A capacitor assembly for a traction converter

Abstract

The utility model belongs to capacitor assembly technical field relates to converter cabinet, disclose a kind of capacitor assembly component for traction converter, including the capacitor of being installed in converter cabinet, the upper fixed lug of being provided with in the front end of capacitor upper side, the lower fixed lug of being provided with below;The upper fixed lug and lower fixed lug jointly fix the front end of capacitor on converter cabinet;The tail end of capacitor is fixed with limit block, and limit block is inserted into limit holder to realize fixation;The limit holder is fixed on the second structure beam of converter cabinet.The utility model fixed lug of capacitor front end limits the lateral displacement of capacitor;The limit block of rear end ensures to limit capacitor tail under the premise that steel material does not occur yielding, effectively limits the longitudinal and vertical displacement of capacitor tail end.

Description

Technical Field

[0001] This utility model belongs to the field of capacitor assembly technology, and relates to converter cabinets, specifically a capacitor assembly assembly for traction converters. Background Technology

[0002] Electric locomotive converters contain various high-voltage and low-voltage power devices, each playing its own role within the converter cabinet. The device assembly design is a crucial aspect in ensuring the converter's safety, economy, adaptability, and sustainability.

[0003] Existing converters contain capacitors such as grounding capacitors, filter capacitors, and support capacitors. Larger capacitors weigh around 50 kg and are approximately 800 mm long. Improper assembly of such large capacitors can alter their shape, reduce their capacitance, or even cause them to explode. For example... Figure 4 As shown, the common assembly involves the front fixing lug of the capacitor and the rear capacitor clamping block working together to fix the capacitor to the frame beam of the converter cabinet.

[0004] The disadvantages of this assembly method are as follows: 1) The pressure block is assembled at the tail of the capacitor, making it difficult to operate during the assembly, disassembly, and maintenance of the capacitor, which increases labor and time costs. 2) The capacitor clamping block needs to be assembled. It consists of rubber pads, clamping plates, bolts, clip nuts, sealant, etc. The process is complex and the production cost is high. 3) The capacitor pressure block is mainly made of rubber strips, which are prone to aging and require frequent maintenance, resulting in high maintenance costs; 4) High flatness is required for the capacitor mounting plate. If the mounting plate is deformed, the vertical stress of the pressure block will cause the capacitor to be damaged due to local stress concentration.

[0005] For capacitor assembly, this utility model designs a capacitor assembly component that is highly safe, widely applicable, and low in cost. Utility Model Content

[0006] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a capacitor assembly assembly for traction converters, solving the problems of complex operation, long assembly time, and high labor and time costs associated with current capacitor assembly techniques. Furthermore, this application uses a tail-end steel structure fixing component instead of a pressure block, which can effectively reduce production costs and decrease the vertical pressure on the capacitor caused by the pressure block assembly, thereby increasing the capacitor's service life.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a capacitor assembly for a traction converter, comprising a capacitor installed in a converter cabinet, wherein an upper fixing lug is provided above the front end of the capacitor and a lower fixing lug is provided below the front end; the upper fixing lug and the lower fixing lug together fix the front end of the capacitor to the converter cabinet; a limit block is fixed to the rear end of the capacitor, and the limit block is inserted into a limit bracket for fixation; the limit bracket is fixed to the second structural beam of the converter cabinet.

[0008] As a further technical solution, the bottom surface of the converter cabinet is provided with a support plate, the capacitor is fixed on the support plate, and the tail of the support plate is fixed to the second structural beam of the converter cabinet.

[0009] As a further technical solution, a first structural beam is provided at the front end of the converter cabinet, and a mounting hole is opened on the upper fixing ear, and a bolt is passed through the mounting hole to fix it to the first structural beam; a mounting hole is opened on the lower fixing ear, and a bolt is passed through the mounting hole to fix it to the front end of the support plate, thereby restricting the lateral displacement of the capacitor.

[0010] As a further technical solution, the support plate is provided with a slide rail for easy movement, and the capacitor is installed inside the slide rail.

[0011] As a further technical solution, the limiting block is a 3mm carbon steel plate, which is welded and fixed to the tail of the capacitor after sheet metal processing. The limiting block can ensure that the tail of the capacitor is limited without the steel material yielding.

[0012] As a further technical solution, the opening of the limiting bracket is provided with a flared mouth for easy insertion; a mounting hole is opened on the mounting surface at the rear, and a bolt is inserted into the mounting hole to fix the limiting bracket to the second structural beam.

[0013] As a further technical solution, the limiting bracket is made of 2mm stainless steel plate, which can restrict the capacitor in three directions and complete the fixed assembly of the capacitor.

[0014] As a further technical solution, the support plate is made of carbon steel plate with a yield strength ≥355MPa.

[0015] Compared with the prior art, the beneficial effects of this utility model are: 1. The capacitor front end is rigidly connected by bolts, which effectively restricts the lateral displacement of the capacitor; the tail end is designed with a flexible connection, which effectively expands the size chain fit of the capacitor assembly; reducing assembly material and labor costs and improving work efficiency.

[0016] 2. The opening of the limiting block is designed in the shape of a trumpet, which ensures that the capacitor can enter the limiting slot quickly and smoothly, thereby achieving rapid limiting of the capacitor and shortening the assembly time.

[0017] 3. The interference fit design of the limit holder and the limit block ensures the limit of the capacitor tail in both the longitudinal and vertical directions, ensuring the reliability of capacitor assembly. Attached Figure Description

[0018] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1 This is a structural assembly drawing of the present invention.

[0020] Figure 2 This is a structural diagram of the capacitor of this utility model.

[0021] Figure 3 This is a structural diagram of the limiting card holder of this utility model.

[0022] Figure 4 This is an assembly diagram of an existing capacitor structure.

[0023] In the diagram, 1-capacitor; 11-upper fixing ear; 12-lower fixing ear; 13-limiting block; 2-limiting bracket; 21-flare mouth; 22-mounting surface; 3-support plate; 4-slide rail; 5-first structural beam; 6-second structural beam; 7-pressure block. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example: Reference Figure 1-3 The diagram shows a capacitor assembly for a traction converter. The converter cabinet has a support plate 3 on its bottom surface, and a slide rail 4 for easy movement. A capacitor 1 is installed within the slide rail 4. An upper fixing lug 11 is located above the front end of the capacitor 1, and a lower fixing lug 12 is located below it. A first structural beam 5 is located at the front end of the converter cabinet, and a second structural beam 6 of the converter cabinet is fixed to the rear end of the support plate 3. Mounting holes are provided on the upper fixing lug 11, and bolts are inserted through these holes to fix it to the first structural beam 5. Mounting holes are also provided on the lower fixing lug 12, and bolts are inserted through these holes to fix it to the front end of the support plate 3. A limit block 13 is welded to the rear end of the capacitor 1, and the limit block 13 is inserted into a limit holder 2 for fixation. The opening of the limit holder 2 has a flared mouth 21 for easy insertion. Mounting holes are provided on the mounting surface 22 at the rear end, and bolts are inserted through these holes to fix the limit holder 2 to the second structural beam 6.

[0026] Furthermore, the limiting block 13 is made of 3mm carbon steel plate.

[0027] Furthermore, the limiting card holder 2 is made of 2mm stainless steel sheet.

[0028] Furthermore, the support plate 3 is made of carbon steel plate with a yield strength ≥355MPa.

[0029] like Figure 1-3 As shown, the assembly process of this utility model is as follows: The limiting bracket 2 is bolted to the second structural beam 6, pushing the capacitor 1 along the slide rail 4 to the position of the limiting bracket 2. The limiting block 13 at the tail of the capacitor 1 is inserted into the flared opening 21 of the limiting bracket 2, and the capacitor continues to move until the limiting block 13 contacts the limiting bracket 2 in the upper, left, and right directions, achieving an interference fit. Bolts are inserted into the upper fixing ear 11 at the front end of the capacitor 1 for fixing to the first structural beam 5; bolts are inserted into the lower fixing ear 12 for fixing to the front end of the support plate 3.

[0030] Two fixed lugs work together to limit the lateral displacement of capacitor 1; the limiting block 13 ensures that the tail of capacitor 1 is limited without the steel material yielding. The limiting bracket 2 and the limiting block 13, through an interference fit, effectively reduce the longitudinal and vertical displacement of the tail of capacitor 1, limiting the displacement value to a small range, thus ensuring the overall assembly of capacitor 1 is safe and reliable.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A capacitor assembly for a traction converter, comprising a capacitor (1) installed in a converter cabinet, characterized in that: The capacitor (1) has an upper fixing ear (11) above its front end and a lower fixing ear (12) below its front end; the upper fixing ear (11) and the lower fixing ear (12) together fix the front end of the capacitor (1) to the converter cabinet; the capacitor (1) has a limit block (13) fixed at its tail end, and the limit block (13) is inserted into the limit card seat (2) to achieve fixation; the limit card seat (2) is fixed on the second structural beam (6) of the converter cabinet.

2. The capacitor assembly for a traction converter according to claim 1, characterized in that: The bottom surface of the converter cabinet is provided with a support plate (3), the capacitor (1) is fixed on the support plate (3), and the tail of the support plate (3) is fixed to the second structural beam (6) of the converter cabinet.

3. The capacitor assembly for a traction converter according to claim 2, characterized in that: The converter cabinet is provided with a first structural beam (5) at the front end. The upper fixing ear (11) has an installation hole, and a bolt is inserted in the installation hole to fix it to the first structural beam (5). The lower fixing ear (12) has an installation hole, and a bolt is inserted in the installation hole to fix it to the front end of the support plate (3).

4. The capacitor assembly for a traction converter according to claim 2, characterized in that: The support plate (3) is provided with a slide rail (4) for easy movement, and the capacitor (1) is installed in the slide rail (4).

5. The capacitor assembly for a traction converter according to claim 1, characterized in that: The limiting block (13) is a 3mm carbon steel plate, which is welded and fixed to the tail of the capacitor (1).

6. The capacitor assembly for a traction converter according to claim 2, characterized in that: The opening of the limiting card seat (2) is provided with a flared mouth (21) for easy insertion; the mounting surface (22) at the tail is provided with a mounting hole, and a bolt is inserted into the mounting hole to fix the limiting card seat (2) on the second structural beam (6).

7. The capacitor assembly for a traction converter according to claim 6, characterized in that: The limiting bracket (2) is made of 2mm stainless steel plate.

8. The capacitor assembly for a traction converter according to claim 2, characterized in that: The support plate (3) is made of carbon steel plate with a yield strength ≥355MPa.

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