Automotive Black Technology Chapter 751: : Perfection comes from innovation!
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As early as the 1980s, experts in the fire protection field predicted the development direction of elevated fire trucks;
There will always be a platform that can carry various firefighting machinery, and you can switch tools at will like a Swiss army knife.
Human history has never been short of fantasies about future technology, and it must be said that there is no shortage of insightful people in any era.
It is just a long and long road to turn your vision into reality. It’s one thing to come up with a concept, but it’s another thing to implement it into concrete applications.
Li Fanyu would never have imagined that what he is doing now is inadvertently following the flag set by experts in the field decades ago.
After the concept and specific ideas of the universal platform were settled, Li Fanyu asked Liu Qing to lead the team to improve the details.
Xu Fufang’s team has always been focusing on vehicle ECUs. Now they are responsible for the research and development of precision operating systems installed on fire trucks. It can be said that they have the foundation and are familiar with it.
One of the more difficult aspects of this project is that the operating system needs to be combined with a hydraulic press that requires high flow and precision. However, in the previous research and development of the dragon spine transmission system of the fourth generation tank, Zhengxin's R&D engineers had experience in the development of hydraulic systems.
Combining these two points together, Li Fanyu does not need to worry too much about the project of controlling the system.
So after the development direction of the universal platform was determined, he came to Wang Yu. Participated in the research and development of aerial ladders, elevating platforms and elevating spray arms.
These three things seem to be nothing. But if you really think that there is no technical content, you would be wrong. On the contrary, these three types of top-mounted machinery are the most important things for heavy fire trucks.
The ladder is essentially a telescopic device, the lifting platform is a telescopic and folding arm device, and the lifting arm is a telescopic frame with a water cannon mounted on the folding arm.
But Comrade Wei Zheng of the Tang Dynasty summed it up very well-those who are good at beginning will achieve success, and those who can overcome the end will overwhelm the few.
Things that seem simple and easy to acquire are actually the most difficult!
Not to mention the climbing platform and the lifting arm that require a hydraulic steering structure in the middle, let’s talk about this ladder.
What kind of structure is needed to ensure maximum strength?
What kind of design should be used to allow the ladder to have a greater length and a smaller footprint?
What kind of layout is needed to ensure that the ladder can overcome wind resistance and ensure a low swing amplitude when the height is often tens of meters or even hundreds of meters?
What kind of telescopic method should be used to allow the ladder to expand quickly and reach the working height?
These are all problems that need to be overcome!
Are there any ready-made designs?
Yes!
Germany, Japan, the United States, Switzerland, Australia and other countries all have relatively advanced firefighting ladders, with a wide variety of ladder structures and telescopic methods. But patents belong to others, and they cannot be used without patent fees.
And even if it could be used, would Li Fanyu know how to use it?
Of course not!
How can the R&D level and technical level of an enterprise be reflected?
Create a standard for the market!
What he wants is a standard unique to righteous faith.
Fortunately, he also has a killer weapon that no designer in the world has - design expertise. After reviewing a large amount of information with his team, he decided to create a special ladder.
The currently widely used ladder structure is a concave telescopic type. That is to say, the ladder is designed from bottom to top in a link-by-link manner for rapid deployment. Except for the hydraulic rod set used above, the principle of this game is similar to that of a stick swing.
As for the structure of the ring, after the ladder is unfolded, it can also take a shape similar to that of a swing stick - thicker at the bottom and thinner at the top. This form ensures that the volume and weight of the lower part of the ladder is higher than that of the upper part. It is helpful for the ladder to remain stable under wind resistance.
It can be said that the concave ladder structure can not only ensure the volume of the ladder in the collapsed state, but also can quickly expand and contract, and can also obtain a more reasonable mechanical structure after unfolding. As the basic materials have evolved from steel to high-strength aluminum alloys, ladders with this structure have evolved over decades and have become very perfect in design.
With decades of accumulated technological achievements ahead of him, it is not easy for Li Fanyu to break the rules.
However, Li Fanyu found inspiration from a child's toy.
What toy?
Most children born around 1990 have played with a telescopic toy gun. It is a gun handle with an airliner. The front is a very simple modified structure formed by a combination of levers, and there is a small rubber fist on the front. Pull the trigger, and the closed transmission structure opens and closes into a diamond shape, like a fist punching out suddenly.
It was this telescopic transmission structure used in toy guns that gave Li Fanyu a bold idea!
Although the concave telescopic ladder is currently the most reasonable ladder structure, due to structural limitations, the expansion speed of this type of ladder is still not very fast. Using various advanced hydraulic groups can only add a small speed buff to this structure.
But more advanced and complex hydraulic transmission devices mean higher costs and more complex structures, which means lower reliability.
But if a telescopic gun is used as a simple lever group, the complexity is simplified, and simpler physical principles are used, what effect will it bring?
Simpler structure!
Lower manufacturing costs!
Faster telescopic closing speed!
Lower drag coefficient!
When Li Fanyu proposed this idea, the engineers were stunned,
This principle is feasible, but it is extremely difficult to implement! Fire-fighting equipment is suitable for use in emergencies and uses new unconventional structures. First, there are no ready-made cases to follow, which means that a lot of research and development energy and resources are required. Second, the unconventional ladder structure has not been tested in fire accidents and is difficult to be accepted by people.
Li Fanyu’s attitude towards these doubts is very clear,
“All perfect things are the result of innovation.”
This sentence was said by the famous economist and philosopher Mill in the 19th century. But what he said from Li Fanyu's mouth was quite convincing.
Because in this time and space, Zhengxin has been able to achieve its current achievements because of breaking the rules again and again.
But words cannot solve all the doubts. No ear can be completely convinced by the mouth. To prove that your point of view is correct, you can only speak with facts.
After putting forward the idea, Li Fanyu spent one night designing a triangular telescopic ladder model with three lever groups combined together. The shape of the model looks weird. When it is closed, it is a trapezoid when viewed from the side, and it is a triangular cross-section when viewed from top to bottom. When it is closed, it is only two meters wide and one meter long.
I am used to seeing concave telescopic ladders with sharp edges and corners, but this thing is simply ugly.
But when the model is made and assembled according to Li Fanyu's design, the situation is different.
After unfolding, this thing can reach a height of ten meters!
The scaling ratio reaches one to ten!
Moreover, when fully unfolded, the appearance of this thing is simply stunning. How to describe it?
The fully unfolded ladder model looks like a pair of beautiful legs wearing mesh stockings!
In a comparative test with a concave ladder model of the same height, the ladder model dubbed "beautiful legs" by Li Fanyu completely crushed the conventional concave ladder model in terms of volume, expansion and contraction speed, wind resistance coefficient and mechanical strength!
The engineers were completely convinced.