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Composite Bearing Design Requirements
Sep 05, 2017

composite bearing design requirements
composite bearings in the work due to contact between the journal and the bearing will produce friction, resulting in surface heat, wear and even "killed", so the design of composite bearings, should be used to improve friction and friction of the composite bearing material bearing, suitable lubrication And the use of appropriate supply methods to improve the structure of composite bearings to obtain thick film lubrication.
1, tile surface corrosion: spectral analysis found that non-ferrous metal element concentration anomalies; spectrum appeared in many non-ferrous metal components of sub-micron wear particles; lubricants moisture exceeded, acid value exceeded.
2, journal surface corrosion: spectral analysis found that iron concentration anomalies, iron spectrum has many iron components of submicron particles, lubricating oil moisture or acid value exceeded.
3, journal surface tension: iron in the iron cutting grain or black oxide particles, the presence of metal surface tempering color.
4, tile back fretting wear: spectral analysis found that iron concentration anomalies, iron spectrum in many iron components submicron wear particles, lubricating oil moisture and acid value anomalies.
5, composite bearing surface strain: iron found in the cutting abrasive, abrasive composition of non-ferrous metals.
6, tile surface peeling: iron spectrum found in many large size fatigue flaking alloy wear particles, layered abrasive.
7, composite bearing burner: iron in the more large-size alloy abrasive and black metal oxide.
8, composite bearing wear: due to the metal properties of the shaft (high hardness, poor concession) and other reasons, easy to cause adhesive wear, abrasive wear, fatigue wear, fretting wear and so on.
composite bearings in the sliding friction work under the composite bearings. composite bearings work smoothly, reliable, no noise. In the liquid lubrication conditions, the sliding surface is separated by lubricating oil without direct contact, but also can greatly reduce the friction loss and surface wear, the film also has a certain vibration absorption capacity. But the starting frictional resistance is larger. The shaft is supported by the composite bearing part called the journal, and the part that matches the journal is called the bearing. The friction-reducing material layer cast on its inner surface in order to improve the frictional properties of the pad surface is called a composite bearing lining. Bushing and composite bearing lining material is collectively referred to as composite bearing material. composite bearing applications are generally in the low-speed heavy load conditions, or maintenance and filling the oil difficult parts of the operation.
1) metal materials such as composite bearing alloy, bronze, aluminum alloy, zinc-based alloy
composite bearing alloy: composite bearing alloy, also known as white alloy, mainly tin, lead, antimony and other metal alloys, because of its wear-resistant, high plasticity, good running performance, good thermal conductivity, good oil resistance is good , Suitable for heavy duty, high-speed box, composite bearing alloy strength is small, the price is more expensive, must be in the bronze, steel or cast iron pad casting, forming a thin coating.
2) porous metal materials (powder metallurgy materials)
Porous metal material: Porous metal is a powder material, it has a porous structure, if immersed in lubricating oil, so that filled with lubricating oil into a self-lubricating properties of oil composite bearings. Porous metal material toughness is very small, only applies to smooth, no impact load and medium and small speed situation.
3) Nonmetallic materials
composite bearings Plastic: Common composite bearings Plastic phenolic plastic, nylon, PTFE, plastic composite bearings with greater compressive strength and wear resistance, can be used for oil and water lubrication, but also with self-lubricating properties, but poor thermal conductivity.
composite bearings in the work due to the contact between the journal and the composite bearing will produce friction, resulting in surface heat, wear or even "death", so the composite bearing design should be used to improve the composite bearing composite bearings good friction, proper lubrication And the use of appropriate supply methods to improve the composite bearing structure, access to thick film lubrication.
1, tile surface corrosion: spectral analysis found that non-ferrous metal element concentration anomalies; spectrum appears in submicron wear particles of many non-ferrous metal components; lubricant moisture exceeded, acid value exceeded.
2, journal surface corrosion: spectral analysis found that iron concentration anomalies, iron spectrum, there are many iron components sub-micron particles, lubricating oil water content or acid value exceeded.
3, journal surface tension: iron in the iron cutting particles or black oxide particles, there is metal surface tempering color.
4, tile wear wear: spectral analysis found that iron concentration anomalies, iron spectrum of many iron components submicron wear particles, lubricating oil moisture and acid value anomalies.
5, composite bearing surface strain: iron found in the cutting abrasive, abrasive composition of non-ferrous metals.
6, tile surface stripping: iron found many large-scale fatigue exfoliation alloy wear particles, layered abrasive.
7, composite bearing burning tiles: iron quality of the larger alloy abrasive and ferrous metal oxide.
8, composite bearing wear: due to the metal properties of the shaft (high hardness, poor concessions) and other reasons, easily lead to adhesive wear, wear and tear wear, fatigue wear, fretting wear and so on.
Paint rust: paint rust is characterized by sealing the motor, the motor began to sound good, but in a period of time the warehouse, the motor becomes very abnormal sound, clear the composite bearing serious corrosion. Many manufacturers will be regarded as the former composite bearing problems, the main problem is a certain temperature varnish insulation, metal corrosion and protection of metal, the formation of corrosive substances, channel composite bearing corrosion damage.

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