CN103726964A - Oil absorption control device for high-pressure common rail pump - Google Patents
Oil absorption control device for high-pressure common rail pump Download PDFInfo
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- CN103726964A CN103726964A CN201210394091.2A CN201210394091A CN103726964A CN 103726964 A CN103726964 A CN 103726964A CN 201210394091 A CN201210394091 A CN 201210394091A CN 103726964 A CN103726964 A CN 103726964A
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- plunger
- ring
- oil suction
- common rail
- high voltage
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Abstract
The invention discloses an oil absorption control device for a high-pressure common rail pump. The oil absorption control device comprises plungers, a drive ring and a connecting control ring. The three plungers are evenly arranged at intervals in the radial direction of a pump body; an eccentric cam shaft located at the center of the pump body is sleeved with the drive ring, and the drive ring rotates along with the cam shaft; the connecting control ring surrounds the drive ring, and the tails of the plungers are arranged and clamped between the drive ring and the connecting control ring in a sleeved mode; in the oil absorption process, the connecting control ring moves downwards along with the drive ring and sequentially drives the three plungers to perpendicularly move downwards to finish oil absorption action. According to the oil absorption control device, plunger springs in the prior art are omitted, the multiple plungers which are distributed in the radial direction can be fixed to a joint of the cam shaft to finish oil absorption control through the polygonal connecting control ring, the thickness of the wall of the matching positions of the pump body and the plungers can be effectively increased, and then the maximum working pressure of the pump body is increased, and the risk that fuel oil of the oil pump leaks outwards can be effectively eliminated.
Description
Technical field
The present invention relates to the high voltage common rail pump field of fuel injector, the oil suction control gear that particularly a kind of high voltage common rail pump is used.
Background technique
The high voltage common rail pump of traditional arranged radially plunger, adopts piston spring to promote plunger and carries out oil suction campaign.In existing high voltage common rail pump, the lower end of plunger is designed to a plane, for piston spring is installed; Or, designing separately a spring lower seat, plunger is connected with spring lower seat by bindiny mechanism.During installation, piston spring is enclosed within plunger bushing outside, the locating face laminating location of spring upper end and the pump housing (or plunger bushing), plane of orientation (or the spring lower seat plane of orientation) laminating of spring lower end and plunger lower end.When camshaft promotion plunger is up (plunger force feed), piston spring is also simultaneously compressed; Through atdc, under the elastic force effect of piston spring, promote plunger descending along cam-shaped line, complete oil-absorbing process.
The mounting structure of this piston spring causes amount of parts a lot, needs larger installing space, and installs and need for parts, also need on the pump housing, output the auxiliary hole that use is installed, and blocks auxiliary hole after general assembly, and the risk that fuel oil leaks outside can occur like this; In addition, working speed that the characteristic of piston spring has determined oil pump etc. is restricted; In addition, owing to being subject to the restriction of bulk, the wall thickness of the pump housing (or plunger bushing) and plunger mating part is because need the space to be preserved of mounting spring, make the wall thickness attenuation of the pump housing, by causing oil pump to bear maximum pressure capability, be restricted, thereby limited the Maximum operating pressure of high voltage common rail pump.
Summary of the invention
The present invention is in order to overcome defect in above-mentioned prior art, cancelled piston spring design of the prior art, by a polygonal control ring that connects, multiple radially-arranged plungers can be fixed on camshaft kinematic pair, complete oil suction control, its project organization is simple and can effectively increase the wall thickness of the pump housing and plunger cooperation place, thus the maximum service pressure of the raising pump housing.
For achieving the above object, the invention provides the oil suction control gear that a kind of high voltage common rail pump is used, this device comprises: plunger, and its quantity is three and arranges along the radially even interval of the pump housing; Driving ring, it is set in the outside of the eccentric cam shaft that is positioned at pump housing central authorities, and rotates with camshaft; Connect control ring, it is enclosed in the outside of driving ring, and the afterbody of plunger is sheathed and fix at driving ring and connect between control ring; During oil suction stroke, thereby moving downward and drive successively three plungers vertically to move down with driving ring, company's control ring completes oil suction action.The present invention has cancelled piston spring design of the prior art, by a polygonal control ring that connects, three or more radially-arranged plungers is fixed on camshaft kinematic pair.During work, connect control ring and with camshaft motion, swing on camshaft kinematic pair, and drive plunger to move downward oil suction action.Cancel after piston spring, the assembling of high voltage common rail pump becomes simply, has cancelled auxiliary hole and obstruction that piston spring is installed, and the risk that oil pump fuel oil leaks outside is eliminated.In structural design, owing to not needing to consider the installing space of piston spring, it is very thick that the wall thickness of plunger and the pump housing (or plunger bushing) cooperation place can design, and the pressure maximum that oil pump can bear improves a lot, and for designing the more common rail pump of high workload pressure, provides possibility.
In technique scheme, the concrete assembly structure that connects control ring is as follows: plunger tail is provided with annular groove, sheathed collar in annular groove, plunger is provided with and is connected supporting frame with the joint that connects control ring, connect supporting frame by collar by plunger with connect control ring and fix to be connected and to be formed in force feed stroke and control to connecting the support encircling.
In technique scheme, connecting the socket clamping of supporting frame bottom has slide, and slide upper surface contacts with plunger base, lower surface is a plane, and slide lower surface contacts with driving ring respective planes, and two planes can relative sliding in driving ring rotary course.
During assembling, plunger by collar be connected supporting frame and be connected, simultaneously with connect control ring and form frictional fit.Connect supporting frame below slide is housed, slide and camshaft kinematic pair are slidably matched.In camshaft when motion,, promote slide, promotes in linkage plunger and move upward, and completes force feed stroke, connects control ring and follow camshaft and move upward; Through atdc, camshaft drives to connect to control to encircle and moves downward, and connect control ring and pull connection supporting frame, thereby drive plunger has moved downward oil suction stroke.
In technique scheme, plunger surface can be covered with DLC coating.
In technique scheme, plunger base can be provided with the projection for optimizing stressed SR500～1000.The roughness of slide bottom surface can be designed to Ra0.05.
In technique scheme, due to the needs of performance requirement, connect control ring and can adopt metal material; Also can adopt special plastic material, for example PEEK 450CA30.
Compared with prior art, the present invention has following beneficial effect:
1, with respect to prior art, cancelled piston spring, effectively reduced number of spare parts, reduce failure risk, saved cost;
2, increase the wall thickness of the pump housing (or plunger bushing) with plunger cooperation place, can improve the maximum service pressure of the pump housing;
3, eliminated because the restriction of piston spring to performances such as maximum speeds improved oily pump performance;
4, cancel the part such as installing technological hole, obstruction of piston spring, can effectively eliminate the risk that oil pump fuel oil leaks outside.
Accompanying drawing explanation
Fig. 1 is the oil pump layout of general plan of the company's of employing control ring design in oil suction control gear of the present invention;
Fig. 2 connects in oil suction control gear of the present invention to control the connection diagram of encircling with camshaft kinematic pair, plunger;
Fig. 3 is that the present invention connects the assembling detail schematic diagram of controlling ring and plunger, collar, being connected supporting frame.
Mark the following drawings mark thereon by reference to the accompanying drawings:
The 1-pump housing, 2-plunger, 3-oil sucting valve, 4-compresses plug screw, 5-camshaft, 6-driving ring, 7-connects control ring, 8-collar, 9-connects supporting frame, 10-slide.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail, but is to be understood that protection scope of the present invention is not subject to the restriction of embodiment.
As shown in Figure 1, the oil suction control gear that high voltage common rail pump of the present invention is used comprises plunger 2, camshaft 5, driving ring 6 and connects control ring 7.The integral layout of oil suction control gear is as follows: plunger 2 quantity are three, and along the radial arrangement of pump body 1, three plungers 2 are the 120 even intervals of degree angle and arrange.Eccentric camshaft 5 is arranged in oil pump central authorities (referring to Fig. 1, the running shaft decentraction of the center of camshaft 5 and the pump housing 1), and camshaft 5 two ends are arranged on (not shown) on the support zone at oil pump two ends.
Further as shown in Figure 1, on the eccentric shaft of camshaft 5, be equipped with driving ring 6.Driving ring 6 can rotate along with the rotation of camshaft.On driving ring 6, be processed with three planes, be 120 degree angles and arrange.These three planes contact with the slide 10 of plunger 2 bottoms all the time.When driving ring 6 moves with camshaft 5, these three planes are vertical with plunger 2 all the time.
Further as shown in Figure 1, 2, connect control ring 7 and be enclosed in driving ring 6 outsides, plunger tail is sheathed and fix at driving ring 6 and connect between control ring 7.Like this, three plungers 2 are controlled ring 7 by company and have been assembled on driving ring 6, when driving ring 6 is during with camshaft 5 eccentric rotary, plunger 2 can be realized and moving up and down along with the rotation of camshaft 5 in plunger hole, completes the action of oil suction (moving downward), force feed (moving upward).
The working procedure of oil suction, force feed is as follows:
Plunger force feed stroke: camshaft 5 rotates up, driving ring 6 moves with camshaft 5, and the plane of driving ring 6 connects with the slide 10 that plunger 2 bottoms coordinate, and promotes plunger 2 and moves upward along plunger hole, thereby complete force feed action.
Plunger oil suction stroke: when camshaft 5 is by after peak, camshaft continues rotation, and driving ring 6 is along with camshaft 5 moves downward.Move downward together with driving ring 6 and two other plunger with control ring 7.The internal surface that connects control ring 7 contacts with being connected supporting frame 9, can drive plunger 2 to move downward.Complete oil suction action.Due to the wobbler action of camshaft 5, along with camshaft rotates, three plungers carry out the action of force feed, oil suction successively.Plunger head is provided with oil sucting valve 3 and compresses plug screw 4, and when oil suction stroke starts, oil sucting valve 3 is in open mode, so that fuel oil enters.
Further as shown in Figure 3, plunger 2 is as follows with the fixing assembly structure that connects control ring 7: at plunger 2, near bottom position, be provided with an annular groove, sheathed collar 8 in annular groove.Plunger 2 be connected supporting frame 9 and fix and connect by collar 2.Slide 10 is compressed into and is connected supporting frame 9, and the upper surface of slide 10 contacts with the lower surface of plunger 2, can be used for promoting plunger 2 and moves; The lower surface of slide 10 contacts (referring to Fig. 2) with driving ring, can on driving ring 6, do horizontal fricting movement, and transmits the Driving force of driving ring 6.Connect control ring 7 and the upper surface contact that is connected supporting frame 9, three plunger assemblies are assemblied on driving ring 6, in the descending stage of driving ring 6, connect control ring 7 and be responsible for pulling plunger 2 downwards, play the return effect of piston spring.
For guaranteeing the durability of plunger 2, plunger surface adopts DLC coating.It is sphericity unit that plunger base is designed to SR500～1000(SR) projection, optimize stressed.Slide 10 plays a part transmission power at work., also will on driving ring 6, slide, for this reason, slide bottom surface roughness is designed to Ra0.05 meanwhile.
Connecting control ring 7 replacement piston spring of the prior art is core of the present invention, for three plunger assemblies are assemblied in above driving ring 6, for when plunger 2 is descending, pull plunger 2 to complete oil suction stroke, so crocking resistance to material, intensity etc. have certain requirement simultaneously.In the present invention, connect control ring 7 and can adopt metallic material, to guarantee required performance requirement.Meanwhile, after preventing that wherein a certain pair of plunger coupled parts is stuck, because connecting, to control endless belt moving, the consequences that cause oil pump all to damage, and control encircles 7 also can adopt special plastic materials, for example PEEK 450CA30.
The present invention is in structural design, owing to not needing to consider the installing space of piston spring, it is very thick that the wall thickness of plunger and the pump housing (or plunger bushing) cooperation place can design, and the pressure maximum that oil pump can bear improves a lot, and for designing the more common rail pump of high workload pressure, provides possibility; In addition, cancel after piston spring, the assembling of high voltage common rail pump becomes simply, has cancelled auxiliary hole and obstruction that piston spring is installed, and the risk that oil pump fuel oil leaks outside is eliminated.
Disclosed is above only a specific embodiment of the present invention, and still, the present invention is not limited thereto, and the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.
Claims (8)
1. the oil suction control gear that high voltage common rail pump is used, is characterized in that, comprising:
Plunger, its quantity is three and arranges along the radially even interval of the pump housing;
Driving ring, it is set in the outside of the eccentric cam shaft that is positioned at described pump housing central authorities, and rotates with described camshaft;
Connect control ring, it is enclosed in the outside of described driving ring, and the afterbody of described plunger is sheathed and fix at driving ring and connect between control ring; During oil suction stroke, thereby moving downward and drive successively described three plungers vertically to move down with driving ring, described even control ring completes oil suction action.
2. the oil suction control gear that high voltage common rail pump according to claim 1 is used, it is characterized in that, described plunger tail is provided with annular groove, sheathed collar in annular groove, plunger is provided with and is connected supporting frame with the joint that connects control ring, described connection supporting frame by collar by plunger with connect control ring and fix to be connected and to be formed in force feed stroke and control to connecting the support encircling.
3. the oil suction control gear that high voltage common rail pump according to claim 2 is used, it is characterized in that, the socket clamping of described connection supporting frame bottom has slide, described slide upper surface contacts with plunger base, lower surface is a plane, described slide lower surface contacts with driving ring respective planes, and two planes can relative sliding in driving ring rotary course.
4. the oil suction control gear of using according to the high voltage common rail pump described in any one in claims 1 to 3, is characterized in that, described plunger surface is covered with DLC coating.
5. the oil suction control gear that high voltage common rail pump according to claim 3 is used, is characterized in that, described plunger base is provided with the projection for optimizing stressed SR500～1000.
6. the oil suction control gear that high voltage common rail pump according to claim 3 is used, is characterized in that, the roughness of described slide bottom surface is Ra0.05.
7. the oil suction control gear of using according to the high voltage common rail pump described in any one in claims 1 to 3, is characterized in that, the described control ring that connects is for metal material or plastic material.
8. the oil suction control gear that high voltage common rail pump according to claim 7 is used, is characterized in that, when connecting control ring employing plastic material, described plastics are PEEK 450CA30.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210394091.2A CN103726964A (en) | 2012-10-16 | 2012-10-16 | Oil absorption control device for high-pressure common rail pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210394091.2A CN103726964A (en) | 2012-10-16 | 2012-10-16 | Oil absorption control device for high-pressure common rail pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103726964A true CN103726964A (en) | 2014-04-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210394091.2A Pending CN103726964A (en) | 2012-10-16 | 2012-10-16 | Oil absorption control device for high-pressure common rail pump |
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| CN (1) | CN103726964A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2540548A (en) * | 2015-07-20 | 2017-01-25 | Delphi Int Operations Luxembourg Sarl | Novel pump design |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7384246B2 (en) * | 2001-10-15 | 2008-06-10 | Robert Bosch Gmbh | Pump element and piston pump for generating high fuel pressure |
| WO2009115353A1 (en) * | 2008-03-17 | 2009-09-24 | Robert Bosch Gmbh | High-pressure pump |
| JP2010203361A (en) * | 2009-03-04 | 2010-09-16 | Honda Motor Co Ltd | Fuel supply pump |
| CN202970990U (en) * | 2012-10-16 | 2013-06-05 | 北京亚新科天纬油泵油嘴股份有限公司 | Oil absorption control device for high-pressure common rail pump |
-
2012
- 2012-10-16 CN CN201210394091.2A patent/CN103726964A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7384246B2 (en) * | 2001-10-15 | 2008-06-10 | Robert Bosch Gmbh | Pump element and piston pump for generating high fuel pressure |
| WO2009115353A1 (en) * | 2008-03-17 | 2009-09-24 | Robert Bosch Gmbh | High-pressure pump |
| JP2010203361A (en) * | 2009-03-04 | 2010-09-16 | Honda Motor Co Ltd | Fuel supply pump |
| CN202970990U (en) * | 2012-10-16 | 2013-06-05 | 北京亚新科天纬油泵油嘴股份有限公司 | Oil absorption control device for high-pressure common rail pump |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2540548A (en) * | 2015-07-20 | 2017-01-25 | Delphi Int Operations Luxembourg Sarl | Novel pump design |
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Application publication date: 20140416 |