Hydro-hybrid ceramic main shaft device

A spindle device, dynamic and static pressure technology, applied in the field of mechanical assembly parts, can solve the problems of short life of metal friction pairs, poor bearing capacity of water-lubricated spindles, temperature rise of oil-lubricated spindles, etc., to make up for poor tensile strength and improve wear resistance performance, the effect of increasing the spindle speed

Inactive Publication Date: 2011-08-17
TIANJIN UNIV
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Problems solved by technology

[0005] The present invention aims to solve the problems of high-speed machine tool dynamic and static pressure spindles, such as temperature rise of oil-lubricated spindles, poor bearing capacity of water-lubricated spindles, and short service life of metal friction pairs. Under the premise, reduce the temperature rise of the spindle liquid film and improve the life of the spindle friction pair

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Embodiment Construction

[0046] Aiming at the problems of high temperature rise and low bearing capacity of water-lubricated spindles at high speeds for ordinary oil-lubricated spindles, the present invention proposes a dynamic and static pressure ceramic spindle device, wherein the lubricant of the spindle is water-based lubricating fluid. In order to solve the problems of poor wear resistance and high thermal expansion coefficient of the traditional spindle-bearing metal friction pair, and to adapt to the state where boundary friction and dry friction are prone to occur in the low-viscosity lubrication of water-based lubricating fluid, the material of the spindle-bearing friction pair in the present invention for ceramic materials. In view of the fact that the structure of the simple ceramic sliding bearing is too simple to meet the working needs of the main shaft, and the ceramic parts are prone to stress concentration, the design of the main shaft structure in the present invention adopts the ceram...

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Abstract

The invention discloses a hydro-hybrid ceramic main shaft device which adopts a symmetrically arranged cone bearing structure and a structure of which a ceramic rubbing pair is totally wrapped by metal simultaneously in the aspect of structural design, and avoids shape mutation of all ceramic parts. The hydro-hybrid ceramic main shaft device disclosed by the invention adopts a ceramic hydro-hybrid bearing as the supporting bearing and cone hydro-hybrid bearings as the front bearing and the rear bearing, has the radial pressure bearing function and axial thrust function simultaneously, has a simple structure, and is provided with a conveniently adjusted axial gap; the hydro-hybrid ceramic main shaft device adopts the structure of which the ceramic rubbing pair is totally wrapped by metal, thus breaking of the ceramic parts caused by powerful stretching or higher force applied on the edges of parts is prevented; and all the ceramic parts avoid shape mutation when being designed, thus stress concentration inside the ceramic parts is reduced, and breaking of the ceramic parts caused by self design defects is prevented.

Description

technical field [0001] The invention relates to a mechanical assembly part, in particular to a high-speed dynamic and static pressure spindle device. Background technique [0002] CNC machine tools are developing in the direction of ultra-high speed and ultra-precision. As the core component of CNC machine tools, the machine tool spindle determines the performance level of the machine tool. The hydrodynamic and static pressure support method is widely used in the field of high-speed precision machine tools because of its excellent high-speed performance, high vibration damping, high rotation accuracy, high stiffness and small damping. [0003] At present, the main problems of the ordinary liquid dynamic and static piezoelectric spindle are: the temperature rise of the lubricating oil causes the spindle precision error to be too large, and the wear of the friction pair causes the spindle life to be low. The traditional dynamic and static pressure spindle is lubricated by oil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23B19/02
Inventor 林彬闫帅刘峰
Owner TIANJIN UNIV
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