analysis of slewing bearing load of a rotating

Slewing Bearings Bearing design types Basic information Pages 6 – 41 Bearing design types 6 – 7 Load transmission 8 Bearing selection 9 –10 Load factors for bearing selection 11 Example of a bearing selection 12 – 14 Service life 15 Example of a service Bearing type Dynamic load rating C [kN] Static load rating C0 [kN] Fatigue load limit PU [kN] Mass [kg] QIBR 240-630 8800 18000 1140 645 QIBR 240-670 10000 20400 1320 790 QIBR 24196 9000 15600 1040 605 As previously discussed the bearing stiffness varies with load and rotation

Analysis of the influence of slewing bearing mounting on

Jan 01 2019The main scientific goal of the article is to modernize the methods of designing the rotating mechanisms of working machines (excavators cranes backhoe loaders loaders) and other devices (wind turbines radars radio telescopes drilling machines wastewater treatment plants) in which the construction of the rotate node uses slewing bearings

Rotary bearings hold rotating components such as shafts or axles within mechanical systems and transfer axial and radial loads from the source of the load to the structure supporting it The simplest form of bearing the plain bearing consists of a shaft rotating in a hole Lubrication is used to reduce friction In the ball bearing and roller bearing to reduce sliding friction rolling

Equivalent static load It is the standard measurement that calculates and defines the level of hypothetical load that if applied would cause the same maximum load on the rolling elements of the rolling bearing as the actual loads that the rolling bearing is subjected to It considers all of the forces that the rolling bearing is subjected to

The slewing bearing of the full-revolving super large lifting equipment bears all loads above the rotating platform Due to the effect of bending moment the load conditions of the slewing bearing structure is complex and large which leads to the non-uniform of stress and uneven deformation and final seriously affects the work performance of lifting equipment

Sep 19 2013Analysis of arising radial forces in case of the unbalanced rotor and principle of its balancing by adding a balanced mass results from the drawing in Fig 2 Due to the unevenly distributed mass around the axis of rotation the center of gravity is shifted from its geometric center by the eccentricity e (given by the distance S T-)

Slew Ring Bearing Failure Analysis

Slew ring bearings are special types of bearings which are generally used in heavy machinery The difference between these type of bearings and normal bearings is that they have higher pitch value diameter the way they are mounted on the structures working nature which is generally "static" higher load carrying capacity and larger number of rolling elements

the spindle-bearing systems is similiar to those developed in rotor-dynamic The main purpose of this study an ANSYS Parametric Design Language (APDL) program based on finite element method has been developed for obtaining full analysis of rotordynamic in order to investigate the spindle-bearing dynamic behaviors

The load principle for such a measurement is shown in picture 1 The area between the companion structure beneath and the bearing ring screwed onto the upper structure is measured (picture 2) In order to minimise the influence of the elastic deformation of the companion structure the measurement must take place as close to the running system

All the time-domain signals used in this study are selected from the large-size heavy-load slewing bearing of a practical port crane The type of the slewing bearing type was 132 45 2800 03 The slewing bearing began to serve from Jul 2013 and its vibration data were collected from Feb 2015 to Dec 2017 about every 2 months

Sep 13 20152 1 Slewing Bearing Load Computation (Static and Dynamic Loads) 2 1 9 Slewing bearing static type selection and service life estimation For continuous operation high-speed rotation and other application occasions with specific requirements for "slewing bearing's life" (e g slewing bearings used in rotary conveying device packer and

Slew bearings are generally selected on the basis of the static load which is calculated using the forces for axial and radial loads coming on it as well as the tilting moment For correct selection of the slew bearing certain parameters such as speed load and operating temperature are required

The bearing acts as a mechanism of rotation and transmit the external load from the body to the underbody structure The bearings can be loaded by axial force Q radial force H and tilting moment M Fig 1 shows slewing bearing in the structure of a working machine The slewing bearings are selected on the basis of graphs of maximum bearing

The rolling bearing analysis software calculates the life of rolling bearings according ISO/TS 16281 considering the inner geometry of the bearing Considering the load distribution within the bearing clearance and tilting angle will affect the resulting bearing life Following bearing types are currently considered: Radial deep groove ball

ANALYSIS OF SLEWING BEARING LOAD OF A ROTATING

analysis and evaluation of excavator digging efficiency [8 9] Research into rotating drive mechanisms of excavator platforms deals with: a) loads of slewing bearing rolling elements [10 11] b) analysis of slewing bearing loads in excavators with excavating manipulators [12] and c) regulation of angular velocity of a rotating platform [13

1 Damage to the phenomenon of a slewing bearing In the truck crane excavators and other construction machinery the slewing ring is a transmission between the turntable and the chassis of the axial load radial load and tipping moment of the important parts In light load

Equivalent static load It is the standard measurement that calculates and defines the level of hypothetical load that if applied would cause the same maximum load on the rolling elements of the rolling bearing as the actual loads that the rolling bearing is subjected to It considers all of the forces that the rolling bearing is subjected to

The paper presents a general selection procedure for an axial bearing of a slewing platform drive in hydraulic excavators based on the spectrum of equivalent bearing loads A mathematical model of an excavator with a backhoe and a shovel attachment is defined to determine the spectrum of bearing loads on the basis of possible digging resistances specified in the entire working range of the

Stiffness analysis of slewing bearings Figure 1 points to a typical arrangement of four contact point slewing bearing Figure 1 also shows the usual load system acting on bearing in axial or radial direction very important influence on the dynamics of a rotating

Slew ring bearings are special types of bearings which are generally used in heavy machinery The difference between these type of bearings and normal bearings is that they have higher pitch value diameter the way they are mounted on the structures working nature which is generally "static" higher load carrying capacity and larger number of rolling elements

The load principle for such a measurement is shown in picture 1 The area between the companion structure beneath and the bearing ring screwed onto the upper structure is measured (picture 2) In order to minimise the influence of the elastic deformation of the companion structure the measurement must take place as close to the running system

Slewing With Degrees of Angle Continuous at R P M OPERATING LOADS TEST LOAD EXTREME SHOCK LOAD (NON-OPERATING) Axial or Thrust load (Parallel to axis or rotation) Radial load (Perpendicular to axis of rotation and without gear loads) Moment load resulting from axial or thrust loads rotating the bearing to distribute the grease evenly

Aug 07 2019This makes for a difficult bearing specification Rolling element slewing ring bearings have been the common choice of machine designers In order to optimize the lifetime of the bearings they have been located at the smallest possible diameter to minimize speed of rotating elements and lifetime distance traveled