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Coupling composition and fixed shaft damage cause

Introduction:
Because of the manufacturing and installation errors, deformation after bearing and the influence of temperature change, the two axes connected by the coupling will cause the change of the relative position of the two axes, often can not ensure the strict alignment. Coupling can be divided into rigid coupling, flexible coupling and coupling according to whether the coupling has elastic parts, whether it has compensation ability for various relative displacements, that is, whether it can maintain the coupling function under the premise of relative displacement and the use of coupling. The main types and characteristics of couplings and their roles in the transmission system.

Coupling fixing method:
Coupling fixing method is shaft shoulder, shaft ring, shaft extension, sleeve. Round nut, shaft end retaining ring, shaft shoulder, shaft ring, shaft extension is characterized by simple structure, reliable positioning, can withstand large axial force, often used in gear, sprocket, belt wheel, coupling and bearing positioning. The sleeve is characterized by simple structure, reliable positioning, no need for grooving, drilling and cutting threads on the shaft, so it does not affect the fatigue strength of the shaft. It is generally used for occasions where the gap between parts is small, so as to avoid increasing the weight of the structure, and the speed of the shaft is very high. Round nuts are characterized by reliable fixation, convenient installation and disassembly, and can withstand large axial force. Because of the shaft cutting thread, the fatigue strength of the shaft is reduced. It is commonly used to fix the shaft end parts with double round nuts and stop washers.

Coupling damage problem:
Friends often encounter coupling damage problems, and in general, we all think that the quality of the coupling, in fact, it is not. We need to check whether the torque of the coupling can reach the range of the current equipment; See if the shaft is concentric with the coupling, the shaft and the coupling of different heart is also easy to cause coupling damage; In addition to these two cases, the wear resistance and strength of the coupling fittings are also the reasons that make the coupling easy to damage. Flexible coupling without elastic components, not only can transfer motion and torque, but also has different degrees of axial, radial, angular compensation function including gear coupling, universal coupling, chain coupling, sliding block coupling, etc.
Flexible coupling with elastic element to transmit motion and torque; With different degrees of axial, radial, angular compensation function; Also has different degrees of damping, buffering effect, improve the working function of the transmission system, including a variety of non-metallic elastic components flexible coupling and metal elastic components flexible coupling, a variety of elastic coupling structure is different, the difference is large, in the transmission system role is not the same. Rigid coupling can only transfer motion and torque, drum gear coupling of several failures and causes, do not have other functions including flange coupling, sleeve coupling, clamp shell coupling, coupling calculation and two types of role.
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