CN217582350U - Low unit rotating speed through-flow turbine - Google Patents
Low unit rotating speed through-flow turbine Download PDFInfo
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- CN217582350U CN217582350U CN202220072124.0U CN202220072124U CN217582350U CN 217582350 U CN217582350 U CN 217582350U CN 202220072124 U CN202220072124 U CN 202220072124U CN 217582350 U CN217582350 U CN 217582350U
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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
A low unit rotation speed through-flow turbine is characterized in that uniformly distributed fixed guide vanes are installed in an outlet of a volute diversion chamber, movable guide vanes are uniformly distributed in the volute diversion chamber on the inner face of each fixed guide vane, a low unit rotation speed through-flow rotating wheel is installed at one end of a main shaft in the center of the volute diversion chamber on the inner face of each movable guide vane, the unit rotation speed n110 of each low unit rotation speed through-flow rotating wheel is 70 to 100r/min, and the unit flow Q110 of each low unit rotation speed through-flow rotating wheel is 0.15 to 0.23m 3 The other end of the main shaft penetrates through the water outlet chamber and is arranged in a bearing on the bearing support, and extends out of the bearing and is connected with an input shaft of the generator through a coupler; the utility model discloses simple structure, design scientific and reasonable, unit rotational speed is less than conventional through-flowThe optimal unit rotating speed of the tubular turbine avoids the condition of overhigh rotating speed of a set when the traditional tubular turbine is used, the lower limit applicable to the optimal unit flow in the field of industrial excess pressure recycling is lower than the unit flow of the traditional tubular turbine, and the tubular turbine has the advantages of wide application range, wide high-efficiency area, excellent hydraulic performance and the like, and has good social and economic benefits.
Description
Technical Field
The utility model relates to a hydraulic turbine, especially a low unit rotational speed through-flow turbine.
Background
In the pipe network of industrial circulating water, water delivery, heating, etc., in order to adjust the water power balance and use the valve throttle frequently, the pressure can be wasted in the throttling process, generally will use the excess pressure generating set to reclaim the energy, the turbine has the advantage of compact structure, the floor area is small, but because of the structural deficiency, the high-efficient area of the traditional turbine fixed blade set is narrow, the ability to adapt to the fluctuation of the systematic flow is limited, generally can only lock the opening of the guide vane in the optimum opening, achieve the purpose of regulating systematic flow through changing the method of the opening of the inlet valve and bypass valve, but bring the difficult problem that the systematic regulation is complicated and the excess energy is not recovered completely like this, because the unit rotational speed of the traditional turbine is higher, there is the phenomenon of the over-high rotational speed under some scenes, cause the bearing life to be shorter, the loud noise, in order to overcome the deficiency of the prior art, the application scope is wide, the high-efficient area is wide, adjust flexibly, the demand of the new turbine of the stable new type of operation is researched and developed urgently.
SUMMERY OF THE UTILITY MODEL
To the above situation, for overcoming the defects of the prior art, the utility model aims to provide a low unit rotation speed tubular turbine, which can effectively solve the problems of short bearing life and large noise caused by overhigh rotation speed of the traditional tubular turbine set.
In order to realize the above purpose, the utility model provides a technical scheme is, a low unit rotational speed through-flow turbine, flow the part including the full runner, the full runner flows the part and includes stator, movable vane, low unit rotational speed through-flow runner, play water chamber and spiral case diversion chamber, spiral case diversion chamber export in be equipped with the stator of equipartition, the activity vane is equipped with to the equipartition in the spiral case diversion chamber of stator inner face, the low unit rotational speed through-flow runner is equipped with to main shaft one end in the spiral case diversion chamber center of activity vane inner face, the unit rotational speed n110 of low unit rotational speed through-flow runner is 70 to 100r/min, unit flow Q110 is 0.15 to 0.23m 3 And/s, the other end of the main shaft penetrates through the water outlet chamber and is arranged in a bearing on the bearing support, and the other end of the main shaft extends out of the bearing and is connected with an input shaft of the generator through a coupler for outputting torque.
The utility model discloses simple structure, design scientific and reasonable, unit rotational speed are less than the optimum unit rotational speed of conventional tubular turbine, appear the too high condition of unit rotational speed when avoiding using traditional tubular turbine, are convenient for use the lower limit that the optimum unit flow is suitable for in industry excess pressure recycle field and are less than traditional tubular turbine unit flow, have advantages such as application scope is wide, high-efficient district is wide, hydraulic performance is good, have good society and economic benefits.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a low/medium unit rotation speed tubular runner (with an outer ring) according to the present invention;
FIG. 3 is a schematic view of a low or medium unit rotation speed tubular runner (without an outer ring) of the present invention;
FIG. 4 is the present inventionPractical through-flow type rotating wheel hub with middle-low unit rotating speed, wheel rim diameter and blade placing angle beta 1b A schematic diagram;
fig. 5 is a schematic view of the wrap angle α of the blades of the through-flow turbine in the middle/low unit rotation speed of the present invention.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.
The low-unit-rotation-speed through-flow turbine is provided by combining the attached drawing, the geometric shape and parameters of a low-unit-rotation-speed through-flow runner 3 are between a mixed flow type and a traditional through-flow runner, the hydraulic performance is also between the mixed flow turbine and the traditional through-flow turbine, the situation that the rotation speed of a unit is overhigh when the traditional through-flow turbine is used can be avoided, the low-unit-rotation-speed through-flow turbine comprises a full-flow-channel overflowing part, the full-flow-channel overflowing part comprises a fixed guide vane 1, a movable guide vane 2, a low-unit-rotation-speed through-flow runner 3, a water outlet chamber 4 and a volute diversion chamber 8, a uniformly distributed fixed guide vane 1 is arranged in an outlet of the volute diversion chamber 8, movable guide vanes 2 are uniformly distributed in the volute diversion chamber 8 on the inner surface of the fixed guide vane 1, a low-unit-rotation-speed through-flow runner 3 is arranged at one end of a main shaft 5 in the center of the volute diversion chamber 8 on the inner surface of the movable guide vane 2, the unit-rotation-speed through-flow runner 3 is 70 to 100r/min at a unit rotation speed, and a unit-rotation speed Q110 is 0.15 to 0.23m 3 And the other end of the main shaft 5 penetrates through the water outlet chamber 4 and is arranged in a bearing 6-1 on the bearing support 6, extends out of the bearing 6-1 and is connected with an input shaft of a generator 7 through a coupler for outputting torque.
In order to ensure better implementation effect, the low unit rotating speed through-flow type rotating wheel 3 comprises a hub 3-1, blades 3-2 and a rim 3-3, wherein the blades 3-2 are uniformly arranged on the periphery of the hub 3-1, the rim 3-3 is arranged on the other side of the blades 3-2, and the low unit rotating speed through-flow type rotating wheel is divided into two types including an outer ring and a non-outer ring according to whether the rim 3-3 is connected with the outer ring or not, as shown in fig. 3, the low unit rotating speed through-flow type rotating wheel is an embodiment without the outer ring.
The rim 3-3 of the blade 3-2 is provided with an annular outer ring 3-4, as shown in figure 2.
The optimal unit rotating speed n110 of the low unit rotating speed through-flow runner 3 is between 70 and 100r/min, which is 130 to 200r lower than the optimal unit rotating speed of the conventional through-flow turbineThe optimal unit flow Q110 is between 0.15 and 0.23m 3 The lower limit of the optimal unit flow rate is 1.2 to 2.0m lower than the optimal unit flow rate of the traditional through-flow turbine within a period of/s 3 /s。
The blade inlet setting angle beta of the low unit rotating speed through-flow type rotating wheel 3 1b The angle of 30-90 degrees is larger than the inlet installation angle of a runner of a conventional through-flow turbine, the wrap angle alpha of each blade is 40-95 degrees and is smaller than the wrap angle of the conventional through-flow turbine, the number of the blades is 5-11, the ratio of an inlet hub D2/D1 is 0.3-0.8 when being larger than that of the conventional through-flow turbine, and the inlet hub ratio is gradually increased along with the reduction of unit flow.
The inlet speed moment of the low unit rotating speed through-flow type runner 3 is determined by the outlet of the movable guide vane 2, the inlet speed moment of the low unit rotating speed through-flow type runner 3 is distributed from the hub 3-1 to the flange 3-3 from small to large, and is similar to the rule formed by the guide vanes of the traditional through-flow type turbine, but the number of the runner blades is 5-11 and is slightly more than that of the conventional through-flow type turbine, a blade path is effectively formed between blade grids, the design method of the low unit rotating speed through-flow type runner 3 is not consistent with the lifting force method adopted by the traditional through-flow type turbine, and the optimal unit rotating speed is generally lower than that of the traditional through-flow type turbine, so the low unit rotating speed through-flow type turbine is called.
The utility model discloses when specifically using, rivers get into stator 1 by 8 imports of spiral case diversion chamber, form the required speed square of low unit rotational speed through-flow runner 3 through activity stator 2, and the delivery port through play water outlet chamber 4 is discharged after the rivers work, and low unit rotational speed through-flow runner 3 rotates and drives main shaft 5 and rotate to the generator transmission moment of torsion, the utility model discloses optimum unit rotational speed n110 is between 70 to 100r/min, is less than the optimum unit rotational speed of conventional through-flow turbine, and optimum unit flow Q110 is between 0.15 to 0.23m 3 The lower limit of the application is lower than the unit flow of the traditional through-flow turbine.
The utility model discloses runner geometry and parameter are between mixed flow and traditional through-flow runner, and hydraulic performance also between the hydraulic turbine of mixed flow turbine and traditional through-flow turbine, the too high condition of unit rotational speed appears when can avoiding using traditional through-flow turbine, application scope and high efficiency area broad, better adaptation system flow change, compact structure moves stably, improves the narrow problem of conventional through-flow turbine application range, enlarges through-flow turbine's application scope.
The utility model discloses simple structure, design benefit, it is better through actual engineering inspection effect, relevant data as follows:
in a process circulating water residual pressure recovery power generation project of a certain coking device, the highest point of a circulating water system is +33m of the outlet elevation of a primary cooler, the current high-level water flow is throttled by a water return valve to reduce the impact of water drop, a low unit rotating speed through-flow turbine is selected to recover and generate the pressure energy originally consumed at the upper tower valve, and the system flow is 1500 to 2000m 3 The water head is maintained to be about 20m, the system flow fluctuates along with seasons because the restriction of the site space adopts the low specific speed tubular turbine (namely the utility model discloses), the unit rotation speed of the optimal working condition of unit design is 85r/min, the optimal unit flow is 0.645m 3 S, increasing the over-flow of the unit to 2000m by opening the guide vane to a large opening 3 H, maximum unit flow rate of 0.86m 3 The operation is stable at/s. The number of the runner blades is 8, the rim of each blade is connected with the outer ring, the installation angle from the hub to the inlet of each blade of the rim is 34.8 to 59.3 degrees, the wrap angle of each runner blade is 40 to 50 degrees, running tests show that the through-flow turbine with low unit rotating speed has good actual running effect, and the requirement of the flow change of a system can be effectively met through the adjustment of the movable guide vanes.
In a certain coal-to-methanol circulating water excess pressure power generation project, the circulating water return pressure is about 0.24 to 0.26 MPa, the height of an upper tower branch pipe of a cooling tower is about 10m, the available pressure head is about 9 to 10m, the average flow of the cooling tower in summer is about 5000m & lt 3 & gt/h, and the average flow of the cooling tower in winter is about 4500m 3 The flow control demand can't be satisfied to traditional tubular turbine for use,/h, adopts the utility model discloses low unit rotational speed tubular turbine designs, and optimum unit rotational speed is 98r/min, and optimum unit flow is 1.92m 3 The number of the blades of the rotating wheel is 5, the rim of the blade is not provided with an outer ring, the placement angle of the inlet of the rotating wheel is 35 to 75 degrees from the hub to the rim, the hub ratio of the inlet of the rotating wheel is about 0.3, the wrap angle of the blade is 65 to 80 degrees, and through running tests, the through-flow at low unit rotating speed is lowThe design and operation effect of the hydraulic turbine is excellent, and the hydraulic turbine can be adapted to good operation in winter and summer through adjustment of the movable guide vanes.
The utility model discloses the novel uniqueness of structure, the wide operation operating range in high efficiency district is wide, compares with prior art, has following advantage:
1. the utility model discloses full runner is according to hydraulic turbine theoretical design, and runner geometry and parameter are between mixed flow and traditional through-flow runner, and hydraulic performance also is between mixed flow turbine and the hydraulic turbine of traditional through-flow turbine, and the unit rotational speed is less than traditional through-flow turbine, can avoid the too high condition of unit rotational speed to appear when using traditional through-flow turbine, is convenient for use in industry excess pressure recycle field;
2. the utility model discloses the optimum unit rotational speed is less than traditional through-flow turbine, and optimum unit flow range lower limit is wider in conventional through-flow turbine, the requirement of adaptation system flow change that can be fine, and compact structure moves stably.
In a word, can be known from the above-mentioned, the utility model relates to a low unit rotational speed through-flow turbine, mainly used excess pressure electricity generation field, solve traditional through-flow fixed blade turbine high efficiency district narrow, application scope limited etc. not enough, the turbine is total to be said and is included stator, adjustable guide vane, low unit rotational speed through-flow runner and play hydroecium, the optimum unit rotational speed n of turbine 110 The flow rate is obviously lower than that of a conventional through-flow turbine within 70 to 100r/min, and the optimal unit flow rate Q is 110 At 0.15 to 2.3m 3 The lower limit of the turbine is obviously wider than that of the conventional through-flow turbine, the number of the rotating wheel blades is 5-9, the wrap angle alpha of the blades is 40-95 degrees and is smaller than that of the conventional through-flow turbine, and the inlet installation angle beta of the blades is smaller than that of the conventional through-flow turbine 1b The cross flow turbine is larger than a conventional cross flow turbine at an angle of between 30 and 90 degrees, the hub ratio D2/D1 of a rotating wheel inlet is between 0.3 and 0.8, the cross flow turbine with low unit rotating speed has a wider application range and a wider high-efficiency area, can better adapt to the requirement of system flow change, has a compact structure, runs stably, and has better economic and energy-saving benefits.
Claims (5)
1. A low unit rotation speed through-flow turbine is composed of a full-channel turbineThe flow component is characterized in that the outlet of the volute diversion chamber (8) is internally provided with the uniformly distributed fixed guide vanes (1), the movable guide vanes (2) are uniformly arranged in the volute diversion chamber (8) on the inner surface of the fixed guide vanes (1), one end of a main shaft (5) in the center of the volute diversion chamber (8) on the inner surface of the movable guide vanes (2) is provided with the low-unit-rotation-speed through-flow runner (3), the unit rotation speed n110 of the low-unit-rotation-speed through-flow runner (3) is 70 to 100r/min, and the unit flow Q110 is 0.15 to 0.23m 3 And/s, the other end of the main shaft (5) penetrates through the water outlet chamber (4) and is arranged in a bearing (6-1) on the bearing support (6), extends out of the bearing (6-1) and is connected with an input shaft of a generator (7) through a coupler for outputting torque.
2. A low unit rotational speed through-flow turbine according to claim 1, wherein the low unit rotational speed through-flow runner (3) comprises a hub (3-1), blades (3-2) and a rim (3-3), the blades (3-2) are uniformly arranged on the periphery of the hub (3-1), and the rim (3-3) is arranged on the other side of the blades (3-2).
3. A low unit speed flow turbine according to claim 2, characterized in that said blades (3-2) are provided with an annular outer ring (3-4) at the rim (3-3).
4. A low unit speed flow turbine according to claim 2 or 3, wherein said low unit speed flow turbine runner (3) has a blade inlet angle β 1b The angle is 30-90 degrees, the wrap angle alpha of the blades is 40-95 degrees, the number of the blades is 5-11, the inlet hub ratio D2/D1 is 0.3-0.8, and the inlet hub ratio gradually increases with the decrease of the unit flow.
5. A low unit rotational speed flow turbine according to claim 1, wherein a seal ring is installed at the contact part of the main shaft (5) and the outlet chamber (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202220072124.0U CN217582350U (en) | 2022-01-12 | 2022-01-12 | Low unit rotating speed through-flow turbine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220072124.0U CN217582350U (en) | 2022-01-12 | 2022-01-12 | Low unit rotating speed through-flow turbine |
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| CN217582350U true CN217582350U (en) | 2022-10-14 |
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| CN202220072124.0U Active CN217582350U (en) | 2022-01-12 | 2022-01-12 | Low unit rotating speed through-flow turbine |
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