CDH2 heavy-duty hydraulic cylinder: power solution for high-intensity working conditions

CDH2 heavy-duty hydraulic cylinder is a hydraulic actuator designed specifically for high load and high-frequency impact conditions, widely used in mining machinery, metallurgical equipment, heavy engineering machinery, and port cranes. This series of oil cylinders is reinforced with structural strength based on the CDH1 series, using optimized sealing systems and anti fatigue materials to ensure long life and high reliability in extreme environments.

• The cylinder barrel adopts seamless steel pipe integral forging process, with a yield strength of ≥ 600 MPa, and is inspected by ultrasonic testing to ensure no internal defects.
• The cylinder head and bottom are designed with double thread locking and welding reinforcement, which increases the tensile strength by 30%.

• The material of the piston rod is 42CrMo4 alloy steel (surface quenched hardness HRC58-62), and through rolling strengthening treatment, the fatigue life is extended by 50%.
• The rod end thread is manufactured according to DIN 2633 standard and is compatible with high-strength locking nuts to prevent vibration loosening.

• The main seal adopts a composite material of polytetrafluoroethylene (PTFE) and nitrile rubber, with a pressure resistance of 40 MPa and a reduced friction coefficient of 0.08.
• The dust ring is designed with double lips to resist the invasion of pollutants such as dust and iron filings.

• Equipped with an adjustable hydraulic buffer valve, the impact energy is adjusted through the throttle hole to reduce equipment vibration.
• The guide sleeve adopts copper alloy embedded graphite columns to achieve self-lubricating and anti bite performance.

• mining machinery
  • Hydraulic support lifting system, crusher jaw drive mechanism.
• metallurgical equipment
  • Continuous casting machine sector adjustment and ladle tilting device.
• Heavy engineering machinery
  • Wheel loader bucket lifting cylinder, hydraulic pile driver impact cylinder.
• Port equipment
  • Container crane lifting device locking mechanism, gantry stacker reclaimer pitch system

• Check the wear of the ear pin every 500 working hours and apply high-temperature lubricating grease (suitable for temperatures ranging from -20 ° C to+150 ° C).
• Regularly use a hydraulic oil contamination level detector (NAS 1638 standard) to monitor the cleanliness of the oil, and it is recommended to maintain NAS level 7 or below.

• Increased internal leakage: Replace the piston sealing ring (model: CDH2-SEAL-KIT-XX).
• Crawling phenomenon: Check for residual air in the system or delayed response of the servo valve. It is recommended to install an exhaust valve.
• Abnormal wear of the rod end: Check the alignment error (allowable deviation ≤ 0.1mm/100mm stroke).

• Surface treatment: galvanized nickel alloy (salt spray test ≥ 1000 hours), ceramic spraying (high temperature resistance up to 300 ° C).
• Intelligent integration: optional magnetostrictive displacement sensor (accuracy ± 0.01mm) or pressure transmitter.

• Using high-strength aluminum alloy cylinder body (such as 7075-T6), the weight is reduced by 20% while maintaining the same load-bearing capacity.

• Built in IoT sensors upload real-time pressure, temperature, and travel data, supporting predictive maintenance systems.

• The sealing material complies with REACH environmental standards and is compatible with biodegradable hydraulic oils such as HETG and HEES.

The CDH2 heavy-duty hydraulic cylinder has become an indispensable power component under extreme working conditions through structural strengthening, material upgrading, and innovative sealing technology. With the development of industrial equipment towards intelligence and efficiency, the CDH2 series is gradually integrating digital monitoring functions to help enterprises improve overall equipment efficiency (OEE) and reduce full lifecycle costs.