GE Bently Nevada RK4

Features Manufactured by GE Bently Nevada A variety of balance weights are provided with weights as low as 0.1 gram ± 5 volt analog control input for remote control of the DC motor Digital tachometer with large LCD readout Reversible motor direction Adjustable slow roll speed capability Compact Proximitor assembly with easy-to-use connectors V-frame design for better control of housing dynamic stiffness properties Better alignment through improved machining The GE Bently Nevada RK4 rotor kit is a miniature, bench top rotating machine that simulates a number of machinery malfunctions including unbalance, rubs, fluid-induced instabilities, loose rotating parts, preloads, and others. Its unique geometry and its ability for users to isolate and control individual machine characteristics make it useful as both a teaching tool and as a laboratory tool for theoretical research. In addition to machinery behavior, the rotor kit can be used to teach the fundamentals of proximity probe placement, gapping, and troubleshooting. It can also help technicians learn how to read and interpret proximity probe signals using an oscilloscope. The GE Bently Nevada RK4 rotor kit has a V-frame design that has been developed to provide better control of the housing dynamic stiffness properties. The mechanical tolerances have also been tightened, resulting in more accurate machine behavior modeling. The RK4 rotor kit motor can closely hold the desired speed with changes in loading conditions. This has been accomplished by incorporating a direct current motor and high performance control circuitry. The motor can run in either a clockwise or counter-clockwise direction and has adjustable slow roll speed capability. It can be controlled remotely by using a ± 5 volt control input, such as a signal generator or dc power supply, to drive the motor speed control device. Rotor speed is displayed on a digital tachometer with a large LCD readout. The GE Bently Nevada RK4 rotor kit includes: A mechanical base ( including motor, coupling, rotor shaft, two balance wheels, two journal bearings and bearing blocks, six proximity probes, three probe mounts, a rub screw, and three safety covers) A Proximitor assembly that contains five Proximitor units A direct current motor speed control device The motor speed control device provides power for both the rotor kit and the Proximitor assembly. A measurement and diagnostic tool, such as an oscilloscope or other diagnostic instrument, should be ordered separately in order to observe the RK4 machine behavior. An optional Oil Whirl/ Whip kit is also available to help users observe and demonstrate fluid-induced instabilities. The Oil Whirl/ Whip kit includes: A high pressure oil pump assembly An oil whirl bearing assembly A rotor kit shaft with oil bearing journal A load frame An optional perturbator kit is also available. The Unbalance Perturbator Option applies a precise rotating force to the Rotor Kit shaft independent of the shaft rotative speed. Perturbation testing is a powerful experimental technique used to identify rotor system parameters. The Unbalance Perturbator Option is a 3-in-1 tool that allows the user to perform nonsynchronous, synchronous, and static perturbation experiments on the RK4 Rotor Kit, with or without the Oil Whirl Option. The Perturbator kit includes: A mechanical base ( including motor, coupling, drive assembly, drive belts, and two proximity probes for motor speed control and Keyphasor signal pickup) A perturbator disk assembly A motor speed control unit GE Bently Nevada RK4 Rotor Kit specifications: Basic Rotor Kit Power 95 to 125 Vac, single phase, or 190 to 250 Vac, single phase, 50 to 60 Hz at 3.0 A maximum Fuse Rating 250 V at 3 A slow-blow. Buffered Proximitor Assembly Outputs 200 mV/ mil Max Speed 10, 000 rpm, typical Max Ramp Rate ± 15, 000 rpm/ min. typical Oil Whirl/ Whip Kit ( Optional) Oil Pump Power 95 to 125 Vac, single phase 50 to 60 Hz at 1.5 A maximum; or 190 to 250, single phase, 50 to 60 Hz at 0.75 A maximum. User-selectable input voltage. Oil Pump Fuse Rating 95 to 125 Vac: 250 V 3.0 A slow-blow 190 to 250 Vac: 250 V 1.5 A slow-blow User-selectable fuse Perturbator Kit ( Optional) Power 95 to 125 Vac, single phase, or 190 to 250 Vac, single phase, 50 to 60 Hz at 3.0 A maximum Fuse Rating 250 V at 3 A slow-blow Max Speed 10, 000 rpm, typical Max Ramp Rate ± 15, 000 rpm/ min, typical
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