CN211819753U - In-line large multi-cylinder diesel engine diesel oil supply system for reducing pressure fluctuation - Google Patents
In-line large multi-cylinder diesel engine diesel oil supply system for reducing pressure fluctuation Download PDFInfo
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- CN211819753U CN211819753U CN202020443816.2U CN202020443816U CN211819753U CN 211819753 U CN211819753 U CN 211819753U CN 202020443816 U CN202020443816 U CN 202020443816U CN 211819753 U CN211819753 U CN 211819753U
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Abstract
The utility model discloses a reduce large-scale multi-cylinder diesel engine diesel oil feed system of in-line of pressure fluctuation belongs to diesel engine fuel oil feeding device field, solves the big problem of traditional diesel engine diesel oil feed system oil pressure fluctuation. The supply system comprises a high-pressure oil supply pump, oil rail pipes, high-pressure oil pipes and oil injectors, wherein the oil injectors are communicated with the high-pressure oil pipes in a one-to-one correspondence mode, the oil injectors are divided into at least two groups, two adjacent high-pressure oil pipes corresponding to each other in each oil injector are communicated with each other, one high-pressure oil pipe corresponding to each oil injector in each group is communicated with the high-pressure oil supply pump through one oil rail pipe, and the length of the high-pressure oil pipe corresponding to each oil injector in each group is gradually shortened along the far end of the oil rail pipe corresponding to the oil injector. The utility model discloses a large-scale multi-cylinder diesel engine diesel oil feed system of in-line can reduce high-pressure diesel oil arrival time, and it is undulant to reduce the oil pressure, improves engine wholeness ability.
Description
Technical Field
The utility model relates to a diesel engine fuel feeding device field, more specifically says that it relates to a large-scale multi-cylinder diesel engine diesel oil feed system of in-line that reduces pressure oscillation.
Background
In the face of the urgent requirement of energy conservation and emission reduction worldwide, the diesel engine must further improve the combustion process, and the performance of a fuel injection system is a key factor for determining the combustion process. Compared with a traditional mechanical pump and an electric control monoblock pump, the high-pressure common-rail fuel injection technology has higher injection pressure, the injection pressure can be flexibly adjusted according to working conditions, the oil injection timing and the oil injection quantity can be accurately controlled, and multiple injections can be realized. Therefore, the electrically controlled high-pressure common rail is a necessary trend for the development of the fuel injection technology of the diesel engine.
As shown in fig. 1, the existing in-line large multi-cylinder diesel engine diesel oil supply system includes a high-pressure oil supply pump 6, an oil rail pipe 7, a high-pressure oil pipe 9 and an oil injector 13, wherein after passing through the high-pressure oil supply pump 6, the diesel oil is pressurized, reaches the high-pressure oil pipe 9 corresponding to the oil injector 13 of each cylinder through the oil rail pipe 7, and then reaches the oil injector 13 of each cylinder through the high-pressure oil pipe 9 to perform oil injection operation.
The existing diesel oil supply system of the in-line large multi-cylinder diesel engine has the problems that after the diesel oil supply system comes out through an oil rail pipe, all cylinders are supplied with oil, when the number of cylinders of the engine exceeds 4 cylinders, such as 6 cylinders, 8 cylinders and 9 cylinders, and is more than the number of cylinders, the pressure of an oil injector at the far end of the oil supply is attenuated relatively quickly, so that the pressure fluctuation of the far-end oil injector is large, and the direct result is that the exhaust temperature of each cylinder is not uniform, namely, the combustion of each cylinder has great difference, so that the overall performance of the engine is poor, and the power output requirement cannot be well met.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is not enough to the above-mentioned of prior art, provide a large-scale multi-cylinder diesel engine diesel oil feed system of in-line that reduces the pressure oscillation, can reduce high-pressure diesel oil arrival time, reduce the oil pressure fluctuation, improve engine wholeness ability.
The technical scheme of the utility model is like this: the diesel oil supply system comprises a high-pressure oil supply pump, oil rail pipes, high-pressure oil pipes and oil injectors, wherein the oil injectors are communicated with the high-pressure oil pipes in a one-to-one correspondence mode, the oil injectors are divided into at least two groups, every group of the oil injectors is formed by communicating two adjacent high-pressure oil pipes corresponding to each other, every group of the oil injectors is formed by communicating one high-pressure oil pipe corresponding to each oil injector with the high-pressure oil supply pump through one oil rail pipe, and the length of the high-pressure oil pipe corresponding to each oil injector is gradually shortened along the far end of the oil rail pipe corresponding to the oil injector.
As a further improvement, the oil-feeding device further comprises an oil feeding pipe, a filter and an oil discharging pipe which are sequentially communicated, the oil feeding pipe is communicated with an oil tank, and the oil discharging pipe is communicated with a high-pressure oil supply pump.
Furthermore, a prefilter and an oil transfer pump are respectively arranged between the oil inlet pipe and the oil tank, the prefilter is communicated with the oil transfer pump through an oil conveying pipe, and the oil transfer pump is communicated with the oil inlet pipe.
Further, the oil delivery pump is integrally installed at the rear part of the high-pressure oil supply pump.
The engine further comprises an oil return manifold and an oil return pipe which are communicated, wherein the oil return manifold is communicated with each cylinder of the engine, and the oil return pipe is communicated with an oil tank.
Furthermore, a plurality of high-pressure oil pipes close to the oil rail pipes in each group of the oil injectors are communicated with one transition joint, the farthest high-pressure oil pipe in each group of the oil injectors is communicated with the transition joint corresponding to the adjacent oil injector in the group, the closest transition joint in each group of the oil injectors is communicated with the oil rail pipe, and the two corresponding adjacent transition joints in each group of the oil injectors are communicated through a high-pressure connecting pipe (10).
Furthermore, a pressure accumulation cavity is arranged in the high-pressure oil supply pump, and each oil rail pipe is communicated with the pressure accumulation cavity.
Advantageous effects
Compared with the prior art, the utility model, have following advantage:
1. the utility model discloses a large-scale multi-cylinder diesel engine diesel oil feed system of in-line divide into the multiunit through the sprayer that corresponds the large-scale multi-cylinder diesel engine of in-line to every sprayer is respectively through an oil rail pipe and high pressure fuel feed pump intercommunication fuel feeding, can reduce the time that the sprayer high pressure diesel oil of the more far away one end of relative oil rail pipe reachs, reduces the oil pressure fluctuation, improves engine wholeness ability.
2. The utility model discloses a set up the length of the high pressure fuel pipe that every group sprayer corresponds into the mode that shortens gradually along the one end far away for the oil rail pipe that this group sprayer corresponds, can further reduce the sprayer high pressure diesel oil arrival time of the one end far away of relative oil rail pipe in the sprayer in every group, further reduce the oil pressure fluctuation, keep the stability of every group sprayer oil pressure.
Drawings
FIG. 1 is a schematic diagram of a prior art structure;
fig. 2 is a schematic structural diagram of the present invention.
Wherein: 1-prefilter, 2-oil delivery pipe, 3-oil inlet pipe, 4-filter, 5-oil outlet pipe, 6-high pressure oil supply pump, 7-oil rail pipe, 8-transition joint, 9-high pressure oil pipe, 10-high pressure connecting pipe, 11-oil return manifold, 12-oil return pipe, 13-oil injector and 14-oil delivery pump.
Detailed Description
The invention will be further described with reference to specific embodiments shown in the drawings.
Referring to fig. 2, the utility model discloses a large-scale multi-cylinder diesel engine diesel oil feed system in-line of reducing pressure fluctuation, including high-pressure fuel feed pump 6, oil rail pipe 7, high pressure fuel pipe 9 and sprayer 13, wherein, the quantity of high pressure fuel pipe 9 and sprayer 13 all is the same with engine cylinder quantity, namely a cylinder corresponds a sprayer and high pressure fuel pipe, sprayer 13 and high pressure fuel pipe 9 one-to-one communicate, sprayer 13 divide into at least two sets, divide according to engine cylinder number, the sprayer of every group is 2-5, two adjacent high pressure fuel pipes 9 that correspond in every group sprayer 13 communicate each other, and one of them high pressure fuel pipe 9 that corresponds in every group sprayer 13 communicates with high pressure fuel feed pump 6 through an oil rail pipe 7, the quantity of oil rail pipe 7 is unanimous with the grouping quantity of sprayer 13, namely a group sprayer 13 corresponds an oil rail pipe 7, the length of the high-pressure oil pipe 9 corresponding to each group of injectors 13 is gradually shortened along the far end of the oil rail pipe 7 corresponding to the group of injectors 13, that is, in the same group of injectors 13, the length of the high-pressure oil pipe 9 closest to one end of the oil rail pipe 7 is longer, and then the lengths of the high-pressure oil pipes 9 far away from one end of the oil rail pipe 7 are gradually shortened.
When the diesel oil supply system of the in-line large multi-cylinder diesel engine works, after diesel oil passes through the high-pressure oil supply pump 6, the pressure of the diesel oil is increased, the diesel oil reaches the high-pressure oil pipe 9 corresponding to each group of oil injectors 13 through the oil rail pipe 7 respectively, and then the diesel oil reaches the oil injectors 13 corresponding to each cylinder through the high-pressure oil pipe 9, so that oil supply is carried out on each cylinder, the oil injectors corresponding to the in-line large multi-cylinder diesel engine are divided into multiple groups, and each group of oil injectors are communicated with the high-pressure oil supply pump through one oil rail pipe respectively for oil supply, so that the arrival time of the high-pressure diesel oil of the oil injector at the far end relative; and the length of the high-pressure oil pipe corresponding to each group of oil injectors is set to be gradually shortened along the far end of the oil rail pipe corresponding to the group of oil injectors, so that the high-pressure diesel arrival time of the oil injectors at the far end of the oil injectors corresponding to the oil rail pipe in each group of oil injectors can be further reduced, the oil pressure fluctuation is further reduced, and the stability of the oil pressure of each group of oil injectors is kept.
The diesel oil feed system of this embodiment still includes into oil pipe 3, filter 4 and play oil pipe 5 that communicate in proper order, and advances oil pipe 3 and oil tank intercommunication, goes out oil pipe 5 and high-pressure fuel feed pump 6 intercommunication, and diesel oil gets into filter 4 through advancing oil pipe 3 in the oil tank, and the diesel oil after filter 4 filters reachs high-pressure fuel feed pump 6 through going out oil pipe 5 again, realizes the oil circuit intercommunication.
Preferably, still be equipped with prefilter 1 and fuel delivery pump 14 respectively between advancing oil pipe 3 and oil tank, wherein, prefilter 1 and oil tank intercommunication, and prefilter 1 and fuel delivery pump 14 communicate through defeated oil pipe 2, and fuel delivery pump 14 and advance oil pipe 3 intercommunication, can ensure through the setting of delivery pump that diesel oil is carried to filter 4 to through the setting of prefilter 1, realize the purpose of prefilter diesel oil. Further, the oil transfer pump 14 is integrally installed at the rear part of the high-pressure oil supply pump 6, so that the occupied space of the oil transfer pump is reduced, and the structural arrangement is more compact.
The diesel oil supply system of the embodiment further comprises an oil return manifold 11 and an oil return pipe 12 which are communicated with each other, wherein the oil return manifold 11 is communicated with each cylinder of the engine, the oil return pipe 12 is communicated with an oil tank, and redundant diesel oil of each cylinder of the engine is collected to the oil return pipe 12 through the oil return manifold 11 and then returns to the oil tank, so that an oil circuit circulation loop is realized.
Preferably, a plurality of high-pressure oil pipes 9 close to the oil rail pipe 7 in each group of oil injectors 13 are all communicated with one transition joint 8, one high-pressure oil pipe 9 farthest to the oil rail pipe 7 in each group of oil injectors 13 is communicated with the transition joint 8 corresponding to the adjacent oil injector 13 in the group, the transition joint 8 closest to the oil rail pipe 7 in each group of oil injectors 13 is communicated with the oil rail pipe 7, two adjacent transition joints 8 corresponding to each group of oil injectors 13 are communicated through a high-pressure connecting pipe 10, referring to fig. 2, the diesel oil supply system of a six-cylinder engine is provided, six oil injectors 13 are averagely divided into two groups, three oil injectors 13 are arranged in sequence from left to right, the high-pressure oil pipes 9 corresponding to the first and second oil injectors 13 close to the oil rail pipe 7 are all connected with one transition joint 8, the transition joint 8 corresponding to the first oil injector 13 is connected with the oil rail pipe 7, the high-pressure oil pipe 9 corresponding to the third oil injector 13 is directly connected with the transition joint 8 corresponding to the adjacent second oil injector 13, so that the communication of an oil way can be ensured, the rail pressure can be kept consistent, and compared with a traditional diesel oil supply system, the number of the transition joints and the high-pressure connecting pipes is effectively reduced, the production cost is reduced, and the pipeline layout of the diesel oil supply system is optimized.
Preferably, a pressure accumulation cavity is arranged in the high-pressure oil supply pump 6, each oil rail pipe 7 is communicated with the pressure accumulation cavity, high-pressure oil is collected to the pressure accumulation cavity in a unified mode and flows out of the pressure accumulation cavity, pressure fluctuation of high-pressure diesel oil between plungers in the high-pressure oil supply pump 6 is avoided, and constant high-pressure oil outlet pressure is guaranteed.
The above is only the preferred embodiment of the present invention, and it should be noted that for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which will not affect the utility model and the utility of the patent.
Claims (7)
1. The utility model provides a large-scale multi-cylinder diesel engine diesel oil feed system in-line of reducing pressure fluctuation, includes high pressure fuel feed pump (6), oil rail pipe (7), high pressure fuel pipe (9) and sprayer (13), sprayer (13) communicate with high pressure fuel pipe (9) one-to-one, its characterized in that, sprayer (13) divide into at least two sets ofly, every group two adjacent high pressure fuel pipe (9) that correspond in sprayer (13) communicate each other, and every group one of them high pressure fuel pipe (9) that correspond in sprayer (13) communicate with high pressure fuel feed pump (6) through an oil rail pipe (7), every group the length of high pressure fuel pipe (9) that sprayer (13) correspond is along shortening gradually for the farther one end of the oil rail pipe (7) that this group sprayer (13) correspond.
2. The diesel oil supply system of the in-line large multi-cylinder diesel engine for reducing the pressure fluctuation as set forth in claim 1, further comprising an oil inlet pipe (3), a filter (4) and an oil outlet pipe (5) which are communicated in sequence, wherein the oil inlet pipe (3) is communicated with an oil tank, and the oil outlet pipe (5) is communicated with a high-pressure oil supply pump (6).
3. An in-line large multi-cylinder diesel engine diesel oil supply system for reducing pressure fluctuation according to claim 2, characterized in that a prefilter (1) and a fuel delivery pump (14) are respectively arranged between the oil inlet pipe (3) and the fuel tank, the prefilter (1) is communicated with the fuel delivery pump (14) through a fuel delivery pipe (2), and the fuel delivery pump (14) is communicated with the oil inlet pipe (3).
4. An in-line large multi-cylinder diesel engine diesel supply system for reducing pressure fluctuations as set forth in claim 3, characterized in that the fuel delivery pump (14) is integrally installed at the rear of the high pressure feed pump (6).
5. An in-line large multi-cylinder diesel engine diesel supply system for reducing pressure fluctuations as set forth in claim 1 further comprising an oil return manifold (11) and an oil return pipe (12) in communication, said oil return manifold (11) being in communication with each cylinder of the engine and said oil return pipe (12) being in communication with an oil tank.
6. The in-line large multi-cylinder diesel engine diesel supply system capable of reducing pressure fluctuation according to claim 1, wherein a plurality of high pressure fuel pipes (9) in each group of fuel injectors (13) which are close to the fuel rail pipes (7) are communicated with one transition joint (8), one high pressure fuel pipe (9) in each group of fuel injectors (13) which is farthest from the fuel rail pipes (7) is communicated with the transition joint (8) corresponding to the adjacent fuel injector (13) in the group, the transition joint (8) in each group of fuel injectors (13) which is closest to the fuel rail pipes (7) is communicated with the fuel rail pipes (7), and two corresponding adjacent transition joints (8) in each group of fuel injectors (13) are communicated with each other through the high pressure connecting pipe (10).
7. The diesel supply system of an in-line large multi-cylinder diesel engine for reducing pressure fluctuations of any one of claims 1 to 6, characterized in that a pressure accumulation chamber is provided in said high pressure feed pump (6), and each of said rail pipes (7) is communicated with said pressure accumulation chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020443816.2U CN211819753U (en) | 2020-03-31 | 2020-03-31 | In-line large multi-cylinder diesel engine diesel oil supply system for reducing pressure fluctuation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020443816.2U CN211819753U (en) | 2020-03-31 | 2020-03-31 | In-line large multi-cylinder diesel engine diesel oil supply system for reducing pressure fluctuation |
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| Publication Number | Publication Date |
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| CN211819753U true CN211819753U (en) | 2020-10-30 |
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| CN202020443816.2U Active CN211819753U (en) | 2020-03-31 | 2020-03-31 | In-line large multi-cylinder diesel engine diesel oil supply system for reducing pressure fluctuation |
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| TR01 | Transfer of patent right |
Effective date of registration: 20230113 Address after: No.88 Tianqiao West Road, Yulin City, Guangxi Zhuang Autonomous Region Patentee after: Guangxi Yuchai Ship Electric Power Co.,Ltd. Address before: No.88 Tianqiao West Road, Yulin City, Guangxi Zhuang Autonomous Region Patentee before: Guangxi Yuchai Machinery Co.,Ltd. |
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| TR01 | Transfer of patent right |