CN214221382U - Single-cylinder common-rail oil supply pump of blade-mounted oil transfer pump - Google Patents
Single-cylinder common-rail oil supply pump of blade-mounted oil transfer pump Download PDFInfo
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- CN214221382U CN214221382U CN202023129673.7U CN202023129673U CN214221382U CN 214221382 U CN214221382 U CN 214221382U CN 202023129673 U CN202023129673 U CN 202023129673U CN 214221382 U CN214221382 U CN 214221382U
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Abstract
The utility model discloses a dress blade formula fuel delivery pump's single cylinder common rail fuel feed pump, include: the common rail fuel feed pump comprises a common rail fuel feed pump body connected with an engine, wherein a blade type fuel feed pump mounting cavity, a fuel metering valve mounting cavity, a pressure release valve mounting cavity, a fuel pumping part mounting cavity, a fuel inlet joint mounting cavity, a fuel outlet joint mounting cavity, a fuel return connecting oil duct, a roller body part mounting cavity, a camshaft part mounting cavity, a fuel inlet joint arranged in the fuel inlet joint mounting cavity and a fuel outlet joint arranged in the fuel outlet joint mounting cavity are arranged in the common rail fuel feed pump body; the lowest of its oil feed joint with the oil return joint is higher than the highest of pump oil part installation cavity and makes the unable plunger upper portion that gets into of air, just can not have the air admission when the motion of pump oil part, has avoided leading to starting difficulty or unable start-up after advancing the air because of the low pressure oil circuit.
Description
Technical Field
The utility model relates to a fuel feed pump technical field, in particular to dress single cylinder common rail fuel feed pump of blade type fuel delivery pump.
Background
With the increasing importance of society on environmental protection, the national emission requirements on non-road engines are higher and higher, and under the emission requirements of T4 and T4, the improved fuel injection system can effectively improve the combustion condition of the engine and reduce the emission of the engine, so that the application of the high-pressure common rail technology on the non-road engines is wider and wider, but faults such as the abrasion of a cam shaft and a roller body caused by the blockage of an oil injector, the difficulty in standing and starting, the poor cleanliness of a lubricating cavity of a fuel feed pump and the like occur more and more frequently, especially faults above a single-cylinder common rail fuel feed pump of a vane type fuel feed pump occur frequently, and the solution of the faults becomes urgent.
The diesel oil feeding mode of the single-cylinder common-rail oil supply pump of the blade-mounted oil supply pump which is mainstream in the market at present provides a direct diesel oil feeding metering valve for the oil supply pump, the direct diesel oil feeding metering valve is directly provided for the oil supply pump, and the oil feeding metering valve is not connected with a diesel oil fine filter, so that the cleanliness of the diesel oil entering a high-pressure cavity of the oil supply pump is lower than that of the diesel oil entering the high-pressure cavity after the diesel oil fine filter, and the fault of an oil sprayer is easy to occur; and because the oil inlet metering valve and the pressure stabilizing valve can not be completely sealed, the oil inlet metering valve and the pressure stabilizing valve are communicated with the oil delivery pump through the oil duct, after the engine stops, the diesel oil in the high-pressure cavity of the oil supply pump slowly leaks back to the oil tank through the oil duct communicated with the oil delivery pump, after the engine stops for a period of time, the diesel oil level in the high-pressure cavity of the oil supply pump is reduced, air enters, and when the engine starts, a plunger in the oil supply pump does not spray high-pressure oil, so that the engine can not normally start, namely the engine is difficult to start in a standing way.
In addition, the lubricating cavity structure of the single-cylinder common rail oil supply pump of the currently mainstream blade-mounted oil supply pump on the market is that a camshaft cavity in the lubricating cavity is of a closed structure and is free of a cleaning hole, an air balance hole above the roller body is a cross hole and penetrates through the camshaft cavity, and the outside of the air balance hole is blocked by a plug or a steel ball. The disadvantages are: the air balance hole is communicated through the crossed hole, burrs are difficult to remove, and finally enter the camshaft cavity, aluminum scraps generated in the initial motion of the common rail oil supply pump can also enter the camshaft cavity after the common rail oil supply pump is debugged, the imperforate portion of the camshaft cavity can be filled with cleaning liquid for cleaning, the burrs and the aluminum scraps cannot be cleaned, the cleanliness of the lubrication cavity is poor, and the camshaft and the roller body are abraded.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that the poor problem of high-pressure diesel oil cleanliness of the existing common rail oil feed pump can lead to the problem of difficult or unable start-up and the poor problem of the cleanliness of the lubricating cavity of the oil feed pump after entering the air with the low-pressure oil circuit, and the single cylinder common rail oil feed pump of the vane-mounted oil feed pump is provided.
In order to realize the purpose of the utility model, the technical proposal adopted by the utility model is as follows
A single cylinder common rail fuel feed pump for a vaned fuel feed pump, comprising:
the common rail fuel feed pump comprises a common rail fuel feed pump body connected with an engine, wherein a vane type fuel feed pump installation cavity, a fuel metering valve installation cavity, a pressure release valve installation cavity, a fuel pumping part installation cavity, a fuel inlet joint installation cavity, a fuel outlet joint installation cavity, a fuel return connection oil duct, a roller body part installation cavity and a cam shaft part installation cavity are arranged in the common rail fuel feed pump body, the vane type fuel feed pump installation cavity is communicated with the fuel outlet joint installation cavity, the fuel inlet joint installation cavity is communicated with the fuel metering valve installation cavity, the fuel metering valve installation cavity is communicated with the pressure release valve installation cavity, the fuel metering valve installation cavity is communicated with the fuel pumping part installation cavity, the fuel return joint installation cavity is communicated with the pressure release valve installation cavity, the fuel return connection oil duct is communicated with the fuel return joint installation cavity, the vane type fuel feed pump installation cavity, the fuel return joint installation cavity, the pressure release valve installation cavity, the fuel return connection oil duct and the cam shaft installation cavity, The oil outlet joint mounting cavity, the oil return joint mounting cavity and the oil return connecting oil duct are communicated to form a low-pressure oil path, and the roller body part mounting cavity is communicated with the camshaft part mounting cavity to form a lubricating cavity;
the oil inlet joint is arranged in the oil inlet joint installation cavity through a threaded sleeve and a sealing piece;
the oil outlet joint is arranged in the oil outlet joint installation cavity through a threaded sleeve and a sealing element;
the pressure relief valve is arranged in the pressure relief valve installation cavity through a threaded sleeve and a sealing element; the oil pump is characterized in that the lowest part of the oil inlet joint and the lowest part of the oil return joint are higher than the highest part of the oil pumping component mounting cavity.
In a preferred embodiment of the present invention, the oil outlet joint is connected to a diesel filter on the engine through a low pressure oil pipe, and the diesel filter is connected to the oil inlet joint through a low pressure oil pipe. The diesel oil enters the diesel oil filter for fine filtration after passing through the oil outlet connector and then enters the fuel oil metering valve installation cavity through the oil inlet connector, and one-step filtration is added.
In a preferred embodiment of the present invention, in order to prevent the air compression during the up-and-down movement of the roller body component from generating high pressure to affect the movement or causing the diesel oil to leak and the engine oil to be unable to be discharged into the diesel oil in time, a first air passing channel and a second air passing channel are provided in the roller body component mounting cavity, the first air passing channel communicates the roller body component mounting cavity with the camshaft component mounting cavity, and the upper portion of the second air passing channel is sealed with the steel ball.
In a preferred embodiment of the present invention, the first air passing channel and the second air passing channel are connected in a T shape and directly cast and formed, so as to reduce the production of burrs during processing and assembly.
In the utility model discloses a preferred embodiment, be provided with the washing hole on the camshaft components installation cavity, through increasing the washing hole on the camshaft components installation cavity, increased the lubricated chamber and can wash the function.
Since the technical scheme as above is used, the utility model discloses can prevent to advance the air back from low pressure oil circuit, the air can not enter into high pressure fuel pipe along the low pressure chamber in, can effectively avoid the diesel engine to start the difficulty or can't start, diesel oil increases the essence and strains, has improved the cleanliness that gets into the diesel oil in the pump oil part, and lubricated chamber changes the oil duct design and increases the washing, has improved the cleanliness in lubricated chamber.
Drawings
Fig. 1 is a front view of the single-cylinder common-rail fuel feed pump of the vane-mounted fuel feed pump of the present invention.
Fig. 2 is a right side view of fig. 1.
Fig. 3 is a schematic cross-sectional view of the low-pressure oil path of the single-cylinder common-rail oil supply pump of the vane-mounted oil supply pump of the present invention.
Fig. 4 is a schematic diagram of the oil supply of the vane type oil pump of the single-cylinder common-rail oil supply pump of the vane type oil pump of the present invention.
FIG. 5 is a schematic view of the lubricating oil path of the single-cylinder common-rail oil supply pump of the vane-mounted oil pump of the present invention
FIG. 6 is a schematic diagram of a cleaning liquid inlet of a lubricating cavity of a single-cylinder common-rail oil supply pump of the vane-mounted oil pump of the present invention
Detailed Description
In order to make the present invention easy to understand, the present invention will be further explained with reference to the specific drawings.
Referring to fig. 1 to 6, the single-cylinder common rail fuel feed pump provided with the vane type fuel delivery pump comprises a common rail fuel feed pump body 100 connected with an engine, wherein a fuel delivery pump installation cavity 610 is arranged in the common rail fuel feed pump body 100, diesel enters an oil passage 620 through a vane type fuel delivery pump 600 assembled in the vane type fuel delivery pump installation cavity 610 and then enters an oil passage 220, a threaded sleeve 200 is installed in an oil outlet joint installation cavity 210 and is connected with a low-pressure oil pipe on the engine through an oil outlet bolt 230 and a sealing gasket 240, and the diesel enters a diesel filter installed on the engine through the low-pressure oil pipe, so that the diesel is filtered, and the cleanliness of the diesel for injection is improved.
The diesel filter is connected with an oil inlet joint 430 and a sealing washer 420 through a low-pressure oil pipe and assembled on a threaded sleeve 410, the threaded sleeve 410 is installed in an oil inlet joint installation cavity 400, diesel enters the oil inlet joint installation cavity 400, the oil inlet joint installation cavity 400 is communicated with a fuel metering valve installation cavity 630 and a pressure relief valve installation cavity 350, the pressure relief valve installation cavity 350 is communicated with an oil pumping part installation cavity 800, when the fuel metering valve 120 is opened, the diesel enters the oil pumping part installation cavity 800, a plunger 820 in the oil pumping part 130 is driven to move through a cam shaft part 900, and the diesel is sprayed out of the oil pumping part 130 and enters a common rail pipe through a high-pressure oil pipe.
When the fuel metering valve 120 is closed and the pressure of diesel oil in the oil pumping part installation cavity 800 is greater than the opening pressure of the pressure relief valve 330, the diesel oil flows out from the pressure relief valve 330, the pressure relief valve 330 has a step opening pressure, meanwhile, the leakage when the pressure relief is not opened is prevented by the sealing ring 320, the leakage of the diesel oil is prevented by the sealing ring 340, when the step one is opened, the diesel oil directly enters the oil return joint installation cavity 500 through the pressure relief valve 330, when the pressure relief valve 330 is opened at the step two, the diesel oil when the step two is opened enters the oil return connecting oil passage 310, the body of the pressure relief valve 330 is sealed by the screw plug 300 to prevent the leakage of the diesel oil, the diesel oil enters the oil return joint installation cavity 500 through the oil return joint 540, the screw sleeve 510 is installed in the oil return joint installation cavity 500, the low-pressure oil pipe of the diesel engine is connected with the sealing washer 520 through the bolt 530 and installed on the screw sleeve 510, the diesel oil enters the low-pressure oil pipe of the engine from the oil return joint installation cavity 500 and flows back to the oil tank, the lowest positions of the oil inlet joint 430 and the oil return joint 540 on the pump body 100 are higher than the highest position of the oil pumping part mounting cavity 800, air cannot enter the upper part 810 of the plunger 820, air cannot enter when the oil pumping part 130 moves, and starting difficulty or starting incapability caused by air entering from a low-pressure oil path is avoided.
The common rail fuel feed pump body 100 is internally provided with a roller body part installation cavity 100a, when the cam shaft part 900 drives the roller body part 700 to move up and down, in order to prevent air compression in the up and down movement process of the roller body part 700 from generating high pressure to affect movement or cause diesel oil leakage and engine oil from being discharged into the diesel oil in time, a first air passing channel 720 and a second air passing channel 730 are designed in the roller body part installation cavity 100a, the roller body part installation cavity 100a is communicated with the cam shaft part installation cavity 910 through the first air passing channel 720, the upper part of the second air passing channel 730 is sealed by a steel ball 740, the first air passing channel 720 and the second air passing channel 730 are connected in a T shape and are directly cast and formed, and burrs generated by processing and assembling are reduced.
The cleaning holes 760 are added on the camshaft part mounting cavity 910 at the same time, after the camshaft part mounting cavity is completely assembled and debugged, cleaning liquid is introduced from the cleaning holes 760 for cleaning, the cleaning liquid flows according to the figure 6, finally flows out from the bearing cover hole 750, impurities in the lubricating cavity are taken out, the cleanliness of the lubricating cavity is improved, and the cleaning holes 760 are sealed by the screw plugs 110 after cleaning is completed.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only illustrative of the structural principle of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the present invention, and these changes and modifications fall within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. A single cylinder common rail fuel feed pump for a vaned fuel feed pump, comprising:
the common rail fuel feed pump comprises a common rail fuel feed pump body connected with an engine, wherein a vane type fuel feed pump installation cavity, a fuel metering valve installation cavity, a pressure release valve installation cavity, a fuel pumping part installation cavity, a fuel inlet joint installation cavity, a fuel outlet joint installation cavity, a fuel return connection oil duct, a roller body part installation cavity and a cam shaft part installation cavity are arranged in the common rail fuel feed pump body, the vane type fuel feed pump installation cavity is communicated with the fuel outlet joint installation cavity, the fuel inlet joint installation cavity is communicated with the fuel metering valve installation cavity, the fuel metering valve installation cavity is communicated with the pressure release valve installation cavity, the fuel metering valve installation cavity is communicated with the fuel pumping part installation cavity, the fuel return joint installation cavity is communicated with the pressure release valve installation cavity, the fuel return connection oil duct is communicated with the fuel return joint installation cavity, the vane type fuel feed pump installation cavity, the fuel return joint installation cavity, the pressure release valve installation cavity, the fuel return connection oil duct and the cam shaft installation cavity, The oil outlet joint mounting cavity, the oil return joint mounting cavity and the oil return connecting oil duct are communicated to form a low-pressure oil path, and the roller body part mounting cavity is communicated with the camshaft part mounting cavity to form a lubricating cavity;
the oil inlet joint is arranged in the oil inlet joint installation cavity through a threaded sleeve and a sealing piece;
the oil outlet joint is arranged in the oil outlet joint installation cavity through a threaded sleeve and a sealing element;
the pressure relief valve is arranged in the pressure relief valve installation cavity through a threaded sleeve and a sealing element; the oil pump is characterized in that the lowest part of the oil inlet joint and the lowest part of the oil return joint are higher than the highest part of the oil pumping component mounting cavity.
2. The single cylinder common rail fuel feed pump of a vaned fuel feed pump of claim 1, wherein the fuel outlet connection is connected to a diesel filter on the engine through a low pressure fuel line, the diesel filter being connected to the fuel inlet connection through a low pressure fuel line; the diesel oil enters the diesel oil filter for fine filtration after passing through the oil outlet connector and then enters the fuel oil metering valve installation cavity through the oil inlet connector.
3. The single cylinder common rail fuel feed pump of claim 1, wherein a first air passage and a second air passage are provided in said roller body member mounting cavity, said first air passage communicating said roller body member mounting cavity with said camshaft member mounting cavity, and an upper portion of said second air passage being sealed with a steel ball.
4. The single cylinder common rail fuel feed pump of claim 3, wherein said first fuel passage and said second fuel passage are connected in a T-shape and are directly cast.
5. The single cylinder common rail fuel feed pump of claim 3, wherein a purge hole is provided in said camshaft member mounting cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023129673.7U CN214221382U (en) | 2020-12-23 | 2020-12-23 | Single-cylinder common-rail oil supply pump of blade-mounted oil transfer pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023129673.7U CN214221382U (en) | 2020-12-23 | 2020-12-23 | Single-cylinder common-rail oil supply pump of blade-mounted oil transfer pump |
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| Publication Number | Publication Date |
|---|---|
| CN214221382U true CN214221382U (en) | 2021-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023129673.7U Active CN214221382U (en) | 2020-12-23 | 2020-12-23 | Single-cylinder common-rail oil supply pump of blade-mounted oil transfer pump |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112648120A (en) * | 2020-12-23 | 2021-04-13 | 南岳电控（衡阳）工业技术股份有限公司 | Single-cylinder common-rail oil supply pump of blade-mounted oil transfer pump |
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2020
- 2020-12-23 CN CN202023129673.7U patent/CN214221382U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112648120A (en) * | 2020-12-23 | 2021-04-13 | 南岳电控（衡阳）工业技术股份有限公司 | Single-cylinder common-rail oil supply pump of blade-mounted oil transfer pump |
| CN112648120B (en) * | 2020-12-23 | 2024-06-21 | 南岳电控（衡阳）工业技术股份有限公司 | Single-cylinder common rail oil supply pump of vane-type oil delivery pump |
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