Flywheel energy storage device

Abstract

The application discloses a kind of inertial containers that can limit output, including mass block, friction sheet, shell, ball nut, thrust bearing, ball, screw rod, friction sleeve;Through ball nut, thrust bearing, ball, ball screw rod is realized, placed in shell;Mass block and ball nut are provided with friction sheet and friction sleeve;Ball nut and shell are provided with thrust bearing, so that ball nut can only rotate relative to shell;Screw rod is placed in shell axis, only relative to shell to do translation;When screw rod translation, drive ball nut and mass block rotation;When the output of mass block is greater than the friction between friction sheet and friction sleeve, the motion of mass block and ball nut is decoupled.The application starts from the angle of inertial container and vibration isolation principle, and realizes the inertial effect by using ball screw and mass block and other components, sets friction sheet between mass block and ball nut, limits the output of inertial container, and retains the dynamic characteristics of inertial container within a certain range.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of vibration control devices, and more particularly relates to a flywheel mass damper capable of limiting output. BACKGROUND

[0002] In recent years, flywheel mass dampers are commonly used in the field of building structure seismic isolation and mechanical structure vibration control. They are mainly used to increase the apparent mass of the controlled structure and reduce the relative displacement between the structure and the excitation source. At the same time, flywheel mass dampers can also be used with other damping devices to improve the effect of the vibration control system. However, due to the sensitivity of flywheel mass dampers to high-frequency excitation, they are prone to excessive output under high-frequency excitation, especially under random excitation such as earthquakes. This characteristic makes flywheel mass dampers exhibit a sharp increase in control force under high-frequency excitation, which may cause excessive stress on the flywheel mass damper itself or the supporting structure connected thereto, resulting in damage. Therefore, it is necessary to limit the output of the flywheel mass damper to prevent excessive control force under high-frequency excitation and protect the flywheel mass damper and the controlled structure. SUMMARY

[0003] In view of the above defects or improvement needs of the prior art, the present application provides a flywheel mass damper capable of limiting output, which can achieve good flywheel mass effect within the required stroke range and limit the maximum output, thereby protecting the flywheel mass damper and the controlled structure.

[0004] To achieve the above-mentioned purpose, according to one aspect of the present application, a flywheel mass damper capable of limiting output is provided, comprising: a housing and a mass block, a friction plate, a friction sleeve, a lead screw, a ball, a ball nut, and a thrust bearing mounted in the housing.

[0005] The housing and the ball nut are both hollow cylindrical, and the ball nut is connected to the housing through the thrust bearing, so that the ball nut can only rotate relative to the housing.

[0006] The lead screw has threads on the outside, and the ball is embedded between the inside of the ball nut and the threads, forming a ball screw.

[0007] The friction sleeve is fixedly sleeved on the ball nut, and the plurality of mass blocks are combined by a plurality of bolts into a hollow cylinder, nested on the friction sleeve, and each mass block has the friction plate fixedly installed on the inside.

[0008] When the lead screw moves with the external structure, the ball drives the ball nut to rotate, thereby rotating the mass block and generating a flywheel mass effect. When the inertia force of the mass block is greater than the friction force between the friction plate and the friction sleeve, the motion between the ball nut and the mass block is decoupled, thereby limiting the output of the flywheel mass damper.

[0009] Preferably, the bolt is also used to apply a pre-tightening force between the friction plate and the friction sleeve.

[0010] Preferably, one end of the lead screw is fixedly installed with a connecting lug I, and one end of the housing is fixedly installed with a connecting lug II.

[0011] Preferably, the housing is fixedly connected with an external structure through the connecting lug II, and the lead screw is fixedly connected with another external structure through the connecting lug I.

[0012] Preferably, the outer diameter of the mass block is set in a range of 150-500 mm, and the radius of the lead screw is set in a range of 60-150 mm.

[0013] Preferably, the friction plate and the friction sleeve are made of the same material.

[0014] Preferably, the length of the friction sleeve is the same as the length of the ball nut.

[0015] Overall, compared with the prior art, the above technical solutions conceived by the present application can achieve the following beneficial effects:

[0016] The inertial mass damper provided by the present application has the advantages of compact structure, simple construction, and the ability to be used in limited space. When the lead screw moves with the external structure, the ball nut and the mass block are driven to rotate by the balls, thereby realizing the inertial mass effect and achieving good inertial mass characteristics in the required stroke range. In addition, the friction plate and the friction sleeve are arranged between the mass block and the ball nut, and a pre-tightening force is applied between the mass block and the ball nut by the bolt, so that the friction plate and the friction sleeve are in contact, thereby providing a friction force when the ball nut rotates, so that the mass block and the ball nut rotate synchronously. When the inertial force of the mass block is greater than the friction force between the friction plate and the friction sleeve, the motion of the ball nut and the mass block can be decoupled, thereby limiting the output of the inertial mass damper, so as to realize the limitation of the maximum output and protect the inertial mass damper and the controlled structure. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A cross-sectional view of the inertial mass damper provided by the embodiment of the present application is provided.

[0018] Figure 2 An axial projection view of the mass block, the friction plate, and the bolt of the inertial mass damper provided by the embodiment of the present application is provided.

[0019] Figure 3 An axial projection view of the ball nut, the ball, the friction sleeve, and the thrust bearing of the inertial mass damper provided by the embodiment of the present application is provided. DETAILED DESCRIPTION

[0020] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application. In addition, the technical features involved in the various embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0021] The embodiment of the present application provides a kind of inertial container that can limit output, as shown in Figure 1 It includes: shell 1 and the mass block 2, friction plate 3, friction sleeve 9, screw rod 4, ball 5, ball nut 6, thrust bearing 7 installed in the shell 1;

[0022] The shell 1 and ball nut 6 are hollow cylindrical, the ball nut 6 is connected with the shell 1 by the thrust bearing 7, so that the ball nut 6 can only rotate relative to the shell 1;

[0023] The screw rod 4 has a thread on the outside, the ball 5 is embedded between the inside of the ball nut 6 and the thread, to form a ball screw;

[0024] The friction sleeve 9 is fixedly sleeved on the ball nut 6, a plurality of mass blocks 2 are connected and combined by a plurality of bolts 10, and the whole is hollow cylindrical, movably nested on the friction sleeve 9, and the inside of each mass block is fixedly installed with the friction plate 3;

[0025] When the screw rod 4 moves with the external structure, the ball nut 6 is driven to rotate by the ball 5, so that the mass block 2 rotates to generate inertial effect, when the output of the mass block 2 is greater than the friction force between the friction plate 3 and the friction sleeve 9, the motion between the ball nut 6 and the mass block 2 is decoupled, so as to limit the output of the inertial container.

[0026] Preferably, the bolt 10 is also used to apply a pre-tightening force between the friction plate 3 and the friction sleeve 9.

[0027] Preferably, one end of the screw rod 4 is fixedly installed with a connecting lug I 8, and one end of the shell 1 is fixedly installed with a connecting lug II 8`.

[0028] Preferably, the shell 1 is fixedly connected with an external structure through the connecting lug I 8, and the screw rod 4 is fixedly connected with another external structure through the connecting lug II 8`.

[0029] For example, when the inertial container is used for a vibration isolation structure, the two ends of the inertial container are connected with the ground and the vibration isolation layer respectively.

[0030] Specifically, the lead screw 4 has threads, and the housing 1 is a hollow cylinder; the lead screw 4 and the housing 1 are coaxial, that is, the axis of the lead screw coincides with the axis of the housing.

[0031] The ball 5 is embedded between the threads of the ball nut 6 and the screw 4, forming a ball screw.

[0032] The ball nut 6 is connected to the housing 1 via the thrust bearing 7, so that the ball nut 6 can only rotate relative to the housing 1.

[0033] The number of mass blocks 2, N>1, is such that multiple mass blocks are connected by bolts 9, and the assembled whole is a hollow cylinder. When N=2, as follows: Figure 2 As shown, the two mass blocks are connected by several bolts 9. Figures 1-3 As shown, the mass block 2 is a hollow cylinder, and the ball nut 6 is cylindrical in appearance. The mass block 2 is mounted on the outside of the ball nut 6. A friction plate 3 is fixedly installed on the inner side of the mass block 2, and a friction sleeve 9 is fixedly sleeved on the outer side of the ball nut 6. The ball nut 6 is connected to the housing 1 through a thrust bearing 7, so that the ball nut 6 can only rotate relative to the housing 1.

[0034] The housing 1 is fixedly connected to an external structure via connecting lug I 8, and the lead screw 4 is connected to another external structure via connecting lug II 8', so that the lead screw 4 can only translate relative to the housing 1 (i.e., the lead screw itself will not rotate).

[0035] When the lead screw 4 translates with the external structure, it drives the ball nut 6 to rotate via the ball bearings 5. Due to the friction between the friction sleeve and the friction plate, the mass block 2 rotates, thus generating an inertial capacitance effect. When the inertial force of the mass block 2 (i.e., the output force of the mass block 2) is greater than the friction between the friction plate 3 and the friction sleeve 9, the motion of the ball nut 6 and the mass block 2 is decoupled, thereby limiting the output force of the inertial container. It can be understood that the output force of the mass block is the output force of the inertial container.

[0036] For example, under strong earthquakes, the inertial container may experience a surge in output force due to excessive acceleration amplitude at both ends. When the output force of the inertial container exceeds the friction force between the friction plate and the friction sleeve, it will decouple the motion between the ball nut and the mass block (a velocity difference is allowed between the mass block and the ball nut), thereby limiting the output force of the inertial container.

[0037] Preferably, the outer diameter of the mass block 2 is set in the range of 150-500mm, and the radius of the lead screw 4 is set in the range of 60-150mm.

[0038] Preferably, the friction plate 3 and the friction sleeve 9 are made of the same material.

[0039] Preferably, the length of the friction sleeve 9 is the same as the length of the ball nut 6.

[0040] Those skilled in the art will easily understand that the above description is only the preferred embodiment of the present application, and is not intended to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An inertial container with limited output force, characterized in that, include: The housing (1) and the mass block (2), friction plate (3), friction sleeve (9), lead screw (4), ball (5), ball nut (6), and thrust bearing (7) installed inside the housing (1); Both the housing (1) and the ball nut (6) are hollow cylinders. The ball nut (6) is connected to the housing (1) through the thrust bearing (7), so that the ball nut (6) can only rotate relative to the housing (1). The lead screw (4) has threads on the outside, and the ball (5) is embedded between the inner side of the ball nut (6) and the threads to form a ball screw; The friction sleeve (9) is fixedly sleeved on the ball nut (6). Multiple mass blocks (2) are connected by multiple bolts (10) to form a hollow cylinder, which is nested on the friction sleeve (9). The friction plate (3) is fixedly installed on the inner side of each mass block. When the lead screw (4) moves with the external structure, it drives the ball nut (6) to rotate through the ball (5), thereby causing the mass block (2) to rotate and generating an inertial capacity effect. When the inertial force of the mass block (2) is greater than the friction force between the friction plate (3) and the friction sleeve (9), the motion between the ball nut (6) and the mass block (2) is decoupled, thereby limiting the output force of the inertial container. The bolt (10) is also used to apply a preload between the friction plate (3) and the friction sleeve (9).

2. The inertial container as described in claim 1, characterized in that, One end of the lead screw (4) is fixedly installed with a connecting lug I (8), and one end of the housing (1) is fixedly installed with a connecting lug II (8').

3. The inertial container as described in claim 2, characterized in that, The housing (1) is fixedly connected to an external structure via connecting lug I (8), and the lead screw (4) is fixedly connected to another external structure via connecting lug II (8').

4. The inertial container as described in any one of claims 1-3, characterized in that, The outer diameter of the mass block (2) is set in the range of 150-500mm, and the radius of the lead screw (4) is set in the range of 60-150mm.

5. The inertial container as described in any one of claims 1-3, characterized in that, The friction plate (3) is made of the same material as the friction sleeve (9).

6. The inertial container as described in any one of claims 1-3, characterized in that, The length of the friction sleeve (9) is the same as the length of the ball nut (6).

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