Bearing heating device
By designing a bearing heating device, the problem of heating the main bearing of large wind turbines was solved, enabling flexible and reliable heating and installation, adapting to bearings of different diameters, and improving installation efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SICHUAN KETON ZHIFENG NEW ENERGY TECHNOLOGY CO LTD
- Filing Date
- 2025-05-13
- Publication Date
- 2026-04-14
AI Technical Summary
Traditional bearing installation methods are difficult to apply to the main bearings of large wind turbines, especially since the heating process is difficult and slow, leading to installation difficulties.
A bearing heating device was designed, including a bearing support frame and a heating coil winding frame assembly arranged in a ring array around the bearing center. The position of the heating coil can be adjusted by guide rails, sliders and locking screws to adapt to the heating of bearings of different diameters.
This technology enables reliable heating of the main bearing of wind turbines, provides flexibility to accommodate different diameters, and improves installation efficiency and heating reliability.
Smart Images
Figure CN224124284U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of wind turbine generator set maintenance and installation technology, and in particular to a bearing heating device. Background Technology
[0002] The bearings used in this technology are primarily for the main shaft of wind turbines, with diameters reaching several meters and weights reaching several tons. The bearings are interference-fitted to the main shaft. Traditional bearing installation methods include mechanical installation (press-in and hammer-in), hot mounting, cold mounting, and special installation methods (nut fixing and tapered sleeve mounting). Press-in uses pressure equipment (such as hydraulic presses or pressure machines) to evenly press the bearing into the shaft housing or shaft; hammer-in uses a soft metal rod (such as a copper rod) or a special hammering tool to gently tap the inner or outer ring of the bearing, gradually moving it into its installation position. This method is suitable for small bearings or applications with limited installation space. Obviously, mechanical installation is completely unsuitable for large wind turbine bearings. Cold mounting involves cooling the shaft or bearing housing to a low temperature (typically -80℃ to -120℃) to cause it to shrink, then installing the bearing at room temperature onto the shaft or housing. As the temperature rises, the shaft or bearing housing returns to its original dimensions, achieving a tight fit. Similarly, cooling the main shaft and bearing housing of a wind turbine is not suitable due to their enormous size. The hot-fitting method involves heating the bearing to a certain temperature (typically 80℃-100℃) to cause its inner ring to expand, and then quickly installing the heated bearing onto the shaft. As the bearing cools, the inner ring contracts, achieving a tight fit. Traditional hot-fitting methods use hot oil baths to heat the bearings; however, heating the bearings of wind turbines with diameters of several meters is difficult and the heating process is extremely slow.
[0003] Therefore, there is an urgent need to develop a bearing heating device that is simple in structure, reliable in heating, and highly flexible. Utility Model Content
[0004] To address the above problems, the purpose of this utility model is to provide a bearing heating device. The technical solution adopted by this utility model is as follows:
[0005] A bearing heating device for heating a bearing includes a lower support plate, several bearing support frames and heating coil winding frame assemblies arranged in a ring array on the lower support plate with the center of the bearing as the center, and a heating coil wound on the heating coil winding frame assemblies and the bearing; the bearing is placed on the bearing support frames; each of the heating coil winding frame assemblies includes a lower support frame fixed to the lower support plate, a guide rail fixed to the lower support frame and arranged along the diameter direction of the bearing, and two sets of heating coil winding frames arranged on the guide rail; the bearing is placed between the two sets of heating coil winding frames, and the heating coil is wound on the heating coil winding frame.
[0006] Furthermore, the bearing support frame is a portal frame or a T-shaped frame.
[0007] Furthermore, the height of the guide rail is lower than the height of the bearing support frame.
[0008] Furthermore, a slider is sleeved on the guide rail; the heating coil winding frame is fixed on the slider; a locking screw is provided on the slider; the locking screw and the slider are connected by a thread; the locking screw is pressed against the guide rail.
[0009] Furthermore, the guide rail and the slider are connected in a sliding manner using one of the following shapes: trapezoidal, circular, or dovetail.
[0010] Furthermore, the heating coil winding frame is provided with several first through holes and semi-circular grooves.
[0011] Compared with the prior art, the present invention has the following beneficial effects:
[0012] (1) This utility model ensures the reliability of the bearing support of the main shaft of the wind turbine by setting up several bearing support frames in a circular array with the center of the bearing as the center.
[0013] (2) This utility model sets up several heating coil winding frame assemblies, which are also arranged in a ring array with the center of the bearing as the center. Two heating coil winding frames are set on the heating coil winding frame assembly, which are placed on the inner and outer rings of the bearing that ensures the main shaft of the wind turbine, so as to facilitate the winding of the heating coil.
[0014] (3) This utility model is designed with guide rails, sliders and locking screws to facilitate the adjustment of the position of the heating coil winding frame, so as to be suitable for heating bearings of different diameters. It is flexible and reliable.
[0015] In summary, this utility model has the advantages of simple structure, reliable heating, and high flexibility, and has high practical and promotional value in the field of wind turbine maintenance and installation technology. Attached Figure Description
[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope of protection. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of the installation of this utility model.
[0018] Figure 2 This is a schematic diagram of the structure of this utility model.
[0019] Figure 3 This is a schematic diagram of the heating coil winding frame assembly of this utility model.
[0020] In the above figures, the component names corresponding to the reference numerals are as follows:
[0021] 100. Bearing; 1. Lower support plate; 2. Bearing support frame; 3. Heating coil winding frame assembly; 31. Lower support frame; 32. Guide rail; 33. Slider; 34. Locking screw; 35. Heating coil winding frame; 36. First through hole; 37. Semicircular groove. Detailed Implementation
[0022] To make the objectives, technical solutions, and advantages of this application clearer, the present invention will be further described below with reference to the accompanying drawings and embodiments. The embodiments of this utility model include, but are not limited to, the following embodiments. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.
[0023] In this embodiment, the term "and / or" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.
[0024] The terms "first" and "second," etc., used in the specification and claims of this embodiment are used to distinguish different objects, not to describe a specific order of objects. For example, "first target object" and "second target object," etc., are used to distinguish different target objects, not to describe a specific order of target objects.
[0025] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.
[0026] In the description of the embodiments in this application, unless otherwise stated, "multiple" means two or more. For example, multiple processing units means two or more processing units; multiple systems means two or more systems.
[0027] like Figures 1 to 3As shown, this embodiment provides a bearing heating device for heating the bearing 100 of the main shaft of a wind turbine. It includes a lower support plate 1, several bearing support frames 2 arranged in a ring array around the center of the bearing 100 on the lower support plate 1, a heating coil winding frame assembly 3, and a heating coil wound on the heating coil winding frame assembly 3 and the bearing 100. The bearing 100 is placed on the bearing support frame 2 and supported by the bearing support frame 2, which can be configured as a portal frame or a T-shaped frame. It should be noted that the winding method of the heating coil in this embodiment is common knowledge and will not be described in detail here.
[0028] In this embodiment, to accommodate heating bearings 100 of different diameters, the heating coil winding frame assembly 3 includes a lower support frame 31 fixed to the lower support plate 1, a guide rail 32 fixed to the lower support frame 31 and arranged along the diameter direction of the bearing 100, two sliders 33 sleeved on the guide rail 32, a heating coil winding frame 35 fixed to the sliders 33, and a locking screw 34 threaded to the sliders 33 and pressed against the guide rail 32. The bearing 100 is placed between the two sets of heating coil winding frames 35, and the heating coil is wound on the heating coil winding frame 35. In this embodiment, the rail 32 and the sliders 33 can be slidably connected in a trapezoidal, circular, or dovetail shape. The position of the sliders 33 can be adjusted to accommodate heating bearings 100 of different diameters. Furthermore, several first through holes 36 and semi-circular grooves 37 are provided on the heating coil winding frame 35 to facilitate heating coil winding. In addition, in order to ensure that the heating coil winding is flexible and reliable, the height of the guide rail 32 is lower than the height of the bearing support frame 2, so that the heating coil can pass through the lower part of the bearing 100 and ensure the reliability of the heating coil winding.
[0029] The above embodiments are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any changes made based on the design principles of this utility model, or any non-creative changes made on this basis, shall fall within the scope of protection of this utility model.
Claims
1. A bearing heating device for heating a bearing (100), characterized in that, The assembly includes a lower support plate (1), several bearing support frames (2) arranged in a ring array on the lower support plate (1) with the center of the bearing (100) as the center, a heating coil winding frame assembly (3), and a heating coil wound on the heating coil winding frame assembly (3) and the bearing (100); the bearing (100) is placed on the bearing support frame (2); each of the heating coil winding frame assemblies (3) includes a lower support frame (31) fixed on the lower support plate (1), a guide rail (32) fixed on the lower support frame (31) and arranged along the diameter direction of the bearing (100), and two sets of heating coil winding frames (35) arranged on the guide rail (32); the bearing (100) is placed between the two sets of heating coil winding frames (35), and the heating coil is wound on the heating coil winding frame (35).
2. The bearing heating device according to claim 1, characterized in that, The bearing support frame (2) is a portal frame or a T-shaped frame.
3. The bearing heating device according to claim 1, characterized in that, The height of the guide rail (32) is lower than the height of the bearing support frame (2).
4. A bearing heating device according to claim 1, 2, or 3, characterized in that, A slider (33) is fitted on the guide rail (32); the heating coil winding frame (35) is fixed on the slider (33); a locking screw (34) is provided on the slider (33); the locking screw (34) and the slider (33) are connected by threads; the locking screw (34) is pressed against the guide rail (32).
5. A bearing heating device according to claim 4, characterized in that, The guide rail (32) and the slider (33) are connected by sliding in one of the following shapes: trapezoidal, circular, or dovetail.
6. A bearing heating device according to claim 1, 2, or 3, characterized in that, The heating coil winding frame (35) has several first through holes (36) and semi-circular grooves (37).