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Wind Energy | Hydraulic Actuation | UK Supply
Wind Power Hydraulic Cylinder — 100 mm Bore, 80 mm Stroke
Designed for the precise pitch-control and yaw-drive demands of modern wind turbines, this heavy-duty hydraulic cylinder carries model code HCYY11112028. With a 100 mm bore, 50 mm piston-rod diameter, and a compact 80 mm stroke, the unit delivers controlled force at 16 MPa working pressure while tolerating surge loads up to 25 MPa — making it a dependable choice for onshore and offshore wind installations across the United Kingdom and continental Europe.
Whether you are sourcing replacement actuators for a repowering project in Scotland, specifying new-build pitch cylinders for a wind farm in Wales, or evaluating suppliers for a UK-based OEM drivetrain programme, this page covers everything you need — materials, performance data, application scenarios, and how to request a fast, obligation-free quotation.
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Technical Specification
Model HCYY11112028 — verified factory data
| Parameter | Value |
|---|---|
| Cylinder Mode | HCYY11112028 |
| Working Pressure | 16 MPa |
| Maximum Withstand Pressure | 25 MPa |
| Diameter of Cylinder Tube | 100 mm |
| Piston Rod Diameter | 50 mm |
| Pin Diameter | 150 mm |
| Trip (Stroke) | 80 mm |
| Cylinder Length | 855 mm |
| Weight | 140 kg |
How the Wind Power Hydraulic Cylinder Works
Inside a wind turbine nacelle, blade pitch angles must adjust continuously — sometimes several times per second — to optimise energy capture and protect the rotor during storms. The HCYY11112028 hydraulic cylinder sits in that critical actuation path. Pressurised hydraulic fluid enters through the port at one end, acting on the piston face across the full 100 mm bore area. The resulting force — calculated at roughly 125 kN at 16 MPa — drives the piston rod outward through the 80 mm stroke, pushing the blade pitch linkage through its required arc. Return movement draws fluid back through the rod-side port, providing controlled, bidirectional actuation with millisecond response to valve commands.
The 150 mm clevis pin mounting at each end allows the cylinder to pivot freely as blade geometry changes, eliminating side-loading on the piston rod and extending seal life significantly. A hardened and chrome-plated piston rod surface — standard on this series — resists micro-pitting from condensation that is common inside hub cavities in coastal UK installations. The cylinder body is manufactured from seamless cold-drawn steel tube, honed internally to H8 tolerance, ensuring tight sealing contact with the piston ring pack throughout the rated service life.
Cushioning lands at the end of stroke absorb the kinetic energy of the piston at limit positions, eliminating impact shock that would otherwise fatigue end-cap welds under the millions of actuation cycles typical of a 20-year turbine lifespan. This design detail is often overlooked in budget-grade cylinders but proves critical in wind applications where maintenance access is costly and infrequent.
Materials & Construction
Cylinder Tube
Seamless cold-drawn steel, honed to H8, with phosphate corrosion treatment on external surfaces for offshore humidity resistance.
Piston Rod
45# carbon steel, induction-hardened to 50–58 HRC, hard-chrome plated to 0.025–0.04 mm depth, ground and polished to Ra 0.4.
Sealing System
PTFE-loaded polyurethane piston seals; HNBR rod wiper rings — rated to -40 °C, suitable for North Sea winter temperature ranges.
End Caps & Pins
Forged ductile iron end caps, thermally stress-relieved; 150 mm alloy steel pins with DU bushings for maintenance-free pivoting.
Surface Finish
Exterior two-coat epoxy primer + polyurethane topcoat, salt-spray tested to 480 h per ISO 9227 — meeting UK offshore corrosion standards.
Test & QC
Each unit pressure-tested to 1.5× rated pressure before dispatch; dimensional CMM report and material mill certificates supplied as standard.
Application Scenarios
The HCYY11112028 wind power hydraulic cylinder is specified across a broad range of renewable energy and industrial applications. In onshore wind farms scattered across northern England, Scotland, and Wales, it provides the blade pitch actuation that keeps rotors running efficiently through variable wind speeds — from the gentle 4 m/s cut-in threshold right up to emergency feathering at 25 m/s cut-out. Offshore, the same cylinder handles the additional challenge of salt-laden air and the vibration signature of wave loading transmitted through the foundation structure, which is why the sealing compound and surface treatment specifications are identical to those used in North Sea service equipment.
Beyond pitch actuation, the cylinder’s 25 MPa burst tolerance makes it suitable for yaw-braking systems on turbines up to the 3 MW class, where hydraulic disc brakes arrest nacelle rotation during maintenance. It is also found in tidal energy generators in Scottish sea lochs, where the demanding pressure cycling profile matches the hydraulic cylinder’s fatigue-rated weld design. Industrial equipment manufacturers integrating wind hydraulics into energy storage or hybrid drive systems appreciate the consistent geometric tolerances that simplify drop-in replacement across a mixed fleet.
| Application | Role of Cylinder | Key Requirement |
|---|---|---|
| Onshore Wind Pitch Control | Adjusts blade angle 0°–90° in < 5 s | Fast response, low leakage |
| Offshore Wind Pitch & Feather | Emergency feather at storm cut-out speeds | Corrosion resistance, reliability |
| Nacelle Yaw Brake System | Applies caliper pressure on yaw ring | High-pressure burst tolerance |
| Tidal Energy Generators | Blade angle adjust under water loading | Fatigue-rated, seal integrity |
| Hybrid Drive / Energy Storage | Actuates diverter valves in flywheel systems | Dimensional consistency, repeatability |
Why This Cylinder Stands Out
Sourcing hydraulic components for wind turbines carries a level of scrutiny that general industrial purchasing does not. A failed steering or pitch cylinder can mean a turbine offline for weeks — especially offshore — so engineers and procurement teams in the UK renewable sector look hard at traceability, test documentation, and long-term parts availability before approving a supplier. Here is what puts the HCYY11112028 wind power hydraulic cylinder ahead of generic catalogue alternatives.
160% Safety Margin
Working at 16 MPa with a 25 MPa burst rating provides substantial headroom for pressure spikes during emergency stop sequences or hydraulic accumulator discharge events.
Low-Temperature Seals
HNBR compounds rated to -40 °C ensure leak-free cold-start performance on Scottish highland and North Sea installations where winter temperatures stress standard NBR seals.
Full Traceability Pack
Every unit ships with a pressure test certificate, material mill certs, dimensional report, and serial number traceable to the production batch — simplifying UK asset management and audit requirements.
Cushioned Stroke Ends
Hydraulic cushions at both end-of-stroke positions eliminate metal-to-metal shock, protecting end-cap welds from fatigue damage over tens of millions of pitch cycles across a turbine’s service life.
480-Hour Salt Spray Rating
The two-coat epoxy/polyurethane exterior finish exceeds the corrosion protection requirements for coastal UK sites and is tested to ISO 9227 — a meaningful standard, not a marketing claim.
Custom Bore / Port Options
The factory offers non-standard bore sizes, port positions, and rod-end thread configurations — critical for OEM programmes where blade-hub geometry does not match standard catalogue dimensions.
Other Cylinders You May Need
Projects in the UK renewable and heavy-plant sectors often require companion cylinders alongside the wind power series. Two frequently co-specified units are listed below — both available from the same factory with the same documentation standard.
Steering Cylinder
The Articulated Boom Lift Steering Cylinder Phi63 x Phi35 x 320 is designed for aerial work platforms and articulated machinery, providing precise steering response at elevated working heights — commonly paired with wind turbine maintenance platforms.
Locking Cylinder
The Hook-Lift Truck Locking Cylinder secures container bodies and skip loaders during transport — frequently specified by UK waste management and logistics operators handling wind-turbine component containers between port and site.
Customer Success: North Yorkshire Onshore Wind Farm
Case Study — UK Renewable Operations Ltd, Yorkshire, 2025
UK Renewable Operations Ltd manages a 34-turbine onshore wind farm on the North Yorkshire Moors. After twelve years of service, pitch cylinder seals across roughly half the fleet had begun weeping hydraulic fluid during cold winter starts — a condition that triggered turbine shut-down faults and eroded annual energy yield. The maintenance team had been using a European supplier whose lead times from the Continent had stretched to 16 weeks after logistics disruptions.
The operations director contacted us in January 2025 requesting a comparative quotation for HCYY11112028-equivalent units. We supplied full dimensional drawings, a material traceability pack, and two prototype cylinders for dimensional verification within three weeks. After the client’s in-house engineering team confirmed fitment and ran a 72-hour pressure-hold test at 20 MPa, they placed an order for 18 units. Installation across six turbines was completed during a two-week scheduled maintenance window in March 2025. As of the Q3 2025 review, all 18 replaced cylinders were operating leak-free, and the site’s hydraulic fault rate had dropped significantly compared to the same period the previous year.
Outcome: Reduced fault-related downtime · Full documentation accepted by site insurer · Ongoing supply agreement for future refurbishment phases
“The dimensional accuracy was spot-on — no shimming required. The pressure test certificates matched our insurance documentation requirements right out of the box. Lead time was less than six weeks, which is genuinely impressive for this specification.”
James T. — Asset Manager, Onshore Wind, Yorkshire, UK
“We run a mixed fleet with three different OEM nacelle designs. These cylinders came with full dimensional data files, which saved our engineering team considerable time adapting mounting brackets. Cold-start performance over our first Scottish winter has been faultless.”
Fiona M. — Head of Mechanical Engineering, Scottish Renewable Energy Co., UK
“As a procurement specialist sourcing for a 22-turbine coastal site in Wales, I needed a supplier who could provide consistent pricing, reliable documentation, and quick responses to technical queries. This team delivered on all three. We’ve now placed three repeat orders.”
Rhys O. — Procurement Manager, Welsh Wind Energy Partners, UK
Factory Capability & Custom Engineering
The hydraulic cylinder manufacturing facility operates CNC deep-bore honing lines, servo-driven seal-press stations, and automated pressure-test rigs — allowing consistent production quality across batch sizes from single prototypes to multi-hundred-unit annual supply programmes. The quality management system is certified to ISO 9001, with wind-energy product documentation pathways compatible with IEC 61400 series requirements that UK site operators and their insurers typically reference.
Custom engineering is a genuine core competency, not an add-on service. The in-house application engineering team can work from a customer’s dimensional drawing, a worn-out original cylinder, or a performance specification — adapting bore diameter, stroke length, port location, mounting style, and seal compound to match the exact requirements of your turbine model or industrial system. Projects with UK CE-marking documentation needs or BS EN standards references are handled routinely. If you are an OEM developing a new nacelle design or a retrofit contractor standardising across a mixed fleet, custom tooling for your specific pin and clevis dimensions can be quoted alongside the cylinder pricing.
Frequently Asked Questions
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edit by gzl
