CN114414193A - Drive support device for scale model test of vertical axis fan - Google Patents

Abstract

The invention provides a driving support device for a scale model test of a vertical axis fan, comprising a frame body, a power mechanism and a slip ring mechanism; the power mechanism is drive-connected with the slip ring mechanism through the frame body . The present invention is a driving support device for a scale model test of a vertical axis fan, which can fix the fan body on the bottom platform and drive the fan body to run smoothly at a target speed; at the same time, the movement of the sensor cable during rotation can be solved. In addition, using the modular design concept, the drive motor, transmission mechanism, coupling and other components can be flexibly replaced according to different test needs, which has a certain universality.

Description

Drive support device for scale model test of vertical axis fan

technical field

The invention relates to the field of wind power generators, in particular to a drive support device used for scale model test of a vertical axis fan.

Background technique

In recent years, the excessive consumption of traditional fossil energy such as oil and coal has caused great damage to the ecological environment. At present, the world has reached a general consensus on vigorously developing green and environmentally friendly clean energy. As a clean, pollution-free and renewable green new energy, wind power is recognized by more and more people. Wind turbines are currently the most widely used wind energy development and utilization equipment. According to the spatial relationship between the rotation axis of the wind wheel and the direction of flow or the ground, the fans can be divided into horizontal axis fans and vertical axis fans. Due to the relatively high conversion efficiency of wind power and relatively low construction cost, horizontal axis wind turbines occupy a dominant position in the current wind power market, and related projects and studies are mostly carried out based on horizontal axis wind turbines. However, with the advent of lift-type vertical-axis fans, the wind energy utilization factor of vertical-axis fans has increased significantly, even surpassing some horizontal-axis fans. At the same time, with the large-scale development of fans, the installed capacity of a single machine continues to increase, and the problems of high stress load caused by the dead weight of horizontal axis fan blades are increasingly prominent. The vertical axis fan has once again attracted the attention and favor of scholars at home and abroad due to its advantages of low overall center of gravity, easy maintenance, no need for wind counters, and low noise.

In order to improve the work efficiency and prolong the service life, whether it is an onshore fixed wind turbine or an offshore floating wind turbine, it is necessary to carry out dynamic analysis and performance check of the wind turbine in the design and development stage. However, it is very expensive to build a real wind turbine, and it is very unrealistic to use the actual wind turbine to carry out research. The wind turbine model test according to a certain scale has the characteristics of relatively low cost and easy simulation and control of environmental loads, and has become an important means of wind turbine development and performance analysis.

In the fan model test, it is generally necessary to set the drive motor to drive the wind rotor to run at the target speed. Therefore, in the vertical axis fan model test, the first technical problem to be solved is how to select and arrange the drive system, so that the wind rotor can rotate smoothly at the target speed, and at the same time, what connection method is used to fix the model and the bottom platform. In addition, there are many physical quantities involved in the operation of wind turbines. To measure these physical quantities, various types of sensors need to be selected, and the motion interference relationship between components needs to be considered. Among them, obtaining the load conditions of the rotating blades and the transverse struts in the wind field can be used to evaluate the accuracy of the numerical simulation, which has a constructive role in the analysis of the aerodynamic characteristics of the model fan.

In the current model tests of vertical axis fans available for reference, the rotating shaft of the drive motor is directly connected to the model tower of the fan and arranged directly below the model fan. This coaxial driving method has the advantages of simple structure and small size. However, since the main body of the wind rotor is rotating, and the driving motor and the supporting structure are fixed, the sensor cable arranged on the rotating fan will interfere with the fixed structure, so it is difficult to measure the load on the rotating blade with this driving support method. .

SUMMARY OF THE INVENTION

In view of the above-mentioned deficiencies in the prior art, the present invention provides a driving support device for a scale model test of a vertical axis fan, which can fix the main body of the fan on the bottom platform, and can drive the main body of the fan to run smoothly at a target rotational speed; Solve the problem of motion interference of the sensor cable when rotating; in addition, adopting the modular design concept, the drive motor, transmission mechanism, coupling and other components can be flexibly replaced according to different test needs, which has a certain universality.

In order to achieve the above purpose, the present invention provides a driving support device for a scale model test of a vertical axis fan, comprising a frame body, a power mechanism and a slip ring mechanism; the power mechanism is connected to the frame body through the frame body and the Slip ring mechanism drive connection.

Preferably, the frame generally includes a main shaft frame, a main shaft, an inner end cover, two frame side plates, a sensor mounting plate and a bearing retaining ring; the frame side plates are symmetrically connected to both sides of the main shaft frame ; The main shaft is rotatably connected to the main shaft frame through two ball bearings and is passed through the inner end cover and the bearing retaining ring, and the inner end cover and the bearing retaining ring are opposite to the main shaft. Axial positioning; the sensor mounting plate is connected between the bottoms of the two frame side plates; the main shaft is hollow.

Preferably, the frame side plates are formed with several weight-reducing holes.

Preferably, the sensor mounting plate is screwed and fixed to the frame side plate; a plurality of bolt holes are formed on the surface of the sensor mounting plate.

Preferably, a plurality of waterproof shell connecting screw holes are left around and at the top of the frame as a whole.

Preferably, the power mechanism includes a driving motor, a transmission mechanism and a main shaft tower coupling; the driving motor is screwed and fixed on the frame as a whole and is located on one side of the main shaft; the main shaft tower The coupling is detachably connected to the top end of the main shaft; the driving motor is connected to the main shaft and the coupling of the main shaft tower through the transmission mechanism.

Preferably, the slip ring mechanism includes a slip ring main shaft coupling, a slip ring device and a slip ring stator connection block; the main shaft is connected to the slip ring device through the slip ring main shaft coupling, and the The slip ring device is arranged directly below the main shaft and is arranged concentrically with the main shaft; the slip ring stator connecting block is screwed on the side plate of the frame; the slip ring stator of the slip ring device is fixed on the slip ring stator Connector.

The present invention has the following beneficial effects due to the adoption of the above technical solutions:

The overall frame adopts an integrated design, which takes into account the lightweight of the device while ensuring the structural strength. A hollow main shaft is arranged inside the frame. Considering the possible eccentricity problem when the vertical axis fan model rotates, the main shaft adopts the positioning method of the upper and lower double ball bearings and the bearing end cover, which ensures the concentricity of the rotating mechanism while transmitting the movement. In order to solve the problem of the arrangement conflict between the output shaft of the power system and the slip ring device, the drive scheme of the power system offset is innovatively adopted. The power system can be driven by a motor, and the speed of the rotor can be controlled by changing the output speed of the motor. The transmission system is arranged on the top of the overall frame, which can be gear transmission or belt transmission, and drives the wind wheel to rotate through the main shaft tower coupling. In order to solve the problem of movement interference between the sensor cable and the fixing device during the rotation movement, and to realize the load measurement of the blade of the rotating fan, a slip ring mechanism is added to the device. The slip ring stator connecting block is integrally connected with the frame, and the slip ring main shaft connecting sleeve connects the main shaft and the slip ring rotor. At the same time, the cables of the slip ring device are arranged inside the hollow main shaft and the model tower, which improves the safety of signal transmission and avoids the influence of the slip ring harness on the aerodynamic performance of the fan model. There are bolt holes connected to the six-component force sensor at the bottom of the overall frame, which can be used to fix the fan model and measure the overall load of the fan. In addition, considering that water may splash above the floating platform during the model test of the floating fan pool, in order to protect the electronic equipment and components, the driving support device must have a certain waterproof capability. To this end, the surrounding and top of the overall frame are provided with waterproof casing connection holes connected to the waterproof casing, and an acrylic waterproof casing can be mounted to achieve a certain degree of waterproof effect.

Description of drawings

Fig. 1 is the structural schematic diagram of the first direction of the driving support device used for the scale model test of the vertical axis fan according to the embodiment of the present invention;

Fig. 2 is the structural schematic diagram of the second direction of the driving support device used for the scale model test of the vertical axis fan according to the embodiment of the present invention;

FIG. 3 is a side view of a driving support device used for a scale model test of a vertical axis fan according to an embodiment of the present invention.

Detailed ways

1 to 3 of the accompanying drawings, preferred embodiments of the present invention are given and described in detail, so that the functions and features of the present invention can be better understood.

Please refer to FIGS. 1 to 3 , a driving support device for a scaled model test of a vertical axis fan according to an embodiment of the present invention includes a frame body 1 , a power mechanism 2 and a slip ring mechanism 3 ; the power mechanism 2 passes through The frame body 1 is drivingly connected with the slip ring mechanism 3 .

The frame body 1 includes a main shaft frame 11 , a main shaft 12 , an inner end cover 13 , two frame side plates 14 , a sensor mounting plate 15 and a bearing retaining ring 16 ; the frame side plates 14 are symmetrically connected to both sides of the main shaft frame 11 ; The main shaft 12 is rotatably connected to the main shaft frame 11 through two ball bearings and passes through the inner end cover 13 and the bearing retaining ring 16, and the inner end cover 13 and the bearing retaining ring 16 are axially positioned on the main shaft 12; sensor mounting plate 15 is connected between the bottoms of the two frame side plates 14; the main shaft 12 is hollow.

The frame side plate 14 is formed with a number of weight-reducing holes, and the frame side plate 14 adopts a light-weight design of openings, so as to reduce the structural weight on the premise of ensuring the structural strength.

The sensor mounting plate 15 is screwed and fixed with the frame side plate 14; the surface of the sensor mounting plate 15 is formed with several bolt holes, which can be connected with the six-component force sensor or the fixed foundation.

A plurality of waterproof shell connecting screw holes are left around and at the top of the frame body 1, and the acrylic waterproof shell can be connected to achieve a certain degree of waterproof effect.

The power mechanism 2 includes a driving motor 21, a transmission mechanism 22 and a main shaft tower coupling 23; the driving motor 21 is screwed and fixed on the frame body 1 and is located on one side of the main shaft 12; the main shaft tower coupling 23 is detachable It is connected to the top of the main shaft 12; the drive motor 21 is connected to the main shaft 12 and the main shaft tower shaft coupling 23 through the transmission mechanism 22.

The slip ring mechanism 3 includes a slip ring main shaft coupling 31, a slip ring device 32 and a slip ring stator connection block 33; the main shaft 12 is connected to the slip ring device 32 through the slip ring main shaft coupling 31, and the slip ring device 32 is arranged in The main shaft 12 is directly below and concentrically arranged with the main shaft 12, which is used to solve the problem of movement interference between the sensor cable and the fixed structure during the rotation process, and can be used to measure the rotating blade load with the measuring device; the slip ring stator connection block 33 is screwed on the The frame side plate 14 ; the slip ring stator of the slip ring device 32 is fixed on the slip ring stator connection block 33 .

A driving support device for a scaled model test of a vertical axis fan according to an embodiment of the present invention, the installation sequence is as follows:

1. Assemble the overall frame 1, and install the drive motor 21;

2. Gear installation on the transmission shaft side and gear installation on the motor side;

3. Check the installation condition, the two shafts should rotate smoothly and engage stably;

4. Install the main shaft coupling 23 into the main shaft 12 and press it into the shaft shoulder;

5. Install the slip ring stator on the slip ring stator connection block 33;

6. Put the slip ring main shaft coupling 31 into the main shaft 12 and adjust the circumferential position, install the fastening screws, be careful not to tighten them;

7. Pass the slip ring cable through the through hole of the main shaft 12, install the rotor into the connecting sleeve, and tighten the four fastening screws of the rotor;

8. Adjust the position of the slip ring device 32, tighten the fastening screws of the slip ring main shaft coupling 31 and the main shaft 12, and at the same time tighten the installation screws of the slip ring stator connecting block 33 and the frame side plate 14;

9. Fix the drive support device on the platform or the six-component force sensor;

8. If the pool test is performed, an acrylic waterproof casing can be installed around the device.

A driving support device for a scale model test of a vertical axis fan according to an embodiment of the present invention has the following innovations:

1. The drive scheme of the power system offset is adopted, the drive motor 21 is no longer arranged directly under the fan tower, leaving an arrangement space for the slip ring device 32, which solves the arrangement of the power system output shaft and the slip ring device 32 conflict issues.

2. When the model wind wheel rotates, the cables fixed on the model blades and cross braces will encounter winding problems. In order to solve this problem, a slip ring device 32 is introduced to communicate and transmit the signal on the rotating wind wheel, which solves the problem of the movement of the sensor cable and the fixed foundation during the rotation of the wind wheel. Measurement of blade loads.

3. The modular design concept is adopted, and components such as the power mechanism 2, the transmission mechanism 22, and the coupling can be flexibly replaced according to different test needs, so it has strong universality.

4. Since the main shaft 12 of the frame body 1 and the slip ring main shaft coupling 31 are all hollow design, the slip ring device 32 and the sensor cable can be arranged inside the rotating shaft, which can effectively improve the safety of the transmission signal and avoid the Influence of slip ring harness on aerodynamic performance of fan model.

The present invention has been described in detail above with reference to the embodiments of the accompanying drawings, and those skilled in the art can make various modifications to the present invention according to the above description. Therefore, some details in the embodiments should not be construed to limit the present invention, and the present invention will take the scope defined by the appended claims as the protection scope of the present invention.

Claims (7)

1. A drive support device for a scaled model test of a vertical axis fan, characterized in that it comprises a frame body, a power mechanism and a slip ring mechanism; the power mechanism passes through the frame body and the slip ring. Mechanism drive connection. 2. The drive support device for a scaled model test of a vertical axis fan according to claim 1, wherein the frame generally comprises a main shaft frame, a main shaft, an inner end cover, two frame side plates, a a sensor mounting plate and a bearing retaining ring; the frame side plates are symmetrically connected to both sides of the main shaft frame; the main shaft is rotatably connected to the main shaft frame through two ball bearings and passes through the inner end In the cover and the bearing retaining ring, the inner end cover and the bearing retaining ring are axially positioned to the main shaft; the sensor mounting plate is connected between the bottoms of the two frame side plates; the main shaft is hollow . 3 . The driving support device for a scaled model test of a vertical axis fan according to claim 2 , wherein the frame side plate forms a plurality of weight-reducing holes. 4 . 4 . The driving support device for scaled model test of a vertical axis fan according to claim 2 , wherein the sensor mounting plate is screwed and fixed to the frame side plate; the surface of the sensor mounting plate is formed with several Bolt hole. 5 . The driving support device for a scale model test of a vertical-axis fan according to claim 2 , wherein a plurality of waterproof casing connection holes are left around and at the top of the overall frame. 6 . 6. The drive support device for a scaled model test of a vertical axis fan according to claim 2, wherein the power mechanism comprises a drive motor, a transmission mechanism and a main shaft coupling; the The drive motor is screwed and fixed on the frame as a whole and is located on one side of the main shaft; the main shaft tower coupling is detachably connected to the top end of the main shaft; the drive motor is connected to the main shaft through the transmission mechanism The main shaft is in transmission connection with the main shaft tower coupling. 7. The drive support device for a scaled model test of a vertical axis fan according to claim 2, wherein the slip ring mechanism comprises a slip ring spindle coupling, a slip ring device and a slip ring stator connecting block; the main shaft is connected to the slip ring device through the slip ring main shaft coupling, and the slip ring device is arranged directly below the main shaft and is arranged concentrically with the main shaft; the slip ring stator connection block is screwed connected to the frame side plate; the slip ring stator of the slip ring device is fixed on the slip ring stator connection block.

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