CN113006897A - Engine gear pump structure with pre-lubrication function and control method thereof - Google Patents

Engine gear pump structure with pre-lubrication function and control method thereof Download PDF

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Publication number
CN113006897A
CN113006897A CN202110451016.4A CN202110451016A CN113006897A CN 113006897 A CN113006897 A CN 113006897A CN 202110451016 A CN202110451016 A CN 202110451016A CN 113006897 A CN113006897 A CN 113006897A
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CN
China
Prior art keywords
oil
engine
pump
oil supply
pneumatic motor
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Pending
Application number
CN202110451016.4A
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Chinese (zh)
Inventor
朱昌吉
张豪
高腾麟
李亚军
李岩
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Jilin University
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Jilin University
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Priority to CN202110451016.4A priority Critical patent/CN113006897A/en
Publication of CN113006897A publication Critical patent/CN113006897A/en
Pending legal-status Critical Current

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    • 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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C1/00—Rotary-piston machines or engines
    • F01C1/30—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F01C1/34—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members
    • F01C1/344—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • F01C1/3441—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F01C1/08 or F01C1/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C13/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01C13/04—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby for driving pumps or compressors
    • 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
    • F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/06—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations specially adapted for stopping, starting, idling or no-load operation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/06—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • F04C15/064—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston machines or pumps
    • F04C15/066—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston machines or pumps of the non-return type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C2/18—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with similar tooth forms
    • 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
    • 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
    • F01M2001/0253—Pressure lubrication using lubricating pumps characterised by the pump driving 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
    • F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
    • F01M2005/008—Lubrication means facilitating engine starting

Abstract

The invention belongs to the technical field of pre-lubrication of automobile engines, and particularly relates to an engine gear pump with a pre-lubrication function, which comprises a first pump body, a transmission gear, a first half key, a locking nut, a main gear shaft, a first bolt, a partition plate, a pump cover, a pneumatic motor shell, blades, a rotor, a second half key, a secondary gear shaft, a second bolt, a second pump body, an oil outlet, an oil inlet, a bolt hole, a first threaded hole, a second threaded hole, a spring, a metal ball, an air inlet, an exhaust port, a main oil supply circuit, a secondary oil supply circuit, a high-pressure air tank, an ECU and an electromagnetic valve.

Description

Engine gear pump structure with pre-lubrication function and control method thereof
Technical Field
The invention relates to the technical field of pre-lubrication of automobile engines, in particular to an engine gear pump structure with a pre-lubrication function and a control method thereof.
Background
According to data statistics, about 30% of energy in the world is consumed by various types of friction, and the engine is the same, and the internal abrasion loss power of the engines in different technical states accounts for 20% -25% of the indicated power, and the abrasion loss power of the engines in serious conditions can even reach about 35%. The wear of the vehicle engine is mainly manifested in the starting moment, particularly in cold and hot starts. Common tests by the society of automotive engineers and the dow gras company have shown that the wear of an engine at cold start accounts for between 60% and 80% of the total wear.
When an engine is started in a cold state, the traditional oil pump has a slow rotating speed, a crankshaft cannot provide sufficient power for the oil pump, and the operation time of about 10 seconds is needed for establishing proper oil lubrication pressure. During which the surfaces of the friction pairs inside the engine are in a semi-dry friction or dry friction state. Over the long term, wear of moving parts of the engine is accelerated, reducing the service life of the parts, and therefore it is necessary to increase the pre-lubrication device of the engine.
The existing pre-lubrication devices mainly have the following forms:
a starter drive type. The lubricating device is characterized in that an oil pump is additionally arranged at one end of a commutator of an engine starter armature shaft, and a control circuit is additionally arranged. Before starting, the starter drives the additional engine oil pump to work, and the engine oil in the oil pan is pressed into the main oil duct to provide lubricating oil for the friction pairs of various moving parts.
Driven by an independent motor. The structure and principle of the pre-lubricating device are different from those of a starter driving type, and the pre-lubricating device mainly differs from a starter driving type in that a power source is changed into a direct current motor, and a control circuit is also greatly different.
And (4) an energy storage type. The pre-lubricating device does not need to additionally arrange an oil pump and a motor, only needs to arrange an electric control type pressure engine oil accumulator on the main oil duct of the engine, stores oil when the engine normally runs, and releases pressure engine oil from the accumulator into the main oil duct to provide lubricating engine oil for each friction pair when the engine is started next time.
The starter driving type pre-lubricating device and the independent motor driving type pre-lubricating device have the disadvantages that an oil pump, a power source, a lubricating oil way and the like are required to be additionally arranged, the device is complex in structure, expensive in manufacturing cost and large in occupied space, the direct current motor can greatly depend on the power of a storage battery during working, and pre-lubricating can not be well completed when the power of the storage battery is insufficient in winter. The energy storage type engine has the disadvantages that a large oil storage device is needed, the occupied space is large, the oil storage amount is limited, and when the engine is not started successfully for the first time, the energy storage device cannot perform engine starting pre-lubrication for the second time due to the fact that the oil storage process is not performed; secondly, the energy storage type oil reservoir cannot store pressure for a long time, and when the vehicle is not used for a long time, the pressure engine oil needs to be decompressed, and in this case, the engine cannot be pre-lubricated for starting.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
The present invention has been made in view of the problems occurring in the conventional gear pump.
Therefore, the invention aims to provide an engine gear pump structure with a pre-lubrication function and a control method thereof, which can realize that a pneumatic motor driven by high-pressure gas is used for providing power for a lubrication system to start pre-lubrication, so that the abrasion among friction pairs can be reduced, and the service lives of an engine and parts thereof can be effectively prolonged.
To solve the above technical problem, according to an aspect of the present invention, the present invention provides the following technical solutions:
an engine gear pump structure with a pre-lubrication function and a control method thereof comprise a first pump body, a transmission gear, a first half-round key, a locking nut, a main gear shaft, a first bolt, a separation plate, a pump cover, a pneumatic motor shell, blades, a rotor, a second half-round key, a pinion shaft, a second bolt, a second pump body, an oil outlet, an oil inlet, a bolt hole, a first threaded hole, a second threaded hole, a spring, a metal ball, an air inlet, an air outlet, a main oil supply way, an auxiliary oil supply way, a high-pressure air tank, an ECU and an electromagnetic valve;
the transmission gear is fixed with the main gear shaft by a first semicircular key and a locking nut, and a cylindrical boss is arranged on the outer side of the first pump body;
the main gear shaft and the meshing gear thereof are arranged between the first pump body and the partition plate, and the auxiliary gear shaft and the meshing gear thereof are arranged between the partition plate and the pump cover to form a main oil supply path and an auxiliary oil supply path; the main oil supply path is used for pumping oil by driving a main gear shaft and a meshing gear thereof by an engine, and the auxiliary oil supply path is used for pumping oil by driving an auxiliary gear shaft and a meshing gear thereof by a pneumatic motor;
a one-way valve structure is additionally arranged at an oil outlet of the auxiliary oil supply path, and the one-way valve consists of a spring and a metal ball and is used for preventing the engine oil of the main oil supply path from flowing back to the auxiliary oil supply path;
the pneumatic motor is composed of a pneumatic motor shell, blades, a rotor, a second semicircular key, a pinion shaft, an air inlet and an air outlet, wherein the rotor is fixed by the second semicircular key and the pinion shaft, the blades are uniformly distributed in a groove in the pneumatic motor rotor, and the blades of the pneumatic motor are tightly propped against the inner wall of the pneumatic motor shell by centrifugal force;
the pneumatic motor is fixed on the first pump body of the oil pump by the second threaded holes of the three second bolts, the oil pump is fixed into a whole by the first threaded holes of the three first bolts, and the oil pump is fixed on the engine body by the four bolts through the bolt holes;
and high-pressure gas in the high-pressure gas tank flows through the electromagnetic valve and the air inlet of the pneumatic motor through the pipeline and is discharged from the exhaust port.
As a preferable aspect of the gear pump structure of an engine with a pre-lubrication function and the control method thereof according to the present invention, wherein: the three second bolts fix the pneumatic motor shell, the pump cover, the second pump body and the first pump body into a whole through second threaded holes, and the second threaded holes are only provided with threads on the first pump body; the pump cover, the second pump body and the first pump body are fixed into a whole by three first bolts through first threaded holes, and the first threaded holes are only provided with threads on the first pump body; the four bolts fix the oil pump fixed as a whole to the engine body through bolt holes.
As a preferable aspect of the gear pump structure of an engine with a pre-lubrication function and the control method thereof according to the present invention, wherein: the oil path relation of the main oil supply path and the auxiliary oil supply path is parallel connection, namely the main oil supply path and the auxiliary oil supply path are provided with the same oil outlet and oil inlet.
As a preferable aspect of the gear pump structure of an engine with a pre-lubrication function and the control method thereof according to the present invention, wherein: the difference between the diameter of the inner cavity of the one-way valve and the diameter of the metal ball is the diameter of the oil outlet, so that the circulation width of the pressure engine oil is unchanged when the one-way valve is opened, and the pressure fluctuation of the engine oil is reduced.
As a preferable aspect of the gear pump structure of an engine with a pre-lubrication function and the control method thereof according to the present invention, wherein: the method comprises the following steps:
when the vehicle is ready to start, a driver turns ON a vehicle key, the ECU controls the electromagnetic valve to be opened, the pneumatic motor drives the oil pump to rotate at a high speed, and engine oil in the oil pan is pumped into an engine oil channel through the auxiliary oil supply channel to perform engine starting pre-lubrication; after fifteen seconds, the electromagnetic valve is automatically closed, the pneumatic motor gradually stops working, the pre-lubrication process is finished, and the pressure engine oil in the oil duct and between the friction pairs can meet the requirement of starting the engine; when a driver rotates a key to START, the engine is started by a starting motor, a main gear shaft and a meshing gear thereof are driven by the engine to run, engine oil enters an engine oil passage through an oil outlet through a main oil supply passage, and the built-in check valve can prevent the engine oil from flowing back to an auxiliary oil supply passage which does not work, so that the engine oil pump continues to provide lubricating pressure for a lubricating system.
Compared with the prior art, the invention has the beneficial effects that: the power source used by the invention is a pneumatic motor which is a pneumatic actuator for converting the pressure of compressed gas into mechanical energy and generating rotary motion in pneumatic transmission. Compared with the electric motor, the energy source of the pneumatic motor is compressed air stored in a high-pressure air tank, the starting torque is large, the pneumatic motor can be started with load, and the work is stable and safe; the pneumatic motor driven by high-pressure gas is used for providing power for the lubricating system to start and pre-lubricate, so that the abrasion among friction pairs can be reduced, the service life of an engine and parts of the engine can be effectively prolonged, the one-way valve is arranged in the pump body of the oil pump and well combined with the pump cover and the flow distribution surface of the pump cover, the structure is compact, the size is small, the space utilization rate can be improved, the installation and the arrangement on a vehicle are convenient, an electromagnetic valve controlled by an ECU is used, the response is rapid, and the accuracy is high.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail with reference to the accompanying drawings and detailed embodiments, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise. Wherein:
FIG. 1 is a longitudinal cross-sectional view of an engine gear pump with pre-lubrication according to the present invention;
FIG. 2 is a schematic structural diagram of a section A-A at the pump body of the oil pump shown in FIG. 1;
FIG. 3 is a schematic structural diagram of a section B-B at the oil pump separation plate shown in FIG. 1;
FIG. 4 is a schematic structural diagram of a section C-C at the pump body of the oil pump shown in FIG. 1;
FIG. 5 is a schematic structural diagram of a D-D section of the air motor of the oil pump of FIG. 1;
FIG. 6 is a schematic structural diagram of a cross section E-E of a main oil supply passage, an auxiliary oil supply passage, an oil inlet and an oil outlet of the oil pump shown in FIG. 1;
fig. 7 is a schematic diagram of electrical connections of the high pressure gas tank, solenoid valve, ECU, pneumatic motor and its air inlet.
In the figure; the pump comprises a first pump body 1, a transmission gear 2, a first half key 3, a locknut 4, a main gear shaft 5, a first bolt 6, a partition plate 7, a pump cover 8, a pneumatic motor shell 9, a blade 10, a rotor 11, a second half key 12, a pinion shaft 13, a second bolt 14, a second pump body 15, an oil outlet 16, an oil inlet 17, a bolt hole 18, a first threaded hole 19, a second threaded hole 20, a spring 21, a metal ball 22, an air inlet 23, an air outlet 24, a main oil supply path 25, an auxiliary oil supply path 26, a high-pressure air tank 27, an ECU28 and an electromagnetic valve 29.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described herein, and it will be apparent to those of ordinary skill in the art that the present invention may be practiced without departing from the spirit and scope of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Next, the present invention will be described in detail with reference to the drawings, wherein for convenience of illustration, the cross-sectional view of the device structure is not enlarged partially according to the general scale, and the drawings are only examples, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
The invention provides the following technical scheme: an engine gear pump structure with a pre-lubrication function and a control method thereof comprise a first pump body 1, a transmission gear 2, a first half-round key 3, a locknut 4, a master gear shaft 5, a first bolt 6, a separation plate 7, a pump cover 8, a pneumatic motor shell 9, blades 10, a rotor 11, a second half-round key 12, a pinion shaft 13, a second bolt 14, a second pump body 15, an oil outlet 16, an oil inlet 17, a bolt hole 18, a first threaded hole 19, a second threaded hole 20, a spring 21, a metal ball 22, an air inlet 23, an air outlet 24, a main oil supply path 25, a secondary oil supply path 26, a high-pressure air tank 27, an ECU28 and an electromagnetic valve 29;
the transmission gear 2 is fixed with a main gear shaft 5 through a first semicircular key 3 and a locking nut 4, and a cylindrical boss is arranged on the outer side of the first pump body 1;
the main gear shaft 5 and the meshing gear thereof are arranged between the first pump body 1 and the partition plate 7, and the auxiliary gear shaft 13 and the meshing gear thereof are arranged between the partition plate 7 and the pump cover 8 to form a main oil supply path 25 and an auxiliary oil supply path 26; the main oil supply path 25 pumps oil by driving the main gear shaft 5 and the meshing gear thereof by the engine, and the auxiliary oil supply path 26 pumps oil by driving the auxiliary gear shaft 13 and the meshing gear thereof by the pneumatic motor;
a one-way valve structure is additionally arranged at the oil outlet of the auxiliary oil supply path 26, and the one-way valve consists of a spring 21 and a metal ball 22 and prevents the engine oil of the main oil supply path 25 from flowing back to the auxiliary oil supply path 26;
the pneumatic motor is composed of a pneumatic motor shell 9, blades 10, a rotor 11, a second semicircular key 12, an auxiliary gear shaft 13, an air inlet 23 and an air outlet 24, wherein the rotor 11 is fixed by the second semicircular key 12 and the auxiliary gear shaft 13, the blades 10 are uniformly distributed in a groove in the pneumatic motor rotor 11, and the blades 10 of the pneumatic motor are tightly propped against the inner wall of the pneumatic motor shell 9 by centrifugal force;
the pneumatic motor is fixed on the first pump body 1 of the oil pump by three second bolts 14 through a second threaded hole 20, the oil pump is fixed into a whole by three first bolts 6 through a first threaded hole 19, and the oil pump is fixed on an engine body by four bolts through bolt holes 18;
the high-pressure gas in the high-pressure gas tank 27 is discharged from the exhaust port 24 after flowing through the solenoid valve 29 and the air motor inlet 23 via a pipe.
Specifically, the three second bolts 14 fix the pneumatic motor shell 9, the pump cover 8, the second pump body 15 and the first pump body 1 into a whole through second threaded holes 20, and the second threaded holes 20 are only threaded on the first pump body 1; the pump cover 8, the second pump body 15 and the first pump body 1 are fixed into a whole by three first bolts 6 through first threaded holes 19, and the first threaded holes 19 are only threaded on the first pump body 1; four bolts fix the integrally fixed oil pump to the engine body through the bolt holes 18.
Specifically, the main oil supply path 25 and the auxiliary oil supply path 26 are connected in parallel, that is, have the same oil outlet 16 and oil inlet 17.
Specifically, the difference between the diameter of the inner cavity of the one-way valve and the diameter of the metal ball is the diameter of the oil outlet 16, so that the flowing width of the pressure engine oil is unchanged when the one-way valve is opened, and the pressure fluctuation of the engine oil is reduced.
Specifically, the method comprises the following steps:
when the vehicle is ready to start, a driver turns ON a vehicle key, the ECU28 controls the electromagnetic valve 29 to be opened, the pneumatic motor drives the oil pump to rotate at a high speed, and the oil in the oil pan is pumped into an engine oil channel through the auxiliary oil supply channel 26 to pre-lubricate the engine during starting; fifteen seconds later, the electromagnetic valve 29 is automatically closed, the pneumatic motor gradually stops working, the pre-lubrication process is finished, and the pressure engine oil in the oil passage and between the friction pairs can meet the requirement of starting the engine; when the driver rotates the key to START, the engine is started by the starter motor, the main gear shaft 5 and the meshing gear thereof are driven by the engine to run, the engine oil enters the engine oil passage through the oil outlet 16 through the main oil supply passage 25, the built-in check valve can prevent the engine oil from flowing back to the auxiliary oil supply passage 26 which does not work, and the engine oil pump further provides lubricating pressure for the lubricating system.
While the invention has been described above with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the various features of the disclosed embodiments of the invention may be used in any combination, provided that no structural conflict exists, and the combinations are not exhaustively described in this specification merely for the sake of brevity and resource conservation. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims (5)

1. The utility model provides an engine gear pump structure with lubricate function in advance which characterized in that: the hydraulic pump comprises a first pump body (1), a transmission gear (2), a first half-round key (3), a locking nut (4), a main gear shaft (5), a first bolt (6), a partition plate (7), a pump cover (8), a pneumatic motor shell (9), blades (10), a rotor (11), a second half-round key (12), a pinion shaft (13), a second bolt (14), a second pump body (15), an oil outlet (16), an oil inlet (17), a bolt hole (18), a first threaded hole (19), a second threaded hole (20), a spring (21), a metal ball (22), an air inlet (23), an air outlet (24), a main oil supply way (25), an auxiliary oil supply way (26), a high-pressure air tank (27), an ECU (28) and an electromagnetic valve (29);
the transmission gear (2) is fixed with a main gear shaft (5) through a first semicircular key (3) and a locking nut (4), and a cylindrical boss is arranged on the outer side of the first pump body (1);
the main gear shaft (5) and the meshing gear thereof are arranged between the first pump body (1) and the partition plate (7), and the auxiliary gear shaft (13) and the meshing gear thereof are arranged between the partition plate (7) and the pump cover (8) to form a main oil supply path (25) and an auxiliary oil supply path (26); the main oil supply path (25) pumps oil by driving the main gear shaft (5) and the meshing gear thereof by the engine, and the auxiliary oil supply path (26) pumps oil by driving the auxiliary gear shaft (13) and the meshing gear thereof by the pneumatic motor;
a one-way valve structure is additionally arranged at an oil outlet of the auxiliary oil supply path (26), and the one-way valve consists of a spring (21) and a metal ball (22) and prevents the engine oil of the main oil supply path (25) from flowing back to the auxiliary oil supply path (26);
the pneumatic motor is composed of a pneumatic motor shell (9), blades (10), a rotor (11), a second half-round key (12), an auxiliary gear shaft (13), an air inlet (23) and an air outlet (24), the rotor (11) is fixed by the second half-round key (12) and the auxiliary gear shaft (13), the blades (10) are uniformly distributed in a groove in the pneumatic motor rotor (11), and the blades (10) of the pneumatic motor are tightly propped against the inner wall of the pneumatic motor shell (9) through centrifugal force;
the pneumatic motor is fixed on the first pump body (1) of the oil pump by three second bolts (14) through second threaded holes (20), the oil pump is fixed into a whole by three first bolts (6) through first threaded holes (19), and the oil pump is fixed on an engine body by four bolts through bolt holes (18);
high-pressure gas in the high-pressure gas tank (27) flows through the electromagnetic valve (29) and the air inlet (23) of the air motor through pipelines and then is discharged from the exhaust port (24).
2. An engine gear pump structure with pre-lubrication function as claimed in claim 1, wherein: the three second bolts (14) fix the pneumatic motor shell (9), the pump cover (8), the second pump body (15) and the first pump body (1) into a whole through second threaded holes (20), and the second threaded holes (20) are only provided with threads on the first pump body (1); the pump cover (8), the second pump body (15) and the first pump body (1) are fixed into a whole by three first bolts (6) through first threaded holes (19), and the first threaded holes (19) are only provided with threads on the first pump body (1); the four bolts fix the integrally fixed oil pump to an engine body through bolt holes (18).
3. An engine gear pump structure with pre-lubrication function as claimed in claim 1, wherein: the oil path relation of the main oil supply path (25) and the auxiliary oil supply path (26) is parallel connection, namely the main oil supply path and the auxiliary oil supply path are provided with the same oil outlet (16) and the same oil inlet (17).
4. An engine gear pump structure with pre-lubrication function as claimed in claim 1, wherein: the difference between the diameter of the inner cavity of the one-way valve and the diameter of the metal ball is the diameter of the oil outlet (16), so that the flowing width of the pressure engine oil is unchanged when the one-way valve is opened, and the pressure fluctuation of the engine oil is reduced.
5. The control method of the gear pump structure of the engine with the pre-lubrication function according to claim 1, wherein: the method comprises the following steps:
when the vehicle is ready to start, a driver turns ON a vehicle key, the ECU (28) controls the electromagnetic valve (29) to be opened, the pneumatic motor drives the oil pump to rotate at a high speed, and the oil in the oil pan is pumped into an oil passage of the engine through the auxiliary oil supply passage (26) to pre-lubricate the start of the engine; fifteen seconds later, the electromagnetic valve (29) is automatically closed, the pneumatic motor gradually stops working, the pre-lubrication process is finished, and the pressure engine oil in the oil passage and between the friction pairs can meet the requirement of starting the engine; when a driver rotates a key to START, the engine is started by a starting motor, a main gear shaft (5) and a meshing gear thereof are driven by the engine to run, engine oil enters an engine oil passage through an oil outlet (16) through a main oil supply passage (25), a built-in one-way valve can prevent the engine oil from flowing back to an auxiliary oil supply passage (26) which does not work, and the engine oil pump further provides lubricating pressure for a lubricating system.
CN202110451016.4A 2021-04-26 2021-04-26 Engine gear pump structure with pre-lubrication function and control method thereof Pending CN113006897A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115370950A (en) * 2022-08-19 2022-11-22 西南石油大学 Self-generating rotor oil transfer pump active oil supply lubrication bearing system

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Publication number Priority date Publication date Assignee Title
DE1154974B (en) * 1960-09-08 1963-09-26 Daimler Benz Ag Device for pressure circulation lubrication for internal combustion engines
CN110985372A (en) * 2019-12-25 2020-04-10 吉林大学 Oil pump and application thereof in engine lubricating system
CN111980916A (en) * 2020-09-04 2020-11-24 吉林大学 Auxiliary pneumatic motor driving single-pair gear type oil pump
CN214577266U (en) * 2021-04-26 2021-11-02 吉林大学 Engine gear pump with pre-lubrication function

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1154974B (en) * 1960-09-08 1963-09-26 Daimler Benz Ag Device for pressure circulation lubrication for internal combustion engines
CN110985372A (en) * 2019-12-25 2020-04-10 吉林大学 Oil pump and application thereof in engine lubricating system
CN111980916A (en) * 2020-09-04 2020-11-24 吉林大学 Auxiliary pneumatic motor driving single-pair gear type oil pump
CN214577266U (en) * 2021-04-26 2021-11-02 吉林大学 Engine gear pump with pre-lubrication function

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115370950A (en) * 2022-08-19 2022-11-22 西南石油大学 Self-generating rotor oil transfer pump active oil supply lubrication bearing system
CN115370950B (en) * 2022-08-19 2024-01-16 西南石油大学 Active oil supply lubrication bearing system of self-generating rotor oil transfer pump

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