Multistage centrifugal pump assembly

multistage centrifugal pump is the set of two or more pumps, fluid channel structure and performance in the first level of medium pressure mouth and second-level imports are interlinked, the second level of medium pressure mouth and the third level of imports are interlinked, so formed a multistage centrifugal pump series of institutions. The significance of multistage centrifugal pump is to improve the set pressure.

multistage centrifugal pump assembly, all the threads of the bolt and nut to daub a layer of white oil. After the final impeller assembly, to measure the wheel hub and balance disc hub axial distance between two face, according to the axial distance decide which block of the axial size. Block set with the impeller wheel, block set and the sum of balance disc hub axial gap between 0. 30 ~ 0. 50mm。 Because of multistage centrifugal water pump in the early to drive the impeller shaft parts such as affected by the high temperature medium first, and axial heat effect in the next, with their inflation have time difference. With 0. 3 to 0. 5 mm axial clearance, is to prevent the impeller, the balance disc such as expansion and top each other die first, so that cause the water pump shaft larger tensile stress.

at the beginning of the long dry bolt in the assembly, only slightly tight a tight. After the multi-stage pump in place at the scene, in according to the recorded data of long rod bolt fastening. When fastening must be symmetrical operation, otherwise, will cause bad sealing between paragraphs.

multistage centrifugal pump with balance disc holder pressure circle, to the top of a gap on balance pipe interface. Otherwise, the balance of the pipe is closed, the axial balance device will not work.

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