CN117605681A - High-integration electronic oil pump - Google Patents

High-integration electronic oil pump Download PDF

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Publication number
CN117605681A
CN117605681A CN202311608228.4A CN202311608228A CN117605681A CN 117605681 A CN117605681 A CN 117605681A CN 202311608228 A CN202311608228 A CN 202311608228A CN 117605681 A CN117605681 A CN 117605681A
Authority
CN
China
Prior art keywords
pump
rotor
motor
oil
pin
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
CN202311608228.4A
Other languages
Chinese (zh)
Inventor
王利平
张国俊
王锐楠
华和照
赵毅
魏义
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.)
Hangzhou Xiangxian Technology Co ltd
Original Assignee
Hangzhou Xiangxian Technology 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 Hangzhou Xiangxian Technology Co ltd filed Critical Hangzhou Xiangxian Technology Co ltd
Priority to CN202311608228.4A priority Critical patent/CN117605681A/en
Publication of CN117605681A publication Critical patent/CN117605681A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • 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
    • 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
    • F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • F04C15/008—Prime movers
    • 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
    • F04C15/0096—Heating; Cooling
    • 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
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)

Abstract

The invention discloses a high-integration electronic oil pump, which comprises a pump shell, wherein a motor and a rotor pump are arranged in the pump shell, the rotor pump is arranged in the motor, a ball bearing is arranged between the motor and the rotor pump, the motor consists of a stator component and a motor rotor, the rotor pump consists of an inner gear, an outer gear and a pin, the inner side of the stator component is provided with a hollow motor rotor, the motor rotor is internally provided with the outer gear, the outer gear is integrated in the motor rotor and is pressed into a whole, the volume of a system is greatly reduced, the weight of the system is reduced, a shaft sleeve is arranged at the center of the motor rotor, the inner side of the shaft sleeve is provided with the pin, the outer side of the shaft sleeve is provided with the inner gear, the inner gear and the pin are respectively pressed with the shaft sleeve, and the inner gear is meshed with the outer gear. The high-integration electronic oil pump has reasonable structural design, high integration level, small volume, small weight and good cooling effect on heating elements.

Description

High-integration electronic oil pump
Technical Field
The invention relates to the technical field of electronic oil pumps of new energy automobiles, in particular to a high-integration electronic oil pump.
Background
Along with the rapid development of automobile electrification and new energy vehicles, the integrated electronic oil pump is increasingly applied according to the characteristics of high efficiency, energy conservation, flexible and various control and the like, and mainly comprises three parts: rotor pump, motor, controller etc.
Most of the current electronic oil pumps have large volume, large occupied space and high manufacturing cost; most of bearings between the motor and the rotor pump are arranged on the bearing bracket, so that the electronic oil pump is higher; most pump shells and the rotor pump are provided with cavities, and the end face of the rotor pump has larger friction, so that the loss of the rotor pump is large; in order to prevent the stator of the driving motor from being damaged due to overhigh temperature of the stator of the driving motor, the oil in the gearbox is required to cool the stator of the driving motor, but most of lubricating oil flows through the path length of the stator at present, so that the cooling effect is affected.
The invention aims to provide a high-integration electronic oil pump which has reasonable structural design, small volume, good cooling effect and low manufacturing cost.
Disclosure of Invention
In view of the problems existing in the prior art, the invention aims to provide a high-integration electronic oil pump which is small in size, short in time for cooling a stator, small in friction of the end face of a rotor pump and capable of effectively improving the efficiency of an electronic oil pump system.
The technical scheme of the invention is as follows:
the utility model provides a high integration electronic oil pump, includes the pump case, be equipped with motor and rotor pump in the pump case, the rotor pump is installed in inside the motor, wherein is equipped with ball bearing between motor and the rotor pump, and the motor comprises stator module and motor rotor, and the rotor pump comprises internal gear, external gear and pin, hollow motor rotor is installed to the stator module inboard, the inside external gear that is equipped with of motor rotor for the external gear integration is in motor rotor and pressfitting is as an organic whole, very big reduction the volume of system, alleviateed system weight, the axle sleeve is installed at motor rotor center, the axle sleeve inboard is equipped with the pin, the axle sleeve outside is equipped with the internal gear, internal gear and pin form with the axle sleeve pressfitting respectively, wherein internal gear and external gear meshing.
Further, the ball bearing is arranged between the motor rotor and the external gear, so that the ball bearing is arranged at the end part of the rotor pump, a cavity is not formed between the motor and the rotor pump, the height of the electronic oil pump is reduced, the weight of the rotor pump is greatly reduced, and the size of the rotor pump is greatly reduced.
Further, the ball bearing and the pump shell are processed by adopting the same mechanical jig, so that the gap uniformity of the stator and the rotor of the motor is ensured.
Furthermore, the thermal expansion coefficients of the stator of the motor and the pump body of the rotor pump are consistent, so that the influence of temperature on the gap of the oil pump is greatly reduced.
Further, an oil inlet and an oil outlet are arranged on the pump shell.
Further, the motor rotor and the external gear drive the internal gear to rotate around the shaft sleeve to pressurize the cooling oil flowing in from the oil inlet, so that one path of pressurized cooling oil flows to the stator assembly through the pin, the stator assembly is cooled, and the cooling oil subjected to heat exchange flows back to the low-pressure area; wherein the pressurized other path of cooling oil is directly discharged from the oil outlet through the high-pressure area.
Further, a flow passage for cooling oil to pass through is arranged in the pin.
Compared with the prior art, the invention has the following beneficial effects:
1) By adopting the technical scheme, the external gear is arranged in the motor rotor, so that the external gear is integrated in the motor rotor and is pressed into a whole, on one hand, the volume of the system is greatly reduced, the weight of the system is reduced, and the materials and the production cost of the system are obviously reduced; on the other hand, the friction of the cavity of the rotor pump is effectively reduced, and the system efficiency is improved;
2) According to the invention, the ball bearing is arranged between the motor rotor and the external gear, and the ball bearing supports the motor and the external gear to rotate, so that the ball bearing is arranged at the end part of the rotor pump, no cavity is arranged between the motor and the rotor pump, the height of the electronic oil pump is reduced, the weight of the rotor pump is greatly reduced, and the volume of the rotor pump is reduced;
3) Compared with the traditional electronic oil pump motor, which is pressed into the ball bearing bracket and then pressed into the ball bearing and the pump gear, the invention does not provide the ball bearing bracket, on one hand, the whole height of the electronic oil pump is shortened, the path of the pressurized cooling oil flowing to the stator assembly is short, the time is less, and the cooling effect is better; on the other hand, the accumulated installation errors are avoided, and the hidden danger of air gap eccentricity is avoided;
4) According to the rotor pump, the external gear, the motor rotor and the ball bearing are directly arranged, so that the end face clearance of the rotor pump is directly controlled, the external gear drives the shell to synchronously rotate, the friction of the end face of the pump is greatly reduced, and the system efficiency is effectively improved;
5) Because the external gear is integrated in the motor rotor, the thermal expansion coefficients of the motor stator and the pump body are consistent, the influence of temperature on the gap of the oil pump is greatly reduced, the gap of the end face of the pump is accurately ensured, and the influence of temperature on the flow efficiency of the system is effectively reduced or avoided;
6) The ball bearing and the pump shell are processed by adopting the same mechanical jig, so that the ball bearing and the pump shell have very precise coaxiality and concentricity, and the air gap eccentricity can be precisely controlled;
7) According to the invention, the precise air gap control of the outer diameter of the ball bearing and the inner diameter of the pump shell is realized, the ball bearing without a bearing bracket directly controls the end face gap of the pump, and the hidden danger of air gap eccentricity when the ball bearing is connected with the pump gear is effectively reduced and eliminated;
8) According to the invention, the motor rotor and the external gear drive the internal gear to rotate around the shaft sleeve so as to pressurize the cooling oil flowing in from the oil inlet, so that one path of pressurized cooling oil flows to the stator assembly through the pin, the stator assembly is cooled, and the temperature of the heating element is effectively reduced;
9) According to the invention, the pin is in static fixed design, the shaft sleeve is directly pressed on the pin, the internal gear rotates under the drive of the external gear and rotates relative to the shaft sleeve, the friction is reduced by mutual lubrication, the loss of a pump system is reduced, and the rotation stability of the pump is effectively improved;
10 Compared with the traditional electronic oil pump, the time for the pressurized cooling oil to flow to the stator assembly is short, and the cooling effect is better;
11 The high-integration electronic oil pump has reasonable structural design, high integration level, small volume, small weight and good cooling effect on heating elements.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a highly integrated electronic oil pump of the present invention;
fig. 2 is a cross-sectional view of the highly integrated electronic oil pump of the present invention.
In the figure: 1. a pump housing; 101. an oil inlet; 102. an oil outlet; 2. a motor rotor; 3. an external gear; 4. a shaft sleeve; 5. a pin; 6. an internal gear; 7. a ball bearing; 8. a stator; 9. a stator winding; 10. radial magnetic steel; 11. a hub; 12. a controller; 13. a heat insulating sealing plate; 14. and (3) a filter screen.
Detailed Description
The invention will be further described with reference to the accompanying drawings, but the scope of protection of the invention is not limited to the described scope.
As shown in fig. 1, a high-integration electronic oil pump comprises a pump shell 1, wherein an oil inlet 101 is arranged at the bottom of the pump shell 1, an oil outlet 102 of the high-integration electronic oil pump is arranged at the side part of the pump shell 1, and a filter screen 14 is arranged at the oil inlet 101 to filter lubricating oil.
In this embodiment the pump housing 1 is an aluminium housing.
The inside of the pump shell 1 is provided with a motor and a rotor pump, the rotor pump is arranged in the motor, wherein a ball bearing 7 is arranged between the motor and the rotor pump, so that the ball bearing is arranged at the end part of the rotor pump, the motor is composed of a stator assembly and a motor rotor 2, and the rotor pump is composed of an inner gear 6, an outer gear 3 and a pin 5.
As shown in fig. 2, the motor rotor 2 is installed on the inner side of the stator assembly, the external gear 3 is arranged in the motor rotor 2, the external gear 3 is integrated in the motor rotor 2 and is pressed into a whole, the shaft sleeve 4 is installed at the center of the motor rotor 2, the pin 5 is arranged on the inner side of the shaft sleeve 4, the internal gear 6 is arranged on the outer side of the shaft sleeve 4, the internal gear 6 and the pin 5 are respectively pressed into a whole with the shaft sleeve 4, and the internal gear 6 is meshed with the external gear 3.
The external gear is integrated in the motor rotor 2 and is pressed into a whole, so that on one hand, the volume of the system is greatly reduced, the weight of the system is reduced, and the material and production cost of the system are obviously reduced; on the other hand, the friction of the rotor pump cavity is effectively reduced, and the system efficiency is improved.
According to the invention, the ball bearing 7 is arranged between the motor rotor 2 and the external gear 3, the ball bearing 7 supports the motor rotor 2, the rotation of the external gear 3 in the rotor pump is ensured, and the ball bearing 7 is arranged at the end part of the rotor pump, so that no cavity is arranged between the motor and the rotor pump, the height of the electronic oil pump is reduced, the weight of the rotor pump is greatly reduced, and the volume of the rotor pump is reduced.
Compared with the traditional electronic oil pump motor, which is pressed into the ball bearing bracket and then pressed into the ball bearing and the pump gear, the invention does not provide the ball bearing bracket, on one hand, the whole height of the electronic oil pump is shortened, the path of the pressurized cooling oil flowing to the stator assembly is short, the time is less, and the cooling effect is better; on the other hand, accumulated installation errors are avoided, and the hidden danger of air gap eccentricity is avoided.
In this embodiment, the ball bearing 7 and the pump housing 1 are machined by the same mechanical jig, so that the two have very precise coaxiality and concentricity, and the air gap eccentricity can be precisely controlled.
Because the external gear is integrated in the motor rotor, the thermal expansion coefficients of the stator 8 and the pump body of the motor are consistent, the influence of temperature on the gap of the oil pump is greatly reduced, the gap of the end face of the pump is accurately ensured, and the influence of temperature on the flow efficiency of a system is effectively reduced or avoided.
The mechanism of cooling oil for cooling the stator assembly is as follows:
the motor rotor 2 and the external gear 3 drive the internal gear 6 to rotate around the shaft sleeve 4 so as to pressurize the cooling oil flowing in from the oil inlet 101, so that one path of pressurized cooling oil flows to the stator assembly through the pin 5 to cool the stator assembly, and the cooling oil subjected to heat exchange flows back to the low-pressure area.
In addition, another path of pressurized cooling oil is discharged directly from oil outlet 102 via the high-pressure region.
In this embodiment, the pin 5 is provided with a flow passage for cooling oil to pass through.
Furthermore, the pin 5 is of hollow or solid construction.
Specifically, the pin 5 is designed to be static and fixed, the shaft sleeve 4 is directly pressed on the pin 5, the internal gear 6 of the pump rotates relative to the shaft sleeve 4 under the drive of the external gear 3, the internal gear 6 is lubricated mutually, friction is reduced, loss of a rotor pump system is reduced, and the rotation stability of the rotor pump is effectively improved.
Because the height of the whole electronic oil pump is reduced, compared with the traditional electronic oil pump, the time for the pressurized cooling oil to flow to the stator assembly is short, and the cooling effect is better.
In the embodiment, the stator assembly comprises a stator 8 and a stator winding 9 arranged on the stator 8, and in the embodiment, the stator 8 is made of silicon steel sheets, so that the manufacturing cost is reduced and the friction force of a rotating part is reduced; the stator winding 9 has a wire diameter of 1.8mm, which greatly improves the performance of the rotor pump compared with the traditional 1.6 mm.
In this embodiment, the soft magnetic alloy rotor 2 is provided with radial magnetic steel 10, and the position thereof is monitored.
In order to simplify the design of the electrical control assembly, the conventional windings are simplified, and a hub 11 is provided above the stator assembly. The stator winding 10 is pipe-threaded on the hub 6.
A controller 12 is arranged above the concentrator 11, and the controller 12 can realize quick response; the motor has the characteristics of circuit reverse connection protection, signal interference prevention, oil temperature monitoring, over-temperature prevention, independent communication channels, motor angle position detection, motor rotating speed comparison receiving calculation and actual rotor rotating speed adjustment.
In order to separate the oil circuit and the electric control part, a heat-insulating sealing plate 13 is arranged between the controller 12 and the hub 11, so that the tightness is improved, the heat-insulating sealing plate 13 is matched and connected with the hub 11 for fixation, and a screw assembly and fixation structure is avoided in the oil pump.
The heat-insulating sealing plate 13 is provided with a PTC temperature sensor (not shown) for detecting the temperature of the feedback cooling oil, and the PTC temperature sensor (not shown) is electrically connected to the controller 12. The PTC temperature sensor can realize that the detected oil temperature is accurate to 0.1 ℃.
The specific process of cooling the stator assembly is as follows:
1) Firstly, the equipment is powered on, at the moment, the controller 12 is electrified, the controller 12 converts the electricity into three-phase electricity to supply power for the stator winding 9 on the hub 11, the electromagnetic force drives the motor rotor 2 and the external gear 3 to rotate, and the motor rotor 2 and the external gear 3 rotate to enable cooling oil flowing in from the oil inlet 101 to enter a low-pressure area after passing through the filter screen 14;
2) The motor rotor 2 and the external gear 3 drive the internal gear 6 to rotate around the shaft sleeve 4 so as to pressurize cooling oil flowing in from the oil inlet 101, so that one path of pressurized cooling oil flows to the stator assembly through the pin 5 to cool the stator assembly, the cooling oil subjected to heat exchange flows back to the low-pressure area again, centrifugal force is generated by utilizing difference between the internal gear and the external gear to pressurize the cooling oil, at the moment, the PTC temperature sensor feeds back the current temperature value of oil, and feeds back the temperature value to the controller 12, and the controller 12 feeds back the current oil temperature value to an external control system;
3) The pressurized other path of cooling oil passes from the high-pressure region and is discharged directly from oil outlet 102.

Claims (7)

1. The utility model provides a high integration electronic oil pump, includes pump case (1), be equipped with motor and rotor pump in pump case (1), the rotor pump is installed in inside the motor, wherein is equipped with ball bearing (7) between motor and the rotor pump, and the motor comprises internal gear (6), external gear (3) and pin (5), and the rotor pump comprises internal gear (6), external gear (3) and pin (5), its characterized in that hollow motor rotor (2) are installed to stator module inboard, motor rotor (2) inside is equipped with external gear (3) for external gear (3) are integrated in motor rotor (2) and pressfitting are as an organic whole, shaft sleeve (4) are installed at motor rotor (2) center, shaft sleeve (4) inboard is equipped with pin (5), the shaft sleeve (4) outside is equipped with internal gear (6), internal gear (6) and pin (5) are formed with shaft sleeve (4) pressfitting respectively, wherein internal gear (6) and external gear (3) meshing.
2. A highly integrated electronic oil pump according to claim 1, characterized in that the ball bearing (7) is arranged between the motor rotor (2) and the external gear (3) such that the ball bearing (7) is mounted at the rotor pump end.
3. A highly integrated electronic oil pump according to claim 1, characterized in that the ball bearing (7) and the pump housing (1) are machined with the same mechanical fixture.
4. A highly integrated electronic oil pump according to claim 2, characterized in that the coefficients of thermal expansion of the stator of the motor and the pump body of the rotor pump are identical.
5. A highly integrated electronic oil pump according to claim 1, characterized in that the pump housing (1) is provided with an oil inlet (101) and an oil outlet (102).
6. The high-integration electronic oil pump according to claim 5, wherein the motor rotor (2) and the external gear (3) drive the internal gear (6) to rotate around the shaft sleeve (4) to pressurize the cooling oil flowing from the oil inlet (101), so that one pressurized path of cooling oil flows to the stator assembly through the pin (5), cools the stator assembly, and the cooling oil subjected to heat exchange flows back to the low-pressure area; wherein the pressurized further cooling oil is directly discharged from the oil outlet (102) via the high-pressure zone.
7. A highly integrated electronic oil pump according to claim 1 or 6, characterized in that the inside of the pin (5) is provided with a flow channel for the passage of cooling oil.
CN202311608228.4A 2023-11-29 2023-11-29 High-integration electronic oil pump Pending CN117605681A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311608228.4A CN117605681A (en) 2023-11-29 2023-11-29 High-integration electronic oil pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311608228.4A CN117605681A (en) 2023-11-29 2023-11-29 High-integration electronic oil pump

Publications (1)

Publication Number Publication Date
CN117605681A true CN117605681A (en) 2024-02-27

Family

ID=89959244

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311608228.4A Pending CN117605681A (en) 2023-11-29 2023-11-29 High-integration electronic oil pump

Country Status (1)

Country Link
CN (1) CN117605681A (en)

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