CN107605640B - A kind of Π type Cantilevered vertical shaft type trend hydraulic turbine - Google Patents
A kind of Π type Cantilevered vertical shaft type trend hydraulic turbine Download PDFInfo
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- CN107605640B CN107605640B CN201711078287.XA CN201711078287A CN107605640B CN 107605640 B CN107605640 B CN 107605640B CN 201711078287 A CN201711078287 A CN 201711078287A CN 107605640 B CN107605640 B CN 107605640B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The present invention provides a kind of Π type Cantilevered vertical shaft type trend hydraulic turbine, the upper end of main shaft is provided with flange, lower end is provided with watertight turntable, at least three arc plates are equidistantly provided in the circumferential direction of the watertight turntable, there are two aperture side plates for setting on each arc plate, top plate is provided between the end of two aperture side plates, top plate, arc plate, two aperture side plates constitute tower structure, the upper end of each tower structure is provided with blade seat, control motor is provided on blade seat, the output end of control motor is connected with sharf, load cell is provided on each sharf, the end of each sharf is connected with blade.Energy conversion efficiency of the present invention is high, starting performance is good, strong environmental adaptability, structure is simple, safeguards convenient for building with Attention problems, produces low with manufacturing cost, it the depth of water can work entirely, the electromechanical components such as generating set can be made to be located at the water surface or more, convenient for safeguarding, maintenance and operational management, be suitable for marine tidal-current energy and convert.
Description
Technical field
The present invention relates to a kind of Π type Cantilevered vertical shaft type trend hydraulic turbines, belong to hydraulic machine and hydraulic generator neck
Domain.
Background technique
Marine tidal-current energy is a kind of green renewable new energy of cleanliness without any pollution, has that reserves are big, distribution is wide, predictability is strong
The advantages that.Marine tidal-current energy is developed and used for alleviating energy shortage, environmental pollution is reduced, develops coastal and island economy, consolidate sea
It is anti-etc. to be of great significance.
The core apparatus that marine tidal-current energy utilizes mainly has horizontal axial type and perpendicular axis type according to its structure type for the hydraulic turbine.
Horizontal shaft water turbine easily realizes that pitch control is run, and has high energy conversion efficiency, design theory and technology relative maturity etc.
Advantage, but its submerged structure and sealing are complicated, generally require to add convection current reversing mechanism, and cavitation and blade vibration are asked at blade tip
Topic protrudes；Perpendicular axis type hydraulic turbine structure is relatively easy, flow to it is adaptable, it is of less demanding to the depth of water, be always research and answer
Hot spot type.The vertical-axis tide hydraulic turbine applied at present is mostly " H-type " and " Φ type " hydraulic turbine of fixed drift angle, impeller
Submerged structure it is relative complex, start velocity is high, and operating condition control is difficult, and energy conversion efficiency is low, and fishing net or sea grass etc. twine
It is difficult to overcome around problem, installation maintenance higher cost.For this purpose, a kind of " Π type " Cantilevered vertical shaft type trend water of invention
Turbine, the hydraulic turbine overcome the deficiency of the existing vertical-axis tide hydraulic turbine, have the advantages that
(1) blade wheel structure is in Π type, and overall structure is simple, is produced low with manufacturing cost.
(2) spoke for connecting blade and impeller spindle is located at the water surface or more, and spoke does not generate water resistance energy when wheel rotation
Amount dissipates, and the energy conversion efficiency of impeller is high.
(3) support arm waterborne and the Unique physical designs such as watertight turntable and underwater cantilever blade are used, blade is realized
The active control of drift angle further improves the energy conversion efficiency of the hydraulic turbine.
(4) active control for realizing the different operating conditions such as impeller starting, normal operation and brake, reduces opening for the hydraulic turbine
Dynamic flow velocity and overload risk, the adaptive capacity to environment of turbine-generator units are stronger.
(5) in addition to blade, all components are operated above positioned at the water surface, reduce the failure of watertight difficulty and the hydraulic turbine
Rate, is easily installed, safeguards, overhauling and operational management.
(underwater portion of 6 blades do not have spoke or other connecting elements, solves fishing net and sea grass winding is difficult to clean off
Problem, and it is low convenient for operations on the sea, long-term O&M costs such as blade installation, maintenance, maintenance and the removings of blade surface marine growth；
(7) cantilevered non-constant section, be similar to the design of iso-stress stright wing vane, the blade root side of a ship is long and thickness is larger, ensure that
The resistance to load-carrying ability of root of blade.
(8) main shaft, wheel disc, support arm, blade seat and blade, using structure design and work type of attachment is not had good mark, not only just
It is readily transported installation, Maintenance and Repair, additionally it is possible to realize the adjustment of impeller diameter.
It is found through retrieval, a kind of vertical axis tide is disclosed in the patent of invention file that publication No. is CN201010101286.4
Flow the impeller unit of generator.Including main shaft and wheel sections, spoke part and blade and blade coupling part.It is characterized in that:
Main shaft and wheel sections include main shaft, wheel disc, link slot, slot connecting hole；Spoke part include spoke plate, spoke plate connecting hole,
Limiting leg, angle adjustable bolt；Blade and blade coupling part include blade, fan-catcher, limit base；Main shaft and wheel sections are logical
It crosses connection bolt to connect with spoke part, spoke part is rotatedly connected with blade and blade coupling part.The present invention can adjust leaf
The pivot angle range of piece met the stream angle of attack or control blade can replace spoke part according to trend environment, change wheel rotation radius,
It is that a kind of structure is simple, installs, adjusts, changeing conveniently, it is reliable for operation, it is suitble to the impeller unit of engineer application, is used for marine tidal-current energy
Conversion.A kind of Π type Cantilevered vertical shaft type trend hydraulic turbine involved in the invention patent is with publication No.
There are following differences for the hydraulic turbine disclosed in the patent of invention file of CN201010101286.4:
1, blade wheel structure form is different.For the invention patent using the impeller of Π type cantilevered paddle, blade is root
The side of a ship is grown up, the small trapezoidal variable cross-section stright wing vane of taper chord length, and underwater portion is without main shaft, and not only energy loss is small, energy conversion
It is high-efficient, the winding problem of fishing net, sea grass etc. is also overcomed, manufacturing cost is low, facilitates installation, maintenance, maintenance and operation
Management.
2, blade control mode is different.Publication No. is water wheels disclosed in the patent of invention file of CN201010101286.4
The blade of machine is the mode of the adaptive passive control angle of attack, and impeller energy transfer efficiency is relatively low, it has not been convenient to Operating condition adjustment, ring
Border adaptability is weak, is not easy to the operation control and management of the hydraulic turbine.The invention patent uses watertight turntable, support arm, electric power
The design such as control system, can be changed, active control hydraulic turbine condition and operation, the environment of the hydraulic turbine with active control attack angle of blade
Adaptability is stronger, and energy conversion efficiency is higher.
3, publication No. is that turbine impeller disclosed in the patent of invention file of CN201010101286.4 is immersed under water,
And the hydraulic turbine involved in the invention patent, in addition to blade, other electromechanical components are respectively positioned on the water surface or more, reduce watertight
The technical difficulty of processing, improves reliability, is easily installed, safeguards, overhauling and operational management.
4, the hydraulic turbine disclosed in the patent of invention file that publication No. is CN201010101286.4 is to determine impeller diameter
The hydraulic turbine, and the invention patent uses the structure design of support arm, blade seat etc., and impeller diameter adjustment may be implemented.
5, turbine blade disclosed in the patent of invention file that publication No. is CN201010101286.4 be etc. aerofoil profiles, etc.
Section stright wing vane, and the cantilever blade of the invention patent is trapezoidal change aerofoil profile, variable cross-section stright wing vane, enhances root of blade
Anti- load-carrying ability.
The vertical-axis tide hydraulic turbine involved in the invention patent is in main shaft set-up mode, blade construction form and setting
Mode, attack angle of blade control mode etc. and water disclosed in the patent of invention file that publication No. is CN201010101286.4
Turbine there are significantly different, and with hydraulic turbine phase disclosed in patent of invention file that publication No. is CN201010101286.4
Than the hydraulic turbine involved in the invention patent is improving energy conversion efficiency, the property tieed up, controllability, and reducing watertight technology
Significant effect is all achieved in terms of difficulty and O&M cost, a kind of Π type cantilevered involved in the invention patent is vertical thus
The axis trend hydraulic turbine is entirely different with the hydraulic turbine disclosed in the patent of invention file that publication No. is CN201010101286.4
's.
Summary of the invention
It is that one kind can be controlled actively the purpose of the invention is to provide a kind of Π type Cantilevered vertical shaft type trend hydraulic turbine
Attack angle of blade processed, the rotation using trend kinetic energy efficiency power generation with the good property tieed up, reliability and operating condition controllability
Rotary impeller mechanical device.
The object of the present invention is achieved like this: the upper end of main shaft is provided with flange, lower end is provided with watertight turntable 2,
At least three arc plates are equidistantly provided in the circumferential direction of the watertight turntable 2, aperture side plate there are two settings on each arc plate, two
Top plate is provided between the end of a aperture side plate, top plate, arc plate, two aperture side plates constitute tower structure, in each frame
The upper end of formula structure is provided with blade seat, and control motor is provided on blade seat, and the output end for controlling motor is connected with sharf,
Load cell is provided on each sharf, the end of each sharf is connected with blade, also sets up in the watertight turntable 2
There are charge power supply and blade control single chip computer, the control motor is connected with blade control single chip computer respectively with load cell.
The invention also includes structure features some in this way:
1. the number of the arc plate is 3-6.
2. being provided with a T-type seat on each aperture side plate, a stretcher is provided between two neighboring T-type seat.
3. the blade is the ratio between unequal section stright wing vane, blade tip chord length, blade root chord length, span of foil and impeller diameter
For 1:2:20:a, wherein a is 20~30.
4. the upper surface of the tower structure is parallel to the horizontal plane, the angle between lower end surface and horizontal plane is 10 °.
Compared with prior art, the beneficial effects of the present invention are: the invention patent the technical problem to be solved is that offers
A kind of starting performance is good, high conversion efficiency, has the preferably property tieed up, operation controllability and environmental suitability, be readily produced manufacture,
Transport installation, Maintenance and Repair and operational management are suitble to the high-performance water turbine of marine tidal-current energy conversion without complicated watertight technique.
A kind of Π type Cantilevered vertical shaft type trend hydraulic turbine of the invention, by trend impact vanes sharf, blade seat,
Support arm, watertight turntable and main shaft transmitting, drive electrical power generators, the kinetic energy of trend are converted to electric energy.The present invention has starting
Performance is good, high conversion efficiency, and the property tieed up is good, and controllable degree is high, is readily produced manufacture, transport installation, Maintenance and Repair and operation pipe
The features such as managing, being not necessarily to complicated watertight technique generates electricity suitable for marine tidal-current energy.Charge power supply of the invention directly utilizes tidal power generating
The electricity that machine issues charges, and blade control single chip computer is for judging vane stress and planning attack angle of blade variation, by connecing in real time
It receives and feedback signal control attack angle of blade changes.Control the signal that motor receives blade control single chip computer, band movable vane piece and blade
Axis rotates in blade seat.Load cell will be fed back to blade control single chip computer for perceiving vane stress by force signal.
Blade control single chip computer, control motor, load cell are powered by charge power supply.
Detailed description of the invention
Fig. 1 is a kind of Π type Cantilevered vertical shaft type trend hydraulic turbine structure schematic overview of the invention；
Fig. 2 is watertight turntable structure schematic diagram of the invention；
Fig. 3 is support arm structure schematic diagram of the invention；
Fig. 4 is blade construction schematic diagram of the invention；
Fig. 5 is electric control system composition schematic diagram of the invention；
In figure: 1, main shaft；2, watertight turntable；3, flange；4, motor is controlled；5, T-type seat；6, U-shaped ear；7, unequal section is straight
Wing blade；8, blade upper flange；9, blade lower flange；10, blade seat；11, sharf supports；12, arc plate；13, aperture side plate；
14, top plate；15, adjusting rod；16, sharf；17, load cell；18, charge power supply；19, blade control single chip computer；22, spiral shell
Rasp bar.
Specific embodiment
Present invention is further described in detail with specific embodiment with reference to the accompanying drawing.
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4 and Fig. 5, the invention patent mainly include main shaft 1, watertight turntable, support arm (or wheel
Spoke), blade and electric control system etc..The main shaft 1 works more than the water surface, and the main shaft 1 is used to transmit rotating mechanical energy,
Drive electrical power generators；The watertight turntable is for carrying support arm, blade and electric control system etc.；Watertight turntable is sealing living
Cavity, side are equipped with support arm connecting hole, and for connecting support arm of living, inside is equipped with charge power supply, blade control single chip computer.The branch
Arm is frame structure, for directly carrying blade；The blade 7 is unequal section stright wing vane, for turning the kinetic energy of trend
It is changed to rotating mechanical energy；The electric control system changes for active control blade drift angle, and then controls hydraulic turbine operation.Institute
1 upper end of main shaft is stated equipped with flange 3, for connecting other rotary shafts and watertight turntable 2；Threaded connection is provided on the watertight turntable
Hole, for connecting support arm of living；The support arm include 1 block of arc plate, 12,2 pieces of aperture side plate 13 and 1 piece top plates 14, and by arc plate with
The connection living of watertight turntable；The blade is fixed on support arm by sharf support 11, and sharf 16 and blade 7 pass through on blade
Flange 8 and blade lower flange 9 connect；The electric control system includes charge power supply 18, blade control single chip computer 19, control electricity
Machine 4, load cell 17.Charge power supply, blade control single chip computer are carried in the watertight turntable；The arc plate of the support arm is opened
Hole side plate and top plate are welded to connect, and form frame structure, and the upper surface of tower structure of support arm is straight, are equipped with blade seat and are connected
Hole, lower perspective plane and horizontal plane are at 10 degree of angles；The sharf is equipped with load cell, controls blade by control motor 4
And sharf rotates in blade seat 10, actively changes drift angle.Work is connected with T-type seat 5 on the aperture side plate of support arm, by stretcher
Two neighboring T-type seat 5 is connected, realizes the structural strengthening of cantilevered support arm；The blade is unequal section stright wing vane 7, blade tip
Aerofoil profile is NACA0018, and blade root aerofoil profile is NACA0024, continuously excessive along length direction.Blade tip chord length and blade root chord length, leaf
The ratio between piece length and impeller diameter are 1:2:20:(20~30)；The blade bearing seat and support arm, can be with by bolt connection living
Realize the adjustment of impeller diameter.It according to load cell data on main shaft 1, is handled through single-chip microcontroller, Real-time Feedback, by control motor
The variation of 4 driving blade drift angles, optimizes hydraulic turbine operation, actively realizes operating conditions.Trend impacts vanes sharf, blade
Seat, support arm, watertight turntable and main shaft 1 transmit, and drive electrical power generators, the kinetic energy of trend is converted to rotating mechanical energy.
The main shaft 1 is the steel cylinder profile shaft for being coated with anti-decaying paint, and upper end weldering is connected with upper flange, and lower end and watertight turntable weld
It connects, main shaft 1 is connected by the way that upper flange and other main shafts 1 are living.It is located at the water surface or more when the main shaft 1 works.
The watertight turntable is the steel sealing wheel disc for being coated with anti-decaying paint, and side is uniformly provided with multiple groups support arm connecting screw hole,
Every group of support arm connecting screw hole is 4, the connection living for the arc plate with support arm.Middle position is equipped with charging electricity in watertight turntable
Source, blade control single chip computer.
The support arm includes 1 block of arc plate, 2 blocks of aperture side plates and 1 piece of top plate.One end of 2 blocks of aperture side plates and arc plate
Inside is welded to connect, and the inside of the other end and top plate is welded to connect, and forms frame structure.The arc plate outer side surface and watertight turn
The fitting of disk sidewall outer, and pass through screw hole and bolt connection living.Multiple blade seat connecting screw holes are provided with above the aperture side plate,
Side is provided with trapezoidal hole.It is straight above the aperture side plate, below lateral projection horizontal by 10 degree of angles.The aperture of the support arm
Be respectively equipped with 1 T-type seat 5 on the side of side plate, connected between two neighboring T-type seat 5 by 1 stretcher, to cantilevered support arm into
Row structural strengthening.Each stretcher is made of 2 U-shaped ears, 6,2 threaded rod 22 and 1 piece adjusting rods 15, is adjusted by rotation
The tensioning degree of pole control stretcher.The upper surface of described each support arm passes through 4 blade seat connecting screw holes, 1 blade of connection living
Seat 10.Blade seat connecting screw hole on support arm is porous design, and the adjustment of impeller diameter is realized by the adjustment of blade seat position.
The blade is to become aerofoil profile unequal section stright wing vane, and blade tip aerofoil profile is NACA0018, and blade root aerofoil profile is
NACA0024, it is continuously excessive along length direction.Blade tip chord length, blade root side of a ship length, span of foil, the ratio between impeller diameter are 1:
2:20:(20~30).Root of blade is welded with sharf, and blade is fixed in blade seat by sharf, and in blade seat certainly
By rotating, blade seat is adjustable along support arm upper position.Work is connected with 1 load cell on the every sharf, for surveying
Vane stress is measured, and feeds back to blade control single chip computer.
The electric control system includes 1 charge power supply, 1 blade control single chip computer, 3 control motors 4 (according to leaf
Depending on the piece number), 3 load cells (depending on the number of blade).The electric control system is controlled for perceiving vane stress
Attack angle of blade variation processed, and then control the operating condition and operation of impeller；The charge power supply and blade control single chip computer are arranged in water
Close turntable bosom position, with the connection living of watertight turntable, charge power supply is charged using the electric energy of trend conversion.Each dynamometry passes
Sensor work is connected on the sharf of each blade, and for acquiring vane stress signal, and Real-time Feedback controls monolithic to blade
Machine, the movement of planning control motor 4.Each work of control motor 4 is connected on corresponding blade seat, and the shaft for controlling motor 4 is straight
It connects to live with sharf and connect, after the control signal of real-time reception blade control single chip computer, real-time control sharf is in blade seat
Rotation controls the variation of attack angle of blade, and then controls the work operating condition and operation of the hydraulic turbine.The blade control single chip computer, 3
Control 4,3 load cells of motor are powered by charge power supply.
A kind of Π type Cantilevered vertical shaft type trend hydraulic turbine impacts each vanes respectively sharf, leaf by trend
Bar, support arm and watertight turntable and main shaft 1 transmit, and drive electrical power generators, the kinetic energy of trend is converted to electric energy.
A kind of Π type Cantilevered vertical shaft type trend hydraulic turbine has starting performance good, high conversion efficiency, the property tieed up
Good, controllable degree is high, is readily produced, manufactures, installing and Maintenance and Repair, facilitates operational management, without spies such as complicated watertight techniques
Point generates electricity suitable for marine tidal-current energy.
A kind of Π type Cantilevered vertical shaft type trend hydraulic turbine concrete application and workflow according to the present invention:
A kind of Π type Cantilevered vertical shaft type trend hydraulic turbine can be 3-6 leaf form, as in Fig. 1-Fig. 5 structure and mode connect
It connects, and is fixed below floating platform or speciality ship, be connected with tidal current generator.In the presence of having trend, trend is in blade
On be further applied load, the load of blade transmits rotation torque by sharf, blade seat, support arm, watertight turntable and main shaft 1, will be damp
The kinetic energy of stream is converted to rotating mechanical energy, and then drives electrical power generators, and trend kinetic energy is finally converted to electric energy.
When tidal current speed or other environmental conditions change, suffered load changes on blade, on sharf
Load cell perceive vane stress, vane stress is passed into the blade control single chip computer in watertight turntable, according to blade
Control strategy in control single chip computer determines attack angle of blade variation strategy, forms control signal, plan vane control motor in real time
4 movement, the variation of real-time control attack angle of blade realize the real-time active optimal control of blade movement, and then realize hydraulic turbine work
The active control of condition and operation.
Claims (5)
1. a kind of Π type Cantilevered vertical shaft type trend hydraulic turbine, it is characterised in that: the upper end of main shaft is provided with flange, lower end is set
It is equipped with watertight turntable, at least three arc plates are equidistantly provided in the circumferential direction of the watertight turntable, are provided with two on each arc plate
A aperture side plate, top plate is provided between the end of two aperture side plates, and top plate, arc plate, two aperture side plates constitute frame-type knots
Structure is provided with blade seat in the upper end of each tower structure, control motor is provided on blade seat, controls the output end of motor
It is connected with sharf, load cell is provided on each sharf, the end of each sharf is connected with blade, the watertight
Charge power supply and blade control single chip computer are additionally provided in turntable, the control motor and load cell are controlled with blade respectively
Single-chip microcontroller connection；It is provided with a T-type seat on each aperture side plate, is provided with a stretcher between two neighboring T-type seat.
2. a kind of Π type Cantilevered vertical shaft type trend hydraulic turbine according to claim 1, it is characterised in that: the arc plate
Number is 3-6.
3. a kind of Π type Cantilevered vertical shaft type trend hydraulic turbine according to claim 1 or 2, it is characterised in that: the leaf
Piece is unequal section stright wing vane, and the ratio between blade tip chord length, blade root chord length, span of foil and impeller diameter are 1:2:20:a, wherein a
It is 20~30.
4. a kind of Π type Cantilevered vertical shaft type trend hydraulic turbine according to claim 1 or 2, it is characterised in that: the frame
The upper surface of rack and panel construction is parallel to the horizontal plane, the angle between lower end surface and horizontal plane is 10 °.
5. a kind of Π type Cantilevered vertical shaft type trend hydraulic turbine according to claim 3, it is characterised in that: the frame-type
The upper surface of structure is parallel to the horizontal plane, the angle between lower end surface and horizontal plane is 10 °.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711078287.XA CN107605640B (en) | 2017-11-06 | 2017-11-06 | A kind of Π type Cantilevered vertical shaft type trend hydraulic turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711078287.XA CN107605640B (en) | 2017-11-06 | 2017-11-06 | A kind of Π type Cantilevered vertical shaft type trend hydraulic turbine |
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| Publication Number | Publication Date |
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| CN107605640A CN107605640A (en) | 2018-01-19 |
| CN107605640B true CN107605640B (en) | 2019-11-12 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2271617Y (en) * | 1996-04-09 | 1997-12-31 | 李凤来 | Straight vane water flow motor |
| CN1439805A (en) * | 2003-02-27 | 2003-09-03 | 哈尔滨工程大学 | Self-adaptable straight-vaned pitch variable water turbine for tidal energy conversion |
| CN1484736A (en) * | 2001-11-09 | 2004-03-24 | 学校法人东海大学 | Integrated wind and water turbine and manufacturing method thereof |
| RU2307949C1 (en) * | 2006-08-30 | 2007-10-10 | Открытое акционерное общество "Малая Мезенская ПЭС" | Hydraulic power-generating plant |
-
2017
- 2017-11-06 CN CN201711078287.XA patent/CN107605640B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2271617Y (en) * | 1996-04-09 | 1997-12-31 | 李凤来 | Straight vane water flow motor |
| CN1484736A (en) * | 2001-11-09 | 2004-03-24 | 学校法人东海大学 | Integrated wind and water turbine and manufacturing method thereof |
| CN1439805A (en) * | 2003-02-27 | 2003-09-03 | 哈尔滨工程大学 | Self-adaptable straight-vaned pitch variable water turbine for tidal energy conversion |
| RU2307949C1 (en) * | 2006-08-30 | 2007-10-10 | Открытое акционерное общество "Малая Мезенская ПЭС" | Hydraulic power-generating plant |
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| CN107605640A (en) | 2018-01-19 |
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