Monitoring and controlling system with connectorless quick-change components

• US 6,523,383 B2
• Filed: 12/28/2000
• Issued: 02/25/2003
• Est. Priority Date: 12/28/2000
• Status: Active Grant

• Current Assignee: The Timken Company
• Original Assignee: The Timken Company
• Inventors: Lindsay, Kenneth W., Severyn, Raymond A., Beechy, David G., Rehfus, Kevin E., Joki, Mark A.
• Primary Examiner(s): TOLAN, EDWARD THOMAS
• Application Number:
  US09/750,958
• Publication Number:
  US 20020129633A1
• Time in Patent Office: 789 Days
• Field of Search: 72/101, 72/104, 72/122, 72/134, 72/144, 72/310.7, 340/682, 340/870.3, 384/448
• US Class Current: 72/13.4
• CPC Class Codes: F16C 19/52 with devices affected by abnormal or undesired conditions
• CPC Class Codes: G01D 21/00 Measuring or testing not otherwise provided for
• CPC Class Codes: G08C 17/04 using magnetically coupled devices
• CPC Class Codes: G08C 17/06 using capacity coupling

Abstract

A monitoring and controlling system for monitoring and controlling various operating characteristics of machine components. The monitoring and controlling system includes a primary transceiver, with sensors and control devices, mounted integrally with the monitored component. The primary transceiver communicates with a secondary transceiver and receives its electrical power from the secondary transceiver without use of interconnecting communication or power cables. The integrated mounting of the primary transceiver and sensors within the monitored component without the use of interconnecting cables allows for replacement of the monitored component in harsh operating environments without the risk of damage to interconnecting electrical connectors and cables. The operating data detected by the sensor for the monitored component is communicated by the primary transceiver and the secondary transceiver to a monitoring network which analyzes the data to determine the need for maintenance of the monitored component.

Claims

1. A millstand for rolling metal shapes, said millstand comprising:

a housing having a window lined with side faces;

a chock located within the window and having side faces presented toward the side faces on the housing;

a roll supported on the housing and having a body and a roll neck at the end of the body, with the roll neck extending into the chock;

an antifriction bearing located between the roll neck and the chock for enabling the roll to rotate relative to the chock and the housing, the antifriction bearing including an outer race fitted into the chock, an inner race fitted around the roll neck, and rolling elements located between the inner and outer races;

at least one sensor carried by the chock for sensing an operating condition of the antifriction bearing;

a chock transceiver carried by the chock capable of producing radio frequency signals that reflect conditions detected by the at least one sensor, and also capable of receiving radio frequency signals; and

a millstand transceiver positioned adjacent to the chock and being capable of transmitting radio signals to the chock transceiver and receiving radio frequency signals produced by the chock transceiver.

2. A millstand according to claim 1 and further comprising inductively transferring electrical energy from the millstand transceiver to the chock transceiver and using the electrical energy so transferred to produce the radio frequency signal.

3. A millstand according to claim 1 wherein the chock transceiver is electronically identified by a unique serial number.

4. A millstand according to claim 2 wherein the unique serial number is used to compile historical operating and maintenance data for the chock electronically identified by the unique serial number.

5. A millstand according to claim 1 wherein the at least one sensor detects the temperature of the antifriction bearing.

6. A millstand according to claim 5 wherein the at least one sensor detects the temperature of the outer race of the antifriction bearing.

7. A millstand according to claim 1 wherein the millstand transceiver is carried by the housing.

8. A millstand according to claim 7 wherein the chock contains a recess which opens out of one of its side faces, and the chock transceiver is in the recess;

and wherein the housing contains a recess in one of the side faces that line its window, with the recess in the housing opening toward the recess in the chock; and

wherein the chock transceiver is in the recess in the housing.

9. A millstand according to claim 7 or 8 wherein the chock transceiver and the millstand transceiver are inductively coupled to transmit electrical energy from the millstand transceiver to the chock transceiver to operate the chock transceiver.

10. The millstand according to claim 1 wherein the millstand includes a monitoring network which instructs the primary transceiver to generate a control signal to control an auxiliary component used to perform a maintenance function related to the operation of the millstand.

11. The combination comprising:

a roll having a body and a neck at the end of the body;

a chock receiving the neck;

an antifriction bearing located between the roll neck and the chock for enabling the roll to rotate relative to the chock, the bearing including an outer race fitted to the chock, an inner race fitted around the roll neck, and rolling elements located in at least one row between the inner and outer races;

a sensor carried by the chock and having the capacity to detect an operating condition of the antifriction bearing; and

a chock transceiver carried by the chock and being connected with the sensor, the chock transceiver being capable of producing and transmitting a radio frequency signal that reflects the operating condition of the antifriction bearing as detected by the sensor.

12. The combination according to claim 11 wherein the sensor detects the temperature of the outer race of the antifriction bearing.

13. The combination according to claim 12 wherein the sensor includes a probe which bears against the outwardly presented surface of the outer race for the antifriction bearing.

14. The combination according to claim 11 wherein the chock has a side face and a recess opening out of the side face, and the receiver is in the recess.

15. A process of monitoring and controlling the operation of a roll neck antifriction bearing that is fitted to a chock located in a housing of a millstand, said process comprising:

a. at the chock, sensing an operating characteristic of the roll neck antifriction bearing;

b. from within the chock, producing a radio frequency signal that reflects the operating characteristic of the roll neck antifriction bearing;

c. receiving the radio frequency signal at a location remote from chock;

d. using the radio frequency signal so received to assess a need for a maintenance task required for the roll neck antifriction bearing; and

e. transmitting a signal to the roll neck bearing to control an auxiliary component to perform a control function related to the roll neck antifriction bearing.

16. The process according to claim 15 wherein the radio frequency signal is received at the housing of the millstand.

17. The process according to claim 15 or 16 and further comprising:

a. inductively transferring electrical energy from the housing to the chock; and

b. using the electrical energy so transferred to produce the radio frequency signal.

18. The process according to claim 17, wherein said process further comprises:

a. transmitting a control signal from the remote location to the secondary transceiver;

b. receiving the control signal at the secondary transceiver;

c. transmitting the control signal from the secondary transceiver to the primary transceiver; and

d. using the control signal received by the primary transceiver to control an auxiliary component to perform a control function related to the monitored component.

19. The process of claim 18, wherein the transmitting of the control signal from the secondary transceiver to the primary transceiver is accomplished by transferring the control signal from the secondary transceiver through a pass through enclosure to the primary transceiver, the pass through enclosure being capable of transferring or relaying the control signal between the secondary transceiver and the primary transceiver.

20. The process according to claim 15 wherein the need for a maintenance task required for the rolling mill bearing is determined by a process of roll neck antifriction bearing temperature monitoring.

21. The process according to claim 20 wherein the process for bearing temperature monitoring is accomplished by comparing a predicted end temperature, the predicted end temperature calculated by combining a temperature rise over ambient and a temperature gradient for the roll neck antifriction bearing to a current temperature of the rolling mill bearing using the following equations:

$T=T<br><br>\text{\hspace{1em}<br><br>}<br><br>a+T<br><br>\text{\hspace{1em}<br><br>}<br><br>r<br><br>\text{\hspace{1em}<br><br>}<br><br>i<br><br>\text{\hspace{1em}<br><br>}<br><br>s<br><br>\text{\hspace{1em}<br><br>}<br><br>e<br><br>\left(1-e^{-\frac{1}{\mathrm{\tau <br><br>}}}\right)$$\frac{<br><br>T}{<br><br>t}=\frac{T<br><br>\text{\hspace{1em}<br><br>}<br><br>r<br><br>\text{\hspace{1em}<br><br>}<br><br>i<br><br>\text{\hspace{1em}<br><br>}<br><br>s<br><br>\text{\hspace{1em}<br><br>}<br><br>e}{\mathrm{\tau <br><br>}}<br><br>e^{-\frac{1}{\mathrm{\tau <br><br>}}}$$T<br><br>\text{\hspace{1em}<br><br>}<br><br>e=T+\frac{<br><br>T}{<br><br>t}<br><br>\mathrm{\tau <br><br>}$

Where;

T=current temperature indicated by the temperature sensors

Ta=ambient temperature

Trise=the ending temperature Te minus the ambient temperature Ta

τ

=the time constant of the system specific to the specific heat and the lumped heat transfer coefficient $\frac{<br><br>T}{<br><br>t}=\mathrm{slope}<br><br>\text{\hspace{1em}<br><br>}<br><br>\mathrm{of}<br><br>\text{\hspace{1em}<br><br>}<br><br>\mathrm{the}<br><br>\text{\hspace{1em}<br><br>}<br><br>\mathrm{current}<br><br>\text{\hspace{1em}<br><br>}<br><br>\mathrm{temperature}<br><br>\text{\hspace{1em}<br><br>}<br><br>\mathrm{line}.$

22. The process according to claim 21 wherein a change in the temperature trend for the roll neck antifriction bearing over a plurality of temperature detection periods is used to determine a service requirement for the roll neck antifriction bearing.

23. A millstand for rolling metal shapes, said millstand comprising:

a housing having a window lined with side faces;

a chock located within the window and having side faces presented toward the side faces on the housing;

a roll supported on the housing and having a body and a roll neck at the end of the body, with the roll neck extending into the chock;

an antifriction bearing located between the roll neck and the chock for enabling the roll to rotate relative to the chock and the housing, the antifriction bearing including an outer race fitted into the chock, an inner race fitted around the roll neck, and rolling elements located between the inner and outer races;

sensors carried by the chock for sensing an operating condition of the antifriction bearing;

a chock transceiver carried by the chock capable of producing radio frequency signals that reflect conditions detected by the sensors, and also capable of receiving radio frequency signals;

a millstand transceiver positioned adjacent to the chock and being capable of transmitting radio signals to the chock transceiver and receiving radio frequency signals produced by the chock transceiver; and

a pass through enclosure positioned between, and in general alignment with, the chock transceiver and the millstand transceiver, the pass through enclosure being capable of transferring or relaying the radio frequency signals transmitted between the chock transceiver and the millstand transceiver.

24. A millstand according to claim 23 and further comprising inductively transferring electrical energy from the millstand transceiver to the chock transceiver and using the electrical energy so transferred to produce the radio frequency signal, and wherein the pass through enclosure is capable of transferring or relaying the electrical energy from the millstand transceiver to the chock transceiver.

25. A millstand according to claim 23 wherein the chock transceiver is electronically identified by a unique serial number.

26. A millstand according to claim 25 wherein the unique serial number is used to compile historical operating and maintenance data for the chock electronically identified by the unique serial number.

27. A millstand according to claim 23 wherein at least one of the sensors detects the temperature of the antifriction bearing.

28. A millstand according to claim 27 wherein said one sensor detects the temperature of the outer race of the antifriction bearing.

29. A millstand according to claim 23 wherein the millstand transceiver is carried by the housing.

30. A millstand according to claim 29 wherein the chock contains a recess which opens out of one of its side faces, and the chock transceiver is in the recess;

and wherein the housing contains a recess in one of the side faces that line its window, with the recess in the housing opening toward the recess in the chock; and

wherein the chock transceiver is in the recess in the housing.

31. A millstand according to claim 29 wherein the chock transceiver, the pass through enclosure, and the millstand transceiver are inductively coupled to transmit electrical energy from the millstand transceiver to the chock transceiver to operate the chock transceiver.

32. The millstand according to claim 23 wherein the millstand includes a monitoring network which instructs the primary transceiver to generate a control signal to control an auxiliary component used to perform a maintenance function related to the operation of the millstand.

33. A process of monitoring and controlling the operation of a roll neck antifriction bearing that is fitted to a chock located in a housing of a millstand, said process comprising:

a. at the chock, sensing an operating characteristic of the roll neck antifriction bearing;

b. from within the chock, producing a first radio frequency signal that reflects the operating characteristic of the roll neck antifriction bearing;

c. receiving the first radio frequency signal at a location remote from chock; and

d. using the first radio frequency signal so received to assess a need for a maintenance task required for the roll neck antifriction bearing, wherein the need for a maintenance task required for the rolling mill bearing is determined by a process of roll neck antifriction bearing temperature monitoring, wherein the process for bearing temperature monitoring is accomplished by comparing a predicted end temperature, the predicted end temperature calculated by combining a temperature rise over ambient and a temperature gradient for the roll neck antifriction bearing to a current temperature of the rolling mill bearing using the following equations;

$T=T<br><br>\text{\hspace{1em}<br><br>}<br><br>a+T<br><br>\text{\hspace{1em}<br><br>}<br><br>r<br><br>\text{\hspace{1em}<br><br>}<br><br>i<br><br>\text{\hspace{1em}<br><br>}<br><br>s<br><br>\text{\hspace{1em}<br><br>}<br><br>e<br><br>\left(1-e^{-\frac{1}{\mathrm{\tau <br><br>}}}\right)$$\frac{<br><br>T}{<br><br>t}=\frac{T<br><br>\text{\hspace{1em}<br><br>}<br><br>r<br><br>\text{\hspace{1em}<br><br>}<br><br>i<br><br>\text{\hspace{1em}<br><br>}<br><br>s<br><br>\text{\hspace{1em}<br><br>}<br><br>e}{\mathrm{\tau <br><br>}}<br><br>e^{-\frac{1}{\mathrm{\tau <br><br>}}}$$T<br><br>\text{\hspace{1em}<br><br>}<br><br>e=T+\frac{<br><br>T}{<br><br>t}<br><br>\mathrm{\tau <br><br>}$

Where;

T=current temperature indicated by the temperature sensors

Ta=ambient temperature

Trise=the ending temperature Te minus the ambient temperature Ta

τ

=the time constant of the system specific to the specific heat and the lumped heat transfer coefficient $\frac{<br><br>T}{<br><br>t}=\mathrm{slope}<br><br>\text{\hspace{1em}<br><br>}<br><br>\mathrm{of}<br><br>\text{\hspace{1em}<br><br>}<br><br>\mathrm{the}<br><br>\text{\hspace{1em}<br><br>}<br><br>\mathrm{current}<br><br>\text{\hspace{1em}<br><br>}<br><br>\mathrm{temperature}<br><br>\text{\hspace{1em}<br><br>}<br><br>\mathrm{line}.$

34. The process according to claim 33 wherein a change in the temperature trend for the roll neck antifriction bearing over a plurality of temperature detection periods is used to determine a service requirement for the roll neck antifriction bearing.

35. The process according to claim 34 further comprising a second radio frequency signal used to control an auxiliary component to perform a control function related to the need for maintenance for the roll neck antifriction bearing.