1MW Small Francis Turbine / Water Turbine Generator Hydro Power Project

1MW Small Francis Turbine / Water Turbine Generator Hydro Power Project

1. Water inlet parts

Water inlet parts consist of connecting pipe, turbine inlet valve and expansion joint. Turbine inlet valve is used to close the unit in static water when need stop, it is also used to close the unit and cut the water flow in dynamic water when the unit is in emergency and turbine distributor break down. Expansion joint is used to compensate installation error and for the convenience of maintenance. Water drainage valve is located on the bottom. One end of connecting pipe is connected with the turbine inlet valve; another end is connected with the pipe of power plant (welded at site).

2. Spiral case

Spiral case is welding part, equipped with fixed guide vane in it. Spiral case shall make the water become number of swirl of water flow and guide water to flow regularly into guide vane apparatus and runner along circumference. It is equipped with an air relieve valve on the top of spiral case to exhaust air when filling water initially.

3. Turbine distributor

It consists of guide vane, guide vane lever, shaft sleeve, front cover, back cover, etc. It can form or change number of swirls of water flow to adjust turbine discharge according to variation of load. It is also used to normal and emergency shut down. The shape, dimensions, quantity and position of the 16 guide vanes is similar to the accepted model turbine, shall ensure the water flow won't cause vibration during operating. Diameter of spacing circle of guide vane is 860 mm. The guide vane has the hydraulic torque performance of self-close trend within the range from full opening to near no-load opening. The maximum opening of guide vane shall have certain margin. Stop block is equipped for each guide vane, the guide vane can be controlled to swing with certain range and won't hit with other guide vanes when the shear pin is broken and the friction device between guide vane and guide vane lever is out of service. The guide vane is made of ZG230-450, they shall be interchangeable. Each guide vane is machined precisely; the contacting line of adjacent guide vanes shall be finished to ensure perfect contact of all guide vanes under closing state in order to reduce water leakage. The bearings for guide vane shaft and distributor shaft are self-lubricated sliding bearings; the bearing shoe adopts steel back complex material. Use guide vane lever end cover and bolt to adjust and keep the position of each guide vane to the front cover and the rear cover. The sealing is located on upper guide vane shaft to cut the flow. The control ring is made by cast steel as a whole. Circular wiring plate is located on the external circumference of the control ring. The control ring has enough strength and rigidity, won't occur excessive bending due to unbalance stress of servomotor.

4. Runner

Runner is the heart of the turbine; it can transfer water energy to mechanic energy. Runner is welded as a whole, crown, band and blade is made of stainless steel ZG0Cr13Ni4Mo which has perfect performance of anti-cavitation, anti- corrosion and weldable. Crown and band adopts gap type sealing to reduce water leakage. Shape of each runner blade shall be machined according to standard GB/T 10969 "Specifications for water passage components of hydraulic turbines". The runner is welded and heat treated according to special specification, subject to non-destructive inspection according to ASME standard. The runner is subject to static balance testing after machining. Sixteen φ22 holes are located on runner crown in order to reduce the pressure applied on runner by the water.

5. Main shaft part

It consists of main shaft, fly wheel, etc. This type of hydraulic power generating unit adopts four fulcrums construction. Main shaft is made of 45# quality carbon construction steel. Disc type cast fly wheel transient stabilizes the unit when adjusting. Connect the main shaft and the runner by flat key to satisfy the interchangeable. Connect the turbine and generator by spring coupler for easy installation.

6. Main shaft service sealing

Main shaft service sealing is packing set, located on main shaft pass through the front cover. The service sealing is close, anti-friction, simple, easy to observe, maintenance and replace. Stainless steel shaft sleeve is located where the main shaft contacting with the packing. The packing is made of reinforced PTFE, anti-friction, anti-corrosion.

7. Draft tube assembly

Draft tube assembly consists of diffusing pipe, draft tube elbow and draft tube cone, guide the water flow into lower stream, make use of the potential energy of water flow at suction height, recycle major kinetic energy of the flow at runner outlet by its diffusion. All connecting flange shall be sealed, immersed depth of draft tube shall not be less than 40cm to prevent air entering into draft tube. Air admission device: Natural air is filled to lower of runner through the top of diffusing pipe to ensure steady operation of turbine when the guide vane under partial opening.

8. Servomotor assembly

It consists of servomotor, fork and ear pin.

Governor adjusts the opening of guide vane through servomotor, fork, ear pin and control ring according to the change of load.

9. Pressure gauge and vacuum gauge

Pressure gauge is located on spiral case for observing the pressure in spiral case. Vacuum gauge is located on diffusing pipe for observing the degree of vacuum of tailrace water. Cocks shall be equipped on pressure gauge and vacuum gauge piping for close and open the piping.

10. Braking device

It adopts 2 pneumatic piston type brakes, service pressure is 0.5~0.7 MPa.

Adopt pneumatic principle for the brake. Provide pressure source through seamless steel pipe to the brake, push the brake plate to rub the fly wheel to stop the unit. In case there is air leakage during operating, adopt appropriate method to solve it, such as tighten the loose nut by spanner or replace sealing material. The stroke of piston is 25mm. Adopt braking only when unit speed drops to below 30 % of rated speed!

 water turbine generator unit


Factory Test

Under Installation

Company Information
Fuchun Industry Development Co., ltd Shenzhe is an experienced manufacture and engineering Company in small scale hydro power equipment ( 50Kw to 50Mw). We play the role of manufacture and EPC contractor and could supply water to wire equipments and services.

We provide customers with the complete package, from the design and manufacture of the turbine, generator and control equipment through to installation, commissioning and ongoing repair and maintenance.

1.Water Turbine Generator Unit Design & SUPPLY
2.Hydropower equipment supply 
3.Feasibility study of hydropower project
4.Manufacture
5.Installation & Supervision
6.Commissioning and Training service
7. Hydro power plant rehabilitant
8. Hydro power plant spares supply
9.Services

Prominent Design 
Professional Service
Prime Products  
Prestigious Manufacturer 

Our factory occupies 560,000 square meters of land,which inculdes 18 workshops,over 320 sets of heavy and precision producing and testing machinery;scientific research development center in the southern China,and various testing facilities.Besides of our 50 years industrial experice and expertise, we also hold close ties with several research institutions and universities in this field in order to maintain advanced technology and to develop new products.More than 20 kinds of our products have been granted national or provincial technical progress and excellent products awards.We fully carry out the ISO9001 quality management system.Our products can meet IEC standard and CE requirements.

Fabricating Machinery
Horizontal Lathe, MC1363 cylindrical grinding machine, B1016A facing machine,Two points closed pressural machine, CQ5250 CNC Double Column Vertical Lathe, CNC Flame Cutting machine, 500T Press machine 500T, VacuumPressure Impregnating, the production line of resin-bonded sand and so on.

Packaging & Shipping
 standard export packing, wooden cases, structural steel, seaworthy packing