Method of balancing a suction unit comprising a ventilator and an electric motor

Abstract

A method of manufacturing an electrical suction unit for use in a vacuum cleaner includes a turbine unit and an electrical motor with a rotor and a stator. The turbine unit is attached to the rotor and forms, together with the rotor, a rotatable part of the suction unit, which is rotatable about an axis of rotation. An amount of material is removed from the rotor and from the turbine unit to torque-balance the rotatable part of the suction unit. In this manner, the amount of material to be removed from the rotor to torque-balance the rotatable part is considerably reduced, so that the adverse influence of the removal of the material from the rotor on the performance of the electrical motor is limited.

1 - 6 . (canceled) 
   
   
       7 . A method of balancing an apparatus rotatable about an axis of rotation and including a turbine unit mounted to a rotor of a motor comprising the acts of:
 removing an amount of material from the rotor in order to torque-balance the rotatable part; and   in order to torque-balance the rotatable part, removing an amount of material from the turbine unit.   
   
   
       8 . The method of  claim 7 , wherein the amount of material that is removed from the rotor is situated near a side of the rotor facing away from the turbine unit. 
   
   
       9 . The method of  claim 7 , wherein the amount of material that is removed from the rotor is situated in a plane extending perpendicularly to the axis of rotation and through a center of gravity of the rotatable part. 
   
   
       10 . The method of  claim 7 , wherein by removing the amount of material from the turbine unit, the turbine unit itself is provided with a static imbalance equal to and oppositely directed to a static imbalance with which the rotor itself is provided by removal of the amount of material from the rotor. 
   
   
       11 . The method of  claim 7 , further comprising the acts of:
 measuring a torque imbalance of the rotor itself;   determining a static imbalance with which the turbine unit and the rotor are to be provided to compensate for the measured torque imbalance of the rotor;   providing the rotor with the static imbalance,   mounting the rotor to the turbine unit; and   torque-balancing the rotatable part by providing the turbine unit with the static imbalance.   
   
   
       12 . A suction unit rotatable about an axis of rotation comprising:
 a motor having a rotor; and   a turbine unit mounted to the rotor of the motor;   wherein an amount of material is removed from the rotor in order to torque-balance the rotatable part, and   wherein in order to torque-balance the rotatable part, an amount of material is removed from the turbine unit.   
   
   
       13 . The suction unit of  claim 12 , wherein the amount of material that is removed from the rotor is situated near a side of the rotor facing away from the turbine unit. 
   
   
       14 . The suction unit of  claim 12 , wherein the amount of material that is removed from the rotor is situated in a plane extending perpendicularly to the axis of rotation and through a center of gravity of the rotatable part. 
   
   
       15 . The suction unit of  claim 12 , wherein by removing the amount of material from the turbine unit, the turbine unit itself is provided with a static imbalance equal to and oppositely directed to a static imbalance with which the rotor itself is provided by removal of the amount of material from the rotor. 
   
   
       16 . The suction unit of  claim 12 , wherein the turbine unit and the rotor are provided with a static imbalance to compensate for a torque imbalance of the rotor. 
   
   
       17 . A vacuum cleaner which is provided with an electrical suction unit rotatable about an axis of rotation, the electrical suction unit comprising a turbine unit mounted to a rotor of a motor, wherein an amount of material from the rotor is removed in order to torque-balance the rotatable part; and in order to torque-balance the rotatable part, an amount of material is removed from the turbine unit. 
   
   
       18 . The vacuum cleaner of  claim 17 , wherein the amount of material that is removed from the rotor is situated near a side of the rotor facing away from the turbine unit. 
   
   
       19 . The vacuum cleaner of  claim 17 , wherein the amount of material that is removed from the rotor is situated in a plane extending perpendicularly to the axis of rotation and through a center of gravity of the rotatable part. 
   
   
       20 . The vacuum cleaner of  claim 17 , wherein by removing the amount of material from the turbine unit, the turbine unit itself is provided with a static imbalance equal to and oppositely directed to a static imbalance with which the rotor itself is provided by removal of the amount of material from the rotor. 
   
   
       21 . The vacuum cleaner of  claim 17 , wherein the turbine unit and the rotor are provided with a static imbalance to compensate for a torque imbalance of the rotor.