Thin slim ball bearing characteristics

slim ball bearing to achieve a very thin section bearing, but also to achieve a product miniaturization and lightweight. Diversity of products has expanded its range of purposes. In order to obtain a low friction bearing torque, high rigidity, good rotary precision, small diameter steel balls. Using a hollow shaft, ensuring lightweight space and wiring. Thin wall bearing rings were deep groove ball bearings, four point contact bearings, angular contact ball bearings. In different series are available in a variety of dollars more. Series depends on the cross-sectional size. Match ball and series. Deep groove ball bearings can support bi-directional axial load and radial load.

Slewing rings

Slewing is able to withstand the combined load bearing and can also withstand greater axial and radial load and overturning moment.
slewing ringses are also called wheel bearings, slim ball bearing  some people also call it: rotating support, maneuver support.
Slewing rings is widely used in the real industrial, known as: "the joints of the machine", is subject to the relative rotary motion between two objects, and also withstand axial, radial, overturning moment of machinery necessary for important parts.With the development of machinery industry, pivoting on ship equipment, engineering machinery, light industry, machinery, metallurgy, machinery, medical equipment, industrial machinery and other industries a wide range of applications.
Slewing bearing industry in China has gone through more than 20 years of development, since the JB2300-84 was first published in 1984 in the slewing bearing types, basic parameters and technical requirements for standard, and JB/T2300-1999 in the 1999 amendment of the slewing ring standard,  Other bearing China has been provided with a complete set of development and capacity of slewing bearings are designed, manufactured and tested.

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.

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.

The grid division of thin section angular contact bearings

  In carries on the grid division of thin section angular contact ball crossed roller bearings , the possible contact parts need unit size control slewing gear , using 5 units of the adjacent node distance of different mesh. Finite element model graph after mesh partitioning as follows.

Hypothesises on the basic theory of Hertz contact theory

In recent years, with the development of the equipment manufacturing industry, light thin wall bearing plays a more and more important role, especially in the application of aerospace field.

  Hertz  contact theory is a classical solution, what can solve most problems of the rolling bearing stress, the strain.

  Using Hertz theory for bearing contact analysis ,we need to make the following a few basic assumptions.

• the contact body material shall be homogeneous and isotropic.

• load vertical perpendicular to  the contact surface, that is to say the     contact surface is a smooth surface, where only the normal force exist, tangential friction does not.

• contact body is linear elastic body, obey the generalized Hooke law.

• compared to the radius of curvature of the contact surface of the object,the contact surface size is small.

  Therefore, Hertz theory usually used to solve the contact problems of the more regular contact body shape and the relatively simple boundary conditions.

Specific bearing,how to control.

In today’s world, product traceability is extremely important.In order to satisfy these requirements, requesting a Specification Control Drawing for a slim ball bearing,which is a valuable option to consider.

  A specification control drawing provides the user a concise description of the important bearing feature and parameters for a specific bearing.A specification
control drawing request will generate a unique part number for the standard bearing,including the commercially available options you have selected.

  This provides the customer quick and easy identification of product in the field as well as a concise receiving and inspection document for the factory.

India's large demand for construction machinery will give an opportunity to the Chinese market

In recent years, with the gradual slowdown in the pace of economic development in China, the development of construction thrust roller bearing machinery industry has entered a more difficult course, but we look to look to neighboring countries, with a large number of infrastructure projects undertaken to increase their demand for construction machinery and equipment, and our good performance engineering machinery products and cost-effective, as they are the best choice, which for China's construction machinery enterprises, is undoubtedly a better market is another.

It is understood that in the next five years, India will be focused mainly on the infrastructure piece, as the major driving force to accelerate the transformation of the economy, continued growth in the face of India's upcoming future infrastructure projects, which brought a huge market for construction machinery in India opportunities, but subject to various factors and constraints, the current development of construction machinery manufacturing industry in India is also relatively weak.

It is understood that, in India, the local purchase of construction machinery should be at least two years to properly put to use, while in China's construction machinery purchased only need six months to properly put into use, by contrast, China's construction machinery and equipment and Compared to India, more competitive and better able to meet with a large number of Indian construction machinery market demand.
Has experienced five consecutive years of 30% of the market growth, the Indian machine tool industry is facing a sharp decline in demand caused by customer demand declined. Despite such challenges, machine production in India is still basically the same as in previous years to maintain growth, including 86% of the contribution from the metal cutting machine tools, metal forming machine tools rest.

Faced with the global economic downturn, the Government of India in order to restore and maintain the momentum of industrial growth has also taken a series of positive responses.

CNC machine tools in India occupies about 65 percent of all sales in the machine. Throughout the slim ball bearing industry, lathes, machining centers, special machines, presses and grinders accounted for 80% of India's total 2008 production of machine tools, manufacturing evolving pushed to the status of India's ninth largest machine tool consumer market. Promote the growth of new industries demand for large machine tools, leading to increased imports. Speaking on metal processing machines, imported products accounted for 75% of India's domestic market share throughout. From the macroeconomic point of view, in April 2008 to March 2009 global economic downturn in the year, India's economy is smooth, and its gross domestic product growth of more than 5%. In the previous three years, India's GDP has maintained a continuous growth of more than 9% of the situation, making it the world's second-fastest economic growth in the country.

From the competitiveness of the industry itself, the Indian machine tool has the following characteristics: India and abroad promising users the ability to provide high-performance machine tools; efforts into high productivity, high efficiency, more cost competitive industry; attaches great importance to the quality of ; to establish close relationships with suppliers and integration of secondary suppliers; actively with the automotive industry, the defense industry and other customers to communicate.

Outside ball bearings

Outside ball bearings bearing consists of both sides with a sealed spherical ball bearings and cast (or steel stamping). Same spherical ball bearings and deep groove ball bearings inside the structure, but such a bearing inner ring is wider than the outer ring outer ring has a truncated spherical outer surface and a concave spherical bearing to match the self-aligning. There is a gap between the hole and the shaft is usually such a slim ball bearing, with the top wire, heart, sets tight sets or the bearing inner ring is fixed to the shaft, and rotate with the shaft.
Structural features
Spherical ball bearing is actually a variant of deep groove ball bearings, INA bearings is characterized by its outer diameter surface of the sphere, you can play with the corresponding inner concave spherical bearing self-aligning effect. Although its basic properties and deep groove ball bearings should be similar, but because most of the bearings used in the rough machine, the installation location is not precise enough, the axis of the shaft and housing bore neutral difference, or the long axis deflection like the case of large, and the precision of the bearings themselves is not high enough, some structure is relatively rough, so the actual performance of the performance specifications of the deep groove ball bearings the same play a considerable discount.
Spherical ball bearings with the top wire is applied to large stiffness difference deflection through shaft, the self aligning ball bearings with seals on both sides, can be tight to prevent dirt intrusion, had filled the right amount of lubricant at the factory before installation without cleaning, not require additional lubricant, the top end of the wire protruding screws on the bearing inner ring on the shaft tightened. Permissible axial load should not exceed 20% dynamic load rating.
With eccentric outer spherical ball bearings and spherical bearings performance with the top wire of the same, only the top wire is not on the inner ring, but in the eccentric sleeve. Bore tapered bore spherical ball bearings with 1:12 tapered bore taper, can be installed directly on the tapered shaft, or by means of an adapter bushing is mounted on the optical axis without shaft shoulder, and fine-tune the bearing clearance.
The use of spherical bearings
Spherical bearing the same internal structure and deep groove ball bearings, but this is wider than the outer ring of the ball and roller combined bearing

 inner ring, an outer ring has a spherical outer surface and a concave spherical bearing to match the self-aligning, compact, easy handling, supported using simple, commonly used in mining, metallurgy, textiles, transportation machinery.

How to identify bearing

    Identify the quality of the equipment bearing, we usually carry out the following aspects:
    The packaging is clear double row tapered roller bearings under normal circumstances, the regular manufacturers brand has its own dedicated external packaging designers to design and make arrangements for the clearance of the factory production conditions for production,therefore, in terms of product packaging lines the color should be very clear and unambiguous.
    Seal word is clear or not
    Bearing products every body will be in products thin section bearing the words printed on its brand, label and so on. Although the font is very small, but regular manufacturers of products using the stamp printing technology, but without the heat-treatment is carried out embossing, so the font may be small, but a deep concave, very clear. And under normal circumstances, not only fuzzy fonts counterfeit products, due to the rough printing technology, fonts floating on the surface, some of them can be easily erased or manually by hand signs seriously.
    Are there hetero ring
    Left hand holding the bearing sleeve body, right hand toggle coat a small margin to rotate back and forth, listening to the bearings during operation if there hetero ring. Because the majority of counterfeit products production conditions behind, completely hand-workshop-type operation, slim ball bearing the body in the production process will inevitably be braced with dust, sand a class of impurities, so in the bearing is rotating when there will be a hybrid ring or the phenomenon does not run smoothly . This is to determine whether the product by strict production standards, and the key with the regular operation of the
machine manufacturer's brand products.
     Are there traces of oil muddy surface
     Are there traces of oil muddy surface which requires that we should pay special attention to when buying imported bearings. It is easy to leave a thick oil stains Because there is a certain gap between domestic and foreign anti-rust technology advanced manufacturing country, therefore bearing body rust treatment, feeling sticky sticky thick hand contact when, while foreign original on imported bearings hardly see any trace of rust preventive oils. According to insiders, particularly careful person can smell the bearings to a special flavor, which is anti-rust oil taste.
     Chamfer is uniform
     The so-called bearing chamfer, which is the junction of the horizontal surface and vertical surface, counterfeit products slewing ring bearing

 production technology due to restrictions in parts of these corners was unsatisfactory treatment, which we can easily identify.
Bearing Package Packaging fair share in the manufacturing of packaging and packaging bearing completed and passed the test, namely cleaning and anti-rust treatment, then put the package in order to achieve water, moisture, dust, shock, maintaining quality and precision bearings and the purpose of ease of use and sale.

An anti dust sealed bearing

An anti dust sealed spindle bearing bearing, comprising a bearing outer ring, the inner ring of the bearing, roller, bearing ring and O ring, rolling body is arranged between the bearing outer ring and the inner ring of the bearing, the bearing outer ring and the inner ring of the bearing between the two ends are respectively provided with a slim ball bearing ring, the inner ring of the bearing is arranged on the outer surface and O shaped groove ring fit, O ring is embedded in the groove, bearing seal lip and the O ring surface contact. The utility model has the advantages as follows: combined sealing ring using O ring and the bearing, and in combination with the surface to prevent the dustfilled with oil to reach outside of bearing purpose. Widely used in machinery and equipment, dust effects of electrical appliances, hardware tools etc..