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After checking the data and knowing which aspects have problems, the next thing is much simpler. The bearing temperature is too high, and there are most likely problems in two places.

First of all, it is naturally the bearing itself. Due to the precision and material reasons, the friction coefficient is too large, which leads to heat generation, and the cooling speed of the cooling system is not enough, which leads to the rapid increase of the temperature of the bearing, resulting in overheating.

The second is the problem of the cooling system.

However, the bearings on their engine are not ordinary bearings on the market, but bearings processed by Wang Bin and Tiangong Technology. The precision level is very high, even compared to the highest precision level bearings on the market. It is much higher, and has reached the level of a classic. At the same time, after processing, it has also undergone many tests. Finally, before installing it in the engine, the engine installation engineer, that is, Professor Jao himself, will carry out the most stringent inspection on the bearings. It will only be installed on this engine if it meets the standard after strict inspection, so it is absolutely impossible to have problems in terms of precision.

As for the material, it is even less likely that there will be problems. After all, the material used in this aero-engine bearing is also a high-performance bearing steel material produced by Tiangong Technology itself. According to the performance, it can withstand a temperature of nearly two thousand degrees. , works fine.

Although it is said that according to the state of the engine when it is running, the temperature in front of the turbine will reach two to three thousand degrees, but under the action of the cooling system, the temperature at the position of the bearing is obviously impossible to reach this level, at most it will be one thousand The temperature is already very high, and it is impossible to exceed two thousand degrees.

Thinking of this, the old man has already roughly judged which aspect has occurred. He judged that there must be a problem with the cooling oil circuit system, so he immediately ordered to check the cooling oil circuit of the engine and the test bench to see if there is any problem with the cooling system. what's the problem.

After hearing Professor Zha's words, the door of the control room was automatically opened, and the personnel in the control room entered the workshop again.

At this time, maybe he noticed that Wang Bin was not in a good mood, so Professor Pok comforted Wang Bin: "Please don't worry, Mr. Wang. According to my experience, there are more than 90% of the problems that have occurred this time. The probability is not the reason of Hangfa itself, but the reason of our test bench.

Because if it is caused by the engine itself, there is no need to wait until now, when the cruising power transition just now, there will be problems. After all, the running time under the cruising power transition just now has reached an hour!

What's more, in the afterburner test just now, this engine has persisted for three minutes. Even if there is a problem in this area, in fact, according to certain standards, this engine can be considered a success.

Because under normal circumstances, it is impossible for the aircraft to fly under the afterburning state. After all, no matter what kind of engine, if the afterburning state is turned on, it is extremely important for both the engine and the aircraft itself. Great challenges will greatly shorten the life of the engine and the aircraft itself.

In addition, under normal circumstances, the engine afterburning state of the aircraft is basically different and lasts too long. Basically, it can only last for a few seconds or even tens of seconds. The engine, if the afterburner is turned on, it cannot persist for more than ten minutes. All our engines can last for about three minutes in the power combustion stage, which is already a very good level, so in fact,

Our engine has also been considered a success.

Of course, if we look at the data we designed before, this engine is actually unsuccessful, because in our design drawings, this engine should last at least fifteen minutes to half an hour during the afterburning phase. , After all, the materials we use are not ordinary materials, but the world's best high temperature and high pressure resistant materials. "

Hearing what Professor Zha said, Wang Bin did not speak, but just nodded. After all, Professor Zha didn't need to say these things, and he knew it well. After all, during this period of time, he had acquired a lot of aerospace knowledge.

What's more, if the design data is really followed, this is only a first-level afterburner. You must know that although this engine is only a first-generation engine, this engine is not simple. Level 1 and Level 3 afterburner states.

According to the requirements of the design data, in the state of the first-level afterburner, the engine must persist for at least fifteen to thirty minutes to be considered qualified, and the thrust must also reach more than 130 kN, while the second-level afterburner Burning must last for at least five minutes, and the thrust must reach at least 150,000 Newtons. The highest level of afterburning is at least 15 minutes, and the thrust must reach more than 170,000 Newtons. .

However, this engine has not been perfected at this time. In addition to the test bench and other reasons, this engine is still unable to enter the second and third afterburning capabilities at this time, but even so, it is actually turning on the first afterburner. The state of combustion is only a little more than three minutes, and it is not good. If it is really the cause of the engine, then it is obvious that the engine is not qualified.

Seeing these aviation development experts and young technicians who were inspecting in the workshop, Wang Bin not only prayed silently in his heart: "I hope it is not the cause of the engine itself, otherwise, it will be a big trouble, and many follow-up plans It will be delayed or even reinvented.”

At this moment, he poked the professor and said to Wang Bin again: "Mr. Wang! Let's go to the workshop to have a look too!"

Wang Bin nodded, and the two walked out of the glass control room, entered the workshop, and came to the test bench.

"Old Dai, did you find any problems?" After arriving at the workshop, Professor Po asked an old man beside him.

"No problem has been found for the time being, but according to my estimation, there should be a problem with the test bench.

Because this simple test bench is not a formal test bench, and according to the previous construction estimates, this test bench can withstand the maximum thrust, only about 25 tons. If there is a slight error during construction, then the test bench There may be problems! "

Although Professor Zha and the others have basically confirmed that there is a problem with the test bench, as for the engine part, no one dares to rule out the engine part at this time, after all, the problem has not been found yet.

Time passed by every minute and every second, and more than ten minutes passed quickly. When Wang Bin, Professor Chi and others gradually raised their hearts, a young technician who was checking the link between the engine and the test bench suddenly He shouted loudly: "I found the problem, the coolant pipeline screw of the engine cooling system is loose."

When everyone heard the young technician's words, everyone's hearts were relieved at once, and Professor Zha said: "Okay, since we found the problem, we should replace the engine and retest immediately. The parts have to be perfect.”

After hearing Professor Zha's words, these young technicians immediately found a hydraulic cart dedicated to lifting the engine, and hurriedly unloaded the engine on the test bench and installed a new one. engine.

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