Danfoss GRR/GRL series hydraulic pump
3 month ago
Product details
Danfoss GRR/GRL Series Hydraulic Pumps
The Danfoss GRR/GRL series hydraulic pumps belong to the Danfoss 90 Series variable displacement pumps, featuring an axial piston design. They are efficient, compact, and durable, making them suitable for hydraulic drive systems in construction machinery, industrial equipment, and other applications.
I. Key Features
1. High Efficiency & Energy Savings
• Utilize an axial piston slipper design with a variable swashplate to adjust piston stroke and displacement, achieving high volumetric efficiency (up to 95% for some models) and significantly reducing energy consumption.
• Integrated charge pumps provide supplementary hydraulic oil, cooling, and control pressure, minimizing energy losses.
2. Compact & Durable Construction
• Parallel-arranged axial piston structure ensures a small footprint and lightweight design, ideal for space-constrained applications.
• Core components are made from duplex stainless steel, super duplex stainless steel, and carbon fiber-reinforced PEEK, offering corrosion resistance, wear resistance, and up to 8,000 hours of maintenance-free operation.
3. Flexible Installation
• Support horizontal or vertical mounting to accommodate diverse equipment layouts.
• Pump outlet flow direction changes with swashplate orientation, enabling reversible motor output shaft rotation and simplifying system design.
4. Intelligent Control
• Offer manual, electric, and hydraulic control options to meet specific system requirements.
• Compatible with Plus+1 controllers and sensors for precise flow and pressure regulation.
II. Technical Specifications (Based on 90 Series Variable Displacement Pumps)
• Displacement Range: 7 models available, covering a wide range of power demands.
• Pressure Rating: Up to 350 bar (refer to product manuals for model-specific ratings).
• Speed Range: Typically 700–2,400 rpm, adaptable to various operating conditions.
• Flow Range: From 1 l/min to 187 l/min (model-dependent), suitable for light- to heavy-duty applications.
III. Applications
1. Construction Machinery
• Hydraulic drive systems for excavators, cranes, concrete pump trucks, etc., delivering powerful performance and precise control.
2. Industrial Equipment
• Hydraulic presses, injection molding machines in metallurgy, papermaking, and automotive manufacturing for efficient energy transfer.
3. Material Handling
• Steering and lifting systems for forklifts and reach stackers, enhancing operational flexibility and responsiveness.
4. Marine & Offshore
• Deck machinery and steering gear systems, meeting corrosion resistance and high reliability requirements in marine environments.
IV. Advantages Over Alternatives
• vs. Traditional Gear Pumps:GRR/GRL series axial piston pumps offer higher efficiency (95% vs. ~80% for gear pumps), reducing energy consumption by over 20%, and longer service life (8,000 hours vs. 2,000–4,000 hours for gear pumps).
• vs. Centrifugal Pumps:In high-pressure, low-flow scenarios (e.g., reverse osmosis desalination), axial piston pumps demonstrate significant efficiency advantages and eliminate the need for pulse dampeners due to low pressure pulsation.
V. Selection Guidelines
1. Define Operational Requirements
• Select models based on system pressure and flow demands (e.g., 90M055 for medium-flow applications).
2. Consider Control Methods
• Opt for electrically controlled models for highly automated systems to simplify operation and improve precision.
3. Account for Installation Constraints
• Prioritize compact designs with vertical mounting support (e.g., certain GRL models) for limited spaces.
4. Evaluate Maintenance Needs
• Choose models with integrated charge pumps and auxiliary mounting flanges to reduce long-term maintenance costs.
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