Z mojego doświadczenia wynika, że hydraulic machinery, I have often evaluated the advantages and disadvantages of pompy zębate. These pumps are widely used for their efficiency and reliability, making them a popular choice in various industrial applications. However, they also come with some limitations that can impact performance. Understanding both the benefits and drawbacks of gear pumps has been crucial for making informed decisions in system design and maintenance. In this article, I will share my insights on the advantages and disadvantages of gear pumps, providing a balanced perspective that can guide others in selecting the right pump for their needs.

Wstęp

The gear pump is a rotary pump that relies on the change and movement of the working volume formed between the pump cylinder and the meshing gear to transport liquid or pressurize it. Two enclosed spaces are composed of two gears, a pump body, and front and rear covers. When the gears rotate, the volume of the space on the side of the gear disengagement increases from small to form a vacuum to suck in liquid, and the volume of the space on the gear mesh side increases from large Small, and squeeze the liquid into the pipeline. The suction cavity and the discharge cavity are separated by the meshing line of the two gears. The pressure at the outlet of the gear pump depends entirely on the resistance at the outlet of the pump.

The gear pump is a rotary pump that relies on the change and movement of the working volume formed between the pump cylinder and the meshing gear to transport liquid or pressurize it. Two enclosed spaces are composed of two gears, a pump body, and front and rear covers. When the gears rotate, the volume of the space on the side of the gear disengagement increases from small to form a vacuum to suck in liquid, and the volume of the space on the gear mesh side increases from large Small, and squeeze the liquid into the pipeline. The suction cavity and the discharge cavity are separated by the meshing line of the two gears. The pressure at the outlet of the gear pump depends entirely on the resistance at the outlet of the pump.

Advantages of Gear Pumps

①Simple Design and Construction: Gear pumps have a straightforward design with fewer moving parts, making them easier to manufacture, maintain, and repair.

②High Efficiency: They are highly efficient in transferring fluids, offering consistent flow and pressure with minimal slippage.

③Durability and Longevity: Gear pumps are robust and can handle high pressures and a wide range of viscosities. Their solid construction often leads to a long service life.

④Self-Priming Capability: Gear pumps can self-prime, meaning they can pump fluid without needing to be filled with fluid beforehand, which is useful for applications where the fluid supply may not always be consistent.

⑤Constant Output: They provide a steady, non-pulsating flow which is beneficial for applications requiring precise and consistent fluid delivery.

⑥Wide Range of Applications: Gear pumps are versatile and can be used in various industries, including automotive, chemical, food, and beverage, and hydraulic systems.

⑦Compact Size: Their compact design allows them to be easily integrated into systems where space is limited.

Disadvantages of Gear Pumps

①Limited to Low-Viscosity Fluids: Gear pumps are not ideal for handling high-viscosity fluids as it can lead to increased wear and tear and reduced efficiency.

②Not Suitable for Abrasive Fluids: They are not suitable for pumping abrasive or corrosive fluids, as these can cause significant damage to the internal gears and other components.

③Limited Pressure Range: Although gear pumps can handle high pressures, they are not suitable for extremely high-pressure applications compared to other types of pumps like piston pumps.

④Noisy Operation: Gear pumps can be noisy during operation, which might be a concern in noise-sensitive environments.

⑤Leakage and Wear: Over time, gear pumps can experience internal leakage due to wear and tear, which can reduce their efficiency and require more frequent maintenance.

⑥Complex Fluids Handling: They may struggle with fluids containing solid particles or those that are highly volatile or flammable, as the pumping mechanism can cause shear and heating of the fluid.

⑦Fixed Flow Rate: The flow rate of gear pumps is generally fixed and cannot be easily adjusted, which might limit their flexibility in some applications.

External gear pump

●Advantages :The utility model has the advantages of simple structure, light weight, small size, easy manufacture, low cost, reliable work, convenient maintenance, strong self-priming ability, and is not sensitive to oil pollution, and can be widely applied to occasions with low pressure requirements (grinding machines, grinding machines, etc.) Medium and low machine tools).

●Disadvantages:The internal leakage oil is large, the bearing is subjected to unbalanced forces, the wear is severe, the pressure pulsation and noise are large.

Internal gear pump

●Advantages:The utility model has the advantages of compact structure, small size, light weight, small relative sliding, small wear and long service life, and the flow pulsation and noise are much smaller than that of the external gear pump.

●Disadvantages: complex tooth shape, high processing precision and high cost.