Tiexi District of Shenyang , Liaoning Province, with advanced equipment manufacturing and other key industries as its key industries, has actively built a scientific and technological innovation platform to promote manufacturing enterprises to make up for weaknesses and strengthen key industrial chains with science and technology. The added value of equipment manufacturing industry will increase by 18.5% in 2022.

The Central Economic Work Conference proposed to focus on the key industrial chain of manufacturing industry, identify the weak links of key core technologies and parts, focus on high-quality resources to jointly tackle key problems, ensure the independent, controllable, safe and reliable industrial system, and ensure the smooth circulation of the national economy. Mr.Guo Zhongxiao, Secretary of the Tiexi District Party Committee, said, "We will comprehensively strengthen scientific and technological innovation, forge the industrial chain stronger, and make the quality of 'Tiexi Manufacturing' more sufficient."

Accelerate key core technology research

"The assembly is complete, and the commissioning is in progress." During the video call, the on-site commissioning personnel wearing safety helmets turned to one side, and the mobile camera caught him behind: several 15-meter-high spiral vertical mills have been assembled, the white reducer is connected to the lubricating oil station, and a small screen on the body shows various indicators in real time.

"Be in touch if you have any question." Liu Gang, director of the Institute of Complete Design and Research of Mining Equipment of NHI, hung up the video phone. This batch of spiral vertical mills with his and colleagues' painstaking efforts were officially unveiled at the mine site. He said: "We have overcome the problem of screw shaft improvement, and changed the original solid screw shaft into hollow, which has low power consumption, more energy saving and higher grinding efficiency."

Breakthroughs in key technologies have brought economic benefits. "The customer has ordered 13 sets of this order with a sales amount of more than 60 million yuan." Liu Gang said that this kind of equipment has now achieved independent production.

In Tiexi District, many enterprises are accelerating the key core technology research.

At TBEA Shenyang Transformer Group, the test station is spotless, the equipment is neatly arranged, the test voltage is up to 1000 kV, and the R&D personnel are meticulous in debugging parameters. "The development of UHV bushings has always been a" bottleneck "problem in the localization of UHV transmission and transformation equipment." said Peng Na, director of the Science and Technology Management Department of TBEA Shenyang Transformer Group. The enterprise has concentrated its scientific research advantages, starting from design, technology, materials, quality, test and other aspects, to overcome technical difficulties one by one.

At the end of 2020, TBEA Shenyang Transformer Group developed ± 800 kV UHV dry-type DC bushing with independent intellectual property rights, which was successfully connected to the grid. In April 2022, the TBEA UHV bushing R&D and manufacturing base with a total investment of 640 million yuan was commenced in Tiexi District.

Focus on strengthening weak links of parts

The TBM with a diameter of more than 6 meters is assembled in the workshop. The front shield is equipped with a red cutterhead, and the tail shield is connected with a connecting bridge with a length of more than 70 meters. From a distance, it looks like a steel dragon.

"The TBM 'China Core' displayed its skills at the construction site of Shenyang Metro. This one will also be delivered to us," said Zhou Jun, chief designer of tunneling equipment of NHI Group with a smile. On December 26, 2022, at the construction site of the East Extension Line of Shenyang Metro Line 1, the shield machine equipped with domestic main bearings successfully completed the construction task of driving 1000 meters, and its designers and manufacturers are Zhou Jun and his colleagues.

The TBM is known as the "king of construction machinery". If the driving system of the cutter head of the shield machine is compared to the "palm", the main bearing is the "palm". This inconspicuous metal ring was once the key part of the shield machine that was not localized.

In order to fill this gap, NHI and the Metal Research Institute of the Chinese Academy of Sciences jointly worked on key technologies such as the design, material and heat treatment, precision machining and detection of the main bearing of the shield machine, and developed the main bearing of the shield machine with a diameter of 3 meters. The processing accuracy and performance indicators meet the requirements. In April 2022, the shield machine equipped with domestic main bearings was assembled at the construction site of Shenyang Metro, and began to dig. During the construction, all parameters remained normal.

In view of the weak links of parts and components in the manufacturing industry chain, many manufacturing enterprises in Tiexi District have made efforts to supplement their weaknesses and strengthen scientific and technological breakthroughs.

"Lightweight design is needed here, which can not only solve the problems in processing and manufacturing, but also facilitate the installation and maintenance of products at the user's site." In the design institute of Shenyang Blower Group, Ge Liling and colleagues reviewed and adjusted the product design scheme again.

At the beginning of 2022, SYBG released a list of key projects for internal research and development personnel, and Ge Liling whose 50 years old, took the initiative to unveil the list and served as the general director of the design of the first 0.9M ton/year PDH compressor. "The specification is large and the difficulty is high, so we strive for perfection. The first set of products just passed the factory test a few days ago, and the orders received have exceeded 1 billion yuan," said Ge Liling.

"In the process of tackling key problems, the group has independently developed the compressor supporting gear box and bearing." Yi Hongli, the director of the Science and Technology Management Department of SYBG, said that in the past, the gear box and bearing of such equipment had to be imported. Both the price and the delivery time were "involuntary", and several times the problem of delayed delivery was encountered. "Our own production of gear boxes and bearings can not only make up the shortage of parts, but also help the industrial system to be independent and controllable."

Innovation platform accelerates convergence

On the morning of January 3, Jia Xiaoyu sat on the workstation, logged on to the "Science and Technology Innovation China" platform, carefully reviewed the information: "Liaoning Petroleum and Chemical Technology University and Shenyang Jiaqi Hydraulic Technology Co., Ltd. have docked the design of the dredger loader, which has been signed and transformed; the structural design results of the piston compressor host released by Shenyang Technology University are waiting for signing..."

The new dynamic messages made Jia Xiaoyu busy and happy. Her department, the Science and Technology Innovation Department of Shenyang Economic Development Zone Management Committee, is responsible for the scientific and technological innovation work of Tiexi District and Shenyang Economic Development Zone. In June 2021, Shenyang Economic and Technological Development Zone, which is co-located with Tiexi District, was selected as the pilot park of "Science and Technology Innovation China" of the China Association for Science and Technology. Today, 234 institutions have settled in the "Science and Technology Innovation China" gathering more than 2100 innovative resources.

In recent days, Wang Dali, the minister of the Ministry of Science and Technology Innovation, is busy preparing for docking with the innovation port of Shenyang Technology University. "There is a lot of demand for industrial technology in the region, and there are many scientific and technological achievements in colleges and universities. It is win-win and to be able to connect. We have set up a special class for work cooperation to jointly build an innovation platform." Another platform is about to be built, Wang Dali smiles .

Today, 13 national-level innovation platforms and 20 substantive industry-university-research alliances are operating efficiently in Tiexi District.

Tiexi District also introduced platform-based enterprises to promote the efficient connection between the scientific and technological innovation chain and the industrial chain. Shenyang Zhongguancun Information Valley Technology Service Co., Ltd. has settled in Tiexi for nearly three years, and has linked 62 innovative service institutions and more than 200 technical services.

Two cargo boxes, one by one, enter the production line, pass the grating sensor, enter the pusher, and then rise, stack, and stack together... On January 3, on the 7th floor of Shenyang Zhongguancun Intelligent Manufacturing Innovation Center, staring at the computer screen, Zhao Jiarui and the designers discussed the details of product design again.

Zhao Jiarui is the general manager of Shenyang Yingrui Technology Co., Ltd. The screen shows the side wing shipping line that they designed for the automobile manufacturing supplier. "A new order was received last month, and a set of products sold for more than 1M yuan." Zhao Jiarui said,he and his partner founded this company ten years ago, but the development of the enterprise has been relatively slow, until it settled in Shenyang Zhongguancun Intelligent Manufacturing Innovation Center two years ago.

"From policy interpretation, to publicity and promotion, to resource sharing and customer docking, Shenyang Zhongguancun Intelligent Manufacturing Innovation Center has helped us a lot." Zhao Jiarui said that the company's sales revenue has doubled compared with that before entering the innovation center.

The convergence of innovation platforms has accelerated, and the innovation capacity has been continuously enhanced. In 2022, the proportion of research and development funds in Tiexi District to the regional GDP will rise to 3.3%, the turnover of technology contracts will reach 14.6 billion yuan, and the local conversion rate of scientific and technological achievements will reach 30%.