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Shaft Horsepower & Torque Monitoring

SITUATION

  • Gathering accurate data on shaft RPM & Torque has been problematic.
  • Accurate RPM & Torque readings are required in calculating horse-power and in determining system efficiencies.
  • The shaft sensors need to be rugged enough to work in harsh environments and continually provide data to the collection system
  • A local display is needed to monitor and verify readings.

[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][vc_column width=”1/3″][vc_single_image image=”1402″ img_size=”full” alignment=”center” css=”.vc_custom_1502736817241{margin-top: 20px !important;margin-right: 5px !important;margin-bottom: 20px !important;margin-left: 5px !important;}”][/vc_column][/vc_row][vc_row][vc_column][vc_column_text]

CHALLENGE— ACQUIRING THE MEASUREMENTS

The need for torque measurements has led to several methods of acquiring data from moving objects.
Two common ways to obtain torque measurements are by strain-gauging the shaft or by using in-line
torque cells. Torque sensors or transducers convert torque into an electrical signal. Both these approaches
have two technical obstacles:

  1. Getting power to the gauges over the stationary/rotating gap
  2. Getting the signal output.

Due to the challenging and extreme conditions of a vessel’s engine room environment, the rotor/stator
systems are difficult to install, calibrate and maintain. Add to the fact their complex nature and the use of
poor and/or lack of a proper calibration procedure, output data typically is unreliable.

SOLUTION

The “ShaftMaster” Horsepower and Torque monitoring system is manufactured by Hillhouse Industrial & Marine. Two Magnetic tapes, one on each side of a line shaft bearing are epoxied in place to the shaft. Two precision mounted Sensors read the magnetic pulses on each side of the line shaft bearing. A local display is mounted in close proximity to the shaft sensors; this local display used for calibration will also display RPM, Torque, Horsepower and Engine hours. After initial calibration the system requires no maintenance calibration.[/vc_column_text][/vc_column][/vc_row][vc_row][vc_column width=”1/2″][vc_column_text]

SOLUTION CONTINUED

The following data can be extracted from the “ShaftMaster” system.

  • Instantaneous RPM
  • Average RPM
  • Horsepower
  • Average Horsepower
  • Horsepower Hours
  • Torque
  • Kilowatt Hours
  • Shaft Direction
  • Shaft Stopped Indication
  • Total Revolutions Counter
  • Current Outputs available to interface with other devices
  • Digital Outputs available to interface with other devices.

Provide historic data for comparison and analysis on a monthly, daily, or even hourly basis.[/vc_column_text][/vc_column][vc_column width=”1/2″][vc_single_image image=”1384″ img_size=”full” alignment=”center” css=”.vc_custom_1502735229296{margin-top: 20px !important;margin-bottom: 20px !important;}”][/vc_column][/vc_row][vc_row][vc_column width=”1/2″][vc_single_image image=”1388″ img_size=”full” alignment=”center” css=”.vc_custom_1502735356311{margin-top: 20px !important;margin-bottom: 20px !important;}”][/vc_column][vc_column width=”1/2″][vc_single_image image=”1389″ img_size=”full” alignment=”center” css=”.vc_custom_1502735375075{margin-top: 20px !important;margin-bottom: 20px !important;}”][/vc_column][/vc_row][vc_row][vc_column][vc_column_text css=”.vc_custom_1502735688957{margin-top: 25px !important;margin-right: 0px !important;margin-bottom: 0px !important;margin-left: 0px !important;padding-top: 0px !important;padding-right: 5px !important;padding-bottom: 0px !important;padding-left: 5px !important;}”]Typically mounted in the engine room control console, the user can cycle thru various screens to view shaft data.[/vc_column_text][/vc_column][/vc_row][vc_row][vc_column][vc_single_image image=”1391″ img_size=”full” css=”.vc_custom_1502736478081{margin-bottom: 20px !important;}”][/vc_column][/vc_row][vc_row][vc_column][vc_single_image image=”1397″ img_size=”full” css=”.vc_custom_1502736487019{margin-bottom: 20px !important;}”][/vc_column][/vc_row][vc_row][vc_column][vc_column_text]

Typical Performance Periods

Estimated installation and commissioning of a single shaft system, 6 to 10 working days.
TMS has installed and proven this system on the following Vessels:

S.S. Algol – Port and Stbd. Propulsion Shafts, 60,000 Horsepower per shaft.

S.S. Capella – Port and Stbd. Propulsion Shafts, 60,000 Horsepower per shaft.

S.S. Regulus – Port and Stbd. Propulsion Shafts, 60,000 Horsepower per shaft.

U.S.N.S. Mercy – Single Propulsion Shaft.

Pacific Tracker – Single Propulsion Shaft.

Pacific Collector – Single Propulsion Shaft having C.P.P. (Controlled Pitch Propeller).[/vc_column_text][/vc_column][/vc_row][vc_row][vc_column][vc_column_text]Download PDF[/vc_column_text][/vc_column][/vc_row]