Combined bearing used for vertical epicyclic gearbox of nuclear power circulating water pump

Abstract

The invention discloses a combined bearing used for a vertical epicyclic gearbox of a nuclear power circulating water pump. The combined bearing comprises a thrust bearing (1), a flexible support block (2), a radial bearing (3), a thrust bearing seat (4) and a radial bearing seat (5); the thrust bearing (1) radially penetrates through the thrust bearing seat (4) and presses on the flexible supporting block (2); an adjusting bolt (6) radially penetrates through the radial bearing seat (5) and presses on the radial bearing (3); and adjusting curved support structures are arranged between the thrust bearing (1) and the flexible support block (2), and between the radial bearing (3) and the radial bearing seat (5). In the invention, a combined bearing with large bearing capacity, long service life and easiness of disassembly and maintenance is provided; the combined bearing is used for supporting a planetary carrier and bearing large thrust and radial force generated by operation of a circulating water pump, and ensuring that the gear stands under load and the bearing is subjected to uniform stress through self-adjustment.

Description

technical field [0001] The invention relates to a combined bearing device for a gear box, which is mainly used in the field of vertical planetary gear transmission of nuclear power circulating water pumps. Background technique [0002] Combined bearings for nuclear power circulating water pump vertical planetary gearboxes are installed at the bottom of the planetary frame. The role of the bearing is to support the planetary frame of the gearbox and ensure the normal meshing of the planetary gear system. At the same time, the combined bearing also bears the large thrust and radial force generated when the circulating water pump is running. The combined bearing needs to have the characteristics of large load capacity, long service life, good load equalization effect, and easy disassembly and maintenance. [0003] In the current gearbox system, the thrust bearings in the combined bearings all adopt oblique-plane rigid support structures. This structure has the following limit...

AI Technical Summary

Problems solved by technology

This structure has the following limitations: (1) The position of the bearing surface of the thrust bearing remains fixed during operation, and it is difficult for each thrust pad to form a uniform oil gap during the operation of the equipment; (2) Since the thrust bearing supports the planet carrier, each There is a difference in the actual processing height of the thrust bearing, resulting in uneven load on the thrust bearing and offset of the horizontal position of the planet carrier, thus affecting the correct meshing of the gears

This structure has the following limitations: (1) It is inconvenient to disassemble and maintain; (2) It is difficult to adjust the assembly oil clearance, and it is difficult to reduce the error between the rotation center and the geometric center of the planet carrier when the gearbox is running; The effect is not ideal; (4) The heat dissipation effect of the bearing is not ideal

Due to the above limitations, during the operation of the gearbox, the rotation center of the planetary carrier is eccentric, resulting in uneven meshing of the planetary gears and high noise in the gearbox system

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