Engine, Pump and Compressor Power Take-Off Clutches
32Pages

ALTRA INDUSTRIAL MOTION Engine, Pump and Compressor Power Take-Off Clutches ALTRA INDUSTRIAL MOTION A. Warner Electric Altra Industrial Motion

Engine, Pump and Compressor Clutches Principles of Operation An electric clutch operates on the basic principle of magnetic attraction. Closing a switch sends electric current to an electromagnet or “field”, producing a strong magnetic attraction which concentrates around the magnetic poles of the field. The magnetic attraction jumps the small air gap between the field and the rotor, effectively making the rotor a spinning magnet. This “magnet” attracts the armature, grips it tightly and causes it to turn with the rotor. Opening the switch turns off the magnet, disengaging the clutch. Magnetic...

Engine, Pump and Compressor Clutches- Selection Armature Assembly Rotor Pulley Assembly Air Gap Field Assembly Electric clutches provide for remote control of the feed and chopping mechanisms on straw choppers, insulation blowers, and salt spreaders. An engine mounted pump on this highway maintenance truck supplies hydraulic pressure for the sand spreader. Mounting an electric clutch on the pump will increase equipment life, improve machine efficiency, and allow the operator to engage and disengage the hydraulic system on demand.

The Right Clutch For Your Application Several specifications must be determined to select the right Warner Electric clutch for a particular application. Compile these from the selection factors discussed on the next four pages and compare them to the clutch specifications found on pages 7 through 24 to find the correct clutch for your application. Clutch Dimensions Overall or envelope dimensions of a clutch being considered for an application must be noted to ensure that the clutch will fit into the space allotted. Choosing the Correct Size Clutch Torque and horsepower calculations...

Engine, Pump and Compressor Clutches- Selection Example Fluid Power Formula A 10 horsepower pump driven by an electric motor operates at 1500 RPM. Using 3 as the value of the “K” factor, determine the required clutch torque capacity. 10 HP at 1500 RPM = 35 lb.ft. torque “K” factor 3 x 40 lb.ft. = 105 lb.ft. torque. GPM = Fluid flow in gallons per minute PSI = Pressure in pounds per square inch Pump efficiency = normally 85% T = Torque (Ib. ft.) HP = Horsepower RPM = Speed of Clutch (revolutions per minute) CIR = Cubic inch per revolution (hydralic pump) PSI = Pounds per square inch “K” =...

Shafts Warner Electric standard clutches are available to adapt to three different shaft configurations: Straight bore - for through shaft or end of shaft mounting. Tapered bore (8:1) - shaft tapers 11/2 inches per foot, for end of shaft mounting. Tapered bore (4:1) - shaft tapers three inches per foot, for end of shaft mounting. Types of Drives Warner Electric offers clutches which are compatible with the three basic types of drives. shaft with a universal joint or other flexible coupling is attached to the engine crankshaft or transmission PTO on one end and the pump or compressor on the...

Electrical Electrical Ratings All current and resistance ratings are taken at ambient temperatures of 70°F (20°C). Voltage Requirements Warner Electric clutches are normally furnished with 12 VDC coils. Clutches can be designed to accommodate other voltages. Current Draw Current draw for each clutch model is listed in the product specifications section of this section. Resistance/Heat Dissipation Electrical resistance increases with coil temperature. Since the increase in electrical resistance reduces coil current, the torque transmitted by the clutch will be reduced. In applications where...

Notes: All dimensions are inches. All units 12V unless otherwise indicated Clutch Type Groove Size Gage Line

Tapered Bore Clutches (Flange or Yoke Direct Drive, Double Row Bearing) Notes: All dimensions are inches. All units 12V unless otherwise indicated Drive shaft alignment must be within 3° maximum. (Clutch centerline must be within 3° of power source centerline) Clutch Field Groove Size Gage Draw Resistance Torque Model A Type Type B X Y C D E Line Amps Ohms1 Ib ft. Rotation No.

Engine, Pump and Compressor Clutches- Dimensions Tapered Bore Clutches (Flange Mount, Single Row Bearing)

Notes: All dimensions are inches. All units 12V unless otherwise indicated Clutch Field Groove Size Gage A Type Type B X Y C D E Line Draw Resistance Torque Amps Ohms1 Ib ft Rotation Model No. 1Cold current draw 224V 3Special terminal

Same Field as page 12 Notes: All dimensions are inches. All units 12V unless otherwise indicated Clutch Gage Draw Resistance Torque A Type B X Y C D E Line Amps Ohms1 Ib ft Rotation Model No.l

Fields Notes: All dimensions are inches. All units 12V unless otherwise indicated Clutch - Gage Draw Resistance Torque A Type B X Y C D E Line Amps Ohms1 Ib ft Rotation Model No.

Notes: All dimensions are inches. All units 12V unless otherwise indicated Number of Grooves Groove Size Current1 Static Gage Draw Resistance Torque Line Amps Ohms1 Ib ft Rotation Model No.l 1Cold current draw 224V 3Special terminal

Field All dimensions are inches. All units 12V unless otherwise indicated Clutch Type Number of Grooves Groove Size Gage Line Static Torque Ib ft Rotation Model No. 5.82 4 2.76 8 1.16 .14 .14 .14 40° .841 4.89 2.45 180 CW 1417-44 1Cold current draw 224V 4A/B groove

Clutches on this page are specially constructed to withstand more severe operating environments. All dimensions are inches. All units 12V unless otherwise indicated. Number of Grooves Groove Size Gage Line 1Cold current draw 28:1 Taper 4A/B groove 224V

Straight Bore Clutches (Bearing Mount) All dimensions are inches. All units 12V unless otherwise indicated Static Current1 Bore Clutch Armature T°rque Draw Resistance Size Type Type A B X C Ib ft Amps Ohms1 Rotation Keyway Model No. 1Cold current draw 290 Volts