Journal of Jilin University(Engineering and Technology Edition) ›› 2021, Vol. 51 ›› Issue (2): 450-457.doi: 10.13229/j.cnki.jdxbgxb20190998

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High⁃speed characteristics of micro⁃beveled heavy duty hydrostatic bearing lubricant oil film

Yan-qin ZHANG1,2(),Yi LUO1,Shi-qian NI3(),Ru-kang WU2,Zhi-quan ZHANG4   

  1. 1.College of Mechanical Engineering，Nanjing Institute of Technology，Nanjing 211167，China
    2.Yanshan University & Nanjing Institute of Technology Joint Research Institute，Nanjing Institute of Technology，Nanjing 211167，China
    3.Nanjing Vocational Institute of Transport Technology，Nanjing 211188，China
    4.School of Mechanical Power Engineering，Harbin University of Science and Technology，Harbin 150080，China
  • Received:2019-11-02 Online:2021-03-01 Published:2021-02-09
  • Contact: Shi-qian NI E-mail:yanqin.zhang@njit.edu.cn;nsqmoney@163.com

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Abstract:

For large size hydrostatic bearings in heavy equipment manufacturing， it is easy to cause lubrication failure when running at high speed. In this paper， the lubrication performance of wedge oil film for hydrostatic bearing is studied under variable viscosity and high speed operation. Based on lubrication theory of bearings， the flow rate equation， the hydrostatic bearing capacity equation and the dynamic pressure bearing capacity equation of micro-beveled rectangular cavity affected by different speed and angle are deduced. CFD and FLUENT are used to simulate the oil film lubrication performance of bearings at higher speeds of 100 r/min， 120 r/min， 140 r/min， 160 r/min， 180 r/min and 200 r/min， respectively. The comprehensive influence law of oil cavity pressure， fluid velocity， vorticity and flow rate is revealed under the influence of higher speed changes. Finally， the oil film pressure field affected by higher speeds is tested under certain wedge height and higher speed， which verifies the theoretical analysis and simulation. It is found that hydrostatic failure of flat oil pad is very obvious at high speed. The micro-bevel oil pad can compensate the hydrostatic loss by the high-speed operation of the hydrostatic bearing. The dynamic pressure compensation range of the bearing is 16%~30%. The experimental and numerical simulation results of bearing operation have a good consistency at higher speeds.

Key words: heavy-duty hydrostatic bearing, lubrication failure, compensate, micro-beveled, dynamic pressure

CLC Number: 

  • TH122

Fig.1

Double rectangular cavity hydrostatic circular guide"

Table 1

Structureparameters of bearing"

参数数值参数数值
转台自重/t9.85油腔长度/mm300
最大工件重/t32油腔宽度/mm190
转台直径/mm4500进油孔直径/mm15
转速范围/(r·min-1)1~200油腔深度/mm3
油垫个数12初始油膜厚度/mm0.1
液压油牌号32#四周封油边宽度/mm11
液压油黏度/（Pa?s）0.045导轨内半径/mm692.5
液压油密度/(kg·m-3)880导轨外半径/mm975

Fig.2

Double rectangular cavity structure dimension"

Fig.3

Dynamic pressure oil wedge pressure profile"

Fig.4

Grid model"

Fig.5

Pressure field under Δh 0.06 mm at 180 r/min"

Fig.6

Pressuredistribution under Δh 0.06 mm at 180 r/min"

Fig.7

Average pressure value of different oil wedge heights under load of 20 t at high rotation speed"

Table 2

Static pressure failure of plane oil pad bearing under different rotating speed at 20 t"

转速/(r·min-1)失效率/%
10017.3
12017.8
14018.7
16019.7
18021.1
20022.2

Table 3

Dynamic pressure compensation rate under different rotating speed at 20 t"

转速/

(r·min-1)

Δh/mm
0.020.040.060.080.10
10010.5613.7816.8716.2915.21
12011.5016.3220.1921.1521.65
14011.7817.5421.9623.6124.82
16012.2918.6523.7725.8727.78
18014.0920.3326.4328.7031.01
20015.6722.6728.4931.9134.65

Fig.8

Flow field under Δh 0.06 mm at 180 r/min"

Fig.9

Relationbetween mass flow and rotation speeds at different oil wedge heights"

Fig.10

Experimental main device"

Fig.11

Schematic diagram of pressure sensor layout"

Fig.12

Pressure test values at different speeds of load 12 t"

1 陈燕生. 液体静压支承原理和设计[M]. 北京:国防工业出版社, 1980.
2 邵俊鹏, 张艳芹, 韩桂华, 等. 重型静压轴承油腔结构优化与流场仿真[J]. 系统仿真学报, 2010, 22(5): 1093-1096.
Shao Jun-peng, Zhang Yan-qin, Han Gui-hua, et al. Oil recess structure optimization and flow simulation for heavy hydrostatic bearing[J]. Journal of System Simulation, 2010, 22(5): 1093-1096.
3 张艳芹, 张志全, 冯雅楠, 等. 双矩形腔静压滑动轴承高速时的油膜润滑特性[J]. 摩擦学学报, 2018, 38(5): 609-618.
Zhang Yan-qin, Zhang Zhi-quan, Feng Ya-nan, et al. Lubrication characteristics of double rectangular cavity hydrostatic bearing at high speed[J]. Tribology, 2018, 38(5): 609-618.
4 张艳芹, 冯雅楠, 孔鹏睿. 基于热油携带的静压支承油膜温度场及试验[J]. 吉林大学学报: 工学版, 2019, 49(4): 1203-1211.
Zhang Yan-qin, Feng Ya-nan,Kong Peng-rui. Temperature field and experiment of hydrostatic bearing oil film based on hot oil carrying[J]. Journal of Jilin University (Engineering and Technology Edition), 2019, 49(4): 1203-1211.
5 Yadav S K, Sharma S C. Finite element analysis of tilted thrust pad bearings of various recesses shapes considering thrust pad flexibility[J]. Journal of Engineering Tribology, 2016, 230(1): 872-893.
6 尹文锋, 赵三星. 轴颈倾斜对稳态滑动轴承性能的影响[J]. 机械设计与制造, 2017(5): 26-29.
Yin Wen-feng,Zhao San-xing. Effect of misaligned journal on the performance of steady state bearing[J]. Mechanical Design and Manufacturing, 2017(5): 26-29.
7 江桂云, 王勇勤, 严兴春. 油膜轴承动静压混合效应的分析[J]. 机械设计, 2010, 27(7): 86-89.
Jiang Gui-yun, Wang Yong-qin, Yan Xing-chun. Analysis on hybrid hydrodynamic-static effect of oil film bearings[J]. Journal of Machine Design, 2010, 27(7): 86-89.
8 Sharma S C, Jain S, Bharuka D. Influence of recess shape on the performance of a capillary compensated circular thrust pad hydrostatic bearing[J]. Tribology International, 2002, 35(6): 347-356.
9 Rajasekhar N E, Sharma S C. Orifice compensated multirecess hydrostatic/hybrid journal bearing system of various geometric shapes of recess operating with micro polar lubricant[J]. Tribology International, 2011, 44(3): 284-296.
10 Guo L. Different geometric configurations research of high speed hybrid bearings[J]. Journal of Hunan University of Arts and Science (Natural Science Edition), 2013, 15(3): 40-43.
11 王禹, 王连吉, 王续跃. 液体静压推力轴承设计与FLUENT仿真分析[J]. 机械设计与制造, 2017, 9(58): 220-224.
Wang Yu, Wang Lian-ji, Wang Xu-yue. Design of hydrostatic thrust bearing and simulation analysis by fluent[J]. Machinery Design & Manufacture, 2017, 9(58): 220-224.
12 张耀满, 殷鑫贤. 数控车床的液体动静压轴承油膜压力特性[J]. 东北大学学报: 自然科学版, 2017, 38(5): 695-699.
Zhang Yao-man, Yin Xin-xian. Oil film pressure characteristics of liquid hybrid bearings in the CNC lathe[J]. Journal of Northeastern University (Natural Science), 2017, 38(5): 695-699.
13 Ettles C M, López G D, Borgna H. Optimized design of a large reversible thrust bearing[J]. Journal of Tribology, 2016, 138(4): 1701-1709.
14 Yu X D, Meng X L, Jiang H, et al. Research on lubrication performance of super heavy constant flow hydrostatic thrust bearing[J]. Advanced Science Letters, 2011, 4(8): 2738-2741.
15 Yu M, Yu X D. Influence of recess shape on comprehensive lubrication performance of high speed and heavy load hydrostatic thrust bearing[J]. Industrial Lubrication and Tribology, 2019, 71(2): 301-308.
16 于晓东, 付旭, 刘丹, 等. 环形腔多油垫静压推力轴承热变形[J]. 吉林大学学报: 工学版, 2015, 45(2): 460-465.
Yu Xiao-dong, Fu Xu, Liu Dan, et al. Thermal deformation of annular recess multi-pad hydrostatic thrust bearing[J]. Journal of Jilin University (Engineering and Technology Edition), 2015,45(2):460-465.
17 Su J C T, Lie K N. Rotation effects on hybrid hydrostatic/hydrodynamic journal bearings[J]. Industrial Lubrication and Tribology, 2014, 53(6): 261-269.
18 Korneev A, Li S B. Computation of pressure and temperature fields in lubricating layer of tapered hydrostatic dynamic bearings[J]. Bulletin of Bryansk State Technical University, 2017, 3(1): 12-24.
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