Key components of construction machinery are the foundation, support and restriction bottleneck of the development of the industry. When the development of construction machinery reaches a certain stage, the research of high technology in the industry will mainly focus on key components such as engine, hydraulic pressure, transmission and control system.The dynamic performance of construction machinery is one of the most important indexes to measure the technical level of products.In addition to improving fuel injection system and reducing fuel consumption and carbon emission, engineering machinery engines have specific requirements on torque reserve and power output mode, performance matching, vibration and noise at low speed.At present, China's construction machinery products supporting the engine weichai, shangchai, cummins, dowitz, perkins, isuzu, yangma and so on.High-end products, export equipment, high-tonnage equipment and excavators almost all rely on foreign brands.
Special transmission parts for construction machinery include "double variable system", planetary rotary reducer, drive axle and suspension system, slewing support, "four-wheel belt" and so on.At present, the research and development level and means of transmission parts of construction machinery in China are about 30 years behind the international advanced level. Few domestic enterprises can undertake the closed test method of working condition load spectrum loading, and the precision and performance of transmission gears are also far behind the international advanced level.
Market development of engineering machinery products
Hydraulic component is one of the key parts of construction machinery products. It can not only reflect the efficiency, simplicity and comfort of the whole machine, but also be the main fault source of the whole machine.Combined with the theme of the conference, I will mainly introduce the development status of the industry of supporting hydraulic parts of excavators.For a long time, in the aspect of high pressure and large flow hydraulic device, the products of domestic parts enterprises are difficult to meet the supporting requirements of the host enterprises, which makes the import become the only choice, especially in the excavator products.However, the price is so expensive that it "eats up 70% of the profits of the construction machinery industry" and is under the control of others for a long time.
Improve the power matching performance of construction machinery products
Plan to set up diesel engine test center for construction machinery and large agricultural machinery products, and cooperate closely with large enterprises in the construction machinery industry to build a research and development platform or innovation alliance.Power transfer and system optimization of engineering machinery is an important way to reduce fuel consumption. Through optimization design and load sensing control, the effective power and power distribution of the engine can be reasonably utilized, so that the engine power output is always in the best state, and the engine can be safely protected under bad working conditions.This technology has become the international competition of the highlights of engineering machinery, is China's construction machinery industry during the "twelfth five-year" energy conservation and emissions reduction, the importance of enhancing the added value of the product technology research and development direction, especially the mainstream product quantity bedding face is wide, the market demand is big, fuel consumption is large, be the focus of industry transformation of the mode of growth as a treat, catch implement.
Focus on the construction machinery hydraulic components of the product development and high precision, large-scale manufacturing.Support, cultivate and develop key hydraulic components r&d and manufacturing base through market orientation.At the same time, the implementation of several demonstration projects, improve the overall manufacturing technology and management level of the hydraulic parts industry.