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Products  |  Engineering Mechanics and Machine Elements  |  Fundamentals of Engineering Design  |  GL 212
GL 212 Dynamic Behaviour of Multi-Stage Planetary Gears Show data sheet (pdf file) Print page
GL 212 - A product from the GUNT 2E range
Technical Description

  The planetary gear is a special type of gear drive, in which the multiple planet gears revolve around a centrally arranged sun gear. The planet gears are mounted on a planet carrier and engage positively in an internally toothed ring gear. Torque and power are distributed among several planet gears. Sun gear, planet carrier and ring gear may either be driving, driven or fixed. Planetary gears are used in automotive construction and shipbuilding, as well as for stationary use in turbines and general mechanical engineering.
  The GL 212 unit allows the investigation of the dynamic behaviour of a two-stage planetary gear. The trainer consists of two planet gear sets, each with three planet gears. The ring gear of the first stage is coupled to the planet carrier of the second stage. By fixing individual gears, it is possible to configure a total of four different transmission ratios. The gear is accelerated via a cable drum and a variable set of weights. The set of weights is raised via a crank. A ratchet prevents the weight from accidentally escaping. A clamping roller freewheel enables free further rotation after the weight has been released. The weight is caught by a shock absorber. A transparent protective cover prevents accidental contact with the rotating parts.
  To be able to determine the effective torques, the force measurement measures the deflection of bending beams. Inductive speed sensors on all drive gears allow the rotational speeds to be measured. The measured values are transmitted directly to a PC via USB. The data acquisition software is included. The angular acceleration can be read from the diagrams. Effective mass moments of inertia are determined by the angular acceleration.
  The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments. 

Learning Objectives / Experiments
- determine the transmission ratio for a locked gear
- measure transmitted forces for a locked gear
- gear acceleration under constant driving torque
- influence of the transmission ratio
- determine reduced mass moment of inertia
- conversion of potential energy into kinetic energy
- determine friction
- determine gear efficiency

* Two-stage planetary gears with three planet gears

* Four different transmissions can be configured1
* Bending beams to measure force1
* Inductive speed sensor and line recorder for speed-

  time diagrams to determine the angular acceleration1
* GUNT software for data acquisition

Alternative products
GL 210 -- Dynamic Behaviour of Multi-Stage Spur Gears
TM 123 -- Spur Gear Lifting Apparatus

[1] investigation of the dynamic behaviour of a 2-stage planetary gear
[2] three planet gears per stage
[3] four different transmission ratios possible
[4] gear is accelerated via cable drum and variable set of weights
[5] weight raised by hand crank; ratchet prevents accidental release
[6] clamping roller freewheel enables free further rotation after the weight has been released
[7] shock absorber for weight
[8] transparent protective cover
[9] force measurement on different gear stages via 3 bending bars, display via dial gauges
[10] inductive speed sensor
[11] GUNT software for data capture via USB under Windows Vista or Windows 7


Technical Data

2-stage planetary gear
- module: 2mm
- sun gears: 24-tooth, d-pitch circle: 48mm
- planet gears: 24-tooth, d-pitch circle: 48mm
- ring gears: 72-tooth, d-pitch circle: 144mm
- set of weights: 5...50kg
- max. potential energy: 245,3Nm
Load at standstill:
- weight forces: 5...70N


Measuring range
- speed range: 0...2.000min-1

Dimensions and Weight
LxWxH: 940x590x1.680mm
Weight: approx. 163kg
Required for Operation
120V, 50/60Hz, 1 phase or 230V, 60Hz, 1 phase
Scope of Delivery
1 trainer
2 sets of weights
1 CD with GUNT software + USB cable
1 set of instructional material
Order Details

030.21200  GL 212  Dynamic Behaviour of Multi-

                                 Stage Planetary Gears

© 2005 G.U.N.T. Gerätebau GmbH