Large horizontal motor bearing bush lubricating oil cooling device

Abstract

The invention relates to the technical field of motor engineering, in particular to a large horizontal motor bearing bush lubricating oil cooling device. The device comprises a cooling main body and two flange plates, a cooling liquid channel is arranged in the cooling main body, a main body section is arranged in a bearing bush oil chamber, and two ends extend to the outside; the flange plates slidably sleeve two ends of the cooling body and are detachably connected with the outer wall of the bearing bush oil chamber. During working, the cooling main body is in direct contact with high-temperature lubricating oil, heat is absorbed through the wall surface and the fins of the main body section, the heat is led out through internal circulating cooling liquid, and the oil temperature can be controlled within a safety threshold value under the extreme working condition of 40 DEG C. The sliding design of the flange plate can adapt to oil chambers of different sizes, and universality is improved; the detachable connection does not need large-scale transformation of the motor, and the motor can be quickly mounted only by presetting mounting holes, so that the construction difficulty and the inventory cost are reduced, and the motor is suitable for various large horizontal bearing bush type motors.

Description

Technical Field

[0001] This invention relates to the field of electrical engineering technology, and in particular to a large horizontal motor bearing lubricating oil cooling device. Background Technology

[0002] In industrial production, large horizontal electric motors (bearing type) serve as core power equipment, widely used in critical scenarios such as hydropower generation, metallurgical rolling, chemical reactions, and large pumping stations. Their stable operation directly determines the capacity and safety of the entire production line. The bearings of this type of motor, as the core transmission component connecting the rotor journal and the stator housing, generate a large amount of heat during high-speed operation due to the sliding friction between the journal and the bearing. If this heat cannot be dissipated in time, it will cause a sharp decrease in the viscosity of the bearing lubricating oil, leading to lubrication failure and serious malfunctions such as bearing wear, bearing burnout, and rotor jamming. This can even cause the motor to shut down, resulting in huge economic losses for the company.

[0003] Currently, the mainstream cooling method for lubricating oil in large horizontal electric motors (bearing type) in the industry generally relies on the natural cooling of the heat sink fins in the bearing oil chamber at the motor end cover. However, on the one hand, in hot summer weather or in tropical and subtropical regions, the outdoor ambient temperature often exceeds 35°C, directly causing the air temperature inside the factory to rise to 30-40°C, which greatly reduces the temperature difference between the heat sink fins and the air, and significantly reduces the efficiency of natural convection heat transfer. On the other hand, some motors are installed in enclosed factories or high-temperature workshops (such as steelmaking workshops in metallurgical plants or next to reaction sections in chemical plants). In addition to the high temperature inside the factory, there are also pollutants such as dust and oil adhering to the surface of the heat sink fins, which reduces the heat transfer efficiency. Summary of the Invention

[0004] To address the technical problem of low efficiency in traditional natural cooling of lubricating oil in the bearing chambers of large horizontal motors, this invention provides a lubricating oil cooling device for large horizontal motor bearings. Therefore, the present invention provides the following technical solution: A large horizontal motor bearing lubricating oil cooling device includes a cooling body and two flanges. The cooling body has a channel for coolant flow inside. The main body is located inside the bearing oil chamber of the horizontal motor, and both ends of the cooling body extend to the outside of the bearing oil chamber. The two flanges are slidably sleeved on the two ends of the cooling body located outside the bearing oil chamber, and the flanges are detachably connected to the outer wall of the bearing oil chamber.

[0005] Furthermore, the outer wall of the main body section of the cooling body is provided with fins, which are evenly distributed along the circumference of the main body section of the cooling body, and each fin is fixedly connected to the outer wall of the cooling body.

[0006] Furthermore, a sealing ring is provided between the mating surfaces of the flange and the cooling body.

[0007] Furthermore, the overall structural shape of the cooling body is cylindrical.

[0008] Furthermore, the cooling body is made of copper.

[0009] Furthermore, the flange facing the bearing oil chamber has a hollow external threaded column coaxially arranged with the cooling body.

[0010] Furthermore, the flange is provided with fixing bolt holes.

[0011] Furthermore, the outer ring of the flange has a hexagonal profile.

[0012] Advantages and positive effects of the present invention: The cooling unit of this device is placed directly inside the bearing oil chamber, making direct contact with the high-temperature lubricating oil within. The coolant circulating inside the cooling unit can directly absorb heat from the lubricating oil through the unit's walls. Simultaneously, the larger direct contact area between the main unit and the lubricating oil, combined with continuous coolant circulation, allows for rapid control of the lubricating oil temperature within a safe threshold. Even under extreme conditions such as high summer temperatures or factory temperatures reaching 40°C, stable heat dissipation is maintained.

[0013] This device, with its "flanges slidingly fitted at both ends of the cooling body", allows for precise matching of the outer wall spacing of different bearing oil chambers by adjusting the position of the two flanges in the extension section of the cooling body. This eliminates the need for separate design for a single motor model, significantly improving the device's versatility and reducing production and inventory costs.

[0014] The cooling body is detachably connected to the flange and the outer wall of the bearing oil chamber. This eliminates the need for large-scale modifications to the motor end cover and bearing oil chamber. Only pre-set mounting holes are required. During installation, simply insert the cooling body into the oil chamber, align the sliding flange with the mounting holes, and fix it in place. This significantly reduces on-site construction difficulty and downtime for modification. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 The present invention provides an overall structural diagram of a large horizontal motor bearing lubricating oil cooling device.

[0017] Figure 2The present invention provides a structural diagram of the flange of a large horizontal motor bearing lubricating oil cooling device.

[0018] Figure 3 The front view of the flange of a large horizontal motor bearing lubricating oil cooling device provided by the present invention.

[0019] In the diagram: 1. Cooling body; 2. Fins; 3. Flange; 4. External threaded post; 5. Fixing bolt holes. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0021] This invention provides a large horizontal motor bearing lubricating oil cooling device, such as... Figure 1 As shown, it includes a cooling body 1 and two flanges 3. The cooling body 1 has a channel for coolant to flow inside. The main body of the cooling body 1 is located inside the bearing oil chamber of the horizontal motor, and both ends of the cooling body 1 extend to the outside of the bearing oil chamber. The two flanges 3 are respectively slidably sleeved on the two ends of the cooling body 1 located outside the bearing oil chamber, and the flanges 3 are detachably connected to the outer wall of the bearing oil chamber.

[0022] The outer wall of the main body section of the cooling body 1 is provided with fins 2, which are evenly distributed along the circumference of the main body section of the cooling body 1. Each fin 2 is fixedly connected to the outer wall of the cooling body 1. The fins 2 on the outer wall of the main body section of the cooling body 1 significantly increase the contact area between the cooling body and the lubricating oil, enhancing heat absorption efficiency. The overall structure of the cooling body 1 is cylindrical. The cooling body 1 is made of copper. Copper has a high thermal conductivity, which can quickly absorb the heat from the high-temperature lubricating oil in the oil chamber and conduct the heat to the internal coolant channels.

[0023] A sealing ring is provided between the mating surfaces of flange 3 and cooling body 1. For example... Figures 2-3As shown, the flange 3, facing the bearing oil chamber, has a hollow external threaded post 4 coaxially arranged with the cooling body 1. A sealing ring between the mating surfaces of the flange 3 and the cooling body 1 fills the gap after sliding contact, preventing lubricating oil in the oil chamber from leaking out. Simultaneously, the threaded engagement of the hollow external threaded post 4 with the oil chamber mounting hole further enhances the sealing performance of the oil chamber, preventing lubrication failure due to lubricating oil leakage. The flange 3 has fixing bolt holes 5. The outer ring of the flange 3 has a hexagonal profile.

[0024] Working principle: During the installation process, according to the actual size of the bearing oil chamber, the positions of the two flanges 3 in the extension section of the cooling body 1 are slidably adjusted so that the hollow external threaded post 4 on the flange 3 is precisely aligned with the preset mounting holes on both sides of the bearing oil chamber. The flange 3 is rotated and initially fixed by the threaded engagement between the external threaded post 4 and the mounting hole. Then, bolts are inserted through the fixing bolt holes 5 on the flange 3 and tightened to complete the stable connection between the device and the oil chamber. The hexagonal outer ring of the flange 3 makes it easy to operate with a wrench, improving installation efficiency.

[0025] After the device is installed, the main body of the cooling unit 1 is completely placed in the bearing oil chamber and in direct contact with the high-temperature lubricating oil. When the motor is running, the heat generated by the friction of the bearing is transferred to the lubricating oil, causing the lubricating oil temperature to rise.

[0026] The coolant channel inside the cooling body 1 is filled with circulating coolant. When the coolant flows in the channel, it quickly absorbs the heat conducted by the cooling body, forming a complete heat transfer path of lubricating oil, fins, cooling body, and coolant in sequence. The coolant carrying heat flows out from the end of the cooling body 1 that extends to the oil chamber, enters the external cooling system to complete the cooling, and then re-enters the coolant channel to form a continuous circulation, continuously removing the heat from the bearing oil chamber and achieving lubricating oil temperature control.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A large horizontal motor bearing lubricating oil cooling device, characterized in that, It includes a cooling body (1) and two flanges (3). The cooling body (1) has a channel for coolant to flow inside. The main body of the cooling body (1) is located inside the bearing oil chamber of the horizontal motor, and both ends of the cooling body (1) extend to the outside of the bearing oil chamber. The two flanges (3) are respectively slidably sleeved on the two ends of the cooling body (1) located outside the bearing oil chamber, and the flanges (3) are detachably connected to the outer wall of the bearing oil chamber.

2. The large horizontal motor bearing lubricating oil cooling device according to claim 1, characterized in that, The outer wall of the main body section of the cooling body (1) is provided with fins (2). The fins (2) are evenly distributed along the circumference of the main body section of the cooling body (1), and each fin (2) is fixedly connected to the outer wall of the cooling body (1).

3. The large horizontal motor bearing lubricating oil cooling device according to claim 1, characterized in that, A sealing ring is provided between the mating surfaces of the flange (3) and the cooling body (1).

4. A large horizontal motor bearing lubricating oil cooling device according to claim 1, characterized in that, The overall structure of the cooling body (1) is cylindrical.

5. A large horizontal motor bearing lubricating oil cooling device according to claim 1, characterized in that, The cooling body (1) is made of copper.

6. A large horizontal motor bearing lubricating oil cooling device according to claim 1, characterized in that, The flange (3) facing the bearing oil chamber has a hollow external threaded column (4) that is coaxial with the cooling body (1).

7. A large horizontal motor bearing lubricating oil cooling device according to claim 1, characterized in that, The flange (3) is provided with fixing bolt holes (5).

8. A large horizontal motor bearing lubricating oil cooling device according to claim 1, characterized in that, The outer ring of the flange (3) has a hexagonal outline.

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