Through the strategic integration of hydraulic pumps and their electric motors, significant advancements in pump performance and energy efficiency have been achieved. This trend, which emerged since the 1990s and was previously detailed as specific product examples, continues to evolve with each company's unique approaches. The fundamental configuration of electrically driven hydraulic systems involves fixed induction motors that continuously drive either fixed-capacity or variable-capacity pumps at a constant speed. By utilizing relief valves to discharge excess hydraulic flow from the circuit while maintaining supply pressure, substantial progress has been made in energy conservation:

(1) According to the load situation, the optimal speed of the inverter controlled induction motor and variable capacity pump is adjusted to reduce the remaining flow;

(2) Improve variable speed performance and full efficiency by adopting permanent magnet synchronous motor;

(3) The servo motor and pump are used as the hydraulic source to eliminate the power loss in the control valve, and the 1-pump-1 actuator mode that directly drives the hydraulic cylinder and other actuators is introduced as the energy-saving hydraulic source products.

Development trend and challenge of hydraulic press

Hydraulic presses, renowned for their versatility, have played a pivotal role in manufacturing through decades of technological evolution. These machines, which utilize liquid static pressure for material processing, are widely applied in various processes including forging, stamping, cold extrusion, straightening, and bending. Since the first hydraulic press was invented in 1795, the industry has undergone over two centuries of transformation. However, with the rapid advancement of modern manufacturing technologies, competition in the production sector has intensified. To enhance market competitiveness, traditional hydraulic presses now face challenges such as high energy consumption and leakage issues. Improving control precision and efficiency while achieving eco-friendly hydraulic press design and manufacturing has become an urgent priority for industry development.

After decades of development and refinement, the system and overall structure of hydraulic presses have reached a relatively mature stage. Currently, research priorities in hydraulic presses worldwide focus on servo control technology, green energy-saving solutions, integrated systems, hybrid mechanical-hydraulic drive technology, multi-station hydraulic presses, and related auxiliary technologies.

As a leading enterprise in the hydraulic machinery sector of Zhejiang Province, Ningbo Zhongxing Hydraulic has been committed to technological innovation and product iteration in recent years. Its business spans multiple fields including wind power, new energy, and construction machinery. Below are the company's latest product updates and technical achievements:

? Breakthroughs in research and development of new energy vehicle components ?

In early 2025, the company announced significant progress in new energy vehicle components, having successfully developed high-performance aluminum-cased electric motor pumps with internal gear meshing technology. Through collaborations with Zhejiang University and Harbin Institute of Technology, the company optimized gearbox lightweight design, significantly enhancing heat dissipation efficiency and durability. Five utility model patents have been filed for these innovations, with production now in small-scale trial runs and full market launch expected by 2026.

? Upgrade of core components of wind power and construction machinery ?

The company's fourth-generation wind turbine castings, launched in 2023, utilize high-strength alloy materials that enhance fatigue resistance by 30%, and have been deployed in multiple offshore wind projects across China. Meanwhile, the electric forklift hydraulic drive system features a modular design compatible with both lithium-ion batteries and hydrogen fuel cells, meeting customized requirements from leading forklift manufacturers.

? Intelligent production and quality system improvement ?

Leveraging over 50 CNC machining centers and smart inspection systems, the company has established a full-process digital traceability system from raw materials to finished products. Having passed the ISO9001 certification review in 2025 and obtained the IATF16949 automotive industry certification, it has laid a solid foundation for expanding into the global high-end market.

In the future, the company plans to invest 120 million yuan to build a smart factory for hydraulic components to further expand its competitive advantage in the fields of new energy and automation.