Characteristics and maintenance methods of drum gear coupling

The drum gear coupling has the ability to compensate for axis deviations in the radial, axial and angular directions. It has the advantages of compact structure, small gyration radius, large load-bearing capacity, good transmission speed, low noise and long maintenance cycle.When the drum gear coupling is working, therefore, the gear coupling needs to work in a good and sealed state.

The drum gear coupling is suitable for low-speed and heavy-duty working conditions, such as metallurgy, mining, lifting and transportation industries, and also suitable for shafting transmission of various machinery such as petroleum, chemical industry and general machinery.

The characteristics of the drum gear coupling (compared with the straight gear coupling, it has the following characteristics):

15. Carrying.Under the same outer diameter of the inner gear sleeve and larger outer diameter of the coupling, the carrying capacity of the drum gear coupling is on average 20-XNUMX% higher than that of the straight gear coupling;

50. Large amount of angular displacement compensation.When the radial displacement is equal to zero, the allowable angular displacement of the drum gear coupling is increased by XNUMX%. Under the same modulus, number of teeth, and tooth width, the allowable angular displacement of the drum gear is greater than that of a straight tooth;

XNUMX. Based on the characteristics of warp, drum gears have generally been used instead of straight gear couplings;

XNUMX. The drum-shaped tooth surface improves the contact conditions of the inner and outer teeth, avoids the disadvantages of squeezing the edge of the straight tooth and stress concentration under the condition of angular displacement, and at the same time improves the friction and wear of the tooth surface, and reduces the noise. , Long maintenance period;

XNUMX. The tooth end of the outer gear sleeve is in the shape of a horn, which makes the assembly and disassembly of the inner and outer gears convenient;

Drum-shaped gear couplings have small radial dimensions and large load-bearing capacity. They are often used for shafting transmissions under low-speed and heavy-duty conditions. The dynamically balanced gear couplings can be used for high-speed transmissions, such as gas turbine shafting. transmission.Because the angular compensation of drum-shaped gear couplings is greater than that of straight-tooth couplings, drum-shaped gear couplings are commonly used.Drum gear couplings belong to rigid-flexible couplings.

The drum gear coupling is one of the basic parts of the machinery industry. It is mostly used in the transmission of heavy loads, high speed requirements, and large adjustment errors and deviation angles of the two coupling shafts.The gear teeth of its external gear sleeve are arc-shaped along the length direction, while the gear teeth are in a drum shape when viewed from the top of the tooth, that is, on the same tangent plane parallel to the axis, the tooth thickness gradually changes from the middle of the tooth length to the two ends. The tooth profile of the inner ring gear meshing with the outer gear sleeve is linear.Because the tooth top surface and tooth flank of this kind of external gear sleeve are both arc-shaped (which is different from the characteristics of ordinary gear couplings), the entire coupling becomes a double joint and is flexible.Due to its structure, the drum gear coupling has the following characteristics: ① It can compensate the deviation of angular installation and radial installation due to the non-coincidence of the two coupling axes, and it can be driven in the horizontal direction or Under the special structure, vertical transmission, ②compact structure, low weight and moment of inertia, ③because all parts are circular, so the unbalanced moment is small.

Maintenance method of drum gear coupling:

XNUMX. The indirect tube or other parts in the reassembly should be assembled according to the original markings and data.

XNUMX. Tighten the bolts evenly with a torque wrench.

50. Check the tooth surface meshing of the drum-shaped gear coupling. The contact area along the tooth height is not less than 70%, and the tooth width is not less than XNUMX%. The tooth surface must not be severely corroded, worn or cracked.

0.03. Drum gear coupling outer gear ring full circle runout is not more than 0.02mm, end circle runout is not more than XNUMXmm.

200. If you need to remove the gear ring, use tools and don't knock, so as to avoid bending or damage to the shaft.When reinstalling, heat the ring gear to about 0.01°C before installing it on the shaft.The interference between the outer gear ring and the shaft is generally 0.03~XNUMXmm.