Parabolic pad guide bearing for main shaft of vertical water turbine

Abstract

The invention relates to a parabolic pad guide bearing for a main shaft of a vertical water turbine, which is characterized in that: a bearing base is arranged on the top cover of the water turbine; a bearing body consisting of four circular arc bodies is fixed on the bearing base; a bearing bush of the main shaft is embedded in the bearing body; the bearing bush takes the shape of a parabolic surface; a rotating oil basin which is positioned at the lower end of the bearing body is arranged on the main shaft; an upper oil tank is welded at the upper end of the bearing base; an oil tank cover is sealed on the upper oil tank; a pitot tube is arranged on the side wall of the bearing body; the lower end of the pitot tube is communicated with the rotating oil basin, while the upper end thereof is connected with a cooler which is arranged outside the upper oil tank by pipelines; and the oil outlet of the cooler is communicated with the upper oil tank by pipelines. The invention solves the problem that the cooler is inconvenient for maintenance. The bearing bush on the bearing body can directly face to the polished journal of the main shaft and the main shaft does not need to be provided with a shaft neck or an enlarged diameter. In addition, the invention has the advantages of simple structure, easy manufacture, being capable of bearing large radial force.

Description

technical field [0001] The invention relates to a water turbine main shaft bearing, in particular to a vertical water turbine main shaft parabolic pad guide bearing. Background technique [0002] At present, the guide bearing of the vertical water turbine mainly bears the radial force of the rotating part, so that the radial swing does not occur when the main shaft rotates. The more commonly used structure of the vertical turbine guide bearing is the cylindrical bearing. The traditional structure of the cylindrical bearing is: the main shaft bearing body is installed on the top cover of the water turbine, the upper oil tank and the oil tank cover are installed on the upper end of the bearing body, the lubricating oil cooler is installed in the upper oil tank, and the rotating shaft rotating with the main shaft is installed on the lower end of the bearing body. An oil basin, the lower end of the bearing body is formed with an oil inlet connected to the bearing bush, and an o...

AI Technical Summary

Problems solved by technology

This kind of bearing generally needs to be installed in the part where the diameter of the main shaft is increased, but for high water head units, the line speed is high, the temperature rises and the friction loss is large, so the cylindrical bearing is difficult to solve these problems, and the situation of burning tiles often occurs

In addition, it is inconvenient to clean the built-in cooler and replace the cooling pipe

Images