Vertical turbine multistage centrifugal deep well pump

Vertical turbine centrifugal multistage pump
The long-shaft deep well pump is a vertical multistage centrifugal pump. Its
impeller is installed below the dynamic water level in the well, while the power
unit is positioned above the well and drives the impeller rotation through a long
transmission shaft. The pump body primarily consists of the working section, the
pump-outlet pipe section, and the above-well section. Before starting the pump,
both the suction pipe and the pump chamber must be fully filled with liquid. Upon
operation, the impeller rotates at high speed, causing the liquid to be thrown away
from the impeller under centrifugal force, thereby gaining kinetic and potential
energy. The water flow passes through the volute to eliminate circulation. In a
multistage pump, the liquid is progressively pressurized through successive
impeller stages, with the total head achieved by the water flow being directly
proportional to the number of impeller stages.
When a high head is required, a multistage centrifugal pump with multiple impellers
in series can be used.
The long-shaft deep well pump (such as JC and JCk type) mainly consists of the
working section, the water-lifting pipe section, and the surface section.
Working part
The working section consists of components such as the working parts, suction pipe
parts, and foot valve parts, with the foot valve parts typically used when the
installation depth exceeds 80 meters. The working parts mainly include the upper
shell, middle shell, lower shell (flow guide shell), impeller, tapered sleeve,
shell bearing, guide bearing, and impeller shaft, among other components. The
impeller is usually fixed on the impeller shaft using a tapered opening sleeve. The
JC-type pump employs a closed (enclosed) impeller, while the JCk-type pump uses a
semi-open impeller. Except for the 100JC10, 150JC50, and 150JCk50 models, which
utilize threaded connections between the shells, most other models employ bolted
connections. Wear rings (sealing rings) can be installed on the flow guide shell
and impeller for easy replacement after wear.
The impeller types mainly include three forms: closed, open, and semi-open. A
closed impeller consists of blades, a front cover plate, and a rear cover plate,
offering higher efficiency. A semi-open impeller comprises blades and a rear cover
plate. An open impeller has only blades without front or rear cover plates,
resulting in lower efficiency.
Suction pipe section
The pump discharge pipe section consists of the pump discharge pipe, connecting
pipe, drive shaft, coupling, and bearing housing (support component). The pump
discharge pipes are typically connected via threaded or flanged joints. The drive
shaft is made of 45# steel or stainless steel, with a wear-resistant section plated
with hard chrome. The effective length of this section is twice the bearing length.
When the chrome-plated area wears out, the service life can be extended by swapping
the installation positions of two short discharge pipes or reversing the
orientation of the drive shaft.
Upper part of the well
The wellhead section consists of the pump base assembly, adjusting nut, and power
driving (electric motor or diesel engine). The pump base must bear the weight of
the entire pump casing and working components, and must be securely anchored to a
reliable foundation. A gate valve or check valve can be installed at the outlet as
needed. The power driving typically uses a vertical hollow shaft motor specifically
designed for deep well pumps, equipped with a backstop device. The standard
rotation direction is counterclockwise (viewed from above the motor). The adjusting
nut is used to regulate the axial clearance of the rotor.

Minimum Order: 1 sets

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