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Heliostat Tracking Cylinder


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This heliostat tracking cylinder is the core servo actuator of the heliostat system in solar power tower plants. Receiving closed-loop commands from the master controller, it precisely adjusts the mirror tilt and azimuth via a servo hydraulic system to track the sun's path throughout the day, maximizing reflected solar energy onto the central receiver. Featuring an ultra-long-life low-friction sealing system, comprehensive UV-resistant anti-corrosion design, and an integrated displacement sensing interface, it operates stably for decades in harsh desert, high-altitude, intense UV, and extreme temperature swing environments, ensuring the heliostat field generates power efficiently and reliably.

Brand:
PAZON

Heliostat Tracking Cylinder Hydraulic Cylinder Hydraulic Cylinder Solar Thermal Power Plant

Product Description

Bore diameter: Φ90mm – Φ180mm
Rod diameter: Φ60mm – Φ120mm
Stroke: ≤1000mm (determined by mirror tracking angular range)
Operating pressure: continuous 16MPa, max 21MPa
Max push force: 534 kN (at 21MPa, Φ180mm bore)
Max pull force: 310 kN (at 21MPa, Φ180mm bore with Φ120mm rod)
Breakaway pressure: ≤0.08 MPa (ultra-low friction for sensitive servo response)
Piston velocity: 0.1 – 50 mm/s (infinitely variable from inching to fast sun-tracking)
Tracking accuracy: ±0.05 mm steady-state positioning with servo valve and displacement sensor
Operating frequency: intermittent inching all day; cumulative daily cycles up to several hundred to a thousand
Internal leakage: ≤0.01 ml/min (at 16MPa, over full seal service life)
Temperature range: -30℃ to +85℃ (standard); -45℃ extreme cold version available
Surface protection: laser-clad nickel-based alloy on piston rod + UV-resistant coating on cylinder body
Suitable for: 50MW–200MW solar power tower plants with molten salt storage

Features & Benefits

Servo-Grade Response & High-Precision Tracking
Extremely low friction (breakaway pressure ≤0.08 MPa), combined with a servo proportional valve and an integrated magnetostrictive displacement sensor (±0.01 mm accuracy), enables sub-millimeter closed-loop position control. The mirror angle resolution is exceptionally fine, maintaining tight focus on the receiver target to maximize solar-to-thermal conversion efficiency.
Wind-Blown Sand & UV Resistant Long-Life Seals
The piston rod sealing system features multiple wipers, a metallic sand-scraper ring, and a UV-resistant polyurethane‑HNBR combination seal package. It effectively blocks fine desert sand and dust ingress, with a seal design life rated for over 25 years of continuous outdoor exposure.
All-Round Weatherproof Anti-Corrosion
The piston rod is protected by laser-clad nickel-based corrosion-resistant alloy or ceramic coating. The cylinder exterior is coated with UV-resistant, temperature-cycling-resistant fluorocarbon or polysiloxane paint. All exposed fasteners are stainless steel, meeting the demands of surface temperatures exceeding 50℃ and extreme weather such as sandstorms.
Maintenance-Free & Energy-Saving
Wide, self-lubricating composite guide rings and self-lubricating clevis bushings eliminate the need for any grease throughout their entire service life. The ultra-low-friction design reduces hydraulic power consumption, contributing to lower auxiliary power usage in the heliostat field.
Integrated Intelligent Sensors
Redundant displacement sensors and cylinder pressure transducers can be built in to provide online tracking status monitoring, health diagnostics, and predictive maintenance alerts, seamlessly integrating with the heliostat field control system.