LDD (BB4) high-pressure segmented multi-stage pump

>The series features a single-shell structure, and external pressure-bearing parts can be manufactured using either casting or forging methods.
>Depending on user requirements, the first-stage impeller can be designed as either a single-suction or double-suction structure(first-stage double-suction is used for larger sizes and low cavitation conditions).
>The bearing structure for this series can use the standard ZH series sliding bearings and the ZQ series forced lubrication bearings with a lubrication oil system configured based on specific operating conditions.When selecting bearings, a mechanical oil seal structure is recommended at the bearing seal location.
ZH series sliding bearings: The rotor is supported on the pump body by two radial sliding bearings at both ends. There is a thrust bearing behind the non-driving end’s radial bearing to limit rotor axial movement and withstand residual axial forces.
ZQ series forced lubrication bearings: They consist of externally
lubricated radial sliding bearings and thrust bearings. The radial bearing is a four-wedge structure sliding bearing, while the thrust bearing is a bidirectional oil-injection forced circulation lubricated tilting pad bearing,each equipped with temperature protection and monitoring instruments.
>Inlet and outlet flange ratings can be selected based on different operating conditions, ranging from ANSI 300# to ANSI 2500# raised face flanges(or ring type flanges). Other standards like GB or HG can also be chosen based on user requirements.
>This series of pumps employs a drum-disc-drum combined balancing mechanism, which fully balances axial forces, achieving dynamic balance. During normal operation, the bearings do not bear axial forces,greatly extending the bearing’s service life.