A turbine shell leak detection tool
By designing a flange sealing block and auxiliary components for turbine housing leak testing, impurities are removed, and leak testing is achieved using airflow. This solves the problem of insufficient sealing at the turbine housing flange end and improves the reliability and accuracy of leak testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- JIANGYIN MASCH-BUILDING INC
- Filing Date
- 2026-04-15
- Publication Date
- 2026-06-05
AI Technical Summary
Existing turbine housing leak detection fixtures suffer from insufficient reliability due to impurities affecting the sealing performance of the turbine housing flange end.
A turbine housing leak testing fixture was designed, comprising a base plate, a positioning mechanism, first to third sealing mechanisms, and a testing mechanism. Impurities at the flange end are removed by the flange sealing block and auxiliary components of the third sealing mechanism, and leak testing is achieved by utilizing the airflow in the exhaust and intake ducts, thus avoiding false detections due to blockage.
This improves the reliability of turbine housing leak detection, ensures flange end sealing, avoids false detections caused by impurities and intake blockage, and enhances leak detection accuracy.
Smart Images
Figure CN122149774A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a turbine housing leak testing fixture, belonging to the field of leak testing fixture technology. Background Technology
[0002] The turbine housing, also known as the turbine casing, is an important component of a turbocharger. It is responsible for guiding the exhaust gases from the engine to the turbine impeller, driving the turbine to rotate, which in turn drives the compressor to boost the engine's intake air. As a crucial component of a car, the turbine housing's sealing performance is an important performance indicator.
[0003] Chinese utility model patent CN219142111U discloses a turbine housing leak detection fixture for easy and quick mold change. It includes a base plate and an air passage connection plate. An air passage support plate is mounted on the base plate, and a turbine housing support plate is mounted on the air passage support plate. A waste gas port sealing ring is installed on the top of the turbine housing support plate. The turbine housing support plate is surrounded by a turbine housing clamping mechanism, a turbine housing positioning mechanism, and a turbine housing sealing mechanism. The turbine housing clamping mechanism includes a clamping cylinder, with the cylinder body mounted on the base plate. The piston end of the clamping cylinder is vertically upward and hinged to one end of a jaw. The other end of the jaw is located above the turbine housing support plate. The middle of the jaw is hinged to the upper end of a transition rod, and the lower end of the transition rod is hinged to the upper end of a jaw seat. The lower end of the jaw seat is connected to the cylinder body of the clamping cylinder. This utility model has a simple structure and occupies little space; it reduces the labor intensity of operators and improves work efficiency. However, in the prior art, due to the large sealing area of the turbine housing flange end, impurities can easily cause poor sealing at the turbine housing flange end, thus affecting the reliability of turbine housing leak detection.
[0004] Therefore, a turbine housing leak detection tool is needed to improve the reliability of turbine housing leak detection. Summary of the Invention
[0005] The technical problem to be solved by the present invention is to provide a turbine housing leak detection tooling to overcome the shortcomings of the prior art and improve the reliability of turbine housing leak detection.
[0006] The technical solution adopted by the present invention to solve the above problems is as follows: a turbine housing leak detection fixture, including a base plate, on which a base, a positioning mechanism, a first sealing mechanism, a second sealing mechanism and a third sealing mechanism are provided. The positioning mechanism, the first sealing mechanism, the second sealing mechanism and the third sealing mechanism are distributed circumferentially around the base. A testing mechanism is provided above the base. The base is used to seal the air outlet end of the turbine housing and to position the turbine housing horizontally. The positioning mechanism is used to position the turbine housing at an angle. The first sealing mechanism is used to seal the bushing hole on the turbine housing. The second sealing mechanism is used to seal the plug hole on the turbine housing. The third sealing mechanism is used to seal the flange end on the turbine housing. The testing mechanism is used to seal the air inlet end of the turbine housing and to perform leak detection. The third sealing mechanism includes a third bracket, on which a third cylinder is provided. A flange sealing block is provided at the piston end of the third cylinder, and an auxiliary component is connected to the flange sealing block. The auxiliary components include an air hood and an air box. The air hood is fixedly installed on the side of the flange sealing block near the base and has an exhaust port. An air inlet channel is provided inside the flange sealing block, with both ends extending to the outer wall of the flange sealing block. The middle end of the air inlet channel is connected to the air hood through an exhaust channel. The air box is fixedly installed on the base plate and has two connecting pipes. The air box is connected to both ends of the exhaust channel through the two connecting pipes. An extrusion member is provided on the air box and is connected to the flange sealing block. When the flange sealing block moves, the extrusion member extrudes the air inside the air box.
[0007] Preferably, the connecting pipe is a flexible hose.
[0008] Preferably, the extrusion component includes a conduit fixedly mounted on the gas box and communicating with the gas box. An extrusion plate is disposed inside the conduit, and the extrusion plate is slidably and sealingly connected to the conduit. The extrusion plate is fixedly connected to a flange sealing block via a connecting frame.
[0009] Preferably, the base includes a fixed seat and a positioning core vertically fixedly disposed on the top of the fixed seat, and the fixed seat is fixedly disposed on the base plate.
[0010] Preferably, the top of the fixing seat is provided with a groove, and the bottom end of the positioning core is provided with a protrusion, the protrusion matching the groove and the protrusion being inserted into the groove.
[0011] Preferably, the mounting base is provided with an exhaust duct.
[0012] Preferably, the positioning mechanism includes a positioning seat and a positioning bolt, the positioning seat is fixedly mounted on the base plate, and the positioning bolt is threadedly connected to the positioning seat.
[0013] Preferably, the first sealing mechanism includes a first bracket, on which a first cylinder is mounted, and a bushing sealing block is mounted on the piston end of the first cylinder. The second sealing mechanism includes a second bracket, on which a second cylinder is mounted, and a plug sealing block is mounted on the piston end of the second cylinder.
[0014] Preferably, the testing mechanism includes a test block with an air intake channel and a lifting system connected to it. The lifting system enables the test block to be raised and lowered. The bottom of the test block is fixedly mounted on a sealing gasket with a first through hole communicating with the air intake channel. The bottom of the sealing gasket is fixedly mounted on a guide block with a second through hole communicating with the first through hole.
[0015] Preferably, the flange sealing block is provided with an annular sealing groove for installing a sealing ring.
[0016] Compared with the prior art, the advantages of the present invention are as follows: This invention discloses a turbine housing leak detection fixture. By applying air to the flange end of the turbine housing, impurities at the flange end are blown away, preventing impurities from affecting the sealing effect of the flange end of the turbine housing and improving the reliability of turbine housing leak detection. In addition, by setting an exhaust duct on the fixed base, the air delivered into the turbine housing is discharged from the exhaust duct. By testing the air flow entering through the intake duct and the air flow exiting through the exhaust duct, not only can turbine housing leak detection be achieved, but false detections caused by blockage at the turbine housing intake end can also be avoided, thereby further improving the reliability of turbine housing leak detection. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the turbine housing leak detection tool in its working state according to the present invention; Figure 2 This is a first perspective view of the turbine housing; Figure 3 This is a second perspective view of the turbine housing; Figure 4 This is a perspective view of a turbine housing leak testing fixture according to the present invention; Figure 5 A perspective view of the turbine housing; Figure 6 A 3D view of the positioning core; Figure 7 This is a three-dimensional view of the mounting base; Figure 8 This is a sectional view of the mounting base; Figure 9 A 3D view of the positioning mechanism; Figure 10 This is a three-dimensional view of the first sealing mechanism; Figure 11 This is a three-dimensional view of the second sealing mechanism; Figure 12 A three-dimensional view of the third sealing mechanism; Figure 13 This is a schematic diagram of the connection structure between the auxiliary component and the flange sealing block; Figure 14 for Figure 13 A sectional view; Figure 15 This is a 3D view of the flange sealing block; Figure 16 This is a cross-sectional view of the flange sealing block; Figure 17 This is a three-dimensional view of the air shield; Figure 18 A 3D view of the testing facility; Figure 19 This is a cross-sectional view of the testing facility.
[0018] in: 1. Base plate; 2. Base; 3. Positioning mechanism; 4. First sealing mechanism; 5. Second sealing mechanism; 6. Third sealing mechanism; 7. Testing mechanism; 8. Turbine housing; Fixing base 21, positioning core 22, groove 23, protrusion 24, exhaust duct 25; Positioning seat 31, positioning bolt 32; First bracket 41, first cylinder 42, bushing sealing block 43; Second bracket 51, second cylinder 52, plug sealing block 53; Third bracket 61, third cylinder 62, flange sealing block 63, auxiliary component 64, sealing groove 65; Air hood 641, air box 642, exhaust port 643, first air passage 644, second air passage 645, connecting pipe 646, guide tube 647, extrusion plate 648, connecting frame 649; Test block 71, air intake duct 72, sealing gasket 73, first through hole 74, guide block 75, second through hole 76; Air outlet 81, bushing hole 82, plug hole 83, flange end 84, air inlet end 85. Detailed Implementation
[0019] like Figures 1 to 19As shown, a turbine housing leak testing fixture in this embodiment includes a base plate 1. A base 2, a positioning mechanism 3, a first sealing mechanism 4, a second sealing mechanism 5, and a third sealing mechanism 6 are mounted on the base plate 1. These mechanisms are circumferentially distributed around the base 2. A testing mechanism 7 is mounted above the base 2. The base 2 is used to seal the outlet end 81 of the turbine housing 8 and to position the turbine housing 8 horizontally. The positioning mechanism 3 is used to position the turbine housing 8 at an angle. The first sealing mechanism 4 is used to seal the bushing hole 82 of the turbine housing 8. The second sealing mechanism 5 is used to seal the plug hole 83 of the turbine housing 8. The third sealing mechanism 6 is used to seal the flange end 84 of the turbine housing 8. The testing mechanism 7 is used to seal the inlet end 85 of the turbine housing 8 and to perform leak testing. The base 2 includes a fixed seat 21 and a positioning core 22 vertically fixed on the top of the fixed seat 21. The fixed seat 21 is fixed on the base plate 1. The top of the fixed seat 21 is provided with a groove 23. The bottom of the positioning core 22 is provided with a protrusion 24. The protrusion 24 matches the groove 23 and is inserted into the groove 23. During leak testing, the air outlet 81 of the turbine housing 8 is placed on the fixed seat 21, and the air outlet 81 of the turbine housing 8 is sealed by the fixed seat 21. At this time, the positioning core 22 is inserted from the air outlet 81 of the turbine housing 8. Through the cooperation between the positioning core 22 and the turbine housing 8, the turbine housing 8 is positioned in the horizontal direction. The positioning mechanism 3 includes a positioning seat 31 and a positioning bolt 32. The positioning seat 31 is fixedly mounted on the base plate 1, and the positioning bolt 32 is threadedly connected to the positioning seat 31. After the turbine housing 8 is placed on the fixed seat 21, the turbine housing 8 is rotated around the positioning core 22 until one side of the flange end 84 on the turbine housing 8 abuts against the end of the positioning bolt 32. In this way, the angle positioning of the turbine housing 8 is achieved. When the position of the end of the positioning bolt 32 is adjusted by rotating the positioning bolt 32, the positioning angle of the turbine housing 8 can be adjusted. The first sealing mechanism 4 includes a first bracket 41, on which a first cylinder 42 is provided. A bushing sealing block 43 is provided at the piston end of the first cylinder 42. After the turbine housing 8 is positioned horizontally and angularly, the bushing sealing block 43 is moved by the first cylinder 42 so that the bushing sealing block 43 fits and seals with the bushing hole 82 of the turbine housing 8. The second sealing mechanism 5 includes a second bracket 51, on which a second cylinder 52 is provided. A plug sealing block 53 is provided at the piston end of the second cylinder 52. After the turbine housing 8 is positioned horizontally and angularly, the plug sealing block 53 is driven to move by the second cylinder 52, so that the plug sealing block 53 fits and seals with the plug hole 83 of the turbine housing 8. The third sealing mechanism 6 includes a third support 61, on which a third cylinder 62 is mounted. A flange sealing block 63 is mounted on the piston end of the third cylinder 62. An auxiliary component 64 is connected to the flange sealing block 63. After the turbine housing 8 is positioned horizontally and angularly, the flange sealing block 63 is moved by the third cylinder 62, so that the flange sealing block 63 fits and seals with the flange end 84 of the turbine housing 8. When the flange sealing block 63 moves, the auxiliary component 64 removes impurities from the flange end 84 of the turbine housing 8, preventing impurities from affecting the sealing effect of the flange end 84 of the turbine housing 8 and improving the reliability of turbine housing leak detection. The auxiliary component 64 includes an air hood 641 and an air box 642. The air hood 641 is fixedly installed on the side of the flange sealing block 63 near the base 2. The air hood 641 is provided with exhaust holes 643. Multiple exhaust holes 643 are provided and distributed circumferentially. The flange sealing block 63 is provided with a first air passage 644. Both ends of the first air passage 644 extend to the outer wall of the flange sealing block 63. The middle end of the first air passage 644 is connected to the air hood 641 through a second air passage 645. The air box 642 is fixedly installed on the base plate 1. The air box 642 is provided with two connecting pipes 646. The air box 642 is connected to both ends of the first air passage 644 through the two connecting pipes 646 respectively. The connecting pipes 646 are flexible hoses. The air box 642 is provided with a pressing member. The pressing member is connected to the flange sealing block 63. When the flange sealing block 63 moves, the pressing member compresses the air in the air box 642. The extrusion component includes a conduit 647, which is fixedly mounted on an air box 642 and communicates with the air box 642. An extrusion plate 648 is disposed inside the conduit 647, and the extrusion plate 648 is slidably and sealingly connected to the conduit 647. The extrusion plate 648 is fixedly connected to a flange sealing block 63 through a connecting bracket 649. During the movement of the flange sealing block 63, the connecting frame 649 drives the extrusion plate 648 to move in the same direction within the guide tube 647, and extrudes the air within the guide tube 647 to the air box 642, thereby compressing the air within the air box 642. The air within the air box 642 is then sequentially transported from the first air passage 644 and the second air passage 645 to the air cover 641, where the air is discharged from the exhaust port 643. Here, when the flange sealing block 63 is in contact with the flange end 84 of the turbine housing 8, the air cover 641 is first inserted into the flange end 84 of the turbine housing 8, and the air discharged from the exhaust port 643 acts on the flange end 84 of the turbine housing 8. Under the action of the airflow, impurities on the flange end 84 are blown away. The top of the air box 642 fits against the top of the flange sealing block 63, thus providing support for the flange sealing block 63. The flange sealing block 63 is provided with an annular sealing groove 65, which is used to install a sealing ring. When the flange sealing block 63 is in contact with the flange end 84 of the turbine housing 8, the sealing effect of the flange end 84 is improved through the sealing ring in the sealing groove 65. The testing mechanism 7 includes a test block 71, on which an air intake passage 72 is provided. A lifting system (not shown in the figure) is connected to the test block 71 to raise and lower it. Here, the lifting system can be a lifting cylinder. The bottom of the test block 71 is fixedly mounted on a sealing gasket 73. The sealing gasket 73 has a first through hole 74 communicating with the air intake passage 72. The bottom of the sealing gasket 73 is fixedly mounted on a guide block 75. The guide block 75 has a second through hole 76 communicating with the first through hole 74. (Turbine housing...) After horizontal and angular positioning is achieved, the test block 71 is driven to descend by the lifting system, so that the guide block 75 is inserted into the air inlet 85 of the turbine housing 8. Then, the sealing gasket 73 is attached to the top of the air inlet of the turbine housing 8 and sealed. In fact, the guide block 75 matches the air inlet 85 of the turbine housing 8. The air inlet passage 72 is connected to the air source. After the bushing hole 82, the plug hole 83 and the flange end 84 of the turbine housing 8 are sealed, the air source delivers air sequentially from the air inlet passage 72, the first through hole 74 and the second through hole 76 to the inner cavity of the turbine housing 8. By testing the air pressure inside the turbine housing 8, the leak detection of the turbine housing 8 can be achieved. The fixed base 21 is provided with an exhaust air passage 25. When the turbine housing 8 is placed on the fixed base 21 and positioned horizontally, the exhaust air passage 25 is connected to the internal cavity of the turbine housing 8. Air is delivered into the turbine housing 8 and then discharged from the exhaust air passage 25. By testing the air flow input into the intake air passage 72 and the air flow discharged from the exhaust air passage 25, not only can the leak detection of the turbine housing 8 be realized, but also the false detection caused by the blockage of the intake end 85 of the turbine housing 8 can be avoided, thereby further improving the reliability of the turbine housing leak detection. In summary, by applying air to the flange end 84 of the turbine housing 8, impurities at the flange end 84 of the turbine housing 8 are blown away, preventing impurities from affecting the sealing effect of the flange end 84 of the turbine housing 8 and improving the reliability of turbine housing leak detection. In addition, by setting an exhaust duct 25 on the fixed seat 21, the air delivered into the turbine housing 8 is discharged from the exhaust duct 25. By testing the air flow input into the intake duct 72 and the air flow discharged from the exhaust duct 25, not only can the leak detection of the turbine housing 8 be achieved, but also false detection caused by blockage of the intake end 85 of the turbine housing 8 can be avoided, thereby further improving the reliability of turbine housing leak detection.
[0020] In addition to the above embodiments, the present invention also includes other embodiments. All technical solutions formed by equivalent transformation or equivalent substitution should fall within the protection scope of the claims of the present invention.
Claims
1. A turbine housing leak testing fixture, comprising a base plate (1), wherein a base (2), a positioning mechanism (3), a first sealing mechanism (4), a second sealing mechanism (5), and a third sealing mechanism (6) are disposed on the base plate (1), the positioning mechanism (3), the first sealing mechanism (4), the second sealing mechanism (5), and the third sealing mechanism (6) are distributed circumferentially around the base (2), and a testing mechanism (7) is disposed above the base (2), wherein the base (2) is used to seal the outlet end (81) of the turbine housing (8) and to realize the leak testing of the turbine housing (8). The positioning mechanism (3) is used to achieve the angular positioning of the turbine housing (8) in the horizontal direction of the turbine housing (8), the first sealing mechanism (4) is used to achieve the sealing of the bushing hole (82) on the turbine housing (8), the second sealing mechanism (5) is used to achieve the sealing of the plug hole (83) on the turbine housing (8), the third sealing mechanism (6) is used to achieve the sealing of the flange end (84) on the turbine housing (8), and the testing mechanism (7) is used to achieve the sealing of the air inlet end (85) on the turbine housing (8) and to perform leak detection. The features are: The third sealing mechanism (6) includes a third bracket (61), a third cylinder (62) is provided on the third bracket (61), a flange sealing block (63) is provided on the piston end of the third cylinder (62), and an auxiliary component (64) is connected to the flange sealing block (63). The auxiliary component (64) includes an air hood (641) and an air box (642). The air hood (641) is fixedly installed on the side of the flange sealing block (63) near the base (2). The air hood (641) is provided with an exhaust port (643). An air inlet channel (72) is provided inside the flange sealing block (63). Both ends of the air inlet channel (72) extend to the outer wall of the flange sealing block (63). The middle end of the air inlet channel (72) passes through an exhaust channel (25). The air box (642) is fixedly mounted on the base plate (1) and connected to the air hood (641). The air box (642) is provided with two connecting pipes (646). The air box (642) is connected to both ends of the exhaust duct (25) through the two connecting pipes (646). The air box (642) is provided with an extrusion member. The extrusion member is connected to the flange sealing block (63). When the flange sealing block (63) moves, the extrusion member extrudes the air in the air box (642).
2. The turbine housing leak testing fixture according to claim 1, characterized in that: The connecting pipe (646) is a flexible hose.
3. The turbine housing leak testing fixture according to claim 1, characterized in that: The extrusion component includes a conduit (647), which is fixedly mounted on the air box (642) and communicates with the air box (642). An extrusion plate (648) is provided inside the conduit (647), and the extrusion plate (648) is slidably and sealingly connected to the conduit (647). The extrusion plate (648) is fixedly connected to the flange sealing block (63) through a connecting bracket (649).
4. The turbine housing leak testing fixture according to claim 1, characterized in that: The base (2) includes a fixed seat (21) and a positioning core (22) vertically fixed on the top of the fixed seat (21). The fixed seat (21) is fixed on the base plate (1).
5. A turbine housing leak testing fixture according to claim 4, characterized in that: The top of the fixing seat (21) is provided with a groove (23), and the bottom of the positioning core (22) is provided with a protrusion (24). The protrusion (24) matches the groove (23) and is inserted into the groove (23).
6. The turbine housing leak testing fixture according to claim 4, characterized in that: An exhaust duct (25) is provided on the fixed base (21).
7. The turbine housing leak testing fixture according to claim 1, characterized in that: The positioning mechanism (3) includes a positioning seat (31) and a positioning bolt (32). The positioning seat (31) is fixedly mounted on the base plate (1), and the positioning bolt (32) is threadedly connected to the positioning seat (31).
8. The turbine housing leak testing fixture according to claim 1, characterized in that: The first sealing mechanism (4) includes a first bracket (41), on which a first cylinder (42) is provided, and a bushing sealing block (43) is provided at the piston end of the first cylinder (42). The second sealing mechanism (5) includes a second bracket (51), on which a second cylinder (52) is provided, and a plug sealing block (53) is provided at the piston end of the second cylinder (52).
9. A turbine housing leak testing fixture according to claim 1, characterized in that: The testing mechanism (7) includes a test block (71), an air intake channel (72) is provided on the test block (71), a lifting system is connected to the test block (71), the lifting system is used to lift the test block (71), the bottom of the test block (71) is fixedly provided on a sealing gasket (73), the sealing gasket (73) is provided with a first through hole (74), the first through hole (74) is connected to the air intake channel (72), the bottom of the sealing gasket (73) is fixedly provided on a guide block (75), the guide block (75) is provided with a second through hole (76), the second through hole (76) is connected to the first through hole (74).
10. A turbine housing leak testing fixture according to claim 1, characterized in that: The flange sealing block (63) is provided with an annular sealing groove (65), which is used to install a sealing ring.