CN214850775U - Oil-cooled motor with liquid-driven rotary spraying structure - Google Patents
Oil-cooled motor with liquid-driven rotary spraying structure Download PDFInfo
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- CN214850775U CN214850775U CN202120688204.4U CN202120688204U CN214850775U CN 214850775 U CN214850775 U CN 214850775U CN 202120688204 U CN202120688204 U CN 202120688204U CN 214850775 U CN214850775 U CN 214850775U
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Abstract
The utility model discloses an oil-cooled motor with liquid-driven rotary spraying structure, which is used for realizing rotary spraying cooling of a stator end winding and comprises a motor shell, front and rear end covers of the motor shell, a stator core, a stator winding, a rotor and a rotating shaft, wherein the motor shell is provided with an oil inlet and a shell oil duct leading to the front and rear end covers of the motor shell; oil ducts are respectively arranged on the front end cover and the rear end cover of the motor shell, and the oil ducts on the front end cover and the rear end cover of the motor shell are communicated with the oil ducts of the shell; and rotary spraying devices are arranged on the front end cover and the rear end cover of the motor shell. The utility model discloses utilize liquid to produce drive power from spouting oil ring nozzle blowout, it is rotatory to drive oil ring, realizes spraying the cooling to the rotation of motor end winding, has both reduced the impact to end winding, has improved the homogeneity that the coolant oil distributes again, and then has improved the temperature uniformity and the power density of motor.
Description
Technical Field
The utility model belongs to the technical field of the motor cooling, more specifically relates to an oil cooling motor with liquid drive rotation sprays structure.
Background
With the continuous development of new energy automobile driving motor technology, driving motors are developed towards high torque density and high power density, the high torque density and the high power density are closely related to the heat dissipation mode of the motors, and the continuous power and the continuous torque of the motors can be improved through high-efficiency heat dissipation capacity. From the visual representation of the electric automobile, the efficient heat dissipation capability improves the climbing capability and the acceleration capability of the motor, reduces the weight of the motor, realizes the light weight of the iron core, or increases the rated power and the peak power under the condition that the effective mass of the motor is not increased; the space volume and the weight of the power assembly are reduced, and the power density of the driving motor is effectively improved, so that the weight of the whole vehicle is reduced, and the performance and the efficiency of the whole vehicle are improved.
The Li, Li and standard waves (Ye L., TaoF., Wei S., etc. of the institute of Electrical appliances of Chinese academy of sciences, etc. Experimental research on the oil winding of the end winding of the motor [ Z ],2016.) utilize the glass fiber sleeve to separate the stator and rotor, carry on the immersion oil cooling to the end winding, has reduced the temperature rise of the motor winding, but the difficulty is great on the process, the air gap size of the motor is smaller at present and is difficult to add the separation device to isolate the stator and rotor; tanguy Davin (DavinTanguy, Pellee Julien, Harmand Soud, et al. Experimental study of oil mutual systems for electric motors [ J ]. Applied Thermal Engineering,2015.) et al use a machine case fixed nozzle to cool the motor, reduce the temperature rise of the motor windings and improve the motor performance, but the temperature distribution of the end windings of the motor is not uniform; the rotor hollow shaft oil slinging cooling is researched by a combined simulation and experiment mode of twin (Lim Dong-Hyun, Kim Sung-Chul. Thermal performance of oil spraying cooling system for in-wheel motor in electric vehicles [ J ]. Applied Thermal Engineering,2014,63(2):577-587.), and the like, so that the temperature rise of the motor is greatly improved, the temperature distribution of the motor is uniform, the processing cost of the hollow shaft is high, and the motor is impacted by the too fast spraying speed of the cooling oil.
The 2016 BAESYSTEMS company ENGBLOM, Daniel discloses a liquid cooled electric machine utility model which relies on a dynamic seal to provide a fuel injector which can move relative to the stator winding in order to avoid coil erosion caused by fixed point fuel injection cooling and adverse effects of the oil-air mixture on the performance of the oil pump after spray cooling, while avoiding corrosion damage to the electric machine and local overheating. The yulai car limited zhangshixiang etc. in 2017 discloses an oil-cooled motor utility model, and characteristics are that rotor core circumference distributes a plurality of logical grooves that contain the conducting bar, and partial oil in the stator shell oil duct gets into conducting bar cooling rotor, and the part is from the nozzle opening blowout cooling stator winding towards stator winding, and its shortcoming is that there is the wind pressure in the conducting bar, and the cooling oil is difficult to get into.
Firstly, the oil-cooled motor in the current market adopts fixed spray cooling, and is provided with a fixed spray oil duct and spray holes to carry out spray cooling on the motor; and secondly, rotary spray cooling is carried out, a hollow shaft design is adopted, an outlet hole is formed in the shaft, and cooling oil is thrown out of a winding or an iron core by utilizing the rotation of a rotor. Compared with fixed spraying, the rotary spraying cooling oil is more uniformly distributed, and local high-temperature points can be avoided. However, the rotor sprays, the rotating speed of the rotor is high, the cooling oil is thrown out quickly, impact on the end winding is large, the winding deformation and the insulation layer falling are easily caused, the motor is out of service, and the hollow shaft is high in processing cost.
SUMMERY OF THE UTILITY MODEL
In view of the above problem, the utility model provides an oil-cooled motor with liquid drive rotation sprays structure and has oil-cooled motor of this structure, it is rotatory through end cover setting rotatory spray ring and dynamic seal device around the motor, and it is rotatory from spray ring nozzle spun reaction force drive spray ring to utilize the coolant oil, realizes the rotatory spray cooling to motor end winding. Because the rotation of spraying ring is by liquid drive, thereby can reduce the impact to the motor through the flow and the pressure of control cooling oil, realize the comprehensive cooling to the motor.
The utility model discloses at least, one of following technical scheme realizes.
An oil-cooled motor with a liquid-driven rotary spraying structure is used for realizing rotary spraying cooling of a stator end winding and comprises a motor shell, front and rear end covers of the motor shell, a stator core, a stator winding, a rotor and a rotating shaft, wherein the motor shell is provided with an oil inlet and a shell oil duct leading to the front and rear end covers of the motor shell; the front end cover and the rear end cover of the motor shell are respectively provided with an oil duct, and the oil ducts on the front end cover and the rear end cover of the motor shell are communicated with the oil duct of the shell. And rotary spraying devices are arranged on the front end cover and the rear end cover of the motor shell.
Preferably, the rotary spraying device comprises a rotary spraying ring and a dynamic sealing device;
the dynamic sealing devices are arranged on the front end cover and the rear end cover of the motor shell;
the rotary spraying ring is arranged on the dynamic sealing device, the rotary spraying ring, the front end cover and the rear end cover of the motor shell and the dynamic sealing device form a rotary spraying oil cavity, and the rotary spraying oil cavity is communicated with oil ducts of the front end cover and the rear end cover of the motor shell.
Preferably, the rotary spray ring comprises nozzles and a spray ring, the spray ring is mounted on the dynamic sealing device, and the nozzles are uniformly distributed along the circumferential direction of the spray ring.
Preferably, the sum of the nozzle sectional areas of the nozzles is half of the sectional area of the oil passage of the machine shell.
Preferably, the bottom of the front end cover and the bottom of the rear end cover of the motor shell are respectively provided with a front end cover oil outlet and a rear end cover oil outlet.
Preferably, the dynamic sealing device is a rolling bearing or a sliding bearing or a rubber silica gel sealing ring.
Preferably, the nozzle is circular or rectangular or polygonal in shape.
Preferably, the central axis of the nozzle is aligned with the middle position inside the end winding of the motor.
Preferably, the sum of the areas of the nozzles is smaller than the sectional area of the oil passage of the machine shell.
Preferably, two dynamic sealing devices are arranged on each end cover in front and rear end covers of the motor shell.
The utility model discloses a rotatory spray set (structure) utilizes liquid to produce drive power from spouting oil ring nozzle blowout, and it is rotatory to drive the oil ring that spouts, realizes spraying the cooling to the rotation of motor end winding, has both reduced the impact to end winding, has improved the homogeneity that the coolant oil distributes again, and then has improved the temperature uniformity and the power density of motor.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses a rotatory structure that sprays of liquid drive, it sets up rotatory spray ring and dynamic seal device through the end cover around the motor, and it is rotatory to utilize the coolant oil to spray ring nozzle spun reaction force drive spray ring, realizes the rotatory spray cooling to motor end winding. The rotating speed and the spraying speed of the spraying ring can be controlled through the flow and the pressure of the cooling oil, so that the impact on the motor is small, and the cooling is more reliable and comprehensive; and a complex hollow shaft does not need to be processed, so that the production cost of the motor is reduced.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention.
Fig. 1 is a schematic view of a cross-sectional structure of an oil-cooled motor of the liquid-driven rotary spraying structure and the oil-cooled motor with the same of the present invention;
fig. 2 is a schematic view of the liquid-driven rotary spray ring structure of the liquid-driven rotary spray structure and the oil-cooled motor with the same of the present invention;
fig. 3 is a schematic view of a cross-sectional structure of a liquid-driven rotary spray ring of the liquid-driven rotary spray structure and the oil-cooled motor with the same of the present invention;
fig. 4 is a schematic view of the liquid-driven rotary spraying structure and a partial enlarged structure of a rotary spraying oil cavity of an oil-cooled motor with the structure of the present invention;
FIG. 5 is a schematic cross-sectional view of the oil-cooled motor of FIG. 1;
wherein: 1-motor shell, 11-oil inlet, 12-shell oil duct, 2-motor front end cover, 21-front end cover oil duct, 22-front end cover oil outlet, 3-motor rear end cover, 31-rear end cover oil duct, 32-rear end cover oil outlet, 4-stator iron core, 5-stator winding, 6-rotor, 7-rotating shaft, 8-rotary spray ring, 81-rotary spray oil cavity, 82-nozzle and 9-dynamic sealing device.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
As shown in fig. 1, an oil-cooled motor having a liquid-driven rotary spray structure includes: the motor comprises a motor shell 1, a front end cover and a rear end cover of the motor shell 1, namely a motor front end cover 2 and a motor rear end cover 3, a stator core 4, a stator winding 5, a rotor 6 and a rotating shaft 7, wherein the stator 4 is arranged in the motor shell 1 (in interference fit and in key groove positioning), the front end cover 2 and the rear end cover 3 are arranged at two ends of the motor shell 1 (in spigot positioning and bolt connection), bearings are arranged in the front end cover and the rear end cover, the rotor 6 is arranged on the rotating shaft 7, and the rotating shaft 7 penetrates through the bearings of the front end cover and the rear end cover; and rotary spraying devices are arranged on the front end cover and the rear end cover of the motor shell.
The rotary spraying device comprises a rotary spraying ring 8 and a dynamic sealing device 9;
the dynamic sealing device 9 is arranged on the front end cover and the rear end cover of the motor shell;
the rotary spraying ring 8 is arranged on the dynamic sealing device, the rotary spraying ring 8, the front end cover and the rear end cover of the motor shell and the dynamic sealing device 9 form a rotary spraying oil cavity, and the rotary spraying oil cavity is communicated with oil ducts of the front end cover and the rear end cover of the motor shell.
The rotary spraying ring 8 comprises a nozzle and a spraying ring, the spraying ring is arranged on the dynamic sealing device, and the nozzle is uniformly distributed along the circumferential direction of the spraying ring.
The nozzle is circular or rectangular or polygonal in shape.
The central axis of the nozzle is aligned with the middle position of the inner side of the end winding of the motor.
The sum of the areas of the nozzles is smaller than the sectional area of the oil passage of the shell.
As shown in fig. 1 and 4, an oil inlet 11 and a casing oil duct 12 leading to front and rear end covers of the motor casing are formed in the motor casing 1, and cooling oil enters the casing oil duct 12 through the oil inlet 11;
the motor front end cover 2 and the motor rear end cover 3 are respectively provided with a front end cover oil way 21 and a rear end cover oil way 31, and each end cover oil way is connected with the shell oil way 12.
The cooling oil enters from an oil inlet of the shell, flows through an oil duct of the shell, enters oil ducts of front and rear end covers of the motor shell, reaches the rotary spraying oil cavity, is sprayed out through a nozzle of the rotary spraying ring 8, and simultaneously drives the rotary spraying ring 8 to rotate, so that the rotary spraying cooling of the end winding of the motor is realized.
The motor shell is characterized in that the front end cover and the rear end cover of the motor shell are respectively provided with a dynamic sealing device 9, each end cover is provided with two dynamic sealing devices 9, and each dynamic sealing device 9 is provided with a rotary spraying ring 8.
The dynamic sealing device 9 is one of a rolling bearing, a sliding bearing and a rubber sealing ring.
As a preferred embodiment, a needle bearing may be selected as the dynamic seal. The needle bearing has reliable mechanical sealing performance and long service life, does not need frequent maintenance, and can meet the sealing requirements of harsh working conditions such as high temperature, low temperature, high speed, various strong corrosive media, solid particle-containing media and the like in the use process of the motor.
With reference to fig. 5, the rotary spray ring 8, the motor front end cover 2, the motor rear end cover 3 and the dynamic sealing device 9 form a rotary spray oil chamber 81, and the rotary spray oil chamber 81 is communicated with end cover oil passages (21, 31) of the motor front end cover 2 and the motor rear end cover 3; the cooling oil enters from the oil inlet of the shell 1, flows through the oil duct 12 of the shell, enters the oil duct 31 of the rear end cover, reaches the rotary spraying oil cavity 81, is sprayed out through the nozzle 82 of the rotary spraying ring 8, simultaneously drives the rotary spraying ring 8 to rotate, realizes the rotary spraying cooling of the end winding of the motor, can effectively cool the winding with the most serious heating of the motor, and further prolongs the service life of the driving motor. The bottom of the motor front end cover 2 and the bottom of the motor rear end cover 3 are respectively provided with a front end cover oil outlet 22 and a rear end cover oil outlet 32, and cooling oil flows out of the oil outlets after spraying on the end windings.
With reference to fig. 2 and 3, the number of the nozzles 82 on the rotary spray ring 8 is 6, and the nozzles are uniformly distributed along the circumferential direction of the spray ring;
the rotating spray ring nozzles 82 are circular in shape.
As a preferred embodiment, the nozzles can be selected to be circular, and the sum of the nozzle sectional areas of the six nozzles is half of the oil passage sectional area of the machine shell.
With reference to fig. 1 and 5, the central axis of the rotary spray ring nozzle 8 is aligned with the middle position of the inner side of the end winding of the motor, and after cooling oil is sprayed to the end winding, the cooling oil is distributed more uniformly in the axial direction of the motor.
When the cooling device is used, cooling oil is injected into a machine shell from an oil inlet 11 by an oil pump, the cooling oil enters the machine shell and then flows into front and rear end cover oil ways of the motor shell through a machine shell oil way 12, the cooling oil is sprayed to a motor end winding through rotary spraying rings 8 on front and rear end covers of the motor shell, the spraying rings 8 are driven to rotate at the same time, comprehensive cooling of the end winding is realized, and the oil after cooling a stator winding is discharged through oil outlets of the front and rear end covers of the motor shell.
In order to make the technical field better understand the solution of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and the detailed description. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Claims (10)
1. An oil-cooled motor with a liquid-driven rotary spraying structure is used for realizing rotary spraying cooling of a stator end winding and comprises a motor shell, front and rear end covers of the motor shell, a stator core, a stator winding, a rotor and a rotating shaft, and is characterized in that the motor shell is provided with an oil inlet and a shell oil duct leading to the front and rear end covers of the motor shell; oil ducts are respectively arranged on the front end cover and the rear end cover of the motor shell, and the oil ducts on the front end cover and the rear end cover of the motor shell are communicated with the oil ducts of the shell; and rotary spraying devices are arranged on the front end cover and the rear end cover of the motor shell.
2. The oil-cooled motor with a liquid-driven rotary spray structure of claim 1, wherein the rotary spray device comprises a rotary spray ring and a dynamic seal device;
the dynamic sealing devices are arranged on the front end cover and the rear end cover of the motor shell;
the rotary spraying ring is arranged on the dynamic sealing device, the rotary spraying ring, the front end cover and the rear end cover of the motor shell and the dynamic sealing device form a rotary spraying oil cavity, and the rotary spraying oil cavity is communicated with oil ducts of the front end cover and the rear end cover of the motor shell.
3. The oil-cooled motor with a liquid-driven rotary spray structure of claim 2, wherein the rotary spray ring comprises spray nozzles and a spray ring, the spray ring is mounted on the dynamic seal device, and the spray nozzles are uniformly distributed along the circumference of the spray ring.
4. An oil-cooled motor with a liquid-driven rotary spray structure as claimed in claim 3, wherein: the sum of the nozzle sectional areas of the nozzles is half of the sectional area of the oil passage of the machine shell.
5. An oil-cooled motor with a liquid-driven rotary spray structure as claimed in claim 4, wherein: the bottom of the front end cover and the bottom of the rear end cover of the motor shell are respectively provided with a front end cover oil outlet and a rear end cover oil outlet.
6. An oil-cooled motor with a liquid-driven rotary spray structure as claimed in claim 5, wherein: the dynamic sealing device is a rolling bearing or a sliding bearing or a rubber silica gel sealing ring.
7. An oil-cooled motor with a liquid-driven rotary spraying structure as claimed in claim 6, wherein the nozzle is circular or rectangular or polygonal in shape.
8. An oil-cooled motor with a liquid-driven rotary spray arrangement as claimed in claim 7, wherein the central axis of the nozzle is aligned with a central location inside the motor end windings.
9. The oil-cooled motor having a liquid-driven rotary spray structure as claimed in claim 8, wherein the sum of the areas of the nozzles is smaller than the cross-sectional area of the oil passages of the casing.
10. The oil-cooled motor with the liquid-driven rotary spraying structure as claimed in any one of claims 1 to 9, wherein two dynamic sealing devices are arranged on each end cover in front and rear end covers of the motor shell.
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| CN202120688204.4U CN214850775U (en) | 2021-04-02 | 2021-04-02 | Oil-cooled motor with liquid-driven rotary spraying structure |
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| CN202120688204.4U CN214850775U (en) | 2021-04-02 | 2021-04-02 | Oil-cooled motor with liquid-driven rotary spraying structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113162299A (en) * | 2021-04-02 | 2021-07-23 | 华南理工大学 | Oil-cooled motor with liquid-driven rotary spraying structure |
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- 2021-04-02 CN CN202120688204.4U patent/CN214850775U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113162299A (en) * | 2021-04-02 | 2021-07-23 | 华南理工大学 | Oil-cooled motor with liquid-driven rotary spraying structure |
| CN113162299B (en) * | 2021-04-02 | 2024-04-26 | 华南理工大学 | Oil cooling motor with liquid-driven rotary spraying structure |
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