Whirling of Shaft | ProDynami 1260
Whirling of Shaft ProDynami 1260 demonstrates the concept of whirling in shafts and its effects in heavy rotating machinery. This Whirling of Shaft apparatus is a bench top, self contained unit with motor-driven shafts, digital speed display, and speed control from 0 to 6000RPM via AC drive. Steel rotor shafts are available in 3mm, 6mm and 7mm diameters, with lengths of 990mm and 840mm, alongside an 80mm steel rotor disc weighing 400g or 300g. The 1kW motor unit weighs approximately 65kg and supports Laval rotor assembly with optional vibration sensors.
The Whirling of Shaft ProDynami 1260 demonstrates the concept of whirling in shafts and visualizes its effects in heavy rotating machinery. This Whirling of Shaft apparatus shows how transverse vibration is produced when a shaft rotates, and how centrifugal forces cause vibration when the shaft is out of balance.
Product Overview
The Whirling of Shaft ProDynami 1260 shows that if the rotation of the shaft equals the natural oscillation of the shaft, vibrations are multiplied. In heavy machinery this phenomenon is very dangerous and must be controlled. The apparatus consists of a number of shafts of different lengths and diameters, a center support for the shaft, and an end support. The shaft is coupled with a motor, and motor speed can be varied to inspect vibrations at various speeds. The modes of oscillation and resonances of rotors with continuous mass distribution can be clearly demonstrated using this unit. Thin, elastic rotor shafts made of high-strength steel make the oscillatory phenomena easy to understand. A range of shaft diameters and the free choice of bearing arrangement allow a wide variety of experiments. Adapters in the bearings compensate for different diameters. Catch bearings limit the amplitude of the oscillation. The freedom of movement of the rotor is assured by an elastic coupling. A Laval rotor with discrete mass distribution can be assembled using a mass disc. As a supplement to this unit, a set of vibration sensors is available. These enable the path of the rotor to be displayed on an oscilloscope. This Whirling of Shaft apparatus is a self-contained, bench top unit for demonstrating critical rotational speeds.
Whirling of Shaft ProDynami 1260 — Technical Specifications
| Parameter | Value |
|---|---|
| Unit Type | Bench top, self contained apparatus for demonstration of critical rotational speeds on simply loaded and continuous shafts |
| Drive | Motor driven, speed controlled through self aligning bearings |
| Speed Display | Digital display of speed |
| Shaft Sizes | Set of different shaft sizes in length and diameter |
| Rotor Disc Material | Steel |
| Safety | Micro switch power cut off |
| Rotor Shaft Material | Steel |
| Rotor Shaft Diameter | 3mm, 6mm, 7mm |
| Rotor Shaft Length | 990mm, 840mm |
| Rotor Disc Material | Steel |
| Rotor Disc Diameter | 80mm |
| Rotor Disc Weight | 400g, 300g |
| Motor Power | 1kW |
| Speed Range | 0…6000RPM |
| Speed Control | Electronically controlled by AC Drive |
| Unit Weight | Approx. 65kg |
Technical Data
Rotor Shafts
| Parameter | Value |
|---|---|
| Material | Steel |
| Diameter | 3mm, 6mm, 7mm |
| Length | 990mm, 840mm |
Rotor Disc
| Parameter | Value |
|---|---|
| Material | Steel |
| Diameter | 80mm |
| Weight | 400g, 300g |
Motor
| Parameter | Value |
|---|---|
| Power | 1kW |
| Speed | 0…6000RPM |
| Speed Control | Electronically controlled by AC Drive |
Unit
| Parameter | Value |
|---|---|
| Weight | Approx. 65kg |
Key Features
- Apparatus Type: Whirling of Shaft unit for demonstrating shaft whirling phenomena
- Design: Bench top, self contained apparatus
- Application Scope: Critical rotational speeds on simply loaded and continuous shafts
- Drive System: Motor driven, speed controlled through self aligning bearings
- Speed Display: Digital display
- Shaft Options: Set of different shaft sizes in length and diameter
- Rotor Disc: Made of steel
- Safety Cut Off: Micro switch power cut off
- Bearing Adapters: Compensate for different shaft diameters
- Catch Bearings: Limit amplitude of oscillation
- Rotor Freedom: Assured by elastic coupling
- Laval Rotor Assembly: Possible using mass disc
- Vibration Sensors: Available as supplement, display rotor path on oscilloscope
- Rotor Shaft Diameters: 3mm, 6mm, 7mm
- Rotor Shaft Lengths: 990mm, 840mm
- Rotor Disc Diameter: 80mm
- Rotor Disc Weight: 400g, 300g
- Motor Power: 1kW
- Speed Range: 0…6000RPM
- Unit Weight: Approx. 65kg
Experiments
- Speed-dependent experiments on rotation
- Modes of oscillation of a rotor shaft with individual masses (Laval rotor): critical speed
- Modes of oscillation of a continuous rotor shaft: for varying bearing spacing
- Modes of oscillation of a continuous rotor shaft: for varying shaft diameter
- Modes of oscillation of a continuous rotor shaft: self-centering
Construction and Design
The Whirling of Shaft ProDynami 1260 is a bench top, self contained apparatus for the demonstration of critical rotational speeds on simply loaded and continuous shafts. Shafts are motor driven and speed controlled through self aligning bearings. Speed is shown on a digital display. A set of different shaft sizes in length and diameter is provided. The rotor disc is made of steel. A micro switch provides power cut off. Rotor shafts are made of steel with diameters of 3mm, 6mm and 7mm, and lengths of 990mm and 840mm. The rotor disc has a diameter of 80mm and weighs 400g or 300g. The motor power is 1kW, with a speed range of 0…6000RPM, electronically controlled by an AC drive. The unit weighs approximately 65kg. Adapters in the bearings compensate for different diameters. Catch bearings limit the amplitude of oscillation. The freedom of movement of the rotor is assured by an elastic coupling. This construction allows the Whirling of Shaft apparatus to clearly demonstrate modes of oscillation and resonance in rotors with continuous mass distribution.
Scope of Delivery
- 1 complete experimental unit
- 6 rotor shafts
- 1 rotor disc
- 1 instruction manual
Optional Accessories
- Set of vibration sensors (enable the path of the rotor to be displayed on an oscilloscope)
Q: What is the Whirling of Shaft ProDynami 1260 used for?
A: It demonstrates the concept of whirling in shafts and visualizes its effects in heavy rotating machinery, including speed-dependent oscillation and critical speed behavior.
Q: What rotor shaft sizes are available?
A: Diameters of 3mm, 6mm and 7mm, with lengths of 990mm and 840mm.
Q: What is the motor power and speed range?
A: Motor power is 1kW with a speed range of 0…6000RPM, electronically controlled by an AC Drive.
Q: How is safety ensured during operation?
A: A micro switch provides power cut off, and catch bearings limit the amplitude of oscillation.
Q: What does the scope of delivery include?
A: 1 complete experimental unit, 6 rotor shafts, 1 rotor disc, and 1 instruction manual.
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