CN204905038U

CN204905038U - Power capacitor case shell structure

Info

Publication number: CN204905038U
Application number: CN201520415796.7U
Authority: CN
Inventors: 崔光军
Original assignee: China XD Electric Co Ltd
Current assignee: Xi'an Xidian power capacitor Co., Ltd.; China XD Electric Co Ltd
Priority date: 2015-06-16
Filing date: 2015-06-16
Publication date: 2015-12-23
Anticipated expiration: 2025-06-16

Abstract

The utility model discloses a power capacitor case shell structure, case bottom portion be by the protruding or sunken strengthening rib that forms, the strengthening rib includes the rectangle strengthening rib at the case bottom portion that follows edge and distributes is following the central rhombus strengthening rib of case bottom portion, the rectangle strengthening rib forms by case bottom portion is outside protruding, caves in to the case shell is inside gradually from the rectangle strengthening rib to the case bottom portion the rhombus strengthening rib, and the central region that case bottom portion is centered on by the rhombus strengthening rib is less than the principal plane of case bottom, the rhombus strengthening rib is by case bottom portion to inside sunken formation of case shell, having changed end central authorities' strengthening rib distribution direction, having made the rhombus into by former width direction the end of along and distribute, the new construction can play the enhancement effect of compromising two directions of length and width, has improved the ability of end primary structure along the counter -bending deformation of length direction.

Description

A kind of power capacitor box shell structure

Technical field

The utility model belongs to power capacitor field, is specifically related to a kind of power capacitor box shell structure.

Background technology

General thickness at the bottom of power capacitor box shell is the thin plate of 1.5mm, because being subject to welded stress effect during welding, the end of different size specification, all can produce welding deformation amount in various degree, therefore the end, can adopt some outwards to form the reinforcing rib structure of boss, to reach the object reducing welding deformation amount in the course of processing.

The deflection that the end of different size specification produces because of welding is different, and along with the change of sweating heat throughput rate, one species reinforcement cannot meet the requirement of welding deformation amount of all ends, if Fig. 1 a is front view at the bottom of existing power capacitor box shell case; Fig. 1 b is that the A-A of Fig. 1 a is to cutaway view; Fig. 1 c is that the B-B of Fig. 1 a is to cutaway view; Existing projective table type reinforcing rib structure, still well cannot play the problem reducing welding deformation, the power capacitor box shell of production, occurs often because deformation of bottom does not reach required standard.

Utility model content

The utility model object is to overcome the deficiencies in the prior art, provides a kind of power capacitor box shell structure, by the improvement to reinforcement at the bottom of case shell, reaches the effect reducing welding deformation amount.

For achieving the above object, the utility model by the following technical solutions:

A kind of power capacitor box shell structure, forms reinforcement by raised or sunken bottom case shell, and described reinforcement comprises rectangular ribs along case shell bottom margin and the rhombus reinforcement that is distributed in along case shell bottom center; Described rectangular ribs is formed by outwardly convex bottom case shell, gradually to case shell inner recess bottom the case shell from rectangular ribs to rhombus reinforcement, bottom case shell by rhombus reinforcement around middle section lower than the primary flat at the bottom of case shell; Described rhombus reinforcement is formed to case shell inner recess by bottom case shell.

Further, described rhombus reinforcement is connected by the second reinforcement formed to case shell inner recess with between rectangular ribs.

Further, described reinforcement width is 20mm.

Further, described by rhombus reinforcement around middle section lower than the primary flat 2mm at the bottom of case shell.

The utility model has the following advantages compared with original structure:

Change central authorities reinforced bag sand well direction, the end, make rhombus into by the former Width end of along and distribute, new construction can play the stiffening effect taking into account length and width both direction, improves the ability of end original structure counter-bending distortion along its length.

Further, increase reinforcement cross-sectional area, width is increased to 20mm by 12mm, and simultaneously because end central part reinforcement shape makes rhombus into by straight line, it is before improving 2 times that reinforcement accounts for floor space, improves rigidity and the anti-deformation ability at the end.

Further, make end central authorities' diamond-shaped area lower than the primary flat 2mm at the end, change the concave and convex direction of this position reinforcement simultaneously, concaved by reinforcement convex instead, the end can be improved by stress distribution situation after heat effect.

Accompanying drawing explanation

Fig. 1 a is front view at the bottom of existing power capacitor box shell case; Fig. 1 b is that the A-A of Fig. 1 a is to cutaway view; Fig. 1 c is that the B-B of Fig. 1 a is to cutaway view;

Fig. 2 a is front view at the bottom of the utility model power capacitor box shell case; Fig. 2 b is that the A-A of Fig. 2 a is to cutaway view; Fig. 2 c is that the B-B of Fig. 2 a is to cutaway view.

Embodiment

Below in conjunction with accompanying drawing, the utility model is further described.

If Fig. 2 a is front view at the bottom of the utility model power capacitor box shell case; Fig. 2 b is that the A-A of Fig. 2 a is to cutaway view; Fig. 2 c is that the B-B of Fig. 2 a is to cutaway view.

Power capacitor box shell structure of the present utility model, forms reinforcement by raised or sunken bottom case shell, and described reinforcement comprises rectangular ribs 1 along case shell bottom margin and the rhombus reinforcement 2 that is distributed in along case shell bottom center; Described rectangular ribs 1 is formed by outwardly convex bottom case shell, gradually to case shell inner recess bottom the case shell from rectangular ribs 1 to rhombus reinforcement 2, bottom case shell by rhombus reinforcement 2 around middle section 3 lower than the primary flat at the bottom of case shell; Described rhombus reinforcement 2 is formed to case shell inner recess by bottom case shell.

Reinforcement of the present utility model concaves and forms the primary flat of primary deformable face (middle diamond-shaped area) end of lower than, next enables reinforcing rib structure play to take into account the effect along end length and width both direction distributed effect, increase reinforcing rib structure sectional dimension simultaneously, add bottom structure integral rigidity.

Further, described rhombus reinforcement 2 is connected by the second reinforcement 4 formed to case shell inner recess with between rectangular ribs 1.

Further, described reinforcement width is 20mm.

Further, described by rhombus reinforcement 2 around middle section 3 lower than the primary flat 2mm at the bottom of case shell, see Fig. 2 b.

From mechanical theory analysis, in basal cross section, certainly exist a neutral axis (being formed continuously by the position do not deformed), the position of neutral axis and first moment of area (in cross section, local unit dimension and this area are to the product integral of neutral axis distance) are relevant.The dimension of area moment is mm ³, that is its value can just can be born, and positive and negatively depends on which side that cross section is positioned at neutral axis, and the size of whole first moment of area equals the algebraical sum of each first moment of area of neutral axis both sides.If certain first moment of area is larger, then the stress that produces under stressed effect of section edges is larger, and deflection is also larger.

As Fig. 1 a, the reinforcement of original structure is all positioned at the same side, is equivalent to neutral axis and is obviously partial to reinforcement side, once create thermal stress in welding process will be distributed in side, cause distortion also can be obviously amesiality, one of reason that after the welding of Here it is original structure, deflection is large.

Central part is placed under the primary flat at the end by the utility model, reinforcement convex is concaved instead simultaneously, these measures all can reduce the area moment in whole cross section, neutral axis can be positioned at the geometric center in cross section substantially, once stressed, the distortion of the both direction that stress distribution produces in neutral axis both sides can be offset to some extent, and deflection also can reduce.

Claims

1. a power capacitor box shell structure, it is characterized in that: form reinforcement by raised or sunken bottom case shell, described reinforcement comprises rectangular ribs (1) along case shell bottom margin and the rhombus reinforcement (2) that is distributed in along case shell bottom center; Described rectangular ribs (1) is formed by outwardly convex bottom case shell, gradually to case shell inner recess bottom case shell from rectangular ribs (1) to rhombus reinforcement (2), bottom case shell by rhombus reinforcement (2) around middle section (3) lower than the primary flat at the bottom of case shell; Described rhombus reinforcement (2) is formed to case shell inner recess by bottom case shell.

2. power capacitor box shell structure according to claim 1, is characterized in that: described rhombus reinforcement (2) is connected by the second reinforcement (4) formed to case shell inner recess with between rectangular ribs (1).

3. power capacitor box shell structure according to claim 1, is characterized in that: described reinforcement width is 20mm.

4. power capacitor box shell structure according to claim 1, is characterized in that: described by rhombus reinforcement (2) around middle section (3) lower than the primary flat 2mm at the bottom of case shell.