Ring groove cooling water lubrication dynamic and static pressure high speed bearing

Abstract

The present invention relates to a grooved cooling water-lubricated high-speed hydro-hybrid bearing, which comprises a bearing body and multiple groups of oil cavities; wherein, each of the oil cavities arranged in the middle of the inner wall of the bearing body is composed of a deep cavity and a shallow cavity; an oil inlet is arranged on each deep cavity; adjacent oil cavities are partitioned by a circumferential oil-sealing side; axial oil-sealing sides are formed on the edges of the oil cavities and the bearing body; annular grooves are symmetrically arranged on the axial oil-sealing sides on both sides of each oil cavity; moreover, the annular grooves are provided with cooling holes which penetrate the wall of the bearing body. Since the axial oil-sealing sides with the maximum heatquantity is provided with the annular grooves and the cooling holes into which lubricating medium can flow, hot medium can be mixed with the medium with normal temperature, moreover, the pressure gradient is reduced, and therefore temperature rise is reduced under the premise that rigidity is affected as little as possible.

Description

technical field [0001] The invention relates to a high-speed precision machine tool bearing, in particular to a ring groove cooling water lubricated dynamic and static pressure high-speed bearing. Background technique [0002] With the increasingly urgent demand for high-speed and high-precision machining, people have proposed the use of low-viscosity medium lubricated dynamic and static pressure bearing technology, using the physical characteristics of low viscosity and large specific heat of water and the dynamic pressure effect of the bearing at high speed to make the bearing work. The temperature rise is very low, and it can provide sufficient rigidity and bearing capacity. The support technology of water-lubricated dynamic and static pressure sliding bearings for high-speed precision machine tool spindles mainly includes deep cavity bearings and stepped cavity bearings. [0003] Deep cavity bearings use a cavity similar to hydrostatic bearings, use the enhanced dynamic...

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Problems solved by technology

[0004] The stepped cavity bearing can greatly enhance the dynamic pressure effect by using the stepped cavity, so that the bearing has high rigidity and is suitable for high-speed cutting machine tools (Zhang Yabin. Design research on water-lubricated dynamic and static pressure bearings for high-speed machine tools [D]. Xi'an Jiaotong University Master's Degree Thesis 2008 ), is a technology with great potential, but when d m ・N exceeds 1×10 6 Temperature rise will greatly affect its accuracy (Guo Ce, Sun Qinghong. Thermal characteristic analysis and thermal deformation calculation of high-speed and high-precision CNC lathe spindle system [J]. Journal of Southeast University, March 2005, Volume 35, Issue 2 (Natural Science version)), there is no d in China m ·N value higher than 5×10 5 Application of bearings (Guo Hongsheng, Jiao Rang, Zhang Jie, Niu Ben. Application research of water-lubricated high-speed dynamic and static pressure sliding bearings in machining [J] Manufacturing Technology and Machine Tool 2007 No. 9)

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