Quality and Performance of Core Components for Domestic Aerial Work Platforms in China

Domestic aerial work platforms are generally characterized by mature and reliable structural parts, weaknesses in hydraulic and electronic control systems, independent research and production for chassis and power systems, and reliance on imports for seals and precision parts.

High localization has been achieved for mid‑to‑low‑end models, while high‑end and large‑height models still rely on imported core components.

1. Structural Parts (Boom, Frame, Outriggers): Internationally First‑Class Level

Materials and performance:

Mainly adopts domestic high‑strength steels such as Q960E, LG700QT, and Q1000 from Baowu, Lianyuan Iron and Steel, etc., with yield strength of 700–1000 MPa, and boom weight reduced by 12%–15%.

The penetration rate of domestic high‑strength steel exceeds 68%.

Technology and reliability:

Laser cutting with precision of ±0.1 mm, full penetration welding, shot blasting for rust prevention, and high‑precision boring for hinged joints.

The design service life of booms from mainstream brands can reach 13–15 years, and some provide lifetime warranty.

Representative manufacturers:

XCMG, Zoomlion, Helen 哲，etc., have approached or matched international first‑class brands in boom lightweight design, high strength, and torsional stability.

2. Hydraulic System: Capable for Mid‑to‑Low End, High Dependence on Imports for High‑End Core Parts

High‑pressure piston pumps, electro‑hydraulic proportional valves, servo cylinders:

Localization rate is less than 18%. Mainstream products still use brands such as Bosch Rexroth, Parker, and Danfoss.

Domestic components show obvious gaps in high pressure above 21 MPa, high‑frequency response, and long service life of 8,000 hours.

Current status of domestic hydraulic parts:

Medium and low‑pressure systems, ordinary multi‑way valves, and standard cylinders are mature, suitable for models below 20 meters.

High‑end models (30 meters and above) almost fully use imported parts, with better response speed (0.01–0.03 seconds), impact resistance, and service life stability.

Trends:

Sunward Intelligent and others have achieved domestic innovations in hydraulic motor rotary joints, integrated oil tank filtration, and anti‑pollution main valves, reducing failure rates.

3. Electronic Control and Sensors: Basic Independence, Import Dependence Over 70% for High‑End Precision Parts

Controllers (ECU/PCU):

XCMG, Zoomlion and others have developed independent electronic control systems, supporting CAN bus control, electro‑hydraulic proportional control, stepless speed regulation, remote control (50 meters), one‑key stowage, and other functions.

Precision sensors:

Inclination, pressure, moment, wind speed sensors, high‑frequency servo amplifiers, and MCUs have an import dependence rate of over 70%.

Domestic sensors still lag in accuracy, stability, and adaptability to low/high temperatures.

Safety control:

Domestic safety algorithms for anti‑overturning, anti‑overload, wind speed warning, and interlock control are mature and meet international safety standards.

4. Chassis and Power: Basically Independent, Stable and Reliable

Chassis:

Mainly uses domestic special chassis such as Dongfeng, FAW Jiefang, Foton, JMC, etc.

Load capacity, passability, and reliability meet requirements.

For blue‑license models (below 16 meters), the proportion of domestic chassis exceeds 95%.

Engines:

Mainly Yuchai, Weichai, and domestic Cummins, meeting China VI emission standards, with strong power and controllable fuel consumption.

Models equipped with XCMG’s intelligent fuel‑saving algorithm reduce full‑load fuel consumption by 18% compared with competing products.

New energy:

Zoomlion has launched fully electric lithium‑battery scissor lifts, cooperating with CATL in special lithium batteries, achieving zero emissions, low noise, long endurance, and lifetime maintenance‑free operation.

5. Basic Parts (Seals, Bearings, Friction Pairs): Self‑sufficiency Rate Below 40%, a Reliability Weakness

High‑end seals (fluororubber/PTFE), precision bearings above P5 class, and special friction pair materials have a self‑sufficiency rate of less than 40% and rely on imports.

Gaps in high‑pressure resistance, oil resistance, high temperature resistance, and service life directly lead to oil leakage, jamming, and shortened service life of complete machines.

6. Overall Summary of Quality and Performance

Advantages

• Structural parts: Materials, technology, and reliability reach international first‑class level, with obvious cost advantages.
• Chassis & power: Fully independent, stable performance, adapted to domestic working conditions.
• Mid‑to‑low‑end complete machines: Localization rate exceeds 85% for models below 20 meters, with high cost‑performance and convenient maintenance.
• Safety & intelligence: Mature electronic control safety systems, with rapidly improving intelligence.

Shortcomings

• Core hydraulic parts (pumps, valves, high‑end cylinders), precision sensors / electronic control chips, high‑end seals / bearings still heavily depend on imports, becoming bottlenecks for performance and reliability of high‑end models (30 meters and above).
• Domestic high‑end hydraulic and electronic control components still lag behind international brands by 3–5 years in response speed, accuracy, service life, and stability.

7. Future Trends

• Whole machine manufacturers and industrial chains will jointly focus on four core technologies: hydraulic friction pairs, electro‑hydraulic proportional valves, sensors, and seals.
• Domestic high‑pressure piston pumps and electro‑hydraulic proportional valves are gradually applied in medium and high‑end models, with steady improvement in localization rate.
• Domestic technologies accelerate breakthroughs in segmented fields such as large height, insulation, and new energy.For example, Helenzhe’s insulated booms have broken foreign monopolies.