CN103982362A - Hydrodynamic direct-drive radial-flow water turbine of cooling tower - Google Patents
Hydrodynamic direct-drive radial-flow water turbine of cooling tower Download PDFInfo
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- CN103982362A CN103982362A CN201310487783.6A CN201310487783A CN103982362A CN 103982362 A CN103982362 A CN 103982362A CN 201310487783 A CN201310487783 A CN 201310487783A CN 103982362 A CN103982362 A CN 103982362A
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- water turbine
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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
- 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
Abstract
The invention provides a hydrodynamic direct-drive radial-flow water turbine of a cooling tower, and relates to the technical field of a water turbine, in particular to the hydrodynamic direct-drive radial-flow water turbine of the cooling tower. The hydrodynamic direct-drive radial-flow water turbine comprises a volute, seat rings, a rotating wheel and a right-cone-shaped tail water pipe, wherein the seat rings are mounted in the volute and are internally provided with guide blades, a water outlet opening of the volute, a water inlet opening of the guide blades, a water outlet opening of the guide blades, a water inlet opening of the rotating wheel, a water outlet opening of the rotating wheel and a water inlet opening of the tail water pipe are communicated in sequence; the lower end of a shaft is downwardly connected with a bearing block, the rotating wheel and a runner cone in sequence; the upper end of the shaft is connected with a cooling fan; the water turbine serves as a low specific rotation speed water turbine of which the specific rotation speed is smaller than 60m.kW. By applying the hydrodynamic direct-drive radial-flow water turbine, the purposes of simple structure, convenience in processing, low manufacturing cost, great output, high efficiency, applicable large-scale popularization and energy saving are realized.
Description
Technical field
The present invention relates to the technical field of water turbine, relate in particular to a kind of hydrodynamic(al) cooling tower and directly drive radial water turbine.
Background technique
Water turbine is can convert water a kind of hydraulic prime mover of rotating mechanical energy to.Due to industrial cooling tower circulation loop hydraulic pressure, to need safe clearance and Model of pump to select too conservative, and the water in cooling tower circulating water system can often have more than needed, just becomes dump energy.Water turbine for cooling tower converts dump energy the mechanical energy that pivots to, thereby drives blower fan rotation, has replaced the driving arrangement motor of blower fan.
Due to the restriction of cooling tower working environment, hydraulic turbine of cooling tower is compared with water turbine has its particularity, therefore the research of this kind of water turbine is had very important significance.In order to improve the working efficiency of water turbine, wherein important problem is to solve turbine size will adapt to the limited installing space of cooling tower, and with the problem such as power of fan, rotating speed mate.
Summary of the invention
The object of the invention is to provide a kind of simple in structure, easy to process, low cost of manufacture, and the large efficiency of exerting oneself is high, is suitable for the hydraulic turbine of cooling tower of large-scale promotion, and energy-efficient hydrodynamic(al) cooling tower directly drives radial-flow type water wheels.
In order to solve the problems of the technologies described above, the present invention is achieved by the following technical solutions:
A kind of hydrodynamic(al) cooling tower of the present invention directly drives radial water turbine, it comprises spiral case, be arranged on seat ring, runner and conical draft tube that internal placement on spiral case has stator, spiral case water outlet and stator water intake, stator water outlet and runner water intake, runner water outlet and draft tube 8 water intakes are connected in turn, axle lower end is connected with bearing support, runner and draft cone downwards successively, axle upper end connects cooling blower, and described water turbine is the low-specific-speed water turbine that specific speed is less than 60m.kW.
The unit speed of runner of the present invention
for constant, between 37～57, n is blower fan rated speed, and H is water turbine intake-outlet pressure difference, and D1 is runner water intake diameter; It is that h1 and D1 ratio are 0.095～0.105 that described runner channel portion size closes, h2 and D1 ratio are 0.218～0.228, the ratio of D2 and D1 is 0.501～0.511, described runner comprises crown, lower ring, is clamped in 13 bending tablet blades between crown and lower ring, described crown is curved surface, its bus is three sections of curvature circular arcs that do not wait, and the ratio of radius of curvature R 1, R2, R3 and D1 is respectively 1.104～1.108,0.225～0.229,0.232～0.236; Described lower ring is curved surface, its bus is two sections of curvature circular arcs that do not wait, and the ratio of radius of curvature R 4, R5 and D1 is respectively 0.385～0.389,0.194～0.198, and described curved vane are a spoonful shape, tortuosity is by blade import laying angle β 1 and outlet laying angle β 2 decisions, and β 1 exists with the difference of β 2
between, described import laying angle β 1 is 106 °～110 °, and outlet laying angle β 2 is between-42 °～-49 °, and curved vane thickness equates;
The water intake diameter that water intake is high, D1 is runner, the h2 that wherein h1 is runner is the water outlet diameter that runner channel is high, D2 is runner.
Compared with prior art, the invention has the beneficial effects as follows:
A kind of hydrodynamic(al) cooling tower of the present invention directly drives radial water turbine, by rational design, mates, and only need to know the rated speed n of cooling blower, then determines according to Environmental Conditions
by the poor H of inlet and outlet pressure, can be drawn the value of the water intake diameter D1 of runner, according to the value optimization of the water intake diameter D1 of runner, determine that water turbine each several part optimum size can draw the water turbine that meets rated speed, exerts oneself and require again, the present invention is directed to the feature of hydraulic turbine of cooling tower, according to the relation of the water intake diameter D1 of runner and cooling blower rotating speed, provide a kind of quick approach of appropriate design water turbine.
A kind of hydrodynamic(al) cooling tower of the present invention directly drives the runner that radial water turbine adopts 13 long equal thickness curved vane, simple in structure, all very convenient to installing from manufacturing, water turbine overall dimensions is little, design power efficiency can remain on more than 87%, optimum hydraulic efficiency can reach 91%, fully reaches energy-efficient object.
Accompanying drawing explanation
Fig. 1 is overall structure front view of the present invention.
Fig. 2 is spiral case cross-section size figure of the present invention.
Fig. 3 is runner sectional view of the present invention.
Fig. 4 is seat ring sectional view of the present invention.
Fig. 5 is stator three-view diagram of the present invention.
Fig. 6 is draft cone schematic diagram of the present invention.
Fig. 7 is the plan view of Fig. 6.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail:
As Figure 1-4, a kind of hydrodynamic(al) cooling tower of the present invention directly drives radial water turbine, it comprises that it comprises spiral case 1, being arranged on spiral case internal placement has the seat ring up and down 3 of single-row circular symmetric stator 2, runner 7 and conical draft tube 8, spiral case 1 water outlet and stator 2 water intakes, stator 2 water outlets and runner 7 water intakes, runner 7 water outlets and draft tube 8 water intakes are connected in turn, axle 10 lower ends downwards successively with bearing support 9, runner 7 and draft cone 11 are connected, axle 10 upper ends connect cooling blower, described rotary wheel of water turbine is low-specific-speed runner, specific speed is less than 60m.kW, runner 7 unit speeds
for constant, its scope is between 37～57, and n is blower fan rated speed, and H is water turbine intake-outlet pressure difference, and D1 is the water intake diameter of runner 7.
Stator 2 is arranged between seat ring 3 through bearing pin or welding method, and bearing pin is vertical with water (flow) direction.Stator 2 plays support and water conservancy diversion, and number is 13～16, and the high b of stator is into the high h1 in water limit; Curved vane 6 are welded between crown 4 and lower ring 5; Draft cone 11 is fixed on running shaft by threaded connection mode, and runner 7 is played a supporting role.
After the rated speed n of blower fan determines with water turbine intake-outlet pressure difference H, just can unique definite runner water intake diameter D1, thus definite whole water turbine each several part size.Size relationship is as follows: as shown in Figure 1, Figure 3, and the unit speed of runner 7 of the present invention
for constant, between 37～57, n is blower fan rated speed, and H is water turbine intake-outlet pressure difference, and D1 is runner water intake diameter; Described runner 7 runner section size relationships are that h1 and D1 ratio are 0.095～0.105, h2 and D1 ratio are 0.215～0.225, the ratio of D2 and D1 is 0.505～0.515, described runner 7 comprises crown 4, lower ring 5, is clamped in 13 bending tablet blades 6 between crown 4 and lower ring 5, described crown 4 is curved surface, its bus is three sections of curvature circular arcs that do not wait, and the ratio of radius of curvature R 1, R2, R3 and D1 is respectively 1.104～1.108,0.225～0.229,0.232～0.236; Described lower ring 5 is curved surface, its bus is two sections of curvature circular arcs that do not wait, the ratio of radius of curvature R 4, R5 and D1 is respectively 0.385～0.389,0.194～0.198, described curved vane 6 are a spoonful shape, tortuosity is by blade import laying angle β 1 and outlet laying angle β 2 decisions, and the difference of β 1 and β 2 is between 148 °～159 °, and described import laying angle β 1 is 106 °～110 °, outlet laying angle β 2 is between-42 °～-49 °, and curved vane 6 thickness equate;
Wherein h1 is that the water intake diameter that water intake is high, D1 is runner 7, the h2 of runner 7 are the water outlet diameter that runner channel is high, D2 is runner 7.
As shown in Figure 4, seat ring 3 of the present invention comprises the upper seat ring being arranged in parallel, lower seat ring, upper seat ring, the outward edge of lower seat ring is half fillet, the fillet radius R6 of upper seat ring and D1 ratio are 0.015～0.019, the fillet radius R7 of lower seat ring and D1 ratio 0.009～0.013, the thickness h 4 of upper seat ring is 0.028～0.043 with the ratio of D1, the thickness h 6 of lower seat ring is 0.018～0.033 with the ratio of D1, the interior circular diameter L3 of seat ring 3 and D1 ratio are 1.037～1.047, the outside diameter L2 of upper seat ring and the ratio of D1 are 1.328～1.338, the outside diameter L4 of lower seat ring and the ratio of D1 are 1.314～1.324, in described seat ring 3, stator 2 quantity are 13～16, stator head upstream face is connected with back side is round and smooth, the high b of stator is the high h1 of water intake of runner 7, and stator adopts symmetrical stator, and in it, the ratio of circular diameter D3, outside diameter D4 and D1 is respectively 1.065～1.071,1.234～1.240, wherein D1 is the water intake diameter of runner 7.
As shown in Figure 1, the ratio of the high h3 of conical draft tube 8 of the present invention and runner water intake diameter D1 is 0.25～0.75, and diffusion angle is 15 °～30 °.
As shown in Figure 2, spiral case 1 of the present invention is elliptical spiral casing, the ratio of oval cross section major axis a and minor axis b, and the ratio of a ' and b ' is 1.10～1.35, and the side-to-side dimensions L1 of spiral case 1 and D1 ratio are 2.05～2.20, and wherein D1 is the water intake diameter of runner 7.
As shown in Figure 6, Figure 7, draft cone 11 of the present invention is right cone type, the high h7 of draft cone 11 and D1 ratio are 0.05～0.11, wide L6 and D1 ratio are 0.115～0.125, upper end round platform diameter R8 and D1 ratio are 0.125～0.135, lower end round platform diameter L5 and D1 ratio are 0.043～0.053, and wherein D1 is the water intake diameter of runner 7.
A kind of hydrodynamic(al) cooling tower of the present invention directly drives radial water turbine, during work, cooling water enters by spiral case 1 runner that stator 2 forms by intake pipe with certain pressure, flow, under the guiding of stator 2, with certain rotation circular rector, enter runner 7, and promote runner 7 and rotate, the pressure energy of current and kinetic energy pass to runner 7, make it have rotating mechanical energy and obtain output power, drive fan radiating.
Claims (7)
1. a hydrodynamic(al) cooling tower directly drives radial water turbine, it is characterized in that comprising spiral case (1), being arranged on the upper internal placement of spiral case (1) has the seat ring (3) of stator (2), runner (7) and conical draft tube (8), spiral case (1) water outlet and stator (2) water intake, stator (2) water outlet and runner (7) water intake, runner (7) water outlet and draft tube (8) water intake are connected in turn, axle (10) lower end downwards successively with bearing support (9), runner (7) and draft cone (11) connect, axle (10) upper end connects cooling blower, described water turbine is the low-specific-speed water turbine that specific speed is less than 60m.kW.
2. hydrodynamic(al) cooling tower according to claim 1 directly drives radial water turbine, it is characterized in that above-mentioned stator (2) is the single-row symmetrical stator that is circular layout.
3. hydrodynamic(al) cooling tower according to claim 1 directly drives radial water turbine, it is characterized in that the unit speed of above-mentioned runner (7)
for constant, between 37～57, n is blower fan rated speed, and H is water turbine intake-outlet pressure difference, and D1 is runner water intake diameter; Described runner 7 runner section size relationships are that h1 and D1 ratio are 0.095～0.105, h2 and D1 ratio are 0.218～0.228, the ratio of D2 and D1 is 0.501～0.511, described runner 7 comprises crown 4, lower ring 5, is clamped in 11～15 bending tablet blades 6 between crown 4 and lower ring 5, described crown 4 is curved surface, its bus is three sections of curvature circular arcs that do not wait, and the ratio of radius of curvature R 1, R2, R3 and D1 is respectively 1.104～1.108,0.225～0.229,0.232～0.236; Described lower ring 5 is curved surface, its bus is two sections of curvature circular arcs that do not wait, the ratio of radius of curvature R 4, R5 and D1 is respectively 0.385～0.389,0.194～0.198, described curved vane 6 are a spoonful shape, tortuosity is by blade import laying angle β 1 and outlet laying angle β 2 decisions, and the difference of β 1 and β 2 is between 148 °～159 °, and described import laying angle β 1 is 106 °～110 °, outlet laying angle β 2 is between-42 °～-49 °, and curved vane (6) thickness equates;
Wherein h1 is that water intake water intake diameter, the h2 high, that D1 is runner (7) of runner (7) are that runner channel is high, D2 is the water outlet diameter of runner (7).
4. hydrodynamic(al) cooling tower according to claim 1 directly drives radial water turbine, it is characterized in that above-mentioned seat ring (3) comprises the upper seat ring being arranged in parallel, lower seat ring, upper seat ring, the outward edge of lower seat ring is half fillet, the fillet radius R6 of upper seat ring and D1 ratio are 0.015～0.019, the fillet radius R7 of lower seat ring and D1 ratio 0.009～0.013, the thickness h 4 of upper seat ring is 0.028～0.043 with the ratio of D1, the thickness h 6 of lower seat ring is 0.018～0.033 with the ratio of D1, the interior circular diameter L3 of seat ring 3 and D1 ratio are 1.037～1.047, the outside diameter L2 of upper seat ring and the ratio of D1 are 1.328～1.338, the outside diameter L4 of lower seat ring and the ratio of D1 are 1.314～1.324, in described seat ring 3, stator 2 quantity are 13～16, stator head upstream face is connected with back side is round and smooth, the high b of stator is the high h1 of water intake of runner 7, and stator adopts symmetrical stator, and in it, the ratio of circular diameter D3, outside diameter D4 and D1 is respectively 1.065～1.071,1.234～1.240, wherein D1 is the water intake diameter of runner (7).
5. hydrodynamic(al) cooling tower according to claim 1 directly drives radial water turbine, it is characterized in that the high h3 of above-mentioned conical draft tube (8) and the ratio of runner water intake diameter D1 are 0.25～0.75, and diffusion angle is 15 °～30 °.
6. hydrodynamic(al) cooling tower according to claim 1 directly drives radial water turbine, it is characterized in that above-mentioned spiral case (1) is elliptical spiral casing, ratio between oval cross section major axis and oval cross section minor axis is 1.10～1.35, the side-to-side dimensions L1 of spiral case 1 and D1 ratio are 2.05～2.20, and wherein D1 is the water intake diameter of runner (7).
7. a kind of hydrodynamic(al) cooling tower according to claim 1 directly drives radial water turbine, it is characterized in that above-mentioned draft cone (11) is right cone type, the high h7 of draft cone 11 and D1 ratio are 0.05～0.11, wide L6 and D1 ratio are 0.115～0.125, upper end round platform diameter R8 and D1 ratio are 0.125～0.135, lower end round platform diameter L5 and D1 ratio are 0.043～0.053, and wherein D1 is the water intake diameter of runner (7).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310487783.6A CN103982362A (en) | 2013-10-18 | 2013-10-18 | Hydrodynamic direct-drive radial-flow water turbine of cooling tower |
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| CN201310487783.6A CN103982362A (en) | 2013-10-18 | 2013-10-18 | Hydrodynamic direct-drive radial-flow water turbine of cooling tower |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104864767A (en) * | 2015-06-04 | 2015-08-26 | 江苏环球龙圣环境科技发展有限公司 | Water turbine type splashing device |
| CN113266504A (en) * | 2021-05-17 | 2021-08-17 | 西安理工大学 | Mixed-flow water turbine with bionic tadpole-shaped blades |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201250750Y (en) * | 2008-09-16 | 2009-06-03 | 河南新飞纪元科技有限公司 | Mixed-flow type hydraulic turbine specially for driving cooling tower blower |
| CN101555859A (en) * | 2009-05-14 | 2009-10-14 | 河南新飞纪元科技有限公司 | Francis turbine runner with ultra-low specific rotating speed specially used for driving cooling tower fan |
| EP2436916A1 (en) * | 2009-05-27 | 2012-04-04 | Nanjing Xingfei Cooling Equipment Co.,ltd. | Rotating wheel used for direct-connection low-speed small-scale mixed-flow hydroturbine of hydrodynamic energy-saving cooling tower |
| US20120114471A1 (en) * | 2009-05-27 | 2012-05-10 | Nanjing Xingfei Cooling Equipment Co., Ltd. | Direct-Connected Low-Speed Small Mixed Flow Type Water Turbine Applied In Hydrodynamic Energy-Saving Cooling Tower |
| CN103216374A (en) * | 2013-04-02 | 2013-07-24 | 河海大学 | Low-specific speed small mixed flow water turbine |
| CN103953491A (en) * | 2013-08-02 | 2014-07-30 | 河海大学 | Direct-drive runoff water turbine for hydrodynamic cooling tower |
| CN203770013U (en) * | 2013-10-18 | 2014-08-13 | 河海大学 | Direct-driven radial-flow type water turbine for hydrodynamic cooling tower |
-
2013
- 2013-10-18 CN CN201310487783.6A patent/CN103982362A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201250750Y (en) * | 2008-09-16 | 2009-06-03 | 河南新飞纪元科技有限公司 | Mixed-flow type hydraulic turbine specially for driving cooling tower blower |
| CN101555859A (en) * | 2009-05-14 | 2009-10-14 | 河南新飞纪元科技有限公司 | Francis turbine runner with ultra-low specific rotating speed specially used for driving cooling tower fan |
| EP2436916A1 (en) * | 2009-05-27 | 2012-04-04 | Nanjing Xingfei Cooling Equipment Co.,ltd. | Rotating wheel used for direct-connection low-speed small-scale mixed-flow hydroturbine of hydrodynamic energy-saving cooling tower |
| US20120114471A1 (en) * | 2009-05-27 | 2012-05-10 | Nanjing Xingfei Cooling Equipment Co., Ltd. | Direct-Connected Low-Speed Small Mixed Flow Type Water Turbine Applied In Hydrodynamic Energy-Saving Cooling Tower |
| CN103216374A (en) * | 2013-04-02 | 2013-07-24 | 河海大学 | Low-specific speed small mixed flow water turbine |
| CN103953491A (en) * | 2013-08-02 | 2014-07-30 | 河海大学 | Direct-drive runoff water turbine for hydrodynamic cooling tower |
| CN203770013U (en) * | 2013-10-18 | 2014-08-13 | 河海大学 | Direct-driven radial-flow type water turbine for hydrodynamic cooling tower |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104864767A (en) * | 2015-06-04 | 2015-08-26 | 江苏环球龙圣环境科技发展有限公司 | Water turbine type splashing device |
| CN104864767B (en) * | 2015-06-04 | 2016-09-28 | 广东粤电中山热电厂有限公司 | A kind of water turbine type spraying and splashing facility |
| CN113266504A (en) * | 2021-05-17 | 2021-08-17 | 西安理工大学 | Mixed-flow water turbine with bionic tadpole-shaped blades |
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Application publication date: 20140813 |