Device for adjusting elevation of bearing in rotating machinery on line

Abstract

The invention discloses a device for adjusting the elevation of a bearing in rotating machinery on line and belongs to the technical field of power machinery. The invention is characterized in that the elevation of a supported body can be changed by the relative movement of cone-shaped slide blocks; the device consists of a vertical plate, an upper slide block, a lower slide block, a lead screw rod, a base and a compressing piece, wherein, the contact surfaces of the upper slide block and the lower slide block have the same taper; the lower slide block is pulled by the lead screw rod, so that the lower slide block can move in the horizontal direction in the slide ways of the upper slide block and the base only; and the upper slide block is pushed by the lower slide block or the compressing piece, so that the upper slide block can move in the vertical direction along the slide way of the vertical plate. By guaranteeing the supporting stiffness of a bearing pedestal, the invention is applicable to the adjustment to the elevation of bearings in rotating machinery, such as engines, generators and compressors; the adjustment of the elevation can be made without shutting down the machine, using a crane or lifting the rotors and the bearing pedestal; and the device has the advantages of simple structure, convenient use and high adjustment accuracy.

Description

technical field [0001] The invention belongs to the technical field of power machinery and relates to an on-line adjustment device for bearing elevation of rotating machinery. Background technique [0002] In rotating machinery, such as engines, generators, compressors, etc., bearings are mainly used to support rotors. The elevation of bearings and the support stiffness of bearing housings have an important impact on the dynamic characteristics of the entire rotating machinery. In the past, the adjustment of the bearing elevation of rotating machinery was completed by adding gaskets under the bearing. Each adjustment required stopping the machine and using a crane to lift the rotor and bearing seat to complete. Sometimes this process had to be repeated several times to meet the requirements. accuracy. Although this ensures the rigidity of the bearing support, it consumes a lot of time and human resources, and the adjustment error of the elevation is also relatively large. ...

AI Technical Summary

Problems solved by technology

This method facilitates the adjustment of the bearing elevation, and is theoretically feasible, but in practice, there are two main problems: one is that the four slopes must have exactly the same taper, if the taper of a certain slope appears to be processed or installed The error will inevitably lead to the contact between the conical surfaces changing from surface contact to line contact; second, even if the taper of the four inclined surfaces is guaranteed, once there is a slight deviation in the starting and ending positions of the positive and negative threads at both ends of the rotating screw, the contact line contact

Therefore, there is a big problem in practical application to adjust the elevation of bearing support by this method

Images