The establishment of flexible supporting thin angular contact bearing model

According to the thin wall of an aeroengine with angular contact ball bearing AC71907 as an example to analyze.

  Bearing parameters, outer diameter is 55mm, the outer ring raceway diameter is 50.586mm, the inner diameter is 35mm, the inner ring raceway diameter is 39.423mm, the ball diameter 5.556mm, the ball number 15, ( thin wall bearings )the initial contact angle of 25 deg..

  Between the bearing seat and the bearing outer ring is in interference fit, with the gap of m in 0-15um.

Thin wall bearing in recent years

In recent years, with the development of finite element, boundary element numerical calculation method, to consider the ferrule deformation and boundary condition of load distribution of rolling mill bearing is possible.

  This paper established a flexible support thin angular contact ball bearing finite element analysis of the load distribution model, considering the ferrule deformation and boundary conditions on the bearing load distribution, the influence law of life and stiffness properties of the ANSYS tutorial,（thin wall bearings ）and the calculated results of the finite element method and quasi dynamic method and the experimental results are compared.

Thin wall bearing and aero engine

For some special rolling mill bearing , such as aviation engine in order to reduce the weight and the use of thin wall bearing , fit for a gap between the bearing outer ring and bearing seat hole case, because the thin wall ring rigidity is small, with the accuracy of both will have influence on the internal load distribution of bearing, displacement calculation of load distribution at this time ，

  When considering only contact the deformation is the displacement of Hertz is not enough, must consider the bending deformation after loading effect on the load distribution of the inner ring and the outer ring, radar bearing ， which is the so-called flexible supporting bearing load distribution problem, which makes the theoretical solution increased the degree of difficulty.

Thin wall bearing ANSYS tutorial

Load distribution of rolling mill bearing in mechanical basic research is the rolling bearing determines the performance and the service life of bearing. The calculation of the general working conditions of rolling bearing load distribution,thin section bearing often do not consider the influence of coordination and elastic deformation of the outer ring and the bearing factors.

  Jones based on Hertz contact theory and the rigid ferrule hypothesis is proposed on the quasi dynamic method, slewing ring bearings used to calculate the rolling characteristics of bearing load distribution. This treatment results and actual situation although there are differences, but because the calculation method is simple, is still widely used in practical engineering ANSYS tutorial.

Modeling of thin-wall angular contact ball bearings

Because the need analysis of multiple change, load structure parameters on the performance of thin wall bearings, so in order to reduce repeated work analysis in modeling software ANSYS, design language in this paper using ANSYS finite element software provides the APDL parameter,

  the command to write parametric modeling of thin-wall angular contact ball bearing component of the flow, simplifies the process of repetition modeling,
and its optimal design and the two development laid a good.

The thin-wall angular contact ball bearings

In order to accurately calculate the flexible bearing load distribution, taking the outer ring isolated point supported thin-walled angular contact ball bearing for example, the establishment of a three-dimensional finite element analysis model, considering the outer ring after loading of bending deformation of the rolling body effect of load distribution, thin section bearing

  Analysis under different working conditions of bearing load distribution, change law of life and stiffness properties, and the calculated results of the finite element method and quasi dynamic method and the experimental results were analyzed and compared, ANSYS tutorial.

  The results show that,radar bearing ， the finite element method calculation results and experimental results are more close.

Slewing bearings used in construction machinery

Slewing bearings are widely used thin section bearing , engineering machinery is the most extensive application ofslewing bearing is initially applied places, such as the earth moving machinery, excavators( excavator bearing ),disintegrating machine, stacker reclaimer, flat machine, roller, compaction machine, drillingmachine, boring machine etc.. There are other,

• Concrete Machinery, concrete pump truck, concrete mixer cloth rod integrated machine, belt conveyor
• Feeding Machinery, disc feeder, sand mixing machine
• Crane, wheeled crane, crawler crane, portal crane, tower crane, fork type crane, crane, crane with Longmen
• Foundation Processing Machinery, percussive reverse circulation drill, rotary drilling rig, percussiverotary drill, rotary drilling rig, reverse circulation rotary drilling rig( rotary bearing ), normal circulation rotary drilling rig, long spiral engineering drilling machine, submersible drilling machine, static pressure pilemachine, piling machine
• Engineering Ship,dredger,ship loader bearing
• Special Purpose Vehicle,bridge detection vehicle, fire truck, window cleaning machine, plate girder transport vehicle, aerial vehicles, self-propelled aerial work platform
• Light Industry Machinery, beverage machinery, bottle blowing machine, packing machine, filling machine, rotary bottle arranging machine, injection molding machine,The ship crane.

Four series of slewing ring bearings

Slewing ring bearings, a comprehensive load to bear a large bearings,can bear larger axial and radial load and overturning moment at the same time. Slewing ring bearings are generally installed with a hole, internal or external gear lubricants hole and sealing devices, which enable mainframe, design guide is simple, compact structure, easy maintenance.

  Slewing ring bearings have four series, four point contact ball bearing of no tooth type, external gear and the internal gear type ,double row angular contact bearing ,cross cylindrical roller bearing, crossed tapered roller bearing and three row cylindrical roller combined bearing .

  Four point contact ball slewing bearings have higher static load capacity, cross cylinder the roller has a higher dynamic load capability, crossed tapered roller bearing preloaded can make bearing with large supporting rigidity and rotation accuracy, three row cylindrical roller combined bearings due to highly improving the carrying capacity of the bearings, a variety of power by different raceway bearing, so in the same under the condition of stress, the bearing diameter can be greatly reduced.Thus the characteristic make  host more compact is a kind of slewing bearing of high bearing capacity.

  Slewing ring bearings are widely used for hoisting machinery, mining machinery, construction machinery, port machinery, ship machinery ,large rotary device, high precision radar mechanical and missile launchers on the equipment. At the same time,  design according to the specific requirements of users,development and production of various special structure of slewing bearing.

New machinery component

Slewing ring bearings are new type of mechanical parts for nearly forty years gradually on the rise in the world, which have inner and outer ring, rolling body composition, etc. at present, Chinese shaping slewing bearing production, mainly in the early 80 by the Ministry of machinery industry specified Tianjin Engineering Machinery Research Institute organized to introduce the design and manufacturing technology of the former Federal Republic of Germany Rothe company Erde.

  Released in December 20, 1984, the Ministry of machinery industry standard of the people's Republic of China， JB/2300-84 Rotary Bearing Types, Basic Parameters and Technical Requirements, mainly by the Ministry of machinery and electronics industry of Tianjin Engineering Machinery Research Institute, Xuzhou Hailin slewing ring factory is responsible for drafting, later the country again in 1991 issued a construction machinery standards, JB36.1-36.3-91, in 1999 and 2011 has issued new machinery industry standard JB/2300-1999 and JB/2300-2011 .