JHP Series High-Pressure Gear Pump

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Product details

JHP Series High-Pressure Gear Pump

TheJHP Series High-Pressure Gear Pumpis a high-performance hydraulic pump designed specifically for high-pressure hydraulic systems. It is widely used in construction machinery, agricultural equipment, industrial machinery, and other fields requiring reliable and efficient hydraulic power. Below is a detailed overview of its features, specifications, applications, and maintenance guidelines.

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I. Key Features

1. High Efficiency

• Advanced hydraulic design, such as biomimetic flow channel structures, minimizes turbulence and pressure loss in hydraulic fluid flow, achieving a volumetric efficiency of over95%and a total efficiency of92%or higher.

• Equipped with a high-precision variable control mechanism that adjusts flow output in real-time based on load changes, eliminating power waste. For example, it automatically reduces flow during light-load operation (e.g., traveling) and increases flow during heavy-load tasks (e.g., lifting).

2. Excellent Impact Resistance

• The pump body is made of high-strength ductile iron (e.g., QT500-7 or QT600-3), heat-treated to a hardness ofHB200-250and a compressive strength exceeding500 MPa, enabling it to withstand high-frequency vibrations and impact loads.

• Critical components (e.g., pistons, gears) are crafted from wear-resistant alloy steel (e.g., 20CrMnTi or 20CrNiMo), case-hardened to a surface hardness ofHRC58-62with a tough core, extending service life.

3. Low Noise Operation

• Precision-machined gears maintain a meshing clearance of0.003-0.005 mm, reducing friction and vibration.

• Fitted with imported fluororubber seals that resist oil, high temperatures, and aging, ensuring reliable sealing within a temperature range of-30°C to 120°Cand minimizing leakage and noise.

4. Strong Contamination Resistance

• Hydraulic fluid leakage is controlled at≤0.3 mL/min, significantly lower than the industry average of1.2 mL/min.

• Integrated high-precision filtration systems trap particulate contaminants, allowing operation in media with impurities.

5. Compact and Lightweight Design

• Modular construction ensures a compact structure for easy installation and maintenance. For example, the JHP3 series measures60 cm × 45 cm × 45 cmand weighs just20 kg.

6. Long Service Life

• Core components exhibit minimal wear, with a wear rate of0.002 mmafter1,000 hoursof continuous full-load operation and a performance degradation rate of<3%, far surpassing the industry average of5%.

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II. Technical Specifications

• Model Range: JHP3063, JHP3080, JHP3100, JHP3125, JHP3140, JHP3160, JHP3200, etc.

• Displacement:40–200 mL/r(some models exceed200 mL/r).

• Pressure Ratings:

• Rated working pressure:28–32 MPa.

• Peak pressure:>40 MPa(e.g., JHP3125 model).

• Speed Range:2,200–2,500 rpm.

• Drive Power: Covers86.2 kW to 150.58 kW, depending on the model.

• Applicable Media: Hydraulic oil, lubricating oil, etc.

• Operating Temperature:-30°C to 120°C(some models support higher temperatures).

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III. Applications

1. Construction Machinery

• Powers hydraulic systems in excavators, loaders, bulldozers, road rollers, and cranes, providing a high-pressure power source.

• Example: The JHP3100 model is used in DeGong Machinery loaders, achieving a lifting time of4.2 secondsand a bucket tilting time of3.8 seconds, improving efficiency by12–15%.

2. Agricultural Machinery

• Controls suspension and transmission systems in tractors and combine harvesters, ensuring precise depth and traction force for farming implements.

• Example: Combine harvesters equipped with JHP Series pumps reduce energy consumption by8%and fuel consumption by0.3 liters per acre.

3. Industrial Equipment

• Ideal for machine tools, injection molding machines, and conveyor systems requiring high precision and stability in hydraulic operations.

• Example: A machinery processing plant reported a97% to 99.2%increase in product qualification rates and a5–8 dBreduction in operational noise after switching to JHP Series pumps.

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IV. Configuration Options

1. Multi-Pump Combinations

• Supports dual, triple, or quadruple pump configurations to meet complex hydraulic system demands. For example, the JHP2063/2050/2032 quadruple pump is used in Zoomlion cranes.

2. Integrated Relief Valves

• Optional relief valves protect the system from overload and pressure surges.

3. Customizable Interfaces

• Offers various shaft end types (straight key, rectangular spline, involute spline) and flange styles (square/diamond flanges) to match different host interfaces.

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V. Maintenance & Precautions

1. Hydraulic Fluid Management

• Regularly check hydraulic fluid cleanliness and ensure filter elements are unclogged to maintain fluid purity.

• Select hydraulic oil viscosity based on ambient temperature (e.g., L-HM46 for summer, L-HM32 for winter).

2. Proper Installation

• Confirm pump shaft rotation direction (clockwise = right-hand, counterclockwise = left-hand) to avoid reverse rotation and pump damage.

• Ensure shaft sleeve depth exceeds pump shaft length to prevent shaft misalignment.

• Seal inlet pipes tightly to prevent air ingress, which can cause noise and vibration.

3. Operational Monitoring

• Utilize pressure and temperature monitoring ports on the pump body to track real-time performance and detect potential faults early.

4. After-Sales Support

• Most suppliers offer a12-month warrantyand provide technical training and repair services.

The JHP Series is a mainstream high-pressure external meshing gear pump in China, mainly developed by Jinan Hydraulic Pump manufacturers. It features a maximum working pressure of 31.5MPa, high efficiency, low noise and strong contamination resistance, widely applied in construction machinery.

1. Main Models & Displacement

- JHP2 Series: Single pump, displacement: 32–100 mL/r

- JHP3 Series: Single, double and triple pumps with large displacement for heavy-duty machinery

- Multi-combination pumps: Available in double/triple combined types to meet multi-circuit hydraulic demands

2. Typical Technical Parameters

- Rated pressure: 25 MPa; Maximum pressure: 31.5 MPa

- Rated speed: 2000 r/min; Maximum speed: 2200 r/min

- Material: Cast iron housing, high-strength alloy gears

- Rotation direction: Clockwise / Counterclockwise optional

3. Structure & Working Principle

Adopts double circular arc gear profile, floating side plate clearance compensation, double-lip oil seal and labyrinth sealing structure.

Working principle: Oil is sucked in via vacuum formed by gear meshing, then pressurized and discharged from the pressure chamber with balanced radial force and low wear loss.

4. Product Advantages

- High pressure & high efficiency with volumetric efficiency over 92%

- Stable operation, low noise and slight pressure fluctuation

- Excellent contamination resistance, adaptable to harsh hydraulic oil environment

- Compact structure, light weight and long service life

5. Application Scope

Construction machinery: Loaders, road rollers, cranes, bulldozers

Mining machinery: Mining excavators, mucking machines, tunnel boring machines

Agricultural machinery: Large harvesters, heavy-duty tractors

Industrial equipment: Hydraulic power stations, aerial work vehicles, port machinery

6. Model Naming Rule (Example: JHP2063)

JHP = Series Code