Motor with static magnetic supporting structure

Abstract

The utility model discloses a motor with a static magnetic support structure, which comprises a rotor, a stator and a casing, the stator is fixed in the casing, and the rotor is rotatably arranged in the stator; the motor further comprises two sets of magnetic supporting assemblies, the magnetic supporting assemblies are arranged at the two ends of the rotor respectively, each magnetic supporting assembly comprises a fixing ring, a shaft sleeve, a first magnetic ring and a second magnetic ring, the fixing rings are arranged on the machine shell, the shaft sleeves are arranged on a rotating shaft of the rotor, and the first magnetic rings and the second magnetic rings are fixed to the fixing rings and the shaft sleeves respectively. And the second magnetic ring is positioned in the first magnetic ring. According to the utility model, the parallel magnetic field formed by axial magnetization of the stator and rotor magnetic rings reduces the load of the rolling bearing, so that most of the pressure of the heavy compressor rotor on the mechanical bearing is balanced by the magnetic support structure, the service life of the mechanical bearing is prolonged, the system cost is reduced, the linear speed of the rotor system is increased, and the service life of the rotor system is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor field, especially a motor with static magnetic force support structure. BACKGROUND

[0002] With the continuous progress of technology, the rotation speed of motor is higher and higher, and the rotor is usually connected with the casing through bearing to support the rotor to rotate. However, with the increase of load and rotation speed of motor, the load is applied to the bearing, which greatly reduces the service life of motor. SUMMARY

[0003] In view of the defects in the prior art, the main purpose of the utility model is to overcome the defects in the prior art, and a motor with static magnetic force support structure is disclosed, which comprises a rotor, a stator and a casing, the stator is fixed in the casing, and the rotor is rotatably arranged in the stator; further comprising two sets of magnetic force support assemblies, the magnetic force support assemblies are arranged at both ends of the rotor, the magnetic force support assembly comprises a fixed ring, a shaft sleeve, a first magnetic ring and a second magnetic ring, the fixed ring is arranged on the casing, the shaft sleeve is arranged on the rotating shaft of the rotor, the first magnetic ring and the second magnetic ring are fixed on the fixed ring and the shaft sleeve respectively, and the second magnetic ring is located in the first magnetic ring.

[0004] Further, the length of the second magnetic ring is 1.5-3 times the length of the first magnetic ring.

[0005] Further, the thickness of the second magnetic ring is 0.5-2.5 times the thickness of the first magnetic ring.

[0006] Further, the magnetization direction of the first magnetic ring and the second magnetic ring is axial magnetization, and the magnetization directions are consistent.

[0007] Further, the two ends of the casing are provided with end covers, and the rotating shaft and the end cover are connected through rolling bearings.

[0008] Further, the fixed ring and the casing are fixed through bolts.

[0009] Further, the fixed ring is axially provided with a first fixed edge, and the casing is axially provided with a second fixed edge, and after the fixed ring and the casing are assembled, the first fixed edge and the second fixed edge overlap.

[0010] The utility model has the advantages of:

[0011] The parallel magnetic field formed by axial magnetization of the stator and the rotor magnetic ring reduces the load of the rolling bearing, most of the pressure of the compressor rotor with large weight on the mechanical bearing is balanced by the magnetic force supporting structure, the service life of the mechanical bearing is increased, the linear speed and the service life of the rotor system are improved while the system cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 A structure diagram of a motor with a static magnetic force supporting structure according to the utility model;

[0013] The reference signs are as follows:

[0014] 1, rotor, 2, stator, 3, casing, 4, magnetic force supporting assembly, 5, rolling bearing, 11, rotating shaft, 12, second fixed edge, 31, end cover, 41, fixed ring, 42, shaft sleeve, 43, first magnetic ring, 44, second magnetic ring, 411, first fixed edge. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical scheme and advantages of the utility model more clear and intelligible, the utility model will be further described in detail below by combining with the drawings and examples. It should be understood that the specific examples described here are only used to explain the utility model and not to limit the utility model.

[0016] A motor with a static magnetic force supporting structure, as shown in Figure 1 , comprising a rotor 1, a stator 2 and a casing 3, the stator 2 is fixed in the casing 3, and the rotor 1 is rotatably arranged in the stator 2; the rotor 1 is driven to rotate by the stator 2. It also includes two sets of magnetic force supporting assemblies 4, the magnetic force supporting assemblies 4 are arranged at both ends of the rotor 1, and the rotor 1 is supported by the magnetic force supporting assemblies 4. Specifically, the magnetic force supporting assembly 4 includes a fixed ring 41, a shaft sleeve 42, a first magnetic ring 43 and a second magnetic ring 44, the fixed ring 41 is arranged on the casing 3, the shaft sleeve 42 is arranged on the rotating shaft 11 of the rotor 1, the first magnetic ring 43 and the second magnetic ring 44 are fixed on the fixed ring 41 and the shaft sleeve 42 respectively, and the second magnetic ring 44 is located in the first magnetic ring 43. The second magnetic ring 44 is suspended in the first magnetic ring 43.

[0017] In an embodiment, as shown in Figure 1 , the length of the second magnetic ring 44 is 1.5-3 times the length of the first magnetic ring 43.

[0018] In an embodiment, as shown in Figure 1 , the thickness of the second magnetic ring 44 is 0.5-2.5 times the thickness of the first magnetic ring 43.

[0019] In an embodiment, as shown in Figure 1 , the magnetization direction of the first magnetic ring 43 and the second magnetic ring 44 is axial magnetization, and the magnetization directions are consistent.

[0020] In an embodiment, as shown in Figure 1 The two ends of the shell 3 are provided with end covers 31, and the rotating shaft 11 is connected with the end covers 31 through rolling bearings 5.

[0021] In an embodiment, as shown in Figure 1 The fixed ring 41 is fixed with the shell 1 through bolts.

[0022] In an embodiment, as shown in Figure 1 The fixed ring 41 is provided with a first fixed edge 411 in the axial direction, and the shell 1 is provided with a second fixed edge 12 in the axial direction; after the fixed ring 41 is assembled with the shell 1, the first fixed edge 411 overlaps with the second fixed edge 12, so that the fixed ring 41 is stably connected with the shell 3.

[0023] After the two embodiments are matched, the bolts are arranged in the circumferential direction of the shell 3, and the first fixed edge 411 and the second fixed edge 12 are connected through the bolts.

[0024] In use, as shown in Figure 1 The rotor 1 is supported through the magnetic force supporting assembly 4, and the rotor is supported through the rolling bearing 5, so that most of the large pressure of the compressor rotor with large weight on the mechanical bearing is balanced by the magnetic force supporting assembly 4.

[0025] The above is only a preferred embodiment of the utility model, and is not used to limit the implementation range of the utility model; if the utility model is modified or replaced equivalently without departing from the spirit and range of the utility model, all should be covered in the protection range of the utility model claim.

Claims

1. An electric machine having a static magnetic force support structure, comprising a rotor, a stator and a casing, said stator being fixed in said casing, said rotor being rotatably disposed in said stator; characterized in that, Further comprising two sets of magnetic force supporting assemblies, which are arranged at two ends of the rotor, each of the magnetic force supporting assemblies comprises a fixing ring, a shaft sleeve, a first magnetic ring and a second magnetic ring, the fixing ring is arranged on the casing, the shaft sleeve is arranged on the rotating shaft of the rotor, the first magnetic ring and the second magnetic ring are fixed on the fixing ring and the shaft sleeve respectively, and the second magnetic ring is located in the first magnetic ring.

2. An electric machine having a static magnetic force support structure according to claim 1, characterized in that, The length of the second magnetic ring is 1.5-3 times of the length of the first magnetic ring.

3. The electric machine with static magnetic force support structure according to claim 1, characterized in that, The thickness of the second magnetic ring is 0.5-2.5 times of the thickness of the first magnetic ring.

4. The electric machine with static magnetic force support structure of claim 1, wherein, The magnetization directions of the first magnetic ring and the second magnetic ring are axial magnetization, and the magnetization directions are consistent.

5. The electric machine having a static magnetic force support structure according to claim 1, characterized by, End covers are mounted at two ends of the casing, and the rotating shaft is connected with the end covers through rolling bearings.

6. The electric machine having a static magnetic force support structure according to claim 1, characterized by, The fixing ring is fixed with the casing through bolts.

7. The electric machine having a static magnetic force support structure according to claim 1, characterized by, The fixing ring is axially provided with a first fixing rim, the casing is axially provided with a second fixing rim, and the first fixing rim overlaps with the second fixing rim after the fixing ring is assembled with the casing.

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