CN114278475B - Pump rail integrated electric control common rail high-pressure oil supply system assembly - Google Patents
Pump rail integrated electric control common rail high-pressure oil supply system assembly Download PDFInfo
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- CN114278475B CN114278475B CN202210017049.2A CN202210017049A CN114278475B CN 114278475 B CN114278475 B CN 114278475B CN 202210017049 A CN202210017049 A CN 202210017049A CN 114278475 B CN114278475 B CN 114278475B
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- 238000007789 sealing Methods 0.000 claims abstract description 64
- 238000005461 lubrication Methods 0.000 claims description 56
- 239000011148 porous material Substances 0.000 claims description 14
- 229910000906 Bronze Inorganic materials 0.000 claims description 6
- 229910052790 beryllium Inorganic materials 0.000 claims description 6
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 claims description 6
- 239000010974 bronze Substances 0.000 claims description 6
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims description 6
- 239000002283 diesel fuel Substances 0.000 abstract description 17
- 238000002347 injection Methods 0.000 abstract description 11
- 239000007924 injection Substances 0.000 abstract description 11
- 238000009434 installation Methods 0.000 abstract description 10
- 239000003921 oil Substances 0.000 description 183
- 238000010586 diagram Methods 0.000 description 8
- 238000003754 machining Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000010687 lubricating oil Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The invention discloses a pump rail integrated electric control common rail high-pressure oil supply system assembly, which comprises a high-pressure oil supply pump assembly, a common rail pipe assembly and a sealing mechanism thereof, wherein the common rail pipe assembly is arranged above the high-pressure oil supply pump assembly, the common rail pipe assembly comprises a rail body, a pressure limiting valve component and a rail pressure sensor, the high-pressure oil supply pump assembly adopts a multi-cylinder in-line layout, the high-pressure oil supply pump assembly comprises a pump body, a cam shaft, a roller body component and a pump oil system component, the pump oil system component is arranged in a pump oil system mounting hole at the upper part of the pump body, and the pump oil system component is connected with the pump body through a screw pair. According to the invention, through the integrated design of the high-pressure oil supply pump assembly and the common rail pipe assembly, the risk of oil leakage is reduced, and the design and installation of the high-pressure oil pipe of the diesel engine are simplified; the structure of the electric control common rail high-pressure oil supply system is simplified, the pressure loss and fluctuation of high-pressure diesel oil can be reduced, the oil injection control precision is improved, and meanwhile, the installation space of the electric control common rail oil injection system on a diesel engine is saved.
Description
Technical Field
The invention belongs to the technical field of high-pressure oil supply pump assemblies, and particularly relates to a pump rail integrated electric control common rail high-pressure oil supply system assembly.
Background
The diesel engine is widely applied to the fields of automobiles, engineering machinery, agricultural machinery, ships, power generation and the like. In order to reduce oil consumption, reduce emission and improve environment, more and more diesel engines begin to adopt an electric control high-pressure common rail oil injection system. The diesel engine electric control high pressure common rail oil injection system comprises a high pressure oil feed pump assembly, a common rail pipe assembly, a common rail oil injector assembly, an Electric Control Unit (ECU), a wire harness and the like, wherein in the prior art electric control high pressure common rail oil injection system, the high pressure oil feed pump assembly, the common rail oil injector assembly and the common rail pipe assembly are three independent components which are respectively arranged at different parts of an engine and are connected through high pressure oil pipes to form a complete diesel oil injection system. Because of the large number of parts and complex appearance of the diesel engine, the high-pressure oil pipe needs to be bent at a plurality of positions to meet the installation requirement; meanwhile, when the high-pressure diesel oil flows in the high-pressure oil pipe, the high-pressure diesel oil is influenced by bending and turning to generate pressure loss, and the pressure transmission of the diesel oil is influenced; on the other hand, the high-pressure oil pipe joint and the joint piece thereof cannot be connected accurately due to the influence of machining and installation dimensional accuracy, so that the high-pressure oil pipe joint is stressed unevenly when being screwed up, and the high-pressure oil pipe is not easy to screw up and even has the risk of oil leakage after being screwed up.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the electric control common rail high-pressure oil supply system assembly with the integrated pump rail, and the high-pressure oil supply pump assembly and the common rail pipe assembly are integrally designed, so that the risk of oil leakage is reduced, and the design and the installation of a high-pressure oil pipe of a diesel engine are simplified; the structure of the electric control common rail high-pressure oil supply system is simplified, the pressure loss and fluctuation of high-pressure diesel oil can be reduced, the oil injection control precision is improved, and meanwhile, the installation space of the electric control common rail oil injection system on a diesel engine is saved.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the utility model provides an integrative automatically controlled rail high pressure oil feeding system assembly of pump rail, includes high pressure oil feed pump assembly, common rail pipe assembly and sealing mechanism thereof, the common rail pipe assembly is installed in high pressure oil feed pump assembly top, high pressure oil feed pump assembly adopts multi-cylinder in-line overall arrangement, high pressure oil feed pump assembly includes the pump body, camshaft, gyro wheel body subassembly, pump oil system part installs in the pump oil system mounting hole on pump body upper portion, pump oil system part passes through screw thread pair with the pump body and is connected, gyro wheel body subassembly installs in pump oil system part below, the camshaft traverses at the camshaft intracavity of pump body lower part and with gyro wheel body subassembly butt, be equipped with the oil feed passageway on the pump body, the oil feed passageway runs through four cylinder body holes, still be equipped with total oil return hole on the pump body, total oil return hole tip is equipped with the oil return pipe bolt, the oil return pipe bolt is installed on the pump body, oil return pipe bolt one side of the pump body still installs the oil feed pump valve.
The common rail pipe assembly comprises a pressure limiting valve component, a rail body, a rail pressure sensor and an oil pipe joint, wherein the pressure limiting valve component is arranged at the left end of the rail body, the rail pressure sensor is arranged at the right end of the rail body, the oil pipe joint is arranged at two sides of the middle part of the rail body, two oil storage cavities which longitudinally penetrate through the whole rail body are arranged in the rail body, an oil inlet hole is formed in the lower part of the oil storage cavity corresponding to each cylinder body hole in the pump body, a leakage cavity oil return hole and a pressure limiting valve oil return hole are formed in the left end of the pump body, a throttling plug is arranged at the bottom of the pressure limiting valve oil return hole, the pressure limiting valve oil return hole is positioned in the middle of the left side of the upper end face of the pump body, the pressure limiting valve oil return hole is communicated with the leakage cavity oil return hole, a leakage cavity oil passing groove is formed between the lower part of the rail body and two adjacent cylinder holes, a high-pressure oil outlet hole is formed in the left side of the middle part of the rail body, and the high-pressure oil outlet hole is communicated with the oil storage cavity.
The sealing mechanism comprises a high-pressure sealing cover between the upper end face of the pump oil system component and the bottom face of the rail body, a special-shaped sealing ring and a good sealing ring between the pump body and the rail body, wherein the upper end face of the pump oil system component and the lower plane of the rail body connected with the upper end face of the pump oil system component are finish machining planes, the two finish machining planes are in hard contact to form a sealing ring belt by screwing the pump oil system component, the special-shaped sealing ring is arranged in a sealing groove on the upper end face of the pump body, the special-shaped sealing ring is in an end face sealing type, the special-shaped sealing ring is arranged between the pump body and the rail body, the pump body and the rail body are integrated into a whole through a tightly-attached high-pressure sealing plane, a high-pressure oil cavity formed among the pump body, the rail body and the sealing ring belt is formed by screwing the pump oil system component, the rail body, the sealing ring belt and a leakage cavity through an oil groove.
The roller body assembly comprises a roller body, a roller pin, a ball expansion type plug, a bushing and a roller, wherein the roller pin is arranged in a roller body hole and is fixed on the roller body through a cylindrical pin, a first lubrication duct a is symmetrically arranged on the roller body, a second lubrication duct b is symmetrically arranged on the roller pin, the bushing is pressed into the roller hole in an interference manner to form a roller assembly, the roller assembly is sleeved on the roller pin to form a kinematic pair of the roller and the roller pin, a third lubrication duct c and a fourth lubrication duct d are further arranged on the roller pin, the third lubrication duct c is vertically communicated with the fourth lubrication duct d, the second lubrication duct b is arranged on two sides of the roller pin and is communicated with the third lubrication duct c, and the ball expansion type plug is arranged at the opening end of the third lubrication duct c.
Preferably, the roller pin is provided with two symmetrical flat slots, and two oil storage tanks are formed on the working surface between the two flat slots and the inner hole of the bushing.
Preferably, the roller body is provided with long grooves, and the roller body is uniformly provided with a plurality of pore canals.
Preferably, the bushing is made of beryllium bronze.
The beneficial effects of the invention are as follows:
1) Through the integrated design of the high-pressure oil feed pump assembly and the common rail pipe assembly, the risk of oil leakage is reduced, and the design and the installation of the high-pressure oil pipe of the diesel engine are simplified; the structure of the electric control common rail high-pressure oil supply system is simplified, the pressure loss and fluctuation of high-pressure diesel oil can be reduced, the oil injection control precision is improved, and meanwhile, the installation space of the electric control common rail oil injection system on a diesel engine is saved.
2) The leakage cavity oil passing groove is formed in the bottom surface of the rail body, the leakage cavity oil passing groove is used for communicating the high-pressure leakage cavity of each cylinder of the oil supply pump, the processing is easy, the processing precision requirement is low, and trace diesel oil in the high-pressure leakage cavity of each cylinder hole finally directly enters an oil return channel of the common rail pump through a small oil return hole formed in the common rail pipe, so that the number of parts can be reduced, and meanwhile, the risk point of oil leakage is reduced.
3) The rail body is provided with two oil storage cavities, each cylinder of the rail body corresponding to the oil supply pump is provided with an oil inlet hole, and oil is respectively supplied to the two oil storage cavities through the high-pressure oil cavity, so that pressure balance in the two oil storage cavities can be realized; the double-channel oil storage cavity design can realize that more high-pressure diesel oil can be stored in the oil storage cavity with a smaller diameter, so that the size of the common rail pipe assembly is effectively reduced, and the material cost of the common rail pipe assembly is reduced.
4) The oil return holes of the pressure limiting valve are arranged on the rail body, meanwhile, the oil return holes of the through oil return pipe bolts are also formed in the corresponding positions on the pump body, so that the oil return after the pressure limiting valve is opened can be directly led to the oil return tank, a new oil return pipe is not required to be added, the oil pipe design of the diesel engine is simplified, and the cost of the engine can be effectively reduced.
5) The continuous forced lubrication with certain pressure is added on the basis of retaining splash lubrication of the roller body assembly, so that the roller body assembly can be subjected to more sufficient lubrication protection, bear larger load and higher rotating speed, improve the reliability of the oil supply pump of the common rail oil injection system under the working conditions of high load and high rotating speed, and effectively solve the problem that the roller body assembly is damaged and fails due to poor splash lubrication effect between the roller and the roller pin of the traditional oil supply pump.
6) Two symmetrical flat grooves are formed in the roller pin, two oil storage grooves are formed between the two flat grooves and the inner hole of the bushing so as to store more press oil, forced lubrication between the bushing and the roller pin is realized, the surfaces of the roller pin and the bushing kinematic pair can be sufficiently lubricated by the forced lubrication, and the lubrication and cooling effects are ensured.
7) The roller body is provided with the long groove, the guide pin screwed into the pump body enters the long groove of the roller body, the auxiliary guide function can be realized on the axial reciprocating motion of the roller body assembly, the roller body assembly is prevented from rotating in the pump body mounting hole, the roller body is uniformly provided with a plurality of pore canals, and the weight of the roller body can be effectively reduced and the material can be saved through the pore canals. The bushings are made of beryllium bronze and are pressed into the inner holes of the rollers in an interference mode, and the beryllium bronze has the characteristics of being low in friction coefficient, good in wear resistance and high temperature resistance, and good operation of the rollers and roller pin kinematic pairs is guaranteed.
Drawings
FIG. 1 is a schematic diagram of a pump rail integrated electric control common rail high pressure oil supply system assembly.
Fig. 2 is a structural plan view of an integrated pump rail electric control common rail high-pressure oil supply system assembly.
Fig. 3 is a partial enlarged view of the joint surface of the pump body and the rail body in the pump rail integrated electric control common rail high pressure oil supply system assembly.
Fig. 4 is an enlarged view of a portion a of fig. 3.
FIG. 5 is a schematic diagram of the oil storage cavity and the oil inlet hole in the rail body of the integrated pump rail electric control common rail high pressure oil supply system assembly.
Fig. 6 is a schematic diagram of a special seal ring structure between a pump body and a rail body in an integrated pump rail electric control common rail high pressure oil supply system assembly.
FIG. 7 is a schematic diagram of the installation position of the roller body assembly in the pump body cavity in the pump rail integrated electric control common rail high pressure oil supply system assembly.
Fig. 8 is a schematic structural diagram of a roller assembly in the pump rail integrated electric control common rail high pressure oil supply system assembly of the present invention.
Fig. 9 is a schematic diagram of a lubrication duct of a roller body in an integrated pump rail electric control common rail high pressure oil supply system assembly according to the present invention.
Fig. 10 is a sectional view taken along the direction A-A in fig. 9.
FIG. 11 is a schematic diagram of a lubrication duct of a roller pin of an integrated pump rail electrically controlled common rail high pressure oil supply system assembly according to the present invention.
FIG. 12 is a sectional view taken along the direction B-B in FIG. 11.
Fig. 13 is a schematic diagram of a long groove structure of a roller body assembly in an integrated pump rail electric control common rail high pressure oil supply system assembly according to the present invention.
Fig. 14 is a left cross-sectional view of a roller body assembly in a pump rail integrated electric control common rail high pressure oil supply system assembly according to the present invention.
In the figure: 1. a pump body; 2. a special-shaped sealing ring; 3. a seal ring; 4. a pressure limiting valve member; 5. a rail body; 6. a pump oil system component; 7. sealing the endless belt; 8. a rail pressure sensor; 9. an oil pipe joint; 10. an oil storage chamber; 11. an oil inlet hole; 12. oil return holes of the pressure limiting valve; 13. oil return holes of the leakage cavity; 14. the leakage cavity passes through the oil groove; 15. high-pressure oil outlet holes; 16. a total oil return hole; 17. an oil return pipe bolt; 18. an overflow valve of the oil feed pump; 19. a high-pressure oil chamber; 20. a low pressure leakage chamber; 21. throttling and blocking; 22. an oil inlet passage; 23. a thread pair; 24. a roller body; 25. a cylindrical pin; 26. a roller pin; 27. ball expansion type plug; 28. a bushing; 29. a roller; 30. a long groove; 31. a flat slot; 32. a roller body assembly; 33. a cam shaft; 34. a duct.
Wherein in fig. 8-12: a. a first lubrication port; b. a second lubrication port; c. a third lubrication port; d. and a fourth lubrication duct.
Detailed Description
The following description of the embodiments of the present invention will be made more fully hereinafter with reference to the accompanying drawings, in which it is shown, however, in an illustrative embodiment of the invention, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
The utility model provides an integrative automatically controlled rail high pressure oil feeding system assembly of pump rail, includes high pressure oil feed pump assembly, common rail pipe assembly and sealing mechanism thereof, the common rail pipe assembly is installed in high pressure oil feed pump assembly top, high pressure oil feed pump assembly adopts multi-cylinder in-line overall arrangement, high pressure oil feed pump assembly includes pump body 1, camshaft 33, gyro wheel body subassembly 32, pump oil system part 6 installs in the pump oil system mounting hole of pump body 1, gyro wheel body subassembly 32 installs in pump oil system part 6 below, camshaft 33 is in the camshaft mounting cavity of pump body 1 lower part and with gyro wheel body subassembly 32 butt, when camshaft 33 rotatory, drives gyro wheel body subassembly 32 back and forth and drives pump oil system part 6 work, be equipped with oil feed channel 22 on pump body 1, oil feed channel 22 runs through each cylinder hole, still be equipped with total oil return hole 16 on the pump body 1, total oil return hole 16 tip is equipped with oil return pipe 17, oil return pipe 17 installs in the camshaft mounting cavity of pump body 1 lower part, oil return pipe 17 is installed on pump body 1 one side.
The common rail pipe assembly comprises a pressure limiting valve component 4, a rail body 5, rail pressure sensors 8 and an oil pipe joint 9, wherein the pressure limiting valve component 4 is installed at the left end of the rail body 5, when the pressure in the rail body 5 is abnormally increased, the pressure limiting valve component 4 is opened, so that safe rail pressure is arranged in the rail body 5, the rail pressure sensors 8 are installed at the right end of the rail body 5 and used for monitoring the diesel pressure of the rail body 5 in real time, the oil pipe joint 9 is installed at two sides of the middle part of the rail body 5, the oil pipe joint 9 is used for connecting a high-pressure oil pipe so as to convey high-pressure diesel oil in the rail body 5 into an oil injector, two oil storage cavities 10 which are longitudinally penetrated through the whole rail body 5 are arranged in the rail body 5, an oil inlet hole 11 is formed in the position of each oil storage cavity 10 of the rail body, a leakage cavity oil return hole 13 and a pressure limiting valve oil return hole 12 are formed in the left end of the pump body 1, a throttle plug 21 is installed at the bottom of the pressure limiting valve oil return hole 12, the upper end face 12 of the rail body 1 is positioned at the middle part of the side of the rail body 1 and is communicated with the oil storage cavity 12 of the low-pressure oil guide hole 14, the pressure cavity 14 is formed in the middle part of the pressure limiting valve cavity 14, and the pressure cavity is communicated with the low-pressure oil storage cavity 14 through the pressure cavity 16, and the pressure cavity 14 is formed in the middle part of the pressure limiting cavity 4.
The sealing mechanism comprises a high-pressure sealing cover between the upper end surface of a pump oil system component 6 and the bottom surface of a rail body 5, a special-shaped sealing ring 2 and a good sealing ring 3 between the pump body 1 and the rail body 5, wherein the upper end surface of the pump oil system component 6 and the lower plane of the rail body 5 connected with the upper end surface are finish machining planes, the two finish machining planes are firmly contacted by screwing the pump oil system component 6 to form a sealing ring belt 7, high-pressure diesel oil coming out of the pump oil system component 6 is ensured to enter the oil storage cavity 10 after passing through a high-pressure oil cavity 19 and an oil inlet hole 11, the special-shaped sealing ring 2 is arranged in a sealing groove on the upper end surface of the pump body 1, the special-shaped sealing ring 2 can seal the low-pressure leakage cavity 20 of all the pump oil system components in one space, the special-shaped sealing ring 2 adopts a mode of end surface sealing, the sealing ring is free from tensile force, the installation is convenient, the sealing ring effectively improves the sealing effect, the good sealing ring 3 is installed between the pump body 1 and the rail body 5, is used for preventing oil from leaking at an oil return hole 12 of a limiting valve, the pump body 1 and the rail body 5 from passing through a high-pressure sealing ring belt 7 which is tightly attached to the rail body 5, the high-pressure diesel oil passes through the high-pressure oil cavity 19, the high-pressure sealing ring and the oil cavity 2 is formed by the high-pressure sealing ring belt 1, the low-pressure sealing ring belt 1 and the low-pressure sealing ring 2 passes through the low-pressure sealing ring 1 and the low pressure sealing ring 12, and the low-pressure sealing ring 1, and the low pressure sealing ring 20, and the high pressure sealing ring has a certain pressure sealing ring channel, and the high pressure sealing ring and the sealing ring, and the high pressure sealing ring, and the sealing ring has the pressure sealing ring and the sealing ring, and the principle. The diesel oil with certain pressure leaked from each cylinder of the oil feed pump is gathered to the cylinder hole near the oil return pipe bolt 17 through the leakage cavity through the oil groove 14, then flows into the pressure limiting valve oil return hole 12 through the leakage cavity oil return hole 13, and finally flows into the oil tank through the total oil return hole 16 and the oil return pipe bolt 17.
The pump oil system part 6 is connected with the pump body through the screw thread pair 23, diesel oil in an oil inlet cavity in the oil supply pump possibly has slight leakage, and after the diesel oil leaked from each cylinder hole is gathered through the oil groove 14 through the leakage cavity on the rail body 5, the diesel oil enters the total oil return hole 16 through the leakage cavity oil return hole 13 arranged on the rail body 5, so that the waste of the diesel oil is reduced.
The roller body component 32 comprises a roller body 24, a roller pin 26, a ball expansion plug 27, a bushing 28 and a roller 29, wherein the roller pin 26 is arranged in a transverse hole of the roller body and is fixed on the roller body 24 through a cylindrical pin 25, a first lubrication hole channel a is symmetrically formed on the roller body 24, a second lubrication hole channel b is symmetrically formed on the roller pin 26, the roller pin 26 does not rotate on the roller body 24, the axial play of the roller pin 26 in the transverse hole of the roller body is avoided, meanwhile, the first lubrication hole channel a on the roller body 24 and the second lubrication hole channel b on the roller pin 26 can be aligned, the oil way is kept smooth, the bushing 28 is pressed into a roller inner hole in an interference manner to form a roller assembly, the roller assembly is sleeved on the roller pin 26 to form a motion pair of the roller 29 and the roller pin 26, a third lubrication hole channel c and a fourth lubrication hole channel d are further formed on the roller pin 26, the third lubrication duct c is vertically communicated with the fourth lubrication duct d, the second lubrication duct b is disposed at two sides of the third lubrication duct c and is communicated with the third lubrication duct c, the ball expansion plug 27 is mounted at an opening end of the third lubrication duct c, so that loss of lubricating oil pressure caused by flowing out of the opening end of the third lubrication duct c on the roller pin 26 can be prevented, lubricating oil with a certain pressure in the pump body 1 enters the roller body assembly 32 from the symmetrical first lubrication duct a on the roller body 24 through the lubrication duct on the pump body, and because the first lubrication duct a, the second lubrication duct b, the third lubrication duct c and the fourth lubrication duct d are mutually communicated in sequence, the lubricating oil finally enters the working surface of the roller pin 26 and the bush 28 from the fourth lubrication duct d, the symmetrical first lubrication channel a and second lubrication channel b can prevent the roller body assembly 32 from being blocked in the guide hole of the pump body 1 due to the lateral force of engine oil.
The roller pin 26 is provided with two flat grooves 31, two oil storage grooves are formed in the working surface matched with the bushing 28 through the flat grooves 31 so as to store more press oil, forced lubrication between the bushing 28 and the roller pin 26 is realized, the forced lubrication can ensure that the surfaces of the roller pin 26 and the kinematic pair of the bushing 28 are sufficiently lubricated, lubrication and cooling effects are ensured, the roller body 24 is provided with the long groove 30, when the guide pin screwed into the pump body 1 enters the long groove 30, the axial reciprocating motion of the roller body assembly 32 can be assisted, the roller body assembly 32 is prevented from rotating in the mounting hole of the pump body 1, the roller body 24 is uniformly provided with a plurality of pore channels 34, the weight of the roller body 24 can be effectively reduced through the pore channels 34, materials are saved, the bushing 28 is made of beryllium bronze, and the beryllium bronze has the characteristics of low friction coefficient, good wear resistance and high temperature resistance, and good running of the roller 29 and the kinematic pair of the roller pin 26 are ensured.
The foregoing is merely illustrative and explanatory of the invention, as it is well within the scope of the invention as claimed, as it relates to various modifications, additions and substitutions for those skilled in the art, without departing from the inventive concept and without departing from the scope of the invention as defined in the accompanying claims.
Claims (7)
1. The utility model provides an automatically controlled rail high pressure oil feed system assembly of pump rail an organic whole, its characterized in that includes high pressure oil feed pump assembly, common rail pipe assembly and sealing mechanism thereof, common rail pipe assembly installs in high pressure oil feed pump assembly top, high pressure oil feed pump assembly adopts multi-cylinder in-line overall arrangement, high pressure oil feed pump assembly includes the pump body, camshaft, gyro wheel body subassembly, pump oil system part is installed in the pump oil system mounting hole of pump body upper portion, pump oil system part passes through the screw pair with the pump body and connects, gyro wheel body subassembly is installed below pump oil system part, the camshaft traverses in the camshaft intracavity of pump body lower part and with gyro wheel body subassembly butt, be equipped with the oil feed passageway on the pump body, the oil feed passageway runs through four cylinder body holes, still be equipped with total oil return hole on the pump body, total oil return hole tip is equipped with the oil return pipe bolt, the oil return pipe bolt is installed on the pump body, oil feed pipe bolt one side of the pump body still installs the oil feed pump overflow valve;
the common rail pipe assembly comprises a pressure limiting valve component, a rail body, a rail pressure sensor and an oil pipe joint, wherein the pressure limiting valve component is arranged at the left end of the rail body, the rail pressure sensor is arranged at the right end of the rail body, the oil pipe joint is arranged at two sides of the middle part of the rail body, two oil storage cavities which longitudinally penetrate through the whole rail body are arranged in the rail body, an oil inlet hole is formed in the lower part of the oil storage cavity corresponding to each cylinder body hole in the pump body, a leakage cavity oil return hole and a pressure limiting valve oil return hole are formed in the left end of the pump body, a throttling plug is arranged at the bottom of the pressure limiting valve oil return hole, the pressure limiting valve oil return hole is positioned in the middle of the left side of the upper end face of the pump body, the pressure limiting valve oil return hole is communicated with the leakage cavity oil return hole, a leakage cavity oil passing groove is formed between the lower part of the rail body and two adjacent cylinder holes, a high-pressure oil outlet hole is formed in the left side of the middle part of the rail body, and the high-pressure oil outlet hole is communicated with the oil storage cavity.
2. The integrated electronic control common rail high-pressure oil supply system assembly of claim 1, wherein the sealing mechanism comprises a high-pressure sealing cover between the upper end face of the pump oil system component and the bottom face of the rail body, a special-shaped sealing ring and a special-shaped sealing ring between the pump body and the rail body, the upper end face of the pump oil system component and the lower plane of the rail body connected with the upper end face of the pump oil system component are finish planes, the two finish planes are in hard contact to form a sealing ring belt by screwing the pump oil system component, the special-shaped sealing ring is arranged in a sealing groove on the upper end face of the pump body, the special-shaped sealing ring is in a form of end face sealing, the special-shaped sealing ring is arranged between the pump body and the rail body, the pump body and the rail body are integrated into a whole through a tightly attached high-pressure sealing plane, a high-pressure oil cavity formed among the pump body, the rail body and the sealing ring belt is formed by the high-pressure sealing plane, and the pump oil system component, the rail body, the sealing ring belt and the leakage cavity pass through an oil groove.
3. The pump rail integrated electric control common rail high-pressure oil supply system assembly according to claim 1, wherein the roller body assembly comprises a roller body, a roller pin, a ball expansion type plug, a bushing and a roller, the roller pin is arranged in a roller body hole and is fixed on the roller body through a cylindrical pin, a first lubrication pore canal is symmetrically arranged on the roller body, a second lubrication pore canal is symmetrically arranged on the roller pin, the bushing is pressed into the roller hole in an interference manner to form a roller assembly, the roller assembly is sleeved on the roller pin to form a kinematic pair of the roller and the roller pin, the roller pin is further provided with a third lubrication pore canal and a fourth lubrication pore canal, the third lubrication pore canal is vertically communicated with the fourth lubrication pore canal, the second lubrication pore canal is arranged on two sides of the roller pin and is communicated with the third lubrication pore canal, and the ball expansion type plug is arranged at the opening end of the third lubrication oil duct.
4. A pump rail integrated electrically controlled common rail high pressure oil supply system assembly according to claim 3, wherein the roller pin is provided with two symmetrical flat grooves, and two oil storage grooves are formed on the working surface between the two flat grooves and the inner hole of the bushing.
5. A pump rail integrated electrically controlled common rail high pressure oil supply system assembly as set forth in claim 3 wherein said roller body is provided with elongated slots.
6. The pump rail integrated electric control common rail high pressure oil supply system assembly according to claim 3, wherein a plurality of pore canals are uniformly distributed on the roller body.
7. A pump rail integrated electrically controlled common rail high pressure oil supply system assembly as set forth in claim 3 wherein said bushing is made of beryllium bronze.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210017049.2A CN114278475B (en) | 2022-01-07 | 2022-01-07 | Pump rail integrated electric control common rail high-pressure oil supply system assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210017049.2A CN114278475B (en) | 2022-01-07 | 2022-01-07 | Pump rail integrated electric control common rail high-pressure oil supply system assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114278475A CN114278475A (en) | 2022-04-05 |
| CN114278475B true CN114278475B (en) | 2023-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210017049.2A Active CN114278475B (en) | 2022-01-07 | 2022-01-07 | Pump rail integrated electric control common rail high-pressure oil supply system assembly |
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Citations (13)
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| GB9107467D0 (en) * | 1990-07-16 | 1991-05-22 | Diesel Tech Corp | Common rail fuel injection system |
| JP2004506842A (en) * | 2000-09-20 | 2004-03-04 | スタナディーン コーポレイション | A flow intensifier for cold starting a gasoline direct injection engine. |
| JP2004156574A (en) * | 2002-11-06 | 2004-06-03 | Atsushi Saito | Fluid loss/oil pressure fluctuation reducing structure for common rail (cr) fuel injection system |
| CN202012427U (en) * | 2011-03-02 | 2011-10-19 | 无锡威孚高科技集团股份有限公司 | Common-rail high-pressure pump with integrated pump and rail |
| KR101189708B1 (en) * | 2011-04-13 | 2012-10-11 | 재단법인 전북자동차기술원 | Fuel pump driving apparatus of diesel engine with common rail |
| CN103244329A (en) * | 2013-04-28 | 2013-08-14 | 哈尔滨工程大学 | High-pressure common-rail fuel system with electric monoblock pumps |
| KR20130114538A (en) * | 2012-04-09 | 2013-10-17 | 조선대학교산학협력단 | Diagnosis device of troubling fuel pressure control valve for electronic control diesel engine |
| CN105464870A (en) * | 2014-09-27 | 2016-04-06 | 曼柴油机和涡轮机欧洲股份公司 | Fuel pump |
| CN106121888A (en) * | 2016-08-26 | 2016-11-16 | 龙口龙泵燃油喷射有限公司 | Single cylinder high pressure co-rail diesel pump assembly for common rail system |
| CN107061090A (en) * | 2017-04-22 | 2017-08-18 | 山东鑫亚格林鲍尔燃油系统有限公司 | A kind of high voltage common rail pump is with entering fuel-displaced compound control structure |
| CN109184998A (en) * | 2018-11-09 | 2019-01-11 | 广西玉柴机器股份有限公司 | The high pressure co-rail system of V-type multi-cylinder diesel engine |
| CN110671224A (en) * | 2019-11-08 | 2020-01-10 | 重庆红江机械有限责任公司 | Low-speed machine high pressure common rail system with multiple security functions |
| CN112780470A (en) * | 2020-12-10 | 2021-05-11 | 重庆红江机械有限责任公司 | Common rail type high-pressure fuel injection pump for marine high-speed diesel engine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6484696B2 (en) * | 2001-04-03 | 2002-11-26 | Caterpillar Inc. | Model based rail pressure control for variable displacement pumps |
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2022
- 2022-01-07 CN CN202210017049.2A patent/CN114278475B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9107467D0 (en) * | 1990-07-16 | 1991-05-22 | Diesel Tech Corp | Common rail fuel injection system |
| JP2004506842A (en) * | 2000-09-20 | 2004-03-04 | スタナディーン コーポレイション | A flow intensifier for cold starting a gasoline direct injection engine. |
| JP2004156574A (en) * | 2002-11-06 | 2004-06-03 | Atsushi Saito | Fluid loss/oil pressure fluctuation reducing structure for common rail (cr) fuel injection system |
| CN202012427U (en) * | 2011-03-02 | 2011-10-19 | 无锡威孚高科技集团股份有限公司 | Common-rail high-pressure pump with integrated pump and rail |
| KR101189708B1 (en) * | 2011-04-13 | 2012-10-11 | 재단법인 전북자동차기술원 | Fuel pump driving apparatus of diesel engine with common rail |
| KR20130114538A (en) * | 2012-04-09 | 2013-10-17 | 조선대학교산학협력단 | Diagnosis device of troubling fuel pressure control valve for electronic control diesel engine |
| CN103244329A (en) * | 2013-04-28 | 2013-08-14 | 哈尔滨工程大学 | High-pressure common-rail fuel system with electric monoblock pumps |
| CN105464870A (en) * | 2014-09-27 | 2016-04-06 | 曼柴油机和涡轮机欧洲股份公司 | Fuel pump |
| CN106121888A (en) * | 2016-08-26 | 2016-11-16 | 龙口龙泵燃油喷射有限公司 | Single cylinder high pressure co-rail diesel pump assembly for common rail system |
| CN107061090A (en) * | 2017-04-22 | 2017-08-18 | 山东鑫亚格林鲍尔燃油系统有限公司 | A kind of high voltage common rail pump is with entering fuel-displaced compound control structure |
| CN109184998A (en) * | 2018-11-09 | 2019-01-11 | 广西玉柴机器股份有限公司 | The high pressure co-rail system of V-type multi-cylinder diesel engine |
| CN110671224A (en) * | 2019-11-08 | 2020-01-10 | 重庆红江机械有限责任公司 | Low-speed machine high pressure common rail system with multiple security functions |
| CN112780470A (en) * | 2020-12-10 | 2021-05-11 | 重庆红江机械有限责任公司 | Common rail type high-pressure fuel injection pump for marine high-speed diesel engine |
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|---|---|
| CN114278475A (en) | 2022-04-05 |
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