| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 073455000 | Propeller, impeller, or fluid coupling | 15 |
| 20090090182 | MEASURING ROTOR IMBALANCE VIA BLADE CLEARANCE SENSORS - A system and method can be utilized to determine an out of balance condition of a rotor having a plurality of blades. The system monitors a clearance between the blades and an associated housing. By looking at a center of that clearance information, a determination can be made of the magnitude of imbalance of the rotor. | 04-09-2009 |
| 20090178480 | PROPELLER TUNER ASSEMBLY - One embodiment of a propeller tuner assembly formed in accordance with the present disclosure includes a frame and a bearing assembly having a coupler adapted to selectively couple a propeller to the frame. The coupler is selectively movable from a first position where at least a portion of the coupler is substantially isolated from tuning loads applied to the bearing assembly. | 07-16-2009 |
| 20090266160 | METHOD AND SYSTEM FOR DETERMINING AN IMBALANCE OF A WIND TURBINE ROTOR - A method and system of determining an imbalance of a wind turbine is provided. In accordance with one embodiment, there is provided a method for determining an imbalance of a rotor of a wind turbine, the wind turbine comprising a tower and a nacelle mounted to the top of the tower, the tower having a central axis extending through the nacelle, the nacelle having a front end and a rear end, the rotor being rotatably connected to the nacelle typically at the front end for rotating about a rotor axis and having a plurality of rotor blades, the rotation of the rotor about the rotor axis defining a rotor plane, the method comprising: positioning a first vibration sensor towards the central axis of the tower with its sensitive axis of the first vibration sensor substantially parallel to the rotor plane; measuring a first data set of vibration data using the first vibration sensor over a first sampling period; and determining a counterweight for at least one blade in the rotor in accordance with the first data set of vibration data when a mass imbalance in the rotor exists. | 10-29-2009 |
| 20100170339 | Method for balancing radical projections detached from a rotating assembly - The invention discloses an improved method and apparatus to statically equalize the span wise and chord wise moments of a detached plurality of radial projections. These detached radial projections are associated with a rotating assembly and constitute the majority of its rotating mass. When installed on the rotating assembly, the balanced radial projections will necessarily produce a center of rotating mass approximately concentric with its axis of rotation, thereby minimizing vibrations associated with its rotation. The method to statically equalize the span wise moments of the radial projections comprises first determining the span wise moment by finding the center of gravity and multiplying the distance from the center of gravity to the plane of attachment of the radial projection to the rotating assembly by its total weight. Once all of the span wise moments are known, all span wise moments are made equal to some preferred span wise moment by the addition or subtraction of corrective weight at a corrective distance on the respective radial projections. The method to statically equalize the chord wise moment of the radial projections comprises first establishing the center of gravity of the radial projection and measuring the chord wise moment about a preferred longitudinal axis. Once all of the chord wise moments are known at the center of gravity, all chord wise moments made equal to some preferred chord wise moment by the addition or subtraction of weight on the chord wise axis at the center of gravity of the radial projection. By extension of this method, both span wise and chord wise moment profiles and weight distribution profiles can be made of respective radial projections and compared to a reference profile of parameters. | 07-08-2010 |
| 20100288045 | MEASURING ROTOR IMBALANCE VIA BLADE CLEARANCE SENSORS - A system and method can be utilized to determine an out of balance condition of a rotor having a plurality of blades. The system monitors a clearance between the blades and an associated housing. By looking at a center of that clearance information, a determination can be made of the magnitude of imbalance of the rotor. | 11-18-2010 |
| 20100294038 | METHOD FOR PREDICTING IMBALANCE OF A PROPELLER SHAFT ASSEMBLY - A method for determining an imbalance of a propeller shaft assembly can include establishing balancing planes relative to certain areas of the propeller shaft assembly and identifying each component of the propeller shaft assembly that could have a potential imbalance condition due to a tolerance variation. The method can also include determining the potential imbalance condition for each identified component, and determining a contribution of each determined potential imbalance condition to a respective pair of the established balancing planes. The method can further include determining a total magnitude of imbalance at the respective pair of established balancing planes based on the determined contributions of each potential imbalance condition, and determining a statistically representative value of the determined magnitude of imbalance. | 11-25-2010 |
| 20110314909 | METHOD FOR PREDICTING INITIAL UNBALANCE IN A COMPONENT - A method for predicting initial unbalance in a component comprising one or more elements, the method comprising: defining a statistical distribution of a mass moment weight of each of the one or more elements; restricting the statistical distribution to a selected range; and calculating an initial unbalance of the component for the restricted distribution of the one or more elements. | 12-29-2011 |
| 20120055247 | METHOD AND SYSTEM FOR DETECTING AN UNUSUAL OPERATIONAL CONDITION OF A WIND TURBINE - A method for detecting an unusual operational condition of a wind turbine is provided. The method includes measuring an actual imbalance of a rotor of said wind turbine, determining an imbalance deviation of the measured actual imbalance from an imbalance reference, and evaluating whether the imbalance deviation is above a predetermined imbalance threshold value. | 03-08-2012 |
| 20120186343 | Method for balancing a rotor mounted on a hub of a wind turbine - It is described a method for balancing a rotor mounted on a hub of a wind turbine. The method includes measuring a parameter value of a parameter being indicative of the revolution frequency components of the rotor and/or of a generator of the wind turbine during operation of the wind turbine, calculating a change of the spatial mass distribution of the rotor based on the parameter value of the parameter, which change is needed for balancing the rotor, and balancing the spatial mass distribution of the rotor by using at least one balancing weight element being attachable to at least one blade of the rotor based on the calculated change of the spatial mass distribution. It is further described a system for balancing a rotor, a wind turbine, a computer program and a computer-readable medium, which are all adapted for carrying out the above described balancing method. | 07-26-2012 |
| 20140150550 | METHOD AND SYSTEM FOR INTEGRATING GAS TURBINE TRIM BALANCING SYSTEM INTO ELECTRONIC ENGINE CONTROLS - Methods and systems for determining a rebalancing strategy for trim balancing one or more rotational components of a gas turbine. One or more noise, acoustics or vibrational signals may be received at a control device of an aircraft comprising the gas turbine engine while the aircraft is in operation. The one or more noise, acoustics or vibrational signals may be used for determining a rebalancing strategy for one or more unbalanced rotational components. | 06-05-2014 |
| 20140298905 | VERIFICATION OF MAGNETIC BALANCE FOR MAGNETICALLY LEVITATED IMPELLER - The magnetic balance is verified of a magnetically-levitated impeller of a centrifugal pump with a pump housing having levitation magnets. The impeller includes embedded magnets and is movable within a chamber in the pump housing between first and second sides of the chamber. The centrifugal pump is mounted on an acceleration fixture while the impeller is held against a predetermined one of the first and second sides by the levitation magnets. A plurality of predetermined accelerations are applied to the acceleration fixture to exert a plurality of different forces of acceleration on the impeller. A determination is made whether the impeller detaches from the predetermined side as a result of each different force of acceleration to identify adjacent forces for which a transition occurs between detaching and not detaching. The transition is compared with a desired retention force to determine whether the pump achieves magnetic balance. | 10-09-2014 |
| 20150096370 | SYSTEMS AND METHODS FOR DETERMINING ROTARY BLADE TRACK AND BALANCE ADJUSTMENTS - A method of adjusting a rotary blade includes receiving performance data for a rotary blade, receiving an adjustment constraint for the rotary blade, defining an adjustment space for alternative adjustment solutions for the rotary blade including a plurality of alternative adjustment solutions, and calculating expected performance for one of the plurality of alternative adjustment solutions. Based on the expected performance of the one of the plurality of alternative adjustment solutions, the method determines whether to calculate expected performance for another of the plurality of alternative adjustment solutions. | 04-09-2015 |
| 20150355044 | System and Method for Protecting Rotary Machines - The present disclosure is directed to a system and method for protecting a rotary machine in a high noise environment. In one embodiment, the method includes a step of measuring a vibration signal during operation of the rotary machine. Another step includes modulating the vibration signal at a desired frequency to generate a modulated signal having a direct current (DC) value. The desired frequency varies as a function of an operational parameter of the rotary machine. The method also includes a step of filtering the modulated signal via one or more low-pass filters. Another step includes comparing an amplitude of the filtered signal to a threshold amplitude for one or more components of the rotary machine. The threshold amplitude is indicative of an imbalance within one or more components of the rotary machine. The rotary machine is then operated based on the comparison so as to protect the rotary machine from damage caused by the imbalance within the one or more components of the rotary machine. | 12-10-2015 |
| 20190145381 | METHOD AND SYSTEM FOR DETECTING A MASS IMBALANCE IN A WIND TURBINE ROTOR | 05-16-2019 |
| 073456000 | Single blade balancing | 1 |
| 20100242598 | Arrangement to Determine a Static Moment of a Blade - A root-end of the blade is connectable to a fixation unit which is pivotably mounted around a first reference-point. A first static moment of the fixation unit without the blade connected is determined in reference to a first reference-point, while the first static-moment is acting on the fixation-unit at the first distance. A second static-moment of the fixation unit and the connected blade is determined at a second distance in reference to the first reference-point, while the second distance is allocated to a cross-section of the blade. The first and the second static-moment are used to calculate the static-moment of the blade. | 09-30-2010 |
