Slewing bearing

About: Slewing bearing is a research topic. Over the lifetime, 1498 publications have been published within this topic receiving 5309 citations.

Noise and vibration on the bogie of a mass rapid train

Abstract: This paper investigated a noise and vibration concern on a metro train while the train made turns. The study was conducted to identify the root causes of the vibration and noise through hardware experimental testing as well as dynamic computer simulation. The initial investigation indicated the noise came from the bogie of the train. It was between the slewing ring bearing and the friction sets. A lab test was established to duplicate the reported problem and to root out the causes. One-factor-at-a-time method was used to screen the main key factors. Under certain contact conditions, unsmooth turning would occur and cause the noise and vibration. Dynamic simulation was proposed in the study to predict the potential issue. A multibody dynamic model was built with train body, underbody, slewing ring bearing and friction set to simulate the train turning motion. The results showed unsmooth/discontinuous dynamic motions and torque oscillation behaviors. The stop-and-go and stick-and-slip motion led to the vibration. The analysis confirmed the unsmooth friction forces and adhesion could cause the noise and vibration. The computer simulation showed good correlation with the hardware testing. It demonstrated the computer dynamic simulation could be used to predict the potential friction induced vibration issues. In the study, a different substitute material was also investigated through the computer simulation. The results showed the vibration could be effectively reduced if ceramic compound friction material was used.

Double row chain wheel type slewing bearing

Abstract: The utility model discloses a double row chain wheel type slewing bearing, which comprises an annular support ring. A double row chain wheel is sleeved outside the annular support ring, two rows of sprockets which are opposite to each other are distributed on the periphery of the double row chain wheel, two semi-circle ball grooves which are matched with each other are respectively arranged on the outer lateral wall of the annular support ring and the inner lateral wall of the double row chain wheel, and the two semi-circle ball grooves form a ball groove for placing a ball. The double row chain wheel type slewing bearing enables a teeth portion type of a ball-type slewing bearing to be changed into a sprocket structure, thereby being capable of improving application area of the slewing bearing, meeting requirements of a host machine for carrying capacity, and improving stability of chain wheel transmission.

Use automation in aerogenerator device that unties mooring rope

Abstract: The utility model discloses an use automation in aerogenerator device that unties mooring rope, a serial communication port, be the input shaft including one end, the other end is the speed reducer of output shaft, the speed reducer is fixed on the support, aerogenerator's cabin and slewing bearing inner circle are yaw when rotating, take movable support to rotate around aerogenerator's pylon together, coaxial arrangement has gear and cam respectively on the input shaft of speed reducer and output shaft, the gear meshes with the external gear of aerogenerator's slewing bearing outer lane mutually, when the support rotates, the gear is around self axis rotation, two gyro wheel limit switch's gyro wheel contacts with the outer profiled surface of cam, untie the mooring rope the controller of action by control and receive the limit switch signal that comes from gyro wheel limit switch. The utility model provides a device that unties the mooring rope passes through gear and slewing bearing's outer gear engagement, and the accurate driftage angle of judging the fan of ability is in time untied the mooring rope, has guaranteed the normal reliability service of unit, has lengthened the life of equipment.

Static Load Carrying Capacity in Four Contact Point Slewing Bearings: Theoretical and Preliminary Finite Element Calculations

Abstract: This paper presents a theoretical model to calculate the general static load-carrying capacity of four-contact-point slewing bearings under axial, radial and tilting-moment loads, compared with preliminary results obtained from a detailed parametric finite element model of the bearing. The theoretical model is based on a generalization of Sjovall and Rumbarger’s equations and provides an acceptance surface in the load space. The finite element model is based on the modelization of the balls via nonlinear traction-only equivalent spring concept. The aim is to validate the theoretical model to be used as an acceptance curve generator for slewing bearing design.© 2010 ASME

Totally enclosed revolving stage

Abstract: The utility model relates to an automatic transfer chain, specifically speaking is a totally enclosed revolving stage, including the basic framework, the basic framework edge is provided with the support, and the basic framework middle part is provided with slewing bearing, and the rotary drive assembly drive of slewing bearing on by the basic framework is rotated, slewing bearing's inner circle top is provided with rotatory roll table, is the linearity on the rotatory roll table and arranges that two are listed as conveying roller. The product of the utility model is simple in structure, reasonable in design is ingenious, arranges in the use in transfer chain intercrossing position department. The utility model discloses rotatory roll table in the product can rotate as required to in the transmission line intercommunication that will put through.