A new type of vertical axis ring wind wheel fan

Abstract

The utility model provides a novel vertical axis ring wind wheel fan, and the fan includes wind wheel subassembly and guide rail support, wind wheel subassembly includes wind wheel frame, a plurality of inclined supports and blade, the inclined support is located on the wind wheel frame, the blade is located on the wind wheel frame, ring beam subassembly is connected with wind wheel frame subassembly rotation, and the wind wheel frame is separated from the tower column to make wind wheel subassembly lightweight and reduce the starting inertia of wind wheel frame, the blade is installed on the wind wheel frame, the blade quantity can increase at will but the weight increases not much, and the whole fan adopts the modularization design, makes the cost minimization, and the installation is convenient.

Description

Technical Field

[0001] This utility model belongs to the technical field of wind power machinery and equipment, and specifically relates to a novel vertical axis annular wind turbine. Background Technology

[0002] Vertical axis wind turbines are classified into drag-type, lift-type, and hybrid lift-drag type. While drag-type vertical axis wind turbines are simple, reliable, and easy to install and maintain, they require a tip speed ratio of around 0.5 to 0.9 to achieve high power output. This means the blade speed is relatively low, with the outer edge of the rotor having a linear velocity only slightly more than half the wind speed. If the rotor diameter is large, the rotational speed will be very low. Only half of the wind-receiving area of ​​a drag-type wind turbine is utilized, with the other half often performing negative work. Therefore, drag-type vertical axis wind turbines have a low wind energy conversion efficiency, generally not exceeding 0.15. Although S-type drag-type wind turbines can reach 0.25, their large blades make manufacturing, transportation, and installation difficult, preventing their use in large wind turbines. This limits the widespread application of drag-type wind turbines.

[0003] Currently, most common H-type vertical axis fans use a central shaft as the center of rotation, with cantilever beams supporting the blades for rotation. This structure has the following disadvantages:

[0004] 1) Because the blades are supported by two main beams, and multiple blades and main beams are installed on the central column to form a cylindrical wind turbine, the greater the load on the blades, the greater the load on the main beams; the heavier the wind turbine, the greater its starting inertia. The higher the starting wind speed of the wind turbine, the lower its wind energy conversion efficiency.

[0005] 2) If the load on the blades is reduced by decreasing the chord length, the wind turbine's harvesting capacity will decrease. To ensure a certain harvesting capacity, the number of blades needs to be increased to achieve a certain solidity ratio. Increasing the number of blades also increases the number of main beams, leading to increased costs, increased rotor weight, and increased starting inertia. Utility Model Content

[0006] Purpose of the utility model: To overcome the above shortcomings, this utility model provides a novel vertical-axis annular wind turbine. It adopts an annular wind turbine design, with the ring beam assembly and wind turbine frame assembly rotatably connected. The wind turbine frame is separated from the tower column, making the wind turbine assembly lightweight and reducing the starting inertia of the wind turbine frame. The blades are mounted on the wind turbine frame, and the number of blades can be increased arbitrarily with minimal weight increase. The entire wind turbine adopts a modular design and truss structure, minimizing cost and facilitating installation. This utility model controls the wind turbine frame below the critical speed using optimal tip speed ratio control; above the critical speed, while tracking the maximum power point, the wind turbine frame speed simultaneously increases the reverse torque. Utilizing the stall characteristics of the wind turbine and the electric control brake to control the wind turbine speed, this allows the wind turbine to generate electricity normally and efficiently while controlling the wind turbine frame speed, avoiding runaway accidents.

[0007] Technical solution: To achieve the above objectives, this utility model provides a novel vertical axis annular impeller fan, including an impeller assembly and a guide rail support.

[0008] The wind turbine assembly includes a wind turbine frame, several inclined supports, and blades. The inclined supports are mounted on the wind turbine frame, and the blades are mounted on the wind turbine frame.

[0009] The guide rail support includes a tower column, a ring beam assembly, at least one set of motor modules, and several diagonal braces. The ring beam assembly passes through the tower column, the motor modules are mounted on the ring beam assembly, and the diagonal braces are mounted on the ring beam assembly.

[0010] The wind turbine frame is rotatably connected to the ring beam assembly.

[0011] Furthermore, the wind turbine frame includes an upper fixed ring, a middle roller ring, and a lower fixed ring, and the ring beam assembly includes an upper ring beam, a middle ring beam, and a lower ring beam;

[0012] The upper fixed ring, intermediate roller ring, and lower fixed ring are all provided with mounting holes for the blades to pass through. The inner surfaces of the upper and lower fixed rings are provided with guide wheel grooves, and the outer surfaces of the upper and lower ring beams are provided with guide wheels that mate with the guide wheel grooves. The intermediate roller ring is provided with rollers, and the intermediate ring beam is provided with guide rails that mate with the rollers. The wind turbine frame and the ring beam assembly achieve relative rotation through the engagement of the guide wheels and guide wheel grooves, and the engagement of the rollers and guide rails.

[0013] Furthermore, the inclined support is located between the upper fixed ring, the middle roller ring and the lower fixed ring, and the inclined brace is located between the upper ring beam, the middle ring beam and the lower ring beam. The inclined support and the inclined brace enhance the torsional resistance of the entire fan.

[0014] The upper fixing ring, the middle roller ring, and the lower fixing ring are all composed of multiple short sections and adopt a modular design, which facilitates transportation, assembly, and disassembly.

[0015] The upper ring beam, middle ring beam, and lower ring beam are all provided with through holes for the tower column to pass through.

[0016] Furthermore, the motor module includes a set of motors, a toothed belt, and a set of tension pulleys. The motors and tension pulleys are mounted on the intermediate ring beam. A pulley is mounted on the rotor shaft of the motor, and the toothed belt is wound around the pulleys and tension pulleys.

[0017] The inner side of the intermediate roller ring is provided with a guide groove, and the toothed belt cooperates with the guide groove. The torque is transmitted through the cooperation of the toothed belt and the guide groove on the intermediate roller ring. The rotation of the intermediate roller ring transmits the torque to the motor through the toothed belt. Since the diameter of the intermediate roller ring is large, the transmission ratio is large and the motor speed is high, the motor cost is reduced, the motor torque is reduced, and the efficiency is improved.

[0018] The motor has an external rotor and an inner stator with a central hole structure, and is equipped with an electric control brake.

[0019] Vertical axis wind turbines employ a stall-type impeller. At a given rotational speed, increasing wind speed leads to increased power output from the impeller; however, when the wind speed reaches a critical point, the power output decreases. This critical wind speed is the stall point. Once the turbine reaches its rated power, the impeller frame speed is controlled by both the reverse torque of the motor and the electric brake, causing the impeller frame to enter a stall state. When the impeller frame reaches the turbine's set value, the electric brake can be used to increase the braking torque, bringing the impeller frame to a complete stop.

[0020] Furthermore, it also includes a main control system, an anemometer, a converter, a transformer, and a battery. The anemometer is installed on the ring beam assembly and connected to the main control system. The main control system is interactively connected to the converter and the electric control brake.

[0021] The input terminal of the converter is connected to the motor, the output terminal of the converter is connected to the input terminal of the transformer, and the output terminal of the transformer is connected to the power grid or a battery.

[0022] The converter includes a turbine-side rectifier control unit and a grid-side inverter unit. The input terminal of the turbine-side rectifier control unit is connected to the output terminal of the motor, and the output terminal of the turbine-side rectifier control unit is connected to the input terminals of the battery and the grid-side inverter unit respectively. The output terminal of the grid-side inverter unit is connected to the power grid. The turbine-side rectifier control unit performs turbine-side rectification. When THD ≤ 5%, it controls the generator torque current based on the wind turbine speed and BMS information, providing constant power control and controlling the charging voltage and current, enabling four-quadrant operation. The grid-side inverter unit converts battery energy and generated energy into AC power, which is then fed into the power grid or used to control the motor to output mechanical energy.

[0023] Since the wind turbine's output voltage is constant, the motor's output power can be controlled by adjusting the inverter's output current. Increasing the output power increases the motor's reverse torque, thereby controlling the wind turbine's rotational speed. When the wind speed is too low and the turbine cannot start, the inverter can reverse-power the motor via the battery, providing starting power to the wind turbine. Once the turbine is rotating, the inverter switches back to inverter mode, feeding power to the battery (or the grid). When wind power generation is insufficient, the battery supplies power to users via the inverter.

[0024] Furthermore, the blade is a symmetrical blade, which has superior aerodynamic characteristics and advantages in production and molding. A set of screws is provided at the center of the blade, and the blade is fixed to the wind turbine frame by the screws.

[0025] The ratio of the total area of ​​a wind turbine blade to the area through which air passes (the swept area of ​​the rotor) is called the solidity ratio (volume ratio). The formula for calculating the solidity of a vertical axis wind turbine blade is:

[0026]

[0027] C is the blade chord length, N is the number of blades, R is the rotor radius, L is the blade length, and σ is the solidity ratio.

[0028] The load on the blades is related to the blade chord length and blade length; the wider the blade chord and the longer the blade, the greater the load. Blade length is a major factor affecting the swept surface of the rotor, while chord length has a significant impact on the wind load on the blades. To obtain greater kinetic energy, reducing the blade chord length and increasing the number of blades to increase the solidity ratio are effective measures to increase the efficiency of vertical axis wind turbines.

[0029] Furthermore, the tower column is a cone shape with a smaller top and a larger bottom and has multiple stepped surfaces, and a support beam is provided on the inner side of the ring beam assembly.

[0030] As can be seen from the above technical solution, this utility model has the following beneficial effects:

[0031] 1. This utility model provides a novel vertical axis annular wind turbine, which adopts an annular wind turbine design. The ring beam assembly and the wind turbine frame assembly are rotatably connected. The wind turbine frame is separated from the tower column, which makes the wind turbine assembly lightweight and reduces the starting inertia of the wind turbine frame. The blades are installed on the wind turbine frame. The number of blades can be increased at will without much increase in weight. The entire wind turbine adopts a modular design and truss structure, which minimizes cost and facilitates installation.

[0032] 2. Compared with traditional vertical axis fans, the diameter of the impeller frame in this utility model can be made larger. With the increase in the diameter of the impeller frame, the starting wind speed is reduced and the low wind speed characteristics of the fan are enhanced. On the other hand, the large diameter of the annular track on the impeller frame results in a large gear transmission ratio, a high motor speed, reduced motor cost, reduced motor torque, and improved efficiency.

[0033] 3. The multiple tower columns are arranged in a ring, and the ring beam assembly is equipped with a support beam, a diagonal brace, and a diagonal support on the wind turbine frame, which makes the wind turbine more stable, improves its torsional resistance, and strengthens its anti-overturning ability. Attached Figure Description

[0034] Figure 1 This is a structural schematic diagram of a novel vertical axis annular impeller fan according to the present invention;

[0035] Figure 2 This is a schematic diagram of the wind turbine frame assembly described in this utility model;

[0036] Figure 3This is a partial structural diagram of the upper (lower) fixing ring described in this utility model;

[0037] Figure 4 This is a partial structural schematic diagram of the intermediate roller ring described in this utility model;

[0038] Figure 5 This is a schematic diagram of the structure of the guide rail bracket described in this utility model;

[0039] Figure 6 This is a schematic diagram of the upper (lower) ring beam of the present invention;

[0040] Figure 7 This is a schematic diagram of the structure of the intermediate ring beam described in this utility model;

[0041] Figure 8 This is a cross-sectional view of the mating point between the intermediate ring beam and the intermediate roller ring described in this utility model.

[0042] Figure 9 This is a schematic diagram of the structure of the motor module described in this utility model;

[0043] Figure 10 This is a schematic diagram of the structure of the tower column described in this utility model;

[0044] Figure 11 This is a diagram of the integrated wind, solar, and energy storage system architecture described in this utility model.

[0045] In the diagram: 1-Wind rotor assembly, 11-Wind rotor frame, 111-Upper fixing ring, 112-Intermediate roller ring, 1121-Roller, 1122-Guide groove, 113-Lower fixing ring, 114-Guide wheel groove, 12-Diagonal support, 13-Blade, 2-Guide rail bracket, 21-Tower column, 22-Ring beam assembly, 221-Upper ring beam, 222-Intermediate ring beam, 2221-Guide rail, 223-Lower ring beam, 224-Guide wheel, 225-Support beam, 23-Motor module, 231-Motor, 232-Toothed belt, 233-Tension wheel, 24-Diagonal brace. Detailed Implementation

[0046] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0047] Example 1:

[0048] like Figure 1 As shown, a novel vertical-axis annular wind turbine includes a wind turbine assembly 1 and a guide rail support 2.

[0049] The wind turbine assembly 1 includes a wind turbine frame 11, several inclined supports 12 and blades 13. The inclined supports 12 are disposed on the wind turbine frame 11 and the blades 13 are disposed on the wind turbine frame 11.

[0050] The guide rail support 2 includes a tower column 21, a ring beam assembly 22, at least one set of motor modules 23 and several diagonal braces 24. The ring beam assembly 22 is installed through the tower column 21, the motor modules 23 are installed on the ring beam assembly 22, and the diagonal braces 24 are installed on the ring beam assembly 22.

[0051] The wind turbine frame 11 is rotatably connected to the ring beam assembly 22.

[0052] like Figure 2 As shown, the wind turbine frame 11 includes an upper fixed ring 111, a middle roller ring 112 and a lower fixed ring 113, and the ring beam assembly 22 includes an upper ring beam 221, a middle ring beam 222 and a lower ring beam 223;

[0053] like Figures 3-8 As shown, the upper fixing ring 111, the middle roller ring 112, and the lower fixing ring are all provided with mounting holes through which the blade 13 can pass. The inner surfaces of the upper fixing ring 111 and the lower fixing ring 113 are provided with guide wheel grooves 114. The outer surfaces of the upper ring beam 221 and the lower ring beam 223 are provided with guide wheels 224, which cooperate with the guide wheel grooves 114. The middle roller ring 112 is provided with rollers 1121, and the middle ring beam 222 is provided with guide rails 2221, which cooperate with the rollers 1121.

[0054] like Figure 2 , Figure 5 As shown, the inclined support 12 is disposed between the upper fixed ring 111, the middle roller ring 112 and the lower fixed ring 113, and the inclined support frame 24 is disposed between the upper ring beam 221, the middle ring beam 222 and the lower ring beam 223;

[0055] The upper fixing ring 111, the middle roller ring 112 and the lower fixing ring 113 are all composed of multiple short sections;

[0056] The upper ring beam 221, the middle ring beam 222 and the lower ring beam 223 are all provided with through holes for the tower column 21 to pass through.

[0057] like Figure 9 As shown, the motor module 23 includes a set of motors 231, a toothed belt 232 and a set of tension pulleys 233. The motors 231 and tension pulleys 233 are mounted on the intermediate ring beam 222. The rotor shaft of the motor 231 is provided with a pulley, and the toothed belt 232 is wound around the pulley and tension pulley 233.

[0058] The inner side of the intermediate roller ring 112 is provided with a guide groove 1122, and the toothed belt 232 cooperates with the guide groove 1122;

[0059] The motor 231 has an outer rotor and an inner stator with a central hole structure, and is equipped with an electric control brake.

[0060] In addition, it also includes a main control system, an anemometer, a converter, a transformer and a battery. The anemometer is installed on the ring beam assembly 2 and connected to the main control system. The main control system is interactively connected to the converter and the electric control brake.

[0061] The input terminal of the converter is connected to the motor 231, the output terminal of the converter is connected to the input terminal of the transformer, and the output terminal of the transformer is connected to the power grid or a battery.

[0062] The converter includes a machine-side rectifier control unit and a grid-side inverter unit. The input terminal of the machine-side rectifier control unit is connected to the output terminal of the motor 231. The output terminal of the machine-side rectifier control unit is connected to the input terminals of the battery and the grid-side inverter unit, respectively. The output terminal of the grid-side inverter unit is connected to the power grid.

[0063] Specifically, the blade 13 is a symmetrical blade, and a set of screws is provided at the center of the blade 13, through which the blade 13 is fixed to the wind turbine frame 11.

[0064] like Figure 7 , Figure 10 As shown, the tower column 21 is a cone shape with a smaller top and a larger bottom and has multiple stepped surfaces, and the inner side of the ring beam assembly 22 is provided with a support beam 225.

[0065] Example 2:

[0066] The components not mentioned in this embodiment are the same as those in Embodiment 1. In addition, the assembly method of the motor module 23 and the intermediate roller ring 112 in this embodiment can also adopt a flexible connection. Specifically, the motor 231 is movably mounted on the intermediate ring beam 222, and a contact plate is provided below the rotor shaft of the motor 231. The contact plate is pressed into the guide groove 1122 by a spring. A rubber layer is provided on the outside of the contact plate, and an anti-slip layer is sprayed in the guide groove 1122. The torque is transmitted to the motor through the friction between the guide groove 1122 and the contact plate.

[0067] Example 3:

[0068] like Figure 11 As shown, the components not mentioned in this embodiment are the same as those in Embodiment 1. In addition, photovoltaic panels can be installed on the top of the tower column 21 to realize an integrated wind, solar and energy storage system.

[0069] In the system, the wind power generation output supplies power to users through an inverter; the DC power output from the photovoltaic modules supplies power to users through an inverter. When there is a surplus in power generation, the wind power generation part stores the electrical energy in the battery after passing through the machine-side rectifier control unit. Similarly, the photovoltaic power generation part directly supplies electrical energy to the battery. When there is a power shortage, the battery supplies power to users through the grid-side inverter unit of the inverter.

[0070] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be considered within the protection scope of the present utility model.

Claims

1. A novel vertical-axis annular impeller fan, characterized in that, It includes a wind turbine assembly (1) and a guide rail bracket (2). The wind turbine assembly (1) includes a wind turbine frame (11), several inclined supports (12) and blades (13). The inclined supports (12) are mounted on the wind turbine frame (11), and the blades (13) are mounted on the wind turbine frame (11). The guide rail support (2) includes a tower column (21), a ring beam assembly (22), at least one set of motor modules (23) and several diagonal braces (24). The ring beam assembly (22) is installed through the tower column (21), the motor modules (23) are installed on the ring beam assembly (22), and the diagonal braces (24) are installed on the ring beam assembly (22). The wind turbine frame (11) is rotatably connected to the ring beam assembly (22).

2. The novel vertical-axis annular impeller fan according to claim 1, characterized in that, The wind turbine frame (11) includes an upper fixed ring (111), a middle roller ring (112) and a lower fixed ring (113), and the ring beam assembly (22) includes an upper ring beam (221), a middle ring beam (222) and a lower ring beam (223). The upper fixing ring (111), the middle roller ring (112) and the lower fixing ring are all provided with mounting holes through which the blade (13) can pass. The inner side of the upper fixing ring (111) and the lower fixing ring (113) are provided with guide wheel grooves (114). The outer side of the upper ring beam (221) and the lower ring beam (223) are provided with guide wheels (224). The guide wheels (224) cooperate with the guide wheel grooves (114). The middle roller ring (112) is provided with rollers (1121). The middle ring beam (222) is provided with guide rails (2221). The rollers (1121) cooperate with the guide rails (2221).

3. A novel vertical-axis annular impeller fan according to claim 2, characterized in that, The inclined support (12) is located between the upper fixed ring (111), the middle roller ring (112) and the lower fixed ring (113), and the inclined support frame (24) is located between the upper ring beam (221), the middle ring beam (222) and the lower ring beam (223); The upper fixing ring (111), the middle roller ring (112), and the lower fixing ring (113) are all composed of multiple short sections; The upper ring beam (221), the middle ring beam (222), and the lower ring beam (223) are all provided with through holes for the tower column (21) to pass through.

4. A novel vertical-axis annular impeller fan according to claim 3, characterized in that, The motor module (23) includes a set of motors (231), a toothed belt (232) and a set of tension pulleys (233). The motors (231) and tension pulleys (233) are mounted on the intermediate ring beam (222). The rotor shaft of the motor (231) is provided with a pulley, and the toothed belt (232) is wound around the pulleys and tension pulleys (233). The inner side of the intermediate roller ring (112) is provided with a guide groove (1122), and the toothed belt (232) cooperates with the guide groove (1122); The motor (231) is an outer rotor with a central hole structure for the inner stator, and is equipped with an electric control brake.

5. A novel vertical-axis annular impeller fan according to claim 4, characterized in that, It also includes a main control system, an anemometer, a converter, a transformer and a battery. The anemometer is installed on the ring beam assembly (22) and connected to the main control system. The main control system is interconnected with the converter and the electric control brake. The input end of the converter is connected to the motor (231), the output end of the converter is connected to the input end of the transformer, and the output end of the transformer is connected to the power grid or the battery.

6. A novel vertical-axis annular impeller fan according to claim 5, characterized in that, The converter includes a machine-side rectifier control unit and a grid-side inverter unit. The input terminal of the machine-side rectifier control unit is connected to the output terminal of the motor (231). The output terminal of the machine-side rectifier control unit is connected to the input terminals of the battery and the grid-side inverter unit, respectively. The output terminal of the grid-side inverter unit is connected to the power grid.

7. A novel vertical-axis annular impeller fan according to claim 1, characterized in that, The blade (13) is a symmetrical blade, and a set of screws is provided at the center of the blade (13), and the blade (13) is fixed to the wind turbine frame (11) by the screws.

8. A novel vertical-axis annular impeller fan according to claim 1, characterized in that, The tower column (21) is a cone shape with a smaller top and a larger bottom and has multiple stepped surfaces. The inner side of the ring beam assembly (22) is provided with a support beam (225).

Images