RU2831999C2 - Method of screen suspension in ballast cleaning machine - Google Patents

Abstract

FIELD: railway track repair.

SUBSTANCE: invention relates to railway track repair, particularly, to ballast cleaning machines. Method of screen suspension in ballast cleaning machine includes installation of screen supports on suspensions between pairs of hydraulic cylinders fixed on frame, providing change of screen inclination angle. Screen supports are mounted on suspensions with shock-absorbing devices attached to pairs of hydraulic cylinders fixed on the frame, having the possibility of turning in the plane parallel to the screen axis.

EFFECT: higher efficiency of screening, reduced effect of vibration on frame, higher operation rate.

1 cl, 1 dwg

Description

The invention relates to devices for repairing railway tracks, in particular to ballast cleaning (gravel cleaning) machines.

During operation, the ballast prism is constantly clogged with both bulk cargo from passing trains and small fractions of soil coming from the defective area of the roadbed, as well as small particles of crushed stone when it is destroyed under the influence of train loads. As a result, the ballast prism loses its necessary properties, which leads to the need for its periodic cleaning.

The process of cleaning crushed stone involves cutting and feeding ballast to the transport system, sifting and removing contaminants on a screen, transporting and unloading the cleaned crushed stone on the road.

(Track machines: Textbook / M.V. Popovich, V.M. Bugayenko, B.G. Volkovoynov et al.; Edited by M.V. Popovich, V.M. Bugayenko. - M.: State Educational Institution "Educational and Methodological Center for Education in Railway Transport", 2009. - 820 p.)

It is known that the most common method of cleaning ballast is based on sifting the contaminant through the openings of the sifting surface (sieve) of the crushed stone cleaning working element with relative movements of the said surface and the cleaned ballast. The screens of modern machines operate on this principle.

(Track machines: Textbook / M.V. Popovich, V.M. Bugayenko, B.G. Volkovoynov et al.; Edited by M.V. Popovich, V.M. Bugayenko. - M.: State Educational Institution "Educational and Methodological Center for Education in Railway Transport", 2009. - 820 p.)

One of the main factors determining the productivity of the screen is the intensity of vibration impact on the cleaned ballast, while in ballast cleaning machines the limiting factor is the possibility of transmitting vibration from the screen to the frame.

In the mining industry, there are two main methods of installing screens: on a foundation or support, and hanging from the building's floors.

(Crushing, grinding and preparation of raw materials for enrichment: Textbook / E.E. Andreev, O.N. Tikhonov. St. Petersburg State Mining Institute (Technical University). St. Petersburg, 2007. 439 p.)

Although the suspension of the screens significantly reduces the vibration impact on the foundation, and in the case of ballast cleaning, the impact on the frame, the suspension of the screens is not used in ballast cleaning machines.

The installation and fastening of screens to the frame of the ballast cleaning machine were not considered in the patents. Suspension of screens in ballast cleaning machines is not used.

The closest to the proposed technical solution is patent RU 2234989 C1 SCREEN OF A GRAVEL CLEANING MACHINE, which uses supports made in the form of shock absorbers. The disadvantage of this method of installing the screen, it should be noted that the installation of the screen was not the subject of patenting, is the transmission of vibration to the frame and the inability to change the angle of inclination and move the screen to a horizontal position to replace the screens.

A similar patent is RU 2199620 C2 SCREEN OF A GRAVEL CLEANING MACHINE, which also uses supports made in the form of shock absorbers, and as in the above-mentioned patent were not the subject of patenting, have exactly the same disadvantages - transmission of vibration to the frame and the inability to change the angle of inclination and move the screen to a horizontal position to replace the screens.

The objective of the invention is to increase the actual productivity of screening contaminated ballast in a ballast cleaning machine and to reduce the impact of vibration on the frame.

The essence of the invention consists in reducing the impact of vibration on the frame and increasing the productivity of screening contaminated ballast due to the possibility of changing the angle of inclination of the screen during operation, simplifying the replacement and cleaning of sieves, achieved as a result of suspending the screen using hydraulic cylinders attached to the frame.

The essence of the invention is explained in Fig. 1 - a general view of the screen with supports, shock-absorbing suspensions and hydraulic cylinders.

On frame 1, between pairs of hydraulic cylinders or mechanical jacks 2.3 and 4.5, the screen supports 6 are supported by suspensions 7, with shock-absorbing devices, for example using a spring kit.

The hydraulic cylinders have the ability to rotate in a plane parallel to the longitudinal axis of the screen around rollers 8, 9.

Vibration damping devices or materials 10, 11 can be placed at the junction of the hydraulic cylinder rod with the shock-absorbing suspension and the cylinder base with the frame.

The advantage of the proposed method in comparison with known methods is higher actual productivity due to increased ease of maintenance and the ability to change the angle of the screen depending on the parameters of the ballast being cleaned and in reducing the impact of vibration on the frame.

As a result of calculations, it was established that the implementation of the proposed method, in comparison with known methods, will increase the actual productivity by more than 1.6 times.

Claims (1)

A method for suspending a screen in a ballast cleaning machine, including installing screen supports on hangers between pairs of hydraulic cylinders secured to a frame, providing a change in the angle of inclination of the screen, characterized in that the screen supports are installed on hangers with shock-absorbing devices attached to pairs of hydraulic cylinders secured to a frame, having the ability to rotate in a plane parallel to the screen axis.