WO2015023209A1 - Method for modernizing the housing of an electric traction motor for railway locomotive stock - Google Patents

Abstract

The invention relates to railway transport, and more particularly to railway locomotive stock. Claimed is a method for modernizing the housing of an electric traction motor for railway locomotive stock which includes the disassembly of elements of the traction motor, wherein upon disassembly of the outside surface of the housing, lines are marked for the cutting out of fastening sites for plain axle bearings, taking into account the allowance required for machining of the contours of the cutouts, the fastening sites for plain axle bearings are cut out along the lines marked, and the contours of the cutouts are machined. Longitudinal bars are welded to the machined sites, the housing is subjected to heat treatment, the longitudinal bars for fastening the housing of rolling axle bearings are machined, and necks for the mounting of end shields are machined. If necessary, damaged elements of the housing are repaired once the longitudinal bars have been weldingly attached. Furthermore, the necks are welded on prior to the heat treatment. The invention makes it possible to use electric traction motors manufactured with plain axle bearings in standardized wheel-motor units with rolling axle bearings.

Description

 METHOD FOR MODERNIZING THE POWER OF THE TRACTION ELECTRIC MOTOR FOR THE TRACTION ROLLING COMPOSITION OF RAILWAYS

FIELD OF TECHNOLOGY

 The invention relates to railway transport, namely to traction rolling stock of railways.

 BACKGROUND

 At present, wheel-motor blocks with motor-axial plain bearings of various designs and methods of lubrication are widely used on the traction rolling stock of railways, and first of all, freight. The common disadvantages of these bearings are large friction losses, and, as a result, a small efficiency, constant supervision due to high lubrication requirements and the risk of overheating, high lubricant consumption, uneven wear of the bearing and axle, the use of expensive materials for the manufacture of bearings , the relatively high complexity of manufacturing, which leads to a significant amount of maintenance and significant cash costs, as well as a limited service life due to wear.

 Today, in the production of new traction rolling stock of railway transport, unified wheel-motor blocks with motor-axial rolling bearings are used, which are more reliable and do not require large expenditures during operation and maintenance.

However, the presence of old, but working, wheel-motor units equipped with traction motors, housing which are manufactured for motor-axial bearings, sets the task to ensure the use of these electric motors to create wheel-motor blocks with motor-axial rolling bearings, which will make it possible at small costs to equip the rolling stock with more efficient rolling bearings.

 In the railway transport industry, equipment modernization methods are known, for example, a method for upgrading a drain device of a railway tank for oil products (Ukrainian patent for utility model N ° 52878, F16K 27/00, published September 10, 2010), a method for upgrading the stop of the front socket of the spine beam of a railway transport means (patent of Ukraine for utility model N ° 67254, F28F 9/00, publ. 10.02.2012), a method of modernization of a pointer electric drive (patent of the Russian Federation for the invention JY ° 2325296, B61L 5/06, publ. 27.05.2008). However, these methods and devices do not apply to the modernization of the housing of traction motors for rolling stock of railway transport.

The prior art of the claimed technical solution is known from the repair technology, which includes the dismantling of the elements of the traction motor, replacement of faulty parts and assemblies with new or repaired, assembly, inspection and regulation. (Order of the State Administration of Railway Transport of Ukraine of July 28, 1 1 N ° 451-IJ “Rules for the repair of electric cars of diesel locomotives and diesel trains” CT-0205, “Rules for the repair of electric cars of electric locomotives and electric trains” CT-0204, Kiev, 2012). This the method does not provide the possibility of using such an engine with motor-axial rolling bearings, which provide high reliability and increase the life of the rolling stock.

 SUMMARY OF THE INVENTION

 The basis of the invention is the task to create a method of modernizing the body of a traction motor with motor-axial sliding bearings to equip it with motor-axial rolling bearings, which ensures an increase in the operating line and reliability, as well as cost reduction during maintenance of traction rolling stock of railway vehicles.

The problem is solved in that in the method of modernization of the traction motor housing for the traction rolling stock of railways, including the dismantling of the elements of the traction motor, in accordance with the invention, after dismantling on the outer surface of the housing, cut out lines of support points for mounting motor-axial plain bearings taking into account allowances necessary for machining the contours of the cuts, cut along the marked lines of the mounting point of the motor-axial bearings, wire DYT machining contour recesses, after which the treated locations are welded longitudinal beams, subjected to heat treatment enclosure and the machining is performed under the longitudinal beams housing the motor-fastening axial rolling bearing necks and machining for mounting the bearing shields. If necessary, after welding the longitudinal beams, damaged elements of the body are restored.

 In addition, the necks are fused before heat treatment.

Due to the fact that in the case of the traction electric motor, support points are cut out along marked lines for mounting the motor-axial sliding bearings, taking into account the allowances necessary for machining the contours of the cuts, they carry out the machining of the contours of the cuts and longitudinal beams are welded to the machined places, providing structural possibility to connect the traction an electric motor that worked with plain bearings to the housing of motor-axial rolling bearings. Heat treatment of the housing after welding the beams allows you to remove the internal stress arising during the cutting and welding, which ensures the reliability of the housing during operation, and the machining of the longitudinal beams for mounting the housing of the motor-axial rolling bearings and necks for installing the bearing shields allows you to securely fasten the housing of the traction motor to the housing of motor-axial rolling bearings and install bearing shields on the necks in accordance with the design requirements. Recovery of damaged housing elements if necessary, as well as filler neck for the installation of bearing shields additionally increases the operating lines of the housing of the traction motor after modernization of the housing.

The technical result of the invention is the provision of the possibility of using traction motors manufactured with motor-axial bearings in unified wheel-motor blocks with motor-axial rolling bearings by performing certain technological operations to partially change the design of the traction motor housing, which increases the operating lines and reliability, as well as reduces the cost of maintenance of traction rolling stock of railway vehicles.

 LIST OF DRAWINGS

 The essence of the method of modernizing the body of the traction motor is shown in more detail in the attached drawings, where:

 in FIG. 1 shows the body of the traction motor with the cut lines of support points for mounting motor-axial plain bearings;

 in FIG. 2 shows the body of the traction motor with machined contours of the notch;

 in FIG. 3 shows the body of the traction motor with welded longitudinal beams;

 in FIG. 4 shows a motor housing with holes for mounting a housing of motor-axial rolling bearings.

 MODE FOR CARRYING OUT THE INVENTION

 The method is implemented as follows.

To modernize the body of the traction motor, in the manner prescribed by the rules of repair and repair and construction documentation, dismantle all parts and components of the traction motor to provide access to its body (Fig. 1). On the outer surface of the housing of the traction motor, lines 1 of the cutout of the support points for mounting motor-axial plain bearings, taking into account allowances for machining the contours of cutouts. The attachment points of the motor-axial plain bearings are cut out along marked lines using, for example, a gas burner, plasma or electric arc cutting, and the cut-out contours are machined (Fig. 2). After that, longitudinal beams are welded to the treated places 2. If necessary, the body elements that were damaged when removing the attachment points of the motor-axial plain bearings are restored, and the necks 3 are welded to fit the bearing shields. Next, heat treatment of the body is carried out to relieve internal stresses arising in the process of cutting and welding. After that, the longitudinal beams 2 are mechanically machined to mount the motor-axial rolling bearings and neck 3 to mount the bearing shields, and the machining of the surfaces of the electric motor housing, including drilling holes in the longitudinal beams 2 to mount the motor-axial rolling bearings, is carried out in in accordance with the mounting dimensions and requirements established for a particular wheel-motor unit.

 The traction motor housing, which was modernized in this way, makes it possible to equip it with motor-axial rolling bearings.

In order to improve the technical characteristics and extend the line of service for the cases of electric motors ED-118A, ED-118B, TE-006, NB-418, NB-514, TL2K, NB-407, NB-412, ED-133, EDU-133P all modifications of LLC “Scientific and Technical Center“ Drive ” offers a technology for their modernization during overhaul with technical inspection and at the same time extending the service life and resources of the main units of the main and shunting locomotives. Modernization allows in a relatively short time and at relatively low cost to improve the technical characteristics of the rolling stock of railway transport, to increase the effective use of existing traction electric motors.

Claims

CLAIM  1. A method of modernization of the traction motor housing for the traction rolling stock of railways, including the dismantling of the elements of the traction motor, characterized in that after dismantling on the outer surface of the housing, cut-out lines of support points for fastening the housing of the motor-axial plain bearings taking into account the allowances necessary for mechanical processing contours of cuts, cut along marked lines of the mounting point of the motor-axial plain bearings, conduct machining of the contours of the cut call, after which the treated locations are welded longitudinal beams, subjected to a heat treatment enclosure and the machining is performed under the longitudinal beams housing the motor-fastening axial rolling bearing necks and machining for mounting the bearing shields.  2. The method according to claim 1, characterized in that after welding the longitudinal beams, damaged elements of the body are restored.  3. The method according to claim 1, 2 characterized in that the necks are welded before heat treatment.