BLADE LIFTER
After the rapid development of the wind energy market in recent years, the wind energy resources in the plain area with good construction conditions have almost been developed. At present, wind turbine heavy haul transport carriers are being transported to the mountainous area and sea with difficult construction conditions. However, the mountain roads are narrow and the turning radius is small.
In order to effectively avoid the collision between the wind blade and the mountain, the wind blade must be transported in an inclined state. Therefore, Rui trailer's blade lifting appears in the market, and will greatly help for a transport company for such area to use.
HOW DOES BLADE LIFTER TRANSPORTWORK
Generally, in order to make the wind blade avoid obstacles more effectively, it is also necessary to make the blade rotate horizontally 360 °, so a slewing bearing is set between the blade lifterand the slewing platform. However, when the blade lifter lifts the blade, the center of gravity of the blade rises upward and moves to one side of the blade lifter. If the blade lifter wind turbineof the distance from the vertical line passing through the center of gravity of the wind blade to a certain point and the weight of the wind blade is the blade gravity distance, the gravity distance of the wind blade relative to the slewing bearing changes during the lifting process of the wind blade.
In other words, the balance condition of the blade lifter is different under the horizontal and lifting state of the wind blade transport. This brings a problem, that is, if it is designed that the upper part above the slewing bearing is balanced when the wind blade is lifted by a certain angle, such as 30 ° (the center of gravity of the upper part is on the axis of the slewing bearing), the blade can rotate 360 ° when the blade is lifted by 30 ° or near, but if the blade is placed horizontally, one side of the blade is too heavy. When 360 ° rotation, the blade lifter can easily turn over to one side of the wind blade. If the upper part is designed to be balanced when the wind blade is placed horizontally, it can rotate 360 ° when the wind blade is placed horizontally. However, if the wind blade is lifted at a certain angle, such as 30 °, one side of the counterweight is too heavy. When turning 360 °, the blade lift is easy to overturn to one side of the counterweight.
However, it is inevitable that the center of gravity will rise when lifting the wind blade. Therefore, how to make the center of gravity of the upper part only rise while the gravity distance relative to the slewing bearing remains basically unchanged or changes as little as possible is the problem that the blade lifter needs to solve.
The simplest blade lifter is to hinge a swing frame on the rotary platform, set a pitch slewing bearing between the swing frame and the transition plate, fix the wind blade on the transition plate, and push the swing frame to swing around the hinge fulcrum through the lifting oil cylinder, which can lift the wind blade upward at a certain angle.
At present, blade lifter in this special market mainly adopts three technical ways to solve this problem. First, increase the weight of the whole unit so that the weight of the rotating platform, blade lifter and wind blades, which change the weight of the loaded heavy moment, is relatively small, so that the change of the heavy moment of the whole unit is relatively small during the lifting process; The second method is to set the movable counterweight, that is, set the movable counterweight on the rotary platform, and move the counterweight automatically or manually while lifting the wind blade, so that the center of gravity of the upper part is basically maintained on the axis of the rotary bearing; The third is the method of moving the blade lifter, that is, setting a sliding slider and chute to make the blade lifter slide to one side of the slewing bearing while lifting the wind blade, so as to keep the center of gravity of the upper part basically on the axis of the slewing bearing.
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