CN202012427U - Common-rail high-pressure pump with integrated pump and rail - Google Patents
Common-rail high-pressure pump with integrated pump and rail Download PDFInfo
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- CN202012427U CN202012427U CN201120052744XU CN201120052744U CN202012427U CN 202012427 U CN202012427 U CN 202012427U CN 201120052744X U CN201120052744X U CN 201120052744XU CN 201120052744 U CN201120052744 U CN 201120052744U CN 202012427 U CN202012427 U CN 202012427U
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Abstract
The utility model relates to a common-rail high-pressure pump with a pump and a rail which are integrated with each other. A rail body is fixedly connected to the top of the pump body; a plunger sleeve is fixedly connected to the upper part of the inner cavity of the pump body; an oil inlet valve, an oil outlet valve and an oil outlet valve core pressing device are installed between the valve cavity of the plunger sleeve and the rail body; an oil inlet valve core pressing device is arranged inside the inner cavity of the oil outlet valve; the oil inlet valve and the oil outlet valve are sequentially installed inside the valve cavity of the plunger sleeve from the bottom up; the top surface of the oil outlet valve is higher than the top surface of the plunger sleeve and contacts the bottom surface of the rail body; and the oil outlet valve core pressing device is arranged inside the rail body. Through the structure that the oil outlet valve core pressing device is arranged inside the rail body, the integral height of an oil pump is lowered and the probability of interfering with the body of an engine is reduced; meanwhile, the material cost and the processing cost of the pump body and the plunger sleeve are reduced; and in addition, the high-pressure sealing surface is reduced and the sealing performance is improved.
Description
Technical field
The utility model relates to the high-pressure service pump and the rail of common rail for diesel engine system, specifically a kind of common-rail high-pressure pump of pump rail one.
Background technique
The common rail for diesel engine system is by high-pressure service pump, rail, oil sprayer and ECU(controller) four big parts form.High-pressure service pump is pressurized to 30 ~ 200Mpa with fuel oil, and is stored in the rail, and the oil sprayer by solenoid-driven sprays into cylinder of diesel engine.ECU realizes the fuel pressure control that rail is interior by the flow of control high-pressure service pump, and the break-make of control fuel injector magnetic system realizes quantitatively and timed injection.
The general split design of high-pressure service pump and rail connects by oil pipe.In the prior art, for compact structure and reducing cost, the common-rail high-pressure pump that high-pressure service pump and rail are combined into one is also arranged, as shown in Figure 1.The structure of this common-rail high-pressure pump is the top that rail body 15 directly is connected the pump housing 1, and the top of the pump housing 1 inner chamber is fixedly connected with plunger bushing 5, and oiling valve 6, outlet valve 10 and oil outlet valve spring cover 13 are installed in the valve pocket of plunger bushing 5 from bottom to top successively.The major defect of this common-rail high-pressure pump is: owing to increased rail body 15 at the top of the pump housing 1, whole height increases to some extent with respect to independent high-pressure service pump, and body easy and motor is interfered.In addition, this high-pressure service pump between the bottom of the valve pocket of plunger bushing 5 bottom and oiling valve 6, between the bottom of the top of oiling valve 6 and outlet valve 10, the top and the oil outlet valve spring of outlet valve 10 overlap between 13 the bottom and oil outlet valve spring overlaps four high pressure sealing face A of existence between the bottom of 13 top and rail body 15, sealing surface is many, is difficult to guarantee the sealing of high-pressure service pump.
Summary of the invention
The utility model provides a kind of common-rail high-pressure pump of pump rail one at the problems referred to above, and the whole height of this common-rail high-pressure pump is low, and is little with the engine body possibility of interference.
According to the technical solution of the utility model: a kind of common-rail high-pressure pump of pump rail one, roof anchorage at the pump housing connects the rail body, the top of described pump housing inner chamber is fixedly connected with plunger bushing, oiling valve, outlet valve and outlet valve spool hold down gag are installed between the valve pocket of described plunger bushing and the described rail body, are provided with oiling valve spool hold down gag in the inner chamber of described outlet valve; Described oiling valve and described outlet valve are installed in the valve pocket of described plunger bushing from bottom to top successively, the end face of described outlet valve exceeds the end face of described plunger bushing and contacts with the bottom surface of described rail body, and described outlet valve spool hold down gag is arranged in the described rail body.
Be provided with the spring housing mounting hole that is communicated with rail body cavity quadrature in the described rail body, described outlet valve spool hold down gag is installed in described spring housing mounting hole and the described rail body cavity.
Described outlet valve spool hold down gag comprises oil outlet valve spring cover, oil outlet valve spring seat and oil outlet valve spring; Described oil outlet valve spring cover is inserted in the described spring housing mounting hole for cylindrical shape, and the upper bottom surface of described oil outlet valve spring cover has the spring seat mounting hole with the spring housing intracavity inter-connection, has the spring housing oilhole with described spring housing intracavity inter-connection on its wall; Described oil outlet valve spring seat is a multidiameter shaft shape, comprise the spindle nose that links to each other successively, big shaft part and little shaft part, the outer end of described spindle nose is resisted against on the inwall of described rail body cavity, described big shaft part is engaged in the described spring seat mounting hole, described little shaft part is set with oil outlet valve spring outward, and the end of described oil outlet valve spring is resisted against on the outlet valve spool.
The outer end of described spindle nose is spherical.Described little shaft part is little, the inner big taper shape in outer end.Offer the spring seat oilhole on the described little shaft part.Described outlet valve spool is the outlet valve steel ball.Described oiling valve spool hold down gag comprises oiling valve spring and oiling valve spring seat, described oiling valve spring seat is installed in the inner chamber of described outlet valve, described oiling valve spring housing is contained in outside the described oiling valve spring seat, and the end of described oiling valve spring is resisted against on the oiling valve spool.Described oiling valve spool is the oiling valve steel ball.Be threaded between the top of the top of described plunger bushing and described pump housing inner chamber.
Technique effect of the present utility model is: the utility model is arranged on outlet valve spool hold down gag in the rail body, has reduced the whole height of oil pump, has reduced the possibility of interfering with engine body; The height of the pump housing and plunger bushing has all descended, and has reduced the material and the processing cost of part; High pressure sealing face is kept to three by four, has improved sealing.
Description of drawings
Fig. 1 is the structural representation of existing common-rail high-pressure pump.
Fig. 2 is a structural representation of the present utility model.
Fig. 3 is the schematic cross-section of the rail body in the utility model.
Fig. 4 is the enlarged view of the oil outlet valve spring seat in the utility model.
Fig. 5 is the enlarged view of the oil outlet valve spring cover in the utility model.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is further described.
Among Fig. 1 ~ Fig. 4, comprise the pump housing 1, camshaft 2, tappet 3, plunger 4, plunger bushing 5, oiling valve 6, oiling valve steel ball 7, oiling valve spring 8, oiling valve spring seat 9, outlet valve 10, outlet valve steel ball 11, oil outlet valve spring 12, oil outlet valve spring cover 13, oil outlet valve spring seat 14, rail body 15, go out oil pocket 16, plunger cavity 17, rail body cavity 18, spring housing mounting hole 19, spindle nose 20, big shaft part 21, little shaft part 22, spring seat oilhole 23, spring seat mounting hole 24, spring housing oilhole 25, spring housing inner chamber 26 etc.
As shown in Figure 2, the utility model is a kind of common-rail high-pressure pump of pump rail one.The top of the pump housing 1 connects rail body 15 by screw, and the top of the pump housing 1 is provided with columnar inner chamber, the top of this cylindrical cavity plunger bushing 5 that has been threaded.The top of plunger bushing 5 is provided with valve pocket, its underpart is provided with the plunger cavity 17 that is connected with this valve pocket, is sliding combined with plunger 4 in the plunger cavity 17, and the lower end of plunger 4 is equipped with tappet 3, tappet 3 is resisted against on the cam, and cam is provided with on the camshaft 2 that level is installed in the pump housing 1 lower cam chamber.
Oiling valve 6, outlet valve 10 and outlet valve spool hold down gag are installed between the valve pocket of plunger bushing 5 and the rail body 15.Oiling valve 6 and outlet valve 10 are installed in the valve pocket of plunger bushing 5 from bottom to top successively.The end face of outlet valve 10 exceeds the end face of plunger bushing 5 and contacts with the bottom surface of rail body 15.
Outlet valve spool hold down gag is arranged in the rail body 15.As shown in Figure 3, be provided with the spring housing mounting hole 19 that is communicated with rail body cavity 18 quadratures in the rail body 15, outlet valve spool hold down gag is installed in spring housing mounting hole 19 and the rail body cavity 18.Above-mentioned outlet valve spool hold down gag comprises oil outlet valve spring cover 13, oil outlet valve spring seat 14 and oil outlet valve spring 12.
As shown in Figure 5, oil outlet valve spring cover 13 is a cylindrical shape, is inserted in the spring housing mounting hole 19.The upper bottom surface of oil outlet valve spring cover 13 has the spring seat mounting hole 24 that is connected with spring housing inner chamber 26, has the spring housing oilhole 25 that is connected with spring housing inner chamber 26 on its wall.
As shown in Figure 4, oil outlet valve spring seat 14 is a multidiameter shaft shape, comprises the spindle nose 20 that links to each other successively, big shaft part 21 and little shaft part 22.The outer end of spindle nose 20 is preferably spherical, is resisted against on the inwall of rail body cavity 18.Big shaft part 21 is engaged in the spring seat mounting hole 24, is set with oil outlet valve spring 12 outside the little shaft part 22, and the end of oil outlet valve spring 12 is resisted against on the outlet valve spool, and the outlet valve spool is preferably outlet valve steel ball 11.
Little shaft part 22 is preferably little, the inner big taper shape in outer end, and oil outlet valve spring 12 is enclosed within on the conical little shaft part 22, can not come off, and is convenient to install.On little shaft part 22, also offer spring seat oilhole 23.
In the utility model when assembling,, plunger bushing 5 is screwed into outlet valve 10 from the pump housing 1 top end face is lower than the end face of the pump housing 1, rail body 15 is screwed the end face at the pump housing 1 again, and this moment, outlet valve 10 did not contact with rail body 15.Then, from the hole of the pump housing 1 bottom, plunger bushing 5 is upwards twisted, the bottom surface that makes the end face of outlet valve 10 withstand rail body 15, like this, between the bottom of the valve pocket of plunger bushing 5 bottom and oiling valve 6, between the bottom of the top of oiling valve 6 and outlet valve 10, three high pressure sealing face B forming between the bottom of the top of outlet valve 10 and rail body 15 all produce higher contact pressure, the fuel pressure that produces when being enough to seal operation.
During the utility model work, camshaft 2 rotations drive tappet 3 and plunger 4 and move up and down, and alternately produce malleation and negative pressure in plunger cavity 17, repeatedly oil suction and pressure oil.
Oil-absorbing process: plunger 4 is descending, and plunger cavity 17 produces negative pressure, and fuel oil is pushed oiling valve steel ball 7 open and entered out oil pocket 16, and this moment, high pressure oil made outlet valve steel ball 11 be in the hermetically closing state because the outlet valve steel ball communicates with the interior high pressure volume of rail body 15 11 or more; Plunger 4 moves to after bottom dead center and moves upward, and plunger cavity 17 produces malleation, oiling valve steel ball 7 is taken a seat close oil-feed, and oil-feed finishes.
Press oily process: plunger 4 continues up, and plunger cavity 17 pressure rise to above the high pressure in the rail body 15, push outlet valve steel ball 11 open, and high pressure fuel enters rail body 15.Plunger 4 arrival atdc begin descending, and plunger cavity 17 pressure descend, and outlet valve steel ball 11 cuts out under the effect of rail body 15 inner high voltage fuel oils, presses oil to finish, and begins oil suction then again.
The utility model is arranged on outlet valve spool hold down gag (comprising oil outlet valve spring 12, oil outlet valve spring cover 13 and oil outlet valve spring seat 14) in the rail body 15, do not occupy height dimension, compare with existing common-rail high-pressure pump shown in Figure 1, the height of the oil pump H value (being the height of oil outlet valve spring cover 13) that descended, reduced with engine body interfere may; And the height of the pump housing 1 and the plunger bushing 5 H value that all descended has reduced the material and the processing cost of part; In addition, high pressure sealing face is kept to three by four, has improved sealing.
Claims (10)
1. the common-rail high-pressure pump of a pump rail one, roof anchorage at the pump housing (1) connects rail body (15), the top of the described pump housing (1) inner chamber is fixedly connected with plunger bushing (5), between the valve pocket of described plunger bushing (5) and the described rail body (15) oiling valve (6) is installed, outlet valve (10) and outlet valve spool hold down gag, be provided with oiling valve spool hold down gag in the inner chamber of described outlet valve (10), it is characterized in that: described oiling valve (6) and described outlet valve (10) are installed in the valve pocket of described plunger bushing (5) from bottom to top successively, the end face of described outlet valve (10) exceeds the end face of described plunger bushing (5) and contacts with the bottom surface of described rail body (15), and described outlet valve spool hold down gag is arranged in the described rail body (15).
2. according to the common-rail high-pressure pump of the described pump rail of claim 1 one, it is characterized in that: be provided with the spring housing mounting hole (19) that is communicated with rail body cavity (18) quadrature in the described rail body (15), described outlet valve spool hold down gag is installed in described spring housing mounting hole (19) and the described rail body cavity (18).
3. according to the common-rail high-pressure pump of the described pump rail of claim 2 one, it is characterized in that: described outlet valve spool hold down gag comprises oil outlet valve spring cover (13), oil outlet valve spring seat (14) and oil outlet valve spring (12); Described oil outlet valve spring cover (13) is a cylindrical shape, be inserted in the described spring housing mounting hole (19), the upper bottom surface of described oil outlet valve spring cover (13) has the spring seat mounting hole (24) that is connected with spring housing inner chamber (26), has the spring housing oilhole (25) that is connected with described spring housing inner chamber (26) on its wall; Described oil outlet valve spring seat (14) is a multidiameter shaft shape, comprise the spindle nose (20) that links to each other successively, big shaft part (21) and little shaft part (22), the outer end of described spindle nose (20) is resisted against on the inwall of described rail body cavity (18), described big shaft part (21) is engaged in the described spring seat mounting hole (24), described little shaft part (22) is outer to be set with oil outlet valve spring (12), and the end of described oil outlet valve spring (12) is resisted against on the outlet valve spool.
4. according to the common-rail high-pressure pump of the described pump rail of claim 3 one, it is characterized in that: the outer end of described spindle nose (20) is spherical.
5. according to the common-rail high-pressure pump of the described pump rail of claim 3 one, it is characterized in that: the taper shape that described little shaft part (22) is little for the outer end, inner big.
6. according to the common-rail high-pressure pump of the described pump rail of claim 3 one, it is characterized in that: offer spring seat oilhole (23) on the described little shaft part (22).
7. according to the common-rail high-pressure pump of the described pump rail of claim 3 one, it is characterized in that: described outlet valve spool is outlet valve steel ball (11).
8. according to the common-rail high-pressure pump of the described pump rail of claim 1 one, it is characterized in that: described oiling valve spool hold down gag comprises oiling valve spring (8) and oiling valve spring seat (9), described oiling valve spring seat (9) is installed in the inner chamber of described outlet valve (10), described oiling valve spring (8) is sleeved on outside the described oiling valve spring seat (9), and the end of described oiling valve spring (8) is resisted against on the oiling valve spool.
9. according to the common-rail high-pressure pump of the described pump rail of claim 8 one, it is characterized in that: described oiling valve spool is oiling valve steel ball (7).
10. according to the common-rail high-pressure pump of the described pump rail of claim 1 one, it is characterized in that: be threaded between the top of the top of described plunger bushing (5) and the described pump housing (1) inner chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120052744XU CN202012427U (en) | 2011-03-02 | 2011-03-02 | Common-rail high-pressure pump with integrated pump and rail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120052744XU CN202012427U (en) | 2011-03-02 | 2011-03-02 | Common-rail high-pressure pump with integrated pump and rail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202012427U true CN202012427U (en) | 2011-10-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120052744XU Expired - Lifetime CN202012427U (en) | 2011-03-02 | 2011-03-02 | Common-rail high-pressure pump with integrated pump and rail |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202012427U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103061936A (en) * | 2013-01-10 | 2013-04-24 | 无锡开普机械有限公司 | Oil inlet and outlet valve of common-rail pump |
| CN105863914A (en) * | 2016-06-18 | 2016-08-17 | 常州博瑞油泵油嘴有限公司 | Single-cylinder common rail energy accumulator |
| CN105888905A (en) * | 2016-06-18 | 2016-08-24 | 常州博瑞油泵油嘴有限公司 | Combined type high-pressure common-rail pump for single-cylinder diesel engine and assembling method of pump |
| CN105952561A (en) * | 2016-06-18 | 2016-09-21 | 常州博瑞油泵油嘴有限公司 | Common rail pump component of high-pressure common rail pump of single-cylinder diesel |
| CN105952562A (en) * | 2016-06-18 | 2016-09-21 | 常州博瑞油泵油嘴有限公司 | Composite high-pressure common rail pump for single cylinder diesel engine |
| CN106640456A (en) * | 2016-12-27 | 2017-05-10 | 清华大学 | Pump rail body for fuel injection system of internal combustion engine |
| CN106762295A (en) * | 2016-12-27 | 2017-05-31 | 清华大学 | For the monomer high-pressure pump rail assembly of internal combustion engine |
| CN106762296A (en) * | 2016-12-27 | 2017-05-31 | 清华大学 | For the synthesis type high-pressure pump rail assembly of multi-cylinder engine |
| CN114278475A (en) * | 2022-01-07 | 2022-04-05 | 龙口龙泵柴油喷射高科有限公司 | Pump-rail integrated electric control common rail high-pressure oil supply system assembly |
-
2011
- 2011-03-02 CN CN201120052744XU patent/CN202012427U/en not_active Expired - Lifetime
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014107825A1 (en) * | 2013-01-10 | 2014-07-17 | 无锡开普机械有限公司 | Inlet/outlet fuel valves of common rail pump |
| CN103061936B (en) * | 2013-01-10 | 2015-08-19 | 无锡开普机械有限公司 | The turnover fuel tap of common rail pump |
| CN103061936A (en) * | 2013-01-10 | 2013-04-24 | 无锡开普机械有限公司 | Oil inlet and outlet valve of common-rail pump |
| CN105952562B (en) * | 2016-06-18 | 2023-11-14 | 常州博瑞油泵油嘴有限公司 | Combined type high-pressure common rail pump for single-cylinder diesel engine |
| CN105863914A (en) * | 2016-06-18 | 2016-08-17 | 常州博瑞油泵油嘴有限公司 | Single-cylinder common rail energy accumulator |
| CN105888905A (en) * | 2016-06-18 | 2016-08-24 | 常州博瑞油泵油嘴有限公司 | Combined type high-pressure common-rail pump for single-cylinder diesel engine and assembling method of pump |
| CN105952561A (en) * | 2016-06-18 | 2016-09-21 | 常州博瑞油泵油嘴有限公司 | Common rail pump component of high-pressure common rail pump of single-cylinder diesel |
| CN105952562A (en) * | 2016-06-18 | 2016-09-21 | 常州博瑞油泵油嘴有限公司 | Composite high-pressure common rail pump for single cylinder diesel engine |
| CN105952561B (en) * | 2016-06-18 | 2023-11-14 | 常州博瑞油泵油嘴有限公司 | Common rail pump component of high-pressure common rail pump of single-cylinder diesel engine |
| CN106762295A (en) * | 2016-12-27 | 2017-05-31 | 清华大学 | For the monomer high-pressure pump rail assembly of internal combustion engine |
| CN106762295B (en) * | 2016-12-27 | 2018-02-16 | 清华大学 | Monomer high-pressure pump rail assembly for internal combustion engine |
| CN106762296B (en) * | 2016-12-27 | 2018-04-20 | 清华大学 | Synthesis type high-pressure pump rail assembly for multi-cylinder engine |
| CN106640456B (en) * | 2016-12-27 | 2018-05-29 | 清华大学 | For the pump rail body of internal combustion engine fuel injection system |
| CN106762296A (en) * | 2016-12-27 | 2017-05-31 | 清华大学 | For the synthesis type high-pressure pump rail assembly of multi-cylinder engine |
| CN106640456A (en) * | 2016-12-27 | 2017-05-10 | 清华大学 | Pump rail body for fuel injection system of internal combustion engine |
| CN114278475A (en) * | 2022-01-07 | 2022-04-05 | 龙口龙泵柴油喷射高科有限公司 | Pump-rail integrated electric control common rail high-pressure oil supply system assembly |
| CN114278475B (en) * | 2022-01-07 | 2023-12-01 | 龙口龙泵柴油喷射高科有限公司 | Pump rail integrated electric control common rail high-pressure oil supply system assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111019 |