Rigid couplingIt is divided into flange coupling, radial key flange coupling, sleeve coupling, clamp coupling and parallel shaft coupling.
The material of the flange coupling can be gray cast iron and carbon steel, and cast steel or forged steel should be used for heavy load or when the peripheral speed is greater than 30 m/s.Flange couplings have very high requirements for the neutrality of the two shafts. When the two shafts have relative displacement, they will cause additional loads on the machine parts and worsen the working conditions. This is its main disadvantage.However, due to its simple structure, low cost, and large torque transmission, it is often used when the speed is low, there is no impact, the shaft has high rigidity, and the neutrality is good.
The main processing procedures of flange coupling include boring, cutting and keyway trimming before assembly of the coupling sleeve hole, coupling end face and other processing.The shaft sleeve hole of the semi-coupling has two forms: a conical hole and a cylindrical hole. The conical hole has more advantages in process characteristics than the cylindrical hole.The conical shaft sleeve hole is easy to obtain concentricity between the mating parts, the contact between the coupling and the shaft mating surface can achieve a better fit, and the inspection is also convenient, so the use of conical holes is more common.