Couplings are important mechanical components that connect two shafts or shafts and rotating parts in the industrial field. They are mainly used to transmit torque, compensate for axial/radial/angular deviations, reduce vibration or achieve safety protection. They have a wide range of application scenarios.

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Energy and power industry

• Wind power generation: connecting the gearbox and the generator, bearing dynamic loads and compensating for the deviation caused by the swing of the wind wheel (such as diaphragm couplings, universal couplings).

• Thermal power/hydropower: used for the shaft connection of steam turbines, water turbines and generators, requiring high temperature and high torque resistance (such as gear couplings, rigid couplings).

• Nuclear power: transmitting power between pumps, motors and drive devices, requiring high reliability and seismic resistance.

Heavy industry and metallurgy

• Steel smelting: connecting motors and rollers in rolling mills and continuous casting machines, bearing impact loads and thermal deformation (such as drum gear couplings and cross-shaft universal couplings).

• Mining machinery: power transmission of crushers and ball mills, requiring vibration resistance and wear resistance (such as tire couplings).

Petroleum and Chemicals

• Centrifugal compressors/pumps: Compensate for installation errors and reduce vibration in high-speed rotating equipment (such as diaphragm couplings).

• Pipeline transportation: Compensate for thermal expansion or foundation settlement in long shaft systems (such as slider couplings).

General industrial equipment

• Large fans/water pumps: reduce shaft vibration during start-up and shutdown (such as elastic pin coupling).

• Papermaking/cement machinery: compensate for installation deviation in long-distance transmission (such as chain coupling).

Key factors for selection

• Torque and speed: Gear couplings are required for high torque scenarios (such as rolling mills), and diaphragm couplings are required for high speed scenarios (such as centrifuges).

• Deviation compensation capability: Universal couplings are selected for large angular/radial deviations, and slider couplings are selected for axial displacement.

• Environmental requirements: Stainless steel is used for corrosive environments, and heat-resistant alloys are selected for high temperature environments.

• Maintenance requirements: Elastic couplings require regular replacement of components, and diaphragm couplings are maintenance-free.

Type examples

• Diaphragm coupling: high precision, lubrication-free (suitable for compressors and pumps).

• Drum gear coupling: large torque, allowable deviation (metallurgical machinery).

• Tire coupling: high elasticity, vibration reduction (ships, mines).

  
  

Therefore, the correct selection of coupling directly affects the life and operating efficiency of the equipment, and requires a comprehensive evaluation based on operating conditions, costs and maintenance conditions.