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What factors should be considered when choosing a coupling
Different mechanical equipment has different requirements for transmission, so there are many product types and specifications provided by coupling manufacturers. Different couplings have their own characteristics and scope of application. You must choose correspondingly according to the situation, then choose the coupling What are the factors to consider?
Whether the coupling is appropriate or not will directly affect a series of problems such as the operation of the mechanical equipment, vibration, and noise. Therefore, the selection of the coupling must take into account many factors:
Mechanical characteristics of power machine:
The mechanical characteristics of the power machine have a certain influence on the entire transmission system. For different types of power machines, due to their different mechanical characteristics, the corresponding power machine coefficient KW should be selected, and the best coupling suitable for the system should be selected.The type of power machine is the basic factor to choose the type of coupling.The power of the power machine is one of the main basis for determining the size of the coupling, and it is proportional to the torque of the coupling.
Load category:
Due to different equipment structures and materials, the couplings used in the transmission systems of various mechanical products have very different load-bearing capacities.The load category is mainly for the impact, vibration, forward and reverse rotation, braking, frequent start and other reasons of the working load of the working machine to form different types of loads.For low-speed and heavy-load conditions, avoid selecting couplings that are only suitable for small and medium power. For shafting systems with large load changes and impacts and vibrations, flexible couplings with elastic elements and better cushioning and damping effects should be selected. .
Permissible speed of coupling:
The allowable speed range of the coupling is determined by calculation according to the maximum outer edge size of the allowable linear speed of different materials of the coupling.The allowable speed range of couplings of different materials, varieties and specifications is different. Changing the material of the coupling can increase the allowable speed range of the coupling. The allowable speed for steel is greater than the allowable speed for cast iron.
Transmission accuracy of coupling:
The small torque and the transmission of the main shaft system require the coupling to have high transmission accuracy, and the flexible coupling with metal elastic elements should be used.The shafting transmission with large torque and power transmission also has requirements for transmission accuracy. At high speeds, avoid the use of flexible couplings with non-metallic elastic components and gaps between the flexible couplings and movable components. It is better to choose Diaphragm coupling with high transmission accuracy.
Coupling size, installation and maintenance:
The outer dimensions of the coupling, that is, the maximum radial and axial dimensions, must be within the installation space allowed by the machine and equipment.Choose a coupling that is convenient for assembly and disassembly, does not require maintenance, has a long maintenance period or is convenient for maintenance, replaces wearing parts without moving the two shafts, and is easy to adjust the coupling.for reference only.
Whether the coupling is appropriate or not will directly affect a series of problems such as the operation of the mechanical equipment, vibration, and noise. Therefore, the selection of the coupling must take into account many factors:
Mechanical characteristics of power machine:
The mechanical characteristics of the power machine have a certain influence on the entire transmission system. For different types of power machines, due to their different mechanical characteristics, the corresponding power machine coefficient KW should be selected, and the best coupling suitable for the system should be selected.The type of power machine is the basic factor to choose the type of coupling.The power of the power machine is one of the main basis for determining the size of the coupling, and it is proportional to the torque of the coupling.
Load category:
Due to different equipment structures and materials, the couplings used in the transmission systems of various mechanical products have very different load-bearing capacities.The load category is mainly for the impact, vibration, forward and reverse rotation, braking, frequent start and other reasons of the working load of the working machine to form different types of loads.For low-speed and heavy-load conditions, avoid selecting couplings that are only suitable for small and medium power. For shafting systems with large load changes and impacts and vibrations, flexible couplings with elastic elements and better cushioning and damping effects should be selected. .
Permissible speed of coupling:
The allowable speed range of the coupling is determined by calculation according to the maximum outer edge size of the allowable linear speed of different materials of the coupling.The allowable speed range of couplings of different materials, varieties and specifications is different. Changing the material of the coupling can increase the allowable speed range of the coupling. The allowable speed for steel is greater than the allowable speed for cast iron.
Transmission accuracy of coupling:
The small torque and the transmission of the main shaft system require the coupling to have high transmission accuracy, and the flexible coupling with metal elastic elements should be used.The shafting transmission with large torque and power transmission also has requirements for transmission accuracy. At high speeds, avoid the use of flexible couplings with non-metallic elastic components and gaps between the flexible couplings and movable components. It is better to choose Diaphragm coupling with high transmission accuracy.
Coupling size, installation and maintenance:
The outer dimensions of the coupling, that is, the maximum radial and axial dimensions, must be within the installation space allowed by the machine and equipment.Choose a coupling that is convenient for assembly and disassembly, does not require maintenance, has a long maintenance period or is convenient for maintenance, replaces wearing parts without moving the two shafts, and is easy to adjust the coupling.for reference only.
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