NACHI shearer high pressure gear pump
NACHI High-Pressure Gear Pump for Coal Mining Machines
1. Brand Overview
NACHI, a top-tier industrial equipment manufacturer from Japan, has long been renowned for its high-precision, long-life, and high-stability hydraulic products. With advanced R&D capabilities and sophisticated manufacturing technology, NACHI’s hydraulic components are widely applied in construction machinery, injection molding machines, machine tools, and particularly in harsh working environments such as coal mining, providing reliable power support for key equipment operations.
2. Core Product Features
2.1 High Efficiency and Durability
The NACHI high-pressure gear pump for coal mining machines adopts special alloy gears and precision grinding technology, which significantly reduces wear rate and ensures a service life of over 10,000 hours. Its volumetric efficiency reaches up to 95%, minimizing energy loss during operation. The pump incorporates a patented axial and radial pressure loading system, enabling it to generate high pressure of up to 30MPa with high efficiency, perfectly meeting the high-power demand of coal mining machines.
2.2 Low Noise Design
Optimized tooth profile and relief groove structure are adopted, and the internal meshing is realized through modified involute short-tooth gears. This design greatly reduces pulsation and noise during operation, with the running noise lower than 70dB(A). It effectively improves the working environment of underground coal mines and reduces noise pollution to the surrounding environment.
2.3 Strong Contamination Resistance
The pump is designed to adapt to the harsh working conditions of coal mines, allowing the oil contamination level to reach NAS 10 grade. It can stably operate even in environments with coal dust and impurities, avoiding frequent failures caused by oil pollution and ensuring continuous operation of coal mining machines.
2.4 Wide Adaptability
The working pressure range of the pump is 10~25MPa (the maximum operating pressure of high-pressure models can reach 30MPa), and it is compatible with ISO VG 15~680 hydraulic oils/lubricants, adapting to different temperature and working condition requirements of coal mining sites. The rotation speed ranges from 500 to 2000 min⁻¹ (r.p.m), and it supports both clockwise and counterclockwise rotation (viewed from the shaft end), with flexible installation methods including foot mounting and flange mounting to match different types of coal mining machines.
2.5 Simple Structure and Easy Maintenance
The pump features a compact and simple structure, which simplifies maintenance and inspection work. For underground coal mining operations where maintenance conditions are limited, this design reduces downtime and maintenance costs, improving the overall operational efficiency of coal mining equipment.
3. Key Technical Parameters
| Parameter Item | Specification |
|---|---|
| Maximum Operating Pressure | 30MPa (306kgf/cm²) |
| Rated Pressure | 25MPa |
| Rotation Speed Range | 500~2000 min⁻¹ (r.p.m) |
| Displacement Range | 3.5~125 cm³/rev (covering IPH series models) |
| Applicable Fluid | General mineral hydraulic oil |
| Installation Method | Foot mounting, Flange mounting |
| Running Noise | ≤70dB(A) |
| Service Life | ≥10,000 hours |
4. Application Scenarios & Value
As a core power source for coal mining machines, the NACHI high-pressure gear pump is mainly used to provide stable high-pressure hydraulic energy for key actions such as shearer drum lifting, traction walking, and body stable support. It is deeply embedded in the hydraulic system of coal mining machines, just like a “precision heart”, ensuring the smooth and efficient operation of the entire machine.
In the harsh underground coal mining environment with high pressure, high vibration, and large amounts of coal dust, the pump’s excellent durability, strong contamination resistance, and stable high-pressure output effectively reduce the failure rate of the hydraulic system. This not only extends the service life of the shearer itself but also ensures the safety and continuity of underground mining operations, improving mining efficiency and reducing operational risks.
5. Main Product Models (IPH Series)
5.1 Single Pump Models
IPH-2A-3.5-11, IPH-2A-5-11, IPH-2A-6.5-11, IPH-2A-8-11, IPH-2B-3.5-11, IPH-2B-5-11, IPH-2B-6.5-11, IPH-2B-8-11, IPH-3A-10-20, IPH-3A-13-20, IPH-3A-16-20, IPH-3B-10-20, IPH-3B-13-20, IPH-3B-16-20, IPH-4A-20-20, IPH-4A-25-20, IPH-4A-32-20, IPH-4B-20-20, IPH-4B-25-20, IPH-4B-32-20, IPH-5A-40-21, IPH-5A-50-21, IPH-5A-64-21, IPH-5B-40-11, IPH-5B-50-11, IPH-5B-64-11, IPH-6A-80-21, IPH-6A-100-21, IPH-6A-125-21, IPH-6B-80-11, IPH-6B-100-11, IPH-6B-125-11.
5.2 Combined Pump Models
IPH-22B, IPH-23B, IPH-24B, IPH-25B, IPH-26B, IPH-33B, IPH-34B, IPH-35B, IPH-36B, IPH-44B, IPH-45B, IPH-46B, IPH-55B, IPH-56B, IPH-66B (and various combined displacement models based on single pumps).
