The godet roller, for use with melt spun filaments, has a spring to apply a static pressure to the roller bearings and an actuator, operated by compressed air, to adjust the spring pressure according to the working conditions

摘要

The godet roller, to feed or draw or heat melt spun filaments, has a roller mantle (1) to carry the filaments. A spring (7) is between the roller bearings (4,5) to generate a static boost pressure force. A controlled actuator (8) generates a tension which is aligned to the static boost pressure on the roller bearings. The specification is an addition to 10058757.7. The godet roller, for use with melt spun filaments, has a controlled actuator to generate a tension which gives a static boost pressure on the roller bearings above the minimum level when in operation. The actuator is a piston/cylinder unit, between the drive shaft (2) and the carrier (3), with a step piston (9) in a spaced ring around the drive shaft. The end side of the piston is against a roller bearing (5), and forms a pressure zone with the carrier. The pressure zone is connected to a compressed air supply (18) through a control valve (17). A second actuator can be fitted, to relieve pressure, and counter the pressure of the spring against the roller bearings, as a piston/cylinder unit between the drive shaft and the carrier. Both actuators are controlled to keep the spring pressure above a minimum level, when the roller is in operation. Both actuators can have a common step piston, with axial movement, in a ring spaced around the drive shaft, with one end side against a roller bearing to form two pressure zones with the carrier. The pressure zones are connected alternately to a compressed air supply through at least one control valve. A number of cooling channels are at the roller bearings and/or cooling zones are in or at the carrier, connected separately or together to the compressed air supply. Each cooling channel/cooling zone has an opening for the escape of the compressed air. The compressed air supply is a compressor.