CN204403137U - A kind of large megawatt rolling element bootstrap retainer double-row conical bearing - Google Patents

Abstract

A double-row tapered roller bearing with a large megawatt rolling element self-guiding cage relates to the field of double-row tapered roller bearings. The bearing includes a double-race outer ring, an inner ring, a cage and rolling elements. In the ring raceway formed by the double raceway outer ring and inner ring; the cage adopts a segmented structure, and each segment of the cage is provided with four pockets, and each rolling body is placed in a pocket. The beneficial effects of the utility model are: the segmented cage design structure is adopted, which reduces the difficulty of design and installation; The design method of adjustment ensures that the total clearance of the cage is within a reasonable range.

Description

A self-guiding cage double-row tapered roller bearing with large megawatt rolling elements

technical field

The utility model relates to a large megawatt rolling body self-guiding cage double-row tapered roller bearing, which is mainly used in the wind power industry and is used on the main shaft of a large megawatt fan.

Background technique

With the development of my country's wind power industry, the price of complete wind turbines and market competition are fierce, and small-power wind turbines have gradually lost their competitive advantage. Domestic complete machine manufacturers are eager to develop high-power wind turbines of 3.0MW and above. At present, main engine manufacturers occupying an absolute share in the domestic market, such as Jinfeng Technology, Guodian United Power, Guangdong Mingyang, Chongqing Haizhuang, etc., have all shifted their research and development direction to 3.0-5.0MW high-power units.

At present, the main shaft bearings of high-power wind turbines all rely on foreign imports, and the price of foreign main shaft bearings is high, and the delivery cycle is long, which restricts the development of domestic high-power wind turbines. As a leading enterprise of domestic bearings, it is obligatory to undertake the research and development task of shaft bearings for high-power main wind turbine generators. Among them, the cage has always been one of the important factors restricting the development of large megawatt spindle bearings.

Utility model content

In order to solve technical problems such as bearing load, large size, and easy damage to the cage, the utility model provides a double-row tapered roller bearing with a large megawatt rolling element self-guiding cage.

The technical scheme that the utility model solves the technical problem that takes is as follows:

A double-row tapered roller bearing with large megawatt rolling element self-guiding cage, which includes a double-race outer ring, an inner ring, a cage and rolling elements, and the rolling elements are formed by placing the double-race outer ring and inner ring through the cage In the ferrule raceway; the cage adopts a segmented structure, and each cage has four pockets, and each rolling element is placed in a pocket.

The beneficial effects of the utility model are: the segmented cage design structure is adopted, which reduces the difficulty of design and installation; The design method of adjustment ensures that the total clearance of the cage is within a reasonable range.

Description of drawings

Fig. 1 is a structural schematic diagram of a double-row tapered roller bearing with a self-guiding cage of a large megawatt rolling element of the present invention.

Fig. 2 is a structural schematic diagram of the combination of rolling elements and cages in the present invention.

Fig. 3 is a schematic diagram of the shaft side structure of the cage in the utility model.

Fig. 4 is a schematic diagram of the shaft side structure of the last section of the cage in the utility model.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail.

As shown in Figures 1 to 4, the large megawatt rolling body self-guiding cage double row tapered roller bearing of the present invention includes a double raceway outer ring 1, an inner ring 2, a cage 3 and a rolling body 4, and the rolling body 4 The cage 3 is placed in the ring raceway formed by the double raceway outer ring 1 and the inner ring 2; the cage 3 adopts a segmented structure, and each segment of the cage 3 is provided with four pockets, and each rolling element 4 is placed in a pocket. As shown in Figure 4, the size of the last section of the cage 3 of the present invention can be adjusted and designed according to the size of the raceway of the bearing ring, for example, the size of A in Figure 4 can be adjusted. The pockets of the cage 3 and the rolling elements 4 adopt an arc surface contact design.

The large megawatt rolling element self-guiding cage double-row tapered roller bearing of the utility model has been proved by tests that it not only satisfies the requirements of the radial direction, axial direction and overturning moment, but also overcomes bearing burning, short life, Defects such as low precision, the service life reaches more than 175,000 hours.

Claims (3)

1. A large megawatt rolling element self-guiding cage double-row tapered roller bearing is characterized in that the bearing includes a double raceway outer ring (1), inner ring (2), cage (3) and rolling elements ( 4), the rolling element (4) is placed in the ring raceway formed by the double raceway outer ring (1) and inner ring (2) through the cage (3); the cage (3) adopts a segmented structure, and each segment maintains The frame (3) is provided with four pockets, and each rolling body (4) is placed in one pocket. 2. A large megawatt rolling element self-guiding cage double-row tapered roller bearing according to claim 1, characterized in that the size of the last section of the cage (3) is based on the size of the raceway of the bearing ring Size is adjusted for design. 3. A large megawatt rolling element self-guiding cage double-row tapered roller bearing according to claim 1, characterized in that the pockets of the cage (3) and the rolling elements (4) adopt circular arcs surface contact design.