Integrated cooling system for magnetic suspension and air suspension hybrid bearing and control method of integrated cooling system

Abstract

The invention discloses an integrated cooling system for a magnetic suspension and air suspension hybrid bearing and a control method of the integrated cooling system, and belongs to the technical field of fans. The system aims at a magnetic suspension bearing and an air floating bearing which are axially and adjacently mounted on the same bearing seat, a continuous annular cooling flow channel is arranged in the bearing seat, and the continuous annular cooling flow channel sequentially penetrates through a first cooling area for cooling a magnetic suspension bearing coil and a second cooling area for providing temperature control for an air floating bearing mounting part. The system is provided with the independent cooling driving circulation module, the temperature monitoring module and the cooling control unit, efficient heat dissipation can be conducted on the magnetic suspension bearing according to temperature feedback of the two areas, and accurate temperature management including preheating and constant temperature is achieved on the air suspension bearing area. The problems that heat management of heterogeneous bearings in hybrid bearings is not coordinated, and the structure is complex are solved, high integration, precise regulation and control and energy efficiency optimization of a cooling system are achieved, and the working stability and overall reliability of a hybrid bearing system are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of wind turbine technology, and in particular to an integrated cooling system and control method for a hybrid magnetic levitation and air-floating bearing. Background Technology

[0002] High-speed rotating machinery, such as centrifugal blowers and compressors, is widely used in modern industry. To improve efficiency, reduce friction and wear, and achieve oil-free operation, advanced bearing technology is crucial. Magnetic levitation bearings (active magnetic bearings) and air-floating bearings (such as foil gas bearings) are two representative high-performance bearing technologies. Magnetic levitation bearings actively suspend the rotor using electromagnetic force, offering advantages such as non-contact operation and active vibration control. However, their electromagnetic coils generate significant Joule heat during operation, requiring effective cooling to prevent magnet demagnetization and control thermal deformation. Air-floating bearings rely on an air film formed under high-speed rotation to support the rotor, offering advantages such as wear-free operation and extremely high speed potential. However, their performance is heavily dependent on the working state of the air film, and the stiffness and damping characteristics of the air film are extremely sensitive to the bearing's operating temperature. Excessively low temperatures hinder air film formation and stability, while excessively high temperatures can lead to deterioration of the foil material's properties and uneven thermal deformation, inducing air film instability (such as half-frequency eddying) and affecting operational reliability.

[0003] To combine the advantages of both types of bearings, a hybrid support scheme using magnetic levitation bearings and air-floating bearings has emerged, typically arranged axially adjacent to each other. However, this hybrid arrangement also brings new thermal management challenges: First, the heating mechanisms, power densities, and ideal operating temperature ranges of magnetic levitation bearings and air-floating bearings differ. Traditionally, separate cooling systems designed for each (such as air cooling or independent liquid cooling circuits) suffer from structural complexity, large space requirements, and poor coordination. Second, due to their close installation positions, the heat generated by the magnetic levitation bearing may affect the adjacent air-floating bearing area through heat conduction, interfering with its temperature field and posing a potential threat to the air film stability of the air-floating bearing. Furthermore, during the fan startup phase, the air-floating bearing requires a certain temperature to facilitate rapid air film establishment, but existing systems often lack rapid and precise preheating methods.

[0004] Therefore, the existing technology lacks a thermal management system that can be highly integrated and efficiently meet the requirements of heat dissipation of magnetic levitation bearings and precise temperature control (including preheating and temperature stabilization) of air-floating bearings. This restricts the performance and reliability improvement of magnetic levitation-air-floating hybrid bearing systems under more demanding operating conditions. Summary of the Invention

[0005] Purpose of the invention: The purpose of this invention is to provide an integrated cooling system and control method for a hybrid magnetic levitation bearing. By designing a continuous annular cooling channel within a shared bearing housing, the cooling functions serving the two types of bearings are integrated into one, greatly simplifying the external piping and making the entire hybrid bearing unit structure more compact and reliable.

[0006] Technical solution:

[0007] An integrated cooling system for a hybrid magnetic levitation and air-floating bearing, the hybrid bearing comprising a radial magnetic levitation bearing and a radial foil-type air-floating bearing arranged axially adjacent to each other and mounted together on a bearing housing, the system comprising:

[0008] A continuous internal cooling channel is disposed inside the bearing housing. The internal cooling channel extends circumferentially within the bearing housing and sequentially passes through a first cooling zone that provides cooling for the stator of the magnetic levitation bearing and a second cooling zone that provides cooling for the mounting portion of the air-lift bearing. The second cooling zone is adjacent to the mounting and positioning surface of the air-lift bearing foil. The internal cooling channel is an annular channel arranged around the axis of the bearing housing in both the first and second cooling zones.

[0009] A cooling drive and circulation module, the outlet and inlet of which are connected to the internal cooling channel of the integrated cooling channel bearing housing via pipelines, forming a closed loop;

[0010] A temperature monitoring module includes a first temperature sensor disposed at the outlet of the flow channel in the first cooling zone, and a second temperature sensor disposed on the bearing housing and adjacent to the mounting portion of the air-floating bearing;

[0011] A cooling control unit has its signal input terminal connected to the temperature monitoring module and its control output terminal connected to the cooling drive and circulation module.

[0012] Furthermore, the cross-sectional shape or distribution density of the annular flow channel in the second cooling zone is different from that in the first cooling zone.

[0013] Furthermore, the cooling drive and circulation module includes a variable frequency drive pump, a radiator, a three-way regulating valve, and an auxiliary heater;

[0014] The inlet of the variable frequency drive pump is connected to the outlet of the radiator, the inlet of the radiator is connected to the outlet of the internal cooling channel, and the inlet of the three-way regulating valve is connected to the outlet of the variable frequency drive pump.

[0015] The two outlets of the three-way regulating valve are connected to the inlet of the internal cooling channel via a first branch and a second branch, respectively, and the auxiliary heater is provided on the second branch.

[0016] Furthermore, there are multiple second temperature sensors distributed circumferentially along the bearing housing.

[0017] Furthermore, it is characterized by including a system main controller that is communicatively connected to the cooling control unit.

[0018] An integrated cooling control method for a hybrid magnetic levitation bearing, employing the aforementioned integrated cooling system for hybrid magnetic levitation bearings, includes the following steps:

[0019] S1. Acquire a first temperature signal from a first temperature sensor and a second temperature signal from a second temperature sensor;

[0020] S2. Based on the comparison result between the first temperature signal and the first target threshold, generate a first control command to adjust the cooling drive and circulation module and control the temperature rise of the magnetic levitation bearing.

[0021] S3. Based on the comparison result between the second temperature signal and the second target range, generate a second control command to adjust the cooling drive and circulation module, control the temperature or flow rate of the cooling medium flowing to the second cooling zone, and stabilize the temperature of the air-floating bearing mounting area.

[0022] Further, in step S3, the step of generating a second control command to adjust the cooling drive and circulation module and controlling the temperature of the cooling medium flowing to the second cooling zone specifically includes: according to the second temperature signal, controlling the opening ratio of the three-way regulating valve to adjust the mixing ratio of the mainstream cooling medium cooled by the radiator and the branch cooling medium heated by the auxiliary heater.

[0023] Furthermore, when there are multiple second temperature sensors, the method further includes: calculating the circumferential temperature uniformity of the air bearing mounting area based on the readings of the multiple second temperature sensors; and generating an early warning signal or executing a preset thermal equalization adjustment program when the circumferential temperature uniformity exceeds a preset threshold.

[0024] A hybrid magnetic levitation and air-floating support fan includes a radial magnetic levitation bearing and a radial foil-type air-floating bearing arranged axially adjacent to each other and mounted on the same bearing housing, as well as the aforementioned integrated cooling control method for the hybrid magnetic levitation and air-floating bearing.

[0025] Beneficial effects:

[0026] 1. By designing a continuous annular cooling channel within a shared bearing housing, the cooling functions serving two different bearings are integrated into one, greatly simplifying the external piping and making the entire hybrid bearing unit structure more compact and reliable.

[0027] 2. The system can simultaneously and effectively dissipate heat from the magnetic levitation bearing to prevent its coil from overheating; and can precisely manage the temperature of the air levitation bearing installation area, which can both preheat quickly to facilitate startup and maintain a constant temperature during operation, thereby optimizing the working state of the air film and significantly improving operational stability.

[0028] 3. By monitoring the circumferential temperature uniformity in the air-bearing area, the system can provide early warning or intervene in local thermal imbalances, preventing vibration instability caused by them, and making thermal management a proactive means to ensure rotor stability.

[0029] 4. The system can predict cooling demand based on the real-time operating conditions of the fan and perform intelligent feedforward and feedback control to avoid energy waste and achieve efficient and adaptive operation of the cooling system.

[0030] 5. This solution effectively solves the problem of thermal interference between heterogeneous bearings in hybrid bearings. By providing each bearing with a suitable operating temperature environment, it extends the bearing life and reduces the risk of system failure, making it particularly suitable for applications requiring long-term high-speed and stable operation. Attached Figure Description

[0031] Figure 1 This is a perspective view of the integrated cooling system of the present invention;

[0032] Figure 2 This is a perspective view of the integrated cooling system of the present invention;

[0033] Figure 3 This is a cross-sectional view of the fan of the present invention;

[0034] Figure 4 This is a schematic block diagram of the integrated cooling system of the present invention;

[0035] Figure 5 This is a schematic flowchart of the integrated cooling control method of the present invention. Detailed Implementation

[0036] To make the technical solution of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] Example 1

[0038] like Figure 1 , 2As shown in Figure 4, an integrated cooling system for a hybrid magnetic levitation and air-floating bearing includes a radial magnetic levitation bearing 200 and a radial foil-type air-floating bearing 300, which are axially adjacent to each other and jointly mounted on a bearing housing 100. The system includes:

[0039] A continuous internal cooling channel 110 is disposed inside the bearing housing 100. The internal cooling channel 110 extends circumferentially within the bearing housing 100 and sequentially passes through a first cooling zone that provides cooling for the stator 210 of the magnetic levitation bearing and a second cooling zone that provides cooling for the mounting portion of the air-lift bearing 300. The second cooling zone is adjacent to the mounting and positioning surface of the air-lift bearing foil 310. The internal cooling channel 110 is an annular channel arranged around the axis of the bearing housing 100 in both the first and second cooling zones. The core of this design is to utilize the compactness of the axially adjacent layout to integrate the cooling requirements of two heterogeneous bearings into a shared physical structure. The continuous annular flow channel 110 ensures that the cooling medium can flow evenly along the circumference through its corresponding heat-generating areas. The annular flow channel of the first cooling zone 111 directly wraps around the mounting part of the magnetic levitation bearing stator 210 to efficiently remove the Joule heat generated by the coil. The annular flow channel of the second cooling zone 112 is close to the root mounting surface of the air-floating bearing foil 310. It indirectly regulates the foil temperature by cooling the bearing housing body, thereby affecting the thermodynamic state of the air film and creating good thermal boundary conditions for air film stability.

[0040] A cooling drive and circulation module 400, whose outlet and inlet are connected to the internal cooling channel 110 of the integrated cooling channel bearing housing 100 via pipelines, forms a closed loop. This module provides power and heat exchange capability for the entire cooling system, drives the cooling medium to circulate continuously in the closed loop, carries the heat absorbed in the bearing housing 100 to the outside for dissipation, maintains the operating temperature range of the cooling medium, and is the power basis for the system to achieve active thermal management.

[0041] A temperature monitoring module 500 includes a first temperature sensor located at the outlet of the flow channel in the first cooling zone, and a second temperature sensor located on the bearing housing 100 and adjacent to the mounting portion of the air-lift bearing 300. The first temperature sensor directly monitors the temperature of the cooling medium flowing through the air-lift bearing area, indirectly reflecting the temperature rise of the air-lift bearing coil. The second temperature sensor directly measures the temperature of the air-lift bearing mounting portion, serving as a key feedback signal for sensing the thermal state of the air-film region and achieving precise temperature control. The temperature monitoring module 500 provides the necessary input to the cooling control unit 600.

[0042] A cooling control unit 600 has its signal input terminal connected to the temperature monitoring module 500 and its control output terminal connected to the cooling drive and circulation module 400. As the system's brain, the cooling control unit 600 receives real-time temperature signals from the temperature monitoring module 500, processes and makes decisions through its internal control algorithm, and generates corresponding control commands to output to the cooling drive and circulation module 400. This enables dynamic adjustment of parameters such as cooling intensity and medium temperature, completing a closed-loop control from sensing to execution.

[0043] Furthermore, the cross-sectional shape or distribution density of the annular flow channel 110 in the second cooling zone differs from that in the first cooling zone. This is because the power density and heat dissipation requirements of the magnetic levitation bearing 200 and the air-floating bearing 300 differ. For example, the magnetic levitation bearing coil generates concentrated heat, potentially requiring a larger cross-sectional area or higher distribution density of flow channels to ensure sufficient heat dissipation; while the cooling of the air-floating bearing region prioritizes precise temperature field uniformity, and its flow channel design may focus on a finer distribution to achieve uniform heat conduction. This differentiated design allows a single cooling channel to more efficiently and economically meet the individual cooling needs of both regions.

[0044] Furthermore, the cooling drive and circulation module 400 includes a variable frequency drive pump 410, a radiator 420, a three-way regulating valve 430, and an auxiliary heater 450;

[0045] The inlet of the variable frequency drive pump 410 is connected to the outlet of the radiator 420, the inlet of the radiator 420 is connected to the outlet of the internal cooling channel 110, and the inlet of the three-way regulating valve 430 is connected to the outlet of the variable frequency drive pump 410.

[0046] The two outlets of the three-way regulating valve 430 are connected to the inlet of the internal cooling channel 110 via a first branch 441 and a second branch 442, respectively. The auxiliary heater 450 is installed on the second branch 442. The variable frequency drive pump 410 provides adjustable speed and can adjust the circulation flow of the cooling medium according to the heat load to save energy. The radiator 420 is responsible for cooling the heat-carrying cooling medium to ambient temperature. The combination of the three-way regulating valve 430 and the auxiliary heater 450 is key to achieving precise temperature control, especially for providing preheating for the air-bearing bearing 300. By adjusting the opening ratio of the three-way regulating valve 430, the low-temperature mainstream medium cooled by the radiator 420 can be mixed with the high-temperature diversion medium heated by the auxiliary heater 450, thereby precisely controlling the initial temperature of the cooling medium entering the bearing housing 100 and achieving a wide range of temperature control from strong cooling to active heating.

[0047] Furthermore, multiple second temperature sensors are distributed circumferentially along the bearing housing 100. The air film stability of the air-floating bearing is highly sensitive to the uniformity of the circumferential temperature field; local overheating may lead to uneven thermal deformation, thereby inducing vibration. By arranging multiple circumferentially distributed second temperature sensors, the temperature at various points circumferentially around the air-floating bearing mounting location of the bearing housing 100 can be monitored in real time, and a temperature uniformity index can be calculated. This provides the cooling control unit 600 with more comprehensive thermal state information, enabling it not only to control the average temperature but also to identify and warn of potential local thermal imbalance risks. It can even attempt to equalize the temperature field by adjusting cooling strategies (such as non-uniform flow distribution, if the flow channel design supports it), elevating thermal management to a higher level of ensuring vibration stability.

[0048] Furthermore, it also includes a system main controller 700 that is communicatively connected to the cooling control unit 600. The system main controller 700 typically monitors the core operating status of the fan, such as real-time speed and load current. After communicating with the system main controller 700, the cooling control unit 600 can obtain this operating condition information. Based on the speed and load, the heating trend of the magnetic levitation bearing coil and the air film shear heating trend of the air levitation bearing can be predicted. This enables the cooling control unit 600 to perform feedforward control, pre-adjusting the operating point of the cooling drive and circulation module 400 (e.g., increasing the pump speed or adjusting the mixing temperature in advance) before the temperature rises significantly, thereby improving the response speed of the control system, reducing temperature overshoot, and achieving more intelligent and energy-efficient predictive thermal management.

[0049] In practical implementation, the installation point of the first temperature sensor can be selected at any location in the outlet, inlet, or middle of the first cooling zone channel that can effectively reflect the cooling effect of the magnetic levitation bearing area. Multiple second temperature sensors can be embedded in the bearing housing 100 body, installed in grooves on the outer surface of the bearing housing 100, or otherwise closely fitted near the mounting part of the air-floating bearing 300. The specific installation method and the number of sensors distributed circumferentially can be adjusted according to the requirements for temperature field monitoring accuracy. The arrangement of temperature sensors in the fan can refer to the commonly used methods in existing technologies. Furthermore, the cross-sectional shape of the internal cooling channel is shown as a single shape in the attached diagram, but in practice, it can be circular, rectangular, elliptical, or other suitable shapes. Its specific direction, branch structure, and distribution density in the first and second cooling zones can be optimized according to the heat load distribution of the corresponding areas, for example, by adopting parallel multi-loop, variable cross-section, or non-uniform distribution forms.

[0050] Example 2

[0051] like Figure 5 As shown, an integrated cooling control method for a hybrid magnetic levitation bearing, applying the aforementioned integrated cooling system for hybrid magnetic levitation bearings, includes the following steps:

[0052] S1. Acquire the first temperature signal from the first temperature sensor and the second temperature signal from the second temperature sensor; this is the sensing starting point of the control loop, continuously acquiring temperature feedback from the two key areas to provide a basis for subsequent decision-making and control.

[0053] S2. Based on the comparison result between the first temperature signal and the first target threshold, a first control command is generated to adjust the cooling drive and circulation module 400 and control the temperature rise of the magnetic levitation bearing 200. The insulation material and magnet performance of the magnetic levitation bearing coil have a clear upper temperature limit. The core objective of the first control command is to ensure that the temperature measured by the first temperature sensor (reflecting the coil cooling effect) does not exceed the safety threshold. Adjustment methods typically include increasing the speed of the variable frequency drive pump 410 to increase the cooling medium flow rate, or enhancing the heat dissipation capacity of the radiator 420 (such as starting the fan), aiming to strengthen heat dissipation, which belongs to the traditional temperature safety protection logic.

[0054] S3. Based on the comparison result between the second temperature signal and the second target range, a second control command is generated to adjust the cooling drive and circulation module 400, controlling the temperature or flow rate of the cooling medium flowing to the second cooling zone 112, so as to stabilize the temperature of the mounting area of ​​the air-supported bearing 300. The performance of the air-supported bearing, especially the film stiffness and damping, is optimal within a specific temperature range. The goal of the second control command is to accurately maintain the temperature measured by the second temperature sensor within the preset second target range. This not only includes preventing overheating (by enhancing cooling), but more importantly, in start-up or low-temperature environments, it is necessary to raise the temperature to the operating range. In this case, the control logic is the opposite of S2, reflecting the system's active temperature control capability for the air-supported bearing.

[0055] Further, in step S3, the step of generating a second control command to adjust the cooling drive and circulation module 400 and control the temperature of the cooling medium flowing to the second cooling zone 112 specifically includes: controlling the opening ratio of the three-way regulating valve 430 according to the second temperature signal to adjust the mixing ratio of the mainstream cooling medium cooled by the radiator 420 and the branch cooling medium heated by the auxiliary heater 450. This is the core execution mechanism for achieving precise temperature control. For example, when the second temperature signal is lower than the lower limit of the target range, the cooling control unit 600 will increase the opening of the three-way regulating valve 430 to the second branch 442, allowing more cooling medium to flow through the auxiliary heater 450 and be heated, thereby increasing the temperature of the cooling medium entering the bearing housing 100 after mixing, providing heat to the air-bearing bearing area. Conversely, when the temperature is too high, the opening to the first branch 441 will be increased, allowing more medium cooled by the radiator 420 to flow in, thereby reducing the inlet temperature. Through this continuous proportional adjustment, fine and continuous control of the inlet medium temperature of the second cooling zone 112 can be achieved.

[0056] Furthermore, when there are multiple second temperature sensors, the method further includes: calculating the circumferential temperature uniformity of the mounting area of ​​the air-supported bearing 300 based on the readings of the multiple second temperature sensors; and generating an early warning signal or executing a preset thermal equalization adjustment program when the circumferential temperature uniformity exceeds a preset threshold. This step expands the dimension of temperature control, upgrading from single-point temperature control to temperature field uniformity monitoring. Circumferential temperature uniformity can be quantified by calculating the standard deviation or maximum temperature difference of multiple sensor readings. When uniformity deteriorates (e.g., excessive temperature difference), it indicates the presence of local hot spots or uneven cooling, which may be caused by factors such as bearing housing installation, airflow asymmetry, or local friction. Generating an early warning signal can remind operators to check the system; if the cooling channel design allows for zoned adjustment (e.g., through multiple inlets or built-in valves), a thermal equalization adjustment program can be executed to attempt to provide stronger cooling to areas with higher temperatures to restore the uniformity of the temperature field and prevent film instability caused by uneven thermal deformation from the root cause.

[0057] Example 3

[0058] like Figure 3 As shown, a hybrid magnetic levitation and air-floating support fan includes a radial magnetic levitation bearing 200 and a radial foil-type air-floating bearing 300 axially adjacent and mounted on the same bearing housing 100, as well as the aforementioned integrated cooling control method for the hybrid magnetic levitation and air-floating bearing. This embodiment applies the aforementioned integrated cooling system and control method to a complete rotating machinery product. In this fan, the radial magnetic levitation bearing 200 and the radial foil-type air-floating bearing 300 utilize their compact layout of axially adjacent shared bearing housing 100, combined with an internally penetrating continuous cooling channel 110, to form a hybrid support unit that is highly integrated in both physical and thermal management. The cooling drive and circulation module 400, the temperature monitoring module 500, and the cooling control unit 600 work together to provide intelligent thermal protection for this hybrid support unit. This integrated design allows the wind turbine to achieve the advantages of active control of magnetic levitation bearings and high-speed oil-free operation of air-floating bearings. At the same time, it effectively solves the thermal management problems of both through an innovative cooling solution. In particular, it provides full-cycle temperature optimization for air-floating bearings from cold start-up preheating to high-speed steady-state constant temperature, thereby significantly improving the operational stability, reliability and lifespan of the entire wind turbine rotor system under complex conditions such as high speed and high load.

[0059] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. An integrated cooling system for a hybrid magnetic levitation and air-levitation bearing, characterized in that, The hybrid bearing includes a radial magnetic levitation bearing (200) and a radial foil-type air-floating bearing (300) arranged axially adjacent to each other and mounted together on a bearing housing (100). The system includes: A continuous internal cooling channel (110) is provided inside the bearing housing (100). The internal cooling channel (110) extends circumferentially within the bearing housing (100) and sequentially passes through a first cooling zone that provides cooling for the stator (210) of the magnetic levitation bearing and a second cooling zone that provides cooling for the mounting portion of the air-lift bearing (300). The second cooling zone is adjacent to the mounting and positioning surface of the air-lift bearing foil (310). The internal cooling channel (110) is an annular channel arranged around the axis of the bearing housing (100) in both the first and second cooling zones. A cooling drive and circulation module (400) has its outlet and inlet connected to the internal cooling channel (110) of the integrated cooling channel bearing housing (100) via pipelines, forming a closed loop; A temperature monitoring module (500) includes a first temperature sensor disposed at the outlet of the first cooling zone flow channel and a second temperature sensor disposed on the bearing housing (100) and adjacent to the mounting portion of the air-bearing (300); A cooling control unit (600) has its signal input terminal connected to the temperature monitoring module (500) and its control output terminal connected to the cooling drive and circulation module (400).

2. The integrated cooling system for a hybrid magnetic levitation and air-levitation bearing according to claim 1, characterized in that, The cross-sectional shape or distribution density of the annular flow channel (110) in the second cooling zone is different from that in the first cooling zone.

3. The integrated cooling system for a hybrid magnetic levitation and air-levitation bearing according to claim 1, characterized in that, The cooling drive and circulation module (400) includes a variable frequency drive pump (410), a radiator (420), a three-way regulating valve (430), and an auxiliary heater (450). The inlet of the variable frequency drive pump (410) is connected to the outlet of the radiator (420), the inlet of the radiator (420) is connected to the outlet of the internal cooling channel (110), and the inlet of the three-way regulating valve (430) is connected to the outlet of the variable frequency drive pump (410). The two outlets of the three-way regulating valve (430) are connected to the inlet of the internal cooling channel (110) through the first branch (441) and the second branch (442), respectively, and the auxiliary heater (450) is provided on the second branch (442).

4. The integrated cooling system for a hybrid magnetic levitation and air-levitation bearing according to claim 1, characterized in that, The second temperature sensor is multiple and is distributed circumferentially along the bearing housing (100).

5. The integrated cooling system for a hybrid magnetic levitation and air-levitation bearing according to any one of claims 1 to 4, characterized in that, It also includes a system main controller (700) that is communicatively connected to the cooling control unit (600).

6. An integrated cooling control method for a hybrid magnetic levitation bearing, applied to an integrated cooling system for a hybrid magnetic levitation bearing as described in any one of claims 1 to 5, characterized in that, Includes the following steps: S1. Acquire a first temperature signal from a first temperature sensor and a second temperature signal from a second temperature sensor; S2. Based on the comparison result between the first temperature signal and the first target threshold, generate a first control command to adjust the cooling drive and circulation module (400) and control the temperature rise of the magnetic levitation bearing (200); S3. Based on the comparison result between the second temperature signal and the second target range, generate a second control command to adjust the cooling drive and circulation module (400) and control the temperature or flow rate of the cooling medium flowing to the second cooling zone (112) so as to stabilize the temperature of the air bearing (300) mounting area.

7. The integrated cooling control method for a hybrid magnetic levitation and air-floating bearing according to claim 6, characterized in that, In step S3, the step of generating a second control command to adjust the cooling drive and circulation module (400) and controlling the temperature of the cooling medium flowing to the second cooling zone (112) specifically includes: according to the second temperature signal, controlling the opening ratio of the three-way regulating valve (430) to adjust the mixing ratio of the mainstream cooling medium cooled by the radiator (420) and the branch cooling medium heated by the auxiliary heater (450).

8. The integrated cooling control method for a hybrid magnetic levitation and air-floating bearing according to claim 6, characterized in that, When there are multiple second temperature sensors, the method further includes: calculating the circumferential temperature uniformity of the mounting area of ​​the air-bearing bearing (300) based on the readings of the multiple second temperature sensors; and generating an early warning signal or executing a preset thermal equalization adjustment program when the circumferential temperature uniformity exceeds a preset threshold.

9. A magnetic levitation-air levitation hybrid support fan, characterized in that, The invention includes a radial magnetic levitation bearing (200) and a radial foil-type air-floating bearing (300) that are axially adjacent to each other and mounted on the same bearing housing (100), as well as an integrated cooling control method for a magnetic levitation air-floating hybrid bearing as described in any one of claims 1 to 5.

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