Do you know anything about coupling? Today we'll talk about the characteristics and classification of coupling. Coupling is an important component that connects the engine and various mechanical equipment. Its function is to transmit power and torque while protecting the correct alignment between the two shafts.
Coupling can be divided into many categories based on material and structure. Among them, rigid coupling is a common type. Rigid coupling can be divided into fixed and movable types. Fixed coupling refers to a coupling that can be replaced without disassembly, which is suitable for occasions where maintenance is carried out during machine shutdown. Movable coupling can be adjusted by moving the coupling to achieve relative movement between the two shafts, which is suitable for occasions where high alignment requirements are required during operation.
The feature of rigid coupling is simple structure and low cost, but when the alignment between the two shafts is poor, the working condition of the coupling will deteriorate, and additional loads will be generated, which will also affect the machine, such as machine vibration, bearing overheating and wear. To reduce the influence of axial bending on the coupling, it should be as close to the bearing as possible.
Specifically, the allowable relative displacement of the two shafts connected by rigid fixed coupling is very small, and the alignment of the two shafts must be accurate. The allowable relative radial displacement is generally not more than 0.05mm. Permissible relative angular displacement should not exceed 0.05mm over a length of one meter.
In addition to rigid coupling, safety coupling is also a common transmission component product. Safety coupling is a device that, when the torque transmitted exceeds the specified value, the connecting member is broken, separated, or slips, causing the transmission to be interrupted or limiting the transmission of torque to protect the important machine parts from damage.
After that, there is also a special type of coupling, a coupling that is directly connected by non-mechanical means, such as a coupling using hydraulic transmission, pneumatic transmission, or electromagnetic operation. These types of couplings have more advanced technology, but they are not widely used in mechanical equipment at present.
In summary, coupling is a broad range of transmission component products, with many types, and there is no established standard classification method as of yet. I hope today's introduction will be helpful to everyone.
