Francis Turbine Generator

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Francis Turbine Generator

Francis turbines are built in a compact structure, with high efficiency, and can be applied to a wide range of water heads. This feature makes the Francis turbine type a widely used one around the world. The key Francis turbine components includes Runner, Distributor, Main shaft, Main shaft seal, Turbine guide bearing, Governor, among other.

Application Scope:

Application: Francis Water Turbine Generator Unit
Water head:  20 ~ 700m
Output: 0.01 ~ 1000MW
Frequency:  50/60HZ
Runner diameter: 0.5 ~ 10m
Life Span 30-50 years

Francis Turbine Generator Introduction

1. Advanced CFD, FEA technic is utilized in the designing process to ensure better technical solution.

2. CAE casting simulation is adopted for the produciton of casting parts, this advanced and reliable process plan could help effectively improve product quality.

Francis Turbine Generator

3. All raw material strictly conform to international standard, key component such as runners, guide vane is Forged and entire CNC machined.

Chemical Composition for ASTM A473 S41500 and ASTM A743 CA6NM(%)

ASTM A473 S41500 ≤0.05 ≤0.60 0.5-1.0 ≤0.030 ≤0.030 11.5-14.0 3.5-5.5 0.40-0.80
ASTM A743 CA6NM ≤0.06 Max1.0 Max1.0 ≤0.040 ≤0.030 11.5-14.0 3.5-4.5 0.40-1.0

 Mechanical Property for ASTM A473 S41500 and ASTM A743 CA6NM

Material No. σ0.2(Mpa) σb(Mpa) δ5(%) ψ(%) Akv (J/cm2) HB
ASTM A473 S41500 ≥620 ≥795 ≥15 ≥45 ≥50 ≤295
ASTM A743 CA6NM ≥550 ≥755 ≥15 ≥35 ≥50 ≤285

4. State of the art machining and testing equipment, as well as licensed professional engineers all combined to help guarantee better product precisioness.

5. All product is subject to strict inspection according to international standards and client special requirements.

Francis Turbine Generator

6. With the help of 3D Assembling, through motion simulation, the entire organization interaction can be seen at a glance. This helped a great deal for parts processing and pre-installation.

Francis Turbine Generator

7. Each project will strictly follow manufacturying plan to ensure the delivery date.

Francis Turbine Generator

 

Renovation Project of Huangtankou Hydropower Station

Problems and Renovation Requirements of Huangtankou Hydropower Station:

Max. Head

Hmax=31m

Rated Head

Hr=28m

Min. Head

Hmin=24m

Rated Flow

Q=104.8cms

Rated Output

Pe=26800KW

Rated Speed

n=115.4 rpm

Max. Runaway Speed

np=242 rpm

Suction Height

Hs=+2m

Runner Diameter

D1=3800mm

Blade Number

14

Guide Vane Number

Z0=24

Runner Type

HL820-LJ-380

  • The main problem of the power station is insufficiency of output; the designed rated output of unit is 26MW (26.8MW if generator’s efficiency is calculated by 97%), but the output could only reach 24MW when all units are in full operation, since the installation.

  • According to the requirements of renovation, the output shall be greater than 26MW when all units are in full operation, and allowance shall be reserved for the good stability after unit renovation.

After renovation by Shenyang Getai:

  • After the renovation, the output and efficiency of the unit completely meet the requirements of the contract, with extra power generating ability of more than 30MW.

  • The new runner has high efficiency in the area of big flow and high load, and it operates stably in the high-load area, which could meet the requirements of customer for long-term stable operation of the runner in the full load area.

  • Strictly control the quality of runner casting, and provide testing block cut from the same castings in each furnace to the third party for strict inspection and test; strict NDT and overall annealing treatment for the welding work, to remove residual stress.

  • Generally speaking, this renovation project has achieved the purpose to upgrade the efficiency and capacity of the unit. The rated output of the new unit has reached 28MW (higher than 27MW estimated in the feasibility study report). The new unit has a good economic performance, so it may reduce the time to recover the cost.

Francis Turbine Generator

Power Station Outdoor Scene

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