CN202970990U - Oil absorption control device for high-pressure common rail pump - Google Patents
Oil absorption control device for high-pressure common rail pump Download PDFInfo
- Publication number
- CN202970990U CN202970990U CN 201220529559 CN201220529559U CN202970990U CN 202970990 U CN202970990 U CN 202970990U CN 201220529559 CN201220529559 CN 201220529559 CN 201220529559 U CN201220529559 U CN 201220529559U CN 202970990 U CN202970990 U CN 202970990U
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- Prior art keywords
- plunger
- ring
- oil suction
- common rail
- driving ring
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Abstract
The utility model discloses an oil absorption control device for a high-pressure common rail pump. The device comprises plunger pistons, a driving ring and a continuous control ring, wherein the three plunger pistons are uniformly arranged in the radial direction of a pump body at intervals; the driving ring is sleeved on the exterior of an eccentric cam shaft in the center of the pump body and can rotate together with a camshaft; the continuous control ring surrounds the exterior of the driving ring, and the tail part of the plunger piston is arranged in a sleeved manner and fixedly clamped between the driving ring and the continuous control ring; and during oil absorption stroke, the continuous control ring moves downwards with the driving ring and sequentially drives the three plunger pistons to move downwards perpendicularly so as to achieve oil absorption action. In the utility model, the design of a plunger spring in the prior art can be removed, the plunger pistons distributed in the radial direction can be fixed on the kinematic pair of a camshaft through the polygonal continuous control ring, so as to achieve oil absorption control, the wall thickness at the matched part of the pump body and the plunger pistons can be effectively enhanced, therefore, the maximal operating pressure of the pump body can be increased; and risks of fuel oil leakage of the oil pump can be effectively eliminated.
Description
Technical field
The utility model relates to the high voltage common rail pump field of fuel injector, particularly the oil suction control gear used of a kind of high voltage common rail pump.
Background technique
The high voltage common rail pump of traditional arranged radially plunger adopts piston spring to promote plunger and carries out the oil suction campaign.In existing high voltage common rail pump, the lower end of plunger is designed to a plane, is used for installing piston spring; Perhaps, design separately a spring lower seat, plunger is connected with spring lower seat by bindiny mechanism.During installation, piston spring is enclosed within the plunger bushing outside, the locating face of spring upper end and the pump housing (or plunger bushing) location of fitting, plane of orientation (or the spring lower seat plane of orientation) applying 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 for the parts installation needs, also need to leave the auxiliary hole that use is installed on the pump housing, blocks auxiliary hole after general assembly, like this risk that fuel oil leaks outside can occur; In addition, the characteristic of piston spring working speed of having determined oil pump etc. is restricted; In addition, due to the restriction that is subject to 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, the pressure capability that will cause oil pump to bear maximum is restricted, thereby has limited the Maximum operating pressure of high voltage common rail pump.
The model utility content
The utility model is in order to overcome defective in above-mentioned prior art, cancelled piston spring design of the prior art, by a polygonal control ring that connects, can be fixed on a plurality of radially-arranged plungers on the camshaft kinematic pair, completing oil suction controls, 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 realizing above-mentioned model utility purpose, the oil suction control gear that the utility model provides a kind of high voltage common rail pump to use, this device comprises: plunger, its quantity be three and along the pump housing radially evenly the interval arrange; 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 the 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 the control ring; During the oil suction stroke, move downward and drive successively three plungers with driving ring and vertically move down and complete the oil suction action thereby connect the control ring.The utility model has been cancelled piston spring design of the prior art, by a polygonal control ring that connects, three or more radially-arranged plungers is fixed on the camshaft kinematic pair.During work, connect the control ring and swing with the camshaft motion on the camshaft kinematic pair, and drive plunger and move downward and complete the oil suction action.After cancelling 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 the oil pump fuel oil leaks outside is eliminated.On structural design, due to the installing space that does not need to consider 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 the common rail pump of high workload pressure provides possibility in order to design more.
In technique scheme, the concrete assembly structure that connects the control ring is as follows: plunger tail is provided with annular groove, sheathed collar in annular groove, plunger is provided with the joint that connects the control ring and is connected supporting frame, connect supporting frame by collar with plunger with connect the control ring and fix to be connected and to be formed in the force feed stroke and control to connecting the support that encircles.
In technique scheme, connecting supporting frame bottom socket clamping has slide, and the slide upper surface contacts with plunger base, lower surface is a plane, and the slide lower surface contacts with the driving ring respective planes, but two planes relative sliding in the driving ring rotary course.
During assembling, plunger by collar be connected supporting frame and be connected, simultaneously with connect the control ring and form frictional fit.Below connecting supporting frame, 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 the force feed stroke, connects the control ring and follow camshaft and move upward; Through atdc, the camshaft drive connects to control under hoop moves, and connects the control ring and pulls the connection supporting frame, completes the oil suction stroke thereby the drive plunger moves downward.
In technique scheme, plunger surface can be covered with the DLC coating.
In technique scheme, plunger base can be provided be used to the projection of 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 the control ring and can adopt metal material; Also can adopt special plastic material, for example PEEK450CA30.
Compared with prior art, the utlity model 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 the plunger cooperation place, can improve the maximum service pressure of the pump housing;
3, eliminated because of the restriction of piston spring to performances such as maximum speeds, improved the performance of oil pump;
4, cancel the part such as installing technological hole, obstruction of piston spring, can effectively eliminate the risk that the oil pump fuel oil leaks outside.
Description of drawings
Fig. 1 is the oil pump layout of general plan of the company's of employing control ring design in the utility model oil suction control gear;
Fig. 2 connects in the utility model oil suction control gear to control the connection diagram of encircling with camshaft kinematic pair, plunger;
Fig. 3 is that the utility model connects the assembling detail schematic diagram control ring and plunger, collar, to be connected supporting frame.
Mark the following drawings mark thereon by reference to the accompanying drawings:
The 1-pump housing, the 2-plunger, the 3-oil sucting valve, 4-compresses plug screw, the 5-camshaft, 6-driving ring, 7-connect the control ring, the 8-collar, 9-connects supporting frame, 10-slide.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail, but is to be understood that protection domain of the present utility model is not subjected to the restriction of embodiment.
As shown in Figure 1, the oil suction control gear used of high voltage common rail pump of the present utility model 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 120 degree angle even interval settings.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, be equipped with driving ring 6 on the eccentric shaft of camshaft 5.Driving ring 6 can rotate along with the rotation of camshaft.Be processed with three dimensions on driving ring 6, be 120 and spend the angle layout.This three dimensions contacts with the slide 10 of plunger 2 bottoms all the time.When driving ring 6 moved with camshaft 5, this three dimensions was 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, during with camshaft 5 eccentric rotary, plunger 2 can be realized moving up and down in plunger hole along with the rotation of camshaft 5, completes the action of oil suction (moving downward), force feed (moving upward) when driving ring 6.
The working procedure of oil suction, force feed is as follows:
Plunger force feed stroke: camshaft 5 rotates up, and driving ring 6 is with camshaft 5 motion, and the slide 10 that the plane of driving ring 6 coordinates with plunger 2 bottoms connects, and promotion plunger 2 moves upward along plunger hole, moves thereby complete force feed.
Plunger oil suction stroke: by after peak, camshaft continues rotation when camshaft 5, and driving ring 6 is along with camshaft 5 moves downward.Connect control ring 7 along with driving ring 6 and two other plunger move downward together.The internal surface that connects control ring 7 contacts with being connected supporting frame 9, can drive plunger 2 and move downward.Complete the 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 the oil suction stroke began, oil sucting valve 3 was 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: near bottom position, be provided with an annular groove, sheathed collar 8 in annular groove at plunger 2.Plunger 2 be connected supporting frame 9 and fix by collar 2 and connect.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 motions; The lower surface of slide 10 contacts (referring to Fig. 2) with driving ring, can do horizontal fricting movement on driving ring 6, 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 the 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.Simultaneously, also will slide on driving ring 6, for this reason, slide bottom surface roughness is designed to Ra0.05.
Connecting control ring 7 replacement piston springs of the prior art is cores of the present utility model, be used for three plunger assemblies are assemblied in above driving ring 6, be used for simultaneously pulling plunger 2 to complete the oil suction stroke when plunger 2 is descending, so the crocking resistance of material, intensity etc. are had certain requirement.In the utility model, connect control ring 7 and can adopt metallic material, to guarantee required performance requirement.Simultaneously, after preventing that wherein a certain pair of plunger coupled parts is stuck, to control endless belt moving because connecting, the consequences that cause oil pump all to damage, and control encircles 7 also can adopt special plastic materials, for example PEEK450CA30.
The utility model is on structural design, due to the installing space that does not need to consider 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 the common rail pump of high workload pressure provides possibility in order to design more; In addition, after cancelling 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 the oil pump fuel oil leaks outside is eliminated.
Above disclosed be only a specific embodiment of the present utility model, still, the utility model is not limited thereto, the changes that any person skilled in the art can think of all should fall into protection domain of the present utility model.
Claims (8)
1. the oil suction control gear that high voltage common rail pump is used, is characterized in that, comprising:
Plunger, its quantity be three and along the pump housing radially evenly the interval arrange;
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 the 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 the control ring; During the oil suction stroke, thereby the described control ring that connects moves downward and drives successively described three plungers with driving ring and vertically moves down and complete the oil suction action.
2. the oil suction control gear used of high voltage common rail pump according to claim 1, it is characterized in that, described plunger tail is provided with annular groove, sheathed collar in annular groove, plunger is provided with the joint that connects the control ring and is connected supporting frame, described connection supporting frame by collar with plunger with connect the control ring and fix to be connected and to be formed in the force feed stroke and control to connecting the support that encircles.
3. the oil suction control gear used of high voltage common rail pump according to claim 2, 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 the driving ring respective planes, but two planes relative sliding in the driving ring rotary course.
4. the oil suction control gear that according to claim 1 to 3, the described high voltage common rail pump of any one is used is characterized in that described plunger surface is covered with the DLC coating.
5. the oil suction control gear used of high voltage common rail pump according to claim 3, is characterized in that, described plunger base is provided be used to the projection of optimizing stressed SR500～1000.
6. the oil suction control gear used of high voltage common rail pump according to claim 3, is characterized in that, the roughness of described slide bottom surface is Ra0.05.
7. the oil suction control gear that according to claim 1 to 3, the described high voltage common rail pump of any one is used is characterized in that, the described control ring that connects is metal material or plastic material.
8. the oil suction control gear used of high voltage common rail pump according to claim 7, is characterized in that, when connecting the control ring and adopt plastic material, described plastics are PEEK 450CA30.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220529559 CN202970990U (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 |
|---|---|---|---|
| CN 201220529559 CN202970990U (en) | 2012-10-16 | 2012-10-16 | Oil absorption control device for high-pressure common rail pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202970990U true CN202970990U (en) | 2013-06-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220529559 Expired - Lifetime CN202970990U (en) | 2012-10-16 | 2012-10-16 | Oil absorption control device for high-pressure common rail pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202970990U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470416A (en) * | 2013-09-26 | 2013-12-25 | 南岳电控(衡阳)工业技术有限公司 | Radial plunger piston oil supplying pump applied to high-pressure common-rail fuel oil injection system |
| CN103726964A (en) * | 2012-10-16 | 2014-04-16 | 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 |
| CN104373269A (en) * | 2013-08-14 | 2015-02-25 | 北京亚新科天纬油泵油嘴股份有限公司 | Return oil system of high-pressure common rail pump |
-
2012
- 2012-10-16 CN CN 201220529559 patent/CN202970990U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103726964A (en) * | 2012-10-16 | 2014-04-16 | 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 |
| CN104373269A (en) * | 2013-08-14 | 2015-02-25 | 北京亚新科天纬油泵油嘴股份有限公司 | Return oil system of high-pressure common rail pump |
| CN104373269B (en) * | 2013-08-14 | 2017-06-06 | 北京亚新科天纬油泵油嘴股份有限公司 | High voltage common rail pump oil return system |
| CN103470416A (en) * | 2013-09-26 | 2013-12-25 | 南岳电控(衡阳)工业技术有限公司 | Radial plunger piston oil supplying pump applied to high-pressure common-rail fuel oil injection system |
| CN103470416B (en) * | 2013-09-26 | 2016-08-17 | 南岳电控（衡阳）工业技术股份有限公司 | A kind of radial plunger oil feed pump being applied to high pressure common rail fuel injection system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: ILIJADJORDJEVIC Inventor after: Li Jun Inventor after: Wang Shanshan Inventor after: Chen Jun Inventor before: ILIJADJORDJEVIC Inventor before: Wang Shanshan Inventor before: Chen Jun |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: PERTTI HALLVILLE WANG SHANSHAN CHEN JUN TO: PERTTI HALLVILLE LI JUN WANG SHANSHAN CHEN JUN |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180719 Address after: 300000 2 Yulong Road, automobile industrial park, Wuqing District, Tianjin Patentee after: BEIYOU ELECTRONIC CONTROL FUEL INJECTION SYSTEM (TIANJIN) Co.,Ltd. Address before: No. 3, courtyard, Cheng Zhuang Road, Fengtai District, Beijing Patentee before: ASIMCO TIANWEI FUEL INJECTION EQUIPMENT STOCK Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130605 |