Large-scale water-lubricating thrust bearing three-section bushing surface

Abstract

The invention relates to a large-scale water-lubricating thrust bearing three-section bushing surface which is characterized in that the width of a water-inlet edge wedge-shaped bevel is the same as that of a water-outlet edge wedge-shaped bevel; the maximum values delta of the water-inlet edge wedge-shaped bevel and the water-outlet edge wedge-shaped bevel are consistent; the bushing surface, the water-inlet edge wedge-shaped bevel and the water-outlet edge wedge-shaped bevel are all plane; a circumferential micro-convex surface is defined by three sections, namely the bushing surface, the water-inlet edge wedge-shaped bevel and the water-outlet edge wedge-shaped bevel; and when starting up, the bushing surface of a thrust bearing is provided with a wedge-shaped water film required for operation, thereby quickly achieving a dynamic lubricating effect and reducing abrasion in a start-up transition process. As the bushing surface is designed to be a micro-convex surface, the water film can be formed in a start-up process and the bearing capacity of the thrust bearing can be improved; as the cylindrical bushing surface is provided with a wedge-shaped water film required for operation when starting up, the dynamic lubricating effect can be quickly achieved and the abrasion in the start-up transition process of the bushing surface can be reduced; the bushing surface has a certain plane, so that the weight of a rotor can be borne by the thrust bearing when the bushing surface is in a shut-down state; and the bushing surface is applicable to thrust bearings for nuclear power main pump motors and other various fields.

Description

technical field [0001] The invention relates to a three-section tile surface of a large-scale water-lubricated thrust bearing. Background technique [0002] The thrust bearing is one of the most important components in the main pump motor of nuclear power, and its working performance is directly related to the safe operation of the unit. With the improvement of the operating reliability of nuclear power equipment, the requirements for thrust bearings are also higher. The AP1000 main pump motor in the large-scale third-generation nuclear power plant uses imported bearings. In the process of independently developing the CAP1400 main pump motor, the foreign procurement of bearings is limited, which involves the development and verification of bearings. The ultra-high requirement of 60 years of maintenance-free requires a special design of the thrust bearing. For large water-lubricated thrust bearings, in order to improve the bearing capacity of the thrust bearing and reduce t...

AI Technical Summary

Problems solved by technology

The AP1000 main pump motor in large-scale third-generation nuclear power plants uses imported bearings. In the process of independently developing the CAP1400 main pump motor, the purchase of bearings from abroad is limited, which involves the development and verification of bearings.

Images