Multifunctional hybrid dynamic vibration absorption device

Abstract

The invention relates to a multifunctional hybrid dynamic vibration absorber which comprises a spring mass system, a magnetic adjusting system and a passive dynamic vibration absorber part, and the passive dynamic vibration absorber part is of a cantilever beam structure. A spring mass system and a magnetic force adjusting system are installed on the cantilever beam structure. An adjusting mass block can be additionally arranged on the basic mass block, so that mass adjustment is achieved. The elastic rod is of a cantilever beam structure, the position of the main mass can be adjusted through the adjusting screw, and therefore fine adjustment of rigidity is achieved. According to the invention, an independent magnetic force adjusting system composed of the magnetic circuit mass block, the driving winding and the permanent magnet is provided, after the system is electrified, electromagnetic force can be generated in the vibration direction, and active control can be realized by matching with a sensor and a control system.

Description

Technical Field

[0001] The invention relates to a vibration reduction and noise reduction device, in particular to a multifunctional hybrid dynamic vibration absorber used for suppressing vibration of vibration equipment. Background Art

[0002] Dynamic vibration absorbers, also known as dynamic dampers, are mainly composed of mass, springs, and damping systems. Commonly used dynamic vibration absorbers can be divided into undamped dynamic vibration absorbers and damped dynamic vibration absorbers. For single-frequency line spectra, the use of undamped dynamic vibration absorbers can often bring very obvious results. By installing undamped dynamic vibration absorbers with the same natural frequency as the single-frequency line spectrum, the oscillator of the dynamic vibration absorber resonates, thereby taking away the vibration energy of the main vibration system, achieving the purpose of reducing the main vibration system from transmitting the characteristic vibration line spectrum of the equipment to the outside world. For multi-frequency line spectra, the use of damped dynamic vibration absorbers can bring better excitation effects. Through optimization design calculations, the optimal design parameters of the dynamic vibration absorber can be obtained. Depending on whether there is external power input, dynamic vibration absorbers can be divided into passive dynamic vibration absorbers and active dynamic vibration absorbers. Passive vibration absorbers have no external energy input, simple structure, and easy maintenance, but they have the problem of insufficient robustness. Active vibration absorbers use sensors to detect vibrations and provide energy from the outside, which can well compensate for the inherent lack of robustness of dynamic vibration absorbers. However, traditional active vibration absorbers usually have complex structures. Summary of the invention

[0003] The present invention proposes a multifunctional hybrid dynamic vibration absorber, which aims to solve the shortcomings of traditional passive dynamic vibration absorbers, such as poor robustness (narrow operating frequency range) and complicated adjustment process. It adopts an adjustable passive dynamic vibration absorber structure, combined with magnetic damping and electromagnetic force, to achieve the mixed use of active and passive adjustment, and has a relatively simple structure, good robustness and outstanding vibration absorption effect.

[0004] To achieve the above purpose, the technical solution of the present invention is: a multifunctional hybrid dynamic vibration absorber, including a spring mass system, a magnetic force adjustment system, and a passive dynamic vibration absorber part, wherein the passive dynamic vibration absorber part adopts a cantilever beam structure. The spring mass system and the magnetic force adjustment system are installed on the cantilever beam structure.

[0005] Furthermore, the passive dynamic vibration absorber part is composed of a basic mass block, an adjustment mass block, an elastic rod, and an adjustment screw. The elastic rod penetrates into the middle through hole of the basic mass block to form a spring mass system.

[0006] Furthermore, an adjusting screw is installed in the middle of the basic mass block, one section of the adjusting screw is fixed on the elastic rod, and the position of the basic mass block can be adjusted by rotating the adjusting screw.

[0007] Furthermore, an adjustment mass block is added to the basic mass block to form a combined mass block, thereby achieving mass adjustment.

[0008] Furthermore, the magnetic force regulation system consists of a magnetic circuit mass block, a drive winding, and a permanent magnet. The drive winding is installed on a mounting plate extending from the elastic rod; the permanent magnet is installed on the magnetic circuit mass block, and the magnetic circuit mass block is installed on the base mass block.

[0009] Furthermore, the drive winding is composed of a metal cylinder structure and an external winding.

[0010] The present invention has the following beneficial effects:

[0011] (1) An adjustable mass block can be added to the basic mass block to achieve mass adjustment.

[0012] The elastic rod adopts a cantilever beam structure, and the main mass can be adjusted in position by adjusting the screw to achieve fine adjustment of the stiffness.

[0013] (2) It has an independent magnetic force regulation system consisting of a magnetic circuit mass block, a drive winding and a permanent magnet. When current is passed through the system, it will generate electromagnetic force in the vibration direction, and active control can be achieved by cooperating with sensors and control systems.

[0014] (3) When the dynamic vibration absorber is working, the vibration will cause the mass block to move up and down, and the magnetic adjustment system will generate an electromagnetic damping force in the opposite direction of the movement. The damping force has good linear performance and is not affected by temperature changes. It can meet multiple functional requirements and switch between active vibration absorbers and passive vibration absorbers.

[0015] In summary, the present invention has the characteristics of wide adaptability, fine frequency modulation, and active control function, and can effectively suppress the line spectrum vibration of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the hybrid dynamic vibration absorber of the present invention;

[0017] Figure 2 It is a schematic diagram of the magnetic regulation system;

[0018] In the figure: 1-basic mass block; 2-adjusting mass block; 3-elastic rod; 4-adjusting screw; 5-magnetic circuit mass block; 6-driving winding; 7-permanent magnet; 8-metal cylinder. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] like Figure 1As shown in 2, a multifunctional hybrid dynamic vibration absorber provided by an embodiment of the present invention includes a basic mass block 1, an adjustment mass block 2, an elastic rod 3, an adjustment screw 4, a magnetic circuit mass block 5, a driving winding 6, and a permanent magnet 7.

[0021] A through hole is opened in the middle of the basic mass block 1, and the elastic rod 3 can be inserted into it to form a spring mass system; an adjusting screw 4 is installed in the middle of the basic mass block 1, and a section of the adjusting screw 4 is fixed on the elastic rod 3. The position of the basic mass block 1 can be adjusted by rotating the adjusting screw 4; the driving winding 6 is composed of a metal cylinder 8 structure and an external winding, and is installed on a mounting plate extending from the elastic rod 3; the permanent magnet 7 is installed on the magnetic circuit mass block 5, and the magnetic circuit mass block 5 is installed on the basic mass block 1.

[0022] Among them: the basic mass block 1, the adjustment mass block 2, the elastic rod 3, and the adjustment screw 4 constitute the passive dynamic vibration absorber part, which adopts a cantilever beam structure, and the stiffness and mass both adopt an adjustable structure, which can adapt to various working environments.

[0023] The entire mass block adopts a combination of a basic mass block 1 and an adjustment mass block 2, thereby achieving mass adjustment and meeting mass adjustment requirements.

[0024] An adjusting screw 4 is installed in the middle of the basic mass block 1, which can be used to adjust the position of the mass block 2 on the elastic rod 3, thereby achieving stiffness adjustment.

[0025] Among them: the magnetic force adjustment system composed of the magnetic circuit mass block 5, the driving winding 6, and the permanent magnet 7, such as Figure 2 As shown, the magnetic regulation system can provide linear damping force when the power system is in working state, which can well realize the damping design; when powered on, it can provide stable electromagnetic force in conjunction with sensors and control systems to achieve active control effects.

Claims

1. A multifunctional hybrid dynamic vibration absorber, characterized in that: It includes a spring mass system, a magnetic force adjustment system, and a passive dynamic vibration absorber part. The passive dynamic vibration absorber part adopts a cantilever beam structure. A spring mass system and a magnetic force adjustment system are installed on the cantilever beam structure.

2. The multifunctional hybrid dynamic vibration absorber according to claim 1, characterized in that: The passive dynamic vibration absorber part is composed of a basic mass block, an adjustment mass block, an elastic rod, and an adjustment screw. The elastic rod penetrates into the middle through hole of the basic mass block to form a spring mass system.

3. The multifunctional hybrid dynamic vibration absorber according to claim 2, characterized in that: An adjusting screw is installed in the middle of the basic mass block, one section of the adjusting screw is fixed on the elastic rod, and the position of the basic mass block is adjusted by rotating the adjusting screw.

4. The multifunctional hybrid dynamic vibration absorber according to claim 2, characterized in that: An adjustment mass block is added to the basic mass block to form a combined mass block, thereby achieving mass adjustment.

5. The multifunctional hybrid dynamic vibration absorber according to claim 1, characterized in that: The magnetic force regulation system consists of a magnetic circuit mass block, a driving winding, and a permanent magnet. The driving winding is installed on a mounting plate extending from an elastic rod; the permanent magnet is installed on the magnetic circuit mass block, and the magnetic circuit mass block is installed on a basic mass block.

6. The multifunctional hybrid dynamic vibration absorber according to claim 5, characterized in that: The drive winding consists of a metal cylinder structure and external windings.

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