CN102011672A - Radial-axial flow turbine employing novel guide blade and runner blade profile - Google Patents

Radial-axial flow turbine employing novel guide blade and runner blade profile Download PDF

Info

Publication number
CN102011672A
CN102011672A CN2010105885427A CN201010588542A CN102011672A CN 102011672 A CN102011672 A CN 102011672A CN 2010105885427 A CN2010105885427 A CN 2010105885427A CN 201010588542 A CN201010588542 A CN 201010588542A CN 102011672 A CN102011672 A CN 102011672A
Authority
CN
China
Prior art keywords
runner
turbine
blade
turbine blade
guide blade
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN2010105885427A
Other languages
Chinese (zh)
Other versions
CN102011672B (en
Inventor
王正伟
孙德港
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tsinghua University
Original Assignee
Tsinghua University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tsinghua University filed Critical Tsinghua University
Priority to CN2010105885427A priority Critical patent/CN102011672B/en
Publication of CN102011672A publication Critical patent/CN102011672A/en
Application granted granted Critical
Publication of CN102011672B publication Critical patent/CN102011672B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/20—Hydro energy

Landscapes

  • Hydraulic Turbines (AREA)

Abstract

The invention belongs to the technical field of fluid machinery and engineering equipment, and in particular relates to a radial-axial flow turbine, in particular to a radial-axial flow turbine employing a novel guide blade and runner blade profile. The turbine comprises a volute, a fixed guide blade, a movable guide blade, a runner and an exhaust water pipe; the shape of a nose baffle of the volute and the shape of the movable guide blade are designed, and a brand-new guide blade profile, so the flow is smoother, and the resistance loss in a flow channel is lower; the height difference between an upper crown and a lower ring surface, the length of a straight cone of the exhaust water pipe and a flow angle of outlet liquid of the turbine blade are newly designed; and a novel thickness change rule is adopted for the runner blade from an inlet to an outlet. The novel turbine improves the efficiency, reduces the vibration and pressure fluctuation, improves the mechanical strength of the runner, and reduces dynamic stress of the runner blade. Therefore, the probability for generating cracks on the runner blade is greatly reduced, and the operating stability of the turbine is improved.

Description

A kind of Francis turbine that adopts novel guiding blade and runner bucket molded lines
Technical field
The invention belongs to the Fluid Machinery and Engineering equipment technical field, particularly a kind of Francis turbine relates in particular to a kind of Francis turbine that adopts brand-new stator molded lines and runner bucket thickness distribution rule.
Background technique
The domestic mixed-flow wheel unit that has built up a plurality of 80 meters head sections, the runner form is rich and varied.
Its main runner characteristics are that runner adopts X type blade, i.e. negative incidence is adopted in import, and going out the waterside is distorted shape, is seen as X-shaped from the runner inlet side.This blade shape can better adapt to big head of luffing and load, makes the pressure of Ye Daonei and velocity distribution more even.The ubiquitous defective of water wheels unit of this pattern is that operation stability is poor at present, and vibration and pressure pulsation are bigger, and the runner bucket dynamic stress is bigger, and runner bucket is cracked.
Summary of the invention
The objective of the invention is to propose the Francis turbine of high employing novel guiding blade of a kind of stability and runner bucket molded lines.
Technological scheme of the present invention is:
This water turbine comprises spiral case, fixed guide vane, movable guide vane, runner and draft tube.
The nose baffle plate of described spiral case changes the curved baffle that radius R is 430～450mm into.
Be to increase inflow-rate of water turbine, change the shape of described movable guide vane into the negative cruvature stator, the closed curve that the stator molded lines is made up of two sections quadratic curves of connecing of joining end to end, the equation of two quadratic curves is respectively: y=-0.002x 2+ 0.078x+3.972, y=0.006x 2-0.010x-4.501.
The structure of runner is: several turbine blades are installed in the side of the runner crown on top, the lower end of turbine blade install with the coaxial runner of runner crown under encircle, the height difference h of crown and following anchor ring, promptly described runner crown and the contacted peak of turbine blade are 115～125mm to the distance between following ring of described runner and the corresponding peak of turbine blade.
The intermediate cross-section of described turbine blade is the closed curve that the curve of two sections end-to-ends is formed, and two curve's equation are respectively:
y＝-0.0000007x 4-0.00003x 3+0.011x 2-1.126x+4.046，
y＝-0.00005x 3+0.011x 2-0.902x-5.611。
The outlet flow angle α of described turbine blade is 14～18 °.
Increase the right cone segment length of described draft tube, making stator center to the height difference H of draft tube base plate on the described runner is 1000～1050mm.
Beneficial effect of the present invention is: improved turbine efficiency with respect to other existing units, reduce vibration and pressure pulsation, increased the runner mechanical strength, reduced the runner bucket dynamic stress, make runner bucket the crackle probability occur and reduce greatly, the operation stability of water turbine is improved.
Description of drawings
Fig. 1 is the schematic representation of Francis turbine structure;
Fig. 2 is the sectional drawing of francis turbine runner;
Fig. 3 is the layout plan of water turbine fixed guide vane and movable guide vane;
Fig. 4 is the sectional view of spiral case nose;
Fig. 5 is the shape schematic representation of movable guide vane;
Fig. 6 is a runner bucket intermediate cross-section schematic representation;
Fig. 7 is the outlet flow angle schematic representation of turbine blade.
Number in the figure:
The 1-spiral case; The 2-fixed guide vane; The 3-movable guide vane; The 4-rotary wheel of water turbine; The 5-draft tube;
The 6-runner is ring down; The 7-turbine blade; The 8-runner crown; The 9-fixed guide vane; The 10-movable guide vane;
The 11-spiral case inlet; 12-nose baffle plate.
Embodiment
The invention provides a kind of Francis turbine of novel runner, the present invention will be further described below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, this water turbine comprises spiral case 1, fixed guide vane 2, movable guide vane 3, rotary wheel of water turbine 4 and draft tube 5.
As shown in Figure 2, the structure of rotary wheel of water turbine 4 is: several turbine blades 7 are installed in the side of the runner crown 8 on top, the lower end of turbine blade 7 install with the coaxial runner of runner crown 8 under encircle 6, the height difference h of crown and following anchor ring, promptly described runner crown 8 and turbine blade 7 contacted peaks are 115～125mm to the distance between following ring 6 of described runner and turbine blade 7 corresponding peaks.
As shown in Figure 4, the nose position of spiral case 1 remains unchanged, with spiral case inlet 11 rears nose baffle plate 12 change the curved baffle that radius R is 430～450mm into.
As Fig. 3 and shown in Figure 5, fixed guide vane 2 is positioned at the outer ring of movable guide vane 3; Be to increase inflow-rate of water turbine, the shaped design of described movable guide vane 3 is become the negative cruvature stator, its thickness is reduced, the closed curve that the stator molded lines is made up of two sections quadratic curves of connecing of joining end to end, the equation of two quadratic curves is respectively:
y＝-0.002x 2+0.078x+3.972
y＝0.006x 2-0.010x-4.501
As Fig. 2 and shown in Figure 6, be to guarantee the hydraulic performance and the structural strength of runner, the intermediate cross-section of turbine blade 7 is designed to the closed curve that the curve of two sections end-to-ends is formed, two curve's equation are respectively:
y＝-0.0000007x 4-0.00003x 3+0.011x 2-1.126x+4.046，
y＝-0.00005x 3+0.011x 2-0.902x-5.611。
As shown in Figure 7, go out stream for guaranteeing the outlet of rotary wheel normal direction, reduce the pressure pulsation in the draft tube 5, the outlet flow angle α of turbine blade 7 is adjusted into 14～18 °.
As shown in Figure 1, increase the right cone segment length of described draft tube 5, making stator center to the height difference H of draft tube base plate on the described runner is 1000～1050mm.
The present invention tests on HLY267-370 type Francis turbine, has analyzed the flow losses of each several part runner, has analyzed flow channel shape and has changed energy characteristics, cavitation performance and stable influence, has analyzed the hydraulic performance of different operating conditionss.Pass test data and actual effect, can find, use unit of the present invention to improve efficient with respect to other existing units, vibration and pressure pulsation have been reduced, increased the runner mechanical strength, reduced the runner bucket dynamic stress, made runner bucket the crackle probability occur and reduce greatly, the operation stability of water turbine is improved.

Claims (1)

1. a Francis turbine that adopts novel guiding blade and runner bucket molded lines comprises spiral case (1), fixed guide vane (2), movable guide vane (3), runner (4) and draft tube (5), it is characterized in that,
The nose baffle plate of described spiral case (1) changes the curved baffle that radius R is 430～450mm into;
Be to increase inflow-rate of water turbine, change the shape of described movable guide vane (3) into the negative cruvature stator, the closed curve that the stator molded lines is made up of two sections quadratic curves of connecing of joining end to end, the equation of two quadratic curves is respectively: y=-0.002x 2+ 0.078x+3.972, y=0.006x 2-0.010x-4.501;
The structure of runner (4) is: several turbine blades (7) are installed in the side of the runner crown on top (8), the lower end of turbine blade (7) install with the coaxial runner of runner crown (8) under encircle (6), the height difference h of crown and following anchor ring, promptly described runner crown (8) and the contacted peak of turbine blade (7) they are 115～125mm to the distance that described runner encircles between (6) and the corresponding peak of turbine blade (7) down;
The intermediate cross-section of described turbine blade (7) is the closed curve that the curve of two sections end-to-ends is formed, and two curve's equation are respectively:
y＝-0.0000007x 4-0.00003x 3+0.011x 2-1.126x+4.046，
y＝-0.00005x 3+0.011x 2-0.902x-5.611；
The outlet flow angle α of described turbine blade (7) is 14～18 °;
Increase the right cone segment length of described draft tube (5), making stator center to the height difference H of draft tube base plate on the described runner (4) is 1000～1050mm.
CN2010105885427A 2010-12-08 2010-12-08 Mixed flow turbine employing novel guide blade and runner blade profile Expired - Fee Related CN102011672B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010105885427A CN102011672B (en) 2010-12-08 2010-12-08 Mixed flow turbine employing novel guide blade and runner blade profile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010105885427A CN102011672B (en) 2010-12-08 2010-12-08 Mixed flow turbine employing novel guide blade and runner blade profile

Publications (2)

Publication Number Publication Date
CN102011672A true CN102011672A (en) 2011-04-13
CN102011672B CN102011672B (en) 2012-07-25

Family

ID=43841971

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2010105885427A Expired - Fee Related CN102011672B (en) 2010-12-08 2010-12-08 Mixed flow turbine employing novel guide blade and runner blade profile

Country Status (1)

Country Link
CN (1) CN102011672B (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103114954A (en) * 2012-12-07 2013-05-22 哈尔滨电机厂有限责任公司 Method for improving pressure pulsation of mixed-flow type pump turbine
CN103206331A (en) * 2013-02-07 2013-07-17 河海大学 Low-head efficient shaft-extension tubular pump turbine and blades thereof
CN103696895A (en) * 2013-12-19 2014-04-02 广东电网公司电力科学研究院 Mixed-flow type water pump turbine
CN104234910A (en) * 2013-06-05 2014-12-24 阿尔斯通再生能源技术公司 Method of refurbishing an energy conversion facility and refurbished energy conversion facility
CN104912850A (en) * 2015-05-21 2015-09-16 合肥通用机械研究院 Radial guide vane structure with streamline structure
CN106640481A (en) * 2016-12-07 2017-05-10 中国水利水电科学研究院 Method for reducing harm of draft tube eccentric vortex strip of Francis hydraulic turbine
EP2923075B1 (en) 2012-01-03 2019-02-20 Rainpower Technology AS A francis turbine runner
CN109763928A (en) * 2017-11-09 2019-05-17 株式会社东芝 Guide vane and fluid machinery
CN110439722A (en) * 2019-07-05 2019-11-12 清华大学 A kind of wear-resistant Francis turbine adapting to high water head, high revolving speed and high sediment concentration
CN111720384A (en) * 2019-03-22 2020-09-29 通用电气再生能源技术公司 Method for detecting fatigue damage of hydraulic unit and hydraulic unit thereof
CN114941602A (en) * 2022-07-05 2022-08-26 西安理工大学 Mixed-flow water turbine capable of controlling generation of blade vortex

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB216113A (en) * 1923-05-17 1924-10-09 Escher Wyss Maschf Ag Improvements in or relating to guide and moving vanes for engines and machines with rotors, particularly hydraulic, steam and gas turbines
WO2003081027A1 (en) * 2002-03-27 2003-10-02 Voith Siemens Hydro Power Generation Gmbh & Co. Kg Support and guide blades for a francis turbine
CN101344059A (en) * 2008-08-28 2009-01-14 哈尔滨电机厂有限责任公司 Reverse S type runner of mixed-flow turbine
CN101560937A (en) * 2009-05-27 2009-10-21 南京星飞冷却设备有限公司 Direct connection low-speed small-scale mixed-flow turbine seating ring applied in hydrodynamic energy-saving cooling tower
CN101560940A (en) * 2009-05-27 2009-10-21 南京星飞冷却设备有限公司 Direct connection low-speed small-scale mixed-flow turbine applied in hydrodynamic energy-saving cooling tower
CN201339532Y (en) * 2009-01-22 2009-11-04 河海大学 Small-sized francis turbine generator
DE102009014004A1 (en) * 2009-03-19 2010-09-23 Bosch Mahle Turbo Systems Gmbh & Co. Kg Guide vane for turbocharger for internal combustion engine of motor vehicle, has leading edge, outlet edge and profile outer contour that is guided from leading edge to outlet edge

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB216113A (en) * 1923-05-17 1924-10-09 Escher Wyss Maschf Ag Improvements in or relating to guide and moving vanes for engines and machines with rotors, particularly hydraulic, steam and gas turbines
WO2003081027A1 (en) * 2002-03-27 2003-10-02 Voith Siemens Hydro Power Generation Gmbh & Co. Kg Support and guide blades for a francis turbine
CN101344059A (en) * 2008-08-28 2009-01-14 哈尔滨电机厂有限责任公司 Reverse S type runner of mixed-flow turbine
CN201339532Y (en) * 2009-01-22 2009-11-04 河海大学 Small-sized francis turbine generator
DE102009014004A1 (en) * 2009-03-19 2010-09-23 Bosch Mahle Turbo Systems Gmbh & Co. Kg Guide vane for turbocharger for internal combustion engine of motor vehicle, has leading edge, outlet edge and profile outer contour that is guided from leading edge to outlet edge
CN101560937A (en) * 2009-05-27 2009-10-21 南京星飞冷却设备有限公司 Direct connection low-speed small-scale mixed-flow turbine seating ring applied in hydrodynamic energy-saving cooling tower
CN101560940A (en) * 2009-05-27 2009-10-21 南京星飞冷却设备有限公司 Direct connection low-speed small-scale mixed-flow turbine applied in hydrodynamic energy-saving cooling tower

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2923075B1 (en) 2012-01-03 2019-02-20 Rainpower Technology AS A francis turbine runner
CN103114954A (en) * 2012-12-07 2013-05-22 哈尔滨电机厂有限责任公司 Method for improving pressure pulsation of mixed-flow type pump turbine
CN103114954B (en) * 2012-12-07 2016-01-20 哈尔滨电机厂有限责任公司 Improve the method for pressure pulsation of mixed-flow type pump turbine
CN103206331A (en) * 2013-02-07 2013-07-17 河海大学 Low-head efficient shaft-extension tubular pump turbine and blades thereof
CN103206331B (en) * 2013-02-07 2016-03-23 河海大学 A kind of low water head axle extend through flow type pump turbine and blade thereof
US10190565B2 (en) 2013-06-05 2019-01-29 Ge Renewable Technologies Method of refurbishing an energy conversion facility and refurbished energy conversion facility
CN104234910A (en) * 2013-06-05 2014-12-24 阿尔斯通再生能源技术公司 Method of refurbishing an energy conversion facility and refurbished energy conversion facility
CN104234910B (en) * 2013-06-05 2017-04-12 阿尔斯通再生能源技术公司 Method of refurbishing an energy conversion facility and refurbished energy conversion facility
CN103696895A (en) * 2013-12-19 2014-04-02 广东电网公司电力科学研究院 Mixed-flow type water pump turbine
CN104912850A (en) * 2015-05-21 2015-09-16 合肥通用机械研究院 Radial guide vane structure with streamline structure
CN104912850B (en) * 2015-05-21 2017-03-01 合肥通用机械研究院 Radial guide vane structure with streamline structure
CN106640481A (en) * 2016-12-07 2017-05-10 中国水利水电科学研究院 Method for reducing harm of draft tube eccentric vortex strip of Francis hydraulic turbine
CN106640481B (en) * 2016-12-07 2019-07-19 中国水利水电科学研究院 A method of mitigating the harm of Draft Tube of Francis Turbine eccentric vortex band
CN109763928A (en) * 2017-11-09 2019-05-17 株式会社东芝 Guide vane and fluid machinery
CN111720384A (en) * 2019-03-22 2020-09-29 通用电气再生能源技术公司 Method for detecting fatigue damage of hydraulic unit and hydraulic unit thereof
CN110439722A (en) * 2019-07-05 2019-11-12 清华大学 A kind of wear-resistant Francis turbine adapting to high water head, high revolving speed and high sediment concentration
CN110439722B (en) * 2019-07-05 2020-06-23 清华大学 Wear-resistant mixed-flow water turbine suitable for high water head, high rotating speed and high sand content
CN114941602A (en) * 2022-07-05 2022-08-26 西安理工大学 Mixed-flow water turbine capable of controlling generation of blade vortex
CN114941602B (en) * 2022-07-05 2024-08-06 西安理工大学 Mixed-flow water turbine capable of controlling She Daoguo to generate

Also Published As

Publication number Publication date
CN102011672B (en) 2012-07-25

Similar Documents

Publication Publication Date Title
CN102011672B (en) Mixed flow turbine employing novel guide blade and runner blade profile
CN102182622B (en) Six-operating-condition bidirectional tide power generation water turbine
CN1702317A (en) Mixed flow water turbine with an eddy suppressor
CN102720622B (en) Vortex generator for turbine draft tube
CN202348525U (en) Axial-flow rotary propeller type water turbine
CN101555859A (en) Francis turbine runner with ultra-low specific rotating speed specially used for driving cooling tower fan
CN113915045B (en) Mixed-flow water turbine draft tube with inclined bent cone
CN111852721B (en) High-head impact type water turbine injection mechanism
CN202417783U (en) Mixed-flow water turbine adopting novel guide vane and runner blade profiles
CN103912434A (en) Small-hydropower axial flow turbine device
CN100427753C (en) Mixed flow type water turbin having H-type flow path rotary wheel
CN202140236U (en) Six-working-condition bidirectional tidal power generation hydraulic turbine
CN202194767U (en) Novel rotating wheel of axial-flow hydraulic turbine
CN111535974A (en) Low-water-head large-flow mixed-flow water turbine with double-inlet volute
Wang et al. Effect of baffles in between stages on performance and flow characteristics of a two-stage split case centrifugal pump
CN202991335U (en) Six working condition both-way tidal power generation water turbine
CN203214227U (en) Small mixed-flow water turbine for water-cooling tower system
CN202756162U (en) Mixed-flow water turbine adopting novel guide vane and runner blade molded lines
CN107829861B (en) A kind of impulse turbine based on pyriform line airfoil fan
CN105863930B (en) A kind of small all-in-one turbine-generator units
CN108915938B (en) Power station operation method for reducing vibration of pumped storage power station set and factory building
CN110439722B (en) Wear-resistant mixed-flow water turbine suitable for high water head, high rotating speed and high sand content
CN110296032B (en) Bidirectional full-through-flow turbine
CN210105928U (en) Novel impingement cooling turbulence structure
CN204099106U (en) A kind of impeller

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120725

Termination date: 20161208

CF01 Termination of patent right due to non-payment of annual fee