CN101368356A - Track Noise Controller - Google Patents

Abstract

The invention discloses a railway noise controller which is installed on a rail, belonging to the noise control field. The noise controller comprises a restraint layer component, a damping layer, a pin roll, a mass block, a retainer pin, a dynamic vibration absorber shell, a wedge-shaped block and an elastic layer. The damping layer is installed at the waist, the flange and the bottom of the rail, and is fixed by the restraint layer component and the dynamic vibration absorber shell. The restraint layer component and the dynamic vibration absorber shell are connected through the pin roll, and the wedge-shaped block applies clamp force on the restraint layer component and the dynamic vibration absorber shell. The dynamic vibration absorber shell with the mass block is installed at the bottom of the rail and the mass block is connected with the shell through the elastic layer. The railway noise controller effectively reduces noise of the rail in the aspect of noise source. The railway noise controller can be installed on the rail and requires no bond for adhibiting, and is low in cost and convenient to maintain. The restraint layer component, the pin roll, the mass block, the retainer pin, the dynamic vibration absorber shell and the wedge-shaped block can be used repeatedly, and the damping layer and the elastic layer are convenient to replace.

Description

Track Noise Controller

technical field

The invention relates to a rail traffic noise control device, in particular to a rail noise controller installed on rails.

Background technique

At present, the prevention and control of rail transit train running noise mainly adopts noise reduction measures such as sound barriers and sound insulation windows, and carries out noise prevention and control from the transmission route. However, the construction cost of the sound barrier is high and the cycle is long, which affects the maintenance of the line by the construction workers, and the noise reduction effect of the sound barrier is also affected by the distance from the track to the barrier, which is difficult to meet the application requirements under various environmental conditions.

As a new track noise control technology for track noise control, track noise controller can control train running noise from the perspective of sound source. The patent application number is 200610023902.2, the examination and approval announcement number is 1807756, and the patent name is "dynamic vibration absorption multi-layer restraint damping rail muffler". The Chinese invention patent application discloses a multi-layer restraint damping rail muffler. Multi-layer constrained damping is pasted on the waist and rail wings, and the multi-layer constrained damping is high elastic energy consumption material layer, first mass layer, first damping layer, first constrained layer, second damping layer, second constrained layer from inside to outside , the third damping layer, the third constraining layer and the protective layer. The disadvantages of this invention are: 1. Only paste multi-layer noise damping on the rail waist and rail wing of the railway rail, and the rail bottom is not installed for noise suppression equipment, so that the vibration and noise reduction effect of the invention is not perfect; 2. It is difficult to replace the damping material of the middle layer after the damping layer is aged.

Contents of the invention

The technical problem to be solved by the present invention is to propose a track noise controller, install a constrained damping layer on the rail waist, rail wing and rail bottom, and install a dynamic vibration absorbing device on the rail bottom, and the constrained damping layer and the vibration absorbing device work together to control the rail The radiation of high, medium and low frequency noise, the damping material and elastic material in the present invention can be replaced after aging, and other components of the noise controller can be reused.

The technical solution adopted by the present invention to solve its technical problems is:

A track noise controller of the present invention is composed of a constrained layer member, a damping layer, a pin shaft, a mass block, a back-stop pin, a dynamic vibration absorber shell, a wedge block, and an elastic layer. The upper part of the constrained layer member is a plate that matches the surface of the rail waist and the rail wing, and the lower part has a curved lower arm with a pin hole. The inner surface of the curved lower arm has a slope, and the end of the curved lower arm With a hook, the inner surface of the hook is provided with a stop pin, the dynamic vibration absorber shell is a box body, the box body is equipped with a mass block, and the upper end of the box body has a pin hole; Under the action of the vibration absorber shell, it is closely attached to the surface of the rail. The pin shaft connects the constrained layer member and the dynamic vibration absorber shell through the pin shaft hole. Between the inclined surfaces of the inner surface of the lower arm, the anti-retraction pin cooperates with the lower surface of the wedge block to lock the wedge block to prevent it from falling off. tight force, the elastic layer covers the surface of the mass block, and the mass block and the elastic layer realize the dynamic vibration absorption effect. The masses are spheres or blocks. The elastic layer is laid on the upper and lower surfaces of the mass block or only on the bottom surface of the mass block, and the mass block is connected with the dynamic vibration absorber shell 6 through the elastic layer.

The damping layer of the present invention is installed on the rail waist, rail wing and rail bottom to suppress medium and high frequency vibration and noise radiation of the rail; the dynamic vibration absorbing device is installed on the rail bottom to reduce low frequency rail vibration.

The beneficial effects of the present invention are: the track noise controller of the present invention is a new device for track noise control using constrained damping and dynamic vibration absorption technology, the device can effectively reduce the noise of rail traffic from the perspective of sound source, and suppress the height of the rail. , Medium and low frequency noise radiation, to achieve the purpose of noise control from the source. At the same time, the device has low cost, convenient installation and maintenance, and does not affect public works construction. The present invention can be used alone or in combination with the sound barrier to obtain greater noise reduction effect. The invention can be conveniently installed on the steel rail, and does not need to use adhesive on the steel rail for sticking. The constrained layer member, pin shaft, quality block, back-stop pin, dynamic vibration absorber shell and wedge block of the present invention can be reused, and the damping layer and elastic layer can be easily replaced.

Description of drawings

Fig. 1 is a three-dimensional structure diagram of the present invention.

Fig. 2 is an A-direction view of the present invention.

Fig. 3 is A-A sectional view of the present invention.

Fig. 4 is a perspective view of a constrained layer member of the present invention.

Fig. 5 is a perspective view of the dynamic vibration absorber housing of the present invention.

In the figure: 1 constraining layer member, 2 damping layer, 3 pin shaft, 4 mass block, 5 stop pin, 6 dynamic vibration absorber shell, 7 wedge block, 8 elastic layer.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

As shown in Figure 1, the damping layer 2 is respectively covered on the two sides of the rail waist and the rail wing and the bottom surface of the rail. The damping layer 2 is made of high damping rubber. The damping layer 2 is covered with the constrained layer member 1, the lower part of the constrained layer member 1 has two pin holes, and the upper side of the dynamic vibration absorber housing 6 has two pin holes, and the pin 3 passes through the pin holes to constrain The layer member 1 is connected to the dynamic vibration absorber housing 6 . The clamping force between the constrained layer member 1 and the dynamic vibration absorber and the rail surface is implemented through the wedge block 7. The end of the curved lower arm of the constrained layer member 1 has a hook, and the inner surface of the lower arm is an inclined plane, and the inclination of the inclined plane The degree is matched with the side of the wedge block, and the wedge block 7 is installed between the outer surface of the dynamic vibration absorber housing 6 box and the slope of the inner surface of the lower arm of the constraining layer member 1, and the stop pin 5 and the wedge block 7 The lower surface cooperates to lock the wedge-shaped block 7 to prevent it from falling off due to vibration. The mass block 4 is installed in the box body of the dynamic vibration absorber shell 6. The mass block is a steel ball. A layer of elastic layer 8 is laid on the top and bottom of the mass block, or only A layer of elastic layer 8 is laid on the bottom, the elastic layer is high elastic rubber, and the mass block is connected with the dynamic vibration absorber housing 6 through the elastic layer. The constrained layer components and the shell of the dynamic vibration absorber are made of cast steel; the mass block 4 can be metallic or non-metallic, in the shape of beads or fragments, or in the shape of square or rectangular blocks.

The invention is installed at the rail waist, rail wing and rail bottom of the rail between two sleepers, and restraint damping is applied to the rail waist, rail wing and rail bottom, and dynamic vibration is adopted at the rail bottom; the rail waist is a damping layer from inside to outside 2. The upper part of the constraining layer member 1 suppresses the medium and high frequency vibration and noise radiation of the rail. At the same time, a shell 6 with a mass block is installed on the bottom of the rail. The mass block 4 is connected to the shell 6 through the elastic layer 8 in the shell 6. A dynamic vibration absorber is used to reduce low frequency rail vibration. The constrained layer member is connected to the dynamic vibration absorber shell through the intermediate connection structure and the clamping force is applied by the wedge block 7 . The damping layer 2 and the elastic layer 8 can be easily replaced, and the constrained layer member 1, the pin shaft 3, the mass block 4, the stop pin 5, the dynamic vibration absorber shell 6 and the wedge block 7 can be reused.

In order to further verify the noise reduction effect of the track noise controller, the noise test of the track noise controller was carried out. In the test, three track noise controllers were installed on the 2m long steel rail, and the pulse excitation test was used to obtain a noise of 11.46dBA. Noise reduction effect, in which the noise reduction effect in the main frequency area of train operation reaches 13.91dBA, which is remarkable.

Claims (3)

1. A rail noise controller, characterized in that: it comprises a constrained layer member (1), a damping layer (2), a pin shaft (3), a mass block (4), a back-off pin (5), a dynamic shock absorber Shell (6), wedge block (7) and elastic layer (8); the upper part of the constrained layer member (1) is a plate that matches the surface of the rail waist and the rail wing, and the lower part has a pin The curved lower arm of the hole, the inner surface of the curved lower arm has a slope, the end of the curved lower arm has a hook, and the inner surface of the hook is provided with a stop pin (5); the dynamic shock absorber The housing (6) is a box body with a mass block (4) inside the box body, and a pin hole at the upper end of the box body; the damping layer (2) is acted by the constrained layer member (1) and the dynamic vibration absorber shell (6) Closely attached to the surface of the rail, the pin shaft (3) connects the constrained layer member (1) and the dynamic vibration absorber shell (6) through the pin shaft hole, and the wedge block (7) is installed in the box of the dynamic vibration absorber shell (6) Between the outer surface of the body and the slope of the inner surface of the curved lower arm of the constraining layer member (1), the stop pin (5) cooperates with the lower surface of the wedge block (7) to lock the wedge block (7) to prevent it from falling off. The function of the wedge block (7) is to make the constrained layer member and the dynamic vibration absorber exert clamping force on the damping layer (2) and the surface of the rail, and the elastic layer (8) covers the surface of the mass block (4). 2. The track noise controller according to claim 1, characterized in that: the mass (4) is a sphere or a block. 3. The track noise controller according to claim 1, characterized in that: the elastic layer (8) is laid on the upper and lower surfaces of the mass block (4) or only on the bottom surface of the mass block (4).

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