Method and apparatus for evaluating vibrations of a rotary body while maintaining the rotary body in a static or non-rotational state
First Claim
1. A method for evaluating vibrations of a rotary body, comprising the steps of:
- maintaining the rotary body in a static or non-rotational state;
applying an exciting force to the rotary body by using a rotary vibrator, said exciting force being rotated about a shaft of the rotary body thereby causing a vibrational response from the rotary body;
sweeping a frequency of current supplied to said rotary vibrator from a low-frequency region to a high-frequency region so as to vary said vibrational response from the rotary body;
detecting said vibrational response from the rotary body by using at least one vibration sensor; and
measuring an output of said at least one vibration sensor.
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Abstract
A method and apparatus for evaluating the vibration of a rotary body in a static or non-rotational state to determine a profile of critical speeds including profiles of critical speeds which exist beyond a rated revolution velocity of the rotary body. This invention comprises: a plurality of bearings for maintaining the rotary body in a non-rotating or static condition; a rotary vibrator for applying an exciting force which is rotated about a shaft to the rotary body; a vibration sensor for detecting the vibration of the rotary body; a vibration meter for measuring an output from the vibration sensor; and a vibration power source for supplying AC power to the rotary vibrator and for sweeping a frequency of the exciting force applied from the rotary vibrator to the rotary body from a low-frequency region to a high-frequency region. Thus, the present invention obtains the vibrational characteristics of the rotary body in a simulated rotational or dynamic state in which the rotating body is actually maintained in a static or non-rotational state.
24 Citations
6 Claims
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1. A method for evaluating vibrations of a rotary body, comprising the steps of:
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maintaining the rotary body in a static or non-rotational state; applying an exciting force to the rotary body by using a rotary vibrator, said exciting force being rotated about a shaft of the rotary body thereby causing a vibrational response from the rotary body; sweeping a frequency of current supplied to said rotary vibrator from a low-frequency region to a high-frequency region so as to vary said vibrational response from the rotary body; detecting said vibrational response from the rotary body by using at least one vibration sensor; and measuring an output of said at least one vibration sensor. - View Dependent Claims (2)
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3. An apparatus for evaluating vibrations of a rotary body comprising:
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a plurality of bearings for maintaining the rotary body in a static or non-rotational state; a rotary vibrator for applying an exciting force to the rotary body by rotating said exciting force about a shaft of the rotary body to produce a vibrational response from the rotary body; at least one vibration sensor for detecting said vibrational response from the rotary body; a vibration meter for measuring an output from said at least one vibration sensor; and a vibration power source for supplying AC power to said rotary vibrator and for sweeping a frequency of current supplied to the rotary vibrator from a low-frequency region to a high-frequency region. - View Dependent Claims (4, 5, 6)
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Specification