Chapter 92 Lao Maozi’s Gas Turbine
Mr. Pan nodded: "Yes, if this problem cannot be solved, there will be big problems. We cannot hand over defective warships to the navy."
"It is indeed difficult to solve, but I have a way." Qin Tao said: "We can organize a research team to analyze various possible reasons for the poor anti-interference effect, list all the reasons, and then proceed one by one. By testing bit by bit, you might be able to find the real source of interference and successfully resolve it."
Mr. Pan's eyes lit up: "Yes, what you said is indeed a good method. Let's test it according to this method!"
His throat continued to squirm, and he swallowed the following words back into his stomach. He originally wanted to invite Qin Tao over, but after all, Qin Tao was not in this system. Once he came in, there might be a risk of leaking the secret, so, I still don’t need him for the time being. If I have this idea and follow this method myself, maybe I can solve the problem?
“Come on, Mr. Qin, thank you for your valuable suggestions.” Mr. Pan raised his glass.
"Mr. Pan, I'm just talking nonsense. The specific operation is done by you and your professional team." Qin Tao said: "But it's a pity that we can't get more gas turbines."
Lao Pan was also filled with emotion when he mentioned this matter.
In the 1980s, during the honeymoon period with the West, China imported the most advanced LM2500 gas turbine from the West. The Type 052 destroyer currently under construction uses this gas turbine as the main power, supplemented by a diesel engine imported from Germany, and uses a combination of diesel and oil. The method has reached the world's advanced level.
(Many information says it is a diesel-fuel combination. In this method, the gas turbine and the diesel engine will work together to provide power to the propeller. This means that outstanding parallel technology is required. I don’t know if it has reached this level. Compared with diesel-ran combination The one with the lowest technical difficulty is diesel-fuel alternating, which is simple. Use the diesel engine to patrol at low speeds, use the gas turbine at high speeds, and stall the diesel engine. Everyone does their own thing, and the output is relatively easy to solve.)
Gas turbines are adapted from aircraft engines. Their biggest feature is their fast start-up. In the past, warships used boilers. Before starting, it took a long time to emit heavy black smoke to burn the boiler, and the steam pressure was enough to start. The gas turbine can output full power within seconds after ignition.
"Yes, a total of five units were imported at that time, four for use on warships and one for research. If we knew the changes in the international situation, we would have imported a few more units. However, our country is poor." Pan Lao sighed with emotion. .
Domestic warships have reached the world's advanced level, but who would have thought that they would soon be knocked back to their original shape.
"Our country's scientific research foundation is too weak. It is not easy to develop gas turbines based on our existing aero engines. Even if there are, they will not be able to power warships of several thousand tons. Therefore, we still have to Find ways to import from abroad. If the west is not bright and the east is bright, there will always be opportunities." Qin Tao said.
Since the 1960s, the West has begun to take the gas turbine route. Of course, China has also taken a fancy to it and took out the treasures at hand to try to improve gas turbines. The initial target was the H-6 engine turbojet-8, which is the largest in the country after all. Later other engines were modified.
Among them, the Type 409 gas turbine developed based on the turboprop-6 aeroengine is currently the only one that has achieved positive results and has been successfully used as the main power device in the Type 722 hovercraft.
However, it was only in 1993 that the prototype was successfully finalized. Moreover, the domestic production of the Turbofan-9 has been abandoned halfway, and it is still a castle in the air to convert it into a gas turbine. What's more, this little motivation is not enough.
The currently imported LM2500 has an output power of 23.3MW, which is more than the output power of two GT-1000 units.
"A few years ago, the naval gas turbine we modified with the Turbojet-8 had completed the durability test and was originally going to be transferred to the production stage. However, later, the international situation changed, and we began to contact foreign countries in order to obtain better equipment. ." Speaking of this, Mr. Pan was very emotional: "At the beginning, we negotiated with Rolls-Royce and planned to introduce their Olympus TM3B gas turbine, which is the power on the Type 42 destroyer. Later, the Americans took the initiative. He said that he could export LM2500 to us. I didn’t expect that the international situation changes so quickly.”
Speaking of this, Mr. Pan was a little sad. Self-research was lagging behind, and importing was the best way to improve. However, once faced with changes, others would be stuck. Therefore, no matter when it comes, it is better to have the best. ah!
"Yes, this is a pity." Qin Tao said: "However, the turbojet-8 has a short overhaul time and high fuel consumption. If it can be introduced at that time, we are not wrong in taking the route of introduction. In the future, we will still have opportunities. "
I have already mentioned it once, but unfortunately, Mr. Pan did not understand it.
After all, this can’t be blamed on Mr. Pan. Mr. Pan knew that Qin Tao showed off his talents when debugging electronic equipment, but he also didn’t know that Qin Tao had been a traitor to Lao Maozi many times. Therefore, even if Qin Tao prompted him, Mr. Pan would not Didn't answer the question.
“You mean, introduce it from Lao Maozi?” Yang Dawei’s mind was racing because he knew about the dredger.
"Yes, the gas turbines at Lao Maozi are pretty good." Qin Tao said: "It is said that the superiors are going to Lao Maozi to inspect fighter aircraft. Anyway, I am going there to inspect the gas turbines there. Their GTD15000 is also very good."
(Lao Maozi’s numbers are still very confusing. Some have M numbers, such as this gas turbine, and there is also a number called M90. There are also ones starting with T and so on. Until Lao Maozi split up, Er Mao was responsible for all turbine products. Regroup the names and adopt the method of "UGT + number (rated power. For example, this GTD15000 was renamed UGT-15000, and the Russian number: ГТД-15000. Of course, the latter number is not certain, after all, the power can improved)
“GTD15000? Young man, you are very familiar with Lao Maozi’s gas turbines.” Mr. Pan glanced at Qin Tao approvingly.
Of course Qin Tao is familiar with it, he used it often in his previous life!
The GTD15000 gas turbine is an axial-flow three-shaft gas turbine with a maximum power of 20MW. It has been developed by Lao Maozi for ten years. It began to be developed in 1971, was successfully developed in 1984, and started mass production in 1988. It is regarded as Lao Maozi’s latest development. Advanced gas turbines.
Among them, two models are divided into DA90 and DO90 according to the difference in power turbine type. The DA90 power turbine is 4-stage and can be made to turn left or right; the DO90 power turbine is 3-stage and uses a reversing mechanism when used on ships. Can be reversed directly.
As for the famous GTD25000, it is based on this engine, adding a first-stage compressor and increasing the turbine front temperature. After these improvements, the power has been increased to 26.7MW, which is at the same level as the LM2500 and can be used to drive large warships.
“I have a little understanding.” Qin Tao said: “Mr. Pan, our aero-engine is still a big problem. If we want to solve the problem of marine gas turbines, we can only outsource it, including technology. We should make plans early.”
(End of this chapter)