CN109681365A - A kind of hydraulic turbine with draft cone - Google Patents
A kind of hydraulic turbine with draft cone Download PDFInfo
- Publication number
- CN109681365A CN109681365A CN201811206578.7A CN201811206578A CN109681365A CN 109681365 A CN109681365 A CN 109681365A CN 201811206578 A CN201811206578 A CN 201811206578A CN 109681365 A CN109681365 A CN 109681365A
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- China
- Prior art keywords
- runner
- spiral case
- draft
- draft cone
- hydraulic turbine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
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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
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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
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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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- 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
- F03B3/186—Spiral or volute casings
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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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Hydraulic Turbines (AREA)
Abstract
The invention discloses a kind of hydraulic turbines with draft cone, it includes spiral case and draft tube with inner cavity, the draft tube is connected to so that forming water stream channel between the spiral case and draft tube with the water outlet on spiral case, runner is equipped in the spiral case, the runner and spiral case are rotatably assorted and the part of runner is located in water stream channel, it is characterized by: being equipped with drain water circuit in the runner, gap between the runner and spiral case is connected to through drain water circuit with water stream channel, so that the ponding between the runner and spiral case in gap is back in water stream channel through drain water circuit.The present invention provides a kind of hydraulic turbine with draft cone, and pressure reduction in the gap between runner and spiral case is made by way of drainage, to reduce the resistance of runner rotation, improves the service life of runner, reduces frequency of maintenance.
Description
Technical field
The present invention relates to the technical field of turbomachinery, a kind of specifically hydraulic turbine with draft cone.
Background technique
The hydraulic turbine is a kind of significant energy conversion equipment that water flow can be converted into mechanical energy, it is also in utilization of new energy resources
For the important core unit of water generating.The existing hydraulic turbine mainly includes spiral case, draft tube, runner, generator and peace
Loaded on the draft cone on runner, flowing water stream flows into from the water inlet of spiral case and forms high pressure water flow strikes after spiraling and accelerating
Runner is most discharged into draft tube after draft cone water conservancy diversion afterwards, drives runner rotation in the process, then drives hair by transmission shaft
Motor rotation power generation.Due to partially protruding into spiral case for runner, rotation is certainly existed in runner and spiral case rotation process
Gap, this will certainly make water flow enter in the gap of runner and spiral case, thus can generate a series of technical problem:
The first, lasting high pressure water flow, which will lead to, forms high pressure between runner and spiral case, improve the friction of runner rotation
Resistance.
The second, the impurity particle in water flow can be brought into the gap between runner and spiral case, and long-term accumulation will be led
The contact surface abrasion between runner and spiral case is caused, runner service life is influenced.
Third, lasting high pressure water flow can to remain a biggish axial thrust between runner and spiral case, because
So that the lasting biggish axial force of receiving of the bearing of runner, this certainly will will lead to the accelerated wear test of bearing for this meeting.
4th, draft cone needs to fasten by bolt and runner, and water wheels are chronically at wet environment, therefore bolt is easily
Corrosion, this brings inconvenience to the disassembly of draft cone in maintenance process and runner.
Certainly also have in the prior art and considered that sealing structure is arranged between runner and spiral case, but due to the hydraulic turbine
Use environment is to be chronically at low temperature, humidity, hyperbaric environment, therefore the sealing ring of General Purpose Rubber material is not only unable to satisfy pressure
Demand and easy aging breakage are big particularly with its maintenance cost for large-sized water turbine unit, it is clear that it is unfavorable for actual demand,
And the sealing element of special substance is not only at high cost, but also for large-sized water turbine unit the sealing element of its demand size also compared with
Greatly, therefore the sealing element of larger size its processing precision of products is relatively difficult to guarantee, and is also unfavorable for installing, even installation process
In assembly precision be also relatively difficult to guarantee.
In conclusion the existing hydraulic turbine still has above-mentioned technical problem in industry.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies: providing a kind of have and let out
The hydraulic turbine of water cone makes pressure reduction in the gap between runner and spiral case by way of drainage, turns to reduce
The resistance for taking turns rotation, improves the service life of runner, reduces frequency of maintenance.
For this purpose, it includes with inner cavity an object of the present invention is to provide a kind of hydraulic turbine with draft cone
Spiral case and draft tube, the draft tube are connected to so that forming water between the spiral case and draft tube with the water outlet on spiral case
Circulation road, the spiral case is interior to be equipped with runner, and the runner and spiral case are rotatably assorted and the part of runner is located in water stream channel,
It is characterized in that: being equipped with drain water circuit in the runner, the gap between the runner and spiral case is through drain water circuit and water stream channel
Connection, so that the ponding between the runner and spiral case in gap is back in water stream channel through drain water circuit.Pass through setting
Drain water circuit so as to make the pressure reduction between runner and spiral case in gap well, and the water flow of pressure release flows back again
It to water stream channel, is not only simple in structure reliably, and water flow can make full use of.It is set additionally by the axial direction of drain water circuit
Setting can be with the axial load power suffered by Balance rotary wheel, therefore can greatly reduce axial force suffered by shaft upper bearing (metal).
It is located in water stream channel on the runner and is equipped with draft cone, the draft cone is equipped with the company for connecting with runner
Socket part, the lateral wall of the interconnecting piece are equipped with external screw thread, and the draft cone is threadedly coupled by interconnecting piece with runner, described to let out
Connecting tube is equipped in water cone, the both ends of connecting tube are connected to drain water circuit and water stream channel respectively；The draft cone is away from connection
The center of the front end face in portion is recessed the first mounting groove, and the center of the interconnecting piece is recessed the second installation
Slot is equipped with a central through hole, passes through for the screw portion for bolt between first mounting groove and the second mounting groove, described
It is equipped with sealing cover in one in first mounting groove, surrounds to form a sealing between the interior sealing cover and the slot inner wall of the first mounting groove
Cavity, for accommodating the screw head part of bolt, the interior sealing cover is equipped with the row for detaching air in the first mounting groove
The top of air valve mouth, the interior sealing cover is equipped with external seal lid.
An example according to the present invention, the external seal lid include thermal insulation layer and welding layer, the welding layer and
The notch of one mounting groove is welded and fixed and seals first mounting groove, it is described it is heat-insulated be placed on interior sealing cover and welding layer it
Between.
An example according to the present invention, the cross-sectional area of the front end face are less than the cross-sectional area of rear end face, and
It is connected between the front end face and rear end face by guide face transition.
The rear end face of an example according to the present invention, the draft cone towards runner is equipped with groove, the connecting tube
It is connected to through groove with the drain water circuit in runner.It can make the mistake that screw thread is tightened between draft cone and runner by the way that groove is arranged
It is connected to connecting tube always with drain water circuit.
An example according to the present invention, the groove are ring structure.
An example according to the present invention, the groove is multiple, and the groove is arc-shaped structure, and whole is recessed
Slot circumferentially sequentially interval setting.The design of multiple grooves is that any drain water circuit and respective connecting tube pair can be made
It answers, thus when the change that the hydraulic pressure in different drain water circuits not can use connecting tube position simultaneously reaches the balance of stress.
An example according to the present invention is connected between two grooves of arbitrary neighborhood by link slot, the link slot
Cross-sectional area is less than the cross-sectional area of the groove.By setting link slot can to avoid partially connect blockage after cause
Pressure in corresponding groove continues higher, the i.e. shunting of realization partial high pressure.
An example according to the present invention, the draft tube include tail water supervisor and tail water elbow, the tail water master
Pipe is connected to by tail water elbow with the water outlet of spiral case.
An example according to the present invention, the spiral case include front shroud and back shroud, the front shroud and back shroud
Mutually close up the inner cavity to form spiral case.
An example according to the present invention, the spiral case is equipped with relief tube, between the relief tube and runner and spiral case
Gap connection.By the way that relief tube is arranged, high voltage protective can be played the role of, being situations such as generation pressure relief pipe blocks can
To realize pressure maintaining by relief tube.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Above-mentioned technical proposal has the following advantages that or the utility model has the advantages that firstly, is can be very good by drain water circuit so that turning
Pressure reduction between wheel and spiral case in gap, and the water flow of pressure release is back in water stream channel, and being not only simple in structure can
It leans on, and water flow can make full use of, secondly, the axial setting of the drain water circuit can be with the axial direction suffered by Balance rotary wheel
Load force, therefore axial force suffered by shaft upper bearing (metal) can be greatly reduced, thirdly, pass through interior sealing cover and external seal lid
Cooperation can make the fastening bolt protection effect between draft cone and runner good, be not easy to corrode, consequently facilitating in maintenance process
Disassembly, finally, connecting tube during draft cone being made to be threadedly coupled with runner by the groove design on draft cone
It can remain and be connected to drain water circuit, reduce the required precision of assembly difficulty and components.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of hydraulic turbine with draft cone of the invention.
Fig. 2 is the partial enlargement diagram in region " A " in Fig. 1.
Fig. 3 is the structural schematic diagram of draft cone in the present invention.
Fig. 4 is the elevational schematic view of draft cone in Fig. 3.
Fig. 5 is the elevational schematic view of another structure of draft cone in Fig. 3.
Wherein, 1, spiral case, 1.1, front shroud, 1.2, back shroud, 2, draft tube, 2.1, tail water supervisor, 2.2, tail water elbow,
3, water outlet, 4, runner, 5, drain water circuit, 6, transmission shaft, 7, draft cone, 7.1, front end face, 7.2, rear end face, 7.3, water conservancy diversion
Face, 8, groove, 9, connecting tube, 10, blade, 11, link slot, 12, relief tube, 13, seal block, 14, interconnecting piece, 15, first
Mounting groove, the 16, second mounting groove, 17, central through hole, 18, bolt, 19, interior sealing cover, 20, exhaust valve nozzle, 21, thermal insulation layer,
22, welding layer.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
Below with reference to the accompanying drawings it is described in detail a kind of hydraulic turbine with draft cone according to an embodiment of the present invention.
Embodiment one:
The present invention provides a kind of hydraulic turbine, it includes spiral case 1 and draft tube 2 as shown in Figure 1, the outside of the spiral case 1
Wall is equipped with water inlet, and the center of spiral case 1 is equipped with water outlet 3, the draft tube 2 be connected to the water outlet 3 of spiral case 1 so that
The pipeline obtained in the spiral case 1 is connected to form water stream channel with draft tube 2, and the pipeline in the spiral case 1 is in spiral shape, the snail
Shell 1 is equipped with runner 4, and runner 4 is rotatably assorted with spiral case 1, and the spiral case 1 is equipped with the mounting groove for installing runner 4, when turn
4 part of the runner 4 when in mounting groove that is rotatably assorted of wheel is located in water stream channel, passes through the flowing of water flow in water stream channel
Runner 4 is driven to rotate, so that the water flow in spiral case 1 can be converted into the mechanical energy of runner 4.It is equipped with and sluices in the runner 4
The water inlet end of pipeline 5, the drain water circuit 5 is connected to through the gap between runner 4 and mounting groove slot inner wall with water stream channel, is sluiced
The water outlet of pipeline 5 is connected to water stream channel, and it is right that the water stream channel is located at the institute of the gap between runner 4 and mounting groove slot inner wall
The pressure value for the position answered is greater than the pressure value that the water stream channel is located at position corresponding to the water outlet of drain water circuit 5, i.e.,
The water inlet end of drain water circuit 5 is connected to through the gap between runner 4 and mounting groove slot inner wall with the higher-pressure region of water stream channel, tapping pipe
The water outlet on road 5 is connected to the low-pressure area of water stream channel.Be equipped with a transmission shaft 6 in the spiral case 1, one end of transmission shaft 6 with turn
Wheel 4 is fixedly connected, and the kinetic energy of runner 4 is transferred to outside spiral case 1 from there through transmission shaft 6, for driving 6 other end of transmission shaft
Load movement, it can utilize transmission shaft 6 that the mechanical structure that connects on 6 other end of transmission shaft, such as band piston is driven to transport
Dynamic, drive electrical power generators etc..The runner 4 is equipped with a draft cone 7 being located in water stream channel, and the draft cone 7 is installed
The position corresponding to the pivot center of runner 4, the rear end face 7.2 of the draft cone 7 towards runner 4 is equipped with groove 8, described
Groove 8 is preferably ring structure, and the water outlet of the drain water circuit 5 in the runner 4 is connected to the groove 8 of annular, the sluicing
Several connecting tubes 9 are equipped in cone 7, one end of each connecting tube 9 is connected to groove 8, and the other end and water stream channel of connecting tube 9 connect
It is logical.The part being located in water stream channel on the runner 4 is equipped with several blades 10, week of whole blades 10 along draft cone 7
It is arranged to interval.
Embodiment two:
Its basic system is the same as example 1, and difference is: the draft cone 7 is towards setting on the rear end face 7.2 of runner 4
There are multiple arc-shaped grooves 8, the circumferentially sequentially interval setting of whole circular grooves 8, and arbitrary neighborhood two arc-shaped
It is connected between groove 8 by link slot 11, the cross-sectional area of the link slot 11 is less than the cross section face of circular groove 8
Product.Preferably, the cross-sectional area of the link slot 11 is equal to the cross-sectional area of 1/4 circular groove 8.The core of this design
Mind is so that single pressure relief pipe corresponds to a respective groove 8 on runner 4, thus corresponding respective connecting tube 9, and
Multiple connecting tubes 9 are not Parallel Design in runner 4, by connecting tube 9 be dislocatedly distributed and connecting tube 9 water outlet water flow
Angle design between injection direction and horizontal plane is to whole by means of the different adjustment runner 4 of hydraulic pressure in different connecting tubes 9
Dynamic balance.
Embodiment three:
Its basic system is identical as embodiment two, and difference is: the draft tube 2 includes tail water supervisor 2.1 and tail water
Bend pipe 2.2, the tail water supervisor 2.1 are connected to by tail water elbow 2.2 with the water outlet 3 of spiral case 1.
Example IV:
Its basic system is identical as embodiment three, and difference is: the spiral case 1 includes front shroud 1.1 and back shroud
1.2, the front shroud 1.1 and back shroud 1.2 surround to form spiral case 1.
Embodiment five:
Its basic system is identical as example IV, and difference is: the front shroud 1.1 of the spiral case 1 is equipped with relief tube 12,
Gap between the relief tube 12 and runner 4 and mounting groove slot inner wall is connected to.
Embodiment six:
Its basic system is identical as embodiment five, and difference is: the draft cone 7 is equipped with for connecting with runner 4
Interconnecting piece 14, the lateral wall of the interconnecting piece 14 are equipped with external screw thread, and the draft cone 7 passes through interconnecting piece 14 and 4 screw thread of runner
Connection.
Embodiment seven:
Its basic system is identical as embodiment six, and difference is: the draft cone 7 deviates from the front end face 7.1 of interconnecting piece 14
Center be recessed the first mounting groove 15, the center of the interconnecting piece 14 is recessed the second mounting groove 16, institute
It states and is equipped with a central through hole 17 between the first mounting groove 15 and the second mounting groove 16, for being passed through for the screw portion of bolt 18,
It is equipped with sealing cover 19 in one in first mounting groove 15, is closed between the interior sealing cover 19 and the slot inner wall of the first mounting groove 15
The cavity to form a sealing is enclosed, for accommodating the screw head part of bolt 18, the interior sealing cover 19 is equipped with for detaching first
The top of the exhaust valve nozzle 20 of air in mounting groove 15, the interior sealing cover 10 is equipped with external seal lid.
Embodiment eight:
Its basic system is identical as embodiment seven, and difference is: the cross-sectional area of the front end face 7.1 is less than rear end face
7.2 cross-sectional area, and connected between the front end face 7.1 and rear end face 7.2 by 7.3 transition of guide face.
Embodiment nine:
Its basic system is identical as embodiment seven, and difference is: the external seal lid includes thermal insulation layer 21 and welding layer
22, the notch of the welding layer 22 and the first mounting groove 15 is welded and fixed and seals first mounting groove 15, the thermal insulation layer
21 are placed between interior sealing cover 20 and welding layer 22.
Certainly it is equipped with seal block 13 between the front shroud 1.1 that can be seen that the runner 4 and spiral case 1 in attached drawing 2,
But since the ponding between runner 4 and spiral case 1 in gap can be by pressure relief pipe pressure release, for the essence of seal block 13
Degree requires relatively low, and the setting of this seal block 13 not only can reduce water inlet in gap by increasing leakproofness
Amount, to reduce the discharge pressure of pressure relief pipe, and seal block 13 can play the role of friction, only need when worn
Replace seal block 13.
What needs to be explained here is that in the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " cross
To ", " length ", " width ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top",
The orientation or positional relationship of the instructions such as "bottom" "inner", "outside", " clockwise ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark
Show that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as pair
Limitation of the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more, unless separately
There is clearly specific restriction.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
For a person skilled in the art, after reading above description, various changes and modifications undoubtedly be will be evident.
Therefore, appended claims should regard the whole variations and modifications for covering true intention and range of the invention as.It is weighing
The range and content of any and all equivalences, are all considered as still belonging to the intent and scope of the invention within the scope of sharp claim.
Claims (10)
1. a kind of hydraulic turbine with draft cone, it includes spiral case (1) and draft tube (2) with inner cavity, the draft tube
(2) it is connected to the water outlet (3) on spiral case (1) so that form water stream channel between the spiral case (1) and draft tube (2), institute
It states in spiral case (1) and is equipped with runner (4), the runner (4) is rotatably assorted with spiral case (1) and the part of runner (4) is logical positioned at water flow
In road, it is characterised in that: be equipped with drain water circuit (5) in the runner (4), the gap warp between the runner (4) and spiral case (1)
Drain water circuit (5) is connected to water stream channel, so that the ponding between the runner (4) and spiral case (1) in gap is through tapping pipe
Road (5) is back in water stream channel；
It is located in water stream channel on the runner (4) and is equipped with draft cone (7), the rear end face (7.2) of the draft cone (7) is equipped with
The lateral wall of interconnecting piece (14) for connecting with runner (4), the interconnecting piece (14) is equipped with external screw thread, the draft cone
(7) it is threadedly coupled by interconnecting piece (14) with runner (4), is equipped with connecting tube (9) in the draft cone (7), the two of connecting tube (9)
End is connected to drain water circuit (5) and water stream channel respectively；
The draft cone (7) is recessed the first mounting groove (15) away from the center of the front end face (7.1) of interconnecting piece (14),
The center of the interconnecting piece (14) is recessed the second mounting groove (16), first mounting groove (15) and the second mounting groove
(16) central through hole (17) are equipped between, are passed through for the screw portion for bolt (18), in first mounting groove (15)
Equipped with sealing cover (19) in one, surround to form a sealing between the interior sealing cover (19) and the slot inner wall of the first mounting groove (15)
Cavity, for accommodating the screw head part of bolt (18), the interior sealing cover (19) is equipped with for detaching the first mounting groove
(15) top of the exhaust valve nozzle (20) of interior air, the interior sealing cover (10) is equipped with external seal lid.
2. a kind of hydraulic turbine with draft cone according to claim 1, it is characterised in that: the external seal lid includes
The notch of thermal insulation layer (21) and welding layer (22), the welding layer (22) and the first mounting groove (15) is welded and fixed and described in sealing
First mounting groove (15), the thermal insulation layer (21) are placed between interior sealing cover (20) and welding layer (22).
3. a kind of hydraulic turbine with draft cone according to claim 2, it is characterised in that: the front end face (7.1)
Cross-sectional area is less than the cross-sectional area of rear end face (7.2), and passes through between the front end face (7.1) and rear end face (7.2)
Guide face (7.3) transition connection.
4. a kind of hydraulic turbine with draft cone according to claim 3, it is characterised in that: draft cone (7) direction
The rear end face (7.2) of runner (4) is equipped with groove (8), and the connecting tube (9) is through the drain water circuit in groove (8) and runner (4)
(5) it is connected to.
5. a kind of hydraulic turbine with draft cone according to claim 4, it is characterised in that: the groove (8) is ring
Shape structure.
6. a kind of hydraulic turbine with draft cone according to claim 4, it is characterised in that: the groove is arc-shaped
Structure, and the groove (8) is multiple, whole grooves (8) circumferentially sequentially interval setting.
7. a kind of hydraulic turbine with draft cone according to claim 6, it is characterised in that: two grooves of arbitrary neighborhood
(8) it is connected between by link slot (11), the cross-sectional area of the link slot (11) is less than the cross section face of the groove (8)
Product.
8. a kind of hydraulic turbine with draft cone according to claim 1, it is characterised in that: draft tube (2) packet
Tail water supervisor (2.1) and tail water elbow (2.2) are included, the tail water supervisor (2.1) passes through tail water elbow (2.2) and spiral case (1)
Water outlet (3) connection.
9. a kind of hydraulic turbine with draft cone according to claim 1, it is characterised in that: the spiral case (1) includes
Front shroud (1.1) and back shroud (1.2), the front shroud (1.1) and back shroud (1.2) mutually close up to form the interior of spiral case (1)
Chamber.
10. a kind of hydraulic turbine with draft cone according to claim 1, it is characterised in that: the spiral case (1) is equipped with
Relief tube (12), the relief tube (12) are connected to the gap between runner (4) and spiral case (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811206578.7A CN109681365B (en) | 2018-10-17 | 2018-10-17 | Water turbine with water discharge cone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811206578.7A CN109681365B (en) | 2018-10-17 | 2018-10-17 | Water turbine with water discharge cone |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109681365A true CN109681365A (en) | 2019-04-26 |
| CN109681365B CN109681365B (en) | 2020-07-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811206578.7A Active CN109681365B (en) | 2018-10-17 | 2018-10-17 | Water turbine with water discharge cone |
Country Status (1)
| Country | Link |
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| CN (1) | CN109681365B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1577882A (en) * | 1917-07-24 | 1926-03-23 | William Cramp & Sons Ship & En | Hydraulic turbine |
| JPH05195941A (en) * | 1992-01-20 | 1993-08-06 | Mitsubishi Heavy Ind Ltd | Water turbine draft tube structure |
| CN2172352Y (en) * | 1993-07-25 | 1994-07-20 | 黄国宏 | Hydrautic turbine revolving wheel with 2 impellers |
| CN202768220U (en) * | 2012-08-14 | 2013-03-06 | 山东森玛格德节能设备有限公司 | Water turbine runner fixing device |
| CN105090048B (en) * | 2015-07-17 | 2017-06-23 | 河海大学 | Micro- head flow velocity type turbine pump |
-
2018
- 2018-10-17 CN CN201811206578.7A patent/CN109681365B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1577882A (en) * | 1917-07-24 | 1926-03-23 | William Cramp & Sons Ship & En | Hydraulic turbine |
| JPH05195941A (en) * | 1992-01-20 | 1993-08-06 | Mitsubishi Heavy Ind Ltd | Water turbine draft tube structure |
| CN2172352Y (en) * | 1993-07-25 | 1994-07-20 | 黄国宏 | Hydrautic turbine revolving wheel with 2 impellers |
| CN202768220U (en) * | 2012-08-14 | 2013-03-06 | 山东森玛格德节能设备有限公司 | Water turbine runner fixing device |
| CN105090048B (en) * | 2015-07-17 | 2017-06-23 | 河海大学 | Micro- head flow velocity type turbine pump |
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| CN109681365B (en) | 2020-07-24 |
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