DANFOSS Gear Pump

Danfoss is a Danish multinational company founded in 1933 by engineer Mads Clausen. Headquartered in Nordborg, Denmark, Danfoss specializes in providing innovative solutions for various industries, including fluid control, heating, and renewable energy.In the realm of hydraulic systems, Danfoss offers a comprehensive range of gear pumps designed to meet the diverse needs of modern applications.

A gear pump is a type of positive displacement pump that uses the meshing of gears to pump fluid by displacement. It consists of two interlocking gears—one driven and one driven—that rotate within a casing, trapping fluid between the gear teeth and the casing. As the gears rotate, fluid is drawn into the pump through the inlet, carried around the gears, and expelled through the outlet, creating a continuous flow.

Danfoss Gear Pump Series

Danfoss offers a comprehensive range of gear pumps designed to meet the diverse needs of modern hydraulic systems. Each series is tailored to specific application requirements, ensuring optimal performance, efficiency, and reliability.

Lumi Gear Pumps

The Lumi series is designed for standard applications requiring reliable and efficient fluid delivery. These pumps feature a pressure-balanced floating-bushing design, enhancing sealing pressure and adapting automatically to operating conditions for improved overall efficiency and minimal energy losses. The high-strength extruded aluminum bodies and cast-iron end covers and mounting flanges provide durability and structural integrity. Available with displacements ranging from 5.1 cm³ to 24.0 cm³, Lumi gear pumps are suitable for a wide variety of applications that demand standard pump performance.

GearMe Gear Pumps

The GearMe series offers high-performance aluminum gear pumps with a wide range of features. These pumps are robust and reliable, making them ideal for a wide range of applications, from small to medium and large off-highway vehicles, as well as for industrial applications. The modular design allows for flexibility in system integration, accommodating various mounting configurations and shaft options.

Rugid Gear Pumps

The Rugid series is engineered for high power density requirements, featuring compact, pre-engineered packages ideal for a variety of industrial and agricultural applications. These pumps are available with displacements from 6.6 cm³ to 55.2 cm³ and come with die-cast aluminum housings, end covers, and flanges to provide rigidity that protects the fixed bushings. The thrust plate design ensures high efficiency over a wide temperature range, while Teflon® coated bushings extend life under extreme conditions.

shhark® Low-Noise Gear Pumps

The shhark® series represents Danfoss’s latest innovation in low-noise gear pump technology. These pumps are designed to reduce noise emissions by up to 10 dB(A), making them up to 50% quieter than traditional gear pumps. The patented asymmetric gear tooth profile ensures low-noise performance, better sound quality, and higher efficiency, even after many hours of heavy-duty operation. The shhark® pumps are ideal for applications where noise reduction is critical, such as in cab-equipped mobile machinery.

Key Features and Advantages of Danfoss Gear Pumps

Danfoss gear pumps are engineered to deliver exceptional performance across a wide range of applications. Their design incorporates advanced technologies that enhance efficiency, durability, and versatility, making them a preferred choice for hydraulic systems worldwide.

Efficiency and Performance

Danfoss gear pumps are designed with a pressure-balanced, floating-bushing construction that ensures optimal sealing pressure and adapts automatically to varying operating conditions. This design minimizes energy losses and enhances overall efficiency. Additionally, the pumps feature highly polished shafts and gears, which reduce internal friction and improve mechanical efficiency, leading to lower power consumption and extended service life.

Durability and Reliability

Constructed with high-strength materials such as cast iron and aluminum, Danfoss gear pumps are built to withstand harsh operating environments. The use of Teflon®-coated bushings and Viton® seals ensures extended life under extreme temperature and pressure conditions. These features contribute to the pumps’ ability to perform continuous operations in heavy-duty applications, providing reliability and reducing maintenance needs.

Versatility and Customization

Danfoss offers a wide range of gear pumps with varying displacements, mounting configurations, and shaft options, allowing for customization to meet specific application requirements. The modular design of the GearMe series, for example, enables easy integration into various hydraulic systems, providing flexibility in system design and installation.

Noise Reduction Technologies

The shhark® series features a patented design that reduces noise emissions by up to 10 dB(A), making it up to 50% quieter than traditional gear pumps. This reduction in noise and vibration enhances operator comfort and helps meet stringent noise, vibration, and harshness (NVH) regulations. The low-noise performance is guaranteed throughout the pump’s life, eliminating the need for external noise reduction devices and offering cost savings.

Applications of Danfoss Gear Pumps

Mobile Machinery

Danfoss gear pumps are extensively used in mobile machinery, including construction equipment, agricultural vehicles, and material handling equipment. Their robust design ensures reliable performance in demanding environments, providing the necessary hydraulic power for functions such as steering, lifting, and propulsion. The low-noise gear pumps, like the shhark® series, are particularly beneficial in cab-equipped machines, reducing operator fatigue and meeting stringent noise regulations.

Industrial Applications

In industrial settings, Danfoss gear pumps power various systems, including conveyor belts, presses, and injection molding machines. Their consistent flow and pressure capabilities enhance system efficiency and productivity. The Rugid series, with its high-flow capacity and durability, is well-suited for heavy-duty industrial applications.

Agricultural Equipment

Agricultural machinery, such as tractors, harvesters, and irrigation systems, rely on Danfoss gear pumps for their hydraulic needs. The pumps’ ability to handle high pressures and variable speeds ensures optimal performance in tasks like tilling, planting, and crop harvesting. The Lumi series offers a cost-effective solution for standard agricultural applications.

Renewable Energy Systems

In renewable energy applications, such as wind turbines and solar tracking systems, Danfoss gear pumps provide the hydraulic power necessary for operation. Their efficiency and reliability contribute to the overall performance and longevity of renewable energy installations.

Maintenance and Troubleshooting of Danfoss Gear Pumps

Routine Maintenance Practices

Fluid and Filter Maintenance

• Fluid Quality: Regularly monitor the hydraulic fluid for contamination, water content, and degradation. Contaminated fluid is a leading cause of pump failure.

• Filter Replacement: Change filters at recommended intervals or when the filter indicator signals the need. Always replace all fluid lost during filter changes.

Visual Inspections

• Leak Checks: Inspect the pump and surrounding components for any signs of leaks.

• Component Integrity: Examine the pump housing, mounting bolts, and connections for any signs of wear or damage.

Operational Monitoring

• Temperature Monitoring: Regularly check the pump’s operating temperature. Overheating can indicate issues such as excessive friction or insufficient lubrication.

• Noise Levels: Listen for unusual noises during operation, which can be indicative of internal wear or cavitation.

Troubleshooting Common Issues

Low or Unstable Pressure

• Potential Causes: Worn gears, damaged seals, or air in the system.

• Solutions: Inspect and replace worn components, bleed the system to remove air, and ensure proper seal integrity.

Overheating

• Potential Causes: Excessive load, inadequate cooling, or internal friction.

• Solutions: Reduce load, improve cooling mechanisms, and lubricate moving parts to minimize friction.

Unusual Noises

• Potential Causes: Cavitation, air in the system, or internal component wear.

• Solutions: Ensure proper fluid levels, bleed the system, and replace worn components as necessary.

Repair and Replacement Guidelines

• Disassembly: Follow the manufacturer’s guidelines for disassembling the pump. Use appropriate tools and take precautions to avoid damaging components.

• Component Inspection: Thoroughly inspect all internal components for signs of wear or damage. Replace any components that do not meet specifications.

• Reassembly: Carefully reassemble the pump, ensuring all components are correctly aligned and torqued to the manufacturer’s specifications.

• Testing: After reassembly, test the pump under controlled conditions to verify proper operation. Monitor for any signs of issues such as leaks or abnormal noises.

Danfoss gear pumps stand out for their robust design, efficiency, and adaptability across various industries. Whether you’re in agriculture, construction, or industrial manufacturing, these pumps offer reliable performance and long-term value.

For purchasing Danfoss gear pumps and related components, consider visiting Poocca.

Poocca Hydraulics (Shenzhen) Co., Ltd., established in 2006, is a comprehensive hydraulic service enterprise integrating R&D, manufacturing, maintenance, and sales of hydraulic pumps, motors, valves, and accessories. With extensive experience, Poocca provides reliable hydraulic solutions to users worldwide .