Method and system for monitoring a piston rod
First Claim
1. A method for monitoring a condition of a piston rod of a reciprocating compressor, said piston rod having a length defined between a piston end and a crosshead end, said method comprising:
- positioning a first probe with respect to the piston rod along a x-axis and positioning a second probe with respect to the piston rod along a y-axis coplanar with and substantially perpendicular to the x-axis;
detecting a current ringing vibration amplitude greater than ten times a maximum of a one-hour average and a noise floor at a ringing frequency; and
diagnosing a bent rod condition.
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Accused Products
Abstract
A method for monitoring a condition of a piston rod of a reciprocating compressor is provided. The piston rod having a length defined between a piston end and a crosshead end. The method includes positioning a first probe with respect to the piston rod along a x-axis and positioning a second probe with respect to the piston rod along a y-axis coplanar with and substantially perpendicular to the x-axis. A current ringing vibration amplitude greater than ten times a maximum of a one-hour average and a noise floor at a ringing frequency is detected, and a bent rod condition is diagnosed.
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Citations
20 Claims
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1. A method for monitoring a condition of a piston rod of a reciprocating compressor, said piston rod having a length defined between a piston end and a crosshead end, said method comprising:
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positioning a first probe with respect to the piston rod along a x-axis and positioning a second probe with respect to the piston rod along a y-axis coplanar with and substantially perpendicular to the x-axis;
detecting a current ringing vibration amplitude greater than ten times a maximum of a one-hour average and a noise floor at a ringing frequency; and
diagnosing a bent rod condition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for monitoring a condition of a piston rod of a reciprocating compressor, said piston rod having a length defined between a piston end and a crosshead end, said method comprising:
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positioning a first probe with respect to the piston rod along a x-axis and positioning a second probe with respect to the piston rod along a y-axis coplanar with and substantially perpendicular to the x-axis;
checking a compressor operation mode;
generating an indication if the machine speed has been within design limitations for at least two minutes;
determine a ringing vibration state;
analyzing each of the first probe and the second probe to determine whether at least one of first probe and the second probe detects a current ringing vibration amplitude greater than ten times a maximum one-hour average and a noise floor at a ringing frequency;
comparing a 6-second buffer gap average against a one-hour buffer average for each probe independently; and
generating an indication that a possible bent rod condition exists if a difference between the 6-second buffer average and the one-hour buffer average for at least one probe is greater than a defined value for 6 consequent rule processing cycles. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A computer program embodied on a computer readable medium for monitoring a condition of a piston rod positioned with respect to at least one of a first chamber and a second chamber of a reciprocating compressor, said computer program comprising a code segment configured to:
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detect a current ringing vibration amplitude greater than ten times a maximum of a one-hour average and a noise floor at a ringing frequency utilizing at least one of a first probe positioned with respect to the piston rod along a x-axis and a second probe positioned with respect to the piston rod along a y-axis coplanar with and substantially perpendicular to the x-axis; and
diagnosing a bent rod condition. - View Dependent Claims (19, 20)
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Specification