CN101915196A - Double-runner ultra-low specific speed axial flow hydraulic turbine for driving cooling tower fan - Google Patents
Double-runner ultra-low specific speed axial flow hydraulic turbine for driving cooling tower fan Download PDFInfo
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- CN101915196A CN101915196A CN2010101807787A CN201010180778A CN101915196A CN 101915196 A CN101915196 A CN 101915196A CN 2010101807787 A CN2010101807787 A CN 2010101807787A CN 201010180778 A CN201010180778 A CN 201010180778A CN 101915196 A CN101915196 A CN 101915196A
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- 238000006243 chemical reaction Methods 0.000 claims description 7
- 238000007514 turning Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
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- 238000004134 energy conservation Methods 0.000 description 2
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- 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
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Abstract
The invention discloses a double-runner ultra-low specific speed axial flow hydraulic turbine for driving a cooling tower fan, which can effectively solve the problems of high specific speed, large size and low efficiency of a hydraulic turbine. The technical scheme for solving the problem is as follows: the same principal axis of the hydraulic turbine is provided with a first runner and a second runner which rotate at the same direction and are in ultra-low specific speed axial flow type; two ultra-low specific speed runners are in the relay type; flow enters a radial flow guide vane from a flume; after changing the circulation of the flow, a guide vane rotates at 90 degrees; the first runner converts 1/2 of total hydroenergy, and the second runner converts residual 1/2 of hydroenergy; the vane inlet angle beta 1 of the first runner is equal to 140-160 degrees, an outlet angel beta 2 is equal to 90 degrees, and the angle difference of the inlet and the outlet of the vane is equal to 50-70 degrees; the vane inlet angle beta 3 of the second runner is equal to 90 degrees, the outlet angle beta 4 is equal to 20-40 degrees, and the angle difference of the inlet and the outlet of the vane is equal to 50-70 degrees; and the total angle difference is equal to 100-140 degrees. The invention has strong overcurrent capability and small size, the speed is matched with that of the cooling tower fan, and efficiency is high.
Description
One, technical field
The present invention relates to water turbine, particularly a kind of blower fan of cooling tower drives uses double-runner ultra-low specific speed axial flow hydraulic turbine.
Two, background technique
In the reducing energy consumption of common used in industry cooling tower, the pressure margin of utilizing the cooling tower water system generally to leave drives blower fan of cooling tower with a kind of water turbine, can substitute former blower fan drive motor, reaches the energy-conservation purpose of safeguarding with minimizing.But under the specific condition of cooling tower water streaming system and blower fan, the water turbine that conventional power generation usage is used is all improper, needs the new water turbine of exploitation, just can reach the requirement that is consistent with cooling tower current condition.
When water turbine and blower fan direct connection, pressure, flow and three water turbine specific speeds that characteristic parameter calculated of rotation speed of fan according to the cooling-tower circulating water system, must be ultra-low specific speed or ultra-low specific speed, and water turbine need coexist and work in the pressure water streaming system of connecting with heat exchanger, water-dispensing device one.Though impulse turbine meets the characteristics of low-specific-speed, the runner of this class water turbine need be not suitable for using in the pressure water streaming system of series connection in passive state work; Ultra-low specific speed mixed-flow type turbine can make rotational speed of water turbine and blower fan coupling, but the ultra-low specific speed mixed-flow type turbine planar dimension is bigger, influences the passage of cooling tower air-flow; Conventional axial flow hydraulic turbine conveyance capacity is strong, can reduce the water turbine planar dimension, but its specific speed is too high, when using with associated mode with blower fan on cooling tower, can make water turbine depart from optimum operating condition far away.Drive blower fan of cooling tower with conventional axial flow hydraulic turbine direct connection, the result, the efficient of water turbine is very low, how to solve water turbine specific speed height, and size is big, and inefficient problem is expected by many.
Three, summary of the invention
At above-mentioned situation, for overcoming the prior art defective, the present invention's purpose just provides a kind of blower fan of cooling tower driving and uses double-runner ultra-low specific speed axial flow hydraulic turbine, can effectively solve water turbine specific speed height, and size is big, inefficient problem.
The technological scheme that the present invention solves is, develop a kind of ultra-low specific speed axial flow hydraulic turbine of brand-new type, scroll casing type flume, water distributor, runner envelope, main shaft, bearing and main shaft seal that this water turbine has conventional vertical shaft axial flow hydraulic turbine to be had, two runners of water turbine are installed on the same main shaft, main shaft stretches out from water turbine top through runner envelope, top cover, main shaft seal and bearing, directly is connected with blower fan of cooling tower.
Key technology of the present invention is, first runner and second runner of homodromal low-specific-speed axial flow are installed on the same main shaft of water turbine, two low-specific-speed runners are the relay mode and work, thereby realize the characteristic of water turbine ultra-low specific speed, current enter radially guide vane by flume, after stator changes the circular rector of current, do 90 ° of turnings, do not enter runner envelope there to be bump import mode, at first enter the acting of first runner, finish the conversion of 1/2 total water energy, enter second runner then, finish the conversion of residue 1/2 water energy, the inlet blade angle β of said first runner
1=140 °～160 °, exit angle β
2=90 °, the differential seat angle between the blade inlet/outlet is 50 °～70 °; The inlet blade angle β of said second runner
3=90 °, exit angle β
4=20 °～40 °, blade inlet/outlet differential seat angle is 50 °～70 °, and the first runner import is 100 °～140 ° to the total angle difference of blade between second outlet of rotary wheel.
The present invention utilizes the advantage that the axial flow hydraulic turbine conveyance capacity is strong, size is little, and overcome the too high shortcoming of its specific speed technically, it is a kind of low-specific-speed double runner axial flow hydraulic turbine that innovative research goes out, its rotating speed and blower fan of cooling tower coupling are good, and compact structure, size are less, the efficient height.
Four, description of drawings
Fig. 1 is a structural front view of the present invention.
Fig. 2 is a spiral case runner envelope horizontal sectional view of the present invention.
Fig. 3 is first runner of the present invention, the second runner streamflow regime figure.
Five, embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated.
Provide by Fig. 1-Fig. 3, hydraulic turbine structure of the present invention comprises the flume 1 of most peripheral, water distributor 2 in the flume, water-turbine top cover 3 above the water distributor, the bottom of top cover 3 is equipped with first runner 5 and second runner 6 on hydraulic turbine main shaft 7, the periphery of runner is a runner envelope 4, be draft tube 8 bottom, main shaft seal 9 is housed on the main shaft 7, bearing 10, bearing has bearing support 13 outward, on sealing cover 12 is arranged, blower fan 11 is equipped with in the upper end portion of main shaft, current at first enter scroll casing shape flume 1, the water distributor of forming through stator 2 again, after enter runner envelope 4 through being 90 ° of forniciform runners, respectively by first runner 5 and second runner 6, after draft tube 8 is discharged the inlet blade angle β of said first runner 5
1=140 °～160 °, exit angle β
2=90 °, the differential seat angle between the first runner bucket inlet/outlet is 50 °～70 °, the inlet blade angle β of said second runner 6
3=90 °, exit angle β
4=20 °～40 °, the second runner bucket inlet/outlet differential seat angle is 50 °～70 °, and the first runner import is 100 °～140 ° to the total angle difference of blade between second outlet of rotary wheel.
In order to reach the purpose of ultra-low specific speed, the number of blade of the blade of said first runner and second runner is 8～16, more than the number of blade of conventional axial flow runner; The hub ratio d of said first runner and second runner
h/ D
1=0.6～0.8; Said two runners are the relay mode works, and total utilized head of two runners is 2 times of single runner, so double runner relay work can make the specific speed of whole water turbine lower; In the specific implementation, the inlet blade angle β of said first runner
1Be a kind of in 140 °, 150 °, 160 °, the differential seat angle between the blade inlet/outlet of first runner is a kind of in 50 °, 60 °, 70 °, the blade outlet angle β of said second runner
4Be a kind of in 20 °, 30 °, 40 °, the blade inlet/outlet differential seat angle of second runner is a kind of in 50 °, 60 °, 70 °, and the first runner import is a kind of in 100 °, 110 °, 120 °, 130 °, 140 ° to the total angle difference of blade between second outlet of rotary wheel; The hub ratio d of said first runner and second runner
h/ D
1Be a kind of in 0.6,0.7,0.8.
Working principle of the present invention is:
1, adopt the coaxial double runner relay-type work of rotating in the same way, this is one of key of innovating of the present invention, and by shown in Figure 1, key of the present invention is the core component-rotary wheel of water turbine that changes its transformation of energy on the basis of conventional axial flow hydraulic turbine.Two homodromal low-specific-speed axial flow first runners of device and second runner on same main shaft.The flume of conventional axial flow hydraulic turbine, water distributor, runner envelope and the main shaft and the seal style of assisting are constant substantially, and flume 1 is the circle cross section metal spiral case.Radially water distributor 2 is equipped with in the flume the inside, pressure flow at first enters flume through pressure piping, enter water distributor then, current are through having increased the circular rector of current behind the water distributor, evenly enter first runner after turning to 90 ° vertically, current are finished 1/2 transformation of energy in first runner, the outlet current of first runner do not enter second runner there to be the bump inlet condition, finishing remaining 1/2 water in second runner can change, send having the current that remain 1/2 energy into second runner 4, second runner is not accepted current there to be the bump inlet condition equally, and the current after will doing work with the normal direction discharge state enter downstream line, can become rotating mechanical energy to water, drive blower fan of cooling tower through the runner main shaft and rotate.Unique distinction of the present invention is that two runners are the collaborative work of relay mode, and the emphasis of first runner is the good condition for import that satisfies water turbine, guarantees that current do not enter runner there to be the bump inlet condition, make runner import hydraulic loss minimum; The emphasis of second runner is the good exit condition that satisfies water turbine, and the outlet current keep the normal direction outlet, uses saliva power loss minimum.Two runners all adopt big hub ratio, multiple-blade, and the blade of two runners all adopts the aerodynamic force aerofoil profile of macrobending degree to make section, can make two water turbine that higher energy conversion efficiency is all arranged like this, all are low-specific-speeds simultaneously.The design of the turnover of two runner buckets, bicker degree has guaranteed that two runners are level and smooth relay mode and work.Two low-specific-speed runner relay-type combinations can make double-rotary-wheel water turbine have lower specific speed, satisfy the requirement of water turbine for cooling tower ultra-low specific speed, making it has good matching with rotation speed of fan under the residual pressure and flow condition of cooling tower water system.Compare with several water turbine that are used for cooling tower now, efficient height of the present invention, size is little, and vibration is light, is more suitable for installing on industrial cooling tower, is mainly used in to substitute former blower fan drive motor, to reach the purpose that energy-conservation, safety and minimizing are safeguarded.Also can be applicable to small hydropower station.
2, adopt macrobending degree aerodynamic force aerofoil profile to make blade section, this is the essential condition that runner has the low-specific-speed characteristic.Be the core that the present invention innovates, as shown in Figure 3, since first runner, its inlet angle β
1=140 °～160 °, exit angle β
2=90 °, the differential seat angle between the blade inlet/outlet is 50 °～70 °.Said second runner, its inlet angle β
3=90 °, exit angle β
4=20 °～40 °, have very big tortuosity equally, blade inlet/outlet differential seat angle also is 50 °～70 °.Total angle difference from the first runner import to blade second outlet of rotary wheel is 100 °～140 °, and this is another key that realizes the runner ultra-low specific speed.Simultaneously, the smooth transition of current effectively realizes the abundant conversion of flow energy and the high efficiency of water turbine between the normal direction outlet of the import of the nothing of first runner bump, second runner and first, second runner.
3, the big hub ratio of multiple-blade.The blade number average of first, second runner is between 8～16, far more than the number of blade of conventional axial flow runner.And the hub ratio d of first, second runner
h/ D
1=0.6～0.8, also much larger than conventional axial flow runner, this is the 3rd key measure that realizes the ultra-low specific speed axial flow runner.
By above three technology measure, make axial flow hydraulic turbine reach ultra-low specific speed, can be complementary with the flow condition of cooling tower, to realize the direct connection of water turbine and blower fan of cooling tower.
Positive contribution of the present invention is:
1, by adopting double runner relay-type working method, make the specific speed of the hydraulic turbine reduce by 1/2, realize the ultra-low specific speed of axial flow hydraulic turbine, make axial flow hydraulic turbine can be fit to the flow condition of cooling tower, good with the rotation speed of fan coupling, and performance axial flow hydraulic turbine conveyance capacity is strong, the advantage that size is little.
2, double runner all adopts big hub ratio, multiple-blade, and all adopts the air force aerofoil profile of macrobending degree to make blade section, has both guaranteed the high efficiency of runner power conversion, has realized again the low-specific-speed of runner. Make axial flow hydraulic turbine be fit to the specific (special) requirements of current and the blower fan of cooling tower.
The invention has the beneficial effects as follows and use the technology of the present invention that traditional cooling tower is undergone technological transformation, substitute former drive motor and transmission mechanism, can reach energy-saving and environmental protection and reduced-maintenance purpose. Also can form series of products, supporting with the novel energy-saving cooling tower, make the industrial cooling tower system more safe and efficient.
Compare with double click type, the mixed-flow cooling tower dedicated water turbine of present use, double runner axial flow hydraulic turbine of the present invention has obvious superiority from operation principle, structure aspects, handling ease, and price is low, efficient height, small size, stable have huge economic and social benefit.
Claims (6)
1. a blower fan of cooling tower drives and uses double-runner ultra-low specific speed axial flow hydraulic turbine, develop a kind of ultra-low specific speed axial flow hydraulic turbine of brand-new type, the scroll casing type flume that this water turbine has conventional vertical shaft axial flow hydraulic turbine to be had, water distributor, runner envelope, main shaft, bearing and main shaft seal, main shaft is through runner envelope, top cover, main shaft seal and bearing stretch out from water turbine top, directly be connected with blower fan of cooling tower, it is characterized in that, first runner and second runner of homodromal low-specific-speed axial flow are installed on the same main shaft of water turbine, two low-specific-speed runners are relay-type, realize the water turbine ultra-low specific speed, current enter radially guide vane by flume, after stator changes the circular rector of current, do 90 ° of turnings, do not enter runner envelope, at first enter the acting of first runner there to be bump import mode, finish the conversion of 1/2 total water energy, enter second runner then, finish the conversion of residue 1/2 water energy, the inlet blade angle β of said first runner
1=140 °～160 °, exit angle β
2=90 °, the differential seat angle between the blade inlet/outlet is 50 °～70 °; The inlet blade angle β of said second runner
3=90 °, exit angle β
4=20 °～40 °, blade inlet/outlet differential seat angle is 50 °～70 °, and the first runner import is 100 °～140 ° to the total angle difference of blade between second outlet of rotary wheel.
2. blower fan of cooling tower according to claim 1 drives uses double-runner ultra-low specific speed axial flow hydraulic turbine, it is characterized in that, the flume (1) that comprises most peripheral, water distributor (2) in the flume, water-turbine top cover above the water distributor (3), the bottom of top cover (3) is equipped with first runner (5) and second runner (6) on hydraulic turbine main shaft (7), the periphery of runner is runner envelope (4), be draft tube (8) bottom, main shaft seal (9) is housed on the main shaft (7), bearing (10), bearing has bearing support (13) outward, on sealing cover (12) is arranged, blower fan (11) is equipped with in the upper end portion of main shaft, current at first enter scroll casing shape flume (1), pass through the water distributor (2) that stator is formed again, after enter runner envelope (4) through being 90 ° of forniciform runners, respectively by first runner (5) and second runner (6), after draft tube (8) is discharged the inlet blade angle β of said first runner (5)
1=140 °～160 °, exit angle β
2=90 °, the differential seat angle between the first runner bucket inlet/outlet is 50 °～70 °, the inlet blade angle β of said second runner (6)
3=90 °, exit angle β
4=20 °～40 °, the second runner bucket inlet/outlet differential seat angle is 50 °～70 °, and the first runner import is 100 °～140 ° to the total angle difference of blade between second outlet of rotary wheel.
3. blower fan of cooling tower according to claim 1 and 2 drives and uses double-runner ultra-low specific speed axial flow hydraulic turbine, it is characterized in that the number of blade of the blade of said first runner and second runner is 8～16.
4. blower fan of cooling tower according to claim 1 and 2 drives and uses double-runner ultra-low specific speed axial flow hydraulic turbine, it is characterized in that the hub ratio d of said first runner and second runner
h/ D
1=0.6～0.8.
5. blower fan of cooling tower according to claim 1 and 2 drives and uses double-runner ultra-low specific speed axial flow hydraulic turbine, it is characterized in that the inlet blade angle β of said first runner
1Be a kind of in 140 °, 150 °, 160 °, the differential seat angle between the blade inlet/outlet of first runner is a kind of in 50 °, 60 °, 70 °, the blade outlet angle β of said second runner
4Be a kind of in 20 °, 30 °, 40 °, the blade inlet/outlet differential seat angle of second runner is a kind of in 50 °, 60 °, 70 °, and the first runner import is a kind of in 100 °, 110 °, 120 °, 130 °, 140 ° to the total angle difference of blade between second outlet of rotary wheel.
6. blower fan of cooling tower according to claim 4 drives and uses double-runner ultra-low specific speed axial flow hydraulic turbine, it is characterized in that the hub ratio d of said first runner and second runner
h/ D
1Be a kind of in 0.6,0.7,0.8.
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| CN2010101807787A CN101915196B (en) | 2010-05-24 | 2010-05-24 | Double-runner ultra-low specific speed axial flow hydraulic turbine for driving cooling tower fan |
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|---|---|---|---|
| CN2010101807787A CN101915196B (en) | 2010-05-24 | 2010-05-24 | Double-runner ultra-low specific speed axial flow hydraulic turbine for driving cooling tower fan |
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| CN101915196B CN101915196B (en) | 2011-11-16 |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102140992A (en) * | 2011-01-19 | 2011-08-03 | 南京大洋冷却塔股份有限公司 | Multi-stage energy-saving hydraulic driving device for cooling tower |
| CN102536590A (en) * | 2012-01-18 | 2012-07-04 | 河海大学 | Two-stage through-flow turbine with ultralow specific speed |
| CN103104556A (en) * | 2013-02-01 | 2013-05-15 | 夏云生 | Water-raising engine free of energy consumption |
| CN104847415A (en) * | 2015-01-05 | 2015-08-19 | 兰州理工大学 | Axial-flow type hydraulic turbine device |
| CN106677960A (en) * | 2016-12-29 | 2017-05-17 | 河海大学 | Twin-runner water turbine applied to cooling tower and provided with circular-truncated-cone spiral blades |
| CN106677959A (en) * | 2016-12-29 | 2017-05-17 | 河海大学 | Twin-runner water turbine provided with Archimedes helical blades and used for cooling tower |
| CN106677958A (en) * | 2016-12-29 | 2017-05-17 | 河海大学 | Double-turning-wheel water turbine with logarithmic spiral blades and for cooling tower |
| CN108798969A (en) * | 2018-07-28 | 2018-11-13 | 华北水利水电大学 | A kind of hydraulic turbine runner with flow channel type guide blade based on hydraulic turbine pattern |
| CN109653928A (en) * | 2018-12-07 | 2019-04-19 | 西安诺普电气工程技术有限公司 | The energy-efficient hydraulic turbine and its implementation method applied to cooling tower |
| CN110735761A (en) * | 2019-10-16 | 2020-01-31 | 华电电力科学研究院有限公司 | axial flow type water turbine water distribution device and water turbine energy-saving design method |
| CN111720252A (en) * | 2020-05-11 | 2020-09-29 | 华北水利水电大学 | A Two-Stage Water Turbine Combining Francis-Flow and Axial-Flow Runners |
| WO2021077222A1 (en) * | 2019-10-25 | 2021-04-29 | Composite Hydraulic Turbine Ottawa Inc. | Self-regulating water turbine runner, water turbine equipped with sub-runner located upstream of the main runner and water turbine comprising the same |
| CN114109702A (en) * | 2021-11-02 | 2022-03-01 | 湖北省汉楚澳龙消防设备有限公司 | Water turbine for fire fighting |
| CN114687909A (en) * | 2022-04-08 | 2022-07-01 | 河南新飞纪元节能科技股份有限公司 | An ultra-small unit flow radial straight-blade turbine |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102140992A (en) * | 2011-01-19 | 2011-08-03 | 南京大洋冷却塔股份有限公司 | Multi-stage energy-saving hydraulic driving device for cooling tower |
| CN102536590A (en) * | 2012-01-18 | 2012-07-04 | 河海大学 | Two-stage through-flow turbine with ultralow specific speed |
| CN102536590B (en) * | 2012-01-18 | 2013-11-27 | 河海大学 | Two-stage ultra-low specific speed tubular turbine |
| CN103104556A (en) * | 2013-02-01 | 2013-05-15 | 夏云生 | Water-raising engine free of energy consumption |
| CN104847415B (en) * | 2015-01-05 | 2017-07-14 | 兰州理工大学 | A kind of axial-flow type hydraulic turbine installation |
| CN104847415A (en) * | 2015-01-05 | 2015-08-19 | 兰州理工大学 | Axial-flow type hydraulic turbine device |
| CN106677959A (en) * | 2016-12-29 | 2017-05-17 | 河海大学 | Twin-runner water turbine provided with Archimedes helical blades and used for cooling tower |
| CN106677958A (en) * | 2016-12-29 | 2017-05-17 | 河海大学 | Double-turning-wheel water turbine with logarithmic spiral blades and for cooling tower |
| CN106677960A (en) * | 2016-12-29 | 2017-05-17 | 河海大学 | Twin-runner water turbine applied to cooling tower and provided with circular-truncated-cone spiral blades |
| CN108798969A (en) * | 2018-07-28 | 2018-11-13 | 华北水利水电大学 | A kind of hydraulic turbine runner with flow channel type guide blade based on hydraulic turbine pattern |
| CN108798969B (en) * | 2018-07-28 | 2023-11-24 | 华北水利水电大学 | Hydraulic turbine runner with runner type guide vane based on water turbine mode |
| CN109653928B (en) * | 2018-12-07 | 2023-10-27 | 西安诺普电气工程技术有限公司 | Efficient energy-saving water turbine applied to cooling tower and implementation method thereof |
| CN109653928A (en) * | 2018-12-07 | 2019-04-19 | 西安诺普电气工程技术有限公司 | The energy-efficient hydraulic turbine and its implementation method applied to cooling tower |
| CN110735761A (en) * | 2019-10-16 | 2020-01-31 | 华电电力科学研究院有限公司 | axial flow type water turbine water distribution device and water turbine energy-saving design method |
| WO2021077222A1 (en) * | 2019-10-25 | 2021-04-29 | Composite Hydraulic Turbine Ottawa Inc. | Self-regulating water turbine runner, water turbine equipped with sub-runner located upstream of the main runner and water turbine comprising the same |
| US11879423B2 (en) | 2019-10-25 | 2024-01-23 | Composite Hydraulic Turbine Ottawa Inc. | Self-regulating water turbine runner, water turbine equipped with sub-runner located upstream of the main runner and water turbine comprising the same |
| CN111720252A (en) * | 2020-05-11 | 2020-09-29 | 华北水利水电大学 | A Two-Stage Water Turbine Combining Francis-Flow and Axial-Flow Runners |
| CN114109702A (en) * | 2021-11-02 | 2022-03-01 | 湖北省汉楚澳龙消防设备有限公司 | Water turbine for fire fighting |
| CN114687909A (en) * | 2022-04-08 | 2022-07-01 | 河南新飞纪元节能科技股份有限公司 | An ultra-small unit flow radial straight-blade turbine |
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| CN101915196B (en) | 2011-11-16 |
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