Disassembly of the coupling

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    CouplingThe process of disassembly and assembly is the opposite, and the purpose of the two is different.The assembly process is to connect the coupling according to the assembly requirements

    The coupling is assembled so that the coupling can reliably transmit torque.Disassembly is generally due to equipment failure or connection

    The shaft itself needs to be repaired, and the coupling is disassembled into parts.The degree of disassembly is generally determined according to the maintenance requirements

    , Some only require the two shafts to be connected to be disconnected, and some not only need to disassemble all the couplings, but also to disassemble the hub

    Remove it from the shaft.There are many types of couplings, with different structures, and the disassembly process of the coupling is also different.

    , This article mainly introduces some problems that need to be paid attention to in the disassembly work.
    Because the coupling itself needs to be disassembled due to the failure of the coupling itself, the entire coupling must be carefully and carefully inspected (especially

    For couplings that have been damaged), the cause of the failure should be ascertained.
    Before disassembling the coupling, it is necessary to make some marks on the positions of the coupling parts for repetition.

    Reference when installing.For couplings used in high-speed machines, the connecting bolts must be weighed, and the markings must be clear,
    When disassembling the coupling, generally disassemble the connecting bolt first.Due to the deposit of a layer of grease, corrosion products on the thread surface and its

    Its deposits make the bolts difficult to disassemble, especially for heavily corroded bolts, it is very difficult to disassemble.Connection

    The bolt must be disassembled with suitable tools, because the bearing surface of the bolt's outer hexagon or inner hexagon has slipped

    Damaged, disassembly will be more difficult.For bolts that have been rusted or have a lot of grease stains, solvents (such as loose

    Rust agent) Spray the joint between the bolt and the nut to allow the solvent to penetrate into the thread, so that it will be easy to disassemble.like

    If the bolts cannot be removed, the heating method can be used, and the heating temperature is generally controlled below 200°C.pass

    Heating increases the gap between the nut and the bolt, and the rust is also easy to fall off, making it easy to disassemble the bolt

    some.If none of the above methods work, only damage the bolts, cut or drill the bolts, and change them when assembling.

    Replace with new bolts.The new bolts must be consistent with the original bolt specifications, used for high-speed equipment couplings.

    The replaced bolts must be weighed so that the new bolts have the same weight as the connecting bolts on the same set of flanges.
    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

    Generally use a three-legged puller or a four-legged puller for disassembly.The selected puller should match the outer dimension of the wheel hub.

    The right-angle hooks of each horse's feet should be properly combined with the rear side of the wheel hub, so that the imagination of slippage will not occur when exerting force.This

    This method is only used for the disassembly of hubs with relatively small interference. For hubs with large interference, heating is often used.

    Method, or at the same time with a hydraulic jack for disassembly.
    Cleaning, cleaning and quality assessment of all parts of the coupling is extremely important after the coupling is disassembled.

    work.The evaluation of components refers to the actual size, shape and material properties of each component after operation.

    Some conditions are compared with the quality standards determined by the parts design to determine which parts can continue to be used,

    Which parts should be used after repair, and which ones should be scrapped and updated.

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