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  • Users: RM12
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  1. RM12

    GE Vertical Motor - Spherical Roller bearing with springs

    I have been trying to test run an induction vertical motor with spherical roller bearing on the NDE. This bearing is inside a cartridge under which there are springs. The entire assembly goes inside the bearing housing. The DE has a deep groove ball bearing (guide bearing). The axial play was...
  2. RM12

    H1 H2 H3 wires for space heaters (Induction motor)

    I have 4 space heaters in a motor rated for 240V 1000W each. The aux box has three wires H1 H2 and H3. Can anyone explain how the wiring would be for the heaters with the three wires. How are they connected to operate these heaters either using 120V or 240V?
  3. RM12

    Dynomometer

    Could someone please explain how to interpret the attached power absorption curve? As an example, if I am trying to run 1800 rpm motor rated for 700 HP. Would I be able to?
  4. RM12

    Backlash Calculation

    I have a gear train with 2 spur gears, 2 bevel gears. I wanted to know if someone could guide on how to calculate the backlash for these gears and what I need know and do to acheive this. The train has a one shaft with the bevel gear and spur gear inch apart on the shaft. The spur gear drives...
  5. RM12

    Backlash Gear system

    I am trying to understand where a backlash is measured in a gear system. I have a shaft with sun gear on it and it meshes with another shaft having a pinion gear. Sun gear shat has a coupling to on end which is being driven by a motor. (But this system is uncoupled) Pinion gear shaft has a...
  6. RM12

    Cycling Vibration on 1800 RPM Vertical Motor

    I am running a vertical motor 4160 V and 1800 RPM unloaded. I checked the mechanical integrity of all parts, bearings housings, stator and rotor. When I measure the vibrations, I get cycling vibration at 2 x the rotation between 0.07 to 0.22 inc/s. Can anyone help understand why this maybe?
  7. RM12

    ABB VFD

    I have an ABB ACS800-01 VFD that is operating a 25 hp 460 V AC motor. Recently I have been having breaker trips as soon as I switch the power supply on. I checked the circuit for any blown marks etc. and it seems fine. Ask for information if you have questions. Does anyone know why that is?
  8. RM12

    Size of Air Conditioner

    I have a large hollow carbon steel cylinder with 58-inch ID, 66 Inch OD and 144-inch length weighing 2342 lbs., inside a 144*144*144 cube. On one face of the cube is attached an AC. The Inside surface of the cylinder is 350 F. I need to calculate the size of AC to use to bring the temperature...
  9. RM12

    Balancing a Vertical Pump Motor on a rubber base

    I have been working on trim balancing a motor (Vertical pump motor) that was reconditioned. I was wondering if anyone has approached balancing vertical motors placed on a rubber pads (1/2 inch thick) to simulate a pump head attached in the field. Of course, the motor is clamped down on an...
  10. RM12

    Balancing Vertical Pump Motors on rubber pads

    I have been working on trim balancing a motor (Vertical pump motor) that was reconditioned. I was wondering if anyone has approached balancing vertical motors placed on a rubber pads (1/2 inch thick) to simulate a pump head attached in the field. Of course, the motor is clamped down on an...

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