Trelleborg Antivibration Solutions’ Post

#QuickTake: Why is tip speed one of the criteria used for propeller cavitation? Damaging and noisy blade cavitation (known as "back cavitation") occurs on the suction side of the blade and is a function of thrust loading. High thrust leads to low pressure, and if this low pressure falls below the water’s vapor pressure, a cavitation vapor volume forms. (Some amount of cavitation always exists; it is the generation and collapse of a large cavitation volume is the real problem.) Tip speed is an indicator for the inception of "tip cavitation," which is fairly benign but is typically the first type of cavitation to appear. So, it serves as a useful threshold for the potential inception of the more damaging blade back cavitation. [Image courtesy of Australian Maritime College].

From memory, implementation of marine piles with a diameter of 2 m

Steady crosswinds on conductors at a 45° angle of attack create lift of the high voltage transmission line. When lift is greater than drag, conductors will become unstable and gallop vertically. Studies have shown that as little as 10° twist of a conductor wire can bring stability to an unstable span. AR dampers reduce predicted peak galloping of amplitudes by 52-72%. Need to solve galloping violations in your line design? Contact us for a no-cost analysis of your system. #galloping #antigalloping

Vibration can badly impact your INS performance. See below how to mitigate vibration in your #INS system.

How does #vibration affect your inertial navigation system (#INS)? Learn why platform vibration should be considered early in your design cycle and explore basic methods to measure & mitigate vibration in your #GNSS+INS system. Start reading >> https://hxgn.biz/3pCGTln

How does #vibration affect your inertial navigation system (#INS)? Learn why platform vibration should be considered early in your design cycle and explore basic methods to measure & mitigate vibration in your #GNSS+INS system. Start reading >> https://hxgn.biz/3pCGTln

How does #vibration affect your inertial navigation system (#INS)? Learn why platform vibration should be considered early in your design cycle and explore basic methods to measure & mitigate vibration in your #GNSS+INS system. Start reading >> https://hxgn.biz/3pCGTln

Proper alignment of a boat’s stern tube and propulsion shaft is crucial. If a stern tube is out of tolerance, excessive vibration will be present and can lead to failure of the tube system bearings, seals or possibly of the entire propulsion system. Get an optical alignment performed to decrease your chances of having a failure. ⚙️ #amesolutions1992 #boatalignment #yachtmaintenance #opticalalignment #boatlife #yachtservices #boatrepair #marineindustey

Centrifugal propeller In a normal propeller, the blade is perpendicular to the direction of rotation. The speed of the wing tip is limited by the speed of sound. However, the wing can be shaped in such a way that the profile of the wing is parallel to the radius. As the wing rotates, the viscosity tends to grab the air outside the wing with it, and the air leaves the wing's circumference at high speed. Suction is created from the center of the wing to the edges, and when the flow velocity is different on the upper and lower surface of the wing, lift is created. If the viscosity is not enough to move the air, the wing can be shaped with radial lamellas or air deflectors that compress the air into the flow. Would someone like to test the functionality of the concept in practice?

Particularly important for MEMS IMUs, though it should still be considered for FOG and RLG gyro IMUs.