40results about How to "Small offset" patented technology

A method of determining at least one rotation parameter of a wind turbine rotor rotating with a rotation speed and a phase is provided. The method comprises the steps of: measuring an effective centrifugal force acting in a first pre-determined direction, which is defined in a co-ordinate system rotating synchronously with the rotor, on at least one reference object located in or at the rotor, establishing a first angular frequency representing the rotation speed of the rotor on the basis of variations in the measured effective centrifugal force due to gravitational force, establishing a second angular frequency representing the rotation speed of the rotor by use of at least one yaw rate gyro, and establishing the value of the rotation speed as the rotational parameter by correcting the second angular frequency by comparing it to the first angular frequency.

The invention relates to a grinding mill. The grinding mill comprises a cylindrical rotating cylinder, a motor and a base. The grinding mill is characterized in that a material door is formed in the rotating cylinder; the width of the material door is consistent with that of the rotating cylinder; the material door can be overturned outwards relative to the rotating cylinder around a rotating shaft; a locking mechanism is arranged at a corresponding position of the material door and the rotating cylinder; a transmission gear is arranged on the side wall of the rotating cylinder; the motor drives the transmission gear for rotation through a transmission belt; bearings are connected to two sides of the rotating shaft of the rotating cylinder, and are respectively mounted in each bearing mounting ring; a limiting ring and an elastic plate are arranged in each bearing mounting ring; each limiting ring is located in the corresponding bearing mounting ring; a plurality of elastic plates adopt a semi-moon-shaped structure; each limiting ring and the corresponding bearing mounting ring are concentrically arranged; the elastic plates are respectively arranged in an annular region limited byeach limiting ring and the corresponding bearing mounting ring; the arc top of the semi-moon-shaped structure of each elastic plate is in top connection with the outer periphery of the correspondinglimiting ring, and fixation is realized through a corresponding connecting piece; two ends of the semi-moon-shaped structure of each elastic plate are connected with the corresponding bearing mountingring through one corresponding fixing piece; the elastic plates are used for enabling a shaft axis of the rotating shaft to be in reciprocating motion along an elastic mechanism; and the bearing mounting rings are fixed relative to the base, and are supported by the base.