Air tightness leak detection device

Abstract

The utility model discloses an air tightness leak detection device which is applied to a liquid cooling motor casing, the inner side of the liquid cooling motor casing is provided with a through inner cavity, and at least one end of the liquid cooling motor casing is provided with a threaded hole; the air tightness leak detection device comprises a bottom plate and a sealing plate which are connected with the rack, and a sealing plate lifting mechanism is arranged between the sealing plate and the rack; the liquid-cooled motor shell is arranged between the bottom plate and the sealing plate, the threaded hole and the inner cavity are respectively communicated with the threaded hole detection channel and the inner cavity detection channel, and the threaded hole detection channel and the inner cavity detection channel are arranged on the bottom plate and / or the sealing plate; the air tightness leak hunting device comprises an air tightness detector. According to the utility model, independent air tightness detection can be respectively carried out on the inner cavity and the threaded hole of the liquid-cooled motor shell, and compared with the existing detection mode, the position of an air tightness defect can be identified, so that the defect is improved, the liquid-cooled motor shell with the air tightness defect is intercepted from flowing out, loss and complaint caused by scrapping of the whole machine are avoided, and the working efficiency is improved. And the air tightness detection accuracy is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air tightness detection, in particular to an air tightness leakage detection device. Background Art

[0002] Figure 1 The workpiece is a liquid-cooled motor housing of a new energy engine. After the liquid-cooled motor housing 100 is die-cast, its inner cavity 100a and the upper threaded holes 100b and the lower threaded holes 100c at both end faces need to be tested for air tightness; if the upper threaded hole 100b or the lower threaded hole 100c is defective and causes leakage, water will penetrate through the upper threaded hole 100b or the lower threaded hole 100c and burn the motor;

[0003] However, the airtightness testing device in the prior art is an integrated sealing structure, which only detects the inner cavity of the motor housing and cannot test the airtightness of the upper threaded holes and the lower threaded holes separately. Therefore, it is impossible to identify liquid-cooled motor housings with leaks caused by defects in the threaded holes, which will flow out to the customer's end, causing the entire machine assembly to be scrapped, resulting in serious quality claims.

[0004] Therefore, it is necessary to develop an airtight leak detection device that can perform independent airtightness detection on the inner cavity and threaded holes of the liquid-cooled motor casing. Compared with the existing detection method, it can identify the location of the airtightness defect, thereby improving the defect, and intercepting the outflow of the liquid-cooled motor casing with airtightness defects, avoiding losses and complaints caused by the scrapping of the entire machine, and improving the accuracy of airtightness detection. Utility Model Content

[0005] In order to solve the above problems, the technical solutions adopted by the utility model are as follows:

[0006] An airtightness leak detection device, characterized in that it is applied to a liquid-cooled motor casing (100), a through inner cavity (100a) is provided on the inner side of the liquid-cooled motor casing (100), and a threaded hole is provided on at least one end of the liquid-cooled motor casing (100);

[0007] The airtightness leak detection device comprises a bottom plate (81) and a sealing plate (82) connected to the frame (2), and a sealing plate lifting mechanism (83) is provided between the sealing plate (82) and the frame (2);

[0008] The liquid-cooled motor housing (100) is arranged between the bottom plate (81) and the sealing plate (82); the threaded hole and the inner cavity (100a) are respectively connected to the threaded hole detection channel and the inner cavity detection channel (12); and the threaded hole detection channel and the inner cavity detection channel (12) are arranged on the bottom plate (81) and / or the sealing plate (82);

[0009] The airtightness leak detection device comprises an airtightness detector (84), and the airtightness detector (84) is connected to the threaded hole detection channel and the inner cavity detection channel (12).

[0010] In this embodiment, the air tightness detector 84 is used to perform independent air tightness detection on the inner cavity 100a and the threaded holes of the liquid-cooled motor housing 100 .

[0011] Preferably, the threaded hole detection channel includes a plurality of threaded hole air inlet paths, and the inner cavity detection channel (12) includes one or more inner cavity air inlet paths (12b);

[0012] The threaded hole air inlet path is provided with a threaded hole air inlet hole and a threaded hole air outlet hole, and the threaded hole air outlet hole is connected to the threaded hole; the inner cavity air inlet path (12b) is provided with an inner cavity air inlet hole (12c) and an inner cavity air outlet hole (12a), and the inner cavity air outlet hole (12a) is connected to the inner cavity (100a);

[0013] The threaded hole air inlet and the inner cavity air inlet (12c) are connected to an air tightness detector (84).

[0014] Preferably, a plurality of the threaded hole air inlet paths are connected in series, wherein one of the threaded hole air inlet holes is connected to the air tightness detector (84); a plurality of the inner cavity air inlet paths (12b) are connected in series, wherein one of the inner cavity air inlet holes (12c) is connected to the air tightness detector (84);

[0015] The other plurality of threaded hole air inlet holes and the inner cavity air inlet hole (12c) are respectively blocked by blocking members.

[0016] Preferably, an upper annular sealing groove (32) is provided at the connection between the sealing plate (82) and the liquid-cooled motor housing (100), a lower annular sealing groove (13) is provided at the connection between the bottom plate (81) and the liquid-cooled motor housing (100), and the threaded hole air outlet is provided on the upper annular sealing groove (32) and / or the lower annular sealing groove (13).

[0017] Preferably, sealing gaskets (5) are provided in the upper annular sealing groove (32) and the lower annular sealing groove (13).

[0018] Preferably, the sealing plate lifting mechanism (83) comprises a lifting driver (831), wherein the lifting driver (831) is located above the sealing plate, the lifting driver (831) is connected to the frame, and a driving end thereof is connected to the sealing plate (82).

[0019] Preferably, the sealing plate lifting mechanism (83) further comprises a buffer component (832), and two ends of the buffer component (832) are respectively connected to the frame (2) and the sealing plate (82).

[0020] Preferably, positioning components (7) are arranged around the liquid-cooled motor casing (100); the positioning components (7) are used to position the liquid-cooled motor casing (100) for loading.

[0021] Preferably, a blocking component (9) is provided around the liquid-cooled motor housing (100), and the blocking component (9) is used to block the wiring harness hole on the side of the liquid-cooled motor housing (100).

[0022] Preferably, fillers (6) for filling the inner cavity (100a) are respectively provided at positions of the sealing plate (82) and the bottom plate (81) corresponding to the inner cavity (100a).

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] 1. The utility model can perform independent air tightness tests on the inner cavity and threaded holes of the liquid-cooled motor casing. Compared with the existing detection methods, it can identify the location of air tightness defects, thereby improving the defects and intercepting the outflow of liquid-cooled motor casings with air tightness defects, avoiding losses and complaints caused by the scrapping of the entire machine, and improving the accuracy of air tightness detection.

[0025] 2. Multiple air inlet paths on the bottom plate are connected in series, and multiple air inlet paths on the sealing plate are connected in series, so that the connection efficiency of air tightness detection is high and the manufacturing cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the liquid-cooled motor housing in the utility model;

[0027] Figure 2 It is a three-dimensional structural schematic diagram of the utility model;

[0028] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model;

[0029] Figure 4 This is a schematic diagram of the structure of the sealing plate in the utility model;

[0030] Figure 5 This is a schematic diagram of the structure of the bottom plate of the utility model;

[0031] Figure 6 This is a schematic diagram of the connection between the air tightness detector and the bottom plate and the sealing plate in the utility model;

[0032] Among them: frame 2, sealing gasket 5, filler 6, positioning assembly 7, blocking assembly 9, second detection channel 11, inner cavity detection channel 12, lower annular sealing groove 13, first detection channel 31, upper annular sealing groove 32, bottom plate 81, sealing plate 82, sealing plate lifting mechanism 83, air tightness detector 84, liquid-cooled motor housing 100, lifting driver 831, buffer assembly 832, second air outlet 11a, second air inlet path 11b, second air inlet 11c, inner cavity air outlet 12a, inner cavity air inlet path 12b, inner cavity air inlet 12c, first air outlet 31a, first air inlet path 31b, first air inlet 31c, inner cavity 100a, upper end threaded hole 100b, lower end threaded hole 100c. DETAILED DESCRIPTION

[0033] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the accompanying drawings. The accompanying drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0034] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be an element centered thereon. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an element centered thereon at the same time. The terms "vertical", "horizontal", "left", "right", "up", "down", "front", "rear" and similar expressions used herein are for illustrative purposes only.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0036] Below, in conjunction with the accompanying drawings and specific implementation methods, the utility model is further described:

[0037] like Figure 1-6 As shown, an airtightness leak detection device is applied to a liquid-cooled motor housing 100, wherein a through inner cavity 100a is provided on the inner side of the liquid-cooled motor housing 100, and a threaded hole is provided on at least one end of the liquid-cooled motor housing 100;

[0038] The airtightness leak detection device comprises a bottom plate 81 and a sealing plate 82 connected to the frame 2, and a sealing plate lifting mechanism 83 is provided between the sealing plate 82 and the frame 2;

[0039] The liquid-cooled motor housing 100 is disposed between the bottom plate 81 and the sealing plate 82, and the threaded hole and the inner cavity 100a are respectively connected to the threaded hole detection channel and the inner cavity detection channel 12, and the threaded hole detection channel and the inner cavity detection channel 12 are disposed on the bottom plate 81 and / or the sealing plate 82;

[0040] The air tightness leak detection device comprises an air tightness detector 84 , and the air tightness detector 84 is connected to the threaded hole detection channel and the inner cavity detection channel 12 .

[0041] In this embodiment, the air tightness detector 84 is used to perform independent air tightness detection on the inner cavity 100a and the threaded holes of the liquid-cooled motor housing 100 .

[0042] In this embodiment, the above structure can perform independent airtightness detection on the inner cavity 100a and the threaded hole of the liquid-cooled motor casing 1000. Compared with the existing detection method, it can identify the location of the airtightness defect, thereby improving the defect and intercepting the outflow of the liquid-cooled motor casing with airtightness defects, avoiding losses and complaints caused by the scrapping of the entire machine, and improving the accuracy of airtightness detection.

[0043] In this embodiment, the threaded holes include a plurality of upper threaded holes 100b and lower threaded holes 100c respectively disposed on the surfaces of both ends of the liquid-cooled motor housing 100;

[0044] The threaded hole detection channel includes a first detection channel 11 and a second detection channel 12, wherein the first detection channel 11 is arranged on the sealing plate 82, and the second detection channel 12 and the inner cavity detection channel 12 are arranged on the bottom plate 81;

[0045] The first detection channel 11 is connected to the upper threaded hole 100b, the second detection channel 12 is connected to the lower threaded hole 100c, and the inner cavity detection channel 12 is connected to the inner cavity; the working principle of the device is as follows:

[0046] Loading: After the liquid-cooled motor housing 100 is loaded, the sealing plate lifting mechanism 83 is driven to clamp the liquid-cooled motor housing 100 and seal the inner cavity 100a, the upper threaded hole 100b and the lower threaded hole 100c;

[0047] Air tightness test: The air tightness tester 84 pressurizes and inflates the inner cavity 100a and the upper threaded hole 100b and the lower threaded hole 100c, and determines whether the inner cavity 100a and the threaded hole are leaking by the change in pressure value: only if the inner cavity 100a and the threaded hole are not leaking, it is judged as qualified, otherwise it is unqualified.

[0048] Further, such as Figure 4 , 5 As shown, the threaded hole detection channel includes a plurality of threaded hole air inlet paths, and the inner cavity detection channel 12 includes one or more inner cavity air inlet paths 12b;

[0049] The threaded hole air inlet path is provided with a threaded hole air inlet hole and a threaded hole air outlet hole, and the threaded hole air outlet hole is connected with the threaded hole; the inner cavity air inlet path 12b is provided with an inner cavity air inlet hole 12c and an inner cavity air outlet hole 12a, and the inner cavity air outlet hole 12a is connected with the inner cavity 100a;

[0050] The threaded hole air inlet and the inner cavity air inlet 12c are connected to the air tightness detector 84.

[0051] In this embodiment, the threaded hole air inlet path includes a first air inlet path 31b and a second air inlet path 11b, the threaded hole air outlet includes a first air outlet 31a and a second air outlet 11a, and the threaded hole air inlet includes a first air inlet 31c and a second air inlet 11c;

[0052] The first air inlet passage 31b, the first air inlet hole 31c and the first air outlet hole 31a are arranged on the sealing plate 82;

[0053] The second air inlet passage 11b, the second air outlet 11a and the second air inlet 11c are disposed on the bottom plate 81;

[0054] The first air inlet path 31b is connected to the upper threaded hole 100b through the first air outlet hole 31a, and the second air inlet path 11b is connected to the lower threaded hole 100c through the second air outlet hole 11a;

[0055] The first air inlet path 31 and the second air inlet path 11 are connected to the air tightness detector 84 through the first air inlet hole 31c and the second air inlet hole 11c respectively;

[0056] Working principle of airtightness detection:

[0057] Threaded hole air tightness test:

[0058] When testing the air tightness of the upper threaded hole 100b, the air tightness tester 84 pressurizes and inflates the plurality of upper threaded holes 100b through the first air inlet 31c, the first air inlet path 31b and the first air outlet 31a in sequence, thereby judging the air tightness of the upper threaded hole 100b by the pressure value;

[0059] When testing the air tightness of the lower threaded holes 100c, the air tightness tester 84 pressurizes and inflates the multiple lower threaded holes 100c through the second air outlet 11a, the second air inlet 11b and the second air outlet 11a in sequence, so as to judge the air tightness of the lower threaded holes 100c by the pressure value; during the process, the air tightness tests of the upper threaded holes 100b and the lower threaded holes 100c are carried out simultaneously.

[0060] Inner cavity 100a air tightness test:

[0061] The air tightness detector 84 pressurizes and inflates the inner cavity 100a through the inner cavity air inlet hole 12c, the inner cavity air inlet path 12b and the inner cavity air outlet hole 12a in sequence, thereby judging the air tightness of the inner cavity 100a by the pressure value; during the process, the air tightness of the threaded hole can be tested.

[0062] Further, such as Figure 4 , 5 As shown, a plurality of the threaded hole air inlet paths are connected in series, and one of the threaded hole air inlet holes is connected to the air tightness detector 84; a plurality of the inner cavity air inlet paths 12b are connected in series, and one of the inner cavity air inlet holes 12c is connected to the air tightness detector 84;

[0063] The other plurality of threaded air inlet holes and the inner cavity air inlet hole 12c are respectively blocked by blocking members.

[0064] In this embodiment, a plurality of the first air inlet paths 31b are connected in series, wherein one of the first air inlet holes 31c is connected to the air tightness detector 84; a plurality of the second air inlet paths 11b are connected in series, wherein one of the second air inlet holes 11c is connected to the air tightness detector 84; a plurality of the inner cavity air inlet paths 12b are connected in series, wherein one of the inner cavity air inlet holes 12c is connected to the air tightness detector 84;

[0065] The other plurality of first air inlet holes 31c, second air inlet holes 11c and inner cavity air inlet holes 12c are blocked by blocking members respectively and are not marked in the figure;

[0066] Compared with the structure in which each of the first air inlet hole 31c, the second air inlet hole 11c and the inner cavity air inlet hole 12c is individually connected to the air tightness detector 84, the above structure has high connection efficiency and low manufacturing cost.

[0067] Further, such as Figure 2 As shown, an upper annular sealing groove 32 is provided at the connection between the sealing plate 82 and the liquid-cooled motor housing 100, a lower annular sealing groove 13 is provided at the connection between the bottom plate 81 and the liquid-cooled motor housing 100, and the threaded hole air outlet is provided on the upper annular sealing groove 32 and / or the lower annular sealing groove 13.

[0068] Further, such as Figure 2As shown, sealing gaskets 5 are arranged in the upper annular sealing groove 32 and the lower annular sealing groove 13 .

[0069] In this embodiment, the first air outlet 31a is located on the upper annular sealing groove 32, and the second air outlet 11a is located on the lower annular sealing groove 13. The above structure facilitates the rapid clamping and positioning of the liquid-cooled motor housing 100, and ensures the sealing of the two ends of the liquid-cooled motor housing 100 respectively connected to the sealing plate 82 and the bottom plate 81.

[0070] Further, such as Figure 1 , 2 As shown, the sealing plate lifting mechanism 83 includes a lifting driver 831 , and the lifting driver 831 is located above the sealing plate. The lifting driver 831 is connected to the frame, and a driving end thereof is connected to the sealing plate 82 .

[0071] In this embodiment, the above structure realizes the clamping and fixing of the liquid-cooled motor housing 100 .

[0072] Further, if Figure 1 , 2 As shown, the sealing plate lifting mechanism 83 further includes a buffer component 832, and two ends of the buffer component 832 are respectively connected to the frame 2 and the sealing plate 82.

[0073] The buffer assembly 832 ensures the downward pressure of the sealing plate 82 to prevent damage to the liquid-cooled motor housing 100 caused by excessive pressure.

[0074] Further, such as Figure 1 As shown, positioning components 7 are arranged around the liquid-cooled motor housing 100; the positioning components 7 are used to position the liquid-cooled motor housing 100 for loading.

[0075] Further, such as Figure 1 , 2 As shown, a plugging component 9 is arranged around the liquid-cooled motor housing 100 , and the plugging component 9 is used to plug the wiring harness hole on the side of the liquid-cooled motor housing 100 .

[0076] Further, such as Figure 2 As shown, the positions of the sealing plate 82 and the bottom plate 81 corresponding to the inner cavity 100a are respectively provided with fillers 6 for filling the inner cavity 100a.

[0077] In this embodiment, the filler 6 is used to reduce the gas filling amount during air tightness testing, reduce the pressurization and inflation time, and improve the testing efficiency. For those skilled in the art, various other corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all of these changes and deformations should fall within the protection scope of the claims of the utility model patent.

Claims

1. An airtight leak detection device, characterized in that: Applicable to a liquid-cooled motor housing (100), wherein a through inner cavity (100a) is provided on the inner side of the liquid-cooled motor housing (100), and a threaded hole is provided on at least one end of the liquid-cooled motor housing (100); The airtightness leak detection device comprises a bottom plate (81) and a sealing plate (82) connected to the frame (2), and a sealing plate lifting mechanism (83) is provided between the sealing plate (82) and the frame (2); The liquid-cooled motor housing (100) is arranged between the bottom plate (81) and the sealing plate (82); the threaded hole and the inner cavity (100a) are respectively connected to the threaded hole detection channel and the inner cavity detection channel (12); and the threaded hole detection channel and the inner cavity detection channel (12) are arranged on the bottom plate (81) and / or the sealing plate (82); The airtightness leak detection device comprises an airtightness detector (84), and the airtightness detector (84) is connected to the threaded hole detection channel and the inner cavity detection channel (12).

2. The airtightness leak detection device according to claim 1, characterized in that: The threaded hole detection channel comprises a plurality of threaded hole air inlet paths, and the inner cavity detection channel (12) comprises one or more inner cavity air inlet paths (12b); The threaded hole air inlet path is provided with a threaded hole air inlet hole and a threaded hole air outlet hole, and the threaded hole air outlet hole is connected to the threaded hole; the inner cavity air inlet path (12b) is provided with an inner cavity air inlet hole (12c) and an inner cavity air outlet hole (12a), and the inner cavity air outlet hole (12a) is connected to the inner cavity (100a); The threaded hole air inlet and the inner cavity air inlet (12c) are connected to an air tightness detector (84).

3. The airtightness leak detection device according to claim 2, characterized in that: A plurality of the threaded hole air inlet paths are connected in series, and one of the threaded hole air inlet holes is connected to an air tightness detector (84); a plurality of the inner cavity air inlet paths (12b) are connected in series, and one of the inner cavity air inlet holes (12c) is connected to an air tightness detector (84); The other plurality of threaded hole air inlet holes and the inner cavity air inlet hole (12c) are respectively blocked by blocking members.

4. The airtightness leak detection device according to claim 2, characterized in that: An upper annular sealing groove (32) is provided at the connection between the sealing plate (82) and the liquid-cooled motor housing (100), a lower annular sealing groove (13) is provided at the connection between the bottom plate (81) and the liquid-cooled motor housing (100), and the threaded hole air outlet is provided on the upper annular sealing groove (32) and / or the lower annular sealing groove (13).

5. The airtightness leak detection device according to claim 4, characterized in that: Sealing gaskets (5) are arranged in the upper annular sealing groove (32) and the lower annular sealing groove (13).

6. The airtightness leak detection device according to claim 1, characterized in that: The sealing plate lifting mechanism (83) comprises a lifting driver (831), wherein the lifting driver (831) is located above the sealing plate, the lifting driver (831) is connected to the frame, and a driving end thereof is connected to the sealing plate (82).

7. The airtightness leak detection device according to claim 6, characterized in that: The sealing plate lifting mechanism (83) further comprises a buffer component (832), and two ends of the buffer component (832) are respectively connected to the frame (2) and the sealing plate (82).

8. The airtightness leak detection device according to claim 1, characterized in that: Positioning components (7) are arranged around the liquid-cooled motor casing (100); the positioning components (7) are used to position the liquid-cooled motor casing (100) for loading.

9. The airtightness leak detection device according to claim 1, characterized in that: A blocking component (9) is arranged around the liquid-cooled motor housing (100), and the blocking component (9) is used to block the wiring harness hole on the side of the liquid-cooled motor housing (100).

10. The airtight leak detection device according to claim 1, characterized in that: Fillers (6) for filling the inner cavity (100a) are respectively arranged at positions of the sealing plate (82) and the bottom plate (81) corresponding to the inner cavity (100a).

Images