The centrifugal pump is the most common pump on the market. Depending on the pressure/capacity, centrifugal pumps all have the same structure: the impeller has a suction side in the center as standard that, as it suggests, sucks the liquid in through the suction connection in the housing. This is generated because the shape of the impeller blades pushes the liquid out of the outlet (pressure side) of the pump housing by a combination of speed and centrifugal force. The pump can be divided into three parts: the bearing bracket, the liquid part and the shaft seal(s).
This is the part where a generally cast housing supporting the pump shaft and bearing is housed complete with seal. On one side there is the so-called axle journal for the coupling to a drive, on the other side the axle journal with, for example, screw thread for the drive of the impeller.
This is an integral part between the liquid part of the pump and the shaft. This refers to a mechanical seal such as a wear sleeve gasket (the name comes from simple square gasket rings that are stationarily mounted in a chamber in the back plate of the pump fluid part. A so-called wear sleeve is then mounted on the shaft that rotates with the shaft, the sleeve prevents the main shaft of the pump from being damaged. More commonly used nowadays are so-called "mechanical seals", which actually also have a stationary and a rotating part, but use extremely flat races that, if correctly chosen and mounted, ensure the seal to a very high degree. guarantee sealing.
There are also pumps where a magnet drive is chosen, which is actually a bearing bracket in which two magnet-filled bowls rotate that are separated by an intermediate bowl, also called a “bowler hat” because of the model. There is a slight loss of efficiency due to the "slip" between the magnets, but this gives an almost 100% guarantee of sealing if the material choices are right. These drives are relatively expensive to purchase and are mainly used if there is absolutely no emission from the product or if absolutely nothing from outside is allowed to enter the product/medium.
These are actually three parts, a pump housing in which the impeller rotates and a back plate that seals the liquid part together with the pump housing. The parts are; a pump housing with a suction and a pressure connection, in which the impeller rotates. The rear of the housing is closed by a back plate through which the axle comes through and the axle seal is mounted.
.png)
