ANVIL Series Foot Mount Torque-Meter

OVERVIEW OF MEASUREMENT SYSTEM

Type of Measurement: Fatigue Rated Measurement of Input / Output Torsionals

Typical Test: Engine & Powertrain Fatigue Testing Dynamometer

• Resolution accuracy: 0.01% ( 1 part in 10,000 )
• Capacities : 10,000 to 36,000 in.-lbs. Maximum RPM : 8,000
• Maximum RPM : 8,000
• Fatigue Life:100 Million Cycles
• Temperature Range: -25 ºF to +200 ºF
• Calibration Repeatability: 0.01 %
• Test Environment: Dyno Lab

 

Special Test Conditions:

• Possible Bending Moment / Side Load between rotating flange and stationary housing (One end of Torque-Meter Only)
• Possible High Magnetic & Electric Fields from Dyno Motors, Eddy Current Brakes or other Electro-Mechanical Hardware
• Possible High Extraneous Loads & Torsional Overload from Engine or Powertrain Component Failures

 

Torque-Meter Features:

• Short Length Unit with Flanges for Maximizing Torsional Stiffness.
• Shaft / Flange Interface Features a Tapered P3 Polygon ( 3 cam ground lobes on a 10:1 taper) , Engineered to Resist Fretting Corrosion from Oscillating & Heavy Shock Loading (Dynamically it bears a close Resemblance to a Solid Joint).
• One or Both Flanges are able to Bolt Directly to the Flexible Disc Packs of a Rexnord / Thomas Series 52 Coupling .
• Bearings on One Housing End are Engineered to take the Extraneous Loading from a Cardan Joint Driveshaft.
• Heat Treated Housing with an Integral Foot Mount for Mechanical Rigidity & Reduced Fretting Corrosion at Bearing Interface from Extraneous Loading.
• Optional Excitation Carrier Frequencies of 3kHz, 3.28kHz, 5kHz, 10kHz, 20kHz
• Thermocouple ports for Monitoring of Bearing Temperatures
• Accelerometer Mounting Surfaces for Monitoring Alignment, Balance & Resonance Vibrations

Torque-Meter Description:

     Torque-Meter is designed to be integrated into an Engine & Powertrain Fatigue Testing Dynamometer. Torque-Meter accurately measures input / output torsionals while being resistant to fatigue and having a survivability when engine or powertrain components fail. It's short length with flanges maximizes torsional stiffness.

One end of the torque-meter has a bearing arrangement Engineered for the extraneous bending moment from a Cardan Joint Driveshaft or the side loading from a pulley or other mechanical arrangement. One or both flanges can bolt directly to the flexible disc packs of a Rexnord / Thomas Series 52 Coupling. Shaft / flange interface features a tapered P3 Polygon ( 3 cam ground lobes on a 10:1 taper), Engineered to resist the fretting corrosion from oscillating & heavy shock loading (dynamically it bears a close resemblance to a solid joint ). Torque-meter has an integral foot mount for mechanical rigidity and is heat treated for reduced fretting corrosion at the load bearing surfaces.

Torque-Meter uses passive strain gage technology on a rotating shaft. Mechanical stress is converted to strain which is transduced into a voltage signal via strain gages in a full wheatstone bridge arrangement. Communication between stationary and rotating worlds is performed via a rotary transformer. The rotary transformer requires an AC Excitation Voltage and transmits back an Amplitude Modulated Signal Voltage (mV) @ the Excitation Frequency, which is a measurement of the applied Torque.

Torque-Meter Options:

• Transformer Operating Frequencies of 3kHz, 3.28kHz, 5kHz, 10kHz or 20kHz.
• Bearing Thermocouple Probe Ass'y; Type J , Type K or Type T
• Housing Accelerometers
• Warning Sensors for Monitoring Alignment, Mass-Unbalance & Resonance Vibrations
• High Output or High Overload / Torsional Tuning of Center Member

Torque-Meter Specifications:

• Overload Capability : 400 % Typical (note: Overload may be reduced by Flange Capability)
• Nominal Output @ Rated Capacity : 2 mV/V (Full Wheatstone Bridge Network of Strain Gages)
• Excitation Voltage : 5 to 20 VAC @ Proper Operating Frequency
• Excitation Loading Impedance : 100 Ohm
• Non-Repeatability : 0.01 % of rated output
• Max. Non-Linearity : 0.05 % of rated output
• Max. Hysteresis : 0.05 % of rated output
• Compensated Temperature Range : +70 to 200 ºF
• Useable Temperature Range : -25 to 200 ºF
• Temperature effect on Output : 0.001 % / ºF of rated output
• Temperature effect on Zero Balance : 0.001 % / ºF of rated output
• Min. Insulation Resistance : 5,000 Mega-Ohm
• Typical Zero Balance : 2 % of rated output