本文選題：氣體靜壓 + 節(jié)流孔斜坡��； 參考：《機(jī)床與液壓》2017年13期

【摘要】：在一定條件下,氣體靜壓軸承在節(jié)流孔出口處會(huì)出現(xiàn)大幅度的壓力降低現(xiàn)象,這降低了軸承的承載能力與剛度。高速氣流從節(jié)流孔中噴射而出,在平面的阻擋下迅速轉(zhuǎn)向90°,這使得氣流在拐角處速度進(jìn)一步提高,進(jìn)而導(dǎo)致了壓力的降低。為提高氣體靜壓軸承的靜態(tài)特性,同時(shí)考慮靜壓軸承的加工性能,提出了在節(jié)流孔處加工斜坡的方法來抑制節(jié)流孔處的壓力陡降現(xiàn)象。建立了單孔止推軸承的低雷諾數(shù)K-ε湍流模型,在CFD仿真的基礎(chǔ)上,分析了不同傾斜角度下,軸承均壓區(qū)的壓力陡降比、承載特性與耗氣量,并得到如下結(jié)論:節(jié)流孔出口處的斜坡能明顯抑制壓力陡降現(xiàn)象;節(jié)流孔出口斜坡的傾角小于6°時(shí),傾角越大,其承載壓力陡降比越小;隨著傾角的增大,軸承的承載力增大,同時(shí)耗氣量上升。
[Abstract]:Under certain conditions, the pressure of the aerostatic bearing will be greatly reduced at the outlet of the throttle hole, which reduces the bearing capacity and stiffness. The high velocity flow jet from the throttle hole and turn to 90 擄quickly under the block of the plane, which makes the velocity of the air flow increase further at the corner, and then leads to the reduction of pressure. In order to improve the static characteristics of the aerostatic bearing and to consider the machining performance of the hydrostatic bearing, a method of machining the slope at the throttle hole is proposed to suppress the phenomenon of steep pressure drop at the throttle hole. The low Reynolds number K- 蔚 turbulence model of single hole thrust bearing is established. On the basis of CFD simulation, the pressure drop ratio, bearing characteristics and gas consumption of the bearing at different inclination angles are analyzed. The conclusions are as follows: the slope at the outlet of the throttle hole can obviously restrain the phenomenon of steep drop of pressure, when the inclination angle of the exit slope of the orifice is less than 6 擄, the larger the inclination angle is, the smaller the ratio of steep drop of bearing pressure is, and the bearing capacity increases with the increase of inclination angle. At the same time, the gas consumption increased.
【作者單位】： 哈爾濱工業(yè)大學(xué)精密工程研究所;
【分類號(hào)】：TH133.36

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1 程平,李受人,程耕國;液流通過節(jié)流孔的慣性長(zhǎng)的數(shù)值研究[J];水動(dòng)力學(xué)研究與進(jìn)展(A輯);2003年03期

2 ，

本文編號(hào)：1990246