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The structure, installation and maintenance of SL cross slide coupling

Publication time: November 2016, 06【L Small

    Advantages of SL Oldham Coupling: It consists of two half couplings with grooves on the end faces and a middle disc with convex teeth on both sides.Because the convex teeth can slide in the groove, the relative displacement between the two shafts during installation and operation can be compensated.The material of this coupling part can be 45 steel, and the working surface needs to be heat treated to increase its hardness. The flange coupling is a rigid coupling, which uses ordinary flat keys to separate two flanged half couplings. Connect with the two shafts, and then use bolts to connect the two half couplings into one body to transmit movement and torque.

  The SL cross slider coupling has two main structural forms:

  ①The reaming hole uses bolts to realize the two-axis centering and the bolt rod to bear the extrusion and shear to transmit the torque.

  ②It is centered by matching the convex shoulder on one half coupling with the groove on the other half coupling.The bolts connecting the two half-couplings can be ordinary bolts A and B, and the torque is transmitted by the frictional moment of the joint surface of the two half-couplings.

  The material of the SL cross slider coupling parts can be 45 steel, and the working surface needs to be heat treated to increase its hardness; Q275 steel can also be used when the requirements are lower, without heat treatment.In order to reduce friction and wear, oil should be injected from the oil hole of the middle plate for lubrication during use.Because the half-coupling and the intermediate disc form a moving pair and cannot rotate relative to each other, the angular velocity of the driving shaft and the driven shaft should be equal.However, when working with relative displacement between the two shafts, the middle disk will generate a large centrifugal force, which will increase the dynamic load and wear.Therefore, pay attention to the working speed not greater than the specified value when selecting.This kind of coupling is generally used at a rotation speed n<250r/min, where the shaft stiffness is relatively large and there is no severe impact.Steel has good wear resistance, that is, the ability to resist wear.The steel rigid coupling can maintain its shape and size under the condition of considerable pressure and friction.Due to the different working conditions of various couplings, steel couplings also have some other properties, such as high temperature mechanical properties, thermal fatigue properties, thermal conductivity and corrosion resistance.

Keywords of this article:SL cross slider coupling, coupling |