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Products | Theory of Machines and Properties of Materials | Theory of Machines | GL 212

GL 212

Two-Stage Epicyclic Gear Apparatus

Technical Description

GL 212 consists of 2 identical epicyclic gear stages with 3 planet wheels each. They are coupled in a way that the ring gear of the first stage is connected to the planet carrier of the second stage. Up to 4 different transmission ratios can be realised by blocking single wheels. The gears are driven using a cable drum and a variable set of weights that are lifted using a removable crank.
Unwinding is prevented by a detent pawl. To determine effective torque, the deflection of a bending beam is used to measure forces. The speeds of the stages are measured by inductive sensors and can be recorded as speed-time diagram using a chart recorder. Effective moments of inertia are determined via angular acceleration. A transparent safety cover prevents unintentional contact with rotating parts.

Learning Objectives / Experiments

- Determination of transmission ratios at blocked
gear
- Determination of transmitted forces at blocked gear
- Gear acceleration at constant driving torque
- Influence of transmission ratio
- Determination of reduced moment of inertia
- Conversion of potential into kinetic energy
- Determination of friction
- Gear efficiency

Features

* Investigation of rotational dynamics of a two-stage
epicyclic gear
* Inductive speed sensors
* Chart recorder for speed-time diagrams to determine
the angular acceleration

Alternative products

GL 210 -- Geared System Apparatus
TM 123 -- Spur Gear Lifting Apparatus

Specification

[1] Study of dynamic behaviour of a two-stage epicyclic gear
[2] 4 different gear transmissions possible
[3] Drive via cable drum with free-wheel, unwinding prevented by a detent pawl
[4] Drive weight 5...50kg
[5] Holder (container) with a shock absorbing inlet to collect the drive weight
[6] Inductive speed sensors
[7] Force measurement via bending beam
[8] Chart recorder for speed-time diagrams, paper feed 7200mm/h
[9] Transparent plastic safety cover
[10] 230V, ~50Hz

Technical Data

Gear, modulus: 2, sun wheels, planet wheels: z=24, d-reference circle: 48mm, ring gears: z=72, d-reference circle: 144mm
Drive: cable drum with free-wheel and weights, max. potential energy stored: 245.3Nm
Load at stand still: weight for torque measurement at bending beam: 5...70N
Dial gauges: accuracy 0.02mm
Chart recorder: chart width: 100mm, paper feed: 7200mm/h, speed range: 0...2000rpm

Dimensions and Weight

l x w x h : 1000 x 650 x 1700 mm
Weight : approx. 150 kg

Connections

230V, ~50Hz

Scope of Delivery

1 apparatus, complete,
1 instruction manual

Order Details

030.21200 GL 212 Two-Stage Epicyclic Gear Apparatus