Class / Patent application number | Description | Number of patent applications / Date published |
416153000 | Having pitch lock or adjustable stop | 31 |
20080292462 | Device for the adjustment of the pitch of a motor blade of a wind turbine - A device is provided for the adjustment of the pitch of a rotor blade of a wind turbine. The device includes a pitch actuator and a fixing device. The pitch actuator includes a tube. The fixing device includes a first and a second ring-like element, each of which is arranged at the tube and each of which is supported towards a respective stopper assigned to the tube, and a clamping means which press the first and the second ring-like element in such a way towards the respective stopper that the fixing device and the tube are substantially non-relocatable relatively to each other. | 11-27-2008 |
20090028709 | Adjustable fan and method - An adjustable fan includes a hub having a receiving surface and a fan blade having a base abutting the receiving surface of the hub. A plurality of keyways may be positioned in at least one of the receiving surface and the base. A key may extend between the base and the receiving surface and into at least one of the plurality of keyways in order to retain the fan blade in a desired orientation relative to the hub. | 01-29-2009 |
20100202884 | Device for locking a rotor blade of a wind turbine - A device for locking a rotor blade of a wind turbine which has an adjustment system for the blade pitch angle of the rotor blade, wherein the adjustment system has a drive which features a motor and a gearbox with an input shaft that bears an external toothing, characterised by a locking pin rotatably mounted around its longitudinal axis, which engages with the external toothing in a locking position, and releases the external toothing in an unlocked position, wherein the locking pin has an end portion whose free end stands eccentric to the longitudinal axis of the locking pin. | 08-12-2010 |
20100290909 | DEVICE TO ADJUST THE PITCH ANGLE OF PROPELLER BLADES FOR A MODEL ENGINE - A device for adjusting the pitch angle of propeller blades for a model engine including at least one rotor, the blades extending radially on the surface of the rotor to form a propeller. It includes a tool-holder including a base designed to be fixed to a part of the outside of the engine housing and an upper part, the aforementioned upper part being fitted with means of support movable horizontally along a longitudinal axis (XX′), the aforementioned axis being parallel to the main axis of the model engine, contactless means of optical measurement, the aforementioned means of measurement being mounted on the movable means of support by using means of travel in rotation around an axis of rotation, the aforementioned axis of rotation being the blade's axis of rotation. | 11-18-2010 |
20110110779 | FLUID TURBINE FEATURING ARTICULATED BLADES AND PHASE-ADJUSTED CAM - A fluid turbine comprising a rotor, having an axis of rotation, comprising at least two rotor blades disposed at a radius from the axis of rotation, each rotor blade having a pitch axis and a variable pitch angle. The fluid turbine comprises a mechanism operable to control the pitch angle of at least one rotor blade about its pitch axis and to vary the pitch angle of the rotor blade between various pitch angles as the blade moves radially about the axis of rotation of the rotor. | 05-12-2011 |
20110164980 | PROPELLER ASSEMBLY PITCH CHANGE APPARATUS - A pitch change apparatus is provided for a propeller assembly having a row of propeller blades which rotate around an axis of the assembly. The apparatus has a unison ring which is coaxial with the propeller assembly. The unison ring is movable to drive respective mechanisms for varying the pitch of the blades. The apparatus further has a plurality of pitch lock assemblies circumferentially distributed around the unison ring. Each pitch lock assembly has a free state which allows movement of the unison ring and a locked state which prevents or limits movement of the unison ring and thus prevents or limits variation of the pitch of the blades. The pitch lock assembly moves from the free to the locked state when the assembly receives a signal to lock the blades. | 07-07-2011 |
20110286845 | HYDRAULIC ACTUATOR LOCKING DEVICE - A hydraulic lock system includes a spring pack defined between a female spring support and a male spring support, the spring pack includes a multiple of serrated washers, each of which defines an inner diameter which is greater than a diameter of the actuator rod and an outer diameter greater than an inner diameter of the cylinder. | 11-24-2011 |
20120009066 | DRIVE DEVICE FOR A WIND TURBINE - A driving device for a rotor blade of a wind turbine has an asynchronous machine ( | 01-12-2012 |
20120148411 | PITCH GEAR - A system for a wind turbine rotor blade, the system includes a pitch system that has a pitch bearing and a wind turbine hub, the bearing being attached to the hub and being attachable to a wind turbine rotor blade, and also including a pitch gear coupled to the pitch system. The pitch gear includes a first discrete segment and one or more other discrete segments, each segment having a plurality of teeth for engaging with and actuator such as a pinion. At least the first segment is held in place by releasable fasteners and extends along the pitch gear by a predetermined amount. The predetermined amount that the first segment extends along the pitch gear is determined based on anticipated wear of the pitch gear. | 06-14-2012 |
20120156039 | ELECTRIC GENERATOR DISPOSED ON A ROTATING TURBOPROP PART - An electrical energy generating device for a propfan-type aircraft propulsion unit rotor. The propulsion unit includes a turbomachine that drives in rotation at least one rotor including a plurality of blades arranged around an annular crown moving with the blades, which forms with its outer wall part of an outer envelope of the propulsion unit, the outer envelope being subjected to atmospheric conditions outside the propulsion unit. The turbomachine generates a flow of hot gases that exit via an annular hot vein, which is concentric with the moving annular crown, and defined for part of its surface by an inner wall of the moving annular crown, and includes, within the moving annular part, a mechanism to transform thermal energy into electrical energy, preferably by thermal diodes. Such a device, as an example, can find application to a device for controlling a pitch of rotors of a propfan-type propulsion unit. | 06-21-2012 |
20120219421 | CONTROL SYSTEM FOR A WIND TURBINE - The present invention relates to a control system for a wind turbine, comprising an electrical device that is arranged for being used during normal operation of a wind turbine and a power source that is arranged to be used as an emergency power supply to a blade pitch motor, wherein the blade pitch motor is arranged to test at least one property of said power source. The invention also relates to a method for testing a power source. | 08-30-2012 |
20130039767 | BLADE ASSEMBLY FOR A MOBILE WIND TURBINE - A folding blade assembly for a mobile wind turbine system is disclosed that includes a hub configured to be coupled to a generator and a blade coupled to the hub with a movable joint. The movable joint includes a first member coupled to the hub and including an aperture, a second member coupled to the blade and including an aperture, and a pin extending through the apertures of the first and second members such that the second member is movable relative to the first member about the pin. The movable joint further includes a lock coupled to the first member and the second member and having an engaged position and a disengaged position, where the second member is movable relative to the first member when the lock is in the disengaged position. | 02-14-2013 |
20130142653 | VARIABLE-PITCH PROPELLER OR REPELLER - In the case of a variable-pitch propeller or repeller according to the invention, the pitch-adjusting device is arranged in the hub and formed in such a way that it allows only a numerically limited number of different blade pitches, preferably just two blade pitches, for which purpose the pitch-adjusting device comprises an electrical drive device, for moving the blades from a first blade pitch to a second of the numerically limited number of blade pitches, and an electrically actuable locking device, for locking the blades in the numerically limited number of different blade pitches. | 06-06-2013 |
20130177423 | Wind Turbine Rotor With Pitch Brake - Wind turbine rotor comprising a hub, a plurality of blades, and at least one pitch system for rotating a blade substantially along its longitudinal axis and comprising one or more pitch brakes, wherein a pitch brake comprises at least a brake disc element and a first brake pad, and wherein one of the hub and a blade comprises said brake disc element and the other of the hub and blade comprises said first brake pad, the brake disc element and brake pad being arranged such that when the blade is substantially in or near the below rated so pitch position the brake disc element and pad are in frictional contact with each other. | 07-11-2013 |
20130330191 | BLADE PITCH ANGLE ADJUSTING APPARATUS FOR A WIND TURBINE - A wind turbine blade pitch angle adjusting apparatus for adjusting the pitch angle of a blade of a wind turbine is provided. The apparatus includes an electric pitch motor able to output a maximum motor torque Tm and a pitch brake assembly able to generate a maximum brake assembly torque Tb. The pitch brake assembly includes a plurality of individual pitch brakes each able to generate a maximum individual brake torque Tsb, the maximum brake assembly torque Tb is the sum of all maximum individual brake torques Tsb, and the maximum motor torque Tm is higher than the maximum individual brake torque Tsb of any one of the pitch brakes. | 12-12-2013 |
20140127018 | WIND TURBINE ROTOR AND METHOD OF ASSEMBLY THEREOF - Wind turbine rotor comprising a hub, a plurality of blades, at least one pitch system for rotating a blade substantially along its longitudinal axis and at least one pitch retention system, wherein a pitch retention system comprises a cam profile and a cam follower, and one of the hub and a blade comprises said cam profile and the other of the hub and blade comprises said cam follower, and wherein the cam follower comprises a pushing member and a contact member, wherein the pushing member is arranged to push the contact member towards the cam profile, and the cam profile comprises a local depression, and wherein the cam follower and cam profile are arranged such that when the blade is in a pitch position at or below nominal wind speed, the contact member can be retained in said local depression. | 05-08-2014 |
20140193261 | HYDRAULIC SYSTEM FOR CONTROLLING THE ORIENTATION OF FAN BLADES - A hydraulic system for controlling orientation of fan blades in a turbine engine including at least one set of adjustable pitch fan blades actuated by actuators that are connected to a hydraulic pump, and a small pitch protection valve controlled by an associated solenoid valve to make it possible on the ground, when the orientation of the blades is substantially perpendicular to the axis of the turbine engine, to pass from a first operating zone in which a speed of pitch variation of the blades is low to a second operating zone in which a speed of pitch variation is considerably higher, wherein operating pressure of the hydraulic pump is controlled by the solenoid valve controlling the small pitch protection valve to define two outlet levels corresponding to the two operating zones. | 07-10-2014 |
20150050149 | PROPELLER PITCHLOCK SYSTEM WITH A ROTATING INTERFACE - A pitchlock system includes a ballscrew screw mounted along an axis of rotation of an actuator, the ballscrew screw has an internal ballscrew bore; a pitchlock nut mounted about the ballscrew screw, the pitchlock nut including an internal pitchlock nut thread; a ballscrew ballnut mounted about the ballscrew screw and axially adjacent the pitchlock nut; a pitchlock actuation rod mounted axially within the internal ballscrew bore, the pitchlock actuation rod having an internal pitchlock actuation bore and a ball bearing aperture for receiving multiple ball bearings; a pitchlock retainer pin mounted axially within the internal pitchlock actuation bore; and a belleville spring which biases the ballscrew screw towards an axially fixed surface of the actuator in a pitchlock position, the ballscrew screw being movable between an operational position and the pitchlock position. | 02-19-2015 |
20150321749 | SYSTEM - Unison ring system includes first unison ring portion, second unison ring portion, and bearing. Second unison ring portion is co-axial with first unison ring portion. First unison ring portion includes first unison ring and first bearing location portion and second unison ring portion includes second unison ring and second bearing location portion. First bearing location portion is co-axial with first unison ring and projects axially from first unison ring, while second bearing location portion is co-axial with second unison ring and projects axially from second unison ring. First bearing location portion includes outwardly opening groove, and second bearing location portion includes inwardly opening groove. First unison ring portion and second unison ring portion positioned with first bearing location portion being concentric with second bearing location portion defining annular cavity there between. Bearing is accommodated in annular cavity, with axial length of annular cavity being greater than axial length of bearing. | 11-12-2015 |
20150361818 | ASSEMBLY - A unison ring assembly comprises a backing plate, and a plurality of pocket-forming portions. The backing plate is formed as an annular disc, with the annular disc being planar in a radial plane of the unison ring assembly. The plurality of pocket-forming portions are equi-spaced circumferentially around the axis of the unison ring assembly, and each of the plurality of pocket-forming portions is attached to the backing plate to form a corresponding radially extending pocket. | 12-17-2015 |
20150369213 | CONTROL DEVICE FOR A YAW SYSTEM OF A WIND POWER PLANT - A control device for a yaw system of a wind turbine, of the type having a supporting structure and a machine support rotatably mounted on the supporting structure for rotation about a yaw axis, includes at least one adjusting device connected between the supporting structure and the machine support of the wind turbine. The at least one adjusting device includes a drivetrain having a drive element and a gear mechanism and at least one yaw brake operable to selectively rotationally fix the machine support on the supporting structure. The yaw brake engages between the drive element and the gear mechanism of the drive train of the adjusting device. | 12-24-2015 |
20160195059 | Water Wheel Device And Control Mechanism Therefor | 07-07-2016 |
416154000 | Fluid motor for impeller adjustment | 9 |
20080219846 | Apparatus for Hydraulically Adjusting the Blades of an Impeller of an Axial-Flow Fan - An apparatus for hydraulically adjusting the blades of an impeller of an axial-flow fan, comprising an adjustment cylinder that on both sides of a piston displaceably disposed in the cylinder has a first chamber and a second chamber respectively provided with a connection to control oil lines connected to four-way valves. Not only a feed line leading to one of the control oil lines, but also a return line connected to the other control oil line, is each divided into two parallel branch lines. Two redundant four-way valves are provided, each being disposed in one of the parallel branch lines. Disposed in each branch line of each control oil line, between the respective connection and the respective four-way valve, is a seat valve that closes by spring force. | 09-11-2008 |
20110002786 | REMOTE PITCH CONTROLLER FOR A VARIABLE PITCH PROPELLER - A system for adjusting the pitch of a variable pitch propeller has a hub assembly, a valve assembly, and a fluid supply assembly. The hub assembly comprises a hub rotatably driven by a propeller shaft, an actuator connected to the hub, and a plurality of propeller blades connected to the actuator with at least one mechanical connection. The valve assembly is in fluid communication with the valve assembly and the actuator. The fluid supply assembly comprises a valve control mechanism that is isolated from the valve assembly and the hub assembly. The valve control mechanism provides a variable hydraulic pressure control signal to the valve assembly, which transfers fluid to the actuator as a function of the variable hydraulic pressure control signal. Based on the fluid pressure in the actuator, the pitch of the propeller blades is adjusted. | 01-06-2011 |
20110142646 | PASSIVE CYCLIC PITCH CONTROL - A blade pitch control mechanism for a propeller assembly ( | 06-16-2011 |
20120003095 | LINK PIN EXCHANGING DEVICE FOR WIND TURBINE GENERATOR AND LINK PIN EXCHANGING METHOD - A link pin exchanging device for a wind turbine generator that can efficiently carry out exchange of the link pin in the rotor hub, and a link pin exchanging method. The link pin exchanging device comprises an actuator for moving the link pin so that the link pin disengages from the link mechanism, and a reaction force receiving member for receiving a reaction force that acts on the actuator, independent from the wall surface of the rotor hub that intersects with the operating direction of the actuator. | 01-05-2012 |
20140154076 | DEVICE FOR SUPPLYING AND DISTRIBUTING FLUID - The device ( | 06-05-2014 |
20140369836 | TURBINE WITH HYDRAULIC VARIABLE PITCH SYSTEM - A variable pitch system for a water or wind turbine includes a hydraulic system that includes a first hydraulic system and a second, redundant hydraulic system that are completely contained in a nose region of the turbine. The first and second hydraulic systems can each be used during operation on a predetermined operating schedule. In addition, each of the first and second hydraulic systems can also include a pressure relief valve to limit back pressure on the hydraulic system from dynamic loads on the turbine blades. The pitch of all the blades are changed simultaneously using a common linear to rotary actuating mechanism. To aid in cooling, the hydraulic reservoirs for the first and second hydraulic systems can be attached to the front wall of the nose housing, and fins can be provided on the exterior of the nose housing at the front end to enhance heat extraction. | 12-18-2014 |
20140369837 | TURBINE FOR A HYDROELECTRIC POWER PLANT AND HYDROELECTRIC POWER PLANT - There is provided a turbine for a hydroelectric power plant comprising a hub, a plurality of turbine blades provided on the hub, a pitch angle adjusting unit coupled to the turbine blades for adjusting the pitch angle of the turbine blades, a double-acting hydraulic cylinder and a piston rod connected thereto. The piston rod is coupled to the pitch angle adjusting unit in such a way that the pitch angle adjusting unit performs a rotational movement when the piston rod is moved in the longitudinal direction. The double-acting hydraulic cylinder is provided in a hydraulic chamber coupled by way of a first and a second hydraulic line so that the double-acting hydraulic cylinder is displaceable by feed of a hydraulic fluid through the first or second hydraulic line and thus leads to adjustment of the pitch angle of the turbine blades by way of the coupling to the piston rod and the pitch angle adjusting unit. | 12-18-2014 |
20160061185 | HYDRAULIC SYSTEM - A hydraulic system is provided including, at least one hydraulic actuator, a distribution means in fluid communication with the at least one hydraulic actuator for selectively distributing hydraulic fluid to and from the at least one hydraulic actuator, at least one source of hydraulic fluid in fluid communication with the distribution means for supplying hydraulic fluid to the at least one hydraulic actuator, or for draining away hydraulic fluid from the at least one hydraulic actuator, a control means communicating with the at least one source for controlling pressurizing of the hydraulic fluid into the at least one actuator, or the draining away of the hydraulic fluid from the at least one actuator. Further, a pitch control system for a wind turbine and a method for operating a hydraulic system are also provided. | 03-03-2016 |
20160201638 | BLADE FOR A RUNNER UNIT | 07-14-2016 |