BLADE VIBRATION MONITORING DEVICE AND ROTARY MACHINERY SYSTEM

• Main Author: SABURI SEIJI
• Format: Patent
• Language: English; Japanese
• Published: 13.09.2018
• Subjects: AIR INTAKES FOR JET-PROPULSION PLANTS; BLASTING; COMBUSTION ENGINES; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS; ENGINE PLANTS IN GENERAL; GAS-TURBINE PLANTS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MACHINES OR ENGINES IN GENERAL; MEASURING; MECHANICAL ENGINEERING; NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES; PHYSICS; STEAM ENGINES; TESTING; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR; WEAPONS

PROBLEM TO BE SOLVED: To allow for easily monitoring vibration of a rotary blade-row group.SOLUTION: A blade vibration monitoring device is provided herein for rotary machinery comprising a rotor having a rotary blade-row group comprised of a plurality of rotary blade rows arranged spaced apart from each other on an outer periphery of a rotary shaft that is configured to rotate about a rotational axis, bearings configured to support the rotary shaft in a manner that allows the shaft to rotate about the rotational axis, bearing stands that support the bearings; and a stator surrounding the rotor. The blade vibration monitoring device includes a vibration detection unit 40 comprising a plurality of vibrators 41 of different natural frequencies connected to an outer surface of a steam turbine, and a vibration detection element provided on each of the vibrators 41.SELECTED DRAWING: Figure 2 【課題】動翼列群の振動を容易に監視する。【解決手段】軸線回りに回転する回転軸の外周に軸線方向に間隔をあけて設けられた複数の動翼列からなる動翼列群を有するロータ、回転軸を軸線回りに回転可能に支持する軸受、該軸受を支持する軸受台、及び、ロータを囲うステータを有する回転機械の翼振動監視装置であって、蒸気タービンの外面に接続された互いに固有振動数の異なる複数の振動体４１と、各振動体４１にそれぞれ設けられた振動検出素子と、を有する振動検出部４０を備える。【選択図】図２