CN112096465A - Streamline tunnel type turbine generator - Google Patents

Streamline tunnel type turbine generator Download PDF

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Publication number
CN112096465A
CN112096465A CN202011008032.8A CN202011008032A CN112096465A CN 112096465 A CN112096465 A CN 112096465A CN 202011008032 A CN202011008032 A CN 202011008032A CN 112096465 A CN112096465 A CN 112096465A
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CN
China
Prior art keywords
streamline
tunnel type
turbine
type turbine
generator
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
CN202011008032.8A
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Chinese (zh)
Inventor
黄若
郭文杰
贾合林
张磊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Konotebo (Beijing) Technology Co.,Ltd.
Original Assignee
Pingxiang Beijing Institute Of Technology High-Tech Research Institute
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 Pingxiang Beijing Institute Of Technology High-Tech Research Institute filed Critical Pingxiang Beijing Institute Of Technology High-Tech Research Institute
Priority to CN202011008032.8A priority Critical patent/CN112096465A/en
Publication of CN112096465A publication Critical patent/CN112096465A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01DNON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D15/00Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01D15/10Adaptations for driving, or combinations with, electric generators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01DNON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D11/00Preventing or minimising internal leakage of working-fluid, e.g. between stages
    • F01D11/02Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01DNON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D13/00Combinations of two or more machines or engines
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01DNON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/005Selecting particular materials
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01DNON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/16Arrangement of bearings; Supporting or mounting bearings in casings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01DNON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D25/00Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
    • F01D25/24Casings; Casing parts, e.g. diaphragms, casing fastenings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01DNON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D5/00Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/02Blade-carrying members, e.g. rotors
    • F01D5/04Blade-carrying members, e.g. rotors for radial-flow machines or engines
    • F01D5/043Blade-carrying members, e.g. rotors for radial-flow machines or engines of the axial inlet- radial outlet, or vice versa, type
    • F01D5/048Form or construction
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05DINDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00Materials; Properties thereof
    • F05D2300/20Oxide or non-oxide ceramics

Abstract

The invention discloses a streamline tunnel type turbine generator, which belongs to the field of turbine generators and comprises a streamline tunnel type turbine, a generator and a volute; the streamline tunnel type turbine is fixedly arranged on a shaft of the generator, and the volute is hermetically sealed and connected on the streamline tunnel type turbine. The streamline tunnel type turbine generator disclosed by the invention adopts the novel streamline tunnel type turbine, has higher strength and smaller leakage loss, and has the advantages of large streamline design optimization space, higher rotating speed adaptation and the like, so that the efficiency of the turbine can be further improved, the power density can be improved, and the size can be reduced.

Description

Streamline tunnel type turbine generator
Technical Field
The invention relates to the field of turbine generators, in particular to a streamline tunnel type turbine generator.
Background
The turbine generator is driven by a gas turbine, has the advantages of wide application range, high efficiency and the like, and can be generally used as a standby power station for supplying power in a power consumption peak period and as a movable emergency generator set. Nowadays, with the development of distributed power supply and multi-power technology, electric power systems are gradually replacing part of mechanical systems such as hydraulic pressure, air pressure and the like, and the demand for small and miniature high-rotation-speed generators is increasing.
Meanwhile, resource conservation and environmental friendliness are important prerequisites for current social development, and the significance of energy recovery is important in order to fully utilize energy and reduce carbon emission. The method has wide application prospect in the fields requiring waste gas energy recovery and energy cascade utilization, such as high-temperature waste gas energy recovery or cascade utilization of machines such as SOFC solid oxide fuel cells, internal combustion engines, gas turbines, steam turbines and the like.
However, there are many obstacles to the miniaturization of the turbine, such as the difficulty in arranging the blade cooling device due to the compact structure, the large leakage ratio due to the high relative height of the tip clearance, and the like.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to solve the technical problem of providing the streamline tunnel type turbine generator, which adopts a novel streamline tunnel type turbine as a closed type rotating machine, has higher strength and smaller leakage loss, and has the advantages of large streamline design optimization space, higher rotating speed adaptation and the like, thereby further improving the efficiency of the turbine, improving the power density and reducing the size. The high temperature resistance of the turbine can be further improved by installing a ceramic bushing in the streamline tunnel or manufacturing the integral ceramic turbine by using an advanced additive manufacturing technology, and even a cooling device does not need to be arranged.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a streamline tunnel type turbine generator which comprises a streamline tunnel type turbine, a generator and a volute; the streamline tunnel type turbine is fixedly arranged on a shaft of the generator, and the volute is hermetically sealed and connected on the streamline tunnel type turbine.
Preferably, the streamline tunnel type turbine is a closed turbine, the streamline tunnel type turbine comprises a plurality of streamline tunnels, namely runners for short, the center line of each streamline tunnel is a three-dimensional curve, each normal cross section of each streamline tunnel is one of a circle or an ellipse, when each normal cross section of each streamline tunnel is an ellipse, the projection of the long axis of the ellipse cross section on the xy plane (the axis of the rotor is the z axis) is perpendicular to the radius line of the center point of the ellipse cross section, the ratio of the long axis and the short axis of the ellipse cross section is kept unchanged, the inlet and outlet area of the runner is obtained according to the flow characteristics and the speed conditions of the rotating machine, and the cross section area is uniformly changed along the center line of the runner to form the complete streamline tunnel.
Preferably, the streamline tunnels are divided into a plurality of groups, inlets and outlets of the streamline tunnels are distributed on different radiuses of the streamline tunnel type turbine, and the streamline tunnels are uniformly distributed in the circumferential direction and are centrosymmetric about the rotor axis of the generator.
Preferably, a labyrinth sealing structure is arranged on the outer surface of the streamline tunnel type turbine, and the volute and the labyrinth sealing structure on the outer surface of the streamline tunnel type turbine are matched to form a stepped sealing structure.
Preferably, the volute is of an integral or split structure, the integral structure of the volute comprises an outlet circular tube and an inlet expansion tube, the outlet circular tube and the inlet expansion tube are integrally formed, and the cross section of the inlet expansion tube is square.
Preferably, the volute split structure comprises an outlet circular tube and an inlet expansion tube, the outlet circular tube and the inlet expansion tube are formed independently, an outlet extension section and an inlet extension section are arranged at an outlet and an inlet of the streamline tunnel type turbine respectively, the outlet circular tube is matched with the outlet extension section to form an outlet labyrinth seal structure, and the inlet expansion tube is matched with the inlet extension section to form an inlet labyrinth seal structure.
Preferably, the material of the streamlined tunnel type turbine includes, but is not limited to, ceramics, metals or other composite materials, and when the material of the streamlined tunnel type turbine is selected from ceramics, the high temperature resistance of the streamlined tunnel type turbine can be further improved by matching with advanced additive manufacturing technology.
Preferably, the generator shaft is supported for rotation by bearings including, but not limited to, electromagnetic bearings, ball bearings, air bearings, and the like.
The invention has the beneficial effects that:
the turbine adopts a streamline tunnel type structure, and compared with a vane type structure, the working wheel of the turbine has higher strength and is not easy to damage when meeting grinding particles, welding particles, gravels and the like; the higher structural strength also widens the material selection range, is beneficial to reducing the cost and controlling the weight, adopts materials such as ceramics and the like, and is particularly suitable for the high-temperature and corrosive medium environment of the turbine; when the volute is adopted, the stepped labyrinth seal structure fully utilizes the outer side conical surface of the streamline tunnel type turbine, has good sealing effect and greatly reduces the gap leakage loss; when the volute split structure is adopted, the manufacturing process of the volute can be greatly simplified, and the cost is reduced.
Drawings
FIG. 1 is a schematic view of a single stage turbine generator;
FIG. 2 is a schematic diagram of a single-sided turbine two-stage turbine generator;
FIG. 3 is a schematic structural diagram of an opposite-side turbine type two-stage turbine generator;
FIG. 4 is a meridian plane schematic view of a single-group flow passage flow line tunnel type turbine;
FIG. 5 is a meridian plane view of a simplified volute single-set flow channel streamline tunnel turbine.
In the figure:
1. a streamlined tunnel turbine; 2. a shaft; 3. a bearing; 4. a generator; 5. a nut; 6. a streamline tunnel; 7. a volute; 8. a stepped sealing structure; 9. an outlet circular tube; 10. an inlet expansion tube; 11. an outlet extension section; 12. an inlet extension section; 13. an outlet labyrinth seal structure; 14. an inlet labyrinth seal structure.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
Example 1
As shown in fig. 1, streamline tunnel type turbo generator includes streamline tunnel type turbine 1, generator 4 and volute 7, and streamline tunnel type turbine 1 is fixed to be set up on the axle 2 of generator 4, and volute 7 seals to cup joint on streamline tunnel type turbine, compares in traditional vane type turbine, and streamline tunnel type turbine 1's wheel wall thickness is bigger, and consequently streamline tunnel type turbine 1's structural strength is bigger, is meetting abrasive grain, welds grain, grit etc. and is not fragile.
In order to form the streamline tunnel 6, further, the streamline tunnel type turbine 1 is a closed turbine, the streamline tunnel type turbine 1 internally comprises a plurality of streamline tunnels 6, namely runners for short, the center line of the streamline tunnel 6 is a three-dimensional curve, each normal cross section of the streamline tunnel 6 is one of a circle or an ellipse, when each normal cross section of the streamline tunnel 6 is an ellipse, the projection of the major axis of the ellipse on an xy plane (the rotor axis is a z axis) is vertical to the radius line of the central point of the ellipse cross section, the ratio of the major axis to the minor axis of the ellipse cross section is kept unchanged, the inlet and outlet areas of the runners are obtained according to the flow characteristics and the speed conditions of a rotating machine, and the cross section areas are uniformly changed along the center line of the runners to form the complete streamline tunnel 6.
In order to better ensure the reasonability of the structure of the multiple groups of streamline tunnels 6, the streamline tunnels 6 are further divided into multiple groups, inlets and outlets of the streamline tunnels of each group are distributed on different radiuses of the streamline tunnel type turbine 1, and the multiple groups of streamline tunnels 6 are uniformly distributed in the circumferential direction and are centrosymmetric about the rotor axis of the generator 4.
In order to realize the external sealing of the streamline tunnel type turbine 1, further, as shown in fig. 4, the outer surface of the streamline tunnel type turbine 1 is provided with a labyrinth sealing structure, the volute 7 and the labyrinth sealing structure on the outer surface of the streamline tunnel type turbine 1 are matched to form a stepped sealing structure 8, and the stepped labyrinth sealing structure 8 makes full use of the outer side conical surface of the streamline tunnel type turbine 1, so that the streamline tunnel type turbine has a good sealing effect, and the gap leakage loss is greatly reduced.
In order to adapt to different manufacturing and installation conditions, further, the volute 7 is divided into an integral structure or a split structure, the integral structure of the volute 7 comprises an outlet circular tube 9 and an inlet expansion tube 10, the outlet circular tube 9 and the inlet expansion tube 10 are integrally formed, and in the turbine, the cross section of the inlet expansion tube 10 can be square for convenience in processing.
In order to simplify the structure of the volute 7 and facilitate the production and manufacture thereof, further, as shown in fig. 5, the volute 7 is divided into a structure including an outlet circular tube 9 and an inlet expansion tube 10, the outlet circular tube 9 and the inlet expansion tube 10 are formed independently, an outlet extension section 11 and an inlet extension section 12 are respectively arranged at an outlet and an inlet of the streamline tunnel turbine 1, the outlet circular tube 9 and the outlet extension section 11 are matched to form an outlet labyrinth seal structure 13, and the inlet expansion tube 10 and the inlet extension section 12 are matched to form an inlet labyrinth seal structure 14.
In order to expand the application range of the streamline tunnel type turbine 1, further, the material of the streamline tunnel type turbine 1 includes but is not limited to ceramic, metal or other composite materials, when the material of the streamline tunnel type turbine 1 selects ceramic, the high temperature resistance of the streamline tunnel type turbine 1 can be further improved by matching with the advanced additive manufacturing technology, because the structural strength of the streamline tunnel type turbine 1 is larger, the selection range of the material is wider, the material is favorable for screening the material with lower cost and smaller weight, and therefore, the cost and the weight of the streamline tunnel type turbine 1 are reduced.
To accommodate generators of different rotational speeds, further, the generator shaft 2 is supported for rotation by bearings 3, the bearings 3 including, but not limited to, electromagnetic bearings, ball bearings, air bearings, and the like.
Example 2
Compared with the single streamline tunnel type turbine 1 adopted in the embodiment 1, in the embodiment, two streamline tunnel type turbines 1 are adopted and are installed on the same side of a generator shaft 2, as shown in fig. 2, the two streamline tunnel type turbines 1 can be connected in parallel to increase the gas flow, and can also be connected in series to increase the expansion ratio.
Example 3
Compared with the embodiment 2 in which two streamlined tunnel turbines 1 are installed on the same side of a generator shaft 2, in the embodiment, two streamlined tunnel turbines 1 are installed on the opposite side of the generator shaft 2, as shown in fig. 3, the two streamlined tunnel turbines 1 can be connected in parallel to increase the gas flow rate, or connected in series to increase the expansion ratio.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims (8)

1. Streamline tunnel type turbine generator, its characterized in that:
the system comprises a streamline tunnel type turbine, a generator and a volute;
the streamline tunnel type turbine is fixedly arranged on a shaft of the generator, and the volute is hermetically sealed and connected on the streamline tunnel type turbine.
2. The streamlined tunnel turbine generator of claim 1, wherein:
the streamline tunnel type turbine is a closed turbine, the streamline tunnel type turbine is internally provided with a plurality of streamline tunnels, namely runners for short, the center line of each streamline tunnel is a three-dimensional curve, each normal cross section of each streamline tunnel is one of a circle or an ellipse, when each normal cross section of each streamline tunnel is an ellipse, the projection of the long axis of the ellipse cross section on the xy plane (the axis of a rotor is the z axis) is vertical to the radius line of the central point of the ellipse cross section, the ratio of the long axis and the short axis of the ellipse cross section is kept unchanged, the inlet and outlet areas of the runners are obtained according to the flow characteristics and the speed conditions of the rotating machinery, and the cross section areas are uniformly changed along the center line of the runners to form the complete streamline tunnel.
3. The streamlined tunnel turbine generator of claim 2, wherein:
the streamline tunnels are divided into a plurality of groups, inlets and outlets of the streamline tunnels are distributed on different radiuses of the streamline tunnel type turbine, and the streamline tunnels are uniformly distributed in the circumferential direction and are centrosymmetric about the axis of the rotor of the generator.
4. The streamlined tunnel turbine generator of claim 2, wherein:
the outer surface of the streamline tunnel type turbine is provided with a labyrinth sealing structure, and the volute and the labyrinth sealing structure on the outer surface of the streamline tunnel type turbine are matched to form a stepped sealing structure.
5. The streamlined tunnel turbine generator of claim 1, wherein:
the volute is of an integral or split structure;
the volute integral structure comprises an outlet circular tube and an inlet expansion tube, the outlet circular tube and the inlet expansion tube are integrally formed, and the cross section of the inlet expansion tube is square.
6. The streamlined tunnel turbine generator of claim 5, wherein:
the volute split structure comprises an outlet circular tube and an inlet expansion tube, the outlet circular tube and the inlet expansion tube are independently formed, and an outlet extension section and an inlet extension section are respectively arranged at an outlet and an inlet of the streamline tunnel type turbine;
the outlet circular tube is matched with the outlet extension section to form an outlet labyrinth seal structure;
the inlet expansion pipe is matched with the inlet extension section to form an inlet labyrinth seal structure.
7. The streamlined tunnel turbine generator of claim 1, wherein:
the material of the streamline tunnel type turbine comprises but is not limited to ceramic, metal or other composite materials, and when the material of the streamline tunnel type turbine is ceramic, the high-temperature resistance of the streamline tunnel type turbine can be further improved by matching with an advanced additive manufacturing technology.
8. The streamlined tunnel turbine generator of claim 1, wherein:
the generator shaft is supported for rotation by bearings including, but not limited to, electromagnetic bearings, ball bearings, air bearings.
CN202011008032.8A 2020-09-23 2020-09-23 Streamline tunnel type turbine generator Pending CN112096465A (en)

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CN202011008032.8A CN112096465A (en) 2020-09-23 2020-09-23 Streamline tunnel type turbine generator

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Application Number Priority Date Filing Date Title
CN202011008032.8A CN112096465A (en) 2020-09-23 2020-09-23 Streamline tunnel type turbine generator

Publications (1)

Publication Number Publication Date
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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2844298A1 (en) * 2002-09-05 2004-03-12 Electricite De France GAS TURBINE WITH RADIAL TURBINE WHEEL
CN201593480U (en) * 2010-01-11 2010-09-29 徐平 Wind turbine blade
US20110020109A1 (en) * 2009-07-23 2011-01-27 Jose Angel Acosta Peripheral Tunnels Propeller
WO2011042863A2 (en) * 2009-10-06 2011-04-14 Cmt Systems-Ceramic Micro Turbine Technologies Ltd Bladeless working wheel useful as a turbomachine component
CN103321748A (en) * 2013-06-19 2013-09-25 北京理工大学 Vertical combustion gas turbine
WO2014004240A1 (en) * 2012-06-25 2014-01-03 Borgwarner Inc. Exhaust-gas turbocharger
CN207145222U (en) * 2017-06-02 2018-03-27 武汉仁先机械设备有限公司 A kind of radial axle bearing used on new screw motor or screw pump
CN108150448A (en) * 2017-10-19 2018-06-12 浙江理工大学 A kind of method for designing impeller of not equidistant runner pump
CN109209520A (en) * 2018-09-13 2019-01-15 中国科学院工程热物理研究所 A kind of centripetal turbine back cavity leakage stream loss inhibition sealing technique

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2844298A1 (en) * 2002-09-05 2004-03-12 Electricite De France GAS TURBINE WITH RADIAL TURBINE WHEEL
US20110020109A1 (en) * 2009-07-23 2011-01-27 Jose Angel Acosta Peripheral Tunnels Propeller
WO2011042863A2 (en) * 2009-10-06 2011-04-14 Cmt Systems-Ceramic Micro Turbine Technologies Ltd Bladeless working wheel useful as a turbomachine component
CN201593480U (en) * 2010-01-11 2010-09-29 徐平 Wind turbine blade
WO2014004240A1 (en) * 2012-06-25 2014-01-03 Borgwarner Inc. Exhaust-gas turbocharger
CN103321748A (en) * 2013-06-19 2013-09-25 北京理工大学 Vertical combustion gas turbine
CN207145222U (en) * 2017-06-02 2018-03-27 武汉仁先机械设备有限公司 A kind of radial axle bearing used on new screw motor or screw pump
CN108150448A (en) * 2017-10-19 2018-06-12 浙江理工大学 A kind of method for designing impeller of not equidistant runner pump
CN109209520A (en) * 2018-09-13 2019-01-15 中国科学院工程热物理研究所 A kind of centripetal turbine back cavity leakage stream loss inhibition sealing technique

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Application publication date: 20201218