It adopts a dual‑purpose design for both high‑pressure external meshing gear pump and gear motor. It can work as a hydraulic pump for oil supply or run in reverse as a gear motor to output torque. Designed to replace Parker and Bucher imported products, this high‑pressure gear component is widely used in travel hydraulics, slewing mechanisms and compact hydraulic systems.
1. Model Code Explanation (Example: MAR‑22‑RA1P)
2. Main Technical Parameters
- Structure: External meshing design with floating side plate clearance compensation, dual‑use for pump and motor
- Housing: High‑strength die‑cast aluminum alloy; Gears: High‑strength alloy steel
3. Key Product Features
1. Dual‑purpose pump/motor design for superior versatility
2. High‑pressure structure with excellent pressure resistance for construction machinery and sanitation vehicles
3. Precision‑machined gears and floating side plates deliver low noise, low leakage and stable long‑term efficiency
4. Interchangeable with imported gear pumps and motors with identical installation dimensions
5. Compact, lightweight design ideal for space‑limited hydraulic systems
4. Application Range
- Sanitation vehicles: Street sweepers, cleaning trucks, garbage trucks
- Construction machinery: Mini loaders, aerial work platforms, truck‑mounted cranes
- Travel hydraulics: Travel motors and slewing motors for mini excavators
- Industrial hydraulics: High‑pressure power units, automation equipment, lifting platforms
- Special vehicles: Wreckers, aerial vehicles, high‑pressure agricultural machinery systems
5. Selection & Installation Guidelines
1. When used as a pump, prioritize flow and pressure; when used as a motor, focus on output torque
2. Ensure sufficient inlet port size to guarantee reliable self‑priming performance
3. Custom keyed shaft and spline shaft available; flanges and ports can be modified to SAE specifications
4. Custom tandem and multi‑section pumps available for multi‑circuit hydraulic systems
MAR Series Hydraulic Gear Pump: Detailed Overview
1. Product Overview
The MAR series hydraulic gear pump is a hydraulic power component featuring external gear design. It achieves fluid suction and discharge through the rotation of two intermeshing gears. Key characteristics include:
• Compact structure: Lightweight aluminum alloy pump body for installation in confined spaces.
• Efficient power transmission: Gear-driven mechanism ensures stable flow output, suitable for industrial hydraulic systems.
• Versatile applications: Widely used in industrial, agricultural, aerospace, and aviation sectors for high-pressure fluid delivery.
2. Technical Specifications (Typical Models)
【表格】
Parameter Range/Value
Displacement 0.19–200 cc/rev (model-dependent)
Rated pressure 230–280 bar (up to 310 bar for some models)
Peak pressure 250–310 bar (short-term tolerance)
Rated speed 2,800–6,000 rpm (model-dependent)
Maximum speed 7,000 rpm (some models)
Volumetric efficiency ≥90% (adjusted per displacement and operating conditions)
3. Structure and Working Principle
1. Key Components:
• Gear pair: Two high-precision gears that create sealed volume changes.
• Pump body: Aluminum alloy housing with inlet and outlet ports.
• Shaft seals: Supports flat keys, rectangular splines, and other connection types.
• Compensation unit: Axial clearance auto-adjustment mechanism to maintain high volumetric efficiency.
2. Operating Principle:
• Suction phase: As gears disengage, volume increases, creating negative pressure to draw fluid from the inlet.
• Discharge phase: As gears mesh, volume decreases, forcing fluid to the outlet under pressure.
• Continuous operation: The driving shaft rotates continuously, ensuring stable flow output.
