When selecting the type of universal coupling，A number of factors need to be considered to ensure that the selected coupling can meet the needs of the actual working conditions，And ensure the stability of mechanical equipment、Efficient operation。The following are the main factors that should be considered when choosing the type of universal coupling：

1. The size and nature of the transferred load

• Torque size and properties：The rated torque of the coupling is determined according to the working conditions of the transmission system，To ensure that it can deliver the desired torque。For high-power heavy-duty transmission，The coupling type with strong load bearing capacity should be selected，Such as heavy cross shaft type universal coupling。

• Cushioning and damping function：If the transmission system has special requirements for damping，Couplings with corresponding functions should be selected，Couplings with high elasticity, such as tire couplings。

2. Working speed

• Speed level：High speed transmission shaft should choose the coupling with high balance accuracy，To reduce vibration and noise，Improve transmission stability。Such as，Diaphragm couplings perform well in high-speed drives。

• Speed correction factor：According to the couplings actual speed and rated speed ratio，Calculation of speed correction factor，To correct errors in torque calculations。

3. Installation accuracy and displacement compensation

• Installation accuracy：The installation accuracy of the connected parts directly affects the service life and transmission efficiency of the coupling。therefore，When choosing a coupling，The requirements for installation accuracy need to be considered。

• Displacement compensation：When there is a relative displacement between two axes，The coupling with displacement compensation capability should be selected，Such as flexible coupling。Universal coupling because it can compensate the Angle between the two axes and axial displacement，Therefore, it is often used in transmission systems with relative displacement。

4. Working environment and temperature

• Working environment：Couplings often operate under different environmental conditions，moistness、hyperthermia、hypothermy、etch。The working environment and its requirements need to be considered in the selection，Ensure that the coupling has appropriate corrosion resistance、wear-resistant、High temperature resistance、Low temperature resistance and other properties。

• Temperature effect：Couplings containing non-metallic components such as rubber are more sensitive to temperature，And easy to age。Transmission systems that operate in high or low temperature environments，High temperature or low temperature resistant coupling materials should be selected。

5. Reliability and life

• reliability：The reliability of the coupling is crucial to the stability of the operation of the mechanical equipment。The manufacturing process of the coupling needs to be considered in the selection、Factors such as material selection and service life，Ensure the selected coupling has a high reliability。

• Bearing life correction factor：According to the actual use of the coupling and bearing life requirements，Calculation of bearing life correction factor，To adjust the coupling selection results。

6. Adaptability and economy

• suitability：When choosing a coupling，It needs to consider its compatibility with the power engine and the working machine，Make sure the coupling is sized、torque、Shaft diameter、Shaft hole and other parameters and prime mover、Work machine matching。

• economy：Under the premise of meeting the requirements of use，Consider the cost-effectiveness of the coupling，Choose the coupling type that is cost-effective。

To sum up，When selecting the type of universal coupling, the size and nature of the transmitted load should be considered comprehensively、Working speed、Installation accuracy and displacement compensation、Working environment and temperature、Reliability and longevity, as well as adaptability and economics。These factors are evaluated comprehensively，The type of universal coupling most suitable for actual working conditions can be selected。