Pool test model device for double-rotor fan

Abstract

The invention discloses a pool test model device for a double-rotor fan, and belongs to the technical field of wind power generation, the pool test model device comprises a driving system, a front end variable pitch system, a rear end variable pitch system and a six-component sensor, the front end variable pitch system, the rear end variable pitch system and the six-component sensor are arranged corresponding to a front end rotor and a rear end rotor respectively, and the driving system drives the double-rotor fan to rotate through shafting transmission connection. The front-end variable-pitch system and the rear-end variable-pitch system are used for adjusting the blade pitch angles of the front-end rotor and the rear-end rotor correspondingly, the wind speed and the airflow direction of the double-rotor fan can be flexibly adjusted through accurate control over the rotating direction and the rotating speed of the motor, and therefore the pneumatic efficiency and the operation stability of the system are improved, and when a rotary knob is loosened, a sliding table can rotate in a self-adaptive mode; the structure has the manual setting function and the self-adaptive variable pitch function, the structure is simple, response is flexible, efficient energy capture and stable operation can be achieved without a complex control system, and the reliability and adaptability of the system are remarkably improved.

Description

TECHNICAL FIELD

[0001] The application relates to a double-rotor wind turbine water pool test model device, in particular to a water pool test model device for a double-rotor wind turbine, and belongs to the technical field of wind power generation. BACKGROUND

[0002] With the rapid development of offshore wind power technology, the operation performance and structural safety of wind turbines in complex marine environments have attracted increasing attention. In order to study the stress and motion characteristics of wind turbines under the coupling action of wind, wave and current, wind turbine water pool tests have gradually become an important research method. This method simulates real offshore environments by building a scaled model in a controllable water pool and using a wave-making, current-making and artificial wind field system, thereby realizing experimental research on the dynamic characteristics, stability and energy conversion efficiency of floating wind turbines.

[0003] At present, most wind turbine water pool tests are mainly carried out on single-rotor wind turbine models. Researchers study the stress changes and power output rules of wind turbines under different wind speeds, wave heights and platform motion conditions by arranging a single wind wheel model in the water pool and combining mechanical sensors and motion measurement systems. Such tests play an important role in verifying numerical simulation results, evaluating wind turbine platform stability and optimizing control strategies.

[0004] However, with the continuous increase of wind turbine installed capacity and blade length, the limitations of single-rotor wind turbines in energy capture efficiency and wake utilization gradually appear. The single-stage energy conversion mode of single-rotor wind turbines is difficult to fully utilize the wake kinetic energy, resulting in limited overall energy utilization. Researchers have proposed the concept of dual-rotor wind turbines (DRWT). This structure arranges two rotors in front and back on the same axis, realizes multi-stage energy extraction without significantly increasing the size of a single rotor, and effectively improves wind energy capture rate and reduces transmission system load by reasonably designing torque ratio, spacing and phase difference. Existing research shows that the dual-rotor structure can effectively improve the wake recovery characteristics, and its power coefficient (Cp) is higher than that of traditional single-rotor wind turbines, which has significant energy utilization potential. Cp

[0005] However, due to the complex structure of dual-rotor wind turbines and the strong coupling between rotors, existing wind turbine water pool test devices cannot meet the test requirements of dual-rotor systems. Traditional single-rotor devices usually only have a single driving shaft system and cannot realize independent adjustment of the spacing, relative speed and phase difference between the two rotors. It is also difficult to reproduce the real state of dual-rotor cooperative work in wind, wave and current coupling environments. SUMMARY

[0006] ​The main purpose of the present application is to provide a driving motor and a variable pitch control strategy for a double-rotor fan pool test.

[0007] The purpose of the present application can be achieved by adopting the following technical solutions: A pool test model device for a double-rotor fan, comprising a front-end rotor and a rear-end rotor, the front-end rotor being arranged at the front end of the cabin, and the rear-end rotor being arranged at the rear end of the cabin; The driving system is provided with a front-end driving system and a rear-end driving system corresponding to the front-end rotor and the rear-end rotor, respectively. The driving system drives the double-rotor fan to rotate through a shaft train, and the front-end variable pitch system and the rear-end variable pitch system are used for adjusting the blade pitch angle of the front-end rotor and the rear-end rotor, respectively.

[0008] Preferably, the driving system comprises a front-end driving system, a rear-end driving system and a driver frame. The front-end driving system is used for driving the front-end rotor to rotate, the rear-end driving system is used for driving the rear-end rotor to rotate, and the front-end driving system and the rear-end driving system are arranged in axial symmetry.

[0009] Preferably, the two ends of the driver frame are symmetrically provided with the front-end rotor and the rear-end rotor.

[0010] Preferably, the front-end driving system and the rear-end driving system are composed of a driving motor, a torque sensor, a hollow servo cup tail seat, an L-shaped support, a speed reducer, a shaft coupling, an electric slip ring, a speed reducer output shaft, an electric slip ring input shaft and a driving shaft. The driving motor is bolted to the hollow servo cup tail seat and the driver frame, and the driving motor is coaxially connected with the speed reducer.

[0011] Preferably, the speed reducer is bolted to the driver frame through the L-shaped support, and the speed reducer output shaft is coaxially connected with the shaft coupling. The shaft coupling is used for connecting the speed reducer output shaft and the electric slip ring input shaft, the output shaft of the electric slip ring is the driving shaft of the rotor, and the shaft coupling, the electric slip ring and the fan hub are coaxially connected in sequence.

[0012] Preferably, the front-end variable pitch system and the rear-end variable pitch system each comprise a three-blade hub, and each blade shaft is provided with a double-slide platform mechanism, and the double-slide platform mechanism is arranged along the axial direction of the blade shaft.

[0013] Preferably, the double-slide platform mechanism comprises a first slide platform and a second slide platform. The first sliding table is provided with a scale mark, and the second sliding table is used in cooperation with the first sliding table, and the screw clamping knob arranged on the second sliding table and the first sliding table is used in cooperation.

[0014] Preferably, when the screw clamping knob is in a locked state, the two sliding tables are relatively fixed, the blade pitch angle is kept at a set value, accurate manual adjustment and angle keeping are realized; when the screw clamping knob is in a released state, the double sliding table mechanism is freely rotated around the axis.

[0015] The beneficial technical effects of the present application are as follows: The present application provides a pool test model device for a double-rotor fan, The driving motor structure is compact and arranged in axial symmetry, can drive the fans on both sides at the same time, realizes cooperative or independent operation of the double-rotor fan, the motor two ends are connected with speed reducers respectively to realize speed reduction and torque output, and the torque and speed sensors are arranged at the motor shaft ends for real-time monitoring of the operation state, through accurate control of the motor direction and speed, the wind speed and airflow direction of the double-rotor fan can be flexibly adjusted, so that the starting efficiency and operation stability of the system are improved.

[0016] One of the two pieces has a scale for accurate adjustment of the pitch angle, and the other piece realizes locking or release control through the screw clamping knob; when the knob is locked, the blade angle is kept stable; When the knob is released, the sliding table can be self-adaptively rotated, so that the blade automatically adjusts the pitch angle under the action of fluid; the structure has the functions of manual setting and self-adaptive variable pitch, is simple in structure, flexible in response, and can realize efficient energy capture and stable operation without a complex control system, and the reliability and adaptability of the system are significantly improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a preferred embodiment of a double-rotor fan cabin schematic diagram of a pool test model device for a double-rotor fan according to the present application; Figure 2 It is a preferred embodiment of a driving system schematic diagram of a pool test model device for a double-rotor fan according to the present application; Figure 3 It is a preferred embodiment of a variable pitch system schematic diagram of a pool test model device for a double-rotor fan according to the present application; Figure 4 It is a preferred embodiment of a double-rotor fan whole machine schematic diagram of a pool test model device for a double-rotor fan according to the present application; Figure 5 It is a preferred embodiment of a double-rotor fan upper structure schematic diagram of a pool test model device for a double-rotor fan according to the present application.

[0018] In the figure: 1, driver frame; 2, front rotor; 201, front end variable pitch system; 202, blade; 203, blade shaft; 2011, three-blade hub; 2012, double sliding table mechanism; 20121, first sliding table; 20122, second sliding table; 20123, screw clamping knob; 3, rear rotor; 301, rear end variable pitch system; 4, front end driving system; 401, torque sensor; 402, driving motor; 403, speed reducer; 404, shaft coupling; 405, electric slip ring; 406, hollow servo cup tail seat; 407, L-shaped support; 408, speed reducer output shaft; 409, electric slip ring input shaft; 410, driving shaft; 5, rear end driving system; 6, driving system; 7, nacelle; 8, six-component force sensor; 9, tower; 10, platform. DETAILED DESCRIPTION

[0019] In order to make the technical solution of the present application more clear and explicit to those skilled in the art, the present application will be described in further detail below in conjunction with examples and drawings, but the embodiments of the present application are not limited thereto.

[0020] Example 1: as shown in Figure 1 , Figure 2 , Figure 4 and Figure 5 , the water tank test model device for the double-rotor fan provided in the present embodiment includes a front rotor 2 and a rear rotor 3, the front rotor 2 is arranged at the front end of the nacelle 7, and the rear rotor 3 is arranged at the rear end of the nacelle 7. The driving system 6 is provided with a front end driving system 4 and a rear end driving system 5 corresponding to the front rotor 2 and the rear rotor 3, respectively. The driving system 6 drives the double-rotor fan to rotate through shaft transmission connection, and the front end variable pitch system 201 and the rear end variable pitch system 301 are used for adjusting the pitch angle of the blades 202 of the front rotor 2 and the rear rotor 3, respectively.

[0021] As shown in Figure 1 , Figure 2 , Figure 4 and Figure 5 , the rear rotor 3 is arranged at the rear end of the nacelle, and the overall structure of the entire device is arranged in axial symmetry, the device further includes a driving system 6, and a front end variable pitch system 201 and a rear end variable pitch system 301 corresponding to the front rotor 2 and the rear rotor 3, respectively, and a six-component force sensor 8. The driving system 6 drives the double-rotor fan to rotate through shaft transmission connection, is used for driving the double-rotor fan to rotate according to the set rotation speed and rotation direction, and the front-end variable pitch system 201 and the rear-end variable pitch system 301 are respectively used for adjusting the blade pitch angle of the front-end rotor 2 and the rear-end rotor 3, so that flexible control of the blade pitch is realized, and the six-component force sensor 8 is arranged at the connecting position of the lower end of the nacelle and the upper end of the tower, and is used for detecting the stress state of the tower top. In the embodiment, the driving system 6 includes the front-end driving system 4 and the rear-end driving system 5, and the driver frame 1, the front-end driving system 4 is used for driving the front-end rotor 2 to rotate, the rear-end driving system 5 is used for driving the rear-end rotor 3 to rotate, and the front-end driving system 4 and the rear-end driving system 5 are the same in structure and function and are axially symmetrically arranged as a whole.

[0022] Embodiment 2: The scheme in embodiment 1 is further introduced in combination with a specific working mode, and details are described below: As shown in Figure 1 , Figure 2 and Figure 3 , as a preferred embodiment, on the basis of the above mode, further, the driving system 6 includes the front-end driving system 4, the rear-end driving system 5 and the driver frame 1; The front-end driving system 4 is used for driving the front-end rotor 2 to rotate, the rear-end driving system 5 is used for driving the rear-end rotor 3 to rotate, and the front-end driving system 4 and the rear-end driving system 5 are axially symmetrically arranged; Both ends of the driver frame 1 are symmetrically provided with the front-end rotor 2 and the rear-end rotor 3; The front-end driving system 4 and the rear-end driving system 5 are composed of a driving motor 402, a torque sensor 401, a hollow servo cup tail seat 406, an L-shaped support 407, a speed reducer 403, a shaft coupling 404, an electric slip ring 405, a speed reducer output shaft 408, an electric slip ring input shaft 409 and a driving shaft 410; The driving motor 402 is fixedly connected to the hollow servo cup tail seat 406 and the driver frame 1 by bolts, and the driving motor 402 is coaxially connected to the speed reducer 403; As shown in Figure 1 , Figure 2 and Figure 3 , the speed reducer 403 is fixedly connected to the driver frame 1 by the L-shaped support 407, and the speed reducer output shaft 408 is coaxially connected to the shaft coupling 404; The shaft coupling 404 is used for connecting the speed reducer output shaft 408 and the electric slip ring input shaft 409, the output shaft of the electric slip ring is the driving shaft 410 of the rotor, and the shaft coupling 404, the electric slip ring 405 and the fan hub 2011 are coaxially connected in sequence; A driving motor 402 is bolted to the driver frame 1 through the hollow servo cup tail seat 406, and the driving motor 402 is coaxially connected with a speed reducer 403, the speed reducer 403 is bolted to the driver frame 1 through the L-shaped support 407, for reducing the output rotating speed of the motor and increasing the output torque, and the output shaft 408 of the speed reducer is coaxially connected with the shaft coupling 404; The shaft coupling 404 is used for connecting the output shaft 408 of the speed reducer with the input shaft 409 of the electric slip ring, and compensating the installation error; the shaft coupling 404 is coaxially connected with the electric slip ring 405 and the fan hub 2011 in sequence, to realize the transmission of electric energy and signal and the controlled rotation of the fan hub.

[0023] Embodiment 3: The schemes in Embodiment 1 and Embodiment 2 are further introduced in combination with specific working modes, and details are described below: As shown in Figure 1 , Figure 3 , Figure 4 and Figure 5 , as a preferred embodiment, on the basis of the above mode, further, the front-end variable pitch system 201 and the rear-end variable pitch system 301 each include a three-blade hub 2011, and a double slide table mechanism 2012 is arranged on each blade shaft 203 and axially arranged along the blade shaft 203; The double slide table mechanism 2012 includes a first slide table 20121 and a second slide table 20122; The first slide table 20121 is provided with a scale mark, and the second slide table 20122 is used in cooperation with the first slide table 20121, and a screw clamping knob 20123 arranged on the second slide table 20122 and the first slide table 20121 is used in cooperation; When the screw clamping knob 20123 is in a locked state, the two slide tables are relatively fixed, the blade pitch angle is kept at a set value, accurate manual adjustment and angle keeping are realized; When the screw clamping knob 20123 is in a loosened state, the double slide table mechanism 2012 is freely rotated around the axis; As shown in Figure 1 , Figure 3 , Figure 4 and Figure 5 , locking or releasing control is realized through the screw clamping knob 20123 arranged thereon, when the screw clamping knob 20123 is in a locked state, the two slide tables are relatively fixed, the blade pitch angle is kept at a set value, accurate manual adjustment and angle keeping are realized; when the screw clamping knob 20123 is in a loosened state, the double slide table mechanism 2012 can be freely rotated around the axis, so that the blade realizes self-adaptive variable pitch adjustment according to external airflow changes or torque changes; The driving shaft of the driving system 6 is connected with the rotating shaft of the fan rotor through a coupling 404 for transmitting torque and realizing coaxial connection of the two shafts, the first sliding table 20121 of the double sliding table mechanism 2012 is fixed with the fan hub 2011 through bolts, the second sliding table 20122 is fixedly connected with the blade shaft through bolts, and the first sliding table 20121 and the second sliding table 20122 are connected through a coaxial structure, so that the overall structure of the device is compact, the internal space of the cabin can be reasonably utilized, and the installation and debugging of the model are facilitated.

[0024] The above is only further embodiments of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make equivalent replacement or change according to the technical scheme and concept of the present application within the disclosed range, which belongs to the protection scope of the present application.

Claims

1. A water tank test model device for a dual-rotor fan, comprising a front rotor (2) and a rear rotor (3), wherein the front rotor (2) is disposed at the front end of the nacelle (7) and the rear rotor (3) is disposed at the rear end of the nacelle (7); Its features are: The drive system (6) is provided with a front drive system (4) and a rear drive system (5) corresponding to the front rotor (2) and the rear rotor (3), respectively. The drive system (6) drives the dual rotor fan to rotate through the shaft transmission connection. The front pitch system (201) and the rear pitch system (301) are used to adjust the blade (202) pitch angle of the front rotor (2) and the rear rotor (3), respectively.

2. The water tank test model device for a dual-rotor fan according to claim 1, characterized in that: The drive system (6) includes a front-end drive system (4), a back-end drive system (5), and a driver frame (1). The front drive system (4) is used to drive the front rotor (2) to rotate, and the rear drive system (5) is used to drive the rear rotor (3) to rotate. The front drive system (4) and the rear drive system (5) are arranged in an axisymmetric manner.

3. The water tank test model device for a dual-rotor fan according to claim 1, characterized in that: The front rotor (2) and the rear rotor (3) are symmetrically mounted at both ends of the drive frame (1).

4. The water tank test model device for a dual-rotor fan according to claim 3, characterized in that: The front-end drive system (4) and the rear-end drive system (5) consist of a drive motor (402), a torque sensor (401), a hollow servo cup tailstock (406), an L-shaped bracket (407), a reducer (403), a coupling (404), an electric slip ring (405), a reducer output shaft (408), an electric slip ring input shaft (409), and a drive shaft (410); The drive motor (402) is bolted to the hollow servo cup tailstock (406) and the driver frame (1), and the drive motor (402) is coaxially connected to the reducer (403).

5. The water tank test model device for a dual-rotor fan according to claim 4, characterized in that: The reducer (403) is bolted to the driver frame (1) via the L-shaped bracket (407), and the reducer output shaft (408) is coaxially connected to the coupling (404); The coupling (404) is used to connect the output shaft (408) of the reducer and the input shaft (409) of the electric slip ring. The output shaft of the electric slip ring (405) is the drive shaft (410) of the rotor. The coupling (404), the electric slip ring (405) and the wind turbine hub (201) are connected coaxially in sequence.

6. The water tank test model device for a dual-rotor fan according to claim 2, characterized in that: Both the front pitch system (201) and the rear pitch system (301) include a three-bladed hub (2011), and each blade shaft (203) is provided with a double slide mechanism (2012), which is arranged axially along the blade shaft (203).

7. The water tank test model device for a dual-rotor fan according to claim 6, characterized in that: The dual-slide mechanism (2012) includes a first slide (20121) and a second slide (20122); The first slide (20121) is marked with scale markings, and the second slide (20122) is used in conjunction with the first slide (20121). The second slide (20122) is used in conjunction with the first slide (20121) by a spiral clamping knob (20123) set on the second slide (20122) and the first slide (20121).

8. The water tank test model device for a dual-rotor fan according to claim 7, characterized in that: When the screw clamping knob (20123) is in the locked state, the two slides are fixed relative to each other, and the blade pitch angle is maintained at the set value, realizing precise manual adjustment and angle maintenance; when the screw clamping knob (20123) is in the released state, the double slide mechanism (2012) rotates freely around the axis.

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