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    Coupling disassembly and application of diaphragm coupling

    Source: Cangzhou Ever-Power Coupling Co., Ltd.发布时间:2018-01-17 11:11:04

     Before disassembling the coupling, make some marks on the coordinated positions of the various parts of the coupling for reference when reassembling.For couplings used in high-speed couplings, the coupling bolts are weighed, and the transmission accuracy of the coupling must be clearly marked and cannot be mistaken.
      When disassembling the diaphragm coupling, generally disassemble the connecting bolt first, and the working environment.Because a layer of grease, corrosion products and other deposits are deposited on the surface of the thread, the bolt is not easy to disassemble, especially for the heavily corroded bolt, it is very difficult to disassemble.The disassembly of 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 with a lot of grease stains, solvents (such as rust loosening agents) are often used to spray the joints between the bolts and the nuts, so that the solvent can penetrate into the threads, so that it will be easy to disassemble.If the bolts cannot be removed, the heating method can be used, and the heating temperature is generally controlled below 200°C.By heating, the gap between the nut and the bolt is enlarged, the rust is also easy to fall off, and the bolt disassembly becomes easier.If none of the above methods work, only damage the bolts, cut or drill the bolts, and replace them with new bolts when assembling.The new bolts must be consistent with the original bolt specifications. The newly replaced bolts used for high-speed equipment couplings must also be weighed so that the new bolts have the same weight as the coupling bolts on the same set of flanges. The coupling should be selected. Factors to consider.
      In the process of coupling disassembly, the most difficult task is to remove the hub from the shaft.For the hub of the coupling, a three-legged puller or a four-legged puller is generally used for disassembly.The selected puller should match the outer dimensions of the hub, and the right-angle hooks of each foot of the puller should be properly combined with the rear side of the hub, so that no slippage will occur when you apply force.This method is only used for the disassembly of hubs with relatively small interference. For hubs with relatively large interference, heating methods are often used, or at the same time with hydraulic jacks for disassembly, drum-shaped gear couplings.
      Cleaning, cleaning and quality assessment of all parts of the coupling is an extremely important task after the coupling is disassembled.The evaluation of components refers to comparing the existing conditions of the size, shape, and material properties of each component with the quality standards determined by the component design to determine which components can continue to be used and which components should be used. After repairing, which parts belong to the parts that should be scrapped and updated.
      The diaphragm coupling compensates for the relative displacement of the two shafts connected by the elastic deformation of the diaphragm. It is a high-performance flexible coupling with metal elastic elements. It does not require lubrication, has a compact structure, high strength and long service life. No rotation gap, not affected by temperature and oil pollution, acid, alkali and corrosion resistance, suitable for high temperature, high speed, and corrosive medium shafting transmission, widely used in shaft transmission of various mechanical devices .
      The diaphragm coupling is composed of at least one diaphragm and two shaft sleeves.The diaphragm is fastened to the sleeve with a pin and generally will not loosen or cause backlash between the diaphragm and the sleeve.Some manufacturers provide two diaphragms, and some provide three diaphragms, with one or two rigid elements in the middle, and the two sides are connected to the shaft sleeve.The difference between the single diaphragm coupling and the double diaphragm coupling is the ability to handle various deviations. In view of the complex bending of the diaphragm, the single diaphragm coupling is not suitable for eccentricity.The double diaphragm coupling can bend in different directions at the same time to compensate for eccentricity.
      Diaphragm couplings are widely used in shaft transmission of various mechanical devices, such as water pumps (especially high-power and 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, high-power mechanical transmission systems, which are applied to high-speed transmission after dynamic balance Shafting has become more common.

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