Processing characteristics and installation conditions of gear couplings

Published: 2019-12-16

In the inner gear sleeve andCouplingWith the same outer diameter, the load-bearing capacity of the gear coupling is 16-21% higher than that of the spur coupling on average; when the radial displacement is equal to zero, the allowable angular displacement of the spur coupling is 1°, and the gear coupling The allowable angular displacement of the device is 1°30', which is 51% higher.Under the same modulus, number of teeth and tooth width, the allowable angular displacement of the drum gear is greater than that of the spur gear.Drum gearCouplingThere are generally two processing methods, namely processing method and envelope processing method.

When the gear machine processes the drum gear, the tooth blank only makes a rotary movement, and the hob center makes an arc movement to complete the vertical and horizontal feeding of the tooth blank.This method is often used when the gear hobbing machine is connected with the hob feed mechanism to process the drum gear.Drum gear coupling is rigid and flexibleCoupling, Composed of inner gear ring and outer gear half flange with the same number of teethCouplingcomposition.External teeth are divided into straight teeth and drum teeth.The so-called drum tooth is composed of spherical surfaces.The center of the spherical surface is located on the gear shaft, and the tooth side clearance is greater than that of an ordinary gear.The drum gear coupling has a larger angular displacement relative to the straight gear coupling, which improves the contact condition of the tooth surface, improves the torque transmission capacity, and prolongs the service life.

The contact state along the tooth width during angular displacement.When the gearCouplingDuring operation, the two shafts produce relative angular displacement, and the tooth surfaces of the inner and outer teeth periodically slide each other in the axial direction, which will inevitably lead to tooth surface wear and power consumption.Therefore, the gear coupling needs to work in a good sealing state.The gear coupling has a small radial dimension and a large carrying capacity.Commonly used for low-speed and heavy-duty shafting transmission. , Dynamically balanced gear couplings can be used for high-speed transmission, such as gas turbine shafting transmission.Because the angle compensation of drum-shaped gear couplings is greater than that of straight-tooth couplings, drum-shaped gear couplings are widely used.Straight gear couplings are obsolete products, try not to use them.

gearCouplingIt is composed of inner gear ring and outer gear flange half coupling with the same number of teeth.External teeth are divided into straight teeth and drum teeth.The so-called drum tooth is composed of a spherical surface, the center of the spherical surface is located on the axis of the gear, and the tooth side clearance is larger than that of an ordinary gear.When the gearCouplingDuring operation, the two shafts produce relative angular displacements, and the tooth surfaces of the inner and outer teeth periodically slide each other in the axial direction, which will inevitably lead to tooth surface wear and power consumption.Therefore, the gearCouplingNeed to work in a good sealed state.The gear coupling has a small radial dimension and a large carrying capacity.Commonly used in low-speed and heavy-duty shafting transmission. , Dynamically balanced gear couplings can be used for high-speed transmission, such as gas turbine shafting transmission.

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