Importance

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Abstract

An improved gear box assembly is provided for a vertical axis wind turbine, the vertical axis wind turbine having a rotor having a centrally disposed axis oriented in the vertical direction, a bull gear supporting the rotor, a base below the bull gear, the bull gear being adapted to rotate above the base, the bull gear and base presenting a hollow housing and shaft terminating in an inner end wall and end surface respectively, the housing for receiving the shaft, one of the said hollow housing or shaft being stationary and the other being rotatable with respect thereto and secured to the bull gear, the shaft and housing when secured together presenting a space between the inner end wall and end surface, bearings supported between the housing and shaft, and sealing means for sealing the space between the housing and shaft, a fluid passageway extending into the space created between the inner end wall and end surface for feeding hydraulic fluid under pressure into the space for hydraulically elevating the bull gear relative to the base, means precluding the gear from rising more than a predetermined or controlled distance, means for feeding the fluid under pressure to, and means for draining the fluid from, the space, and a reservoir for such fluid.

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First Claim