A lift fan position lock mechanism is disclosed. In various embodiments, a position lock mechanism includes a ring structure having a first surface, the ring structure including one or more detents defined in the first surface of the ring structure. For each detent, the lock mechanism includes a sta
A lift fan position lock mechanism is disclosed. In various embodiments, a position lock mechanism includes a ring structure having a first surface, the ring structure including one or more detents defined in the first surface of the ring structure. For each detent, the lock mechanism includes a stationary magnet coupled fixedly to the ring structure at a location adjacent to the detent. The lock mechanism further includes a rotating magnet assembly comprising a magnet of opposite magnetic polarity to at least one of the stationary magnets and a mechanical stop structure of a size and shape to fit into a corresponding detent and engage mechanically with a surface defining at least one extent of said corresponding detent when the rotating magnet assembly is in a locked position.
대표청구항▼
1. A rotor lock mechanism, comprising: a ring structure having a first surface, the ring structure including one or more detents defined in the first surface of the ring structure;for each detent, a stationary magnet coupled fixedly to the ring structure at a location adjacent to the detent; anda ro
1. A rotor lock mechanism, comprising: a ring structure having a first surface, the ring structure including one or more detents defined in the first surface of the ring structure;for each detent, a stationary magnet coupled fixedly to the ring structure at a location adjacent to the detent; anda rotating magnet assembly comprising a magnet of opposite magnetic polarity to at least one of the stationary magnets and a mechanical stop structure of a size and shape to fit into a corresponding detent and engage mechanically with a surface defining at least one extent of said corresponding detent when the rotating magnet assembly is in a locked position;wherein the stationary magnet is mounted on a tab extending inward from an inner edge of the ring structure. 2. The rotor lock mechanism of claim 1, wherein the rotating magnet assembly is configured to be attached directly or indirectly to a rotor and the ring structure is configured to be attached to a structure that does not rotate. 3. The rotor lock mechanism of claim 1, wherein said rotor lock mechanism includes a plurality of stationary magnets, including a first subset having a first magnetic polarity and a second subset having a second magnetic polarity opposite to the first magnetic polarity. 4. The rotor lock mechanism of claim 1, wherein the rotating magnet assembly includes a spring configured to apply a spring force in a direction associated with the locked position. 5. The rotor lock mechanism of claim 1, wherein the rotating magnet assembly is attached to a rotating element of an aircraft lift fan and the ring structure is attached fixedly to a non-rotating element of the aircraft lift fan. 6. The rotor lock mechanism of claim 5, wherein the aircraft lift fan is operated under control of a control module. 7. The rotor lock mechanism of claim 6, wherein the control module comprises a processor configured to perform an unlock sequence to transition the aircraft lift fan from a locked state in which the rotor lock mechanism is in a locked position to an unlocked state in which the rotor lock mechanism is not in the locked position. 8. The rotor lock mechanism of claim 7, wherein performing the unlock sequence includes applying a torque that is equal to or greater than a break free torque associated with the rotor lock mechanism. 9. The rotor lock mechanism of claim 6, wherein the control module comprises a processor configured to perform a lock sequence to transition the aircraft lift fan from an unlocked state in which the rotor lock mechanism is not in a locked position to a locked state in which the rotor lock mechanism is in the locked position. 10. The rotor lock mechanism of claim 9, wherein the performing the lock sequence includes causing the rotating element to rotate through one or more revolutions under a torque that is less than a break free torque associated with the rotor lock mechanism. 11. The rotor lock mechanism of claim 10, wherein the performing the lock sequence includes estimating an angular position of the rotating element. 12. The rotor lock mechanism of claim 1, wherein the ring comprises one or more of an axis symmetric ring; a substantially flat ring; and a conical annulus. 13. A rotor lock mechanism, comprising: a ring structure having a first surface, the ring structure including one or more detents defined in the first surface of the ring structure;for each detent, a stationary magnet coupled fixedly to the ring structure at a location adjacent to the detent; anda rotating magnet assembly comprising a magnet of opposite magnetic polarity to at least one of the stationary magnets and a mechanical stop structure of a size and shape to fit into a corresponding detent and engage mechanically with a surface defining at least one extent of said corresponding detent when the rotating magnet assembly is in a locked position;wherein the mechanical stop structure comprises a substantially cylindrical element extending beyond a plane associated with the magnet comprising the rotating magnet assembly. 14. The rotor lock mechanism of claim 13, wherein a longitudinal axis of said substantially cylindrical element is oriented at an acute angle to said plane associated with the magnet comprising the rotating magnet assembly. 15. The rotor lock mechanism of claim 13, wherein the detent comprises a v-shaped notch in said first surface of the ring structure. 16. A rotor lock mechanism, comprising: a ring structure having a first surface, the ring structure including one or more detents defined in the first surface of the ring structure;for each detent, a stationary magnet coupled fixedly to the ring structure at a location adjacent to the detent; anda rotating magnet assembly comprising a magnet of opposite magnetic polarity to at least one of the stationary magnets and a mechanical stop structure of a size and shape to fit into a corresponding detent and engage mechanically with a surface defining at least one extent of said corresponding detent when the rotating magnet assembly is in a locked position; andfurther comprising an insert set into said detent, the insert being made of a first material that is harder that a second material of which the ring structure is made. 17. A rotor lock mechanism, comprising: a ring structure having a first surface, the ring structure including one or more detents defined in the first surface of the ring structure;for each detent, a stationary magnet coupled fixedly to the ring structure at a location adjacent to the detent; anda rotating magnet assembly comprising a magnet of opposite magnetic polarity to at least one of the stationary magnets and a mechanical stop structure of a size and shape to fit into a corresponding detent and engage mechanically with a surface defining at least one extent of said corresponding detent when the rotating magnet assembly is in a locked position;wherein the rotating magnet assembly is configured to be attached fixedly to a rotor via a base structure with respect to which at least a portion of the rotating magnet assembly that includes the magnet and the mechanical stop structure is connected via a pin or other axially oriented structure in a manner such that at least said portion remains free to rotate about an axis associated with the pin or other axially oriented structure. 18. The rotor lock mechanism of claim 17, wherein a center of mass of said portion of the rotating magnet assembly is substantially aligned with said axis in a plane substantially parallel to a plane of said ring structure when the rotating magnet assembly is in the locked position. 19. The rotor lock mechanism of claim 18, wherein the center of mass of said portion of the rotating magnet assembly is located at a non-zero distance d from said plane substantially parallel to said plane of said ring structure when the rotating magnet assembly is in an unlocked position in which the mechanical stop structure is no longer in said detent.
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이 특허에 인용된 특허 (6)
Salyer, Ival O., Aircraft using turbo-electric hybrid propulsion system for multi-mode operation.
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