Pumping Solution for Phase II of the Yangtze-to-Huaihe River Diversion Project

Solution Overview

Water Diversion Pumping for Mengcheng, Guoyang and Lixin Waterworks

Shanghai Liancheng (Group) Co., Ltd.

undertook the water diversion gate projects for Mengcheng, Guoyang and Lixin Waterworks,
supplying double-suction centrifugal pump units selected and engineered for the required
flow, head and operating conditions at each site.

Project Background

Phase II of the Yangtze-to-Huaihe River Diversion Project

The main construction scope includes the Mengcheng Station Project, the Mengcheng
Waterworks Diversion Gate Project, the Guoyang Waterworks Diversion Gate Project and the
Lixin Waterworks Diversion Gate Project.

Mengcheng Station is the first station on the Wohe River route of Phase II. Its main
function is to lift water stored upstream of Bengbu Gate on the Huaihe River through the
Wohe River from Mengcheng Station to the upstream side of Mengcheng Gate, helping secure
industrial and agricultural water use along the route above Mengcheng Gate.

At Mengcheng, Guoyang and Lixin, newly built water intakes and pressurizing stations
connect the diversion gates with the river. Together with existing or planned water
conveyance works, the river water is distributed to the relevant waterworks, forming a
complete urban and rural water supply system.

Pump Configuration

Double-Suction Centrifugal Pump Selection for Three Waterworks

Liancheng configured four double-suction centrifugal pump units for each waterworks
diversion gate, including one standby unit at each site.
For related product information, see Liancheng's

S Series single-stage double-suction horizontal split-case centrifugal pump
.

Hydraulic Design

Project-Specific Hydraulic Model and Multi-Condition Analysis

For this project, Liancheng's high-efficiency double-suction pumps were developed from an
advanced hydraulic model and matched to the specified project parameters. Multiple operating
conditions were calculated and then simulated and analyzed using three-dimensional flow
technology.

The relevant parameters were balanced to achieve an appropriate match among the geometric
parameters, resulting in a project-specific hydraulic model designed for high efficiency,
a broad high-efficiency operating range and good cavitation performance.

Staggered-Blade Impeller Design

The impeller uses a staggered-blade design to reduce pressure pulsation and make the
water flow more stable.

Thick-Shaft Design

The thick-shaft design shortens the span between the bearings and improves shaft stiffness,
helping reduce pump vibration and support smoother operation.

Mechanical Verification

Stress and Thermal Analysis for Key Pump Components

Mechanical analysis was carried out using SOLIDWORKS simulation. The model was loaded,
locations of maximum stress were identified, stress analysis was performed, and thermal
analysis was carried out at the bearing positions.

These analyses were used to make the design of the impeller, volute, rotor and bearing
positions more reasonable and reliable, helping ensure the strength and service life of
components under both normal and worst-case operating conditions specified for the project.

Testing & Quality Control

Rotor Dynamic Balancing and Factory Acceptance

Dynamic balancing tests were carried out on the pump rotor components.
The test accuracy was controlled to balance quality grade 2.5 in accordance with
GB/T 9239.1-2006, as specified in the project documentation.

The pump equipment for the Mengcheng and Lixin Waterworks diversion gate projects passed
factory acceptance. According to the original project report, its performance fully met
the customer's requirements and received strong recognition from the relevant departments
of the Yangtze-to-Huaihe River Diversion Project.

Project Delivery

Guoyang Equipment Supply Completed by the End of 2023

The equipment for the Guoyang Waterworks diversion gate project was supplied by the end of
2023. In December 2023, Shanghai Liancheng received a thank-you letter from the Construction
and Management Office of the Jiangshui North Transmission Project of Anhui Water Diversion
Project Co., Ltd.

The letter recognized the completion of the Guoyang Waterworks diversion gate equipment
supply target with the required quality and quantity.

A Project-Specific Pumping Solution for Water Diversion Infrastructure

For the Mengcheng, Guoyang and Lixin Waterworks diversion gate projects, Liancheng combined
site-specific pump selection, multi-condition hydraulic analysis, structural simulation,
rotor dynamic balancing and factory acceptance to meet the specified operating requirements
of Phase II of the Yangtze-to-Huaihe River Diversion Project.

For additional pump ranges and technical references, view the

Liancheng product catalog
.