Specific analysis of the characteristics of rigid coupling types

　    Rigid couplings are divided into flange couplings, radial key flange couplings, sleeve couplings, clamp couplings and parallel shaft couplings. Rigid couplings are divided into assembly type and integral forging There are two types.Assembled rigid coupling is the method of two halves of the coupling with hot sleeves and double keys respectively, set on their respective shaft ends, then locate the center and reaming holes, and then fasten them with bolts;
　　1. Flange coupling: a coupling that uses bolts to connect the flanges of the two halves of the coupling to realize the two-axis connection
　　2. Radial key flange coupling: a coupling that uses radial keys and ordinary bolts to connect two halves of the coupling
　　3. Sleeve coupling: a coupling that uses a common sleeve to connect two shafts in a certain way
　　4. Clamping housing coupling: a coupling that uses two axially split clamping housings to be clamped in a certain way to achieve two-axis connection
　　5. Parallel shaft coupling: a coupling that uses an intermediate plate to pass through a pin shaft to realize the connection of two parallel shafts
      Rigid couplings were also called fixed rigid couplings in the past, including flange couplings, radial key flange couplings, open shaft couplings, clamp couplings, sleeve couplings Wait.Rigid couplings are generally simple in structure and low in manufacturing cost.When selecting a rigid coupling, the axis alignment error of the connected two shafts should be minimized. In order to reduce the impact of the additional load on the coupling, the distance between the coupling and the bearing should be minimized.Flange coupling (also known as flange coupling) is a half-coupling that connects two flanges (flanges) with bolts.
       Rigid couplings have two main structural forms: ①rely on reamed holes and bolts to realize the two-axis alignment and rely on the bolt rod to bear extrusion and shear to transmit torque; ②rely on the convex half of the coupling The shoulder is centered by matching the groove on the other half coupling.The bolts connecting the two half-couplings can use ordinary bolts of grade B and the torque is transmitted by the frictional moment of the joint surface of the two half-couplings.The material of the rigid coupling can be gray cast iron or carbon steel, and cast steel or forged steel should be used under heavy load or when the peripheral speed is greater than 30 m/s.