Chapter 1009: True sea and air are linked
Faced with Chang Haonan's shock, Chang Shan's reaction was...
Even more shocked——
The former was shocked by the unexpected Someone is preparing to launch an all-electric verification ship so early.
The latter was shocked at how Chang Haonan seemed to know this stuff very well...
After the two stared at each other for a few seconds, Chang Shan said while thinking:
"Integrated power system... This name is quite good, and it is very general."
Chang Haonan then realized that at this moment, domestic research on integrated power systems should still be in a relatively early stage.
So much so that there is a high probability that there is no definite noun to define it.
My unintentional remark may have advanced the birth of this concept.
Of course, in the end, it's just a name, so it's not that important.
What Chang Haonan is really concerned about is what he or his research group can do in it——
It has only been three years since the Torch Laboratory was established, and the first batch of students are still I haven’t graduated yet, so I only have income but no income, and the overall scale is also growing year by year.
The LNG ship at the Hudong Plant has now passed the initial problem-prone period and entered a relatively stable stage. In most cases, several graduate students take turns to keep an eye on the situation and report it in a timely manner. That’s it.
It is equivalent to liberating Liu Fangping and Lei Zhixing.
Originally, Chang Haonan’s next arrangement was for the two of them to gradually transition to non-contact magnetic bearings and research on permanent magnet fault-tolerant power generation systems——
Both of them were born in the machinery industry, and they It's only fitting that we be responsible for sending traditional rotor bearings (and fellow students in the same major) to their graves.
The only problem is that Torch Laboratory’s technical accumulation in this area is... relatively limited.
Chang Haonan has indeed tried to apply a permanent magnet fault-tolerant power generation system on the SeA650 engine, but on the one hand it is just to verify its feasibility, and in fact it has completely retained a full set of mechanical rotor bearings. On the other hand, in addition to the design In addition to being completed by himself and 606, most of the core components were selected from foreign suppliers.
Even so, as its core power generation equipment, the relatively simple, mature and reliable switched reluctance motor was still chosen.
The realization of high power density performance in a wide speed range of this kind of motor requires the establishment of a large gap to adapt to material thermal expansion and mechanical spacing specification requirements. Therefore, the output performance is poor and the volume is difficult to further compress.
A more ideal choice is a permanent magnet motor.
However, let alone Torch Laboratory, even if you look around the world, there are no particularly mature technologies and products.
Germany, the United States, Britain, Russia and Sweden each have related models, but they are all experimental equipment, and the reliability and volumetric power density are generally not ideal.
In addition, as SeA650 is a civil aviation engine for international cooperation, the scope of supplier selection can naturally be broadened.
However, most of the projects of the Aerospace Power Group still involve, even specifically for military use. The large amount of bearing support parts requires a stable supply, and it is impossible to rely on imports for everything.
So, no matter from which perspective, you have to find a way to get the permanent magnet motor yourself.
The opportunity to participate in the research and development of integrated power systems is like sending a pillow when you are drowsy——
Although there are still hundreds of millions of differences between warship power and aircraft power, the specifics are In terms of integrated power systems, one of the key technologies is the permanent magnet propulsion motor.
Of course it is impossible to move products directly to Hangfa, but the technologies are always the same.
Therefore, Chang Haonan simply asked bluntly:
"I don’t know if it is convenient for General Changshan to reveal what step you are currently at?"
"If you are in a hurry... ...Our laboratory can first send a technician with relevant engineering experience to assist..."
Chang Shan looked at Chang Haonan in front of him who was suddenly more proactive than himself, and he couldn't hold back:
< br>“It’s not enough to catch up with the progress...”
He waved his hand:
"This project is currently led by Academician Ma. It is the first project he led after being elected as an academician, so it is very stable."
Hearing This name, Chang Haonan thought to himself, is true.
Academician Ma Weiming’s name, even though he had almost no interaction with the Navy in his previous life, is definitely well known.
At this beginning of the century, Academician Ma’s name has not yet become a household name, but he is actually already a leading figure in the field of ship power supply systems.
He was elected as an academician of the Academy of Engineering in 2001, largely because the ship power supply system he presided over and developed won the first prize of the National Science and Technology Progress Award the previous year.
Of course, in this current timeline, Chang Haonan and Ma Weiming have not had any direct intersection, and they certainly cannot show that they understand each other too well.
Therefore, Chang Shan on the opposite side did not notice any clues and just continued calmly:
“We just completed the feasibility study at the beginning of this year and are still discussing whether to choose medium voltage communication. The solution is still a medium-voltage DC solution, so the next step is to conduct a round of ground experiments in Jiangcheng.”
“After the technical route is determined, you can just send people over... Anyway, these preliminary tasks are not enough. It has little to do with specific technology research and development, or... Instead, we need to exclude external influences and see which solution has greater advantages..."
Regarding the choice between DC and AC, Chang Haonan knew from the perspective of hindsight that the correct answer should be the former.
Moreover, even based on his own needs, he would definitely choose the former -
AC technology can continue to use land-based power system equipment, and engineering development only needs to solve the problem of equipment shipment adaptability improvement , full system integration and other issues, the engineering implementation is difficult, but the requirements for the speed regulation performance of the prime mover are high, the increase in system power density is limited by the power supply frequency, which makes the volume and weight difficult to compress, and the parallel connection conditions of the alternating current generator sets are harsh, so it is only suitable for Objects that do not require high power density and are powered by the same type of power supply.
If the shipbuilding industry says your thing is too big, it must be really big. Americans chose communication technology that seemed to be a shortcut out of their confidence in their own technological research and development capabilities.
Then a bunch of problems arise.
Of course, DC systems also have technical difficulties such as high system integration, strong nonlinearity, and tight coupling of electromagnetic characteristics.
But these parts are concentrated at the power control system level, which happens to be the part that China is good at. The solution is at least not as difficult as the AC system.
For a moment, Chang Haonan had the urge to speak out this set of analysis conclusions directly.
Fortunately, I got it under control in the end.
No need.
On the one hand, even if Chang Haonan is now famous, it is impossible for other naval engineering systems to directly change the project plan just because of his words from an outsider.
On the other hand, China's technology research and development in the field of integrated power systems has basically never encountered particularly catastrophic setbacks, and there is a giant like Ma Weiming at the helm.
In this case, letting them go through the entire research and development process normally is a necessary condition for accumulation.
So when the words came to his lips, he changed it to a question:
"So what Changshan means is that we need Torch Group to complete the fault fusion diagnosis system and install it on the verification ship?"
"That's right."
Changshan nodded:
“Although the integrated power system is good, all technologies have two sides.”
“The centralized management and centralized distribution of energy throughout the ship means that system risks will affect the whole body. If the power system fails, it will not only affect the ship's electrical system, but in the most serious case, it may even cause the entire ship to be paralyzed. ”
“So, in addition to reducing the failure rate as much as possible on the hardware and setting up enough system redundancy to ensure that there is still a backup after a failure, we also hope to estimate the risk of failure of the entire ship before a failure occurs. , solve the problem in the bud.”
It can be seen from this incident that projects led by big bosses are indeed different.
The problems are clearly sorted out, the solutions are clear, and there are multiple backups.
Reduce project risks to a minimum.
It is no wonder that China in the previous life was able to catch up from behind in the field of ship electrical systems.
"Fault fusion diagnosis first requires a sufficient understanding of the electrical design of the entire ship, so I can't guarantee anything before seeing the specific plan."
Chang Haonan did not do everything, but was very cautious. He replied:
"So... after you select a specific plan, I hope to send a technical team, or at least a technical representative, to join your project and track the technical verification of this ship throughout the process. This is equivalent to the exchange conditions proposed by Chang Haonan.
Chang Shan understood instantly and pointed at himself:
"Just like me in the QC300 project team?"
"Absolutely."
Chang Haonan replied:
"I don't insist on occupying a deputy chief engineer's position Location... But the people I sent must join your project decision-making team."
After hearing this, Chang Shan hesitated for a moment:
"Your request is indeed very reasonable, but I am not the project leader, so I cannot agree on behalf of the entire team."
"But I will report the situation to Academician Ma, who personally entrusted me with this matter I came to talk to you, so I shouldn’t refuse..."
To this extent, it is basically equivalent to agreement.
It’s just that there are some administrative procedures to go through later.
“Now, in a literal sense, we have you and me, and I have you.”
Chang Haonan joked half-jokingly.
Chang Shan was startled when he heard this statement, and then he laughed -
Institute 703 has now participated in the QC300 project led by the Aerospace Power Group.
The Torch Group will also send people to join the comprehensive power system research and development work hosted by Shipbuilding Industry.
The linkage between sea and air belongs to yes.
After some joking, Chang Haonan then stood up and stretched out his hand to the other party:
"Then... wish us a happy cooperation in advance?"
"Happy cooperation."
< br>(End of this chapter)