deltalab - introduction ex1100 - en

8/11/2019 Deltalab - Introduction EX1100 - En

1/7

Deltalab - Introduction

EX1100 - En.doc

Braking roller bench EX1100/EX1110 Page 1

PW SUPPORT

BRAKING ROLLER BENCHEX1100 and EX1110

Photo of bench EX1100


2/7


EX1100 - En.doc


Braking roller

PRESENTATION OF PRODUCT. GRAVITY DISPLACEMENTSTORAGE

The R7500 BRAKING ROLLER can be integrated in an assembly of material intended for the

storage and gravity displacement of pallets.

The principle of this type of storage is described by the drawing below:1- The pallets are arranged in roller corridors inclined towards the LOADING AREA

(pallet 6 on the drawing)

2- If the corridor is empty, the pallet descends the slope and arrives at the limit stop

(position of pallet 9)

3- The next pallets follow the same course and stop against the preceding pallet to form

a waiting line (pallet no. 8 stops against no. 9, no. 7 against no. 8, no.6 against no. 7)

4- To unload a pallet, e.g. no. 4, the limit stop which holds no. 4 is freed by blocking no. 3

pallet, no. 4 moves to the limit stop at the end of the corridor (vertically above no.

10). The pallet can then be removed at the UNLOADING AREA.

This is illustrated by pallet 5.


3/7


EX1100 - En.doc


Principle of gravity displacement storage

The speed of the pallets descending by gravity in the storage corridors, of which the gradient is

3.5%, acceleratesnaturally during their route. In addition, the weight of the pallets may reach

1200 kg. When the corridor is empty, the first pallet runs throughout the length of the

corridor (may be as much as 10 m) before it reaches a limit stop.One can easily imagine that allowing such a heavy pallet to take on an uncontrolled speed

constitutes a significant danger for people situated around the storage zone.

FUNCTION of the BRAKING ROLLER R7500

The R7500 roller is a centrifugal brake. It regulates a large range of loads from 50 kg to1200

kg, at 0.3 m/s maximumon an incline suitable for the load (generally 3.5%) i.e. an incline of 2.

The main function of this mechanism is therefore to regulate the speed, or to stabilizethe

speed of the pallet.


4/7


EX1100 - En.doc


Presentation of the braking roller bench EX1100 and the valisetteEX1110

The roller of the type 7302 is a mechanical system which is positioned in the dynamic storage

corridors. Its aim is to control the gravitational speed of the loads transported. This roller can

be used to slow down loads weighing between 35 kg to 1000 kg.

The EX1100 bench is composed of a section of storage corridor, (1300 mm in length) consisting

of two rails of rollers and equipped with a braking roller.

The inclination of the corridor can be adjusted between 0 and 6 by steps of 1. A pallet which

can be loaded with weights of 1 Kg (5 positions for 10 Kg = 50 Kg), moves in the storage corridor.

Several sensorsevaluate the performance of the braking roller during normal functioning:

- a rotation speed sensor for the roller drum;

- a speed sensor for the translation of the pallet;

-an extensometric sensor allows the recording of the normal and tangential load of thepallet/roller contact

These recordings allow the analysis of the dynamic contact phenomenon between the roller and

the pallet.

A dedicated softwarecontrols these acquisitions in real time.

This bench is therefore an ideal and original support for the study of thedynamic of solids


5/7


EX1100 - En.doc


Examples of measurements carried out


6/7


EX1100 - En.doc


OBJECTIVES AND SYNTHESIS OF THE PW SHEETS

ObjectivesThe technological wealth of the support means that this PW series has multipleobjectives:

- characterize the behavior of the linear contact between the braking roller

and the surface of the pallet (sliding, normal and tangential loads,) ;- carry out dynamic modeling of the fall of the pallet with the aid of the basic

principle of dynamics;

- carry out energy modeling with the aid of the theorem of kinetic energy andassess the energy of the braking roller system (how the kinetic energy ofthe pallet is dissipated) ;

- carry out and analyze the measurements (kinematic and load) with the aid ofan efficient acquisition device and compare them with the results of the model.

Key wordsKinematic of solids, dynamic of solids, the law of friction between solids (Coulomb),epicycloidal gear train, centrifugal brake, Willis equation, basic principle of dynamics,

kinetic energy theorem

The table below shows that all thecenters of interestapproached, enable an in-depth study of the dynamic and energy aspects of solids as part of the program forBTS, CPGE PSI and PTclasses.

N TP Centres of interest Part concerned

TP 1 Kinematic of solids. Rolling withoutsliding. Willis equation

Valisette EX1110

TP 2 Simple dynamic modeling. Basic

principle of dynamics. Kinetic energytheorem

Valisette EX1110

TP 3 Resistance of materials. Elasticity.Dimensioning parts

Valisette EX1110.RDM Le Mans

TP 4 Dynamic modeling. Contacts. Slidingfriction coefficient. Measurements

Valisette EX1110

TP 5 Improved dynamic modeling. Braking

efficiency.Graphic and analyticalstudy. Measurements.

Valisette EX1110 and

bench EX1100

TP 6 Evaluation of the friction induced by Bench EX1100


7/7


EX1100 - En.doc


the carrying rollers. Measurements

TP 7 Research and evaluation of the energylosses in the braking and carrying

roller systems. Measurements

Bench EX1100

TP 8 Characterization of the brakingroller/pallet contact. Sliding and RSG.Measurement of the normal load N and

the tangential load T.

Bench EX1100

TP 9 Volume modeling of the braking rollersystem.Dynamic simulation of the braking

roller.Influence of the various parameters.

Solidworks and Meca3D

deltalab - introduction ex1100 - en

Documents