초록 ▼

A speed control system for a windmill having blades which can be feathered for altering speed and with the blades under the control of a mechanism which includes a piston assembly and a fluid governor associated therewith. Spring means are used to feather the blades against the force of the piston a

A speed control system for a windmill having blades which can be feathered for altering speed and with the blades under the control of a mechanism which includes a piston assembly and a fluid governor associated therewith. Spring means are used to feather the blades against the force of the piston assembly which is interconnected with the blades, and the speed of blade rotation actually creates the fluid pressure acting on the piston assembly and a governor is associated with the piston assembly for controlling the position of the piston and thus controlling the feathering of the blades, all according to the speed of rotation of the windmill blades. The windmill can be used for generating electric power, and fail-safe mechanisms are employed for protecting in the event of a windmill blade breakage.

대표청구항 ▼

A windmill control system comprising a plurality of rotatably mounted windmill blades having a common axis of rotation, said blades being pivotal about the respective longitudinal axis of each of said blades to alter the pitch of said blades, a rotatably mounted hollow shaft disposed on the rotation

A windmill control system comprising a plurality of rotatably mounted windmill blades having a common axis of rotation, said blades being pivotal about the respective longitudinal axis of each of said blades to alter the pitch of said blades, a rotatably mounted hollow shaft disposed on the rotational axis of said blades and being rotatable with said blades, a piston assembly movably disposed within said hollow shaft and movable in response to fluid pressure in said shaft for decreasing the pitch of said blades, a fluid pressure generating mechanism in driven relation with said shaft and generating fluid pressure on said piston assembly in response to the rotation of said blades, a fluid pressure governor operatively connected with said generating mechanism for decreasing the fluid pressure on said piston assembly according to the speed of rotation of said blades, control mechanism interconnected between said piston assembly and said blades for adjusting the pitch of said blades in response to the movement of said piston assembly, and an elastic member disposed within each of said blades and connected thereto and being operatively connected with said control mechanism and being disposed and operative to transmit the centrifugal force of said blades to said shaft and to counter the force of fluid pressure on said piston assembly and thereby increase the pitch of said blades when fluid pressure on said piston assembly is decreased.