An adaptive pull rod type inerter

Abstract

The application relates to a self-adaptive pull rod type inertial damper, which comprises a sliding groove, a translational lever, a double-end plug type connector, a pull rod and a flywheel; the sliding groove is fixed to an external structure and is used for restricting the movement direction of the translational lever; the translational lever moves along the sliding groove; the double-end plug type connector is sleeved on one end of the translational lever and is inserted with the tail end of the pull rod, so that the translational movement of the translational lever in the sliding groove is converted into the rotation of the pull rod around the axis through the double-end plug type connector; one end of the pull rod is connected to the external structure and can serve as the rotating axis; the flywheel is fixedly connected with the pull rod and rotates coaxially and at the same angular velocity with the pull rod around the flywheel axis, so as to simulate the mechanical behavior of the inertial damper. Compared with the prior art, the application has the advantages of strong mass synergies and can realize self-adaptive adjustment under different working conditions.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of inertial mass damper, in particular to a self-adaptive lever-type inertial mass damper. BACKGROUND

[0002] At present, there are many mechanisms that can simulate the mechanical behavior of inertial mass damper, such as ball screw type inertial mass damper, gear rack type inertial mass damper, tuned liquid type inertial mass damper, space cam type inertial mass damper, etc. Among them, the ball screw type inertial mass damper and the gear rack type inertial mass damper mainly use the conversion mode of translation and rotation to realize the mechanical behavior of inertial mass damper. The mechanical form of the two is complex, the required machining precision is high, the installation form is fixed, and the mass efficiency effect is weak. The provided inertial mass coefficient is constant, and it cannot adapt to large stroke motion control.

[0003] Therefore, it is urgent to design an inertial mass damper with strong mass efficiency and self-adaptive adjustment. SUMMARY

[0004] The purpose of the present application is to overcome the defects of the prior art and provide a self-adaptive lever-type inertial mass damper. The conversion of translation and rotation is realized by means of a double-end plug connector, and the mechanical behavior of inertial mass damper is simulated. The inertial mass coefficient can be changed. With the increase of the rotation stroke of the flywheel, the inertial mass coefficient will rise exponentially, realizing the self-adaptive adjustment of the output under different strokes.

[0005] The purpose of the present application can be realized by the following technical scheme:

[0006] The present application provides a self-adaptive lever-type inertial mass damper, which comprises a sliding groove, a translation lever, a double-end plug connector, a lever and a flywheel.

[0007] The sliding groove is fixed to the external structure and is used to constrain the movement direction of the translation lever. The translation lever moves along the sliding groove. The double-end plug connector is sleeved on one end of the translation lever and is inserted into the other end of the lever, so as to convert the translation of the translation lever in the sliding groove into the rotation of the lever around the axis. One end of the lever is connected to the external structure and can be used as the axis of rotation. The flywheel is fixed to the lever and rotates coaxially and at the same angular velocity with the lever around the axis of the flywheel, so as to simulate the mechanical behavior of inertial mass damper.

[0008] Preferably, the sliding groove is a through sliding groove, and the translation lever is perpendicular to the sliding groove as a whole.

[0009] Preferably, the sliding groove is provided on both sides of the translation lever.

[0010] Preferably, the sliding groove is a groove-type sliding groove provided on both sides, and the two ends of the translation lever are respectively embedded in the groove body of the sliding groove.

[0011] Preferably, the slot of the sliding groove is provided with a roller structure for reducing friction.

[0012] Preferably, the slot of the sliding groove is provided with a buffer pad layer for enhancing stability.

[0013] Preferably, the flywheel and the pull rod are connected by welding and a special-shaped plug.

[0014] Preferably, the radial length of the sliding groove is greater than the diameter of the flywheel; the length of the translational lever satisfies that the connecting piece does not slip in motion; and the length of the pull rod is less than the radius of the flywheel.

[0015] Preferably, the length of the double-end plug connecting piece is less than the length of the pull rod.

[0016] Preferably, the length of the double-end plug connecting piece is less than the length of the pull rod satisfies:

[0017] .

[0018] Compared with the prior art, the present application has the following beneficial effects:

[0019] 1) The self-adaptive pull rod type inertial damper of the present application is driven by a translational lever, realizes the conversion of translation and rotation through a double-end plug connecting piece, and then transmits the rotation to a flywheel through a pull rod to simulate the mechanical behavior of an inertial damper and realize the strong efficiency of mass.

[0020] 2) The self-adaptive pull rod type inertial damper can provide a variable inertial coefficient, which will rise exponentially with the increase of the flywheel rotation stroke, realizing the adaptive adjustment of the output under different strokes.

[0021] 3) The self-adaptive pull rod type inertial damper of the present application also has the characteristics of simple mechanical structure and flexible installation method, which can meet the installation requirements of special space.

[0022] 4) The double-sided setting of the sliding groove can adapt to large stroke conditions and provide high stability and device applicability.

[0023] 5) The translational lever in the present application is perpendicular to the sliding groove, and the length is set to satisfy that the connecting piece does not slip in motion, thereby improving the stability of the device.

[0024] 6) The present application adopts the setting that the radial length of the sliding groove is greater than the diameter of the flywheel, which can ensure that the device has sufficient motion stroke.

[0025] 7) The present application adopts the setting that the length of the pull rod is less than the radius of the flywheel, which can ensure the mass efficiency effect.

[0026] 8) The stability of the device can be improved by setting the ratio of the length of the double-end plug-in connector to the length of the lever. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a schematic diagram of the adaptive plate-lever inertial container plane structure (single-side through type) in Example 1.

[0028] Figure 2 It is a schematic diagram of the connection relationship between the double-end plug-in connector, the lever, and the translation bar.

[0029] Figure 3 It is a schematic diagram of the flywheel structure.

[0030] Figure 4 It is a schematic diagram of the adaptive plate-lever inertial container plane structure (double-side through type) in Example 1.

[0031] Figure 5 It is a schematic diagram of the adaptive plate-lever inertial container plane structure in Example 2.

[0032] The reference signs are as follows: 1 - sliding groove; 2 - translation bar; 3 - double-end plug-in connector; 4 - lever; 5 - flywheel. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should fall within the protection scope of the present application.

[0034] Example 1

[0035] As Figures 1-3 , the present embodiment provides an adaptive lever-type inertial container, which comprises a sliding groove 1, a translation bar 2, a double-end plug-in connector 3, a lever 4, and a flywheel 5.

[0036] The sliding groove 1 is fixed to an external vibration device and is used to constrain the movement direction of the translation bar 2. The translation bar 2 penetrates the sliding groove 1 and is perpendicular to the sliding groove 1 as a whole and can move along the groove body in the sliding groove 1. The double-end plug-in connector 3 is sleeved on the translation bar 2 at one end and is inserted into the end of the lever 4 at the other end, so that the translation of the translation bar 2 in the sliding groove 1 can be converted into the rotation of the lever 4 around the axis by the double-end plug-in connector 3. One end of the lever 4 is connected to an external structure and can serve as the axis of rotation. The flywheel 5 is fixed to the lever 4 and rotates coaxially and at the same angular velocity around the axis of the flywheel 5 with the lever 4, so as to simulate the mechanical behavior of an inertial container.

[0037] The application realizes the conversion of translation and rotation through the double-end plug connector, and then transmits the rotation to the flywheel through the lever to realize the mass strong efficiency.

[0038] As a preferred technical solution, the sliding chute 1 is arranged at both ends of the translation lever 2. Figure 4 As shown.

[0039] As a preferred technical solution, the sliding chute 1 is arranged at both ends of the translation lever 2.

[0040] As a preferred technical solution, the radial length of the sliding chute 1 is greater than the diameter of the flywheel 5, the length of the translation lever 2 satisfies that the connector 3 does not slip in motion, and the length of the lever 4 is less than the radius of the flywheel 5.

[0041] As a preferred technical solution, the length of the double-end plug connector 3 is less than the length of the lever 4, and specifically, the length of the double-end plug connector 3 in the embodiment is less than the length of the lever 4. satisfies:

[0042]

[0043] As a preferred technical solution, the flywheel 5 and the lever 4 are fixedly connected by welding or special-shaped plug.

[0044] Working principle: The translation lever 2 vibrates in the sliding chute 1 under the vibration drive of the connected structure, drives one end of the connector 3 to slide on the translation lever 2 in the direction of the lever body and moves along the chute body direction with the translation lever 2, and the other end drives the lever 4 to rotate around the center axis of the flywheel 5, realizes the conversion of translation and rotation, and then the lever 4 drives the flywheel 5 to rotate coaxially and at the same angular velocity, simulates the mechanical behavior of inerter, realizes the mass strong efficiency.

[0045] In the embodiment, the inerter coefficient of the self-adaptive inerter is derived as follows:

[0046] Assuming that the displacement of the translation lever is , the force in the direction of the translation lever movement is , the radius of the lever is , the linear velocity of the flywheel is , the angular velocity is , the flywheel mass is , the radius is , and the mass of other structures outside the flywheel and friction loss are ignored.

[0047] The moment of inertia of the flywheel is:

[0048] (1) ​

[0049] And the physical relationship between the angular velocity of the lever and the velocity is:

[0050] (2)

[0051] Therefore, the kinetic energy of the flywheel can be represented as:

[0052] (3)

[0053] The work done is:

[0054] (4)

[0055] Let The angle between the direction and the outer direction of the lever is According to the velocity component, the following relationship is obtained:

[0056] (5)

[0057] In the operation of the inertial container, The work done is completely converted into the kinetic energy of the flywheel, and both maintain the same power, so the following relationship is obtained:

[0058] (6)

[0059] By substituting equation (5) into equation (6) and simplifying, we get:

[0060] (7)

[0061] According to the definition of the inertance coefficient, the expression of the inertance coefficient of the inertial container is:

[0062] (8)

[0063] According to the expression of the inertance coefficient, under the condition of not limiting the travel of the translating lever, the inertance coefficient provided by the inertial container is nonlinear, which can realize strong mass enhancement, and the inertance coefficient provided can provide an exponentially rising inertance coefficient with the increase (i.e. Decrease) of the travel of the translating lever, which is beneficial to the control of structural vibration.

[0064] Embodiment 2

[0065] In this embodiment, the sliding chute 1 is a groove type sliding chute with double sides, and the two ends of the translating lever 2 are respectively embedded in the groove body of the sliding chute 1, as shown in detail. Figure 5 The other settings of this embodiment are the same as those of embodiment 1.

[0066] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any skilled person in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements shall be covered within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A self-adapting pull rod type inerter, characterized in that, It comprises a sliding slot (1), a translational lever (2), a double-end plug connector (3), a lever (4) and a flywheel (5). The sliding slot (1) is fixed to the external structure and is used to restrict the movement direction of the translational lever (2); the translational lever (2) moves along the sliding slot (1); the double-end plug connector (3) is sleeved on one end of the translational lever (2) and is inserted at the other end with the end of the lever (4), so as to convert the translational movement of the translational lever (2) in the sliding slot (1) into the rotation of the lever (4) around the axis; one end of the lever (4) is connected to the external structure and can be used as the rotating axis; the flywheel (5) is fixed to the lever (4) and rotates coaxially and at the same angular velocity with the lever (4) around the axis of the flywheel (5), so as to simulate the mechanical behavior of an inerter.

2. The self-adapting rod-type inerter of claim 1, wherein, The sliding slot (1) is a through sliding slot, and the translational lever (2) is perpendicular to the sliding slot (1).

3. The self-adapting rod-type inerter of claim 2, wherein, The sliding slot (1) is arranged on both ends of the translational lever (2).

4. The self-adapting rod-type inerter of claim 1, wherein, The sliding slot (1) is a groove sliding slot arranged on both sides, and the two ends of the translational lever (2) are respectively embedded in the groove body of the sliding slot (1).

5. The self-adapting rod-type inerter of claim 2 or 4, wherein, Roller structures are arranged in the slot of the sliding slot (1) to reduce friction.

6. The self-adapting rod-type inerter of claim 2 or 4, wherein, A buffer pad is arranged in the slot of the sliding slot (1) to enhance stability.

7. The self-adapting rod-type inerter of claim 1, wherein, The flywheel (5) is fixed to the lever (4) in a manner including welding and special-shaped plug.

8. The self-adapting rod-type inerter of claim 1, wherein, The radial length of the sliding slot (1) is greater than the diameter of the flywheel (5); the length of the translational lever (2) satisfies that the connector (3) does not slip off in movement; and the length of the lever (4) is less than the radius of the flywheel (5).

9. The self-adapting rod-type inerter of claim 1, wherein, The length of the double-end plug connector (3) is less than the length of the lever (4).

10. The self-adapting rod-type inerter of claim 9, wherein, the length of the double-ended plug-in connector (3) the length of the lever (4) satisfies: 。

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