BEARING ARRANGEMENT FOR FLUID MACHINERY APPLICATION

摘要

A bearing arrangement for a fluid machinery application employing an axially locating bearing. The axially locating bearing includes: a first angular self-aligning contact bearing arranged next to a second angular self-aligning contact bearing. Each of the first angular self-aligning contact bearing and the second angular self-aligning contact bearing includes a set of rolling elements arranged in a row and interposed between a respective curved inner raceway and an associated curved outer raceway. Each roller is a symmetrical cylindrically-shaped roller having a curved raceway-contacting surface. Each roller is inclined respective to the axial direction of the shaft by a respective contact angle. The rollers support an axial force and a radial force. The axially non-locating bearing position is arranged spaced apart from the axially locating bearing position, as seen in the axial direction. Examples of fluid machinery applications include: a wind turbine, water turbine or a propulsion turbine.

主权项

1. A bearing arrangement for a fluid machinery application having an axially locating bearing position and an axially non-locating bearing position, the axially locating bearing position comprising:
a first angular self-aligning contact bearing arranged next to a second angular self-aligning contact bearing for locating a shaft against movement in an axial direction; the first angular self-aligning contact bearing having a first set of rolling elements formed of rollers arranged in a first row and interposed between a first curved inner raceway and a first curved outer raceway, wherein each roller is a symmetrical cylindrically shaped roller having a curved raceway-contacting surface being engageable with the first curved inner raceway and the first curved outer raceway, wherein each roller of the first angular self-aligning contact bearing is inclined in relation to the axial direction of the shaft by a first contact angle; whereby the rollers are arranged to cooperate with the first curved inner raceway and the first curved outer raceway for supporting an axial force and a radial force; and the second angular self-aligning contact bearing having a second set of rolling elements formed of rollers arranged in a second row and interposed between a second curved inner raceway and a second curved outer raceway, wherein each roller is a symmetrical cylindrically shaped roller having a curved raceway-contacting surface being engageable with the second curved inner raceway and the second curved outer raceway, wherein each roller of the second angular self-aligning contact bearing is inclined in relation to the axial direction of the shaft by a second contact angle; whereby the rollers are arranged to cooperate with the second curved inner raceway and the second curved outer raceway for supporting the axial force and the radial force; wherein each roller of the first angular self-aligning contact bearing is inclined in relation to each roller of the second angular self-aligning contact bearing such that a first pressure centre of the first angular self-aligning contact bearing is displaced from a second pressure centre of the second angular self-aligning contact bearing; wherein the axially non-locating bearing position is arranged spaced apart from the axially locating bearing position, as seen in the axial direction.