Magnetic suspension rotor assembly and high-speed motor

Abstract

The utility model discloses a magnetic suspension rotor assembly and a high-speed motor. The magnetic suspension rotor assembly comprises a hydraulic bearing. The rotating shaft is movably arranged on the hydraulic bearing in a penetrating manner and is not in contact with the inner wall of the hydraulic bearing; the magnetic suspension mechanism is arranged on one side of the hydraulic bearing and connected with the rotating shaft, the magnetic suspension mechanism comprises a first fixed magnetic sheet and a second fixed magnetic sheet which are fixedly and oppositely arranged in parallel, and a gap is formed between the first fixed magnetic sheet and the second fixed magnetic sheet; the rotating magnetic sheet is movably arranged in the space and is fixedly connected with the rotating shaft; the rotor shell is movably arranged above the hydraulic bearing and is fixedly connected with the rotating shaft; and the magnetic ring is fixedly arranged on the inner wall of the rotor shell and penetrates through the rotating shaft. According to the utility model, the hydraulic bearing and the magnetic suspension mechanism are arranged, so that the problems of loud noise and short service life of the existing high-speed motor during rotation are effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of high-speed motors, and in particular to a magnetic suspension rotor assembly and a high-speed motor. Background Art

[0002] High-speed motors usually refer to motors with a speed exceeding 10,000 r / min, which have the following advantages: First, due to the high speed, the motor power density is high, and the volume is much smaller than that of ordinary power motors, which can effectively save materials; second, it can be connected to the prime mover, eliminating the traditional reduction mechanism, with high transmission efficiency and low noise; third, due to the small moment of inertia of the high-speed motor, the dynamic response is fast. As one of the important components of the high-speed motor, the bearing assembly generally includes a rotating shaft, a bearing sleeve, a bearing and a magnet, and the bearing assembly in the existing high-speed motor generally adopts a mechanical bearing. Since the rotating shaft rotates at a high speed on the bearing, there is mechanical friction between the rotating shaft and the bearing, so it will generate a large noise, and at the same time, the life of the high-speed motor is shortened; therefore, a magnetic suspension rotor assembly and a high-speed motor are provided to solve the problem that the existing high-speed motor has a large noise when rotating and a short life. Utility Model Content

[0003] One of the purposes of the utility model is to provide a magnetic suspension rotor assembly and a high-speed motor, so as to solve the problems of high noise and short life of the existing high-speed motor during rotation.

[0004] The utility model provides a magnetic suspension rotor assembly and a high-speed motor which can be realized by the following technical solutions:

[0005] The utility model discloses a magnetic suspension rotor assembly, comprising a hydraulic bearing, which is a hollow cylinder, in which lubricating oil is stored; a rotating shaft, which is movably arranged on the hydraulic bearing and does not contact the inner wall of the hydraulic bearing; a magnetic suspension mechanism, which is arranged on one side of the hydraulic bearing and is connected to the rotating shaft, so that the rotating shaft is suspended and is arranged on the hydraulic bearing; a rotor shell, which is movably arranged above the hydraulic bearing and fixedly connected to the rotating shaft; a magnetic ring, which is fixedly arranged on the inner wall of the rotor shell and passes through the rotating shaft; wherein the magnetic suspension mechanism comprises a first fixed magnetic sheet and a second fixed magnetic sheet fixedly arranged in parallel with each other, with a gap between the two; a rotating magnetic sheet movably arranged in the gap and fixedly connected to the rotating shaft, the first fixed magnetic sheet and the second fixed magnetic sheet respectively repel each other with the rotating magnetic sheet.

[0006] In one embodiment, a through hole is provided at the center of the hydraulic bearing, and an oil storage tank is provided in the middle of the through hole.

[0007] In one embodiment, a plurality of oil grooves are provided on the upper and lower sides of the inner wall of the through hole, and the oil grooves are in a herringbone shape and contain lubricating oil.

[0008] In one embodiment, the first fixed magnetic sheet has an S pole on the top and an N pole on the bottom; the second fixed magnetic sheet has an S pole on the top and an N pole on the bottom; the rotating magnetic sheet has an N pole on the top and an S pole on the bottom; the first fixed magnetic sheet and the second fixed magnetic sheet repel each other with the rotating magnetic sheet respectively.

[0009] In one embodiment, the first fixed magnetic sheet has an N pole on the top and an S pole on the bottom; the second fixed magnetic sheet has an N pole on the top and an S pole on the bottom; the rotating magnetic sheet has an S pole on the top and an N pole on the bottom; the first fixed magnetic sheet and the second fixed magnetic sheet repel each other with the rotating magnetic sheet respectively.

[0010] In one embodiment, the first fixed magnetic sheet, the second fixed magnetic sheet and the rotating magnetic sheet are all made of sintered NdFeB.

[0011] A high-speed motor comprises the magnetic suspension rotor assembly and a stator assembly as described in any one of the above items; the magnetic suspension rotor assembly is movably arranged on the stator assembly.

[0012] In one embodiment, the stator assembly includes a bracket, which is a hollow cavity; a stator mechanism fixedly arranged on the outside of the bracket, and the magnetic ring is movably arranged around the stator mechanism; and a connecting wire fixedly arranged on the side of the bracket and electrically connected to the stator mechanism.

[0013] In one embodiment, the stator mechanism includes a stator core and a stator winding, the stator core is fixedly disposed in the bracket, and the stator winding is disposed on the stator core.

[0014] In one embodiment, the hydraulic bearing and the magnetic suspension mechanism are respectively arranged in the bracket.

[0015] Compared with the prior art, the beneficial effects of the magnetic suspension rotor assembly and high-speed motor of the utility model are as follows:

[0016] The utility model discloses a magnetic suspension rotor assembly and a high-speed motor, which drives the movement of lubricating oil in a plurality of oil grooves through a rotating shaft. The lubricating oil converges and moves from the two side ends of the herringbone oil groove to the vertex thereof. When the lubricating oil reaches the vertex of the herringbone oil groove, the lubricating oil forms a high oil pressure at the vertex, and the rotating shaft is lifted by a plurality of high oil pressures in a through hole, so that the rotating shaft and the hydraulic bearing rotate at a high speed without contact through the action of the lubricating oil, and there is no contact friction of mechanical parts, so that the noise of the high-speed motor becomes smaller, and the wear of the parts is smaller, so that the service life of the high-speed motor is prolonged; at the same time, by arranging a magnetic suspension mechanism, the rotating magnetic sheet is suspended under the action of magnetic force through the action of like-sex repulsion by two fixed magnetic sheets, so that the motor axial direction is free of friction and movement, and the problem of high noise and short service life of the existing high-speed motor during rotation is effectively solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a structural schematic diagram of a magnetic suspension rotor assembly of the utility model;

[0019] Figure 2 yes Figure 1 The cross-sectional structure diagram of a magnetic suspension rotor assembly of the utility model is shown;

[0020] Figure 3 yes Figure 1 The exploded structural diagram of a magnetic suspension rotor assembly of the utility model is shown, including a hydraulic bearing;

[0021] Figure 4 yes Figure 3 Schematic diagram of the exploded structure of the hydraulic bearing shown;

[0022] Figure 5 This is a structural schematic diagram of a high-speed motor of the utility model;

[0023] Figure 6 yes Figure 5 The cross-sectional structure diagram of a high-speed motor of the utility model is shown;

[0024] Figure 7 yes Figure 5 The utility model is a schematic diagram of the exploded structure of a high-speed motor.

[0025] Indications in the figure: 10, magnetic levitation rotor assembly; 11, hydraulic bearing; 111, through hole; 1111, oil storage tank; 1112, oil tank; 12, rotating shaft; 13, magnetic levitation mechanism; 131, first fixed magnetic sheet; 132, second fixed magnetic sheet; 133, rotating magnetic sheet; 14, rotor housing; 15, magnetic ring; 20, stator assembly; 21, bracket; 22, stator mechanism; 23, connecting wires. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a partial embodiment of the utility model, not all embodiments. Generally, the components of the embodiment of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figure 1-Figure 3 As shown, the utility model is a magnetic suspension rotor assembly 10, comprising a hydraulic bearing 11, a rotating shaft 12, a magnetic suspension mechanism 13, a rotor housing 14 and a magnetic ring 15; the hydraulic bearing 11 is a hollow cylinder; the rotating shaft 12 is movably arranged on the hydraulic bearing 11 and does not contact the inner wall of the hydraulic bearing 11; the magnetic suspension mechanism 13 is arranged on one side of the hydraulic bearing 11 and connected to the rotating shaft 12, so that the rotating shaft 12 is suspended and passes through the hydraulic bearing 11; the rotor housing 14 is movably arranged above the hydraulic bearing 11 and fixedly connected to the rotating shaft 12; the magnetic ring 15 is in the shape of a hollow ring, which is fixedly arranged on the inner wall of the rotor housing 14 and passes through the rotating shaft 12, and the magnetic ring 15 drives the rotor housing 14 to rotate.

[0029] See also Figure 1-Figure 4As shown, in this embodiment, a through hole 111 is provided at the center of the hydraulic bearing 11, and an oil storage tank 1111 is provided in the middle part of the through hole 111, and the oil storage tank 1111 can store some excess lubricating oil; a plurality of oil grooves 1112 are provided on the upper and lower sides of the inner wall of the through hole 111, and the oil grooves 1112 are in a herringbone shape and are provided with lubricating oil. When the rotating shaft 12 rotates at a high speed in the hydraulic bearing 11, the rotating shaft 12 drives the lubricating oil in the plurality of oil grooves 1112 to move, and the lubricating oil converges and moves from the two side ends of the herringbone oil grooves 1112 to the apex thereof. When the lubricating oil reaches the apex of the herringbone oil grooves 1112, the lubricating oil forms a high oil pressure at this apex, and the rotating shaft 12 is lifted up by the high oil pressures in the through hole 111, so that the rotating shaft 12 and the hydraulic bearing 11 rotate at a high speed in a non-contact state. In this embodiment, the hydraulic bearing 11 is made of copper, which is beneficial to the processing accuracy of the hydraulic bearing 11 and is also beneficial to the assembly of the high-speed motor.

[0030] See also Figure 1-Figure 3As shown, in this embodiment, the magnetic suspension mechanism 13 includes a first fixed magnetic piece 131, a second fixed magnetic piece 132 and a rotating magnetic piece 133; the first fixed magnetic piece 131 and the second fixed magnetic piece 132 are fixedly arranged in parallel and opposite to each other at the lower side of the hydraulic bearing 11, and a gap is arranged between the two; the rotating magnetic piece 133 is movably arranged in the gap between the first fixed magnetic piece 131 and the second fixed magnetic piece 132 and is fixedly connected to the rotating shaft 12, and the rotating shaft 12 passes through the hydraulic bearing 11, the first fixed magnetic piece 131, and the second fixed magnetic piece 132 in sequence, and the first fixed magnetic piece 131 and the second fixed magnetic piece 132 are respectively connected to the rotating magnetic piece 13 3 repel each other to generate repulsive force, so that the rotating magnetic piece 133 is suspended in the said spacing; specifically, the upper side of the first fixed magnetic piece 131 is an S pole, and the lower side thereof is an N pole; the upper side of the second fixed magnetic piece 132 is an S pole, and the lower side thereof is an N pole; the upper side of the rotating magnetic piece 133 is an N pole, and the lower side thereof is an S pole; the N pole at the lower side of the first fixed magnetic piece 131 and the N pole at the opposite side of the rotating magnetic piece 133 repel each other to generate repulsive force, and the S pole at the upper side of the second fixed magnetic piece 132 and the S pole at the opposite side of the rotating magnetic piece 133 repel each other to generate repulsive force, so that the upper and lower sides of the rotating magnetic piece 133 are subject to repulsive force, so that the rotating magnetic piece 133 is always in a non-contact magnetic suspension state. In other embodiments, the top of the first fixed magnetic piece 131 is an N pole, and the bottom thereof is an S pole; the top of the second fixed magnetic piece 132 is an N pole, and the bottom thereof is an S pole; the top of the rotating magnetic piece 133 is an S pole, and the bottom thereof is an N pole; the S pole below the first fixed magnetic piece 131 and the S pole on the opposite surface of the rotating magnetic piece 133 repel each other to generate a repulsive force, and the N pole above the second fixed magnetic piece 132 and the N pole on the opposite surface of the rotating magnetic piece 133 repel each other to generate a repulsive force, so that the upper and lower surfaces of the rotating magnetic piece 133 are subject to repulsive forces, so that the rotating magnetic piece 133 is always in a non-contact magnetic suspension state. Among them, the rotating magnetic sheet 133 is always in a non-contact magnetic suspension state. Since the rotating magnetic sheet 133 is fixedly connected to the rotating shaft 12, the rotating shaft 12 is fixedly connected to the rotor housing 14, and the rotor housing 14 is fixedly connected to the magnetic ring 15, the rotating shaft 12, the rotor housing 14, and the magnetic ring 15 are always in a non-contact magnetic suspension state, so that the axial movement of the magnetic suspension rotor assembly 10 is frictionless and does not move. In this embodiment, the materials of the first fixed magnetic sheet 131, the second fixed magnetic sheet 132 and the rotating magnetic sheet 133 are all sintered neodymium iron boron; the rotor housing 14 adopts a hollow cylindrical cavity, which is penetrated by a plurality of heat dissipation holes.

[0031] See also Figure 5-Figure 7As shown, a high-speed motor of the utility model comprises the magnetic suspension rotor assembly 10 and the stator assembly 20 as described in any one of the above items; the magnetic suspension rotor assembly 10 is movably arranged on the stator assembly 20 .

[0032] See also Figure 6 and Figure 7 As shown, in this embodiment, the stator assembly 20 includes a bracket 21, a stator mechanism 22 and a connecting wire 23; the bracket 21 is a hollow cavity, the hydraulic bearing 11 and the magnetic suspension mechanism 13 are respectively arranged in the bracket 21; the stator mechanism 22 is fixedly arranged on the outside of the bracket 21, and the magnetic ring 15 is movably surrounded on the stator mechanism 22; the connecting wire 23 is fixedly arranged on the side of the bracket 21 and is electrically connected to the stator mechanism 22. Specifically, the stator mechanism 22 includes a stator core and a stator winding, the stator core is fixedly arranged in the bracket 21, and the stator winding is arranged on the stator core.

[0033] It should be noted that the specific working process of the magnetic suspension rotor assembly and the high-speed motor of the utility model is as follows: the connecting wire 23 is energized to the stator winding, and the stator winding and the stator core generate a stator magnetic field under the action of the alternating current, and the stator magnetic field interacts with the magnetic ring 15, thereby driving the magnetic ring 15 to rotate, and the magnetic ring 15 in turn drives the rotor housing 14 and the rotating shaft 12 to rotate; when the rotating shaft 12 rotates in the hydraulic bearing 11, the pressure pushes the lubricating oil to the top of the herringbone oil groove 1112 of the hydraulic bearing 11, generating a greater pressure so that the rotating shaft 12 is always in contact with the hydraulic when rotating. The bearing 11 is separated and non-contacting. At the same time, when the rotating shaft 12 rotates, it drives the rotating magnetic piece 133 to rotate. The rotating magnetic piece 133 is always in a magnetic suspension state under the repulsive force of the first fixed magnetic piece 131 and the second fixed magnetic piece 132. Since the rotating magnetic piece 133 is fixedly connected to the rotating shaft 12, the rotating shaft 12 is fixedly connected to the rotor shell 14, and the rotor shell 14 is fixedly connected to the magnetic ring 15, the rotating shaft 12, the rotor shell 14, and the magnetic ring 15 are also always in a non-contact magnetic suspension state, so that the axial movement of the magnetic suspension rotor assembly 10 is frictionless and non-swaying.

[0034] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0035] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A magnetically suspended rotor assembly, characterized in that: include: A hydraulic bearing, which is a hollow cylinder, wherein lubricating oil is stored; A rotating shaft, which is movably disposed on the hydraulic bearing and does not contact the inner wall of the hydraulic bearing; A magnetic suspension mechanism, which is arranged on one side of the hydraulic bearing and connected to the rotating shaft, so that the rotating shaft is suspended and penetrates the hydraulic bearing; A rotor housing, which is movably disposed above the hydraulic bearing and fixedly connected to the rotating shaft; A magnetic ring, which is fixedly arranged on the inner wall of the rotor housing and passes through the rotating shaft; Among them, the magnetic levitation mechanism includes a first fixed magnetic plate and a second fixed magnetic plate fixedly arranged in parallel with each other, with a gap between them; a rotating magnetic plate movably arranged in the gap and fixedly connected to the rotating shaft, and the first fixed magnetic plate and the second fixed magnetic plate respectively repel each other with the rotating magnetic plate.

2. A magnetically suspended rotor assembly according to claim 1, characterized in that: A through hole is provided at the center of the hydraulic bearing, and an oil storage tank is provided in the middle of the through hole.

3. A magnetic suspension rotor assembly according to claim 2, characterized in that: A plurality of oil grooves are arranged on the upper and lower sides of the inner wall of the through hole. The oil grooves are in a herringbone shape and contain lubricating oil.

4. The magnetic suspension rotor assembly according to claim 1, characterized in that: The top of the first fixed magnetic sheet is an S pole, and the bottom thereof is an N pole; the top of the second fixed magnetic sheet is an S pole, and the bottom thereof is an N pole; the top of the rotating magnetic sheet is an N pole, and the bottom thereof is an S pole; the first fixed magnetic sheet and the second fixed magnetic sheet repel each other with the rotating magnetic sheet respectively.

5. The magnetic suspension rotor assembly according to claim 1, characterized in that: The top of the first fixed magnetic sheet is an N pole, and the bottom thereof is an S pole; the top of the second fixed magnetic sheet is an N pole, and the bottom thereof is an S pole; the top of the rotating magnetic sheet is an S pole, and the bottom thereof is an N pole; the first fixed magnetic sheet and the second fixed magnetic sheet repel each other with the rotating magnetic sheet respectively.

6. The magnetic suspension rotor assembly according to claim 1, characterized in that: The first fixed magnetic sheet, the second fixed magnetic sheet and the rotating magnetic sheet are all made of sintered NdFeB.

7. A high-speed motor, characterized in that: include: The magnetically suspended rotor assembly and stator assembly as described in any one of claims 1-6; the magnetically suspended rotor assembly is movably arranged on the stator assembly.

8. A high-speed motor according to claim 7, characterized in that: The stator assembly comprises a bracket which is a hollow cavity; a stator mechanism fixedly arranged outside the bracket, on which the magnetic ring is movably arranged; and a connecting wire fixedly arranged on the side of the bracket and electrically connected to the stator mechanism.

9. A high-speed motor according to claim 8, characterized in that: The stator mechanism comprises a stator core and a stator winding. The stator core is fixedly arranged in the bracket, and the stator winding is arranged on the stator core.

10. A high-speed motor according to claim 8, characterized in that: The hydraulic bearing and the magnetic suspension mechanism are respectively arranged in the bracket.

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