Features and Performance Analysis of Two Gear Pump
A gear pump is a type of positive displacement pump which uses rotating gears to move liquid or gas from one place to another without creating suction or pressure within the confines of the pump itself. They are commonly used in industrial applications and in the automotive industry, and are available in a variety of sizes and configurations.
There are two basic types of gear pumps: external and internal. External gear pumps are the most common type and are used to deliver large quantities of oil at a steady rate. These pumps are typically powered by either a direct drive electric motor or a belt transmission. Internally these pumps have two meshing gears that spin in opposite directions, and the motion of the gears creates the pumping action.
Internal gear pumps work similarly to external gear pumps, however they are constructed in a different way. Internal pumps have one gear that is fixed in the center of the chamber and the second gear is free to spin. As the free gear rotates, it displaces liquid in the chamber, which allows it to be pumped out. Due to their design, internal gear pumps provide higher pressures and flow rates than external pumps, making them ideal for applications that require significantly higher pressure and flow.
When deciding which type of gear pump to purchase, a number of factors should be taken into consideration. These include the type of fluid being pumped, the amount of pressure or flow required, the operating environment, and the application in which it will be used. Both types of gear pumps have their own unique features and benefits, and each has its own set of disadvantages.
External gear pumps are cost effective and easy to maintain, but are limited in terms of their high pressure capabilities. They are typically used for applications where low to medium pressure is required and the liquid being pumped is relatively clean. They are also prone to cavitation, which is when the fluid in the pump is rapidly depleted, causing noise and vibration, and potentially damaging the pump.
Internal gear pumps, on the other hand, are generally more efficient and provide higher pressures, but they can be more challenging to maintain. The most common application for internal gear pumps is in high pressure systems, such as fuel injection systems in diesel engines. Due to their construction, they are also less prone to cavitation and provide higher levels of performance.
Overall, both external and internal gear pumps have their advantages and disadvantages, but both are an excellent choice for a variety of applications. The choice between the two types should ultimately be based on the specific needs and requirements of the application.
