Vibrometer assembly, rotating machine, and vibrometer attachment method and removal method
View Patent ↗A vibrometer assembly including a vibrometer configured to measure vibration of a rotating shaft, includes: a probe of the vibrometer that is to be secured to a bearing device that supports the rotating shaft; a guide cylinder that is to be provided to a case so as to penetrate the case and protrude into the case, the case being located outside the bearing device; an attachment that is to be connected to the probe and inserted into the guide cylinder, and at least partially has a movable portion to allow the probe to be axially aligned with an inside securing portion in the bearing device; and an outside securing portion that secures the attachment to the guide cylinder or the case outside the case.
1. A vibrometer assembly including a vibrometer configured to measure vibration of a rotating shaft, comprising:
a probe of the vibrometer that is to be secured to a bearing device that supports the rotating shaft;
a guide cylinder that is to be provided to a case so as to penetrate the case and protrude into the case, the case being located outside the bearing device;
an attachment that is to be connected to the probe and inserted into the guide cylinder, and at least partially has a movable portion to allow the probe to be axially aligned with an inside securing portion in the bearing device; and
an outside securing portion that secures the attachment to the guide cylinder or the case outside the case.
2. The vibrometer assembly according to claim 1 , wherein
the inside securing portion includes a female thread that is provided in a housing of the bearing device to secure the probe, and
the outside securing portion includes a fixture that secures an end of the attachment to the guide cylinder outside the case.
3. The vibrometer assembly according to claim 2 , wherein the attachment has a plurality of joints arranged in a length direction of the guide cylinder.
4. The vibrometer assembly according to claim 2 , wherein a seal is provided to seal a radial gap between the guide cylinder and the attachment.
5. The vibrometer assembly according to claim 2 , comprising packing that is provided to the probe so as to be brought into close contact with an outer periphery of a conductor withdrawn through an inside of the attachment to an outside of the case.
6. The vibrometer assembly according to claim 2 , comprising a cap that is to be mounted to the guide cylinder or the case so as to cover the outside securing portion.
7. The vibrometer assembly according to claim 1 , wherein the attachment has a plurality of joints arranged in a length direction of the guide cylinder.
8. The vibrometer assembly according to claim 7 , wherein the attachment has a plurality of parts, the parts adjacent to each other in the length direction forming the plurality of joints by being coupled by pins at least four points, the pins for two of the four points being directed perpendicularly to the pins for the other two points.
9. The vibrometer assembly according to claim 8 , wherein a seal is provided to seal a radial gap between the guide cylinder and the attachment.
10. The vibrometer assembly according to claim 8 , comprising packing that is provided to the probe so as to be brought into close contact with an outer periphery of a conductor withdrawn through an inside of the attachment to an outside of the case.
11. The vibrometer assembly according to claim 8 , comprising a cap that is to be mounted to the guide cylinder or the case so as to cover the outside securing portion.
12. The vibrometer assembly according to claim 7 , wherein a seal is provided to seal a radial gap between the guide cylinder and the attachment.
13. The vibrometer assembly according to claim 7 , comprising packing that is provided to the probe so as to be brought into close contact with an outer periphery of a conductor withdrawn through an inside of the attachment to an outside of the case.
14. The vibrometer assembly according to claim 7 , comprising a cap that is to be mounted to the guide cylinder or the case so as to cover the outside securing portion.
15. The vibrometer assembly according to claim 1 , wherein a seal is provided to seal a radial gap between the guide cylinder and the attachment.
16. The vibrometer assembly according to claim 1 , comprising packing that is provided to the probe so as to be brought into close contact with an outer periphery of a conductor drawn through an inside of the attachment to an outside of the case.
17. The vibrometer assembly according to claim 1 , comprising a cap that is to be mounted to the guide cylinder or the case so as to cover the outside securing portion.
18. A rotating machine comprising:
a rotating shaft;
a bearing device; and
a case; and
a vibrometer assembly including a vibrometer configured to measure vibration of the rotating shaft,
the vibrometer assembly comprising:
a probe of the vibrometer that is to be secured to the bearing device that supports the rotating shaft;
a guide cylinder that is to be provided to the case so as to penetrate the case and protrude into the case, the case being located outside the bearing device;
an attachment that is to be connected to the probe and inserted into the guide cylinder, and at least partially has a movable portion to allow the probe to be axially aligned with an inside securing portion in the bearing device; and
an outside securing portion that secures the attachment to the guide cylinder or the case outside the case.
19. A method for attaching a vibrometer configured to measure vibration of a rotating shaft to a rotating machine including the rotating shaft, comprising:
a guiding step of inserting a probe of the vibrometer and an attachment connected to the probe from an outside of a case of the rotating machine into the case through a guide cylinder inserted into a through hole in the case, and making a distal end of the probe reach a bearing device that supports the rotating shaft;
an axially aligning step of moving a movable portion at least partially included in the attachment to axially align the probe with an inside securing portion in the bearing device;
an inside securing step of securing the probe to the bearing device inside the case; and
an outside securing step of securing the attachment to the guide cylinder or the case outside the case.
20. A method for removing a vibrometer configured to measure vibration of a rotating shaft from a rotating machine including the rotating shaft, comprising:
a step of, in a state in which: a probe of the vibrometer connected to an attachment enabled to move a movable portion for axially aligning the probe at least partially included in the attachment is secured to a bearing device that supports the rotating shaft; and the attachment is secured to a case of the rotating machine or a guide cylinder provided to the case to hold the attachment, releasing the attachment from the case or the guide cylinder outside the case;
a step of releasing the probe from the bearing device inside the case; and
a step of withdrawing the probe and the attachment to an outside of the case.