Types and classification of multi-stage centrifugal slurry pump
Single stage centrifugal slurry pump generated head is limited, in order to obtain higher lift, then use the series work, namely uses the multistage centrifugal slurry pump. The use of the scope and type B slurry pump is the slurry pump of the same, which is characterized by high lift. Multistage centrifugal slurry pump can be divided into sectional multi-stage centrifugal slurry pump and impeller of multistage centrifugal slurry pump two structure forms.
1 sectional multi-stage centrifugal slurry pump
This kind of centrifugal slurry pump performance, flow and pressure range, widely used in petrochemical production. For segmented D horizontal multistage centrifugal slurry pump structure. This type of centrifugal slurry pump flow rate is in the range of 5~750mVh, head of up to 3000m. The slurry pump body is a vertical split multi section type structure, composed of a first section, a tail section and a middle section, with four bolts are connected as a whole. The slurry pump shaft is arranged in the middle of a multistage impeller, impeller are equipped with a guide wheel each drainage. Both ends of the shaft bearing and a bearing body. Shaft seal device are symmetrically arranged part extends out of the slurry pump head section and the rear section of the slurry pump shaft. Because the impeller in one direction are arranged on the shaft, each impeller has an axial force, so the total axial force step by step addition must be large, dynamic balance disc with parallel axial force on the impeller. Sectional multi-stage centrifugal slurry pump manufacture is convenient, the slurry pump body segments can be respectively processed, but the structure is complex, difficult disassembly.
2 open multi-stage centrifugal slurry pump
Vertical multistage centrifugal slurry pump with volute slurry pump body, the equivalent of several single stage volute slurry pump is installed on the same shaft in series, each impeller has a corresponding cochlear room, so it is also called the volute slurry pump. Because the body is open standards, the inlet and outlet are directly cast on the slurry pump body, the maintenance is very convenient. Repair the slurry pump cover is open, you can remove the entire rotor, does not need to be disassembled connecting pipe. The impeller is usually even symmetrical layout, eliminates the unbalance axial force, so do not need to install the axial force balancing device. In open multistage centrifugal slurry pump is compared with the performance of the sectional multi-stage centrifugal Gao casting technology and processing technical requirements of high, volume is large, the flow range of 450? 20000m3/h, the maximum lift 1800m.
Post time: Jul-13-2021