Disassembly and assembly method of plum coupling

　　When disassembling the torx coupling, the connecting bolt is usually disassembled first.Because there is a layer of grease, corrosion products and other deposits on the surface of the thread, it is very difficult to disassemble the bolt, especially for the bolt with severe rust.The disassembly of connecting bolts must choose suitable tools, because the stress surface of the bolt's outer hexagon or inner hexagon has slipped and damaged, and the disassembly will be more difficult.For bolts that have been corroded or have more grease stains, solvents (such as rust inhibitors) are often used to spray the connection between the bolt and the nut so that the solvent can penetrate into the thread, which will be easy to disassemble.If the bolt cannot be removed, heating can be used. The heating temperature is generally controlled below 200°C. Through heating, the gap between the nut and the bolt will increase, which will easily rust and fall off, making it easier to remove the bolt.If the above methods cannot be used, only the bolts are destroyed, the bolts are cut or drilled, and new bolts are replaced during assembly.The new bolt must conform to the original bolt specification.The bolts used to replace the couplings of the high-speed equipment must be weighed so that the new bolts have the same weight as the connecting bolts on the same set of flanges.Due to the failure of the plum blossom itself, it needs to be disassembled.First, check the entire coupling (especially the damaged coupling) carefully to find out the cause of the failure.

　　Before removing the connecting rod coupling, it is necessary to mark the positions where the parts of the connecting rod coupling fit each other for reference when reloading.For couplings used in high-speed machinery, the weight and markings of the joint bolts must be clear.

　　The cleaning, cleaning and quality evaluation of the plum blossom coupling after disassembly is a very important task after the disassembly of the plum blossom coupling.Part evaluation refers to comparing the existing conditions of its size, shape and material properties with the quality standards determined by the part design after each part is put into use to determine which parts can continue to be used.Which parts should be repaired and used, and which should be scrapped and updated.

　　In the process of disassembling the plum coupling, the most difficult task is to remove the hub from the shaft.The hub used for key connection is usually centered on four horses or four horses. The selected horse should match the shape and size of the hub.The right-angle hooks of each leg of the horse should be properly combined with the rear side of the hub so that no imagination is created when force is applied.This method is only suitable for wheels with little interference.For hubs with large interference, heating is often used, or hydraulic jacks are used at the same time.

　　Due to the existence of the Xingmeihua coupling, the vibration of the shafting is intensified, and many professional and technical personnel have conducted research on it.Due to the existence of the star plum coupling, the vibration of the shaft system has increased, and many professional and technical personnel have conducted research on it.Vibration analysis is one of the techniques for predicting coupling misalignment.The gradual change trend of the equipment status can be judged.But when judging whether the device is in an inaccurate state, a lot of data and examples are needed for reference.It also needs to distinguish between bearings, lubricants, couplings or fixed connections, so there are certain limitations.Infrared photography can identify overheated parts such as bearings, motor housings, and couplings when the equipment is not good, and determine the alignment errors of the couplings.Combined with prediction technologies such as vibration analysis, the effect is good.

　　The torsional vibration of the gear coupling is analyzed and researched.The Fourier series method is used to analyze the torsional vibration of the gear coupling.A large number of experiments were carried out on the axial vibration of the gear coupling system, and the main reasons for the axial vibration were qualitatively explained. It was pointed out that the axial vibration was mainly caused by the friction of the tooth surface not neutralizing.When there is no axial restoring force or thrust bearing, large axial movement occurs.This article briefly explains the bending vibration caused by gear coupling through experiments on steam turbines and fans.According to the uneven measurement of the gear coupling, lubrication conditions, clearance, error and load and other parameters, the bending vibration test of the gear coupling was carried out.In addition, Shannei and Dyegu et al. performed a nonlinear analysis on the bending vibration of a semi-coupled system under dry friction.It is pointed out that the vibration of gear coupling is mainly related to the non-neutral friction of internal and external gears.In the case of high-speed rotation, special attention should be paid to the lubrication of the tooth surface.

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