CN104265546A - Ultralow-specific speed turbine motor directly driving large water-cooling tower fan - Google Patents
Ultralow-specific speed turbine motor directly driving large water-cooling tower fan Download PDFInfo
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- CN104265546A CN104265546A CN201410362574.3A CN201410362574A CN104265546A CN 104265546 A CN104265546 A CN 104265546A CN 201410362574 A CN201410362574 A CN 201410362574A CN 104265546 A CN104265546 A CN 104265546A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
- F03B11/02—Casings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
- F03B3/12—Blades; Blade-carrying rotors
- F03B3/121—Blades, their form or construction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B3/00—Machines or engines of reaction type; Parts or details peculiar thereto
- F03B3/16—Stators
- F03B3/18—Stator blades; Guide conduits or vanes, e.g. adjustable
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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
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses an ultralow-specific speed turbine motor directly driving a large water-cooling tower fan. The ultralow-specific speed turbine motor consists of three parts of a water inlet section, an acting section and a tail water section, wherein the water inlet section comprises a volute and a base ring; the acting section comprises an upper crown, a turbine chamber side wall, a turbine motor turbine, a turbine motor main shaft and a lower cover; the tail water section comprises a tail water pipe and a tail water connecting pipe; the volute is connected with the upper end of the base ring through a bolt; the outer side of the lower end of the base ring is connected with an outer side plate of a rotating wheel chamber through a bolt, and the inner side of the lower end of the base ring is connected with the upper crown through a bolt; the outer side plate of the rotating wheel chamber is connected with the outer side of the upper end of the tail water pipe through a bolt; the inner side of the upper end of the tail water pipe is connected with the lower cover through a bolt; the turbine motor main shaft is mounted in a bearing chamber in the middle of the upper crown through a pair of bearings; and one end of the turbine motor main shaft is connected with a turbine motor rotating wheel through a key, and the other end of the turbine motor main shaft is connected with the water-cooling tower fan. Pressure circulating water of a water cooling tower is used for impacting the turbine motor to rotate for acting so as to pull the directly connected water-cooling tower fan to rotate.
Description
One, technical field
The present invention relates to a kind of energy conversion device, specifically relating to a kind of is the device of rotating mechanical energy by pressure water stream implication Conversion of Energy, is a kind of ultra-low specific speed turbo machine directly driven in large-size water-cooling tower blower fan.
Two, background technique
, super-sized enterprises large-scale in petrochemical industry, smelting etc., mostly use circulating water type cooling tower to reduce temperature, for various reasons, for cooling tower provides the water pump of circulating water mostly to leave abundant lift surplus, utilize the power of the turbo machine of this surplus design, be enough to alternative cooling tower and drag the motor of cooling blower rotation to reach energy-conservation object.
Cooling tower inner space is narrow and small, and therefore the turbo machine of Driving Fan should be small and exquisite as much as possible, efficient.According to the flow that cooling-tower circulating water provides, rotating speed and rich head, its unit specific speed being converted to turbo machine is between 40 ~ 70, according to conventional turbo machine type spectrum, and the turbo machine type that so low specific speed adapts should between impact type and mixed-flow type selecting, but because the tailrace outlet working in turbo machine is in such cases for there being extrusion water, and blow down turbine is under the working environment having pressure tail water, its efficiency too low (generally not higher than 75%) its air horsepower cannot meet the demands, because specific speed is too low, the horizontal dimension of common combined flow turbine is too large, the direct ventilation effect affecting cooling tower, and then affect the cooling effect of cooling tower, therefore, change the design method of common combined flow turbine, a kind of ultra-low specific speed turbo machine directly driven in large-size water-cooling tower blower fan of specialized designs, the cooling blower of its main shaft and cooling tower is directly connected, to ensure the requirement of the smooth and easy and power of fan of the ventilation of cooling tower, and reach energy-conservation object.
Three, summary of the invention
The object of the present invention is to provide a kind of small and exquisite, efficient ultra-low specific speed turbo machine directly driven in large-size water-cooling tower blower fan.
This device utilizes fluid machinery, fluid mechanics scheduling theory makes, by the rich head (lift) of cooling-tower circulating water, by the spiral case in inlet segment and lead the speed current that grid are converted into certain flow rate and certain orientation, and then the oar grid tangentially poured in the turbine wheel being arranged in work done section, promote turbine wheel to rotate around main turbine shaft, and drag the water-cooling tower blower fan with main turbine shaft direct connection, acting is rotated with the design speed of blower fan, the lack of water flowing out work done section flows into tail water section, and in tail water section, complete the conversion of the rich head of remaining part in circulating water.
The object of the invention is to be realized by following technological scheme:
A kind of ultra-low specific speed turbo machine directly driven in large-size water-cooling tower blower fan, comprise inlet segment, work done section and tail water section three part composition, inlet segment is made up of spiral case 1, seat ring 2, work done section is made up of crown 3, turbine chamber sidewall 4, turbine wheel 5, main turbine shaft 6, lower cover 7, and tail water section is made up of draft tube 8, tail water connecting tube 9; It is characterized in that the water intake 10 of spiral case 1 is connected by standard flange with intake tower circulating water main,
The ring water-out manners of the axis of the water outlet employing of spiral case 1, this ring water outlet connecting end 11 is connected by the feed-water end of bolt with seat ring 2; The outside of the waterexit end of seat ring 2 is connected by the upper flanges of bolt with worm gear room sidewall 4, and the inner side of seat ring 2 waterexit end is connected with crown 3 by bolt; Crown 3 intermediate portion be above the cylinder-shaped bearing room 13 of a hollow, main turbine shaft 6 is installed in the bearing chamber 13 of crown 3 by pair of bearings 14, and the disk lateral part of crown 3 is by the internal link of bolt and seat ring 2 lower end; The lower end flange of worm gear room sidewall 4 and the upper end outer flange of draft tube 8 are bolted, and the upper flanges of worm gear room sidewall 4 is connected by the outside of bolt with seat ring 3 lower end; Lower cover 7 is the class disc elements surrounding worm gear chamber body, and its lateral part is connected with draft tube 8 upper end inner flange by bolt; Turbine wheel 5 lateral part welding by blade 15 form oar grid, the retaining ring of a ring is welded in the outside of oar grid, and the wheel hub 16 in the middle part of turbine wheel 5 is connected with the bottom of bolt with main turbine shaft 6 by key; The intermediate portion of main turbine shaft 6 is installed in the cylinder-shaped bearing room 13 of crown 3 by pair of bearings 14, and the top of main turbine shaft 6 is connected with blower fan of cooling tower by key; The upper end inner flange of draft tube 8 is connected with lower cover 7 by bolt, and the upper end outer flange of draft tube 8 is by the lower end Flange joint of bolt and worm gear room sidewall 4, and the lower end flange of draft tube 8 is connected by the upper flanges of bolt with tail water connecting tube 9; The flange of four pant like connecting tubes 18 of tail water connecting tube 9 lower end is connected with cooling tower water distributor by bolt.
The described ultra-low specific speed turbo machine directly driven in large-size water-cooling tower blower fan, it is characterized in that described spiral case 1 is according to the scroll casing shape structure waiting the change of gradual change circular area, rotate a circle around main turbine shaft, the deferent that these gradual changes such as grade are round bunch is positioned at apart from the cylndrical surface of main turbine shaft same distance; Immediately below spiral case 1 be one and be positioned at same turbine shaft cross section, wide ring water outlet, the lower end of this ring water outlet is welded with water outlet connecting end 11 under ring, waits the central diameter of distance with water outlet connecting end 11 under ring of the distance of center circle main turbine shaft of gradual change circle bunch, the central diameter of central diameter that seat ring 2 leads grid, turbine wheel 5 oar grid is identical.
The described ultra-low specific speed turbo machine directly driven in large-size water-cooling tower blower fan, it is characterized in that described seat ring 2 is columnar structured by the class of two coaxial, middle welding stators 12, inside the upper end part that seat ring 2 injects spiral case part, flow channels is horn mouth shape.
The described ultra-low specific speed turbo machine directly driven in large-size water-cooling tower blower fan, it is characterized in that described stator 12 is a kind of three-dimensional twisted airfoil structures, relative thickness 9.6% outside the wing, relative camber 8.2% outside the wing, wing outer inlet established angle 29 degree, wing outer outlets established angle 14 degree, outside the wing, leading edge adopts major semi axis 59 millimeters, the part elliptical that semi-minor axis is 16.5 millimeters, outside the wing, trailing edge is sharp edge; Relative thickness 12.3% inside the wing, relative camber 14.3% inside the wing, wing inner inlet port established angle 44 degree, outlet laying angle 14 degree, inside the wing, leading edge adopts major semi axis 59 millimeters, and the part elliptical that semi-minor axis is 18 millimeters, inside the wing, trailing edge is sharp edge.
The described ultra-low specific speed turbo machine directly driven in large-size water-cooling tower blower fan, is characterized in that described turbine wheel 5 is discoid runners, is welded outside it by the blade 15 forming oar grid, and oar grid are web distribution.
The described ultra-low specific speed turbo machine directly driven in large-size water-cooling tower blower fan, it is characterized in that described blade 15 is a kind of three-dimensional twisted airfoil structures, relative thickness 10.8% outside the wing, relative camber 37.9% outside the wing, wing outer inlet established angle 50.3 degree, wing outer outlets established angle-18.6 is spent, and outside the wing, leading edge adopts major semi axis 9.86 millimeters, the part elliptical that semi-minor axis side is 6.36 millimeters, outside the wing, trailing edge is sharp edge; ; Relative thickness 11.2% inside the wing, relative camber 40.85% inside the wing, wing inner inlet port established angle 37.6 degree, outlet laying angle-21.5 is spent, and inside the wing, leading edge adopts major semi axis 9.13 millimeters, and the part elliptical that semi-minor axis side is 5.94 millimeters, inside the wing, trailing edge is sharp edge.
The described ultra-low specific speed turbo machine directly driven in large-size water-cooling tower blower fan, the madial wall that it is characterized in that described draft tube 8 is cylindrical shape, outer side wall is frustoconic shape, upper end is welded together medial and lateral by flange, lower end is also welded together medial and lateral by flange, forms the surface structure of frustoconic shape; The inside and outside sidewall of draft tube 8 is welded into an entirety by 8 tail water airflow fences 17, ring water outlet section is divided into eight fan-shaped go out the water surface.
The described ultra-low specific speed turbo machine directly driven in large-size water-cooling tower blower fan, it is characterized in that the water inlet section of described tail water connecting tube 9 is the ring being divided into eight water inlet sections, every two fan-shaped water inlet end faces are merged into the water inlet end face of a pant like connecting tube 18, the water outlet end face of four pant like connecting tubes 18 is all deformed into standard pipe, is connected respectively with water distributor.
Working principle of directly driving ultra-low specific speed turbo machine in large-size water-cooling tower blower fan of the present invention: the water intake 10 that the pressure water coming from circulating water pump flows through spiral case 1 enters spiral case 1, in the spiral case 1 waiting variable cross section according to etc. leveled circular circular velocity motion, pressure water stream simultaneously in spiral case 1, from be positioned at spiral case 1 just below ring water outlet connecting end 11 evenly enter seat ring 2, the nozzle effect of stator 12 in seat ring 2, speed is improved, and the component produced circumferentially, make current produce enough circular rectors in the outlet of stator 12; The current flowing out stator 12 tangentially enter the blade 15 of the turbine wheel 5 be rotating, and in three-dimensional twisted blade 15, change flow velocity direction and size, complete the conversion of energy; The current flowed out from blade 15, by draft tube 8, enter tail water connecting tube 9, then enter cooling tower water distributor; To complete flow energy to rotating machinery conversion of energy in the oar grid that pressure water stream forms at the blade 15 of turbine wheel 5, be forced through key peace
The turbine wheel 5 being loaded on main turbine shaft 6 lower end rotates, and drives main turbine shaft 6 to rotate, and then the blower fan of drive installation in main turbine shaft 6 upper end rotates, and completes the output of rotating mechanical energy.
The ultra-low specific speed turbo machine directly driven in large-size water-cooling tower blower fan of the present invention has the following advantages compared with ordinary water turbine: the present invention adopts this mode of water outlet under spiral case, greatly reduce the radial dimension of turbo machine, in order to adapt to cooling tower internal structure, the annular cascade (oar grid) with strike-back function is utilized to do work, greatly reduce the specific speed of turbo machine, corresponding to the work done form of turbine wheel, have employed the draft tube pattern of annular water outlet, and by tail water connecting tube, the lack of water making merit is divided into quarter, access water distributor respectively.
The ultra-low specific speed turbo machine directly driven in large-size water-cooling tower blower fan of the present invention, owing to have employed the special type spiral case of lower water outlet, its radial dimension reduces greatly, is conducive to the air-conditioning requirement in cooling tower; Owing to have employed the draft tube pattern of annular water outlet, turbo machine can be made directly to be installed in the central seat of cooling tower, the even water outlet of the surrounding along pedestal, be conducive to the installation of turbines and the smooth and easy of ventilation; Of the present inventionly directly to drive in large-size water-cooling tower
The operating mode of the ultra-low specific speed turbo machine of blower fan is comparatively single, thus only have employed and fixedly leads grid and fixing oar grid, substantially reduce radial dimension, and simplify the complexity of turbo machine, reduce fabricating cost.The present invention can, according to the actual speed of the flow condition of reality and cooling blower, ensure, with the high efficiency of the turbo machine of water-cooling tower blower fan direct connection, to have broad application prospects and promotional value.
Four, accompanying drawing illustrates:
Fig. 1-directly drive ultra-low specific speed turbine structure schematic diagram in large-size water-cooling tower blower fan
Fig. 2-worm frame schematic diagram
Fig. 3-seat ring structural representation, A-front elevational view, B-plan view
Fig. 4-crown structural representation
Fig. 5-turbine chamber sidewall structure schematic diagram
Fig. 6-turbine wheel structural representation, A-front elevational view, B-plan view
Fig. 7-main turbine shaft structural representation
Fig. 8-lower cover structure schematic diagram
Fig. 9-draft tube structural representation, A-front elevational view, B-plan view
Figure 10-tail water connecting pipe structure schematic diagram, figure cuts open in A-plan view, B-office
Figure 11-guide vane structure schematic diagram
Figure 12-paddle blade structure schematic diagram
Reference character:
1-spiral case
2-seat ring
3-crown
4-turbine chamber sidewall
5-turbine wheel
6-main turbine shaft
7-lower cover
8-draft tube
9-draft tube connecting end
10-water intake
Water outlet connecting end under 11-ring
12-stator
13-bearing chamber
14-bearing
15-blade
16-wheel hub
17-tail water airflow fence
18-pant like connecting tube
Five, embodiment:
Implement 1: directly drive the ultra-low specific speed turbo machine in large-size water-cooling tower blower fan
For a kind of ultra-low specific speed turbo machine directly driven in large-size water-cooling tower blower fan of the circulating water Deethanizer design of 5000 tphs, 10.5 meters heads, 107 turns per minute of rotating speed, comprise inlet segment, work done section and tail water section three part composition, inlet segment is made up of spiral case 1, seat ring 2, work done section is made up of crown 3, turbine chamber sidewall 4, turbine wheel 5, main turbine shaft 6, lower cover 7, and tail water section is made up of draft tube 8, tail water connecting tube 9; It is characterized in that the water intake 10 of spiral case 1 is connected by standard flange with intake tower circulating water main, the ring water-out manners of the axis of the water outlet employing of spiral case 1, this ring water outlet connecting end 11 is connected by the feed-water end of bolt with seat ring 2; The outside of the waterexit end of seat ring 2 is connected by the upper flanges of bolt with worm gear room sidewall 4, and the inner side of seat ring 2 waterexit end is connected with crown 3 by bolt; Crown 3 intermediate portion be above the cylinder-shaped bearing room 13 of a hollow, main turbine shaft 6 is installed in the bearing chamber 13 of crown 3 by pair of bearings 14, and the disk lateral part of crown 3 is by the internal link of bolt and seat ring 2 lower end; The lower end flange of worm gear room sidewall 4 and the upper end outer flange of draft tube 8 are bolted, and the upper flanges of worm gear room sidewall 4 is connected by the outside cylindrical of bolt with seat ring 3 lower end; Lower cover 7 is the class disc elements surrounding worm gear chamber body, and its lateral part is connected with draft tube 8 upper end inner flange by bolt; Turbine wheel 5 lateral part welding by blade 15 form oar grid, the retaining ring of a ring is welded in the outside of oar grid, and the wheel hub 16 in the middle part of turbine wheel 5 is connected with the bottom of bolt with main turbine shaft 6 by key; The intermediate portion of main turbine shaft 6 is installed in the cylinder-shaped bearing room 13 of crown 3 by pair of bearings 14, and the top of main turbine shaft 6 is connected with blower fan of cooling tower by key; The upper end inner flange of draft tube 8 is connected with lower cover 7 by bolt, and the upper end outer flange of draft tube 8 is by the lower end Flange joint of bolt and worm gear room sidewall 4, and the lower end flange of draft tube 8 is connected by the upper flanges of bolt with tail water connecting tube 9; The flange of four pant like connecting tubes 18 of tail water connecting tube 9 lower end is connected with cooling tower water distributor by bolt.
This directly drive in spiral case Fig. 2 of the ultra-low specific speed turbo machine of large-size water-cooling tower blower fan be employing 10 millimeters thick
Steel plate roll and form.Spiral case Fig. 2 is according to the scroll casing shape structure waiting the change of gradual change circular area, rotate a circle around main turbine shaft, and the deferent that these gradual changes such as grade are round bunch is positioned at apart from the cylndrical surface of main turbine shaft same distance; Immediately below spiral case Fig. 2 be one and be positioned at same turbine shaft cross section, wide ring water outlet, the lower end of this ring water outlet is welded with water outlet connecting end 11 under ring, waits the central diameter of distance with water outlet connecting end 11 under ring of the distance of center circle main turbine shaft of gradual change circle bunch, the central diameter of central diameter that seat ring 2 leads grid, turbine wheel 5 oar grid is identical.
This directly drives seat ring Fig. 3 in the ultra-low specific speed turbo machine of large-size water-cooling tower blower fan by the class annulus tubular Cast Steel structures of two coaxial, middle welding, 18 stators 12, and inside the upper end part that seat ring Fig. 3 injects spiral case part, flow channels is horn mouth shape.
This directly drives stator 12 Figure 11 of the ultra-low specific speed turbo machine in large-size water-cooling tower blower fan, adopts a kind of three-dimensional twisted airfoil structure that high tensile steel makes through fine finishing, chord length 338 millimeters outside the wing, outside the wing relatively
Thickness 9.6%, relative camber 8.2% outside the wing, wing outer inlet established angle 29 degree, wing outer outlets established angle 14 degree, outside the wing, leading edge adopts major semi axis 59 millimeters, the part elliptical that semi-minor axis is 16.5 millimeters, and outside the wing, trailing edge is sharp edge; Chord length 295.5 millimeters inside the wing, relative thickness 12.3% inside the wing, relative camber 14.3% inside the wing, wing inner inlet port established angle 44 degree, outlet laying angle 14 degree, inside the wing, leading edge adopts major semi axis 59 millimeters, the part elliptical that semi-minor axis is 18 millimeters, inside the wing, trailing edge is sharp edge.
This directly drives in turbine wheel Fig. 6 of the ultra-low specific speed turbo machine of large-size water-cooling tower blower fan is a discoid runner, adopts common iron to make, is welded outside it by 23 blades 15 forming oar grid, and oar grid are web distribution.
This directly drives blade 15 Figure 12 in turbine wheel Fig. 6 of the ultra-low specific speed turbo machine of large-size water-cooling tower blower fan, adopt a kind of three-dimensional twisted airfoil structure that high tensile steel makes through fine finishing, chord length 258.2 millimeters outside the wing, relative thickness 10.8% outside the wing, relative camber 37.9% outside the wing, wing outer inlet established angle 50.3 degree, wing outer outlets established angle-18.6 is spent, wing outer outlets established angle-18.6 is spent, outside the wing, leading edge adopts major semi axis 9.86 millimeters, the part elliptical that semi-minor axis side is 6.36 millimeters, outside the wing, trailing edge is sharp edge; Chord length 248.9 millimeters inside the wing, relative thickness 11.2% inside the wing, relative camber 40.85% inside the wing, wing inner inlet port established angle 37.6 degree, outlet laying angle-21.5 is spent, and inside the wing, leading edge adopts major semi axis 9.13 millimeters, the part elliptical that semi-minor axis side is 5.94 millimeters, inside the wing, trailing edge is sharp edge.
This directly drive in draft tube Fig. 9 of the ultra-low specific speed turbo machine of large-size water-cooling tower blower fan adopt thickness be 10 millimeters general steel plate make, its madial wall is cylindrical shape, outer side wall is frustoconic shape, upper end is welded together medial and lateral by flange, lower end is also welded together medial and lateral by flange, forms the surface structure of frustoconic shape; The inside and outside sidewall of draft tube Fig. 9 is welded into an entirety by 8 tail water airflow fences 17, ring water outlet section is divided into eight fan-shaped go out the water surface.
This water inlet section directly driving tail water connecting tube Figure 10 of the ultra-low specific speed turbo machine in large-size water-cooling tower blower fan is the ring being divided into eight water inlet sections, every two fan-shaped water inlet end faces are merged into the water inlet end face of a pant like connecting tube 18, the water outlet end face of four pant like connecting tubes 18 is all deformed into standard pipe, be connected with water distributor respectively, adopt 10 millimeters of general steel plates to make.
Claims (8)
1. one kind is directly driven the ultra-low specific speed turbo machine in large-size water-cooling tower blower fan, comprise inlet segment, work done section and tail water section three part composition, inlet segment is made up of spiral case (1), seat ring (2), work done section is made up of crown (3), turbine chamber sidewall (4), turbine wheel (5), main turbine shaft (6), lower cover (7), and tail water section is made up of draft tube (8), tail water connecting tube (9); It is characterized in that the water intake (10) of spiral case (1) is connected by standard flange with intake tower circulating water main, the ring water-out manners of the axis of the water outlet employing of spiral case (1), this ring water outlet connecting end (11) is connected by the feed-water end of bolt with seat ring (2); The outside of the waterexit end of seat ring (2) is connected by the upper flanges of bolt with worm gear room sidewall (4), and the inner side of seat ring (2) waterexit end is connected with crown (3) by bolt; It is the cylinder-shaped bearing room (13) of a hollow above crown (3) intermediate portion, main turbine shaft (6) is installed in the bearing chamber (13) of crown (3) by pair of bearings (14), and the disk lateral part of crown (3) is by the internal link of bolt and seat ring (2) lower end; The lower end flange of worm gear room sidewall (4) and the upper end outer flange of draft tube (8) are bolted, and the upper flanges of worm gear room sidewall (4) is connected by the outside cylindrical of bolt with seat ring (3) lower end; Lower cover (7) is a class disc element surrounding worm gear chamber body, and its lateral part is connected with draft tube (8) upper end inner flange by bolt; Turbine wheel (5) lateral part welding by blade (15) form oar grid, the retaining ring of a ring is welded in the outside of oar grid, turbine wheel (5) middle part wheel hub (16) be connected with the bottom of bolt with main turbine shaft (6) by key; The intermediate portion of main turbine shaft (6) is installed in the cylinder-shaped bearing room (13) of crown (3) by pair of bearings (14), and the top of main turbine shaft (6) is connected with blower fan of cooling tower by key; The upper end inner flange of draft tube (8) is connected with lower cover (7) by bolt, the upper end outer flange of draft tube (8) is by the lower end Flange joint of bolt and worm gear room sidewall (4), and the lower end flange of draft tube (8) is connected by the upper flanges of bolt with tail water connecting tube (9); The flange of four pant like connecting tubes (18) of tail water connecting tube (9) lower end is connected with cooling tower water distributor by bolt.
2. the ultra-low specific speed turbo machine directly driven in large-size water-cooling tower blower fan according to claim 1, it is characterized in that described spiral case (1) is according to the scroll casing shape structure waiting the change of gradual change circular area, rotate a circle around main turbine shaft, the deferent that these gradual changes such as grade are round bunch is positioned at apart from the cylndrical surface of main turbine shaft same distance; Immediately below spiral case (1) be one and be positioned at same turbine shaft cross section, wide ring water outlet, the lower end of this ring water outlet is welded with water outlet connecting end (11) under ring, waits the central diameter of distance with water outlet connecting end (11) under ring of the distance of center circle main turbine shaft of gradual change circle bunch, the central diameter of central diameter that seat ring (2) leads grid, turbine wheel (5) oar grid is identical.
3. the ultra-low specific speed turbo machine directly driven in large-size water-cooling tower blower fan according to claim 1, it is characterized in that described seat ring (2) is columnar structured by the class of two coaxial, middle welding stator (12), inside the upper end part of seat ring (2) reeve spiral case part, flow channels is horn mouth shape.
4. the ultra-low specific speed turbo machine directly driven in large-size water-cooling tower blower fan according to claim 1, it is characterized in that described stator (12) is a kind of three-dimensional twisted airfoil structure, relative thickness 9.6% outside the wing, relative camber 8.2% outside the wing, wing outer inlet established angle 29 degree, wing outer outlets established angle 14 degree, outside the wing, leading edge adopts major semi axis 59 millimeters, the part elliptical that semi-minor axis is 16.5 millimeters, outside the wing, trailing edge is sharp edge; Relative thickness 12.3% inside the wing, relative camber 14.3% inside the wing, wing inner inlet port established angle 44 degree, outlet laying angle 14 degree, inside the wing, leading edge adopts major semi axis 59 millimeters, and the part elliptical that semi-minor axis is 18 millimeters, inside the wing, trailing edge is sharp edge.
5. the ultra-low specific speed turbo machine directly driven in large-size water-cooling tower blower fan according to claim 1, it is characterized in that described turbine wheel (5) is a discoid runner, be welded by the blade (15) forming oar grid outside it, oar grid are web distribution.
6. the ultra-low specific speed turbo machine directly driven in large-size water-cooling tower blower fan according to claim 1, it is characterized in that described blade (15) is a kind of three-dimensional twisted airfoil structure, relative thickness 10.8% outside the wing, relative camber 37.9% outside the wing, wing outer inlet established angle 50.3 degree, wing outer outlets established angle-18.6 is spent, and outside the wing, leading edge adopts major semi axis 9.86 millimeters, the part elliptical that semi-minor axis side is 6.36 millimeters, outside the wing, trailing edge is sharp edge; ; Relative thickness 11.2% inside the wing, relative camber 40.85% inside the wing, wing inner inlet port established angle 37.6 degree, outlet laying angle-21.5 is spent, and inside the wing, leading edge adopts major semi axis 9.13 millimeters, and the part elliptical that semi-minor axis side is 5.94 millimeters, inside the wing, trailing edge is sharp edge.
7. the ultra-low specific speed turbo machine directly driven in large-size water-cooling tower blower fan according to claim 1, the madial wall that it is characterized in that described draft tube (8) is cylindrical shape, outer side wall is frustoconic shape, upper end is welded together medial and lateral by flange, lower end is also welded together medial and lateral by flange, forms the surface structure of frustoconic shape; The inside and outside sidewall of draft tube (8) is welded into an entirety by 8 tail water airflow fences (17), ring water outlet section is divided into eight fan-shaped go out the water surface.
8. the ultra-low specific speed turbo machine directly driven in large-size water-cooling tower blower fan according to claim 1, it is characterized in that the water inlet section of described tail water connecting tube (9) is the ring being divided into eight water inlet sections, every two fan-shaped water inlet end faces are merged into the water inlet end face of a pant like connecting tube (18), the water outlet end face of four pant like connecting tubes (18) is all deformed into standard pipe, is connected respectively with water distributor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN103498749A (en) * | 2013-09-27 | 2014-01-08 | 河海大学 | Small-sized mixed-flow pump turbine for low water head pumped storage power station |
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