Negative pressure type turbocharging shell

Abstract

The utility model discloses a negative pressure type turbocharging shell, which relates to the technical field of turbochargers, and comprises a middle body, both sides of the middle body are provided with connecting discs through bolts, and the outer sides of the two connecting discs are respectively provided with a first turbine shell and a second turbine shell; threaded sleeves which are symmetrically distributed are fixedly arranged on the sides, close to the connecting disc, of the first turbine shell and the second turbine shell, three threaded sleeves which are distributed at equal intervals are arranged on each of the two sides, close to the connecting disc, of the first turbine shell and the second turbine shell, and connecting rings are fixedly connected to the two sides of the connecting disc. According to the negative pressure type turbocharging shell, through the running fit design of the threaded sleeves and the connecting bolts, the first turbine shell body and the second turbine shell body are allowed to conduct circumferential angle adjustment around the connecting rings in the assembling process, the orientation of pipelines outside the turbine shell bodies is freely adjusted, and the problem of installation conflicts or airflow interference caused by the fixed angle is avoided.

Description

Technical Field

[0001] This utility model relates to the field of turbocharger technology, specifically to a negative pressure turbocharger housing. Background Technology

[0002] A turbocharger is a device used to increase the amount of air entering an internal combustion engine, which can significantly enhance the engine's performance and efficiency. It consists of an impeller mounted on a turbine housing.

[0003] To achieve the above functions, a prior art Chinese patent (publication number: CN212027894U) discloses a turbocharger volute housing, including a volute housing shell, a volute flow channel within the volute housing shell, a partition wall within the volute flow channel, and a volute profile within the volute housing shell. A volute outlet is formed on the inner side of the volute profile, and a volute tongue is provided on the inner side of the volute housing shell corresponding to the volute outlet. A central shaft is provided in the central rotation area of ​​the volute outlet. A portion of the inner wall of the volute profile is coaxial with the central shaft, while a portion of the inner wall of the volute profile is eccentrically positioned with respect to the central shaft, resulting in a non-circular volute outlet. The non-circularity of the volute outlet is distributed along the axial direction of the volute profile. This effectively reduces the risk of friction between the turbine and the volute housing, further improving turbocharger reliability, while having a low impact on turbocharger performance.

[0004] While existing technologies can overcome the shortcomings mentioned above, other problems still exist in their operation: the turbine housing forms an air duct inside and has pipes distributed along its tangential direction on the outside, and the airflow flows inside the air duct and pipes when the turbocharger is running. The existing turbine housing has a fixed angle during installation, making it inconvenient to adjust the orientation of the pipes. Utility Model Content

[0005] The purpose of this invention is to provide a negative pressure turbocharger housing to solve the problem in the prior art where the angle of the existing turbine housing is fixed during installation, making it inconvenient to adjust the orientation of the pipeline.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a negative pressure turbocharger housing, comprising an intermediate body, wherein connecting discs are bolted to both sides of the intermediate body, and a first turbine housing and a second turbine housing are respectively mounted on the outer sides of the two connecting discs;

[0007] The first turbine housing and the second turbine housing are fixedly provided with symmetrically distributed threaded sleeves on the side near the connecting plate. Each of the first turbine housing and the second turbine housing is provided with three equally spaced threaded sleeves on both sides near the connecting plate. Both sides of the connecting plate are fixedly connected with connecting rings. The threaded sleeves are threaded with connecting bolts, which pass through the connecting rings and are screwed into the threaded sleeves.

[0008] Preferably, a washer is provided on the outside of the connecting bolt. The washer is located between the end of the connecting ring and the connecting bolt. Two symmetrically distributed limiting strips are fixedly connected to one side of the washer. The limiting strips are slidably connected to the inside of the connecting ring. Both sides of the washer are provided with anti-slip textures.

[0009] Preferably, a synchronous shaft is rotatably connected inside the intermediate body. The two ends of the synchronous shaft extend symmetrically to both sides of the intermediate body, pass through the connecting plate, and extend to the internal center of the first turbine housing and the second turbine housing.

[0010] Preferably, the end of the synchronous shaft is provided with a connecting thread, a positioning sleeve is fixedly connected to the outside of the synchronous shaft, and a fixing nut is threadedly connected to the end of the synchronous shaft through the connecting thread. An impeller is slidably sleeved on the outside of the synchronous shaft, the impeller is sandwiched between the positioning sleeve and the fixing nut, and the two impellers are respectively located inside the first turbine housing and the second turbine housing.

[0011] Preferably, the connecting disc has an internal mounting hole, and the synchronous shaft passes through the mounting hole. A bearing is fixedly installed in the mounting hole, and the bearing is sleeved on the outside of the positioning sleeve.

[0012] Preferably, the outer side of the first turbine housing has a first air inlet distributed along the tangential direction, the interior of the first turbine housing has a guide slit, the middle of the first turbine housing has a first exhaust port at the end away from the connecting plate, and the impeller is located inside the first exhaust port.

[0013] Preferably, a second exhaust port is distributed tangentially on the outer side of the second turbine housing, and a second air inlet is provided at the middle end of the second turbine housing away from the connecting plate, with the impeller located inside the second air inlet.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This negative pressure turbocharger housing, through the rotational engagement design of the threaded sleeve and connecting bolt, allows the first turbine housing and the second turbine housing to be circumferentially angled around the connecting ring during the assembly process, freely adjusting the orientation of the external pipes of the turbine housing, and avoiding installation conflicts or airflow interference problems caused by fixed angles.

[0016] The intermediate body, connecting plate, turbine housing, impeller and other components can be partially disassembled, forming a modular housing structure. The internal parts can be replaced without the need for complete disassembly, which facilitates maintenance. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a schematic cross-sectional view of the present invention.

[0019] Figure 3 This is a schematic diagram of the connecting disc structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the connecting bolt structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the synchronous shaft structure of this utility model;

[0022] Figure 6 This is a schematic diagram of the bearing structure of this utility model;

[0023] Figure 7 This is a schematic diagram of the turbine housing structure of this utility model.

[0024] In the diagram: 1. Intermediate body; 2. Connecting disc; 3. First turbine housing; 301. First air inlet; 302. Guide slot; 303. First exhaust port; 4. Second turbine housing; 401. Second exhaust port; 402. Second air inlet; 5. Threaded sleeve; 6. Connecting ring; 7. Connecting bolt; 8. Washer; 9. Limiting strip; 10. Synchronous shaft; 11. Connecting thread; 12. Positioning sleeve; 13. Fixing nut; 14. Impeller; 15. Mounting hole; 16. Bearing. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1: Please refer to Figure 1 - Figure 4The present invention provides the following technical solution: a negative pressure turbocharger housing, comprising an intermediate body 1, with connecting discs 2 bolted to both sides of the intermediate body 1, and a first turbine housing 3 and a second turbine housing 4 respectively mounted on the outer sides of the two connecting discs 2; symmetrically distributed threaded sleeves 5 are fixedly provided on the side of the first turbine housing 3 and the second turbine housing 4 near the connecting discs 2, and three equally spaced threaded sleeves 5 are provided on both sides of the first turbine housing 3 and the second turbine housing 4 near the connecting discs 2; connecting rings 6 are fixedly connected to both sides of the connecting discs 2; connecting bolts 7 are threadedly connected inside the threaded sleeves 5, and the connecting bolts 7 pass through the connecting rings 6 and are screwed into the threaded sleeves 5; a gasket 8 is sleeved on the outer side of the connecting bolt 7, the gasket 8 is located between the end of the connecting ring 6 and the connecting bolt 7, and two symmetrically distributed limiting strips 9 are fixedly connected to one side of the gasket 8, the limiting strips 9 are slidably connected to the inner side of the connecting ring 6, and anti-slip textures are provided on both sides of the gasket 8.

[0027] First, fix the intermediate body 1 horizontally, and then use bolts to symmetrically install the two connecting plates 2 on both sides of the intermediate body 1 to ensure that there is no gap between the contact surface of the connecting plates 2 and the intermediate body 1. Then, align the first turbine housing 3 and the second turbine housing 4 with the outer side of the connecting plates 2 for preliminary positioning.

[0028] The first turbine housing 3 and the second turbine housing 4 have symmetrically distributed threaded sleeves 5 pre-fixed on the side near the connecting plate 2. Each turbine housing has three equally spaced threaded sleeves 5 on both sides of its edge. The axis of these threaded sleeves 5 is aligned with the mounting hole of the connecting ring 6 of the connecting plate 2. During assembly, the operator needs to pass the connecting bolts 7 through the mounting hole of the connecting ring 6 in sequence and screw them into the corresponding threaded sleeves 5.

[0029] Before tightening the connecting bolt 7, the fit design of the threaded sleeve 5 and the connecting bolt 7 allows them to rotate freely at a certain angle inside the connecting ring 6. This feature allows the installation direction of the first turbine housing 3 and the second turbine housing 4 to be finely adjusted according to actual needs, adjusting the orientation of the turbine housing's air intake or exhaust port, thereby adapting to the spatial constraints of different engine layouts.

[0030] After adjustment, a shim 8 with anti-slip texture needs to be installed between the end of the connecting bolt 7 and the connecting ring 6. Two symmetrically distributed limiting strips 9 are welded to one side of the shim 8. The size of the limiting strips 9 matches the limiting groove on the inner side of the connecting ring 6. By pushing the limiting strips 9 along the connecting ring 6, the rotation of the shim 8 can be restricted. At the same time, the anti-slip texture on both sides of the shim 8 can increase the friction with the connecting ring 6 and the end of the bolt, preventing the adjusted housing from shifting due to vibration. After the shim 8 is installed, all connecting bolts 7 need to be tightened gradually in a diagonal sequence to ensure that the force between the connecting disc 2 and the two turbine housings is uniform.

[0031] Example 2: Based on Example 1, please refer to... Figure 5 - Figure 7 The following structure is also disclosed: A synchronous shaft 10 is rotatably connected inside the intermediate body 1. Both ends of the synchronous shaft 10 extend symmetrically to both sides of the intermediate body 1, and after passing through the connecting disc 2, extend to the internal center of the first turbine housing 3 and the second turbine housing 4. A connecting thread 11 is provided at the end of the synchronous shaft 10. A positioning sleeve 12 is fixedly connected to the outside of the synchronous shaft 10, and a fixing nut 13 is threadedly connected to the end of the synchronous shaft 10 through the connecting thread 11. An impeller 14 is slidably sleeved on the outside of the synchronous shaft 10, and the impeller 14 is sandwiched between the positioning sleeve 12 and the fixing nut 13. The two impellers 14 are located inside the first turbine housing 3 and the second turbine housing 4, respectively. The connecting disc 2... An internal mounting hole 15 is provided, and a synchronous shaft 10 passes through the mounting hole 15. A bearing 16 is fixedly installed in the mounting hole 15, and the bearing 16 is sleeved on the outside of the positioning sleeve 12. A first air inlet 301 is distributed along the tangential direction on the outer side of the first turbine housing 3. A guide slit 302 is provided inside the first turbine housing 3. A first exhaust port 303 is provided at the middle end of the first turbine housing 3 away from the connecting plate 2, and the impeller 14 is located inside the first exhaust port 303. A second exhaust port 401 is distributed along the tangential direction on the outer side of the second turbine housing 4. A second air inlet 402 is provided at the middle end of the second turbine housing 4 away from the connecting plate 2, and the impeller 14 is located inside the second air inlet 402.

[0032] After the first turbine housing 3 completes directional optimization through the adjustment structure of Embodiment 1, the first air inlet 301 distributed along the tangent on its outer side can more efficiently guide the external airflow into the housing. After the airflow is accelerated by the guide slot 302, it forms a vortex, which drives the impeller 14 located inside the first exhaust port 303 to rotate. The impeller 14 transmits power to another impeller 14 inside the second turbine housing 4 through the synchronous shaft 10.

[0033] The second air inlet 402 of the second turbine housing 4 generates a negative pressure effect when the impeller 14 rotates, forcing air to be drawn in from the center and discharged at high speed tangentially from the second exhaust port 401 on the outside.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" or "linked" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A negative pressure turbocharger housing, comprising an intermediate body (1), wherein connecting discs (2) are bolted to both sides of the intermediate body (1), and a first turbine housing (3) and a second turbine housing (4) are respectively mounted on the outer sides of the two connecting discs (2). Its features are: The first turbine housing (3) and the second turbine housing (4) are fixedly provided with symmetrically distributed threaded sleeves (5) on the side near the connecting plate (2), and three equally spaced threaded sleeves (5) are provided on both sides of the first turbine housing (3) and the second turbine housing (4) near the connecting plate (2). Connecting rings (6) are fixedly connected to both sides of the connecting plate (2). Connecting bolts (7) are threaded inside the threaded sleeves (5). The connecting bolts (7) pass through the connecting rings (6) and are screwed into the threaded sleeves (5).

2. The negative pressure turbocharger housing according to claim 1, characterized in that: A gasket (8) is fitted on the outside of the connecting bolt (7). The gasket (8) is located between the end of the connecting ring (6) and the connecting bolt (7). Two symmetrically distributed limiting strips (9) are fixedly connected to one side of the gasket (8). The limiting strips (9) are slidably connected to the inside of the connecting ring (6). Both sides of the gasket (8) are provided with anti-slip textures.

3. A negative pressure turbocharger housing according to claim 2, characterized in that: The intermediate body (1) is rotatably connected to a synchronous shaft (10). The two ends of the synchronous shaft (10) extend symmetrically to both sides of the intermediate body (1) and pass through the connecting plate (2) to the center of the first turbine housing (3) and the second turbine housing (4).

4. A negative pressure turbocharger housing according to claim 3, characterized in that: The end of the synchronous shaft (10) is provided with a connecting thread (11), a positioning sleeve (12) is fixedly connected to the outside of the synchronous shaft (10), and a fixing nut (13) is threadedly connected to the end of the synchronous shaft (10) through the connecting thread (11). An impeller (14) is slidably sleeved on the outside of the synchronous shaft (10). The impeller (14) is sandwiched between the positioning sleeve (12) and the fixing nut (13), and the two impellers (14) are located inside the first turbine housing (3) and the second turbine housing (4), respectively.

5. A negative pressure turbocharger housing according to claim 1, characterized in that: The connecting plate (2) has an installation hole (15) inside, and the synchronous shaft (10) passes through the installation hole (15). A bearing (16) is fixedly installed in the installation hole (15), and the bearing (16) is sleeved on the outside of the positioning sleeve (12).

6. A negative pressure turbocharger housing according to claim 1, characterized in that: The first turbine housing (3) has a first air inlet (301) distributed along the tangential direction on the outer side, and a guide slit (302) is provided inside the first turbine housing (3). The first exhaust port (303) is opened at the middle end of the first turbine housing (3) away from the connecting plate (2), and the impeller (14) is located inside the first exhaust port (303).

7. A negative pressure turbocharger housing according to claim 1, characterized in that: The second turbine housing (4) has a second exhaust port (401) distributed along the tangential direction on the outer side. The second turbine housing (4) has a second air inlet (402) at the middle end away from the connecting plate (2), and the impeller (14) is located inside the second air inlet (402).

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