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No one would have thought that the turbofan team would make the accuracy reach such a harsh level when designing.

This is assembly accuracy, not processing accuracy.

The original design was not like this. The initial design was actually 002 mm. After Liu Yijiu intervened, he directly increased the assembly accuracy requirement by nearly twenty times!

This is almost impossible for the design team and the assembly workers.

Even testing is difficult to detect.

However, Liu Yijiu insisted on achieving such a level of accuracy, and no objection to the design team was effective, so the assembly workers could only do their best to complete it.

Such assembly accuracy depends on whether it is seen with your eyes or equipment to detect. During the assembly process, it is difficult to use detection equipment to correct deviations. It depends on the feeling that the nine-level assembly fitters have accumulated decades of work experience.

This is not only the feeling of the brain and inner heart, but also their feel!

"Director Liu, this accuracy is impossible to achieve at all!" Qi Hai saw these workers installing and disassembling, but they were unable to meet Liu Yijiu's requirements. Although the accuracy has been improved every time, it only made the assembly accuracy reach 001 mm, which is several times worse than the minimum 0003 required by Liu Yijiu. "If this continues, the assembly of the engine will not be completed by time."

Qi Hai felt that the accuracy that can be achieved in front of him had far exceeded their requirements and was more than doubled.

"Who said these masters of assembly can't be achieved?" Liu Yijiu asked Qi Hai very seriously. "None of them said they couldn't be achieved. You are not a professional assembler, why are you anxious here?"

"I'm worried that always installing and disassembling like this will damage these parts. With such concentricity requirements, there is basically no gap. The gap of one-sided 00015 is really..." Qi Hai has his own concerns.

"The assembly accuracy of the impeller is related to the performance of the entire engine. The higher the assembly accuracy, the smaller the possibility of the engine vibrating. After assembly, we cannot detect the multi-stage impeller assembled inside. Even if it is tested, what can it be? Can it be repaired in the end? How can the strength be guaranteed after repairing?" Liu Yijiu asked Qi Hai in reverse.

His theoretical knowledge is much richer than that of Qi Hai.

The weight difference between all blades and blades on each impeller will never exceed 10 grams, which is guaranteed by processing accuracy!

This is why there is still a processing after assembly. I am worried that the differences in the materials accumulated on the welds during welding will increase the weight gap between the positions of these blades, and avoid the weight of the engine's impeller when rotating at high speed due to different weights. The shape difference is too large and the centrifugal force is generated, which will cause the engine vibration.

Even the current assembly accuracy has reached an almost harsh level, which is to reduce the vibration caused by centrifugal force generated during engine operation. This does not greatly improve the performance of the engine, but it does have a huge enhancement to the service life of the engine.

To this extent, it is basically meaningless to say that data is.

This kind of micro-negligible data is the most advanced manifestation of a country's manufacturing capacity.

"What's more, the assembly surface of all parts of the core components only leaves such a large gap range, and at the same time, the surface roughness reaches the highest level that our equipment can reach in machining 04. Otherwise, would you think I would ask District 3 to design and develop such grinding equipment? At the same time, it also requires District 4 to develop such an accurate laser detector?" After Liu Yijiu said this, he ignored Qi Hai.

Instead, he ran to the assembly fitters who were carefully assembling the impeller, without saying a word, and silently watched them as they assembled.

Liu Yijiu was powerless to do anything about this and could only silently magnify these top masters in the Republic, although he knew that this put a lot of pressure on them.

If it is the overall turbine disc they produce, the assembly will be much less difficult.

Time, as time continues to be installed and removed, day after day, the assembly accuracy can no longer improve after passing the 0005 mm hurdle.

"Okay, let's do it for the time being!" Liu Yijiu was very happy about this accuracy, but he didn't show any of it on his face. Instead, he still looked like he couldn't meet the requirements. We just barely just wanted to do it now.

"Director Liu, I'm really sorry, we..." The four fitters who assembled the fans said to Liu Yijiu with annoyance.

"At present, this situation cannot be improved if it continues. Just like this, our engine can no longer wait. Moreover, you have done your best. Your progress in the past ten days is very obvious..." Liu Yijiu comforted the four haggard old technicians, and then said to Qi Hai, "Let the next department continue to assemble, and the assembly of various parts outside, pressure reducing valves, fuel testing equipment, transportation equipment, and electrical equipment continue. After completing it, conduct the test. If there is no problem, after returning, conduct the test, then directly participate in the acceptance test..."

The engine production process is extremely troublesome.

However, engine inspection and acceptance test are even more troublesome.

According to regulations, the assembled engine will be transported to the test workshop for preliminary testing. Generally, the engine is directly supplied with oil on the ground experimental platform. After running for a period of time, there is no problem, then return to the production workshop and disassemble the entire engine to form a single part state. Of course, some parts can be inspected without disassembly, so there is no need to be such trouble. It is mainly for electrical aspects.

The disassembled parts will return to each assembly department, clean with gasoline, and then inspect. If there is a fault, the cause of the fault must be analyzed immediately, processed, and then reassembled.

Even so, these engines can not be installed directly on the butt of the fighter plane and push the fighter plane to soar towards the sky.

There is also an acceptance test, which is also conducted on the ground platform of the test workshop.

The test process is all monitored by electronic information, that is, connecting the engine to the equipment in the test workshop to establish a local area network, and feeding it to the monitoring computer with special software in the monitoring room. Simply put, it is actually a platform that simulates fighter jets in the ground workshop. The engine works on the platform, just like a pilot can detect the operating status of the entire engine in the cockpit. However, the data detected by this acceptance test is more and more detailed than that of the pilot.

Everything in the engine is run through external inspections, such as ignition, accelerator, etc. At the same time, the speed of the impeller, the air pressure of the air inlet, the thrust it can be provided, etc. are automatically detected and fed back to the computer.

Each of these data will be collected and used to build a database.

This monitoring software was developed after the completion of the WS-6 and was constantly being improved.

In the acceptance workshop, Liu Yijiu, who looked serious, gave Qi Hai the right to issue orders. He is the chief designer and also served as the chief engineer.

"Turbofan-8,01 test drive ignition, countdown, 10,9...2,1, ignition!" Qi Hai didn't say much, nor did he look at the time, and after repeated confirmation that the engine ignition experiment was completely fine, he issued an order.

Although several turbofan-8s have been produced before, that was not successful.

Liu Yijiu asked to use this machine directly as No. 01.

This is the first engine used in the Republic for fighter jets, not a test item, but a finished product!

"Buzz buzz..." Under the control of the operator in the monitoring room, the start button was activated. Through the glass window, you can see that the first-level fan in the front of the engine on the experimental platform began to slowly rotate under the power of the reserve.

At the same time, on the computer display screen in the detection room, the data of various engine-related equipment began to change. Some were displayed in curved graphics on the coordinate system, and some were displayed directly in data...

Liu Yijiu and others stood less than half a meter behind the monitoring personnel, staring at the data above and staring at the engine in the glass window.

"Give oil!"

"Boom! Boom! Boom!" As the impellers at all levels of the engine rotate faster and faster, the aviation fuel, which was originally liquid, turned into a state of fog by the impellers at all levels and the pressure generated by them, and finally entered the combustion chamber.

The electronic ignition equipment works from the beginning, igniting the aviation fuel with low pressure inside. After the fog that has been sprayed into the combustion chamber enters, the flames in the original combustion chamber become more intense.

The tail of the engine was originally just an orange-red flame, and the color began to gradually fade. In the end, the engine's throttle opened to the maximum and the color was almost blazing!

"Try starting to get the extra force!" After running for dozens of minutes, Liu Yijiu said to the controller.

"Woo woo..." The impeller speed suddenly increased, causing the impeller rotation sound hidden by the roar brought by the flames ejected from the engine combustion chamber to be heard faintly.

"Boom boom boom..." The flame at the tail nozzle of the engine became lighter and closer to invisible.

At this point, the first turbofan engine in the Republic that truly is capable of installing third-generation fighter jets and allowing fighter jets to fly in the sky is successfully developed!

(To be continued.)
Chapter completed!