Bearing temperature-monitoring device and bearing device with the same

Abstract

A bearing temperature-monitoring device and a bearing device with the bearing temperature-monitoring device. In the bearing temperature-monitoring device, occurrence of flaws on a rotating shaft caused by contact between the shaft and a metal temperature-sensing member facing the surface of a bearing member is prevented.This prevents a reduction in bearing-load carrying ability caused by the flaws and also prevents damage on the rotating shaft induced by the flaws. As a result, reliability of the bearing temperature-monitoring device is enhanced. The bearing member has an installation hole bored in the bearing member so as to penetrate to its inner surface; the temperature-sensing member relatively movably fitted in the installation hole to cause a temperature detection end surface to face a bearing surface of the bearing member, having a projection amount-limiting section for limiting the amount of projection of the temperature-sensing member to the bearing surface side, and formed from a material having a higher heat conduction rate than the bearing member; a pressing member for pressing the temperature-sensing member to the bearing member side such that the temperature-sensing member is movable by a specific amount from a projection amount limitation position to the side opposite the bearing surface; and a temperature detector electrically connected to the temperature-sensing member and detecting the temperature of the temperature-sensing member.

Description

technical field [0001] The present invention relates to a bearing temperature monitoring device for monitoring the temperature of a bearing in which a bearing member made of a resin material is fixed inside a lining metal member, and a bearing device provided with the bearing temperature monitoring device. Background technique [0002] In the radial journal bearings or thrust bearings of high-speed rotating shafts such as steam turbines and gas turbines, the inner side of the lining metal parts (the inner side refers to the shaft end surface side or the inner circumference of the sliding parts facing the inside of the machine) Surface side) A bearing with a bearing component made of resin material fixed. The resin material bearing of the high-speed rotating shaft has a large temperature rise caused by the high-speed rotation of the shaft, and the thermal conductivity of the resin material is lower than that of copper alloy bearings such as white metal. Therefore, it is requ...

AI Technical Summary

Problems solved by technology

[0009] Moreover, in Figure 9 In the technology of Patent Document 1 shown, the metal part 03d for temperature measurement is set so that its front end surface is the same as the inner surface of the bearing member 02, and it is fixed to the bearing member 02 for installation. Therefore, due to the bearing load The amount of compression caused by the bearing part 02 made of resin material becomes larger, such as Figure 9 As indicated by the protrusion amount B shown by the dotted line, the metal piece 03d for temperature measurement protrudes relatively from the surface of the bearing member 02 to the side of the rotating shaft, protruding, causing damage to the rotating shaft, lowering the load capacity of the bearing, and, may also cause the damage to cause damage to the rotating shaft

Images