Breaking through core barriers, domestically produced excavator hydraulic technology achieves leapfrog development.

Driven by both infrastructure recovery and the "dual carbon" target, the hydraulic system, the core power source of excavators, is entering a critical period of domestic substitution and technological innovation. Recently, several domestic enterprises and research institutions have made continuous breakthroughs in core components such as high-pressure hydraulic pumps, intelligent control valves, and wear-resistant cylinders, breaking the long-standing overseas monopoly and propelling my country's construction machinery hydraulic industry towards a new level of high pressure, intelligence, and energy conservation, injecting strong momentum into the industry's high-quality development.

The excavator hydraulic system is the "power heart" of the equipment, responsible for power transmission and motion control. Its performance directly determines the overall machine's operating efficiency, stability, and energy consumption. Data shows that the hydraulic system accounts for 35%-45% of the excavator's total energy consumption. For a long time, over 80% of core components such as high-end hydraulic pumps, main valves, and motors have relied on imports, not only driving up the overall cost of the machine but also restricting the independent and controllable development of my country's construction machinery industry. In recent years, with policy support and market pressure, domestic enterprises have accelerated their research and development efforts, gradually breaking through this "bottleneck" problem.

Technological innovation achievements have been implemented intensively, and the performance of domestically produced hydraulic components has entered the ranks of international advanced levels. Domestically developed excavator-specific hydraulic cylinders utilize high-strength alloy forged piston rods and hardened coating technology, improving wear resistance by 45% and continuous trouble-free operation time by 35% compared to traditional processes. They are adaptable to harsh working conditions such as heavy-duty excavation and extreme high and low temperatures, filling a gap in domestic high-end hydraulic cylinder technology. Load-sensitive valves developed by related companies employ integrated and modular designs, offering excellent operability and micro-control performance. They have obtained independent patent certification and can completely replace imported products. Their large-tonnage excavator cylinders have broken through the bottleneck of supporting ultra-large excavators, with exported products achieving 3000 hours of continuous uninterrupted operation. Domestically developed stick regeneration dynamic control technology has broken the technological monopoly of Europe and the United States. Excavators equipped with this technology have accumulated sales of over 3400 units, generating over 3 billion yuan in output value.

The transformation towards intelligent and green technologies is accelerating, leading new trends in industry development. Core products such as digital hydraulic valves and motors released by domestic companies adopt sub-micron-level dynamic compensation technology, achieving flow control accuracy of 0.1% and reducing energy consumption by 40%. Related companies have established production lines with an annual capacity of 600,000 sets of high-end hydraulic components. Their axial piston pumps, rotary motors, and other products have reached internationally advanced levels, covering excavators ranging from 6 to 50 tons, and can directly replace imports. Domestic companies are promoting the application of electro-hydraulic integration technology, reducing throttling and overflow losses through system architecture optimization, aligning with the green manufacturing requirements under the "dual carbon" goal.

The market size continues to expand, and the process of domestic substitution is accelerating. Data shows that the global market size for core hydraulic components for excavators will exceed 68 billion yuan in 2025, with China accounting for over 42%, making it the world's largest market. Currently, the domestic production rate of hydraulic components for excavators in my country has exceeded 60%, and the import dependence on core components such as high-pressure piston pumps and precision servo valves continues to decline. With the improvement in the performance and price advantage of domestic products, the penetration rate of domestic hydraulic components in the market for medium and large excavators over 20 tons is rapidly increasing, while exports to more than 170 countries and regions overseas are continuously strengthening international competitiveness.

Industry experts say that my country's excavator hydraulic industry is currently at a critical stage of transitioning from "catching up" to "keeping pace" and even "leading the way." In the future, with the deep integration of intelligent and electrification technologies, domestic hydraulic enterprises need to continuously strengthen their efforts in tackling core technologies, improve product reliability and durability, improve the supporting industrial chain, and promote the higher-quality development of my country's construction machinery hydraulic industry, providing solid support for my country to move from a major construction machinery country to a strong one.