CN112271908A

CN112271908A - Capacitor pressing device in electric locomotive converter

Info

Publication number: CN112271908A
Application number: CN202011398207.0A
Authority: CN
Inventors: 乔聪梅; 巩金明; 朱杭杭; 朱云鹏; 宋进民
Original assignee: CRRC Yongji Electric Co Ltd
Current assignee: CRRC Yongji Electric Co Ltd
Priority date: 2020-12-04
Filing date: 2020-12-04
Publication date: 2021-01-26

Abstract

The invention relates to a capacitor compacting structure in a converter, in particular to a capacitor compacting device in the converter of an electric locomotive. The problem of the electric capacity that the electric capacity closing device in the current locomotive converter exists bears the ability weak of external force impact on the non-perpendicular direction that compresses tightly is solved. The capacitor pressing device comprises a cabinet frame plate, a bolt screwed on the cabinet frame plate and a base plate; a support assembly is arranged between the lower end of the bolt and the base plate, and the support assembly consists of a support seat and a sliding support; the supporting seat is in a barrel shape with an open upper end, the lower end of the sliding support is in spherical hinge with the inner cavity of the supporting seat, the upper surface of the sliding support is provided with a screw hole with the lower end of a bolt screwed into the screw hole, the supporting seat is fixed on the backing plate, and the central line of the supporting seat is perpendicular to the backing plate. The invention is particularly suitable for main converters of new eight-shaft electric locomotives, rejuvenated 160 km electric locomotives, harmonious HXD2B and other alternating current transmission electric locomotives, and is also suitable for compressing capacitors in converters in other fields.

Description

Capacitor pressing device in electric locomotive converter

Technical Field

The invention relates to an electric locomotive converter, in particular to a capacitor compacting structure in the converter, and specifically relates to a capacitor compacting device in the electric locomotive converter.

Background

The converter of the electric locomotive is used for an alternating current transmission locomotive, and the weight and the volume of a capacitor in the converter are large. In order to ensure that the capacitor cannot vibrate and impact due to the action of external forces such as inertia force, friction force and the like generated by bad working conditions in the operation process of a locomotive after being arranged at a designated position, and even cause the capacitor to be damaged and not work normally, a proper pressing device is required to be adopted to reliably press the capacitor, so that the capacitor cannot be displaced and loosened under the working conditions of long-term vibration and impact, reliably works, and meets the requirements of various operation working conditions of the locomotive.

The converter cabinet of the electric locomotive converter adopts a modular design, the structure is compact, and the internal layout space is limited. In order to compress the capacitor, a cabinet body frame plate fixed with the inner wall of the converter cabinet is arranged above the capacitor mounting position, a bolt vertical to the upper surface of the capacitor is screwed on the cabinet body frame plate, a base plate vertical to the bolt is fixed at the lower end of the bolt, the bolt is screwed, the base plate is compressed on the upper surface of the capacitor (shell) by the bolt, and the bolt transmits the pressing force to the capacitor through the base plate, so that the capacitor is compressed. In the conventional capacitor compression structure, the capacitor is completely rigidly positioned in the non-vertical compression direction (the bolt applies vertical pressure to the capacitor through the backing plate). The compressing structure is simple and easy to manufacture, but the fatal defect is that the capacity of the capacitor for bearing external force impact in the non-vertical compressing direction is weaker, and when the capacitor is subjected to sudden external force in the non-vertical compressing direction, the capacitor is easy to break through rigid constraint and move relative to the base plate, so that the compressing is ineffective, or the capacitor (a shell) is damaged by pressure.

Disclosure of Invention

The invention solves the problem that the capacity of a capacitor in the existing capacitor pressing device in the current transformer of the electric locomotive is weaker in the capacity of bearing external force impact in the non-vertical pressing direction, and provides the capacitor pressing device in the current transformer of the electric locomotive. The device can make the electric capacity bear the vibration and the impact of different dynamics of various directions.

The invention is realized by adopting the following technical scheme: the capacitor pressing device in the electric locomotive converter comprises a cabinet body frame plate, a bolt and a base plate, wherein the cabinet body frame plate is arranged above a capacitor mounting position and is fixed with the inner wall of a converter cabinet of the converter; a support assembly is arranged between the lower end of the bolt and the base plate, and the support assembly consists of a support seat and a sliding support; the supporting seat is in a barrel shape with an open upper end, the lower end of the sliding support is in spherical hinge with the inner cavity of the supporting seat, the upper surface of the sliding support is provided with a screw hole with the lower end of a bolt screwed into the screw hole, the supporting seat is fixed on the backing plate, and the central line of the supporting seat is perpendicular to the backing plate. In work, the bolt applies pressing force in the vertical direction to the capacitor through the supporting assembly and the base plate; because the supporting component is additionally arranged between the bolt and the base plate, the supporting seat can realize 360-degree rotation around the bolt and the leftward and rightward swinging (the leftward and rightward swinging angle can reach 10 degrees at most) by taking the bolt as a central line, so that the capacitor is elastically or non-rigidly positioned in the non-vertical pressing direction when being pressed in the vertical direction, when the capacitor receives sudden external force in the non-vertical pressing direction, the capacitor (and the base plate and the supporting seat are driven) can rotate or swing in the non-vertical pressing direction to buffer the sudden external force in the non-vertical pressing direction, thereby improving the capacity of bearing external force impact of the capacitor in the non-vertical pressing direction, and further avoiding pressing failure or capacitor pressure loss.

Further, the bottom surface of the inner cavity of the supporting seat is a conical surface with a downward conical top, and a bottom spherical surface (arc surface) of the sliding support is in contact with the bottom surface of the inner cavity of the supporting seat. By changing the shape of the bottom surface of the inner cavity of the supporting seat and enabling the bottom spherical surface of the sliding support to be in contact with the bottom surface of the inner cavity of the supporting seat, the size of the downward transmission pressing force of the supporting seat is increased and the direction of the pressing force is kept unchanged all the time while the supporting seat can rotate and swing relative to the sliding support, so that reliable pressing is ensured, the structure of a product is optimized, and the performance of the product is improved.

The capacitor pressing device in the electric locomotive converter has the advantages of compact and simple structure and safe and reliable pressing mode, can bear vibration and impact of different forces in various directions under severe operating environment, and is convenient to install and maintain. The invention is particularly suitable for main converters of new eight-shaft electric locomotives, rejuvenated 160 km electric locomotives, harmonious HXD2B and other alternating current transmission electric locomotives, and is also suitable for compressing capacitors in converters in other fields.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a structural cross-sectional view of the support assembly;

FIG. 3 is a structural outline view of the support assembly;

fig. 4 is a schematic view of the pad structure and the connection with the support assembly.

In the figure: 1-bolt, 2-lock nut, 3-washer, 4-cabinet frame plate, 5-snap nut, 6-support component, 6.1-support seat, 6.2-sliding bearing, 7-capacitor, 8-backing plate body and 9-rubber pad.

Detailed Description

The capacitor pressing device in the electric locomotive converter comprises a cabinet body frame plate 4, a bolt 1 and a base plate, wherein the cabinet body frame plate 4 is arranged above a capacitor mounting position and is fixed with the inner wall of a converter cabinet of the converter; a support assembly 6 is arranged between the lower end of the bolt 1 and the base plate, and the support assembly 6 consists of a support seat 6.1 and a sliding bearing 6.2; the supporting seat 6.1 is in a barrel shape with an open upper end, the lower end of the sliding support 6.2 is in a spherical hinge with an inner cavity of the supporting seat 6.1, a screw hole for screwing the lower end of the bolt 1 into the screw hole is formed in the upper surface of the sliding support 6.2, the supporting seat 6.1 is fixed on the backing plate, and the central line of the supporting seat 6.1 is perpendicular to the backing plate. Further, the bottom surface of the inner cavity of the supporting seat 6.1 is a conical surface with a downward conical top, and the bottom spherical surface (arc surface) of the sliding support 6.2 is in contact with the bottom surface of the inner cavity of the supporting seat 6.1. The backing plate consists of a backing plate body 8 and a rubber pad 9 fixed (for example, adhered) on the lower surface of the backing plate body 8; the rubber pad 9 can prevent the pressure loss of the pad plate to the upper surface of the capacitor (shell); the periphery of the pad body 8 is bent downwards to surround the periphery of the rubber pad 9, so that the rubber pad 9 is protected. The bottom surface of the support seat 6.1 of the support assembly 6 is fixed (e.g. welded) to the upper surface of the backing plate body 8, thereby realizing the fixation of the support seat 6.1 and the backing plate. A locking nut 2 and a washer 3 which are matched with the bolt 1 are arranged on the cabinet frame plate 4, and a snap nut 5 which is matched with the bolt 1 is fixed below the cabinet frame plate 4; the hexagon head bolt 1 sequentially passes through the locking nut 2, the washer 3, the cabinet frame plate 4 and the snap nut 5 and is screwed into a screw hole on a sliding bearing 6.2 of the supporting component 6; screwing the hexagon head bolt 1 according to a certain torque, so that the rubber pad 9 on the backing plate is reliably contacted and pressed with the capacitor; and finally, the locking nut 2 and the snap nut 5 are screwed, so that the bolt 1 is screwed on the cabinet frame plate 4.

Claims

1. A capacitor pressing device in a converter of an electric locomotive comprises a cabinet body frame plate (4) which is arranged above a capacitor mounting position and fixed with the inner wall of a converter cabinet of the converter, a bolt (1) which is screwed on the cabinet body frame plate (4) and is vertical to the upper surface of a capacitor, and a base plate; the bolt is characterized in that a supporting component (6) is arranged between the lower end of the bolt (1) and the base plate, and the supporting component (6) consists of a supporting seat (6.1) and a sliding bearing (6.2); the supporting seat (6.1) is in a barrel shape with an open upper end, the lower end of the sliding support (6.2) is hinged to the inner cavity of the supporting seat (6.1) in a spherical mode, a screw hole is formed in the upper surface of the sliding support (6.2) in a screwed mode, the lower end of the bolt (1) is screwed into the screw hole, the supporting seat (6.1) is fixed on the base plate, and the center line of the supporting seat (6.1) is perpendicular to the base plate.

2. Capacitor pressing device in an electric locomotive converter according to claim 1, characterized in that the bottom surface of the cavity of the support base (6.1) is a conical surface with a downward conical top, and the bottom spherical surface of the sliding support (6.2) is in contact with the bottom surface of the cavity of the support base (6.1).

3. Capacitor pressing device in a power car converter according to claim 1 or 2, characterized in that the pad is formed by a pad body (8) and a rubber pad (9) fixed to the lower surface of the pad body (8).

4. Capacitor hold-down device in an electric locomotive converter according to claim 3, characterized in that the periphery of the pad body (8) is bent downwards to surround the periphery of the rubber pad (9).

5. Capacitor pressing device in an electric locomotive converter according to claim 4, characterized in that the bottom surface of the support seat (6.1) of the support assembly (6) is fixed to the upper surface of the pallet body (8).

6. The capacitor pressing device in the current transformer of the electric locomotive according to claim 5, characterized in that the cabinet frame plate (4) is provided with a lock nut (2) and a washer (3) which are matched with the bolt (1), and a snap nut (5) which is matched with the bolt (1) is fixed under the cabinet frame plate (4).