Advantages and disadvantages of gear pump and its application in hydraulic system

advantage
· Simple structure: gear pump design is compact, fewer parts, easy to maintain.
· Low price: gear pump manufacturing costs are relatively low, so it has a high cost performance.
· Good durability: Due to the mechanical meshing principle, gear pumps are usually wear resistant and have high reliability.
· Moderate pressure: can produce moderate pressure, suitable for low and medium pressure hydraulic system.
· Good starting performance: good starting performance, even in cold environments can be quickly started.

shortcoming
Flow fluctuation: the flow fluctuation of the gear pump is relatively large, which may cause system vibration.
Solution:
Buffer: A buffer or accumulator is installed in the hydraulic system to smooth the pulsating flow output of the gear pump and reduce the system vibration.
Optimized gear design: Double gear or multi-tooth meshing design is adopted to reduce the flow pulsation between gears and smooth output.
Use high-precision machining technology: Improve the machining accuracy of gears to reduce flow pulsation.

· Large noise: the noise generated by gear meshing is high, which is not suitable for noise-sensitive environments.
Solution:
Use a noise reduction design: use a tooth profile with noise reduction characteristics (such as helical gears), or optimize the gear mesh to an involute tooth profile to reduce noise.
Install soundproofing: Add soundproofing enclosures or soundproofing materials to the system to reduce noise transmission.
Replace the oil: Choose the appropriate viscosity of the hydraulic oil to help reduce the formation of bubbles and noise in the pump.

Limited range of applicable pressure: gear pumps are usually suitable for medium and low pressure hydraulic systems and cannot meet high pressure demands.
Solution:
Dual pump system: The gear pump is combined with other types of hydraulic pumps to form a dual pump system, which starts the plunger pump when the high pressure is required, both to meet the pressure requirements and maintain the flexibility of the system.
Improve gear materials and manufacturing processes: select materials with higher strength (such as high-strength alloy steel) to enhance the pressure resistance of the gear, and heat treatment to increase the strength of the gear.（RCHC can supply high pressure hydraulic pumps）
Reasonable choice of application: in occasions with low pressure demand, such as agricultural machinery and light industrial equipment, the use of gear pumps is preferred, and other types of hydraulic pumps are used in occasions with high pressure demand.

Apply
Gear pump because of its unique characteristics, widely used in the following fields:

Agricultural machinery: hydraulic systems such as tractors and combine harvesters.
Construction machinery: such as excavator, loader hydraulic transmission system.
Industrial equipment: such as machine tools, injection molding machine hydraulic power source.
Light vehicles: such as forklifts, stackers and other vehicles that need hydraulic lifting.