STATE MONITORING DEVICE FOR ROTARY MACHINE

PROBLEM TO BE SOLVED: To accurately detect occurrence of misalignment of a rotation shaft.SOLUTION: A state monitoring device 80 comprises a light projecting part 83, a light receiving part 81, a rotation detection plate 84 and a monitoring part 88. The light projecting part 83 is fixed at a non-rotation portion of a speed-increasing gear 40 rotatably supporting an output shaft 62. The light receiving part 81 is fixed at a non-rotation part of a power generator 50 rotatably supporting an input shaft 61 and receives light from the light projecting part 83. The rotation detection plate 84 is placed between the light projecting part 83 and the light receiving part 81 and attached to the input shaft 61. The rotation detection plate 84 rotates together with the input shaft 61 when the input shaft 61 rotates and repeats the state of blocking light from the light projecting part 83 toward the light receiving part 81 and the state of making light from the light projecting part 83 toward the light receiving part 81 penetrate therethrough.SELECTED DRAWING: Figure 3 【課題】回転軸のミスアライメントの発生を正確に検出する。【解決手段】状態監視装置８０は、投光部８３と、受光部８１と、回転検出板８４と、監視部８８とを含む。投光部８３は、出力軸６２を回転可能に支持する増速機４０の非回転部分に固定される。受光部８１は、入力軸６１を回転可能に支持する発電機５０の非回転部分に固定され、投光部８３からの光を受ける。回転検出板８４は、投光部８３と受光部８１との間に配置され、入力軸６１に取り付けられる。回転検出板８４は、入力軸６１が回転すると、入力軸６１と共に回転し、投光部８３から受光部８１に向かう光を遮断する状態と、投光部８３から受光部８１に向かう光を透過する状態とを繰り返すように構成される。【選択図】図３