danfoss 90 M55 hydraulic piston pump

4 week ago

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3 year

Product details

I. Product Overview

The Danfoss 90 M55 is ahigh-pressure, large-flow axial piston pumpbelonging to Danfoss's premium industrial hydraulic product line. Designed for high-load, high-precision hydraulic systems, it is widely used in construction machinery, industrial manufacturing, marine propulsion, agricultural machinery, and other fields.

II. Key Specifications

【表格】

Parameter Typical Value

Displacement 55 cc/rev (55 cm³ per revolution)

Rated Pressure 350 bar (up to 420 bar for some models)

Peak Pressure 400 bar (transient)

Speed Range 600–2,500 rpm

Weight Approx. 25–30 kg (varies by configuration)

Port Type SAE, DIN, or custom flanges

III. Technical Features

1. High Efficiency

• Adopts anaxial piston swashplate design, optimizing the contact angle between pistons and swashplate to reduce friction losses and achieve volumetric efficiency exceeding 95%.

• Variable control technology (e.g., pressure compensation, flow control) enables on-demand system adjustment, lowering energy consumption.

2. High Reliability

• Critical components (e.g., pistons, cylinder blocks, bearings) are made of high-strength alloy steel, heat-treated, and precision-machined for excellent fatigue resistance.

• Integrated pressure relief valves protect against sudden pressure surges.

3. Low Noise Operation

• Optimized flow path design minimizes fluid turbulence, paired with noise-reducing bearings to keep operating noise below 85 dB(A).

4. Modular Design

• Supports multiple control methods (manual, electric, hydraulic proportional control) for easy system integration.

• Optional built-in coolers or filters for harsh operating conditions.

IV. Applications

1. Construction Machinery

• Hydraulic main pumps for excavators, cranes, and road rollers.

2. Industrial Manufacturing

• Hydraulic drives for injection molding machines and die-casting machines.

3. Marine & Offshore Engineering

• Hydraulic sources for steering gears and deck machinery in corrosive marine environments.

4. Agricultural Machinery

• Hydraulic systems for combine harvesters and tractors.

V. Performance Advantages

• High-Pressure Output: 350 bar rated pressure meets heavy-duty demands (e.g., hydraulic breakers, shears).

• Stable Flow: Low pulsation ensures precision control in systems like CNC machines.

• Long Lifespan: Danfoss’s strict quality control (ISO 9001 certified) guarantees over 10,000 hours of operation.

VI. Maintenance & Troubleshooting

1. Routine Inspections

• Monitor oil temperature (60–80°C recommended) and pressure gauge readings. Replace hydraulic oil regularly (ISO VG46 or VG68 recommended).

• Check for leaks in seals and replace aged O-rings promptly.

2. Common Faults

• Excessive Noise: Caused by air ingestion, bearing wear, or piston seizure. Vent the system and check oil cleanliness.

• Insufficient Flow: Check for clogged suction filters or malfunctioning variable displacement mechanisms.

• Pressure Fluctuations: Inspect relief valve settings or internal pump leakage.

3. Repair Recommendations

• Utilize Danfoss’s global service network; authorized engineers should perform disassembly.

• Use genuine spare parts (e.g., piston sets, swashplate assemblies) to avoid compatibility issues.

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Ningbo Hengnuo Hydraulic Drive Co.,Ltd

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