Material wear indication system

• US 7,847,679 B2
• Filed: 10/26/2007
• Issued: 12/07/2010
• Est. Priority Date: 10/26/2007
• Status: Active Grant

• Current Assignee: Rolls-Royce Corporation (Rolls-Royce Holdings Plc)
• Original Assignee: Rolls-Royce Corporation (Rolls-Royce Holdings Plc)
• Inventors: Rubel, Joel, Harrison, Molly, Copeland, Andrew D.
• Primary Examiner(s): Mehmood; Jennifer
• Application Number:
  US11/977,963
• Publication Number:
  US 20090107795A1
• Time in Patent Office: 1,138 Days
• Field of Search: 340/453, 340/454, 190/30.W, 188/1.11 W, 188/1.11 I, 188/1.11 R
• US Class Current: 340/454
• CPC Class Codes: F16D 13/64 Clutch-plates; Clutch-lamellae brake-plates, brake-lamellae F16D65/12
• CPC Class Codes: F16D 13/648 for clutches with multiple lamellae
• CPC Class Codes: F16D 2300/18 Sensors; Details or arrangements thereof
• CPC Class Codes: F16D 2500/5118 Maintenance
• CPC Class Codes: F16D 2500/7101 Driver alarm

Abstract

A material wear indication system is provided that includes a friction plate capable of engaging a moving surface and a wear indicator. The friction plate includes a wearable portion and a non-wearable portion. In one embodiment the wear indicator is embedded in the non-wearable portion and is prevented from contacting the moving surface until the wearable surface has been sufficiently eroded. When the wear indicator contacts the moving surface it emits a particulate matter that can be detected by a sensor. The sensor is operable to generate an electrical signal that is transmitted to a control unit when the wearable surface has eroded thereby exposing the wear indicator to the moving surface.

Claims

1. An apparatus comprising:

a friction plate having a wear surface, and a wear indicator that emits the particulate matter to provide a wear indication when the wear surface of the friction plate has been eroded to an emission level; and

a sensor operable to detect the particulate matter.

2. The apparatus of claim 1, which further includes a wear indicator coupled with the friction plate and operable to emit the particulate matter when engaged with the moving surface.

3. The apparatus of claim 2, wherein the wear indicator is composed of a substance selected from the group consisting of ferrous material, colored material, and a gas emitting material.

4. The apparatus of claim 1, wherein the wear indicator is prevented from being exposed to the moving surface until a wearable portion of the friction plate has been removed.

5. The apparatus of claim 1, wherein the sensor is selected from a group consisting of a magnet, an optical sensor, and a gas sensor.

6. The apparatus of claim 1, which further includes a housing at least partially enclosing the friction plate and having an aperture through which at least some of the particulate matter passes.

7. The apparatus of claim 1, which further includes a control unit connected with the sensor and, wherein the sensor is operable to generate a signal that indicates the presence of particulate matter.

8. An apparatus comprising:

a friction plate;

a wear indicator coupled with the friction plate and emits a particulate matter to provide a wear indication; and

a control device configured to receive a wear indication signal based upon a presence of the particulate matter.

9. The apparatus of claim 8, wherein the friction plate includes a wearable portion and a non-wearable portion, the wear indicator oriented to emit a particulate matter when the wearable portion is worn to a predetermined level.

10. The apparatus of claim 9, wherein the wearable portion and non-wearable portion are connected together to form the friction plate.

11. The apparatus of claim 9, wherein at least a portion of the wear indicator extends into the non-wearable portion.

12. The apparatus of claim 8, wherein the wear indicator is composed of a substance selected from the group consisting of ferrous material and a colored material.

13. The apparatus of claim 8, which further includes an assembly of friction plates and wear indicators, wherein the wear indicators are coupled with the friction plates.

14. The apparatus of claim 8, which further includes a sensor operable to detect the emitted particulate material, the sensor in communication with the control device and provides the wear indication signal to the control device, the wear indication signal representative of the presence of the solid particulate matter.

15. An apparatus comprising:

a plurality of friction plates;

a wear indicator embedded in the plurality of friction plates and emits particulate matter; and

wherein the particulate matter provides a wear indication via a sensor operable to detect the particulate matter.

16. The apparatus of claim 15, wherein each of the plurality of friction plates includes a wear indicator.

17. The apparatus of claim 16, wherein each of the wear indicators emit different particulate matter.

18. A method, comprising:

engaging a wear surface with a friction surface of a friction plate device;

emitting a particulate matter as a result of the engaging; and

generating a wear signal due to the emission of particulate matter.

19. The method of claim 18 which further includes sensing the presence of the emitted particulate matter.