1.Suction chamber of conical pipe :
The flow rate of the liquid is increased by the contraction type conical pipe, which can increase the flow rate of the impeller inlet. And the velocity distribution is uniform, and the radial direction of the impeller can be entered. He is more used in the cantilever structure of the pump. The suction chamber is generally 7 degrees ~18 degrees.
2.Annular suction chamber :
In the suction chamber, the vortex area is formed in the back of the pump shaft through the pump shaft through the suction chamber, which causes the uneven flow velocity distribution of the impeller and the impact and the eddy current loss when the liquid enters the impeller. The suction chamber is used in multi-stage pump, because the pump head is high, the hydraulic loss of the suction chamber is not large.
3.Half spiral suction chamber :
This section of the suction chamber is gradually decreased, the water pipe in the water flow accelerating, on the other hand, the liquid produced in pre swirl into the impeller, reduces the pump head, but can eliminate the vortex zone behind the pump shaft, so that the liquid flow evenly into the impeller. The spiral suction chamber is provided with a separating rib, in the direction of 45 degrees. Semi spiral suction chamber is widely used in double suction centrifugal pump and multi-stage volute pump.
