Lenze MDFQA Operating Instructions - Manual (Page 22)

Mechanical installation
Holding brake (option)
Installation
5
EN
22 Lenze ¯ BA 33.0006 ¯ 3.0
5.3.1 Installation
Important notes
¯ The mounting surface must be dimensioned for the design, weight and torque of
the motor.
¯ The foot and flange faces must rest flat on the mounting surface.
– Incorrect motor alignment reduces the service life of the roller bearings and
transmission elements.
Impacts on shafts can cause bearing damage.
¯ Do not exceed the permissible range of ambient operating temperature ( ¶ 19).
¯ Fasten the motor securely.
¯ Ensure that the ventilation is not impeded. The exhaust air, also the exhaust air of
other machines next to the drive system, must not be taken in immediately.
¯ During operation, surfaces are hot, up to 140 °C! Ensure that guard preventing
accidental contact is in place!
Ensure an even surface, solid foot/flange mounting and exact alignment if a direct
clutch is connected. Avoid resonances with the rotational frequency and double mains
frequency which may be caused by the assembly.
Use appropriate means to mount or remove transmission elements (heating) and cover
belt pulleys and clutches with a touch guard. Avoid impermissible belt tensions.
(
Stop!
Ensure a correct belt tension!
The machines are halfkey balanced. The clutch must be halfkey balanced, too. The
visible jutting out part of the key must be removed.
Designs with shaft end at the bottom must be protected with a cover which prevents
the ingress of foreign particles into the fan.
5.4 Holding brake (option)
Important notes
As an option, the motors can be fitted with a brake. The installation of brakes (in or on
the motor) increases the length of the motor.
)
Note!
The brakes used are not fail−safe because interference factors, which
cannot be influenced (e.g. oil ingress), can lead to a reduction in torque.
The brakes are used as holding brakes and serve to hold the axes at standstill or in the
deenergised state.
Emergency stops at higher speeds are possible, but high switching energy increases
wear on the friction surfaces and the hub (see wear of brakes, page 25 and 26).