Wind- driven dynamo is bigger and bigger, the industry is faced with more cost to drop the challenge with taller manufacturing efficiency. In the meantime, manufacturer people the cost that facing high quality standard. 1/3 what rotor lamina holds turbine cost normally, have very high labour force content in production process at present. The problem of clearly is: Is production process OK automation?
Answer since is trade, also be a technology go up. Using prefabricated component technology may be the answer. To implement flow automation, blade makes a process should be regarded as to rig a process, and the flow nowadays is regarded as a mould to make a process normally. Through accurate prefabricated component is being assembled with correct quality in proper place, can change rotor lamina make. In the article, rewAir shared the work that does up to now, express to consider to had be notted finish.
Automation and public errand
In a few years of in the past, various act will realize rotor lamina to make automation. The method that uses normally is the automation of whole layer lay up in the mould. Large automation the method that dragon door system is first selection, but should consider investment return rate (when ROI) , in the spare parts amount that produces during blade life, make it is in trade applying hard. Wind energy industry more and more famed with cycle of short sawn timber and small lot. This makes will look from ROI and yielding angle, implement comprehensive automation almost impossibly.
It is OK that compose of prefab concept —— is built by the small-sized unit in booking order to set a pattern —— needs to a simple “ chooses and set ” unit, have the flexibility of a variety of lamina and towed bird design and appearance. To reduce economic cost, all and small-sized prefabricated component can be built by a single central position, create higher investment utilization rate thereby. Because compose builds the supply of prefabricated component,catenary can increase according to need, be clearly to the positive effect of the industry.
RewAir had been offerred for rotor lamina production industry tens of year prefabricated component. Major prefabricated component of production is suture. However, to satisfy the automation demand that the industry increases ceaselessly, this company present target is to realize essence of life to allow prefab. Become a possibility to make be placed correctly of prefabricated component, the precision of prefabricated component and public errand must very tall. Need pays close attention to the jackknife between prefabricated component and the fixed position in the mould particularly. To realize high accuracy, rewAir is studying at present the application of automation cascade laid, the precision that needs in order to ensure and public errand (graph 1) .
Nicety beforehand figuration research
In nicety beforehand in figuration research, studied structure of a kind of will large composite material decomposes the method of lesser unit. This kind of method regards production process as a series of assembly the process, is one shapes not just process. For this, the most crucial part that we took rotor blade namely clapboard.
This kind of structure is in drawing and the mechanical load that reduce load to fall are highest, make by long one-way fiber normally. We know the first to empty shell may not be by beforehand figuration the part that replace. However, restrain a condition to understand better, we chose the component with top demand designedly (worst circumstance) .
Make the two clapboard of half have two main challenges, it is connective intensity above all; Next, want placement fibrous precision or common difference. The public errand of expectation connect has immediate effect to its intensity.
Proper design and project are a foundation, offerred an opportunity to find a solution. Our research makes clear, mix when the project when emulating the one part that makes a process, can design more compact joint. Length of initiative joint design reduced 60% above, maintained the carrying capacity that clapboard place needs at the same time.
This solution is use contact of cone-shaped a flight of stairs through be between two clapboard that assembling (graph 2) makes the interpose that accords with requirement public errand and dimension precision make will come true. Pass numeric computation, choose pair of slope rank to jump joint develop to attack to choose joint as actor.
Numerical value analyses the epoxy resin that as a result lamina of as actual as imitate wind produces a condition to shape beforehand sample undertook comparative. Prefabricated component is made by hand, but auxiliary equipment comes imitate automation process. Every technology measure is controlled with the examination.
Material chooses to reach application
Any change of material have very big effect to the quality of production and material normally. Stem from this reason, we studied the foregone vitreous tissue that there is good record in wind energy industry. Make prefab club all sorts of established techniques see next tables.
Shape beforehand to nicety, 5 kinds of technologies choose main above, choosing use powder to shape beforehand is most those who accord with economic demand, this also has good record in the industry. Use as the powder of adhesive has vitrification transition temperature inside limits of temperature of perfusion process solidify (Tg) , because this won't produce any treatment problems.
Powder brings to bear on with the means of automation by textile manufacturer, go up in order to ensure adhesive distributings equably in fabric, because this accords with top quality requirement. Nicety shapes beforehand accompanying additional cost of material, and the demand to tool and treatment. Accordingly, the proposal undertakes cost effectiveness is analysed, in order to decide in the application in large and complex structure accurate prefabricated component brings the place of the greatest benefit. In other part, continue to use suture prefabricated component (graph 3) is likely more economy. The layer pressing plate of blade planned to urge these alternatives, rewAir supports a client to evaluate optimal choice and final choice.
Check setting and result
Will include 5 not to have contact sample (sample of “ primitive ” ) inside a series of experiments and 5 sample that have double scarf contact undertook comparative. Check the dimension of sample, material and lay up composition are custom-built. Dimension by the biggest change, have representative contact in order to offer, can get used to existing test equipment. Test sample bears remarkable experiment load (> 400 KN) . All sample are in static carry ultimate tensile strength had below the condition (UTS) checks. Use strain gauge and say heavy sensor monitors different parameter. The independent test orgnaization that the test approbates by DNV undertakes, this orgnaization checks a respect to have rich experience in composite material. What the test of sample of “ primitive ” uses at offerring treatment and project hypothesis as a result is fiducial. The test shows consistency is first-rate.
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Origin: Answer lumber industry is encircled