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A SYSTEM, METHOD AND APPARATUS FOR REDUCING FRICTIONAL FORCES AND FOR COMPENSATING SHAPE MEMORY ALLOY-ACTUATED VALVES AND VALVE SYSTEMS AT HIGH TEMPERATURES
A SYSTEM, METHOD AND APPARATUS FOR REDUCING FRICTIONAL FORCES AND FOR COMPENSATING SHAPE MEMORY ALLOY-ACTUATED VALVES AND VALVE SYSTEMS AT HIGH TEMPERATURES
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机译:减小摩擦力并补偿高温形状记忆合金致动阀和阀系统的系统,方法和装置
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摘要
A valve system including a number of shape memory alloy (SMA)-actuated valves for controlling the flow of fluids is disclosed as is a variety of types of SMA-actuated valves and methods of operation. In one embodiment, a valve system includes a housing having a substantially closed cavity as well as a second port for communicating a fluid. Further, the valve system includes a first SMA actuator configured to control the position of the first seal to vary fluid flow through the firs port, and a first temperature compensator for adjusting the position of the seal by an amount proportional to temperature. A second SMA-actuated valve, driven by either a unidirectional or a bidirectional SMA actuator, controls the position of the second seal to vary fluid flow through the second port, and a second temperature compensator for adjusting the position of the second seal by another amount proportional to temperature.
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