Full complement cylindrical roller bearings rust prevention in the paint

Rust paint is the feature of in a sealed motor, the start motor sounds good, but in the warehouse for a period of time, motor become very abnormal sound, remove Full complement cylindrical roller bearings serious rust. Many manufacturers will be deemed to be the front bearing, the main problem is that the insulating paint volatile acid under certain temperature and humidity of metal corrosion and protection, the formation of corrosive substances, channel sliding bearing corrosion damage.Sliding bearing life is manufacturing, assembly, closely related to the use, must make every link, in order to make the country works the best bearing, so as to prolong the service life of bearing.

1, some enterprises in the process of production coating machine Spherical roller bearings no rust cleaning procedures and oil seal antirust packing in strict accordance with the requirements of the coating machine in the process of machining bearing parts and assembly after coating machine bearing products antirust processing. Such as ring in the process of turnover turnover time is too long, outer cylindrical contact corrosive liquids or gases, etc.

2, some enterprises in the production of antirust oil, cleaning products such as kerosene used quality can not reach the requirements of the technology.

3, due to a coating machine bearing steel price drop down again, resulting in coating machine bearing steel quality decline gradually. Such as non-metallic impurities content in steel on the high side, the increase of sulfur content in steel making material itself corrosion resistance drops), metallurgical structure deviation, etc. Is now used in the coating machine production enterprise source of bearing steel is miscellaneous, steel quality ichthyosaurs fraud.

4, part of the enterprise's poor environmental conditions, harmful content is high in the air, flow field is too small, it is difficult to effectively antirust processing. Coupled with the hot weather, the production workers in violation of the phenomenon such as antirust procedures were there.

5, some enterprises anti-rust paper, nylon paper (bag) and plastic tube coating machine, such as sliding bearing packing material is not accord with the requirement of roll coater bearing oil seal rustproof packaging is one of corrosion factors.

6, some enterprises coating machine sliding bearing ring turning small allowance and allowance of grinding, the oxide coating on the outer circle, failed to completely remove decarburization layer is also one of the reasons.

The choice of Deep groove ball bearing in the bearing shell

Deep groove ball bearing on the job as a result of the journal and bearing contact will produce friction, surface cause fever, even "killed", so in the design of the bearing, should choose Excavator Slewing Bearing materials with good sex of anti-friction bearings, suitable lubricant and appropriate supply method is adopted to improve the bearing structure for thick film lubrication, etc.

1, tile surface corrosion: spectrum analysis found that non-ferrous metal element concentration anomaly; Spectrum appeared a lot of non-ferrous metal components of sub-micron wear particles; Lubricating oil excess moisture, acid value exceeds bid.

2, shaft neck surface corrosion: spectrum analysis found that iron concentration is unusual, there are a lot of iron in iron spectrum of submicron particles, water or high acid value oil paint.

3, a shaft neck surface strain: iron spectrum have iron series cutting grinding grain or black oxide particles, metal surface heat tint.

4, tile back micro wear: spectrum analysis found that iron concentration is unusual, there are a lot of iron in iron spectrum wear submicron particles, lubricating oil moisture and acid value anomalies.

5, a bearing surface strain: iron spectrum found cutting abrasive, abrasive ingredients for non-ferrous metal.

double direction thrust ball bearing manufacturing materials

1) metal materials, such as bearing alloy, bronze, aluminum alloy, zinc base alloy, etc

double direction thrust ball bearing, bearing alloy is also called the white metal, tin, lead, antimony and other metal alloy, because of its good wear resistant, high plasticity, running-in performance is good, good thermal conductivity and resistance to adhesive and good and good and oil adsorption, therefore applicable to the overloading, high-speed cases, the strength of the bearing alloy is small, the price is more expensive, must be cast in bronze, steel or cast iron shell, form a thin coating.

2) the porous metal material (powder metallurgy materials)

Porous metal materials, metallurgical bearing is a kind of powder material, it has porous organization, if the immersion in the lubricating oil, full of lubricating oil in the pores, into the oil bearing, has self lubricating performance. The toughness of the porous metal material is small, only suitable for smooth without impact load and medium and small speed.

3) non-metallic materials

Commonly used bearing bearing plastic: plastic with phenolic plastics, nylon, ptfe and so on, plastic bearings have larger compressive strength and abrasion resistance, oil and water lubrication, also has the self-lubricating properties, but poor thermal conductivity.

Plastic bearings and metal sliding bearing the following differences:

1, the single direction thrust ball bearing are lubricating material, long service life. The metal sliding bearing lubrication layer is only 0.003 mm of PTFE surface, thin layer when the friction after it proclaims the end of the service life; 2, plastic bearings use will not happen in phenomenon of rust and corrosion resistance, and metal type of bearing is easy to rust cannot be applied to chemical liquid; 3, plastic lighter than metal bearing quality, it is more suitable for modern lightweight design trend; 4, rolling mill bearing manufacturing cost is relatively lower metals; Plastic bearings is the injection molding processing and become more suitable for mass production; 5, plastic bearings in operation without any noise, has a certain vibration absorption function; Due to plastic bearing is metal sliding bearing has many advantages, the production of plastic bearing is expanding increasingly, the use of plastic bearing situation is outspread, from fitness equipment to the office equipment and automobile industry, and so on all use plastic bearings, run on the roads of the car was not to use plastic bearings. Plastic bearing the market foreground is wide!

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.