Integrated high-speed motor rotor

Abstract

The utility model relates to a kind of integrated high-speed motor rotor applied to field, including rotor body, rotor body includes installation shaft, installation shaft is hollow structure, the outer surface of installation shaft is fixedly covered with sheath, permanent magnet is inlaid in sheath inside, the outer surface of installation shaft is also installed with rotational speed sensor and distance sensor, the outer surface of installation shaft is excavated with two groups of air grooves, two groups of air grooves are located at the both sides of sheath respectively, and heat dissipation component is equipped in rotor body, the inside of rotor is heat dissipated by the double heat dissipation mode of gas and liquid, liquid is in accommodating tube, fluid circulation is realized by outer waterway and inner waterway, heat at the outside permanent magnet is exchanged to liquid, then flows into inner waterway, and fully contacts with cold wind in gas passage, effectively improve the heat dissipation effect of permanent magnet part, effectively avoid high temperature to cause permanent magnet lose magnetism, improve the stability when rotor rotates.

Description

Technical Field

[0001] This utility model relates to a motor rotor, and more particularly to an integrated high-speed motor rotor used in the field of motor rotor. Background Technology

[0002] Traditional motor rotors are supported by mechanical bearings, which inevitably limit the bearing speed at high speeds. At the same time, additional mechanical friction losses increase significantly with the increase in speed, greatly affecting the efficiency and reliability of motor operation. Improving motor speed and stability is a key issue that needs to be addressed in motor application fields, which is precisely the application scope of magnetic levitation motor rotors.

[0003] Chinese Patent Publication No. CN219760785U discloses a magnetic levitation motor rotor and a magnetic levitation motor. This utility model sets a balance disc that rotates concentrically with the shaft on the end face of the shaft. When the motor rotor rotates at high speed, the balance disc on the end face can transmit the axial force to the magnetic levitation bearing more completely. Moreover, the end faces of both ends of the shaft are equipped with balance discs, so that the magnetic levitation bearing can simultaneously control the reverse thrust of the bearings at both ends when the magnetic levitation bearing is running, so as to achieve the effect of balancing the axial thrust and thus improve the stability of the magnetic levitation motor rotor.

[0004] Although there is no mechanical contact between the rotor and the magnetic levitation motor rotor during operation, the rotor will inevitably rub against the air when rotating at high speed, which will generate heat. High temperature may cause the permanent magnet to lose its magnetism, thus causing the rotor to become unstable. Utility Model Content

[0005] The technical problem that this utility model aims to solve in view of the above-mentioned prior art is that the rotor of the magnetic levitation motor will rub against the air when it is running at high speed, thereby generating heat. High temperature may cause the permanent magnet to lose its magnetism, which in turn causes the rotor to become unstable.

[0006] To address the aforementioned issues, this utility model provides an integrated high-speed motor rotor, comprising a rotor body, a mounting shaft with a hollow structure, a protective sleeve fixedly fitted on the outer surface of the mounting shaft, a permanent magnet embedded inside the protective sleeve, a speed sensor and a distance sensor mounted on the outer surface of the mounting shaft, two sets of ventilation grooves chiseled on the outer surface of the mounting shaft located on opposite sides of the protective sleeve, a heat dissipation assembly within the rotor body, the heat dissipation assembly including a receiving tube fixedly connected to the inner wall of the mounting shaft, an isolation tube fixedly connected to the inner cavity of the receiving tube, an outer water channel fixedly fitted on the outer annular surface of the isolation tube, and an inner water channel fixedly connected to the inner annular surface of the isolation tube, two circulation holes chiseled on the outer surface of the receiving tube, a mounting rod movably penetrating through the left side of the receiving tube, a gas channel fixedly fitted on the outer surface of the mounting rod, and positioning plates fixedly connected to both ends of the mounting rod, the outer annular surface of the positioning plates being fixedly connected to the inner wall of the mounting shaft.

[0007] In the aforementioned integrated high-speed motor rotor, heat is dissipated from the inside of the rotor through a dual heat dissipation method of gas and liquid. The liquid in the containment tube circulates through the outer and inner water channels, exchanging heat from the external permanent magnets into the liquid, and then flows into the inner water channel, where it comes into full contact with the cold air in the gas channel. This effectively improves the heat dissipation effect of the permanent magnets, effectively prevents the permanent magnets from losing their magnetism due to high temperatures, and improves the stability of the rotor during rotation.

[0008] As a further improvement of this application, the length of the receiving tube is the same as the length of the sheath, and the receiving tube is located inside the sheath.

[0009] As a further improvement to this application, the outer water channel, the inner water channel, and the gas channel are all spiral-shaped, with the outer water channel and the inner water channel rotating in opposite directions.

[0010] As a further improvement of this application, two circulation holes are located on both sides of the isolation tube, and nanofluid is provided inside the accommodating tube.

[0011] As another improvement of this application, both positioning plates are located between two sets of ventilation slots, and multiple ventilation holes are drilled on the surface of the positioning plates.

[0012] As another improvement of this application, the inner wall of the mounting shaft is also fixedly connected with multiple heat dissipation fins, which are arranged in a ring array around the central axis of the mounting shaft, and the multiple heat dissipation fins are located on both sides of the receiving tube.

[0013] In summary, in practical applications, cold air enters the rotor body through a set of ventilation slots, increases the gas flow rate through gas channels, and then exits through another set of ventilation slots onto the mounting shaft, dissipating heat from the gas inside the mounting shaft. When the rotor body rotates at high speed, centrifugal force is generated, causing the nanofluid in the containment tube to circulate in the inner and outer water channels. The nanofluid in the outer water channel dissipates heat from the permanent magnet through heat exchange during its flow. When the nanofluid circulates into the inner water channel, the cold air dissipates heat from the nanofluid within the inner water channel, thereby effectively improving the heat dissipation effect of the permanent magnet, effectively preventing the permanent magnet from losing its magnetism due to high temperature, and improving the stability of the rotor during rotation. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the first embodiment of this application;

[0015] Figure 2 This is a structural cross-sectional view of the first embodiment of this application;

[0016] Figure 3 This is a schematic diagram of the gas channel structure according to the first embodiment of this application;

[0017] Figure 4 This is a cross-sectional view of the receiving tube structure according to the first embodiment of this application;

[0018] Figure 5 This is a schematic diagram of the isolation tube structure according to the first embodiment of this application;

[0019] Figure 6 This is a schematic diagram of the positioning plate structure according to the first embodiment of this application;

[0020] Figure 7 This is a cross-sectional view of the structure of the second embodiment of this application.

[0021] Explanation of the labels in the diagram:

[0022] 1 Rotor body, 101 Mounting shaft, 102 Sheath, 103 Permanent magnet, 104 Speed ​​sensor, 105 Distance sensor, 106 Ventilation slot, 107 Heat sink fins, 2 Containing tube, 3 Isolation tube, 4 External water channel, 5 Internal water channel, 6 Circulation hole, 7 Mounting rod, 8 Gas channel, 9 Positioning plate. Detailed Implementation

[0023] The two embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0024] First implementation method:

[0025] Figure 1 and Figure 2 The diagram shows an integrated high-speed motor rotor, comprising a rotor body 1, which includes a mounting shaft 101. The mounting shaft 101 is a hollow structure, and a protective sleeve 102 is fixedly fitted onto its outer surface. A permanent magnet 103 is embedded inside the protective sleeve 102. A speed sensor 104 and a distance sensor 105 are also mounted on the outer surface of the mounting shaft 101. Those skilled in the art can select a suitable model of distance sensor 105, such as LTP150, and a suitable model of speed sensor 104, such as SPI3, according to actual needs. The outer surface of the mounting shaft 101 is chiseled. There are two sets of ventilation slots 106, which are located on both sides of the sheath 102. When the rotor body 1 rotates, the permanent magnet 103 prevents the rotor body 1 from contacting the magnetic levitation bearing. The speed sensor 104 can monitor the speed of the rotor body 1 in real time, and the distance sensor 105 can monitor the distance between the rotor body 1 and the magnetic levitation bearing. If the distance changes, it means that the rotor body 1 has deviated during rotation. At this time, the external bearing controller increases the repulsive force of the tilted part to correct the rotor body 1. The magnetic levitation bearing and the bearing controller are existing technologies and will not be described in detail here.

[0026] Figure 2, Figure 3 , Figure 4 , Figure 5 and Figure 6 The rotor body 1 is equipped with a heat dissipation assembly, which includes a receiving tube 2 fixedly connected to the inner wall of the mounting shaft 101. The length of the receiving tube 2 is the same as the length of the sheath 102, so that the permanent magnet 103 can be fully cooled when the fluid circulates. The receiving tube 2 is located inside the sheath 102. An isolation tube 3 is fixedly connected to the inner cavity of the receiving tube 2. The isolation tube 3 is used to isolate the outer water channel 4 and the inner water channel 5. The outer water channel 4 is fixedly sleeved on the outer ring surface of the isolation tube 3, and the inner water channel 5 is fixedly connected to the inner ring surface of the isolation tube 3. Two circulation holes 6 are drilled on the outer surface of the receiving tube 2. Under the action of centrifugal force, the nanofluid in the receiving tube 2 circulates inside the outer water channel 4 and the inner water channel 5, and the circulation holes 6 allow the nanofluid to circulate. The air flows back and forth between the outer water channel 4 and the inner water channel 5. Two circulation holes 6 are located on both sides of the isolation tube 3. The accommodating tube 2 contains nanofluid. The left side of the accommodating tube 2 is movably connected to the mounting rod 7. The outer surface of the mounting rod 7 is fixedly fitted with a gas channel 8, and both ends of the mounting rod 7 are fixedly connected to positioning plates 9. The outer ring surface of the positioning plate 9 is fixedly connected to the inner wall of the mounting shaft 101. Both positioning plates 9 are located between two sets of ventilation slots 106. Multiple ventilation holes are drilled on the surface of the positioning plate 9. Cold air can enter the interior of the rotor body 1 through one set of ventilation slots 106, increase the gas flow rate through the gas channel 8, and then be discharged from the mounting shaft 101 through the other set of ventilation slots 106 to dissipate gas heat inside the mounting shaft 101.

[0027] When the rotor body 1 rotates, the motor is usually equipped with an internal air-cooling structure. Cold air enters the motor and enters the rotor body 1 through a set of ventilation slots 106. The air flow rate is increased through the gas channel 8, and then discharged through another set of ventilation slots 106 to the mounting shaft 101, thus dissipating gas heat inside the mounting shaft 101. When the rotor body 1 rotates at high speed, centrifugal force is generated, causing the nanofluid in the containment tube 2 to circulate in the inner water channel 5 and the outer water channel 4. During the flow, the nanofluid in the outer water channel 4 dissipates heat to the permanent magnet 103 through heat exchange. When the nanofluid circulates to the inner water channel 5, the nanofluid in the inner water channel 5 is dissipated by the cold air, thereby effectively improving the heat dissipation effect of the permanent magnet 103, effectively preventing the permanent magnet 103 from losing its magnetism due to high temperature, and improving the stability of the rotor during rotation.

[0028] Second implementation method:

[0029] This embodiment adds a heat dissipation fin 107 to the first embodiment, while the rest remains the same as the first embodiment.

[0030] Figure 7As shown, multiple heat dissipation fins 107 are also fixedly connected to the inner wall of the mounting shaft 101. The multiple heat dissipation fins 107 are arranged in a ring array around the central axis of the mounting shaft 101, and the multiple heat dissipation fins 107 are located on both sides of the accommodating tube 2.

[0031] After the cold air enters the mounting shaft 101, the heat dissipation fins 107 increase the contact area between the inner wall of the mounting shaft 101 and the cold air, thereby effectively improving the heat dissipation effect.

[0032] In light of current practical needs, the above-described embodiments adopted in this application are not limited to these. Any changes made within the scope of knowledge possessed by those skilled in the art without departing from the concept of this application still fall within the protection scope of this utility model.

Claims

1. An integrated high-speed motor rotor, comprising a rotor body (1), characterized in that: The rotor body (1) includes a mounting shaft (101), which is a hollow structure. A protective sleeve (102) is fixedly fitted on the outer surface of the mounting shaft (101). A permanent magnet (103) is embedded inside the protective sleeve (102). A speed sensor (104) and a distance sensor (105) are also installed on the outer surface of the mounting shaft (101). Two sets of ventilation grooves (106) are carved on the outer surface of the mounting shaft (101). The two sets of ventilation grooves (106) are located on both sides of the protective sleeve (102). The rotor body (1) is provided with a heat dissipation assembly, which includes a receiving tube (2) fixedly connected to the inner wall of the mounting shaft (101). An isolation tube (3) is fixedly connected to the inner cavity of the receiving tube (2). An outer water channel (4) is fixedly sleeved on the outer ring surface of the isolation tube (3), and an inner water channel (5) is fixedly connected to the inner ring surface of the isolation tube (3). Two circulation holes (6) are drilled on the outer surface of the receiving tube (2). An installation rod (7) is movably passed through the left side of the receiving tube (2). An air channel (8) is fixedly sleeved on the outer surface of the installation rod (7), and a positioning plate (9) is fixedly connected to both the left and right ends of the installation rod (7). The outer ring surface of the positioning plate (9) is fixedly connected to the inner wall of the mounting shaft (101).

2. The integrated high-speed motor rotor according to claim 1, characterized in that: The length of the receiving tube (2) is the same as the length of the sheath (102), and the receiving tube (2) is located inside the sheath (102).

3. The integrated high-speed motor rotor according to claim 2, characterized in that: The outer waterway (4), the inner waterway (5), and the gas passage (8) are all spiral-shaped, and the outer waterway (4) and the inner waterway (5) have opposite spiral directions.

4. The integrated high-speed motor rotor according to claim 1, characterized in that: The two circulation holes (6) are located on both sides of the isolation tube (3), and the accommodating tube (2) contains nanofluid.

5. The integrated high-speed motor rotor according to claim 1, characterized in that: Both positioning plates (9) are located between two sets of ventilation slots (106), and the surface of the positioning plates (9) is drilled with multiple ventilation holes.

6. The integrated high-speed motor rotor according to claim 1, characterized in that: The inner wall of the mounting shaft (101) is also fixedly connected with a plurality of heat dissipation fins (107). The plurality of heat dissipation fins (107) are arranged in a ring array around the central axis of the mounting shaft (101), and the plurality of heat dissipation fins (107) are located on both sides of the accommodating tube (2).

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