Part-4: Roller Bearing Type detail overview it's application | Antifriction bearing Type |
बेयरिंग क्या है और बेयरिंग कितने प्रकार के होते हैं? किसी घूमनेवाली मशीन के अंग को संभालने के लिए धारुक या बेयरिंग (Bearings) का उपयोग होता है।
Ball bearings are the most common bearing type and can be found in many every day objects, such skateboards, blenders, bicycles, DVD players and photocopiers, Fan, Conveyors, etc. This type of bearing is typically used in applications which have a high speed and a low load.
Hydrostatic bearings use an external source to supply the necessary film pressure between surfaces. Hydrodynamic bearings generate the pressure through the relative motion of the surfaces and the converging geometry.
Hydrostatic bearings are a particular type of bearings that work on the principle of separating sliding surfaces using pressurized fluid: air, oil or any other type of lubricant.
Hydrostatic pressure arises due to the weight of a fluid acting on an object. Hydrodynamic pressure arises due to a fluid moving against an object and any pressure gradient in the system. These two pressures will occur together in real flows.
❖ Hydrodynamic Lubrication :- Formed the oil film by the relative movement of the friction surface.
❖ Hydrostatic Lubrication :- Formed the oil film on the friction surface by the external pressure oil.
Typical applications for hydrostatic and hydrodynamic bearings are machine tool spindles and slides; applications that require precise movement and high stiffness. Hydrostatic bearings and hydrodynamic bearings are both classified as types of fluid bearings.
Bearings are "parts that assist objects' rotation". They support the shaft that rotates inside the machinery. Machines that use bearings include automobiles, airplanes, electric generators and so on.
Rolling element bearings can be subdivided into two major types: ball bearings and roller bearings.
Bearings typically consist of the following components: Two rings, inner and outer, with raceways. Rolling elements - rollers or balls. A cage which keeps the rolling elements separated and helps guide motion.
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