super robot clone

In the aviation industry, there is a saying that has been widely circulated: if the aviation industry is the crown of a country's manufacturing industry, then the aero engine is the brightest pearl in the crown.

The production and development costs of aero-engines are very high. Therefore, how to reduce the material cost and manufacturing cost of parts without affecting the service life of the engine has always been a very big difficulty.

Due to the limited technical level, the service life of turbine components of military aero-engines is generally stipulated in China to be no less than 2000 hours, while the service life of foreign military aero-engines is basically more than 10000 hours.

However, Chen Xin's requirements will only be higher if the steel 镚 is used to manufacture f119.

Chen Xin put steel ingots, nickel plates, vanadium pentoxide, titanium powder and other materials on the work table by category, and said to the steel smith who was watching these metal materials with his eyes shining: "Steel smith, let's go! "

Gang Bian nodded, excitedly said: "Old Dou, look at mine!"

As it spoke, its body made a clicking sound, and quickly melted like mercury, turning into a pool of flowing liquid on the stainless steel operating table. This pool of liquid spread towards the metal material in front of it like a living thing.

The moment the metal material comes into contact with the liquid, it melts at a speed visible to the naked eye, as if ice cubes encountered boiling water.

The turbine disk to be manufactured by the steel 镚 is also called the "turbine blade disk". That is the meaning of x-level blades), mainly responsible for dredging air, pre-compression, etc.

In the early days, the "plate" and "fan blade" were separated, and they were mainly joined together by tenons.

In the 70s, turbofans and other engines in the United States, Britain, and the Soviet Union adopted the "integrated disk" (or integral disk) technology. General Motors of the United States first completed the productization. In the 80s, projects such as f22 and f35 promoted the development of integral disks. .

Turbine blade disc is the core technology of engine processing technology. The basic requirements are "uniform, pure, dense, light, strong, heat-resistant, tensile-resistant, and pressure-resistant". The turbine discs of high-thrust military turbofan engines generally use Nickel-based or titanium-based high-temperature alloy materials are the current mainstream. The so-called nickel-based and titanium-based materials are actually a type of alloy steel, just like lithium-based materials for large aircraft.

In fact, the materials used in the turbine disk are not limited to these, from the early common alloy steel to the later nickel-based and titanium-based single crystal alloy materials to composite matrix and ceramic-based materials.

The composite base material is mainly carbon fiber composite base material. This material is relatively difficult to obtain. It was first experimented by the British in the 50s and 60s. Later, because the tensile force of carbon fibers was too large, the fan blades would deform when the fan speed was fast. As a result, the British People fail after paying sky-high prices.

Due to the wrong technology tree, the British began to lag behind the Americans in the research on turbofan engines.

Of course, this has something to do with the overall national strength of a country. Americans were rich and capable at the time, and they were developing n types of engines with n different technical routes at the same time, so they were not afraid of stumbles.

As for the ceramic-based turbine disk, this technical difficulty is higher, which represents the development direction of aero-engines with a thrust-to-weight ratio of 20 in the future.

At present, the progress of the Europeans is not clear, but the Soviets have done it. It is not known whether the Japanese have left the laboratory.

The only thing Chen Xin knows about is the "Comprehensive High Promotion Project" experiment in the United States, and it is said that the effect is good.

The so-called "comprehensive high promotion" is not to develop an engine, but to explore engine development technology (Americans lead the world in technology because they have decades of consistent large-scale sustainable basic investment, not only Investing only for the weapon model, and spending huge sums of money on the basic theory and its engineering), the ultimate is to explore the feasible technology of the turbofan engine with a push ratio of 1:20.

As for whether all the research institutes in China's aviation industry are working on this project, Chen Xin is not particularly clear.

………………

After the metal material was almost absorbed by the steel forge, the area of ​​the pool of liquid on the operation table also expanded a lot, but it never overflowed the operation table.

Soon, these liquids became active and began to gather gradually, a disc-shaped outline appeared in the middle part, and then, this outline gradually became clear, and the shape of leaves appeared on the periphery.

This section is basically the directional recrystallization process of metal alloys. The interatomic metal bonds are continuously broken and reorganized to form an extremely stable crystal structure. With the effective intervention of steel, the transverse grain boundaries that are sensitive to voids and cracks are basically eliminated. , revealing the most perfect form of the metal alloy.

In less than 5 minutes, the turbine disk of the F119 engine was manufactured. After all the turbine parts were formed, the steel forge absorbed all the remaining liquid metal and digested it as food.

At this time, what appeared on the operating table was a turbine part that could be called a work of art, with a silvery luster on its surface, and all the blades were evenly distributed around it. When Chen Xin touched it with his hands, the surface was smooth. Strict, do not feel any roughness.

Chen Xin put the turbine disk aside, and then asked the steel to continue making the next part.

The f119 engine is mainly composed of a 3-stage fan, a 6-stage high-pressure compressor, an annular combustion chamber with aerodynamic nozzles, a floating wall flame tube, a single-stage high-pressure turbine, a single-stage low-pressure turbine with the opposite direction of the high-pressure turbine, an afterburner and a two-dimensional Vector nozzle and other composition.

Gangzheng divided the whole engine into 6 units including fan, core machine, low-pressure turbine, afterburner, tail nozzle and accessory drive case, and there are also accessories, fadec (full authority digital electronic controller) and The engine monitoring system is manufactured step by step according to the sequence of assembly.

Due to the large number of parts, Chen Xin couldn't remember them at all, so he could only let the steel to make some core large parts first, and then slowly assemble them while making smaller parts.

For two whole days, apart from eating and sleeping, Chen Xin kept assembling f119. Fortunately, with the help of "Little Butterfly", he was able to survive.Gang Beng was also restless, and both of them could be said to have devoted all their energy and attention, and finally assembled the first f119 engine at [-] o'clock the next night.

After the last part was installed, Chen Xin stared dazedly at the outstanding handicraft in front of him, feeling that the two days and two nights of hard work were totally worth it.

It is estimated that no one would have thought that on a certain night in June 2011, someone actually manufactured the world's most advanced aero-engine in a workshop-like warehouse.

Chen Xin first measured the shape data of the counterfeit version f119. The maximum diameter is 1.13 meters and the length is 4.826 meters, which is basically the same as the prototype.

Chen Xin said in surprise: "Gangbang, what's going on? Why are the weights different?"

The steel penny cut a small piece from the nickel plate piled up on the side, chewed it in his mouth, and said nonchalantly: "Old Dou, are you looking down on the steel penny? Isn't it just to lose a hundred kilograms? Don't worry, the surname can go up." There won't be any decline, maybe there will be an increase."

Chen Xin quickly calculated in his mind that the American version of the f119 engine has an afterburner thrust of 155.7 kN, a weight of 1460 kg, and a thrust-to-weight ratio of 10.88. If the weight is reduced by 100 kg and the thrust remains the same, the thrust-to-weight ratio will reach an astonishing 11.68.

You must know that the thrust-to-weight ratio of the engine is the core data of this engine, which is extremely important for a fighter.

Generally speaking, the engines used by the third-generation fighter jets, such as the old American f110 series, al31f series, and China's "Taihang", basically have a thrust-to-weight ratio of around 8, while engines with a thrust-to-weight ratio of 10 are generally Usually used in fourth-generation fighter jets, there are currently only two engines, the F22 series equipped with the old American F119 Raptor and the F35 equipped with the F135.

As for the European twin winds (Typhoon fighter jets and Rafale fighter jets), the thrust-to-weight ratio of the ej-200 and m88 medium-thrust engines they use is only about 8.5.

So if China's J-20 is equipped with an engine with a thrust-to-weight ratio of 11.68, it can completely blow up the F22 of the US emperor.

Chen Xin worked with Gangbi to hoist the F119 engine onto the test bench, and then opened the warehouse door. After Gangbi searched and reported that there was no one else within a kilometer range, Chen Xin waved: "Gangbi, get ready for a test run!"

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