Flywheel inertia self-adaptive device for wind storage combined frequency modulation

Abstract

The application discloses a flywheel inertia self-adaptive device for wind storage combined frequency modulation, which comprises a main unit, a protection shell is arranged on the main unit, four supports are fixedly arranged on the side of the protection shell, and a fixing rod is fixedly arranged on the bottom of the protection shell; a working unit is arranged in the main unit, the working unit comprises a working part and a vacuum part arranged on the top of the working part; an adjusting unit is arranged on the side of the main unit, the adjusting unit comprises an adjusting part and a switching part arranged on the front of the adjusting part. The adjusting part and the switching part are cooperatively arranged, so that when the flywheel energy storage is in operation, the electromagnetic bearing system can maintain the stable suspension of the flywheel rotor in the central position during the normal operation of the flywheel, and the mechanical friction loss is greatly reduced. During the inertia adjustment process, the controller actively adjusts the excitation current distribution of the radial electromagnetic bearing and the axial electromagnetic bearing, changes the coupling strength and the spatial distribution of the magnetic field, and produces a continuous and differentiable auxiliary adjustment effect on the equivalent rotational inertia of the flywheel.

Description

Technical Field

[0001] This invention relates to the field of flywheel inertia adaptive technology, specifically to a flywheel inertia adaptive device for wind and energy storage combined frequency regulation. Background Technology

[0002] Inertia is a crucial physical parameter in flywheel energy storage systems, determining the amount of kinetic energy stored in the flywheel and its dynamic response characteristics when interacting with the power grid. A larger inertia allows for the release or absorption of more kinetic energy and stronger primary frequency regulation capabilities, but at the cost of increased flywheel size and weight, and slower response speed. Traditional flywheel energy storage systems are mostly designed with fixed inertia, making it difficult to dynamically adjust the inertia parameter according to the real-time demands of the power grid.

[0003] Chinese patent CN118920509A discloses a method and related device for joint frequency regulation control of a wind-storage system based on overspeed control. The method includes: within a given wind speed range, when the frequency deviation exceeds the frequency regulation dead zone, frequency regulation control is applied to the wind turbine; then, a reference power value for the wind turbine during the frequency regulation period is calculated, and the total frequency regulation energy is calculated based on the wind turbine power during the frequency regulation period, thereby calculating the battery output and supercapacitor output respectively. This invention proposes an adaptive load shedding frequency regulation strategy that does not rely on traditional droop control, avoiding complex parameter tuning. It can dynamically adjust the load shedding coefficient according to the magnitude of the frequency deviation to achieve frequency regulation, while preventing wind turbine rotor stall during frequency regulation, enabling the wind turbine to adaptively participate in frequency regulation.

[0004] Existing technologies also have the following drawbacks: When carrying out wind and energy storage combined frequency regulation, traditional flywheel energy storage systems adopt a design with a fixed mass distribution. Once the manufacturing is completed, the rotational inertia of the flywheel is a constant value. The fixed inertia of the flywheel is insufficient in weak grid scenarios, while in strong grid scenarios, the excessive inertia may lead to response delays. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a flywheel inertia adaptive device for wind and energy storage combined frequency regulation, thus solving the aforementioned problems.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a flywheel inertia adaptive device for wind and energy storage combined frequency regulation, comprising a main unit, which includes a protective shell, four supports are fixedly arranged on the side of the protective shell, and a fixing rod is fixedly arranged on the bottom surface inside the protective shell;

[0007] The working unit located inside the main unit includes a working section and a vacuum section located on its top surface. The working unit is used for controlling the flywheel energy storage operation.

[0008] An adjustment unit located on the side of the main unit includes an adjustment section and a switching section located on its front. The adjustment unit is used for adaptive control of the inertia of the flywheel rotation.

[0009] Preferably, the working part includes a flywheel housing fixedly connected to the bottom surface inside the protective shell, a main motor fixedly connected to the inner wall of the flywheel housing, a connecting shaft rotatably connected to the bottom surface of the main motor, and a flywheel fixedly disposed on the bottom surface of the connecting shaft.

[0010] Preferably, three electromagnetic plates are fixedly installed on the side of the flywheel, a first electromagnetic bearing is fixedly installed on the inner wall of the top of the flywheel housing, a second electromagnetic bearing is fixedly installed on the inner wall of the bottom of the flywheel housing, the surface of the flywheel and the inner wall of the second electromagnetic bearing are rotatably connected, and the surface of the connecting shaft and the inner wall of the first electromagnetic bearing are rotatably connected.

[0011] Preferably, the vacuum section includes a vacuum pump fixedly connected to the top surface of the protective shell, a connecting pipe fixedly connected to the back of the vacuum pump, an absorption pipe fixedly connected to the front of the vacuum pump, an absorption head fixedly connected to the bottom surface of the absorption pipe, and the side of the absorption head fixedly connected to the inner wall of the protective shell.

[0012] Preferably, the adjustment part includes a fixing plate fixedly connected to the back of the protective shell, a working motor is fixedly installed on the back of the fixing plate, the front of the working motor output rod extends through the back of the fixing plate into the interior of the fixing plate and is fixedly connected to a threaded rod, a limit rod is fixedly installed on the inner wall of the fixing plate, and the front of the threaded rod is rotatably connected to the inner wall of the fixing plate.

[0013] Preferably, the threaded rod surface is uniformly threaded with multiple sliders, the inner walls of the multiple sliders are slidably connected to the surface of the limiting rod, the top surfaces of the left and right ends of the multiple sliders are respectively fixed with multiple adjusting magnetic blocks, and the inner walls of the left and right ends of the fixing plate are respectively fixed with two fixing magnetic blocks.

[0014] Preferably, the switching part includes a slide rail fixedly connected to the back of the flywheel housing, a hydraulic cylinder rotatably connected to the surface of the fixed rod, a connecting plate fixedly provided on the end face of the output rod of the hydraulic cylinder, a sliding plate slidably connected to the inner wall of the slide rail, and the surface of the connecting plate and the inner wall of the left end of the sliding plate rotatably connected.

[0015] Preferably, the top surface of the skateboard is uniformly and fixedly provided with multiple grooves, the inner walls of the multiple grooves are rotatably and slidably connected with multiple connecting frames, the top surfaces of the multiple connecting frames are rotatably connected with multiple baffles, and the inner wall of the flywheel housing is uniformly and fixedly provided with multiple connecting rods, the surface of the connecting rods and the inner wall of the baffles are rotatably connected.

[0016] Beneficial effects

[0017] This invention provides a flywheel inertia adaptive device for combined wind and energy storage frequency regulation. Compared with the prior art, it has the following advantages:

[0018] By coordinating the adjustment and switching mechanisms, the electromagnetic bearing system maintains the stable levitation of the flywheel rotor at the center position during normal flywheel operation, significantly reducing mechanical friction losses. During inertia adjustment, the controller actively adjusts the excitation current distribution of the radial and axial electromagnetic bearings, changing the coupling strength and spatial distribution of the magnetic field, thus providing a continuous and differentiable auxiliary adjustment effect on the equivalent rotational inertia of the flywheel. The inertia auxiliary adjustment of the electromagnetic bearings complements the clutch-type adjustment of the "axial dual flywheel group": the clutch mechanism enables a wide range of step-like inertia switching, while the electromagnetic bearings achieve fine and continuous micro-adjustment. Together, they achieve full-range coverage and high precision inertia adjustment. The electromagnetic bearing system also has an active damping control function, which can dynamically adjust the damping force according to the real-time speed and vibration state of the flywheel, improving the dynamic stability and anti-disturbance capability during high-speed rotation.

[0019] Through the linkage structure of the hydraulic cylinder, slide plate, connecting frame and baffle in the switching section, the on and off states between the flywheel housing and the protective housing are quickly and controllably switched. When inertia adjustment is required, the baffle rotates and unfolds so that the side of the flywheel is opposite to the adjustment magnetic block. When no adjustment is required, the baffle closes to maintain the sealing and stability of the flywheel working environment and avoids the continuous interference of the adjustment structure to the normal energy storage of the flywheel.

[0020] The synchronous linear displacement of the multi-stage adjustable magnetic blocks is achieved through the combination structure of the threaded rod, limit rod and multiple sliders driven by the working motor in the adjustment section; by changing the relative position and stacking number between the adjustable magnetic blocks and the fixed magnetic blocks, the magnetic attraction force between them can be steplessly adjusted, thereby providing continuous and variable damping or assistance to the flywheel, and achieving the effect of adaptive adjustment of physical inertia.

[0021] The three electromagnetic plates fixed on the side of the flywheel, along with the adjusting magnetic block and the fixed magnetic block in the adjusting section, form a non-contact magnetic coupling adjustment path. When the electromagnetic plates rotate with the flywheel, they generate controllable magnetic eddy currents or magnetic pulls with the adjusting magnetic block, which realizes dynamic control of the flywheel speed without generating mechanical friction, and significantly improves the response speed and service life of inertia adjustment.

[0022] Through the combined action of the first and second electromagnetic bearings in the working section, along with the adjustment and switching sections, a three-level coordinated control system of "electromagnetic bearing suspension support - magnetic block damping adjustment - flywheel inertia self-adaptation" is achieved. During normal operation, the electromagnetic bearings maintain the flywheel's low-loss rotation, while the adjusting magnetic block provides additional torque during inertia adjustment. The two complement each other, ensuring the long-term energy efficiency of the flywheel and meeting the need for rapid inertia adjustment under grid frequency disturbances.

[0023] The high vacuum level of the flywheel working chamber is maintained through the sealed connection structure of the vacuum pump, absorption tube, absorption head and protective shell in the vacuum section; the vacuum environment greatly reduces the air friction loss and temperature rise when the flywheel rotates at high speed, making the magnetic force adjustment effect applied by the adjustment unit purer and more controllable, and avoiding the adverse effects of airflow disturbance on the inertia adjustment accuracy.

[0024] The synchronous opening and closing of multiple baffles is achieved by using multiple grooves evenly opened on the top surface of the sliding plate in the switching section, the connecting frame and the rotating connection structure of the baffles. This structure only requires one hydraulic cylinder to drive all baffles to move in unison. The action is reliable, occupies little space, and the closed baffles can effectively prevent external dust or magnetic field interference from entering the flywheel working area.

[0025] Multiple adjusting magnetic blocks are fixedly installed on the top surfaces of the left and right ends of the multiple sliders in the adjusting section, and two fixed magnetic blocks are fixedly installed on the inner walls of the left and right ends of the fixing plate, forming a symmetrical double-sided magnetic force adjustment layout. Applying magnetic force on both sides at the same time can make the flywheel symmetrically and evenly stressed, avoiding flywheel swaying or vibration caused by unilateral magnetic attraction, and improving the dynamic stability of the inertia adjustment process at high speed. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of a flywheel inertia adaptive device for wind and energy storage combined frequency regulation proposed in this invention.

[0027] Figure 2 This is a schematic diagram of the adjustment unit structure of a flywheel inertia adaptive device for wind and energy storage combined frequency regulation proposed in this invention;

[0028] Figure 3 This is a schematic diagram of the switching section of a flywheel inertia adaptive device for wind and energy storage combined frequency regulation proposed in this invention.

[0029] Figure 4 This is a schematic diagram of the working unit structure of a flywheel inertia adaptive device for wind and energy storage combined frequency regulation proposed in this invention.

[0030] Figure 5 This invention proposes a flywheel inertia adaptive device for combined wind and energy storage frequency regulation. Figure 2 Enlarged schematic diagram of the structure in area A;

[0031] Figure 6 This invention proposes a flywheel inertia adaptive device for combined wind and energy storage frequency regulation. Figure 3 Enlarged schematic diagram of the structure in area B.

[0032] Figure Descriptions: 100, Main Unit; 101, Protective Shell; 102, Support; 103, Fixing Rod; 200, Working Unit; 201, Working Section; 202, Vacuum Section; 2011, Flywheel Housing; 2012, Main Motor; 2013, Connecting Shaft; 2014, Flywheel; 2015, Electromagnetic Plate; 2016, First Electromagnetic Bearing; 2017, Second Electromagnetic Bearing; 2021, Vacuum Pump; 2022, Absorption Tube; 2023, Absorption Head; 20 24. Connecting pipe; 300. Adjusting unit; 301. Adjusting part; 302. Switching part; 3011. Fixing plate; 3012. Working motor; 3013. Threaded rod; 3014. Limiting rod; 3015. Slider; 3016. Adjusting magnetic block; 3017. Fixing magnetic block; 3021. Slide rail; 3022. Hydraulic cylinder; 3023. Connecting plate; 3024. Slide plate; 3025. Connecting frame; 3026. Connecting rod; 3027. Cover plate. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Example 1

[0035] Reference Figure 1 and Figure 2 , Figure 3 , Figure 5 as well as Figure 6 This is the first embodiment of the present invention. This embodiment provides a flywheel inertia adaptive device for wind and energy storage combined frequency regulation. It can realize that during the inertia adjustment process, the controller actively adjusts the excitation current distribution of the radial electromagnetic bearing and the axial electromagnetic bearing, changes the coupling strength and spatial distribution of the magnetic field, and produces a continuously differentiable auxiliary adjustment effect on the equivalent rotational inertia of the flywheel. The auxiliary adjustment of the inertia of the electromagnetic bearing and the clutch-type adjustment of the "axial double flywheel group" complement each other. It includes a main unit 100, a working unit 200 and an adjustment unit 300.

[0036] The main unit 100 includes a protective shell 101, four supports 102 are fixedly installed on the side of the protective shell 101, and a fixing rod 103 is fixedly installed on the bottom surface inside the protective shell 101.

[0037] The working unit 200, which is located inside the main unit 100, includes a working part 201 and a vacuum part 202 located on its top surface. The working unit 200 is used to control the flywheel energy storage operation.

[0038] An adjustment unit 300 is provided on the side of the main unit 100. It includes an adjustment part 301 and a switching part 302 located on its front. The adjustment unit 300 is used for adaptive control of the inertia of the flywheel rotation.

[0039] In use, the vacuum control operation inside the protective shell 101 is first performed by the vacuum unit 202, and the flywheel energy storage operation is realized by the working unit 201. When inertia adjustment is required, the switching unit 302 is first controlled to connect the electromagnetic system, and the adjustment unit 301 performs electromagnetic adjustment to make the flywheel and the adjustment magnetic block 3016 magnetically attract each other, thereby realizing adaptive inertia adjustment to meet more usage scenarios.

[0040] Example 2

[0041] Reference Figure 1 and Figure 3 as well as Figure 4 This is the second embodiment of the present invention. Unlike the previous embodiment, the working part 201 includes a flywheel housing 2011 fixedly connected to the bottom surface inside the protective shell 101. A main motor 2012 is fixedly connected to the inner wall of the flywheel housing 2011. A connecting shaft 2013 is rotatably connected to the bottom surface of the main motor 2012. A flywheel 2014 is fixedly disposed on the bottom surface of the connecting shaft 2013.

[0042] Specifically, three electromagnetic plates 2015 are fixedly installed on the side of the flywheel 2014, a first electromagnetic bearing 2016 is fixedly installed on the inner wall of the top of the flywheel housing 2011, a second electromagnetic bearing 2017 is fixedly installed on the inner wall of the bottom of the flywheel housing 2011, the surface of the flywheel 2014 and the inner wall of the second electromagnetic bearing 2017 are rotatably connected, and the surface of the connecting shaft 2013 and the inner wall of the first electromagnetic bearing 2016 are rotatably connected.

[0043] In addition, the vacuum unit 202 includes a vacuum pump 2021 fixedly connected to the top surface of the protective shell 101. A connecting pipe 2024 is fixedly connected through the back of the vacuum pump 2021, and an absorption pipe 2022 is fixedly connected through the front of the vacuum pump 2021. An absorption head 2023 is fixedly connected through the bottom surface of the absorption pipe 2022, and the side of the absorption head 2023 is fixedly connected to the inner wall of the protective shell 101.

[0044] In use, when the flywheel's inertia needs to be adaptively adjusted electromagnetically, the hydraulic cylinder 3022 is activated. Through the rotational connection between the hydraulic cylinder 3022 and the fixed rod 103, and the rotational connection between the connecting plate 3023 and the slide plate 3024 connected to the output rod of the hydraulic cylinder 3022, the slide plate 3024 is driven to move left and right along the slide rail 3021. Through the grooves on the surface of the slide plate 3024, it drives the connecting frame 3025 to slide and rotate. The baffle plate 3027, rotatably connected to the connecting frame 3025, rotates and unfolds along the connecting rod 3026, thereby allowing the flywheel housing 201 to... The flywheel 2014 and the protective shell 101 are connected. At this time, two magnets with opposite magnetic properties are distributed on the left and right. With the rotation of the flywheel 2014 and the electromagnetic plate 2015 on the surface of the flywheel 2014, a small amount of auxiliary rotation can be generated. When further adjustment is required, the working motor 3012 is started, which makes the threaded rod 3013 rotate. With the limiting action of the limiting rod 3014, multiple sliders 3015 slide synchronously. The magnetic blocks 3016 are stacked to increase the overall magnetic attraction force, thereby controlling the rotation speed of the flywheel 2014 and quickly adapting to the needs for inertia adjustment.

[0045] The adjustment unit 301 includes a fixing plate 3011 fixedly connected to the back of the protective shell 101. A working motor 3012 is fixedly installed on the back of the fixing plate 3011. The output rod of the working motor 3012 extends through the back of the fixing plate 3011 and into the interior of the fixing plate 3011 and is fixedly connected to a threaded rod 3013. A limit rod 3014 is fixedly installed on the inner wall of the fixing plate 3011. The front of the threaded rod 3013 is rotatably connected to the inner wall of the fixing plate 3011. Multiple sliders 3015 are uniformly threaded on the surface of the threaded rod 3013. The inner walls of the multiple sliders 3015 are slidably connected to the surface of the limit rod 3014. Multiple adjusting magnetic blocks 3016 are fixedly installed on the top surfaces of the left and right ends of the multiple sliders 3015 respectively. Two fixing magnetic blocks 3017 are fixedly installed on the inner walls of the left and right ends of the fixing plate 3011 respectively.

[0046] In addition, the switching unit 302 includes a slide rail 3021 fixedly connected to the back of the flywheel housing 2011, a hydraulic cylinder 3022 rotatably connected to the surface of the fixed rod 103, a connecting plate 3023 fixedly provided on the end face of the output rod of the hydraulic cylinder 3022, a sliding plate 3024 slidably connected to the inner wall of the slide rail 3021, the surface of the connecting plate 3023 and the inner wall of the left end of the sliding plate 3024 rotatably connected, a plurality of slide grooves are evenly fixedly opened on the top surface of the sliding plate 3024, a plurality of connecting frames 3025 are rotatably and slidably connected to the inner walls of the plurality of slide grooves, a plurality of baffles 3027 are rotatably connected to the top surfaces of the plurality of connecting frames 3025, a plurality of connecting rods 3026 are evenly fixedly provided on the inner wall of the flywheel housing 2011, and the surface of the connecting rods 3026 and the inner wall of the baffles 3027 are rotatably connected.

[0047] Before use, connect one end of the connecting pipe 2024 to the external collector, start the vacuum pump 2021, and work with the absorption head 2023 and absorption pipe 2022 to quickly absorb air from the inside of the protective shell 101, thereby creating a vacuum inside the protective shell 101. After the vacuum is complete, start the main motor 2012 so that the flywheel 2014 can rotate at high speed and store energy. Connect the flywheel shell 2011 with an electric wire to realize energy transmission. When the switching unit 302 opens the baffle 3027, the flywheel can be driven to rotate magnetically through the action of the first electromagnetic bearing 2016 and the second electromagnetic bearing 2017, which facilitates subsequent adaptive inertia adjustment.

[0048] It should be noted that the components such as motors and controllers in this solution are all common models on the market, and each component is a device or equipment that exists in the prior art, or a device or equipment that can be implemented by the prior art. Its power supply, specific composition and principle are clear to those skilled in the art. At the same time, the fixed connection method mentioned in this invention can adopt the connection methods that exist in the prior art and are common, such as bolts, welding and bonding, so they will not be described in detail.

Claims

1. A flywheel inertia adaptive device for combined wind and energy storage frequency regulation, characterized in that, include: The main unit (100) includes a protective shell (101), four supports (102) are fixedly installed on the side of the protective shell (101), and a fixing rod (103) is fixedly installed on the bottom surface inside the protective shell (101). A working unit (200) is set inside the main unit (100), which includes a working part (201) and a vacuum part (202) located on its top surface. The working unit (200) is used for controlling the flywheel energy storage operation. An adjustment unit (300) is provided on the side of the main unit (100), which includes an adjustment part (301) and a switching part (302) located on its front side. The adjustment unit (300) is used for adaptive control of the inertia of the flywheel rotation.

2. The flywheel inertia adaptive device for wind and energy storage combined frequency regulation according to claim 1, characterized in that: The working part (201) includes a flywheel housing (2011) fixedly connected to the bottom surface inside the protective shell (101). A main motor (2012) is fixedly connected to the inner wall of the flywheel housing (2011). A connecting shaft (2013) is rotatably connected to the bottom surface of the main motor (2012). A flywheel (2014) is fixedly installed on the bottom surface of the connecting shaft (2013).

3. The flywheel inertia adaptive device for wind and energy storage combined frequency regulation according to claim 2, characterized in that: Three electromagnetic plates (2015) are fixedly installed on the side of the flywheel (2014). A first electromagnetic bearing (2016) is fixedly installed on the inner wall of the top of the flywheel housing (2011). A second electromagnetic bearing (2017) is fixedly installed on the inner wall of the bottom of the flywheel housing (2011). The surface of the flywheel (2014) and the inner wall of the second electromagnetic bearing (2017) are rotatably connected. The surface of the connecting shaft (2013) and the inner wall of the first electromagnetic bearing (2016) are rotatably connected.

4. The flywheel inertia adaptive device for wind and energy storage combined frequency regulation according to claim 1, characterized in that: The vacuum unit (202) includes a vacuum pump (2021) fixedly connected to the top surface of the protective shell (101). A connecting pipe (2024) is fixedly connected to the back of the vacuum pump (2021). An absorption pipe (2022) is fixedly connected to the front of the vacuum pump (2021). An absorption head (2023) is fixedly connected to the bottom surface of the absorption pipe (2022). The side of the absorption head (2023) is fixedly connected to the inner wall of the protective shell (101).

5. The flywheel inertia adaptive device for wind and energy storage combined frequency regulation according to claim 1, characterized in that: The adjustment part (301) includes a fixing plate (3011) fixedly connected to the back of the protective shell (101). A working motor (3012) is fixedly installed on the back of the fixing plate (3011). The output rod of the working motor (3012) extends through the back of the fixing plate (3011) and into the interior of the fixing plate (3011) and is fixedly connected to a threaded rod (3013). A limit rod (3014) is fixedly installed on the inner wall of the fixing plate (3011). The front of the threaded rod (3013) is rotatably connected to the inner wall of the fixing plate (3011).

6. The flywheel inertia adaptive device for wind and energy storage combined frequency regulation according to claim 5, characterized in that: The threaded rod (3013) has a plurality of sliders (3015) uniformly threaded on its surface. The inner walls of the sliders (3015) are slidably connected to the surface of the limiting rod (3014). The top surfaces of the left and right ends of the sliders (3015) are respectively fixed with a plurality of adjusting magnetic blocks (3016). The inner walls of the left and right ends of the fixing plate (3011) are respectively fixed with two fixing magnetic blocks (3017).

7. The flywheel inertia adaptive device for wind and energy storage combined frequency regulation according to claim 1, characterized in that: The switching part (302) includes a slide rail (3021) fixedly connected to the back of the flywheel housing (2011), a hydraulic cylinder (3022) rotatably connected to the surface of the fixing rod (103), a connecting plate (3023) fixedly provided on the end face of the output rod of the hydraulic cylinder (3022), a sliding plate (3024) slidably connected to the inner wall of the slide rail (3021), and the surface of the connecting plate (3023) and the inner wall of the left end of the sliding plate (3024) rotatably connected.

8. The flywheel inertia adaptive device for wind and energy storage combined frequency regulation according to claim 7, characterized in that: The top surface of the slide plate (3024) is uniformly and fixedly provided with multiple sliding grooves. The inner walls of the multiple sliding grooves are respectively rotatably and slidably connected to multiple connecting frames (3025). The top surfaces of the multiple connecting frames (3025) are respectively rotatably connected to multiple baffles (3027). The inner wall of the flywheel housing (2011) is uniformly and fixedly provided with multiple connecting rods (3026). The surface of the connecting rods (3026) is rotatably connected to the inner wall of the baffles (3027).

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