Traction converter box sealing performance test tool and method

Abstract

The present invention provides a traction converter housing sealing performance test tool and method, the test tool includes a power module simulation assembly and a seal; the power module simulation assembly is detachably arranged inside the traction converter housing; 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 vent 2 matching the vent 1 of the traction converter housing; the seal is used to seal the gap between the vent 1 and the vent 2 at the same end and the traction converter housing. The test method includes installing the power module simulation assembly on a power module installation slide rail, pushing it into the traction converter housing, pressing the rear baffle against the air duct sealing strip, pressing the front baffle against the power door sealing strip, and sealing the traction converter housing before conducting the test. The present invention uses the power module simulation assembly to replace the power module for testing, which can avoid damage to the power module during the test and reduce the test cost.

Description

Technical Field

[0001] The present invention relates to the technical field of test equipment, and in particular to a test tool and method for the sealing performance of a traction converter box. Background Art

[0002] The traction inverter can convert the electric energy from the contact network into the electric energy required by the traction motor. The traction inverter is one of the key components of the urban rail train. The electric 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 for the sealing performance of the traction inverter box. Each traction inverter box needs to be tested for sealing performance after welding. Since the power module, an important component inside the traction inverter box, is heavy and expensive; if the power module needs to be disassembled and assembled for testing during each traction inverter box test, it is easy to damage the power module and the test cost is high.

[0003] If other substitute components are used for testing, if the substitute components themselves have leaks, it will affect the accuracy of the sealing performance test of the traction inverter box.

[0004] In summary, 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. Summary of the invention

[0005] The object 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 traction converter box sealing performance test.

[0006] To achieve the above-mentioned purpose, the present invention provides a traction inverter case sealing performance test tool, including a power module simulation assembly and a seal; the power module simulation assembly is detachably arranged inside the traction inverter case; 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 vent 2 matching the vent 1 of the traction inverter case; the seal is used to seal the gap between the vent 1 and the vent 2 at the same end and the traction inverter case.

[0007] Preferably, the power module simulation assembly includes an upper cover plate, a lower cover plate, a front baffle plate and a rear baffle plate; the lower cover plate includes an integrally formed bottom plate and side plates, and the side plates on both sides of the lower cover plate are connected to the upper cover plate; the front baffle plate and the rear baffle plate are respectively arranged on the front and rear sides of the upper cover plate, and the front baffle plate and the rear baffle plate are both connected to the bottom plate and the side plates of the lower cover plate; the front baffle plate and the rear baffle plate are both provided with ventilation holes 2.

[0008] Preferably, a sealing layer is provided at the connection between any two of the upper cover plate, the lower cover plate, the front baffle plate and the rear baffle plate.

[0009] Preferably, the seal includes an air duct sealing strip arranged between the rear baffle and the vent 1 of the traction converter box air duct, and also includes a power gate sealing strip arranged between the front baffle and the vent 1 of the traction converter box power gate.

[0010] Preferably, the left and right sides of the upper cover plate are arranged beyond the lower cover plate, and a plurality of mounting holes for connecting with the power module mounting rails of the traction converter box are provided on the plate body of the upper cover plate beyond the lower cover plate.

[0011] Preferably, the edge of the front baffle plate and the edge of the rear baffle plate are both arranged beyond the outer surfaces of the upper cover plate and the lower cover plate.

[0012] Preferably, a reinforcing rib is provided at the bottom of the lower cover plate.

[0013] Preferably, a second reinforcing rib is provided between the upper cover plate and the lower cover plate.

[0014] Preferably, the sealing member comprises a sealing cover plate for sealing the outer surface of the traction converter box.

[0015] The present invention also provides a method for testing the sealing performance of a traction converter box, which uses the above-mentioned traction converter box sealing performance testing tool, and comprises the following steps:

[0016] Step 1: Weld the upper cover, lower cover, front baffle and rear baffle of the power module simulation assembly; apply glue at the connection between any two;

[0017] Step 2: After connecting the power module simulation assembly to 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 tightly against the air duct sealing strip; then install the traction converter box power door so that the front baffle is pressed tightly against the power door sealing strip;

[0018] Step 3: Seal the traction converter box with a seal and reserve a negative pressure connection port;

[0019] Step 4: During the test, negative pressure is pumped into the sealed cavity inside the traction converter box through the negative pressure connection port. After reaching the set test data, the pressure is maintained to confirm whether the traction converter box meets the sealing performance requirements.

[0020] The application of the technical solution of the present invention has the following beneficial effects:

[0021] (1) In the present invention, a power module simulation assembly having the same size as the power module is provided to replace the power module, thereby preventing the power module from being damaged during the test and reducing the test cost. At the same time, the gap between the vent 1 and the vent 2 at the same end and the traction converter box are sealed by the sealing member, thereby improving the accuracy of the sealing performance test of the traction converter box.

[0022] (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 simulation assembly itself to avoid affecting the sealing performance test of the traction converter box.

[0023] (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 achieving simulation of power modules of different models.

[0024] (4) In the present invention, the cover plate and the baffle are connected by a method of a few-section welding plus spot welding. After welding is completed, glue is applied at the connection between any two of the upper cover plate, the lower cover plate, the front baffle plate and the rear baffle plate to form a sealant layer to ensure the appearance quality of the power module simulation assembly and its own sealing performance.

[0025] (5) In the present invention, a plurality of mounting holes for connecting with the power module mounting rails of the traction converter box are provided on the plate body of the upper cover plate that protrudes beyond the lower cover plate, so as to facilitate the disassembly and assembly between the power module simulation assembly and the traction converter box.

[0026] (6) In the present invention, the edges of the front baffle plate and the edges of the rear baffle plate are both set beyond the outer surfaces of the upper cover plate and the lower cover plate, so that steps are reserved in the length direction and the height direction of the cover plate, which can ensure the overlap quality between the cover plate and the baffle plate. At the same time, it is also convenient to perform gluing operations on the surrounding welds on the outer side of the cover plate, thereby ensuring the appearance quality and sealing performance of the power module simulation assembly.

[0027] (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; the reinforcing rib 1 is wrapped around corners to prevent scratches on operators.

[0028] (8) In the present invention, reinforcing ribs 2 are provided between the upper cover plate and the lower cover plate, which can ensure the firmness of the welding without deforming the cover plate, so that the ventilation cavity in the middle forms a space of a certain height between the upper cover plate and the lower cover plate, playing a role in supporting the cover plate to ensure the strength. When the sealing performance test of the traction inverter box is carried out, the upper cover plate and the lower cover plate will not produce abnormal noise due to the suction of the sealing cavity of the traction inverter box, and the height state of the ventilation port 2 is always maintained without displacement or misalignment.

[0029] (9) In the present invention, the 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, which reduces the total mass of the power module simulation assembly and facilitates operators to carry the power module simulation assembly for testing.

[0030] (10) In the present invention, a sealed cavity is formed between the traction converter housing and the power module simulation assembly by a sealing member, thereby ensuring the normal conduct of the sealing performance test of the traction converter housing.

[0031] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0033] Figure 1 is a structural schematic diagram of a traction converter box to be tested in an embodiment of the present application;

[0034] Figure 2 It is a schematic diagram of a traction converter box sealing performance test tool used in conjunction with a traction converter box in an embodiment of the present application;

[0035] Figure 3 This is an embodiment of the present application Figure 2 Axial view of the mid-power module simulation assembly;

[0036] Figure 4 This is an embodiment of the present application Figure 3 A top view of

[0037] Figure 5 This is an embodiment of the present application Figure 3 A front view of

[0038] Figure 6 This is an embodiment of the present application Figure 3 Bottom view of

[0039] Figure 7 It is a schematic diagram of the installation of the power module simulation assembly in the traction converter box of the embodiment of the present application;

[0040] Among them, 1. upper cover plate, 1.1. mounting hole, 2. lower cover plate, 2.1. bottom plate, 2.2. side plate, 2.3. reinforcing rib one, 3. front baffle plate, 3.1. vent two, 4. rear baffle plate, 5. air duct sealing strip, 6. power door sealing strip, 7. reinforcing rib two, 8. sealing cover plate, 8a. sealing cover plate one, 8b. sealing cover plate two, 8c. sealing cover plate three, 9. traction inverter box, 9.1. vent one, 9.2. mounting rail, 9.3. air duct partition plate, 9.4. power door. DETAILED DESCRIPTION

[0041] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims.

[0042] Example:

[0043] See also Figures 1 to 7 , a traction converter box sealing performance test tool and method, this embodiment is applied to the sealing performance test of the traction converter box 9 of the urban rail train.

[0044] A traction converter box sealing performance test tool, comprising a power module simulation assembly and a seal; the power module simulation assembly is detachably arranged inside the traction converter box 9; the size of the power module simulation assembly is the same as that of the power module (rectifier power module or inverter power module, etc.); both ends of the power module simulation assembly are provided with a vent second matching the vent first of the traction converter box 9; the seal is used to seal the gap between the vent first and the vent second at the same end and the traction converter box 9, such as Figure 1 and Figure 2 As shown ( Figure 2 The power gate 9.4 is not shown. When the sealing performance test of the traction inverter case 9 is carried out, since the power module is heavy and very expensive, in order to avoid damage to the power module, the present application places the power module simulation assembly into the traction inverter case 9 to simulate the 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 inverter case 9, and are provided with seals. At the same time, a seal is also provided on the outer surface of the traction inverter case 9, which is used to form a sealed cavity inside the traction inverter case 9, and only the ventilation cavity formed by the vents 1 and 2 can circulate air.

[0045] In this embodiment, a vent 1 9.1 is provided on the power gate 9.4, and a vent 2 3.1 matching the vent 1 9.1 is provided at the front end of the power module simulation assembly, so that an annular sealed cavity is formed between the inner wall of the traction inverter housing 9 and the power module simulation assembly.

[0046] See also Figure 3The power module simulation assembly includes 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 includes a bottom plate 2.1 and a side plate 2.2 integrally formed by a bending process, so that the side height of the main part of the sealing tool cavity is consistent, reducing the error and welding deformation caused by the lower cover plate 2 being manufactured by methods such as welding; the lower cover plate 2 that is bent as a whole is used as the main body, which is convenient for other components to be assembled with it, reducing assembly errors to improve the external dimensions and quality of the tooling itself; the side plates 2.2 on both sides of the lower cover plate 2 are connected to the upper cover plate 1; the front baffle plate 3 and the rear baffle plate 4 are respectively arranged on the front and rear sides of the upper cover plate 1, and the front baffle plate 3 and the rear baffle plate 4 are connected to the bottom plate 2.1 and the side plate 2.2 of the lower cover plate 2; the front baffle plate 3 and the rear baffle plate 4 are both provided with a vent 2 3.1, forming a cavity in which gas can only flow through the vent 2 3.2 on the front baffle plate 3 and the rear baffle plate 4.

[0047] See also Figure 4 and Figure 5 The overall dimensions C and D of the power module simulation assembly are determined by the dimensions of the power module, and can be manufactured according to the size of the selected power module, thereby realizing the simulation of power modules of different models; the dimensions A and B of the vent 2 3.1 are determined according to the dimensions of the vent 1 9.1 on the traction converter box 9, and the dimensional tolerance should be controlled within 0.5 mm.

[0048] In this embodiment, the cover plate and the baffle are connected by a method of a few-section welding and spot welding. After welding is completed, glue is applied at the connection between any two of the upper cover plate 1, the lower cover plate 2, the front baffle plate 3 and the rear baffle plate 4 to form a sealant layer to ensure the appearance quality of the power module simulation assembly and its own sealing performance.

[0049] See also Figure 4 The left and right sides of the upper cover plate 1 are arranged beyond the outer surface of the side plate 2.2 of the lower cover plate 2. A plurality of mounting holes 1.1 for connecting with the power module mounting rails 9.2 of the traction converter box 9 are provided on the plate body of the upper cover plate 1 beyond the lower cover plate 2, so as to facilitate the disassembly and assembly between the power module simulation assembly and the traction converter box 9.

[0050] The edges of the front baffle plate 3 and the rear baffle plate 4 are both arranged beyond the outer surfaces of the upper cover plate 1 and the lower cover plate 2. Figure 3As shown, in this embodiment, in the length direction, the front baffle 3 and the rear baffle 4 extend beyond the side plate 2.2 of the lower cover plate 2 by 3 mm; in the height direction, the front baffle 3 and the rear baffle 4 extend beyond the upper cover plate 1 by 4 mm, and the front baffle 3 and the rear baffle 4 extend beyond the lower cover plate 2 by 5 mm. Steps are reserved in both the length and height directions of the cover plate, which can ensure the overlap quality between the cover plate and the baffle plate, and also facilitate the gluing operation at the surrounding welds on the outer side of the cover plate, thereby ensuring the appearance quality and sealing performance of the power module simulation assembly.

[0051] The bottom of the lower cover plate 2 is provided with a reinforcing rib 2.3, which is connected to the bottom plate 2.1 of the lower cover plate 2 by plug welding to enhance the overall strength of the power module simulation assembly. The reinforcing rib 2.3 is surrounded by corners to prevent scratches on operators.

[0052] See also Figure 3 , a reinforcing rib 2 7 is provided between the upper cover plate 1 and the lower cover plate 2. When welding the reinforcing rib 2 7, a small circular hole is opened on the bottom plate 2.1 of the upper cover plate 1 and the lower cover plate 2, and then the connection between the reinforcing rib 2 7 and the upper cover plate 1 and the lower cover plate 2 is realized by plug welding. It can ensure the firmness of welding without deforming the cover plate, so that the ventilation cavity in the middle forms a space of a certain height between the upper cover plate 1 and the lower cover plate 2, which plays a role in supporting the cover plate to ensure the strength. After welding, the glue operation needs to be applied at the weld to avoid affecting the sealing performance of the cover plate. When conducting the sealing performance test of the traction converter box 9, the upper cover plate 1 and the lower cover plate 2 will not produce abnormal noise due to the suction of the sealing cavity of the traction converter box 9, and the height state of the vent 2 3.1 is always maintained without displacement or misalignment.

[0053] The power module simulation assembly is made of 2mm thick Q235B carbon steel, which makes the power module simulation assembly have sufficient rigidity; at the same time, the thin plate structure is light, which reduces the total mass of the power module simulation assembly and makes it convenient for operators to carry the power module simulation assembly for testing.

[0054] The corners of the cover and baffle are rounded to prevent the sharp corners of the power module simulation assembly from scratching the operator during the test. When applying glue at the weld or joint, use Terostat MS930 white glue to seal. Pay special attention to the weld interface to completely cover it. After the glue is dried for 24 hours, spray paint for protection.

[0055] See also Figure 7The sealing member includes an air duct sealing strip 5 provided between the rear baffle plate 4 and the vent 1 9.1 on the air duct partition plate 9.3 of the traction converter case 9, and the air duct sealing strip 5 surrounds the vent 2 3.1. The sealing member also includes a power gate sealing strip 6 provided between the front baffle plate 3 and the vent 1 9.1 of the power gate 9.4 of the traction converter case 9, and the power gate sealing strip 6 also surrounds the vent 2 3.1 on the front baffle plate 3, so as to seal the gap between the traction converter case 9 and the power module simulation assembly at the front and rear ends.

[0056] The sealing member comprises a sealing cover plate 8 for sealing the outer surface of the traction converter housing 9, see Figure 2 According to the different sizes of equipment installation ports on the traction converter box 9, sealing cover plate 1 8a, sealing cover plate 2 8b and sealing cover plate 3 8c are respectively provided, and the negative pressure connection port is set on the sealing cover plate 3 8c. Therefore, after the sealing cover plate 8 is set, it can be further sealed by tape, and the holes on the sealing cover plate 2 8b can also be sealed by tape.

[0057] The test method of the above-mentioned traction converter box sealing performance test tool is as follows:

[0058] Step 1: Weld the upper cover plate 1, the lower cover plate 2, the front baffle plate 3 and the rear baffle plate 4 of the power module simulation assembly; apply glue at the connection between any two to form a sealing glue layer;

[0059] Step 2: After the power module simulation assembly is connected to the power module installation slide rail in the traction converter box by bolts, the power module simulation assembly is pushed into the interior of the traction converter box 9, so that the rear baffle 4 is pressed tightly against the air duct sealing strip 5 of the air duct partition 9.3; then the power door 9.4 of the traction converter box 9 is installed, so that the front baffle 3 is pressed tightly against the power door sealing strip 6; observe whether the joints of the sealing strips of the air duct sealing strip 5 and the power door sealing strip 6 are well glued, and whether there are any damages or places where the strips are not pressed into place; the lock of the power door 9.4 should be adjusted and tightened to ensure that the power door 9.4 is well sealed;

[0060] Step 3: Seal the traction converter box 9 with a seal, and reserve a negative pressure connection port on one of the sealing cover plates 8;

[0061] Step 4: During the test, the negative pressure connection port is used to pump negative pressure into the sealed cavity inside the traction converter case 9, and the pressure is maintained after reaching the set test data to confirm whether the traction converter case 9 meets the sealing performance requirements. If the pressure maintenance time of the traction converter case 9 meets the test requirements, it proves that there is no leakage point on the traction converter case 9.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A traction converter box sealing performance test tool, characterized in that: It comprises a power module simulation assembly and a sealing member; the power module simulation assembly is detachably arranged inside a traction converter box; 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 vent 2 matching with a vent 1 of the traction converter box; the sealing member is used to seal the gap between the vent 1 and the vent 2 at the same end and the traction converter box; 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 an integrally formed bottom plate (2.1) and side plates (2.2), and the side plates (2.2) on both sides of the lower cover plate (2) are connected to the upper cover plate (1); the front baffle plate (3) and the rear baffle plate (4) are respectively arranged on the front and rear sides of the upper cover plate (1), and the front baffle plate (3) and the rear baffle plate (4) are both connected to the bottom plate (2.1) and the side plates (2.2) of the lower cover plate (2); the front baffle plate (3) and the rear baffle plate (4) are both provided with ventilation holes 2; The left and right sides of the upper cover plate (1) are arranged beyond the lower cover plate (2); a plurality of mounting holes (1.1) for connecting to the power module mounting rails of the traction converter box are provided on the plate body where the upper cover plate (1) exceeds the lower cover plate (2).

2. A traction converter box sealing performance test tool according to claim 1, characterized in that: A sealing adhesive layer is provided at the connection between any two of the upper cover plate (1), the lower cover plate (2), the front baffle plate (3) and the rear baffle plate (4).

3. A traction converter box sealing performance test tool according to claim 1 or 2, characterized in that: The sealing member comprises an air duct sealing strip (5) arranged between the rear baffle plate (4) and the first vent of the traction converter box air duct, and also comprises a power gate sealing strip (6) arranged between the front baffle plate (3) and the first vent of the traction converter box power gate.

4. A traction converter box sealing performance test tool according to claim 3, characterized in that: The edge of the front baffle plate (3) and the edge of the rear baffle plate (4) are both arranged beyond the outer surfaces of the upper cover plate (1) and the lower cover plate (2).

5. A traction converter box sealing performance test tool according to claim 3, characterized in that: A reinforcing rib (2.3) is provided at the bottom of the lower cover plate (2).

6. A traction converter box sealing performance test tool according to claim 3, characterized in that: A second reinforcing rib (7) is provided between the upper cover plate (1) and the lower cover plate (2).

7. A traction converter box sealing performance test tool according to claim 3, characterized in that: The sealing component comprises a sealing cover plate (8) for sealing the outer surface of the traction converter box body.

8. A method for testing the sealing performance of a traction converter housing, using the traction converter housing sealing performance testing tool as claimed in any one of claims 3 to 7, characterized in that: The following steps are involved: Step 1: Weld the upper cover plate (1), the lower cover plate (2), the front baffle plate (3) and the rear baffle plate (4) of the power module simulation assembly; and apply glue at the connection between any two of them; Step 2: After the power module simulation assembly is connected to the power module installation slide rail in the traction converter box, the power module simulation assembly is pushed into the traction converter box so that the rear baffle (4) is pressed tightly against the air duct sealing strip (5); then the traction converter box power door is installed so that the front baffle (3) is pressed tightly against the power door sealing strip (6); Step 3: Seal the traction converter box with a seal and reserve a negative pressure connection port; Step 4: During the test, negative pressure is pumped into the sealed cavity inside the traction converter box through the negative pressure connection port. After reaching the set test data, the pressure is maintained to confirm whether the traction converter box meets the sealing performance requirements.

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