1065results about "Wind motors" patented technology

The invention relates to the technical field of wind driven generator control, in particular to a thermal management system and method for a wind driven generator, and the system comprises a data collection layer, a prediction module, a digital twin model, an intelligent control and diagnosis engine, and a heat dissipation execution mechanism. In the prior art, an open-loop or simple feedback control scheme based on a real-time temperature threshold value is mainly adopted, the problem of response lag exists, and all heat dissipation parts always work independently and lack cooperation, so that the energy efficiency is low; according to the invention, a closed-loop intelligent thermal management scheme based on a digital twin model is adopted, and real-time simulation and future state prediction are carried out by constructing virtual mapping of a generator thermal system, so that a control system can actively and cooperatively manage all heat dissipation resources according to a simulation result; the method has the core advantage of converting passive into active, and can intervene in advance before excessive accumulation of heat, so that collaborative optimal control of all parts of the system is realized, and the accuracy, timeliness and overall energy efficiency of heat management are remarkably improved.

A double-liquid vibration-damping liquid-shaking tank for a wind turbine tower drum oriented to source network load storage coordination belongs to the technical field of wind turbine vibration-damping equipment, is a liquid-shaking damping structure externally arranged on a wind turbine main body, and comprises a wind direction plate and a liquid-shaking tank structure consisting of an annular liquid-shaking tank, a liquid partition plate, upper-layer liquid and lower-layer liquid, and the turntable fixing structure consists of a rotor and a rotor flange plate. The annular liquid shaking cabin is provided with a central through hole, is sleeved on the tower drum, is internally provided with a liquid partition plate, and is filled with two-phase liquid which has density difference and is immiscible with each other; the wind direction plate is arranged on the outer side of the annular liquid shaking cabin; the liquid shaking damping structure is fixed to the wind turbine tower fixing section through the rotor flange plate. Single shaking liquid is replaced by stably layered immiscible double liquid, the vibration reduction effect of the shaking liquid damping structure is improved, and the shaking liquid damping structure is accurately adaptive to all working conditions; and through linkage of the wind direction plate and the liquid partition plate, the vibration reduction effect of the shaking liquid damping structure is improved, the resonance effect is restrained, and the stability of the vibration reduction effect of the shaking liquid damping structure is enhanced.

The invention relates to the technical field of wind turbine generator maintenance, and discloses a wind turbine generator blade unmanned aerial vehicle deicing assembly and method.The wind turbine generator blade unmanned aerial vehicle deicing assembly comprises an unmanned aerial vehicle, and a laser radar and an installation shell integrating an ultrasonic transducer, a pulse nozzle and a hydraulic pump are installed at the bottom of the unmanned aerial vehicle. The deicing control system obtains focus space coordinates and interface resonance frequency of the blade surface by using a space state sensing module; the stress field focusing module calculates the phase delay amount of the ultrasonic transducer, compensates the pose deviation of the unmanned aerial vehicle by adjusting the emission time sequence, and drives the ultrasonic transducer to generate resonance stress on an ice layer-skin interface; and the sound stream synchronous control module determines a jet flow triggering moment according to synchronous phase locking solution, drives a pulse nozzle at an instantaneous negative pressure phase point of a sound wave period to inject a small amount of deicing fluid into an interface crack, and generates shear stress to induce the interface crack to expand and peel off an ice layer. Accurate throwing of deicing energy is achieved, and the icebreaking efficiency is improved on the premise that the safety of the blade structure is guaranteed.

Disclosed is a spherical roller bearing comprising: at least an outer ring and an inner ring; two groups of spherical rollers; and at least one cage configured to retain the spherical rollers, the cage comprising at least one axially inner cage ring, a first axially outer cage ring and a second axially outer cage ring extending in a circumferential direction of the spherical roller bearing, the first axial outer retainer ring and the second axial outer retainer ring are respectively separated from the axial inner retainer ring and are connected to the axial inner retainer ring through a plurality of retainer rods to form a closed cavity; each pocket is configured to receive one spherical roller and has an axially inner pocket side face and an axially outer pocket side face configured to restrain the spherical roller in the axial direction, each cage bar has a curved portion extending in the axial direction in the circumferential direction, the curved portion is at least partially concave, and in the axial direction, the curved portion is at least partially concave. The distance between the vertex of the bending part and the side face of the axial inner cavity lattice is different from the distance between the vertex of the bending part and the side face of the axial outer cavity lattice.

The utility model belongs to the technical field of wind power generation equipment, and relates to a main shaft device of a wind generating set, which comprises a front main shaft body, a middle main shaft body, a rear main shaft body, a front bearing outer ring, a rear bearing outer ring, a bearing seat, a front roller and a rear roller, the rear bearing outer ring is mounted at the other end of the bearing seat; the front roller is arranged in an annular space formed between the front bearing outer ring and the front main shaft body, and the rear roller is arranged in an annular space formed between the rear bearing outer ring and the rear main shaft body; the two ends of the middle spindle body are connected with the front spindle body and the rear spindle body respectively. The outer surfaces of the front main shaft body and the rear main shaft body are directly used as bearing raceways, and the bearing raceways, the corresponding front bearing outer ring, the corresponding rear bearing outer ring, the corresponding front roller and the corresponding rear roller form an inner-ring-free bearing system, so that the ring running phenomenon is avoided, and the stability of the main shaft in the running process is enhanced; and by splitting the main shaft, the overall size of the main shaft is reduced, and the manufacturing cost is reduced.

The embodiment of the invention provides a fan blade electric heating deicing control method, device and system. The method comprises the steps that when the blade is coated with ice, electric heating films in all heating areas are started for heating, the electric heating films are laid on the surface of the blade and comprise the multiple independent heating areas, and each heating area comprises high-power heating films located on the periphery and a low-power heating film located in the center; the high-power heating film and the low-power heating film of each heating area can be independently controlled; the ice layer falling state of each heating area is judged through monitoring equipment every preset time, at least one piece of monitoring equipment is arranged at the position, close to a blade, of a fan tower barrel, and the monitoring equipment has the laser fog penetrating and lens heating functions and is used for monitoring the blade icing state; and the heating power of the corresponding heating film is adjusted according to the ice layer falling state of each heating area.

The utility model discloses a novel bearing for a fan blade main shaft of a wind power generator, which relates to the technical field of generator bearing equipment, and comprises a bearing seat, a bearing seat base, a bearing cover, a sectional bearing bush, an upper bushing and a lower bushing, the top end of the bearing seat is provided with a circular-truncated-cone-shaped mounting groove, and the bottom end of the bearing cover is a circular-truncated-cone-shaped surface matched with the circular-truncated-cone-shaped mounting groove. A first gap is reserved between the outer wall of the upper bushing and the top wall of the circular-truncated-cone-shaped mounting groove and a first gap is reserved between the outer wall of the lower bushing and the bottom wall of the bearing cover, and a plurality of sectional bearing bushes are movably arranged in the first gaps at equal angles. Compared with the prior art, the service life of the bearing is prolonged, stable and long-acting operation of the wind driven generator is effectively guaranteed, smaller bearing bush segments are adopted, the difficulty in manufacturing, mounting and transporting the bearing bush is reduced, and only a small number of bearing bush segments which break down need to be replaced during maintenance.

The application belongs to the technical field of wind power generation equipment maintenance, and particularly relates to a kind of unmanned aerial vehicle cooperative inspection laser deicing system and method, unmanned aerial vehicle cluster, the unmanned aerial vehicle cluster includes master unmanned aerial vehicle and slave unmanned aerial vehicle, the master unmanned aerial vehicle is equipped with binocular camera for taking pictures and laser radar for ranging, for constructing blade three-dimensional icing map, the slave unmanned aerial vehicle is equipped with pulse laser generator for heating ice layer and thermal infrared camera, the resolution of the thermal infrared camera is 640x512 pixels, and the temperature measurement accuracy is ±0.5 DEG C, and the thermal infrared camera is used for real-time acquisition of blade surface temperature field;The communication delay of the 5GMesh network is less than 100ms, supports dynamic node access and real-time data synchronization;The application is equipped with binocular camera and laser radar, which realizes three-dimensional accurate modeling of the icing area, has small positioning error, improves the detection efficiency compared with manual detection, and avoids the risk of high-altitude operation for workers.

The utility model provides an integrated valve group, a radiator assembly, a lubricating and cooling system and a wind generating set, the integrated valve group is used for the radiator assembly, the radiator assembly further comprises a radiating core body and a bypass channel, the bypass channel is connected with a radiating channel in the radiating core body in parallel, and the integrated valve group is arranged at an inlet of the bypass channel; the integrated valve group comprises a temperature control valve group and a pressure valve group which are integrated into a whole, and an inner cavity of the temperature control valve group is communicated with an inner cavity of the pressure valve group. By integrating the temperature control valve group and the pressure valve group, the integrated valve group can be opened under the condition that at least one of the opening temperature condition of the temperature control valve group and the opening pressure condition of the pressure valve group is met, so that the overall opening condition of a single valve body is widened, the problem of oil trapping of a radiator assembly can be solved, and the damage risk is reduced.

A dual-liquid vibration damping sloshing chamber for wind turbine towers, oriented towards source-grid-load-storage synergy, belongs to the technical field of wind turbine vibration damping equipment. It is a sloshing damping structure externally mounted on the wind turbine body, including a wind vane, a sloshing chamber structure consisting of an annular sloshing chamber, liquid baffles, upper liquid, and lower liquid, and a turntable fixing structure consisting of a rotor and rotor flange. The annular sloshing chamber has a central through hole, is fitted onto the tower, contains liquid baffles, and is filled with two immiscible liquids with different densities. The wind vane is arranged outside the annular sloshing chamber. The sloshing damping structure is fixed to a fixed section of the wind turbine tower via the rotor flange. This invention improves the vibration damping effect of the sloshing damping structure by replacing a single sloshing liquid with a stable, layered, immiscible dual liquid, accurately adapting to all operating conditions. Through the linkage of the wind vane and liquid baffles, the vibration damping efficiency of the sloshing damping structure is improved, the generation of resonance effects is suppressed, and the stability of the vibration damping effect of the sloshing damping structure is enhanced.

The invention discloses an underwater curved surface active self-adaptive adsorption cleaning robot which comprises a rack, a control cabin, a sensor system, an underwater propelling system and four Bernoulli suckers. The Bernoulli sucking disc comprises a connecting shell, a Bernoulli sucking disc surface and a sucking disc power source; the connecting shell is rotatably connected with the rack through the rotating flange bearing and the rotating shaft; a driving push rod is connected between the connecting shell and the rack; the active angle self-adaption of the Bernoulli suction cup is realized through the active push rod; the control cabin completes reconstruction of a working curved surface through the sound wave range finder, the angle of each Bernoulli suction cup needing to rotate is calculated, then the length of each driving push rod is controlled to enable the corresponding Bernoulli suction cup to rotate to the calculated angle, and finally the suction cup power source is controlled to enable the robot to be attached to the working surface. The wall-climbing cleaning device can adapt to most special-shaped curved surfaces, wall-climbing cleaning work can be carried out on the complex and changeable curved surfaces, and no mandatory requirement for surface materials of the adsorption curved surfaces exists.

A kite system includes a kite (14), a pod (25), and a line tree (24), where the kite (14) is bonded to the pod (25) by the line tree (24). The line tree (24) includes branch blocks (27, 28). The branch blocks (27, 28) are connected to the pod (25) by control cables (35, 36). The line tree (24) comprises a first cable segment (48) extending between the branch block (27, 28) and a first attachment point (61) of the kite (14). The line tree (24) includes a second cable segment (49) extending between the branch block (27, 28) and a second attachment point (62) of the kite (14). The lengths of the control cables (35, 36) between the pod (25) and the branch blocks (27, 28) are changed by a control mechanism (39). The length of the first cable segment (48) between the branch blocks (27, 28) and the first attachment point (61) is changed by a trimming mechanism (40). The invention also relates to a method for operating a kite system.

The invention provides a fan blade lightning protection conduction testing method and system based on machine learning, and relates to the technical field of lightning protection conduction testing, and the method comprises the steps: carrying out the current testing of a fan blade lightning protection system through a multi-channel MOS tube control circuit; performing multi-dimensional feature extraction and local feature analysis on the current response data; carrying out feature enhancement and defect identification based on the local feature sequence, and carrying out multistage clustering on an identification result; and performing global health analysis and defect traceability of lightning protection conduction performance on the fan blade lightning protection system according to a defect classification result, generating a defect attribution point location for monitoring, performing feedback optimization on a multi-channel MOS tube control circuit, and constructing a test optimization closed loop. According to the invention, the technical problem that the lightning protection conduction test efficiency is low due to the fact that the static conduction test is difficult to identify early hidden defects in the prior art is solved, the current test is carried out through the multi-channel MOS tube control circuit, and the lightning protection conduction test efficiency is improved.

The invention provides a wind driven generator blade deicing system and a phase change microcapsule coating spraying process, and relates to the technical field of wind power generation equipment protection, the deicing system comprises a heating module, a spiral flow guide rib, a phase change microcapsule coating and a control module; the heating module comprises a heating piece and a fan communicated with the heating piece; the spiral flow guide rib is used for forming a rotational flow air duct, so that hot air formed by heating of the heating module forms rotational flow air flow; the phase change microcapsule coating is at least coated on the wall surface of the inner cavity of the blade; the control module is in communication connection with the heating piece and the draught fan and is configured to adjust the rotating speed of the draught fan and the heating power of the heating piece at least according to the state of the phase change microcapsule coating. The deicing system improves the heat transfer efficiency, enables hot air to effectively cover all areas of the blade, prolongs the residence time of the hot air in the inner cavity of the blade, and improves the hot air utilization rate. And the phase change microcapsule coating and the rotational flow airflow have a synergistic thermal effect, so that the temperature of the wall surface of the blade is effectively, quickly and uniformly increased, and the deicing efficiency is improved.

The invention discloses a planet carrier bearing self-lubricating device and method for a wind power gear box and the wind power gear box, and the planet carrier bearing self-lubricating device comprises a planet carrier which is installed and positioned on a gear box body through a bearing; the oil guide groove structure is arranged on the planet carrier; the oil guide groove structure is configured to respond to rotation of the planet carrier under the working condition that a draught fan idles or rotates at a low rotating speed, and lubricating oil is conveyed to the lubricating position of the bearing from a gearbox oil pool through centrifugal force. The oil guide groove structure is arranged on the planet carrier, lubrication of the planet carrier bearing is decoupled from the working states of a mechanical pump and an electric pump, even if a fan idles, the oil guide groove structure can provide sufficient lubrication for the planet carrier bearing, bearing fretting wear caused by insufficient lubrication when the fan idles is avoided, and the service life of the fan is prolonged. And the failure risk of the wind power gear box is reduced.

The invention discloses a super-amphiphobic anti-icing anti-drag nano coating based on a photo-thermal and phase-change material and preparation and application of the super-amphiphobic anti-icing anti-drag nano coating, and aims to provide the super-amphiphobic anti-icing anti-drag nano coating based on the photo-thermal and phase-change material and a preparation method of the super-amphiphobic anti-icing anti-drag nano coating. The invention further provides the fan blade coated with the super-amphiphobic anti-icing anti-drag nano coating based on the photo-thermal and phase-change materials, the air resistance of the fan blade can be remarkably reduced, the aerodynamic efficiency of the blade is improved, and then the generating capacity is improved. The nano coating is composed of the following components in percentage by mass: 15-25% of phase change microcapsules; 8-12% of a nanoparticle filler; 60 to 75% of fluorine-containing polyurethane resin; and 0.3-0.8% of a dispersant, wherein the sum of the components is 100%. Belongs to the technical field of coatings.

The invention discloses a multi-pendulum-type particle tuned damper and a vibration reduction method thereof. The problems that a traditional tuned mass damper (TMD) is poor in robustness, narrow in vibration reduction frequency band and difficult to adapt to the complex and changeable vibration environment of an offshore wind power tower drum are solved. According to the damper, the supporting plate is hung through the flexible traction component to form a pendulum type tuned mass unit, the N-order inherent frequency of the pendulum type tuned mass unit is tuned to be matched with the N-order inherent frequency of a tower barrel, and efficient resonance energy absorption of main frequency vibration is achieved; meanwhile, the particle filling box is arranged on the supporting plate, the swinging type unit swings to drive particle materials to generate violent relative movement, and broadband vibration energy is widely dissipated through inelastic collision and friction. According to the application, the adaptability, the robustness and the overall vibration reduction efficiency of the damper in a severe marine environment can be remarkably improved.

The present invention relates to the technical field of cooling systems, and provides a semi-open high-power device cooling system and method. The system comprises a semi-open high-power device structure, a semi-open high-power device, inner heat dissipators, inner heat dissipator fans, and a pipeline connection cooling system. According the present invention, the cooling requirements of the semi-open high-power device and a closed environment can be satisfied at the same time, such that the total cost of the cooling system is greatly reduced; according to the present invention, the convective heat transfer of the outer wall of the semi-open high-power device structure can be enhanced by 5-10 kW, thereby significantly reducing self-power-consumption of the cooling system; and according to the present invention, by cancelling a cooling backpack and arranging a plurality of inner heat dissipators below the semi-open high-power device, the pressure of size restriction for a high-power device in a layout of the closed environment is effectively relieved, and localized hot spots of a heat generating element are effectively reduced using double-sided ventilation compared to single-sided ventilation.

The application relates to the technical field of offshore wind turbine operation and maintenance, and discloses a disassembly-free cabin cover type generator replacement hoist and a rooting method thereof, which comprises the following: a plurality of rooting bases, a main frame arranged in a cabin cover, a plurality of rooting lifting lugs on the main frame, and the plurality of rooting bases installed on at least three rooting lifting lugs; a plurality of supporting legs connected with the plurality of rooting bases in one-to-one correspondence, the cabin cover being provided with hoisting holes corresponding to the plurality of rooting lifting lugs and penetrating through upper and lower surfaces, the upper ends of the supporting legs extending to the outside from the hoisting holes and being connected with mounting seats, and the mounting seats being provided with hoists. The supporting legs are arranged in the cabin cover by using the hoisting holes of the cabin cover, the cabin cover does not need to be disassembled, the connecting structure of horizontal waist holes and vertical waist holes is adopted between the supporting legs, the rooting bases and the mounting seats, the horizontal position and the axial rotation angle of the supporting legs can be adjusted during assembly, then the supporting legs are connected and fixed through fastening bolts, the hoist lifting lugs of the main frames of various wind turbines can be adapted, and standardized operation can be realized.

The utility model discloses a tool and yaw brake disc assembly of cleaning yaw brake pad of wind turbine generator, through the lathe tool is put into the basic groove, and the lathe tool part protrudes on the surface of yaw brake disc, when yaw, the yaw brake pad will be pasting the surface of yaw brake disc, above the lathe tool, the cutting edge of lathe tool will cut and remove the enamel hard layer of yaw brake pad surface, realize yaw brake pad cleaning, need not to remove yaw brake. The main technical scheme of the utility model is: a kind of tool of cleaning yaw brake pad of wind turbine generator of Jinfeng, including lathe tool, lathe tool includes first side and second side, the extension amount of lathe tool from first side to second side is greater than the height of basic groove, lathe tool is used to be embedded in basic groove by first side, to make the second side of lathe tool protrude on the surface of yaw brake disc, to clean yaw brake pad with yaw brake pad action and clean yaw brake pad. The utility model is mainly used for cleaning yaw brake pad.

The invention relates to the technical field of wind driven generator control, in particular to a wind driven generator blade electric pulse deicing device thyristor control method, which comprises the following steps of: acquiring multi-dimensional data and fusing the multi-dimensional data into a blade working condition sensing data set to provide a rich and comprehensive information basis; the method comprises the following steps: acquiring blade surface icing thickness distribution data by acquiring a multi-time-sequence data training model and combining calibration data; differentiated division of energy demands is realized by dividing pulse energy demand levels and outputting a distribution matrix; the accuracy of the control parameters is improved by calculating the thyristor conduction angle adjusting quantity and the pulse width modulation parameters; low-temperature compensation correction is performed on the thyristor, so that the reliability of a trigger pulse sequence in a low-temperature environment is ensured; by executing differential electric pulse deicing operation, the deicing efficiency and pertinence are improved; the self-adaptive optimization control of the deicing process is realized by acquiring the deicing completion degree in real time and dynamically updating the regional energy density distribution matrix.

The present application relates to the technical field of wind turbine bearing, in particular to a method and device for adjusting axial force balance of double-row self-aligning roller bearing, the device comprises an axial force applying assembly arranged outside the bearing seat, the axial force applying assembly is composed of a ring-shaped positioning element and a plurality of groups of elastic elements arranged uniformly along the circumference in the cavity of the positioning element, the inner ring of the positioning element extends radially inward and projects to cover the outer ring of the bearing, one end of the elastic element faces the inner part of the cavity, and the other end contacts the outer ring of the bearing through a pressure equalizing ring. The present application generates a reverse additional support force under the action of axial load, actively transfers part of the load from the stressed side bearing row to the non-stressed side, solves the problem that the roller contact stress of the stressed side of the existing double-row self-aligning roller bearing is too high under the single-sided axial load working condition, and early fatigue spalling is easily caused, realizes the balanced distribution of axial force, effectively reduces the peak contact stress, and significantly prolongs the service life of the bearing.

A buoyant offshore renewable energy system mounting platform is provided for use in supporting a renewable energy system in a body of water. The platform comprises a buoyant spar having a top end and a bottom end, the spar arranged to support a renewable energy system thereon; and a plurality of mooring lines arranged to tether the spar to a bed of a body of water such that the buoyant spar is positioned in the body of water at an operating depth. The plurality of mooring lines comprise: one or more first mooring lines affixed to a bottom end of the spar, the bottom end distal to the top end, and arranged to engage the bed of the body of water; and at least three further mooring lines, a first end of each of the further mooring lines being in communication with the spar between the top end and the bottom end thereof, and a second end of each further mooring line being arranged to engage the bed of the body of water such that said further mooring line is oriented diagonally relative to the spar at the operating depth; wherein at the operating depth, the first end of the spar is positioned above a surface of the body of water and the second end is positioned below the surface of the body of water. The described platform aims to provide a simple and stable offshore renewable energy system mounting solution having a simpler manufacture, assembly and deployment procedure along with easier ongoing access for deployment and maintenance vessels to minimise damage during deployment and maintenance.

The utility model relates to a bearing lubricating structure of a wind power gear box. According to the technical scheme, a main shaft is arranged in the gearbox, the right end of the main shaft is fixedly sleeved with one end of a magnetic coupling, the magnetic coupling comprises an inner rotor, the periphery of a box shell outside the inner rotor is movably sleeved with an outer rotor, a rotating shaft is fixedly inserted into the right end of the outer rotor, and the rotating shaft is fixedly arranged on a rack in a sleeving mode through a bearing. The rear end of the infusion pump is fixedly installed on the machine frame, an oil discharge outlet in the upper portion of the right end of the infusion pump is connected with a liquid injection pipe in a sealed mode, the left end of the liquid injection pipe is communicated with a lubricating pipe opening in the gearbox, an oil inlet in the lower portion of the left end of the infusion pump is communicated with an oil storage tank on the lower portion through a pipeline, and the oil storage tank is installed on the machine frame. The shaft seal has the advantages that magnetic transmission is achieved, an external power source is not needed, energy is saved, meanwhile, the problem of leakage of a traditional shaft seal is solved, the rotating speed of the infusion pump is synchronous with the main shaft, and lubricating flow is automatically adjusted along with changes of loads of a gearbox.

The invention provides an ice-thorn-resistant structure, and relates to the technical field of offshore wind power ice-resistant structures, the ice-thorn-resistant structure comprises a pile column mechanism, a cage sleeve mechanism, a driving mechanism and a plurality of ice-thorn mechanisms, the cage sleeve mechanism is slidably connected with the pile column mechanism, and the cage sleeve mechanism is sequentially provided with the plurality of ice-thorn mechanisms in the circumferential direction of the cage sleeve mechanism; the driving mechanism is connected with the pile column mechanism and the cage sleeve mechanism, and the driving mechanism is used for driving the cage sleeve mechanism and the multiple ice thorn mechanisms to move in the extending direction of the pile column mechanism. The technical problems that in the prior art, an existing ice-resistant structure is large in weight, complex to mount and dismount and incapable of adapting to tidal range changes are solved.

A jacket assembly 100 is provided for attachment to a subsea flexible line for facilitating passive control of movement of the flexible line. The jacket assembly comprises a plurality of jackets (FIG

The rust removal and spraying robot comprises a wall climbing robot, a sand blasting and rust removal mechanism and a coating spraying mechanism are mounted at the top of the wall climbing robot, the sand blasting and rust removal mechanism is used for removing rust on the surface of a tower drum of the wind turbine generator, and the coating spraying mechanism is used for spraying the rust-removed position. A negative pressure recovery mechanism is installed at the bottom of the wall-climbing robot and collects pollutants drifting away in the rust removal and spraying process. The sand blasting derusting mechanism comprises a sand tank, and an air compressor, a control valve and a sand nozzle are installed on the sand tank. The device has the advantages of being safe and efficient, and the problems that when rust removal and paint spraying are conducted on a tower drum of an existing wind turbine generator, falling accidents are likely to happen through manual rust removal and spraying, the safety is reduced, a wall-climbing robot needs to be independently provided with a rust removal mechanism and a spraying mechanism, the working efficiency is low, and the maintenance cost is increased are solved.

This invention discloses a multifunctional construction platform for concrete towers of wind turbines, comprising a support beam (3), a platform body (4), fixed connectors (61), vibration damping connectors (62), and vibration dampers (7). The support beam is a grid structure composed of several beams connected together, with several connection ends formed at the edges of the support beam. One end of each fixed connector is connected to a connection end, and one end of each vibration damping connector is connected to a connection end via a vibration damper. Fixed connectors and vibration damping connectors are arranged at both ends of each beam. The other ends of the fixed connectors and the other ends of the vibration damping connectors are installed on the wall of the concrete tower (1). The platform body is installed on the support beam, so that the platform body is horizontally erected inside the concrete tower. This invention can reduce the vibration impact of wind turbine operation on the concrete tower, and also ensures the balance and stability of the construction platform, improving the safety of the concrete tower and the construction platform.

The invention relates to the technical field of crane self-lifting equipment, and discloses a self-lifting hoisting system. The system comprises a steering mechanism, a crane, a guide mechanism and a lifting mechanism. The two opposite sides of the crane are provided with crane guiding pieces respectively. The guide mechanism comprises at least two guide driving structures and a guide rope driven by one guide driving structure; and the guide rope extends towards the cabin, is wound on the steering mechanism and is connected with the other guide driving structure. The lifting mechanism is connected with the crane and used for lifting the crane to the cabin. In the lifting process of the crane, the crane guide piece makes contact with the guide rope and slides along the guide rope so as to guide the lifting path of the crane. According to the invention, the crane guide piece is utilized and is matched with the steering mechanism, the guide driving structure and the guide rope, so that constraint can be formed on two opposite sides of the crane in the lifting process, the wind load disturbance is effectively weakened, the shaking or rotating risk can be greatly reduced, and the lifting stability and the high-altitude operation safety of the crane can be improved.

Disclosed is wind turbine (1) comprising a wind turbine gearbox (15), a generator (17) and / or a converter (18) arranged inside a nacelle (3) of the wind turbine (1). The wind turbine (1) further comprises a liquid cooler (7) arranged to cool a liquid flowing through the wind turbine gearbox (15), the generator (17) and / or the converter (18) by way of air ambient to the nacelle (3). The liquid cooler (7) comprises a first liquid cooler part (8) having a first part cooling capacity and a second liquid cooler part (9) having a second part cooling capacity, wherein the second part cooling capacity is greater than the first part cooling capacity. The liquid cooler (7) also comprises a bypass conduit (10) arranged to guide a liquid from the first liquid cooler part (8) past the second liquid cooler part (9), and valve means (11) arranged to control flow through the bypass conduit (10), wherein the valve means (11) are controlled based on at least one characteristic of the liquid flowing through the liquid cooler (7).