Fluid dynamic pressure bearing and manufacturing method thereof
A technology of fluid dynamic pressure bearings and dynamic pressure bearings, applied in bearings, shafts and bearings, shafts, etc., can solve problems such as uneven bearing pressure distribution, reduced bearing rotation accuracy, and uneven wear
Inactive Publication Date: 2019-03-01
TIANJIN NAVIGATION INSTR RES INST
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- Description
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- Application Information
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Problems solved by technology
[0003] At present, miniature dynamic pressure bearings mostly use equal-width grooves, and the pressure is mostly concentrated at the converging point of the grooves, resulting in uneven distribution of bearing pressure and uneven wear, and will also reduce the rotation accuracy of the bearing.
Method used
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[0025] The embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that the embodiments are illustrative, not restrictive, and cannot limit the protection scope of the present invention.
[0026] A fluid dynamic pressure bearing, comprising a dynamic pressure bearing body 3, multiple sets of dynamic pressure grooves are formed on the inner wall surface of the dynamic pressure bearing body, each set of dynamic pressure grooves includes a first flow channel 4 and a second flow channel 7, the first flow channel The first flow channel and the second flow channel are distributed symmetrically and meet to form a V shape. The width of the intersection 5 of the first flow channel and the second flow channel is smaller than the width of the outer edge 6 of the flow channel. When the fluid flows from the outer edge 6 to the intersection 5 due to the relative movement between the shaft and the bearing, due to...
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The invention relates to a fluid dynamic pressure bearing and a manufacturing method thereof. The fluid dynamic pressure bearing comprises a dynamic pressure bearing body, multiple groups of dynamic pressure grooves are formed in the inner wall surface of the dynamic pressure bearing body, each group of dynamic pressure grooves comprise first flow channels and second flow channels, and the first flow channels and the second flow channels are symmetrically distributed, and are joined to form V-shaped shapes. By means of the fluid dynamic pressure bearing structure and the manufacturing method thereof, the limiting rotating speed and the rotation accuracy of the fluid dynamic pressure bearing can be increased, the service life is prolonged, the fluid dynamic pressure bearing is processed through a forming cutter, and the fluid dynamic pressure bearing and the manufacturing method thereof are suitable for blank materials of different types, can reduce cutter wear, and have creativity andapplication value.
Description
technical field [0001] The invention relates to the technical field of fluid dynamic pressure bearings, in particular to a miniature dynamic pressure bearing in which dynamic pressure grooves are processed by forming tools and a manufacturing method thereof. Background technique [0002] With metallurgy, electric power, petrochemical, coal, mining, building materials, papermaking, municipal administration, water conservancy, shipbuilding, port loading and unloading and other fields, the demand for ultra-high-speed motors is increasing, and ball bearings and ordinary oil-impregnated bearings can no longer meet the speed and accuracy requirements. , and the dynamic pressure bearing adopts the principle of dynamic pressure, forming an oil film between the shaft and the bearing bush to support the rotary motion of the bearing. It has the characteristics of low noise, high rotary precision, long service life and small size, and is more suitable for use in ultra-high-speed fields. ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F16C32/06B23D79/00
CPCB23D79/00F16C32/0633F16C2220/20F16C2220/60
Inventor 刁彦飞陈涛金琛李楠魏江峰李凤婷
Owner TIANJIN NAVIGATION INSTR RES INST