Kaplan Turbine

A Kaplan turbine is basically a propeller with adjustable blades inside a tube. It is an axial-flow turbine, which means that the flow direction does not change as it crosses the rotor.

1. Scroll Casing

It is a spiral type of casing that has decreasing cross section area. The water first enters into the scroll casing and then it moves through it to the guide vanes and finally to the runner blades. It protects the runner, runner blades guide vanes and other internal parts of the turbine from an external damage.

2. Guide Vanes and Guide Mechanism

Guide vanes are used to direct the water to the runner blades smoothly by decreasing its swirl velocity. If guide vanes is absent than the turbine can not work efficiently and its efficiency decreases. The guides are adjustable in Kaplan turbine. Its opening and closing depends upon the demand of power requirement. In case of more power output requirements, it opens wider to allow more water to hit the blades of the rotor and when low power output requires it closes itself to cease the flow of water.

3. Runner and Runner Blades

Runner is the rotating part of the turbine or we can say that it is the heart of the Kaplan turbine. Its shaft is connected to the shaft of the generator. The runner of the this turbine has a large boss on which its blades are attached and the the blades of the runner is adjustable to an optimum angle of attack for maximum power output. The blades of the Kaplan turbine has twist along its length.

Draft Tube

It is a tube which is used to increases the pressure of the fluid or water that exits the turbine. It has increasing cross section area. Draft tube is used only in reaction turbine. It increases the pressure of the water that leaves the runner blades. Since the water at exit of the turbine has very low pressure and if its pressure is not increased than the back flow of the tail race water takes which can damage the turbine. So to increase the pressure of the exiting water we uses draft tube. It converts the kinetic energy of the water into pressure energy as it passes through draft tube and the pressure of the water increases. The draft tube has to increases the pressure of the water upto such an extent that it must always greater than the pressure of tail race water and prevents the back flow of water from the tail race to the turbine. If it does not happens than cavitation may results and causes damage to the turbine.

Hongya Power Generating Equipment To Utilities Limited, is founded in May,2003 as a professional manufacturer of water turbine generator set. The company is located in a great place which surrounded by Mount WaWu and Emei, a place closed to many famous scenic spots such as Leshan Giant Buddha. The total company land is about 70000㎡, construction part 35000㎡. The employee is about 200 workers, which the R&D part is 25%.

We get more than 100 sets machines for manufacturer process including processing machine and test machine. We can manufacturer Francis turbine, pelton turbine, turgo turbine, Kaplan turbine, synchronous generator, speed governor, brushless excitor, hydraulic hardware etc with unit turbine generator set capacity under 20MW. 

The company get 11 patents and many awards from the official authority, we also get certificate of QMS ISO9001(2008).Our company get good technical and development cooperation with Sichuan university, Xihua university and Sichuan provincial machine R&D research. We are subcontractor of some famous water turbine generator manufacturer such as DEC; Chongqing water turbine works co., LTD, etc. We get good technical support from university and the contractor which enable us a better manufacturer with strong technology skill and rich project experiences.

Till now, HPGE offer a comprehensive range of hydroelectric power plant solutions that cover the entire scope of service including: Small hydro power project consultant; Site management studies; equipment Design; Hydroelectric equipment Manufacture; Project management; Installation guidance; Commission and start operation; Operation guidance; Hydroelectric equipment maintenance.

Products of HPGE are widely used in all around China, we cooperate with more than 300 hydro power plants with more than 600 turbine generators set , including Francis turbine generator set, turgo turbine generator set, pelton turbine generator set, Kaplan turbine generator set, areas covering more than 20 provinces of China and also international markets such as Russia, Belarus, Turkey, Albania, Vietnam, Indonesia, Nepal, Laos, Sri Lanka and Brazil etc.

Processing Equipment