Reference vibrator for an unbalance measurement device

A reference vibrator that is mounted to an unbalance measurement device for a rotary product having a rotor inside, and applies vibrations for repeatability check to the unbalance measurement device, the reference vibrator comprising:

• (a) a vibrator body configured to be mounted to a mount in the unbalance measurement device for mounting the rotary product, in a same mounting state as the rotary product;
• (b) a vibration generator that is fixed to the vibrator body and applies vibrations to the vibrator body;
• and
• (c) a control unit that controls the vibration generator,
• wherein the vibration generator is a unidirectional vibrator that generates a unidirectional vibration force, and wherein a force sensor is provided between the vibrator body and the unidirectional vibrator.

A reference vibrator that is mounted to an unbalance measurement device for a rotary product having a rotor inside, and applies vibrations for repeatability check to the unbalance measurement device, the reference vibrator comprising:

• (a) a vibrator body configured to be mounted to a mount in the unbalance measurement device for mounting the rotary product, in a same mounting state as the rotary product, wherein a gravity center position of the vibrator body is set to be equivalent to a gravity center position of the rotary product that is to have vibrations applied for repeatability check to the unbalance measurement device;
• (b) a vibration generator that is fixed to the vibrator body and applies vibrations to the vibrator body;
• and
• (c) a control unit that controls the vibration generator;
• wherein two vibration generators are fixed to the vibrator body so that vibration directions of the two vibration generators cross each other at right angles, and
• wherein the control unit controls the two vibration generators so as to form a Lissajous circle of a vibration force.

A reference vibrator that is mounted to an unbalance measurement device for a rotary product having a rotor inside, and applies vibrations for repeatability check to the unbalance measurement device, the reference vibrator comprising:

• (a) a vibrator body configured to be mounted to a mount in the unbalance measurement device for mounting the rotary product, in a same mounting state as the rotary product;
• (b) a vibration generator that is fixed to the vibrator body and applies vibrations to the vibrator body;
• and
• (c) a control unit that controls the vibration generator,
• wherein the vibration generator is a unidirectional vibrator that generates a unidirectional vibration force, wherein the unidirectional vibrator is an inertial vibrator that generates a vibration force by a reaction force of vibrations of an inertial mass, and wherein a force sensor is provided between the vibrator body and the unidirectional vibrator.

A reference vibrator that is mounted to an unbalance measurement device for a rotary product having a rotor inside, and applies vibrations for repeatability check to the unbalance measurement device, the reference vibrator comprising:

• (a) a vibrator body configured to be mounted to a mount in the unbalance measurement device for mounting the rotary product, in a same mounting state as the rotary product, wherein a gravity center position of the vibrator body is set to be equivalent to a gravity center position of the rotary product that is to have vibrations applied for repeatability check to the unbalance measurement device;
• (b) a vibration generator that is fixed to the vibrator body and applies vibrations to the vibrator body, wherein the vibration generator is a unidirectional vibrator that generates a unidirectional vibration force;
• and
• (c) a control unit that controls the vibration generator;
• wherein two vibration generators are fixed to the vibrator body so that vibration directions of the two vibration generators cross each other at right angles, and
• wherein the control unit controls the two vibration generators so as to form a Lissajous circle of a vibration force.

A reference vibrator that is mounted to an unbalance measurement device for a rotary product having a rotor inside, and applies vibrations for repeatability check to the unbalance measurement device, the reference vibrator comprising:

• (a) a vibrator body configured to be mounted to a mount in the unbalance measurement device for mounting the rotary product, in a same mounting state as the rotary product, wherein a gravity center position of the vibrator body is set to be equivalent to a gravity center position of the rotary product that is to have vibrations applied for repeatability check to the unbalance measurement device;
• (b) a vibration generator that is fixed to the vibrator body and applies vibrations to the vibrator body, wherein the vibration generator is a unidirectional vibrator that generates a unidirectional vibration force, and wherein the unidirectional vibrator is an inertial vibrator that generates a vibration force by a reaction force of vibrations of an inertial mass;
• and
• (c) a control unit that controls the vibration generator;
• wherein two vibration generators are fixed to the vibrator body so that vibration directions of the two vibration generators cross each other at right angles, and
• wherein the control unit controls the two vibration generators so as to form a Lissajous circle of a vibration force.