RU43520U1 - LOW-SERVICED ELECTRIC DRIVE FOR ARROW TRANSFER - Google Patents

Abstract

The solution relates to railway automation, serves to switch the wits of the railroad switch. The technical result consists in increasing the vandal protection of the switch electric drive and increasing its corrosion resistance and wear resistance. the result is achieved by the fact that the electric drive at the joint of the cover with the housing is equipped with axle clamps, the cover is equipped with heat-protective material, the most wearing parts are made of wear-resistant composite materials, including oil-filled ones.

Description

The proposed solution relates to means of controlling the position of the railway track on the turnout

A solution is known (Certificate No. 26506 of the Russian Federation for the utility model “Switch electric drive”), in which the electric drive consists of a housing and a hinged lid, a number of units and mechanisms are mounted in the housing, including an electric motor, knife automatic switches, a kinematic group for moving the gate and control rulers . A number of parts and components of the electric drive are made of self-lubricating materials, namely: inserts of friction clutch disks; auto-switch lever rollers, main shaft bearings and gears of the main shaft block.

The disadvantages of the solution are: low protection of the drive against vandal interference (cover axes can be easily removed, which ensures cover opening and access to mechanisms); low thermal protection, which leads to the formation of condensate and corrosion damage; not all of the most wearing parts are made of wear-resistant materials.

At the same time, the solution is known (Patent No. 33078 of the Russian Federation for the utility model “Low-maintenance switch electric drive”), where the electric drive consists essentially of units, assemblies and mechanisms similar to the solution indicated above, but some products have anti-corrosion protection, special protection, special geometry in in some sections, the lid is equipped with hygroscopic material, the lid lock is equipped with a code locking system, and the electric drive is equipped with an alarm system for opening the lid.

The disadvantages of the solution are: insufficient vandal proof; insufficient thermal protection; insufficient wear resistance of some of the most wearing parts.

The technical result of the proposed solution is to increase the vandal resistance of the drive, increasing its corrosion resistance and wear resistance. This is achieved by supplying the drive with means for fixing the axes of the hinges of the lid and housing, which increases vandal resistance, the lid is equipped (from the inside) with heat-protective material, which reduces the possibility of condensation and thereby increases the corrosion resistance of nodes and parts, a number of the most worn parts are made of composite wear-resistant materials , including some of them - from self-lubricating composite wear-resistant materials.

Figure 1 - shows a schematic diagram of an electric drive (the cover is conditionally removed; figure 2 - takes into account the hinged connection of the cover with the housing, figure 3 - option of equipping the cover with heat-protective material; figure 4 - individual parts of the drive.

The device consists of a housing 1 and a cover (not shown in Fig.), Conditionally removed). The cover is hinged to the body, the axis 2 of the hinges are fixed to the body. The cover 3 is equipped with clamps 4 axles 2, eliminating the possibility of removing the axles without removing the clamps. The simplest lock can be an emphasis 5, welded to the lid.

This increases the vandal resistance of the drive, as it is possible to remove the cover for vandal purposes (without opening the lock) by removing the axes only after the elimination (cutting down, etc.) of the clamps.

A number of units and mechanisms are placed in the housing 1, including an electric motor 6, a knife auto-switch 7, a kinematic group consisting of a gearbox 8, a main shaft 9 and providing movement of the gate 10 and control rulers 11.

To reduce the possibility of condensation inside the drive and. thus, to increase the corrosion resistance of parts, assemblies, assemblies and mechanisms located in the housing, the cover is equipped with heat-protective material 12. It compensates for the temperature difference (gradient) inside and outside the drive, which reduces the possibility of condensation. Heat-protective material! 2 it is enough to place it on the lid as on the most heat-transferring element. The material 12 is more technologically positioned inside the lid and only on part of its surface. The brand of material 12 is not critical, it is important that the coefficient of its thermal conductivity is significantly different from the thermal conductivity of the cover material. The execution of the means of fastening the material 12 to the cover is not essential.

Aggregates and mechanisms located in the housing 1 contain units and parts interacting with each other. As a result of the interaction, they wear out with different intensities. The most wearing parts include a sleeve 13 in the housing 1, which serves as a guide for the moving gate 10, a sleeve 14 for the housing 1, which serves as a guide for the moving rulers 11, gear wheels, bearings, auto-switch rollers and others. To increase their wear resistance, they are made of composite wear-resistant materials obtained by powder metallurgy. The nomenclature of such materials is well known. A feature of the proposed solution is that the materials for the parts are selected based on the conditions of wear so as to ensure their equal resource or multiple in relation to each other. For example:

a) the materials of the bushings 13, 14, the bearings of the gearbox 8 and the rollers of the automatic switch (not shown in Fig.) are selected so that they are replaced during wear at the same time;

c) the materials of the bushings 13 and 14 are chosen the same with the estimated life of 2 years, the material of the bearings of the gearbox is 8 with the estimated life of 6 years, the material of the rollers of the auto-switch is selected with a life of 4 years, this means that when repairing the drive after 2 years, only the bushings need to be replaced, still after 2 years - rollers and bushings again, after 2 years - again bushings and rollers again.

Such selection of materials by operational properties allows to reduce the complexity of repair of the electric drive.

The specified materials of parts in the composition of their composition may have those elements, in such quantity, that affect the coefficient of friction of the material, for example carbon and its modification. This ensures "self-lubrication" of the friction pair, which includes at least one part made of such a material, which increases the resource and reliability of the electric drive.

The phenomenon of “self-lubrication” can be further increased (the friction force is reduced in the friction pair) if a lubricating fluid is introduced into the “composition” of the material. To do this, the material of the part is sintered by powder metallurgy with a certain porosity, and then “impregnated” with oil, i.e. filled with oil pores.

Due to the specified versions of the materials of the parts, an additional effect is achieved - more increase in wear resistance, lower costs for repair of the electric drive.

In particular, an effect can be achieved to reduce the cost of servicing the electric drive by eliminating the need for lubrication. So. for example, an appropriate selection of materials of bearings and gears in the gearbox 8 can eliminate the need for filling the gearbox with oil and filling it with oil during operation.

Claims (3)

1. The electric drive is low-maintenance for turnout, comprising a housing with a cover, in which a number of units and mechanisms are mounted, including an electric motor, a knife automatic switch, a kinematic group that provides movement of the gate and control rulers, characterized in that it is equipped with latches for fixing axes of the cover to the housing , the cover is provided with heat-protective material, the most wearing parts are made of wear-resistant composite materials, in particular bushings in the case for the gate and control rulers - from self-lubricating materials. 2. The drive according to claim 1, characterized in that the operational properties of the materials of the most wearing parts are selected from the condition of either an equal resource or a multiple resource of parts. 3. The drive according to claim 1, characterized in that the composite materials of the most wearing parts are made porous, the pores are filled with a lubricating fluid.