RU2703851C1 - Contact insert for current collector of trolleybus - Google Patents

Abstract

FIELD: electric transport.

SUBSTANCE: invention relates to current collectors of vehicles. Contact insert for the current collector of the trolleybus is made in the form of a plate with a working part in the form of a chute corresponding to the shape of a contact wire, with symmetrical bells on ends. Side walls of the contact insert are solid and have a thickness in the working part equal to 31–35 % of the width of the contact insert. Depth of contact insert chute makes 41–70 % of contact wire diameter. Radius of said chute is 21–29 % larger than contact wire working surface radius.

EFFECT: technical result of disclosed invention is improved operational properties of contact insert and reduced wear of contact wire and bronze jaws.

1 cl, 3 dwg, 3 tbl

Description

FIELD OF THE INVENTION

The invention relates to devices for sliding current collection and can be used for urban electric transport (insert trolley buses) and in other machines with similar current collection conditions.

State of the art

A known design of the insert, made in the form of a plate of powder material with a groove corresponding to the shape of the contact wire, and equipped with inserts that occupy 5-10% of the working surface area and are placed in planes perpendicular to the contact surface with a depth equal to the wear limit of the insert (patent No. 2095258 dated 08/22/1995, class B60L 5/08). The disadvantage of the proposed design of the insert is that, along with a sufficiently high strength of the working part of the trough, its side walls are greatly weakened due to the proposed design and during the movement of the insert in the trolley bus collector due to high dynamic loads, the side walls of the insert are destroyed and the contact wire begins to wear expensive bronze cheek trolley bus collector and at the same time begins to wear itself. Despite the fact that the insert is not worn out yet, it has to be replaced.

A trolleybus current collector contact insert is made in the form of a plate with a flat working surface and spherical end parts, while the end parts are made in the form of sockets symmetrical with respect to the axis of symmetry, mating with the end and working surfaces, and the angle of inclination of the socket to the horizontal axis is 30- 60 ° (copyright certificate No. 465352 dated January 14, 1974, class B60L 5/00). The disadvantage of this design is that, along with a decrease in dynamic loads in the vertical plane, this design experiences high dynamic loads on the end part in the horizontal plane during operation and the side walls of the insert are also weakened, because they have a protrusion that does not allow to strengthen it and thereby reduces their operational stability due to wear of the side walls. This also starts the wear of the bronze cheek and contact wire.

The invention is known in which the contact insert of the trolleybus is made in the form of a plate with a working part corresponding to the shape of the contact wire and having a groove and symmetrical profiled sockets at the ends, while the width of the working part of the plate is 1.7-1.8 width and the radius of the gutter 1,0-1,2 radius of the working surface of the contact wire (patent No. 2108244 from 09/27/1996, CL B60L 5/00).

The disadvantage of this design is that it has a thin side wall of the insert and the radius of the gutter is 1.0-1.2 radius of the working surface of the contact wire.

Due to this design of the insert, when the trolleybus current collector moves along the contact network, it experiences significant dynamic loads in the horizontal plane, because in real conditions, the contact wire, even in the area equal to the length of the contact insert, has deviations of the radius of the surface of the contact wire in the horizontal plane to 20-30% of the nominal. Moreover, these deviations are the main source of significant dynamic loads acting in the horizontal plane. In addition, there is wear on the side wall of the insert due to its small width in the working part, while the insert that has not yet been worn down on the vertical plane changes to a new one, because wear of the bronze cheeks of the trolleybus current collector and the contact wire begins.

The closest in technical solution is the contact insert for the trolleybus current collector, made in the form of a plate with a working part in the form of a gutter, corresponding to the shape of a contact wire with symmetrical sockets at the ends, in which the side walls of the insert are solid and have a thickness in the working part of 20- 30% of the width of the insert, and the radius of the gutter is 30-40% larger than the radius of the working surface of the contact wire (patent No. 2259929 from 09/10/2005, IPC B60L 5/08).

The disadvantage of this invention is the small thickness of the wall of the insert: 5.6-8.4 mm, while the radius of the gutter is excessive. The measurements showed that the radius of the gutter equal to 21-29% of the radius of the contact wire is sufficient. Then the wall thickness can be increased up to 8.4-9.9 mm. In addition, the invention does not indicate the size of the depth of the gutter. This moment is very important in the process of the contact insert.

Disclosure of invention

The technical result of the claimed invention is to increase the operational properties of the contact. The technical result is achieved by reducing dynamic loads on the collector contact insert. In this case, an additional technical result is the almost complete exclusion of wear on the expensive cheeks of the current collector and the contact wire. The technical result is achieved in that the contact insert for the trolleybus current collector is made in the form of a plate with a working part in the form of a trough corresponding to the shape of the contact wire, with symmetrical sockets at the ends, while the side walls of the contact insert are solid and have a thickness in the working part equal to 31-35% of the width of the contact insert, the depth of the groove of the contact insert is 41-70% of the diameter of the contact wire, and the radius of the mentioned groove is 21-29% more than the radius of the working surface of the contact wire a.

The implementation of the contact insert with the specified parameters can significantly reduce the magnitude of the dynamic loads when the insert moves along the special parts and irregularities of the contact network in both vertical and horizontal planes.

Brief Description of the Drawings

FIG. 1 depicts a general exemplary view of the inventive contact insert.

FIG. 2 depicts an exemplary end view of the inventive contact insert.

FIG. 3 depicts an exemplary top view of the inventive contact insert.

The implementation of the invention

The contact insert 1 (Fig. 1) for the trolleybus current collector, made in the form of a plate, consists, for example, of a carbon-polymer composition, with a base 2 and a working part 3 (Fig. 2) in the form of a groove corresponding to the shape of the contact wire, with symmetrical sockets 4 at the ends 5, and the side walls 6 of the contact insert are solid and have a thickness in the working area equal to 31-35% of the width of the contact insert, the depth of the groove of the contact insert is 41-70% of the diameter of the contact wire, and the radius of the groove is 21 -29% more working radius the surface of the contact wire.

The contact insert for trolleybus current collectors works as follows: the contact insert 1 in the form of a plate is installed in the existing trolleybus current collector head in contact with the contact wire through which electric current flows. The ends 5 are made with symmetrical sockets 4 and are the entry parts of the working part 3.

Operating conditions of the contact insert for the trolleybus current collector: supply voltage 500-750 volts, temperature from minus 40 degrees to plus 40 degrees Celsius in any weather conditions.

The proposed design of the contact insert for the trolleybus current collector can significantly reduce the amount of dynamic loads in the horizontal plane, and therefore, reduce the number of breakdowns and the wear of the insert and increase its operational stability due to the fact that the working surface is made in the form of a groove, the end parts are made with symmetrical sockets and the side walls of the contact insert are solid and have a thickness in the working area equal to 31-35% of the width of the contact insert, the depth of the gutter ktnoy paste is 41-70% of the diameter of the trolley wire, and the radius of the trough to 21-29% larger than the radius of the working surface of the trolley wire.

The claimed invention can be used in existing current-receiving devices of trolley buses without making changes to the design of the current-receiving head.

Example 1. Contact inserts of the prototype (patent No. 2259929 dated 09/10/2005, IPC B60L 5/08) are made, for example, of a carbon-polymer composition and tested on the same route, one trolleybus in dry, clear weather, at an air temperature of plus 22 ° C to plus 26 ° C.

Example 2. The inventive contact inserts are made from the same composition and tested under conditions similar to example 1. The results are presented in table 1.

From the analysis of the results obtained, it follows that an increase in the radius of the groove of the working surface of the contact insert by more than 35% of the radius of the working surface of the contact wire leads to a significant increase in damage to the side wall as well as a decrease in radius to less than 31% of the radius of the contact wire.

The influence of the thickness of the side wall of the contact insert on the number of breakdowns was also determined. The results are presented in table 2.

The influence of the depth of the trench on the lateral wear of the insert wall was also determined.

From table 3 it follows that the greater the depth of the gutter, the less wear on the side walls of the contact insert, and, therefore, less wear on the cheeks of the current collector and the contact wire. But with a significant increase in the depth of the gutter, the thickness of the side walls decreases. The depth of the gutter is limited by the plate thickness obtained. Optimal is the formation of a gutter with a depth of 41-70% of the diameter of the contact wire.

As tests have shown, when the thickness of the side wall of the contact insert is less than 31% of the width of the contact insert, its premature wear occurs and, as a result, the number of breakdowns increases to 15% (as in the prototype). With a side wall width of more than 35% of the width of the contact insert, the radius of the gutter is significantly reduced, and this also significantly increases the dynamic loads on the side walls and the number of breakdowns increases dramatically.

In addition to increasing the service life of the contact insert for the trolleybus current collector, when using the proposed design, the wear of bronze cheeks, the contact wire, as well as the number of gathering rods on special parts, due to breakdowns are significantly reduced.

Thus, the use of a contact insert of the claimed design provides, in comparison with the prototype and known technical solutions, reducing wear and the number of breakdowns of the inserts due to a decrease in dynamic loads acting in the horizontal plane and an increase in the thickness of the side wall of the insert due to a change in its design. As a result, significantly reduces wear on the cheeks of the current collector and the contact wire. And gives a significant economic effect.

Claims (1)

The contact insert for the trolleybus current collector, made in the form of a plate with a working part in the form of a trough, corresponding to the shape of the contact wire, with symmetrical sockets at the ends, the side walls of which are solid, characterized in that the side walls of the contact insert have a thickness in the working part of 31 -35% of the width of the contact insert, the depth of the groove of the contact insert is 41-70% of the diameter of the contact wire, and the radius of the mentioned groove is 21-29% greater than the radius of the working surface of the contact wire.

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