Product Description

The unit consists of a base upon which the bearing holders and driving motor are coupled. Different bearing can be fitted in a bearing holders to provided different and conditions for test shafts, viz. both end fixed and one end free, one end fixed. A variac provided speed control of driving motor. The unit demonstrates the phenomenon of whirling of shafts with single rotor. As the test is destructive, after the test shaft can not be used, hence the unit only demonstrates the principle. However, results obtained are closer to theory, as compared to those with bare shafts. Also, it can be demonstrated that, after passing whirling speed, shaft again starts running true.

whirling – one step ahead –

  1. No necessity of applying pre-tension to shaft. Thus giving a stress -free shaft, where equations of deflection can be applied without doubt.
  2. Because of single rotor system, good results comparable with theory.
  3. Demonstration of true running of shafts after passing the critical (whirling) speed.

SPECIFICATIONS :

    1. Test shafts – 4.75 mm , 6.35 mm. and 7.9 mm. – 2 each.
    2. Bearing to provided end conditions. a) Both ends fixed. b) One end fixed and one end free.
    3. Drive Motor 1/8 HP, 1500 rpm with speed control arrangement.
    4. The whole unit is mounted on a sturdy base.

Rotor for each shaft, of suitable size.

A technical manual accompanies the unit.

SERVICES REQUIRED :

  1. Floor space area of 2m. x 1m. at working height.
  2. 230 V, 15 A, AC electric supply with earthing connection.
  3. Tachometer to measure the speed. ( provided at extra cost )