | 2017-03-15 | 北京亚新科天纬油泵油嘴股份有限公司 | A kind of plunger matching parts of anti-leak oil-stain-preventing and apply its injection pump |
| CN107654481A (en) * | 2017-09-30 | 2018-02-02 | 中国北方发动机研究所(天津) | A kind of crank-shaft link neck oil pocket sealing structure |
| CN109653921A (en) * | 2018-10-30 | 2019-04-19 | 中国北方发动机研究所(天津) | A kind of injection pump plunger set of anti-plunger clamping stagnation |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9120601D0 (en) * | 1991-09-28 | 1991-11-06 | Lucas Ind Plc | Fuel pump |
| DE4237682A1 (en) * | 1992-11-07 | 1994-05-11 | Bosch Gmbh Robert | Fuel injection device, in particular rump nozzle for internal combustion engines |
| DE102011085605A1 (en) * | 2011-11-02 | 2013-02-07 | Continental Automotive Gmbh | Pump unit for fuel pump utilized in common-rail injection system for internal combustion engine of motor car, has spring assembly axially arranged between plunger and roller shoe to limit force transferred by roller shoe on pump piston |
| DE102012204264A1 (en) * | 2012-03-19 | 2013-09-19 | Robert Bosch Gmbh | high pressure pump |
| CN204126791U (en) * | 2014-07-25 | 2015-01-28 | 博世汽车柴油***有限公司 | High pressure fuel pump |
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2015
- 2015-12-11 CN CN201510926807.2A patent/CN105422346B/en active Active
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