CN111926629A - Multistage steel rail particle shock absorber - Google Patents

Abstract

The invention discloses a multi-stage steel rail particle vibration absorber, which includes a buckle, a clamping space and a particle vibration absorber. The buckle covering the bottom surface of the rail is in a U-shaped structure and cooperates with the two-sided arc surfaces of the rail to form the clamping space , a particle vibration absorber is arranged in the clamping space, and the particle vibration absorber includes a casing, a vertical support, a horizontal support and a particle mass block. For fitting, a vertical bracket is vertically arranged in the casing, a horizontal bracket is horizontally arranged on the vertical bracket, and particle mass blocks are symmetrically installed at both ends of the horizontal bracket. Through the above method, the present invention provides a multi-order rail particle shock absorber, which can effectively deal with the wide-band and multi-band vibration and noise of the rail system caused by different working conditions of the vehicle. A variety of working conditions can effectively reduce the vibration and noise of the track system.

Description

A multi-order rail particle damper

technical field

The invention relates to the field of shock absorbers, in particular to a multi-stage steel rail particle shock absorber.

Background technique

The vibration and noise problem brought by rail transit is also becoming more and more prominent. The vibration and noise of rail transit not only affects the surrounding living and working environment, but also affects the effective operation of the railway system. In order to meet the requirements of environmental standards, it may cause the train to reduce the running speed and reduce the frequency, thereby reducing the economic benefits of rail transportation.

One of the main sources of vibration and noise in rail transit is the vibration and noise generated when the track and the wheels are in contact. The impact is not limited to the vicinity of the track, but also spreads to surrounding buildings through the roadbed, or to the train car through the wheels, causing the car body to vibrate. and further generate noise.

SUMMARY OF THE INVENTION

The main technical problem solved by the present invention is to provide a multi-stage rail particle damper, which has the following beneficial effects:

1 The mass system is directly connected to the horizontal support 23, no initial starting force is required in its working state, it can respond in time when there is a slight vibration, and its sensitivity is good;

2. The product stiffness and frequency can be continuously adjusted by adjusting the relative position of the particle mass block 24 on the horizontal support 23, which can realize the continuous adjustment of the frequency, and the adjustment method is convenient, simple and effective;

3 The size of the particle mass block 24 is not changed when adjusting the frequency, which ensures that the vibration reduction effect will not be reduced;

4 The friction and collision between the particle group inside the particle mass block and the inside of the shell, between the partitions and between the particle group consumes a lot of vibration energy, which can effectively reduce the structural response caused by external excitation;

5 Each shock absorber contains multiple vibration reduction systems with different frequencies, which can effectively cope with load conditions of various frequencies and effectively reduce the vibration and noise of the track system.

In order to solve the above-mentioned technical problems, a technical solution adopted by the present invention is to provide a multi-stage steel rail particle vibration absorber, which includes a buckle, a clamping space, and a particle vibration absorber, and the buckle covered on the bottom surface of the rail has a U-shaped structure. And it cooperates with the two-sided arc surfaces of the rail to form a clamping space, and a particle vibration absorber is arranged in the clamping space. The particle vibration absorber includes a shell, a vertical support, a horizontal support and a particle mass block. The two-sided arc surfaces of the rails and the inner side walls of the buckles fit together, a vertical bracket is vertically arranged in the casing, a horizontal bracket is horizontally arranged on the vertical bracket, and two ends of the horizontal bracket are symmetrically installed with The particle mass block; the particle mass block is composed of a shell, a partition plate, and a particle group buffer material, and the particle group is composed of one or more steel balls, lead balls, aluminum balls, plastic balls with different diameters. The particles are composed of balls, and the particle group is arranged and limited by the partition plate, and is accommodated in the shell.

In a preferred embodiment of the present invention, the shell surface of the outer shell has a rounded structure.

In a preferred embodiment of the present invention, the buckles are arranged at equal intervals along the rail.

In a preferred embodiment of the present invention, the vertical support is in an inverted T-shaped structure, and the lower half of the vertical support is in an arc shape and is in close contact with the rail.

In a preferred embodiment of the present invention, the horizontal support is fixed within a range of 30% to 70% of the height of the vertical support.

The beneficial effects of the present invention are as follows: the multi-stage rail particle damper provided by the present invention has the following beneficial effects:

1 The mass system is directly connected to the horizontal support 23, no initial starting force is required in its working state, it can respond in time when there is a slight vibration, and its sensitivity is good;

2. The product stiffness and frequency can be continuously adjusted by adjusting the relative position of the particle mass block 24 on the horizontal support 23, which can realize the continuous adjustment of the frequency, and the adjustment method is convenient, simple and effective;

3 The size of the particle mass block 24 is not changed when adjusting the frequency, which ensures that the vibration reduction effect will not be reduced;

4 The friction and collision between the particle group inside the particle mass block and the inside of the shell, between the partitions and between the particle group consumes a lot of vibration energy, which can effectively reduce the structural response caused by external excitation;

5 Each shock absorber contains multiple vibration reduction systems with different frequencies, which can effectively cope with load conditions of various frequencies and effectively reduce the vibration and noise of the track system.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, under the premise of no creative work, other drawings can also be obtained from these drawings, wherein:

Fig. 1 is a side view of a preferred embodiment of a multi-stage rail particle damper of the present invention;

2 is a cross-sectional view of a preferred embodiment of a multi-stage rail particle damper of the present invention;

FIG. 3 is a top view of a preferred embodiment of a multi-stage rail particle damper of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The most effective way to control vibration and noise is to take measures from the vibration source or block the transmission path of vibration and noise. Therefore, as shown in Figure 1-3, in this embodiment, a dynamic shock absorber is installed on the track to lower the track from the source. vibration. Specifically: a multi-stage steel rail particle vibration absorber, comprising a buckle 1, a clamping space, and a particle vibration absorber 2. The buckle 1 covered on the bottom surface of the rail 1000 has a U-shaped structure and is in phase with the two-sided arc surface of the rail 1000. Cooperate to form a clamping space, a particle vibration absorber 2 is arranged in the clamping space, and the particle vibration absorber 2 includes a shell 21, a vertical support 22, a horizontal support 23 and a particle mass block 24, and the shell 21 is respectively connected to the rail. The double-sided arc surfaces of the 1000 and the inner side wall of the buckle 1 fit together, a vertical bracket 22 is vertically arranged in the outer casing 21, and a horizontal bracket 23 is horizontally arranged on the vertical bracket 22. The horizontal bracket 23 Both ends of the particle mass block 24 are symmetrically installed. The vertical support 22 and the horizontal support 23 are generally metal materials (steel, copper, aluminum, etc.), composite materials (carbon fiber rods, glass fiber rods, etc.) The rigidity system of the device; the particle mass block is composed of a shell, a partition plate, and a particle group buffer material, and the particle group is composed of one or more steel balls, lead balls, aluminum balls, plastic balls with different diameters. It is composed of spherical balls, and the particle group is arranged and limited by the partition plate, and is accommodated in the shell.

Among them, the buckle 1 is generally a metal material, and is used to fix the shock absorber on a specific position of the track.

Wherein, the shell surface of the outer shell 21 has a rounded structure. The shell 21 is generally composed of rubber and polymer materials, and is mainly used as a peripheral skeleton and peripheral protection;

Further, the buckles 1 are arranged at equal intervals along the rail 1000 .

Further, the vertical support 22 is in an inverted T-shaped structure, and the lower half of the vertical support 22 is in an arc shape and is close to the rail 1000 .

Further, the horizontal support 23 is fixed within a range of 30% to 70% of the height of the vertical support 22 .

The working principle on which the above embodiment is based is:

A shock absorber is added to the track structure. When the track structure is subjected to an external dynamic force (such as vehicle load), the shock absorber device provides a force with an almost equal frequency and the opposite direction of the movement of the structure to partially offset the structure caused by external excitation. response. In order to achieve the best damping effect, it is usually necessary to adjust the frequency of the damping device to be close to the frequency that needs to be damped.

Among them, the vibration damper frequency calculation principle is:

Frequency calculation: According to the structural dynamics, the frequency calculation formula of the shock absorber is as follows:

(1)

(1)

(2)

(2)

为圆频率；k为刚度；m为质量；f为频率

is the circular frequency; k is the stiffness; m is the mass; f is the frequency

Because the running vehicle will produce a variety of different working conditions, the vibration and noise of the rail system have the characteristics of wide frequency band and multi frequency band. The use of conventional single-frequency dynamic shock absorbers has limited effect. Therefore, the use of shock absorbers with multi-order frequency functions can effectively cope with various working conditions and effectively reduce the vibration and noise of the rail system.

To sum up, the present invention provides a multi-stage rail particle damper, which has the following beneficial effects:

1 The mass system is directly connected to the horizontal support 23, no initial starting force is required in its working state, it can respond in time when there is a slight vibration, and its sensitivity is good;

2. The product stiffness and frequency can be continuously adjusted by adjusting the relative position of the particle mass block 24 on the horizontal support 23, which can realize the continuous adjustment of the frequency, and the adjustment method is convenient, simple and effective;

3 The size of the particle mass block 24 is not changed when adjusting the frequency, which ensures that the vibration reduction effect will not be reduced;

4 The friction and collision between the particle group inside the particle mass block and the inside of the shell, between the partitions and between the particle group consumes a lot of vibration energy, which can effectively reduce the structural response caused by external excitation;

5 Each shock absorber contains multiple vibration reduction systems with different frequencies, which can effectively cope with load conditions of various frequencies and effectively reduce the vibration and noise of the track system.

The above descriptions are only the embodiments of the present invention, and are not intended to limit the scope of the patent of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description of the present invention, or directly or indirectly applied in other related technical fields, are all applicable. Similarly, it is included in the scope of patent protection of the present invention.

Claims (5)

1. A multi-stage steel rail particle vibration absorber is characterized in that, comprising a buckle, a clamping space, a particle vibration absorber, and the buckle covered on the bottom surface of the rail is in a U-shaped structure and is formed in cooperation with the double-sided arc surface of the rail. A clamping space, a particle vibration absorber is arranged in the clamping space, and the particle vibration absorber includes a shell, a vertical support, a horizontal support and a particle mass block, and the shell is respectively connected with the double-sided arc surface of the rail, the buckled The inner side walls are in contact with each other, a vertical bracket is vertically arranged in the casing, a horizontal bracket is horizontally arranged on the vertical bracket, and the two ends of the horizontal bracket are symmetrically installed with particle mass blocks; the particle mass blocks are composed of Shell, separator, and particle group buffer material, the particle group is composed of one or more steel balls, lead balls, aluminum balls, and plastic balls with different diameters, and the particle group is composed of a separator Arrange the limit and accommodate it in the casing. 2 . The multi-stage steel rail particle vibration damper according to claim 1 , wherein the shell surface of the outer shell has a rounded structure. 3 . 3 . The multi-stage rail particle damper according to claim 1 , wherein the clips are arranged at equal intervals along the rail. 4 . 4 . The multi-stage steel rail particle damper according to claim 1 , wherein the vertical support has an inverted T-shaped structure, and the lower half of the vertical support is arc-shaped and closely adheres to the rail. 5 . 5 . The multi-stage steel rail particle damper according to claim 1 , wherein the horizontal support is fixed within a range of 30% to 70% of the height of the vertical support. 6 .

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