Where we are Via Campania, 40 Fizzonasco di Pieve Emanuele | Milano | ITALY
Email info@coelmotori.it
Telephone +39.02.90420039
Search

INSTALLATION - BRAKE CHOICE

INSTALLATION - BRAKE CHOICE

INSTALLATION

IEC LINE

The IEC line brakes are easy and immediate to be installed. They can be mounted onto IEC B5 motors without any modification.
Recommendation: in order to avoid alignment deviations, we always recommend to use electric motors with output flanges and shafts work out in precision class in particular for frames 225 to 315.
Always control the output tolerance of the motor shaft and flange and orthogonality between them before assembling the VIS brake.
Before positioning the brake and inserting the shaft to the VIS hub, we suggest to add grease on them.

NEMA LINE

The NEMA line brakes are easy and immediate to be installed. They can be mounted onto NEMA C-face motors without any modification.
Recommendation: in order to avoid alignment deviations, we always recommend to use electric motors with output flanges and shafts work out in precision class in particular for frames 324 and above.
Always control the output tolerance of the motor shaft and flange and orthogonality between them before assembling the VIS brake.

Before positioning the brake and inserting the shaft to the VIS hub, we suggest to add grease on them.

COMPACT LINE

The VIS compact line is supplied with an hollow shaft with key suitable to be assembled to a keyed shaft.
The VIS input shaft is mounted on 2 bearings; it is important to avoid any axial load on the shaft.
Before positioning the brake and inserting the shaft to the VIS hub, we suggest to add grease on them.
Once the shaft is positioned, secure the VIS flange to the coupling flange checking the absence of air gap between them.
The surface where brake is coupled must be a solid cast iron or steel or aluminum one.


BRAKE CHOICE

The size of the brake is mainly determined by the braking torque and the relevant inertia of the load, braking time, speed, number of starts per hour.

The calculation of the brakes is generally related to the permissible friction energy. Since the VIS is an explosion proof unit, we simply defined a limit related to the maximum allowable sliding time of the disc in dynamic application. This time is fixed in maximum 0,5 seconds.

This solution gives a simple parameter to choose the brake in a correct, easy and safe way.

For further detailed calculation regarding your application or in case of longer sliding time of the disc, please contact us.

Brake Torque And Braking Time

It is possible to define the braking time of the motion using the following formula:

        J tot x n                       tx               
_________________    +  _____________
9.55 (Mf ± Mload)             1000   

Jtot: inertia moment at the motor shaft (Ggm2)

tx: brake time response (ms)

Mload: resistent moment to the load applied (Nm), positive or negative depending on concordance with brakung moment.