CN201722566U

CN201722566U - Vibration absorber for rail web of steel rail

Info

Publication number: CN201722566U
Application number: CN2010202570755U
Authority: CN
Inventors: 朱晓君; 梁磊; 林新志; 瞿连辉
Original assignee: 725th Research Institute of CSIC
Current assignee: 725th Research Institute of CSIC
Priority date: 2010-07-14
Filing date: 2010-07-14
Publication date: 2011-01-26
Anticipated expiration: 2020-07-14

Abstract

The utility model relates to a vibration absorber for a rail web of a steel rail, comprising a vibration absorbing component and a fixture for fixing the vibration absorbing component (8). The vibration absorbing component is particularly a metal-rubber composite component; the shapes of one side edge and one bottom edge of a rubber piece in the vibration absorbing component are respectively adapted with the rail web and the bottom surface of the steel rail; three strip-shaped metal mass blocks are embedded at the inner part of the rubber piece; the mass of the three metal blocks keeps certain gradient difference; and the mass of the larger metal block is 1.5 to 4 times of that of the metal block with the similar mass. The vibration absorber has good vibration absorbing effect, and can reduce the vibration of the steel rail by more than 3dB.

Description

A kind of rail web of the rail bump leveller

Technical field

The utility model relates to a kind of field of track traffic technology, particularly a kind of rail web of the rail bump leveller.

Background technology

Track traffic progressively grows up after the city is built up, though before building, deeply assessed its influence degree to environment, but because orbital distance urban architecture facility is nearer, its generation vibration and noise still can badly influence the fatigue failure of traffic system corresponding apparatus and structure and surrounding building and equipment, shorten Acceptable life, the serious security of the lives and property that may influence people.

Studies show that wheel-rail noise accounts for very high ratio when train is normally exercised, reduce railroad noise, at first will reduce wheel-rail noise.The rail radiation mainly be middle and high audio-frequency noise, the radiation of wheel mainly be mid-frequency noise, the then main radiation low-frequency noise of sleeper.From the contribution of three to overall noise, rail is main radiation source, and wheel takes second place, the sleeper minimum.Therefore, it is significant to the urban traffic vibration and noise reducing to carry out the rail noise abatement.

The urban rail transit in China aspect has begun to widely apply spring secures rail to sleeper under the rail, in order to reduce train through the vibration of out-of-date generation to the destruction of neighboring buildings facility and the influence of resident living.But,, therefore, need take other measures that the vibration of rail itself is controlled so the vibration and noise that reduces rail itself is had little effect because elasticity is reduced part and mainly reduced vibration and transmit earthward under the rail.Owing to can't change the design of rail itself, can consider method by absorbing, additional mass spring resonance system on rail, the reaction force that produces when rail vibration makes the vibration of rail reduce.

Application number is that 200480009915.3 Chinese patent " rail damper " has been introduced and a kind ofly reduced the damper of rail vibration by resonance, but obtainable concrete effect is not described.

Summary of the invention

Technical problem to be solved in the utility model provides a kind of web of the rail bump leveller, is used for urban track traffic and administers with steel rail vibration damping noise reduction.

For the purpose that realizes solving the problems of the technologies described above, the utility model has adopted following technical scheme:

Web of the rail bump leveller of the present utility model, comprise damping means and the anchor clamps that are used for fixing this damping means, damping means is metal-rubber combined member, the profile on rubber parts a side and a base matches with the web of the rail and the bottom surface of rail respectively in the damping means, three strip metal quality pieces of the inner embedding of rubber parts, it is L type metal derby that the shape of three strip metal quality pieces is respectively the cross section, the cross section is rectangular bonding jumper, the cross section is trapezoidal bonding jumper, the quality of three metal derbies keeps certain gradient difference, 1.5～4 times of the quality that big metal derby is the approaching metal derby of quality.

Web of the rail bump leveller of the present utility model, further optimized technical scheme is: two limits of described L type metal derby in obtuse angle.

Web of the rail bump leveller of the present utility model, the form that the profile on rubber parts a side and a base matches with the web of the rail and the bottom surface of rail respectively in the damping means be for closely cooperating, and can combine closely under the effect of anchor clamps guaranteeing.

Rubber can be neoprene, acrylonitrile-butadiene rubber, polyurethane rubber.

Described anchor clamps are made up of spill ring and trip bolt, and spill ring bottom groove should be identical with flange of rail shape or matches, thereby guarantee the spill ring can be fixed on the rail and can not produce bigger slip.Trip bolt passes spill circulating application power fits tightly in the rail web of the rail side damping means, thereby guarantees that rail vibration is delivered to damping means.

Anchor clamps are laid along the rail bearing of trend, should guarantee that every pair of damping means has at least two anchor clamps to fix.The anchor clamps quantity that generally can select is 2-8.

Be fixed in rail web of the rail both sides by one-tenth symmetry shape about anchor clamps during use.Damping means according to the dynamic vibration absorber principle, at three metal quality pieces of the inner embedding of web of the rail bump leveller, makes product obtain a plurality of resonant frequency points on overall construction design; Simultaneously have certain loss ability, widened the resonant frequency range of product, thereby in than wider frequency, rail is all had good effectiveness in vibration suppression at elastomeric material.Three long strip type metal quality pieces suspend and place rubber inside, the shape of metal quality piece and size to produce in the scope of broad and resonant frequency that the vibration frequency of rail adapts.

Anchor clamps have the groove that matches with the rail foot shape, and by this groove, anchor clamps can be firm is fixed in rail foot, and trip bolt can make damping means closely fit with the rail web of the rail simultaneously.Stationary fixture is laid along the rail bearing of trend, should guarantee that every pair of damping means has at least two anchor clamps to fix.

These technical schemes comprise that further preferred technical scheme also can make up mutually or combination, thereby reach better technique effect.

By adopting technique scheme, rail web of the rail bump leveller of the present utility model has the better damping effect, and rail vibration is reduced more than the 3dB.

Description of drawings

Fig. 1 is a web of the rail bump leveller cross-sectional view.

Fig. 2 is a web of the rail bump leveller installation side view.

Among the figure, 1, rail head, 2, the web of the rail, 3, the flange of rail., 4, the metal quality piece, 5, rubber, 6, the spill ring, 7, trip bolt, 8, damping means, 9, anchor clamps, 10, rail.

The specific embodiment

As illustrated in fig. 1 and 2, web of the rail bump leveller of the present utility model comprises damping means 8 and anchor clamps 9.Rail 10 comprises rail head 1, the web of the rail 2 and the flange of rail 3.Damping means 8 be shaped as strip, its cross section should be consistent along curve with the side of rail near rail one side curve, so that damping means 8 can fit tightly with rail 10.The curve shape of opposite side can change according to the difference of jig Design.Damping means 8 is made up of metal quality piece 4 and rubber 5.Two identical damping means about 8 become symmetry shape to be fixed in the rail web of the rail 2 both sides.Metal quality piece 4 is the metal derby of three strips, and the quality of these three metal derbies should keep certain gradient difference, makes the intrinsic frequency difference of three metal derbies, thereby makes whole web of the rail bump leveller obtain a plurality of resonant frequency points in wider frequency.The shape of three metal quality pieces and spacing can be carried out moderate change.Rubber can be neoprene, acrylonitrile-butadiene rubber, polyurethane rubber etc., and it should have certain loss ability, can also introduce the application life that aging-proof agent improves web of the rail bump leveller in material simultaneously.As shown in Figure 1, anchor clamps 9 are made up of spill ring 6 and trip bolt 7.Spill ring 6 bottom grooves should be identical with the flange of rail 3 shapes, thereby guarantee spill ring 6 can be fixed on the rail 10 and can not produce bigger slip.Trip bolt 7 passes spill ring 6 application of forces fits tightly in the rail web of the rail 2 sides damping means 8, thereby guarantees that rail 10 vibrations are delivered to damping means 8.The basic function of anchor clamps 9 is fixing positions of damping means 8, so that the vibration-damping function of damping means 8 is better brought into play.Prerequisite lower clamp 9 at assurance function also can be designed to other shapes such as two lobe formula spill rings according to needs are installed.

Certainly, under the situation that does not break away from the utility model scope, can make many variations to the foregoing description.

Claims

1. web of the rail bump leveller, it is characterized in that: web of the rail bump leveller comprises damping means (8) and is used for fixing the anchor clamps (9) of this damping means (8), damping means (8) is metal-rubber combined member, a side of rubber parts and the profile on a base match with the web of the rail (2) and the bottom surface of rail respectively in the damping means (8), inner three the strip metal quality pieces (4) that embed of rubber parts, it is L type metal derby that the shape of three strip metal quality pieces (4) is respectively the cross section, the cross section is rectangular bonding jumper, the cross section is trapezoidal bonding jumper, the quality of three metal derbies keeps certain gradient difference, 1.5～4 times of the quality that big metal derby is the approaching metal derby of quality.

2. according to the described web of the rail bump leveller of claim 1, it is characterized in that: two limits of described L type metal derby in obtuse angle.

3. according to the described web of the rail bump leveller of claim 1, it is characterized in that: described anchor clamps (9) are made up of spill ring (6) and trip bolt (7), and spill ring (6) bottom groove should be identical with the flange of rail (3) shape.

4. according to the described web of the rail bump leveller of claim 1, it is characterized in that: every pair of damping means of described damping means (8) (8) has at least two anchor clamps (9) to fix.