CN113958437A - Special novel eccentric oil pump - Google Patents

Special novel eccentric oil pump Download PDF

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Publication number
CN113958437A
CN113958437A CN202111365389.6A CN202111365389A CN113958437A CN 113958437 A CN113958437 A CN 113958437A CN 202111365389 A CN202111365389 A CN 202111365389A CN 113958437 A CN113958437 A CN 113958437A
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CN
China
Prior art keywords
oil
plunger
valve
flange bearing
rotor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202111365389.6A
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Chinese (zh)
Inventor
于建锋
王景致
徐小松
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Junfeng Electric Control Technology Taizhou Co ltd
Original Assignee
Junfeng Electric Control Technology Taizhou Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Junfeng Electric Control Technology Taizhou Co ltd filed Critical Junfeng Electric Control Technology Taizhou Co ltd
Priority to CN202111365389.6A priority Critical patent/CN113958437A/en
Publication of CN113958437A publication Critical patent/CN113958437A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/02—Pressure lubrication using lubricating pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/46—Valves
    • F02M59/462—Delivery valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/46—Valves
    • F02M59/464—Inlet valves of the check valve type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/46—Valves
    • F02M59/466—Electrically operated valves, e.g. using electromagnetic or piezoelectric operating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/02—Pressure lubrication using lubricating pumps
    • F01M2001/0207—Pressure lubrication using lubricating pumps characterised by the type of pump
    • F01M2001/0238—Rotary pumps

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Rotary Pumps (AREA)

Abstract

The invention relates to the technical field of high-pressure common rail fuel systems, in particular to a special novel eccentric oil pump. The technical scheme adopted by the invention is as follows: the oil valve device is characterized by comprising a flange bearing seat, a driving shaft is installed at the center of the left side of the flange bearing seat, a plunger device is arranged at the upper end of the flange bearing seat, a sliding sheet type oil transfer pump is connected to the right side of the flange bearing seat, the upper end of the plunger device is connected and installed with an oil valve component, an electromagnetic valve is connected to the upper end of the right side of the flange bearing seat through an oil inlet metering valve, the plunger device is composed of a plunger sleeve and a plunger main body, and the oil valve component comprises an oil inlet valve, an oil outlet valve, an oil inlet hole and an oil outlet hole. The invention has the advantages that: adopt brand-new structural design, overall structure is compact, light small and exquisite and fuel feeding is efficient, the good reliability, can be used for multiple power section, and the security when using is better, and whole durability is stronger, and application range is also wider.

Description

Special novel eccentric oil pump
Technical Field
The invention relates to the technical field of high-pressure common rail fuel systems, in particular to a special novel eccentric oil pump.
Background
In the field of vehicles, common rail technology is increasingly being employed. The generation of the fuel pressure and the injection of the fuel in the common rail type fuel injection system are separated from each other, the fuel is pressurized by a high-pressure supply pump and then injected into the common rail, and the common rail is connected in turn in a branched form to injectors of an electronic control unit, each of which contains a precisely machined nozzle and a plunger driven by an electromagnetic solenoid. The electronic control unit controls each solenoid valve to inject fuel into a corresponding engine cylinder. The eccentric oil pump of the present invention is therefore a critical component in a common rail system.
Nowadays, diesel engines still occupy a considerable share of power systems, but with the increasing importance of people on environmental protection and energy conservation, the pollutant emission of power assemblies becomes the focus of international social attention. Emission regulations are becoming stricter, and diesel engines have increasingly high requirements on the stability and efficiency of high-pressure common rail fuel systems in order to meet emission requirements below national 5. In the prior art, the high-pressure common rail oil pump matched with the same power engine is mostly of a structure with two cylinders and above, the size is large, the reliability of key parts is not high, the efficiency is low, and high maintenance cost is caused. In addition, the oil quantity control of the lubricating oil way can be ensured, and the problem that the engine is difficult to start due to excessive lubricating oil under the condition of low speed is easy to occur; or the lubricating oil is too little under the high-speed condition, so that the ideal heat dissipation effect cannot be achieved.
Disclosure of Invention
The invention aims to provide a special novel eccentric oil pump which adopts a brand new structural design, has a compact, light and small integral structure, high oil supply efficiency and good reliability, and can be used for various power sections. The oil pump can perfectly meet the requirement of the emission standard below 5, can increase the number of plunger parts according to the actual power requirement, can be made into an eccentric double-cylinder oil pump with the same principle, and has stronger flexibility and wider application range when in use.
The technical scheme of the invention is as follows:
a special novel eccentric oil pump is characterized in that: comprises a flange bearing seat, a driving shaft is arranged at the center of the left side of the flange bearing seat, a plunger device is arranged at the upper end of the flange bearing seat, the right side position of the flange bearing seat is connected with a sliding vane type oil transfer pump, the upper end of the plunger device is connected and installed with an oil valve component, the upper end of the right side of the flange bearing seat is connected with an electromagnetic valve through an oil inlet metering valve, the plunger device consists of a plunger sleeve and a plunger main body, the oil valve component comprises an oil inlet valve, an oil outlet valve, an oil inlet hole and an oil outlet hole, the oil inlet hole is of a circular arc structure arranged on the side, the sliding vane type oil transfer pump comprises a rotor, an eccentric ring, an oil transfer pump cover and a lining plate, wherein four sliding vanes which are uniformly distributed on the circumference are arranged on the rotor, the eccentric ring and the lining plate are respectively positioned on two sides of the rotor, and a lubricating oil way throttling hole is formed in the center of the interior of the rotor.
Furthermore, a combined smooth conical transition oil hole is formed in the matched position of the plunger sleeve and the inside of the plunger main body.
Further, the oil inlet valve is of a spherical structure and is installed through spring connection.
Furthermore, the inner side of the sliding sheet is a circular arc-shaped matching stabilizing groove.
Furthermore, a combined stable anti-loosening groove is formed in the matching position of the rotor and the sliding piece.
Furthermore, a key groove is formed in the inner mounting hole of the rotor, and a reinforcing combined boss is arranged on the inner side of the key groove.
The invention has the beneficial effects that:
1) the contact length of the bottom of the plunger is lengthened, so that the contact stress between the plunger and the roller is reduced, and the reliability of the plunger and the roller is improved.
2) The oil quantity of the lubricating oil path is controlled by the throttle orifice and the bearing bush clearance. At low speed, the amount of lubricating oil is limited within a controllable range, and starting is not affected. At high speed, the lubricating oil quantity is improved, heat generated by friction of the bearing bush is taken away, and good lubrication is established.
3) The vane type oil transfer pump has simple structure, no spring structure and reliable operation.
4) After the lift is increased, the displacement is equal, the diameter of the plunger is reduced, and the leakage amount of the clearance of the plunger is reduced. The oil supply efficiency of the oil pump is greatly improved.
5) The large eccentric oil pump of the invention is suitable for engines with long power sections.
Drawings
FIG. 1 is a schematic cross-sectional view of the present invention;
FIG. 2 is a schematic view of the plunger assembly of the present invention;
FIG. 3 is a schematic cross-sectional view of an oil valve assembly according to the present invention;
FIG. 4 is a schematic diagram of an exploded structure of the sliding vane type oil transfer pump of the present invention;
FIG. 5 is a schematic front view of a rotor of the present invention;
in the figure: 01. flange bearing seat, 02, driving shaft, 03, plunger device, 04, sliding vane type oil transfer pump, 06, oil inlet metering valve, 07, electromagnetic valve, 0301, plunger sleeve, 0302, plunger body, 0303, oil inlet valve, 0304, oil outlet valve, 0305, oil inlet hole, 0306, oil outlet hole, 0401, rotor, 0402, sliding vane, 0403, eccentric ring, 0404, oil transfer pump cover, 0405, lining plate, 0406, lubricating oil way orifice, 0407 and key groove.
Detailed Description
As shown in fig. 1 to 5, a special novel eccentric oil pump adopts a brand new structural design, has a compact overall structure, is light and small, has high oil supply efficiency and good reliability, and can be used for various power sections. The oil pump can perfectly meet the requirement of the emission standard below 5, can increase the number of plunger parts according to the actual power requirement, can be made into an eccentric double-cylinder oil pump with the same principle, and has stronger flexibility and wider application range when in use. The flange bearing seat comprises a flange bearing seat 01, a driving shaft 02 is installed at the center position of the left side of the flange bearing seat 01, a plunger device 03 is arranged at the upper end of the flange bearing seat 01, a sliding vane type oil delivery pump 04 is connected at the right side position of the flange bearing seat 01, the upper end of the plunger device 03 is connected with an oil valve component together, an electromagnetic valve 07 is connected at the upper end position of the right side of the flange bearing seat 01 through an oil inlet metering valve 06, the plunger device 03 consists of a plunger sleeve 0301 and a plunger main body 0302, the oil valve component comprises an oil inlet valve 0303, an oil outlet valve 0304, an oil inlet 0305 and an oil outlet 0306, the oil inlet 0305 is of a laterally arc-shaped structure, the sliding vane type oil delivery pump 04 comprises a rotor 0401, an eccentric ring 0403, an oil delivery pump cover 0404 and a liner 5, four sliding vanes 0402 which are uniformly distributed on the circumference of the rotor 0401, the eccentric ring 0403 and the liner 0405 are respectively located at two sides of the rotor 0401, a lubricating oil path throttle hole 0406 is provided in the center of the inside of the rotor 0401.
The drive shaft 02 is connected with the key groove 0407 of the rotor through a key, the oil inlet bolt on the pump body part 08 is connected with an external oil tank, fuel enters the oil cavity of the rotor 0401 from the oil inlet hole of the liner 0405 through a hole in the pump body, the slide 0402 is in line contact with the eccentric ring 0403 by centrifugal force and generates sealing by the oil film to form four independent oil cavities. Due to the existence of the eccentric ring 0403, the volumes of the oil chambers are different, and along with the phase change of the driving shaft 02, when the oil chamber is shifted to the phase of the oil outlet, the volume of the oil chamber is reduced, the pressure is increased, and the fuel oil flows into the oil inlet metering valve 06 from the oil outlet. The sliding vane type oil transfer pump has a simple structure and only comprises a rotor 0401, a sliding vane 0402, an eccentric ring 0403, an oil transfer pump cover 0404 and a lining plate 0405. Has high reliability. Compare in traditional oil pump, because welt 0405's design, peel off oil inlet and oil outlet from pump body part, let sliding vane fuel delivery pump's replaceability stronger, the maintenance of the pump body is lighter. After diesel oil passes through the proportional solenoid valve 07, a certain valve opening pressure is formed in front of the oil inlet valve, and the solenoid valve 07 transmits an electric signal to the control module.
The driving shaft 02 is an eccentric structure, and the cam of the driving shaft drives the plunger 0302 to do reciprocating motion similar to sine in the vertical direction through a sleeve, wherein the phases of an oil inlet and an oil outlet in the liner 0405 correspond to the phase of the cam of the driving shaft 02, namely when the oil supply efficiency of the sliding vane type oil transfer pump 04 is maximum, the plunger 0302 is at the trough position similar to sine motion; and when the oil supply efficiency is the slowest, the plunger 0302 is at the peak position of the quasi-sinusoidal motion.
In the structure shown in fig. 3, the plunger oil inlet valve 0304 and the plunger oil outlet valve 0303 are connected in series in the vertical direction. In the oil inlet stage, a plunger 0302 descends from the top dead center of a stroke, diesel enters a buffer ring band from an oil inlet hole 0305 of an oil inlet valve, the pressure in a plunger part is gradually increased, when the opening pressure of the oil inlet valve 0304 is reached, a valve core of the oil inlet valve ascends under the action of the pressure to open, the diesel enters a vertical hole of the oil inlet valve from the buffer ring band, the diesel enters a closed space (plunger part) at the bottom of an oil inlet valve seat through the vertical hole of the oil inlet valve seat, the diesel continuously enters a plunger device 03 along with the descending of the plunger 0302, the pressure in the plunger part is continuously reduced until the plunger 0302 runs to a bottom dead center, the pressure in the closed space and the pressure outside a cavity reach balance, and the diesel cannot be pressed into the closed space by the air pressure at the moment, so that the oil inlet is completed; in the oil supply stage, the oil inlet valve 0304 is already in a closed state due to the action of the spring force of the oil inlet valve spring, the oil outlet valve steel ball is also in a closed state due to the action of the oil outlet valve spring (rail pressure), at the moment, the oil inlet valve 0304, the oil outlet valve 0303 and the top of the plunger 0302 form an oil pressing area, the pressure in the oil pressing area gradually increases along with the upward movement of the plunger 0302, when the pressure in the oil pressing area is compressed to be higher than the resultant force of the back pressure and the spring force after the oil outlet valve 0303, oil passes through the vertical hole of the oil inlet valve seat to the bottom of the oil outlet valve 0303 to generate upward hydraulic pressure to open the oil pressing area, high-pressure oil is supplied into the rail pipe, and after the plunger 0302 runs to the top dead center, the oil supply stroke is finished, and one oil supply cycle is completed.
Compared with the plunger assembly in the traditional oil supply pump, the plunger 0302 of the invention has larger area at the bottom, the contact length of the plunger 0302 and the drive shaft sleeve becomes longer, and the modification reduces the contact stress between the plunger 0302 and the sleeve, and increases the reliability and the service life of the component.
It is important to note that the plunger assembly 03 of the present invention has a greater lift, which means that even a single cylinder configuration can provide a greater amount of oil delivery. While the present invention has been described with the benefit of the increased stroke of the ram assembly 03, it is believed that the present invention suitably reduces the ram diameter, which in design is a factor of the ram-to-ram sleeve clearance, while in practice machining may provide greater accuracy due to the reduced theoretical size of the ram diameter.
As shown in fig. 5, when the sliding vane type fuel feed pump supplies fuel to the plunger assembly, a part of the diesel oil flows to the drive shaft side through the orifice 0406, and lubricates the drive shaft shoe, the drive shaft, and the roller. At this time, if the engine is in a low-speed running state, the number of revolutions of the drive shaft 02 is low, and the amount of lubricating oil flowing through the rotor orifice 0406 is relatively small, and does not affect the start and running of the engine, whereas if the number of revolutions is high, the amount of lubricating oil flowing into the gap between the shoe and the drive shaft through the orifice 0406 becomes large, and the heat generated by the friction between the shoe and the drive shaft 02 is taken away. In addition, the clearance fit between the bearing shell and the drive shaft 02 also serves to control the amount of lubrication flow.
The number of plunger members can be increased in accordance with the principles of the present invention to meet the demand for higher power diesel engines, depending on the displacement requirements.
Preferably, a combined smooth conical transition oil hole is formed in the matched position inside the plunger sleeve 0301 and the plunger main body 0302, so that the smoothness is better when the plunger sleeve 0302 is used.
Preferably, the inner side of the slide piece 0402 is a circular arc-shaped engagement stabilizing groove, which can be brought into contact with the fastening pin over a larger area during engagement, and the engagement stability is more reliable.
Preferably, a stable anti-loosening groove is formed in the position where the rotor 0401 and the slide piece 0402 are engaged, so that a larger space is ensured during installation and assembly, and the connection strength during assembly can be further improved.
Preferably, a key groove 0407 is provided in the inner mounting hole of the rotor 0401, and a reinforcing and combining boss is provided inside the key groove 0407, so that the combination firmness of the inner center position is better, and the durability in use is higher.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications or substitutions can be made without departing from the principle of the present invention, and these modifications or substitutions should also be considered as the protection scope of the present invention.

Claims (6)

1. A special novel eccentric oil pump is characterized in that: including flange bearing frame (01), drive shaft (02) are installed to the left side central point of flange bearing frame (01), the upper end of flange bearing frame (01) is equipped with plunger device (03), the right side position of flange bearing frame (01) is connected with sliding vane formula fuel delivery pump (04), the upper end and the oil valve part of plunger device (03) are connected and are installed together, the right side upper end position of flange bearing frame (01) is connected with solenoid valve (07) through oil feed metering valve (06), plunger device (03) comprises plunger sleeve (0301) and plunger main part (0302), the oil valve part includes inlet valve (0303), outlet valve (0304), inlet port (0305) and oil outlet (0306), inlet port (0305) are for setting up the convex structure of side, sliding vane formula fuel delivery pump (04) include rotor (0401), eccentric ring (0403), The oil pump comprises an oil delivery pump cover (0404) and a lining plate (0405), wherein four slide plates (0402) which are uniformly distributed on the circumference are arranged on a rotor (0401), an eccentric ring (0403) and the lining plate (0405) are respectively positioned on two sides of the rotor (0401), and a lubricating oil way throttling hole (0406) is arranged in the center of the interior of the rotor (0401).
2. The new eccentric oil pump as claimed in claim 1, characterized in that: and a combined smooth conical transition oil hole is formed in the matched position of the plunger sleeve (0301) and the plunger main body (0302).
3. The new eccentric oil pump as claimed in claim 1, characterized in that: the oil inlet valve (0303) is of a spherical structure and is installed through spring connection.
4. The new eccentric oil pump as claimed in claim 1, characterized in that: the inner side of the sliding piece (0402) is a circular arc matching stable groove.
5. The new eccentric oil pump as claimed in claim 1, characterized in that: and a combined stable anti-loosening groove is formed in the matching position of the rotor (0401) and the sliding sheet (0402).
6. The new eccentric oil pump as claimed in claim 1, characterized in that: a key groove (0407) is arranged in an internal mounting hole of the rotor (0401), and a reinforced combined boss is arranged on the inner side of the key groove (0407).
CN202111365389.6A 2021-11-17 2021-11-17 Special novel eccentric oil pump Pending CN113958437A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111365389.6A CN113958437A (en) 2021-11-17 2021-11-17 Special novel eccentric oil pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111365389.6A CN113958437A (en) 2021-11-17 2021-11-17 Special novel eccentric oil pump

Publications (1)

Publication Number Publication Date
CN113958437A true CN113958437A (en) 2022-01-21

Family

ID=79471005

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111365389.6A Pending CN113958437A (en) 2021-11-17 2021-11-17 Special novel eccentric oil pump

Country Status (1)

Country Link
CN (1) CN113958437A (en)

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