Retsch AS 200 control - natural frequency Manuel d'utilisateur télécharger pdf (Page 23)

Retsch GmbH 23

Acceleration guide values

In the technical literature* on plant engineering sieve bottom

acceleration in „g“ is designated as the sieve characteristic

value K , and the relationship between the sieve characterisitc

value and sieving effect is described as follows:

(„g“)

Sieved

material

movement

Sieving evaluation

1,0

No throwing,

flowing or sliding

movement

Very sluggish sieving effect, sieve

bottom is quickly blocked

1,5

Poor lifting of

sieved material

Sluggish sieving effect, sieve

bottom blocked slowly

1,8

Very flat throwing

action

Very gentle sieving for easily

sievable material

2,3

Flat to slightly

steep throwing

action

Gentle sieving for material difficult

to sieve

3,5

Steep throwing

action

Precise sieving

Very steep

throwing action

Very precise and loosening sieving

action

We have taken the liberty of supplementing the information

with the associated amplitudes for the two most common

mains frequencies in the world.

These data can be regarded only as guide values for small

quantities of sieved material if, owing to its distribution

characteristics, the material moves mainly under single grain

conditions on the sieve bottom.

However, under the usual thick layer conditions (multiple grain

layers) in the laboratory the impulses transmitted from the

sieve bottom are damped, and the sieve bottom of the

analytical sieve also vibrates. Therefore in laboratory practice

higher K-values are necessary than those resulting from

individual grain dynamics. In practice this means that the

above recommendations should be multiplied by a factor of 1.5

– 2.

* Höffl, K.

Milling and classifying machines

Springer-Verlag 1986

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 31 32

Commentaires sur ces manuels

Pas de commentaire

Retsch AS 200 control - natural frequency Manuel d'utilisateur Page 23

Commentaires sur ces manuels

Produits connexes et manuels pour Équipement Retsch AS 200 control - natural frequency