ROTOR BLADE LIFE EVALUATING DEVICE AND METHOD AND AXIAL BLOWER

Japanese Patent JP3492339

B2

PROBLEM TO BE SOLVED: To predict the life of each rotor blade by measuring the distance between each rotor blade of rotating equipment with the rotor blades such as an axial blower, etc., and a casing, a wall surface, or the like in real time and obtaining the amount of creep of each rotor blade on the basis of the measured value.
SOLUTION: In the axial blower with a wheel chamber including a plurality of the rotor blades 2 mounted to an impeller on a rotating shaft, this rotor blade life evaluating device is provided with both a clearance sensor 8 arranged in a casing of the wheel chamber for measuring a clearance between the rotor blades 2 with a metal or magnetic part 7 at the tip of at least one rotor blade 2 and the wheel chamber 5-1; and a control unit 10 for computing the lengths of the rotor blades 2 on the basis of the results of the clearance measurement, the clearance initial value, and the initial lengths of the rotor blades 2, and evaluating the lives of the rotor blades 2 on the basis of changes with time in total distortion computed on the basis of the lengths of the rotor blades 2.

WO/1995/010020	MAGNETORESISTIVE LINEAR DISPLACEMENT SENSOR, ANGULAR DISPLACEMENT SENSOR, AND VARIABLE RESISTOR
JP3273516	METHOD FOR MEASURING GAP BETWEEN MAGNETIC ROLL AND ADJUSTING BAR

Tadashi Yoshida
Katsunori Komori
Nozomi Kawasetsu
Katsuhiko Takita
Mitsunari Goto
Masanori Koga

JP2001235542A

February 03, 2004

August 02, 2001

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MITSUBISHI HEAVY INDUSTRIES,LTD.

G01B7/14; F04D29/00; F04D29/38; G01B7/00; G01B21/16; (IPC1-7): G01B7/14; F04D29/00

JP7198312A
JP200132724A
JP2000356198A

Minoru Kudo

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