KOBELCO  excavator 2902440-2976A hydraulic pump gear pump

A hydraulic pump, specifically a gear pump, is a fundamental component in hydraulic systems used in various machinery, including excavators, loaders, tractors, and industrial equipment. Here's an overview of what a gear pump is, how it functions, its advantages, and typical applications:

Hydraulic Gear Pump Overview

Function

1. Fluid Transfer: A gear pump is designed to transfer hydraulic fluid from a reservoir to the hydraulic system under pressure.

2. Pressure Generation: It generates flow and pressure by trapping fluid between meshing gears and forcing it into the hydraulic system.

3. Constant Flow: Provides a relatively constant flow of hydraulic fluid, depending on the speed of the input drive (usually an electric motor or internal combustion engine).

Construction and Operation

1. Gear Mechanism: Consists of two meshing gears — a driving gear (connected to the input shaft) and a driven gear (connected to the output shaft).

2. Fluid Chamber: As the gears rotate, they create expanding and contracting chambers that draw in hydraulic fluid from the reservoir and then force it out under pressure.

3. Direction: Typically unidirectional, meaning they pump fluid in one direction.

Advantages of Gear Pumps

1. Simplicity: Relatively simple construction with fewer moving parts compared to other types of hydraulic pumps.

2. Compact Size: Compact design makes them suitable for applications where space is limited.

3. Cost-Effectiveness: Generally more economical compared to other hydraulic pump types.

4. High Efficiency: Provide high volumetric efficiency in delivering hydraulic fluid.

Applications

1. Construction Equipment: Used in excavators, loaders, cranes, and other heavy machinery for various hydraulic functions such as lifting, tilting, and steering.

2. Industrial Machinery: Found in manufacturing equipment, presses, and machine tools where precise control of hydraulic systems is required.

3. Agricultural Machinery: Utilized in tractors, harvesters, and other agricultural equipment for hydraulic operations like lifting implements and steering.

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