Device and method for monitoring the vibratory condition of a rotating machine
First Claim
1. A device for monitoring the vibration generated by a bearing in a machine, the device comprising:
- two coaxial rings, one outer ring (1) and one inner ring (2), one of which is fixed in relation to the structure of the machine, and the other rotating;
at least one rolling element (3) moveably positioned between the outer and inner ring;
at least two conducting elements forming conducting plates (5, 6) of at least one capacitor, one plate (5) positioned at a distance from another plate (6) formed by a conducting part of the rotating ring;
at least one non-conducting positioning means (4) connected to one of the rings that is fixed in relation to the structure of the machine, the non-conducting positioning means (4) having at least one housing for positioning at least one conducting element; and
at least one partitioning means (8) supporting the non-conducting positioning means (4) to define a space (7) between the plates (5, 6), the space forming a dielectric insulating medium, the partitioning means forming a sealed enclosure for the insulating medium (7) by contacting a part of the surface of the rotating ring;
wherein vibrations generated by other components of the machine pass through the bearing, with each of the other components of the machine having its own frequency signature; and
wherein the bearing defines an axis of rotation (Z-Z).
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Accused Products
Abstract
This present invention is a device having a mechanical bearing formed by two coaxial rings, one fixed relative to the machine and the other rotating, between which at least one rolling element is moveably positioned, at least one non-conducting positioning arrangements secured to the fixed bearing ring, the positioning arrangements including at least one placement holder for at least one conducting element forming a first plate of a capacitor, at a distance from a conducting part of the rotating ring forming the second plate of the capacitor, and with the positioning arrangements attached to at least one partitioning arrangements, the partitioning arrangements being used to create a space between the two plates, thus forming a dielectric insulating medium, and to act as a sealed enclosure for this insulating medium by being in contact with a part of the surface of the rotating ring.
10 Citations
23 Claims
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1. A device for monitoring the vibration generated by a bearing in a machine, the device comprising:
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two coaxial rings, one outer ring (1) and one inner ring (2), one of which is fixed in relation to the structure of the machine, and the other rotating; at least one rolling element (3) moveably positioned between the outer and inner ring; at least two conducting elements forming conducting plates (5, 6) of at least one capacitor, one plate (5) positioned at a distance from another plate (6) formed by a conducting part of the rotating ring; at least one non-conducting positioning means (4) connected to one of the rings that is fixed in relation to the structure of the machine, the non-conducting positioning means (4) having at least one housing for positioning at least one conducting element; and at least one partitioning means (8) supporting the non-conducting positioning means (4) to define a space (7) between the plates (5, 6), the space forming a dielectric insulating medium, the partitioning means forming a sealed enclosure for the insulating medium (7) by contacting a part of the surface of the rotating ring; wherein vibrations generated by other components of the machine pass through the bearing, with each of the other components of the machine having its own frequency signature; and wherein the bearing defines an axis of rotation (Z-Z). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for monitoring the vibration generated by a bearing in a machine, the bearing formed by two rings, one fixed and the other rotating, the device having at least one capacitive sensor, the vibration generated by other components of the machine passing through the bearing, the method comprising the step of:
measuring the induced charges by capacitive coupling to a first conducting plate (5) of a variable-gap capacitor positioned by a non-conducting positioning means attached to the ring that is fixed in relation to the structure, with a second conducting plate (6) formed by a part of the surface of the rotating ring of the bearing being at a fixed potential. - View Dependent Claims (19, 20, 21, 22, 23)
Specification