NACHI road roller high pressure gear pump
NACHI High-Pressure Gear Pump for Rollers
As a core component in the hydraulic system of road rollers, NACHI high-pressure gear pumps are renowned for their exceptional reliability, high efficiency, and superior pressure-bearing capacity. Specifically engineered to meet the rigorous working conditions of roller operations—such as continuous high-load operation, frequent pressure fluctuations, and harsh construction environments—these pumps play a pivotal role in ensuring the stable performance and operational efficiency of roller equipment.
Core Features
- Patented Pressure Loading System: Adopting a proprietary axial and radial pressure loading technology, the pump achieves high efficiency while generating maximum pressures up to 300 bar (30 MPa), effectively meeting the high-pressure demand of roller hydraulic systems for compaction operations<superscript>1.
- Low Pulsation and Quiet Operation: Equipped with modified involute short-tooth gears, the internal gearing design significantly reduces pulsation and noise during operation, ensuring exceptionally quiet performance which is crucial for improving the working environment of construction sites <superscript>1.
- Compact and Durable Structure: The pump features a compact and lightweight design with fewer components, facilitating easy installation and layout in the limited space of roller hydraulic systems. Its impervious structure and minimum internal leakage not only enhance efficiency but also extend the service life <superscript>1.
- Wear Resistance and Longevity: Elastic bearings are employed to allow slight movement, reducing wear and extending the service life of the pump. The unique plain bearing support mechanism further simplifies maintenance procedures and lowers maintenance costs <superscript>1.
- Excellent Dynamic Response: The precision-engineered components work seamlessly to ensure quick and accurate adjustment to changes in load, pressure, or flow rate. This enables the pump to handle sudden load fluctuations during roller compaction without causing system instability <superscript>5.
Technical Specifications
| Series | Model No. | LA (mm) | LB (mm) | øD (mm) | Max Pressure | Rotation Direction | Mounting Type |
|---|---|---|---|---|---|---|---|
| IPH-2B-*-7173A | IPH-2B-3.5-*-7173A | 107 | 51.0 | 8.9 | 300 bar (30 MPa) | Clockwise (viewed from shaft end) | Flange Mounting |
| IPH-2B-5-*-7173A | 112 | 53.5 | 11 | ||||
| IPH-2B-6.5-*-7173A | 116 | 55.5 | 12 | ||||
| IPH-2B-8-*-7173A | 121 | 58.0 | 13 | ||||
| IPH-3B-*-7173A | IPH-3B-10-*-7173A | 128.5 | 60 | 14 | |||
| IPH-3B-13-*-7173A | 134.5 | 63 | 17 | ||||
| IPH-3B-16-*-7173A | 139.5 | 65.5 | 18 | ||||
| IPH-4B-*-7173A | IPH-4B-20-*-7173A | 164.5 | 71 | 18 |
Additional Specifications: Rated pressure 25 MPa; Rotational speed range 600~2000 rpm; Suitable fluid: General mineral hydraulic oil <superscript>2; Port flange standard: SAE J 518 B (varies by model) <superscript>1.
Application Scope
NACHI high-pressure gear pumps are specifically designed for various types of road rollers, including static rollers, vibratory rollers, and pneumatic tyred rollers. They are widely used in hydraulic systems for compaction operations in road construction, highway maintenance, airport runway construction, and municipal engineering projects. The pump’s robust design and excellent performance ensure stable power output for the roller’s compaction mechanism, improving compaction quality and work efficiency.
Maintenance Notes
- Use hydraulic oil that meets the specified grade (general mineral hydraulic oil) and keep the oil clean to prevent contamination from affecting the pump’s performance and service life.
- Regularly check the pump’s operating pressure and temperature. The working pressure should be 1~2 pressure levels lower than the rated pressure for long-term operation to avoid overloading<superscript>4.
- Follow the maintenance schedule to inspect and replace wearing parts such as bearings and seals. The plain bearing support mechanism allows for easy disassembly and maintenance<superscript>1.
- Ensure proper installation and alignment of the pump to avoid excessive vibration and wear during operation.
About NACHI
NACHI is a leading Japanese manufacturer of industrial equipment, renowned for its high-precision and reliable hydraulic products. With decades of experience in hydraulic technology research and development, NACHI’s products are widely used in construction machinery, machine tools, and other industrial fields. The high-pressure gear pump for rollers is a testament to NACHI’s commitment to providing high-performance solutions that meet the demanding needs of the construction industry <superscript>3.
