Pendulum type self-adaptive inerter support and inerter coefficient adjusting method

Abstract

The invention relates to a swing type self-adaptive inerter support and an inerter coefficient adjusting method.The swing type self-adaptive inerter support comprises a small flywheel, a large flywheel, a supporting support, a supporting top plate, a rod piece and a supporting rod, the small flywheel and the large flywheel are fixedly connected through the rod piece, the upper surface of the supporting support is a downwards-concave cambered surface, the curvature radius of the cambered surface is larger than the radius of the small flywheel, and the supporting top plate is fixedly connected with the supporting rod. The lower edge of the small flywheel is tangent to the upper surface of the supporting base, the rod piece is connected with the supporting rod, and the supporting rod is connected with the supporting top plate. Compared with the prior art, the inerter provided by the invention can provide a nonlinear inerter coefficient, and has the advantages of self-adaption and self-resetting characteristics, simple mechanical form, easiness in implementation and the like.

Description

Technical Field

[0001] The present invention relates to the field of high-end equipment manufacturing, and in particular to a pendulum-type adaptive inertia capacity support and an inertia capacity coefficient adjustment method. Background Art

[0002] At present, there are many mechanisms that can simulate the mechanical behavior of the inertia capacity, such as ball screw type inertia capacity, gear rack type inertia capacity, tuned liquid type inertia capacity, etc. Among them, the gear rack type inertia capacity device relies on the connection drive between the rack and the gear to realize the encapsulation of the flywheel inertia. The device structure is relatively complex and requires high processing accuracy.

[0003] Application CN117211436A discloses a dual-flywheel resettable inertial damper, which is realized by a ball screw transmission system, a dual-flywheel unidirectional rotation system and an eddy current damping system. The device has a complex structure and lacks the ability to adaptively adjust the damping coefficient. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and to provide a pendulum-type adaptive inertia bearing and an inertia coefficient adjustment method which is simple in structure, easy to implement and has self-resetting characteristics under large displacement conditions.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] According to one aspect of the present invention, there is provided a pendulum-type adaptive inertial bearing, comprising a small flywheel, a large flywheel, a supporting bearing, a supporting top plate, a rod and a supporting rod, the small flywheel and the large flywheel are fixedly connected by the rod, the upper surface of the supporting bearing is a concave arc surface, the curvature radius of the arc surface is larger than the radius of the small flywheel, the lower edge of the small flywheel is tangent to the upper surface of the supporting bearing, the rod is connected to the supporting rod, the supporting rod is connected to the supporting top plate, and the rod is freely rotated relative to the supporting rod along the axial direction of the rod.

[0007] Furthermore, one end of the rod is fixedly connected to the large flywheel, and the other end is movably connected to the support rod.

[0008] Furthermore, the fixed connection between the small flywheel and the rod is located between the large flywheel and the support rod.

[0009] Further, the radius of the small flywheel is smaller than the radius of the large flywheel.

[0010] Furthermore, the support top plate is located at the uppermost end of the pendulum-type adaptive inertia bearing, one end of the support rod is movably connected to the rod member, and the other end is fixedly connected to the support top plate.

[0011] Furthermore, the support top plate and the support support are respectively connected to the connection points that require inertia, and relative displacement occurs between the support top plate and the support support.

[0012] Furthermore, the small flywheel rolls on the upper surface of the support bracket.

[0013] Furthermore, the radius of curvature of the upper surface of the support base is selected according to the inertia requirement.

[0014] According to another aspect of the present invention, a method for adjusting the inertia coefficient of a pendulum-type adaptive inertia bearing is provided, comprising the following steps:

[0015] Obtain the inertia coefficient requirement of the application scenario, design the curvature radius of the upper surface of the support bearing, and calculate the inertia coefficient of the pendulum-type adaptive inertia bearing until the inertia coefficient requirement is met.

[0016] Furthermore, the calculation method of the inertia coefficient of the pendulum-type adaptive inertia bearing is:

[0017]

[0018] Among them, m in is the inertia coefficient, r1 is the radius of the small flywheel, m1 is the mass of the small flywheel, r2 is the radius of the large flywheel, m2 is the mass of the large flywheel, u1 is the horizontal displacement of the support, R is the radius of curvature of the upper surface of the support, u2 is the horizontal displacement of the support rod and the top plate, F in is the horizontal inertial force.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] 1. The pendulum-type adaptive inertia bearing proposed in the present invention includes a small flywheel, a rod, a large flywheel, a support bearing, a support top plate and a support rod, wherein the small flywheel, the rod and the large flywheel are sequentially connected to form a flywheel system; the small flywheel is connected to the top plate of the seismic isolation layer through the support rod and is placed on a support base with an arc, and a relative acceleration is generated between the support base and the top plate under the drive of external forces, driving the small flywheel to rotate, and driving the entire flywheel system to rotate, so as to simulate the mechanical behavior of the inertia and achieve mass efficiency. Compared with the prior art, the inertia container involved in the present invention can provide a nonlinear inertia coefficient, thereby generating self-adaptation under large displacement conditions, and can adapt to and match a variety of working scenarios, especially seismic isolation structures.

[0021] 2. The inertial container provided by the present invention is connected to the arc-shaped base and has a self-resetting characteristic.

[0022] 3. The inertia coefficient adjustment method proposed in the present invention can realize the inertia coefficient adjustment of the pendulum-type adaptive inertia coefficient support by designing the mass and radius of the large flywheel and the small flywheel after clarifying the inertia coefficient requirements in the usage scenario, so as to meet the inertia coefficient requirements in different usage scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of a pendulum-type adaptive inertia bearing;

[0024] Figure 2 It is a structural schematic diagram of the pendulum-type adaptive inertia bearing from another perspective;

[0025] In the figure, 1. small flywheel, 2. large flywheel, 3. support bearing, 4. support top plate, 5. rod, 6. support rod. DETAILED DESCRIPTION

[0026] 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 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 should fall within the scope of protection of the present invention.

[0027] like Figure 1 and Figure 2 As shown, the present invention relates to a pendulum-type adaptive inertia bearing, comprising a small flywheel 1, a large flywheel 2, a support bearing 3, a support top plate 4, a rod 5 and a support rod 6. The bearing is fixedly connected to two ends of a structure requiring inertia through the support bearing 3 and the support top plate 4, respectively, and a relative displacement is generated between the support bearing 3 and the support top plate 4.

[0028] In this embodiment, the small flywheel 1 and the large flywheel 2 are connected by a rod 5 passing through the center of the two circles. The small flywheel 1, the large flywheel 2 and the rod 5 are fixedly connected, and the small flywheel 1, the large flywheel 2 and the rod 5 can rotate coaxially.

[0029] In this embodiment, one end of the rod 5 is fixedly connected to the large flywheel 2, and the other end is connected to the support rod 6. The connection is a revolute pair, and the fixedly connected small flywheel 1, large flywheel 2 and rod 5 can freely rotate axially relative to the support rod 6. The support rod 6 is used to connect the support top plate 4. In this embodiment, the support top plate 4 is a rectangular plate located at the top of the pendulum-type adaptive inertia bearing, and the support top plate 4 and the support rod 6 are fixedly connected.

[0030] In this embodiment, the support seat 3 is located at the bottom of the pendulum-type adaptive inertia bearing. In this embodiment, the bottom surface of the support seat 3 is a plane, which is used to connect and fix with the structure that needs inertia. In particular, the upper surface of the support seat 3 is a concave arc surface with a clear curvature, and the arc surface is tangent to the lower edge surface of the small flywheel 1. In addition, the radius of curvature of the arc surface is greater than the radius of the small flywheel 1, so that the small flywheel 1 can roll along the upper surface of the support seat 3. As a preferred embodiment, the curvature of the support seat 3 can take any value, and the preferred curvature is a fixed value. In addition, during the rolling process of the small flywheel 1 along the upper surface of the support seat 3, the automatic reset adjustment of the relative position between the support seat 3 and the support top plate 4 of the pendulum-type adaptive inertia bearing can be achieved.

[0031] When the pendulum-type adaptive inertia bearing is working, the support bearing 3 moves horizontally under the drive of the outside world, has horizontal acceleration, and drives the small flywheel 1 to rotate, the small flywheel axis and the bearing move horizontally relative to each other, and drives the upper structure to move horizontally through the support rod 6, generating horizontal acceleration; at the same time, the large flywheel 2 is driven to rotate through the rod 5, and the angular velocity and angular acceleration are the same as those of the small flywheel 1. Compared with the prior art, the present invention can achieve strong quality efficiency, and has a simple mechanical form, flexible installation, and is easy to implement.

[0032] The pendulum-type adaptive inertia support proposed in the present invention drives the flywheel to rotate in the form of rod-shaft transmission, thereby realizing the encapsulation of the flywheel inertia. The output of the inertia container is proportional to the relative acceleration of the two end points, and the ratio is the inertia coefficient. The inertia coefficient of the inertia container is derived as follows:

[0033] Assume that the radius of small flywheel 1 is r1 and the mass is m1, the radius of large flywheel 2 is r2 and the mass is m2, the angular velocity of small flywheel 1 and large flywheel 2 is ω, and the angular acceleration is The moment of inertia of the flywheel system is J, the horizontal displacement of the support 3 is u1, the fixed curvature of the upper surface of the support 3 is R, the horizontal displacement of the support rod 6 and the top plate 4 is u2, and the horizontal inertia force is F in , the mass influence of the connecting rods is not considered, and the energy loss caused by the friction of the device is ignored.

[0034] The angular velocity of the small flywheel 1 and the large flywheel 2 is ω, which can be expressed as:

[0035]

[0036] The angular acceleration of small flywheel 1 and large flywheel 2 is It can be expressed as:

[0037]

[0038] The moment of inertia of the flywheel system is J:

[0039]

[0040] The gravitational potential energy of the flywheel system increases by E p for:

[0041]

[0042] According to the input power equal to the output power, the inertial device satisfies the following equation:

[0043]

[0044] According to formulas (1), (2), (3), and (4), the horizontal force F in It can be expressed as:

[0045]

[0046] According to the definition of inertia coefficient, the inertia coefficient expression of the inertia container is:

[0047]

[0048] For the method for adjusting the inertia coefficient of the pendulum type adaptive inertia bearing of the present embodiment, after clarifying the inertia coefficient requirements in the usage scenario, the inertia coefficient of the pendulum type adaptive inertia bearing can be adjusted by designing the mass and radius of the large flywheel 2 and the small flywheel 1 to meet the inertia coefficient requirements in different usage scenarios.

[0049] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A pendulum-type adaptive inertia bearing, characterized in that: The invention comprises a small flywheel (1), a large flywheel (2), a support seat (3), a support top plate (4), a rod (5) and a support rod (6); the small flywheel (1) and the large flywheel (2) are fixedly connected via the rod (5); the upper surface of the support seat (3) is a concave arc surface, the radius of curvature of the arc surface is greater than the radius of the small flywheel (1); the lower edge of the small flywheel (1) is tangent to the upper surface of the support seat (3); the rod (5) and the support rod (6) are connected; the support rod (6) is connected to the support top plate (4); and the rod (5) is freely rotatable relative to the support rod (6) along the axial direction of the rod (5).

2. The pendulum-type adaptive inertia bearing according to claim 1, characterized in that: One end of the rod (5) is fixedly connected to the large flywheel (2), and the other end is movably connected to the support rod (6).

3. The pendulum-type adaptive inertia bearing according to claim 2, characterized in that: The fixed connection between the small flywheel (1) and the rod (5) is located between the large flywheel (2) and the support rod (6).

4. The pendulum-type adaptive inertia bearing according to claim 1, characterized in that: The radius of the small flywheel (1) is smaller than the radius of the large flywheel (2).

5. The pendulum-type adaptive inertia bearing according to claim 1, characterized in that: The support top plate (4) is located at the uppermost end of the pendulum-type adaptive inertial bearing, and one end of the support rod (6) is movably connected to the rod member (5), and the other end is fixedly connected to the support top plate (4).

6. The pendulum-type adaptive inertia bearing according to claim 1, characterized in that: The support top plate (4) and the support support (3) are respectively connected to the connection points that require inertia, and relative displacement occurs between the support top plate (4) and the support support (3).

7. The pendulum-type adaptive inertia bearing according to claim 6, characterized in that: The small flywheel (1) rolls on the upper surface of the support seat (3).

8. The pendulum-type adaptive inertia bearing according to claim 1, characterized in that: The mass and radius of the large flywheel (2) and the small flywheel (1) are selected according to the inertia requirement.

9. A method for adjusting the inertia coefficient of a pendulum-type adaptive inertia bearing according to any one of claims 1 to 7, characterized in that: The following steps are involved: The inertia coefficient requirement of the application scenario is obtained, the mass and radius of the large flywheel (2) and the small flywheel (1) are designed, and the inertia coefficient of the pendulum-type adaptive inertia bearing is calculated until the inertia coefficient requirement is met.

10. The method according to claim 9, characterized in that The calculation method of the inertia coefficient of the pendulum-type adaptive inertia bearing is: Among them, m in is the inertia coefficient, r1 is the radius of the small flywheel, m1 is the mass of the small flywheel, r2 is the radius of the large flywheel, m2 is the mass of the large flywheel, u1 is the horizontal displacement of the support, R is the radius of curvature of the upper surface of the support, u2 is the horizontal displacement of the support rod and the top plate, F in is the horizontal inertial force.

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