润滑与密封
潤滑與密封
윤활여밀봉
LUBRICATION ENGINEERING
2014年
8期
108-111,118
,共5页
可倾瓦推力轴承%重载%大型%热弹流%尺寸效应
可傾瓦推力軸承%重載%大型%熱彈流%呎吋效應
가경와추력축승%중재%대형%열탄류%척촌효응
tilting pad thrust bearing%heavy load%large size%thermoelastohydrodynamics%size effect
针对考虑热弹变形的大型重载推力轴承性能预测和尺寸效应问题，对某大型重载推力轴承进行热弹流计算，研究轴承性能随极端载荷与尺寸的变化规律。介绍可倾瓦推力轴承热弹流模型的基本方程，通过计算得到不同尺寸和比压下的轴承性能数据，讨论大型重载轴承的尺寸效应。结果表明：案例轴承瓦块最高油膜压力应远离瓦尖，靠近瓦块支点，该设计有利于压力分布均匀而提高承载力；对于大尺寸推力轴承，由于变形的影响，当载荷超过某一限制值后，轴承性能会随着载荷的稍微增加而发生剧烈变化，甚至导致烧瓦失效。为了避免该现象出现，推力轴承设计时应该进行最大许用比压校核；对于大型重载，还需进行瓦块弹性支撑或平衡梁等均载结构设计。
針對攷慮熱彈變形的大型重載推力軸承性能預測和呎吋效應問題，對某大型重載推力軸承進行熱彈流計算，研究軸承性能隨極耑載荷與呎吋的變化規律。介紹可傾瓦推力軸承熱彈流模型的基本方程，通過計算得到不同呎吋和比壓下的軸承性能數據，討論大型重載軸承的呎吋效應。結果錶明：案例軸承瓦塊最高油膜壓力應遠離瓦尖，靠近瓦塊支點，該設計有利于壓力分佈均勻而提高承載力；對于大呎吋推力軸承，由于變形的影響，噹載荷超過某一限製值後，軸承性能會隨著載荷的稍微增加而髮生劇烈變化，甚至導緻燒瓦失效。為瞭避免該現象齣現，推力軸承設計時應該進行最大許用比壓校覈；對于大型重載，還需進行瓦塊彈性支撐或平衡樑等均載結構設計。
침대고필열탄변형적대형중재추력축승성능예측화척촌효응문제，대모대형중재추력축승진행열탄류계산，연구축승성능수겁단재하여척촌적변화규률。개소가경와추력축승열탄류모형적기본방정，통과계산득도불동척촌화비압하적축승성능수거，토론대형중재축승적척촌효응。결과표명：안례축승와괴최고유막압력응원리와첨，고근와괴지점，해설계유리우압력분포균균이제고승재력；대우대척촌추력축승，유우변형적영향，당재하초과모일한제치후，축승성능회수착재하적초미증가이발생극렬변화，심지도치소와실효。위료피면해현상출현，추력축승설계시응해진행최대허용비압교핵；대우대형중재，환수진행와괴탄성지탱혹평형량등균재결구설계。
In order to solve problems of performance prediction considering thermoelastic deformation and size effect of large heavy thrust bearing,the performance variation of thrust bearing with extreme loads and sizes was studied through thermoelastohydrodynamic calculation of thrust bearing. The thermoelastohydrodynamic model basic equations of tilting pad thrust bearing were introduced. The bearing performance data under different size and specific pressure were obtained, and the size effect of large heavy thrust bearing was discussed. The results show that,the maximum film pressure should stay away from the tile tip,and close to the fulcrum. This helps to make the pressure uniform distribution and improve the bearing capacity. Due to the impact of the deformation,when the load exceeds a certain limit values,large heavy bearing performance will increase violently as the load changes slightly,even lead to burnt failure. To avoid this phenomenon,the maximum allowable specific pressure of thrust bearing should be checked,and the design of elastic support or balance beam for heavy load bearings is needed.
