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Classification And Application Of Couplings

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What is a coupling?

Coupling refers to a device that connects two shafts or shafts and rotating parts, rotating together in the process of transmitting movement and power, and does not come off under normal circumstances. Sometimes it is also used as a safety device to prevent the connected parts from bearing excessive loads and play the role of overload protection.

Types Of Coupling

gear coupling

Gear couplings utilize the meshing of gears to transmit torque and rotational motion. They have the characteristics of high transmission efficiency and good stability, and are often used in situations where large torque is transmitted, such as machine tools, generator sets, etc.


sleeve coupling

Sleeve couplings are simply hollow cylinders or pipes. They are manufactured with the diameter of the shaft in mind to ensure the shaft fits well in the sleeve. The driven and drive shafts are inserted into each side of the housing. They then have holes that hold them securely together so that they rotate as a unit to transfer torque.Sleeve couplings are mainly used where the shaft does not require any alignment. Additionally, the load capacity should be light to medium duty.

Split sleeve coupling

与由单件制成的套筒联轴器不同,它由两个剖分的圆柱形轴环组成,每个轴环都有一个半圆形切口。这种设计使轴环可以轻松安装在轴上,然后通过螺栓或其他连接件紧紧地固定在一起。它们可以在不改变轴的位置的情况下方便地组装或拆卸。开口套筒联轴器广泛应用于各种工业领域,特别适用于高速旋转设备、压缩机、泵和发电机组等。

Flange coupling

This is another easy-to-make coupling that works similarly to a sleeve coupling. However, it has flanges on both ends of both sleeves. The flange has threaded holes for bolt connections. There is also a critical section on the shaft and hub to prevent slipping. To ensure that the hub does not slide back, it requires the use of a conical key.


Flexible coupling

Elastomeric couplings use elastic elements, such as springs or rubber, to dampen and absorb vibration while transmitting torque and motion. They can effectively reduce shock and vibration between shafts, protect equipment and reduce noise. Flexible couplings are commonly used in automobiles, pumps and wind turbines.

universal joint coupling

Universal joint couplings allow the shaft to transmit torque at different angles and have a large tolerance for misalignment. They are commonly used in equipment that requires the connection of non-aligned shafts, such as marine drivetrains and industrial machinery.


Hydraulic Coupler

This is a coupling that uses fluid power to transmit torque and motion. It consists of a pump wheel, a turbine, and guide vanes. As the pump impeller rotates, it draws the working medium (usually oil or water) into the coupling and pushes it to the turbine. The turbine then begins to rotate, transmitting torque to the output shaft. In this process, there is no actual physical contact, so the fluid coupling has good shock absorption, noise reduction and equipment protection functions.This type of coupling is mainly used in rail transit and marine applications where controlled starting of the transmission is crucial.

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