Diaphragm coupling installation and failure problems

　　Coupling is an indispensable part of modern transmission technology. It is the bridge through which the power is transmitted. It can transmit the power (speed and torque) of the prime mover to the driven machine. Its quality directly affects the performance of high-speed rotating machinery. Smooth operation.With the continuous improvement of the machine's rotation speed and transmission accuracy, people have higher and higher requirements for the performance of the coupling.Couplings will inevitably develop in a wide range of fields and at a high level.Now, coupling companies that can seize opportunities, open up the market, and constantly discover new growth points and companies that can produce high-tech couplings are very prosperous, with good profit levels and employee income.Therefore, coupling companies should grasp this trend and continuously improve their overall quality and competitiveness.
　　1. Alignment: Use a dial indicator to detect the runout of the flange end and outer circle of the two halves of the coupling. When the outer circle of the flange is less than 250mm, the runout value should not be greater than 0.05mm; when the outer circle of the flange is greater than 250mm , The jitter value should not be greater than 0.08, the measurement method.
　　2. Before installation, check whether the two shafts of the prime mover and the working machine are concentric, whether there are wrapping paper and scratches on the surfaces of the two shafts, whether there are debris in the inner holes of the two half couplings of the coupling, and whether there is any edge of the inner hole Bruises, if any, the shaft and half coupling should be cleaned up, and the bruises should be treated with a fine file.Then check whether the inner hole diameter and length of the two half couplings are consistent with the diameter and shaft elongation of the prime mover and working machine.In general selection, it is better to make the length of the prime mover and the working machine end half-coupling less than the shaft extension of 10-30mm.
　　3. In order to facilitate the installation, it is better to put the two half couplings in the 120-150 incubator or oil tank for preheating, so that the inner hole size increases and it is easy to install.After installation, ensure that the shaft head cannot protrude from the end face of the half coupling, and it is better to be flush.Detect the distance between the two halves of the coupling: take the average of the readings of 3 to 4 points measured along the two inner sides of the flange of the half coupling, and the sum of the measured dimensions of the extension and the two diaphragm sets, two The error is controlled within the range of 0-0.4mm.
　　The possible accidents of the coupling are: 1. The axis of the coupling is skewed and the coupling does not advance: In order to prevent such accidents, except for the alignment of the axis, the position of the coupling hole and the shaft, and the position of the striker In addition to being correct at the time, it is also important to note that the location of the impact point must be selected, and the second and second hits must be light. After entering a certain distance (about 1/3), the force can be slammed.If it is indeed skewed and cannot be calibrated, pull it out quickly after heating it up again, and don't slam it in again. 2. Other accidents may include: the impact block pulley moves backward due to the improper position, the hoist chain slips down, the fuel is insufficient, the fire alarm, etc., all should be paid attention to in advance and carefully checked during the tool preparation and operation training phase. 3. When precision parts such as bearings and mechanical seals have been installed on the spindle in advance, it is forbidden to hit or hit the coupling forcefully to prevent damage or damage to the precision parts.
　　Because the coupling is hot-assembled under high temperature and stress, it is necessary to fully estimate the possible problems and try to avoid them beforehand. If it happens, you will not panic on the spot and take timely measures to proceed. deal with.First make each operator understand the operation steps, achieve a clear division of labor, and stick to their posts in the event of any accident.Secondly, it is required to calibrate the axis of the coupling to be horizontal or vertical, and to align the position of the coupling hole and the shaft end.Be careful and conscientious when adjusting the position of the striker to ensure that it is correct.