Non-magnetic Latching Servo Valve for Satellite Power Reduction
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Solution Overview
Problem
Current satellite latch valves using solenoids and magnets consume excessive power, generate unwanted magnetic fields, are heavy, and prone to defects, making them unsuitable for satellite applications.
Innovation Solution
A non-magnetic latching servo actuated valve utilizing a DC servomotor and lead screw assembly to control the valve stem, eliminating the need for magnetic fields and power to maintain positions, with a pressure relief shuttle assembly for venting and precise control, suitable for high-pressure and corrosive environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If solenoids and magnets are used to hold the valve in open or closed position, then the valve can maintain its position, but power consumption increases and magnetic fields are generated
Solution Approach 1:
The patent removes the solenoid and magnet components from the valve system entirely. Instead of using electromagnetic fields to hold the valve position, a mechanical latch mechanism is implemented that maintains position without requiring continuous power or generating magnetic fields, thus extracting the harmful electromagnetic elements while preserving the position-holding function.
Solution Approach 2:
The patent replaces the electromagnetic holding mechanism (solenoids and magnets) with a purely mechanical latch system. The mechanical latch uses physical interlocking components to maintain valve position without requiring electrical power, substituting electromagnetic fields with mechanical forces and geometries.
2Ease of operation
If solenoids and magnets are used in latch valves, then the valve can be controlled, but magnetic field output affects satellite guidance systems
Solution Approach 1:
The patent extracts and removes the magnetic field-generating components (solenoids and permanent magnets) from the valve system. The control function is achieved through a non-magnetic mechanical latch mechanism that operates without producing magnetic fields, thereby eliminating the harmful electromagnetic interference with satellite guidance systems while maintaining valve controllability.
Solution Approach 2:
The patent substitutes the electromagnetic control mechanism with a mechanical control system. The valve is controlled through a mechanical latch that can be engaged or disengaged without generating magnetic fields, replacing the electromagnetic actuation and control system with a non-magnetic mechanical alternative.
3Reliability
If permanent magnets are used in solenoid valves, then the valve can open and close and remain in position, but the magnetic fields increase weight and cause interference
Solution Approach 1:
The patent removes permanent magnets and all magnetic components from the valve assembly. Position stability is achieved through a mechanical latch mechanism that uses physical interlocking and friction rather than magnetic forces, extracting the heavy magnetic materials while maintaining the ability to hold the valve securely in its positioned state.
4Ease of manufacture
If traditional latch valves are used, then the valve can be constructed, but they are heavy and increase launch cost
Solution Approach 1:
The patent replaces the traditional heavy-duty mechanical components with a streamlined mechanical latch system that achieves the same function with reduced mass. The design substitutes bulky electromagnetic actuators and magnetic assemblies with a compact mechanical latch mechanism, maintaining constructability and reliability while significantly reducing the valve's weight to lower launch costs.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Reduces power consumption and magnetic interference, provides precise control, minimizes leakage, and extends operational lifespan while being lightweight and resistant to corrosive materials, making it suitable for satellite applications.
Implementation Method 1
The valve stem is advanced or retracted by the rotation of the lead screw
Implementation Method 2
the shuttle assembly moves in response to a pressure differential between the inlet and the outlet
Data Source
AI summary
A non-magnetic latching servo actuated valve under the control of a controller comprising a motor in rotational communication with a lead screw. The lead screw advances or retracts a valve stem connected to a valve stem cap. The valve stem cap has a valve stem cap passage. A valve end cap having a valve seat is provided and receives the valve stem cap such that the valve stem cap can contact the valve seat. A pressure relief device or shuttle assembly is positioned internal to the valve stem cap. The shuttle assembly is used for venting build-up downstream pressure through the non-magnetic latching servo actuated valve outlet, through the valve stem cap passage, around the shuttle assembly, through passages, into a pressure chamber, and to the nonmagnetic latching servo actuated valve exit where the fluid vents until the system is in balance.