Rigid coupling: http://www.btlzqc.com/gxlzq/1:JQ type - jacket coupling 

 ① clamp coupling is the use of two split along the axis of the folder shell, two-shaft, bolt clamping, rely on the transmission torque of the friction between the two halves of the coupling surface, use flat keys as an aid to join . 
 ② clamp coupling assembly and disassembly of shaft without axial movement, so disassembly is very convenient, the disadvantage is that the clamp coupling two shaft axis on the accuracy, 
 ③ structure and shape is more complex, manufacture and balance are less precise, is only applicable to low and stable load of occasions, usually the maximum line speed of the outer edge of not more than 5 m / s, when the line faster than 5m / s need to balance school inspection. 
 ④ order to improve the balance, the bolts should be positive, inverted white installation. The clamp coupling with axial, radial and angular compensation performance. 
 ⑤ vertical gain characteristics of the clamp coupling clamp coupling approximation, a simple structure, easy assembly and disassembly, apply to the low-speed (maximum circumferential speed of 5M / S), no impact, vibration load stable occasion should used for the connection of the vertical shaft of the stirrer. 
 JQ type - folder shell coupling (HG5-213-65) was characteristic of the vertical clamp coupling clamp coupling approximation, a simple structure, easy assembly and disassembly, suitable for low-speed (maximum circumferential speed of 5M / S), shock, vibration load stable occasions, should be used for the vertical shaft of the stirrer connection. Clamp coupling is the use of two split along the axis of the folder shell, in order to achieve the two-axis connection bolt clamping, rely on the transmission torque of the friction between the two halves of the coupling surface, flat key as an aid to join. Folder shell when the axis of the coupling assembly and disassembly without axial movement, so disassembly is very convenient, the coupling of the folder shell drawback is that the two shaft axis in precision, structure and shape is more complex, lower manufacturing and balancing precision applies only to low and stable load of occasions, usually the largest outer edge of the line speed is not greater than 5 m / s, when the line faster than 5m / s, the need for a balance check. 
 Flange coupling: 
 Flange coupling is a rigid coupling, two with flange coupling half with the two axis connection with an ordinary flat key, and then use the bolt to two and a half coupling fused to transmit motion and torque. This coupling there are two main forms of the structure of: ① rely on the pin hole on the bolt to achieve the two-axis and by the bolt shank to bear squeeze and shear transfer torque; ② rely on a coupling and a half, on convex shoulder and fits in the groove on the other coupling half. Connect the two and a half of the coupling bolts can be used Class A and Class B ordinary bolts, and torque depend on the two and a half coupling combined with the surface of the friction torque to pass. 
 Flange coupling materials available gray cast iron or carbon steel, or the peripheral speed is greater than 30 m / sec when the overloaded application of cast or forged. Flange coupling on the two axes of the neutral high when the two-axis relative displacement exists, it will cause additional load in parts, so that the deterioration of working conditions, which is its main disadvantage. However, due to the simple structure, low cost, large torque can be passed, so the low speed, the impact of the shaft rigidity.