Performance and characteristics of flange couplings:
The flange coupling is a rigid coupling that connects two half couplings with flanges to the two shafts using ordinary flat keys, and then connects the two half couplings with bolts to transmit motion and torque.
. There are two main structural forms of this type of coupling:
① The bolt is used to achieve two axis alignment by hinge holes, and the torque is transmitted by the bolt rod to withstand compression and shear
② Align by matching the shoulder on one half coupling with the groove on the other half coupling. The bolts connecting the two half couplings can be ordinary bolts of grade B, and the torque is transmitted by the frictional moment of the joint surface of the two half couplingsThe flange coupling has a high requirement for the two axes to be neutral. When there is relative displacement between the two axes, it will cause additional loads inside the machine, which will worsen the working condition. This is its main disadvantage. However, due to its simple structure, low cost, and ability to transmit large torque, it is often used when the speed is low, there is no impact, the shaft has high rigidity, and the neutral is goodIn alignment, it can transmit a large torque and requires the flange end face to be accurately perpendicular to the axis. Easy to process, no need for lubrication, easy to maintain and install, mainly used for connecting two shafts with relatively stable loadsThe mass and moment of inertia of the coupling are approximate calculated values based on the material being cast iron (cast steel in parentheses), small shaft hole, and large shaft extension lengthThe allowable speed of the coupling is based on the material of the casting, and the allowable linear speed is 30m/s; The approximate calculation of the allowable linear velocity of steel is 50m/sIn the column of bolt quantity, the bolts used for reaming holes are shown in parenthesesThe use of flange couplings should have protective devicesHalf coupling material: cast iron is HT2002; The cast steel is ZG270-500
