When selecting a standard slurry pump coupling or designing a special slurry pump coupling, it is first necessary to understand the actual torque that needs to be transmitted by the slurry pump coupling. For standard slurry pump couplings, the permissible torque values for each model have already been determined. Therefore, when sizing, the actual torque that needs to be transmitted by the slurry pump coupling is less than that of the selected slurry pump coupling. Allowable torque [t] The actual torque that needs to be transmitted by the slurry pump coupling is usually calculated as torque t0. It is equal to the theoretical torque t of the slurry pump coupling multiplied by the condition coefficient k. Therefore, the above condition can be expressed as: t0=kt.
The working condition coefficient is the influence coefficient of the load change and working environment of the transmission shaft system on the actual transmission torque of the slurry pump coupling. Usually, its value is related to the type of power machine and working machine, working conditions, moment of inertia of the transmission shaft system, etc., and is also affected by the structure of the slurry pump coupling itself. Therefore, if the same slurry pump coupling is used in different transmissions, or different slurry pump couplings are used in the same transmission, the working condition coefficient values are not necessarily the same, and the data recommended by general data are only approximate values. For important driveshaft systems, this coefficient is best obtained precisely by calculating the dynamic characteristics of the driveshaft system or by measuring the maximum torque during operation. For general drive shaft systems, this coefficient can be referred to the operating experience or test data under similar transmission conditions. Since this kind of data is obtained from actual experience under certain conditions, and ** is different, the data are not completely consistent.
It should be pointed out that it should not be considered that a higher transmission performance and working reliability can be obtained by selecting a larger working condition coefficient and using a larger size slurry pump coupling. In fact, when the size and weight of the slurry pump coupling increase, the two shafts connected by the slurry pump coupling and the load they bear also increase. If the relative displacement of the two shafts remains constant, increasing the size of the slurry pump coupling will inevitably lead to an increase in the additional dynamic load. So there may not necessarily be a good outcome. For the transmission shaft system that bears variable load, the weight of the slurry pump coupling directly affects the dynamic characteristics of the slurry pump coupling. For shafting systems that are subjected to unexpected shock loads, it is best to use a smaller safety slurry pump coupling.