Abstract
Background: Lubrication failure has always been a concern in the research of heavy hydrostatic
bearings. A preliminary study found that under a certain working condition, the heavy hydrostatic
bearing will appear in the condition of zero local flow of oil film, which is called a critical lubrication
state. It produces a significant thermal accumulation effect and affects the lubrication performance of
the bearing.
Objective: This paper takes Q1-205 double rectangular cavity hydrostatic thrust bearing as the research
object and adopts the research method combining theoretical analysis, simulation, and experimental test
to analyze the temperature rise and characteristics of the bearing when it is in critical lubrication state
under different working conditions.
Methods: The finite volume method is used to simulate the critical lubrication state under the condition
of common load and rotating speed, and the corresponding operating parameters of the critical lubrication
of heavy static support are obtained.
Results: It is found that when the oil film is in the critical lubrication state, the low temperature zone is
concentrated at the bearing position of the oil film, while the high temperature zone is concentrated at
the counter-current side sealing edge.
Conclusion: The oil film's local temperature rise is intensified, and the heat accumulation phenomenon
is serious because the heat cannot be taken away in time.
Keywords:
Heavy hydrostatic bearing, critical lubrication, oil film, countercurrent side, temperature rise, operating parameters.
[1]
Li X, Ying H, Ming L, Tian C. Influences on temperature field of a vertical lathe hydrostatic thrust bearing by structural dimension of oil cushion. Machine Tool Hydraulics 2016; 44(21): 128-31.
[3]
Heng F. Thermal characteristics analysis and optimization of hydrostatic turntable for heavy CNC vertical lathe. Phd Thesis, University of Electronic Science and Technology of China 2015.
[4]
Li M, Chen Q, Qiu H. Thermal character analysis of conical hydrostatic bearing. Machin Des Manufact 2014; 4(43): 137-9.
[5]
Liu Z, Zhao D, Wang Y, Hun L, Zhao Y, Dong X. Relationship between bearing capacity of heavy machine hydrostatic rotary table and temperature field distribution of oil pad. J Jilin Univ 2018; 48(03): 773-80.
[6]
Zhang T, Wang Y, Wang L, Xu C. Study on critical temperature of water-lubricated hybrid journal bearings. Lubricat Eng 2017; 42(10): 62-9.
[7]
Yu X, Sun D, Wu X, Sui J, Dan L. High speed and heavy load characteristic on oil film thickness of annular recess multi-pad hydrostatic thrust bearing. J Propul Technol 2016; 37(7): 1350-5.
[8]
Yu X-D, Zhan S-W, Fei H. Deformation of friction pairs of static and dynamic pressure hybrid bearing with tilting oil pad. Gongcheng Lixue 2021; 38(01): 241-8.
[9]
Guo C, Yi C. Coupled thermal analysis of multi-physical field of hydrostatic bearing in precision grinding machine. Modular Machine Tool Automat Manufact Tech 2016; (5): 18-21.
[10]
Zhao C, Ping M, Gong C, Xing N. Research on characteristics of the high precision hydrostatic spindle system base on one-way fluid-solid interaction. Lubricat Eng 2014; 39(5): 62-8.
[11]
Zhi H, Xun L, Wang L, Wang Z, Heng F. Thermal characteristics analysis of the spindle system of heavy duty horizontal lathe. J Univ Electron Sci Technol China 2016; 45(6): 1020-6.
[12]
Ying Huang, Hua Gao, Zhang Chaoqun, Liu Yinfeng, Li Xibin. Optimization and simulation of cooling structure based on temperature induced deformation increasing of hydrostatic bearing. Hot Working Technol 2018; (16): 169-172+175.
[14]
Dewang C, Qian D, Bin W. Temperature field simulation of herringbone grooved bearing based on FLUENT software-Advanced Information Management, Communicates, Electronic & Automation Control Conference. IEEE 2017.
[15]
Masaki Yakabe, Shigeru Ohtsuka, Takeshi Gonda. Measurement of oil film thickness in an oil impregnated porous sintered bearing with ultrasonic method. J Japan Society Design Eng 2017; 52(12)
[18]
Yu Xiaodong, Wu Guangpeng, Yu Wang, Zhou Wenkai. Calculation method of eccentric load bearing capacity of hydrostatic rotary table. Patent CN110069871B, 2022.
[19]
Yu Xiaodong, Yuan Tengfei, Li Daige, Hang Qu, Zheng Xuhang. Calculation method of convective heat transfer coefficient of hydrostatic bearing rotary table. Patent CN108256202B 2022.
Download PDF Flyer