134 results about "Weather vane" patented technology

A gravity type variable-length seabed single-point mooring connecting device of a floating fan comprises a floating body with at least two pulley fairlead devices, a single-point anchor arranged on the seabed and connected with a rotatable device, and at least one weight located in water below the floating body. Wherein the heavy block is connected with the single-point anchor through a mooring rope passing through the pulley fair lead. The offshore mooring system is small in seabed coverage area, environment-friendly, high in mooring system efficiency, safer, more reliable, practical and feasible, has a wind indicator function, and can be used for offshore mooring positioning of the floating type wind power platform with the water depth ranging from 50 m to 300 m or even larger than 1500 m.

The invention provides an outdoor comprehensive distribution box capable of enhancing heat dissipation, which belongs to the technical field of distribution boxes and comprises a distribution box body, a heat exchange mechanism, a cooling mechanism and an air cooling mechanism. Wherein the heat exchange mechanism is arranged on the power distribution box body and comprises a plurality of heat dissipation fins which are all arranged at the top of the power distribution box body; the cooling mechanism is arranged at the top of the power distribution box body, the cooling mechanism comprises a rotating cover which is rotatably connected with the power distribution box body, and a plurality of heat dissipation fins are accommodated in the rotating cover; the wind indicator is arranged on the rotating cover, and the wind indicator can adjust the direction of the rotating cover according to the wind coming direction; and the air cooling mechanism is arranged at the top of the power distribution box body, penetrates through the rotating cover, comprises a plurality of fan blades and is arranged on the opposite side of the wind indicator, and the fan blades can rotate by utilizing natural wind and transmit power into the power distribution box. The device can adapt to different wind coming directions of natural wind, efficient heat dissipation is achieved, and the probability that dust makes contact with electronic elements can be reduced.

A wind chime device includes a base that is vertically elongated and is substantially foraminous to pass sound and air through the base. A chime unit is removably insertable into the base and the chime unit includes a barrel and a comb. The comb including a plurality of bristles and the barrel has a plurality of knobs to pluck respective ones of the plurality of bristles when the barrel is rotated to produce a melody. A wind vane is removably attachable to the chime unit and the wind vane is positioned above the base such that the wind vane is exposed to wind. The wind vane rotates the barrel of the chime unit when the wind vane is rotated thereby facilitating each of the plurality of knobs on the barrel to pluck the respective bristle on the comb to facilitate the chime unit to produce the melody.

Dust protection and heat dissipation device, characterized in that it a slat arrangement (100) comprising a frame (101), a rotating shaft being rotatably connected to the frame (101), a fixed slat (102) being fastened to the rotating shaft rotatably connected to the frame (101), the fixed slat (102) also being fixedly connected to a rotating shaft at the other end, and the fixed slat (102) being connected to a movable slat (103) by a rotating shaft, all movable slats (103) being connected to one another via a laterally attached cord, and the movable slats (103) each being provided with a T-shaped groove on one side, and a dust protection assembly (200) arranged on one side of the louvre assembly (100), the dust protection assembly (200) comprising a mounting bracket (201) fixed to the frame (101), the mounting bracket (201) being fixedly connected to a mounting box (201a), and the mounting bracket (201) providing fixed support for a deflection unit (202), an adjustment unit (203), and a wind vane (204), the deflection unit (202) and the adjustment unit (203) being arranged within the wind vane (204), and the deflection unit (202) being connected to the adjustment unit (203) via the wind vane (204).

To provide a door with wind direction plates that can operate wind direction plates collectively, and can set an angle of an upper wind direction plate and an angle of a lower wind direction plate to different angles.SOLUTION: An opening part 3 for passing air is formed vertically, and a plurality of wind direction plates 11 are arranged in the opening part 3 so as to be able to change the direction of an airflow in a vertical direction. The wind direction plate 11 is a horizontally long, band-like piece, right and left ends of the wind direction plate are supported by vertical frames 2a on the right and left of the opening part 3 to provide a horizontal rotational axis, one end of a support part is provided with a rotation linkage part 13 that engages with an engagement protrusion 14 of a rotation operation member 20 arranged along the vertical frame 2a. With predetermined operation of the rotation operation member 20, the wind direction plate 11 is rotated through the rotation linkage part 13 from a state in which the opening part 3 is closed to a state in which the opening part 3 is opened by a certain angle. There are multiple types of rotation linkage parts 13 that differ in a rotation angle of the wind direction plate 11.SELECTED DRAWING: Figure 2

The utility model discloses a wind direction measuring device for sports events, which belongs to the technical field of sports events and comprises a vertical rod, a first fixing block is arranged on the surface of the upper end of the vertical rod, a wind indicator is arranged on one side of the first fixing block, an indicating component is arranged on the other side of the first fixing block, and an auxiliary inserting structure is arranged on the surface of the lower end of the vertical rod. According to the wind direction indicator, the indicating assembly is arranged, the installation cylinder is installed on the surface of the vertical rod through the fixing ring, the length of the indicating rod is adjusted, the lower end of the indicating rod corresponds to the indicating ring in the installation cylinder, when wind drives the first fixing block to rotate, the indicating rod rotates, and the wind direction can be conveniently and accurately determined by observing the sculpture of the corresponding scale plate; the protective assembly is arranged, the protective barrel is fixed to the outer side of the disc through meshing of the outer threaded sleeve and the inner threaded plate, the pointed cone and the tip end of the auxiliary rod can be shielded, and therefore accidental injury to workers when the device moves can be avoided, and safety is high.

The utility model discloses a ventilating and rainproof structure for a charging pile box transformer in the technical field of charging pile box transformers, which comprises a supporting box body and a ventilating and rainproof shell, the upper plane of the supporting box body is rotatably connected and provided with a rotating disc, a fixed bottom plate seat is arranged below the ventilating and rainproof shell, and the rotating disc is connected with the ventilating and rainproof shell. The fixed bottom plate seat is fixedly installed on the rotating disc, a rotating shaft is fixedly arranged in the middle of the lower portion of the rotating disc, a driven bevel gear is installed on the rotating shaft, a driving bevel gear is arranged on the side edge of the driven bevel gear in a meshed mode, and the driving bevel gear is installed on a main shaft of a motor. The ventilation rainproof shell is arranged on the outer side of the charging pile box transformer substation, the good rainproof protection performance is achieved, the supporting box body and the rotating disc are arranged below the ventilation rainproof shell, the wind indicator and the external temperature and humidity sensor are arranged on the top of the ventilation rainproof shell, and the ventilation rainproof shell is combined with the wind direction and the temperature and humidity conditions inside and outside the ventilation rainproof shell. And automatic rotation adjustment of the rotating disc can be realized.

The utility model discloses a static deviation correction device for a wind indicator, which comprises a protractor tool detachably connected to a cross beam, the protractor tool comprises a fixed seat connected with the cross beam, and the upper end face of the fixed seat is connected with a protractor mounting seat. The edge of one end of the upper plate surface of the protractor mounting seat is provided with a semicircular avoiding hole through which the vertical rod of the wind indicator passes, and the periphery of the avoiding hole is provided with a semicircular protractor; the pointer tool is detachably connected to the wind indicator vertical rod and comprises a pointer fixing block, the pointer fixing block comprises a first connecting block and a second connecting block, one end of the first connecting block is hinged to the second connecting block, and the other end of the first connecting block is connected with the second connecting block through a first fixing bolt; the bottom surface of the second connecting block is connected with a pointer, and the pointer vertically points to the scales on the protractor. Through the cooperation of the protractor tool and the pointer tool, the direction of the wind indicator can be corrected, and the installation precision of the wind indicator is further ensured.

The utility model discloses a meteorological station with a compact structure. The meteorological station comprises a supporting seat, a wind speed detection device and a wind direction detection device, the wind speed detection device comprises a first shaft, a wind rotating body, a wind speed sensor and a wind speed circuit board, the first shaft is provided with a vertically-through hollow area, the first shaft is arranged on the supporting seat, and the wind rotating body is arranged on the outer side of the first shaft in a sleeving mode; the wind direction detection device comprises a second shaft, a wind indicator, a wind direction sensor and a wind direction circuit board, the second shaft penetrates through the upper side and the lower side of the first shaft through the hollow area and can rotate relative to the first shaft, and the wind indicator is located above the wind rotating body and arranged at the upper end of the first shaft. The wind indicator can be stably supported above the wind rotating body, so that the measured wind speed and wind direction data are ensured to be very close to the same position, and the consistency and accuracy of the data are improved. The layout is more compact, and space is saved.

The utility model relates to the technical field of wind direction calibration of wind power generation, in particular to a cradle head adjusting executing mechanism suitable for wind direction calibration, which is composed of a wind indicator, a first vertical rod, a second vertical rod and a supporting mechanism which are sequentially connected from top to bottom. The first vertical rod is in transmission connection with the second vertical rod; the bottom end of the second vertical rod sequentially penetrates through a top plate, a sponge ring, a bearing and an inserting groove of the supporting mechanism. The bottom end of the second vertical rod is in sliding connection with the slot; and lubricating oil is added on the sponge ring. By arranging the supporting mechanism and the dustproof component, lubricating oil can be conveniently added to the surface of the second vertical rod, the second vertical rod and the inner wall of the inserting groove are lubricated, rotation between the second vertical rod and the inserting groove is facilitated, and sealing and dust prevention are conducted on the connecting position of the second vertical rod and the supporting mechanism through the dustproof cover and the top plate; external dust is prevented from entering the inner wall of the slot to be in contact with the bearing, the bearing is protected, and the service life of the bearing is prolonged.

The embodiment of the invention provides a wind indicator accurate positioning detection system and method. The system is applied to the field of wind direction detection equipment, and comprises a height calculation module used for obtaining real-time wind speed information and real-time environment information of a wind tunnel and a wind direction angle transmitted by a wind direction sensor, and inputting the information to a preset height confirmation model to obtain the rising height of a three-hole probe; the airflow deflection angle calculation module is used for controlling the three-hole probe to be adjusted to the rising height, receiving the differential pressure data transmitted by the three-hole probe, calculating a calibration coefficient according to the differential pressure data, and calculating an airflow deflection angle according to the calibration coefficient and a preset fitting formula; and the wind direction angle adjusting module is used for adjusting the wind direction angle transmitted by the wind direction sensor according to the airflow deflection angle and transmitting the adjusted wind direction angle to the control center. According to the scheme, the ideal rising height of the three-hole probe is determined, then measurement is carried out, measurement errors caused by improper height can be reduced, and the measurement precision of the airflow deflection angle and the wind direction angle is improved.

The invention discloses a field vector wind field monitoring device and a visualization method. The device comprises a wind receiving detection mechanism, a data acquisition sensor and a data processing system, the wind receiving detection mechanism comprises a mounting frame and a self-adaptive forward wind receiving assembly; the self-adaptive forward wind receiving assembly comprises rotating blades, a wind indicator and a self-adaptive adjusting ring, the self-adaptive adjusting ring comprises an outer ring, a middle ring and an inner ring, the outer ring is arranged on the mounting frame, the middle ring is connected to the interior of the outer ring through a vertical rotating shaft, and the inner ring is connected to the interior of the middle ring through an inner horizontal rotating shaft; the rotating blades are rotationally connected to the mounting part in the inner ring; the wind indicator is provided with a horizontal empennage and a vertical empennage. According to the monitoring device and the visualization method, the vector wind field in the field can be monitored in real time, the vector visualization interface is generated, the cost is low, and better data support is provided for adjustment of operation parameters of the plant protection unmanned aerial vehicle and manual spray supplementation.

The utility model discloses a wind speed vane with an improved structure, which comprises a support base, a rotary joint, an impeller and a vane, and is characterized in that the support base comprises a base vertical rod which is vertically arranged; the rotary joint comprises an upper joint sleeve and a lower joint sleeve, the upper joint sleeve and the lower joint sleeve are rotationally connected through a joint bearing, and the lower joint sleeve is arranged at the upper end of the base vertical rod in a sleeving mode; the wind speed vane with the improved structure further comprises a three-way pipe, the three-way pipe is provided with a front side pipe connector with a forward opening, a rear side pipe connector with a backward opening and a lower side pipe connector with a downward opening, and the three-way pipe is arranged at the upper end of the upper joint sleeve in a sleeving mode through the lower side pipe connector. A front connector is inserted into a front pipe connector of the three-way pipe in a sleeved mode, and the impeller is rotationally installed on the front connector. A rear connector is inserted into a rear pipe connector of the three-way pipe in a sleeved mode, and the wind indicator is installed on the rear connector. By means of the structural design, the LED lamp has the advantages of being novel in design, good in structural compactness and convenient to assemble.

The application discloses a mobile energy storage charging pile and relates to the technical field of charging piles. The mobile energy storage charging pile comprises a charging pile body and a cooling assembly. The back surface of the charging pile body is connected with an air inlet pipe. The cooling assembly comprises a drying box connected to the end of the air inlet pipe. The surface of the rotating carrier plate is provided with an air inlet hopper. When the charging pile body stops moving with the vehicle arriving at the destination and charging the new energy vehicle, the wind vane is rotated by the external natural wind, the opening of the air inlet hopper is always against the wind, the clean natural wind is collected by filtering through the filter screen, the natural wind is pre-cooled by the cooling liquid tank, and the dehumidification is carried out by the drying box. The low-temperature and dry natural wind enters the charging pile body to cool it. Compared with air cooling, the cooling effect of this mode is more obvious. Compared with water cooling, the cooling liquid tank and the charging pile body are separately arranged, liquid leakage into the charging pile body can be prevented, and the complexity of pipeline layout is avoided.

The present application relates to sand dust collection monitoring device field, specifically to a butterfly type sandstorm concentration level flux real-time dynamic collection monitoring device, including fixed protection cylinder, centrifugal sand dust inlet, rotating sand dust separation cylinder, wind sand separation pipe, wind sand separation exhaust pipe, exhaust pipe, high mesh exhaust dust screen, stainless steel conical pipe, round pipe shaft, upper rotating bearing, wind vane indicating screw, adjustable balance hammer, butterfly type wind vane rudder, fixed wind vane screw, lower fixed bearing, upper and lower connection tower buckle, can take the weighing bottle, the sand dust collection cup is placed on high-precision weighing sensor in the protection weighing bottle cylinder, real-time weighing through the weighing transmitter, data transmission to remote display screen for storage, through data remote antenna, send to laboratory terminal real-time observation sand dust concentration change, thereby realize long-term fixed point in unattended or sandstorm specific environment obtains the collection of dust particle concentration in different height different direction unit time unit area.

The utility model discloses a lodging type weather easy-to-break and fragile wind indicator rod, which relates to the technical field of airport navigation and comprises a fragile rod, the lower end of the fragile rod is arranged on a base in a turnover manner, the fragile rod is provided with a plurality of sections, and the diameters of the fragile rod are sequentially reduced from bottom to top. Wherein a box body is fixed to the outer side face of the fragile rod at the lowermost end, a spotlight and an aviation obstruction beacon are fixedly connected to the upper end of the fragile rod, a wind indicator is rotationally connected to the outer side of the fragile rod at the uppermost end, and the base is fixed to the ground. According to the utility model, through the arrangement of the plurality of sections of fragile rods, the fragile rods can be more easily broken at the joints when being subjected to extreme weather or being impacted by an airplane, so that the airplane is prevented from being damaged.

This utility model relates to the field of sensor detection technology, specifically a simulation test device for an angle-of-attack sensor. The device includes: a control panel that sends control signals to a motor based on the position of a self-test knob; an angle-of-attack sensor comprising a weather vane, a central gear, and a housing assembly, the central gear of which is connected to an angle-of-attack setting knob via a first gear assembly; a transmission mechanism comprising a clutch unit and a motor, the motor being connected to the first gear via the clutch unit to provide power to the central gear; a housing heating device for heating the housing of the angle-of-attack sensor; a thermocouple that transmits a third electrical signal to a logic judgment circuit; and a logic judgment circuit that calculates the temperature value based on the first electrical signal, the self-test angle based on the second electrical signal, and the third electrical signal. This utility model determines whether the angle-of-attack sensor is faulty in a laboratory environment based on the difference between the collected data and the actual value.

The invention discloses an anti-freezing modularized wind measurement sensor, which comprises a base, and is characterized in that the base is provided with a wind speed sensor and a wind direction sensor; the wind speed sensor comprises a shell and a wind cup rotating disc, a wind cup rotating disc rotating shaft is rotationally arranged in the shell, the wind cup rotating disc is formed by splicing an upper layer and a lower layer, a rotating disc heating film is clamped between the upper layer and the lower layer, an arc-shaped arm is connected to the wind cup rotating disc, a wind cup heating piece is embedded in the arc-shaped arm, and wind cups are connected with the arc-shaped arm. The wind direction sensor comprises a first shell and a wind indicator rotating disc, a wind indicator rotating disc rotating shaft is arranged in the first shell, the wind indicator rotating disc is connected with the wind indicator rotating disc rotating shaft, a wind indicator and a wind indicator pointer are connected to the wind indicator rotating disc, and heating films are clamped between the upper layer and the lower layer of the wind indicator rotating disc and the upper layer and the lower layer of the wind indicator pointer. According to the device, the rotating mechanical part can be heated, and wind speed and wind direction measurement errors or measurement failure caused by freezing of the mechanical part are avoided.

The application discloses a wind power energy storage optimization scheduling method and system, which comprises the following steps: collecting wind direction data of natural wind based on a wind vane; if a wind turbine is not in a directly facing position of the wind direction, adjusting the wind turbine according to the wind direction data; if the wind turbine is in the directly facing position of the wind direction, counting the rotating speed of the wind turbine, determining the rotating speed change rate, and if the rotating speed change rate of the wind turbine reaches a built-in early warning value, counting the rotating speed of the blade in the deflection process according to a built-in deflection interval to obtain a first rotating speed change value; determining the real wind direction of the natural wind based on the first rotating speed change value, and determining the best adjustment data of the blade and the deflection angle of a yaw motor in the wind turbine according to the real wind direction of the natural wind; and adjusting the blade and the yaw motor based on the best adjustment data of the blade and the deflection angle of the yaw motor. The application has the effect of improving the energy storage efficiency of the wind turbine.

The present invention relates to an apparatus for testing a single weather vane type angle of attack sensor, the apparatus comprising: a test module operably coupled with the angle of attack sensor and configured to be able to test various functions of the angle of attack sensor; the data acquisition module comprises a communication unit capable of communicating with the attack angle sensor; the central control module is connected with the test module and the communication unit and is constructed to control the work of the test module and the attack angle sensor, and a resolving and analyzing unit is integrated in the attack angle sensor and is constructed to be capable of resolving and analyzing data from the attack angle sensor and the central control module. According to the invention, comprehensive component-level manual / automatic test can be carried out on the single weather vane type attack angle sensor, functional test and fault location can be efficiently and accurately carried out on the single weather vane type attack angle sensor, the test troubleshooting cost of a corresponding cross-linking system is reduced, and the multi-scene test application requirements of aircraft ground final assembly, test flight and the like are met.

The invention discloses a wind power energy storage optimization scheduling method and system, and the method comprises the steps: collecting natural wind based on a wind indicator to obtain wind direction data, and adjusting a wind motor according to the wind direction data if the wind motor is not located at a position right opposite to the wind direction; if the wind turbine is located at the position right opposite to the wind direction, the rotating speed of the wind turbine is counted, the rotating speed change rate is determined, and if the rotating speed change rate of the wind turbine reaches a built-in early warning value, the rotating speed of the blade in the deflection process is counted according to a built-in deflection interval, and a first rotating speed change value is obtained; determining the real wind direction of the natural wind based on the first rotating speed change value, and determining the optimal adjustment data of the blades and the deflection angle of a yaw motor in the wind turbine according to the real wind direction of the natural wind; and adjusting the blades and the yaw motor based on the optimal adjustment data of the blades and the deflection angle of the yaw motor. The effect of improving the energy storage efficiency of the wind driven generator is achieved.

A wind indicator comprises a wind vane body, the wind vane body is detachably and fixedly connected with one end of a rotating shaft, the other end of the rotating shaft is rotationally connected with a protective sleeve, the wind vane body can drive the rotating shaft to rotate synchronously, a magnet is arranged at the bottom of the rotating shaft, a detection device is arranged in the protective sleeve and located below the magnet, and the detection device induces the magnet to obtain direction information. The protective sleeve is fixedly installed on the connecting shell, the lower end of the connecting shell is fixedly connected with a fixing base, and the fixing base is used for installing the anemoscope at the needed position. The weather vane body comprises a marker post, one side of the marker post is a head, the other side of the marker post is provided with a tail wing, a balance weight cover is arranged in the middle of the marker post, and an annular stop plate is arranged in the balance weight cover. Threaded holes are symmetrically formed in the connecting shell and correspond to the stopping plate, and ejection bolts are connected to the threaded holes in a threaded mode. According to the invention, the efficiency of maintaining and replacing parts is greatly improved, the labor intensity is reduced, and meanwhile, the damage to the parts in the disassembly and maintenance process can be reduced.

The invention discloses an island distribution network automatic first-aid repair device, and relates to the technical field of distribution network automatic first-aid repair devices.The island distribution network automatic first-aid repair device comprises a control box body and a wind indicator protection assembly, a rotating shaft is arranged at the top of the control box body, the wind indicator protection assembly is connected to the top of the rotating shaft, and arc-shaped sliding grooves are formed in the two sides of the surface of a protection panel; an expansion plate is fixed to one end of the spring, and wind receiving pieces are distributed on the surface of the expansion plate. According to the automatic emergency maintenance device for the island distribution network, the wind direction empennage deflects along with the wind direction by utilizing wind generated in the natural environment, so that the protection panel always faces the wind, and birds can be repelled and prevented from building a nest in daily weather; and in strong wind weather, high-speed airflow containing impurities can be prevented from impacting the surface of the control box body, and along with the increase of the wind speed, the expansion plates extend out of the two sides of the protection panel, so that the protection area of the protection panel is increased, and the protection effect on the control box body is improved in severe strong wind weather.

A downwind controller is composed of a wind indicator, a potentiometer, a controller and a support. The wind indicator is hung on a potentiometer rotating shaft; a potentiometer seat is arranged in a pin control of the rectangular frame through the rotating shaft; the wind direction controller is installed at the top of the front end of the airship, the wind indicator rotates along with wind and can drive the potentiometer to rotate synchronously, the potentiometer is an adjusting end of the controller, the controller can output forward and reverse rotation control signals by rotating the potentiometer, and the forward and reverse rotation control signals can control airship direction wings to rotate synchronously along with the wind direction so as to achieve downwind control of the airship. The controller not only can be used for controlling a power airship, but also can be used for a tethered boat, can control the airship to hover in the downwind direction through flight control, and can also greatly improve the downwind performance of the tethered boat when being used for controlling the tethered boat.

The utility model discloses a kind of offshore crane safety early warning devices, comprising: construction operation platform, control room is fixedly arranged on construction operation platform upper end, crane main body is fixedly arranged on construction operation platform upper other end, detection main rod is fixedly arranged in construction operation platform upper middle position, fixed clamping ring is fixedly clamped on the surface of detection main rod, first side support rod is fixedly arranged on the side of fixed clamping ring, annular frame is fixedly arranged on the upper side of first side support rod;Real-time monitoring function of wind vane and anemograph provides key wind data for operator, when wind force condition exceeds safe range, the data transmission device built in these equipment can rapidly transmit signal to control room, so that operator can immediately take countermeasures, avoid potential safety risk, LED direction indicating board is automatically bright in insufficient light environment, provide clear direction indication for operator, ensure the operation safety under night or bad weather.

The utility model belongs to the technical field of tower crane electric weather vane automatic releasing devices, and particularly relates to a tower crane electric weather vane automatic releasing device which comprises an electric weather vane and an anemograph, a cover plate is detachably connected to the outer wall of the electric weather vane, an installation assembly is arranged at the end, away from the electric weather vane, of the cover plate, and the electric weather vane comprises a handle. The handle penetrates through the electric weather vane, and the outer wall of the handle is sleeved with a dust cover. The automatic release device for the tower crane electric weather vane can monitor the wind speed in real time by using the anemograph, and can automatically trigger a release mechanism without manual intervention when the wind speed exceeds a preset safety threshold value, so that omission or wrong operation possibly occurring when a project is busy or works at night is avoided, and the automatic release device can effectively release the tower crane electric weather vane especially under severe weather conditions. The device can respond quickly, ensures timely release of the electric wind vane, effectively prevents delay caused by human factors, guarantees continuous operation of a construction site, and remarkably improves the project progress and economic benefits.

The application provides a wind direction indicator alignment device for a wind power generator, which comprises a base, a wind direction indicator, a support, a support plate and an alignment assembly. The wind direction indicator is rotatably installed on the base. The base is hingedly connected with supports at both ends. The supports are hingedly connected with the support plates. The bottom of the support plate is provided with an electromagnet I. The alignment assembly comprises winding wheels, ropes, an electromagnet II and a motor. The two winding wheels are rotatably installed on the base through rotating shafts. The rotating shafts are driven by the motor. The winding wheels are wound with the ropes. The other ends of the ropes are connected with the electromagnet II. The winding directions of the two ropes are opposite. When the rotating shafts rotate, the two winding wheels simultaneously unwind or wind. The two winding wheels are driven to rotate by the motor. The two ropes are wound. The electromagnet II is attracted to the wind power generator shell. The synchronously wound ropes displace the whole alignment device, so that the alignment device is in the center of the wind power generator shell, thereby realizing center alignment.

A slewing system (1) for controlling a slewing of a rotating part (9) of a crane, said slewing system (1) comprising at least: - a slewing geared motor (13) comprising a slewing motor (14) having a motor shaft, and a slewing reducer (16) coupled to the motor shaft (15), the motor shaft (15) being rotatable in two rotation directions which are a clockwise direction and a counterclockwise direction; - a main slewing brake (18) capable of being deactivated for a weather vane setting of the rotating part (9); and - an additional braking device (2) capable of being activated when the rotating part is weather vane setting to exert on the motor shaft a braking torque opposite to a slewing torque exerted by the rotating part (9) on the motor shaft (15), wherein the additional braking device is a hydraulic device. Abstract figure: Figure 1