Kawasaki K3V K5V Series Piston Pump | K3V112DT-1XHR-9N64-2V | Excavator Main Pump
| Model Number | K3V112DT-1XHR-9N64-2V, K3V45, K3V63, K3V112, K3V140, K3V180 |
|---|
Product Description
I. Technical Parameters
1. Core Performance Parameters
- Pump Type: Swashplate axial piston variable dual pump
- Load-sensitive + constant pressure composite control
- Right-hand rotation
- Closed-circuit design
- Designed for medium and large excavator main hydraulic systems
- Displacement & Pressure:
- Single pump displacement: 112 mL/r
- Total displacement (dual pump): 224 mL/r
- Variable range: 10%–100% (stepless)
- Rated pressure: 35 MPa
- Max pressure: 40 MPa (≤10 s)
- Rated speed: 2000 r/min
- Max speed: 2400 r/min (≤5 min)
- Minimum stable speed: 200 r/min
- Flow & Efficiency:
- Single pump flow: 224 L/min
- Total flow: 448 L/min
- Load-sensing response time: ≤40 ms
- Volumetric efficiency: ≥95%
- Total efficiency: ≥91%
- Inlet vacuum: ≤0.035 MPa
- Operating Characteristics:
- Max oil temperature: ≤90°C
- Noise level: ≤86 dB (1 m distance)
- Service life: ≥16,000 hours (12 h/day operation)
2. Structure and Connection Parameters
- Structure:
- Dual-pump coaxial integrated design
- Shared drive shaft and pump housing
- Swashplate axial piston design per pump
- Integrated control valve group
- Automatic end-face clearance compensation
- Anti-impact valve system
- Core Materials:
- Plunger: Chromium-molybdenum alloy steel (nitrided, HRC 62–65)
- Cylinder block: Tin bronze ZCuSn10Pb6 (HB 240–280)
- Swashplate: Alloy steel with diamond coating (HV ≥1000)
- Seals: Fluororubber (≤120°C)
- Connection Specifications:
- Suction port (P): G2″
- Discharge ports (A1/A2): G1.5″
- Shaft: Involute spline (30×60)
- Mounting flange: 220 × 180 mm bolt spacing
- Weight: ≈120 kg
- Dimensions: ≈780 × 550 × 420 mm
3. Medium and Environmental Requirements
- Hydraulic Oil:
- Standard: L-HM 46
- Low temperature: L-HM 32 (< –25°C)
- Viscosity: 15–400 mm²/s
- Moisture content: ≤0.02%
- Strictly no particles >5 μm
- Cleanliness:
- ISO 4406: 14/11
- Suction filter: 5 μm
- Return filter: 10 μm
- Replace filter at ΔP > 0.15 MPa
- Environment:
- Temperature: –30°C to 95°C
- Humidity: ≤95%
- Protection: IP67
- Suitable for dusty, high-impact conditions
II. Working Principle
1. Dual-Pump Coordination
The engine drives a shared shaft, rotating both pump cylinder blocks synchronously.
Each pump independently completes suction and discharge cycles, supplying oil to different actuators (boom, arm, bucket, swing, travel), enabling simultaneous multi-function operation.
2. Load-Sensitive Composite Control
- Load-sensing valve detects actuator pressure in real time
- Below 35 MPa:
- Pumps independently adjust swashplate angle
- Flow matches load demand precisely
- At 35 MPa:
- Constant pressure control limits flow
- Above 40 MPa:
- Anti-impact valve releases pressure instantly
3. Pressure and Flow Stability
- Dual-pump flow distribution valve ensures balanced output
- Pressure fluctuation ≤0.5 MPa
- Oil replenishment valve prevents cavitation
- Cooling circuit maintains oil temperature ≤90°C
III. Features and Advantages
1. High Pressure & High Flow Efficiency
- 35 MPa rated pressure
- 448 L/min total flow
- Drives 4–5 actuators simultaneously
- Energy savings ≥35% vs conventional systems
2. Impact Resistance & Long Life
- Diamond-coated swashplate + nitrided plunger
- 80% improved impact resistance
- Automatic clearance compensation
- Service life ≥16,000 hours
3. High Control Precision
- Response time ≤40 ms
- Flow control accuracy ≤1%
- Pressure fluctuation ≤0.5 MPa
- Stable at low speed (200 r/min)
4. Strong Equipment Compatibility
- Compact dual-pump integration (30% space saving)
- Standard excavator interface compatibility
- Wide temperature adaptability
- Suitable for harsh environments
IV. Functions and Applications
1. Core Functions
- Dual independent high-pressure oil supply
- Real-time load-adaptive flow control
- Impact protection via integrated valve system
- Efficient multi-actuator coordination
2. Main Applications
- Medium and large excavators (25–45 tons)
- Special excavators (long-arm, mining, wetland)
- Heavy construction machinery (loaders, cranes)
V. Applicable Machines and Scenarios
1. Compatible Equipment
- 25–45 ton crawler excavators
- 30–40 ton wheeled excavators
- Long-arm excavators (15–25 m)
- Heavy-duty mining excavators
- Large loaders (>30 tons)
- Crawler cranes (<50 tons)
2. Typical Scenarios
- Mining Excavation:
35 MPa high-pressure output for hard rock excavation
60 cycles/hour, continuous 12-hour operation - Infrastructure Construction:
Coordinated boom, arm, and swing operations
Cycle time ≤12 s
Energy saving ≥35% - Tunnel Excavation:
Compact installation
Stable operation at –10°C
Anti-impact design for rock excavation
VI. Alternative Models
1. Same Series Alternatives
- K3V90DT:
- 90 mL/r displacement
- 360 L/min total flow
- Suitable for 20–25 ton excavators
- ~25% lower cost
- K3V140DT:
- 140 mL/r displacement
- 560 L/min total flow
- Suitable for 45–50 ton excavators
- ~35% higher cost
2. Cross-Series Alternatives
- K3V112D (Single Pump):
- 112 mL/r
- Lower cost (–40%)
- Suitable for <20 ton machines
- K3V112DT-M:
- Rated pressure: 30 MPa
- Medium-load applications
- ~20% lower cost
- K3V112DT-L:
- Left-rotation version
- Same performance
- For imported equipment compatibility
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