A stiffness-coordinated inertia container flywheel

Abstract

The present invention discloses an inertial flywheel with coordinated stiffness control, comprising a wheel disc and a plurality of movers, the wheel disc including a plurality of guide rails corresponding to the movers; the guide rails are equidistantly spaced along the circumference, and the length of each guide rail is parallel to the radial direction; the movers are slidably connected to the corresponding guide rails, and a tension spring is connected between two adjacent movers; when the rotational speed of the wheel disc changes, the movers move along the corresponding guide rails, while the tension springs undergo coordinated deformation with approximately equal deformation amounts, thereby changing the dynamic characteristics and rotational inertia of the inertial flywheel by coordinated stiffness control of the tension springs. The present invention is applicable to the field of vibration control of flywheel-type inertial devices, and controls the position of the movers through the coordinated deformation of multiple tension springs. The dynamic characteristics and rotational inertia of the inertial flywheel are changed by coordinated stiffness control of the tension springs, effectively achieving position synchronization of multiple movers and maintaining good control laws.

Description

Technical Field

[0001] The present invention relates to the technical field of vibration control of a flywheel-type inertial container, in particular to an inertial container flywheel with coordinated stiffness control. Background Art

[0002] The inertia chamber is a two-terminal dynamic element proposed by Professor MC Smith of the University of Cambridge in 2001. The force acting on the two ends of the inertia chamber is proportional to the relative acceleration between them, and this proportionality coefficient is expressed in kilograms, the same as mass. This coefficient is called the "inertia coefficient." Inertia chambers typically use a flywheel as the basic inertial unit and employ a speed-increasing transmission mechanism to amplify the flywheel's inertia, thereby achieving a large inertia coefficient.

[0003] Typically, the moment of inertia of a flywheel is fixed, which means the inertia coefficient of the inertia chamber is also fixed. Consequently, mechanical systems with fixed inertia chambers are subject to single-frequency resonance. Once the external excitation approaches the system's natural frequency, the vibration of the mechanical system increases dramatically, limiting the vibration control performance of the inertia chamber. Using a variable flywheel to provide a variable inertia coefficient can effectively avoid single-frequency resonance and improve the vibration control performance of the inertia chamber.

[0004] Passive control consumes no energy and has a simple and reliable structure. Using stiffness to control the flywheel's inertia coefficient offers excellent reliability and ease of implementation. Previously, variable flywheels with multiple compression springs acting independently on sliders inevitably faced the problem of difficulty synchronizing the positions of the multiple sliders, causing the flywheel to deviate from the control law during use. Summary of the Invention

[0005] In response to the above-mentioned deficiencies in the prior art, the present invention provides an inertial flywheel with coordinated stiffness control, which controls the position of the mover through the coordinated deformation of multiple tension springs. The coordinated stiffness control of the tension springs is used to change the dynamic characteristics and rotational inertia of the inertial flywheel, effectively achieving position synchronization of multiple movers and maintaining good control laws.

[0006] To achieve the above-mentioned object, the present invention provides an inertia container flywheel with coordinated stiffness control, comprising a wheel disc and a plurality of movers, wherein the wheel disc comprises a plurality of guide rails corresponding to the movers one by one;

[0007] The guide rails are distributed at equal intervals along the circumferential direction, and the length direction of each guide rail is parallel to the radial direction;

[0008] The movers are slidably connected to the corresponding guide rails, and a tension spring is connected between two adjacent movers;

[0009] When the rotational speed of the wheel disc changes, each mover moves along the direction of the corresponding guide rail, and at the same time, the tension springs undergo cooperative deformation with approximately equal deformation amounts, thereby relying on the coordinated regulation of the stiffness of the tension springs to change the dynamic characteristics and rotational inertia of the inertia container flywheel.

[0010] In one embodiment, the mover has a guide groove for cooperating with the corresponding guide rail to form a moving pair, so that the mover can move smoothly along the direction of the corresponding guide rail;

[0011] There is a rounded structure between adjacent groove walls on the guide groove, and the guide rail has a chamfered structure corresponding to the rounded structure to ensure that the contact surface between the guide groove and the guide rail is discontinuous and non-intersecting, avoiding stress concentration, facilitating cooperation and improving movement smoothness.

[0012] In one embodiment, the wheel disc further comprises a load-bearing connection section of a hollow rotating body structure;

[0013] Each of the guide rails is connected to the outer wall of the load-bearing connecting section.

[0014] In one embodiment, a limiting fillet is provided between the first end of the guide rail and the load-bearing connecting section to limit the minimum position of the center of the mover relative to the center of the wheel disc;

[0015] The second end of the guide rail is detachably connected to a limiting member for limiting the maximum position of the center of the mover relative to the center of the wheel disc.

[0016] In one embodiment, the limiting member is a limiting screw threadedly connected to the second end of the guide rail.

[0017] In one embodiment, for the tension spring between two adjacent movers, the extension lines at both ends pass through the centers of the corresponding two movers respectively, so as to ensure the concentricity of the spring tension, ensure that the force conditions of each mover are almost the same during the movement, and ensure the coordination of the movement of each mover.

[0018] In one embodiment, the tension spring is connected to the mover via a hole screw and a lock nut;

[0019] The hole screw includes an optical axis segment, a connecting piece located at a first end of the optical axis segment, and a threaded segment located at a second end of the optical axis segment;

[0020] The mover is provided with a mounting hole that passes through the mover vertically, the optical axis segment is connected to the mounting hole, the connecting piece is located above the mover, and the threaded segment is located below the mover and connected to the locking nut;

[0021] The connecting piece is provided with a spring hole, and the end of the tension spring is connected to the spring hole.

[0022] In one embodiment, the optical axis segment is rotationally engaged with the mounting hole.

[0023] In one embodiment, a limiting section is provided between the connecting piece and the optical axis section, and a diameter of the limiting section is larger than a diameter of the spring hole.

[0024] In one embodiment, the material density of the mover is greater than the material density of the wheel disc, so that the variable moment of inertia provided by the mover accounts for the main part of the moment of inertia of the flywheel.

[0025] Compared with the prior art, the present invention has the following beneficial technical effects:

[0026] 1. The present invention arranges equally spaced guide rails in a circular direction and connects movers on adjacent guide rails via tension springs. The deformation of each tension spring can be kept approximately equal during the mover's sliding process. The mover's position is regulated through the coordinated deformation of multiple tension springs. The stiffness of the tension springs is used to coordinately control the dynamic characteristics and moment of inertia of the inertia container flywheel, effectively achieving position synchronization of multiple movers and maintaining good control behavior.

[0027] 2. In the preferred embodiment of the present invention, a guide groove can be arranged on the mover, and a rounded structure can be provided on the guide groove. At the same time, a chamfered structure can be provided on the guide rail. The rounded structure and the chamfered structure cooperate to ensure that the contact surface between the guide groove and the guide rail is discontinuous and non-intersecting, thereby avoiding stress concentration.

[0028] 3. In the preferred embodiment of the present invention, limiting fillets and limiting members can be provided at both ends of the guide rail to limit the sliding position of the mover on the guide rail, thereby preventing the mover from sliding, thereby effectively improving the stability of the inertia container flywheel;

[0029] 4. In the preferred embodiment of the present invention, a load-bearing connection section for controlling the rotating structure can be provided on the wheel disc, thereby enabling the guide rail connection, load bearing and retention to be achieved while also being conveniently connected and coordinated with the inertia container, facilitating engineering applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0031] Figure 1 This is an axonometric view of the inertia container flywheel in an embodiment of the present invention;

[0032] Figure 2 This is a front view of the inertia container flywheel in an embodiment of the present invention;

[0033] Figure 3 This is an axonometric view of a wheel disc according to an embodiment of the present invention;

[0034] Figure 4 This is an axonometric diagram of a mover in an embodiment of the present invention;

[0035] Figure 5 This is a front view of a screw with a hole in an embodiment of the present invention.

[0036] Figure numbers: wheel 10, load-bearing connecting section 101, guide rail 102, limiting threaded hole 103, connecting hole 104, limiting fillet 105, mover 20, guide groove 201, mounting hole 202, mounting step 203, tension spring 30, hole screw 40, spring hole 401, limiting section 402, optical axis section 403, threaded section 404, limiting screw 50, locking nut 60.

[0037] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0039] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0040] In addition, the terms "first," "second," and so on, used in this disclosure are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referenced. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this disclosure, "plurality" means at least two, such as two or three, unless otherwise specifically defined.

[0041] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; it can mean mechanical connection, electrical connection, physical connection, or wireless communication connection; it can mean direct connection or indirect connection through an intermediate medium; it can mean internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0043] like Figure 1 、 Figure 2 The present invention illustrates an inertial flywheel with coordinated stiffness control (hereinafter referred to as the "inertial flywheel") disclosed in this embodiment. The inertial flywheel primarily comprises a wheel disc 10 and several movers 20. The wheel disc 10 includes several guide rails 102, each corresponding to one of the movers 20. The guide rails 102 are circumferentially spaced evenly apart, with the length of each guide rail 102 parallel to the radial direction. The movers 20 are slidably connected to their corresponding guide rails 102, with tension springs 30 connected between the two movers 20 on adjacent guide rails 102. When the inertial flywheel is mounted on the inertial flywheel and rotated, the movers 20 move synchronously inward or outward along their corresponding guide rails 102 as the speed of the wheel disc 10 changes. During this process, the tension springs 30 deform in tandem, maintaining approximately equal deformation. This coordinated stiffness control of the tension springs 30 modulates the dynamic characteristics and moment of inertia of the inertial flywheel, effectively achieving positional synchronization among multiple movers 20 and maintaining good control behavior.

[0044] refer to Figure 3 、 Figure 4 The mover 20 has a guide groove 201 that runs through the mover 20 along the length of the corresponding guide rail 102. The guide groove 201 cooperates with the corresponding guide rail 102 to form a moving pair, allowing the mover 20 to move smoothly along the corresponding guide rail 102. Preferably, adjacent groove walls on the guide groove 201 have rounded corners, and the guide rail 102 has a chamfered corner corresponding to the rounded corner. The rounded corners cooperate with the chamfered corners to ensure that the contact surface between the guide groove 201 and the guide rail 102 is discontinuous and non-intersecting, thereby avoiding stress concentration, facilitating cooperation, and improving smooth movement.

[0045] It is worth noting that chamfering and rounding are only necessary when the cross-sectional profile of the guide rail 102 or the guide groove 201 is polygonal. In specific applications, the cross-sectional profile of the guide rail 102 or the guide groove 201 can also be set to a circular or elliptical shape, which can also achieve the effect of avoiding stress concentration, facilitating fit, and improving movement smoothness.

[0046] refer to Figure 3 The wheel disc 10 also includes a load-bearing connecting section 101, a hollow rotating structure. Each guide rail 102 is fixedly connected to the outer wall of the load-bearing connecting section 101 by welding, threading, or snap-fitting. The outer annular wall of the load-bearing connecting section 101 is used to connect, support, and retain the guide rails 102, while the inner connecting block 104 is used to connect to the shaft of the inertia container. The connection process is convenient and easy to use in engineering applications.

[0047] refer to Figure 1 、 Figure 3 A limiting fillet 105 is provided between the first end of the guide rail 102 and the load-bearing connecting section 101 to limit the minimum position of the center of the mover 20 relative to the center of the wheel disc 10. That is, when the mover 20 slides to the minimum position on the guide rail 102, the mover 20 contacts the limiting fillet 105. A limiting member is detachably connected to the second end of the guide rail 102 to limit the maximum position of the center of the mover 20 relative to the center of the wheel disc 10. That is, when the mover 20 slides to the maximum position on the guide rail 102, the mover 20 contacts the limiting member. The limiting fillet 105 and the limiting member jointly limit the travel of the mover 20 along the guide rail 102 and prevent the mover 20 from sliding off the wheel disc 10.

[0048] In a specific implementation, a limiting threaded hole 103 is provided at the second end of the guide rail 102, and the limiting member is a limiting screw 50 threadedly connected to the limiting threaded hole 103. In a specific application, the limiting member can also be connected to the second end of the guide rail 102 by snap-fitting, latching, or the like.

[0049] refer to Figure 1 、 Figure 5 The tension spring 30 is connected to the mover 20 via a perforated screw 40 and a locking nut 60. Specifically, the perforated screw 40 includes an optical axis segment 403, a connecting piece located at the first end of the optical axis segment 403, and a threaded section 404 located at the second end of the optical axis segment 403. The mover 20 is provided with a mounting step 203, which has a mounting hole 202 extending vertically through the step. The optical axis segment 403 is connected to the mounting hole 202. The connecting piece is located above the mover 20, and the threaded section 404 is located below the mover 20 and connected to the locking nut 60. The connecting piece has a spring hole 401, and the end of the tension spring 30 is connected to the spring hole 401.

[0050] As a preferred embodiment, the optical axis segment 403 is rotatably engaged with the mounting hole 202, allowing the perforated screw 40 to rotate relative to the mover 20. Since each mover 20 does not maintain complete synchronization when sliding on the corresponding guide rail 102, slight differences will inevitably occur. By rotatably engaging the optical axis segment 403 with the mounting hole 202, the tension spring 30 between the two movers 20 can adaptively adjust its position, effectively eliminating the slight position deviation caused by asynchronous sliding, ensuring the stability and accuracy of the inertial flywheel operation, while reducing the stress caused by position error, and improving the service life and performance of the entire inertial flywheel.

[0051] In a specific implementation, a limiting section 402 is provided between the connecting piece and the optical axis section 403, and the diameter of the limiting section 402 is larger than the diameter of the spring hole 401. That is, a step structure is formed between the limiting section 402 and the optical axis section 403, making the rotational engagement between the optical axis section 403 and the mounting hole 202 smoother.

[0052] During the specific implementation process, for the tension spring 30 between two adjacent movers 20, the extension lines at both ends pass through the center (i.e., the center of gravity) of the corresponding two movers 20 respectively, so as to ensure the concentricity of the spring tension, ensure that the force conditions of each mover 20 are almost the same during the movement, and ensure the coordination of the movement of each mover 20.

[0053] In this embodiment, the material density of the mover 20 is greater than the material density of the wheel disc 10. For example, the wheel disc 10 is made of a lightweight material such as aluminum alloy, while the mover 20 is made of a material with a higher density such as stainless steel, so that the variable rotational inertia provided by the mover 20 accounts for the main part of the flywheel rotational inertia.

[0054] The assembly process of the inertia container flywheel in this embodiment is as follows:

[0055] First, thread the hole screw 40 through the lock nut 60 and install it at the position of the mounting hole 202 on the mover 20, so that the circumferential direction of the spring hole 401 on the hole screw 40 points to the center of the mover 20;

[0056] Then, each mover 20 is nested on the guide rail 102 of the wheel disc 10 through the guide groove 201;

[0057] Afterwards, the limiting screw 50 is threadedly connected to the limiting threaded hole 103 on the slide rail where the mover 20 is installed;

[0058] Then, install the tension spring 30 by passing it through the spring hole 401 on the perforated screw 40 and installing it between two adjacent movers 20;

[0059] Finally, the inertia container flywheel is connected to other components of the inertia container through the load-bearing connecting section 101 on the wheel disc 10 .

[0060] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A flywheel with coordinated stiffness control, characterized in that: It includes a wheel disc and a plurality of movers, wherein the wheel disc includes a plurality of guide rails corresponding to the movers one by one; The guide rails are distributed at equal intervals along the circumferential direction, and the length direction of each guide rail is parallel to the radial direction; The movers are slidably connected to the corresponding guide rails, and a tension spring is connected between two adjacent movers; When the rotation speed of the wheel disc changes, each of the movers moves along the direction of the corresponding guide rail, and at the same time, the tension springs undergo cooperative deformation with approximately equal deformation amounts, thereby changing the dynamic characteristics and rotational inertia of the inertia container flywheel by relying on the coordinated regulation of the stiffness of the tension springs; For the tension spring between two adjacent movers, the extension lines of its two ends pass through the centers of the corresponding two movers, thereby ensuring the concentricity of the spring tension, ensuring that the force conditions of each mover are close to the same during movement, and ensuring the coordination of the movement of each mover; The tension spring is connected to the mover through a hole screw and a locking nut; the hole screw includes an optical axis segment, a connecting piece located at the first end of the optical axis segment, and a threaded section located at the second end of the optical axis segment; the mover is provided with a mounting hole that passes through itself vertically, the optical axis segment is connected in the mounting hole, the connecting piece is located above the mover, and the threaded section is located below the mover and connected to the locking nut; the connecting piece has a spring hole, and the end of the tension spring is connected to the spring hole.

2. The inertia container flywheel with coordinated stiffness control according to claim 1, characterized in that: The mover has a guide groove for cooperating with the corresponding guide rail to form a moving pair, so that the mover can move smoothly along the direction of the corresponding guide rail; There is a rounded structure between adjacent groove walls on the guide groove, and the guide rail has a chamfered structure corresponding to the rounded structure to ensure that the contact surface between the guide groove and the guide rail is discontinuous and non-intersecting, avoiding stress concentration, facilitating cooperation and improving movement smoothness.

3. The inertia container flywheel with coordinated stiffness control according to claim 1, characterized in that: The wheel disc further comprises a load-bearing connection section of a hollow rotating body structure; Each of the guide rails is connected to the outer wall of the load-bearing connecting section.

4. The inertia container flywheel with coordinated stiffness control according to claim 3, characterized in that: A limiting fillet is provided between the first end of the guide rail and the load-bearing connecting section to limit the minimum position of the center of the mover relative to the center of the wheel disc; The second end of the guide rail is detachably connected to a limiting member for limiting the maximum position of the center of the mover relative to the center of the wheel disc.

5. The inertia container flywheel with coordinated stiffness control according to claim 4, characterized in that: The limiting member is a limiting screw threadedly connected to the second end of the guide rail.

6. The inertia container flywheel with coordinated stiffness control according to any one of claims 1 to 5, characterized in that: The optical axis segment is rotationally matched with the mounting hole.

7. The inertia container flywheel with coordinated stiffness control according to any one of claims 1 to 5, characterized in that: A limiting section is provided between the connecting piece and the optical axis section, and a diameter of the limiting section is larger than an aperture of the spring hole.

8. The inertia container flywheel with coordinated stiffness control according to any one of claims 1 to 5, characterized in that: The material density of the mover is greater than the material density of the wheel disc, so that the variable rotational inertia provided by the mover accounts for the main part of the rotational inertia of the flywheel.

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