METHOD OF MONITORING A HEALTH STATUS OF A BEARING WITH A WARNING DEVICE IN A PERCENTAGE MODE

• US 20150048952A1
• Filed: 12/21/2012
• Published: 02/19/2015
• Est. Priority Date: 12/21/2011
• Status: Abandoned Application

• Current Assignee: ABet SKF
• Original Assignee: ABet SKF
• Inventors: Murphy, Jonathan David
• Application Number:
  US14/372,596
• Publication Number:
  US 20150048952A1
• Time in Patent Office: Days
• US Class Current: 340/682
• CPC Class Codes: G01M 1/22 and converting vibrations due to imbalance into electric variables
• CPC Class Codes: G01M 13/045 Acoustic or vibration analysis
• CPC Class Codes: G08B 21/182 Level alarms, e.g. alarms responsive to variables exceeding a threshold

Abstract

A rotational element monitoring process (700) utilizing a machine condition indicating sensor and monitoring device (100) adapted to a rotating machine (410). The process (700) monitors at least one operating characteristic of a rotating element of a rotating machine. The operating characteristics can include velocity (500), acceleration (500), temperature (600), etc. The process (700) establishes a baseline value (524, 624) for each operating characteristic. An alarm threshold (530, 630) is determined by either a predetermined percentage difference (540) or a predetermined quantified delta (640). The device establishes a measurement schedule (740) retaining the device in a sleep mode (740) and pulsing a condition investigation in accordance with a frequency. The frequency increases (742) when approaching or exceeding an alarm condition. The device (100) indicates an alarm condition by illuminating an alarm indicating light (220, 222, 224).

Claims

1. A method of monitoring a condition of at least one rotating component of a rotating machine, the method comprising steps of:

installing a machine condition indicating sensor and monitoring device (100) onto a rotating machine (410) (block 710), said device (100) comprising;

a sensor housing comprising a base subassembly (120) and an upper enclosure (110),

a printed circuit assembly (200) comprising components assembled to a printed circuit board (202) defining an operational circuit, said components include a microprocessor (210), a digital memory component (210), a portable power supply (212), at least one condition sensor (220, 222, 224), and an instruction set (embedded within 210), wherein said instruction set directs operation of said circuit by said microprocessor (210);

obtaining at least one data point of at least one operating characteristic of the respective rotating component to determine an initial baseline of each of the at lease one operating characteristic of said rotating machine (410) (block 722);

establishing a threshold, wherein the threshold is calculated as a percentage difference from the respective baseline;

storing said initial baseline (524, 624) within said memory component (210) (block 724);

monitoring each respective at least one operating characteristic of said rotating component during operation of said rotating machine (410) (block 730);

comparing a currently obtained operating condition data point of each said respective at least one operating characteristic of said respective rotating component against said calculated threshold (524, 624) to determine if the currently obtained condition is one of approaching an alarm condition and exceeding an alarm condition (decision block 732); and

based upon said output of said comparison between said currently obtained condition data point and said respective stored baseline data value, proceeding with one of;

in a condition where said percentage difference is less than said calculated threshold, said machine condition indicating sensor and monitoring device continues to monitor conditions of said respective rotating component, and

in a condition where said percentage difference is greater than said calculated threshold, said machine condition indicating sensor and monitoring device indicates an alarming condition.

2. A method of monitoring a condition of at least one rotating component of a rotating machine as recited in claim 1, the method further comprising a step of:

illuminating an illuminating element when said machine condition indicating sensor and monitoring device indicates an alarming condition (block 770).

3. A method of monitoring a condition of at least one rotating component of a rotating machine as recited in claim 1, said the method further comprising a step of:

upon initial identification of an alarm condition, repeating said step of obtaining said at least one operating condition parameter of said respective rotating component during operation of said rotating machine (410) to validate said alarm condition (block 762), and upon identification of successive data points having a value that exceeds said calculated threshold, establishing said alarm condition and subsequently activating an alarm indicator.

4. A method of monitoring a condition of at least one rotating component of a rotating machine as recited in claim 1, said the method further comprising a step of:

programming said microprocessor (210) using a wireless communication process (block 712).

5. A method of monitoring a condition of at least one rotating component of a rotating machine as recited in claim 4, wherein said wireless communication process is accomplished using a magnetic read key (150) and a respective magnetic read device (240) (block 712).

6. A method of monitoring a condition of at least one rotating component of a rotating machine as recited in claim 1, said the method further comprising a step of:

monitoring said at least one of said velocity, said acceleration, and said temperature of said respective rotating component during operation of said rotating machine (410) in accordance with a frequency of data inquiries, wherein said frequency comprises a sleep mode between each sequential data inquiry, wherein said sleep mode places said operational circuit into a dormant, low power consumption configuration.

7. A method of monitoring a condition of at least one rotating component of a rotating machine as recited in claim 6, said the method further comprising a step of:

increasing said frequency of data inquiries when said operational circuit one of approaches an alarm condition and exceeds said alarm condition.

8. A method of monitoring a condition of at least one rotating component of a rotating machine, the method comprising steps of:

installing a machine condition indicating sensor and monitoring device (100) onto a rotating machine (410) (block 710), said device (100) comprising;

a sensor housing comprising a base subassembly (120) and an upper enclosure (110),

a printed circuit assembly (200) comprising components assembled to a printed circuit board (202) defining an operational circuit, said components include a microprocessor (210), a digital memory component (210), a portable power supply (212), at least one condition sensor (220, 222, 224), and an instruction set (embedded within 210), wherein said instruction set directs operation of said circuit by said microprocessor (210);

obtaining at least one data point of at least one operating characteristic of the respective rotating component to determine an initial baseline of at least one of a velocity (524), acceleration (524), and a temperature (624) of a respective rotating component of said rotating machine (410) (block 722);

storing said initial baseline (524, 624) within said memory component (210) (block 724);

establishing a threshold, wherein the threshold is calculated as a percentage difference from the respective baseline;

monitoring said at least one of said velocity, said acceleration, and said temperature of said respective rotating component during operation of said rotating machine (410) (block 730);

comparing currently obtained condition data of said at least one of said velocity, said acceleration, and said temperature of said respective rotating component against said calculated threshold (530, 630) for each of said at least one of said velocity, said acceleration, and said temperature of said respective rotating component to determine if said currently obtained condition is one of approaching said alarm condition and exceeding said alarm condition (decision block 732); and

based upon said output of said comparison between said currently obtained condition data and said respective stored baseline data, proceeding with one of;

in a condition where said percentage difference is less than said calculated threshold, said machine condition indicating sensor and monitoring device continues to monitor conditions of said respective rotating component, and

in a condition where said percentage difference is greater than said calculated threshold, said machine condition indicating sensor and monitoring device indicates an alarming condition.

9. A method of monitoring a condition of at least one rotating component of a rotating machine as recited in claim 8, the method further comprising a step of:

illuminating an illuminating element when said machine condition indicating sensor and monitoring device indicates an alarming condition (block 770).

10. A method of monitoring a condition of at least one rotating component of a rotating machine as recited in claim 8, said the method further comprising a step of:

upon initial identification of an alarm condition, repeating said step of obtaining said at least one of said velocity, said acceleration, and said temperature of said respective rotating component during operation of said rotating machine (410) to validate said alarm condition (block 762), and upon identification of successive data points having a value that exceeds said calculated threshold, establishing said alarm condition and subsequently activating an alarm indicator.

11. A method of monitoring a condition of at least one rotating component of a rotating machine as recited in claim 8, said the method further comprising a step of:

programming said microprocessor (210) using a wireless communication process (block 712).

12. A method of monitoring a condition of at least one rotating component of a rotating machine as recited in claim 11, wherein said wireless communication process is accomplished using a magnetic read key (150) and a respective magnetic read device (240) (block 712).

13. A method of monitoring a condition of at least one rotating component of a rotating machine as recited in claim 8, wherein said at least one condition sensor (220, 222, 224) includes at least one temperature sensor (220, 222), said the method further comprising a step of:

monitoring a temperature of said rotating machine (410) by thermally coupling said base subassembly 120 to said rotating machine (410); and

thermally coupling said base subassembly 120 and at least one temperature sensor (220, 222) to one another.

14. A method of monitoring a condition of at least one rotating component of a rotating machine as recited in claim 8, said the method further comprising a step of:

monitoring said at least one of said velocity, said acceleration, and said temperature of said respective rotating component during operation of said rotating machine (410) in accordance with a frequency of data inquiries, wherein said frequency comprises a sleep mode between each sequential data inquiry, wherein said sleep mode places said operational circuit into a dormant, low power consumption configuration.

15. A method of monitoring a condition of at least one rotating component of a rotating machine as recited in claim 14, said the method further comprising a step of:

increasing said frequency of data inquiries when said operational circuit one of approaches an alarm condition and exceeds said alarm condition.

16. A method of monitoring a condition of at least one rotating component of a rotating machine, the method comprising steps of:

installing a machine condition indicating sensor and monitoring device (100) onto a rotating machine (410) (block 710), said device (100) comprising;

a sensor housing comprising a base subassembly (120) and an upper enclosure (110),

a printed circuit assembly (200) comprising components assembled to a printed circuit board (202) defining an operational circuit, said components include a microprocessor (210), a digital memory component (210), a portable power supply (212), at least one accelerometer (224), and an instruction set (embedded within 210), wherein said instruction set directs operation of said circuit by said microprocessor (210);

obtaining at least one data point of at least one of a velocity (524) and acceleration (524) to determine an initial baseline of at least one of a velocity (524) and an acceleration (524) of a respective rotating component of said rotating machine (410) (block 722);

storing said initial baseline (524, 624) within said memory component (210) (block 724);

establishing a threshold, wherein the threshold is calculated as a percentage difference from the respective baseline;

monitoring said at least one of said velocity, said acceleration, and said temperature of said respective rotating component during operation of said rotating machine (410) (block 730);

comparing currently obtained condition data of said at least one of said velocity and said acceleration of said respective rotating component against said calculated threshold (530) for each of said at least one of said velocity and said acceleration of said respective rotating component to determine if the currently obtained condition is one of approaching an alarm condition and exceeding an alarm condition (decision block 732); and

based upon said output of said comparison between said currently obtained condition data and said respective stored baseline data, proceeding with one of;

in a condition where said quantified difference is less than v, said machine condition indicating sensor and monitoring device continues to monitor conditions of said respective rotating component, and

in a condition where said quantified difference is greater than the calculated threshold, said machine condition indicating sensor and monitoring device indicates an alarming condition.

17. A method of monitoring a condition of at least one rotating component of a rotating machine as recited in claim 16, the method further comprising a step of:

illuminating an illuminating element when said machine condition indicating sensor and monitoring device indicates an alarming condition (block 770).

18. A method of monitoring a condition of at least one rotating component of a rotating machine as recited in claim 16, said the method further comprising a step of:

upon initial identification of an alarm condition, repeating said step of obtaining said at least one of said velocity and said acceleration of said respective rotating component during operation of said rotating machine (410) to validate said alarm condition (block 762), and upon identification of successive data points having a value that exceeds said calculated threshold, establishing said alarm condition and subsequently activating an alarm indicator.

19. A method of monitoring a condition of at least one rotating component of a rotating machine as recited in claim 16, said the method further comprising a step of:

programming said microprocessor (210) using a wireless communication process (block 712).

20. A method of monitoring a condition of at least one rotating component of a rotating machine as recited in claim 19, wherein said wireless communication process is accomplished using a magnetic read key (150) and a respective magnetic read device (240) (block 712).

21. A method of monitoring a condition of at least one rotating component of a rotating machine as recited in claim 16, the method further comprising a step of:

determining a velocity of said rotating element by measuring said acceleration of said rotating member.

22. A method of monitoring a condition of at least one rotating component of a rotating machine as recited in claim 16, said the method further comprising a step of:

monitoring said at least one of said velocity, said acceleration, and said temperature of said respective rotating component during operation of said rotating machine (410) in accordance with a frequency of data inquiries, wherein said frequency comprises a sleep mode between each sequential data inquiry, wherein said sleep mode places said operational circuit into a dormant, low power consumption configuration.

23. A method of monitoring a condition of at least one rotating component of a rotating machine as recited in claim 22, said the method further comprising a step of:

increasing said frequency of data inquiries when said operational circuit one of approaches an alarm condition and exceeds said alarm condition.