Abstract
Background: While the CNC (Computerised Numerical Control) machine spindle is driving the tool to cut the workpiece, impurities such as cutting fluid splash, metal chips, or metal dust tend to enter the internal system of the spindle. Optimization of the spindle sealing design can significantly improve the durability of the motorized spindle. A high-speed motorized spindle is the primary heat source of CNC machine tools. Under current conditions, a cooling and lubrication system is the main measure to control the heat of a high-speed motorized spindle.
Objectives: This paper introduces the current research progress in bearing lubrication and new spindle sealing structures.
Methods: The research on bearing lubrication is sorted by comparing the relevant literature on bearing lubrication; some sealing structures are introduced by giving examples of patents on motorized spindle seals.
Results: This paper reviews the bearing lubrication research and spindle sealing structure and provides an outlook on the future development of bearing lubrication technology and spindle sealing structure.
Conclusion: The High-speed motorized spindle is the primary heat source of CNC machine tools. Bearing lubrication can effectively control the motorized spindle heat; a motorized spindle sealing structure can prevent impurities from causing damage to the internal parts of the spindle and improve the service life of the motorized spindle.
Graphical Abstract
[1]
X.L. Peng, and Z. Li, "Review of spindle motor technology", Dianzi Celiang Jishu, vol. 43, pp. 1-7, 2020.
[2]
G. Shan, W.T. Shan, and X.Q. Rui, "A summary of key technology research on motorized spindle", Peak Data Sci., vol. 06, pp. 103-105+111, 2017.
[3]
Y. E. Zhao, and M. Y. Wang, "Introduction to the development of high-speed electric spindle technology", J. Henan Sci. Technol., pp. 111-115, 2013.
[4]
S. Ma, H.J. San, Z.H. Wu, H.W. Zhang, and Q. Lei, "Overview of high-speed electric spindle technology", Machinery, vol. 52, pp. 16-19, 2014.
[5]
L.W. Ao, Overview of modern high-speed spindles for machine tools., Plant Maintenance Engineering, 2015, pp. 66-70.
[6]
Y.E. Zhao, M.Y. Wang, and Q.B. Liu, Status of research on key technologies for high-speed precision electric spindles., Technology Wind, 2013, p. 73.
[7]
E. Abele, Y. Altintas, and C. Brecher, "Machine tool spindle units", CIRP Ann., vol. 59, no. 2, pp. 781-802, 2010.
[http://dx.doi.org/10.1016/j.cirp.2010.05.002]
[http://dx.doi.org/10.1016/j.cirp.2010.05.002]
[8]
S.H. Xiao, B.L. Zhang, and Y.J. Chen, Study on the key technologies of high-speed motorized spindle.. Modular Machine Tool & Automatic Manufacturing Technique, 1999, pp. 7-12.
[9]
D.S. Zhou, H.B. Lin, and Y.B. Chen, Current status and development trend of high-speed electric spindle structure., Metal Working, 2011, pp. 11-13.
[10]
X. Liu, X. Yang, W. Liu, H. Liu, and L. Zeng, "A review of hydrostatic bearing: research and analysis", Recent Pat. Eng., vol. 16, no. 3, p. e220621194200, 2022.
[http://dx.doi.org/10.2174/1872212115666210622144420]
[http://dx.doi.org/10.2174/1872212115666210622144420]
[11]
S.Y. Jiang, and S.W. Zhang, "Progress in the key technologies of high-speed motorized spindle supported by water-lubricated bearings", Machine Des. Manufactur. Eng., vol. 45, pp. 11-17, 2016.
[12]
D.P. Yan, Y.H. Wu, and K. Zhang, Research on oil-air lubrication system of high-speed electric spindle., Mechanical Engineering & Automation, 2006, pp. 37-39.
[13]
L.X. Yang, and S.S. Li, Oil-gas lubrication for high-speed spindle bearings and its application., Bearing, 2003, pp. 23-25.
[14]
L. Wu, Lubrication and cooling on roller motor spindle system of high-speed milling machine., Lubrication Engineering, 2004, pp. 112-113.
[15]
C.D. Sun, "Analysis of grease flow and thermal characteristics in grease lubricated high-Speed angular contact ball bearing cavity", M.S. thesis, Harbin Institute of Technology, Harbin, China, 2018.
[17]
Y.C. Bai, "Study on vibration characteristics of grease-lubricated bearings used in high-speed spindle", M.S. thesis, Harbin Institute of Technology, 2015. Harbin, China
[18]
J. Wang, Z.Y. Wu, and X. Chen, Application of oil mist lubrication system., Chemical Enterprise Management, 2014, p. 115.
[19]
X.K. Wang, Study on air flow field and cooling seal effect of highspeed motorized spindle. M.S. thesis, Shenyang Jianzhu University, Shenyang, China, 2018.
[20]
T. Hao, The experimental study of oil-air lubrication for high-speed motorized spindle bearing, M.S. thesis, Harbin Institute of Technology, Harbin, China, 2016.
[21]
X.L. Wang, C.L. Gui, T.B. Zhu, and H.F. Liang, "Study on rheological parameters of domestic lubricating grease", Tribology, vol. 27, pp. 41-46, 1997.
[22]
E. Kuhn, "Investigations into the degradation of the structure of lubricating greases", Tribol. Trans., vol. 41, no. 2, pp. 247-250, 1998.
[http://dx.doi.org/10.1080/10402009808983745]
[http://dx.doi.org/10.1080/10402009808983745]
[23]
J. Xu, N. Xu, X.B. Wang, and W.M. Liu, "Rheology of lithium greases under iced water and room air", Tribology, vol. 33, pp. 406-412, 2013.
[24]
J.S. Chen, X.C. Guo, T. Li, Y.C. Liu, and M.J. Jiang, "Relationship between rheological properties of lubricating grease and bearing vibration value", Acta Petrol. Sin., vol. 29, pp. 674-680, 2013.
[25]
W. G. Zhou, X. C. Guo, M. J. Jiang, and W. Q. Guo, "Rheological of lithium lubricating grease based on poly-αolefins oil", J. Logist. Eng. Univ., vol. 30, pp. 34-39+60, 2014.
[26]
S.Y. Poon, "An experimental study of grease in elastohydrodynamic lubrication", J. Lubr. Technol., vol. 94, no. 1, pp. 27-34, 1972.
[http://dx.doi.org/10.1115/1.3451631]
[http://dx.doi.org/10.1115/1.3451631]
[27]
F.Z. Zheng, and F. Xie, "The formation and structure analysis of lubricating oil film", Synth. Lubr., vol. 28, pp. 24-27, 2001.
[28]
I. Couronné, P. Vergne, D. Mazuyer, N. Truong-Dinh, and D. Girodin, "Effects of grease composition and structure on film thickness in rolling contact", Tribol. Trans., vol. 46, no. 1, pp. 31-36, 2003.
[http://dx.doi.org/10.1080/10402000308982596]
[http://dx.doi.org/10.1080/10402000308982596]
[29]
L.C. Zhao, J.J. Ma, C.Q. Ma, and Z.R. Qiu, "Effect of lubrication on the vibration characteristics of ball bearings", Tribology, vol. 23, pp. 421-425, 2003.
[30]
T. Itagaki, H. Ohta, and T. Igarashib, "Effect of grease type on abnormal vibration of ball bearing", J. Sound Vibrat., vol. 268, no. 5, pp. 933-946, 2003.
[http://dx.doi.org/10.1016/S0022-460X(03)00132-9]
[http://dx.doi.org/10.1016/S0022-460X(03)00132-9]
[31]
B.J. Wu, Q.L. Liu, X.L. Li, and Y.S. Zhou, Affect of dynamic oil-separation ability of grease on bearing vibration characteristics., Bearing, 2003, pp. 27-30.
[32]
T. Yoshioka, S. Simizu, and H. Shimoda, "A new form of rolling contact damage in grease-lubricated, deep-groove ball bearings", Tribol. Trans., vol. 53, no. 1, pp. 154-160, 2009.
[http://dx.doi.org/10.1080/10402000903420761]
[http://dx.doi.org/10.1080/10402000903420761]
[33]
Z.Q. Yu, and Z.G. Yang, "Fatigue failure analysis of a grease-lubricated roller bearing from an electric motor", J. Fail. Anal. Prev., vol. 11, no. 2, pp. 158-166, 2011.
[http://dx.doi.org/10.1007/s11668-010-9422-z]
[http://dx.doi.org/10.1007/s11668-010-9422-z]
[34]
D. Koulocheris, A. Stathis, T. Costopoulos, and D. Tsantiotis, "Experimental study of the impact of grease particle contaminants on wear and fatigue life of ball bearings", Eng. Fail. Anal., vol. 39, pp. 164-180, 2014.
[http://dx.doi.org/10.1016/j.engfailanal.2014.01.016]
[http://dx.doi.org/10.1016/j.engfailanal.2014.01.016]
[35]
C.L. Peng, C. Wang, and M. Mei, Effects of surface dent on film characteristic of point contact under grease lubricated., Machinery Design & Manufacture, 2016, pp. 73-75.
[36]
Y.S. Shen, "Thermal characteristics analysis and modeling technology research of high-speed motorized spindle", M.S. thesis, Nanjing University of Aeronautics and Astronautics, Nanjing, China, 2020.
[37]
S.Y. Yu, "Prediction of operating environment quality of Motorized spindle based on oil-air lubrication", 2018 .M.S. thesis, Shenyang Jianzhu University, Shenyang, China, 2018.
[38]
T. Liu, "Design and experimental research of motorized spindle cooling and lubricating system, 2016",
[39]
H.W. Ma, On a test system for rolling-element bearings by air-oil lubrication, M.S. thesis, Qingdao University of Technology, Qingdao, China, 2018.,
[40]
Z. Wang, Analysis of oil-air lubrication two-phase heat flow coupling characteristics of high-speed angular contact ball bearing., M.S. thesis, Lanzhou University of Technology, Lanzhou, China, 2020.,
[41]
M. Tsutsumi, and K. Tada, "Development of high-speed spindle for machine tools by means of intermittent oil-mist lubrication", Trans. Jpn. Soc. Mech. Eng. C, vol. 60, no. 577, pp. 2911-2916, 1994.
[http://dx.doi.org/10.1299/kikaic.60.2911]
[http://dx.doi.org/10.1299/kikaic.60.2911]
[42]
S. Lancy, A. Kemble, and N. Itoh, "Performance characteristics of fixed preload large bore angular contact ball bearings for machine tools", Mot. Contr., vol. 2, pp. 36-42, 1997.
[43]
S. Jiang, and H. Mao, "Investigation of the high-speed rolling bearing temperature rise with oil-air lubrication", J. Tribol., vol. 133, no. 2, p. 021101, 2011.
[http://dx.doi.org/10.1115/1.4003501]
[http://dx.doi.org/10.1115/1.4003501]
[44]
M.B. Wang, and R.H. Wang, "Numerical simulation on fluid-particle two-phase jet flow field in nozzle", J. China Univ. Petr., vol. 29, pp. 46-49, 2005.
[45]
Y.P. Zhang, "CAE analysis and study of the nozzle, M.S. thesis, Wuhan University of Technology, Wuhan, China, 2007",
[46]
Q. Zeng, J. Zhang, J. Hong, and C. Liu, "A comparative study on simulation and experiment of oil-air lubrication unit for high speed bearing", Ind. Lubr. Tribol., vol. 68, no. 3, pp. 325-335, 2016.
[http://dx.doi.org/10.1108/ILT-05-2015-0066]
[http://dx.doi.org/10.1108/ILT-05-2015-0066]
[47]
Y. He, W. D. Wang, Z. Y. Zhang, and J. Li, "Novel flow guide type oil-gas lubrication nozzle", CN213686175U, 2013.
[48]
X.M. Huang, B.L. Zhang, and S.H. Xiao, "FEA of thermal properties for high-speed motorized spindle", Aeronautical Manufacturing Technology, pp. 20-23+26, 2003.
[49]
C.H. Wu, and Y.T. Kung, "A parametric study on oil/air lubrication of a high-speed spindle", Precis. Eng., vol. 29, no. 2, pp. 162-167, 2005.
[http://dx.doi.org/10.1016/j.precisioneng.2004.06.005]
[http://dx.doi.org/10.1016/j.precisioneng.2004.06.005]
[50]
S.S. Li, P. Zhou, X. Huang, B. Chen, and J. Chen, "Experimental study of the lubricating performances for electric spindle bearings running in ultra high-speed lubricated by oil-air", Lubr. Eng., vol. 36, pp. 25-28+44, 2011.
[51]
L. Ma, H.R. Yang, and X.W. Sun, ""Oil-air lubrication method of spindle bearing in special CNC milling machine", Mech. Eng. Auto., pp. 185-186+189, 2014.
[52]
C.Y. Chen, J.S. Li, Y.J. Yu, and Y.J. Xue, "Study on temperature rise characteristics of high-speed angular contact ball bearings in oil-air lubrication", Mach.Des. Manuf., pp. 216-221+227, 2021.
[53]
Z.R.J. Wang, Analysis of two-phase flow and coupled heat transfer of high speed ball bearing under race lubrication, M.S. thesis, Harbin Engineering University. Harbin, China, 2020.,
[54]
E. V. Zaretsky, F. T. Schuller, and H. H. Coe, "Lubrication and performance of high-speed rolling-element bearings", In: Meeting of the American Society of Lubrications Engineers, No. NASA-TM-86958, 1985.
[55]
Y. Shoda, S. Ijuin, H. Aramaki, H. Yui, and K. Toma, "The performance of a hybrid ceramic ball bearing under high-speed conditions with the under-race lubrication method", Tribol. Trans., vol. 40, no. 4, pp. 676-684, 1997.
[http://dx.doi.org/10.1080/10402009708983708]
[http://dx.doi.org/10.1080/10402009708983708]
[56]
D.R. Ashmore, E.J. Williams, and S. McWilliam, "Hydrodynamic support and dynamic response for an inner-piloted bearing cage", Proc. Inst. Mech. Eng. Part G J. Aerosp. Eng., vol. 217, no. 1, pp. 19-28, 2003.
[http://dx.doi.org/10.1243/095441003763031806]
[http://dx.doi.org/10.1243/095441003763031806]
[57]
D. D. Xu, J. H. Zhang, and S. P. Guo, "Breaking oil test for bearings with oil supply under raceway", Bearing, pp. 26-27, 2005.
[58]
W.B. Zhu, X.B. Zhang, Y.S. Lu, and D.L. Wang, "Numerical study for influence of lubrication methods on lubrication performance of ball bearing", J. Propul. Technol., vol. 40, pp. 892-901, 2019.
[59]
X.P. Li, Y.J. Xue, D.H. Si, S.F. Jiang, and X.Q. Ma, Study on the temperature rise of angular contact ball bearings under ring lubrication., Modular Machine Tool & Automatic Manufacturing Technique, 2019, pp. 40-43.
[61]
Z. Liu, and Q. Zhao, "Seal structure and electric main shaft of electricity main shaft", CN208289003U, 2015.
[63]
F. Wu, S. C. Yi, and Y. W. Zhang, "Multi-layer labyrinth groove type sealing structure of electric spindle", CN210623570U, 2014.
[64]
Z. L. Wang, S. W. Wang, W. Gu, Z. M. Shen, and J. Chen, "Electric spindle sealing structure", CN209511119U, 2019.
[65]
J. B. Han, Z. B. Yang, P. J. Zhang, Y. B. Yang, and L. J. Yin, "Oil mist lubrication electric spindle front end bearing sealing structure", CN209586961U, 2009.
[66]
C. H. Yang, "Sealing structure of motorized spindle front bearing chamber", CN210949878U, 2020.
[67]
D. Q. Huang, W. H. Huang, and Y. J. Miao, "Electric spindle labyrinth seal water throwing structure", CN210046009U, 2020.
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