Design and application on experimental platform for high-speed bearing with grease lubrication

He Qiang,Pan Benliu,Li Anling,Shen Yuan,Li Zeqiang,Li Lili

doi:10.1177/1687814015618640

Abstract

The experimental platform for high-speed grease is an important tool for research and development of high-speed motorized spindle with grease lubrication. In this article, the experimental platform for high-speed grease is designed and manufactured which consists of the drive system, the test portion, the loading system, the lubrication system, the control system, and so on. In the meantime, the high-speed angular contact ceramic ball bearings B7005C/HQ1P4 as the research object are tested and contrasted in the grease lubrication and oil mist lubrication. The experimental platform performance is validated by contrast experiment, and the high-speed lubricated bearing performance is also studied especially in the relationship among the rotating speed,load and temperature rise. The results show that the experimental platform works steadily, accurate, and reliable in the experimental testing. And the grease lubrication ceramic ball bearings B7005C/HQ1P4 can be used in high-speed motorized spindle in the circular water cooling conditions when the rotating speed is lower than 40,000 r/min or the DN value (the value of the bearing diameter times the rotating speed) is lower than the 1.44 × 106 mm r/min. Grease lubrication instead of oil mist lubrication under high-speed rotating will simplify the structure design of the high-speed motorized spindle and reduce the pollution to the environment.

Highlights

With the development of computer numerical control (CNC) machine tools to high-speed, high-precision, high-efficiency, and environmental-friendly, the requirements in spindle speed and reliability are increasing.[1,2] High-speed bearing is the key component of motorized spindle, whose performance will directly affect the stand or fall of motorized spindle performance, that is, tool’s accuracy, part surface quality, production efficiency, vibration, and noise of the machine
The main ways of bearing lubrication are grease lubrication, oil mist lubrication, and oil air lubrication; the bearings of high-speed motorized spindle are used for the oil mist lubrication which is preferred for bearing to high speed, and it is simple to replace the lubricating oil, but it is complex to design the channels of oil lubrication
The bearings with grease lubrication can save oil mist lubrication system’s required tank, pump, tubing, and transmission parts; the lubricating system is greatly simplified, and it has the advantages of small volume, light weight, and little pollution

Summary

Introduction

With the development of computer numerical control (CNC) machine tools to high-speed, high-precision, high-efficiency, and environmental-friendly, the requirements in spindle speed and reliability are increasing.[1,2] High-speed bearing is the key component of motorized spindle, whose performance will directly affect the stand or fall of motorized spindle performance, that is, tool’s accuracy, part surface quality, production efficiency, vibration, and noise of the machine. Higher requirements for the performance and operating life of high-speed spindle are put forward for designing high-speed bearing. The main ways of bearing lubrication are grease lubrication, oil mist lubrication, and oil air lubrication; the bearings of high-speed motorized spindle are used for the oil mist lubrication which is preferred for bearing to high speed, and it is simple to replace the lubricating oil, but it is complex to design the channels of oil lubrication. Usually the bearing uses grease lubrication only in low speed. It needs a experimental platform to test and verify the speed limit of the grease lubricated bearing

Methods

Results

Conclusion