Flange couplings are widely used connection devices in mechanical transmission. They connect two shafts together via flanges to transmit torque and rotational motion.
1. Nominal Torque: This is the maximum torque value that the flange coupling can transmit, usually measured in N·m (Newton-meter). The selection of the nominal torque should be determined based on the actual requirements of the transmission system, ensuring that the coupling can withstand the maximum torque during operation while avoiding excessive torque that could damage the coupling.
2. Shaft Hole Diameter: The shaft hole diameter of the flange coupling should match the diameter of the connected shaft to ensure that the coupling fits tightly on the shaft and prevents relative movement during transmission. The shaft hole diameter is usually determined by the shaft diameter; common shaft hole diameters include Φ20mm, Φ25mm, and Φ30mm.
3. Flange Diameter: The flange diameter is an important dimensional parameter of the flange coupling, determining the contact area when the coupling is connected to the mechanical equipment. A larger flange diameter generally results in better stability during connection, but it also increases the weight and cost of the coupling. Therefore, when selecting the flange diameter, factors such as the requirements of the transmission system, the structural characteristics of the equipment, and cost must be considered comprehensively.
4.Bolt hole number and diameter: Flange couplings connect two flanges together using bolts. The number and diameter of the bolt holes directly affect the strength of the connection. The number of bolt holes is usually determined by the flange diameter, commonly 4, 6, or 8. The bolt hole diameter should be determined based on the specifications of the selected bolts to ensure that the bolts can pass through smoothly and be tightened securely.