A multi-stage rail liquid vibration damper

Abstract

The present invention discloses a multi-stage rail liquid shock absorber, including a buckle, a fixing space, and a liquid shock absorber. The buckle coated on the bottom surface of the rail is in a U-shaped structure and cooperates with the double-sided curved surfaces of the rail to form a fixing space. The fixing space is provided with a liquid shock absorber. The liquid shock absorber includes an outer shell, a vertical bracket, a horizontal bracket, and a liquid mass block. The outer shell fits with the double-sided curved surfaces of the rail and the inner side wall of the buckle respectively. A vertical bracket is vertically arranged in the outer shell, and a horizontal bracket is horizontally arranged on the vertical bracket. Liquid mass blocks are symmetrically installed at both ends of the horizontal bracket. Through the above method, the present invention provides a multi-stage rail liquid shock absorber. In view of the wide-band and multi-band vibrations and noises of the rail system caused by different vehicle working conditions, a shock absorber with multi-order frequency function is used to effectively cope with various working conditions and effectively reduce the vibration and noise of the rail system.

Description

Technical Field

[0001] The invention relates to the field of shock absorbers, and in particular to a multi-stage rail liquid shock absorber. Background Art

[0002] The vibration and noise problems caused by rail transit are becoming increasingly prominent. The vibration and noise of rail transit not only affect the surrounding living and working environment, but also affect the effective operation of the railway system. In order to meet the requirements of environmental standards, trains may reduce their running speed and reduce the frequency of trains, thereby reducing the economic benefits of rail transportation.

[0003] One of the main sources of rail transit vibration noise is the vibration and noise generated when the track and wheels come into contact. The impact is not limited to the vicinity of the track, but can also spread through the roadbed to surrounding buildings, or be transmitted to the train carriage through the wheels, causing the body to vibrate and further generate noise. Summary of the invention

[0004] The main technical problem solved by the present invention is to provide a multi-stage rail liquid damper, which has the following beneficial effects:

[0005] 1. The mass system is directly connected to the horizontal support. It does not require initial starting force in its working state and can respond promptly to slight vibrations with good sensitivity.

[0006] 2 The product stiffness and frequency can be continuously adjusted by adjusting the relative position of the liquid mass block on the horizontal bracket, which can achieve continuous frequency adjustment. The adjustment method is convenient, simple and effective;

[0007] 3. The size of the liquid mass block does not change when adjusting the frequency, which ensures that the vibration reduction effect will not be reduced;

[0008] 4 The liquid inside the liquid mass block generates dynamic lateral force during the shaking process to provide vibration reduction. Automatic activation performance is good, no starting device is required;

[0009] 5 Each shock absorber contains multiple vibration reduction systems of different frequencies, which can effectively cope with load conditions of various frequencies and effectively reduce the vibration and noise of the track system.

[0010] In order to solve the above technical problems, a technical solution adopted by the present invention is: to provide a multi-stage rail liquid vibration damper, including a clip, a fixing space, and a liquid vibration absorber. The clip coated on the bottom surface of the rail is in a U-shaped structure and cooperates with the double-side curved surfaces of the rail to form a fixing space. The liquid vibration absorber is arranged in the fixing space. The liquid vibration absorber includes an outer shell, a vertical bracket, a horizontal bracket and a liquid mass block. The outer shell is respectively fitted with the double-side curved surfaces of the rail and the inner side wall of the clip. A vertical bracket is vertically arranged in the outer shell, and a horizontal bracket is horizontally arranged on the vertical bracket. Liquid mass blocks are symmetrically installed at both ends of the horizontal bracket; the liquid mass block consists of a shell and a liquid encapsulated in the shell.

[0011] In a preferred embodiment of the present invention, the shell surface of the housing is a rounded structure.

[0012] In a preferred embodiment of the present invention, the buckles are arranged at equal intervals along the rail.

[0013] In a preferred embodiment of the present invention, the vertical support is an inverted T-shaped structure, and the lower half of the vertical support is arc-shaped and closely attached to the rail.

[0014] In a preferred embodiment of the present invention, the horizontal support is fixed within a height position range of 30% to 70% of the vertical support.

[0015] The beneficial effects of the present invention are as follows: the multi-stage rail liquid damper provided by the present invention has the following beneficial effects:

[0016] 1. The mass system is directly connected to the horizontal support. It does not require initial starting force in its working state and can respond promptly to slight vibrations with good sensitivity.

[0017] 2 The product stiffness and frequency can be continuously adjusted by adjusting the relative position of the liquid mass block on the horizontal bracket, which can achieve continuous frequency adjustment. The adjustment method is convenient, simple and effective;

[0018] 3. The size of the liquid mass block does not change when adjusting the frequency, which ensures that the vibration reduction effect will not be reduced;

[0019] 4 The liquid inside the liquid mass block generates dynamic lateral force during the shaking process to provide vibration reduction. Automatic activation performance is good, no starting device is required;

[0020] 5 Each shock absorber contains multiple vibration reduction systems of different frequencies, which can effectively cope with load conditions of various frequencies and effectively reduce the vibration and noise of the track system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0022] Figure 1 It is a side view of a preferred embodiment of a multi-stage rail liquid damper of the present invention;

[0023] Figure 2 It is a cross-sectional view of a preferred embodiment of a multi-stage rail liquid damper of the present invention;

[0024] Figure 3 It is a top view of a preferred embodiment of a multi-stage rail liquid damper of the present invention. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only 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 are within the scope of protection of the present invention.

[0026] The most effective way to control vibration noise is to take measures at the source of vibration or block the propagation path of vibration noise. Figure 1-3 As shown, this embodiment sets a dynamic vibration absorber on the track to reduce the track vibration from the source. Specifically: a multi-stage rail liquid vibration absorber, including a buckle 1, a clamping space, and a liquid vibration absorber 2. The buckle 1 wrapped on the bottom surface of the rail 1000 is in a U-shaped structure and cooperates with the double-sided curved surface of the rail 1000 to form a clamping space. The liquid vibration absorber 2 is arranged in the clamping space. The liquid vibration absorber 2 includes a shell 21, a vertical bracket 22, a horizontal bracket 23 and a liquid mass block 24. The shell 21 is respectively fitted with the double-sided curved surface of the rail 1000 and the inner wall of the buckle 1. The vertical bracket 22 is vertically arranged in the shell 21, and the horizontal bracket 23 is horizontally arranged on the vertical bracket 22. The liquid mass blocks 24 are symmetrically installed at both ends of the horizontal bracket 23. The vertical bracket 22 and the horizontal bracket 23 are generally made of metal materials (steel, copper, aluminum, etc.) or composite materials (carbon fiber rods, glass fiber rods, etc.). The vertical bracket 22 is mainly used for bearing weight, and the horizontal bracket 23 serves as the stiffness system of the shock absorber. The liquid mass block is composed of a shell and a liquid encapsulated in the shell.

[0027] The buckle 1 is generally made of metal material and is used to fix the shock absorber at a specific position on the track.

[0028] The shell surface of the shell 21 is a rounded structure. The shell 21 is generally made of rubber or polymer materials, and is mainly used as an outer frame and outer protection;

[0029] Furthermore, the buckles 1 are arranged at equal intervals along the rail 1000 .

[0030] Furthermore, the vertical support 22 is in an inverted T-shaped structure, and the lower half of the vertical support 22 is arc-shaped and closely attached to the rail 1000 .

[0031] Furthermore, the horizontal bracket 23 is fixed within a height position range of 30% to 70% of the vertical bracket 22 .

[0032] The working principle on which the above embodiments are based is:

[0033] A shock absorber is added to the track structure. When the track structure is subjected to external dynamic forces (such as vehicle loads), the shock absorber device provides a force with an almost equal frequency and opposite to the direction of structural movement to partially offset the structural response caused by external excitation. In order to achieve the best vibration reduction effect, it is usually necessary to adjust the frequency of the damping device to be close to the frequency that needs to be reduced.

[0034] Among them, the calculation principle of the shock absorber frequency is:

[0035] Frequency calculation: According to structural dynamics, the formula for calculating the frequency of the shock absorber is as follows:

[0036] (1)

[0037] (2)

[0038] is the circular frequency; k is the stiffness; m is the mass; f is the frequency

[0039] Since running vehicles will produce a variety of different working conditions, the vibration and noise of the track system have the characteristics of wide frequency band and multi-band. The conventional single-frequency dynamic shock absorber has limited effect, so the shock absorber with multi-order frequency function can effectively cope with a variety of working conditions and effectively reduce the vibration and noise of the track system.

[0040] In summary, the present invention provides a multi-stage rail liquid damper, which has the following beneficial effects:

[0041] 1 The mass system is directly connected to the horizontal support 23. It does not require initial starting force in its working state and can respond promptly to slight vibrations, with good sensitivity.

[0042] 2 The product stiffness and frequency can be continuously adjusted by adjusting the relative position of the liquid mass block 24 on the horizontal bracket 23, and the continuous adjustment of the frequency can be achieved. The adjustment method is convenient, simple and effective;

[0043] 3. When adjusting the frequency, the size of the liquid mass block 24 is not changed, thus ensuring that the vibration reduction effect will not be reduced;

[0044] 4 The liquid inside the liquid mass block generates dynamic lateral force during the shaking process to provide vibration reduction. Automatic activation performance is good, no starting device is required;

[0045] 5 Each shock absorber contains multiple vibration reduction systems of different frequencies, which can effectively cope with load conditions of various frequencies and effectively reduce the vibration and noise of the track system.

[0046] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A multi-stage rail liquid damper, characterized in that: It includes a buckle, a fixing space, and a liquid vibration absorber. The buckle wrapped on the bottom surface of the rail is in a U-shaped structure and cooperates with the double-sided curved surfaces of the rail to form a fixing space. The fixing space is provided with a liquid vibration absorber. The liquid vibration absorber includes a shell, a vertical bracket, a horizontal bracket, and a liquid mass block. The shell fits the double-sided curved surfaces of the rail and the inner side wall of the buckle respectively. A vertical bracket is vertically arranged in the shell, a horizontal bracket is horizontally arranged on the vertical bracket, and liquid mass blocks are symmetrically installed at both ends of the horizontal bracket; the liquid mass block consists of a shell and a liquid encapsulated in the shell; The vertical support is in an inverted T-shaped structure, and the lower half of the vertical support is arc-shaped and close to the rail; The horizontal support is fixed within a height position range of 30% to 70% of the vertical support.

2. The multi-stage rail liquid damper according to claim 1, characterized in that: The shell surface of the shell is a rounded structure.

3. The multi-stage rail liquid damper according to claim 1, characterized in that: The buckles are arranged at equal intervals along the rail.

Images