FWF Chapter 151
Chapter 151
Chapter 151
After checking the data and knowing which aspects are the problem, then the next thing is much simpler. The bearing temperature is too high, and the problem is most likely in two places.
First of all, it is the bearing itself. Due to 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 ascension of the bearing temperature and 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 themselves. The precision level is very high, even compared to the highest precision bearings on the market. It is much higher, reaching the first-level classic level. At the same time, after being processed, it has undergone many inspections. Finally, before installing the engine, the engine installation engineer will also perform the best bearing on the bearing. Strict inspections will only be installed on this engine until it meets the standard, so there is absolutely no possibility of problems in terms of precision.
As for the material, it is even more unlikely that there will be problems. After all, the material used in this aircraft engine bearing is also a high-performance bearing steel material produced by their Tiangong Technology. According to the performance, it can be at a temperature of nearly two thousand degrees. , Normal work.
Although the temperature in front of the turbine will reach two or three thousand degrees according to the state of the engine when it is running, it is obviously impossible for the temperature at the location of the bearing to reach this level under the action of the cooling system, and it is only one thousand at most. The temperature of 1°C is already very high, and it is impossible to exceed 2,000°C.
Thinking of poking the old man here, he has roughly judged which aspect is happening. 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’s test bench immediately to see if the cooling system appeared. What’s the problem.
After listening to Professor Poke’s words, the door of the control room was automatically opened, and the personnel in the control room also entered the workshop again.
At this time, perhaps he noticed that Wang Bin was not in a good mood, and Professor Poke comforted Wang Bin: “President Wang, please don’t worry. Judging from my experience, there are more than 90% of the problems that occurred this time. Probability is not the reason for the aviation development itself, but the reason for our test bench.
Because if it is caused by the engine itself, you don’t have to wait until now. There will be problems when the cruise power is turned just now. After all, the operating time under the cruising power just now has reached one 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 regard, in fact, this engine is considered a success according to certain standards.
Because under normal circumstances, it is impossible for an aircraft to fly in the afterburner state. After all, no matter what kind of engine it is, if the afterburner state is turned on, it will have extreme effects on both the engine and the aircraft itself. Big challenges will greatly shorten the life of the engine and the aircraft itself.
In addition, under normal circumstances, the afterburner state of the aircraft’s engine is basically different and lasts for too long. Basically, it can only last for a few seconds or even tens of seconds, even some of the very good ones now. The engine, if the afterburner is turned on, it will not last more than ten minutes. All our engines can last about three minutes in the strong combustion phase, which is already a very good level, so in fact, Our engine is already considered a success.
Of course, if you look at the data we designed before, this engine was actually unsuccessful, because in our design drawings, this engine will last at least 15 minutes to half an hour in the afterburning phase. , After all, the materials we use are not ordinary materials, but the best high temperature and high pressure resistant materials in the world. ”
After listening to Professor Poke’s words, Wang Bin did not speak, but just nodded. After all, he didn’t need to poke the professor. He also knew that, after all, he had made up a lot of knowledge in aerospace and aviation during this period of time.
What’s more, if you really follow the design data, 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, not only has first-level domestic combustion, There are second-level and third-level afterburning states.
According to the design data requirements, in the state of first-level afterburner, the engine must be qualified for at least fifteen to thirty minutes. At the same time, the thrust must reach more than 130 kN, and the second-level Afterburning, it must last for at least five minutes, the thrust must be at least 150 kN, the highest third-level afterburning, at least 15 minutes, the thrust must reach 170 kN The above will do.
However, this engine is not perfect at this time. In addition to the test bench and other reasons, this engine is still unable to enter the second third-level afterburning ability, but even so, it is actually turning on the first-level. The afterburning state is only a little more than three minutes, and it will not work. If it is really the cause of the engine, then it is obviously that the engine is not qualified.
Seeing these aviation development experts and young technology personnel being inspected in the workshop, Wang Bin not only silently prayed in his heart: “I hope it’s not the engine itself. Otherwise, the trouble will be big. There will be many follow-up plans. It will all be delayed or even overturned.”
At this moment, Professor Poke and said to Wang Bin again: “Mr. Wang! Let’s go to the workshop, too!”
Wang Bin nodded, and the two of them 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 in the workshop, Professor Poke asked an old man on the side.
“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 bed is not a formal test bed, and according to the previous construction estimates, this test bed can withstand the maximum thrust of only about 25 tons. If there is a slight error during construction, then the test bed There may be a problem! ”
Although Professor Poke has basically determined that there is a problem with the test bench, but for the engine part, no one dared to eliminate the engine part at this time. After all, the problem has not been found yet.
One minute and one second passed, and ten minutes passed quickly. Just as Wang Bin, Professor Piao and others gradually raised their hearts, a young technology personnel who was inspecting the connection between the engine and the test bench suddenly Called loudly: “The problem is found, the screw of the coolant pipe of the engine cooling system is loose.”
When everyone heard what the young technologist said, everyone’s heart was immediately relieved, and Professor Poke said, “Ok, now that the problem is found, I will immediately replace the engine and re-test. The link must be foolproof.”
After hearing the words of Professor Poke, these young technology personnel 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.