Flywheel with eccentric variable moment of inertia

Abstract

The application discloses an eccentric variable-rotating-inertia flywheel, which comprises a flywheel cabin structure, an eccentric wheel adjusting structure, an eccentric wheel braking structure, an electric rotary joint mechanism, a dynamic balance module and a position detection mechanism, the flywheel cabin structure provides a shell for the flywheel, the eccentric wheel adjusting structure is used for adjusting the position of the eccentric wheel, the eccentric wheel braking structure is used for providing braking force for the eccentric wheel body, the electric rotary joint mechanism is used for realizing automatic and stepless adjustment of the rotating inertia of the flywheel, the dynamic balance module is used for realizing the dynamic balance requirement of the flywheel, and the position detection structure is used for monitoring the positions of the flywheel, the eccentric wheel and the main transmission shaft. The eccentric wheel adjusting mechanism is arranged to adjust the position of the eccentric wheel, a servo motor drives the rotation of an adjusting gear shaft, drives the rotation of the eccentric wheel, makes the eccentric centroid rotate by a certain angle, forms the radial displacement of the eccentric centroid position, realizes the adjustment of the centroid position of the flywheel, and thus the adjustment of the rotating inertia of the flywheel is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wheel-shaped mechanical energy accumulator devices, in particular to an eccentric variable moment of inertia flywheel. BACKGROUND

[0002] A flywheel is a wheel-shaped mechanical energy accumulator installed on a rotating shaft of a machine. When the speed of the machine increases, the kinetic energy of the flywheel increases, storing energy. When the speed of the machine decreases, the kinetic energy of the flywheel decreases, releasing energy. The flywheel can be used to reduce speed fluctuations during the operation of the machine.

[0003] In the prior art, most variable moment of inertia flywheels adjust the moment of inertia by moving internal mass blocks. The structures for moving the mass blocks are arranged inside the flywheel, occupying a large space inside the flywheel, thus compressing the space position of the mass blocks and reducing the mass of the mass blocks, which affects the adjustment amount of the moment of inertia of the flywheel.

[0004] The existing flywheel has the following defects:

[0005] 1. Patent document CN101236133A proposes an automatic fine adjustment variable moment of inertia flywheel system. The flywheel of this patent document uses a conical gear to drive a lead screw, and the lead screw and lead screw nut drive the change of the radius of the circumference surrounded by the four mass blocks to slightly change the moment of inertia of the system, achieving fine adjustment within the measurement range. However, the structures for adjusting the moment of inertia in this patent document are arranged inside the flywheel body, compressing the space of the mass blocks and limiting the adjustment amount of the moment of inertia.

[0006] 2. In the prior art, the position of the structure for adjusting the moment of inertia of the variable moment of inertia flywheel may not be stable during the adjustment of the moment of inertia.

[0007] 3. Patent document CN116677748A discloses a large variable moment of inertia flywheel. However, the flywheel in this patent document does not consider setting a dynamic balancing module to reduce the vibration caused by the flywheel.

[0008] 4. In the prior art, the variable moment of inertia flywheel does not consider setting a position detection mechanism to ensure that the adjustment of the moment of inertia of the flywheel achieves the desired effect. SUMMARY

[0009] The present application aims to provide an eccentric variable moment of inertia flywheel to solve the problems raised in the background art.

[0010] In order to achieve the above object, the application provides the following technical scheme: an eccentric variable moment of inertia flywheel, comprising a flywheel cabin structure, an eccentric wheel adjusting structure, an eccentric wheel braking structure, an electric rotary joint mechanism, a dynamic balance module and a position detection mechanism, the flywheel cabin structure provides a shell for the flywheel, the eccentric wheel adjusting structure is used for adjusting the position of the eccentric wheel, the eccentric wheel braking structure is used for providing braking force for the eccentric wheel body, the electric rotary joint mechanism is used for realizing automatic and stepless adjustment of the moment of inertia of the flywheel, the dynamic balance module is used for realizing the dynamic balance requirement of the flywheel, and the position detection mechanism is used for monitoring the positions of the flywheel, the eccentric wheel and the main transmission shaft.

[0011] The flywheel cabin structure comprises a flywheel body, a flywheel left cover plate, a flywheel right cover plate, a fourth bearing and a first bolt, the center of the flywheel left cover plate and the flywheel right cover plate of the flywheel cabin structure is provided with the fourth bearing, the inner side of the fourth bearing is provided with a main shaft, and the outer surface of the flywheel body is provided with a transmission gear or other transmission structure.

[0012] The eccentric wheel adjusting structure comprises an eccentric wheel body, an adjusting gear shaft, a second bearing, a servo motor and a control device, a first key and a second bolt, the eccentric wheel adjusting mechanism is assembled in the inside of the flywheel cabin mechanism, the initial mass center positions of all the eccentric wheels are located at the positions closest to the flywheel center, the gear modules and the number of teeth of the gears on the eccentric wheels are consistent and are meshed with each other, the flywheel mass center position adjustment is powered by the servo motor of the eccentric wheel adjusting mechanism, and all the mass center positions of the eccentric wheels can be synchronously displaced.

[0013] Preferably, the cover plate position of the flywheel cabin structure is provided with the first bearing, the inner side of the first bearing is provided with the eccentric wheel body, the rotation centers of the eccentric wheel bodies are uniformly arranged on the circumference of the φD coaxial with the flywheel center, the inside of the eccentric wheel adjusting mechanism is provided with the second bearing, the inside of the second bearing is provided with the adjusting gear shaft, the adjusting gear shaft is located on the line connecting the rotation center of the eccentric wheel body and the flywheel center, the gear on the adjusting gear shaft is meshed with the gear on one of the eccentric wheel bodies, the outer wall of the eccentric wheel adjusting mechanism is provided with the servo motor and the control device, the output end of the servo motor and the control device is connected with the adjusting gear shaft, one side of the servo motor and the control device is connected with the eccentric wheel adjusting mechanism through the second bolt, the outer side of the adjusting gear shaft is provided with the first key, and the adjusting gear shaft is connected with the servo motor and the control device through the first key, the shapes, the mass, the mass center eccentricity b of all the eccentric wheel bodies are consistent, and the gear teeth on the outer surface of the eccentric wheel body and the mass center relative position are consistent.

[0014] Preferably, the left side of the flywheel body is installed with the flywheel left cover plate through the first bolt, and the right side of the flywheel body is installed with the flywheel right cover plate through the first bolt.

[0015] Preferably, the eccentric wheel brake mechanism comprises a brake gear shaft, an electromagnetic brake, a third bearing, a second key and a third bolt, the inside of the flywheel cabin body mechanism is provided with the third bearing, the inside of the third bearing is provided with the brake gear shaft, the brake gear shaft is located at the symmetrical position of the adjusting gear shaft, the gear outside the adjusting gear shaft is consistent with the gear teeth number and module of the gear outside the brake gear shaft, the outside of the adjusting gear shaft is provided with the second key, the outer wall of the flywheel cabin body mechanism is provided with the electromagnetic brake, and the electromagnetic brake is connected with the brake gear shaft through the second key.

[0016] Preferably, the electric rotary joint mechanism comprises a first electric rotary joint outer ring, a first electric rotary joint inner ring, motor power lines and control lines, a second electric rotary joint fixing sleeve, a second electric rotary joint outer ring, a second electric rotary joint inner ring, motor and electric brake power lines and control lines, electric rotary joint inner ring connection lines, threading holes, electric brake power lines and control lines, the flywheel body and the main shaft are rotary and out of sync, two groups of electric rotary joints are arranged between the flywheel body and the main shaft, and the two groups of electric rotary joints are respectively the first electric rotary joint and the second electric rotary joint.

[0017] Preferably, the outside of the second electric rotary joint is provided with the second electric rotary joint fixing sleeve, the inside of the second electric rotary joint fixing sleeve is fixedly installed with the second electric rotary joint outer ring, the outer surface of the main shaft is fixedly installed with the second electric rotary joint inner ring, the second electric rotary joint inner ring rotates with the main shaft, and the second electric rotary joint inner ring is located on the inside of the second electric rotary joint outer ring.

[0018] Preferably, the inside of the flywheel right cover plate of the flywheel cabin body mechanism is installed with the first electric rotary joint outer ring, the outer surface of the main shaft is installed with the first electric rotary joint inner ring, and the first electric rotary joint inner ring is located on the left side of the second electric rotary joint inner ring.

[0019] Preferably, the motor power lines and control lines are connected between the servo motor and the control device and the first electric rotary joint outer ring, the motor and electric brake power lines and control lines are connected on one side of the second electric rotary joint outer ring, the threading holes are arranged in the inside of the main shaft, the electric rotary joint inner ring connection lines are connected between the second electric rotary joint inner ring and the first electric rotary joint inner ring, the electric rotary joint inner ring connection lines pass through the threading holes, and the electric brake power lines and control lines are connected between the first electric rotary joint outer ring and the electromagnetic brake.

[0020] Preferably, the dynamic balance module comprises a dynamic balance adjusting block, the inside of the flywheel cabin body mechanism is assembled with the dynamic balance adjusting block, and the dynamic balance adjusting block is installed outside the eccentric wheel motion track.

[0021] Preferably, the position detection mechanism includes a position sensor, an encoder is installed inside the servo motor and control device, the encoder is used to detect the rotational position of the servo motor and the rotational position of the eccentric wheel, and a position sensor is installed on the outer circle of the flywheel body and the outer side of the main shaft. When the flywheel body and the main shaft rotate to a certain set position, the position sensor sends a signal to control the eccentric wheel adjustment mechanism to start.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. This invention adjusts the position of the eccentric wheel by setting an eccentric wheel adjustment mechanism, thereby adjusting the position of the flywheel's center of mass. The servo motor of the eccentric wheel adjustment mechanism provides the power source, drives the adjustment gear shaft to rotate, and drives the gear on the eccentric wheel to rotate, causing the eccentric center of mass to rotate by a certain angle, forming a radial displacement of the eccentric center of mass position, thereby adjusting the position of the flywheel's center of mass and thus adjusting the flywheel's rotational inertia.

[0024] 2. The present invention provides an eccentric wheel braking mechanism with an electromagnetic brake as the braking power source. The brake gear shaft is fixedly connected to the electromagnetic brake, and the brake gear shaft of the eccentric wheel braking mechanism meshes with the gear on the eccentric wheel. The eccentric wheel's rotational inertia, the centrifugal force generated by the flywheel's revolution, or the rotational tendency of the eccentric wheel due to its own gravity are all transmitted to the electromagnetic brake by the brake gear shaft. The braking force generated by the electromagnetic brake can stop the rotation of the eccentric wheel, thereby ensuring the stability of the eccentric wheel's center of mass position.

[0025] 3. This invention meets the dynamic balance requirements of the flywheel by setting a dynamic balance adjustment module. By conducting static and dynamic balance tests on the flywheel and adding dynamic balance adjustment blocks at appropriate positions, the balance requirements of the flywheel during high-speed rotation are achieved, thereby reducing the vibration caused by the flywheel.

[0026] 4. This invention achieves the expected adjustment of the flywheel rotational inertia by setting a position detection mechanism. The position detection mechanism detects the rotational position of the flywheel or spindle through a position sensor and an encoder. When the flywheel or spindle reaches a certain position, the position sensor sends a signal to start the eccentric wheel adjustment mechanism, which drives the eccentric wheel to rotate a certain angle, thereby achieving the expected adjustment of the flywheel rotational inertia associated with the position of the flywheel or spindle. Attached Figure Description

[0027] Figure 1 This is a structural layout diagram of the eccentric wheel of the eccentric variable moment of inertia flywheel of the present invention;

[0028] Figure 2 This is a cross-sectional view of the eccentric variable moment of inertia flywheel of the present invention;

[0029] Figure 3 This is a detailed drawing of the eccentric wheel of the eccentric variable moment of inertia flywheel of the present invention.

[0030] In the diagram: 1. Flywheel body; 2. Eccentric wheel body; 3. First bearing; 4. Right flywheel cover plate; 5. First bolt; 6. Transmission gear or other transmission structure; 7. Adjusting gear shaft; 8. Second bearing; 9. First key; 10. Second bolt; 11. Servo motor and control device; 12. Outer ring of the first electric rotary joint; 13. Inner ring of the first electric rotary joint; 14. Motor power cable and control cable; 15. Fixing sleeve of the second electric rotary joint; 16. Second electric rotary joint... 17. Outer ring of the connector; 18. Inner ring of the second electric rotary connector; 19. Power and control lines of the motor and electric brake; 20. Connecting wire of the inner ring of the electric rotary connector; 21. Wire hole; 22. Power and control lines of the electric brake; 23. Electromagnetic brake; 24. Second key; 25. Third bolt; 26. Third bearing; 27. Brake gear shaft; 28. Left cover plate of the flywheel; 29. ​​Fourth bearing; 30. Main shaft; 31. Dynamic balance adjustment block; 32. Position sensor. Detailed Implementation

[0031] 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.

[0032] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0034] Please see Figure 1 and Figure 2The present invention provides an embodiment of an eccentric variable moment of inertia flywheel, comprising a flywheel housing structure, an eccentric wheel adjustment structure, an eccentric wheel braking structure, an electric rotary joint mechanism, a dynamic balancing module, and a position detection mechanism. The flywheel housing structure provides a shell for the flywheel, the eccentric wheel adjustment structure is used to adjust the position of the eccentric wheel, the eccentric wheel braking structure is used to provide braking force to the eccentric wheel, the electric rotary joint mechanism is used to realize automatic and stepless adjustment of the flywheel's moment of inertia, the dynamic balancing module is used to achieve the dynamic balance requirements of the flywheel, and the position detection structure is used to monitor the positions of the flywheel, the eccentric wheel, and the main drive shaft.

[0035] The flywheel housing structure includes a flywheel body 1, a flywheel left cover plate 27, a flywheel right cover plate 4, a fourth bearing 28, and a first bolt 5. The center of the flywheel left cover plate 27 and the flywheel right cover plate 4 of the flywheel housing structure is provided with a fourth bearing 28. The inner side of the fourth bearing 28 is provided with a main shaft 29. The outer surface of the flywheel body 1 is provided with a transmission gear or other transmission structure 6.

[0036] The eccentric wheel adjustment structure includes an eccentric wheel body 2, an adjusting gear shaft 7, a second bearing 8, a servo motor and control device 11, a first key 9, and a second bolt 10. The eccentric wheel adjustment mechanism is assembled inside the flywheel housing mechanism. The initial center of gravity of all eccentric wheels is located closest to the center of the flywheel. The gears on the eccentric wheels have the same module and number of teeth and mesh with each other. The flywheel center of gravity position adjustment is powered by the servo motor of the eccentric wheel adjustment mechanism, and the center of gravity positions of all eccentric wheels can be moved synchronously.

[0037] The flywheel housing structure has a first bearing 3 located on its cover plate. An eccentric wheel 2 is located inside the first bearing 3, and the rotation center of the eccentric wheel 2 is evenly distributed on the circumference of φD, which is coaxial with the center of the flywheel. A second bearing 8 is located inside the eccentric wheel adjustment mechanism, and an adjustment gear shaft 7 is located inside the second bearing 8. The adjustment gear shaft 7 is located on the line connecting the rotation center of the eccentric wheel 2 and the center of the flywheel. The gear on the adjustment gear shaft 7 meshes with the gear on one of the eccentric wheels 2. A servo motor and control device 11 is located on the outer wall of the eccentric wheel adjustment mechanism, and the output end of the servo motor and control device 11 is connected to the adjustment gear shaft 7. One side of the servo motor and control device 11 is connected to the eccentric wheel adjustment mechanism via a second bolt 10. A first key 9 is located on the outer side of the adjustment gear shaft 7, and the adjustment gear shaft 7 is connected to the servo motor and control device 11 via the first key 9. All eccentric wheels 2 have the same shape, mass, and centroid eccentricity b. The gear teeth on the outer surface of the eccentric wheel 2 are aligned with the centroid.

[0038] Furthermore, during the assembly of the eccentric variable moment of inertia flywheel, the center of mass of each eccentric wheel body 2 must be adjusted to the position of minimum distance from the center of the flywheel. When adjusting the center of mass of the eccentric wheels, the center of mass of all eccentric wheels can be displaced synchronously to ensure the rotational dynamic balance requirements of the flywheel.

[0039] The adjustment of the flywheel's center of mass position is powered by the servo motor and control device 11 of the eccentric wheel adjustment mechanism. The servo motor and control device 11 drive the adjustment gear shaft 7 to rotate. The rotation of the adjustment gear shaft 7 can drive the gear on the eccentric wheel body 2 to rotate under meshing action, thereby causing the eccentric center of mass to rotate at a certain angle and forming a radial displacement of the eccentric center of mass position.

[0040] When the adjusting gear shaft 7 rotates counterclockwise in the direction of F1, all eccentric wheel bodies 2 and brake gear shaft 26 are driven to rotate, and brake gear shaft 26 is driven to rotate clockwise in the direction of F2.

[0041] The flywheel housing mechanism consists of a flywheel body 1 with a flywheel left cover plate 27 and a flywheel right cover plate 4 mounted on it by a first bolt 5, and a fourth bearing 28 set at the center of the cover plate. The rotation of the flywheel is achieved by an external transmission device and a transmission gear or other transmission structure 6 set on the flywheel body 1.

[0042] Please see Figure 2 and Figure 3 An embodiment of the present invention provides: an eccentric variable moment of inertia flywheel, wherein a left flywheel cover plate 27 is installed on the left side of the flywheel body 1 by means of a first bolt 5, and a right flywheel cover plate 4 is installed on the right side of the flywheel body 1 by means of a first bolt 5.

[0043] The eccentric wheel braking mechanism includes a brake gear shaft 26, an electromagnetic brake 22, a third bearing 25, a second key 23, and a third bolt 24. The third bearing 25 is located inside the flywheel housing mechanism, and the brake gear shaft 26 is located inside the third bearing 25. The brake gear shaft 26 is located symmetrically to the adjusting gear shaft 7. The gear on the outside of the adjusting gear shaft 7 has the same number of teeth and module as the gear on the outside of the brake gear shaft 26. The second key 23 is located on the outside of the adjusting gear shaft 7. The electromagnetic brake 22 is located on the outer wall of the flywheel housing mechanism and is connected to the brake gear shaft 26 through the second key 23.

[0044] Furthermore, the braking power source of the eccentric wheel braking mechanism is an electromagnetic brake 22. The brake gear shaft 26 of the eccentric wheel braking mechanism meshes with the gear on the eccentric wheel body 2, causing the brake gear shaft 26 to drive the eccentric wheel body 2 to rotate. The brake gear shaft 26 is fixedly connected to the electromagnetic brake 22. The eccentric wheel's rotational inertia, the centrifugal force generated by the flywheel's revolution, or the rotational tendency of the eccentric wheel due to its own gravity are all transmitted to the electromagnetic brake 22 by the brake gear shaft 26. The braking force generated by the electromagnetic brake 22 can prevent the rotation of the eccentric wheel, avoid the unexpected position change of the eccentric wheel, and thus ensure the stability of the eccentric wheel's center of mass position.

[0045] The sequence of operation of the servo motor and control device 11 and the electromagnetic brake 22 is as follows: when the servo motor and control device 11 starts, the electromagnetic brake 22 releases the brake; when the servo motor and control device 11 stops, the electromagnetic brake 22 is in a braking state, ensuring that the servo motor and control device 11 drives the eccentric wheel to rotate, and accurately adjusts the center of mass of the eccentric wheel to the expected position. The maximum adjustment distance of the eccentricity of the eccentric wheel body 2 is 2b, and stepless adjustment can be achieved within the range of 0-2b.

[0046] Please see Figure 2 An embodiment of the present invention provides: an eccentric variable moment of inertia flywheel, the electric rotary joint mechanism including a first electric rotary joint outer ring 12, a first electric rotary joint inner ring 13, a motor power supply line and control line 14, a second electric rotary joint fixing sleeve 15, a second electric rotary joint outer ring 16, a second electric rotary joint inner ring 17, a motor and electric brake power supply line and control line 18, a connecting line between the inner rings of the electric rotary joint 19, a wire hole 20, and an electric brake power supply line and control line 21. The flywheel body 1 and the main shaft 29 both rotate and there is asynchronous rotation between them. Two sets of electric rotary joints are provided between the flywheel body 1 and the main shaft 29, the two sets of electric rotary joints being the first electric rotary joint and the second electric rotary joint, respectively.

[0047] A second electric rotary joint fixing sleeve 15 is provided on the outer side of the second electric rotary joint. The outer ring 16 of the second electric rotary joint is fixedly installed inside the fixing sleeve 15. The inner ring 17 of the second electric rotary joint is fixedly installed on the outer surface of the main shaft 29, and the inner ring 17 of the second electric rotary joint rotates with the main shaft 29. The inner ring 17 of the second electric rotary joint is located inside the outer ring 16 of the second electric rotary joint.

[0048] The flywheel right cover plate 4 of the flywheel housing mechanism is equipped with a first electric rotary joint outer ring 12, and the outer surface of the main shaft 29 is equipped with a first electric rotary joint inner ring 13, and the first electric rotary joint inner ring 13 is located to the left of the second electric rotary joint inner ring 17.

[0049] A motor power supply line and control line 14 are connected between the servo motor and control device 11 and the outer ring 12 of the first electric rotary joint. A power supply line and control line 18 of the motor and electric brake are connected to one side of the outer ring 16 of the second electric rotary joint. A wire hole 20 is provided inside the spindle 29. A connecting line 19 between the inner rings of the second electric rotary joint and the inner ring 13 of the first electric rotary joint is connected, and the connecting line 19 between the inner rings of the electric rotary joint passes through the wire hole 20. An electric brake power supply line and control line 21 are connected between the outer ring 12 of the first electric rotary joint and the electromagnetic brake 22.

[0050] Furthermore, the connecting wire 19 between the inner rings of the electric rotary joint transmits the power and control signals of the motor and electromagnetic brake 22 to the first electric rotary joint through the wire hole 20. The outer ring 12 of the first electric rotary joint then transmits the power and control signals of the motor and electromagnetic brake 22 to the servo motor and control device 11 and the electromagnetic brake 22 respectively, thereby realizing the adjustment of the eccentric position of the eccentric wheel and realizing the automatic and stepless adjustment of the flywheel's rotational inertia. The flywheel is equipped with an electric rotary joint mechanism, which enables reliable transmission of the power and control signals of the servo motor of the eccentric wheel adjustment mechanism and the electromagnetic brake 22 of the eccentric wheel braking mechanism, as well as the detection signals of the flywheel or main shaft 29 position sensor 31 and the servo motor's built-in encoder, when the flywheel and main shaft 29 are driven to rotate by external transmission power.

[0051] Please see Figure 2 The present invention provides an embodiment of an eccentric variable moment of inertia flywheel, wherein the dynamic balancing module includes a dynamic balancing adjustment block 30, the dynamic balancing adjustment block 30 is assembled inside the flywheel housing mechanism, and the installation positions of the dynamic balancing adjustment block 30 are all outside the motion trajectory of the eccentric wheel 2.

[0052] Furthermore, the dynamic balancing blocks 30 are assembled inside the flywheel housing mechanism. The installation positions of the dynamic balancing blocks 30 are all outside the movement trajectory of the eccentric wheel 2, so they will not hinder the rotation of the eccentric wheel 2. When designing this flywheel, the dynamic balance requirements of the flywheel can be achieved by increasing or decreasing the number and mass of the dynamic balancing blocks 30, and by adjusting the installation position of the dynamic balancing blocks 30. When assembling the dynamic balancing blocks 30, static and dynamic balance tests are performed on the flywheel housing structure. By adding dynamic balancing blocks 30 at appropriate positions, the balance requirements of the flywheel during high-speed rotation are achieved, thereby reducing the vibration caused by the flywheel.

[0053] Please see Figure 2 An embodiment of the present invention provides an eccentric variable moment of inertia flywheel. The position detection mechanism includes a position sensor 31. An encoder is installed inside the servo motor and control device 11. The encoder is used to detect the rotational position of the servo motor and the rotational position of the eccentric wheel. The position sensor 31 is installed on the outer circle of the flywheel body 1 and the outer side of the main shaft 29. When the flywheel body 1 and the main shaft 29 rotate to a certain set position, the position sensor 31 sends a signal to control the eccentric wheel adjustment mechanism to start.

[0054] Furthermore, the servo motor and control device 11 detects the rotational position of the servo motor by setting an encoder, and then detects the rotational position of the eccentric wheel. The position of the flywheel body 1 or the main shaft 29 can be detected by setting a position sensor 31 at the outer circle of the flywheel body 1 or the main shaft 29. When the flywheel body 1 or the main shaft 29 rotates to a certain set position, the position sensor 31 sends a signal to start the eccentric wheel adjustment mechanism. The eccentric wheel adjustment mechanism drives the eccentric wheel body 2 to rotate a certain angle, so as to realize the expected adjustment of the flywheel rotational inertia associated with the position of the flywheel body 1 or the main shaft 29.

[0055] Furthermore, the minimum and maximum values ​​of the eccentric wheel's mass, the eccentricity b, the total mass of the eccentric wheel, and the moment of inertia of the eccentric variable moment of inertia flywheel can be determined through calculation to meet design requirements. Initially, the center of mass on the eccentric wheel is located closest to the center of the flywheel, at which point the flywheel's center of mass radius is at its minimum. According to the flywheel moment of inertia calculation formula:

[0056] J = m * r 2

[0057] In the formula, J is the moment of inertia of the flywheel, in kg·m. 2 m is the mass of the flywheel in kg, and r is the radius of the flywheel's center of mass in m;

[0058] When the radius of the flywheel's center of mass is at its smallest, the flywheel's moment of inertia is also at its minimum; when the radius of the flywheel's center of mass is at its largest, the flywheel's moment of inertia is also at its maximum.

[0059] Furthermore, the mass and eccentricity of all eccentric gear bodies 2 are determined by calculation as needed. In this embodiment, the number of eccentric gear bodies 2 is six. According to geometric principles, the mathematical relationship between the number of teeth, module, and diameter φD of the eccentric gear distribution element is as follows:

[0060] φD=2×Z×m

[0061] In the formula, φD is the diameter of the eccentric wheel distribution element, Z is the number of teeth of the eccentric wheel, and m is the module of the eccentric wheel.

[0062] Similarly, the number of eccentric gear bodies 2 can also be any even number n. The mathematical relationship between the number of teeth, module, and diameter φD of the eccentric gear distribution element is:

[0063] φD=m×Z / sin(180° / n);

[0064] In the formula, φD is the diameter of the eccentric wheel distribution element, Z is the number of teeth of the eccentric wheel, m is the module of the eccentric wheel, and n is the number of eccentric wheels (2) (an even number).

[0065] According to the formula for calculating the kinetic energy of a flywheel:

[0066] In the formula, E is the kinetic energy of the flywheel, J is the moment of inertia of the flywheel, and ω is the angular velocity of the flywheel.

[0067] The angular velocity of a flywheel can be changed according to the formula for calculating the kinetic energy of the flywheel and the principle of energy conservation. For example, increasing the moment of inertia of a rotating flywheel will decrease its angular velocity.

[0068] Working principle: The eccentric variable moment of inertia flywheel is driven to rotate by an external transmission mechanism through the transmission gear or other transmission structure 6 on the flywheel body 1. At this time, the distance from the center of mass of the eccentric wheel body 2 to the center of the flywheel is the smallest.

[0069] When the flywheel body 1 or the main shaft 29 rotates to a certain position, the position sensor 31 of the flywheel or the main shaft 29 sends a signal, the servo motor and control device 11 starts, and at the same time the electromagnetic brake 22 is de-energized and released. The servo motor and control device 11 drives the adjusting gear shaft 7 to rotate, and the adjusting gear shaft 7 drives the eccentric wheel body 2 to rotate. When the center of mass of the eccentric wheel body 2 reaches the expected position, the servo motor and control device 11 sends a signal to control the servo motor and control device 11 to stop rotating. At the same time, the electromagnetic brake 22 is energized and braked to ensure that the center of mass of the eccentric wheel body 2 remains unchanged.

[0070] The flywheel can be cyclically adjusted at a certain frequency through PLC control.

[0071] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An eccentric variable moment of inertia flywheel, comprising a flywheel housing structure, an eccentric wheel adjustment structure, an eccentric wheel braking structure, an electric rotary joint mechanism, a dynamic balancing module, and a position detection mechanism, characterized in that, The flywheel housing structure provides an outer shell for the flywheel; the eccentric wheel adjustment structure is used to adjust the position of the eccentric wheel; the eccentric wheel braking structure is used to provide braking force for the eccentric wheel; the electric rotary joint mechanism is used to realize automatic and stepless adjustment of the flywheel's moment of inertia; the dynamic balancing module is used to realize the dynamic balance requirements of the flywheel; and the position detection mechanism is used to monitor the positions of the flywheel, eccentric wheel, and main drive shaft. The flywheel housing structure includes a flywheel body (1), a left flywheel cover plate (27), a right flywheel cover plate (4), a fourth bearing (28), and a first bolt (5). The left flywheel cover plate (27) and the right flywheel cover plate (4) of the flywheel housing structure are provided with a fourth bearing (28). A main shaft (29) is provided on the inner side of the fourth bearing (28). A transmission gear (6) is provided on the outer surface of the flywheel body (1). The eccentric wheel adjustment structure includes an eccentric wheel body (2), an adjustment gear shaft (7), a second bearing (8), a servo motor and control device (11), a first key (9), and a second bolt (10). The eccentric wheel adjustment structure is assembled inside the flywheel housing structure. The initial center of gravity of all eccentric wheel bodies (2) is located closest to the center of the flywheel. The gears on the eccentric wheel bodies (2) have the same module and number of teeth and mesh with each other. The flywheel center of gravity position adjustment is powered by the servo motor of the eccentric wheel adjustment structure. The center of gravity positions of all eccentric wheel bodies (2) can be synchronously displaced. The flywheel housing structure has a first bearing (3) on its cover plate. An eccentric wheel (2) is located inside the first bearing (3). The rotation center of the eccentric wheel (2) is evenly distributed on the circumference of ɸD, which is coaxial with the center of the flywheel. A second bearing (8) is located inside the eccentric wheel adjustment structure. An adjustment gear shaft (7) is located inside the second bearing (8). The adjustment gear shaft (7) is located on the line connecting the rotation center of the eccentric wheel (2) and the center of the flywheel. The gear on the adjustment gear shaft (7) meshes with the gear on one of the eccentric wheel bodies (2). The outer side of the eccentric wheel adjustment structure... The wall is equipped with a servo motor and control device (11), and the output end of the servo motor and control device (11) is connected to the adjusting gear shaft (7). One side of the servo motor and control device (11) is connected to the eccentric wheel adjustment structure through the second bolt (10). The outer side of the adjusting gear shaft (7) is provided with a first key (9), and the adjusting gear shaft (7) is connected to the servo motor and control device (11) through the first key (9). All eccentric wheel bodies (2) have the same shape, mass, and centroid eccentricity b. The gear teeth on the outer surface of the eccentric wheel body (2) are in the same position relative to the centroid. The eccentric wheel braking structure includes a brake gear shaft (26), an electromagnetic brake (22), a third bearing (25), a second key (23), and a third bolt (24). The flywheel housing structure is provided with a third bearing (25), and the brake gear shaft (26) is provided inside the third bearing (25). The brake gear shaft (26) is located at a symmetrical position to the adjusting gear shaft (7). The gear on the outside of the adjusting gear shaft (7) has the same number of teeth and module as the gear on the outside of the brake gear shaft (26). The adjusting gear shaft (7) is provided with a second key (23) on the outside. The flywheel housing structure is provided with an electromagnetic brake (22), and the electromagnetic brake (22) is connected to the brake gear shaft (26) through the second key (23). The electric rotary joint mechanism includes a first electric rotary joint outer ring (12), a first electric rotary joint inner ring (13), a motor power supply line and control line (14), a second electric rotary joint fixing sleeve (15), a second electric rotary joint outer ring (16), a second electric rotary joint inner ring (17), a motor and electric brake power supply line and control line (18), a connecting line between the inner rings of the electric rotary joint (19), a wire hole (20), and an electric brake power supply line and control line (21). The flywheel body (1) and the main shaft (29) both rotate and there is asynchronous rotation between them. Two sets of electric rotary joints are provided between the flywheel body (1) and the main shaft (29). The two sets of electric rotary joints are the first electric rotary joint and the second electric rotary joint.

2. The eccentric variable moment of inertia flywheel according to claim 1, characterized in that: The left side of the flywheel body (1) is fitted with a left flywheel cover plate (27) by a first bolt (5), and the right side of the flywheel body (1) is fitted with a right flywheel cover plate (4) by a first bolt (5).

3. The eccentric variable moment of inertia flywheel according to claim 1, characterized in that: The second electric rotary joint is provided with a second electric rotary joint fixing sleeve (15) on the outside. The second electric rotary joint outer ring (16) is fixedly installed inside the second electric rotary joint fixing sleeve (15). The second electric rotary joint inner ring (17) is fixedly installed on the outer surface of the main shaft (29). The second electric rotary joint inner ring (17) rotates with the main shaft (29). The second electric rotary joint inner ring (17) is located inside the second electric rotary joint outer ring (16).

4. The eccentric variable moment of inertia flywheel according to claim 3, characterized in that: The flywheel right cover plate (4) of the flywheel housing structure is equipped with a first electric rotary joint outer ring (12), and the outer surface of the main shaft (29) is equipped with a first electric rotary joint inner ring (13), and the first electric rotary joint inner ring (13) is located to the left of the second electric rotary joint inner ring (17).

5. An eccentric flywheel with variable moment of inertia according to claim 4, characterized in that: The servo motor and control device (11) are connected to the outer ring (12) of the first electric rotary joint by a motor power line and a control line (14). The outer ring (16) of the second electric rotary joint is connected to the power line and control line (18) of the motor and the electric brake. The spindle (29) has a wire hole (20) inside. The inner ring (17) of the second electric rotary joint and the inner ring (13) of the first electric rotary joint are connected by a connecting line (19) between the inner rings of the electric rotary joints, and the connecting line (19) between the inner rings of the electric rotary joints passes through the wire hole (20). The outer ring (12) of the first electric rotary joint and the electromagnetic brake (22) are connected by an electric brake power line and a control line (21).

6. The eccentric variable moment of inertia flywheel according to claim 1, characterized in that: The dynamic balancing module includes a dynamic balancing adjustment block (30). The dynamic balancing adjustment block (30) is installed inside the flywheel cabin structure, and the installation position of the dynamic balancing adjustment block (30) is outside the motion trajectory of the eccentric wheel body (2).

7. An eccentric flywheel with variable moment of inertia according to claim 1, characterized in that: The position detection mechanism includes a position sensor (31). An encoder is installed inside the servo motor and control device (11). The encoder is used to detect the rotational position of the servo motor and the rotational position of the eccentric wheel. A position sensor (31) is installed on the outer circle of the flywheel body (1) and the outer side of the main shaft (29). When the flywheel body (1) and the main shaft (29) rotate to a certain set position, the position sensor (31) sends a signal to control the eccentric wheel adjustment structure to start.

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