When choosing a coupling, we mainly need to consider the speed of the shaft it wants to transmit, the size of the load, the installation accuracy of the two connected components, the smoothness of rotation, and the price of the coupling. We can refer to various coupling characteristics to choose the suitable coupling for ourselves. Below, Snake Spring Coupling Company Shanghai Maidong will teach you how to choose high-quality couplings.

When making specific choices, the following points can be considered:

1、 The magnitude and nature of the torque to be transmitted, as well as the requirements for buffering and damping functions

For example, for high-power heavy-duty transmission, we can choose a toothed coupling; If it is necessary to eliminate shaft torsional vibration transmission for severe impact loads, we can choose high elasticity couplings such as tire type couplings.

2、 The working speed of the coupling and the magnitude of the centrifugal force caused by it

For high-speed transmission shafts, couplings with high balance accuracy, such as diaphragm couplings, should be selected instead of eccentric slider couplings.

3、 Reliability and working environment of couplings

Couplings that are usually made of metal components and do not require lubrication are more reliable; The performance of couplings that require lubrication is easily affected by the degree of lubrication and may contaminate the environment. Couplings containing non-metallic components such as rubber are sensitive to temperature, corrosive media, and strong light, and are prone to aging.

4、 The magnitude and direction of the relative displacement between the two axes

After installation and adjustment, if the precise alignment of the two shafts cannot be achieved, or if there is a significant additional relative displacement between the two shafts during operation, we need to use a flexible coupling. For example, when there is a large radial displacement, we can choose a slider coupling. If there is a large angular displacement or intersecting two axis connection, we can choose a universal joint, etc.

5、 Manufacturing, installation, maintenance, and cost of couplings

On the premise of meeting the performance requirements for easy use, we need to choose couplings that are easy to assemble, disassemble, maintain, and have lower costs. For example, rigid couplings are not only structurally simple, but also easy to assemble and disassemble, and can be used for low-speed and rigid transmission shafts. Basically, non-metallic elastic element couplings, due to their high-quality comprehensive capabilities, can be widely used in medium and low-power transmissions.

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三、联轴器的可靠性和工作环境

通常由金属元件制成的不需润滑的联轴器此较可靠；需要润滑的联轴器，其性能易受润滑完善程度的影响，且可能污染环境。含有橡胶等非金属元件的联轴器对温度、腐蚀性介质及强光等比较敏感，而且容易老化。

四、两轴相对位移的大小和方向

在安装调整之后，无法位置两轴的严格**度对中，或者是在进行工作的时候两轴会产生比较大的附加相对位移时，我们*需要采用挠性联轴器。比如当径向位移较大的时候，我们*可以选择滑块联轴器，如果是角位移较大或者时相交两轴联接可以选择万向联轴器等。

五、联轴器的制造、安装、维护和成本

在我们满足便用的性能前提下，需要去选择使用装拆简单、维护方便并且成本较低的联轴器。比如刚性的联轴器不单单是结构简单，并且装拆起来方便，可以使用于低速还有刚性大的传动轴。基本上的非金属弹性元件联轴器，因为具有优质综合的能力，可以广泛使用在中、小功率的传动。

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