Energy storage wind power generation equipment and energy storage method

Abstract

The present invention provides an energy storage wind power generation device and an energy storage method, which relate to the field of energy storage wind power generation, and include a frame, wherein the frame is provided with a chamber with an opening exposed upward, water is injected into the chamber, and a main shaft is arranged upwardly with the chamber as the bottom and traversing the frame, wherein both ends of the main shaft are respectively combined with an impeller and a generator set, and a runner is also arranged between the impeller and the generator set, wherein the runner includes a first sleeve sleeved on the main shaft and a plurality of sleeves in an annular array around the first sleeve, wherein the plurality of sleeves are located directly above the chamber with an opening exposed upward, and a plug plate is movably sleeved in the sleeve, and when the main shaft exceeds a limit rotation speed, the plug plate is extended outwardly relative to the sleeve and extends to the chamber with an opening exposed upward to contact with water.

Description

Technical Field

[0001] The present invention relates to the field of energy storage wind power generation, and in particular to energy storage wind power generation equipment and an energy storage method. Background Art

[0002] Wind turbines have strict rotor speed protection limits. Balancing the rotor speed within a safe operating range is an important measure for stabilizing the life of wind turbines. Currently, some wind turbines are used in conjunction with energy storage units. When there is excess power, the excess power is stored in various energy storage forms. During periods of power shortage, the stored power is then fed into the grid to maintain power output stability. Currently, there are energy storage methods including batteries, flywheels, and pumped storage. However, without exception, these energy storage methods and rotor speed protection mechanisms are two independent systems with no mutual integration. Therefore, electronic control units must be configured with separate control systems. The entire control process is complex and difficult to manage. Therefore, using pumped storage as an example, a wind turbine generator system combining rotor speed protection with energy storage is proposed. Summary of the Invention

[0003] The purpose of the present invention is to provide an energy storage wind power generation device and energy storage method to solve the technical problem that there are energy storage methods including batteries, flywheels, pumped storage, etc., but without exception, the above energy storage methods and impeller speed protection mechanisms are two independent systems with no points of fit between them. Therefore, it is necessary to configure the corresponding control systems of the electronic control units in different categories, and the entire control process is complicated and difficult to manage.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A storage wind power generation device includes a frame having a chamber with an upwardly exposed opening, water is injected into the chamber, and a main shaft is arranged to cross the frame upward with the chamber as the bottom, an impeller and a generator set are respectively connected to the two ends of the main shaft, and a runner is also provided between the impeller and the generator set, wherein the runner includes a first sleeve mounted on the main shaft and a plurality of sleeves arranged in an annular array around the first sleeve, wherein the plurality of sleeves are located directly above the chamber with an upwardly exposed opening, and a plug plate is movably provided in the sleeve, which is used to extend outward relative to the sleeve and extend into the chamber with an upwardly exposed opening to contact water when the main shaft exceeds a limit speed.

[0006] Preferably, at least two partitions are provided in the frame, and the at least two partitions are fixed to the inner wall of the frame at intervals along the thickness direction of the frame to form the cavity with the opening exposed upward.

[0007] Preferably, a spring fixed to the bottom of the sleeve is installed at one end of the insert plate inserted into the sleeve, and the spring pulls the insert plate and retracts the insert plate completely into the sleeve when the spindle does not rotate at a limited speed.

[0008] Preferably, a first water tank is arranged outside the frame with a height higher than the water line of the upwardly exposed opening chamber, wherein the first water tank has a hydroelectric generator set, and the water inlet and outlet of the first water tank are both in the upwardly exposed opening chamber, so that when the plug-in plate contacts the water, the contacted water is transferred from the plug-in plate to the first water tank.

[0009] Preferably, a water inlet and a drain are provided in the chamber along the rotation path of the plug plate to the upwardly exposed opening, wherein the water inlet is located higher than the drain, and the water inlet and the drain are correspondingly connected to the water inlet and drain at the first water tank.

[0010] Preferably, a second water tank connected to the first water tank is further arranged outside the frame, wherein the second water tank has a hydroelectric generator set with the same specifications as the first water tank, and the second water tank has drainage, and the drainage is located in a cavity with an upwardly exposed opening.

[0011] Preferably, the first water tank is connected to the second water tank via a liquid distribution pipe, and the liquid distribution pipe is looped around to the generator set.

[0012] Preferably, the impeller includes a second sleeve installed at one end of the main shaft and a plurality of blades arranged in an annular array around the second sleeve.

[0013] Preferably, a plurality of supports are arrayed at the generator set, with both ends respectively fixed to the frame and the generator set.

[0014] A method for storing energy in an energy-storage wind power generation device, comprising the following steps:

[0015] 1) When the main shaft rotates at a speed exceeding a limit, the insert plate extends outward relative to the sleeve and extends into the upwardly exposed chamber to contact water;

[0016] 2) Using the plug board as the propelling part, water is introduced into the first water tank from the water inlet, so that when the power is insufficient, the hydroelectric generator set is used to drain water, and the electricity generated by the hydroelectric generator set is used to supplement the power shortage.

[0017] The beneficial effects of the present invention are:

[0018] 1. The present invention allows the inserting plate to extend outward relative to the sleeve and extend into the chamber with an upward opening to contact water, thereby limiting the rotation speed of the main shaft by the resistance formed by the inserting plate contacting the water.

[0019] 2. The present invention allows the plugboard to extend outward relative to the housing and extend into the upwardly exposed chamber to contact water. The plugboard then acts as a propelling member to guide water from the water inlet into the first water tank, so that when power is insufficient, the hydroelectric generator set can be used to drain water and generate electricity.

[0020] 3. In the present invention, the liquid distribution pipe is wound around the surface of the generator set, and then when the liquid distribution pipe is used to guide water from the first water tank into the second water tank, the flowing water indirectly contacts the generator set to remove excess heat from the generator set. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural diagram of the energy storage wind power generation equipment in the speed protection state;

[0022] Figure 2 This is a schematic diagram of the structure of an energy storage wind power generation device without speed limit;

[0023] Figure 3 for Figure 1 A schematic diagram of the structure from another perspective;

[0024] Figure 4 for Figure 3 Schematic diagram of the structure after removing the dispensing tube and water tank;

[0025] Figure 5 It is a structural diagram of the water tank and the fan frame;

[0026] Figure 6 for Figure 4 A three-dimensional cross-sectional schematic diagram after the support frame is removed;

[0027] Figure 7 is a schematic diagram of the structure of the runner;

[0028] Figure numerals: 1. first water tank; 2. frame; 3. partition; 4. impeller; 41. sleeve; 42. first sleeve; 43. plug-in plate; 5. impeller; 51. second sleeve; 52. blade; 6. main shaft; 7. support frame; 8. generator set; 9. second water tank; 10. liquid distribution pipe; 11. water inlet; 12. drain outlet. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific embodiments and drawings. However, the following embodiments are only preferred embodiments of the present invention and are not exhaustive. Based on the embodiments in the implementation manner, other embodiments obtained by those skilled in the art without making any creative work are all within the scope of protection of the present invention.

[0030] Specific embodiments of the present invention are described below with reference to the accompanying drawings.

[0031] Example 1

[0032] In this embodiment, an energy storage wind power generation device is proposed, which includes a frame 2, see Figure 1-4 The frame 2 is a circular ring, and there are two partitions 3 in the frame 2 that do not block the center of the frame 2. The two partitions 3 are fixed to the inner wall of the frame 2 at a certain distance along the thickness direction of the frame 2, thereby forming a cavity with an upward opening in the frame 2.

[0033] It should be noted that water not exceeding the waterline of the chamber is injected into the chamber with an opening exposed upward (not marked in the figure). In the above, the partition 3 does not block the center of the frame 2. For this reason, the chamber with an opening exposed upward is used as the bottom, and a main shaft 6 is set upward to cross the frame 2 (the main shaft 6 coincides with the center of the frame 2).

[0034] See also Figure 1-3 , impeller 5 and generator set 8 are respectively provided at both ends of the main shaft 6. It should be noted that the two ends of the main shaft 6 are respectively connected to the impeller 5 and the generator set 8, and a runner 4 is also provided between the impeller 5 and the generator set 8. Please refer to Figure 7 The runner 4 includes a first sleeve 42 sleeved on the main shaft 6 and a plurality of sleeves 41 in a circular array around the first sleeve 42, wherein the plurality of sleeves 41 are located directly above the chamber with an upwardly exposed opening, and an insert plate 43 is movably sleeved in the sleeve 41. It is further explained that the insert plate 43 is inserted into one side end of the sleeve 41, and a spring is installed and fixed to the bottom of the sleeve 41. The spring pulls the insert plate 43 and completely retracts the insert plate 43 into the sleeve 41 when the main shaft 6 does not rotate at a speed exceeding the limit.

[0035] According to the above description, when the main shaft 6 rotates at a speed exceeding the limit, the centrifugal force is greater than the pulling force provided by the spring, causing the insert plate 43 to extend outward relative to the sleeve 41 and extend into the upwardly exposed chamber to contact the water, thereby limiting the rotation speed of the main shaft 6 by the resistance formed by the insert plate 43 contacting the water.

[0036] Example 2

[0037] In this embodiment, an energy storage wind power generation device is proposed, which includes a frame 2, see Figure 1-4 The frame 2 is a circular ring, and there are two partitions 3 in the frame 2 that do not block the center of the frame 2. The two partitions 3 are fixed to the inner wall of the frame 2 at a certain distance along the thickness direction of the frame 2, thereby forming a cavity with an upward opening in the frame 2.

[0038] It should be noted that water not exceeding the waterline of the chamber is injected into the chamber with an opening exposed upward (not marked in the figure). In the above, the partition 3 does not block the center of the frame 2. For this reason, the chamber with an opening exposed upward is used as the bottom, and a main shaft 6 is set upward to cross the frame 2 (the main shaft 6 coincides with the center of the frame 2).

[0039] See also Figure 1-3 , impeller 5 and generator set 8 are respectively provided at both ends of the main shaft 6. It should be noted that the two ends of the main shaft 6 are respectively connected to the impeller 5 and the generator set 8, and a runner 4 is also provided between the impeller 5 and the generator set 8. Please refer to Figure 7 The runner 4 includes a first sleeve 42 sleeved on the main shaft 6 and a plurality of sleeves 41 in a circular array around the first sleeve 42, wherein the plurality of sleeves 41 are located directly above the chamber with an upwardly exposed opening, and an insert plate 43 is movably sleeved in the sleeve 41. It is further explained that the insert plate 43 is inserted into one side end of the sleeve 41, and a spring is installed and fixed to the bottom of the sleeve 41. The spring pulls the insert plate 43 and completely retracts the insert plate 43 into the sleeve 41 when the main shaft 6 does not rotate at a speed exceeding the limit.

[0040] In this embodiment, in order to combine the two systems of energy storage and limiting the rotational speed of the main shaft 6, a first water tank 1 is arranged outside the frame 2 at a height higher than the water line of the upwardly exposed opening chamber. It should be noted that the first water tank 1 has a hydroelectric generator set, which is arranged at the bottom of the first water tank 1. In addition, a water inlet 11 and a drain outlet 12 are arranged along the rotation path of the insert plate 43 to the upwardly exposed opening chamber, wherein the water inlet 11 is located higher than the drain outlet 12, and the water inlet 11 is connected to the first water tank 1, and the drain outlet 12 is connected to the hydroelectric generator set in the first water tank 1.

[0041] In combination with the specific description of embodiment 1, when the inserting plate 43 extends outward relative to the sleeve 41 and extends to the cavity with the upward opening and contacts the water, the inserting plate 43 is used as the provoking part to push the water from the sleeve 41 to the cavity. Figure 5 The water inlet 11 shown is introduced into the first water tank 1, and then during the period of limiting the speed of the main shaft 6, the water used to limit the speed is guided into the first water tank 1, so that when there is a power shortage, the hydroelectric generator set can be used to discharge water to generate electricity, so as to make up for the loss with the electricity generated by the hydroelectric generator set.

[0042] Of course, in this embodiment, wind power generation and hydropower generation can also be combined, that is, after the plug plate 43 stirs the water into the first water tank 1, the hydroelectric generator set drains the water to generate electricity, and the water is introduced into the chamber with an upward opening from the drain port 12. During the whole process, the water is always in a dynamic cycle to meet the requirements of limiting the speed of the main shaft 6 for effective wind power generation, and utilizing the kinetic energy generated in the speed protection of the main shaft 6 for hydropower generation.

[0043] Example 3

[0044] Example 3 is an extended example of Example 2, that is, in this example, a second water tank 9 connected to the first water tank 1 is further configured outside the frame 2, wherein the second water tank 9 has a hydroelectric generator set with the same specifications as the first water tank 1, and the hydroelectric generator set is also located at the bottom of the second water tank 9. It should be noted that the second water tank 9 has a drain, and the drain is located in a cavity with an upward opening, please refer to Figure 3 The second water tank 9 is connected to the first water tank 1 through the dispensing pipe 10, that is, when the water tank is used for energy storage, after the first water tank 1 is full of water, the excess water is guided to the second water tank 9 through the dispensing pipe 10. It should be noted that the dispensing pipe 10 is wrapped around the surface of the generator set 8, that is, during the period when the dispensing pipe 10 guides water from the first water tank 1 into the second water tank 9, the flowing water indirectly contacts the generator set 8 to take away excess heat from the generator set 8 and maintain the efficient operation of the generator set 8.

[0045] Embodiments 1, 2 and 3 all involve an impeller 5 , which includes a second sleeve 51 mounted on one end of a main shaft 6 and a plurality of blades 52 arranged in an annular array around the second sleeve 51 .

[0046] In embodiments 1, 2 and 3, a plurality of supports 7 are arrayed at the generator set 8, with both ends respectively fixed to the frame 2 and the generator set 8.

[0047] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0048] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. An energy storage wind power generation device, characterized in that: The invention comprises a frame, wherein the frame has a chamber with an opening exposed upward, water is injected into the chamber, and a main shaft is arranged with the chamber as the bottom and traversing the frame upward, and an impeller and a generator set are respectively connected to the two ends of the main shaft, and a runner is also arranged between the impeller and the generator set, wherein the runner comprises a first sleeve sleeved on the main shaft and a plurality of sleeves arranged in an annular array around the first sleeve, wherein the plurality of sleeves are located directly above the chamber with an opening exposed upward, and a plug plate is movably sleeved in the sleeve, and is used for making the plug plate extend outward relative to the sleeve and extend to the chamber with an opening exposed upward to contact water when the main shaft exceeds a limit speed; A first water tank is arranged outside the frame, the height of which is higher than the water line of the upwardly exposed opening chamber. The first water tank has a hydroelectric generator set, which is arranged at the bottom of the first water tank. A water inlet and a water outlet are arranged along the rotating path of the plug plate to the chamber that is upwardly exposed opening, wherein the water inlet is located higher than the water outlet, and the water inlet is connected to the first water tank, and the water outlet is connected to the hydroelectric generator set in the first water tank; When the plug plate extends outward relative to the sleeve box and extends to the chamber with an upwardly exposed opening and contacts with water, the plug plate serves as a provoking portion, which guides water from the water inlet into the first water tank, and then during the period of limiting the spindle speed, the water used to limit the speed is guided into the first water tank, so that when there is a shortage of electricity, the hydroelectric generator set can be used to drain water and generate electricity, so as to make up for the loss with the electric energy generated by the hydroelectric generator set.

2. The energy storage wind power generation equipment according to claim 1, characterized in that: At least two partitions are arranged in the frame, and the at least two partitions are fixed on the inner wall of the frame at intervals along the thickness direction of the frame to form the cavity with an opening exposed upward.

3. The energy storage wind power generation equipment according to claim 1, characterized in that: A spring fixed to the bottom of the sleeve box is installed at one end of the insert plate inserted into the sleeve box. The spring pulls the insert plate and makes the insert plate completely retract into the sleeve box when the main shaft rotates at a speed not exceeding a limit.

4. The energy storage wind power generation equipment according to claim 1, characterized in that: A second water tank connected to the first water tank is also arranged outside the frame, wherein the second water tank has a hydroelectric generator set with the same specifications as the first water tank, and the second water tank has drainage, and the drainage is located in a cavity with an opening exposed upward.

5. The energy storage wind power generation equipment according to claim 4, characterized in that: The first water tank is connected to the second water tank through a liquid distribution pipe, and the liquid distribution pipe is wound around the generator set connected to the main shaft.

6. The energy storage wind power generation equipment according to claim 1, characterized in that: The impeller comprises a second sleeve installed at one end of the main shaft and a plurality of blades arranged in an annular array around the second sleeve.

7. An energy storage method for an energy storage wind power generation device according to any one of claims 1 to 6, characterized in that: The steps include: When the main shaft rotates at a speed exceeding a limit, the plug plate is extended outward relative to the sleeve box and extends into the chamber with an upwardly exposed opening to contact with water; The plug board is used as a propelling part to guide water from the water inlet into the first water tank, so that when power is insufficient, the water can be discharged by the hydroelectric generator set, and the electric energy generated by the water discharge of the hydroelectric generator set can be used to supplement the power shortage.

Images