rotary bearing,linear plain bearings

rotary 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 the movement, and guarantee its rotation accuracy.

By the frictional properties of motion elements, linear plain bearings can be divided into two categories, the rolling bearing and sliding bearing. The rolling bearing is standardization, seriation, but compared with sliding bearing radial size of it, the vibration and noise is bigger, the price is higher also.

Rolling bearings generally consists of outer ring, inner ring, rolling body and keep the frame of four parts. According to the shape of the roller, the rolling bearing can be divided into two types: ball bearings and roller bearings.

The composition of the ball and roller combined bearing

The work of ball and roller combined 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. thin section 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 sliding 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 features of metallurgical bearing

Commonly used material of metallurgical bearing is bearing alloy (also called babbit or white metal), cross roller 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.

rolling mill bearing

rolling mill 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 double direction thrust ball 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.

The linear bearing

miniature linear bearings is used in linear motion ball or sliding bearing. high precision ball bearings consists of a plastic cage, guide the ball rolling with bearing of hardened steel rolling way. Bearing on grinding hardening axis movement. Linear sliding bearing consists of a plastic sleeve, sleeve is installed in the steel bearing box, mobile in grinding optical axis.

single direction thrust ball bearing the matters needing attention

single direction thrust ball bearing fatigue rupture caused by unbalanced vibration, the deflection of shaft and edge load, overload, babbitt slewing bearing manufacturer fatigue rupture. Bearing repair installation quality is not high 1, improve the quality of installation, reduce the bearing vibration

2, prevent partial load and overload

3, adopt appropriate babbitt, and a new bearing structure

4, strictly control the temperature rise

Hair big particles as lubricating oil dirt into the bearing clearance, and embedded hidden on the bearing bushing, the bearing contact with the journal (or thrust plate), the formation of crusts, when running seriously scratch the surface of the shaft, note oil clean hair bearing, especially of maintenance, should pay attention to the metal dust or dirt to clean clean

the Maintenance methods of four point contact ball slewing bearing

four point contact ball slewing bearing Damage type failure due to handle method

Agglutination bearing overheating and excessive load, improper operation or the temperature control system failure 1, found in sports such as bearing overheating, should immediately stop check, had better take the rotor at low speeds continue to run, or continue to fuel supply for a period of time, until the bearing shell cooling down. Otherwise, the bearing shell on the babbitt due to glue stick on the shaft neck, trouble to fix it

2, prevent the lubricating oil is insufficient or oil mixed with impurities, and the rotor of the installation

3, damage to the glue, lighter offshore crane bearing shell can scrape grind repair method to eliminate, continue to use