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Zero-frequency vibration reduction device and manufacturing method

A vibration damping device and zero-frequency technology, applied in the direction of mechanical vibration attenuation devices, etc., can solve the problems of large additional mass, small vibration-absorbing frequency range, complex structure of vibration-damping devices, etc., and achieve the effect of wide application range

Pending Publication Date: 2020-10-13
CHINA ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of complex structure, large additional mass and small vibration-absorbing frequency range in the prior art, the present invention provides a zero-frequency vibration-damping device and its manufacturing method

Method used

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  • Zero-frequency vibration reduction device and manufacturing method
  • Zero-frequency vibration reduction device and manufacturing method
  • Zero-frequency vibration reduction device and manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Embodiment 1: This embodiment provides a zero-frequency vibration reduction device, such as figure 1 shown.

[0053] The device includes: a plurality of connecting plates 1, a hollow protective shell 2, an elastic member 3 and a weight 4;

[0054] The elastic member 3 is an extendable device with a certain length, installed in the hollow part of the protective shell 2, the weight 4 is suspended on the elastic member 3, and the nonlinear energy slot theory is in the dynamic vibration absorber Based on the new shock absorber technology developed on the basis, by changing the linear stiffness and damping of the traditional shock absorbing system, the purpose of broadening the vibration absorbing frequency range and improving the shock absorbing effect is achieved. The weight 4 in the present invention has no power source and dynamic shock absorber and other additional devices, the mass is small, and the device is simple; the multiple connecting plates 1 are uniformly hing...

Embodiment 2

[0069] The installation scheme of the zero-frequency vibration damping device provided in this embodiment, such as figure 2 shown.

[0070] The zero-frequency vibration damping device can be installed on the wire or on the split wire clamp.

[0071] The design principle of the zero-frequency damping device provided by the present invention is as follows: image 3 As shown, the advantage of geometric nonlinearity is that linear springs can be used to achieve geometric nonlinearity. In the figure: f is the preload force of elastic member 3, l is the half length of elastic member 3, k is the elastic coefficient, and F is the weight 4 gravity, Δs is the displacement of the midpoint, and Δl is the axial elongation of the elastic member.

[0072] As shown in the following formula, the left side of the equal sign is a vector triangle, and the right side is a deformation triangle:

[0073]

[0074] And the corresponding geometric relationship is:

[0075] l 2 +Δs 2 =(l+Δl) ...

Embodiment 3

[0098] This embodiment provides a method for manufacturing a zero-frequency vibration damping device, including:

[0099] Step 1: hanging the weight 4 on the elastic member 3;

[0100] Step 2: installing the elastic member 3 inside the protective shell 2;

[0101] Step 3: Connect a plurality of connecting plates 1 outside the protective shell 2, hang on the spacer bar frame through the connecting plates 1, and further install on the multi-split transmission wire.

[0102] Before step 1 also include:

[0103] Determine the quality of the weight 4 according to the quality of the power transmission wire, and the quality of the weight 4 is the preset specific gravity of the quality of the wire;

[0104] Determine the length of the elastic member 3 according to the quality of the weight 4 .

[0105] The length of the elastic member 3 is determined according to the quality of the weight 4, as shown in the following formula:

[0106]

[0107] Wherein, F is the gravity of the w...

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Abstract

The invention discloses a zero-frequency vibration reduction device and a manufacturing method. The zero-frequency vibration reduction device comprises a plurality of yoke plates (1), a protective shell (2), an elastic piece (3) and a heavy block (4). The elastic piece (3) can extend and is arranged in the hollow part of the protective shell (2), and the heavy block (4) is suspended on the elasticpiece (3). The yoke plate (1) is hinged to the protective shell (2). The device is suspended on a multi-split transmission conductor through a yoke plate (1). The geometric nonlinear elastic piece isintroduced to reduce vibration in a wide vibration frequency domain, the yoke plate can be connected to a wire and can also be connected with the wire through the eight-split wire clamp, vibration reduction of multiple strands of wires through a single device is achieved, and the application range is wide. The device has the characteristic of multidirectional vibration, the heavy block not only can move up and down, but also can move vertically and move in other directions due to the sum of orthogonal vectors of the heavy block and the heavy block, vibration in all directions caused by external factors to the power transmission wire can be absorbed, and the device can be installed and used under various working conditions.

Description

technical field [0001] The invention relates to the field of disaster prevention and mitigation of power grids, in particular to a zero-frequency vibration reduction device and a manufacturing method. Background technique [0002] Wind-induced vibration of power transmission lines is a common natural disaster that seriously threatens the safe and stable operation of conductors. Phenomenon. Among them, breeze vibration and ice-covered galloping generally have obvious vertical vibration characteristics, but due to the large difference in frequency domain characteristics, they generally adopt different measures to prevent and control them. Those who use double pendulum anti-dance devices, damping spacers, etc. to prevent, the function of each fitting is relatively single and the control effect is limited. [0003] However, at present, the vibration reduction devices on the transmission wires are all designed for the vibration and resonance interval of a specific frequency dom...

Claims

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Application Information

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IPC IPC(8): H02G7/14
CPCH02G7/14
Inventor 程永锋王景朝赵彬刘彬费香泽杨加伦陈予恕展雪萍李鹏姬昆鹏张立春
Owner CHINA ELECTRIC POWER RES INST
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