CN-121993489-A - Tapered roller bearing, shafting structure and wind driven generator

Abstract

The application relates to the technical field of transmission parts, and discloses a tapered roller bearing, a shafting structure and a wind driven generator. The inner diameter surface of the inner ring of the tapered roller bearing is a conical surface, and the diameter of the inner diameter surface of the inner ring gradually reduces along the direction from the end with the larger outer diameter to the end with the smaller outer diameter. The tapered roller bearing, the shafting structure and the wind driven generator provided by the application have the advantages that the matching effect between the bearing and the shaft is improved, and the running stability of the system is ensured.

Inventors

• LIANG BAOZHU

Assignees

• 远景能源有限公司

Dates

Publication Date

20260508

Application Date

20260206

Claims (8)

1. 1. A tapered roller bearing, characterized by comprising: the tapered roller bearing comprises an inner ring, an outer ring, and a tapered roller and a retainer which are arranged between the inner ring and the outer ring, wherein an intersection point of a raceway surface generatrix of the inner ring and a raceway surface generatrix of the outer ring is positioned on a central axis of the tapered roller bearing, an inner diameter surface of the inner ring is a conical surface, and the inner diameter of the inner ring is gradually reduced from one end with a larger outer diameter to one end with a smaller outer diameter of the inner ring.
2. 2. The tapered roller bearing according to claim 1, wherein an inner diameter taper angle of the inner ring is 3 to 15 °.
3. 3. The tapered roller bearing according to claim 1, wherein the outer diameter surface of the outer ring is a tapered surface, and the outer diameter of the outer ring gradually decreases from the end with the larger inner diameter to the end with the smaller inner diameter.
4. 4. A new tapered roller bearing as claimed in claim 3, characterized in that the outer ring has an outer diameter cone angle of 3-15 °.
5. 5. A shafting structure comprising a bearing housing, a shaft and the tapered roller bearing of any one of claims 1 to 4, the shaft being rotatably connected to the bearing housing by the tapered roller bearing.
6. 6. The shafting structure of claim 5, wherein the shaft conforms to a change in diameter of the mating surface of the inner race and the inner diameter surface of the inner race, and the bearing housing conforms to a change in diameter of the mating surface of the outer race and the outer diameter surface of the outer race.
7. 7. The shafting structure of claim 5, wherein the taper deviation of the mating surface of the shaft and inner race and the inner diameter surface of the inner race is no more than 0.2 ° and the taper deviation of the bearing housing and mating surface of the outer race and outer diameter surface of the outer race is no more than 0.2 °.
8. 8. A wind power generator comprising the shafting structure of any one of claims 5 to 7.

Description

Tapered roller bearing, shafting structure and wind driven generator Technical Field The application relates to a low-speed main shaft system in the technical field of wind power generation, in particular to a tapered roller bearing, a shaft system structure and a wind power generator. Background With the continuous development of new energy technology, the duty ratio of wind power generation is also continuously improved. Wind power generation can utilize wind widely flowing in nature to generate electricity, wind drives blades of a wind driven generator to rotate, wind energy is further converted into mechanical energy, and then a rotor is driven to rotate to generate electric energy. The power generation process has no pollutant, so the power generation process is environment-friendly and is an important power source in new energy. The low-speed main shaft system is a key subsystem which plays a role in transmitting power in the wind driven generator, and in the running process of the wind driven generator, the main shaft can transmit the power of the wind wheel, and the main shaft bearing supports the main shaft. The operational stability of the main shaft and the main shaft bearing affects the normal operation of the wind power generator, and therefore, how to ensure the cooperation between the two and the operational stability is an important problem. Disclosure of Invention The embodiment of the application aims to provide a tapered roller bearing, a shafting structure and a wind driven generator, which can be beneficial to ensuring the running stability of a low-speed main shaft system. In order to solve the technical problems, an embodiment of the application provides a tapered roller bearing. The tapered roller bearing comprises an inner ring and an outer ring, a tapered roller group and a retainer are arranged between the inner ring and the outer ring, an intersection point of a raceway surface generatrix of the inner ring and a raceway surface generatrix of the outer ring is positioned on a central axis of the tapered roller bearing, an inner diameter surface of the inner ring is a conical surface, and the inner diameter of the inner ring is gradually reduced from one end with a larger outer diameter to one end with a smaller outer diameter. The embodiment of the application provides a shafting structure. The shafting structure comprises a bearing seat, a shaft and the tapered roller bearing, wherein the shaft is rotationally connected with the bearing seat through the tapered roller bearing. The embodiment of the application also provides a wind driven generator, which comprises the shafting structure. According to the tapered roller bearing, the shafting structure and the wind driven generator provided by the embodiment of the application, the assembly surface of the bearing inner ring, which is contacted with the main shaft matching surface, is arranged to be conical, namely the surface of the bearing inner ring, which is contacted with the main shaft, is provided with a gradually changing diameter. Therefore, the guide function of the conical shape can be utilized, so that the spindle bearing can be assembled in place on the spindle, the minimum wall thickness and the uniformity of the wall thickness of the inner ring are improved, the inner ring of the bearing can be tightly matched with the spindle, and the running stability of the spindle is prevented from being influenced due to relative sliding of the spindle and the spindle bearing. In some embodiments, the inner diameter cone angle of the inner ring is 3-15 °. In some embodiments, the outer diameter surface of the outer race is tapered, the outer diameter of the outer race tapering from the larger inner diameter end of the outer race to the smaller inner diameter end. In some embodiments, the outer race outer diameter taper angle is 3-15 °. Drawings One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated. FIG. 1 is a schematic view of a tapered roller bearing according to some embodiments of the present application; FIG. 2 is a schematic illustration of a shafting structure provided in some embodiments of the present application; FIG. 3 is an enlarged schematic view of the structure of FIG. 2 at A; fig. 4 is an enlarged schematic view of the structure at B in fig. 2. Detailed Description For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the following detailed description of the embodiments of the present application will be given with reference to the accompanying drawings. However, those of ordinary skill in the art will understand that in various embodiments of the present application, numerous technical details have been set