Take Off My Aviation Era

Yodel was shocked, and looked at the young technicians talking and laughing in front of the S-70 helicopter, his eyes became a little complicated.

　　 It’s not to blame Yodel for this, it’s because the integrated gear, shaft, and bearing structural components are not ordinary parts, but one of the most cutting-edge key components in the helicopter.

　　 Because of this key component, the main reducer of the helicopter has increased its service life from about 3,000 hours in the 1970s to more than 6,000 hours.

　　 has been doubled, which improves the overall performance of the helicopter, such as safety, adaptability, and maintainability, not a leap, but a flying over.

　　 As for what is the final drive?

　　 If the heart of a helicopter is a turboshaft engine, then the main reducer of a helicopter is the aorta connecting the heart.

　　Because of this, the helicopter with the main reducer is like a car with the gearbox. It is not important, but rather important.

Therefore, the quality of the main reducer directly reflects the performance of the helicopter. However, this thing is too complicated. The densely packed gears, bearings, and connecting shafts are tightly meshed together. Let alone the optimization of various gears and bearings. Design will make the designer's thick hair directly tired and bald.

What's more, these internal gears, shafts and bearings are all aviation-grade precision components, not to mention the time-consuming and laborious processing, but also a large amount of light and rigid materials. In short, the difficulty is no less than that of ordinary aviation. engine.

　　Because of this, only the United States and the Soviet Union can do a good job in the main reducer of helicopters in the world. Europe is a younger brother in this respect, and it needs to rely on American technology output to barely maintain the status of the so-called "helicopter development and production area".

　　 Even so, the quality of the main reducer is not the same. The top is of course the United States. The service life of most helicopters in the world is around 3000 hours.

　　 The life of the main power transmission components of the American Apache gunship has reached 8,000 hours.

　　 The Gulf War at the beginning of the year proved this point. In the Middle East desert zone where the climate is changeable and the sandstorm is severe, Apache helicopters have shown good continuous combat capability.

　　 Compared with the "Little Antelope" helicopters sent by France, the accuracy rate of the British "Lynx" helicopters is significantly worse.

　　 There is such a contrast, nothing else, because the United States has applied a new shaft-bearing-gear integration technology in the main reducer of their Apache gunship.

Take the originally separated shafts, bearings and gears as a whole using the unit design principle, and then use finite element software to model them to form a completed assembly model, and then use the design software to draw the picture, and then go through precision machining and complex Heat treatment, electron beam welding, laser welding and other advanced processes will produce it.

In this way, more than a dozen gears, shafts and bearing components in a certain part of the original final drive have been completely replaced by this compact structural component. In addition, a very precise processing technology is used during processing, which makes this part of the final drive The components of the device are not only simple in structure, convenient in maintenance, but also greatly reduced in overall structural weight.

　　 More importantly, because it is an integrated design, the degree of structural optimization is much higher than that of the original distributed component design. The lubrication effect is not only efficient, but with the suppression of overall vibration, the service life is instantly improved.

　　 A total of several such shaft-bearing-gear integrated components are applied to the main reducer on the Apache armed helicopter, saving nearly a hundred parts.

　　 not only allows the main reducer of the Apache gunship to transmit a high speed of 20,000 revolutions per minute, but the overall service life is also close to the turboshaft engine it carries.

　　 At the same time, it also makes the Apache gunship powertrain more compact and lighter, and reserves a lot of redundant space for subsequent armor protection and the installation of the future "Longbow" radar.

　　 So it is no exaggeration to say that the shaft-bearing-gear integration technology is a disruptive core technology.

In contrast, the Soviet Union is much inferior. It still uses the traditional separate design of gears, shafts, and bearings, and centralized optimization. It is no problem to use, but the service life is difficult to exceed 3,000 hours, and the daily maintenance is also very good. Inconvenience, the accident rate is high. As for compactness, don't even think about it. Compare the height of the Mi-28 and Apache.

　　 meters-28, 4.81 meters high; Apache 4.05 meters.

　　 The difference between the two is 0.76 meters.

　　 Regardless of the half-meter-high gap, putting it on the battlefield is equivalent to increasing the bombed area by several orders of magnitude.

　　 Don’t the Soviets want to make the Mi-28 gunship low and have a smaller bomb area? It's not that I don't want to, but I can't. For this reason, the technology is almost meaningless, and there is no way to balance compactness and service life.

　　 Europeans are better. The main reducer in the A-129 gunship produced in Italy has applied shaft-bearing-gear integrated technology.

It’s just that many of the core technologies of the Italian A-129 gunship were purchased from the United States, including the shaft-bearing-gear integration technology. The Italian contractor will design drawings of the main reducer of the A-129 gunship. Handed over to the United States, the United States helped to optimize the shaft-bearing-gear integration technology, and only then has the excellent power transmission performance of the A-129 armed helicopter.

　　 All in all, in a nutshell, the shaft-bearing-gear integration technology is the key to the renewal of helicopters. Even in Europe, where aviation technology is developed, it is absolutely at the forefront.

　　 Not to mention, the European "Tiger" helicopters have been in operation for several years, but the testable models have been delayed. What is the reason? It is not that the performance of the shaft-bearing-gear integrated technology applied to the final reducer is not up to standard, which delays the entire progress.

　　 What can't even be dealt with reasonably in Europe, can a backward and poor China make it? How can it be!

　　 "Mr. Yordle, Mr. Yordle?"

Just after Yodel was shocked, he finally digested Gu Jingyou's words, and with his rigorous analysis unique to the German nation, he completely denied that China did not have the ability to possess such key technologies~www.ltnovel.com~ the one was asked by him. The voice of concern from the leaders of Army Aviation interrupted Yodel’s myth.

　　 hurriedly smiled apologetically: "I just thought of something suddenly, it's okay... it's okay..."

　　 "If there is any discomfort, there is a doctor at the station, and I can help you to check it." The Army Aviation leader was still very concerned about Yodel's situation, and he waved his hand quickly: "No, no, I'm really fine."

The voice was over. Just as I was about to ask the leader of the Army Aviation Company about the shaft-bearing-gear integration technology mentioned by Gu Jingyou just now, I heard the sound of the helicopter propeller turning from outside the hangar, and I immediately asked Yodel to say something. I was interrupted. The Army Aviation leader on the opposite side also had a difference. They asked the accompanying officer around him. Then he smiled and said to Yordel: "A civilian helicopter just landed temporarily to add fuel. It was approved yesterday. "

　　Yordel nodded suddenly. It is common for civilian helicopters to land in military garrisons for supplies. There is no way anyone can make most helicopters of the short-legged type.

　　 So he subconsciously glanced at the airport outside the hangar. As a result, at this sight, Yodel immediately opened his mouth, almost subconsciously calling out: "S-64, aerial crane?"

　　 shook his head quickly: "No, it's much smaller than the aerial crane, this is..."

Before he could guess what model of the strange helicopter that was landing outside, he heard the young man named Zhuang Jianye who was not far away also cried out in surprise: "Why is the helicopter of our group coming here? "