Intelligent temperature rise suppression device for generator bearing

Abstract

The invention is applicable to the technical field of generators, and provides an intelligent temperature rise suppression device for a generator bearing, which is characterized in that a bearing assembly, an air guide assembly and a cooling cylinder are additionally arranged on a rotating shaft in a sleeving manner, and an air draft assembly is additionally arranged on the bearing assembly; the air guide assembly is additionally arranged on the side edge of the bearing assembly, and the air guide assembly and the bearing assembly are linearly distributed; the cooling cylinder is arranged outside the air guide assembly in a covering mode, and cooling liquid is contained in the cooling cylinder; the air guide assembly comprises a plurality of air guide pipes which are distributed in an annular array; one end of the air guide pipe is communicated to the air draft assembly, and the other end is communicated to the outside through the cooling cylinder; the air guide pipe is in a circular truncated cone shape with the large air inlet end diameter and the small air outlet end diameter. And the bearing temperature rise control is efficiently realized without being limited by the actual working condition of the bearing and the environment change.

Description

Technical Field

[0001] This invention relates to the field of generator technology, and more specifically, to a smart temperature rise suppression device for generator bearings. Background Technology

[0002] Generator bearings are crucial support components in generator sets, primarily bearing the radial and axial mechanical loads of the rotor. They ensure the rotor maintains precise radial and axial positioning during high-speed rotation, thereby guaranteeing that the dynamic and static clearances between the generator air gap and the flow passage meet design requirements. The operating temperature of generator bearings directly affects their mechanical properties, dimensional stability, and service life. The maximum allowable operating temperature of the bearing is determined by the dimensional stability temperature of the bearing steel heat treatment, the temperature resistance of the cage material, the temperature range of the seals, and the allowable temperature range of the lubricating grease. When the bearing temperature rises abnormally, it not only reduces the viscosity and film-forming ability of the lubricant, destroying the complete lubricating film between the friction pairs, but may also cause thermal deformation and thermal stress in the bearing components, accelerating material fatigue, wear, and even galling failure. In extreme cases, abnormal temperature rises can lead to serious failures such as bearing burnout and rotor seizure, resulting in huge economic losses.

[0003] Currently, generator bearing temperature rise suppression technology mainly focuses on three aspects: reducing internal heat generation, enhancing heat dissipation capacity, and optimizing thermal management strategies. Regarding reducing internal heat generation, engineering typically employs two approaches: optimizing lubrication methods and improving assembly precision. For lubrication, selecting the appropriate lubricant (oil or grease) and its performance parameters based on the bearing type and operating conditions is crucial. For rolling bearings, grease lubrication is widely used due to its simple sealing and convenient maintenance. However, as a semi-solid substance, grease has poor fluidity and heat dissipation capacity, especially under high DN values ​​(the product of bearing radius and rotational speed), making bearing temperature rise control a major challenge.

[0004] While existing generator bearing temperature rise suppression technologies have achieved some success in practice, they still have several limitations. In particular, the simple method of introducing external air cooling, although structurally simple and easy to implement, is significantly affected by ambient temperature. In summer or high-temperature industrial environments, high cooling medium temperatures lead to a substantial decrease in heat dissipation efficiency, making it difficult to meet the requirements for bearing temperature rise control. These simple air-cooling devices typically only introduce ambient air through fans or blades mounted on the shaft, lacking the ability to actively adjust the temperature and flow rate of the cooling medium, and thus failing to achieve adaptive control based on the actual operating conditions of the bearing and environmental changes.

[0005] Taking the patent application number 202022560986.1, "A Device for Reducing the Temperature Rise of Generator Bearings," as an example, the device includes a body, a rotating shaft, and a fixing ring disposed at the rear end of the rotating shaft. Several arc-shaped blades are evenly distributed on the outer side of the fixing ring. When the rotating shaft rotates, the arc-shaped blades drive the airflow, creating a wind-cooling effect. Although this design solves the problem of bearing temperature rise to some extent through wind cooling, it relies entirely on ambient air as the cooling medium and lacks any pre-treatment or temperature regulation mechanism for the cooling medium. In summer, when the ambient temperature reaches 35 degrees Celsius or higher, the temperature of the introduced air is already close to or exceeds the upper limit of the ideal operating temperature of the bearing, resulting in a reduced heat exchange temperature difference and a significant decrease in heat dissipation efficiency. Furthermore, in high-temperature environments, the overall internal temperature of the generator is high, and simply introducing hot air may even exacerbate the bearing temperature rise problem. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies: Existing generator bearing temperature rise suppression technologies simply introduce external air cooling, which, while simple and easy to implement in terms of device structure, is significantly affected by ambient temperature. In summer or high-temperature industrial environments, high cooling medium temperatures lead to a substantial decrease in heat dissipation efficiency, making it difficult to meet the bearing temperature rise control requirements. These simple air-cooling devices typically only introduce ambient air through fans or blades installed on the shaft, lacking the ability to actively adjust the temperature and flow rate of the cooling medium, and thus failing to achieve adaptive control based on the actual bearing operating conditions and environmental changes. Therefore, this invention proposes an intelligent generator bearing temperature rise suppression device.

[0007] The specific technical solution is as follows: a smart temperature rise suppression device for generator bearings, comprising: A bearing assembly is fitted onto a rotating shaft, and an exhaust assembly is fitted onto the bearing assembly; the exhaust assembly acts on the rotating shaft to supply air to the bearing assembly; An air guide assembly is mounted on the side of the bearing assembly and is arranged in a straight line with the bearing assembly; the air guide assembly is sleeved on the rotating shaft but does not contact the rotating shaft. A cooling cylinder is provided outside the air guide assembly, and coolant is installed inside the cooling cylinder. The air guide assembly includes multiple air guide ducts arranged in a ring array. One end of each air guide duct connects to the exhaust assembly, while the other end connects to the outside through a cooling cylinder. Each air guide duct is shaped like a frustum with a larger diameter at the inlet and a smaller diameter at the outlet. The exhaust assembly operates synchronously on the rotating shaft, activating exhaust during shaft rotation. The exhaust assembly draws air from the outside through the multiple air guide ducts. Because the air guide ducts are shaped like frustums with a larger diameter at the inlet and a smaller diameter at the outlet, the airflow gradually compresses and releases heat as it flows along the ducts, thus lowering the temperature. During this process, the coolant inside the cooling cylinder further cools the airflow, causing it to cool further upon entering the air guide assembly. The cooled airflow then continues to blow towards the bearing assembly, achieving efficient bearing temperature control regardless of actual bearing operating conditions or environmental changes.

[0008] In the technical solution of the present invention, the cooling cylinder includes: outer tube; The inner tube is inserted inside the outer tube, and the column center line of the inner tube and the column center line of the outer tube are on the same straight line; the inner tube is sleeved on the rotating shaft but does not contact the rotating shaft. A sealing ring is provided at the ends of the inner and outer tubes; Multiple air inlet pipes are arranged in a ring array along the sealing ring; the multiple air inlet pipes correspond one-to-one with multiple air guide pipes, and the multiple air inlet pipes are inserted through the sealing ring. One end of the air inlet pipe is connected to the air guide pipe and communicates with the air guide pipe; the air inlet pipes are connected to the outside through the sealing ring.

[0009] Furthermore, a cavity is formed between the inner tube, the outer tube, and the sealing ring, and the cavity is filled with coolant; the cavity is ring-shaped, and multiple air ducts are located inside the cavity.

[0010] In the technical solution of the present invention, the air guiding assembly further includes: An air guide shroud is sleeved and connected to the side of the bearing assembly; multiple air guide pipes are inserted through the air guide shroud and connected to the inside of the air guide shroud; The insert tube is inserted and fixed inside the air guide hood, and the columnar center line of the air guide hood and the columnar center line of the insert tube are on the same straight line; the insert tube is on the rotating shaft but does not contact the rotating shaft.

[0011] Furthermore, a second cavity is provided between the air guide shroud and the insertion tube; the second cavity is single-opening and connected to the bearing assembly; multiple air guide tubes are connected to the second cavity.

[0012] In the technical solution of the present invention, the bearing assembly includes: The support ring is divided into an inner support ring and an outer support ring, which are arranged in a straight line and are interconnected. The outer support ring is integrally installed on the air guide assembly and is connected to the air guide assembly. The bearing is mounted on the inner support ring; Cavity 3 is located inside the support ring. One side of cavity 3 is connected to the bearing, and the other side is connected to the air guide assembly.

[0013] Furthermore, the bearing assembly also includes: An air outlet cover is provided on the side of the bearing away from the support ring; Cavity four, the four cavities are located inside the air outlet hood; Multiple air outlets are distributed around the air outlet cover and connected to the cavity; the multiple air outlets are arranged in a ring array along the air outlet cover.

[0014] In the technical solution of the present invention, the exhaust assembly includes: An inner fixing ring, which is assembled on the rotating shaft; Multiple blades are integrally fixed on an inner fixing ring; the multiple blades are arranged in a ring array along the inner fixing ring.

[0015] In the technical solution of the present invention, the air duct is made of a thermally conductive material.

[0016] Compared with existing technologies, the intelligent temperature rise suppression device for generator bearings of this invention can achieve the following: 1. The exhaust assembly acts synchronously on the rotating shaft, and is activated simultaneously during shaft rotation. The exhaust assembly draws air from the outside through multiple air ducts contained in the air guide assembly. Since the air guide ducts are truncated cones with a large diameter at the inlet and a small diameter at the outlet, the airflow gradually compresses and releases heat as it flows along the air guide ducts, thus lowering the temperature. During this process, the coolant inside the cooling cylinder further cools the airflow, and the airflow is cooled after entering the air guide assembly. The cooled airflow then continues to blow onto the bearing assembly, achieving efficient bearing temperature rise control regardless of the actual operating conditions and environmental changes of the bearing. 2. The exhaust power comes entirely from the rotational kinetic energy of the shaft itself, without the need for an external power supply or a separate fan motor. This not only saves energy but also cleverly transforms the unavoidable mechanical energy (shaft rotation) during bearing operation into the power to suppress its own thermal effect (driving the cooling airflow), forming a positive internal energy cycle. This achieves an energy-saving closed loop of using rotation to control heat. The cooling intensity of this device is adaptively matched with the generator speed: the higher the load and the faster the speed, the more heat the shaft generates, and the suction force of the exhaust component is simultaneously enhanced, resulting in a larger air volume and a stronger cooling effect. This is a built-in intelligent feedback mechanism that does not require external control. 3. Traditional cooling designs are often series-connected, resulting in cumulative effects. However, the pre-cooling of the frustum-shaped air duct and the secondary cooling of the coolant in this invention are not simply sequential. The pre-cooling of the air duct first reduces the temperature of the airflow, which makes the temperature difference (ΔT) between the airflow and the coolant greater when the airflow passes through the coolant heat exchanger. According to the basic heat transfer formula Q=UAΔT, the increased temperature difference will directly lead to a significant improvement in the heat transfer efficiency U, thus making the heat exchange effect of the second stage far exceed that of using coolant alone. That is, the two cooling stages produce a synergistic amplification effect. The aerodynamic cooling creates more favorable heat exchange conditions for liquid cooling, resulting in a non-linear enhancement of the overall cooling efficiency of the entire system. The overall cooling capacity far exceeds the arithmetic sum of the effects of the two independent components. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the intelligent temperature rise suppression device for generator bearings of the present invention; Figure 2 for Figure 1 Exploded view; Figure 3 for Figure 2 Schematic diagram of the cooling cylinder structure; Figure 4 for Figure 3 Cross-sectional view of the intermediate cooling cylinder; Figure 5 for Figure 2 Schematic diagram of the central air guide assembly; Figure 6 for Figure 5 Cross-sectional view of the central air guide assembly; Figure 7 for Figure 2 Schematic diagram of the assembly structure of the bearing assembly and the exhaust assembly; Figure 8 for Figure 7 A sectional view; Figure 9 for Figure 1 A sectional view.

[0019] In the attached diagram: Shaft 100; Cooling cylinder 200, air inlet pipe 210, inner pipe 220, sealing ring 230, cavity 240; Air guide assembly 300, air guide cover 310, air guide duct 320, insertion tube 330, cavity two 340; Bearing assembly 400, support ring 410, bearing 420, cavity three 430, air outlet cover 440, air outlet 450, cavity four 460; Exhaust assembly 500, inner fixing ring 510, blades 520. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0021] In one embodiment of the present invention, such as Figures 1-9 As shown: A smart temperature rise suppression device for generator bearings, comprising: A bearing assembly 400 is fitted onto the rotating shaft 100, and an exhaust assembly 500 is fitted onto the bearing assembly 400; the exhaust assembly 500 acts on the rotating shaft 100 to supply air to the bearing assembly 400. The air guide assembly 300 is installed on the side of the bearing assembly 400 and is distributed in a straight line with the bearing assembly 400; the air guide assembly 300 is sleeved on the rotating shaft 100 but does not contact the rotating shaft 100. Cooling cylinder 200, which is covered outside the air guide assembly 300, and coolant is installed inside the cooling cylinder 200; The coolant installed inside the cooling cylinder 200 is existing technology, and detailed information can be found in existing literature and journals, and it can also be purchased directly from the market; it is not the subject of this invention and will not be described in detail here. The coolant can be replaced by using external pipes, temperature sensors, pumps, and coolers to achieve intelligent coolant replacement, which is beneficial for intelligent temperature rise suppression of generator bearings. When the generator is in operation using the shaft 100 and bearing assembly 400, the operating temperature of the bearing assembly 400 directly affects its mechanical properties, dimensional stability and service life. In order to avoid the situation where the bearing temperature rises abnormally, it will not only reduce the viscosity and film-forming ability of the lubricant and destroy the complete lubricating film between the friction pairs, but may also cause thermal deformation and thermal stress of the bearing components, accelerating material fatigue, wear and even glue failure. Therefore, the exhaust assembly 500 acts on the rotating shaft 100 and is activated during the rotation of the rotating shaft 100; the exhaust assembly 500 draws air from the outside through the air guide assembly 300, and the airflow enters the air guide assembly 300 and is cooled by the coolant installed inside the cooling cylinder 200. The cooled airflow will continue to blow towards the bearing assembly 400. The air guide assembly 300 includes multiple air guide pipes 320, which are arranged in a ring array. One end of each air guide pipe 320 is connected to the exhaust assembly 500, and the other end is connected to the outside through the cooling cylinder 200. The air guide pipe 320 is shaped like a frustum with a large diameter at the air inlet and a small diameter at the air outlet. In summary, the exhaust assembly 500 acts synchronously on the rotating shaft 100, and is activated synchronously during the rotation of the shaft 100. The exhaust assembly 500 draws air from the outside through multiple air ducts 320 included in the air guide assembly 300. Since the air guide duct 320 is truncated cone-shaped with a large diameter at the air inlet and a small diameter at the air outlet, the airflow will continuously and gradually compress its volume and release heat as it flows along the air guide duct 320, thus lowering the temperature. During this process, the coolant installed inside the cooling cylinder 200 will cool the airflow a second time, and the airflow will be cooled after entering the air guide assembly 300. The cooled airflow will then continuously blow towards the bearing assembly 400, achieving efficient bearing temperature rise control regardless of the actual operating conditions and environmental changes of the bearing. This research addresses the shortcomings of existing generator bearing temperature rise suppression technologies that rely on simple external air cooling. While these methods are simple and easy to implement, their cooling effect is significantly affected by ambient temperature. In summer or high-temperature industrial environments, high cooling medium temperatures can lead to a substantial decrease in heat dissipation efficiency, making it difficult to meet the bearing temperature rise control requirements. These simple air-cooling devices typically introduce ambient air only through fans or blades mounted on the shaft, lacking the ability to actively adjust the temperature and flow rate of the cooling medium and failing to achieve adaptive control based on the actual bearing operating conditions and environmental changes.

[0022] In another embodiment of the present invention, such as Figures 3-6 and Figure 9 As shown: The cooling cylinder 200 includes: outer tube; The inner tube 220 is inserted inside the outer tube, and the column center line of the inner tube 220 and the column center line of the outer tube are on the same straight line; the inner tube 220 is sleeved on the rotating shaft 100 but does not contact the rotating shaft 100. A sealing ring 230 is disposed at the ends of the inner tube 220 and the outer tube. Multiple air inlet pipes 210 are arranged in a ring array along the sealing ring 230; the multiple air inlet pipes 210 correspond one-to-one with the multiple air guide pipes 320, and the multiple air inlet pipes 210 are inserted through the sealing ring 230. One end of the air inlet pipe 210 is connected to the air guide pipe 320 and communicates with the air guide pipe 320; the air inlet pipe 210 communicates with the outside through the sealing ring 230.

[0023] Furthermore, such as Figure 3 , Figure 4 and Figure 9 As shown: A cavity 240 is provided between the inner tube 220, the outer tube and the sealing ring 230, and the cavity 240 is filled with coolant; the cavity 240 is ring-shaped, and multiple air ducts 320 are located inside the cavity 240.

[0024] In another embodiment of the present invention, such as Figure 5 , Figure 6 and Figure 9 As shown: The air guide assembly 300 further includes: An air guide shroud 310 is sleeved and connected to the side of the bearing assembly 400; multiple air guide pipes 320 are inserted through the air guide shroud 310 and connected to the interior of the air guide shroud 310. The insertion tube 330 is inserted and fixed inside the air guide shroud 310. The column center line of the air guide shroud 310 and the column center line of the insertion tube 330 are on the same straight line. The insertion tube 330 is on the rotating shaft 100 but does not contact the rotating shaft 100.

[0025] Furthermore, such as Figure 5 , Figure 6 and Figure 9 As shown: A cavity 340 is provided between the air guide shroud 310 and the insertion tube 330; the cavity 340 is single-opening and is connected to the bearing assembly 400; multiple air guide tubes 320 are connected to the cavity 340.

[0026] In another embodiment of the present invention, such as Figures 7-9 As shown: The bearing assembly 400 includes: The support ring 410 is divided into an inner support ring and an outer support ring. The inner support ring and the outer support ring are distributed in a straight line and are interconnected. The outer support ring is integrally installed on the air guide assembly 300 and is connected to the air guide assembly 300 (the outer support ring is integrally installed on the air guide cover 310 and is connected to the air guide cover 310). Bearing 420, which is mounted on the inner support ring; Cavity 3 430 is located inside support ring 410. One side of cavity 3 430 is connected to bearing 420, and the other side is connected to air guide assembly 300.

[0027] Furthermore, such as Figures 7-9 As shown: The bearing assembly 400 further includes: An air outlet cover 440 is provided on the side of the bearing 420 away from the support ring 410. Cavity 460, which is located inside the air outlet hood 440; Multiple air outlets 450 are distributed around the air outlet cover 440 and connected to the cavity 460; the multiple air outlets 450 are arranged in a ring array along the air outlet cover 440.

[0028] In another embodiment of the present invention, such as Figures 7-9 As shown: The exhaust assembly 500 includes: An inner fixing ring 510 is mounted on a rotating shaft 100; Multiple blades 520 are integrally fixed on an inner fixing ring 510; the multiple blades 520 are arranged in a ring array along the inner fixing ring 510.

[0029] like Figure 5 and Figure 6 As shown: The air duct 320 is made of a thermally conductive material.

[0030] In summary: During the rotation of the rotating shaft 100, the inner fixed ring 510 and multiple blades 520 of the exhaust assembly 500 are driven synchronously to perform exhaust. Since the air inlet pipe 210, the air guide pipe 320, the second cavity 340 and the third cavity 430 are connected and formed as an air inlet channel, the exhaust assembly 500 completes the exhaust from the outside through the multiple air guide pipes 320 included in the air guide assembly 300. Since the air guide pipe 320 is truncated cone-shaped with a large diameter at the air inlet end and a small diameter at the air outlet end, the airflow flows along the air guide pipe 320. The volume will continuously and gradually compress to release heat and lower the temperature; during this process, the coolant installed inside the cavity 240 of the cooling cylinder 200 will cool the airflow a second time, and then the airflow will be cooled after entering the cavity 430. The cooled airflow will continue to blow towards the bearing 420; thus, the temperature rise of the bearing 420 can be efficiently controlled without being limited by the actual working conditions and environmental changes of the bearing; the airflow after heat exchange through the bearing 420 will be discharged through the air outlet 450 when it gathers inside the cavity 460.

[0031] The intelligent temperature rise suppression device for generator bearings achieves intelligent and efficient temperature rise suppression through a series of ingenious integrated designs. Its core working process is as follows: When the rotating shaft 100 rotates at high speed, it will synchronously drive the exhaust assembly 500 to operate. Its inner fixed ring 510 and multiple blades 520 are like a built-in centrifugal fan, which can generate strong suction without additional power. The resulting negative pressure drives the outside air to flow through the air inlet pipe 210, the air guide pipe 320, the second cavity 340 and the third cavity 430 in sequence, forming a continuous active air inlet channel.

[0032] The air duct 320 is designed as a frustum shape with a large diameter at the air inlet and a small diameter at the air outlet. When the airflow is forced through this constricted channel, the flow velocity will increase significantly. The high-speed airflow will undergo rapid adiabatic expansion the moment it exits the narrow outlet and enters the larger cavity. This process will effectively absorb heat, thereby reducing the overall temperature of the airflow and achieving the first stage of active aerodynamic cooling.

[0033] Subsequently, the pre-cooled airflow enters cavity 240 of the cooling cylinder; cavity 240 is filled with coolant, which acts as a highly efficient indirect heat exchanger to perform a second stage of forced convection heat exchange on the flowing airflow, further and precisely stripping away its heat; this low-temperature, stable airflow, which has undergone dual cooling treatment of "pneumatic compression expansion pre-cooling and deep coolant heat exchange", is continuously and evenly blown onto the target bearing surface to achieve efficient heat dissipation; the hot airflow after heat exchange is collected in cavity 460 and discharged in an orderly manner through air outlet 450, avoiding the circulation of hot air inside the unit.

[0034] The exhaust power comes entirely from the rotational kinetic energy of the shaft 100 itself, without the need for an external power supply or a separate fan motor. This not only saves energy but also cleverly transforms the unavoidable mechanical energy (shaft rotation) during bearing operation into the power to suppress its own thermal effect (driving the cooling airflow), forming a positive internal energy cycle. This achieves an energy-saving closed loop of using rotation to control heat. The cooling intensity of this device is adaptively matched with the generator speed: the higher the load and the faster the speed, the more heat is generated by the shaft, and the suction force of the exhaust component 500 is simultaneously enhanced, resulting in a larger air volume and a stronger cooling effect. This is a built-in intelligent feedback mechanism that does not require external control.

[0035] Traditional cooling designs are often series-based, with cumulative effects. However, the pre-cooling of the frustum-shaped air duct 320 and the secondary cooling of the coolant in this invention are not simply sequential. The pre-cooling of the air duct 320 first reduces the temperature of the airflow, resulting in a larger temperature difference (ΔT) between the airflow and the coolant when the airflow passes through the coolant heat exchanger. According to the basic heat transfer formula Q=UAΔT, the increased temperature difference will directly lead to a significant improvement in the heat transfer efficiency U, thus making the heat exchange effect of the second stage far exceed that of using coolant alone. That is, the two cooling stages produce a synergistic amplification effect. Pneumatic cooling creates more favorable heat exchange conditions for liquid cooling, resulting in a non-linear enhancement of the overall cooling efficiency of the entire system. The overall cooling capacity far exceeds the arithmetic sum of the effects of the two independent components.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A smart temperature rise suppression device for generator bearings, characterized in that, include: A bearing assembly (400) is fitted onto a rotating shaft (100), and an exhaust assembly (500) is fitted onto the bearing assembly (400); the exhaust assembly (500) acts on the rotating shaft (100) to supply air to the bearing assembly (400); An air guide assembly (300) is installed on the side of the bearing assembly (400) and is distributed in a straight line with the bearing assembly (400); the air guide assembly (300) is sleeved on the rotating shaft (100) but does not contact the rotating shaft (100); Cooling cylinder (200), which is covered outside the air guide assembly (300), and coolant is installed inside the cooling cylinder (200); The air guide assembly (300) includes multiple air guide pipes (320), which are arranged in a ring array. One end of the air guide pipe (320) is connected to the exhaust assembly (500), and the other end is connected to the outside through the cooling cylinder (200). The air guide pipe (320) is in the shape of a frustum with a large diameter at the air inlet and a small diameter at the air outlet.

2. The intelligent temperature rise suppression device for generator bearings according to claim 1, characterized in that, The cooling cylinder (200) includes: outer tube; The inner tube (220) is inserted inside the outer tube. The column center line of the inner tube (220) and the column center line of the outer tube are on the same straight line. The inner tube (220) is sleeved on the rotating shaft (100) but does not contact the rotating shaft (100). A sealing ring (230) is provided at the ends of the inner tube (220) and the outer tube; Multiple air inlet pipes (210) are arranged in a ring array along the sealing ring (230); the multiple air inlet pipes (210) correspond one-to-one with the multiple air guide pipes (320); the multiple air inlet pipes (210) are all inserted on the sealing ring (230); one end of the air inlet pipe (210) is connected to the air guide pipe (320) and communicates with the air guide pipe (320); the air inlet pipe (210) communicates with the outside through the sealing ring (230).

3. The intelligent temperature rise suppression device for generator bearings according to claim 2, characterized in that, A cavity (240) is provided between the inner tube (220), the outer tube and the sealing ring (230), and the cavity (240) is filled with coolant. The cavity (240) is ring-shaped, and multiple air ducts (320) are located inside the cavity (240).

4. The intelligent temperature rise suppression device for generator bearings according to claim 1, characterized in that, The air guide assembly (300) also includes: An air guide shroud (310) is sleeved and connected to the side of the bearing assembly (400); multiple air guide tubes (320) are inserted through the air guide shroud (310) and connected to the inside of the air guide shroud (310); The insertion tube (330) is inserted and fixed inside the air guide shroud (310). The column center line of the air guide shroud (310) and the column center line of the insertion tube (330) are on the same straight line. The insertion tube (330) is on the rotating shaft (100) but does not contact the rotating shaft (100).

5. The intelligent temperature rise suppression device for generator bearings according to claim 4, characterized in that, A cavity two (340) is provided between the air guide hood (310) and the insertion tube (330); the cavity two (340) is single-opening and is connected to the bearing assembly (400); multiple air guide tubes (320) are connected to the cavity two (340).

6. The intelligent temperature rise suppression device for generator bearings according to claim 1, characterized in that, The bearing assembly (400) includes: The support ring (410) is divided into an inner support ring and an outer support ring. The inner support ring and the outer support ring are distributed in a straight line and are connected to each other. The outer support ring is integrally installed on the air guide assembly (300) and is connected to the air guide assembly (300). Bearing (420), said bearing (420) is mounted on the inner support ring; Cavity 3 (430) is located inside the support ring (410). One side of cavity 3 (430) is connected to the bearing (420), and the other side is connected to the air guide assembly (300).

7. The intelligent temperature rise suppression device for generator bearings according to claim 6, characterized in that, The bearing assembly (400) also includes: An air vent (440) is provided on the other side of the bearing (420) away from the support ring (410); Cavity four (460), which is located inside the air outlet hood (440); Multiple air outlets (450) are distributed around the air outlet cover (440) and connected to the cavity (460); the multiple air outlets (450) are arranged in a ring array along the air outlet cover (440).

8. The intelligent temperature rise suppression device for generator bearings according to claim 1, characterized in that, The exhaust assembly (500) includes: An inner fixing ring (510) is mounted on a rotating shaft (100); Multiple blades (520) are integrally fixed on an inner fixing ring (510); the multiple blades (520) are arranged in a ring array along the inner fixing ring (510).

9. The intelligent temperature rise suppression device for generator bearings according to claim 1, characterized in that, The air duct (320) is made of a thermally conductive material.

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