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자료유형
학술저널
저자정보
저널정보
대한기계학회 Journal of Mechanical Science and Technology Journal of Mechanical Science and Technology Vol.20 No.3
발행연도
2006.3
수록면
358 - 365 (8page)

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초록· 키워드

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The hydraulic pump of an Electro-hydrostatic Actuator should be able to quickly feed large volume of oil into hydraulic cylinder in order to reduce the response time. On the other hand, it should be also able to precisely dispense small amount of oil through low-speed operation so that the steady state position control error of the actuator can be accurately compensated. Within the scope of axial piston type hydraulic pumps, this paper is focused on the investigation how the surface treatment of their cylinder barrel with TiN plasma coating can contribute to the reduction of the friction and were rate of valve plate in the low-speed range with mixed lubrication. The results showed that the friction torque of the valve plate mated with a TiN-coated cylinder barrel could reduced to 22% of that with an uncoated original one when load pressure was 300 var and rotational speed 100 rpm. It means that the torque efficiency of the test pump was expected to increase more than 1.3% under the same working condition. At the same time, the wear rate of the valve plate could be reduced to 40~50%.

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Abstract

Nomenclature

1. Introduction

2. Important Factors of Friction Torque Acting on Valve Plate

3. Experimental Comparison of Friction Coefficient and Wear Rate

4. Effect of PVD-Coating on Friction Torque

5. Conclusions

References

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