A magnetic suspension magnetic bearing shell heat dissipation cooling structure
Patent Information
- Application Number
- CN202522726541.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-23
- Publication Date
- 2026-09-08
- Estimated Expiration
- 2035-12-23
AI Technical Summary
[0003]然而，由于磁悬浮磁轴承在悬浮和调控过程中需持续通电，其本体及其控制单元在高负载或高速工况下会产生显著热量
[0013]The aforementioned heat dissipation and cooling structure for the magnetic levitation bearing housing utilizes a labyrinthine water channel along the outer circumference of the inner housing, covered by the outer shell, to form a closed cooling channel close to the heat source. This allows the coolant to flow back and forth multiple times along the circumferential direction within a limited space, significantly increasing the heat exchange area of the cooling channel. Compared to traditional structures that only have a straight-through cooling path on the outer shell, this invention directly integrates the heat exchange structure onto the outer surface of the inner housing close to the magnetic bearing body, enabling more efficient heat transfer to the coolant. Simultaneously, the axial and circumferential annular sealing structure ensures efficient and leak-free coolant flow within the closed path, thereby achieving rapid heat dissipation from the core area of the magnetic bearing and effectively improving its operational stability and thermal management performance under high heat load environments.
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Figure CN224729953U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of magnetic levitation equipment technology, and in particular to a heat dissipation and cooling structure for a magnetic bearing housing. Background Technology
[0002] Magnetic levitation bearings, as a high-performance bearing structure that utilizes magnetic force to achieve non-contact support, are widely used in high-speed rotating machinery, such as magnetic levitation motors, vacuum centrifuges, and precision machining equipment. During operation, these bearings effectively reduce friction and energy loss, improving equipment stability and lifespan.
[0003] However, because magnetic levitation bearings require continuous power during levitation and control, their bodies and control units generate significant heat under high loads or high speeds. If heat dissipation is not timely, the bearing system temperature may rise abnormally, affecting the accuracy of magnetic control and the safety of system operation. Existing magnetic bearing structures often employ air convection or external cooling housings for heat dissipation. However, in applications with compact structures or concentrated heat loads, traditional cooling methods suffer from low heat dissipation efficiency and severe heat accumulation, easily leading to performance degradation or failure risks for the magnetic bearings.
[0004] Especially in terms of shell structure, existing technologies often lack the ability to integrate efficient liquid cooling structures, or only set simple cooling channels on the shell, failing to get close to the core heat source. This results in short cooling paths and limited heat exchange areas, making it difficult to achieve rapid and effective cooling of the magnetic bearing body. In addition, the sealing fit between the shell and the cooling channel in existing structures is not tight enough, which easily leads to problems such as leakage and uneven cooling, limiting its widespread application in high-precision equipment.
[0005] Therefore, there is an urgent need to propose a compact, efficient, and reliable heat dissipation and cooling structure for magnetic bearing housings to meet the thermal management requirements of magnetic levitation bearings and improve their overall operating performance and safety. Utility Model Content
[0006] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a heat dissipation and cooling structure for a magnetic levitation magnetic bearing housing that is compact, has high cooling efficiency, and is reliably sealed.
[0007] To achieve the above objectives, the present invention adopts the following technical solution: A heat dissipation and cooling structure for a magnetic levitation bearing housing includes an outer shell and an inner shell. The outer circumference of the inner shell is provided with a labyrinthine water channel, and a first interface and a second interface are formed at the beginning and end of the circumferential path, respectively. The outer shell is at least partially fitted onto the inner shell and covers the water channel. The outer shell is provided with a radial water inlet and a water outlet, and the water inlet is axially connected to the first interface and the water outlet is axially connected to the second interface. The outer shell and the inner shell are cylindrically interference-fitted, and a first annular sealing structure is provided on the axial contact surface of the two, and a second annular sealing structure is provided on the circumferential contact surface. The first annular sealing structure and the second annular sealing structure are located on both sides of the water channel, surrounding the water channel to form a closed cooling structure.
[0008] Furthermore, the labyrinthine waterway consists of multiple curved channel sections arranged alternately along the circumference.
[0009] Furthermore, the outer shell expands under heat and fits into the inner shell in a cooled state, forming an interference fit connection after cooling and contraction.
[0010] Furthermore, the first annular sealing structure includes a first sealing groove disposed on the end face of the inner shell and a first sealing ring embedded in the first sealing groove; the second annular sealing structure includes two second sealing grooves disposed on the outer circumferential surface of the inner shell and arranged in parallel with each other, and two second sealing rings respectively embedded in the two second sealing grooves; the first sealing groove and the two second sealing grooves are respectively located on both sides of the water channel and cooperate with the outer shell in the axial and radial directions to perform multi-stage sealing of the cooling channel formed around the water channel.
[0011] Furthermore, several fasteners for fixing the outer shell and the inner shell are evenly arranged circumferentially on the end face of the outer shell. The fasteners pass through the end face of the outer shell axially and extend into part of the structure of the inner shell to achieve assembly and locking between the two.
[0012] Furthermore, the inner shell has an axially through hollow cavity, the structural dimensions of which match the shape of the magnetic levitation bearing, for mounting the magnetic levitation bearing body.
[0013] The aforementioned heat dissipation and cooling structure for the magnetic levitation bearing housing utilizes a labyrinthine water channel along the outer circumference of the inner housing, covered by the outer shell, to form a closed cooling channel close to the heat source. This allows the coolant to flow back and forth multiple times along the circumferential direction within a limited space, significantly increasing the heat exchange area of the cooling channel. Compared to traditional structures that only have a straight-through cooling path on the outer shell, this invention directly integrates the heat exchange structure onto the outer surface of the inner housing close to the magnetic bearing body, enabling more efficient heat transfer to the coolant. Simultaneously, the axial and circumferential annular sealing structure ensures efficient and leak-free coolant flow within the closed path, thereby achieving rapid heat dissipation from the core area of the magnetic bearing and effectively improving its operational stability and thermal management performance under high heat load environments. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the heat dissipation and cooling structure of the magnetic levitation magnetic bearing housing provided by this utility model; Figure 2 This is a cross-sectional view of the heat dissipation and cooling structure of the magnetic levitation magnetic bearing housing provided by this utility model; Figure 3 This is an assembly diagram of the inner shell and outer shell provided by this utility model; Figure 4 This is a structural schematic diagram of the inner shell provided by this utility model; Figure 5 This is a schematic diagram of the first interface and the second interface provided by this utility model. Detailed Implementation
[0015] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0016] like Figures 1 to 5 As shown, this application provides a heat dissipation and cooling structure for a magnetic levitation magnetic bearing housing, including an outer shell 1 and an inner shell 2.
[0017] Specifically, the inner shell 2 has a labyrinthine water channel 3 on its outer circumference, and a first interface 31 and a second interface 32 are formed at the beginning and end of its circumferential path, respectively; the outer shell 1 is at least partially fitted onto the inner shell 2 and covers the water channel 3. The outer shell 1 has a radial water inlet 11 and a water outlet 12. The water inlet 11 is axially connected to the first interface 31, and the water outlet 12 is axially connected to the second interface 32; the outer shell 1 and the inner shell 2 are cylindrically interference-fitted. A first annular sealing structure 4 is provided on the axial contact surface of the two, and a second annular sealing structure 5 is provided on the circumferential contact surface; the first annular sealing structure 4 and the second annular sealing structure 5 are located on both sides of the water channel 3, surrounding the water channel 3 to form a closed cooling structure.
[0018] This embodiment constructs a double-shell structure formed by the coaxial fit of the inner shell 2 and the outer shell 1. The labyrinthine water channel 3 is directly machined onto the outer circumferential surface of the inner shell 2, bringing the cooling channel as close to the heat source as possible. The starting and ending ends of the labyrinthine water channel 3 are connected to the first interface 31 and the second interface 32, respectively, to guide the coolant to circulate within the entire annular path. The labyrinthine water channel 3 maximizes the contact area between the cooling channel and the heat source, improving heat dissipation efficiency. The outer shell 1 is fitted radially onto the inner shell 2, covering the water channel 3. Radially arranged inlets 11 and outlets 12 are provided on the outer side of the shell, which are axially connected to the water channel through interfaces, forming a complete closed cooling circuit. To achieve a robust and tight structural connection, a cylindrical interference fit is used between the two shells, and a first annular sealing structure 4 and a second annular sealing structure 5 are respectively provided in the axial and circumferential directions, forming a bidirectional enclosure for the water channel 3, thereby significantly improving the system's sealing effect and operational reliability.
[0019] like Figure 4 As shown, the labyrinthine water channel 3 is composed of multiple curved channel segments arranged alternately along the circumference. This embodiment, by machining the labyrinthine water channel 3 onto the outer circumferential surface of the inner shell 2 and designing it as multiple curved channel segments arranged alternately along the circumference, forces the coolant to flow along multiple turning paths to the outlet after entering the water channel 3. This channel arrangement not only significantly extends the overall flow path of the coolant but also increases the heat exchange contact time and surface area per unit area, thereby improving cooling efficiency. During liquid flow, the presence of the turning structure effectively controls the liquid velocity, helping to form a stable laminar flow state, improving heat exchange uniformity, and preventing localized overheating.
[0020] The outer shell 1 expands under heat and fits onto the cooled inner shell 2, forming an interference fit connection after cooling and contraction. This embodiment uses a thermal expansion and contraction method to achieve an interference fit connection between the outer shell 1 and the inner shell 2. In the specific operation, the inner shell 2 is first cooled to a low temperature, causing its volume to slightly shrink, while the outer shell 1 is heated, causing it to expand to a preset size. Then, the heated outer shell 1 is quickly fitted onto the outer circumferential surface of the cooled inner shell 2. As the temperature returns to normal, the outer shell 1 contracts while the inner shell 2 expands back, forming a tight cylindrical interference contact between them, completing a high-strength, mechanically fastened locking assembly. This fit method ensures the overall rigidity and stability of the structure, while avoiding stress concentration or loosening problems that may be introduced by traditional connection methods.
[0021] like Figure 2 and Figure 4 As shown, the first annular sealing structure includes a first sealing groove 41 disposed on the end face of the inner shell 2, and a first sealing ring embedded in the first sealing groove 41; the second annular sealing structure includes two parallel second sealing grooves 51 disposed on the outer circumferential surface of the inner shell 2, and two second sealing rings respectively embedded in the two second sealing grooves 51; the first sealing groove 41 and the two second sealing grooves 51 are respectively located on both sides of the water channel 3, and cooperate with the outer shell 1 in the axial and radial directions, for multi-stage sealing of the cooling channel formed around the water channel 3. This embodiment designs a bidirectional multi-stage sealing structure to meet the sealing requirements of the cooling channel area. Firstly, the inner shell 2 is machined with a first sealing groove 41 on its axial end face, and a first sealing ring is embedded in the groove to form a first annular sealing structure in the axial direction; secondly, two parallel second sealing grooves 51 are arranged at equal intervals on the outer circumferential surface of the inner shell 2, and two second sealing rings are embedded in each groove to form a second annular sealing structure for circumferential sealing. The first and second annular sealing structures are respectively arranged on the axial and radial sides of the water channel 3. Together with the interference fit of the outer shell 1, they achieve a multi-layered sealing of the entire cooling channel, preventing leakage and seepage of the coolant during operation and ensuring the safety and stability of the cooling system.
[0022] like Figure 1 and Figure 2As shown, several fasteners 6 are evenly arranged circumferentially on the end face of the outer shell 1 to fix the outer shell 1 and the inner shell 2. The fasteners 6 pass through the end face of the outer shell 1 axially and extend into part of the structure of the inner shell 2 to achieve assembly locking between the two. To further enhance the assembly stability and mechanical strength between the outer shell 1 and the inner shell 2, multiple fasteners 6, such as screws or bolts, are evenly arranged circumferentially on the end face of the outer shell 1. The fasteners 6 pass through the axial holes on the end face of the outer shell 1 and extend into the pre-set threaded holes or through holes of the inner shell 2, forming a structural lock between the two through mechanical connection. This configuration not only strengthens the structure of the interference fit, but also provides additional support for the shell under complex loads or vibration conditions, preventing relative displacement or loosening due to thermal expansion and contraction, coolant pressure fluctuations, or rotational inertia. At the same time, this fastening method allows the shell structure to achieve precise positioning and repeated disassembly and assembly capabilities under high-precision assembly conditions.
[0023] like Figure 3 As shown, the inner housing 2 has an axially penetrating hollow cavity inside. The structural dimensions of this hollow cavity match the shape of the magnetic levitation bearing, and it is used to embed the magnetic levitation bearing body. To achieve structural integration and compact installation of the magnetic levitation bearing body, an axially penetrating hollow cavity is provided inside the inner housing 2. This cavity is designed with specific dimensions and contours according to the geometry and installation requirements of the magnetic levitation bearing, allowing the bearing body to be directly embedded within it. Through pre-machined positioning and mating surfaces, the magnetic levitation bearing can achieve high-precision alignment and positioning during installation, ensuring that its levitation axis is consistent with the housing axis, which is beneficial to the smooth operation and control accuracy of the subsequent system. Furthermore, the hollow cavity structure retains an axially penetrating channel, facilitating wiring, ventilation, or maintenance operations.
[0024] The above description of embodiments of the present invention, through which those skilled in the art are able to implement or use the present invention, will be readily apparent to those skilled in the art. Various modifications to these embodiments will be readily apparent to those skilled in the art. The general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novelty disclosed herein.
Claims
1. A heat dissipation and cooling structure for a magnetic levitation bearing housing, characterized in that, It includes an outer shell (1) and an inner shell (2); The outer circumference of the inner shell (2) is provided with a labyrinthine waterway (3), and a first interface (31) and a second interface (32) are formed at the beginning and end of its circumferential path, respectively. The outer shell (1) is at least partially fitted onto the inner shell (2) and covers the water channel (3). The outer shell (1) is provided with a radial water inlet (11) and a water outlet (12). The water inlet (11) is connected to the first interface (31) and the water outlet (12) is connected to the second interface (32) in the axial direction. The outer shell (1) and the inner shell (2) are cylindrical interference fit, and a first annular sealing structure (4) is provided on the axial contact surface of the two, and a second annular sealing structure (5) is provided on the circumferential contact surface. The first annular sealing structure (4) and the second annular sealing structure (5) are located on both sides of the water channel (3) to surround the water channel (3) and form a closed cooling structure.
2. The heat dissipation and cooling structure for the magnetic levitation bearing housing as described in claim 1, characterized in that, The labyrinthine waterway (3) is composed of multiple curved channel sections arranged alternately along the circumference.
3. The heat dissipation and cooling structure for the magnetic levitation bearing housing as described in claim 1, characterized in that, The outer shell (1) is heated and expanded to fit into the inner shell (2) in a cooled state, and forms an interference-locked connection after cooling and shrinking.
4. The heat dissipation and cooling structure for the magnetic levitation bearing housing as described in claim 1, characterized in that, The first annular sealing structure includes a first sealing groove (41) disposed on the end face of the inner shell (2), and a first sealing ring embedded in the first sealing groove (41); The second annular sealing structure includes two parallel second sealing grooves (51) arranged on the outer circumferential surface of the inner shell (2), and two second sealing rings respectively embedded in the two second sealing grooves (51); The first sealing groove (41) and the two second sealing grooves (51) are located on both sides of the water channel (3) and cooperate with the outer shell (1) in the axial and radial directions to perform multi-stage sealing of the cooling channel formed around the water channel (3).
5. The heat dissipation and cooling structure for the magnetic levitation bearing housing as described in claim 1, characterized in that, The outer shell (1) is provided with a plurality of fasteners (6) evenly arranged circumferentially on the end face for fixing the outer shell (1) and the inner shell (2). The fasteners (6) pass through the end face of the outer shell (1) axially and extend into part of the structure of the inner shell (2) to achieve assembly and locking between the two.
6. The heat dissipation and cooling structure for the magnetic levitation bearing housing as described in claim 1, characterized in that, The inner shell (2) has an axially penetrating hollow cavity inside. The structural dimensions of the hollow cavity match the shape of the magnetic levitation bearing and are used to embed the magnetic levitation bearing body.