Francis turbine with double runners
A mixed-flow, double-runner technology, used in the field of fluid machinery, can solve the problems of cracked movable guide vane bearings, strong vibration, damage, etc., and achieve the effects of increasing stability, prolonging cycle, and increasing service time.
Active Publication Date: 2020-10-09
福州偌晟科技有限公司
View PDF10 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
This patent application seeks to reduce pressure pulsation in Francis pump-turbines, a phenomenon that can lead to hydraulic resonance between the rotating radial pressure mode and the runner or top cover structure, which can cause strong vibration, noise, Cracks or damage to movable guide vane bearings
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0009] exist figure 1 Among them, the Francis turbine with double runners has runners in its structure, and there is a main shaft 3 in the middle of the guide vanes 4 uniformly distributed on the circumference between the top cover 6 and the bottom ring 7, and the main shaft 3 is connected with a radial runner 1, and the radial runner There are helical blades 2 on the runner 1, and the helical blades 2 are evenly distributed on the circumference of the main shaft 3. The following of the main shaft 3 is equipped with a water discharge cone, and a water discharge cone blade 5 is arranged on it. The lowermost end of the main shaft 1 is equipped with an axial flow runner 8 .
[0010] The working method of the Francis turbine with double runners is that when the water rotates along the guide vane 4 and enters the runner chamber, pushes the obliquely downward side of the spiral blade 2, the component force in the tangential direction makes the radial runner 1 rotate, and the vertic...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a double-rotating-wheel mixed-flow water turbine. A spindle is arranged between guiding blades circumferentially evenly distributed between a top cover and a bottom ring; the spindle is connected with a radial-flow-type rotating wheel; more than five spiral blades are arranged on the radial-flow-type rotating wheel, circumferentially evenly distributed with the spindle as the center and spirally ascend around the axis of the spindle; a runner cone is mounted below the spindle, and runner cone blades are arranged on the runner cone; and an axial-flow-type rotating wheelis mounted at the lowermost end of the spindle. When water rotatably enters a rotating wheel chamber along the guiding blades, the inclined lower portions of the spiral blades are pushed, and the radial-flow-type rotating wheel rotates through component force in the tangent direction; after flowing through the guiding blades, the water passes through the runner cone to apply force to the runner cone blades, that is, the spindle is stressed for the second time; and finally, the water flows through the runner cone and then applies force to the axial-flow-type rotating wheel, that is, the spindleis stressed for the third time, and thus rotation torque of the spindle is increased.
Description
technical field [0001] The invention relates to a Francis water turbine, especially a "double-runner Francis water turbine", which belongs to a fluid machine and is mainly used for power generation of water conservancy dams and water storage for power generation. Background technique [0002] Chinese patent application number: 201210524582.4, "Method for Improving Pressure Fluctuation of Francis Pump-turbine", a method for improving pressure fluctuation of Francis pump-turbine, including selecting the appropriate number of movable guide vanes Z g and determining a reasonable guide vane distribution circle Diameter D g and determining a reasonable distance δ from the runner to the fixed side can improve the pressure pulsation in front of the runner after the guide vane of the Francis pump turbine. This patent application seeks to reduce pressure pulsation in Francis pump-turbines, a phenomenon that can lead to hydraulic resonance between the rotating radial pressure mode and ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): F03B3/12F03B3/18F03B13/00
CPCF03B3/121F03B3/183F03B13/00Y02E10/20
Inventor 许可姚晓光许昌义
Owner 福州偌晟科技有限公司