Rotor core assembly structure for electromagnetic bearing
By employing bushing rings, pressure plates, and high-temperature structural adhesive in the rotor core assembly for electromagnetic bearings, the problem of insufficient sealing was solved, enabling stable operation in high-temperature and high-humidity environments and enhancing the equipment's vibration and corrosion resistance.
Patent Information
- Application Number
- CN202423029151.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-09
AI Technical Summary
At present, the rotor core assembly of electromagnetic bearings has insufficient sealing performance in high temperature and high humidity environments, leading to sealing failure. Moreover, the construction is complicated, affecting the stability and lifespan of the equipment.
It adopts a bushing ring and pressure plate structure, uses high-temperature structural adhesive and anti-corrosion paint layer, and forms a solid connection through heat fitting and welding to ensure sealing and corrosion resistance. The design of pressure plate and bushing ring ensures coaxiality, and through holes facilitate disassembly and maintenance.
It improves the sealing performance and vibration and corrosion resistance of the rotor core, making it suitable for high-speed, high-temperature, and high-humidity operating conditions, thus extending the service life and operational reliability of the equipment.
Smart Images
Figure CN223599604U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to rotor production technical field, and specifically is a rotor core subassembly structure for electromagnetic bearing. BACKGROUND
[0002] The rotor core subassembly for electromagnetic bearing is an important component of modern high-performance rotating equipment, and its structure usually comprises a motor rotating shaft and a rotor core, which is directly connected to the motor rotating shaft.
[0003] However, the rotor core subassembly structure still has some technical deficiencies. First, in terms of sealing, the application of high-temperature structural adhesive has the problems of complex construction process and limited adhesion, which leads to unstable sealing performance of the subassembly in the long run, especially in high-humidity or strong-corrosion environments. SUMMARY
[0004] The utility model aims at providing a rotor core subassembly structure for electromagnetic bearing to solve at least one of the problems and defects in the background.
[0005] The utility model provides a rotor core subassembly structure for electromagnetic bearing, which comprises a motor rotating shaft, a bushing ring body is sleeved above the motor rotating shaft, a plurality of accommodating grooves are arranged on the bushing ring body, a pressing plate is arranged on both sides of each accommodating groove, a rotor core is arranged between the two pressing plates, a sealing layer is arranged between the pressing plate and the rotor core, and an anticorrosive paint layer (6) is arranged on the surface of the rotor core.
[0006] Further, the sealing layer is a high-temperature structural adhesive layer, which is made of polyimide-based structural adhesive, silicone high-temperature structural adhesive, epoxy resin-based high-temperature structural adhesive, etc., and has the characteristics of high-temperature resistance and bonding strength.
[0007] Further, the surface of the rotor core is provided with an anticorrosive paint layer, which can withstand the vibration and mechanical friction during the operation of the rotor core, has strong adhesion and is not easy to peel off, so as to ensure its long-term protection effect, has good insulation performance, and has high-temperature resistance.
[0008] Further, the pressing plate is made of titanium alloy material, and the pressing plate forms a stable mechanical connection with the bushing and the motor rotating shaft by pressing the rotor core, so as to ensure the coaxiality of the rotor core during operation and avoid performance degradation or equipment damage caused by operation deviation.
[0009] Further, the pressing plate and the bushing ring body are both provided with a welded cutout, which helps to automatically align the pressing plate and the bushing ring body during assembly and welding, ensures the coaxiality of the two, and ensures the overall sealing performance of the subassembly through the joint action of welding and high-temperature adhesive.
[0010] Further, the bushing ring body is provided with a through hole inside, and the motor rotating shaft is arranged in the through hole, so that the bushing ring body can be quickly disassembled from the motor rotating shaft through the through hole structure, and the maintenance difficulty is reduced.
[0011] Compared with the prior art, the utility model has the beneficial effects that:
[0012] The bushing ring body is sleeved on the rotor core to install the motor rotating shaft, so that the stability of the overall structure is ensured. The rotor core is pressed by the pressing plate and filled with a sealing layer, so that the structural sealing property is ensured. The rotor core is sprayed with an anticorrosive paint layer on the outer circle, so that the corrosion resistance of the rotor core is ensured. The entire structure has high sealing property for the rotor core, is suitable for high-speed, high-temperature and high-humidity working conditions, and enhances the vibration resistance, corrosion resistance and external influence resistance of the rotor core through the pressing plate clamping, colloid sealing and spraying protection, so that the overall service life and operation reliability are improved. BRIEF DESCRIPTION OF DRAWINGS
[0013] In order to facilitate the understanding of those skilled in the art, the utility model will be further described below in combination with the drawings.
[0014] Figure 1 It is a whole cross-sectional structure schematic view of a rotor core assembly structure for an electromagnetic bearing.
[0015] Figure 2 It is a bushing ring body cross-sectional structure schematic view provided by the utility model.
[0016] In the figure: 1, motor rotating shaft; 2, bushing ring body; 21, accommodating groove; 22, through hole; 3, pressing plate; 4, rotor core; 5, sealing layer; 6, anticorrosive paint layer. DETAILED DESCRIPTION
[0017] In order to make the purpose, technical scheme and advantages of the application more clear, the application is described and explained below in combination with the drawings and examples.
[0018] It is apparent that the drawings in the following description merely show some examples or embodiments of the present application, and the present application can be applied to other similar situations without creative efforts by those skilled in the art based on these drawings. In addition, it can be understood that, although the efforts made in the development process can be complex and lengthy, some designs, manufacturing or production changes based on the technology disclosed in the present application are only routine technical means for those skilled in the art related to the content disclosed in the present application, and should not be understood as insufficient disclosure of the content disclosed in the present application.
[0019] However, unnecessary detailed descriptions can be omitted. For example, there are cases where detailed descriptions of well-known matters, repeated descriptions of actually identical structures are omitted. This is to avoid the following description from becoming unnecessarily lengthy and to facilitate understanding by those skilled in the art. In addition, the drawings and the following description are provided to enable those skilled in the art to fully understand the present application, and are not intended to limit the subject matter recited in the claims.
[0020] Please refer to Figures 1-2 As shown in the drawings, the utility model discloses a rotor core assembly structure for electromagnetic bearing, including motor shaft 1, the sleeve ring body 2 of motor shaft 1 top is equipped with, be provided with a plurality of containing groove 21 on sleeve ring body 2, a plurality of containing groove 21 both sides are provided with the pressing plate 3, be provided with rotor core 4 between two pressing plates 3, be provided with sealing layer 5 between pressing plate 3 and rotor core 4, through rotor core 4 hot sleeve on sleeve ring body 2, again sleeve ring body 2 hot sleeve to motor shaft 1, form the close connection, hot sleeve mode utilizes the stress change when material is heated expansion and cooling contraction, ensure the high strength combination between each component, avoid the looseness in operation.
[0021] Sleeve ring body 2 is provided with containing groove 21, and rotor core 4 is clamped and fixed through pressing plate 3, and both sides pressing plate 3 clamps rotor core 4, can effectively prevent rotor core 4 from deviating or deforming under high speed due to centrifugal force, to enhance the stability of the overall structure, filling sealing layer 5 at both ends of rotor core 4, not only can increase the connecting strength between components, but also can play a sealing role, prevent the inside of rotor core 4 from being damp or entering impurities. By rotor core 4 sleeve sleeve ring body 2 installs motor shaft 1, ensure the stability of the overall structure. By pressing plate 3 pressing rotor core 4 and filling sealing layer 5, ensure the structure sealing, by the outer circle of rotor core 4 spray anticorrosive paint layer 6, ensure the corrosion resistance of rotor core 4, the whole structure is high in sealing property to rotor core 4, is suitable for high speed, high temperature, high humidity working conditions, through the clamping of pressing plate 3, the sealing of colloid and the spraying protection, the ability of anti-vibration, anticorrosion and resistance to external influences is enhanced, thereby improving the overall service life and operation reliability.
[0022] In one embodiment, as shown in Figure 1 and Figure 2 , the sealing layer 5 is a high-temperature structural adhesive layer, which is a polyimide-based structural adhesive, a silicone high-temperature structural adhesive, an epoxy resin-based high-temperature structural adhesive, etc., and has the characteristics of high-temperature resistance, bonding strength, etc.
[0023] In one embodiment, as shown in Figure 1 and Figure 2 , the surface of the rotor core 4 is provided with a corrosion-resistant paint layer 6, which is mainly used to protect the rotor core 4 from the influence of external environment (such as humidity, salt spray, high-temperature oxidation), thereby improving its durability and reliability. The surface of the rotor core 4 is exposed to the air and is easily eroded by oxidation or humidity, salt spray, etc. The corrosion-resistant paint layer 6 isolates the core from the outside world, reducing the occurrence of oxidation and corrosion. The corrosion-resistant paint layer 6 can form an insulating film on the surface of the rotor core 4 to prevent leakage or short circuit caused by humidity or conductive particles during operation. The motor generates heat during high-speed rotation and power-on process, so the corrosion-resistant paint layer 6 needs to have certain high-temperature resistance to ensure that it does not soften, fall off or decompose under high-temperature conditions.
[0024] The corrosion-resistant paint layer 6 can withstand the vibration and mechanical friction of the core during operation, and has strong adhesion and is not easy to peel off, so as to ensure its long-term protection effect. It has good insulation performance and high-temperature resistance. The specific material is water-based organic silicon insulating varnish, YA402 insulating paint and low-odor water-based insulating paint with excellent rust prevention performance, etc.
[0025] In one embodiment, as shown in Figure 1 and Figure 2 , the pressing plate 3 is made of titanium alloy material. The pressing plate 3 prevents the rotor core 4 from loosening, shifting or deforming due to centrifugal force, vibration or thermal expansion during high-speed rotation by pressing the rotor core 4. It forms a stable mechanical connection with the bushing and the motor shaft 1, ensuring that the rotor core 4 maintains coaxiality during operation, avoiding performance degradation or equipment damage caused by running deviation.
[0026] In one embodiment, as shown in Figure 1 and Figure 2 , the pressing plate 3 and the bushing ring body 2 are both provided with a welding cutout, and the two are fixedly connected by welding in the subsequent process. The cutout design is usually a bevel, V-shaped or U-shaped, which helps to automatically align the pressing plate 3 and the bushing ring body 2 during assembly and welding, ensuring their coaxiality. The welding and high-temperature glue work together to ensure the overall sealing of the assembly, effectively preventing water vapor or corrosive gas from entering the core or the bushing in a high-humidity, high-temperature environment. The cutout design enhances the welding strength of the pressing plate 3 and the bushing ring body 2, ensuring the stability of the assembly during operation.
[0027] In one embodiment, please refer to Figure 1 and Figure 2 As shown in the drawings, the sleeve ring body 2 is internally provided with a through hole 22, the motor rotating shaft 1 is arranged in the through hole 22, and the rotor core 4 is indirectly connected to the motor rotating shaft 1 through the sleeve ring body 2. The existence of the through hole 22 ensures the mechanical stability of the whole assembly. When the assembly needs to be repaired or replaced, the sleeve ring body 2 can be quickly detached from the motor rotating shaft 1 through the through hole 22 structure, thereby reducing the maintenance difficulty.
[0028] The above is only an example and description of the structure of the utility model, and those skilled in the art can make various modifications or supplements or use similar ways to replace the described specific embodiments, as long as they do not deviate from the structure of the utility model or exceed the scope defined by the present claims, which shall belong to the protection scope of the utility model.
Claims
1. A rotor core assembly structure for an electromagnetic bearing, comprising a motor shaft (1), characterized in that, A bushing ring (2) is fitted above the motor shaft (1). The bushing ring (2) has several receiving grooves (21). Pressure plates (3) are provided on both sides of the several receiving grooves (21). A rotor core (4) is provided between two pressure plates (3). A sealing layer (5) is provided between the pressure plate (3) and the rotor core (4). An anti-corrosion paint layer (6) is provided on the surface of the rotor core (4).
2. The rotor core assembly structure for an electromagnetic bearing according to claim 1, characterized in that, The sealing layer (5) is a high-temperature structural adhesive layer.
3. The rotor core assembly structure for an electromagnetic bearing according to claim 1, characterized in that, The pressure plate (3) is made of titanium alloy.
4. The rotor core assembly structure for an electromagnetic bearing according to claim 3, characterized in that, Both the pressure plate (3) and the bushing ring (2) are provided with welding slits.
5. The rotor core assembly structure for an electromagnetic bearing according to claim 1, characterized in that, Each bushing ring (2) has a through hole (22) inside, and the motor shaft (1) is located inside the through hole (22).