CN116717416A - Integrated pneumatic power output system for oscillating water column wave-electricity conversion - Google Patents

Integrated pneumatic power output system for oscillating water column wave-electricity conversion Download PDF

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Publication number
CN116717416A
CN116717416A CN202310917493.4A CN202310917493A CN116717416A CN 116717416 A CN116717416 A CN 116717416A CN 202310917493 A CN202310917493 A CN 202310917493A CN 116717416 A CN116717416 A CN 116717416A
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CN
China
Prior art keywords
turbine
air
hub
water column
oscillating water
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.)
Pending
Application number
CN202310917493.4A
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Chinese (zh)
Inventor
刘艳娇
彭爱武
黄铭冶
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Institute of Electrical Engineering of CAS
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Institute of Electrical Engineering of CAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Institute of Electrical Engineering of CAS filed Critical Institute of Electrical Engineering of CAS
Priority to CN202310917493.4A priority Critical patent/CN116717416A/en
Publication of CN116717416A publication Critical patent/CN116717416A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
    • F03B13/12—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy
    • F03B13/14—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy
    • F03B13/141—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy with a static energy collector
    • F03B13/142—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy with a static energy collector which creates an oscillating water column
    • 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
    • F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01D15/10—Adaptations for driving, or combinations with, electric generators
    • 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
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/12—Blades
    • F01D5/14—Form or construction
    • F01D5/141—Shape, i.e. outer, aerodynamic form
    • 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
    • F01D9/00—Stators
    • F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
    • F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
    • F01D9/041—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector using blades
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
    • H02K7/1807—Rotary generators
    • H02K7/1823—Rotary generators structurally associated with turbines or similar engines
    • H02K7/183—Rotary generators structurally associated with turbines or similar engines wherein the turbine is a wind turbine
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
    • 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
    • Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Abstract

The invention relates to an integrated pneumatic power output system for oscillating water column wave electricity conversion, and belongs to the technical field of wave energy power generation. The method specifically comprises the following steps: an air turbine system, a generator system, a plenum housing, a support structure, and the like. The air turbine system comprises a hub, wherein the hub is fixed with the air chamber shell through a supporting structure, turbine blades are uniformly arranged on a rotating wheel capable of rotating around the hub, and the outer sides of the turbine blades are fixedly connected with a motor rotor. Under the action of the reciprocating airflow, the turbine blades rotate unidirectionally and drive the motor rotor to move relative to the motor stator so as to generate electricity. The invention can solve the technical problems of low turbine conversion efficiency caused by poor shafting reliability and uneven reciprocating airflow of the conventional oscillating water column wave energy power generation system.

Description

Integrated pneumatic power output system for oscillating water column wave-electricity conversion
Technical Field
The invention relates to the technical field of wave energy power generation, in particular to an integrated pneumatic power output system for oscillating water column wave-electricity conversion.
Background
The wave energy is a green and clean high-grade offshore renewable energy source with abundant reserves and wide distribution, and the development and the utilization of the wave energy are urgently needed to provide green electric power for deep sea island reefs, ocean equipment platforms, ocean monitoring instruments and the like. The wave energy capturing system of the wave energy power generation device with the bent pipe oscillating water column after floating is a single floating body air chamber, no floating body structure moves relatively during operation, meanwhile, a pneumatic power output system (an air ventilation system and a power generator) is not directly impacted by seawater, the device structure is relatively simple, the reliability is high, the cost is low, and the wave energy capturing system is considered to be one of the most development prospect technologies in the current wave energy utilization field.
As shown in fig. 1, a conventional pneumatic power output system is arranged in a dashed frame, the lower part of a flow channel is communicated with seawater, the upper part of the flow channel is communicated with the external atmosphere, the seawater oscillates in a reciprocating manner, and the sea surface in the flow channel moves up and down to drive air to flow in a reciprocating manner to drive the pneumatic power output system to generate electricity. The actual gas and seawater are in one flow channel, the upper part can be generally called a gas chamber flow channel, and the lower part can be generally called a seawater flow channel. The basic principle is that the device shakes under the wave action, so that the water column in the seawater flow channel generates reciprocating oscillation, the pressure in the air chamber flow channel is driven to periodically change and the air flow flows reciprocally, and then the air turbine is driven to rotate unidirectionally and the coaxially connected generator is driven to generate electricity.
The pneumatic power output system rotates and moves along with the floating body in a multidimensional manner, so that the connecting shaft of the turbine and the generator bears higher gyroscopic force, and the risk of loosening or breaking of the shafting exists; in addition, the connecting shaft and the generator are positioned on one side of the turbine, so that the axial flow air flow deflects, the turbine inlet and outlet air flow is uneven, the reciprocating air flow is asymmetric, and the energy utilization rate of the turbine is reduced.
Therefore, in order to improve the reliability and the energy utilization rate of the oscillating water column type wave power generation device, it is highly desirable to propose a novel pneumatic power output system to solve the above problems.
Disclosure of Invention
In order to solve the technical problems of low turbine conversion efficiency caused by poor shafting reliability and uneven reciprocating airflow of a conventional oscillating water column wave energy power generation system, the invention provides an integrated pneumatic power output system for oscillating water column wave electricity conversion, which comprises the following components: an air turbine system, a generator system, a plenum housing, a support structure, and the like. The hub is fixed with the air chamber shell through the supporting structure, turbine blades are uniformly arranged on a rotating wheel capable of rotating around the hub, and the outer sides of the turbine blades are fixedly connected with the motor rotor. Under the action of the reciprocating airflow, the turbine blades rotate unidirectionally and drive the motor rotor to move relative to the motor stator so as to generate electricity.
In order to achieve the above purpose, the invention adopts the following technical scheme:
an integrated pneumatic power output system for oscillating water column wave electricity conversion comprises an air turbine system, a generator system, an air chamber shell and a supporting structure; the air turbine system and the generator system are of an integrated structure; the air turbine system comprises a hub, a rotating wheel, turbine blades and turbine guide vanes, the generator system comprises a motor stator and a motor rotor, a motor air gap is arranged between the inner side of the motor stator and the outer side of the motor rotor, and reciprocating air flow directly dissipates heat through the motor air gap; the hub is fixed with the air chamber shell through the supporting structure, turbine blades are uniformly arranged on the outer wall of the rotating wheel capable of rotating around the hub along the circumference, and the outer sides of the turbine blades are fixedly connected with the motor rotor; the wheel hub is rigidly fixed with the air chamber shell through a plurality of supporting structures; turbine guide vanes are uniformly arranged on two sides of each turbine blade along the circumference; under the action of the reciprocating airflow, the turbine blades rotate unidirectionally and drive the motor rotor to move relative to the motor stator so as to generate electricity.
Further, the air turbine system also comprises a diversion hub head, wherein the diversion hub head and the hub are integrated and positioned at the center of the air chamber flow channel; the middle section of the air chamber flow channel is a circular section, the air chamber flow channels on two sides shrink towards the middle section, and the air chamber shell of the shrink section and the diversion hub head together guide the air to the area of the turbine blade.
Further, the diversion hub head is a hemispherical body or a semi-elliptical body.
Further, the generator system further comprises a motor stator seal layer and a motor rotor seal layer; the outer side of the motor rotor is sealed by a motor rotor sealing layer; the motor stator is fixed on the air chamber shell, and the inner side of the motor stator is sealed by using a motor stator sealing layer.
Further, both the motor stator seal layer and the motor rotor seal layer use an epoxy material.
Further, a circular groove is formed in the center of the hub, and a rotating wheel is arranged in the circular groove.
Further, the section of the turbine blade is crescent, the inner side is a section of arc, the outer side is a section of elliptical arc, the arc is in smooth connection with the elliptical arc, one end of the turbine blade in the radial direction is fixed with the rotating wheel, and the other end of the turbine blade is fixed with the motor rotor.
Further, the turbine guide vane is of a plate structure, one section is an arc section, the other section is a straight section, and the straight section is adjacent to the turbine blade; the air flow led in or led out by the straight line segment is matched with the air flow on the adjacent side of the turbine blade.
The technical scheme of the invention has the following beneficial effects:
1. the air turbine system and generator system integrated structure of the invention eliminates a connecting shaft, has simple and compact structure, improves reliability and reduces mechanical loss. The air turbine has more blades and is fixedly combined with the motor rotor, so that the mechanical strength and the reliability are further improved.
2. After the conventional shaft continuous generator is canceled, the air flow at the inlet and outlet of the turbine is uniformly distributed, and the reciprocating air flow is symmetrical, so that the conversion efficiency of the variable-working-condition turbine and the output power quality are improved.
3. The high-speed airflow in the air turbine directly flows through the motor air gap, so that the heat dissipation of the generator system is facilitated.
Drawings
FIG. 1 is a schematic diagram of a conventional pneumatic power take-off system of the prior art;
FIG. 2 is a schematic diagram of an integrated pneumatic power take-off system for oscillating water column wave electricity conversion according to the present invention;
FIG. 3 is a schematic view of a turbine blade and turbine vane;
FIG. 4 is a left side cross-sectional view of an integrated pneumatic power take-off system for oscillating water column wave electricity conversion of the present invention;
fig. 5 is a schematic view of a support system.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
As shown in fig. 2-5, the integrated pneumatic power output system for oscillating water column wave-to-electricity conversion of the present invention comprises an air turbine system, a generator system, an air chamber housing 11 and a support structure 12.
The air turbine system includes: hub 1, guiding hub head 2, runner 3, turbine blade 4, turbine vane 5.
The generator system comprises a motor stator 6, a motor rotor 7, a motor air gap 8, a motor stator sealing layer 9 and a motor rotor sealing layer 10.
The diversion hub head 2 and the hub 1 are integrated and are positioned at the center of the air chamber flow passage. Wherein the middle section of the air chamber flow channel is a circular section, the air chamber flow channels at two sides shrink towards the middle section, and the air chamber shell 11 of the shrinking section and the guiding hub head 2 guide the air to the area of the turbine blade 4. The deflector hub head 2 is generally hemispherical or semi-elliptical.
The hub 1 is rigidly fixed to the air chamber housing 11 by a plurality of support structures 12.
The center position of the hub 1 is provided with a circular groove, a rotating wheel 3 capable of rotating around the hub 1 is arranged in the circular groove, turbine blades 4 are uniformly arranged on the outer wall of the rotating wheel 3 along the circumference, the section of each turbine blade 4 is crescent, the inner side of each turbine blade is a section of arc, the outer side of each turbine blade is a section of elliptical arc, the arc is smoothly connected with the elliptical arc, one end of each turbine blade 4 in the radial direction is fixed with the rotating wheel 3, and the other end of each turbine blade is fixed with a motor rotor 7.
The two sides of the turbine blade 4 are respectively and uniformly provided with turbine guide vanes 5 along the circumference, one section of the cross section of the turbine guide vane 5 is an arc section, the other section is a straight section, and the straight section is adjacent to the turbine blade 4. The gas flow introduced or led out of the straight line segment matches the gas flow on the adjacent side of the turbine blade 4. The turbine guide vane 5 can be of a fixed structure or of a structure capable of automatically adjusting the stagger angle along with the pressure of the air chamber so as to assist the air turbine to improve the variable-working-condition energy conversion efficiency.
The inside of the motor rotor 7 is fixedly installed with the turbine blade 4, the motor rotor 7 mainly comprises an iron core and a permanent magnet, and the outside of the motor rotor 7 is sealed by using a motor rotor sealing layer 10. The motor stator 6 is fixed to the air chamber housing 11, and is mainly composed of a stator core and a coil, and the inside of the motor stator 6 is sealed with a motor stator sealing layer 9. An epoxy material may be used for both the motor stator seal layer 9 and the motor rotor seal layer 10. The other surfaces of the motor are installed and sealed according to the standard of the normal motor. A motor air gap 8 is arranged between the inner side of the motor stator 6 and the outer side of the motor rotor 7, and the reciprocating air flow 13 can directly pass through the motor air gap 8, so that the heat dissipation of the generator system is facilitated.
The basic working principle of the invention is as follows: when the air flow flows from left to right (as shown in fig. 1), in the expiration stage, after flowing through the turbine guide vane 5 at the left side, the air flow drives the turbine blade 4 to rotate anticlockwise (seen from the left side), and then the air flow is discharged to the atmosphere through the turbine guide vane 5 at the right side, at this time, the motor rotor 7 fixed on the turbine blade 4 rotates anticlockwise along with the turbine blade 4, forms relative motion with the motor stator 6, forms induced electromotive force in the coil of the motor stator 6, and can supply the user load after the electric energy conversion of the converter. When the air flow moves from right to left, the turbine blade 4 also rotates counterclockwise (seen from left) and drives the generator system to generate electricity during the suction phase. I.e. under the action of the periodically reciprocating air flow 13, the turbine blade 4 drives the motor rotor 7 to rotate unidirectionally.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.

Claims (8)

1. An integrated pneumatic power output system for oscillating water column wave electricity conversion is characterized by comprising an air turbine system, a generator system, an air chamber shell and a supporting structure; the air turbine system and the generator system are of an integrated structure; the air turbine system comprises a hub, a rotating wheel, turbine blades and turbine guide vanes, the generator system comprises a motor stator and a motor rotor, a motor air gap is arranged between the inner side of the motor stator and the outer side of the motor rotor, and reciprocating air flow directly dissipates heat through the motor air gap; the hub is fixed with the air chamber shell through the supporting structure, turbine blades are uniformly arranged on the outer wall of the rotating wheel capable of rotating around the hub along the circumference, and the outer sides of the turbine blades are fixedly connected with the motor rotor; the wheel hub is rigidly fixed with the air chamber shell through a plurality of supporting structures; turbine guide vanes are uniformly arranged on two sides of each turbine blade along the circumference; under the action of the reciprocating airflow, the turbine blades rotate unidirectionally and drive the motor rotor to move relative to the motor stator so as to generate electricity.
2. The integrated pneumatic power take-off system for oscillating water column wave electricity conversion of claim 1, wherein said air turbine system further comprises a deflector hub head integrally formed with the hub at a central location of the air chamber flow channel; the middle section of the air chamber flow channel is a circular section, the air chamber flow channels on two sides shrink towards the middle section, and the air chamber shell of the shrink section and the diversion hub head together guide the air to the area of the turbine blade.
3. An integrated aerodynamic power delivery system for oscillating water column wave electricity conversion as defined in claim 2, wherein said deflector hub head is hemispherical or semi-elliptical.
4. An integrated aerodynamic power delivery system for oscillating water column wave electrical conversion as defined in claim 1, wherein said generator system further comprises a motor stator seal layer and a motor rotor seal layer; the outer side of the motor rotor is sealed by a motor rotor sealing layer; the motor stator is fixed on the air chamber shell, and the inner side of the motor stator is sealed by using a motor stator sealing layer.
5. An integrated aerodynamic power delivery system for oscillating water column wave electrical conversion as defined in claim 4, wherein the motor stator seal layer and the motor rotor seal layer are both made of epoxy resin material.
6. An integrated pneumatic power take-off system for oscillating water column wave electricity conversion as set forth in claim 1 wherein said hub is provided with a circular groove in a central location thereof, said circular groove having a rotor disposed therein.
7. The integrated pneumatic power output system for oscillating water column wave-to-electricity conversion according to claim 1, wherein the section of the turbine blade is crescent, the inner side is a section of circular arc, the outer side is a section of elliptical arc, the circular arc and the elliptical arc are smoothly connected, one end of the turbine blade along the radial direction is fixed with the rotating wheel, and the other end of the turbine blade is fixed with the motor rotor.
8. The integrated pneumatic power take-off system for oscillating water column wave electricity conversion of claim 1, wherein said turbine vane is of a plate-type construction, one segment being a circular arc segment and one segment being a straight segment, the straight segment being adjacent to a turbine blade; the air flow led in or led out by the straight line segment is matched with the air flow on the adjacent side of the turbine blade.
CN202310917493.4A 2023-07-25 2023-07-25 Integrated pneumatic power output system for oscillating water column wave-electricity conversion Pending CN116717416A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310917493.4A CN116717416A (en) 2023-07-25 2023-07-25 Integrated pneumatic power output system for oscillating water column wave-electricity conversion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310917493.4A CN116717416A (en) 2023-07-25 2023-07-25 Integrated pneumatic power output system for oscillating water column wave-electricity conversion

Publications (1)

Publication Number Publication Date
CN116717416A true CN116717416A (en) 2023-09-08

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Country Status (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117052588A (en) * 2023-10-11 2023-11-14 集美大学 Oscillating water column type wave energy power generation equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117052588A (en) * 2023-10-11 2023-11-14 集美大学 Oscillating water column type wave energy power generation equipment
CN117052588B (en) * 2023-10-11 2024-01-30 集美大学 Oscillating water column type wave energy power generation equipment

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