Couplings are widely used in shaft transmission of various mechanical devices, such as water pumps (especially high-power, chemical pumps), fans, compressors, hydraulic machinery, petroleum machinery, printing machinery, textile machinery, chemical machinery, mining machinery, Metallurgical machinery, aviation (helicopter), naval high-speed power transmission systems, steam turbines, piston-type power mechanical transmission systems, crawler vehicles, and generator sets high-speed and high-power mechanical transmission systems, which are applied to high-speed transmission shafts after dynamic balance Has become more common. In the process of coupling disassembly, the most difficult task is to remove the hub from the shaft.

The diaphragm coupling consists of at least one diaphragm and two shaft sleeves. The diaphragm is fastened to the shaft sleeve with a pin and generally does not loosen or cause backlash between the diaphragm and the shaft sleeve. The coupling factory usually uses a three-legged puller or a four-legged puller for disassembly of the keyed hub. The selected puller should match the outer dimensions of the coupling of the hub, and the right-angle hooks of each leg of the puller should be properly combined with the rear side of the hub, so that no imagination of slippage will occur when force is applied. This method is only used for disassembly of hubs with relatively small interference. For hubs with relatively large interference, heating methods are often used, or at the same time with a hydraulic jack for disassembly. When removing the coupling, the connecting bolt is usually removed first. Because a layer of grease, corrosion products and other deposits are deposited on the thread surface, the bolts are not easy to disassemble, especially for the bolts with serious corrosion.

The disassembly of the connecting bolts must be done with suitable tools, because the bearing surface of the bolt's outer hexagon or inner hexagon has been slipped and damaged, and the disassembly will be more difficult. For bolts that have been rusted or have a lot of grease stains, solvents (such as rust loosener) are often used to spray the joints between the bolts and the nuts, so that the solvent can penetrate into the threads, which will be easy to disassemble. Couplings are now receiving more and more attention from customers. Compared with gear couplings, diaphragm couplings have the characteristics of good elasticity, low noise, no lubrication, and easy maintenance. It has received more and more praise, especially in the field of precision transmission, basically using diaphragm couplings. In the developed countries in the world, the use of diaphragm couplings has become very common. In practice, more double diaphragm couplings are used, mainly because the double diaphragm can effectively compensate for the large deviation between the two shafts. Shift, the coupling diaphragm is selected high-quality imported stainless steel material, the product has the characteristics of sophisticated technology, good coupling quality and long service life.

Before installing the diaphragm coupling, clean the end faces of the two shafts and check the fit of the key notches on the end faces. After installation, all screws must be checked for normal operation. If loose, they must be tightened. Repeat this for several shifts to ensure It will loosen; during work and operation, you should always check whether the diaphragm coupling is abnormal. If any abnormality occurs, it must be repaired. In order to prevent the fretting wear of the diaphragm at high speed, the diaphragm bolt hole appears For damage caused by microcracks, solid lubricants such as molybdenum disulfide can be applied between the diaphragms or the surface of the diaphragms can be treated with anti-friction coatings. Appropriate safety precautions must be taken at various sites where human and equipment accidents may be caused by the operating diaphragm coupling. The coupling diaphragm is composed of several groups of diaphragms that are alternately connected with the two halves of the coupling with bolts. Each group of diaphragms is composed of several stacked ones. The diaphragms are divided into connecting rod type and different shape of the whole piece type.