JHP2 Series gear pumps

1. Product Overview

2. Structural Features

• Independent Oil Circuit Design: The main and auxiliary pump oil passages are completely separated, with a built-in check valve to prevent oil circuit crosstalk. The main pump provides high-flow and high-pressure oil for working devices, while the auxiliary pump is dedicated to controlling auxiliary systems such as steering and braking, achieving the dual effect of “strong load capacity and precise light-load control”.
• Enhanced Sealing & Bearing System: Adopting DU bearings combined with double-lip sealing structure, it effectively blocks pollutants in dusty environments such as mines and ports, extending the maintenance cycle to over 2000 hours. The bearing system maintains excellent load-bearing capacity (allowable specific pressure up to 44MPa under proper lubrication) and low friction coefficient.
• Optimized Gear Profile: Equipped with involute cycloidal straight teeth, the gear profile is precision machined to reduce flow pulsation and operating noise. The optimized meshing clearance minimizes internal leakage, improving volumetric efficiency and ensuring smooth oil delivery even during compound actions.
• High-Strength Pump Body: The pump body is made of high-strength wear-resistant nodular cast iron, which can withstand high-pressure impact loads in complex working conditions, avoiding cracks and deformation, and ensuring stable operation in harsh environments.

3. Technical Parameters

4. Applications

• Construction machinery: 5-8 ton wheel loaders (lifting + steering systems)
• Lifting and transportation equipment: 16-25 ton truck cranes (luffing + slewing mechanisms)
• Environmental sanitation equipment: Large-scale garbage compression trucks (compression + lifting devices)
• Mining machinery: Mine mucking loaders (conveying + traveling hydraulic systems)

5. Operational & Customization Notes

• The coaxiality error between the pump shaft and power source shall be ≤0.1mm to avoid bearing wear caused by excessive radial force. The diameter of the oil inlet pipe shall not be less than 32mm, and the oil suction height shall be controlled within 500mm to ensure smooth oil suction.
• Fill the pump with hydraulic oil before the first start-up, and put it into operation after exhausting air. It is recommended to match with a 10μm precision return oil filter to extend the service life.
• Displacement combination, flange type, shaft end form and oil port size can be customized according to customer requirements (MOQ: 5 units for logo/packaging customization).
• Warranty: 6 months for non-human damage; 1-year warranty available for customized orders. The maintenance cycle can reach over 2000 hours in harsh environments.