MK04 Series Rollers
4 week ago
Product details
1. Product Overview
TheMK04 Seriesis ahigh-reduction-ratio, high-torque hydraulic travel motorspecifically designed fortracked machinery(e.g., excavators, bulldozers, drilling rigs). Its core function is to convert hydraulic energy into mechanical energy, driving tracks for forward/backward movement, steering, and other operations. This series is characterized by itscompact structure, high reliability, and strong adaptabilityto heavy-duty and harsh working conditions.
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2. Key Technical Features
(1) Planetary Gear Reduction Mechanism
• Multi-Stage Planetary Gears: Utilizes2-3 stage planetary reductionto achieve high transmission ratios (typically 10:1 to 100:1), converting high-speed motor rotation into low-speed, high-torque output for tracks.
• High Load Capacity: Evenly distributed force on planetary gears enhances shock resistance, suitable for frequent starts/stops and directional changes in tracked equipment.
• Low Noise Design: Optimized gear meshing angles reduce vibration and noise during operation.
(2) Hydraulic Motor Core
• Axial Piston Design: Employs a swashplate piston structure for efficient hydraulic energy conversion, delivering high starting torque and excellent low-speed stability.
• Variable Displacement Option: Some models (e.g., MK04-V series) supportdisplacement adjustmentvia swashplate angle changes, enabling stepless speed control for varying loads.
• High-Pressure Tolerance: Rated pressure up to350-400 bar, with peak pressure exceeding450 bar, suitable for heavy-duty excavation and climbing.
(3) Sealing and Lubrication System
• Multi-Layer Sealing: Combineslip seals + composite seal ringsto prevent hydraulic oil leakage and ingress of mud/water.
• Forced Lubrication: Independent oil channels lubricate planetary gears, reducing wear and extending service life.
• High-Temperature Adaptability: Sealing materials operate in temperatures ranging from-40°C to +120°C, suitable for extreme cold or heat.
(4) Modular Design
• Detachable Structure: Integrates motor, reducer, and brake (optional) but allows component-level maintenance to reduce costs.
• Standardized Interfaces: Input/output shafts and hydraulic ports comply with ISO standards, ensuring compatibility with most tracked equipment.
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3. Key Technical Specifications (Typical Model)
【表格】
Parameter MK04-200 (Example Model)
Displacement 200 cm³/rev (fixed)
Rated Pressure 320 bar
Peak Pressure 420 bar
Max Output Torque 12,000 Nm (after reduction)
Max Speed 150 rpm (before reduction)
Reduction Ratio 50:1 (customizable)
Brake Torque 8,000 Nm (with brake model)
Weight 180 kg
Protection Grade IP67 (dust/waterproof)
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4. Core Advantages
(1) High Torque Density
• Amplifies torque via planetary reduction, delivering3-5x higher torquethan conventional motors, ideal for climbing and traction.
(2) Strong Impact Resistance
• Planetary gears distribute loads evenly, withstanding shock loads (e.g., rock collisions) and reducing failure rates.
(3) Low-Speed Stability
• Piston motors maintain smooth output at low speeds (<5 rpm), eliminating track crawling vibrations.
(4) Environmental Adaptability
• Sealing meetsMIL-STD-810Gstandards for mud, rain, and dust resistance.
• Excellent cold-start performance (-30°C without preheating).
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5. Typical Applications
• Construction Machinery:
• Excavator track drives
• Bulldozer/loader track systems
• Drilling rig/piling machine mobility platforms
• Agricultural Machinery:
• Large combine harvester tracks
• Sugarcane harvester/cotton picker undercarriages
• Specialty Vehicles:
• Fire truck/rescue vehicle tracks
• Military engineering vehicle off-road drives
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6. Selection and Customization
(1) Basic Selection
Calculate required torque based on equipment weight, track size, and slope:
Required Torque=Total Weight×Track Radius×μReduction Ratio×η\text{Required Torque} = \frac{\text{Total Weight} \times \text{Track Radius} \times \mu}{\text{Reduction Ratio} \times \eta}Required Torque=Reduction Ratio×ηTotal Weight×Track Radius×μ
(μ = friction coefficient, η = transmission efficiency)
(2) Custom Options
• Displacement Customization: Adjust piston count or swashplate angle for speed matching.
• Reduction Ratio Customization: Select planetary gear stages and tooth ratios based on track speed requirements.
• Brake Systems: Optionalhydraulic-release/spring-appliedorelectromagnetic brakesfor safety compliance.
• Cooling Methods: Natural cooling or forced water cooling for continuous high-load operation.
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7. Maintenance and Troubleshooting
(1) Routine Inspections
• Hydraulic Oil Purity: Regularly test oil contamination (NAS Class 6 or lower).
• Seal Condition: Check for leaks at output shafts and housing joints.
• Abnormal Noise: Investigate metallic friction sounds immediately for gear wear.
(2) Common Faults
【表格】
Symptom Possible Cause Solution
Insufficient torque Low hydraulic pressure, gear wear Adjust system pressure, replace gears
Slow travel speed Low displacement, high oil temp Increase displacement, improve cooling
Brake failure Broken spring, hydraulic leak Replace brake components, repair seals
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Ningbo Hengnuo Hydraulic Drive Co.,Ltd
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3 year
Main Product:
hydraulic motor,
gear box,
hydraulic pump,
hydraulic valve ,
hydraulic winch,
hydraulic system
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