CN215057637U

CN215057637U - Pre-lubrication type engine oil pump

Info

Publication number: CN215057637U
Application number: CN202120819510.7U
Authority: CN
Inventors: 朱昌吉; 张豪; 高腾麟; 李亚军; 李岩
Original assignee: Jilin University
Current assignee: Jilin University
Priority date: 2021-04-21
Filing date: 2021-04-21
Publication date: 2021-12-07
Anticipated expiration: 2031-04-21

Abstract

The utility model belongs to the technical field of pre-lubrication of automobile engines, in particular to a pre-lubrication type engine oil pump, which comprises a pump cover, wherein the outer side of the pump cover is a cylindrical boss, the inner side of the pump cover is a flow distribution surface, three bolt holes and three threaded holes are distributed on the outer side of the pump cover, and the threaded holes are used for connecting the whole engine oil pump into a whole; the outer end of the main shaft is provided with a transmission gear, and the inner end of the main shaft is connected with the inner rotor through a first cylindrical pin; inner rotor and external rotor internal gearing constitute a cycloid impeller pump A with a pump cover, main shaft, a pump body, division board, a cylindric lock, its is rational in infrastructure, compares with traditional oil pump, the utility model discloses can drive the oil pump operation through pneumatic motor before the engine starts, accomplish engine lubrication system's lubrication in advance, reduce the friction and wear of engine friction pair when starting by a wide margin, can prolong the overhaul period and the life-span of engine, save cost and space.

Description

Pre-lubrication type engine oil pump

Technical Field

The utility model relates to an automobile engine prelubricates technical field, specifically is a prelubricated formula engine oil pump.

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.

The utility model uses a pneumatic motor as the power source. A pneumatic motor is a pneumatic actuator in a pneumatic transmission that converts the pressure of compressed gas into mechanical energy and produces rotational motion. If the pneumatic motor is considered to be used for providing power for the lubricating system before the engine is started to carry out starting pre-lubrication, the abrasion among all friction pairs can be reduced, and the service life of the engine and parts thereof can be effectively prolonged.

SUMMERY OF THE UTILITY MODEL

This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract of the specification and the title of the application to avoid obscuring the purpose of this section, the abstract of the specification and the title of the application, and such simplifications or omissions are not intended to limit the scope of the invention.

In view of the problems existing in the prior oil pump, the utility model discloses.

Therefore, the utility model aims at providing a pre-lubrication formula engine oil pump can realize reducing the wearing and tearing between each friction pair, the effectual life-span that improves engine and spare part thereof.

For solving the technical problem, according to the utility model discloses an aspect, the utility model provides a following technical scheme:

the utility model provides a pre-lubricated formula engine oil pump, its includes pump cover, main shaft, the pump body of a number, division board, the pump body of a number two, the pump cover of a number two, semicircle key, countershaft, No. three pump covers, motor housing, the distribution surface of a number one, bolt hole, screw hole, oil duct, external rotor, inner rotor, cylindric lock, external rotor, inner rotor, the cylindric lock of a number two, the distribution surface of a number two, gas vent, blade, pneumatic motor rotor, air inlet, check valve:

wherein

The outer side of the first pump cover is provided with a cylindrical boss, the inner side of the first pump cover is provided with a first flow distribution surface, and three bolt holes and three threaded holes are distributed on the first flow distribution surface and used for connecting the whole oil pump into a whole; the outer end of the main shaft is provided with a transmission gear, and the inner end of the main shaft is connected with the inner rotor through a first cylindrical pin; the inner rotor is internally meshed with the outer rotor and forms a cycloid rotor pump A with the first pump cover, the main shaft, the first pump body, the partition plate and the first cylindrical pin;

the inner side of the second pump cover is a second flow distribution surface, and the outer side of the second pump cover is an air motor; the outer end of the auxiliary shaft is connected with a pneumatic motor rotor through a semicircular key, and the inner end of the auxiliary shaft is connected with the inner rotor through a second cylindrical pin; the inner rotor is internally meshed with the outer rotor and forms a cycloid rotor pump B with the partition plate, the second pump body, the second pump cover, the auxiliary shaft and the second cylindrical pin;

the two cycloid rotor pumps are provided with the same oil passages, a one-way valve is arranged in the oil passage of the first pump body, the pneumatic motor is composed of a second pump cover, a semicircular key, an auxiliary shaft, a third pump cover, a motor shell, blades, a pneumatic motor rotor, an air inlet and an air outlet, the blades are uniformly distributed in a groove in the pneumatic motor rotor, and the blades of the pneumatic motor are tightly abutted to the inner wall of the motor shell through centrifugal force.

As a preferred scheme of pre-lubricated formula engine oil pump, wherein: the first pump cover, the first pump body, the partition plate, the second pump body, the second pump cover, the third pump cover and the motor shell are fixed into a whole by three bolts through threaded holes, and the threaded holes are only provided with threads on the first pump cover; the oil pump fixed integrally is fixed to the engine body by three bolts through bolt holes.

As a preferred scheme of pre-lubricated formula engine oil pump, wherein: the cylindrical boss at the outer end of the first pump cover has the function of positioning the oil pump and the engine body.

As a preferred scheme of pre-lubricated formula engine oil pump, wherein: and the transmission gear at the outer end of the main shaft is used for power transmission between the oil pump and the engine.

As a preferred scheme of pre-lubricated formula engine oil pump, wherein: the oil passages between the cycloid rotor pumps A, B are connected in parallel, namely, the oil passages are the same; in order to prevent the cycloid impeller pump a from operating and the impeller pump B from not operating, the pressure oil flows back from the impeller pump a to the impeller pump B and affects the oil intake of the impeller pump a, a check valve needs to be provided.

As a preferred scheme of pre-lubricated formula engine oil pump, wherein: the difference between the diameter of the inner cavity of the one-way valve and the diameter of the ball body is the diameter of the oil port opening, and the purpose is to ensure that the circulation width of pressure engine oil is unchanged when the one-way valve is opened, and reduce the pressure fluctuation of the engine oil.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the power source used in the pre-lubrication stage does not depend on the electric power of a vehicle storage battery, and the electric quantity of the storage battery in winter is not influenced;

2. the used pneumatic motor has stable work, the cost is lower than that of the motor, and the pneumatic motor can be started with load;

3. the check valve is arranged in the pump body of the oil pump, is well combined with the pump cover and the flow distribution surface thereof, has compact structure and smaller volume, can improve the space utilization rate, and is convenient to install and arrange on a vehicle.

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 for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor. Wherein:

FIG. 1 is a cross-sectional view of an integrated pre-lubricated engine oil pump according to the present invention;

FIG. 2 is a schematic structural view of a section A-A and a section H-H of the pump cover of the oil pump shown in FIG. 1;

FIG. 3 is a schematic structural diagram of a section B-B of the pump body of the oil pump shown in FIG. 1 and a section I-I of the check valve and the oil passage;

FIG. 4 is a schematic structural diagram of a section C-C of the oil pump partition plate shown in FIG. 1;

FIG. 5 is a schematic structural view of a D-D section of the pump body of the oil pump shown in FIG. 1;

FIG. 6 is a schematic structural diagram of an E-E section and an J-J section of the oil pump cover of the oil pump shown in FIG. 1;

FIG. 7 is a schematic structural diagram of a section F-F of the pneumatic motor of the oil pump of FIG. 1;

FIG. 8 is a schematic structural diagram of a section G-G of the oil pump cover shown in FIG. 1.

In the figure; the pump comprises a first pump cover 1, a main shaft 2, a first pump body 3, a partition plate 4, a second pump body 5, a second pump cover 6, a semicircular key 7, an auxiliary shaft 8, a third pump cover 9, a motor shell 10, a first flow distribution surface 11, bolt holes 12, threaded holes 13, an oil passage 14, a first outer rotor 15, a first inner rotor 16, a first cylindrical pin 17, a second outer rotor 18, a second inner rotor 19, a second cylindrical pin 20, a second flow distribution surface 21, an exhaust port 22, blades 23, a pneumatic motor rotor 24, an air inlet 25 and a one-way valve 26.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings.

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 implemented in other ways than those specifically described herein, and one skilled in the art may similarly generalize the present invention without departing from the spirit 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 schematic drawings, and in the detailed description of the embodiments of the present invention, for convenience of explanation, the sectional view showing the device structure will not be enlarged partially according to the general scale, and the schematic drawings are only examples, and 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 clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

The utility model provides a following technical scheme: the utility model provides a pre-lubricated formula engine oil pump, includes pump cover 1, main shaft 2, the pump body 3, division board 4, the pump body 5 of No. two, No. two pump covers 6, the semicircle key 7, countershaft 8, No. three pump covers 9, motor housing 10, No. one join in marriage a class face 11, bolt hole 12, screw hole 13, oil duct 14, No. one outer rotor 15, No. one inner rotor 16, a cylindric lock 17, No. two outer rotors 18, No. two inner rotors 19, No. two cylindric locks 20, No. two join in marriage class faces 21, gas vent 22, blade 23, pneumatic motor rotor 24, air inlet 25, check valve 26:

wherein

The outer side of the first pump cover 1 is provided with a cylindrical boss, the inner side of the first pump cover is provided with a first flow distribution surface 11, three bolt holes 12 and three threaded holes 13 are distributed, the cylindrical boss is used for positioning an oil pump and an engine body, the threaded holes 13 are used for connecting the whole oil pump into a whole, and the bolt holes 12 are used for fixing the oil pump on the engine body; the outer end of the main shaft 2 is provided with a transmission gear for power transmission between an oil pump and an engine, and the inner end of the main shaft is connected with a first inner rotor 16 through a first cylindrical pin 17; the first inner rotor 16 is internally meshed with the first outer rotor 15, and forms a cycloid rotor pump A with the first pump cover 1, the main shaft 2, the first pump body 3, the partition plate 4 and the first cylindrical pin 17;

the inner side of the second pump cover 6 is a second flow distribution surface 21, and the outer side is a pneumatic motor; the outer end of the auxiliary shaft 8 is connected with a pneumatic motor rotor 24 through a semicircular key 7, and the inner end of the auxiliary shaft is connected with a second inner rotor 19 through a second cylindrical pin 20; the second inner rotor 19 is internally meshed with the second outer rotor 18 to form a cycloid rotor pump B together with the partition plate 4, the second pump body 5, the second pump cover 6, the auxiliary shaft 8 and the second cylindrical pin 20;

the two cycloid rotor pumps are provided with the same oil passage 14, a one-way valve 26 is arranged in the oil passage 14 of the first pump body 3 and consists of a steel ball, a spring and a spring base to prevent backflow of engine oil, the pneumatic motor consists of a second pump cover 6, a semicircular key 7, an auxiliary shaft 8, a third pump cover 9, a motor shell 10, blades 23, a pneumatic motor rotor 24, an air inlet 25 and an air outlet 22, the blades 23 are uniformly distributed in grooves in the pneumatic motor rotor 24, and the blades 23 of the pneumatic motor are tightly abutted to the inner wall of the motor shell 10 by centrifugal force.

Specifically, a first pump cover 1, a first pump body 3, a partition plate 4, a second pump body 5, a second pump cover 6, a third pump cover 9 and a motor shell 10 are fixed into a whole by three bolts through threaded holes 13, and the threaded holes 13 are only provided with threads on the first pump cover 1; the oil pump fixed as one body is fixed to the engine body by three bolts through the bolt holes 12.

Specifically, the cylindrical boss at the outer end of the first pump cover 1 has the function of positioning the oil pump and the engine body.

Specifically, the transmission gear at the outer end of the main shaft 2 is used for power transmission between the oil pump and the engine.

Specifically, the oil paths between the gerotor pumps A, B are in parallel, i.e., have the same oil passage 14; in order to prevent the pressure oil from flowing back from the gerotor pump a to the gerotor pump B when the gerotor pump a is operating but the gerotor pump B is not operating, and to affect the oil intake of the gerotor pump a, a check valve 26 needs to be provided.

Specifically, the difference between the diameter of the inner cavity of the check valve 26 and the diameter of the ball is the diameter of the oil port opening, so as to ensure that the flowing width of the pressure engine oil is not changed when the check valve is opened, and reduce the pressure fluctuation of the engine oil

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, as long as there is no structural conflict, the various features of the disclosed embodiments of the present invention can be used in any combination with each other, and the non-exhaustive description of these combinations in this specification is 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

1. A pre-lubricated engine oil pump is characterized in that: the pump comprises a first pump cover (1), a main shaft (2), a first pump body (3), a partition plate (4), a second pump body (5), a second pump cover (6), a semicircular key (7), an auxiliary shaft (8), a third pump cover (9), a motor shell (10), a first distributing surface (11), a bolt hole (12), a threaded hole (13), an oil duct (14), a first outer rotor (15), a first inner rotor (16), a first cylindrical pin (17), a second outer rotor (18), a second inner rotor (19), a second cylindrical pin (20), a second distributing surface (21), an exhaust port (22), a blade (23), a pneumatic motor rotor (24), an air inlet (25) and a one-way valve (26):

wherein

The outer side of the first pump cover (1) is provided with a cylindrical boss, the inner side of the first pump cover is provided with a first flow distribution surface (11), three bolt holes (12) and three threaded holes (13) are distributed, and the threaded holes (13) are used for connecting the whole oil pump into a whole; the outer end of the main shaft (2) is provided with a transmission gear, and the inner end of the main shaft is connected with the first inner rotor (16) through a first cylindrical pin (17); the first inner rotor (16) is internally meshed with the first outer rotor (15) to form a cycloid rotor pump A together with the first pump cover (1), the main shaft (2), the first pump body (3), the partition plate (4) and the first cylindrical pin (17);

the inner side of the second pump cover (6) is a second flow distribution surface (21), and the outer side is an air motor; the outer end of the auxiliary shaft (8) is connected with a pneumatic motor rotor (24) through a semicircular key (7), and the inner end of the auxiliary shaft is connected with a second inner rotor (19) through a second cylindrical pin (20); the second inner rotor (19) is internally meshed with the second outer rotor (18) and forms a cycloid rotor pump B with the partition plate (4), the second pump body (5), the second pump cover (6), the auxiliary shaft (8) and the second cylindrical pin (20);

the two cycloid rotor pumps are provided with the same oil passage (14), a one-way valve (26) is arranged in the oil passage (14) of the first pump body (3), the pneumatic motor is composed of a second pump cover (6), a semicircular key (7), an auxiliary shaft (8), a third pump cover (9), a motor shell (10), blades (23), a pneumatic motor rotor (24), an air inlet (25) and an air outlet (22), the blades (23) are uniformly distributed in grooves in the pneumatic motor rotor (24), and centrifugal force enables the pneumatic motor blades (23) to tightly abut against the inner wall of the motor shell (10).

2. The pre-lubricated engine oil pump according to claim 1, wherein: the first pump cover (1), the first pump body (3), the partition plate (4), the second pump body (5), the second pump cover (6), the third pump cover (9) and the motor shell (10) are fixed into a whole by three bolts through threaded holes (13), and the threaded holes (13) are only provided with threads on the first pump cover (1); the oil pump fixed integrally is fixed to an engine body by three bolts through bolt holes (12).

3. The pre-lubricated engine oil pump according to claim 1, wherein: the cylindrical boss at the outer end of the first pump cover (1) has the function of positioning the oil pump and the engine body.

4. The pre-lubricated engine oil pump according to claim 1, wherein: and a transmission gear at the outer end of the main shaft (2) is used for power transmission between the oil pump and the engine.

5. The pre-lubricated engine oil pump according to claim 1, wherein: the oil passages between the cycloid rotor pumps A, B are in parallel connection, namely, the cycloid rotor pumps have the same oil passage (14); in order to prevent the pressure oil from flowing back to the rotor pump B from the rotor pump A when the cycloid rotor pump A is operated and the rotor pump B is not operated, and influence the oil inlet of the rotor pump A, a check valve (26) is needed.

6. The pre-lubricated engine oil pump according to claim 1, wherein: the difference between the diameter of the inner cavity of the one-way valve (26) and the diameter of the ball body is the diameter of the oil port opening, 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.