CN115265961A - Traction converter box body sealing performance test tool and method - Google Patents

Abstract

The invention provides a traction converter box body sealing performance test tool and a method, wherein the test tool comprises a power module simulation assembly and a sealing piece; the power module simulation assembly is detachably arranged in the traction converter box; the size of the power module simulation assembly is the same as that of the power module; two ends of the power module simulation assembly are respectively provided with a second ventilation opening matched with the first ventilation opening of the traction converter box body; the sealing piece is used for sealing a gap between the first ventilation opening and the second ventilation opening at the same end and the traction converter box body. The test method comprises the steps that the power module simulation assembly is installed on the power module installation slide rail and pushed into the traction converter box body, the rear baffle is tightly pressed on the air duct sealing strip, the front baffle is tightly pressed on the power door sealing strip, and the traction converter box body is sealed and then tested. According to the invention, the power module simulation assembly is used for replacing the power module to carry out the test, so that the power module can be prevented from being damaged in the test process, and the test cost is reduced.

Description

A tool and method for testing the sealing performance of a traction converter box

technical field

The invention relates to the technical field of testing equipment, in particular to a tool and method for testing the sealing performance of a traction converter box.

Background technique

The traction converter can convert the electrical energy from the catenary into the electrical energy required by the traction motor. The traction converter is one of the key components of the urban rail train. The electrical energy it generates is uniform without fluctuations and interruptions. At present, most traction system solutions integrate components such as rectifier power modules and inverter power modules, which have high requirements on the sealing performance of the traction converter box. After the welding of each traction converter box is completed, the sealing performance test needs to be carried out. Because the power module, an important device inside the traction converter box, is heavy and expensive; if each traction converter box is tested The power module needs to be disassembled for the test, which is easy to cause damage to the power module, and the test cost is high.

If other substitute components are used for the test, if the substitute components themselves have leakage points, the accuracy of the sealing performance test of the traction converter box will be affected.

To sum up, there is an urgent need for a traction converter box sealing performance test tool and method to solve the problems existing in the prior art.

Contents of the invention

The purpose of the present invention is to provide a traction converter box sealing performance test tool and method to solve the problem of high cost of the traction converter box sealing performance test.

In order to achieve the above purpose, the present invention provides a traction converter box sealing performance test tool, including a power module simulation assembly and a seal; the power module simulation assembly is detachably arranged on the traction converter box Inside; the size of the power module simulation assembly is the same as that of the power module; both ends of the power module simulation assembly are provided with a ventilation port 2 matching the ventilation port 1 of the traction converter box; the seal It is used to seal the gap between the vent 1 and the vent 2 at the same end and the traction converter box.

Preferably, the power module simulation assembly includes an upper cover, a lower cover, a front baffle and a rear baffle; the lower cover includes an integrally formed bottom plate and side plates, and the side plates on both sides of the lower cover are It is connected with the upper cover; the front baffle and the rear baffle are respectively arranged on the front and rear sides of the upper cover, and both the front baffle and the rear baffle are connected with the bottom plate and the side panels of the lower cover; the front baffle There are two air vents on the fascia and tailgate.

Preferably, a sealant layer is provided at the junction of any two of the upper cover, the lower cover, the front baffle and the rear baffle.

Preferably, the sealing member includes an air duct sealing strip arranged between the rear baffle and the first air duct of the air duct of the traction converter box, and also includes a sealing strip arranged between the front baffle and the power door of the traction converter box The power door seal between the vent one.

Preferably, the left and right sides of the upper cover plate are set beyond the lower cover plate, and the body of the upper cover plate beyond the lower cover plate is provided with a plurality of mounting slide rails for connecting with the power module of the traction converter box. Mounting holes.

Preferably, both the edge of the front baffle and the edge of the rear baffle are set beyond the outer surfaces of the upper cover and the lower cover.

Preferably, a reinforcing rib is provided at the bottom of the lower cover.

Preferably, a reinforcing rib 2 is provided between the upper cover plate and the lower cover plate.

Preferably, the sealing member includes a sealing cover plate for sealing the outer surface of the traction converter case.

The present invention also provides a method for testing the sealing performance of the traction converter box, which adopts the above-mentioned tool for testing the sealing performance of the traction converter box, and includes the following steps:

Step 1: Weld the upper cover, lower cover, front baffle and rear baffle of the power module simulation assembly; apply glue at any connection between the two;

Step 2: After connecting the power module simulation assembly with the power module installation slide rail in the traction converter box, push the power module simulation assembly into the traction converter box so that the rear baffle is pressed against the air duct on the sealing strip; then install the power door of the traction converter box so that the front baffle is pressed against the sealing strip of the power door;

Step 3: Seal the traction converter box with a seal, and reserve a negative pressure connection port;

Step 4: During the test, perform negative pressure operation on the sealing chamber inside the traction converter box through the negative pressure connection port, and keep the pressure after reaching the set test data to confirm whether the traction converter box is Meet the sealing performance requirements.

Applying the technical solution of the present invention has the following beneficial effects:

(1) In the present invention, by setting a power module simulation assembly with the same size as the power module to replace the power module, the damage of the power module during the test can be avoided, and the test cost can be reduced; The gap between the first vent and the second vent and the traction converter box are sealed, which can improve the accuracy of the sealing performance test of the traction converter box.

(2) In the present invention, the lower cover plate includes a bottom plate and a side plate integrally formed by a bending process, which is used to reduce the assembly gap of the power module analog assembly itself, so as not to affect the sealing performance test of the traction converter box.

(3) In the present invention, the overall size of the power module simulation assembly is determined by the size of the power module, and can be manufactured according to the size of the selected power module, thereby realizing the simulation of different types of power modules.

(4) In the present invention, the cover plate and the baffle are connected by means of spot welding and spot welding. After the welding is completed, any two Glue is applied to the joints of the two to form a sealant layer to ensure the appearance quality of the power module analog assembly and its own sealing performance.

(5) In the present invention, a plurality of installation holes for connecting with the power module installation slide rails of the traction converter box are provided on the plate body where the upper cover plate exceeds the lower cover plate, so as to facilitate the realization of power module simulation assembly and Disassembly and assembly between traction converter boxes.

(6) In the present invention, the edge of the front baffle and the edge of the rear baffle are set beyond the outer surfaces of the upper cover and the lower cover, so that steps are reserved in the length direction and height direction of the cover plate, which can ensure that the cover plate The lapping quality between the cover plate and the baffle plate is also convenient for gluing operation on the surrounding welds on the outside of the cover plate to ensure the appearance quality and sealing performance of the power module simulation assembly.

(7) In the present invention, a reinforcing rib 1 is provided at the bottom of the lower cover plate to enhance the overall strength of the power module simulation assembly; corners are wrapped around the reinforcing rib 1 to prevent scratches on the operator.

(8) In the present invention, a reinforcing rib 2 is provided between the upper cover plate and the lower cover plate, which can ensure the firmness of the welding and will not deform the cover plate, so that the ventilation cavity in the middle is located between the upper cover plate and the lower cover plate. A space of a certain height is formed between them, which plays the role of supporting the cover to ensure the strength. When the sealing performance test of the traction converter box is carried out, the upper cover and the lower cover will not be affected by the sealing of the traction converter box. The cavity is sucked to produce abnormal noise, and the height state of the second vent is always maintained without displacement or misalignment.

(9) In the present invention, the whole power module simulation assembly is made of Q235B carbon steel with a thickness of 2 mm, so that the power module simulation assembly has sufficient rigidity; at the same time, the thin plate structure is light and handy, which reduces the total mass of the power module simulation assembly , which is convenient for the operator to carry the power module simulation assembly for testing.

(10) In the present invention, a sealing cavity is formed between the traction converter case and the power module simulation assembly through the sealing member, so as to ensure the normal performance test of the traction converter case sealing performance.

In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages. Hereinafter, the present invention will be described in further detail with reference to the drawings.

Description of drawings

The accompanying drawings constituting a part of this application are used to provide further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention. In the attached picture:

Fig. 1 is the structural representation of the traction converter case to be tested in the embodiment of the present application;

Fig. 2 is a schematic diagram of a traction converter box sealing performance test tool used in cooperation with the traction converter box in the embodiment of the present application;

Fig. 3 is an axial view of the power module simulation assembly in Fig. 2 of the embodiment of the present application;

Fig. 4 is the top view of Fig. 3 of the embodiment of the present application;

Fig. 5 is the front view of Fig. 3 of the embodiment of the present application;

Fig. 6 is the bottom view of Fig. 3 of the embodiment of the present application;

Fig. 7 is a schematic diagram of the installation of the power module simulation assembly in the traction converter box according to the embodiment of the present application;

Among them, 1. Upper cover plate, 1.1. Mounting hole, 2. Lower cover plate, 2.1. Bottom plate, 2.2. Side plate, 2.3. Rib 1, 3. Front baffle, 3.1, Vent 2, 4. Rear baffle Plate, 5. Air duct sealing strip, 6. Power door sealing strip, 7. Reinforcing rib 2, 8. Sealing cover plate, 8a, Sealing cover plate 1, 8b, Sealing cover plate 2, 8c, Sealing cover plate 3, 9 , Traction converter box, 9.1, vent one, 9.2, installation slide rail, 9.3, air duct partition, 9.4, power door.

Detailed ways

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in various ways defined and covered by the claims.

Example:

Referring to FIG. 1 to FIG. 7 , a tool and method for testing the sealing performance of a traction converter box, this embodiment is applied to the sealing performance test of the traction converter box 9 of an urban rail train.

A tool for testing the sealing performance of a traction converter box, including a power module simulation assembly and a seal; the power module simulation assembly is detachably arranged inside the traction converter box 9; the power module simulation assembly The finished size is the same as that of the power module (rectifier power module or inverter power module, etc.); both ends of the simulation assembly of the power module are provided with vents 2 matching the vents 1 of the traction converter box 9; The seal is used to seal the gap between the first vent and the second vent at the same end and the traction converter case 9, as shown in Figures 1 and 2 (the power door 9.4 is not shown in Figure 2). When carrying out the sealing performance test of the traction converter box 9, since the power module has a large mass and is very expensive, in order to avoid damage to the power module, this application puts the power module simulation assembly inside the traction converter box 9 to simulate Power module; the front and rear end faces of the power module simulation assembly are pressed against the front and rear end faces of the traction converter box 9, and seals are provided, and seals are also provided on the outer surface of the traction converter box 9, for use Since a sealed cavity is formed inside the traction converter box body 9, only the ventilation cavity formed by the first vent hole and the second vent hole can carry out air circulation.

In this embodiment, the power door 9.4 is provided with a vent one 9.1, and the front end of the power module simulation assembly is provided with a vent two 3.1 matching the vent one 9.1, so that the inner wall of the traction converter box 9 and the power An annular sealed cavity is formed between the module simulation assemblies.

Referring to Fig. 3, the power module simulation assembly includes an upper cover 1, a lower cover 2, a front baffle 3 and a rear baffle 4; the lower cover 2 includes a bottom plate 2.1 integrally formed by a bending process and a side plate 2.2, so that the side height of the main part of the sealed tooling cavity is consistent, reducing the error and welding deformation of the lower cover plate 2 due to manufacturing such as tailor welding; in addition, the bent lower cover plate 2 is used as the main body, which is convenient Other components are assembled with it to reduce assembly errors to improve the overall size and quality of the tooling itself; the side panels 2.2 on both sides of the lower cover 2 are connected to the upper cover 1; the front baffle 3 and the rear baffle 4 are respectively It is arranged on the front and back sides of the upper cover plate 1, and the front baffle plate 3 and the rear baffle plate 4 are connected with the bottom plate 2.1 and the side plate 2.2 of the lower cover plate 2; Vent two 3.1 are arranged, form a cavity that gas can only flow through the vent two 3.2 on the front baffle 3 and the rear baffle 4.

Referring to Figure 4 and Figure 5, the overall dimensions C and D of the power module simulation assembly are determined by the size of the power module, and can be manufactured according to the size of the selected power module, so as to realize the simulation of different types of power modules; ventilation Dimensions A and B of port 2 3.1 are determined according to the size of vent 1 9.1 on the traction converter box 9, and the dimensional tolerance should be controlled within 0.5mm.

In this embodiment, the cover plate and the baffle plate are connected by a few-section welding plus spot welding. After the welding is completed, a The joints of any two of them are glued to form a sealant layer to ensure the appearance quality of the power module analog assembly and its own sealing performance.

Referring to Fig. 4, the left and right sides of the upper cover plate 1 are set beyond the outer surface of the side plate 2.2 of the lower cover plate 2, and the upper cover plate 1 beyond the lower cover plate 2 is provided with a plurality of The installation hole 1.1 connected to the power module installation slide rail 9.2 of the converter box 9 facilitates the disassembly and assembly between the power module simulation assembly and the traction converter box 9.

The edge of the front baffle 3 and the edge of the back baffle 4 are set beyond the outer surface of the upper cover 1 and the lower cover 2, as shown in Figure 3, in this embodiment, in the length direction, the front baffle 3 and the rear baffle 4 have a length of 3mm beyond the side plate 2.2 of the lower cover 2; in the height direction, the distance between the front baffle 3 and the rear baffle 4 beyond the upper cover 1 is 4mm, and the front baffle 3 and the rear The distance between the baffle plate 4 and the lower cover plate 2 is 5mm. Steps are reserved in the length direction and height direction of the cover plate, which can ensure the quality of the lap joint between the cover plate and the baffle plate, and at the same time facilitate the glueing operation on the four-section welds on the outer side of the cover plate, ensuring that the power module simulation overall Complete appearance quality and sealing performance.

The bottom of the lower cover 2 is provided with a reinforcement rib 2.3, and the connection between the reinforcement rib 2.3 and the bottom plate 2.1 of the lower cover 2 is connected by plug welding, which is used to enhance the overall strength of the power module simulation assembly. Wrap the corners around the reinforcing rib 1 2.3 to prevent scratches on the operator.

Referring to Fig. 3, a reinforcing rib 2 7 is provided between the upper cover 1 and the lower cover 2, when the reinforcing rib 2 7 is welded, a small round hole is opened on the bottom plate 2.1 of the upper cover 1 and the lower cover 2, The connection between the reinforcement rib 2 7 and the upper cover plate 1 and the lower cover plate 2 is realized by means of plug welding. It can not only ensure the firmness of welding but also not deform the cover plate, so that the ventilation cavity in the middle can form a space of a certain height between the upper cover plate 1 and the lower cover plate 2, and play the role of supporting the cover plate to ensure the strength. After welding Glue is required at the weld to avoid affecting the sealing performance of the cover. When carrying out the sealing performance test of the traction converter box 9, the upper cover 1 and the lower cover 2 will not produce abnormal noise due to the suction of the sealing cavity of the traction converter box 9, and the ventilation opening 2 will always be kept. The height state of 3.1 does not move or dislocate.

The whole power module simulation assembly is made of Q235B carbon steel with a thickness of 2mm, so that the power module simulation assembly has sufficient rigidity; at the same time, the thin plate structure is light and handy, which reduces the total mass of the power module simulation assembly and facilitates the operator to carry the power module Simulate the assembly for testing.

The surroundings of the cover plate and the baffle are rounded to avoid scratching the operator by the sharp corners of the power module simulation assembly during the test. When gluing at the welding seam or joint, use Terostat MS930 white glue to glue and seal. Pay special attention to the position of the interface with the welding seam to completely cover it. After the glue is dry for 24 hours, spray paint for protection.

Referring to Fig. 7, the sealing member includes an air duct sealing strip 5 arranged between the tailgate 4 and the air duct first 9.1 on the air duct partition plate 9.3 of the traction converter box 9, and the air duct sealing strip 5 surrounds Ventilation port 2 3.1 circle, also includes power door sealing strip 6 arranged between front baffle 3 and power door 9.4 of traction converter box 9 and vent 1 9.1, power door sealing strip 6 also surrounds the front baffle The air vent 2 3.1 on the 3 is rounded to realize the sealing of the gap between the traction converter box 9 and the power module simulation assembly at the front and rear ends.

The sealing member includes a sealing cover plate 8 for sealing the outer surface of the traction converter box 9. Referring to FIG. Plate 1 8a, sealing cover 2 8b and sealing cover 3 8c, the negative pressure connection port is set on the sealing cover 3 8c, so after the sealing cover 8 is set, it can be further sealed by adhesive tape, sealing the cover The holes on the two 8b can also be sealed by tape.

The test method of the above-mentioned traction converter box sealing performance test tool is as follows:

Step 1: Weld the upper cover plate 1, lower cover plate 2, front baffle plate 3 and rear baffle plate 4 of the power module simulation assembly; apply glue at any joint between the two to form a sealant layer;

Step 2: After connecting the power module simulation assembly with the power module installation slide rail in the traction converter box through bolts, push the power module simulation assembly into the traction converter box 9, so that the rear baffle 4 Press it tightly on the air duct sealing strip 5 of the air duct partition 9.3; then install the power door 9.4 of the traction converter box 9 so that the front baffle 3 is pressed tightly on the power door sealing strip 6; observe the air duct sealing strip 5 and power door sealing strip 6, whether the joint of the sealing strip is glued well, and whether the installation of the strip is damaged or not pressed in place; the lock of the power door 9.4 should be adjusted and the tightening torque is good to ensure the power Good sealing of door 9.4;

Step 3: Seal the traction converter box 9 through a seal, and reserve a negative pressure connection port on one of the sealing cover plates 8;

Step 4: During the test, perform a negative pressure operation on the sealing cavity inside the traction converter box 9 through the negative pressure connection port, and maintain the pressure after reaching the set test data, and confirm that the traction converter box 9 Whether it meets the sealing performance requirements. If the holding time of the traction converter box 9 meets the test requirements, it proves that there is no leakage point on the traction converter box 9 .

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. A traction converter box body sealing performance test tool is characterized by comprising a power module simulation assembly and a sealing piece; the power module simulation assembly is detachably arranged in the traction converter box; the size of the power module simulation assembly is the same as that of the power module; two ends of the power module simulation assembly are provided with a second ventilation opening matched with the first ventilation opening of the traction converter box body; the sealing piece is used for sealing a gap between the first ventilation opening and the second ventilation opening at the same end and the traction converter box body.

2. The traction converter box body sealing performance test tool according to claim 1, wherein the power module simulation assembly comprises an upper cover plate (1), a lower cover plate (2), a front baffle plate (3) and a rear baffle plate (4); the lower cover plate (2) comprises a bottom plate (2.1) and side plates (2.2) which are integrally formed, and the side plates (2.2) on two sides of the lower cover plate (2) are connected with the upper cover plate (1); the front baffle (3) and the rear baffle (4) are respectively arranged on the front side and the rear side of the upper cover plate (1), and the front baffle (3) and the rear baffle (4) are both connected with the bottom plate (2.1) and the side plate (2.2) of the lower cover plate (2); and the front baffle (3) and the rear baffle (4) are both provided with a second ventilation opening.

3. The tool for testing the sealing performance of the traction converter box body according to claim 2, wherein a sealing adhesive layer is arranged at the joint of any two of the upper cover plate (1), the lower cover plate (2), the front baffle plate (3) and the rear baffle plate (4).

4. The tool for testing the sealing performance of the traction converter box body according to claim 2 or 3, wherein the sealing element comprises an air duct sealing strip (5) arranged between the rear baffle plate (4) and the first ventilation opening of the traction converter box body air duct, and further comprises a power door sealing strip (6) arranged between the front baffle plate (3) and the first ventilation opening of the traction converter box body power door.

5. The tool for testing the sealing performance of the traction converter box body according to claim 4, wherein the left side and the right side of the upper cover plate (1) exceed the lower cover plate (2), and a plurality of mounting holes (1.1) used for being connected with a power module mounting sliding rail of the traction converter box body are formed in a plate body of the upper cover plate (1) exceeding the lower cover plate (2).

6. The traction converter box body sealing performance test tool according to claim 4, wherein the edge of the front baffle (3) and the edge of the rear baffle (4) both exceed the outer surfaces of the upper cover plate (1) and the lower cover plate (2).

7. The tool for testing the sealing performance of the traction converter box body according to claim 4, wherein a first reinforcing rib (2.3) is arranged at the bottom of the lower cover plate (2).

8. The tool for testing the sealing performance of the traction converter box body according to claim 4, wherein a second reinforcing rib (7) is arranged between the upper cover plate (1) and the lower cover plate (2).

9. The tool for testing the sealing performance of the traction converter box body as claimed in claim 4, wherein the sealing element comprises a sealing cover plate (8) for sealing the outer surface of the traction converter box body.

10. A method for testing the sealing performance of a traction converter box body adopts the tool for testing the sealing performance of the traction converter box body as claimed in any one of claims 4 to 9, and is characterized by comprising the following steps of:

the method comprises the following steps: welding an upper cover plate (1), a lower cover plate (2), a front baffle plate (3) and a rear baffle plate (4) of the power module simulation assembly; gluing the joint of any two components;

step two: after the power module simulation assembly is connected with a power module installation slide rail in a traction converter box body, the power module simulation assembly is pushed into the traction converter box body, so that a rear baffle (4) is pressed on an air duct sealing strip (5); then a power door of a traction converter box body is installed, so that the front baffle (3) is tightly pressed on a power door sealing strip (6);

step three: sealing the traction converter box body through a sealing element, and reserving a negative pressure connector;

step four: in the test process, the negative pressure is extracted from the sealing cavity in the traction converter box body through the negative pressure connecting port, the pressure is maintained after the set test data is achieved, and whether the traction converter box body meets the requirement of sealing performance is determined.

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