Wantong Hydraulic Tunnel Boring Machine Cylinder Technology Breakthrough Empowers Intelligent Upgrading of Mining Operations

Addressing the core challenges of high impact, severe wear, and large load fluctuations in roadheader cutting operations, Wantong Hydraulic has established a triple-technology system of "impact resistance - wear resistance - adaptability." The company's developed roadheader cylinders use high-strength alloy forged cylinders, with the base material's tensile strength increased to 1200MPa through an overall quenching and tempering heat treatment process. Coupled with a nano-ceramic composite coating technology on the piston rod surface, the wear resistance is improved by 50% compared to traditional chrome plating, perfectly adapting to cutting needs under various geological conditions such as hard rock and soft rock.

In structural design, the R&D team innovatively applied a "dual-stage cushioning compensation mechanism," which uses built-in pressure sensors to monitor load changes in real time and automatically adjust the cushioning oil circuit flow. This effectively solves the "sticking" problem commonly seen in traditional cylinders during sudden load changes in cutting, reducing impact vibration amplitude to below 3.5g (industry average is 5g). The roadheader cylinders adopt a labyrinth dust-proof sealing structure; in coal mine underground environments with dust concentrations exceeding 15mg/m³, the seal life is extended to 800 hours, a 60% improvement over industry standards. In the first half of 2025, Wantong Hydraulic's R&D expenses increased by 15.93% year-on-year, focusing on the development of intelligent control modules for roadheader cylinders. Real-time transmission of cylinder stroke and pressure data has been achieved, providing data support for remote control of roadheaders.

With the "14th Five-Year Plan for Mine Safety Production" clearly requiring that by 2025, over 80% of coal mine intelligent mining faces be implemented, the domestic heavy-duty roadheader market is experiencing explosive growth, directly driving demand for core hydraulic components. Leveraging customized R&D capabilities, Wantong Hydraulic offers a full range of roadheader cylinders with bore diameters from 160mm to 500mm and strokes from 800mm to 3500mm, covering mainstream roadheader models such as EBZ160 to EBZ320. In the first quarter of 2025, related orders on hand reached 187 million yuan, a year-on-year increase of 78.3%.

In overseas market deployment, Wantong Hydraulic's roadheader cylinders rely on a cost-performance advantage of "18%-22% lower price for equivalent performance." By participating in platforms such as the South African Mining Expo and the Australian International Mining Equipment Exhibition, the company has successfully entered high-end mining markets in Africa and Australia. In 2024, roadheader cylinders accounted for 35% of the company's overseas mechanical equipment cylinder revenue, driving overall overseas revenue to grow sevenfold year-on-year. 。​

Notably, the high-pressure impact resistance and intelligent data collection technologies accumulated in roadheader cylinders are gradually being transferred to Wantong Hydraulic's new product lines, including intelligent hydraulic suspension systems and mining robot joint components. With the National Energy Administration launching pilot applications for coal mine robots, the company has developed miniaturized cylinders adapted for roadheader auxiliary robots, forming a product matrix of "heavy equipment cylinders + intelligent hydraulic components," providing a full-chain hydraulic solution for mine intelligent upgrades.

From the kilometer-deep underground mines in Shanxi to open-pit mines in Australia, Wantong Hydraulic's roadheader cylinders are driving a global efficiency revolution in mining with "hardcore performance." This hydraulic core component, integrating multiple independent patents, not only supports the "power backbone" of domestic heavy-duty roadheaders but also marks an important milestone for Chinese manufacturing in the high-end mining equipment field, transitioning from "follower" to "leader."