CN106437857A - Spiral channel type steam turbine and steam turbine equipment - Google Patents
Spiral channel type steam turbine and steam turbine equipment Download PDFInfo
- Publication number
- CN106437857A CN106437857A CN201610943536.6A CN201610943536A CN106437857A CN 106437857 A CN106437857 A CN 106437857A CN 201610943536 A CN201610943536 A CN 201610943536A CN 106437857 A CN106437857 A CN 106437857A
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- Prior art keywords
- steam turbine
- rotary shaft
- steam
- rotor
- helical
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D1/00—Non-positive-displacement machines or engines, e.g. steam turbines
- F01D1/34—Non-positive-displacement machines or engines, e.g. steam turbines characterised by non-bladed rotor, e.g. with drilled holes
- F01D1/38—Non-positive-displacement machines or engines, e.g. steam turbines characterised by non-bladed rotor, e.g. with drilled holes of the screw type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/16—Arrangement of bearings; Supporting or mounting bearings in casings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
Abstract
The invention provides a spiral channel type steam turbine and steam turbine equipment, and relates to the technical field of steam turbines. According to the spiral channel type steam turbine, a cavity is formed in a steam turbine shell; a rotary shaft is mounted in the steam turbine shell in a pivotal manner and penetrates the steam turbine shell; a spiral rotor is located in the cavity and fixedly connected with the rotary shaft; a bottom plate and a spiral rotor sealing and rotor protection layer cooperate to form a sleeve with an opening in on end, wherein the sleeve wraps the outer side of the spiral rotor; the spiral rotor and the sleeve cooperate to form a spiral channel, and along the axis of the rotary shaft, the spiral channel comprises a first end and a second; in the direction of the axis of the rotary shaft, the first end is close to the bottom plate, and the second end is far away from the bottom plate; in the direction from the first end to the second end, the volume of the unit length of the spiral channel is gradually increased; a steam channel is arranged on the rotary shaft; and an exhaust pipeline is arranged on the steam turbine shell. According to the spiral channel type steam turbine, the steam channel structure is simpler, the overall turbine structure is simplified better, and the performance is more durable.
Description
Technical field
The present invention relates to steam turbine technology field, especially relate to a kind of screw path type steam turbine and steam turbine equipment.
Background technology
Steam turbine can be used as the prime mover generating electricity, and also can directly drive various pumps, blower fan, compressor and ship spiral shell
Rotation oar etc., it may also be used for low boiling working fluid turbine system.During producing electric energy, the steaming that boiler transmission is come by steam turbine
The energy of vapour is converted into the rotary power of mechanical work, is generated electricity by the generator being in transmission connection.
But traditional steam turbine that power plant uses, volume is heavy, and complex structure involves great expense.For example, power plant uses
Traditional steam turbine, including rotating part and stationary part in two sub-sections.Stationary part also known as stator, stator by enter vapour part,
The structure compositions such as cylinder, dividing plate and static cascade, packing and bearing.Cylinder in stationary part is the shell of steam turbine, and it is by vapour
The flow passage component of turbine and air separate, and the steam chest forming closing inside steam turbine is it is ensured that steam completes energy inside steam turbine
The transfer process of amount.The parts such as nozzle box, dividing plate, diaphragm housing ring are installed in cylinder；It is connected to into vapour, steam discharge outside cylinder, take out
The pipelines such as vapour., also known as rotor, rotor is by structure compositions such as main shaft, impeller, movable vane piece and shaft couplings for rotating part.Therefrom can see
Go out the complex structure of traditional steam turbine.
Additionally, the height of cylinder, intermediate pressure section are typically formed using very thick steel alloy or cast carbon steel, complex process cost
, there is inequality of the being heated drawback that cylinder body can be led to be easily deformed etc. in height；Rotor is typically formed using alloy steel forging overall processing,
Rotor after processing needs further to be finished and it is necessary in all of blade of fit on, carry out rotating test at full speed
Just can be arranged on steam turbine with after accurate dynamic balancing；The parts such as rotor bushing, impeller, axle envelope set, shaft coupling are all respectively
After processing, hot jacket is on notch cuttype main shaft, and adopts interference fit between each part and main shaft, in case uppermost leaf wheel etc. is because of centrifugation
Power and action of thermal difference cause loosening, and transmit moment with key；Forging is big, and processing technology has high demands, and the process-cycle is long, and forges greatly
Part difficult quality guarantee.It can be seen that the manufacturing process of traditional steam turbine and assembly technology complexity, assembly precision have high demands.
In addition, when steam turbine work, the high steam of entrance and each grade blade of steam turbine, are all perpendicular contact,
Especially last stage vane of steam turbine, the linear velocity of outer blade diameter is very high.If having water droplet composition in steam, water droplet vertical direction toward impact
Last stage vane of steam turbine, huge linear velocity and vertical direction toward impact are it is more likely that cause last stage vane of steam turbine fatigue even to damage.
If the vertical speed of steam carries the materials such as iron rust, iron sand and incrustation scale, enter in steam turbine and vertical direction toward impact blade,
The damage of blade, the especially exhaust stage blade of high-speed rotation will be led to.If the blade breaking is high back and forth in cylinder of steam turbine body
Speed is clashed into, and this very likely results in the whole machine of steam turbine and scraps, or even even more serious accident.There it can be seen that it is traditional
Steam turbine maintenance in use and maintenance procedures are complex, relatively costly and exhaust stage blade is fragile.
Traditional steam turbine due to the requirement to gas circulation passage, cause complicated integral structure, assembly precision to have high demands,
Maintenance in use and the problem that maintenance procedures are complex, manufacturing cost is high.It is thus desirable to providing a kind of air flue more simple
The steam turbine single, structure more simplifies, performance is more lasting.
Content of the invention
It is an object of the invention to provide a kind of screw path type steam turbine and steam turbine equipment, to solve existing steam turbine
Complex structure, manufacturing process are complicated, assembly technology has high demands, maintenance procedures are complicated and last stage vane of steam turbine is easily damaged
Technical problem.This spiral channel formula steam turbine is mainly used as the prime mover generating electricity, and also can directly drive various pumps, blower fan, compression
Machine and propeller for vessels etc., it may also be used for low boiling working fluid turbine system.
In a first aspect, the present invention provides a kind of screw path type steam turbine, including：Steam turbine shell, rotary shaft, spiral turn
Son, base plate, helical rotor sealing and rotor protection layer and blow-off line, wherein：
Described steam turbine shell is internally formed a cavity；Described rotary shaft is installed in described steam turbine shell and institute
State rotary shaft and run through described steam turbine shell；Described helical rotor is located in described cavity and affixed with described rotary shaft；Described
Base plate cooperatively forms one end open and is wrapped in outside described helical rotor with described helical rotor sealing and rotor protection layer
Sleeve, described helical rotor and described sleeve cooperatively form helical duct, and the axial line along described rotary shaft, and described spiral leads to
Road includes first end and the second end, along first end described in the direction of axis line of described rotary shaft near described base plate, described second
End is away from described base plate, and along described first end to described second extreme direction, the volume of described helical duct unit length is gradually
Increase；Described rotary shaft is provided with steam channel, described steam channel one end open on the end face of described rotary shaft, the other end
Opening is in the original position of described first end；
Described blow-off line is arranged on described steam turbine shell, positioned at the exit position at described second end, for by institute
The gas stating helical duct discharge is discharged.
Further, the ring road of described helical duct gradually increases along the size of described first end to described second extreme direction
Greatly.
Further, described helical rotor is multistage, starts the length direction along described rotary shaft from described base plate, afterwards one
The blade radius of the described helical rotor of level are more than the blade of helical rotor described in previous stage.
Further, also include for the steam inlet pipe road to described helical duct steam supply, described steam inlet pipe road and described rotation
Form docking at the end face opening of rotating shaft.
Further, described steam turbine shell includes base and Shang Gai, and described base and described upper lid have integral type knot
Structure；Or,
Described base is detachably connected with described upper lid.
Further, described rotary shaft and described steam turbine shell junction are provided with bearing, and described base is provided with
For fixing the bearing block of described bearing.
Further, described steam inlet pipe road and described rotation shaft connection place are provided with for preventing junction from leaking the first of vapour
Axle envelope, and described first axle envelope has integral structure with described steam inlet pipe road；Described rotary shaft is away from one end of described base plate
It is provided with the second axle envelope for preventing gas from discharging with described rotation shaft connection place from described bearing.
Further, the tail end of described rotary shaft one end away from described steam inlet pipe road is provided with thrust bearing, described only
Thrust bearing is used for limiting the axial location of described rotary shaft.
Further, Temperature-controlled appliance and pressure control equipment are also included, described Temperature-controlled appliance is used for detecting institute
State the temperature height in cavity, described pressure control equipment is used for detecting the pressure size in described cavity.
Second aspect, the present invention also provides a kind of steam turbine equipment, including any one proposing in such as technique scheme
Screw path type steam turbine.
The screw path type steam turbine that the present invention provides and steam turbine equipment can produce following beneficial effect：
The present invention provides a kind of screw path type steam turbine, including：Steam turbine shell, rotary shaft, helical rotor, base plate,
Helical rotor sealing and rotor protection layer and blow-off line, wherein：Steam turbine shell is internally formed a cavity；Rotary shaft pivot fills
In steam turbine shell and rotary shaft runs through steam turbine shell；Helical rotor is within the cavity and affixed with rotary shaft；Base plate
Cooperatively form one end open with helical rotor sealing and rotor protection layer and be wrapped in sleeve outside helical rotor, spiral turns
Son and sleeve cooperatively form helical duct, and the axial line along rotary shaft, and helical duct includes first end and the second end, along rotation
The direction of axis line first end of axle close to base plate, the second end away from base plate, and along first end to the second extreme direction, helical duct list
The volume of bit length is gradually increased；Rotary shaft is provided with steam channel, steam channel one end open on the end face of rotary shaft, separately
One end open is in the original position of first end；Blow-off line is arranged on steam turbine shell, positioned at the exit position at the second end, uses
Discharge in the gas discharging helical duct.During use, opening from rotation axial end for the steam enters and flows through steam channel
Enter the original position of the first end of helical duct；Because helical duct one end has base plate to stop, steam is merely able to from the other end
Go out, and the volume of helical duct unit length is gradually increased, the steam flowing into first end flows along helical duct, step by step
Pressure release, and promote helical rotor to rotate；Drive affixed with it rotary shaft rotation while helical rotor rotates, rotary shaft defeated
Go out and hold output kinetic energy, drive gen-set to generate electricity and export or drive other devices.The screw path type steamer that the present invention provides
Not only complete machine structure is simple for machine, small volume, light weight, maintenance and maintenance operation is simple, assembling and manufacturing process are simple, Er Qiezheng
Vapour flows along helical duct, and exhaust stage blade is hardly damaged, helical rotor long service life, thus the helical duct that the present invention provides
Formula steam turbine long service life.
Brief description
In order to be illustrated more clearly that the specific embodiment of the invention or technical scheme of the prior art, below will be to concrete
In embodiment the accompanying drawing of required use be briefly described it should be apparent that, drawings in the following description are the present invention
Some embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
These accompanying drawings obtain other accompanying drawings.
Fig. 1 is single step helical rotor structure in screw path type steam turbine provided in an embodiment of the present invention and steam turbine equipment
Schematic diagram；
Fig. 2 is that the screw path type steam turbine structure being provided with single step helical rotor provided in an embodiment of the present invention is illustrated
Figure；
Fig. 3 is two-stage screw rotor structure in screw path type steam turbine provided in an embodiment of the present invention and steam turbine equipment
Schematic diagram；
Fig. 4 is that the screw path type steam turbine structure being provided with two-stage screw rotor provided in an embodiment of the present invention is illustrated
Figure.
Icon：Cover on 101-；102- base；2- rotary shaft；201- steam channel；3- helical rotor；301-
One end；302- second end；4- base plate；The sealing of 5- helical rotor and rotor protection layer；6- blow-off line；7- steam inlet pipe road；
8- bearing；9- bearing block；10- first axle envelope；11- second axle envelope；12- thrust bearing.
Specific embodiment
Below in conjunction with accompanying drawing, technical scheme is clearly and completely described with the enforcement it is clear that described
Example is a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill
The every other embodiment that personnel are obtained under the premise of not making creative work, broadly falls into the scope of protection of the invention.
In describing the invention, it should be noted that term " " center ", " on ", D score, "left", "right", " vertical ",
The orientation of instruction such as " level ", " interior ", " outward " or position relationship are based on orientation shown in the drawings or position relationship, merely to
Be easy to describe the present invention and simplify description, rather than instruction or the hint device of indication or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.Additionally, term " first ", " second ",
" the 3rd " is only used for describing purpose, and it is not intended that indicating or hint relative importance.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or is integrally connected；Can
To be to be mechanically connected or electrical connection；Can be to be joined directly together it is also possible to be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.It should be appreciated that this place is retouched
The specific embodiment stated is merely to illustrate and explains the present invention, is not limited to the present invention.
In steam turbine equipment, steam turbine is requisite device.Steam turbine can be used as the prime mover generating electricity,
Various pumps, blower fan, compressor and propeller for vessels etc. can be directly driven, it may also be used for low boiling working fluid turbine system.Generate electricity
In system boiler pass through burning fuel, produce steam, steam by pipeline enter steam turbine air flue in, driving steam turbine turn
Son rotates, and turbine rotor drives coupled rotary shaft 2 to rotate after rotating, and the output end of rotary shaft 2 is connected with generator,
Drive electrical power generators, carry out electric power output.During electricity generation system is powered, steam turbine serves vital work
With the energy of steam is converted into the rotary power of output shaft by steam turbine, drives generator powered.
Additionally, steam turbine can directly drive various pumps, blower fan, compressor and ship spiral by the output end of its rotary shaft
Oar etc., it may also be used for low boiling working fluid turbine system.
The present invention provides a kind of steam turbine equipment, including any one the screw path type steamer proposing in technical scheme below
Machine.
As shown in Figure 1-2, the present invention provides a kind of screw path type steam turbine, including：Steam turbine shell, rotary shaft 2,
Helical rotor 3, base plate 4, helical rotor sealing and rotor protection layer 5 and blow-off line 6, wherein：
Steam turbine shell is internally formed a cavity；Rotary shaft 2 is installed in steam turbine shell and rotary shaft 2 runs through vapour
Turbine housing；Helical rotor 3 is within the cavity and affixed with rotary shaft 2；Base plate 4 and helical rotor sealing and rotor protection layer 5
Cooperatively form one end open and be wrapped in the sleeve in helical rotor 3 outside, helical rotor 3 and sleeve cooperatively form helical duct,
And the axial line along rotary shaft 2, helical duct includes first end 301 and the second end 302, along the direction of axis line of rotary shaft 2
One end 301 near base plate 4, the second end 302 away from base plate 4, and along first end the 301 to the second end 302 direction, helical duct unit
The volume of length is gradually increased；Rotary shaft 2 is provided with steam channel 201, and steam channel 201 one end open is at the end of rotary shaft 2
On face, another end opening is in the original position of first end 301；
Blow-off line 6 is arranged on steam turbine shell, positioned at the second end 302 exit position, for discharging helical duct
Gas discharge.
Specifically, during use, opening from rotary shaft 2 end face for the steam enters and flows through steam channel 201 and enters spiral
The original position of the first end 301 of passage；Because helical duct one end has base plate 4 to stop, steam is merely able to go out from the other end,
And the volume of helical duct unit length is gradually increased, the steam flowing into first end 301 flows along helical duct, lets out step by step
Pressure, and promote helical rotor 3 to rotate；The rotary shaft 2 affixed with it is driven to rotate while helical rotor 3 rotates, rotary shaft 2
Output end output kinetic energy, drives gen-set to generate electricity and exports or drive other devices.The screw path type vapour that the present invention provides
Not only complete machine structure is simple for turbine, small volume, light weight, maintenance and maintenance operation is simple, assembling and manufacturing process are simple, and
Steam flows along helical duct, and exhaust stage blade is hardly damaged, helical rotor 3 long service life, thus the spiral that the present invention provides
Channel-type steam turbine long service life.
It should be noted that the one end being formed with helical rotor sealing and rotor protection layer 5 by base plate 4 due to helical duct
The sleeve parcel of opening, and helical rotor 3 cooperatively forms helical duct with sleeve, enters helical duct the from steam channel 201
The high steam of one end 301, can only be flowed to the second end 302 direction along helical duct from first end 301.Because along first end
301 to the second end 302 direction, the volume of helical duct unit length is gradually increased, and high steam is flowing to by first end 301
During two ends 302, gradually pressure release forms exhaust steam, and steam does work to helical rotor 3, promotes its rotation in this process；
Exhaust steam after final pressure release is flowed out at the opening at the second end 302, the inside cavity that full steam turbine shell is formed.In order to protect
The security of card steam turbine, is provided with discharge duct, the exhaust steam after pressure release is discharged by discharge line on steam turbine shell
The inside of cavity.
It should be noted that after high steam enters into the first end 301 of helical duct, along the rotation rail of helical duct
Road carries out flowing, pressure release step by step, even if being mingled with for example inside high steam, the foreign matter such as water droplet, iron rust, iron sand and incrustation scale enters
To in the helical duct of screw path type steam turbine, also can discharge along helical duct, helical rotor 3 will not be caused larger
Injury.Helical rotor 3 long service life of the screw path type steam turbine that the present invention provides.
Because high steam enters into the first end 301 of helical duct by steam channel 201, so first end 301 is
Higher-pressure region；Because along first end the 301 to the second end 302 direction, the volume of helical duct unit length is gradually increased, high steam
Gradually pressure release during flowed to the second end 302 by first end 301, so the second end 302 is low-pressure area.
In addition, the sleeve that base plate 4 is sealed with helical rotor and rotor protection layer 5 is formed and helical rotor 3 and rotary shaft 2 phase
Mutually coordinate, the high-temperature steam entering higher-pressure region is closed in helical duct so as to can only not occur along helical duct flowing
The gas at other positions is revealed, and base plate 4 is sealed with helical rotor and rotor protection layer 5 needs to bear high steam and is applied to it
Power effect.Based on this, the material choosing base plate 4 with helical rotor sealing and rotor protection layer 5 is steel alloy, and to the two
Carry out thickening process, the maximum pressure of the high steam of specific thickness big I foundation entrance steam turbine is set.Preferably
Ground, choosing base plate 4 with helical rotor sealing and rotor protection layer 5 is double-decker.
In addition, helical rotor sealing and rotor protection layer 5 can be two-layer, one layer is adjacent for enclosing coil rotor 3
To form the sealing of helical duct, one layer is to wrap the knot being formed in some sealings with helical rotor 3 blade to the side of two blades
Shell body outside structure, this shell body and base plate 4 cooperatively form one end open and are wrapped in the sleeve in helical rotor 3 outside.
In order that the high steam of first end 301 is entered along first end the 301 to the second end 302 side by steam channel 201
To movement, the volume of helical duct unit length is gradually increased.
The method that the volume of helical duct unit length increases is made to be that the ring road of helical duct is along first end 301 to the second
The size holding 302 directions is gradually increased.
Specifically, as shown in Figure 1-2, the steam channel 201 that high steam passes through in rotary shaft 2 enters into helical duct
First end 301, all of high steam is all sealed in helical duct, and high steam acts on power on helical rotor 3.
The pressure that helical rotor 3 bears is equal to the product of pressure and lifting surface area, due to first end 301 be higher-pressure region ring road area non-
Often little, so lifting surface area is very little, the pressure that therefore at this, helical rotor 3 bears is just smaller；Afterwards, high steam is along spiral shell
Rotation passage constantly allowance for expansion, constantly does work and consumes pressure and energy；Through tens grades of even more spiral channel simultaneously
Along with the continuous decay of energy, the finally tail end discharge from the second end 302 of helical duct does not have the exhaust steam of pressure；Steam turbine
Exhaust steam in cavity is discharged and is condensed so as to enter into condenser by the blow-off line 6 on housing, carries out the profit of after-heat
With, and reduce and become condensed water and continue cycling through use.
Although along first end the 301 to the second end 302 direction, the ring road size of helical duct is gradually increased and can increase spiral
The volume of passage unit length, but the method is not unlimited.If the method that selection simply increases ring road size is come
Increase the volume of the unit length of helical duct, the length of the rotary shaft 2 affixed with helical rotor 3 will be made thin long, this shape
Under state, not only the intensity of rotary shaft 2 and rigidity requirement need to improve a lot, and the size of whole machine is very big.
Therefore in order to optimize the screw path type steam turbine of present invention offer further so as to adapt under high-power state
Use demand.As shown in Figure 3-4, helical rotor 3 is set to multistage, starts the length direction along rotary shaft 2 from base plate 4, and afterwards one
The blade radius of the helical rotor 3 of level are more than the blade of previous stage helical rotor 3.
It is two-stage that helical rotor 3 can be chosen, and previous stage helical rotor 3 and sleeve and rotary shaft 2 form high pressure cylinder, rear stage
Helical rotor 3 and partial sleeves and rotary shaft 2 composition low pressure (LP) cylinder；Or, can choose helical rotor 3 is three-level or even more stages.
Specifically, the blade of rear stage helical rotor 3 and the blade of previous stage helical rotor 3 have integral structure, and the two formation is whole
Individual helical rotor 3.The ring road size of the helical duct that the blade of rear stage helical rotor 3 is formed is also in compliance with upper level helical rotor
The ring road size variation rule of the helical duct that 3 blade is formed, that is, the ring road of helical duct is along first end 301 to the second end
The size in 302 directions is gradually increased.But the size of the initial ring road that rear stage helical rotor 3 is formed, need to be according to previous stage spiral shell
The radius of the blade of the volume of tail end ring road of gyrator 3 formation and rear stage helical rotor 3 determines after being calculated.
It should be noted that the blade angle of helical rotor 3 can affect flowing velocity in helical duct for the steam.In phase
In isostructural steam turbine, only change the blade angle of helical rotor 3, when the blade of helical rotor 3 and the center line of rotary shaft 2
Vertical direction angle big when, gas is fast by the speed of helical duct；When the blade of helical rotor 3 and the center of rotary shaft 2
The vertical direction angle hour of line, the speed that gas passes through helical duct is slow.
Further, since helical rotor 3 needs to contact high steam, and execute the core missions of whole steam turbine, choose spiral shell
The material of gyrator 3 is superior alloy steel.The helical rotor 3 of steam turbine is generally more than tens circles, and each of which blade is solely subjected to
Pressure differential in helical duct in front and back, so do not need very thick.But to be considered it as far as possible when designing and manufacture helical rotor 3
Surplus thickness, it is ensured that steam turbine spiral channel pressure, can control in the range of being perfectly safe completely.Strive for can accomplishing entirely
Turbine rotor disposably puts into, and spiral channel does not need to open and overhauled.
The screw path type steam turbine that the present invention provides also includes, for the steam inlet pipe road 7 to helical duct steam supply, entering vapour
Pipeline 7 docks with being formed at the end face opening of rotary shaft 2.
Specifically, steam inlet pipe road 7 is connected with steam channel 201 opening on rotary shaft 2 end face, the high pressure discharged from boiler
Steam passes sequentially through steam inlet pipe road 7 and steam channel 201, enters into the first end 301 of helical duct.
In addition, steam turbine shell includes base 102 and upper lid 101, base 102 has integral structure with upper lid 101；Or
Person,
Base 102 is detachably connected with upper lid 101.
And specifically, it is preferable to the base 102 of steam turbine shell is demountable structure with upper lid 101.Base 102 and upper lid 101
Demountable structure, be easy to manufacture, assembling and the maintenance of screw path type steam turbine.Because rotary shaft 2 is positioned over base 102
On, and the structures such as helical rotor 3, base plate 4, helical rotor sealing and rotor protection layer 5, overall weight are connected with rotary shaft 2
Larger, base 102 needs to choose stability and security to meet whole screw path type steam turbine for the thicker steel alloy.But
Because the weight in rotary shaft 2 is less than the weight in traditional steam turbine rotary shaft 2, the screw path type steam turbine that the present invention provides
Base 102 thickness be much smaller than base 102 thickness of traditional steam turbine.
Additionally, because for exhaust steam, upper lid 101 and the base after pressure release in the cavity of upper lid 101 and base 102 formation
102 are not contacted with high steam, more than cover 101 and select general steel or steel alloy, and upper lid 101 thickness can
Upper lid 101 thickness of far smaller than traditional steam turbine.In a word to sum up, compared with traditional steam turbine, the present invention provides
Screw path type steam turbine does not need to have the very thick steel alloy cylinder block of traditional steam turbine, the screw path type that the present invention provides
The weight of steam turbine and cost can reduce a lot.
Further, since the rotation of rotary shaft 2 high speed under the drive of helical rotor 3, rotary shaft 2 and steam turbine shell pivot dress
Place is susceptible to wear and tear, so installing bearing 8 in rotary shaft 2 with steam turbine shell junction, base 102 is provided for fix
The bearing block 9 of bearing 8.Bearing block 9 and base 102 can be integral type structure.
In addition, the high steam in order to prevent boiler from discharging is revealed with rotary shaft 2 junction in steam inlet pipe road 7,
This position is provided with for preventing junction from leaking the first axle envelope 10 of vapour, and the first axle envelope 10 has integral type with steam inlet pipe road 7
Structure, prevents the leakage of high steam；Additionally, in order to prevent the exhaust steam in the cavity of steam turbine shell formation from revealing, and inconvenient
Carry out discharge and the utilization of exhaust steam in blow-off line 6, rotary shaft 2 away from base plate 4 one end be provided with for prevent gas from
The second axle envelope 11 that bearing 8 is discharged with rotary shaft 2 junction.
In addition, in order to prevent rotary shaft 2 when rotating, there is rocking along centerline direction, rotary shaft 2 is away from steam inlet pipe
The tail end of the one end in road 7 is provided with thrust bearing 12, and thrust bearing 12 is used for limiting the axial location of rotary shaft 2, thus limiting
There is not axially and radially displacement in helical rotor 3.
The screw path type steam turbine that the present invention provides also includes Temperature-controlled appliance and pressure control equipment, temperature control
Equipment is used for the temperature height in test chamber, and pressure control equipment is used for the pressure size in test chamber.Temperature control sets
Standby and pressure control equipment can protect screw path type steam turbine equipment to carry out long-term and stable operating.
Finally it should be noted that：Various embodiments above only in order to technical scheme to be described, is not intended to limit；To the greatest extent
Pipe has been described in detail to the present invention with reference to foregoing embodiments, it will be understood by those within the art that：Its according to
So the technical scheme described in foregoing embodiments can be modified, or wherein some or all of technical characteristic is entered
Row equivalent；And these modifications or replacement, do not make the essence of appropriate technical solution depart from various embodiments of the present invention technology
The scope of scheme.
Claims (10)
1. a kind of screw path type steam turbine is it is characterised in that include：Steam turbine shell, rotary shaft, helical rotor, base plate, spiral shell
Gyrator sealing and rotor protection layer and blow-off line, wherein：
Described steam turbine shell is internally formed a cavity；Described rotary shaft is installed in described steam turbine shell and described rotation
Rotating shaft runs through described steam turbine shell；Described helical rotor is located in described cavity and affixed with described rotary shaft；Described base plate
Cooperatively form one end open and be wrapped in the set outside described helical rotor with the sealing of described helical rotor and rotor protection layer
Cylinder, described helical rotor and described sleeve cooperatively form helical duct, and the axial line along described rotary shaft, described helical duct
Including first end and the second end, along first end described in the direction of axis line of described rotary shaft near described base plate, described second end
Away from described base plate, and along described first end to described second extreme direction, the volume of described helical duct unit length gradually increases
Greatly；Described rotary shaft is provided with steam channel, and described steam channel one end open on the end face of described rotary shaft, open by the other end
Mouth is in the original position of described first end；
Described blow-off line is arranged on described steam turbine shell, positioned at the exit position at described second end, for by described spiral shell
The gas that rotation passage is discharged is discharged.
2. screw path type steam turbine according to claim 1 is it is characterised in that the ring road of described helical duct is along described
The size of first end to described second extreme direction is gradually increased.
3. screw path type steam turbine according to claim 2 is it is characterised in that described helical rotor is multistage, from institute
State the length direction that base plate starts along described rotary shaft, the blade radius of the described helical rotor of rear stage are more than described in previous stage
The blade of helical rotor.
4. screw path type steam turbine according to claim 1 is it is characterised in that also include for described helical duct
The steam inlet pipe road of steam supply, described steam inlet pipe road docks with being formed at the end face opening of described rotary shaft.
5. screw path type steam turbine according to claim 4 it is characterised in that described steam turbine shell include base and
Upper lid, described base and described upper lid have integral structure；Or,
Described base is detachably connected with described upper lid.
6. screw path type steam turbine according to claim 5 is it is characterised in that described rotary shaft and described steamer casing
Body junction is provided with bearing, and described base is provided with the bearing block for fixing described bearing.
7. screw path type steam turbine according to claim 6 is it is characterised in that described steam inlet pipe road and described rotary shaft
Junction is provided with for preventing junction from leaking the first axle envelope of vapour, and described first axle envelope has one with described steam inlet pipe road
Formula structure；Described rotary shaft is provided with for preventing gas from described bearing with described rotary shaft even away from one end of described base plate
Connect the second axle envelope that place discharges.
8. screw path type steam turbine according to claim 7 is it is characterised in that described rotary shaft is away from described steam inlet pipe
The tail end of the one end in road is provided with thrust bearing, and described thrust bearing is used for limiting the axial location of described rotary shaft.
9. the screw path type steam turbine according to any one of claim 1-8 is it is characterised in that also include temperature control
Control equipment and pressure control equipment, described Temperature-controlled appliance is used for detecting the temperature height in described cavity, described pressure control
Control equipment is used for detecting the pressure size in described cavity.
10. a kind of steam turbine equipment is it is characterised in that include the screw path type vapour as described in any one of claim 1-9
Wheel.
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| CN201610943536.6A CN106437857B (en) | 2016-11-01 | 2016-11-01 | The equipment of screw path type steam turbine and application screw path type steam turbine |
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| CN201610943536.6A CN106437857B (en) | 2016-11-01 | 2016-11-01 | The equipment of screw path type steam turbine and application screw path type steam turbine |
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| CN106437857B CN106437857B (en) | 2018-08-14 |
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| CN107420132A (en) * | 2017-06-15 | 2017-12-01 | 翁志远 | Rotor, steam turbine and the steam turbine equipment of multiple coil structure |
| CN108035775A (en) * | 2018-01-08 | 2018-05-15 | 翁志远 | Rotor, steam turbine and prime mover equipment of steam turbine |
| CN110017173A (en) * | 2019-05-15 | 2019-07-16 | 游涛 | A kind of turbine and engine |
| CN113243851A (en) * | 2019-05-23 | 2021-08-13 | 中山市金舜家庭用品有限公司 | Cleaning roller and rolling steam mop |
| US20220364507A1 (en) * | 2021-05-14 | 2022-11-17 | Anthony Howard Lawson | Turbine Comprising One or More Helical Structures and Use Thereof |
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| Publication number | Publication date |
|---|---|
| CN106437857B (en) | 2018-08-14 |
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