BLADE IRREGULARITY DETECTION DEVICE, BLADE IRREGULARITY DETECTION SYSTEM, REVOLVING MACHINE SYSTEM, AND BLADE IRREGULARITY DETECTION METHOD

• Main Authors: SATO TAKASHI, SABURI SEIJI, NAKANIWA TERUHIRO
• Format: Patent
• Language: English; Japanese
• Published: 25.10.2018
• Subjects: MEASURING; PHYSICS; TESTING; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR

PROBLEM TO BE SOLVED: To provide a blade irregularity detection device that can easily detect irregularity of revolving blades.SOLUTION: A blade irregularity detection device comprises: an acceleration information acquisition unit 53 that acquires acceleration information on a steam turbine; a revolving position information acquisition unit 54 that acquires revolving position information on a revolving shaft; a valve information acquisition unit 52 that acquires valve information indicative of an opening/closing state of a plurality of opening/closing valves; a partial load determination unit 55 that determines whether only one opening/closing valve of the plurality of opening/closing valves is a partial load state put into an opening state on the basis of the valve information; a blade irregularity determination unit 56 that, when the partial load determination unit determines that the one opening/closing valve is in the partial load state, determines presence or absence of irregularity of a first-step revolving blade row on the basis of a time sequence of the acceleration information; and a blade identification unit 57 that, when it is determined that the first-step revolving blade row is irregular, identifies the revolving blade having the irregularity generated from the first-step revolving blade row on the basis of the revolving position information.SELECTED DRAWING: Figure 4 【課題】動翼の異常を容易に検出することができる翼異常検出装置を提供する。【解決手段】蒸気タービンの加速度情報を取得する加速度情報取得部５３と、回転軸の回転位置情報を取得する回転位置情報取得部５４と、複数の開閉弁の開閉状態を示す弁情報を取得する弁情報取得部５２と、弁情報に基づいて、複数の開閉弁のうち一の開閉弁のみが開状態とされた部分負荷状態であるか否かを判断する部分負荷判断部５５と、該部分負荷判断部が、部分負荷状態であると判断した場合に、加速度情報の時系列に基づいて一段目の動翼列の異常の有無を判断する判断する翼異常判断部５６と、一段目の動翼列が異常であると判断された場合に、回転位置情報に基づいて一段目の動翼列から異常が発生した動翼を特定する翼特定部５７と、を備える。【選択図】図４