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Sliding bearing, sliding bearing), work under sliding friction bearings.Sliding bearing work steady, reliable, no noise.Under the condition of fluid lubrication, sliding surface is lubricating oil without direct contact, also can greatly reduce the friction loss and wear of surface oil film also has a certain vibration absorbing ability.But starting frictional resistance is bigger.The bearing parts of the shaft are called journal, and shaft neck matching parts called bush.In order to improve the bearing surface of the friction properties and in them on the surface of cast anti-friction material layer is called the bearing bush.Bearing and bearing liner material collectively known as the sliding bearing material.Sliding bearing applications generally under the condition of high speed light load condition.

The transformation and upgrading of Chinese bearing manufacturing industry production and marketing demand forecasting and analysis report, according to data from 2009-2013 gross industrial output value in bearing manufacturing industry in China increased year by year.Industry to achieve 2013 gross industrial output value of 249.363 billion yuan, increased by 12.92%. For nearly five years of data analysis found that bearing manufacturing industry in China from 2009 to 2013 sales revenue has increased year by year.In 2013, sales income 249.012 billion yuan, up 11.80% from a year earlier. Bearing industry rapid development in our country, bearing varieties from less to more, from low to high product quality and technical level, industry scale since the childhood, has formed a product category is complete, production layout reasonable basic professional production system.

Dynamic load rating To compare the bearing of the bearing capacity of the pitting, regulations bearing rated life expectancy of one million (106), can withstand the maximum load as the basic dynamic load rating, expressed as a C. Is bearing under dynamic load rating C, this work bearing one million r (106) and reliability of 90% pitting failure does not occur, the greater the C higher bearing capacity. The basic dynamic load rating 1.The centripetal bearing means pure radial load 2.Thrust ball bearing is refers to the pure axial load 3.Angular contact bearing is refers to produce pure radial displacement of the radial component

A bearing is a machine element that constrains relative motion to only the desired motion, and reduces friction between moving parts. The design of the bearing may, for example, provide for free linear movement of the moving part or for free rotation around a fixed axis; or, it may prevent a motion by controlling the vectors of normal forces that bear on the moving parts. Most bearings facilitate the desired motion by minimizing friction. Bearings are classified broadly according to the type of operation, the motions allowed, or to the directions of the loads (forces) applied to the parts.

Bearing (Bearing) is a kind of important modern machinery and equipment parts.Its main function is to support the mechanical rotator, reduce the coefficient of friction in the process of its movement (friction coefficient), and ensure its rotary precision (accuracy)

Early forms of linear motion bearings, is placed in a row of pry plate under a row of wooden poles.Modern linear motion bearings is using the same principle, but sometimes a ball instead of roller.The simplest is the rotation of the bearing sleeve bearing, it is just a between wheel and axle bushing.This design then is replaced by rolling bearing, is to use a lot of cylindrical roller instead of bushing, each as a single wheel roller.

Nanoscale lake in Italy found a ship built in 40 years BC in ancient Rome, was found early examples of ball bearing: a wooden ball bearing is used to support the rotary table.Leonardo Da Vinci is said to be in 1500 years or so have been carried out on a ball bearing description.Immature factors of ball bearing, it is important the ball collide, causing additional friction.But can put the ball in a small cage to prevent this phenomenon.Galileo in the 17th century, the ball is installed "cage" the description of the ball bearing done first.In the UK at the end of 17th century, c. the warrens design and manufacture of ball bearing, and in a coach on the trial and the p. worth taken out a patent on ball bearings.The earliest into practical rolling bearing with retainer is the clockmaker John harrison invention for making H3 timing plan in 1760.In Germany at the end of the eighteenth century H.R. Hertz published papers about the ball bearing contact stress.In Hertz achievement, on the basis of Germany's r. a. terr

In 883, friedrich fisher put forward using the appropriate production machine manufacture the same size and roundness accuracy of steel ball, laid the foundation of the bearing industry.Britain's o. Renault mathematical analyses of thor's findings, the Reynolds equation is derived, from then on, laid the foundation of hydrodynamic pressure lubrication theory.

According to the National Bureau of Statistics, in 2011 China bearing manufacturing industry scale (annual sales revenue of 20 million yuan of above) a total of 1416 enterprises, the annual gross value of industrial output achieved 193.211 billion yuan, up 27.59%;Sales income is 191.097 billion yuan, up 30.30%;Profit total 12.523 billion yuan, year-on-year growth of 26.54%.By 2015, our country bearing production is expected to more than 28 billion sets, advocate business wu income is expected to reach 210 billion yuan, to become the world's largest bearing production and sales base.

Industry overview According to the National Bureau of Statistics, in 2011 China bearing manufacturing industry scale (annual sales revenue of 20 million yuan of above) a total of 1416 enterprises, the annual gross value of industrial output achieved 193.211 billion yuan, up 27.59%;Sales income is 191.097 billion yuan, up 30.30%;Profit total 12.523 billion yuan, year-on-year growth of 26.54%.By 2015, our country bearing production is expected to more than 28 billion sets, advocate business wu income is expected to reach 210 billion yuan, to become the world's largest bearing production and sales base. The three prominent problems in the bearing industry of our country: are the industry production of low concentration, low r&d and innovation ability, low level of manufacturing technology. First, the industry concentration is low.Bearing sales of about $30 billion in the world the world eight big multinational companies accounted for 75% ~ 80%.Germany's two big companies accounted for 90% of the national tota

life Under certain load, bearing in case of pitting experience before the revolution or hours, known as the bearing life. The life of rolling bearing with revolution (or in the hours of work under a certain speed) definition: within the life of the bearing, should be in any of its bearing ring or rolling on initial fatigue damage (spalling or defect).Whatever the test in the laboratory or in actual use, can be clearly seen, under the same working conditions, the appearance of the same bearing the actual life.In addition there are several different definitions of bearing "life", one of which is known as the "service life", it represents a certain bearing before damage to the actual life is by the wear and tear, damage usually is not caused by fatigue, but due to abrasion, corrosion, damage to the seal, and so on. To determine the standard of bearing life, bearing life and reliability. Due to the manufacturing precision, material uniformity degree of difference, even the same material, same size with a batc

Linear bearings generally use a pad, bushing, or roller system to carry a load on a rail that need not be a straight line. The rail can be most any length, although that dimension is limited by the actuator. The durability of the bearing is determined by the load and required speed. Furthermore, rails can generally be any profile – simple flat surfaces, round polished rods, or complex profiles with polished ground surfaces on which balls or cylindrical rollers can ride. Hard (Rockwell 60) and ground bearing surfaces work best. Further classifications might be by size. For instance, miniature linear bearings might work well moving a biologic slide sample just a few millimeters beneath a microscope lens while industrial-bearings on injection molding machines carry tooling of several tons.

needle roller bearings are bearings with cylindrical rollers that are small in diameter relative to their length. The modified roller/raceway profile prevents stress peaks to extend bearing service life. supplies needle roller bearings in many different designs, series and in a wide range of sizes, which makes them appropriate for a wide variety of operating conditions and applications.

A pillow block bearing consists of a mounting bracket (pillow block) that houses a bearing and is used in low-torque, light load applications. With this configuration, the pillow block is bolted to a foundation, securing it, while the shaft and the inner ring of the bearing are free to rotate. Usually made of gray cast iron, pillow blocks come in two types, split or unsplit. With split pillow blocks the housing element or cap can be separated from the base. An unsplit pillow block is made from one solid piece. Often, the terms pillow block bearing and plumber block bearing are used synonymously but the two are different devices. Both are designed to be mounted to a surface through mounting holes on the base of the block. They differ in that plumber block bearings do contain an inner bearing and they are also designed for higher loads and more corrosive environments.

Cylindrical roller bearings are available in a wide range of designs, series, variants and sizes. The main design differences are the number of roller rows and the inner/outer ring flanges as well as cage designs and materials. The bearings can meet the challenges of applications faced with heavy radial loads and high speeds. Accommodating axial displacement (except for bearings with flanges on both the inner and outer rings), they offer high stiffness, low friction and long service life. Cylindrical roller bearings are also available in sealed or split designs. In sealed bearings, the rollers are protected from contaminants, water and dust, while providing lubricant retention and contaminant exclusion. This provides lower friction and longer service life. Split bearings are intended primarily for bearing arrangements which are difficult to access, such as crank shafts, where they simplify maintenance and replacements.