What are the steps to choose a coupling?

Four major steps for selecting a coupling:

1. Select the variety and type of i-bearing coupling:

Understand the comprehensive functions of the coupling (especially the flexible coupling) in the transmission system, and choose the type and type of the coupling from the overall design of the transmission system. According to the prime mover category and working load category, working speed, transmission accuracy, two-axis offset conditions, temperature, humidity, working environment and other comprehensive factors to select the type of coupling. Select the structure of the coupling according to the needs of the supporting host. When the coupling is used in conjunction with the brake, a coupling with a brake wheel or a brake disc should be selected; when overload protection is required, a safety coupling should be selected ; When connecting with flanges, the flange type should be selected; for long-distance transmission, when the axial size of the connection is large, the intermediate shaft type or the intermediate sleeve type should be selected;

2. Adjust the model according to the shaft diameter:

The initially selected coupling dimensions of the bearing coupling, that is, the shaft hole diameter d and the shaft hole length L, should meet the requirements of the shaft diameter of the driving and driven ends, otherwise the coupling specifications must be adjusted according to the shaft diameter d. It is a common phenomenon that the shaft diameters of the driving and driven ends are different. When the torque and speed are the same, and the shaft diameters of the driving and driven ends are different, the coupling model should be selected according to the larger shaft diameter. In the newly designed transmission system, the seven shaft hole types specified in GBT3852 should be selected, and the J1 shaft hole type is recommended to improve versatility and interchangeability. The shaft hole length is in accordance with the i-bearing coupling product standard. .

3. Choose standard coupling:

When choosing a coupling, the designer should first choose from the couplings that have been formulated as national standards, machinery industry standards, and national patents. Only when the existing standard couplings and patent ina bearing couplings cannot meet the design needs Only then need to design the coupling by yourself;

4. Torque calculation of bearing coupling:

The power of the power machine in the transmission system should be greater than the power required by the work machine. According to the power and speed of the power machine, the theoretical short moment T of the high-speed end connected to the power machine can be calculated; according to the working condition coefficient K and other related coefficients, the calculated torque Tc of the coupling can be calculated. The coupling T is inversely proportional to n, so the low-speed end T is greater than the high-speed end T.