Elastic rail fixing device

Abstract

The invention relates to rail accessories, in particular to an elastic rail fixing device. The elastic rail fixing device is disposed on a base of a sleeper, fixedly connected with the sleeper through anchoring bolts and characterized by further comprising a guide component and a vertical support element. The guide component comprises guide elements and a guide supports, wherein the guide elements are disposed on two sides of a rail wed of a steel rail, and the guided elements are clamped by the guide supports. Each guide element comprises at least part of elastic high polymer material or / and a metal spring. Relative motion between the steel rail and the guide supports is achieved by the aid of elastic deformation of the guide elements. Transverse rigidity, along the steel rail, of each guide element is at least 2.5 times higher than vertical rigidity, along the steel rail, of each guide element. Vertical rigidity of the vertical support element is not lower than that of each guide element. The elastic rail fixing device has the advantages that vertical rigidity is guaranteed while high transverse rigidity is achieved, under the circumstance that vibration isolation effect is guaranteed, rail gauge variation is smaller, transverse vibration of wheel tracks is smaller, transverse shaking of trains is smaller, mutual transverse sliding between the wheel tracks is smaller, abrasion is low, and comfortableness and safety of trains are higher.

Description

technical field [0001] The invention belongs to the field of rail transportation, and relates to a rail accessory, in particular to a rail fixing device with both the fastener function and the vibration reduction function. Background technique [0002] Today's rail transit continues to develop in the direction of high speed and heavy load, which brings convenience to people's production and life, but also brings many problems, especially the environmental pollution caused by track noise. In order to reduce the noise of the track, technicians have developed many vibration and noise reduction products, including rail fixing devices with vibration and noise reduction functions. For example, the patent application No. 200480019707.1 and the patent application No. The track fastening device that can realize the suspension of the railway track, it utilizes the bracket to support the rail head on the elastic member. In this fastening system, a gap is designed under the rail bottom...

AI Technical Summary

Problems solved by technology

[0003] (1) The rails fixed by this type of rail fixing device cannot withstand the upward force, so there are safety hazards in use

For example, when foundation subsidence occurs, the rail fixing device will drop along with the foundation, but since the rail is continuous, the rail will not move down with it, so an uplifting force will be generated, which may cause the rail fixing device to affect the rail. Support failure, affecting driving safety;

[0004] (2) During use, the force point will change up and down when the force is applied, there will be wear between the elastic body and the rail, and the stability will decrease after the elastic part is worn;

[0005] (3) The rail only keeps in contact with the elastic body, so the elastic body should provide both vertical support and lateral restraint for the rail, and the vertical stiffness and lateral stiffness are closely related. The vertical stiffness of the elastic body in the rail fixing device is relatively small, so the lateral stiffness of the rail is also small, resulting in large rail lateral vibration and rail head shimmy during driving, resulting in reduced comfort when the train is running. The wear is serious, and in some cities there are even a large number of abnormal corrugations, which seriously affect driving safety;

[0006] (4) Since the rail is in a suspended state, the safety reserve is very small, and there is no secondary protection. Once the elastic body is damaged, the geometric position of the rail will lose control in all directions, which will cause the train to derail. Therefore, this kind of rail fixing device requires maintenance. Higher, if the maintenance is not timely, it will affect driving safety

[0007] Cologne eggs and other high-elastic high-elastic fasteners also have similar problems. Since the lateral stiffness of the fastener is closely related to the vertical stiffness, the vertical stiffness decreases continuously with the increase in vibration damping requirements, and the lateral stiffness also decreases, resulting in The lateral vibration of the wheel and rail increases, and the lateral shaking of the train increases, which affects the comfort of the train and aggravates the wear of the rail. In severe cases, it even causes abnormal corrugation of the rail, which increases the workload of rail maintenance and seriously shortens the life of the rail.

[0008] The above-mentioned defects have greatly affected the normal use of the rails and caused great economic losses. The market urgently needs a new type of rail fixing device that can overcome the above-mentioned deficiencies

Images