China's
apron feeder coupling industry was formed in the early years of our country. With the rapid development of China's economy, the rapid development of the machinery industry has led to the development of the coupling industry. From the current stage of development, China's coupling industry has formed a complete industrial system. The coupling belongs to the most important basic parts in the machinery industry, and its product level directly affects the product level of the machinery industry. The quality of the coupling will affect the performance of the entire apron feeder, so it is necessary to scientifically and rigorously choose the right coupling.
According to whether the apron feeder coupling has the characteristics of compensation or deformation under the working load, it can be divided into rigid coupling and flexible coupling. Rigid couplings are generally used in places with two axes, high accuracy and no relative displacement during work. For example, flange coupling is generally used for the connection between stable load, low speed and good rigidity, it has a simple structure, easy installation and maintenance replacement and can transmit large torque, but when there is relative displacement between the two axes, it will carry out abnormal work and wear the shaft and bearing. Flexible couplings can be divided into elastic coupling and inelastic coupling according to elastic components, and flexible couplings are usually used for occasions with low accuracy. Both kinds of flexible couplings have the ability to compensate, but the former transmits a small torque, and the latter does not have the ability to buffer shock.
The
apron feeder coupling is installed between the motor shaft and the input shaft of the reducer. It transfers the speed of the motor shaft to the input shaft of the reducer, drives the gear to rotate, changes the output speed through the gear transmission, and then transfers the output speed from the drive shaft to the rear axle, thereby changing the speed. When the common rigid coupling - flange coupling is used in the reducer, the coupling has simple structural characteristics, low cost, low compensation performance, simple loading and unloading and disassembly maintenance, large transmission torque, and constant transmission stability. Because the load is not affected by the impact, the transmission accuracy is high, and the radial, axial and Angle compensation performance is not available, so a dual shaft pair is required. The coupling is equipped in the reducer, the three-phase asynchronous motor of the starting motor (rated power 140kW, speed 2500rmin), when the motor power does not reach the rated power 140kW, the motor cannot drive the reducer spindle to rotate, and the reducer cannot work normally. When the motor power is adjusted to the rated power of 140kW, the reducer works, and after a period of time, the reducer appears strong vibration, large noise and unstable work. The main speed reducer is installed on the drive axle, in order to cooperate with the installation, the base of the reducer is not smooth in operation, resulting in greater vibration of the reducer.
In the event that the base design cannot be improved, the apron feeder coupling features compensation for the relative offset of the two axes and better cushioning for shock and vibration applications. After replacement, the reducer works normally and meets the requirements of process use. At the same time, compared with the flange coupling, the service life is longer, the efficiency is higher, and the economic performance is improved. And the reducer is used in the car, which can meet the requirements of high adaptability to the environment and reduce the probability of failure in the car operation. From the above examples, it can be concluded that the following main factors should be considered in the selection of couplings:
(1) According to the ability of the coupling to transfer the load of two axes, under normal circumstances, under the same load, the elastic coupling is stronger than the rigid coupling. That is, the elastic coupling requires less power under the same working conditions
(2) According to the size of the working speed of the coupling and the relative displacement of the two shafts connected, when the coupling meets other processes, the speed can be selected through the speed, the allowable speed of different couplings is not the same, according to the allowable speed range to select the appropriate coupling, when the accuracy requirements between the two shafts are higher, the coupling with compensation characteristics such as tire coupling should be selected;
(3) According to the working environment selection of
apron feeder coupling, when working, the vibration phenomenon of the machine tool should be selected with better damping capacity of the coupling. When the machine works in a harsh environment or under changing environmental conditions, a coupling with a strong ability to adapt to the environment, such as a flexible block coupling, should be selected.
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