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As an important equipment in the field of fluid transportation, gear pumps play a key role in industrial applications. According to different application needs and working conditions, gear pumps can be divided into many different types. Understanding the various types of gear pumps is crucial when making a gear pump purchase. This article will introduce some common types of gear pumps to help you make an informed decision in the purchasing process.
1. External gear pump and internal gear pump
External gear pump: The external gear pump consists of a pair of gears that mesh with each other, one of which is the driving gear and the other is the driven gear. This type of pump is suitable for liquids of low to medium viscosity and usually has a higher flow capacity.
Internal gear pump: The internal gear pump consists of an external gear and an internal gear, and the internal gear is sleeved inside the external gear. The inner gear rotates with the rotation of the outer gear, pumping the liquid. Internal gear pumps are suitable for low to medium viscosity liquids with low pumping pulsation.
2. Double gear pump and triple gear pump
Dual gear pump: A dual gear pump consists of two gears that mesh with each other, similar to the structure of an external gear pump. Dual gear pumps are suitable for liquids of various viscosities and typically have higher flow capabilities.
Three-gear pump: Three-gear pumps consist of two external gears and one internal gear. One of the external gears is used as a driving gear, and the other external gear and the internal gear together form a driven gear. Tri-gear pumps are suitable for low to medium viscosity liquids and provide a smooth flow.
3. Internal and external gear pump
Internal and external gear pumps combine the characteristics of internal and external gear pumps, one of which is internal and one external. This pump is suitable for liquids of various viscosities and has good adaptability.
4. Spur gear pump and helical gear pump
Spur gear pump: The rack and pinion of the spur gear pump are arranged parallel to the axis, which has better transmission efficiency. This pump is suitable for medium to high viscosity liquids.
Helical gear pump: The rack and pinion of the helical gear pump is at a certain angle to the axis, so there is slippage in the transmission, and the efficiency is relatively low. Helical gear pumps are suitable for liquids of various viscosities, but are not suitable for high pressure and high speed conditions.
5. High pressure gear pump and low pressure gear pump
High-pressure gear pumps: High-pressure gear pumps are specially designed to handle high-pressure liquids, with stronger structures and tighter sealing systems. These pumps are commonly used in fields such as chemical industry, petroleum and energy.
Low pressure gear pump: Low pressure gear pump is suitable for low to medium pressure liquids, such as lubricating oil, clean water, etc. They generally have a simpler structure and lower cost.
Knowing these different types of gear pumps will help you make an informed choice based on your actual needs when purchasing a gear pump. Selecting a suitable gear pump type based on factors such as liquid properties, pressure requirements, flow requirements, etc. can ensure stable operation of the system, extend equipment life, and improve production efficiency.
