CN219287256U - High-speed motor - Google Patents
High-speed motor Download PDFInfo
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- CN219287256U CN219287256U CN202320658834.6U CN202320658834U CN219287256U CN 219287256 U CN219287256 U CN 219287256U CN 202320658834 U CN202320658834 U CN 202320658834U CN 219287256 U CN219287256 U CN 219287256U
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- 238000001816 cooling Methods 0.000 claims abstract description 50
- 230000017525 heat dissipation Effects 0.000 claims abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000003921 oil Substances 0.000 claims description 97
- 238000007789 sealing Methods 0.000 claims description 92
- 125000006850 spacer group Chemical group 0.000 claims description 41
- 239000010687 lubricating oil Substances 0.000 claims description 34
- 230000005389 magnetism Effects 0.000 claims description 15
- 239000000498 cooling water Substances 0.000 claims description 12
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 description 7
- 238000005461 lubrication Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Motor Or Generator Cooling System (AREA)
Abstract
The utility model belongs to the field of motors, and discloses a high-speed motor, which comprises a motor rotor rotatably mounted with a motor shell through a bearing and a motor stator arranged between the motor shell and the motor rotor, wherein the motor rotor comprises a front section shaft, a permanent magnet and a rear section shaft which are coaxially arranged, and the permanent magnet is arranged in a non-magnetic closed cylinder and is in tight fit with the closed cylinder; the heat dissipation system of the high-speed motor comprises an oil cooling system, an air cooling system and a water cooling system; the permanent magnet of the motor rotor of the high-speed motor is firmly and reliably installed, the occupied space is small, the structure is compact, the whole high-speed motor has good heat dissipation effect, and the reliability and the service life of the high-speed motor are greatly improved.
Description
Technical Field
The utility model relates to the technical field of motors, in particular to a high-speed motor.
Background
The permanent magnet high-speed motor has the advantages of high rotating speed (the rotating speed of the motor exceeds ten thousand revolutions per minute, even up to several tens of thousands of revolutions per minute), high power density, no need of a variable speed structure, low noise, quick dynamic response and the like, and is widely applied to the fields of mines, ships, spaceflight and the like.
Wherein, the motor rotor is a key core component of the permanent magnet high-speed motor. The conventional motor rotor is generally provided with permanent magnets in a surface-mounted manner, and then is sleeved with a magnetic protection sleeve. For example, in chinese patent application publication No. CN103633781a, entitled "cooling of motor stator", a conventional surface-mount method is adopted for a motor rotor of a high-speed motor. For a high-speed motor, a surface-mounted mode is adopted, so that on one hand, the radial size of a rotor is increased, and the motor is not beneficial to miniaturization; on the other hand, because the motor rotation speed is high, the permanent magnet of pasting is difficult to bear huge centrifugal force, and the inside temperature is very high in the period of high-speed operation of motor in addition, even the cover has the magnetism protection sleeve also be difficult to guarantee that the permanent magnet of pasting can not become flexible, causes the destruction of permanent magnet even, influences the motor life-span, and in addition the surface mounting often makes the motor possess many pairs of poles, can increase the switching frequency of motor controller, increases the control degree of difficulty, improves manufacturing and use cost.
In addition, the motor can generate a large amount of heat due to factors such as iron loss, copper loss, mechanical loss and the like in the operation process, and the generated heat needs to be dissipated in time, otherwise, the temperature in the motor is increased to cause the problems of aging of insulating materials, demagnetization of a rotor, reduction of mechanical strength and the like of the motor, and the reliability and the service life of the motor are affected. The high-speed motor has high rotating speed, the loss of the motor is easy to increase along with the geometric progression of the rotating speed, the heat generated by the high loss enables the temperature rise of the motor to increase rapidly, and a good heat dissipation mode is required to be designed in order to keep the motor running at high speed. The traditional motor heat dissipation mode is mostly inside natural air suction forced air cooling heat dissipation, and the cooling air directly sucks the motor inside through the fan, and although can take away the partial heat of coil and iron core, forced air cooling heat dissipation means is single, and radiating efficiency is low, and motor heat dissipation is incomplete. In some high-speed motors, an oil cooling heat dissipation method is adopted, for example, in the chinese patent application with publication number CN103633781a and entitled "cooling of motor stator", the heat dissipation of the motor stator and the bearing is emphasized by adopting the oil cooling method, and although the heat dissipation effect is improved, the structure of the oil cooling heat dissipation system is complex, and the heat dissipation means is single, and there is still the problem that the heat dissipation effect of the motor is not ideal, so that the reliability and the service life of the motor are affected.
Based on the above-described drawbacks of the conventional high-speed motor, it is therefore necessary for those skilled in the art to improve it.
Disclosure of Invention
In view of this, the object of the present utility model is: the high-speed motor with compact structure and good heat dissipation effect is provided, and the reliability and the service life of the motor are improved.
In order to solve the technical problems, the technical scheme of the utility model is as follows: the high-speed motor, the high-speed motor include motor housing, through the bearing with motor housing rotates the motor rotor of installation, set up in motor housing with motor stator between the motor rotor, the bearing inner race of bearing install in motor rotor, the bearing outer lane of bearing is installed in the bearing frame, the high-speed motor is provided with cooling system, motor rotor includes:
the permanent magnet is arranged in the non-magnetic closed cylinder body, and is tightly matched with the closed cylinder body;
the front section shaft, one end of the front section shaft is fixedly connected with one end of the closed cylinder;
one end of the rear section shaft is fixedly connected with the other end of the closed cylinder;
the front section shaft, the permanent magnet and the rear section shaft are coaxially arranged.
The following are further improvements to the high speed motor of the present utility model:
the closed cylinder comprises magnetic isolation sheets arranged at two ends of the permanent magnet and a magnet protection sleeve which is arranged on the outer surfaces of the permanent magnet and the magnetic isolation sheets in an interference manner; the permanent magnet is a solid cylinder, the magnetism isolating sheet is a round sheet, and the magnet protecting sleeve is a hollow cylinder with two open ends.
The inner part of one end, connected with the closed cylinder, of the front section shaft and the rear section shaft is of a hollow structure, and a hollow inner cavity is formed by enclosing the hollow structure with the closed cylinder.
Wherein, the cooling system includes oil cooling system, oil cooling system includes:
the spacer sleeve and the distance sleeve are respectively positioned at two sides of the bearing and are used for positioning the bearing inner ring, the lubricating oil chamber is enclosed by the spacer sleeve, the distance sleeve and the bearing seat, the bearing is positioned in the lubricating oil chamber, and a bearing seat oil inlet passage and a bearing seat oil return passage which are respectively communicated with the lubricating oil chamber are arranged in the bearing seat;
the oil inlet is communicated with the bearing seat oil inlet channel, and the oil return port is communicated with the bearing seat oil return channel.
One end of the spacer sleeve is propped against the bearing inner ring, the other end of the spacer sleeve is propped against the shaft shoulder, a spacer sleeve cone table top is arranged on the periphery of the spacer sleeve, and the small diameter end of the spacer sleeve cone table top is adjacent to the bearing inner ring; the outer peripheral surface of the distance sleeve is sequentially provided with a distance sleeve conical table surface, a positioning step surface and a distance sleeve cylindrical surface, the bearing inner ring is arranged on the distance sleeve cylindrical surface and abuts against the positioning step surface, and the small-diameter end of the distance sleeve conical table surface is adjacent to the bearing inner ring.
One end of the spacer sleeve, which is abutted against the shaft shoulder, is provided with a spacer sleeve ring groove, the spacer sleeve ring groove is positioned outside the shaft shoulder, the inner side of the lubricating oil chamber is provided with an inner side sealing cover plate, and the inner side sealing cover plate is clamped with the spacer sleeve ring groove; the end face of the large-diameter end of the distance sleeve is provided with a distance sleeve ring groove, the outer side of the lubricating oil chamber is provided with an outer sealing cover plate, and the outer sealing cover plate is clamped with the distance sleeve ring groove.
The bearing seat oil inlet channel comprises a bearing seat oil inlet channel radial section and a bearing seat oil inlet channel axial section which are communicated, and the oil inlet is connected with the bearing seat oil inlet channel radial section;
the outer side of the bearing seat is provided with a sealing seat, the sealing seat is sleeved on the periphery of the distance sleeve, a sealing seat oil inlet channel is arranged in the sealing seat, the sealing seat oil inlet channel comprises a sealing seat oil inlet channel axial section and a sealing seat oil inlet channel inclined section which are communicated, the sealing seat oil inlet channel axial section is connected with the bearing seat oil inlet channel axial section, and the sealing seat oil inlet channel inclined section is communicated with the lubricating oil chamber;
the bearing seat oil return channel is positioned at the bottom of the bearing seat, and the inner wall of the bearing seat is provided with a bearing seat converging groove communicated with the bearing seat oil return channel.
Wherein, the cooling system still includes air-cooled system, air-cooled system includes: the air inlet and the air outlet are arranged on the motor shell and are respectively communicated with the inner cavity of the motor;
the output end of the high-speed motor is marked as a front end, the other end far away from the front end is marked as a rear end, the air inlet is close to the front end, and the air outlet is close to the rear end; the motor is characterized in that a bearing seat mounting plate is arranged inside the front end of the motor shell, an air passing channel is arranged on the bearing seat mounting plate, and the air inlet is communicated with the inner cavity of the motor through the air passing channel.
Wherein, the cooling system still includes water cooling system, water cooling system includes: the motor shell comprises a motor inner shell and a motor outer shell which are combined together, the cooling water cavity is formed between the motor inner shell and the motor outer shell, and the water inlet and the water return port are arranged on the motor outer shell and are respectively communicated with the cooling water cavity; the water inlet is close to the front end of the high-speed motor, and the water return port is close to the rear end of the high-speed motor.
Wherein, the cooling water cavity is internally provided with a diversion trench.
After the technical scheme is adopted, the utility model has at least the following beneficial effects:
because the motor rotor of the high-speed motor comprises the front section shaft, the permanent magnet and the rear section shaft which are coaxially arranged, the permanent magnet is arranged in the non-magnetic closed cylinder and is tightly matched with the closed cylinder, one end of the front section shaft is fixedly connected with one end of the closed cylinder, and one end of the rear section shaft is fixedly connected with the other end of the closed cylinder; because the permanent magnet is tightly constrained in the non-magnetic closed cylinder, the magnetic leakage of the permanent magnet can be reduced, and the performance of the permanent magnet can be improved; the motor rotor rotates at a high speed to generate a huge centrifugal force, and the permanent magnet is not loosened and is not easy to destroy under the reliable protection of the closed cylinder, so that the service life of the motor rotor is ensured; compared with the surface-mounted mode, the permanent magnet is arranged in the closed cylinder, so that the rotor has a relatively small radial size, small occupied space and simple structure; and the motor rotor is more convenient to assemble, and the cost is greatly reduced.
Because the front section shaft and the rear section shaft are hollow structures in the end, which is connected with the closed cylinder, on one hand, the hollow structures reduce the rotational inertia of the motor rotor, are beneficial to the dynamic balance of the whole motor rotor, are beneficial to the miniaturization and light weight design of the motor rotor, and can effectively improve the transient response of the motor; on the other hand, the hollow structure can also effectively reduce the heat transfer of the motor heat to the bearing direction, reduce the working temperature of the bearing, improve the service life of the bearing, and then improve the reliability and service life of the high-speed motor.
The heat dissipation system of the high-speed motor comprises the oil cooling system, the air cooling system and the water cooling system, various heat dissipation means are comprehensively adopted, the oil cooling system is used for conducting heat dissipation and cooling on parts such as a bearing and the like, the air cooling system is used for conducting heat dissipation and cooling on parts inside the motor such as a motor stator and a motor rotor, the water cooling system is used for conducting heat dissipation and cooling on the motor stator and a motor inner shell, the whole motor is comprehensively cooled, the heat dissipation efficiency is high, the problem that the rotation speed is limited due to temperature rise of the motor and the motor cannot run for a long time is solved, and the reliability and the service life of the high-speed motor are improved.
Drawings
FIG. 1 is a schematic diagram of the outline structure of a high-speed motor according to an embodiment of the present utility model;
FIG. 2 is a schematic cross-sectional view of a high-speed motor according to an embodiment of the present utility model;
FIG. 3 is a schematic view of the motor rotor of FIG. 2;
FIG. 4 is a schematic view of the sealing cap plate structure of FIG. 2;
FIG. 5 is a schematic view of the seal holder of FIG. 2;
figure 6 is a schematic illustration of the seal cartridge of figure 2;
FIG. 7 is a schematic view of the distance sleeve of FIG. 2;
FIG. 8 is a schematic view of the spacer sleeve of FIG. 2;
in the figure: 1. a motor rotor; 101. a front section shaft; 102. magnetic isolating sheets; 103. a permanent magnet; 104. a magnet protective sleeve; 105. a rear section shaft; A. a front hollow interior cavity; B. a rear hollow interior cavity;
2. a bearing; 3. a bearing seat; 31. a radial section of an oil inlet channel of the bearing seat; 32. an axial section of an oil inlet duct of the bearing seat; 33. the bearing seat oil return channel; 34. bearing seat converging groove; 4. sealing sleeve; 41. an inner housing of the motor; 411. a gas passage; 412. a diversion trench; 42. a motor housing; 5. a distance sleeve; 51. a cylindrical surface of the distance sleeve; 52. positioning the step surface; 53. spacing the cone table top; 54. spacing sleeve ring grooves; 6. a spacer sleeve; 61. a conical table top is sleeved at intervals; 62. a spacer sleeve groove; 7. a sealing seat; 71. an oil inlet channel axial section of the sealing seat; 72. an oil inlet passage inclined section of the sealing seat; 8a, an outer sealing cover plate; 8b, an inner sealing cover plate; 81. an outer annular wall; 82. an inner annular wall; 83. sealing the cover plate converging groove; 9. a motor stator; 10a, a sealing ring; 10b, sealing ring; 11. an oil inlet; 12. an oil return port; 13. an air inlet; 14. an air outlet; 15. a water inlet; 16. a water return port; 17. wave spring.
Detailed Description
It should be noted that, in the description herein, unless otherwise specified or defined, the terms "connected," "connected," and the like are to be construed broadly, and may be directly connected between two elements or indirectly connected through intermediaries, and the specific meaning of the terms may be understood by those skilled in the art according to circumstances.
Embodiments of the present utility model are described in further detail below, without limitation, with reference to the accompanying drawings.
As shown in fig. 1 and 2, the high-speed motor according to the embodiment of the present utility model includes a motor housing, a motor rotor 1 rotatably mounted to the motor housing through a bearing 2, and a motor stator 9 disposed between the motor housing and the motor rotor 1, wherein an inner ring of the bearing 2 is mounted to the motor rotor 1, an outer ring of the bearing 2 is mounted to a bearing housing 3, and the bearing housing 3 is mounted to the motor housing.
As shown in fig. 3, wherein the motor rotor 1 is designed as a split assembly structure, comprising: the permanent magnet 103 is arranged inside the non-magnetic closed cylinder body and is in tight fit with the closed cylinder body, one end of the front section shaft 101 is fixedly connected with one end of the closed cylinder body, and one end of the rear section shaft 105 is fixedly connected with the other end of the closed cylinder body. The permanent magnet 103 is located approximately in the middle of the motor, the front section shaft 101 is located approximately in the front of the motor (for the energy output of the motor), and the rear section shaft 105 is located approximately in the rear of the motor.
The permanent magnet 103 is approximately positioned in the middle of the motor rotor and is in a solid cylinder shape, the permanent magnet 103 is formed by compression sintering and magnetizing of rare earth permanent magnet materials in the prior art, and the permanent magnet has high magnetic energy product and good temperature resistance and can effectively improve the reliability of the motor.
The optimized structure of the closed cylinder is composed of a magnet protecting sleeve 104 and two magnetism isolating sheets 102, the magnetism isolating sheets 102 are round sheets, the magnet protecting sleeve 104 is in a hollow cylinder shape with two open ends, the magnetism isolating sheets 102 are mounted at two ends of the permanent magnet 103, and the magnet protecting sleeve 104 is mounted on the outer surfaces of the permanent magnet 103 and the magnetism isolating sheets 102 in an interference mode. The magnetism isolating sheet 102 and the magnet protecting sleeve 104 are made of non-magnetic conductive materials, so that the magnetic leakage of the permanent magnet can be reduced, and the performance of the permanent magnet can be improved. In addition, the magnetism isolating sheet 102 and the magnet protecting sleeve 104 are adopted as magnetism isolating structures, so that magnetism leakage can be effectively prevented, the front section shaft 101 and the rear section shaft 105 connected with the magnetism isolating sheet 102 and the magnet protecting sleeve 104 can be made of magnetic conducting materials, and the manufacturing cost of the front section shaft 101 and the rear section shaft 105 can be effectively reduced. The permanent magnet 103 is arranged inside the magnet protecting sleeve 104 in an interference manner, and a certain compressive stress is provided for the permanent magnet 103 in advance through the characteristic that the compressive strength of the permanent magnet 103 is high, so that the centrifugal force generated when a part of the rotor runs at a high speed can be balanced, the stress of the permanent magnet 103 is reduced, and the reliability of the motor rotor is improved.
The outer peripheral surfaces of the front section shaft 101 and the rear section shaft 105 at one end connected with the closed cylinder are provided with positioning bosses, the end face of the magnet protecting sleeve 104 is abutted against the positioning bosses and welded with the positioning bosses, and the welding connection between the two can ensure firm and reliable assembly of the whole motor rotor. The end surfaces of the front section shaft 101 and the rear section shaft 105 at the end connected with the closed cylinder are abutted against the magnetism isolating sheet 102.
Further, the front section shaft 101 and the rear section shaft 105 are all hollow structures at the inner parts of the ends, connected with the closed cylinder, of the front section shaft 101, a front hollow cavity A is formed by surrounding the hollow structure of the front section shaft 101 and the magnetism isolating sheet 102 abutted against the front section shaft, and a rear hollow cavity B is formed by surrounding the hollow structure of the rear section shaft 105 and the magnetism isolating sheet 102 abutted against the rear section shaft. The hollow structure reduces the rotational inertia of the motor rotor, is beneficial to the dynamic balance of the whole motor rotor, is beneficial to the miniaturization and light weight design of the motor rotor, and can effectively improve the transient response of the motor; on the other hand, the hollow structure can also effectively reduce the heat transfer of the heat of the motor to the bearing direction, reduce the working temperature of the bearing and improve the service life of the bearing.
When the motor rotor is manufactured, after the front section shaft 101, the rear section shaft 105 and the magnet protecting sleeve 104 are welded into a whole, the excircle is integrally processed to ensure that the dimension is consistent, thereby being beneficial to the dynamic balance of the whole motor rotor and improving the reliability of the motor. And after all the motor rotors are processed, carrying out dynamic balance test, and adopting a removal method to meet the dynamic balance requirement. After the dynamic balance test is finished, the permanent magnet is magnetized by a magnetizer, and the magnetic flux density distribution and the magnetic field intensity distribution after magnetization are tested until the set requirement is met.
According to the motor rotor, the permanent magnets are tightly bound in the closed cylinder body formed by the non-magnetic-conductive magnet protecting sleeve and the magnetic isolating sheets, so that the magnetic leakage of the permanent magnets can be effectively reduced, and the performance of the permanent magnets is improved; the permanent magnets are firmly and reliably installed, so that the motor rotor rotates at a high speed to generate a huge centrifugal force, the permanent magnets are not loosened, and the service life of the motor rotor is ensured; the permanent magnets are arranged in the closed cylinder body, so that the rotor has a relatively small radial size, small occupied space and simple structure, and the motor rotor is convenient to assemble and disassemble; the permanent magnet is mounted in the closed cylinder body to be effectively protected, a permanent magnet part with higher value in the motor rotor can be reserved during repair, and the permanent magnet can be detached for continuous use, so that the manufacturing and using costs are greatly reduced.
As shown in fig. 1 and 2, wherein the high-speed motor is provided with a heat dissipation system. The heat dissipation system of the high-speed motor comprises an oil cooling system, an air cooling system and a water cooling system.
Wherein, the oil cooling system includes: the bearing comprises a distance sleeve 5 and a distance sleeve 6 which are arranged on the motor rotor 1 and are respectively positioned on two sides of a bearing 2 and positioned on the inner ring of the bearing, wherein a lubricating oil chamber is defined by the distance sleeve 5, the distance sleeve 6 and a bearing seat 3, the bearing 2 is positioned in the lubricating oil chamber, and a bearing seat oil inlet passage and a bearing seat oil return passage 33 which are respectively communicated with the lubricating oil chamber are arranged in the bearing seat 3; the oil inlet 11 and the oil return port 12 are arranged on the motor shell, the oil inlet 11 is communicated with the bearing seat oil inlet channel, and the oil return port 12 is communicated with the bearing seat oil return channel 33.
As shown in fig. 2, the optimal design is that a bearing seat oil return channel 33 is positioned at the bottom of the bearing seat, and the inner wall of the bearing seat 3 is provided with a bearing seat converging groove 34 communicated with the bearing seat oil return channel 33; the bearing seat oil inlet channel comprises a bearing seat oil inlet channel radial section 31 and a bearing seat oil inlet channel axial section 32 which are communicated, and the oil inlet 11 is connected with the bearing seat oil inlet channel radial section 31.
Wherein, further, the both sides of lubrication oil chamber still are provided with sealed apron, for the convenience of description, are respectively noted as outside sealed apron 8a, inboard sealed apron 8b, and inboard sealed apron 8b is fixed in bearing frame 3 inboard, and outside sealed apron 8a sets up in seal seat 7, and seal seat 7 is fixed in the bearing frame 3 outside, and the contact surface of seal seat 7 and bearing frame 3 is provided with sealing washer 10a.
As shown in fig. 2 and 5, the sealing seat 7 is sleeved on the periphery of the distance sleeve 5, and a sealing seat oil inlet channel is further arranged in the sealing seat 7, so that the optimal design is that the bearing seat oil inlet channel is communicated with the lubricating oil chamber through the sealing seat oil inlet channel. The seal seat oil inlet passage comprises a seal seat oil inlet passage axial section 71 and a seal seat oil inlet passage inclined section 72 which are communicated, the seal seat oil inlet passage axial section 71 is connected with the bearing seat oil inlet passage axial section 32, and the seal seat oil inlet passage inclined section 72 is communicated with the lubricating oil chamber.
As shown in fig. 8, and referring to fig. 2, one end of the spacer 6 abuts against the bearing inner ring, the other end of the spacer 6 abuts against the shaft shoulder, a spacer cone table 61 is provided on the periphery of the spacer 6, and the small diameter end of the spacer cone table 61 is adjacent to the bearing inner ring. Further, a spacer sleeve groove 62 is arranged at one end of the spacer sleeve 6 abutting against the shaft shoulder, the spacer sleeve groove 62 is positioned outside the shaft shoulder, and the spacer sleeve groove 62 is used for being connected with the inner sealing cover plate 8b in a clamping mode.
As shown in fig. 7, and referring to fig. 2, the outer peripheral surface of the distance sleeve 5 is sequentially provided with a distance sleeve cylindrical surface 51, a positioning step surface 52 and a distance sleeve conical table surface 53, and the bearing inner ring is mounted on the distance sleeve cylindrical surface 51 (so that the bearing 2 is easy to mount and dismount, wear is reduced), and abuts against the positioning step surface 52, and the small diameter end of the distance sleeve conical table surface 53 is adjacent to the bearing inner ring. Further, a spacer ring groove 54 is provided on the end face of the large diameter end of the spacer sleeve 5, and the spacer ring groove 54 is used for being connected with the outer sealing cover plate 8a in a clamping manner.
The spacing sleeve 6 and the distance sleeve 5 have simple structures and ingenious design conception. On one hand, the positioning function is realized on the bearing inner ring, and the axial movement is prevented; on the other hand, the spacer taper surface 61, the spacer taper surface 53 and the bearing housing 3 together enclose a lubrication oil chamber, the bearing 2 is immersed in the lubrication oil chamber, and the spacer taper surface 61 and the spacer taper surface 53 form an oil thrower having an inclined surface structure when rotating at high speed. Compared with the traditional grease lubrication mode, the circulating lubricating oil can timely take away heat of the bearing and nearby parts, so that the bearing keeps allowable working temperature, the highest running rotating speed, reliability and service life of the bearing are improved, and the high-speed rotating requirement of the high-speed motor is met.
As shown in fig. 6, and referring to fig. 2, further, the end face of the large diameter end of the distance sleeve 5 is abutted against the sealing sleeve 4, the outer circumferential surface of the sealing sleeve 4 is provided with a sealing sleeve ring groove, a sealing ring 10b is arranged in the sealing sleeve ring groove, and an outer sealing cover plate 8a abuts against the sealing ring 10b to provide reliable guarantee for effective sealing of the bearing lubricating oil chamber.
As shown in fig. 4 and 5, and referring to fig. 2, an outer annular wall 81 and an inner annular wall 82 are arranged on one side of the sealing cover plate facing the bearing 2, a sealing cover plate converging groove 83 is formed between the inner annular wall 82 and the outer annular wall 81, and a sealing cover plate step surface is formed between the outer annular wall 81 and the outer peripheral surface of the sealing cover plate; the contact surface between the sealing seat 7 and the outer sealing cover plate 8a is a sealing seat step surface, and labyrinth seal is formed between the sealing seat step surface and the sealing cover plate step surface; the contact surface between the bearing seat 3 and the inner sealing cover plate 8b is set to be a bearing seat step surface, and labyrinth seal is formed between the bearing seat step surface and the sealing cover plate step surface. Further, the end of the inner annular wall 82 of the sealing cover plate is provided with a clamping protrusion, the clamping protrusion of the outer sealing cover plate 8a is clamped with the distance sleeve annular groove 54 of the distance sleeve 5, and the clamping protrusion of the inner sealing cover plate 8b is clamped with the distance sleeve annular groove 62 of the distance sleeve 6. The motor rotor 1 is provided with a rotor ring groove, the rotor ring groove is provided with a sealing ring 10b, and an inner side sealing cover plate 8b abuts against the sealing ring 10b, so that reliable guarantee is provided for effective sealing of a bearing lubricating oil chamber.
In the embodiment of the utility model, the lubricating oil chamber is surrounded by the distance sleeve, the distance sleeve and the bearing seat, and the arrangement of the sealing cover plate and the sealing seat creates a premise for forming good sealing for the lubricating oil chamber, so that the lubricating oil chamber can be effectively prevented from leaking oil, and the sealing property and the negative pressure resistance of the bearing are improved; the sealing sleeve is sealed with the outer sealing cover plate through a sealing ring, the outer sealing cover plate is sealed with the sealing seat through a labyrinth, and the sealing seat is sealed with the bearing seat through a sealing ring; the inner side sealing cover plate is sealed with the bearing seat through a labyrinth seal, and the inner side sealing cover plate is sealed with the motor rotor through a sealing ring; the arrangement of multiple seals ensures the tightness and negative pressure resistance of the bearing lubrication cooling system of the high-speed motor, thereby greatly improving the reliability and service life of the high-speed motor.
The bearing 2 is preferably a high-speed ball bearing, for example, a 6004-2RSLTN9/HC5C3WT type high-speed bearing of SKF company, the rotating speed is up to 70000r/min, the balls are made of ceramic materials, the wear resistance is good, the oil lubrication is suitable, the ball bearing and the distance sleeve are assembled in a gapless way, the service life of the ball bearing can be prolonged, and meanwhile, the installation and the balance are easy.
The bearing close to the output end of the high-speed motor is recorded as a positioning end bearing, the bearing at the other end far away from the output end is recorded as a floating end bearing, the two sets of bearings bear radial load of the motor together, and meanwhile, the positioning end bearing also bears partial axial load of the motor. When the floating end bearing is installed, the wave spring 17 is installed at the outer ring of the bearing, so that noise and vibration of the motor can be reduced.
In the above-mentioned oil cooling system, when the high-speed motor works (for example, the high-speed motor is used on an electric compressor as a driving motor for driving the impeller of the compressor, the electric compressor is applied to an engine, and lubricating oil of the engine lubricating system is utilized), the lubricating oil enters the lubricating oil chamber along the oil inlet 11, the bearing seat oil inlet channel and the sealing seat oil inlet channel, and after the bearing 2 is lubricated, cooled and cooled, a part of the lubricating oil flows out along the bearing seat sink 34, the bearing seat oil return channel 33 and the oil return port 12. The other part of lubricating oil is thrown to the side wall of the sealing cover plate by the oil thrower with the inclined surface structure under the action of rotary centrifugal force, and the lubricating oil at the side wall flows to the sealing cover plate converging groove 83 under the action of gravity and then is converged to the oil return port 12 along the bearing seat converging groove 34. Very little lubricating oil can flow to the joint of the distance sleeve or the sealing sleeve and the sealing cover plate, the oil quantity of the lubricating oil flowing to the sealing ring 10b can be reduced under the centrifugal force and the labyrinth sealing effect, and finally the lubricating oil is sealed by the sealing ring 10 b. The arrangement of multiple seals improves the tightness and negative pressure resistance of the bearing lubricating oil chamber, and creates preconditions for bearing lubrication and cooling. The circularly flowing lubricating oil can lubricate the bearing and timely take away heat of the bearing and nearby parts, reduce the temperature of the bearing, enable the bearing to keep allowable working temperature, improve the highest running speed, reliability and service life of the bearing, and further improve the reliability and service life of the high-speed motor.
As shown in fig. 1 and 2, the air cooling system includes: the air inlet 13 and the air outlet 14 are arranged on the motor shell and are respectively communicated with the inner cavity of the motor.
For convenience of description, the output end of the high-speed motor is denoted as a front end, the other end far away from the output end is denoted as a rear end, the front end has higher heat dissipation requirement than the rear end, and the air inlet 13 is optimally designed to be arranged close to the front end, and the air outlet 14 is arranged close to the rear end; a bearing seat mounting plate is arranged in the front end of the motor shell, an air passage 411 is arranged on the bearing seat mounting plate, and an air inlet 13 is communicated with the inner cavity of the motor through the air passage 411. When the high-speed motor works (the air source can use the air source of the air compressor outlet of the electric air compressor to compress air, the air source can also be connected with the external air source, the air pressure is larger than the local atmospheric pressure), as shown by an arrow in fig. 2, the compressed air enters the motor from the air inlet 13, enters the inner cavity of the motor through the air channel 411, flows through the gap between the motor rotor 1 and the motor stator 9, is discharged from the air outlet 14, and timely takes away the heat of the motor internal parts such as the motor stator 9, the motor rotor 1 and the like, and carries out heat dissipation and cooling on the motor internal parts such as the motor stator 9, the motor rotor 1 and the like.
As shown in fig. 1 and 2, the motor housing is optimally designed to include a motor inner housing 41 and a motor outer housing 42 which are combined together, a cooling water cavity is formed between the motor inner housing 41 and the motor outer housing 42, a spiral diversion trench 412 positioned in the cooling water cavity is further arranged on the motor inner housing 41, and a sealing ring 10a is arranged at the joint surface of the motor inner housing 41 and the motor outer housing 42. Wherein, the water cooling system includes: a water inlet 15 and a water return port 16 which are arranged on the motor shell 42 and are respectively communicated with the cooling water cavity; the optimization design is that the water inlet 15 is arranged near the front end of the high-speed motor, and the water return opening 16 is arranged near the rear end of the high-speed motor.
When the high-speed motor works (for example, the high-speed motor is used on an electric compressor as a driving motor for driving an impeller of the compressor, the electric compressor is applied to an engine, and cooling water of a water cooling system of the engine is utilized), cooling water enters a cooling water cavity from a water inlet 15 and flows out from a water return port 16; the heat transferred to the motor inner shell 41 by the motor stator 9 is taken away in time through water circulation, and the motor inner shell 41 and the motor stator 9 are subjected to heat dissipation and cooling.
According to the high-speed motor disclosed by the embodiment of the utility model, the heat dissipation system comprehensively adopts various heat dissipation means, the oil cooling system focuses on heat dissipation and cooling of parts such as a bearing and the like, the air cooling system focuses on heat dissipation and cooling of parts inside the motor such as a motor stator and a motor rotor, the water cooling system focuses on heat dissipation and cooling of the motor inner shell and the motor stator, each part of the high-speed motor can be effectively dissipated, the whole motor is comprehensively cooled, the heat dissipation efficiency is high, the problem that the rotation speed is limited and the motor cannot run for a long time due to temperature rise is solved, and the reliability and the service life of the high-speed motor are improved.
The foregoing is illustrative of the preferred embodiments of the present utility model, and all parts not specifically mentioned are known in the art, and the scope of the present utility model is defined by the appended claims.
Claims (10)
1. The high-speed motor, the high-speed motor include motor housing, through the bearing with motor housing rotates the motor rotor of installation, set up in motor housing with motor stator between the motor rotor, the bearing inner race of bearing install in motor rotor, the bearing outer lane of bearing is installed in the bearing frame, the high-speed motor is provided with cooling system, its characterized in that, motor rotor includes:
the permanent magnet is arranged in the non-magnetic closed cylinder body, and is tightly matched with the closed cylinder body;
the front section shaft, one end of the front section shaft is fixedly connected with one end of the closed cylinder;
one end of the rear section shaft is fixedly connected with the other end of the closed cylinder;
the front section shaft, the permanent magnet and the rear section shaft are coaxially arranged.
2. The high-speed motor according to claim 1, wherein the closed cylinder comprises magnetic isolating sheets arranged at two ends of the permanent magnet, and a magnet protecting sleeve which is arranged on the outer surfaces of the permanent magnet and the magnetic isolating sheets in an interference manner; the permanent magnet is a solid cylinder, the magnetism isolating sheet is a round sheet, and the magnet protecting sleeve is a hollow cylinder with two open ends.
3. The high-speed motor according to claim 2, wherein the inside of the end, connected with the closed cylinder, of the front section shaft and the rear section shaft is provided with a hollow structure, and a hollow inner cavity is formed between the hollow structure and the closed cylinder.
4. The high speed electric machine of claim 1, wherein the heat dissipation system comprises an oil cooling system comprising:
the spacer sleeve and the distance sleeve are respectively positioned at two sides of the bearing and are used for positioning the bearing inner ring, the lubricating oil chamber is enclosed by the spacer sleeve, the distance sleeve and the bearing seat, the bearing is positioned in the lubricating oil chamber, and a bearing seat oil inlet passage and a bearing seat oil return passage which are respectively communicated with the lubricating oil chamber are arranged in the bearing seat;
the oil inlet is communicated with the bearing seat oil inlet channel, and the oil return port is communicated with the bearing seat oil return channel.
5. The high-speed motor according to claim 4, wherein one end of the spacer sleeve is abutted against the bearing inner ring, the other end of the spacer sleeve is abutted against the shaft shoulder, a spacer sleeve conical table surface is arranged on the periphery of the spacer sleeve, and the small-diameter end of the spacer sleeve conical table surface is adjacent to the bearing inner ring; the outer peripheral surface of the distance sleeve is sequentially provided with a distance sleeve conical table surface, a positioning step surface and a distance sleeve cylindrical surface, the bearing inner ring is arranged on the distance sleeve cylindrical surface and abuts against the positioning step surface, and the small-diameter end of the distance sleeve conical table surface is adjacent to the bearing inner ring.
6. The high-speed motor according to claim 5, wherein a spacer sleeve ring groove is formed in one end of the spacer sleeve, which abuts against the shaft shoulder, the spacer sleeve ring groove is positioned outside the shaft shoulder, an inner sealing cover plate is arranged on the inner side of the lubricating oil chamber, and the inner sealing cover plate is clamped with the spacer sleeve ring groove; the end face of the large-diameter end of the distance sleeve is provided with a distance sleeve ring groove, the outer side of the lubricating oil chamber is provided with an outer sealing cover plate, and the outer sealing cover plate is clamped with the distance sleeve ring groove.
7. The high-speed motor of claim 4, wherein the bearing seat oil inlet passage comprises a bearing seat oil inlet passage radial section and a bearing seat oil inlet passage axial section which are communicated, and the oil inlet is connected with the bearing seat oil inlet passage radial section;
the outer side of the bearing seat is provided with a sealing seat, the sealing seat is sleeved on the periphery of the distance sleeve, a sealing seat oil inlet channel is arranged in the sealing seat, the sealing seat oil inlet channel comprises a sealing seat oil inlet channel axial section and a sealing seat oil inlet channel inclined section which are communicated, the sealing seat oil inlet channel axial section is connected with the bearing seat oil inlet channel axial section, and the sealing seat oil inlet channel inclined section is communicated with the lubricating oil chamber;
the bearing seat oil return channel is positioned at the bottom of the bearing seat, and the inner wall of the bearing seat is provided with a bearing seat converging groove communicated with the bearing seat oil return channel.
8. The high speed motor of claim 1, wherein the heat dissipation system further comprises an air cooling system comprising: the air inlet and the air outlet are arranged on the motor shell and are respectively communicated with the inner cavity of the motor;
the output end of the high-speed motor is marked as a front end, the other end far away from the front end is marked as a rear end, the air inlet is close to the front end, and the air outlet is close to the rear end; the motor is characterized in that a bearing seat mounting plate is arranged inside the front end of the motor shell, an air passing channel is arranged on the bearing seat mounting plate, and the air inlet is communicated with the inner cavity of the motor through the air passing channel.
9. The high speed motor of claim 1, wherein the heat dissipation system further comprises a water cooling system comprising: the motor shell comprises a motor inner shell and a motor outer shell which are combined together, the cooling water cavity is formed between the motor inner shell and the motor outer shell, and the water inlet and the water return port are arranged on the motor outer shell and are respectively communicated with the cooling water cavity; the water inlet is close to the front end of the high-speed motor, and the water return port is close to the rear end of the high-speed motor.
10. The high-speed motor of claim 9, wherein the cooling water chamber is provided therein with a flow guide groove.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320658834.6U CN219287256U (en) | 2023-03-27 | 2023-03-27 | High-speed motor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202320658834.6U CN219287256U (en) | 2023-03-27 | 2023-03-27 | High-speed motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116865491A (en) * | 2023-09-05 | 2023-10-10 | 潍坊力创电子科技有限公司 | Mechanical energy storage structure mounted on motor shaft |
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2023
- 2023-03-27 CN CN202320658834.6U patent/CN219287256U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116865491A (en) * | 2023-09-05 | 2023-10-10 | 潍坊力创电子科技有限公司 | Mechanical energy storage structure mounted on motor shaft |
| CN116865491B (en) * | 2023-09-05 | 2023-11-14 | 潍坊力创电子科技有限公司 | Mechanical energy storage structure mounted on motor shaft |
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