Heat exchange – Regenerator – Checker brick structure
Patent
1975-05-19
1977-02-15
Burns, Wendell E.
Heat exchange
Regenerator
Checker brick structure
123 4169, 1563031, 165 51, 165 69, 188 1B, F02F 130
Patent
active
040077730
ABSTRACT:
A vibration dampener for an engine with cooling fins on its cylinders is an integrally formed resilient material member with a first portion having lug portions mountable on opposite sides of cooling fins and between adjacent cooling fins. The lug portions in their outer end portions are of reduced size relative their inner portions, and are wider in their inner end portions than the distance between the fins. Connected ends of the first portion traverse ends of the cooling fins. The vibration dampener is constructed and adapted to be mounted and held in place on an engine solely by friction with the lug-like portions compressed between cooling fins. It reduces the vibrating frequency to which the cooling fins on the cylinders can be forced by normal operation of the engine to prevent the engine from reaching a resonant frequency. A vibration dampening apparatus for a multi-cylinder air-cooled airplane engine has an intake manifold, a servo controlled variable pitch propeller and an engine driven hydraulic governor pump for the propeller servo. The apparatus includes the above resilient member mountable on the cooling fins of the cylinders, a hydraulic dampener connected with the hydraulic governor pump. The intake manifold is tuned to in normal operation of the engine provide a uniform intake manifold pressure distribution among the several cylinders. Resilient dampeners are provided for the propeller blades. A method of dampening the vibrations of a multicylinder aircraft engine having an intake manifold, cooling fins and a servo controlled variable pitch propeller powered by an engine driven hydraulic governor pump included providing resilient vibration dampeners on the cooling fins of the engine's cylinders, mounting resilient members on the blades of the propeller, and communicably connecting a hydraulic dampener with the outlet of the governor pump, and with the resulting tuning the intake manifold to provide an essentially uniform normal operating intake manifold pressure distribution. A method of dampening vibrations of cooling fins of an engine having on its cylinders includes providing a wedge-like member to temporarily spread the cooling fins, inserting a tooth of a comb-like resilient member between the spread fins and removing the wedge-like member to release the cooling fins so they will compressibly hold the resilient member.
REFERENCES:
patent: 2241209 (1941-05-01), Lea
patent: 2253025 (1941-08-01), Fedden
patent: 2455708 (1948-12-01), Sherwin
patent: 2581845 (1952-01-01), Elliott
patent: 2641024 (1953-06-01), Panagrossi
patent: 2771277 (1956-11-01), Cross
Burns Wendell E.
O'Connor Daniel J.
Widdowson John H.
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