Rolling bearings look unremarkable, as if they are beads or cylinders stuffed in a ring, but in fact, a series of indicators such as ball number, ball diameter, gasket angle, inner and outer ring raceway groove curvature coefficient, radial clearance and so on will have a significant impact on the performance and life of the bearing, which need to be set according to different specific conditions.

The problems faced by domestic aviation bearings, or domestic bearings as a whole, are very complex, from manufacturing process, material level to design capabilities and other aspects.

In many cases, it is not even a simple lack of level, but a lack of adaptability, or a problem with the key parameters chosen.

Therefore, if a small bearing, if you really want to improve, it will involve many disciplines such as mechanics, mathematics, materials science, mechanical design, etc., which is really not something that Chang Haonan can solve alone.

What's more, now this effort, the domestic research group specializing in bearings, almost all of them are mechanical or vehicle disciplines, but the bearings used by aviation development are actually quite different from these places......

Ding Gaoheng's phone was quickly connected.

In fact, the normal process of finding Ding Gaoheng should go through his secretary, but Chang Haonan happens to be one of the few people who can directly contact him personally.

"Xiao Chang, what's the good news for me?"

"Director Ding, I would like to ask you to send a notice to several colleges and universities under the Commission of Science and Technology to inquire about the research and talent reserve of high-speed rolling bearings."

With the increasing frequency of contact between the two, it is no longer necessary to spend a few minutes in conversation each time, and any questions are just right to the point.

"High-speed rolling bearings...... What new projects are you working on? ”

Obviously, for Ding Gaoheng, who is accustomed to Chang Haonan's efficiency, even if the former creates some miracles, he can be mentally prepared.

"It's busy enough now, there must be no new projects, or is it a matter of our third-generation turbofan...... Remember when I asked you for the use and maintenance data of the aero engines last month? ”

Hearing this question, Ding Gaoheng suddenly came to his senses:

"Of course, remember, during that time, in order to collect materials for you, the general office added a shift for almost a week, and the science and industry offices and the equipment of the People's Liberation Army in various places were also tossed by your words, I guess, there are many people who say bad things about me behind my back."

Having said that, when he first heard Chang Haonan's slightly unreasonable request, he actually agreed without thinking about it.

Chang Haonan on the phone also half-jokingly responded:

"Don't worry, Director Ding, I've already analyzed it, and when those data are transformed into better equipment, the people below should remember your good ......."

Chang Haonan's name is basically quite loud in the military industry, especially in the aviation industry system, but there is actually a relatively separate relationship between users and their upstream R&D personnel, except for a very small number of special personnel who undertake test flights or tactical research and training tasks, in fact, few people care about what kind of process the equipment in their hands is designed.

Unless it's particularly easy to use like the Kalashnikovs of the past, or as difficult to use as the Type 21 combat daddy of the future.

In short, in most cases, no matter good or bad, the one who directly bears this reputation must be the Commission of Science, Technology and Industry for National Defense that is responsible for research and development, as well as the General Armament Department (or General Logistics Department) as Party A.

However, Ding Gaoheng obviously doesn't have time to pay attention to these now:

"It's been analyzed...... So much data, it took you more than half a month to analyze all of it? ”

Whenever he thought that he could face Chang Haonan with a normal heart, the latter would always be able to give him some new tricks.

Although the importance of relying on statistical means to rank research directions can be traced back to World War II, limited by the amount of data and the level of computation, the development of this field in the following decades is not obvious, and it is no wonder that Ding Gaoheng was surprised.

"Hmm...... Of course, it's not just me, there are other people who are responsible for entering data, charting and charting...... However, the conclusion is indeed obvious, the two sets of bearings in the front and rear of the rotor of the high-pressure compressor are the main failure factors of Hangfa, which can account for more than one-third of all the failure causes, which is not only a problem faced by our country, but also a problem faced by developed countries, so I hope to solve it on a new generation of turbofan engines. ”

In fact, Chang Haonan's analysis of these data does have a bit of artificial big data algorithms, and it is also largely due to his status as a reborn, so he really can't explain it in too much detail, so he has to quickly shift the topic to specific technical issues.

"I see...... But Xiao Chang, wait a minute, you may not need to send an announcement so troublesome......"

After Ding Gaoheng finished speaking, he put the telephone receiver on the table, picked up another phone that could only be connected to the internal line, asked the secretary to send him a file, and then continued to say to Chang Haonan:

"I remember that at the beginning of this year, the Ordnance Industry Corporation reported a relevant material, which was an application for the construction of the Bearing Industry Association......"

At the end of the 90s, as China's various products were gradually able to go abroad, the demand for standardization and organization in various manufacturing industries was also increasing, but the scale of several ministries and commissions in charge of the development of China's industrial field was shrinking, so many of these spontaneous industry associations were formed.

A few minutes later, Chang Haonan heard a knock on the door from the phone.

"That's right, there are several research groups at Bingcheng University of Technology and Northwest University of Technology that are working on this direction, and I will ask them to contact you as soon as possible."

……

The system of the Commission of Science and Technology is really not said in terms of efficiency.

Just two days later, a professor named Wang Qinli flew directly to the capital with two graduate students from the research group to meet Chang Haonan.

"Hello, Professor Wang."

The other party had already sent an email before he came over, so Chang Haonan knew that the other party was currently a professor at Bingcheng University of Technology and the head of the Department of Mechanical and Electrical Engineering.

Although he has to be called a position when working, there is still a small difference in status between him as a director and Ding Gaoheng as a director.

Even the signature at the end of the email puts the professor first, and it is clear that he values the title more seriously.

"Mr. Chang, I am so happy to be able to personally participate in our project this time."

Wang Qinli stepped forward quickly and shook hands with Chang Haonan with excitement on his face:

"Don't you know, during this time, several professors in our college have mentioned your name to me almost every day, as well as the multiphysics simulator."

"Oh?"

Chang Haonan, who heard about TORCH Multiphysics, was also interested:

"Do they have any comments or suggestions about this software?"

He knew that if he asked for a review directly, he would only get some rainbow farts of little significance, so it was better to be more direct.

"Well, in fact, everyone is still in the introductory stage, and most of the functions have not yet been learned, if you have to say it......"

Wang Qinli lowered his head and thought for a moment:

"I just hope to come up with some toolkits like MATLAB, especially for the production side and some users who only need to deal with simple problems, so that they can also start with the most basic algorithms."

This really hits the biggest shortcoming of Torch Company, that is, the software ecology has not yet been done.

Many MATLAB toolkits are not officially produced by MathWorks at all, but are written and distributed by users or other companies, so they can be found in almost all walks of life (although not all of them are easy to use), but Torch obviously does not have such conditions at the moment, and many of the tasks can only be done by themselves.

"This is indeed our main plan for the next phase, and this time I invited you to come with a similar idea, to design a high-speed rolling bearing dynamics analysis module for TORCH Multiphysics specifically for the bearing industry, and release it as a DLC for the software."

(End of chapter)