Wind power speed reducer lower machine body structure integrated with tapered roller bearing outer ring

Abstract

The invention discloses a lower machine body structure of a wind power speed reducer integrated with a tapered roller bearing outer ring, relates to the technical field of wind power generation, and is used for solving the technical problems of poor centering precision, complex structure, insufficient rigidity and inconvenience in assembly and maintenance of a split structure in the prior art. According to the wind power speed reducer lower machine body structure integrating the tapered roller bearing outer ring, a lower machine body is of an integral structure formed through integral casting or forging machining, and an outer ring raceway of the tapered roller bearing is directly machined and formed in the bearing installation portion of the lower machine body.

Description

Technical Field

[0001] This invention relates to the field of wind power generation technology, and in particular to a wind turbine reducer lower body structure with an integrated tapered roller bearing outer ring. Background Technology

[0002] Currently, wind turbine gearboxes are the core transmission components in wind turbine generator sets, and their reliability directly affects the service life and power generation efficiency of the entire wind turbine generator set. The lower body, as the basic support structure of the gearbox, bears the weight of key transmission components such as gears and bearings, as well as complex working loads.

[0003] Specifically, in traditional wind turbine gearboxes, the lower body and bearings (especially tapered roller bearings) are usually designed and manufactured as separate parts. This split design is prone to the following drawbacks: (1) Complex structure, large size and weight: The separate bearings and bearing housings increase the number of parts, resulting in a non-compact structure and large weight and size of the entire reducer; (2) Difficulty in ensuring centering accuracy: The split structure is prone to cumulative errors during assembly, which affects the centering accuracy of the bearing and gear shaft, thereby aggravating wear, reducing transmission efficiency and service life; (3) Limited stiffness and load-bearing capacity: There is a clearance between the outer ring of the bearing and the bearing housing. Under huge alternating loads and impact loads, it may lead to fretting wear and a decrease in connection stiffness, thereby affecting the load-bearing capacity; (4) High assembly and maintenance costs: There are many assembly processes, which require high technical skills from workers. Furthermore, the entire bearing housing needs to be disassembled for later maintenance and bearing replacement, resulting in a large workload and long downtime. Summary of the Invention

[0004] The purpose of this invention is to provide a wind turbine reducer lower body structure with an integrated tapered roller bearing outer ring, which solves the technical problems of poor alignment accuracy, complex structure, insufficient rigidity, and inconvenient assembly and maintenance of the existing split structure.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A wind turbine reducer lower body structure with an integrated tapered roller bearing outer ring includes: a lower body, wherein the lower body is an integral structure formed by casting or forging, and the bearing mounting part of the lower body is directly machined to form the outer ring raceway of the tapered roller bearing; During assembly, the assembled tapered rollers, cage, and inner ring assembly are pressed onto the gear shaft. Then, the entire shaft system is hoisted into the lower machine body, allowing the rollers of the inner ring assembly to fall precisely into the integrated outer ring raceway, thus completing the bearing assembly.

[0006] In practical applications, the lower body is made of cast iron, cast steel, or alloy steel.

[0007] The outer raceway surface is hardened by carburizing, quenching, nitriding, or induction hardening.

[0008] Specifically, the lower body is provided with interfaces for installing temperature sensors and vibration sensors.

[0009] Compared with existing technologies, the wind turbine reducer lower body structure with integrated tapered roller bearing outer ring described in this invention has the following advantages: In the wind turbine reducer lower body structure with integrated tapered roller bearing outer ring provided by the present invention, since the tapered roller bearing outer ring is no longer an independent ring part, but its outer ring raceway is directly integrated into the body material of the lower body, it has significant advantages such as lightweight structure, high rigidity and high load-bearing capacity, high centering accuracy and low vibration and noise, as well as more convenient assembly and maintenance. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the lower body structure of a wind turbine reducer with an integrated tapered roller bearing outer ring, provided in an embodiment of the present invention.

[0011] Figure label: 1-Lower body; 2-Outer raceway; 3-Inner race assembly; 4-Gear shaft. Detailed Implementation

[0012] For ease of understanding, the lower body structure of the wind turbine reducer with integrated tapered roller bearing outer ring provided in the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0013] This invention provides a lower body structure for a wind turbine reducer with an integrated tapered roller bearing outer ring, such as... Figure 1 As shown, it includes: a lower body 1, which is an integral structure formed by casting or forging, and the bearing mounting part of the lower body 1 is directly machined to form the outer raceway 2 of a tapered roller bearing; During assembly, the assembled tapered rollers, cage, and inner ring assembly 3 are pressed onto the gear shaft 4. Then, the entire shaft system is hoisted into the lower body 1, so that the rollers of the inner ring assembly 3 fall precisely into the integrated outer ring raceway 2, thus completing the bearing assembly.

[0014] Compared with existing technologies, the wind turbine reducer lower body structure with integrated tapered roller bearing outer ring described in this embodiment of the invention has the following advantages: In the wind turbine reducer lower body structure with integrated tapered roller bearing outer ring provided in this embodiment of the invention, since the tapered roller bearing outer ring is no longer an independent ring part, but its outer ring raceway is directly integrated into the body material of the lower body, it has significant advantages such as lightweight structure, high rigidity and high load-bearing capacity, high centering accuracy and low vibration and noise, as well as more convenient assembly and maintenance.

[0015] In practical applications, the lower body 1 can be made of high-strength cast iron, cast steel or alloy steel, thereby effectively ensuring that the lower body 1 has sufficient strength and toughness.

[0016] The outer raceway 2 surface can be hardened by carburizing, quenching, nitriding or induction hardening to achieve the same or even higher hardness, wear resistance and fatigue strength as the outer race of a standard bearing.

[0017] Specifically, the lower body 1 can be provided with an interface for installing temperature sensors and vibration sensors, thereby facilitating real-time monitoring of the bearing's operating status.

[0018] Furthermore, in the manufacturing process, the blank of the lower body 1 is first obtained by casting or forging. Then, the blank is rough machined and heat-treated (such as normalizing and tempering) to obtain the body strength. Subsequently, the raceway area is surface hardened (such as carburizing and quenching). Finally, through fine machining processes such as fine grinding and polishing, the outer ring raceway 2 achieves the final dimensions and surface quality required by the design.

[0019] In summary, the wind turbine reducer lower body structure with integrated tapered roller bearing outer ring provided by the embodiments of the present invention has the following main advantages: I. Lightweight Structure: By eliminating the independent bearing outer ring and part of the bearing housing structure, the number of parts is reduced, making the overall structure more compact and facilitating the lightweighting and miniaturization of the reducer. Second, the integrated structure eliminates the mating interface between the bearing outer ring and the bearing housing, greatly improving the overall rigidity and connection strength, enabling it to better withstand the complex loads under wind power conditions, and improving the stability and reliability of the transmission. Third, it fundamentally avoids the alignment errors caused by separate assembly, ensuring precise alignment between the bearing and the gear shaft, thereby reducing vibration and noise during transmission and improving transmission efficiency and service life. Fourth, during assembly, the inner ring component can be directly installed onto the lower body with the outer ring raceway, which greatly simplifies the assembly process and reduces assembly time and cost. During maintenance, only the inner ring component needs to be replaced, without having to deal with the bulky lower body, making maintenance convenient and reducing downtime.

[0020] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A wind turbine speed reducer lower body structure integrated with a conical roller bearing outer ring, characterized in that, The application relates to a conical roller bearing assembly. The assembly comprises: A lower body which is integrally formed by casting or forging, and a bearing mounting part of the lower body is directly processed to form an outer ring raceway of a conical roller bearing; 2. The integrated cone roller bearing outer race gear reducer lower body structure according to claim 1, characterized in that, During assembly, the assembled conical roller, cage and inner ring assembly are pressed onto a gear shaft, and then the shaft system is hoisted into the lower body, so that the rollers of the inner ring assembly are accurately dropped into the integrated outer ring raceway, and the assembly of the bearing is completed.

3. The integrated cone roller bearing outer ring wind turbine speed reducer lower body structure according to claim 1 or 2, characterized in that, The lower body is made of cast iron, cast steel or alloy steel.

4. The integrated cone roller bearing outer ring wind turbine speed reducer lower body structure according to claim 3, characterized in that, The surface of the outer ring raceway is subjected to hardening treatment such as carburizing, quenching, nitriding or induction quenching. The lower body is provided with interfaces for mounting temperature sensors and vibration sensors.

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