Abstract
Marine from a burning arm for the tail gas emissions set of vessels and equipment, including combustion for the cantilever arm structure. Arm of the existing combustion process, the general marine crane designed by the design of the structure was too conservative, making the quality of the structure Too large. Combustion arm structural safety factor would be too large, not only lead to waste and material cost increases, but also the stability of the entire hull negative. Back-burner arm of the need for specialized design. Combustion arm base paper used a special use Rotary in the rotary bearing.
Rotary support device is nearly 30 years ago to develop a new type of machine components, it has been used excavator and the lifting of hatred to the progressive development of other machinery for. Rotary supporting device near the large rolling bearings. The machine will link the upper and lower to the upper bearing the weight and work load, and the upper to the lower part of the rotation. In this paper, the base of a burning arm bending strength, shear strength and the strength of anti-extrusion check. Combustion arm of the Department and its agencies truss design than the general marine hanging confidential lightweight much, this burning need for a separate arm of the Strength calculation.
Because the design of the combustion rotary arm speed is only 1 / 6 (r / min), therefore, in order to consider only the use of its efficiency in the use of a cone - cylindrical cut speed, so that in this design selected directly with the slowdown in device Flange installation type motor, the motor not only power and torque output to meet demand, but its output speed is only 25 n / min.
Rotary in the low-speed, large power plant burning arm, the required reducer axis need a high intensity, some of the more authoritative reference by the mechanical design manual, to check through strength, the choice of reducer shaft material for 20 CrMn .
Key words: slewing bearings, cone - cylindrical cut speed,