CN112197985A - A unit support platform for model test of dynamic characteristics of pumped storage - Google Patents

A unit support platform for model test of dynamic characteristics of pumped storage Download PDF

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Publication number
CN112197985A
CN112197985A CN202010825297.0A CN202010825297A CN112197985A CN 112197985 A CN112197985 A CN 112197985A CN 202010825297 A CN202010825297 A CN 202010825297A CN 112197985 A CN112197985 A CN 112197985A
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support
flywheel
fed motor
doubly
model
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CN202010825297.0A
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CN112197985B (en
Inventor
陈满
滕军
胡丽杰
彭煜民
吴新平
张韬
高彦明
王文辉
陈仕贝
宋自飞
范丽芳
赵志高
彭涛
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Guangdong Water Resources and Electric Power Survey and Design Institute Co.,Ltd.
Hadong National Hydroelectric Power Equipment Engineering Technology Research Central Co ltd
Peak and Frequency Regulation Power Generation Co of China Southern Power Grid Co Ltd
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Guangdong Hydropower Planning & Design Institute
Hadong National Hydroelectric Power Equipment Engineering Technology Research Central Co ltd
Peak and Frequency Regulation Power Generation Co of China Southern Power Grid Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M99/00—Subject matter not provided for in other groups of this subclass
    • G01M99/005—Testing of complete machines, e.g. washing-machines or mobile phones
    • 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
    • F03B11/00—Parts or details not provided for in, or of interest apart from, the preceding groups, e.g. wear-protection couplings, between turbine and generator
    • F03B11/008—Measuring or testing arrangements
    • 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
    • F03B13/06—Stations or aggregates of water-storage type, e.g. comprising a turbine and a pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M5/00—Engine beds, i.e. means for supporting engines or machines on foundations
    • 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
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Hydraulic Turbines (AREA)

Abstract

本发明涉及一种用于抽水蓄能动态特性模型试验的机组支撑平台，包括机架、伞式支撑、万向联轴器、安装在水泵水轮机轴上的可拆配飞轮、模型连接板、固定支座、尾水管支撑和栅格式基座。本发明既能保证高机械转速下的可拆配飞轮运转稳定性，又能提高轴系的角向补偿能力，可靠地传递转矩和运动，实现水泵水轮机轴与双馈电机轴的高效、稳定传动。本发明结构紧凑、占用空间小，具有加固、缓冲和减振的特点，能有效降低海水抽水蓄能动态特性模型试验的运行风险。本发明具有缓冲、减振和提高轴系动态性能的特点，适用于高机械转速、大转动惯量的抽水蓄能机组及常规水力发电机组动态特性模型试验装置中。

Figure 202010825297

The invention relates to a unit support platform for model test of pumped-storage dynamic characteristics, comprising a frame, an umbrella support, a universal coupling, a detachable flywheel installed on a pump-turbine shaft, a model connecting plate, a fixed Bearings, draft tube supports and grid bases. The invention can not only ensure the running stability of the detachable flywheel under high mechanical rotation speed, but also improve the angular compensation ability of the shaft system, transmit torque and motion reliably, and realize the high efficiency and stability of the shaft of the pump turbine and the shaft of the double-fed motor. transmission. The invention has compact structure and small occupied space, has the characteristics of reinforcement, buffering and vibration reduction, and can effectively reduce the operation risk of the model test of the dynamic characteristics of seawater pumped storage. The invention has the characteristics of buffering, damping and improving the dynamic performance of the shafting, and is suitable for the model test device for the dynamic characteristics of the pumped storage unit with high mechanical speed and the large moment of inertia and the conventional hydraulic generating unit.

Figure 202010825297

Description

Unit supporting platform for pumped storage dynamic characteristic model test
Technical Field
The invention relates to a supporting platform, in particular to a unit supporting platform for a pumped storage dynamic characteristic model test.
Background
With the transformation of the world energy system from fossil energy to renewable energy, China and all countries in the world are exploring theories and practices for promoting the consumption of the renewable energy. Hydroelectric is the world's largest renewable energy source, and its driving force for development has been to meet the power generation demand to regulate the system dynamic quality shift. The pumped storage power station plays an important role in compensating the intermittency of renewable energy sources and playing a role in frequency modulation and peak shaving tasks of a power grid, and can be called as a rapid response troop of a power system. The seawater pumped storage power station is an important innovation of the traditional pumped storage power station. The thirteen-five energy planning in China clearly indicates that research on seawater pumped storage, strengthening the research on key technologies of seawater pumped storage units and promoting the construction of demonstration projects of seawater pumped storage power stations is required. Therefore, the independent research on the operation mechanism, the control strategy and the performance improvement of the seawater pumped storage power station is urgent.
The seawater pumped storage model test is a key for researching the operation mechanism of the unit, formulating the operation strategy of the unit and improving the dynamic characteristic of the unit, and is a necessary way for the construction and the production of a seawater pumped storage power station. However, at present, no seawater pumped storage dynamic characteristic model test device is built in China, and the development of the seawater pumped storage technology is severely restricted.
A quite large unit supporting platform is a key part of a seawater pumped storage dynamic characteristic model test device. The traditional pumped storage model test device has no strict requirement on unit support due to low mechanical rotating speed and small rotational inertia. However, the seawater pumped storage unit with high mechanical rotation speed and large rotational inertia puts higher requirements on the unit supporting platform. The conventional unit supporting platform can increase the operation risk of a dynamic characteristic model test of the seawater pumped storage unit, and can also induce shafting vibration to damage unit components. Therefore, the conventional unit supporting platform cannot be applied to a dynamic characteristic model test device of the seawater pumped storage unit.
Disclosure of Invention
The invention aims to solve the technical problem of providing a unit supporting platform for a dynamic characteristic model test of pumped storage, which can be widely applied to a dynamic characteristic model test device of a conventional pumped storage unit or a water-turbine generator set with high mechanical rotation speed and large rotational inertia, and can effectively relieve the vibration of the unit and improve the operation stability of the unit.
The technical scheme adopted by the invention is as follows:
a unit supporting platform for a pumped storage dynamic characteristic model test is characterized by comprising: the device comprises a frame 1, an umbrella type support 2, a universal coupling 3, a detachable flywheel 4 arranged on a water pump and turbine shaft 16, a fixed support 5, a model connecting plate 6, a draft tube support 7 and a base 8;
the machine frame 1 is of a frame type, is erected on the base 8 and is provided with a middle model supporting layer and a top double-fed motor supporting layer, corresponding through holes are formed in the middle of the model supporting layer and the double-fed motor supporting layer, the double-fed motor is supported on the top surface of the double-fed motor supporting layer, a model connecting plate 6 with a hole in the middle is fixed on the bottom surface of the model supporting layer, the top surface of the model connecting plate 6 is connected with a fixed support 5 provided with a lower bearing of a water pump and water turbine shaft 16 through a connecting piece, and the bottom surface of;
the umbrella type support 2 is provided with two flanges with a large upper part and a small lower part, the upper flange 36 is connected with the lower flange 37 through a plurality of support ribs 35, the upper flange 36 is connected below the bottom surface of a supporting layer of the double-fed motor through a connecting piece, the bottom surface of the lower flange 37 is connected with an upper bearing of a water pump and turbine shaft 16 through a connecting piece, and a detachable flywheel is arranged between the double-fed motor layer and the water pump and turbine layer;
the upper end of the universal coupling 3 is connected with a downward output shaft of the double-fed motor 15, and the lower end of the universal coupling is connected with the upper end of a water pump and water turbine shaft 16;
the draft tube support 7 is of a steel frame structure and can be longitudinally movably fixed in a bolt groove 21 of the base 8 through bolts, so that the draft tube 20 is convenient to disassemble.
On the basis of the above, the present invention may also have the following preferred types:
the frame 1 structure be: the middle parts of four symmetrically arranged upright posts 9 are connected with two cross beams 10 by two longitudinal beams 11, and the model connecting plate 6 is fixed on the bottom surfaces of the two cross beams 10 by a connecting piece to form a model supporting layer; the top ends of the four upright posts 9 are sequentially connected through four I-beams, the top surfaces of the four I-beams are covered by a rib plate 22 with a hole in the middle, the middle of the rib plate 22 is provided with a double feed base 13 which is provided with an annular upper flange and a lower flange and is connected through a plurality of radial vertical plates 12, the outer edge of the lower flange of the double feed motor base 13 is welded with a middle hole of the rib plate 22, the upper flange is symmetrically and fixedly supported at the top ends of the four upright posts 9 through four inclined supports 14, each inclined support 14 consists of a bent plate and a reinforced vertical plate below the bent plate, and the rib plate, the double feed motor base and the inclined supports form a double feed motor; the double-fed motor is arranged on an upper flange of the double-fed motor base, and an upper flange of the umbrella type support 2 is connected to a lower flange of the double-fed motor base.
The detachable flywheel 4 comprises a flywheel 32 and a flywheel cover 31, threaded holes are uniformly distributed on the circumference of the upper end face of the flywheel, through holes corresponding to the threaded holes on the upper end face of the flywheel are uniformly distributed in the holes formed in the bottom of the cylindrical flywheel cover 31, and the through holes can be connected through a connecting piece. Thereby changing the moment of inertia of the flywheel.
The base 8 is a grid type base, and the upright post 9 of the rack 1 is connected with the grid type base 8 through a bolt, so that the vibration of the upright post is dissipated, and the stability of the unit is improved.
The model connecting plate 6 is a square plate with a round hole in the middle, fixing support positioning screw holes 27, 4 waist round holes 23 and volute large flange positioning screw holes 26 are evenly distributed on the periphery of the round hole of the square plate in sequence, model connecting plate fixing screw holes 24 are also evenly distributed on two opposite edges in a straight line, and servomotor positioning screw holes 25 are arranged on the other edge.
The invention provides a unit supporting platform for a pumped storage dynamic characteristic model test, wherein a flywheel is arranged between a double-fed motor layer and a pump turbine layer, and double supporting of an umbrella type support and a fixed support is adopted, so that the running stability of the flywheel is effectively improved; the universal coupling is adopted to provide better angular compensation capability for a unit shafting, so that the shafting vibration is effectively relieved while high transmission efficiency is kept; the grid type base can absorb the vibration of the machine frame and the unit supported by the draft tube, and has the characteristics of buffering and vibration reduction. The invention lays an equipment foundation for the research of the dynamic characteristics and the operation strategy of the seawater pumped storage unit, and provides a technical means for ensuring the smooth development of a seawater pumped storage dynamic characteristic model test.
Compared with the prior art, the invention has the following advantages and effects:
(1) the invention changes the installation position of the flywheel in the prior art, designs the detachable flywheel which is arranged between the double-fed motor layer and the pump turbine layer, adopts the umbrella type supporting and fixed support double fixing mode, can flexibly adjust the rotary inertia of the unit, can improve the operation stability and greatly reduce the shafting vibration risk.
(2) The universal coupling is adopted to connect the water pump water turbine shaft and the double-feed motor shaft, so that the angular compensation capability of the shaft system is improved, and the vibration of the shaft system is effectively relieved while the high transmission efficiency is kept.
(3) The frame and the grid type base structure designed by the invention have the characteristics of buffering and vibration reduction, are beneficial to absorbing the vibration of the unit and reducing the operation risk of a seawater pumped storage dynamic characteristic model test.
(4) The invention is not only suitable for the dynamic characteristic model test device of seawater pumped storage, but also widely suitable for the dynamic characteristic model test device of the constant-speed pumped storage unit with high mechanical rotating speed and large rotational inertia and the conventional hydroelectric generating set
Drawings
FIG. 1 is a general schematic diagram of a unit support platform for a pumped storage dynamic characteristic model test;
FIG. 2 is a top view of a flywheel layer according to the present invention;
FIG. 3 is a top view of a double-fed machine layer according to the present invention;
FIG. 4 is a front view of an angled support bend plate of the present invention;
FIG. 5 is a top view of an elbow plate of the angle brace of the present invention;
FIG. 6 is a front view of the umbrella support of the present invention;
FIG. 7 is a top plan view of the umbrella support of the present invention;
FIG. 8 is a front view of the flywheel cover of the present invention;
FIG. 9 is a front view of the flywheel of the present invention;
FIG. 10 is a top view of the flywheel of the present invention;
FIG. 11 is a schematic view of a mold connecting plate according to the present invention.
In the figure: 1-a frame, 2-an umbrella type support, 3-a universal coupling, 4-a detachable flywheel, 5-a fixed support, 6-a model connecting plate, 7-a draft tube support, 8-a grid type base, 9-a vertical column, 10-a cross beam, 11-a longitudinal beam, 12-a radial vertical plate, 13-a double-fed motor base, 14-an inclined support, 15-a double-fed motor, 16-a water pump and water turbine shaft, 17-a flywheel first bolt, 18-a flywheel second bolt, 19-a volute, 20-a draft tube, 21-a bolt groove, 22-a rib plate with a hole in the middle, 23-a kidney round hole, 24-a model connecting plate fixed screw hole, 25-a servomotor positioning screw hole, 26-a volute large flange positioning screw hole and 27-a fixed support positioning screw hole, 28-crank arm, 29-control ring, 30-servomotor, 31-flywheel cover, 32-flywheel, 33-umbrella support and upper bracket positioning screw hole, 34-umbrella support and flywheel upper bearing positioning screw hole, 35-support rib, 36-umbrella support upper end flange and 37-umbrella support lower end flange.
Detailed Description
As shown in fig. 1 to 11, an embodiment of the present invention of a unit support platform for a pumped storage dynamic characteristic model test includes a frame 1, an umbrella-type support 2, a universal coupling 3, a detachable flywheel 4 mounted on a water pump/turbine shaft 16, a fixed support 5, a model connecting plate 6, a draft tube support 7, and a grid-type base 8.
The machine frame 1 is of a frame type, is erected on the base 8 and is provided with a middle model supporting layer and a top double-fed motor supporting layer, corresponding through holes are formed in the middle of the model supporting layer and the double-fed motor supporting layer, the double-fed motor is supported on the top surface of the double-fed motor supporting layer, a model connecting plate 6 with a hole in the middle is fixed on the bottom surface of the model supporting layer, the top surface of the model connecting plate 6 is connected with a fixed support 5 provided with a lower bearing of a water pump and water turbine shaft 16 through a connecting piece, and the bottom.
As shown in fig. 6 and 7, the umbrella type support 2 has two flanges with large top and small bottom, the upper flange 36 is connected with the lower flange 37 by 8 support ribs 35, the upper flange 36 is connected with the bottom surface of the doubly-fed motor bearing layer by a connecting piece, the bottom surface of the lower flange 37 is connected with the upper bearing of the pump-turbine shaft 16 by a connecting piece, and the detachable flywheel is installed between the doubly-fed motor layer and the pump-turbine layer. The umbrella type support 2 is used for fixing the detachable flywheel and water pump and water turbine shaft 16.
Referring to fig. 1, the upper end of the universal coupling 3 is connected with a downward output shaft of the double-fed motor 15, and the lower end of the universal coupling is connected with the upper end of the water pump water turbine shaft 16, so that the angular compensation capability of the shafting is improved, and the vibration of the shafting is effectively relieved while the high transmission efficiency is kept.
The draft tube support 7 is of a steel frame structure and is longitudinally movably fixed in a bolt groove 21 of the base 8 through bolts, so that the draft tube 20 is convenient to detach.
Referring to fig. 1 to 3, the specific structure of the rack 1 is: the middle parts of four symmetrically arranged upright posts 9 are connected with two cross beams 10 by two longitudinal beams 11, and a model connecting plate 6 is fixed on the bottom surfaces of the two cross beams 10 by a connecting piece to form a model supporting layer; the top ends of the four upright posts 9 are sequentially connected by four I-beams, the top surfaces of the four I-beams are covered by a rib plate 22 with a hole in the middle, the middle of the rib plate 22 is provided with a double-feed engine base 13 which is provided with an annular upper flange and a lower flange and is connected by a plurality of radial vertical plates 12, the outer edge of the lower flange of the double-feed engine base 13 is welded with a middle hole of the rib plate 22, the upper flange is symmetrically and fixedly supported at the top ends of the four upright posts 9 by four inclined supports 14, each inclined support 14 consists of a bent plate and a reinforced vertical plate below the bent plate, and the rib plate, the double-feed engine base and the inclined; the double-fed motor is arranged on an upper flange of the double-fed motor base, and an upper flange of the umbrella type support 2 is connected to a lower flange of the double-fed motor base. The elbow plate structure of the diagonal brace 14 is shown in fig. 4 and 5.
Referring to fig. 8 to 10, the detachable flywheel 4 includes a flywheel 32 and a flywheel cover 31, threaded holes are uniformly distributed on the circumference of the upper end surface of the flywheel, and through holes corresponding to the threaded holes of the upper end surface of the flywheel are uniformly distributed on the bottom of the cylindrical flywheel cover 31 and can be connected by a connecting piece. The moment of inertia of the flywheel can be changed by disassembling and assembling the flywheel first bolt 17 and the flywheel first bolt 18.
The base 8 is a grid type base, and the upright post 9 of the rack 1 is connected with the grid type base 8 through a bolt, so that the vibration of the upright post is dissipated, and the stability of the unit is improved.
Referring to fig. 11, the model connecting plate 6 is a square plate with a round hole in the middle, fixing support positioning screw holes 27, 4 waist round holes 23 and volute large flange positioning screw holes 26 are sequentially and uniformly distributed on the circumference outside the round hole of the square plate, model connecting plate fixing screw holes 24 are linearly and uniformly distributed on two opposite sides, and servomotor positioning screw holes 25 are arranged on the other side.
The waist-round hole 23 is used for facilitating the installation and the disassembly of a sensor on the top cover of the pump turbine; the model connecting plate fixing screw holes 24 are respectively provided with 8 pairs along the two cross beams 10 and are used for fixing the model connecting plate 6 on the cross beams 10; the servomotor positioning screw hole 25 is used for fixing the servomotor; the volute large flange positioning screw hole 26 is used for fixing the volute 19 on the model connecting plate 6; the fixing support positioning screw hole 27 is used for connecting the fixing support 5 and the model connecting plate 6.
As shown in fig. 2, the servomotor 30 is fixed on the model connecting plate 6 through the servomotor positioning screw hole 25, and the servomotor 30 is connected with the pump turbine crank arm 28 to push the control ring 29 to move, thereby controlling the opening and closing of the guide vane.
As shown in fig. 1, the draft tube support 7 is of a steel frame structure and is fixed in a bolt groove 21 of the grid-type base 8 through bolts; the draft tube support 7 can move longitudinally, so that the draft tube 20 is convenient to disassemble; the upright post 9 of the frame 1 is connected with the grid type base 8 through bolts, so that the vibration of the upright post is dissipated, and the stability of the unit is improved.
The unit supporting platform for the pumped storage dynamic characteristic model test is applied to a seawater pumped storage dynamic characteristic model test device, and is subjected to no-load debugging of the working condition of a water turbine and no-load debugging of the working condition of a pumped storage respectively, and the debugging results prove that the unit supporting platform for the seawater pumped storage dynamic characteristic model test can effectively relieve the vibration of a unit and improve the operation stability of the seawater pumped storage dynamic characteristic model test device, and lays a solid equipment foundation for the development of a subsequent seawater pumped storage dynamic characteristic model test.
The seawater pumping energy storage dynamic characteristic model test device is compact in structure, small in occupied space, has the characteristics of reinforcement, buffering and vibration reduction, and can effectively reduce the operation risk of a seawater pumping energy storage dynamic characteristic model test. The invention can also be widely applied to the dynamic characteristic model test device of the constant-speed pumped storage unit with high mechanical rotating speed and large rotational inertia and the conventional hydroelectric generating set.

Claims (5)

1.一种用于抽水蓄能动态特性模型试验的机组支撑平台，其特征在于包括：机架(1)、伞式支撑(2)、万向联轴器(3)、安装在水泵水轮机轴(16)上的可拆配飞轮(4)、固定支座(5)、模型连接板(6)、尾水管支撑(7)及基座(8)；1. A unit support platform for model test of pumped-storage dynamic characteristics, it is characterized in that comprising: frame (1), umbrella support (2), universal coupling (3), installed on the shaft of water pump turbine (16) Removable flywheel (4), fixed support (5), model connecting plate (6), draft tube support (7) and base (8); 所述的机架(1)为框架式，竖立在基座(8)上，设有中间的模型支承层和顶上的双馈电机支承层，模型支承层和双馈电机支承层中间开有对应的通孔，双馈电机支承层的顶面支承双馈电机，模型支承层的底面固定有中间开孔的模型连接板(6)，模型连接板的顶面以连接件连接装有水泵水轮机轴(16)的下轴承的固定支座(5)、底面则以连接件连接蜗壳(19)；The frame (1) is of frame type and is erected on the base (8), and is provided with a model support layer in the middle and a doubly-fed motor support layer on the top. Corresponding through holes, the top surface of the doubly-fed motor support layer supports the doubly-fed motor, the bottom surface of the model support layer is fixed with a model connecting plate (6) with a middle opening, and the top surface of the model connecting plate is connected with a connector and is equipped with a water pump turbine. The fixed support (5) and the bottom surface of the lower bearing of the shaft (16) are connected to the volute (19) by a connecting piece; 所述的伞式支撑(2)具有上大下小两个法兰，上法兰(36)和下法兰(37)之间以若干支撑肋条(35)连接，上法兰通过连接件连接在双馈电机支承层的底面下，下法兰的底面以连接件连接水泵水轮机轴的上轴承，可拆配飞轮安装在双馈电机层和水泵水轮机层之间；The umbrella support (2) has two flanges, the upper flange and the lower flange, the upper flange (36) and the lower flange (37) are connected by a plurality of support ribs (35), and the upper flange is connected by a connecting piece Under the bottom surface of the doubly-fed motor support layer, the bottom surface of the lower flange is connected to the upper bearing of the pump-turbine shaft by a connector, and the detachable flywheel is installed between the doubly-fed motor layer and the pump-turbine layer; 所述的万向联轴器上端联接双馈电机(15)向下的输出轴、下端联接水泵水轮机轴(16)上端；The upper end of the universal coupling is connected to the downward output shaft of the doubly-fed motor (15), and the lower end is connected to the upper end of the pump-turbine shaft (16); 所述的尾水管支撑(7)为钢架结构，可纵向移动地通过螺栓固定在基座(8)的螺栓槽(21)中。The draft water pipe support (7) is a steel frame structure, and can be fixed in the bolt groove (21) of the base (8) through bolts in a longitudinally movable manner. 2.根据权利要求1所述的用于抽水蓄能动态特性模型试验的机组支撑平台，其特征在于：所述的机架(1)结构为：对称布置的四根立柱(9)的中部以两根纵梁(11)和两根横梁(10)连接，所述的模型连接板(6)以连接件固定在两根横梁(10)的底面构成模型支承层；四根立柱(9)的顶端以四根工字梁依次连接，四根工字梁的顶面以一中间开孔的筋板(22)覆盖，筋板(22)的中间为一个具有环形的上法兰和下法兰并以若干径向竖板(12)连接的双馈电机座(13)，双馈电机座(13)的下法兰外沿与筋板(22)的中间孔焊接、上法兰以四个斜支撑(14)对称地固定支撑在所述的四根立柱(9)的顶端，斜支撑(14)由弯头板及之下的加强竖板构成，筋板、双馈电机座和斜支撑构成双馈电机支承层；双馈电机设在双馈电机座的上法兰上，伞式支撑(2)的上法兰则连接在双馈电机座的下法兰上。2. The unit support platform for pumped-storage dynamic characteristic model test according to claim 1, characterized in that: the frame (1) structure is: the middle of the symmetrically arranged four uprights (9) is The two longitudinal beams (11) are connected with the two transverse beams (10), and the model connecting plate (6) is fixed on the bottom surface of the two transverse beams (10) by connecting pieces to form a model supporting layer; The top ends are connected in sequence with four I-beams, and the top surfaces of the four I-beams are covered with a rib plate (22) with a hole in the middle, and the middle of the rib plate (22) is an upper flange and a lower flange with an annular shape The doubly-fed motor seat (13) is connected by a number of radial vertical plates (12). The diagonal support (14) is symmetrically fixed and supported on the top of the four uprights (9), the diagonal support (14) is composed of the elbow plate and the reinforcing vertical plate below, the rib plate, the double-fed motor seat and the diagonal support The doubly-fed motor support layer is formed; the doubly-fed motor is arranged on the upper flange of the doubly-fed motor base, and the upper flange of the umbrella support (2) is connected to the lower flange of the doubly-fed motor base. 3.根据权利要求1所述的用于抽水蓄能动态特性模型试验的机组支撑平台，其特征在于：所述的可拆配飞轮(4)包括飞轮(32)和飞轮盖(31)，飞轮的上端面圆周上均布有螺纹孔，筒状飞轮盖(31)的筒底开孔并均布有对应于飞轮的上端面螺纹孔的通孔，两者可以连接件连接。3. The unit support platform for model test of pumped-storage dynamic characteristics according to claim 1, characterized in that: the detachable flywheel (4) comprises a flywheel (32) and a flywheel cover (31), and the flywheel Threaded holes are evenly distributed on the circumference of the upper end surface of the flywheel, and the bottom of the cylindrical flywheel cover (31) is open with through holes corresponding to the threaded holes on the upper end surface of the flywheel, and the two can be connected by connecting pieces. 4.根据权利要求1所述的用于抽水蓄能动态特性模型试验的机组支撑平台，其特征在于：所述的基座(8)为栅格式基座，机架(1)的立柱(9)通过螺栓与栅格式的基座(8)连接。4. The unit support platform for pumped-storage dynamic characteristic model test according to claim 1, is characterized in that: the described base (8) is a grid base, and the upright column ( 9) Connect to the grid base (8) by means of bolts. 5.根据权利要求1所述的用于抽水蓄能动态特性模型试验的机组支撑平台，其特征在于：所述的模型连接板(6)为中间开有圆孔的方板，方板的圆孔之外依次圆周均布有固定支座定位螺孔(27)、4个腰圆孔(23)和蜗壳大法兰定位螺孔(26)，两对边上还直线均布有模型连接板固定螺孔(24)，另一边上开有接力器定位螺孔(25)。5. The unit support platform for model test of pumped-storage dynamic characteristics according to claim 1, characterized in that: the model connecting plate (6) is a square plate with a circular hole in the middle, and the circular Outside the hole, there are fixed support positioning screw holes (27), four waist circle holes (23) and large flange positioning screw holes (26) of the volute in order, and the two opposite sides are evenly distributed with model connecting plates. The fixing screw hole (24) is provided on the other side with the positioning screw hole (25) of the servomotor.
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