Couplings are mostly used in machine tools and semiconductor machinery. In addition to their high rigidity, the coupling should also have the ability to withstand repeated torsional loads and high elastic fatigue limits. The working environment is one of the important factors to consider when choosing a coupling, such as temperature, humidity, water, steam, dust, sand, oil, acid, alkali, corrosive media, salt water, radiation and other conditions. For the working quality of high temperature, low temperature, oil, acid and alkali medium, it is not suitable to choose the flexible coupling with general rubber as the elastic element material, but the flexible coupling with metal elastic element, such as diaphragm coupling, Serpentine spring coupling, etc.

The diaphragm coupling is composed of two flange half couplings and a set of diaphragms that are fastened by screws to achieve rotation. The following requirements should be paid attention to when installing:

(1) Wipe clean the dust and dirt on the surface of the installation shaft, and apply a thin layer of engine oil or lubricant to the counterpart;

(2) Clean the inner hole of the diaphragm coupling and wipe with oil or lubricant;

(3) Insert the diaphragm coupling into the mounting shaft. If the aperture is too tight, be careful not to hit the installation with a hammer or hard metal;

(4) After the positioning is completed, first use a torque wrench (the specified tightening torque 1/4) to tighten the screws according to the diagonal direction;

(5) Increase the strength (1/2 of the specified tightening torque) and repeat the fourth step;

(6) Tighten the tightening torque according to the specified tightening torque;

(7) Then, tighten the fixing screws in the circumferential direction