As the two core technologies in the automotive industry, common rail technology and related precision manufacturing equipment, China has made breakthroughs in its own research and development. China will thus take a new course of autonomous control of common rail technology and industry.
On January 10, 2014, the research and development and application of manufacturing technology and key equipment for the electronically controlled common rail diesel injection system in China, namely, the “High-end CNC Machine Tool and Basic Manufacturing Equipment†major national science and technology major application exchange conference in the national 04 major science and technology project In Wuxi, Academician of the Chinese Academy of Sciences, Xu Xingchu, a long-time expert in precision measurement and precision measuring instrument development and precision machining and ultra-precision machine tool design and manufacturing, Zhou Qinzhi, an academician of the Chinese Academy of Engineering and an expert in machinery manufacturing process and equipment, attended the meeting and made a speech; Fu Yuwu, Chairman of the China Society of Automotive Engineers, Xing Min, Executive Vice President and Secretary-General of China Internal Combustion Engine Industry Association, Wu Bailin, Honorary Chairman of China Machine Tool Association, and Wuxi, an expert and representative of the automotive, internal-combustion engine and machine tool industries, witnessed China's own key technical equipment and its excellent capabilities and performance.
High Pressure Common Rail Diesel Electronic Fuel Injection System
Chinese control the common rail core technology industry chain
As one of the core technologies for energy conservation and emission reduction, diesel common rail technology has long been monopolized by a few multinational suppliers. In recent years, China’s FAW Wuxi Fuel Pumps Institute (hereinafter referred to as Wuxi Pump Institute), Chengdu Weite, Liaoning Xinfeng, and Hunan Nanyue have all developed common rail technologies with Chinese characteristics. However, due to restrictions on manufacturing equipment, There has never been a true industrial production. So far, the common diesel engine common rail technology and products are still mainly dependent on the supply of several large multinational companies, and it is a great risk factor for China's related industries including military vehicles.
To break the monopoly of foreign companies and form an industrial production that is truly independent of the Chinese people, it is necessary to form a key core technology industrial chain that is completely controlled by the Chinese themselves, starting from the core technological equipment. This time, another key technology in this chain—the related high-end CNC machine tools and basic manufacturing equipment for manufacturing common rail products—has made major breakthroughs, thus forming an overall breakthrough in China’s common rail technology. In time, through the verification of reliability for a certain period of time, the electronically controlled common rail system and equipment industry with core competitiveness in China will be formed, which will provide technical support for the national strategy for energy conservation and emission reduction and defense industry construction, and reduce the manufacturing of China's automobile industry and related industries. External dependence of equipment.
The collaborative work of domestic outstanding teams
Major projects of high-end CNC machine tools and basic manufacturing equipment were initiated by the Ministry of Industry and Information Technology in 2011. The project lead unit was Wuxi Pumping Station. The participating units were Xi'an Jiaotong University, Beijing Gongye Precision Machinery, Sichuan Pushingjiang Machine Tool and Machine Science Development. Technology shares, Beijing Electric Power Processing Research Institute, Wuxi Machine Tool Stock, Suzhou Xineng Precision Machinery, Wuxi Hongshen Oil Pump Nozzle, and Wuxi Aohuan Machinery Manufacturing. As of September 25, 2013, all 12 sub-topics of 12 devices have passed national inspections. The accuracy of machine tools and precision of machined workpieces have met the requirements of the task contract, and they have now fully entered into user application and reliability verification. According to the reporters following the experts at the two bases of the Wuxi Pumping Station, all 12 sets of equipment in this project are being verified by the user at the user's site and are operating normally.
Electronically controlled common rail products, CNC ultra-precision machining technology, processing accuracy from micron to sub-micron or even nanometer, belongs to the highest technical level in precision machining, requires a number of precision machining and testing technology, such as precision CNC metal cutting machine tools, Precision CNC special processing technology, fine surface treatment technology, precision measurement and automatic assembly technology, process equipment adaptation and integration technology, and common rail component digital intelligent manufacturing technology. For example, the “injector body cavity deep hole drilling and milling high-precision multi-axis composite machining center†in this major special project is the first time in China that the gun drill is successfully compounded in the horizontal machining center for deep hole machining. Has a great breakthrough.
All parties expect to put into industrial production as soon as possible
The achievements made by the national major science and technology special research and development team, which is jointly organized by domestic machine tool industry manufacturers and universities led by the application unit of common rail products Wuxi Pumps, is a breakthrough technology and practical application of related industries in such a short time. A few successful cases. In response, the Director of the Equipment Industry Department of the Ministry of Industry and Information Technology, Wang Jianyu, stated that this major project has established a good cooperative relationship with leading manufacturers in the domestic machine tool industry through the implementation of the three-year project, and the technical breakthrough obtained during the implementation of this project Strongly supported the development of the automotive industry, machine tool industry and defense projects.
Zhu Jianming, lead manager of the major project and head of the Wuxi Pumping Institute, said that the progress of the common rail system applied by the key domestic projects of the Wuxi Pump Institute is in good progress. These projects are of great significance for the modernization and upgrading of the national defense equipment and the research and development of the equipment. After using it, it will break the barriers of foreign technology blocking of certain equipments. Wuxi Pumps hopes to discuss various aspects of cooperation with domestic enterprises at a deeper level.
In an interview with reporters, the deputy general manager of Liaoning Xinfeng, a deputy general manager of the two major domestic common rail system manufacturers, Zang Guanghui and Zhu Yuanxian, deputy general manager of Chengdu Wit, expressed their eager attention to the achievements of this major project and expressed their eager attention. It will continue to cooperate with all relevant domestic parties to make China's electronic fuel injection system industry up.
At the meeting, representatives from the fuel industry also discussed how the prototype could be applied to the factory more quickly and efficiently. Experts at the meeting suggested that it is necessary to further improve the stability and reliability of the equipment on the basis of the previous research and development. Grab the details and strive to apply special research and development machine tools to mass production of common rails as soon as possible. In addition, some manufacturers' representatives also suggested that in order to break the constraints of foreign monopolies, it is hoped that the Ministry of Industry and Information Technology can give more support to the Ministry of Industry and the Wuxi Pumping Institute can better play its leading role and jointly make greater contributions to China's auto industry.
Installation steps for SANY hydraulic cylinder seals
1. Preparation: Clean the working surface and seals, and check if the seals are damaged or deformed.
2. Apply lubricant: Apply a layer of lubricant to the seal and sealing groove.
3. Install the seal: Place the seal into the sealing groove, ensuring that the seal is fully embedded in the groove.
4. Install O-ring: Install the O-ring above the seal, ensuring that the O-ring is fully inserted into the groove.
5. Install the piston rod: Insert the piston rod into the seal and O-ring, ensuring that the piston rod fits tightly with the seal and O-ring.
6. Install the sealing sleeve: Place the sealing sleeve on the piston rod to ensure that it fits tightly with the piston rod.
7. Tighten the nut: Use the nut to fix the sealing sleeve on the hydraulic cylinder, ensuring that the sealing sleeve is secure.
8. Check the sealing effect: Operate the hydraulic cylinder and check if there is any leakage in the sealing element. If there is any leakage, reinstall the sealing element.
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