Arc pump flow characteristics
Circular arc pump has a small amount of fluid loss, which makes the pump can not reach 100% efficiency, because these fluids are used to lubricate both sides of the bearing and gear, and the pump body can not be seamlessly fit, it can not make The fluid is 100% discharged from the outlet, so a small amount of fluid loss is inevitable. However, the arc pump can still run well and still achieve efficiencies of 93% to 98% for most extruded materials. In the jargon, a circular pump, also called a positive displacement device, is like a piston in a cylinder that is squeezed out mechanically as one tooth enters the fluid space of the other tooth. Because the fluid is incompressible, the liquid and the tooth can not occupy the same space at the same time, so the fluid is eliminated. As a result of the continuous meshing of the teeth, this phenomenon occurs continuously and thus provides a continuous discharge at the outlet of the pump, the same amount of discharge per revolution of the pump. As the drive shaft rotates uninterruptedly, the pump discharges the fluid without interruption. Pump flow directly with the pump speed. For fluids with varying viscosity or density in the process, the pump will not be affected too much. If you have a damper, such as a screen or a restrictor on the side of the outlet, the pump will push fluid through them. If this damper changes during operation, ie if the screen gets dirty, clogged, or if the limiter's back pressure rises, the arc pump will still maintain a constant flow until it reaches the weakest part of the device Mechanical limit (usually equipped with a torque limiter). There is actually a limit to the speed of a pump, which depends mainly on the process fluid. If the oil is delivered, the arc pump can rotate at a very high speed, but when the fluid is a highly viscous polymer When the melt, this limit will be greatly reduced. It is very important to push the highly viscous fluid into the two-tooth space on the side of the suction port. If this space is not full, the pump can not discharge the exact flow rate, so the PV value (pressure × flow rate) is another limiting factor, and Is a process variable Due to these limitations, arc pump manufacturers will offer a range of products with different specifications and displacements (quantities discharged per revolution). These pumps will be matched to the specific application process to optimize system capacity and price.