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June 24, 2021
When in use, the wind turbine blades can be fixed to the rotating platform, and the rotating platform itself can rotate 360 degrees, and the fixing device itself can also rotate. When encountering complex road conditions that are difficult to pass directly, the blades can be rotated to any one The angle suitable for passing greatly increases the passing performance of the vehicle and makes the wind power transportation safer and more convenient.
In order to solve the instability of the vehicle's center of gravity caused by the longer blades during rotation, a counterweight box is designed in the opposite direction of the blade installation position. Ballast can be added as needed, and the distance between the counterweight box and the slewing platform can also be hydraulically used as needed. The cylinder is adjusted to avoid the risk of overturning due to the unbalance of the center of gravity of the whole wind blade adaptor caused by the transportation of long blades.
The length of the wind blade is at least 30 meters, so the above-mentioned transportation method cannot be used in mountainous areas. What should I do? Recently, we saw a semi-trailer specially designed to transport wind blades, which solves the problem of transportation in the mountainous area of wind blades. It is different from the transportation on the car, which is similar to holding a big sword in hand. , The wind blade can be moved up and down, left and right in different directions, so as to avoid various obstacles on the mountain road to meet the needs of wind blade transportation.
On the fixed base of the blades, the low center of gravity ensures safety
Today, the wind blade adaptor we are going to tell you is different from the picture above. The rearward setting makes the length of this wind blade semi-trailer shorter, which is conducive to driving in mountainous areas; the operation by dedicated personnel is helpful to improve safety.
Unlike conventional vane transport vehicles, the length of this wind blade trailer is very short, which is also to satisfy that the vehicle can run normally on mountain roads. You can think of it as a crane, with its walking part on the bottom and a turret on the top. The wind blades are like the boom of this crane.
The wind blades to be transported are fixed on the vehicle by bolts, and the wind blades and the base are firmly integrated. During the transportation process, the wind blades can move up and down, left and right, without danger. The up and down displacement of the base is realized by the oil cylinders arranged on both sides, which can achieve a 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 back of the base can prevent the counterweight to achieve For the balance of the entire vehicle, the counterweight can be flexibly added according to the weight of the wind blade. The wind blade trailer is equipped with 275/70R22.5 size tires, the purpose is to reduce the height of the entire vehicle, not only more convenient when loading and unloading, the lower height also ensures the stability of the vehicle during operation.
Inspired by cranes, air conditioning improves comfort
The turret is fixed on the trailer, and the hydraulic motor drives the gear fixed under the turret to realize the rotation of the entire base. The turret can theoretically realize a 360-degree rotation.
If the wind blade is so long, the force generated by the frontal wind is very terrifying, and if it is held high, it is very likely to overturn the wind blade adaptor. To solve this problem, the base can rotate along the axis of the blade under the premise of satisfying the lifting requirement, so that the windward side of the blade is always on the side with the smallest area.
A diesel engine is mounted on the trailer, and the hydraulic pump directly connected with the rotating shaft provides the power source for the upper part.
The square welded oil tank is used to store hydraulic oil and can provide all heat dissipation capabilities, so there is no radiator installed. The upper part comes with a battery and a fuel tank, and the arrangement of the pipeline is dazzling. It would be better if it can be straightened out. The hydraulic motor that realizes the rotation of the turret and the fuel tank that provides grain for the diesel engine. The entire upper part is operated by a dedicated person, and the operating principle is basically similar to that of a crane. In order to improve the comfort of the operator, an air conditioner is installed in the operating room.
Wind Blade Adaptor & Drawing
Mountain wind farm roads can be divided into entry roads and on-site roads according to regional location. The entry roads are generally external roads, and the on-site roads mainly connect the units and wind turbines in the site. The main purpose of building roads for wind farms:
First, to connect the units in the wind farm and connect with the road outside the factory area for material transportation during the construction period. The wind turbine tower, blades, nacelle and other ultra-long and heavy equipment enter the site and Hoisting and operation provide basic guarantee; second, after the wind farm is put into operation, it is convenient for the normal overhaul and operation and maintenance of the wind farm and units. The purpose of external roads is to connect external roads and internal roads. The internal roads are internal roads, which are generally divided into main roads and branch roads.
Among them, the main road connects each unit in the plant, and the branch road extends to connect each fan. Under the common connection of main roads and branch roads, the entire mountain wind farm can achieve smooth traffic and reasonable and orderly operation. Compared with other roads, mountain wind farm roads are of lower grade, and generally have the characteristics of mountain roads and wind farm roads. The road design of mountain wind farms is unique, which is quite different from the general road design of field areas. Since there are no specific guidelines at present, most engineers generally design with reference to low-grade highway design standards, combined with their own years of engineering practice. The route layout of mountain wind farms will be affected by many factors.
They are all permanent roads, and the traffic volume will be relatively large during the construction period, but after the operation of the wind farm, only the operation and maintenance vehicles will pass. Therefore, road design considerations must be made on the premise of high cost performance and rapid construction. At the same time, it is necessary to comprehensively consider factors such as fan location, line layout, project cost, etc., and based on technical indicators, engineering quantities, etc., to rationally transform mountain roads, and optimize route selection design, so as to explore more scientific, reasonable and economical road design scheme.
Wind farm road transportation industry background
After years of development, the large-scale transportation and logistics of the foreign wind power industry has become very mature. Developed countries have good road conditions, high-horsepower semi-trailer tractors with superior performance, and a wide variety of models used in the transportation of large-scale roads, which can meet the needs of various types of large-scale transportation. At the same time, the management of heavy-duty transportation vehicles in the United States, Europe and other countries is not as strict as that in China.
With a complete set of advanced logistics management systems, the transportation benefits of large-scale highways for foreign wind power equipment are very high. Domestic wind power started late compared to foreign countries, but with the rapid development of the wind power industry, foreign advanced wind turbine transportation models have gradually been used for reference by the domestic logistics industry. The mountain wind farm road is to connect the booster station and the outside road of the wind turbine station to meet the needs of equipment transportation and hoisting during the construction of the mountain wind farm and maintenance during the operation. The design and construction of mountain wind farm roads should consider the permanent and temporary combination, and meet the transportation requirements while reducing the project investment. The three factors of wind turbine equipment, large-scale transportation vehicles and road survey and design should be considered comprehensively, in order to achieve safety, application, and design. Economical and convenient.
1. After researching and analyzing the data of commonly used domestic and imported wind turbine models in mountain wind farms, it can be concluded that the heaviest part of wind turbine equipment is the nacelle, the widest part is the first section of the tower, and the longest part is the blade. For traditional ordinary road transportation, the above-mentioned wind turbine components are all out-of-limit objects and must be transported by corresponding professional vehicles.
2. The commonly used models of domestic mountain wind farms have been developed from the 750kW class to the 2500kW class in the past. Large-impeller, large-capacity, low-speed wind turbines have become more technologically mature, especially the 2000kW model has become the mainstream wind turbine model used in mountain wind farms on the market today. In this chapter, the representative model of 2500kW Xiangdian XE105-2000 is selected as the research object of wind turbine equipment transportation in mountain wind farms.
3. Nowadays, the common transportation methods of wind turbine equipment in mountainous wind farms in China are divided into ordinary flat vehicle transportation and special vehicle transportation. The two transportation methods have their own advantages and disadvantages. However, compared with the special terrain and landform restrictions of mountain wind farms, the author recommends that mountain wind farms should be transported by special vehicles.