WebKoehler - Tribology - High Frequency Reciprocating Rig (HFRR) For evaluation of the lubricity of diesel fuels using a high-frequency reciprocating rig (HFRR). A 2-mL test specimen of fuel is placed in the test reservoir and maintained at 25 or 60°C. When the temperature has stabilized, a vibrator arm holding a non-rotating steel ball and ... WebHigh Frequency Reciprocating Rig HFRR. For evaluation of the lubricity of diesel fuels using a high-frequency reciprocating rig (HFRR). A 2-mL test specimen of fuel is placed in the test reservoir and maintained at 25 or 60°C. When the temperature has stabilized, a vibrator arm holding a non-rotating steel ball and loaded with a 200-g mass is ...
Stribeck Curves In Reciprocating Test Bruker
Web24 de jul. de 2024 · There are many standard test methods to determine lubricity, however the most common and perhaps the most effective is the High Frequency Reciprocating … WebThe High Frequency Reciprocating Rig (HFRR) was also developed in the 1990s to make it useful for evaluating diesel fuel lubricity. It can produce a wide range of wear mechanisms depending on the fuel being tested. … chunky legged coffee table
Standard Test Method for Evaluating Lubricity of Diesel Fuels by …
WebI tested over 100 different oil formulations on a High Frequency Reciprocating Rig (HFRR) to model valvetrain contacts and obtain a … WebIn such a high-frequency reciprocating rig (HFRR), the 30 Hz conditions give an average velocity of 0.42 m/sec and a maximum at mid-stroke of 0.59 m/sec, high enough to reach the hydrodynamic lubrication regime. A standard cylindrical steel dowel pin (9.5 mm diameter x 15.5 mm long, ... WebHigh Frequency Reciprocating Rig. The HFRR apparatus is based on a steel ball which is loaded against a stationary steel plate. From: Tribology and Interface Engineering … determination of the gas exchange phenology