1. Use standard coupling. When designers when selecting the coupling should first have been developed as a national standard, mechanical industry standards and national patent couplings select only existing standard couplings and patent couplings can not meet the design requirements need to design their own coupling.

2. Select the coupling varieties, types. Learn coupling integrated functions in the drive from the drive system overall design considerations, choose coupling varieties, types. Choose varieties coupling according to a combination of factors mover class and working load category, operating speed, driving accuracy, two-axis offset, temperature, humidity, and work environment. According to need to select the type of coupling structure supporting the host, when coupling and supporting the use of the brake, brake wheel should choose the type of coupling or brake disc; overload protection when required, should choose safety couplings ; when coupled with the flange, should choose flange; long-distance transmission, the coupling of a larger axial dimension, should choose the connection type or the intermediate shaft connected to intermediate dwelling.

3. The coupling torque calculation. Power machine of power transmission system should be greater than the workpiece machine power required. According to power machine of power and speed and power machine computability theory coupled to receive a high-speed end of the short moments T; K coefficient according to operating conditions and other relevant factors, calculate the coupling calculation of torque Tc. Coupling T and inversely proportional to n, and therefore greater than the high-speed low-end T end T.

The primary coupling model. According to calculations torque Tc, can be selected from the standard series approximating nominal torque Tn, selection should meet Tn≥Tc. Xu initially selected coupling models, from standard couplings can look up the rotation speed [n] and maximum radial dimension D, the axial dimension L0, to meet the coupling speed n≤ [n].

5. Shaft adjustment models. The coupling connection initially selected size, namely the shaft and the shaft bore hole diameter d length L, should be consistent with the main, driven end shaft diameter requirements, or even adjust the size of the coupling according to the shaft diameter d. Lord, driven end shaft diameter is not the same as an ordinary phenomenon, when the torque at the same speed, the main, driven end shaft diameter is not the same, shall select the coupling model large shaft diameter. The new design of the drive system, should select one of seven shaft hole pattern in line with GB / T3852 prescribed, recommended J1 type shaft hole pattern to improve the versatility and interchangeability, the shaft hole length by coupling product standards ???

6. Select the connection type. Coupling connection type of choice depends on the driving and driven shaft end on the coupling patterns, the general key connection for unified key connection type and code, in GB / T3852 stipulated seven keyway type, four keyless coupling , used more type A button.

7. Coupling selected varieties, style, size. According to a combination of factors and coupling load power machine category, speed, working environment, selected varieties coupling; coupling according to factors supporting, coupling and so selected coupling type; according to the nominal torque, the shaft hole diameter and the length of the shaft hole size selected. In order to ensure the strength of the shaft and key, after selecting the coupling model, coping shaft and bond strength to do checking checking, to finalize the coupling models.

Installation and maintenance of the coupling

Coupling dimensions, namely, the maximum radial and axial dimensions, must allow space for installation of machinery and equipment within. You should choose easy assembly and disassembly, no maintenance, maintenance of long or easy maintenance, replacement of wearing parts without moving the two shafts period of adjustment easy coupling.

Large-scale machinery and equipment for the two-axis adjustment more difficult, should choose to use durable and easy to replace wearing parts of the coupling. Metal elastic element of flexible couplings in general than non-metallic flexible coupling elastic element long life. Require lubrication and the use of non-durable sealing couplings, will increase the maintenance workload. For long-term continuous operation and high economic efficiency of the occasion, such as China's metallurgical enterprises in the high-speed end mill drive system, now widely used in the gear coupling, gear coupling Although theoretically transmit torque, but must be lubrication and seal durable good conditions to work. And the need to regularly check the seal condition, injection lubricating oil or grease, maintenance workload, increased aid work, reducing the effective working time, affecting production efficiency. International industrial countries, have common use long life, no lubrication and maintenance diaphragm coupling along replace the drum gear coupling, not only improve economic efficiency, but also purify the working environment. In the selection of the mill drive system developed by the elastic pin coupling and live segments flexible coupling, not only has the advantage of a diaphragm coupling, and a good buffer damping effect, the price is cheaper.