What is a pump?
A device designed to move or lift various liquids is called a pump. Pumps are among the most energy-intensive equipment with a motor, as they consume a large amount of electricity during operation. They operate under variable load, which depends on the rotational speed, so as the speed increases, the load also increases. For optimal operation, pumps require regular maintenance.
Main categories of pump mechanisms
- Piston pumps: During each cycle, a fixed amount of liquid is moved from the inlet to the discharge compartment. This category includes rotary, screw devices, and mechanisms with reciprocal motion.
- Centrifugal pumps: These mechanisms create pressure and fluid flow through its own movement.
In addition, pumps are also classified by the following characteristics:
- Operating principle
- Material of manufacture
- Type of pumped liquid
- Number of stages
- Shaft orientation
- Position of suction openings
Advantages of using pumps
- Reduction of electricity costs and power consumption
- Load characteristics are determined by the type of pump
- Possibility of reverse motor rotation, as well as adjusting fluid flow and pressure
- Compliance with environmental standards
- High reliability
- Prevention of mechanical impacts on the device and hydraulic shocks
AC drives from Yaskawa
Yaskawa drives are precision-controlled power sources for pump systems. They allow for adjusting the speed of the pump, thereby changing its characteristics. Compared to traditional mechanical control methods, Yaskawa drives offer significant advantages in efficiency and reduction of electricity costs. The bidirectional start function ensures smooth operation of the pump mechanism in both forward and reverse directions, as well as the ability to restart it. This manufacturer's devices are equipped with a PID controller for precise regulation.
Classification of pump systems by operating principle
- Centrifugal pump mechanisms (axial flow, radial or mixed)
- Kinetic or dynamic pumps
- Rotary mechanisms (screw and annular)
- Pump systems with reciprocal motion
- Piston devices of positive displacement
- Mechanisms with regenerative turbine