New energy magnetic suspension motor bearing

Abstract

The utility model discloses a new energy magnetic suspension motor bearing, including setting up first bearing and second bearing in one end of motor shaft, first bearing with second bearing adopts DF matching installation, setting up third bearing in the other end of motor shaft, first bearing, second bearing and third bearing outer surface all coat MoS2 coating. Relative to prior art, this motor bearing realizes efficient axial and radial bearing and positioning, solves the lubrication problem under high speed high temperature environment simultaneously, improves the operation efficiency, stability and service life of magnetic suspension motor.

Description

Technical Field

[0001] This utility model relates to the field of new energy magnetic levitation motor technology, and in particular to a new energy magnetic levitation motor bearing. Background Technology

[0002] In the field of new energy, magnetic levitation motors, with their advantages of high efficiency, energy saving, and low noise, are widely used in many key scenarios such as wind power generation and high-speed trains. However, during operation, magnetic levitation motors must withstand high centrifugal forces, high temperatures, and complex load conditions caused by high-speed rotation. Traditional bearings face many challenges under these conditions. On the one hand, it is difficult to simultaneously achieve efficient axial and radial load-bearing capacity, leading to displacement deviations during motor operation, affecting operational accuracy and stability. On the other hand, under high-speed and high-temperature environments, the lubrication performance of bearings decreases sharply, wear intensifies, significantly shortens bearing life, and increases maintenance costs and downtime. These problems severely restrict the further improvement of magnetic levitation motor performance and its widespread application.

[0003] Therefore, this utility model needs to provide a method that achieves efficient axial and radial load bearing and positioning, while solving the lubrication problem in high-speed and high-temperature environments, thereby improving the operating efficiency, stability and service life of the magnetic levitation motor. Utility Model Content

[0004] The purpose of this invention is to provide a new energy magnetic levitation motor bearing, thereby solving the aforementioned problems existing in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A new energy magnetic levitation motor bearing includes a first bearing and a second bearing installed at one end of the motor shaft. The first bearing and the second bearing are installed in a DF pair. A third bearing is installed at the other end of the motor shaft. The first bearing and the second bearing each include a first inner ring, a first outer ring and a plurality of first steel balls. The first inner ring and the first outer ring are provided with a first raceway on their surfaces. The first steel balls are evenly distributed in the first raceway. The outer surfaces of the first inner ring, the first outer ring and the first steel balls are all coated with a MoS2 coating.

[0007] Furthermore, the diameter of the first raceway on the side of the first bearing and the second bearing that are close to each other is larger than the diameter of the first raceway on the side of the first bearing and the second bearing that are far from each other.

[0008] Furthermore, the first steel ball is a ceramic steel ball.

[0009] Furthermore, the contact point between the first steel ball and the first inner ring and the first outer ring is C, and the contact angle formed is θ.

[0010] Furthermore, the third bearing includes a second inner ring, a second outer ring, and a plurality of second steel balls. The second steel balls are located within a second raceway provided by the second inner ring and the second outer ring. The outer surfaces of the second inner ring, the second outer ring, and the second steel balls are all coated with a MoS2 coating.

[0011] Furthermore, a ball-filling port is provided at point V of the second inner ring and the second outer ring, which not only strengthens the wall thickness h1 of the second outer ring and the wall thickness h2 of the second inner ring, but also allows the second steel ball to fill the second raceway through the ball-filling port.

[0012] Furthermore, the ball loading port is designed with a locking mechanism, the locking amount of which is set as t, the outer ring locking amount is t1, the inner ring locking amount is t2, the bearing clearance is set as Gr, D is the outer diameter of the bearing, and t1=t2=t=(Gr+D*0.001)*0.5.

[0013] Furthermore, MoS2 coating is applied to the G1 and G2 sections of the first raceway and the G3 and G4 sections of the second raceway of the bearing.

[0014] Furthermore, the preload of the clearance between the first bearing and the second bearing is 0.01-0.02 mm.

[0015] The beneficial effects of this utility model are:

[0016] Because of the MoS2 coating, this invention provides excellent lubrication for the bearings in high-speed, high-temperature environments, effectively reducing bearing wear, extending bearing life, and lowering the maintenance costs of the magnetic levitation motor. Furthermore, by employing DF paired angular contact bearings and full-ball bearings, it achieves efficient axial and radial load bearing and positioning, significantly improving the operational stability and accuracy of the magnetic levitation motor under complex working conditions, significantly enhancing the bearing's ability to withstand impact loads, and improving the reliability and durability of the magnetic levitation motor. Attached Figure Description

[0017] Figure 1 This is an assembly drawing of the bearing and motor shaft of this utility model;

[0018] Figure 2 This is a cross-sectional view of the bearing of this utility model;

[0019] Figure 3 This is a top view of the third bearing of this utility model;

[0020] Figure 4 This is a cross-sectional view of the third bearing of this utility model;

[0021] Figure 5 This is a diagram of the bearing raceway for this utility model.

[0022] Figure label:

[0023] 1. Motor shaft; 2. First bearing; 3. Second bearing. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0025] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0028] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this application can be implemented without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0029] like Figures 1 to 5As shown, a new energy magnetic levitation motor bearing includes a first bearing 2 and a second bearing 3 at one end of a motor shaft 1. The first bearing 2 and the second bearing 3 are installed in a DF pair. A third bearing 4 is provided at the other end of the motor shaft 1. The first bearing 1 and the second bearing 2 each include a first inner ring, a first outer ring, and a plurality of first steel balls. The first inner ring and the first outer ring are provided with a first raceway on their surfaces. The first steel balls are evenly distributed in the first raceway. The outer surfaces of the first inner ring, the first outer ring, and the first steel balls are all coated with a MoS2 coating. The first steel balls are ceramic steel balls.

[0030] As demonstrated above, the MoS2 coating provides excellent lubrication for the bearings under high-speed, high-temperature conditions, effectively reducing wear, extending service life, and lowering maintenance costs. Furthermore, the use of DF paired angular contact bearings and full-ball bearings creates axial (A) and radial (R) positioning. Radial (R) positioning primarily balances radial imbalance at the impeller end, while axial (A) positioning balances axial imbalance in the rotor. This significantly improves the stability and accuracy of the magnetic levitation motor under complex operating conditions, enhances its impact load capacity, and improves reliability and durability. MoS2 possesses high melting point, low coefficient of friction, and good chemical stability. Under the high-temperature environment generated by the high-speed rotation of the magnetic levitation motor, the MoS2 coating forms a stable lubricating film between bearing components, effectively reducing friction and wear, and achieving excellent lubrication. Meanwhile, the coating can also resist high temperature and chemical corrosion, protect the bearing substrate material, and extend the service life of the bearing. The MoS2 coating is applied to the surface of bearing components using physical vapor deposition (PVD) or chemical vapor deposition (CVD) processes, and has a high melting point, low coefficient of friction and good chemical stability.

[0031] Specifically, such as Figure 1 As shown, the diameter of the first raceway on the approach surface of the first bearing and the second bearing is larger than the diameter of the first raceway on the distance surface of the first bearing and the second bearing. The first bearing and the second bearing are DF (face-to-face) paired angular contact bearings with a full-ball structure. The face-to-face pairing technology arranges the contact angles of the two angular contact bearings relative to each other. This pairing method can effectively improve the rigidity of the bearing system and mainly realize the functions of axial load bearing and axial positioning. When facing the axial force generated during the operation of the magnetic levitation motor, the DF paired angular contact bearing can evenly distribute the axial force to each steel ball due to its special pairing structure, which greatly enhances the axial load bearing capacity. At the same time, due to its precise pairing design, it can accurately achieve axial positioning, ensuring the stable operation of the motor shaft in the axial direction and reducing axial displacement deviation.

[0032] To ensure that the DF-paired bearings can withstand impact forces in the axial direction A and the radial direction R, the contact point between the first steel ball and the first inner ring and the first outer ring is C. After the clearance is eliminated, the contact angle formed by the pair of bearings is θ, and a preload of 0.01-0.02 mm is formed.

[0033] Furthermore, the third bearing includes a second inner ring, a second outer ring, and a plurality of second steel balls. The second steel balls are located in the second raceway between the second inner ring and the second outer ring. The outer surfaces of the second inner ring, the second outer ring, and the second steel balls are all coated with a MoS2 coating. Similarly, the third bearing is coated with a MoS2 coating on its outer surface to achieve a lubrication effect of the bearing under high speed and high temperature.

[0034] Additionally, it should be noted that the second inner ring and the second outer ring are provided with ball loading ports at point V. While enhancing the wall thickness h1 of the second outer ring and the wall thickness h2 of the second inner ring, the second steel balls can be filled into the second raceway through these ball loading ports. The third bearing adopts a unique ball loading port structure and is a full-ball structure, which is used to achieve radial load bearing and radial positioning.

[0035] Furthermore, the ball loading port is designed with a locking mechanism, with the locking amount set as t, the outer ring locking amount t1, and the inner ring locking amount t2. Let the bearing clearance = Gr, D be the outer diameter of the bearing, t1 = t2 = t = (Gr + D * 0.001) * 0.5. Based on the experience of multiple experiments, the ball loading hole ground according to the ball loading locking amount designed by the above process is convenient for fully loading ceramic balls and makes the bearing rotate smoothly, meeting the basic requirements of high-speed rotation.

[0036] In addition, it is worth mentioning that the G1 and G2 sections of the first raceway and the G3 and G4 sections of the second raceway of the bearing are coated with MoS2 material. The MoS2 material is evenly coated on the raceway surface and has a good lubrication effect.

[0037] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A bearing for a new energy magnetic levitation motor, characterized in that, The device includes a first bearing and a second bearing at one end of the motor shaft, the first bearing and the second bearing being installed in a DF pair, and a third bearing at the other end of the motor shaft. The first bearing and the second bearing each include a first inner ring, a first outer ring and a plurality of first steel balls. The first inner ring and the first outer ring are provided with a first raceway on their surfaces close to each other. The first steel balls are evenly distributed in the first raceway. The outer surfaces of the first inner ring, the first outer ring and the first steel balls are all coated with a MoS2 coating.

2. The new energy magnetic levitation motor bearing according to claim 1, characterized in that: The diameter of the first raceway on the side of the first bearing and the second bearing that are close to each other is greater than the diameter of the first raceway on the side of the first bearing and the second bearing that are far from each other.

3. The new energy magnetic levitation motor bearing according to claim 2, characterized in that: The first steel ball is a ceramic steel ball.

4. The new energy magnetic levitation motor bearing according to claim 2, characterized in that: The contact point between the first steel ball and the first inner ring and the first outer ring is C, and the contact angle formed is θ.

5. The new energy magnetic levitation motor bearing according to claim 4, characterized in that: The third bearing includes a second inner ring, a second outer ring, and a plurality of second steel balls. The second steel balls are located in the second raceway provided by the second inner ring and the second outer ring. The outer surfaces of the second inner ring, the second outer ring, and the second steel balls are all coated with a MoS2 coating.

6. The new energy magnetic levitation motor bearing according to claim 5, characterized in that: The second inner ring and the second outer ring are provided with a ball loading port at point V. While increasing the wall thickness h1 of the second outer ring and the wall thickness h2 of the second inner ring, the second steel ball can be filled into the second raceway through this ball loading port.

7. The new energy magnetic levitation motor bearing according to claim 6, characterized in that: The ball loading port is designed with a locking mechanism, and the locking amount of the locking mechanism is set as t, with the outer ring locking amount t1 and the inner ring locking amount t2. Let the bearing clearance be Gr, D be the outer diameter of the bearing, and t1 = t2 = t = (Gr + D * 0.001) * 0.

5.

8. The new energy magnetic levitation motor bearing according to claim 5, characterized in that: MoS2 coating is applied to the G1 and G2 sections of the first raceway and the G3 and G4 sections of the second raceway of the bearing.

9. The new energy magnetic levitation motor bearing according to claim 5, characterized in that: The preload of the clearance between the first bearing and the second bearing is 0.01-0.02 mm.

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