Introduction:
Locking assembly, as transmission components with keyless connection structures, are widely used in industrial machinery. Compared with general interference and key connections, they have the following advantages when used in large wind turbines
The way of transmitting torque through the locking assembly
Connection is that the shaft and hole do not require high manufacturing accuracy like the interference fit to ensure the interference amount. The torque is transmitted by applying a radial positive force to the drive shaft hole. Easy to install, without the need for heating, cooling, and other equipment.
The service life of the locking assembly is long, meeting the 20 year service life requirements of wind power. The locking assembly does not weaken the keyway of the connected parts, nor does it have relative movement, so there will be no wear during operation
The locking assembly connection is easy to disassemble and has good interchangeability. Due to the ability of the locking assembly to combine the shaft hub with larger fitting clearance, loosening the bolts during disassembly can make the connected parts easy to disassemble. When tightening, press the contact surface tightly to prevent rust contact and facilitate connection and disassembly
When the locking assembly is severely overloaded, it will lose its connection function and can protect the equipment from damage.
Structure and working principle of locking assembly used in wind turbine
The locking assembly structure is composed of three parts : outer ring, inner ring and bolt group.
The working principle : screwing the bolt group, under the action of the tensile force of the bolt, the inner ring moves along the contact surface and squeezes. Within a certain range of extrusion pressure, the locking assemly the shaft sleeve and the main shaft are all elastomers. The inner diameter of the inner ring is reduced under the action of extrusion pressure, and further squeezed with the surface of the shaft sleeve. After the shaft sleeve is squeezed, it is further squeezed and the main shaft is held tight.
Under the action of the static friction force between the shaft sleeve and the spindle, the torque from the wind turbine impeller ( blade ) is transmitted to the shaft sleeve ( planet carrier ) through the spindle, thus completing the transmission of torque between the two mechanical parts of the wind turbine.
Post time: Jan-12-2024