Working principle of diaphragm coupling

The diaphragm coupling is connected with the coupling through the diaphragm, and the diaphragm is embedded in the hole between the half coupling and the jacket to transfer the torque and bear the radial force, which can compensate the angular displacement between the output shaft of the reducer and the shaft of the drum, and its mechanism is similar to the elastic pin tooth coupling. When in use, the semi-coupling is set on the output shaft of deceleration reduction, the coat is connected with the wire rope drum with high strength bolts, and the torque and radial load are transmitted between the semi-coupling and the coat through the spherical roller. Diaphragm coupling has the performance of compensating the relative displacement of two axles. It is compact in structure, light in weight, high in reliability and easy to install. It is used for connecting the mechanism on the crane trolley.

Crane lifting mechanism, reducer output shaft and low speed rotation of the connection between the reel usually adopts gear coupling plate, open gear, gear coupling, with a 3 bearings as the fulcrum of the static fixed shaft or two bearings as the fulcrum of the static fixed shaft. Gear coupling plate is used for small and medium-sized lifting series, compact structure, good grouping, complex shape, processing time, unchanged for large crane; Open gear transmission is used for large crane, used for further deceleration and increase the distance between the motor and the drum, simple structure, gear exposed lubrication inconvenience, tooth surface is easy to wear, gear failure fast, using gear coupling will make the drum axis distance lengthened, structure weight increases; The connection type of statically fixed or super statically fixed shaft needs a long shaft, which can shorten the size of the drum shaft, but it is inconvenient to assemble and disassemble, and the reducer can not be separately assembled and tested.

The castings, forgings, mechanical parts and assembly of couplings shall comply with the relevant provisions of JB/T5000.1-15-1998. The mechanical properties of butterfly spring material are not less than 60SI2Mn, and the hardness of heat treatment is 42-52HRC, and it should conform to the relevant provisions of B and C series load and grade 2 accuracy in GB/T1972-2005. The plane of the friction plate should be smooth, no bubbles, no cracks, no obvious impurities and processing damage defects. The material of the friction plate should have the following mechanical and physical properties: the coefficient of static friction is 0.4-0.5; Bending strength not less than 49N/mm; Brinell hardness 20-50HBW; Wear rate is not greater than 0.25*10; For high speed, in the chain and sprocket teeth coated with disulfide grease; The shaft hole and keyway type and size of the coupling shall be in accordance with GB/T3852-1997; Double row roller chain of coupling adopts GB/T1243-1997; The allowable radial, axial and angular compensation of the coupling is shown in the table. Sprocket friction coupling features: a small amount of damping, buffering and compensation performance. It can protect the motor and other parts. Easy to assemble and disassemble and maintain.