CN115949544A - Pipeline type axial flow turbine variable frequency power generation device - Google Patents
Pipeline type axial flow turbine variable frequency power generation device Download PDFInfo
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Abstract
The invention relates to the technical field of power generation devices, in particular to a pipeline type axial flow turbine variable-frequency power generation device, which comprises: an axial flow turbine wheel; an air intake flow guide mechanism; a power generation mechanism; a frequency converter; the medium in the fluid conduit pushes the first axial flow turbine blade wheel to rotate; a first rim generator rotor fixed on the rim of the movable blade rotates along with the movable blade and forms relative motion with a first rim generator stator, induced electromotive force is generated, and electric energy is input into a power grid after being rectified by a first axial flow turbine frequency converter; the fluid working medium then flows through the second axial flow turbine blade wheel to push the second axial flow turbine blade wheel to rotate; and the rotor of the second rim generator fixed on the rim of the movable blade rotates along with the rotor of the second rim generator and forms relative motion with the stator of the second rim generator, induced electromotive force is generated, and electric energy is rectified by a second axial flow turbine frequency converter and then is input into a power grid. The structure can overcome the problem that the shaftless turbine based on the pipeline structure in the prior art is insufficient in energy recovery performance of the corresponding fluid medium.
Description
Technical Field
The invention relates to the technical field of power generation devices, in particular to a pipeline type axial flow turbine variable-frequency power generation device applied to Newtonian fluid.
Background
In recent years, the types of turbines utilizing the pressure energy of the fluid working medium are widely applied, the structural types are also diversified, and electric power and power are provided for industrial production and people's life. In various industrial systems, pipeline structures are very common, and the energy utilization rate of the system can be further improved by fully recycling and utilizing fluid working medium energy in the pipeline, so that the research and development of a novel pipeline type turbine power generation system are very necessary. The pipeline type turbine power generation system is mainly applied to Newtonian fluid, and the Newtonian fluid refers to fluid in which the shear stress at any point and the shear deformation rate are in a linear function relationship and is called Newtonian fluid.
Among various turbine devices, shaftless turbines based on pipeline structures have been developed in recent years, and are being researched and applied in the fields of flow measurement, power supply of petroleum long-distance pipelines and the like. The working principle of the turbine is that the shaftless turbine is utilized to convert mechanical kinetic energy of working medium flowing in the pipeline into electric energy for further use by users on the premise of not influencing the overall performance and normal work of the pipeline. However, the existing shaftless turbine has the following problems:
1. the shaftless turbine mainly uses the impeller rim as a generator rotor, generates electric energy through the relative motion with the fixed annular stator, and has less utilization on the fluid kinetic energy at the central position of the pipeline, and the energy recovery performance still needs to be further improved.
2. The shaftless turbine mainly utilizes the kinetic energy of gas working medium flowing in the pipeline to generate electricity, and the further conversion and utilization of the energy in the gas working medium are less, so that a single-stage structure mode is usually adopted, and the structure above one stage is rare.
In order to improve the utilization efficiency of the fluid working medium energy of the turbo machinery, a pipeline type axial flow turbine variable frequency power generation device applied to newtonian fluid is needed by those skilled in the art, so that the energy recovery efficiency of the existing shaftless turbine to the fluid medium is improved.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the problem that the energy recovery performance of the shaftless turbine based on the pipeline structure is insufficient corresponding to the fluid medium in the prior art. Therefore, the invention provides a pipeline type axial flow turbine variable frequency power generation device, which comprises:
at least two axial flow turbine wheels, said axial flow turbine wheels comprising: a first axial flow turbine wheel and a second axial flow turbine wheel;
an air intake diversion mechanism comprising: the turbine guide hub is used for guiding fluid medium in the central position of the fluid pipeline to the axial flow turbine impeller so as to push the axial flow turbine impeller to rotate; the turbine guide wheel hub corresponds to the central shaft of the fluid pipeline in position, and one end of the turbine guide wheel hub facing to the fluid flowing direction of the fluid pipeline is of an arc-shaped structure;
the electricity generation mechanism, for at least two, with axial compressor turbine impeller cooperation transmission links to each other, electricity generation mechanism includes: a first rim generator rotor and a first rim generator stator disposed opposite the first axial flow turbine wheel, and a second rim generator rotor and a second rim generator stator disposed opposite the second axial flow turbine wheel;
the converter, for at least two, be used for with the electric energy that power generation mechanism sent turns into power frequency electric energy in order to satisfy the electric wire netting requirement, it includes: the first axial flow turbine frequency converter and the second axial flow turbine frequency converter are respectively arranged opposite to the first axial flow turbine impeller and the second axial flow turbine impeller;
the medium within the fluid conduit urges the first axial flow turbine vane wheel to rotate; the first rim generator rotor fixed on the movable blade rim rotates along with the movable blade rim and forms relative motion with the first rim generator stator, induced electromotive force is generated, and electric energy is input into a power grid after being rectified by the first axial flow turbine frequency converter;
the fluid working medium then flows through a second axial flow turbine blade wheel to push the second axial flow turbine blade wheel to rotate; and a second rim generator rotor fixed on the rim of the movable blade rotates along with the movable blade and forms relative motion with a second rim generator stator, induced electromotive force is generated, and electric energy is rectified by the second axial flow turbine frequency converter and then is input into a power grid.
Optionally, pipeline formula axial compressor turbine variable frequency power generation facility still includes:
at least two axial turbine vanes, comprising: a first axial flow turbine vane and a second axial flow turbine vane;
the first axial flow turbine vane is for directing fluid medium within the fluid conduit toward the first axial flow turbine wheel;
the second axial flow turbine vane is for directing fluid medium passing through the first axial flow turbine wheel toward the second axial flow turbine wheel.
Optionally, the first axial flow turbine guide vane is a turbine adjustable guide vane;
pipeline formula axial compressor turbine variable frequency power generation facility still includes: the adjusting guide vane, the adjusting control mechanism and the rotating shaft rod are in transmission connection with the adjusting control mechanism; the adjusting guide vane is in transmission connection with the rotating shaft, the adjusting control mechanism is used for driving the rotating shaft to rotate, and the rotating shaft drives the adjusting guide vane to rotate so as to adjust the opening degree of the adjusting guide vane in the first axial flow turbine guide vane and control the medium flow entering the turbine.
Optionally, the adjusting and controlling mechanism is an electric driving mechanism, and is electrically connected to the power grid to obtain electric energy from the power grid.
Pipeline formula axial compressor turbine variable frequency power generation device still includes:
and the outlet guide vane is arranged in the outlet direction of the second axial flow turbine guide vane and is used for adjusting the flow field so as to reduce the downstream flow loss of the pipeline type axial flow turbine variable frequency power generation device.
Optionally, the first axial turbine impeller and the second axial turbine impeller are respectively connected with the outer casing of the power generation device through impeller bearings in a rotating manner.
Optionally, the first axial turbine impeller and the second axial turbine impeller have different rotation speeds, and the first axial turbine impeller and the second axial turbine impeller change at any time according to an operation condition to ensure operation efficiencies of the first axial turbine impeller and the second axial turbine impeller.
Optionally, the first rim generator rotor is fixedly connected with the outer peripheral profile of the first axial flow turbine impeller in an integrated manner, so as to drive the first rim generator rotor to rotate; the first rim generator stator is fixedly arranged on the power generation device outer shell so as to generate electric energy through relative movement between the first rim generator rotor and the first rim generator stator;
the second rim generator rotor is fixedly connected with the outer peripheral profile of the second axial flow turbine blade wheel in an integrated mode so as to drive the second rim generator rotor to rotate; the second rim generator rotor is fixedly disposed on the power plant outer housing to generate electrical energy through relative movement between the second rim generator rotor and the second rim generator stator.
Optionally, the shape of the outlet guide vane of the axial flow turbine guide vane is designed according to a turbine outlet flow field, and the cross-sectional shape of the outlet guide vane is an NACA airfoil or a Clark airfoil to rectify the turbine outlet fluid to reduce flow loss.
Optionally, the power generation mechanism is an induction motor, a switched reluctance motor, a direct current motor, or a permanent magnet synchronous motor.
Optionally, the impeller bearing is a rolling bearing or an electromagnetic bearing.
The technical scheme of the invention has the following advantages:
1. the invention provides a pipeline type axial flow turbine variable frequency power generation device, which comprises:
at least two axial flow turbine wheels, said axial flow turbine wheels comprising: a first axial flow turbine blade wheel 5 and a second axial flow turbine blade wheel;
an air intake diversion mechanism comprising: the turbine guide hub is used for guiding fluid medium in the central position of the fluid pipeline to the axial flow turbine impeller so as to push the axial flow turbine impeller to rotate; the turbine flow guide hub corresponds to the central shaft of the fluid pipeline in position, and one end of the turbine flow guide hub facing to the fluid flowing direction of the fluid pipeline is of an arc-shaped structure;
0 electricity generation mechanism, for at least two, with axial compressor turbine impeller cooperation transmission links to each other, electricity generation mechanism includes: a first rim generator rotor and a first rim generator stator disposed opposite the first axial flow turbine blade wheel, and a second rim generator rotor and a second rim generator stator disposed opposite the second axial flow turbine blade wheel;
the converter, for at least two, be used for with the electric energy conversion that power generation mechanism sent satisfies the electric wire netting requirement with 5 with power frequency electric energy, it includes: the first axial flow turbine frequency converter and the second axial flow turbine frequency converter are respectively arranged opposite to the first axial flow turbine impeller and the second axial flow turbine impeller;
the medium within the fluid conduit urges the first axial flow turbine vane wheel to rotate; the first rim generator rotor fixed on the movable blade rim rotates along with the movable blade rim and is opposite to the first rim generator stator
Moving and generating induced electromotive force, and inputting electric energy into a 0 power grid after being rectified by the first axial flow turbine frequency converter;
the fluid working medium then flows through a second axial flow turbine blade wheel to push the second axial flow turbine blade wheel to rotate; and a second rim generator rotor fixed on the rim of the movable blade rotates along with the movable blade and forms relative motion with a second rim generator stator, induced electromotive force is generated, and electric energy is rectified by the second axial flow turbine frequency converter and then is input into a power grid.
5 the shaftless turbine in the invention mainly uses the impeller wheel rims of the at least two axial-flow turbine impellers as generator rotors, and further generates electric energy through the relative movement of the rim generator rotors and the rim generator stators. In addition, the air inlet guide mechanism can guide the fluid in the central position of the pipeline to the axial flow turbine impeller, so that the kinetic energy of the fluid in the central position of the pipeline is effectively utilized, and the energy utilization efficiency of the pipeline type axial flow turbine variable frequency power generation device is improved. Moreover, the present invention has at least two axial-flow turbine impellers, and the multi-stage shaftless turbine structure of the present invention can effectively utilize the kinetic energy of the fluid at the center of the pipeline.
2. The invention provides a pipeline type axial flow turbine variable frequency power generation device, which further comprises:
at least two axial turbine vanes, comprising: a first axial flow turbine vane and a second axial flow turbine vane;
the first axial flow turbine vane is for directing fluid medium within the fluid conduit toward the first axial flow turbine wheel;
the second axial flow turbine vane is for directing fluid medium passing through the first axial flow turbine wheel toward the second axial flow turbine wheel.
In the invention, the at least two axial flow turbine guide vanes can effectively accelerate and guide the fluid medium in the fluid pipeline to the outer diameter position for applying work, so that the fluid flows out along a certain direction and then respectively pushes the first axial flow turbine impeller and the second axial flow turbine impeller to rotate, the turbulence degree of the central flow field of the shaftless turbine is reduced, the flow loss is reduced, and the power generation efficiency is improved.
3. According to the pipeline type axial flow turbine variable frequency power generation device provided by the invention, the first axial flow turbine guide vane is a turbine adjustable guide vane; pipeline formula axial compressor turbine variable frequency power generation facility still includes: the adjusting guide vane, the adjusting control mechanism and the rotating shaft rod are in transmission connection with the adjusting control mechanism; the adjusting guide vane is in transmission connection with the rotating shaft, the adjusting control mechanism is used for driving the rotating shaft to rotate, and the rotating shaft drives the adjusting guide vane to rotate so as to adjust the opening degree of the adjusting guide vane in the first axial flow turbine guide vane and control the medium flow entering the turbine.
According to the invention, the opening degree of the adjustable guide vane can be controlled and adjusted through the adjustable guide vane of the turbine, so that the medium flow entering the turbine is controlled, and the output power of the turbine meets the requirements of different users. The pipeline type axial flow turbine variable-frequency power generation device can control the flow of the working medium entering the turbine according to the power requirement, and meets the requirement of variable-working-condition operation.
4. The invention provides a pipeline type axial flow turbine variable frequency power generation device, which further comprises: and the outlet guide vane is arranged in the outlet direction of the second axial flow turbine guide vane and is used for adjusting the flow field so as to reduce the downstream flow loss of the pipeline type axial flow turbine variable frequency power generation device.
In the invention, the flow field can be effectively adjusted through the outlet guide vane, so that the downstream flow loss of the pipeline type axial flow turbine variable frequency power generation device is reduced.
5. According to the pipeline type axial flow turbine variable frequency power generation device provided by the invention, the rotating speeds of the first axial flow turbine impeller and the second axial flow turbine impeller are different, and the first axial flow turbine impeller and the second axial flow turbine impeller can be changed at any time according to the operation working condition so as to ensure the operation efficiencies of the first axial flow turbine impeller and the second axial flow turbine impeller.
The power generation mechanism adopts the rim generator, so that a common axial flow turbine shaft system structure is cancelled, and the impellers of the axial flow turbine impellers such as the first axial flow turbine impeller and the second axial flow turbine impeller do not need to be connected through the same rotating shaft. Therefore, the impellers can have different rotating speeds, the selection of high-efficiency operation conditions is facilitated, and the utilization efficiency and the operation stability of the impellers on the airflow energy are improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of an electrically driven ducted Brayton cycle power plant with turbine adjustable vanes provided by the present invention;
fig. 2 is a schematic structural diagram of an electric transmission pipeline type brayton cycle power generation device provided by the invention.
Description of reference numerals:
1-a first axial turbine wheel; 2-second axial flow turbine vane wheel; 3-turbine inducer hub; 4-a first rim generator rotor; 5-a first rim generator stator; 6-a second rim generator rotor; 7-a second rim generator stator; 8-a first axial flow turbine frequency converter; 9-second axial flow turbine frequency converter; 10-a power grid; 11-first axial flow turbine vane; 12-second axial flow turbine vanes; 13-outlet guide vanes; 14-a power plant outer casing; 15-adjusting guide vanes; 16-adjusting the control mechanism; 17-rotating the shaft.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Example 1
In this embodiment, a pipeline type axial flow turbine variable frequency power generation device is provided, as shown in fig. 1, which includes:
an axial flow turbine wheel comprising: a first axial turbine wheel 1 and a second axial turbine wheel 2; in the invention, the first axial flow turbine blade wheel 1 and the second axial flow turbine blade wheel 2 are respectively connected with the outer shell 14 of the power generation device in a rotating way through impeller bearings; the impeller bearing is a rolling bearing. In addition, in the present embodiment, the rotation speeds of the first axial flow turbine impeller 1 and the second axial flow turbine impeller 2 are different, and the first axial flow turbine impeller 1 and the second axial flow turbine impeller 2 change at any time according to the operation condition, so as to ensure the operation efficiency of the two;
an air intake diversion mechanism comprising: a turbine guide hub 3 for guiding the fluid medium in the central position of the fluid pipeline to the axial flow turbine impeller so as to push the axial flow turbine impeller to rotate; the turbine guide hub 3 corresponds to the central shaft of the fluid pipeline, and one end of the turbine guide hub 3 facing the fluid flowing direction of the fluid pipeline is of an arc-shaped structure;
the power generation mechanism is an induction motor and is in transmission connection with the axial flow turbine impeller in a matching manner, and the power generation mechanism comprises: a first rim generator rotor 4 and a first rim generator stator 5 disposed opposite to the first axial turbine impeller 1, and a second rim generator rotor 6 and a second rim generator stator 7 disposed opposite to the second axial turbine impeller 2;
the converter is used for converting the electric energy that the power generation mechanism sent into power frequency electric energy in order to satisfy the power grid requirement, and it includes: a first axial flow turbine frequency converter 8 and a second axial flow turbine frequency converter 9 which are respectively arranged opposite to the first axial flow turbine wheel 1 and the second axial flow turbine wheel 2;
an axial flow turbine vane comprising: first and second axial turbine vanes 11, 12; the first axial turbine vane 11 is used for guiding a fluid medium in the fluid conduit to flow to the first axial turbine wheel 1; the second axial flow turbine vanes 12 are used to direct the fluid medium passing through the first axial flow turbine blade wheel 1 towards the second axial flow turbine blade wheel 2; the shape of an outlet guide vane of the axial flow turbine guide vane is designed according to a turbine outlet flow field, and the cross section of the outlet guide vane is in a NACA airfoil shape so as to rectify turbine outlet fluid and reduce flow loss;
the first axial flow turbine guide vane 11 in the present embodiment is a turbine adjustable guide vane;
pipeline formula axial compressor turbine variable frequency power generation facility still includes: the adjusting guide vane 15, the adjusting control mechanism 16 and the rotating shaft rod 17 are in transmission connection with the adjusting control mechanism 16; the adjusting guide vane 15 is in transmission connection with the rotating shaft rod 17, the adjusting control mechanism 16 is used for driving the rotating shaft rod 17 to rotate, and the rotating shaft rod 17 drives the adjusting guide vane 15 to rotate so as to adjust the opening degree of the adjusting guide vane 15 in the first axial flow turbine guide vane 11, thereby controlling the medium flow entering the turbine. In addition, the regulation control mechanism 16 is an electric driving mechanism and is electrically connected with the power grid 10 to obtain electric energy from the power grid 10;
and the outlet guide vane 13 is arranged in the outlet direction of the second axial flow turbine guide vane 12, and the outlet guide vane 13 is used for adjusting a flow field so as to reduce the downstream flow loss of the pipeline type axial flow turbine variable frequency power generation device.
The pipeline type axial flow turbine variable frequency power generation device comprises the following working steps:
fluid working media in the pipeline firstly flow through the first axial flow turbine guide vane 11, flow out in a certain direction after being accelerated, and then push the first axial flow turbine vane wheel 1 to rotate; the first rim generator rotor 4 fixed on the movable blade rim rotates along with the movable blade rim and forms relative motion with the first rim generator stator 5, induced electromotive force is generated, and electric energy is rectified by the first axial flow turbine frequency converter 8 and then is input into a power grid 10;
the fluid working medium then flows through the second axial flow turbine guide vane 12, flows out in a certain direction after being accelerated, then flows through the second axial flow turbine blade wheel 2, and pushes the second axial flow turbine blade wheel 2 to rotate; the second rim generator rotor 6 fixed on the rim of the movable blade rotates along with the second rim generator rotor and forms relative motion with the second rim generator stator 7, induced electromotive force is generated, and electric energy is input into a power grid 10 after being rectified by the second axial flow turbine frequency converter 9.
In addition, the turbine guide hub 3 and the outlet guide vane 13 can adjust the flow field of the fluid working medium in the pipeline, so that the flow loss of the downstream of the pipeline is reduced.
In the embodiment, the first rim generator rotor 4 is fixedly connected with the outer peripheral profile of the first axial flow turbine impeller 1 in an integrated manner so as to drive the first rim generator rotor 4 to rotate; the first rim generator stator 5 is fixedly arranged on the power generation device outer shell 14 to generate electric energy through the relative movement between the first rim generator rotor 4 and the first rim generator stator 5;
the second rim generator rotor 6 is fixedly connected with the outer peripheral profile of the second axial flow turbine blade wheel 2 in an integrated mode so as to drive the second rim generator rotor 6 to rotate; the second rim generator rotor 6 is fixedly arranged on the power plant outer housing 14 to generate electrical energy by means of a relative movement between the second rim generator rotor 6 and the second rim generator stator 7.
Of course, the present embodiment does not specifically limit the number of the axial turbine wheel, and in other embodiments, the axial turbine wheel includes: a first axial flow turbine wheel 1, a second axial flow turbine wheel 2, and a third axial flow turbine wheel. Of course, the number of the generating mechanism and the frequency converter which are matched with the axial flow turbine impeller corresponds to that of the axial flow turbine impeller.
Of course, the shape of the outlet guide vane of the axial flow turbine guide vane is not specifically limited in this embodiment, and in other embodiments, the shape of the outlet guide vane of the axial flow turbine guide vane is designed according to the turbine outlet flow field, and the cross-sectional shape of the outlet guide vane is a Clark airfoil profile to rectify the turbine outlet fluid to reduce the flow loss.
Certainly, the specific structural form of the power generation mechanism is not specifically limited in this embodiment, and in other embodiments, the power generation mechanism may also be a switched reluctance motor, a direct current motor, or a permanent magnet synchronous motor.
Of course, the present embodiment does not specifically limit the type of impeller bearing, and in other embodiments, the impeller bearing may also be an electromagnetic bearing.
Example 2
In this embodiment, a pipeline type axial flow turbine variable frequency power generation device is provided, as shown in fig. 2, the device includes:
an axial flow turbine wheel comprising: a first axial turbine wheel 1 and a second axial turbine wheel 2; in the invention, the first axial flow turbine blade wheel 1 and the second axial flow turbine blade wheel 2 are respectively connected with the outer shell 14 of the power generation device in a rotating way through impeller bearings; the impeller bearing is a rolling bearing. In addition, in the present embodiment, the rotation speeds of the first axial flow turbine impeller 1 and the second axial flow turbine impeller 2 are different, and the first axial flow turbine impeller 1 and the second axial flow turbine impeller 2 change at any time according to the operation condition, so as to ensure the operation efficiency of the two;
an air intake diversion mechanism comprising: a turbine guide hub 3 for guiding the fluid medium in the central position of the fluid pipeline to the axial flow turbine impeller so as to push the axial flow turbine impeller to rotate; the turbine guide hub 3 corresponds to the central shaft of the fluid pipeline, and one end of the turbine guide hub 3 facing the fluid flowing direction of the fluid pipeline is of an arc-shaped structure;
the power generation mechanism is an induction motor and is in transmission connection with the axial flow turbine impeller in a matching manner, and the power generation mechanism comprises: a first rim generator rotor 4 and a first rim generator stator 5 disposed opposite to the first axial turbine impeller 1, and a second rim generator rotor 6 and a second rim generator stator 7 disposed opposite to the second axial turbine impeller 2;
the converter is used for with the electric energy that power generation mechanism sent turns into the power frequency electric energy in order to satisfy the electric wire netting requirement, and it includes: a first axial flow turbine frequency converter 8 and a second axial flow turbine frequency converter 9 which are respectively arranged opposite to the first axial flow turbine wheel 1 and the second axial flow turbine wheel 2;
an axial flow turbine vane comprising: a first axial flow turbine vane 11 and a second axial flow turbine vane 12; the first axial turbine vane 11 is used for guiding a fluid medium in the fluid conduit to flow to the first axial turbine vane wheel 1; the second axial flow turbine vanes 12 are used to guide the fluid medium passing through the first axial flow turbine blade wheel 1 towards the second axial flow turbine blade wheel 2; the shape of an outlet guide vane of the axial flow turbine guide vane is designed according to a turbine outlet flow field, and the cross section of the outlet guide vane is in a NACA airfoil shape so as to rectify turbine outlet fluid and reduce flow loss;
and the outlet guide vane 13 is arranged in the outlet direction of the second axial flow turbine guide vane 12, and the outlet guide vane 13 is used for adjusting a flow field so as to reduce the downstream flow loss of the pipeline type axial flow turbine variable frequency power generation device.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. The utility model provides a pipeline formula axial compressor turbine variable frequency power generation facility which characterized in that includes:
at least two axial flow turbine wheels, said axial flow turbine wheels comprising: a first axial flow turbine blade wheel (1) and a second axial flow turbine blade wheel (2);
an air intake diversion mechanism comprising: a turbine guide hub (3) for guiding the fluid medium in the central position of the fluid pipeline to the axial flow turbine impeller so as to push the axial flow turbine impeller to rotate; the turbine flow guide hub (3) corresponds to the central shaft of the fluid pipeline in position, and one end, facing the fluid flowing direction of the fluid pipeline, of the turbine flow guide hub (3) is of an arc-shaped structure;
the electricity generation mechanism, for at least two, with axial compressor turbine impeller cooperation transmission links to each other, electricity generation mechanism includes: a first rim generator rotor (4) and a first rim generator stator (5) arranged opposite to the first axial flow turbine blade wheel (1), and a second rim generator rotor (6) and a second rim generator stator (7) arranged opposite to the second axial flow turbine blade wheel (2);
the converter, for at least two, be used for with the electric energy that power generation mechanism sent turns into power frequency electric energy in order to satisfy the electric wire netting requirement, it includes: a first axial flow turbine frequency converter (8) and a second axial flow turbine frequency converter (9) which are respectively arranged opposite to the first axial flow turbine wheel (1) and the second axial flow turbine wheel (2);
the medium in the fluid conduit pushes the first axial flow turbine blade wheel (1) to rotate; the first rim generator rotor (4) fixed on the rim of the movable blade rotates along with the movable blade and forms relative motion with the first rim generator stator (5) to generate induced electromotive force, and electric energy is rectified by the first axial flow turbine frequency converter (8) and then is input into a power grid (10);
the fluid working medium then flows through the second axial flow turbine blade wheel (2) to push the second axial flow turbine blade wheel (2) to rotate; and a second rim generator rotor (6) fixed on the rim of the movable blade rotates along with the movable blade and forms relative motion with a second rim generator stator (7) to generate induced electromotive force, and the electric energy is rectified by the second axial flow turbine frequency converter (9) and then is input into a power grid (10).
2. The ducted axial-flow turbine variable-frequency power generation device according to claim 1, further comprising:
at least two axial turbine vanes, comprising: a first axial flow turbine guide vane (11) and a second axial flow turbine guide vane (12);
the first axial flow turbine vane (11) is used for guiding a fluid medium in the fluid pipeline to flow to the first axial flow turbine blade wheel (1);
the second axial flow turbine vane (12) is used to guide the fluid medium passing through the first axial flow turbine vane (1) towards the second axial flow turbine vane (2).
3. The ducted axial turbine variable frequency power generation device according to claim 2, wherein the first axial turbine guide vane (11) is a turbine adjustable guide vane;
pipeline formula axial compressor turbine variable frequency power generation device still includes: the adjusting guide vane (15), the adjusting control mechanism (16) and a rotating shaft lever (17) which is in transmission connection with the adjusting control mechanism (16); the adjusting guide vane (15) is in transmission connection with the rotating shaft rod (17), the adjusting control mechanism (16) is used for driving the rotating shaft rod (17) to rotate, and the rotating shaft rod (17) drives the adjusting guide vane (15) to rotate so as to adjust the opening degree of the adjusting guide vane (15) in the first axial flow turbine guide vane (11) and further control the medium flow entering a turbine.
4. The ducted axial turbine variable frequency power generation device according to claim 3, wherein the regulation control mechanism (16) is an electric drive mechanism electrically connected to the power grid (10) to obtain electric power from the power grid (10).
5. The ducted axial-flow turbine variable frequency power generation device according to claim 2, characterized by further comprising:
and the outlet guide vane (13) is arranged in the outlet direction of the second axial flow turbine guide vane (12), and the outlet guide vane (13) is used for adjusting a flow field so as to reduce the downstream flow loss of the pipeline type axial flow turbine variable frequency power generation device.
6. The ducted axial turbine variable frequency power generation device according to claim 1, wherein the first axial turbine impeller wheel (1) and the second axial turbine impeller wheel (2) are rotatably connected to a power generation device outer casing (14) through impeller bearings, respectively.
7. The pipeline type axial flow turbine variable frequency power generation device according to claim 1, wherein the first axial flow turbine blade wheel (1) and the second axial flow turbine blade wheel (2) have different rotating speeds, and the first axial flow turbine blade wheel (1) and the second axial flow turbine blade wheel (2) change at any time according to the operating condition so as to ensure the operating efficiency of the first axial flow turbine blade wheel and the second axial flow turbine blade wheel.
8. The ducted axial-flow turbine variable-frequency power generation device according to claim 1,
the first rim generator rotor (4) is fixedly connected with the peripheral outline of the first axial flow turbine impeller (1) in an integrated mode so as to drive the first rim generator rotor (4) to rotate; the first rim generator stator (5) is fixedly arranged on a power generation device outer shell (14) to generate electric energy through relative movement between the first rim generator rotor (4) and the first rim generator stator (5);
the second rim generator rotor (6) is fixedly connected with the peripheral profile of the second axial flow turbine blade wheel (2) in an integrated mode so as to drive the second rim generator rotor (6) to rotate; the second rim generator rotor (6) is fixedly arranged on a power plant outer housing (14) to generate electrical energy by a relative movement between the second rim generator rotor (6) and the second rim generator stator (7).
9. The ducted axial turbine variable frequency power generation device according to claim 1, wherein the outlet guide vane shape of the axial turbine guide vane is designed according to a turbine outlet flow field, and the outlet guide vane cross-sectional shape is a NACA airfoil or a Clark airfoil to rectify a turbine outlet fluid to reduce flow loss; and/or the presence of a gas in the atmosphere,
the power generation mechanism is an induction motor or a switched reluctance motor or a direct current motor or a permanent magnet synchronous motor; and/or the presence of a gas in the atmosphere,
the fluid medium is a liquid or a gas.
10. The ducted axial-flow turbine variable-frequency power generation device according to claim 6, wherein the impeller bearing is a rolling bearing or an electromagnetic bearing.
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| CN202310010444.2A CN115949544A (en) | 2023-01-04 | 2023-01-04 | Pipeline type axial flow turbine variable frequency power generation device |
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| CN202310010444.2A CN115949544A (en) | 2023-01-04 | 2023-01-04 | Pipeline type axial flow turbine variable frequency power generation device |
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| CN202310010444.2A Pending CN115949544A (en) | 2023-01-04 | 2023-01-04 | Pipeline type axial flow turbine variable frequency power generation device |
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