Gas lubricated bearing applications

Application examples of gas lubricated bearings in machine tools

Gas lubricated bearings are mainly used for spindle support in machine tools, including workpiece axes, tool axes, grinding wheel shafts, etc. Machine tool spindle bearings generally use two types of hydrostatic bearings and hydrostatic bearings. Wave foil bearings can also be used for small high speed spindles. Gas hydrostatic bearings are the most widely used in machine tools, with small orifice throttling and toroidal throttling bearings being the most common. Porous gas hydrostatic bearings have been increasingly used in machine tool active static pressure hybrid lubrication bearings in recent years. Floating ring dynamic and static pressure gas bearings are newly developed high-speed gas-lubricated bearings in recent years, which are promising for high-speed spindle support.

Ultra-high-speed air bearing internal grinding heads are now capable of precision grinding of small holes and small holes. The use of air bearings improves the machining accuracy of the machine by 2-3 orders of magnitude, enabling precision mirror machining.

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Brief introduction: overall eccentric bearing

The overall eccentric bearing, also known as the eccentric bearing, is a very useful type of bearing. It mainly includes outer ring, inner ring, rolling body flower basket and rolling body. The overall eccentric bearing has simple structure and convenient use. It can realize eccentric function without eccentric shaft, which greatly simplifies the eccentric mechanism and saves the machining of eccentric mechanism. It saves time and assembly, and reduces the manufacturing cost of the eccentric mechanism.

The feature of the overall eccentric bearing is that the inner hole of the inner ring is an eccentric hole, and a longitudinal key groove is formed on the inner side wall of the eccentric hole.

Classification of integral eccentric bearings: One is a double-layer double-row tapered roller eccentric bearing; the cylindrical roller is a single-layer raceway small clearance or negative clearance cylindrical roller bearing, which is mainly installed on the printing plate cylinder and The two sides of the impression cylinder; the other is a double-layered raceway with an inner and outer eccentric negative clearance cylindrical roller bearing unit mounted on both sides of the rubber roller of the printing press. Due to its special structure, hollow cylindrical roller bearings have strong vibration absorption, long life and overload protection compared with conventional rolling bearings.

The application of the overall eccentric bearing: reducer, petrochemical, textile, metallurgy, mining, steel, etc., light and heavy machinery
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