Oil rotary union

multi-passagehigh-pressurefor wind turbine

Overview
With over 2,000 blade pitch control rotary unions in service, DSTI’s field-proven designs provide robust operation in both onshore and offshore environments. Wind turbine manufacturers require components that can operate continuously in harsh, remote locations where maintenance is complex and costly. DSTI fluid rotary unions for hydraulic blade pitch control systems deliver hydraulic power to blade actuators with minimized downtime and maintenance needs, helping to reduce lifecycle operation and maintenance costs.

Applications

• Blade pitch control systems
• Hydraulic actuation systems
• Hydraulic gearbox systems
• Testing and manufacturing development

Key Technical Features

• High‑pressure, multi‑passage designs for routing hydraulic circuits
• Long‑life, maintenance‑free hydrodynamic seal technology (non‑contacting sealing action for excellent wear resistance)
• Low rotational torque, suitable for continuous‑duty applications
• Options for electrical slip ring and fiber‑optic rotary joint integration
• Direct integration into customer equipment
• Wide temperature range capability (high and low temperature)
• Low heat generation during operation
• Material options including specialized stainless steels for offshore/corrosive environments

Technical specifications

• Product type: Fluid rotary unions / fluid rotary swivels for wind turbines
• Function: Designed for blade pitch hydraulic power delivery to blade actuators
• Field deployment: Over 2,000 units in service
• Environments: Suitable for onshore and offshore turbine applications
• Sealing: Hydrodynamic, non‑contacting sealing action for extended service life
• Integration: Supports electrical slip ring and fiber‑optic rotary joint integration
• Materials: Options include specialized stainless steels for corrosive/offshore conditions
• Performance: High pressure, multi‑passage capability; low rotational torque for continuous operation