1, choose standard coupling.Designers in choosing a shaft coupling, the first should be already set for the national standards, mechanical industry standards, and won the national patent in the coupling of choice, only in the existing standard coupling and patent coupling coupling can’t meet the design need to need to own design.
2, choose coupling varieties, type
Understand the coupling (especially tyre coupling) in the transmission system of comprehensive functions, from the overall design, transmission system choose coupling varieties, type.Categories according to the type of prime mover and work load, working speed, the transmission accuracy, the condition of two axis deviation, temperature, humidity, comprehensive factors such as work environment to choose coupling varieties.According to the needs of supporting the host selection of coupling structure, when coupling with brake, should select band brake wheel or brake disc type coupling;When need to overload protection, should choose safe coupling;With the flange connection, the appropriate choice flange;Long distance transmission, coupled axial size is larger, the appropriate choice of by intermediate shaft type or model in the middle.
3, coupling torque calculation
The power should be greater than the workpiece machine drive system in the engine power required.Depending on the engine power and speed can be calculated with engine connected to the high-speed theory short moment T;According to the working condition of coefficient K and other related coefficient, torque Tc, can calculate coupling calculation.Coupling is inversely proportional to the T and n, so low end T is greater than the end of T.
4, primary coupling model
According to calculate the torque Tc, can be selected from the standard series similar nominal torque Tn, selection should meet Tn acuity Tc.Preliminary selected coupling model (specification), to be available in standard coupling allowable speed [n] and maximum axial and radial size D, size L0, satisfies coupling speed n [n] or less.
5, according to the diameter of axle adjustment models
Preliminary selected coupling dimensions, namely the axle hole diameter d and length of the shaft hole, L should conform to the requirements of the main, driven end diameter of axle, otherwise will adjust according to the diameter of axle d of the specifications of the coupling.Master and slave side different diameter of axle is a normal phenomenon, when the same torque and rotational speed, master and slave side trunnion don’t phase at the same time, should press to choose the big diameter of axle coupling model.The new design of transmission system, should choose to conform to the specified in GB/T3852 seven shaft hole type, J1 type is recommended for the shaft hole pattern, in order to improve the versatility and interchangeability, the rules of the shaft hole length by coupling product standard.
6, select connection type
Coupling type choice depends on the main, driven end shaft connection type, generally USES the linkage, for unification linkage type and code, the provisions in the GB/T3852 seven key type, four kinds of keyless connection, use morer is type A key.
7, the coupling selected varieties, type, specification (type)
Categories according to the engine and the coupling load, speed, comprehensive factors such as work environment, the selected gear coupling varieties;According to the coupling of form a complete set, connecting factors such as the coupling type selected;According to the nominal torque and shaft hole diameter and the length of the shaft hole designated specifications (models).In order to ensure the shaft and the bond strength, after the selected coupling model (specifications), shaft and bond strength check calculation, to finally determine the coupling model.