Li Tianfeng and Long Yingshi walked to the assembly bench of this engine together, and Li Tianfeng watched the workers seriously assembling it. "Top" point "small" said, x.

It can be seen that the assembly of this engine is nearing the end, and the workers are assembling some pipes, cables, etc. outside the engine, and after installation, they are tightened one by one according to the process requirements, and each bolt and nut has tightening torque requirements.

The workers take the torque wrench, according to the pre-adjusted torque, screw the nut into place, and then, the lock lock plate is bent according to the requirements, close to the side of the nut, there are some nuts, there is a small hole on it, through a small steel wire, with a special tool to screw the small steel wire, fix the nut, and use the wire cutter to cut off the excess steel wire.

Aero engine, nuts and bolts must not be loosened, a point of loosening will fail, nuts and screws are loose and failing, and the parts that are not well assembled in place will be loose and fail, once such a situation occurs, the consequences are unimaginable.

All, the bolts and nuts on the aero engine should fully consider the locking requirements, and a series of locking measures have been taken in the assembly process to prevent loosening, such as using cleats to lock, using the same fine steel wire locking, and even using self-locking nuts or left-handed nuts.

The so-called self-locking nut is a nut that does not need to be locked with a lock piece or steel wire, and will not loosen after tightening, however, at present, the real self-locking nut needs to be imported, and the price is very expensive, a small, a few millimeters of self-locking nut will cost hundreds of pieces, and it is difficult to buy.

There are many rotating parts on the aero engine, such as fans, compressors, turbines, etc., and the nuts of these parts are locked with cleats. There are also those that use left-hand nuts.

The left-hand nut is relative to the right-hand nut, the nut we see is generally the right-hand nut, and the left-hand nut will become tighter and tighter as the parts turn in the opposite direction because it is in the opposite direction of the general nut and the rotation direction of the engine rotating parts. So as to achieve the purpose of locking.

This is the locking of the nut bolt on the aero engine, and the locking of the nut is also very common in civil machinery products, the most common is to install a spring pad, and use the elastic force of the spring pad to achieve the purpose of locking.

However, the locking reliability of the pad is poor, and there is a danger of failure with vibration, or long-term use. Aero engines are generally used less often.

Li Tianfeng looked at it for a long time, his face was a little excited, just now, watching the workers assemble, bend the lock plates, etc., Li Tianfeng thought of a new self-locking nut.

If the self-locking nut currently used in the world belongs to the first generation, Li Tianfeng thought that this self-locking nut belongs to the second generation. Even the third generation is much more advanced than the current self-locking nuts. The technical content is also much higher.

Even if the current self-locking nut belongs to the first generation, but the domestic can not really be manufactured, even if it is manufactured, it is also a defective product, and the domestic self-locking nut is generally not used on the aero engine, but often uses imported goods.

Long Yingshi next to him seemed to notice Li Tianfeng's expression. I couldn't help asking, "Tianfeng, what's the matter, so happy?" ”

Li Tianfeng was really happy, but he didn't expect to take a walk in the assembly workshop of Factory B, and his head flashed. I thought of a good way to make money, and there is a broad market, especially in aviation products, which are widely used.

Li Tianfeng said with a smile: "Mr. Long, just now I saw that the workers had to bend the lock piece and stick it tightly to one side of the nut in order to lock the nut, which was very troublesome." ”

Long Yingshi sighed and said: "Yes, it is very troublesome, and it will be even more troublesome to disassemble it in the future, but there is no way, the nut must be locked, otherwise, there will be big things in the future?" ”

Li Tianfeng said: "Mr. Long, if there is a self-locking nut that can be locked by itself when it is installed, and it is very easy to disassemble, what will happen?" ”

Long Yingshi picked up a nut from the side, which is a self-locking nut imported from France, Long Yingshi said: "Tianfeng, you are talking about this kind of nut, but this nut assembly technology is very demanding, and the disassembly is more time-consuming, in addition, the price is still very high, we generally use less, only use this nut in some key parts." ”

Li Tianfeng shook his head and said: "What if there is a more advanced self-locking nut than this, with the highest reliability, more convenient assembly and disassembly, and the price is not so expensive?" ”

Long Yingshi said in surprise: "Tianfeng, where is this kind of nut, if there is really such a good self-locking nut, then the nut locking on our aero engine will be fully updated." ”

Li Tianfeng nodded, thinking, of course there is, and it is still known as the "nut that never loosens", even if the working environment is harsh, no matter how bad the vibration is, it will not be loosened, in Li Tianfeng's memory, this kind of nut is widely used, not only used in aero engines, but also used in military equipment, civilian products, after strict tests, truly known as "never loose nut".

A nut that never loosens!

I believe that as long as it is an aero engine, you will know the use value of this nut, Li Tianfeng is not worried about the market of this nut at all, Li Tianfeng thought to himself, after going back, he will definitely make this kind of nut out, and apply for a patent as much as possible.

Applying for a patent, not worried about being imitated, this kind of nut is difficult to be imitated, that is, to get a sample, do not master its core technology, it is difficult to be imitated, even after some efforts, spend a lot of manpower and material resources to imitate it, but also the effect and reliability are greatly reduced, can only be regarded as defective products.

Thinking of this kind of nut, Li Tianfeng only visited the assembly workshop of Factory B, and even stopped looking at the key test workshop, and also declined Long Yingshi's invitation to have lunch together, and took a taxi back to the hotel where he stayed.

Wang Ruobing didn't come back for the time being, and Wang Juan was with him, Wang Ruobing sent a text message to himself, and Li Tianfeng didn't ask Liu Wei and Zeng Qinghai, who had just arrived, to report to work, but just arranged a little for everyone to contact Factory B. Didn't Li Tianfeng and Ling Qianli initially reach a processing business intention of more than 20 million, and the specific affairs need to be handled by Liu Wei and others.

After explaining everyone's work, Li Tianfeng went back to his room, found paper and pen, and drew a sketch of this nut with his memory.

This kind of self-locking nut is different from ordinary nuts, the internal threaded hole of the nut is divided into two parts, there are a few buckles that are normal shapes, and the other few buckles are slightly oval, and there is a little eccentricity, the locking is by these buckles are different from the threads, and the technical content is also on these buckles.

How about elliptical strokes, how much eccentricity, this is the core technology, don't look simple, in fact, the things contained in it are not simple at all, Li Tianfeng remembers, in that time and space, there are no more than three companies in the world that can really manufacture this kind of nut.

Li Tianfeng drew a sketch, the specific technical parameters, and the production and manufacturing process of this nut in the future, these things, Li Feng has to carefully scrutinize.

Put away this sketch of his own and put it in his gift bag, this kind of thing, Li Tianfeng is not afraid of losing it, it is just a sketch, and there is no specific size and parameters, even if others take it, it is useless.

After putting away the sketch, Li Tianfeng took a look at the time, it was already past one o'clock in the afternoon, Li Tianfeng couldn't help but smile, he didn't forget to sleep and eat, and he even forgot the time to eat.

took out his mobile phone and looked at it, because just now in order to concentrate on sketching, Li Tianfeng's mobile phone was silent, Li Tianfeng saw that there were multiple missed calls, Wu Teng made five calls, Xiong Haibo made three calls, and in addition, there was one Liu Wei.

Li Tianfeng thought to himself, Wu Teng and Xiong Haibo must be full of curiosity about themselves, and they can't wait to catch themselves immediately and ask what is going on.

Thinking of this, Li Tianfeng smiled slightly, and sent a text message to both of them, Li Tianfeng had a treat in the evening, I believe that the two of them will definitely rush over, and they will come over quickly, maybe Liu Kaiqi will also run over.

After sending a text message, Li Tianfeng was about to call the general service desk and call something to eat, at this time, there was a knock on the door, Li Tianfeng was slightly stunned, and thought, it is more than one o'clock in the afternoon, it is the lunch break, who will come over.

When I opened the door, there was a smiling Liu Wei standing outside the door, followed by a waiter pushing a dining cart behind Liu Wei.

Liu Wei smiled and said: "Boss, I originally wanted to ask you to come over for dinner together, but I was afraid of disturbing you, I guess, now you should be busy, I took it upon myself to order a few dishes for you to send over." ”

Li Tianfeng was overjoyed, and thought to himself, Liu Wei is really considerate, knowing that she didn't eat, she sent something to herself, so Li Tianfeng said happily: "I'm just hungry, please come in." ”

Liu Wei asked the waiter to push things in, these were four dishes and one soup, two meat and two vegetables, and a big bowl of white rice, which were properly matched, and Li Tianfeng was very appetizing at first glance.

"Boss, is it enough, or I'll call a few more dishes to be delivered." Liu Wei asked.

I was already a little hungry, and after the waiter set these things up, Li Tianfeng picked up the chopsticks and said while eating: "Enough, enough." ”

If you are alone, it is really enough, and this dish is good, Li Tianfeng likes it, and he is happy while eating.

Seeing that Li Tianfeng was so happy, Liu Wei also smiled happily, and then saw that Li Tianfeng's room was a little messy, and was busy cleaning up Li Tianfeng.

Watching Liu Wei clean up his room, Li Tianfeng suddenly felt a warmth in his heart, and his heart was also very strange, how could he suddenly feel this way.

Li Tianfeng even thought to himself, Liu Wei is a good woman, beautiful, mature, and capable.

Li Tianfeng was thinking like this, and there was another knock outside the door, and with the knock on the door, a very cheerful voice came in: "Tianfeng, open the door quickly, open the door quickly!" ”

…………

Today's third watch, the third watch is sent, do you have a monthly pass??? (To be continued......) R640