Cross-shaft universal coupling is a kind of universal transmission basic parts, its main feature is that it can connect two transmission shafts which are not in the same axis, and can reliably transfer the data and motion. The coupling has the advantages of high load capacity, long service life, smooth operation, no noise, large axial compensation, simple maintenance and so on. Here for you to explain the selection conditions of the universal coupling.
Before selecting a universal coupling, the prerequisites and conditions must be clear:
From the prime mover to the universal coupling between the transmission or not.
If so, what is the transmission ratio and how many shafts are output after passing through the intermediate drive, i.e. whether there is a power shunt. Consider the type, power and speed of the prime mover.
It is necessary to take into account the type of prime mover and the type of load to be transferred by the optional cross-shaft universal coupling: unidirectional constant load, pulsating load or bi-directional alternating load.
How the universal coupling is installed. Horizontal, vertical or inclined installation.
If possible, make sure that the angle of folding of the shaft is less than 3 degrees, and if it has to be mounted at an angle, determine what the horizontal and vertical angles are.
Considering the working environment of the prime mover, whether there is high temperature, dust, water, chemical corrosion and other harsh environmental conditions, according to the different environments to choose the appropriate type of universal coupling.
Need to know the universal coupling at both ends of the requirements of the coupling form and specific installation dimensions, as well as to understand whether there is a mounting bracket and other special requirements.
What is the rotational speed of the cross shaft type universal coupling itself.
Whether dynamic balancing is required. If dynamic balancing is required, what level of balancing quality is required.
Is there any restriction on the mounting position?
What is the specific installation length, and does it need to be telescoped?
If expansion is required, what is the outward extension of the universal coupling in the short condition?
For universal couplings that do not require expansion, compensation of axial dimensional errors must be considered, and the location in the system where the compensation is to be made should be determined.
By understanding the above prerequisites, the specifications of the cardan shaft are determined step by step, and then the choice of the structural form is determined.
The structural form of universal coupling has cross shaft type, ball cage type, ball and fork type, bump type, ball pin type, ball hinged type, ball hinged plunger type, three-pin type, three-forked rod type, three ball pin type, hinged rod type, etc., commonly used for the cross-axis type, followed by the ball cage dragon, according to the size of the torque transferred in the actual application is divided into heavy, medium, light and small.
To choose a suitable coupling for the prime mover from so many universal couplings requires a deep understanding of the above prerequisites and external influences.
The above content is provided by Propshaftiger.