Windmill Blade Adapter | Luyi Vehicle

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Different transportation methods of wind turbine blade

● Ordinary flatbed truck transportation

This mode of transportation generally uses ordinary extendable trailers to transport fan blades. The characteristic of this vehicle is that it can be extended longitudinally to accommodate the transportation of blades of different lengths. It can be transported directly from the manufacturer to the fan station, but the vehicle has a long turning distance and is difficult to turn.

Ordinary 4 Axle Extendable Trailer for Wind Turbine Blades Transportation

Ordinary 6 Axle Extendable Trailer for Wind Turbine Blades Transportation

Windmill Blade Adapter

● Special vehicle transportation

This mode of transportation generally adopts blade lift - rotation - hydraulic rear wheel steering of the special blade transporter (windmill blade adapter), the special vehicle in the driving process through the hydraulic control of the blade lift and rotate 360 degrees on their own, avoiding the transport process of various restrictive obstacles (hillsides, trees, houses, bridges, tunnels, etc.), thus greatly reducing the overall length of the blade transport vehicle body, improve turning performance. The blade transportation vehicle can be used to transport the blades in the transportation process.

● Analysis And Comparison Of Special Vehicle (Wind Blade Adapter) Transportation And Ordinary Flat Vehicle Transportation

The advantages of special vehicle (rotor blade adapter) transportation compared with ordinary flatbed vehicle transportation. When the length of the blade is 51m and the height is 35°, the non-interference height is 32.28m and the area is 641m2; while the horizontal transportation non-interference height is only 2m and the area is 62.6m³; the area involved in the curve transformation project is reduced by 10 times. Adopting lifting method to transport blades can better avoid high mountain cliffs and house buildings, and realize rapid transportation of blades. At the same time, this method can also reduce the cost of road reconstruction, house demolition and relocation, etc., which is conducive to improving the blade transportation efficiency and engineering benefits.The disadvantages of special vehicle (windmill blade transport adaptor) transport compared to ordinary flatbed transport. Due to the limitations of highways and most grades of roads, wind turbine equipment can only be transported by ordinary flatbed trucks on the national public transportation network.

Therefore, when mountain wind farms are transported by dedicated vehicles, it is necessary to select suitable locations near the wind farm area to set up midway transfer stations. Referring to previous mountain wind power projects, the transportation cost of a wind farm with an installed capacity of 50MW will increase by about 3.5 million RMB if dedicated transportation is used. The height of the blades will increase to more than 30m after lifting, which will increase the net height requirement along the route, and compared with ordinary flatbed truck transportation, it will increase the removal of objects with height restrictions (such as cables across the highway, pipelines, tree branches, etc.). Secondly, because the center of gravity of the vehicle rises after the blade is lifted, which is not conducive to the stability of transportation, it is necessary to place counterweights in the front of the vehicle, and at the same time, avoid transportation in strong windy weather.

Wind Blade Adapter/Wind Blade Lifter Adaptor

Two Types Of Wind Blade Trailer(Windmill Blade Transport Adaptor)

This method of transportation typically uses a common extendable flatbed trailer to transport the wind blades. These extendable flatbed trailer are characterized by the fact that they can be retracted to accommodate blades of different lengths.They can be used to transport wind blades and towers. If you want to handle different types of loads in your operation, this is the wind turbine transportation vehicle you need. Extendable flatbed trailer are designed and constructed to meet these needs.The tail platform forms the rear of the retractable trailer. Large wind turbine transportation vehicles can be either folding or pull-down platform configurations. Therefore, the user can choose a retractable trailer based on these tail platform configurations.

Two parts of the wind blade trailer

On the fixed base of the blades, the low center of gravity ensures safety

Wind blade adapter, rear setting makes this wind blade lifter adapter shorter, which is good for driving in mountainous areas; operated by special person, which is good for improving safety.

The wind blade to be transported is fixed on the vehicle by bolts, the wind blade is firmly combined with the base, and the wind blade can be moved up and down, left and right without danger during transportation. The up and down displacement of the base is realized by the cylinders arranged on both sides, which can realize the lifting range of 0-60 degrees. In order to ensure that the center of gravity of the wind blade is unstable when it is displaced, the rear of the base can be prevented from counterweights, so as to achieve the balance of the whole vehicle, and the counterweights can be added flexibly according to the weight of the wind blade. The trailer is equipped with 275/70R22.5 size tires in order to reduce the height of the whole vehicle, not only is it more convenient when loading and unloading, but the lower height also ensures the stability of the vehicle during operation.

The turret is fixed on the trailer, and the hydraulic motor drives the gear fixed under the turret to realize the rotation of the whole base. The turret can theoretically rotate 360 degrees.

If the wind blade is so long, the force generated by the head wind is very terrible, and if it is lifted high, it is likely to overturn the wind blade adapter transporter. In order to solve this problem, the base can be rotated along the blade axis under the premise of meeting the lifting requirements, so that the windward side of the blade is always on the side with the smallest area.

A diesel engine is installed on the wind blade lifting and transferring trailer, and a hydraulic pump directly connected to the rotating shaft provides the power source for the upper part.

A square welded tank for storing hydraulic oil provides all the cooling capacity, so no radiator is fitted. The upper section comes with its own battery and fuel tanks, and the arrangement of the lines is so dizzying that it would be nice to have them straightened out. The hydraulic motor that enables the turret to rotate and the fuel tank that provides the food source for the diesel engine. The whole upper part is operated by a person, and the operation principle is basically similar to that of a crane.

Windmill Blade Adapter Trailer Drawing

4 Line 8 Axle Windmill Blade Transport Adaptor

Wind Blade Lifter Adaptor

Features And Design StandardsOf Road Engineering For Mountain Wind Ams

The Cost Is High And The Project Quantity Estimation Is Difficult

● Take the 25 common mountain wind farms with a total capacity of 50MW in China as an example. The road in the field is about 30 kilometers long, and the cost per kilometer is about 1 million yuan, and the cost is about 30 million yuan, accounting for more than 20% of the total cost of wind power civil engineering.

● The terrain and landforms of mountain wind farms are complex, resulting in a large difference in the engineering volume of different projects; and due to the requirements of project investment progress, detailed geological surveys are often not carried out during bidding and construction, the geological conditions are uncertain, and the engineering volume is difficult to estimate.

Construction

During construction: Heavy vehicles crushed frequently. From the concrete truck, one of the trucks weighs 17 tons and carries 16 tons, with a total weight of 33 tons. The amount of concrete for each machine base of the mountain wind farm can reach 300m³-400m³. When pouring the foundation of the wind turbine, the branch road will be repeatedly crushed by the concrete mixer truck 30-40 times, while the main road may be crushed 90-120 times, which will cause the road surface to be crushed if the quality of the road surface is not up to standard.

Transportation

During equipment transportation: the equipment transportation vehicles mainly have the characteristics of over-length, over-width, over-weight, etc. For example, when transporting the blades of 2MW units, the distance from the head to the tip of the blades is more than 50m, and the width of the trailer plate is 3m; when transporting the engine room, the total weight of the vehicle is about 100t. These characteristics are different from those of the ordinary roads.

Follow-up

Road Design Standards For Mountain Wind Farms

Generally speaking, the requirements for roads in mountainous wind farms are not high. The roads in mountainous wind farms in China are generally designed as Class IV or Class IV factory and mine roads. However, in actual work, due to the lack of national unified standards, the technical indicators of some mountainous wind farm roads are higher than the Class IV highway standards, while others are lower than Class IV highways. Based on the research of various data, this paper believes that the standards of "Class IV off-site roads" or "secondary roads within the field" in the "Design Specifications for Factory and Mine Roads" should be followed. The design speed of mountainous wind farm roads is between 15 km and 20 km. If heavy, large and special equipment is to be transported, the design speed can be controlled at 5-10 km/h for safety reasons.

The various technical indicators of wind farm road design can only be determined with reference to the design standard of class IV highway and combined with the actual transportation situation. The width of roadbed surface is mainly controlled by heavy and large transportation vehicles and lifting machinery, and the width is generally more than 3-4m, therefore, taking into account the mountainous terrain and the reliability of the roadbed, as well as the need for a small number of small vehicles to stagger, the minimum width of the travel lane can be taken as 4.5m, and the corresponding width of the roadbed is 5.5m, 6.0m. In the particularly difficult locations, the straight section can also be 4.5m roadbed width, but should be set up with staggered lanes and warning signs.

Straight sections can also be used 4.5m width of the roadbed, but should be set up wrong lane and warning signs. The radius of flat curve is mainly controlled by the transportation of blades and towers, and the minimum radius is related to the width of the road surface and the widening value, and the theoretical limit can be about 20m. In practice, ordinary flatbed truck transportation considerations are generally not less than 35m, special vehicle transportation considerations are less than 20m. According to the “Highway Route Design Specification”, the maximum longitudinal slope of the road should be controlled within 9%; but according to the specific conditions of the mountainous wind farms should be an appropriate increase in the longitudinal slope value of the general trunk road should not exceed 14%, in the branch road or local terrain of special road restrictions can be appropriately relaxed to 16% or even 18%. 16% or even 18%. At this time, cement concrete pavement should be used to increase road friction or transport vehicles to take auxiliary traction measures to ensure the safety of equipment transportation.

Bridge and culvert reinforcement is a common problem for access roads to mountainous wind farms. Due to the special geographical location of mountainous wind farm roads, complex and diverse terrain, the original road grade and road conditions are relatively low, and various bridge and culvert facilities are not only simple, but also have the problem of disrepair. They must be reinforced to play their role. Meet the transportation load requirements of wind farms for heavy parts. When reinforcing the bridges and culverts on mountainous wind farm roads, the main parts should be considered comprehensively. According to the transportation requirements, scientific design should be carried out according to the structural characteristics, bearing capacity and disease conditions of the existing bridges and culverts, and the most feasible reinforcement principles and reinforcement plans should be selected. Mountainous wind farm roads can be divided into temporary roads and permanent roads. For bridges and culverts on permanent roads, the focus should be on improving the bearing capacity of their structures; for temporary roads, temporary measures can be taken to disperse the load on the road, or temporary passages and bridges can be built for vehicles to bypass. In the specific implementation process, it should be determined based on technical and economic comparisons.

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