A pressure relief system for a multi-cylinder heat engine, such as a multi-cylinder Stirling engine, having at least two essentially discrete working gas volumes which experience out of phase cyclical variations in pressure during operation of the engine, to reduce the likelihood of damage to the co
A pressure relief system for a multi-cylinder heat engine, such as a multi-cylinder Stirling engine, having at least two essentially discrete working gas volumes which experience out of phase cyclical variations in pressure during operation of the engine, to reduce the likelihood of damage to the components of the engine in the event of severe pressure imbalance conditions developing within the engine. A spool positioned within a cavity in a housing has a closed position and an open position. In the event of a severe pressure imbalance condition, the spool is moved to the open position, the working gas volumes are allowed to communicate and the engine is unloaded.
대표청구항▼
[ We claim:] [1.] A pressure relief system for a multi-cylinder heat engine, such as a multi-cylinder Stirling engine, having at least two essentially discrete working gas volumes which experience out of phase cyclical variations in pressure during operation of said engine, for equalizing the mean p
[ We claim:] [1.] A pressure relief system for a multi-cylinder heat engine, such as a multi-cylinder Stirling engine, having at least two essentially discrete working gas volumes which experience out of phase cyclical variations in pressure during operation of said engine, for equalizing the mean pressure within said working gas volumes and unloading said engine to reduce the likelihood of damage to the components of said engine in the event of severe pressure imbalance conditions within said engine, said pressure relief system comprising:housing means for defining a cavity,a spool positioned within said housing means cavity,said spool moveable between closed and open positions within said housing means cavity,wherein said spool and said housing means cavity cooperate in said closed position to form a plurality of isolated cavities, pressure in said isolated cavities acting to urge said spool to move toward said closed position, said spool and said housing means cavity further cooperating to define a buffer cavity, pressure in said buffer cavity acting to urge said spool to move toward said open position, and wherein when said spool is in said open position, said isolated cavities are vented together,first conduit means for connecting said working gas volumes to said buffer cavity, said first conduit means providing a resistance to working gas flow such that the mean pressures in each of said working gas volumes equalizes though working gas flow between said working gas volumes and said buffer cavity is charged to the equalized mean pressures of said working gas volumes,second conduit means for connecting each of said working gas volumes with one of said isolated cavities formed by said housing means cavity and said spool when said spool is in said closed position, andwhereby when the forces acting on said spool urging said spool to move toward said dosed position exceed the forces acting on said spool urging said spool to move toward said open position, said spool remains in said closed position and said engine operates normally, and when said forces acting on said spool urging said spool to move toward said open position exceed said forces acting on said spool urging said spool to move toward said closed position, said spool moves to said open position, thereby venting together said isolated cavities, allowing said working gas volumes to communicate and unloading said engine.
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