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Products | Theory of Machines and Properties of Materials | Theory of Machines | GL 112

GL 112

Cam Analysis Apparatus

Technical Description

The GL 112 allows the dynamic investigation of cam mechanisms, as used in motors for actuation of the valves. The cam mechanism consists of 4 interchangeable cam plates and 2 different tracers. A mass and a spring are used to simulate the valve. In order to demonstrate the so-called "valve wobble", the spring rate, mass and speed are adjustable within broad limits. A plotter allows the actual lift curves to be recorded. The open design allows the observation of every detail of the movement process. A stroboscope (not supplied) can be used to provide a particularly impressive view of the movement process and lift. The unit is intended for demonstration purposes in technical education. It is not suitable for use as a test stand for fatigue testing.

Learning Objectives / Experiments

- Comparison of different cam forms
- Lift curves for non-matching tracer
- Lift curve for skipping tracer
- Determination of limit speed and comparison with
theory
- Influence of moving mass
- Influence of restoring spring rigidity

Features

* 4 different cams, 2 different tracers₁
* Influence of spring rigidity and moving mass₁
* Plotting of lift curves₁
* Excellent observation of movement process

Alternative products

GL 110 -- Cam Mechanism

Specification

[1] Benchtop unit for investigation of cam mechanisms
[2] 4 cams: tangent, hollow cam, 2 circular cams with different head radius
[3] Tappet with 2 different tracers: flat or roller tappet
[4] 3 interchangeable restoring springs
[5] Electric motor with speed control
[6] Moving mass with can be lifted with 5 additional weights; attached to tappet
[7] Mechanical drum plotter with plotting spring and coated paper
[8] 230V, 50/60Hz, 1 phase or 120V, 50/60Hz, 1 ph.

Technical Data

Three-phase asynchronous motor with frequency converter:

- power: 250W

- speed: 60…670rpm
Cams:

- 15mm lift

- opening angle: 140°
Spring rigidity:
- hard: 5026N/m
- medium: 2601N/m

- soft: 613N/m
Masses:

- additional weight: 200g

- tappet: 530g

- flat tappet: 93g

- roller: 20g
Plotter: synchronous belt drive
Optical speed sensor

Dimensions and Weight

l x w x h : 800 x 435 x 440 mm
Weight : approx. 50 kg

Connections

230V, 50/60Hz, 1 phase or 120V, 50/60Hz, 1 phase

Scope of Delivery

1 unit, 4 cams, 2 tracer, 3 restoring springs, 3 blocks of plotter paper, 1 combination wrench, 1 hexagon screwdriver, short, 1 instruction manual

Order Details

030.11200 GL 112 Cam Analysis Apparatus