CN111030383A - Self-pumping oil injection internal circulation heat dissipation motor used in low-temperature environment - Google Patents
Self-pumping oil injection internal circulation heat dissipation motor used in low-temperature environment Download PDFInfo
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- CN111030383A CN111030383A CN201911346399.8A CN201911346399A CN111030383A CN 111030383 A CN111030383 A CN 111030383A CN 201911346399 A CN201911346399 A CN 201911346399A CN 111030383 A CN111030383 A CN 111030383A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
- H02K9/197—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil in which the rotor or stator space is fluid-tight, e.g. to provide for different cooling media for rotor and stator
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Abstract
The invention discloses a self-pumping oil injection internal circulation heat dissipation motor used in low temperature environment, which comprises: motor casing (8), stator winding (2), stator core (3), rotor (4) and rotor shaft (6), still include: the oil pump (9), the oil nozzle (5) and the condensed oil (7); the rotor shaft (6) is of a partial hollow structure, one end of the rotor shaft is a power output end to drive a motor load, the rotor shaft is connected with a motor shell (8) through axial positioning of a bearing, and the other end of the rotor shaft is connected with an oil pump (9) through a spline structure (1); an oil nozzle (5) is arranged on the rotor shaft (6); an oil outlet of the oil pump (9) is axially arranged, and an oil inlet is communicated with the bottom of the motor; the condensed oil (7) is stored at the bottom of the motor. The invention reduces the external requirement of motor oil cooling on the system, obtains the advantage of oil injection cooling, has small power loss and good cooling effect, and can be suitable for occasions requiring small weight and small volume of the motor.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a self-pumping oil injection internal circulation heat dissipation motor used in a low-temperature environment.
Background
The motor is a key component of electromechanical energy conversion. In the process of electromechanical energy conversion, various losses exist, most of the losses are dissipated in a thermal mode, so that the temperature of the motor body rises, and when the temperature rises to a certain degree, key components such as windings, insulation and bearings in the motor can be burnt out at high temperature. If the heat generation and the heat dissipation of the motor body reach balance, the temperature of key components in the motor is kept within an allowable range, and the motor can work normally.
The cooling of the motor is mainly to transmit the heat generated by the motor to the outside of the motor as fast as possible, so that the inside of the motor does not generate an unallowable high temperature.
The cooling modes of a common small and medium-sized motor mainly include the following modes:
and (3) natural cooling: no cooling measures are taken.
Self-fan cooling: the motor rotor is provided with a cooling fan.
Forced air cooling: the motor is ventilated and cooled by external force.
Cooling the motor stator by circulating water: the shell is provided with a water channel and is cooled by water supplied by a water pump.
Cooling circulating oil of a motor stator: the shell is provided with an oil duct, oil is supplied through an oil pump, and hot oil is radiated through the outside.
Oil immersion cooling of the motor: the entire motor is completely immersed in oil, which dissipates heat in other ways.
The cooling modes of the middle-size and small-size motors which are commonly adopted at present are a motor stator circulating water cooling mode, a motor internal oil immersion cooling mode and a conventional motor rotor oil injection cooling mode.
A water cooling method for a motor stator, as shown in fig. 1, is a structure of a stator water cooling motor, and on the basis of a motor housing 8, a motor rotor shaft 6, a motor rotor 4, and a motor stator assembly (including a motor stator winding 2 and a motor stator core 3), a housing water channel 12 is opened in the motor housing 8 for circulating cooling water, and cooling water flows in from a water inlet 10 on the motor housing 8 (usually with the help of a pump outside the motor), and flows out from a water outlet 11 on the motor housing 8 after being cooled circularly. Although in most cases, the cooling water of the water-cooled motor needs to be pumped in and discharged by a water pump outside the motor, the method for circulating water cooling of the motor stator is still convenient and effective in consideration of the convenience and rapidness in obtaining water resources in underwater application environment. However, it can be found from the structure of the water-cooled motor that the housing has a water channel, and only the motor stator core 3 can be directly cooled, but the housing cannot be directly contacted with the heating source motor stator winding 2, so that it is difficult to achieve the best cooling effect.
The conventional motor rotor oil injection cooling mode. As shown in fig. 2, the structure of the rotor oil injection cooling motor is provided. In motor basic unit part motor casing 8, motor stator module (including motor stator core 3 and motor stator winding 2), electric motor rotor 4 and electric motor rotor axle 6, no longer need open the water course in the motor casing 8, electric motor rotor axle 5 need design into hollow shaft structure to install oil sprayer 5 (4 in the figure are only schematic) on rotor axle 6, oil sprayer and 6 cavity UNICOMs of rotor axle. One end of the rotor shaft 6 is connected with an oil pump 9, and is sequentially connected with an oil storage tank 13 and an oil cooling system 14 through pipelines, and finally is connected to the lower part inside the motor. During cooling operation, take oil to fuel sprayer 5 in with oil storage tank 13 internal cooling fluid through oil pump 9, spout cold oil atomizing on motor stator winding 2, then will have thermal oil mist condensation long-pending stay with the inside below of motor housing, condensation fluid 7 flows into outside fluid cooling system from the motor inside through the pipeline and cools off the heat dissipation, forms the closed loop, cools off the heat dissipation repeatedly to the motor. The oil injection cooling mode of the motor rotor can achieve the direct cooling of the motor stator winding 2, the heat dissipation effect is ideal, devices such as an oil pump, an oil tank radiator and a pipeline need to be configured outside the motor, the volume space is consumed, extra mass burden is increased, and the use requirements of all application scenes cannot be met.
From the above analysis it can be seen that:
the internal immersion oil cooling mode of motor stator circulation water, the casing water course can only directly cool motor stator iron core 3, and can not directly contact the source motor stator winding 2 that generates heat, so be difficult to reach best cooling effect.
The cooling mode of the oil immersion inside the motor is that the oil is stored inside the motor, and the oil is stirred by the rotation of the rotor to be taken up and thrown on the winding and simultaneously thrown on the water-cooled shell. The heat of the motor winding is transferred to the shell through the oil, and then is taken away by the water. The rotor speed cannot be too high and the rotor outer circle is smooth. The oil stirring method causes the oil stirring to be uneven, has torque pulsation and large power loss.
The conventional motor rotor oil injection cooling mode sprays cold oil on a motor winding in an atomized manner through an oil pump and an oil nozzle, then oil with heat is pumped to the outside from the inside of the motor through the oil pump to dissipate heat, the outside needs accessories such as a pump, an oil tank, a pipeline and a radiator, the weight of the motor is increased, and the motor rotor oil injection cooling mode is not suitable for occasions requiring small weight and small size of the motor.
Disclosure of Invention
The invention aims to overcome the technical defects and provides an automatic pump type oil injection internal circulation heat dissipation motor.
In order to achieve the above object, the present invention provides an automatic pump type oil injection internal circulation heat dissipation motor for use in low temperature environment, the motor comprising: motor casing, stator winding, stator core, rotor and rotor shaft, its characterized in that still includes: an oil pump, an oil nozzle and condensed oil;
the rotor shaft is of a partial hollow structure, one end of the rotor shaft is a power output end to drive a motor load, the rotor shaft is connected with a motor shell through axial positioning of a bearing, and the other end of the rotor shaft is connected with an oil pump through a spline structure;
the rotor shaft is provided with an oil nozzle;
an oil outlet of the oil pump is axially arranged, and an oil inlet is communicated with the bottom of the motor;
the condensed oil is stored at the bottom of the motor.
As an improvement of the device, the part of the rotor shaft in the motor shell is an oil way cavity, and the oil way cavity is isolated from the power output end and is completely closed.
As an improvement of the device, a plurality of groups of oil nozzles are arranged on the oil circuit cavity, each group of oil nozzles are uniformly distributed along the circumferential direction, and the oil circuit cavity is communicated with the oil circuit of each group of oil nozzles.
As an improvement of the above device, the oil injection nozzle is an oil injection nozzle having an atomizing function.
As an improvement of the device, the oil pump comprises a lateral oil inlet and an axial oil outlet.
As an improvement of the above device, the motor housing is a metal shell.
Compared with the prior art, the invention has the advantages that:
1. the invention reduces the external requirement of motor oil cooling on the system, does not need an external oil tank, a radiator and a pipeline, obtains the advantage of oil injection cooling, and has small power loss and good cooling effect;
2. the invention does not need an external oil tank, a radiator and a pipeline, and can be suitable for occasions requiring small weight and small volume of the motor.
Drawings
FIG. 1 is a schematic of a prior art water-cooling stator;
FIG. 2 is a schematic view of a prior art stator oil circulating rotor oil spray cooling;
FIG. 3 is a schematic diagram of the self-pumping oil injection internal circulation heat dissipation motor used in a low-temperature environment.
Reference numerals
1. Oil pump shaft and rotor shaft connecting spline 2 and stator winding
3. Stator core 4 and rotor
5. Oil nozzle 6 and rotor shaft
7. Condensate oil 8 and motor shell
9. Oil pump 61, oil passage cavity
10. Water inlet 11 and water outlet
12. Shell water channel 13 and oil storage tank
14. Oil cooling system
Detailed Description
The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and examples.
Example 1
The invention relates to a self-pumping oil injection internal circulation heat dissipation mode, and a self-pumping oil injection internal circulation heat dissipation motor structure is shown in figure 3. The motor is applied in an underwater environment.
The condensed oil is stored in the lower part inside the motor, the performance (such as rated power) of the motor is different according to the difference of the actual application environment of the motor, and the boiling point and the components of the condensed oil are different.
And one end of the rotor shaft 6 is connected with a motor shell 8 through axial positioning of a bearing and is used as a power output end to drive motor load, and the other end of the rotor shaft is connected with an oil pump 9 through a spline structure 1. The rotor shaft 6 is a hollow structure, and the part in the motor shell is an oil circuit cavity. A plurality of groups of oil nozzles 5 are installed on the oil path cavity 61, each group of oil nozzles 5 are uniformly distributed along the circumferential direction (the number of the oil nozzles is 4 in the figure, and a plurality of groups are arranged on the oil path cavity 61 according to the size of the motor), oil paths of all the oil nozzles 5 from the oil pump 9 to the oil path cavity 61 are completely communicated in a hollow mode, the oil path cavity 61 is mutually isolated from a power output end and is completely closed, and oil is ensured not to leak to the outside of the motor. The oil jet 5 is an oil jet having an atomizing action. The oil pump 9 requires that the pump body must be laterally fed with oil and axially discharged with oil. The motor housing 8 is a metal shell. The inner wall of the motor shell 8 and the inner wall of the oil way cavity 61 are subjected to certain sealing treatment, so that oil liquid is prevented from leaking to the outside of the motor.
The motor automatically drives the oil pump 9 during rotation to work, in pumping the pump chamber of oil pump 9 with bottom condensation fluid 7 in the motor, beat oil to the oil circuit cavity 61 by the pump chamber again, pressurized oil passes through fuel sprayer 5 on the rotor and spouts on motor winding 2, also spout on water-cooled motor casing 8 internal surface simultaneously (be applied to motor casing 8 of environment under water and be cooled by outside water environment), through oily heat transfer to casing 8 with motor winding 2, take away the heat by water again. The method reduces the external requirement of motor oil cooling on the system, does not need an external oil tank, a radiator and a pipeline, obtains the advantage of oil injection cooling, and has small power loss and good cooling effect. It should be noted that, the condensed oil is stored in the motor, the amount of the oil should be controlled to ensure that the liquid oil at the bottom does not pass through the lower end face of the motor rotor 4 during the operation of the motor, so that the extra loss caused by oil stirring of the motor rotor 4 during the operation can be avoided.
Example 2
The self-pumping oil injection internal circulation heat dissipation motor is not limited to be applied underwater, but is also suitable for the environment easy to dissipate heat of the motor shell, and comprises a motor with a water-cooling shell of an electric automobile, a large land machine such as a metallurgical continuous casting machine driven by the motor with the water-cooling shell, and the like.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited. Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (6)
1. A self-pumping oil-injection internal circulation heat dissipation motor for use in low-temperature environments, the motor comprising: motor casing (8), stator winding (2), stator core (3), rotor (4) and rotor shaft (6), its characterized in that still includes: the oil pump (9), the oil nozzle (5) and the condensed oil (7);
the rotor shaft (6) is of a partial hollow structure, one end of the rotor shaft is a power output end to drive a motor load, the rotor shaft is connected with a motor shell (8) through axial positioning of a bearing, and the other end of the rotor shaft is connected with an oil pump (9) through a spline structure (1);
an oil nozzle (5) is arranged on the rotor shaft (6);
an oil outlet of the oil pump (9) is axially arranged, and an oil inlet is communicated with the bottom of the motor;
the condensed oil (7) is stored at the bottom of the motor.
2. The self-pumping oil injection internal circulation heat dissipation motor for the low-temperature environment as claimed in claim 1, wherein the rotor shaft (6) is provided with an oil path cavity (61) at the inner part of the motor housing (8), and the oil path cavity (61) is isolated from the power output end and is completely closed.
3. The self-pumping oil injection internal circulation heat dissipation motor used in the low-temperature environment according to claim 2, wherein a plurality of groups of oil injection nozzles (5) are arranged on the oil path cavity (61), each group of oil injection nozzles (5) is uniformly distributed along the circumferential direction, and the oil path cavity is communicated with the oil path of each group of oil injection nozzles (5).
4. The self-pumping oil injection internal circulation heat dissipation motor used in the low-temperature environment according to claim 3, wherein the oil injection nozzle (5) is an oil injection nozzle with an atomization effect.
5. The self-pumping, oil-injected, internal-circulation, heat-dissipating motor for use in low temperature environments of claim 1, wherein said oil pump includes a lateral oil inlet and an axial oil outlet.
6. The self-pumping oil-injection internal-circulation heat-dissipation motor for low-temperature environment according to claim 1, wherein the motor housing (8) is a metal shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911346399.8A CN111030383A (en) | 2019-12-24 | 2019-12-24 | Self-pumping oil injection internal circulation heat dissipation motor used in low-temperature environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911346399.8A CN111030383A (en) | 2019-12-24 | 2019-12-24 | Self-pumping oil injection internal circulation heat dissipation motor used in low-temperature environment |
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| CN111030383A true CN111030383A (en) | 2020-04-17 |
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| CN201911346399.8A Pending CN111030383A (en) | 2019-12-24 | 2019-12-24 | Self-pumping oil injection internal circulation heat dissipation motor used in low-temperature environment |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111564927A (en) * | 2020-05-18 | 2020-08-21 | 珠海格力电器股份有限公司 | Hollow shaft sealing ring, hollow shaft, rotor structure, motor and electric automobile |
| CN112615483A (en) * | 2020-11-26 | 2021-04-06 | 中国船舶重工集团公司第七0五研究所 | Counter-rotating permanent magnet motor |
| CN113036968A (en) * | 2021-03-16 | 2021-06-25 | 东南大学 | Rotor internal oil circuit cooling structure |
| CN117927439A (en) * | 2024-03-18 | 2024-04-26 | 潍柴动力股份有限公司 | Integrated electric pump and vehicle |
| CN118040986A (en) * | 2024-04-12 | 2024-05-14 | 西北工业大学 | Air cooling and oil cooling combined underwater motor system and underwater equipment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104979959A (en) * | 2015-06-25 | 2015-10-14 | 湖北航达科技有限公司 | Oil-cooled frequency conversion alternator |
| CN109314443A (en) * | 2016-06-07 | 2019-02-05 | 特斯拉公司 | For heating the electric notor waste heat mode of battery |
-
2019
- 2019-12-24 CN CN201911346399.8A patent/CN111030383A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104979959A (en) * | 2015-06-25 | 2015-10-14 | 湖北航达科技有限公司 | Oil-cooled frequency conversion alternator |
| CN109314443A (en) * | 2016-06-07 | 2019-02-05 | 特斯拉公司 | For heating the electric notor waste heat mode of battery |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111564927A (en) * | 2020-05-18 | 2020-08-21 | 珠海格力电器股份有限公司 | Hollow shaft sealing ring, hollow shaft, rotor structure, motor and electric automobile |
| CN112615483A (en) * | 2020-11-26 | 2021-04-06 | 中国船舶重工集团公司第七0五研究所 | Counter-rotating permanent magnet motor |
| CN113036968A (en) * | 2021-03-16 | 2021-06-25 | 东南大学 | Rotor internal oil circuit cooling structure |
| CN117927439A (en) * | 2024-03-18 | 2024-04-26 | 潍柴动力股份有限公司 | Integrated electric pump and vehicle |
| CN118040986A (en) * | 2024-04-12 | 2024-05-14 | 西北工业大学 | Air cooling and oil cooling combined underwater motor system and underwater equipment |
| CN118040986B (en) * | 2024-04-12 | 2024-06-21 | 西北工业大学 | Air cooling and oil cooling combined underwater motor system and underwater equipment |
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Application publication date: 20200417 |
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| RJ01 | Rejection of invention patent application after publication |