Showing papers on "Slewing bearing published in 2006"

Rotary dangle head having continuous rotation

Abstract: A rotary dangle head having continuous rotation includes a rotator, a continuous rotary hydraulic union and a dangle head The rotator includes a support base, a slewing ring, a mounting plate and a ring rotator The slewing ring includes an outer bearing ring and an inner bearing ring The dangle head includes a retention bracket and a processing head The processing head is pivotally retained by the retention bracket The outer bearing ring is attached to a bottom of the support base The inner bearing ring is attached to a top of the mounting plate The ring rotator drives the outer bearing ring The retention plate is attached to a bottom of the mounting plate The continuous rotary hydraulic union is connected to hydraulically driven components mounted to the processing head

Disk feeding machine

Abstract: The utility model relates to a disk feeding machine, which is characterized in that a slewing ring bears and rotates a disk, and the slewing ring is composed of an external tooth ring with a big diameter, an inner ring of the slewing ring, the inner side of which is fixed to a machine base, and a rolling ball arranged between the external tooth ring and the inner ring, wherein the disk is fixed to the external tooth ring with a big diameter. The utility model not only inherits the transmission advantages of a speed reducer to internal tooth type slewing ring, but also overcomes the shortages which exist in the prior art. The utility model particularly has the advantages that transmission efficiency is high (bigger than 92 percent), bearing capacity of the disk is high, and transfer torsion and anti-overturn torsion are large; structure is compact, foundation is simple, and installations of speed reducers and adjustment of gear backlash are convenient; the utility model is also provided with a small gear and the external tooth type slewing ring, speed ratio is big, and requirements for speed reducers are low; compared with the speed reducer to internal tooth type slewing ring, the cost is lowered by more than 20 percent.

Built-in return working table

Abstract: The utility model provides a built-in revolving working table, which comprises a shell body, wherein a motor is installed in the shell body, and the motor is connected with a speed reducer by a synchronous belt; the speed reducer is provided with a gear which is meshed with a ring gear of a slewing ring; the slewing ring is provided with a rotary disk chuck which is connected with the slewing ring. The whole structure of the utility model is sealed in a cover, and the utility model has the advantages of compact structure, no contamination leakage, clean internal structure, always high precision, etc.

Single-row ball type slewing bearing of elliptic roller track and method for making same

Abstract: The invention discloses a single-raw ball rotation bearing with ellipse tray, which is characterized in that: its tray is ellipse, whose parameters of long semi axle and short semi axle can be calculated according to the steel ball curvature radius, the curvature radius and the contact angle at the contact point between the tray and the steel ball. The formula of long semi axle and short semi axle are provided. The invention can improve the working property and the service life, while the bearing ability is increased 33%.

Predication Methods of Residual Service Lifetime for Slewing Bearing Mounted in Ladle Turret

Abstract: This paper presents the main disabled forms,and discusses the limitations of the current methods in which rating lifetime is calculated and condition at operation is estimated for the large-diameter antifriction bearings.The novel method in which the residual service lifetime of slewing bearing mounted in ladle turret is evaluated by the dynamic abrasion loss is put forward.On the basis of the method,testing and analysis are carried out.The results shows that residual service lifetime is reasonably predicted and the method is valid.

Analysis of load capacity in a single-row slewing bearing

Abstract: Slewing bearings are basic components widely used in construction machinery industry.The load in the rolling elements of a single-row slewing bearing was calculated by using Herz's contact theory,and a theoretical formula was presented for the load capacity of this slewing bearing.Several structural and technical factors were found to significantly affect the load capacity of the slewing bearing studied.Methods to increase load capacity of slewing bearings are provided for technologists.