Inerter flywheel with stiffness cooperatively regulated and controlled

Abstract

The inerter flywheel comprises a wheel disc and a plurality of rotors, and the wheel disc comprises a plurality of guide rails in one-to-one correspondence with the rotors; the guide rails are annularly distributed at equal intervals, and the length direction of each guide rail is parallel to the radial direction; the rotors are connected to the corresponding guide rails in a sliding mode, and an extension spring is connected between every two adjacent rotors. When the rotating speed of the wheel disc changes, all the rotors move in the direction of the corresponding guide rails, meanwhile, the extension springs conduct collaborative deformation with approximately equal deformation, and therefore the dynamic characteristics and rotational inertia of the inerter flywheel are changed through collaborative regulation and control of the rigidity of the extension springs. The device is applied to the field of flywheel type inerter vibration regulation and control, the positions of the rotors are regulated and controlled through cooperative deformation of the multiple extension springs, the dynamic characteristics and rotational inertia of inerter flywheels are changed through cooperative regulation and control of the rigidity of the extension springs, synchronization of the positions of the multiple rotors is effectively achieved, and a good control rule is kept.

Description

Technical Field

[0001] The 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-end dynamic element proposed by Professor MC Smith of Cambridge University in 2001. The force acting on the two ends of the inertia chamber is proportional to the relative acceleration between the two ends, and the unit of this proportional coefficient is kilogram, which is the same as the mass. This coefficient is called the "inertia coefficient". Usually, the inertia chamber uses a flywheel as the basic inertia unit and uses a speed increase transmission mechanism to amplify the inertia of the flywheel to obtain a large inertia coefficient.

[0003] Usually, the moment of inertia of a flywheel is immutable, which means that the inertia coefficient of the inertia container is immutable. Therefore, a mechanical system with an immutable inertia container always has a single-frequency resonance problem. Once the external excitation approaches the natural frequency of the system, the vibration of the mechanical system will increase sharply, which limits the vibration control performance of the inertia container. 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 container.

[0004] The passive control method does not consume energy and has a simple and reliable structure. Using stiffness to control the flywheel inertia coefficient has good reliability and ease of implementation. In the past, there were variable flywheels with multiple compression springs acting on the slider alone, which inevitably had the problem of difficult synchronization of the positions of multiple sliders, causing the flywheel to deviate from the control law during use. Summary of the invention

[0005] In view of the deficiencies in the above-mentioned prior art, the present invention provides an inertial container flywheel with coordinated stiffness regulation, which regulates the position of a mover through the coordinated deformation of multiple tension springs. The dynamic characteristics and moment of inertia of the inertial container flywheel are changed by the coordinated stiffness regulation of the tension springs, thereby effectively achieving multi-motor position synchronization and maintaining a good control law.

[0006] To achieve the above 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; 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 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 changing the dynamic characteristics and rotational inertia of the inertia container flywheel by cooperative regulation of the stiffness of the tension springs.

[0007] 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; There are rounded structures 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 coordination and improving movement smoothness.

[0008] In one embodiment, 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.

[0009] 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; 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.

[0010] In one embodiment, the limiting member is a limiting screw threadedly connected to the second end of the guide rail.

[0011] In one of the embodiments, for the tension spring between two adjacent movers, the extension lines at both ends thereof pass through the centers of the corresponding two movers respectively, so as to ensure the centripetal nature of the spring tension, ensure that the force conditions of each mover are nearly the same during the movement, and ensure the coordinated movement of each mover.

[0012] In one embodiment, the tension spring is connected to the mover via a hole screw and a locking nut; The hole screw comprises 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; The mover is provided with a mounting hole which penetrates the mover vertically, the optical axis section 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 is provided with a spring hole, and the end of the tension spring is connected to the spring hole.

[0013] In one embodiment, the optical axis segment is rotationally matched with the mounting hole.

[0014] 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.

[0015] In one embodiment, 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.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects: 1. The present invention arranges equally spaced guide rails in the annular direction and connects movers on adjacent guide rails through tension springs. The deformation of each tension spring can be kept approximately equal during the sliding process of the mover. The position of the mover is regulated by the coordinated deformation of multiple tension springs. The dynamic characteristics and moment of inertia of the inertia container flywheel are changed by coordinated regulation of the stiffness of the tension springs, so as to effectively achieve the synchronization of the positions of multiple movers and maintain a good control law. 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, and a chamfered structure can be provided on the guide rail, so that 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 has no intersection, thereby avoiding stress concentration; 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 to prevent the mover from sliding off, thereby effectively improving the stability of the inertia container flywheel; 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, so that the guide rail connection, load-bearing and holding can be realized while the inertial container can be conveniently connected and coordinated, which is easy for engineering application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative work.

[0018] Figure 1 An axonometric view of an inertia container flywheel in an embodiment of the present invention; Figure 2 It is a front view of the inertia container flywheel in an embodiment of the present invention; Figure 3 is an axonometric view of a wheel disc in an embodiment of the present invention; Figure 4 An axonometric diagram of a mover in an embodiment of the present invention; Figure 5 It is a front view of a screw with a hole in an embodiment of the present invention.

[0019] 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, perforated screw 40, spring hole 401, limiting section 402, optical axis section 403, threaded section 404, limiting screw 50, locking nut 60.

[0020] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] 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 components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0023] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0024] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, a physical connection, or a wireless communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] 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 the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0026] like Figure 1 , Figure 2 The figure shows an inertia container flywheel with coordinated stiffness control disclosed in the present embodiment (hereinafter referred to as "inertia container flywheel"), which mainly includes a wheel disc 10 and a plurality of movers 20, and the wheel disc 10 includes a plurality of guide rails 102 corresponding to the movers 20. Among them, each guide rail 102 is distributed at equal intervals along the circumferential direction, and the length direction of each guide rail 102 is parallel to the radial direction. The movers 20 are slidably connected to the corresponding guide rails 102, and a tension spring 30 is connected between the two movers 20 on two adjacent guide rails 102. When the inertia container flywheel is assembled to the inertia container and rotates, as the speed of the wheel disc 10 changes, each mover 20 moves synchronously inward or outward along the corresponding guide rail 102. In this process, each tension spring 30 is deformed cooperatively, and the deformation amount of each tension spring 30 remains approximately equal, so that the dynamic characteristics and rotational inertia of the inertia container flywheel are changed by relying on the coordinated stiffness control of the tension spring 30, and the position synchronization of multiple movers 20 is effectively achieved, and a good control law is maintained.

[0027] refer to Figure 3 , Figure 4 The mover 20 has a guide groove 201 that runs through the corresponding guide rail 102 in the length direction. The guide groove 201 cooperates with the corresponding guide rail 102 to form a moving pair, so that the mover 20 can move smoothly along the direction of the corresponding guide rail 102. Preferably, the adjacent groove walls on the guide groove 201 are rounded structures, and the guide rail 102 has a chamfered structure corresponding to the rounded structure. The rounded structure cooperates with the chamfered structure to ensure that the contact surface between the guide groove 201 and the guide rail 102 is discontinuous and non-crossing, thereby avoiding stress concentration, facilitating cooperation and improving movement smoothness.

[0028] It is worth noting that the chamfering structure and the rounded corner structure are only required when the cross-sectional profile of the guide rail 102 and the guide groove 201 is a polygon. In the specific application process, the cross-sectional profile of the guide rail 102 and 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 matching and improving movement smoothness.

[0029] refer to Figure 3The wheel disc 10 also includes a load-bearing connection section 101 of a hollow rotating body structure, and each guide rail 102 is fixedly connected to the outer wall of the load-bearing connection section 101 by welding, threaded connection or snap connection. The outer ring wall of the load-bearing connection section 101 is used to connect, carry and hold the guide rail 102, and the inner ring connection block 104 is used to connect and cooperate with the shaft of the inertia container, and the connection process is convenient and easy for engineering application.

[0030] 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 connection 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 out of the wheel disc 10.

[0031] In the specific implementation process, the second end of the guide rail 102 is provided with a limit threaded hole 103, and the limiter is a limit screw 50 threadedly connected to the limit threaded hole 103. In the specific application process, the limiter can also be connected to the second end of the guide rail 102 by snap fit, latch fixation, etc.

[0032] refer to Figure 1 , Figure 5 , the tension spring 30 is connected to the mover 20 through a hole screw 40 and a locking nut 60. Specifically, the hole screw 40 includes an optical axis section 403, a connecting piece located at a first end of the optical axis section 403, and a threaded section 404 located at a second end of the optical axis section 403. The mover 20 is provided with a mounting step 203, and the mounting step 203 has a mounting hole 202 that vertically penetrates the mover 20. The optical axis section 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.

[0033] As a preferred embodiment, the optical axis section 403 is rotatably matched with the mounting hole 202, so that the screw with hole 40 can rotate relative to the mover 20. Since each mover 20 does not maintain complete synchronization during the sliding process on the corresponding guide rail 102, there will inevitably be a slight gap. By rotating the optical axis section 403 and the mounting hole 202, the tension spring 30 between the two movers 20 can adjust the position adaptively, thereby effectively eliminating the slight position deviation caused by the asynchronous sliding, ensuring the stability and accuracy of the inertial container flywheel operation, while reducing the stress caused by the position error, and improving the service life and performance of the overall inertial container flywheel. In the specific implementation process, there is a limit section 402 between the connecting piece and the optical axis section 403, and the diameter of the limit section 402 is larger than the aperture of the spring hole 401. That is, a step structure is formed between the limit section 402 and the optical axis section 403, so that the rotational cooperation between the optical axis section 403 and the mounting hole 202 is smoother.

[0034] In the specific implementation process, for the tension spring 30 between two adjacent movers 20, the extension lines at both ends thereof 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.

[0035] 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 lightweight materials such as aluminum alloy, while the mover 20 is made of denser materials such as stainless steel, so that the variable moment of inertia provided by the mover 20 accounts for the main part of the flywheel's moment of inertia.

[0036] The assembly process of the inertia container flywheel in this embodiment is as follows: First, the hole screw 40 is threadedly connected and installed at the position of the mounting hole 202 on the mover 20 through the locking nut 60, so that the circumferential direction of the spring hole 401 on the hole screw 40 points to the center of the mover 20; Then, each mover 20 is nested on the guide rail 102 of the wheel disc 10 through the guide groove 201; Afterwards, the limit screw 50 is threadedly connected to the limit threaded hole 103 on the slide rail on which the mover 20 is installed; Then, install the tension spring 30, pass the tension spring 30 through the spring hole 401 on the perforated screw 40, and install it between two adjacent movers 20; 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 .

[0037] 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 changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A stiffness coordinated control inertial container flywheel, 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 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 changing the dynamic characteristics and rotational inertia of the inertia container flywheel by cooperative regulation of the stiffness of the tension springs.

2. The inertia container flywheel with coordinated stiffness control according to claim 1, characterized in that: The mover is provided with 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 are rounded corner structures between adjacent groove walls on the guide groove, and the guide rail has a chamfered structure corresponding to the rounded corner structure to ensure that the contact surface between the guide groove and the guide rail is discontinuous and non-intersecting, avoiding stress concentration, facilitating coordination and improving movement smoothness.

3. The inertia container flywheel with coordinated stiffness control according to claim 1, characterized in that: The wheel disc also includes 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: 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 centripetal nature of the spring tension, ensure that the force conditions of each mover are nearly the same during movement, and ensure the coordination of the movement of each mover.

7. The inertia container flywheel with coordinated stiffness control according to claim 6, characterized in that: The tension spring is connected to the mover via a hole screw and a locking nut; The hole screw comprises 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; The mover is provided with a mounting hole which penetrates the mover vertically, the optical axis section 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 is provided with a spring hole, and the end of the tension spring is connected to the spring hole.

8. The inertia container flywheel with coordinated stiffness control according to claim 7, characterized in that: The optical axis segment is rotationally matched with the mounting hole.

9. The inertia container flywheel with coordinated stiffness control according to claim 7, 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.

10. 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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