Five technicians including Lin Qiangsheng and Yang Wanli came to the branch of SAIC Accessories Factory early in the morning - Shanghai Changzheng Machinery Factory. In fact, this is an aviation motor factory, and later changed to the current name.≧

In the 1970s, this factory used to develop turbofan engines as a supporting Y1O, but now the project has been discontinued, and this factory in Guangzhong Road, Hongkou has long been desolate.

At the factory entrance, Director Zhang Longgen met with Lin Johnson and others. He shook hands with everyone one by one and said, "Welcome to Dongxing Group, welcome to Shanghai Airlines Motive Manufacturing Factory!"

Zhang Longgen said enthusiastically to face Lin Johnson and Yang Wanli: "Mr. Lin, Mr. Yang, please come in, I will take you to visit the factory!" The other cadres who greeted Director Zhang also applauded enthusiastically. These people were foreign businessmen, but everyone was a little confused, and they all looked like Chinese.

"Director Zhang, I have heard that your airline is the most advanced unit in Shanghai. I have to take a closer look this time!" Lin Qiangsheng said with a smile, and walked into the factory under the warm reception of Zhang Longgen and others.

Changzheng Airlines has produced three batches of 12 turbofans and 8-motors, codenamed 915, and is a power device of the Y-1o, which is an imitation type of American JT3D motor. Its thrust is 8o.o7 kilograms, and its take-off fuel consumption rate is 54.56 kilograms/kilograms hour. Indicators such as performance and life are still relatively advanced aviation motors in the late 60s.

Lin Johnson and Yang Wanli and others followed Director Zhang Longgen to enter the huge machining workshop. The shipping factory has an area of ​​10,000 square meters and more than 10 acres of land. It is divided into five workshops, including machining, stamping and welding, mechanization, heat treatment and surface treatment, assembly and trial operation.

The most important thing is the total motivation assembly workshop, with a construction area of ​​6,258 square meters, and is equipped with a full-room ventilation and ventilation device twice per hour. It has the characteristics of heating, sealing, dustproof and lighting. According to the design requirements, it can achieve 8 turbofans and 50 sets of annual total assembly turbofans.

The motive floor indoor test bench in the factory is a 15-ton motor suspension bench with a quick pick-up box, a lifting platform, a motive lifting rack and a locking pin, etc. The equipment is all hydraulically driven and controlled by a button operation. The bench can perform long-term test and shaping test bench for motors, and is a domestic seat suspension turbofan jet engine indoor test bench.

The large-scale machining workshop where Lin Johnson is located has a factory area of ​​8o43 square meters. There are 3 to 5 tons of cranes on three vertical spans. A total of 167 domestic and imported cutting machine tools are arranged, basically forming the ability to produce motor rotors, static and small and medium-sized zeros, components, and annual production of 12 sets.

Now Lin Johnson saw that there were many workers working in the workshop, and there were some foreigners. He was a little confused that the Wrought Fan 8 was dismounted. What were these people busy with? There were even foreigners in the factory!

Director Zhang Longgen introduced to everyone: "The total capacity of our factory's engineering power distribution reaches 10, 37o kilowatts, 4 compressors with a capacity of 20 cubic meters per minute, 3 boilers with a steam of 4 tons per hour, and 1057 sets of various mechanical equipment (sets). Among them, 287 sets of metal cutting, 29 sets of stamping, 43 sets of welding, and 61 test machines, etc.."

"Not only in the country, but in Shanghai, our machining capabilities are of the highest level!" Zhang Longgen said this in a slightly proud tone.

Lin Johnson looked at the large assembly workshop and asked curiously: "Director Zhang, what are your workers doing? Why are there foreigners? Also, this is where you once produced the 915 motivation. How much work can you complete with the turbofan 8 motivation?"

Zhang Longgen smiled and said, "Mr. Lin, this is the case. At the end of 1985, our factory received the task of cooperating with McDonald 82. The foreigners you see are actually technicians sent by McDonald. Our workers are the bosses and they are the deputy. They adopt one-to-one technical guidance. Americans are very responsible!"

"Oh, it turns out it's McDonald's man!" Lin Johnson then remembered that Shangfei and McDonald did cooperate in the mid-80s, but they didn't expect it to have begun.

Yang Wanli also said to Lin Johnson: "I have heard of some news about this. The largest assembly line of McDonald's McDonald's 82 was shipped to Shanghai. At the end of last year, the first McDonald's 82 had settled in the U.S. at the end of last year, the first McDonald's 82 had been settled in the U.S.-made. In the future, the McDonald's 82 was introduced!"

Zhang Longgen nodded and said, "Mr. Yang is right. Shangfei is now the largest assembly factory of McDonald's overseas. We will learn about the advanced manufacturing technology and standards of the United States through McDonald's 82, which is very helpful to my country's aviation industry!"

Everyone present was very excited. After all, it was indeed an amazing achievement for Americans to take all civil aviation aircraft to China for production. Yang Wanli and others thought this was a huge progress.

Lin Johnson echoed everyone and nodded and said, "This starting point is indeed very high. I hope there will be a good result."

Zhang Longgen nodded with a smile and continued to introduce to everyone: "During the turbofan 8 production period, our factory mainly undertakes the manufacturing and motive assembly and test drive of high-pressure receivers, combustion chamber outdoor receivers, high-pressure statics, flame cylinders, high- and low-pressure compressor rotors, turbine rotors, diffusion receivers, bearing seats, air deflation mechanisms, components, and the workload accounts for 6 to 7o% of the total machine. In addition, the factory continues to undertake the production tasks of turbojet 6 and turbojet 13 motive parts!"

He introduced to Lin Johnson and others with a little excitement: "The turbofan 8 project was launched at the end of 1972. In order to solve the talent problem, the Municipal Aviation Office invited the Third Ministry of Machinery to transfer 74 professional and technical personnel from aviation motive factories such as Bincheng, Shenyang, Chengdu, Xi'an, etc.."

"The turbofan 8 motor consists of multiple components. At that time, the entire project adhered to the principle of "domestic production as the main and import as the auxiliary" and carried out national cooperation. There were more than 50 participating units in Shanghai alone. For example, the aviation machinery factory is a professional factory for producing motivation blades, which is responsible for the manufacturing of 27 types of blades. The designated factories for the production of overall motivation components include Shanghai Pioneer Motor Factory, Shanghai Hai Electrical Machinery Factory, Shanghai Hai Oil Nozzle Oil Pump Factory, Shanghai Hai Automobile Gear Factory, etc.; there are 9 units such as 35 factories, Shanghai Hai Steam Turbine Factory, May Day Motor Factory, People's Motor Factory, and 16 units such as forging castings.

In the development of motivation, our shipping factory, Shanghai Jiaotong University, Shangfei Institute and other units jointly opened 12 new materials and conquered dozens of new processes such as titanium alloy welding, plasma spraying, and vacuum brazing.

In June 1975, we completed the assembly in just 10 days and 10 nights, and successfully started the ignition in another month. By the end of 198o, the number of developers of the motive host had reached 32, including 2062 workers and 609 technicians. A civil aviation motive design and manufacturing team was initially formed!”

Lin Johnson was shocked. Unexpectedly, an aviation motive factory was established in just ten years from scratch. He also learned that the entire flight was launched in the past ten years, and an aircraft maintenance factory was launched into an aviation company that could manufacture large aircraft like the Y-1o!

After nearly one year of continuous expansion, the shipping plant has added five main factories, including electrolytic processing, turbine blade processing, precision casting, forging and surface treatment, and there are also 9 supporting facilities such as power stations.

Although it is not comparable to the foreign European and American aircraft manufacturing powerhouses, this scale is already the top in China.

Precision casting and forging are workshops for producing blade blanks. The main equipment includes 25 kg vacuum smelting furnace, 2 oo kg smelting furnace, 5 kg silicon rectifier non-vacuum smelting furnace and 1 oo tons of meter high hammer, etc.

The electrolytic processing and turbine blade processing factory form a turbine guide blade machining workshop. The main equipment includes electrolytic machine tools, 16oo mm diameter vertical trucks and 5oo5oo mm diameter lathes and other large equipment.

The projects that have been put into production of the physical and chemical laboratory include line flaw detection, sound flaw detection, high-temperature long-term test, high-temperature tensile test, low-temperature test, metal chemical analysis, non-metallic chemical analysis, metallographic analysis, gas analysis, spectral analysis and salt spray test, etc.

Due to the lack of strict compliance with infrastructure procedures and restrictions on planned investment in the early stages of the expansion, the capacity of each power station is insufficient and some civil and equipment projects are missing. The factory has taken measures such as supplementary design and other sources of funds to make up for it. It has expanded the air compressor station, built gas meter houses, sewage treatment houses and electrolyte tank sheds, purchased and installed large-scale equipment such as 2oo kilograms of smelting furnaces and homemade 1oo tons of meter high-energy high hammers, and enriched physical and chemical testing equipment.

After looking around, Yang Wanli and others sighed, Lao Yang said with great regret: "If the 9-turbofan 8 can be persisted, and the Yun-1o can be persisted, it will not stop in 1982, and it is estimated that there will be better improvements now. The industrial foundation of Shanghai is one of the best in the country. The most important thing about the Yun-1o is to cultivate a team of professional technical personnel. Unfortunately, both projects have been discontinued now, and even if there is a McDonald 82, it will be difficult to sustain the follow-up exhibition!"

Zhang Longgen said helplessly and deeply: "We also understand the difficulties of the country. After all, our foundation is still too weak, and there are some technical obstacles that are difficult to solve!"

"What's the problem with the turbofan 8?" Lin Johnson asked.

Zhang Longgen looked at the cadres behind him. As the leader of the aviation project at that time, he knew the best. He said to Lin Johnson in a slightly embarrassing manner: "There is oil leakage problem from the beginning to the end. Our finishing ability has never met the requirements, and the design of this motivation is indeed behind!"

Yang Wanli straightened his waist and explained to Lin Johnson: "The turbofan 8 is a technology in the late 60s, and it is inevitable that the design is backward. The oil leakage is more serious. The fuel injector of the turbofan is an extremely complex thing, and it is composed of dozens of injection holes evenly distributed in the annular combustion chamber. Due to the high pressure of the combustion chamber, the igniter does not need to work continuously once it is ignited. The combustion chamber always has a high temperature of thousands of degrees, and the air and oil are mixed in to burn directly. Therefore, in order to spray the atomized fuel in evenly, the injection pressure is also huge, which is very high for the oil supply system. If the seal is not done well, this thing will leak oil!"

Zhang Longgen nodded repeatedly and said, "Yes, General Manager Yang is right. If the car cylinder is not sealed well, it will leak oil, but if the vortex seal is not well, it will leak fuel. In addition, the 6 passenger aircraft used internationally now continue to use dual-motors to reduce fuel costs. This is the general trend, while the Yun1o uses 4-motor, which is poor economical, which is also an important reason for dismounting." (To be continued.)8
Chapter completed!