고분자량 점도지수향상제가 첨가된 오일의 음향점도특성
Acoustic Viscosity Characteristics of Oils with High Molecular Weight VI Improver Additives
1
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
Oil viscosity is one of the important parameters for machinery condition monitoring. Basically, it is expressed as kinematic viscosity measured by capillary flow and dynamic or absolute viscosity measured by rotary shear viscometry. Recently, acoustic wave techniques appear in the market, measuring viscosity as the product of dynamic viscosity and density. For Newtonian fluids, knowledge of density allows conversion from one viscosity parameter to the other at a specific shear rate and temperature. In this work, oil samples with different chain lengths of viscosity index (VI) improvers and concentrations were examined by different viscometric techniques. Results showed that acoustic viscosity measurements give misleading results for oil samples with high molecular weight VI improvers and at low temperatures ≤ 40 C.
Abstract
Oil viscosity is one of the important parameters for machinery condition monitoring. Basically, it is expressed as kinematic viscosity measured by capillary flow and dynamic or absolute viscosity measured by rotary shear viscometry. Recently, acoustic wave techniques appear in the market, measuring viscosity as the product of dynamic viscosity and density. For Newtonian fluids, knowledge of density allows conversion from one viscosity parameter to the other at a specific shear rate and temperature. In this work, oil samples with different chain lengths of viscosity index (VI) improvers and concentrations were examined by different viscometric techniques. Results showed that acoustic viscosity measurements give misleading results for oil samples with high molecular weight VI improvers and at low temperatures ≤ 40 C.
참고문헌 (8)
- 공호성, "윤활관리기법을 이용한 설비상태진단 및 진단기술", 소음진동(Journal of kSNVE), 17(3), pp.26~30 (2007)
- 공호성, "기계 상태진단을 위한 인-라인형 오일 모니터링 스마트 센서", 한국윤활학회지, 24(3), pp.111~121 (2008), 한국윤활학회
- "ISO", DIS 14830-1, Condition Monitoring and Diagnostics of Machine - Tribology-based Monitoring and Diagnostics-, Part 1: General guidelines, 2001
- Hidekazu TAI, "Vibration-type Viscometer Using a Triangular Bimorph Transducer −measurement of high viscosity by low-frequency operation", Japanese J. of Applied Physics, 43(5B), pp.3088~3089 (2004)
- KEREM DURDAG, "Real-time Viscosity Measurement for Condition-based Monitoring Using Solid-state Viscosity Sensor", Tribology Transactions, 51, pp.296~302 (2008)
- "ViSmartTM Low Shear Bolt Viscosity Sensor Manual, published by SenGenuity", ~ (2009)
- "ASTM D 2270-04, Standard Practice for Calculating Viscosity Index from Kinematic Viscosity at 40 and 100oC", ~
- "ASTM D341-03, Standard Test Method for Viscosity- Temperature Charts for Liquid Petroleum Products", ~