The composition of four point contact ball slewing bearing structure

The work of four point contact ball slewing bearing is sliding friction; The rolling friction is mainly depends on the size of the manufacturing accuracy; And the size of the sliding bearing friction is mainly depends on the slip plane of the bearing material. Sliding bearing generally face all have self-lubricating function; Sliding bearing according to the material divided into sliding bearing and sliding bearing metal, not of metal.

Non-metallic offshore crane bearing mainly plastic bearings, plastic bearings are generally USES the engineering plastic with good performance comparison; More professional manufacturers generally have self-lubricating engineering plastics modification technology, through the fibers, special lubricants, glass beads and so on to self-lubrication engineering plastics modification to enhance performance, and then use modified plastics by injection molding processing into self-lubricating plastic bearings.

Metal sliding bearing is currently the most used three layer composite bearings, the bearings are generally based on carbon steel substrate, through sintering technology in steel plate on a layer of spherical copper powder sintered first, and then sintering layer on copper powder layer is about 0.03 mm PTFE lubricant; One intermediate layer spherical copper powder main effect is to enhance the bonding strength between the steel plate with PTFE, at work, of course, also have certain bearing and lubrication effect.

The main characteristics of thin wall bearings folding edit this paragraph

Commonly used material of thin wall bearings is bearing alloy (also called babbit or white metal), miniature linear bearings wear resistant cast iron, copper and aluminum alloy, powder metallurgy materials, plastics, rubber, hardwood and carbon - graphite, PTFE (teflon, PTFE), modified polyformaldehyde (POM), etc.

linear plain bearings

linear plain bearings 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 mobile crane 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 low speed and heavy loading conditions, or maintenance and charging of lubricating oil is difficult work.

Triple row roller slewing bearing

Flange bearings from printers, fax machines to monitor, using household items in their daily lives, there my company's products bearing the bearing show technology space.ABEC-1 in standard dimensions and accuracy requirements, produce bearings, which can meet the general use of the product.
Outer flange on the series, is the axial position is simple: no longer need housing, Taper roller bearings more cost effective.To get bearings low-friction torsional Rotary precision, high rigidity and good the Cabinet, using small-diameter steel balls.The use of hollow shaft, to ensure that the light-weight and wiring space.Main use: Robotics, medical devices.Office equipment.Medical instruments.Slow speed device.Motor.Optical imaging devices. taper roller bearing The card reader.

Thin section bearings

High speed bearing installation and adjustment:
1. high speed bearing fit and clearance due to the high speed bearings according to requirements of high precision bearings, and required by the high temperature bearings, so when considering the fit and clearance, to take into consideration the following two points:
(1) rose from room temperature to high temperature dimensional change and hardness changes;
(2) high-speed centrifugal force caused by the force of change and shape change.
In short, in conditions of Slewing drives, high temperature, from coordination and clearance on the choice to try to keep the accuracy and performance of the bearing, which is difficult.
In order to ensure that after installation of bearing Raceway deformation is small, KOYO 7319AC angular contact ball bearings fit interference cannot be made too large, of centrifugal force and high speed and high temperature thermal expansion, or offset the mating surfaces of the normal pressure.Or Flange Slewing Bearing relaxing the mating surfaces, interference must therefore consider the premise of these two factors carefully calculated effective interference at room temperature under normal speed for high precision bearings may be invalid.

Exponentially growing of wind power installed capacity

From the current wind power bearing development situation, the wind power installed capacity will grow exponentially, the planning objectives will be greatly exceeded. 2007 is estimated to reach 5 million kilowatts, eleven five to three years ahead of the target planning.

  Experts predict that by 2020 will reach 120,000,000 kilowatts,crane bearing ， an average annual increase of 10 million kW .

Development strategy according to the China energy today, the state will greatly improve the wind energy（ wind power bearing ）, solar energy, biomass and other renewable energy in the whole energy consumption.

  The proportion of. In this strategy under the guidance of this year, to Chinese wind power industry development quickly.

  According to the Chinese renewable energy and long-term development plan put forward the development of wind power target,metallurgical bearing

• In 2010 the national wind power installed capacity has reached 5 kilowatts million
• In 2015 the national wind power installed capacity has reached 15 kilowatts million
• In 2020 the national wind power installed capacity reached 30 kilowatts million