Inverted volute and turbocharger applying same

Abstract

The utility model discloses an inverted volute and a turbocharger applying the same, and belongs to the technical field of engine accessories, the inverted volute comprises a volute body, a nozzle ring and a positioning sleeve used for fixing the nozzle ring, and the positioning sleeve is arranged at one end, opposite to a middle body, in the volute body; the positioning sleeve is connected with the inner wall of the volute body, and installation is convenient and fast; guide vanes of the nozzle ring abut against the inner wall of a flow channel release inlet of the volute body, and a main body ring of the nozzle ring is positioned on the inner wall of the volute body through a positioning structure of the positioning sleeve; the turbocharger provided with the volute is good in oil-saving and gas-saving effect and high in supercharging efficiency. The nozzle ring is installed from the end, away from the middle body, of the volute body through the positioning sleeve and fixed to the inner wall of the volute body through the positioning structure of the positioning sleeve, and the guide vanes of the nozzle ring correspond to the flow channel inlet of the volute body. According to the utility model, the nozzle ring is reversely arranged in the volute, so that the assembly process is simplified, and the manufacturing cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of engine parts technology, and in particular relates to an inverted turbine housing and a turbocharger using the turbine housing. Background Technology

[0002] A turbocharger uses exhaust gases from the engine to drive a turbine, which in turn drives a coaxial impeller. The impeller compresses the air supplied by the air filter and forces it into the cylinders. Currently, existing turbochargers require the nozzle rings to be installed into the turbine housing from the intermediate body direction. This necessitates redesigning the intermediate body to match the guide vanes, which increases manufacturing costs.

[0003] In view of this, technicians developed an inverted volute housing, which assembles the nozzle ring in the opposite direction to the original assembly, in order to solve the defects of the traditional nozzle ring assembly. Utility Model Content

[0004] The purpose of this invention is to provide an inverted volute housing and a turbocharger using the volute housing, aiming to solve the technical problems of time-consuming and labor-intensive assembly and high manufacturing cost of the nozzle ring being installed into the volute housing from the intermediate body direction in the prior art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] An inverted volute casing includes a volute casing body, a nozzle ring, and a positioning sleeve for fixing the nozzle ring. The positioning sleeve is disposed inside the volute casing body at the opposite end for mounting an intermediate body. The positioning sleeve is connected to the inner wall of the volute casing body. The guide vanes of the nozzle ring abut against the inner wall of the flow channel release inlet of the volute casing body. The main ring of the nozzle ring is positioned inside the volute casing body by the positioning structure of the positioning sleeve.

[0007] Preferably, the positioning sleeve has a through hole in the middle for airflow and is matched with the turbine. The positioning structure is an annular boss on the outer wall of the positioning sleeve. The inner end face of the annular boss abuts against the main body ring of the nozzle ring. The annular boss is connected to the inner wall of the vortex housing body.

[0008] Preferably, the annular boss is threadedly connected to the inner wall of the vortex shell body.

[0009] Preferably, an elastic washer is provided between the annular boss and the main ring of the nozzle ring.

[0010] Preferably, the inner opening of the positioning sleeve has a rounded transition to facilitate engagement with the turbine.

[0011] Preferably, there are several guide vanes, and a special-shaped vane is provided at the junction of the main body ring and the flow channel inlet. The special-shaped vane and several guide vanes are evenly distributed along the circumference of the main body ring of the nozzle ring. The special-shaped vane has an outward extension, and the outer edge of the extension has a guide slope. The guide slope is connected to the end of the bifurcation barrier of the flow channel inlet section.

[0012] Preferably, the outer wall of the main body of the nozzle ring is provided with positioning protrusions, and the inner wall of the vortex body is provided with positioning grooves that cooperate with the positioning protrusions.

[0013] This utility model also provides a turbocharger, including the above-mentioned inverted turbine housing.

[0014] Preferably, the orifice at one end of the vortex shell body that mates with the intermediate body is provided with a sealing groove, and the sealing groove can accommodate an elastic sealing ring.

[0015] Preferably, the sealing ring is made of metal, and the cross-section of the sealing ring is C-shaped or V-shaped, with the opening facing the center line of the inner hole.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] This invention utilizes a positioning sleeve to insert the nozzle ring from the end of the turbocharger housing away from the intermediate body, and fixes it to the inner wall of the turbocharger housing body with the positioning structure of the positioning sleeve, so that the guide vanes of the nozzle ring cooperate with the flow channel of the turbocharger housing body; at the same time, the positioning sleeve is movably connected to the inner wall of the turbocharger housing body, facilitating installation. By installing the nozzle ring in reverse inside the turbocharger housing, this invention eliminates the need to modify the intermediate body, the turbocharger core structure, and the corresponding accessory styles and dimensions, simplifying the assembly process and reducing manufacturing costs. Turbochargers equipped with this turbocharger housing utilize the nozzle ring to optimize the direction and flow of exhaust gas, improve turbine speed and boosting effect, and enhance fuel and gas savings. Attached Figure Description

[0018] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0019] In the attached diagram:

[0020] Figure 1 An external view of an inverted volute provided for an embodiment of this utility model;

[0021] Figure 2 for Figure 1 Longitudinal section of the inverted vortex shell;

[0022] Figure 3This is a schematic diagram of the assembly of the positioning sleeve and nozzle ring with the volute body in an embodiment of this utility model;

[0023] Figure 4 This is a schematic diagram of the cross-sectional structure of the guide vane and the vortex shell body in an embodiment of the present invention.

[0024] Figure 5 This is a cross-sectional view of the vortex shell body in another embodiment of the present invention;

[0025] In the picture:

[0026] 1-Vortex body, 10-Flow channel; 2-Positioning sleeve, 20-Annular boss, 21-Process groove; 3-Nozzle ring, 30-Guide slope, 31-Guide blade, 32-Main body ring, 33-Positioning protrusion; 4-Elastic washer; 5-Elastic sealing ring; 9-Bifurcation partition; 11-Exhaust gas inlet. Detailed Implementation

[0027] To make the technical problems, technical solutions, and beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. In the following detailed description of the invention, certain specific details are described in detail. However, those skilled in the art will fully understand the invention for any parts not described in detail.

[0028] Furthermore, those skilled in the art should understand that the accompanying drawings are provided only to illustrate the purpose, features, and advantages of the present invention, and are not actually drawn to scale.

[0029] Furthermore, unless the context explicitly requires it, the words "comprising," "including," and similar terms throughout the specification and claims should be interpreted as including rather than exclusive or exhaustive; that is, meaning "including but not limited to."

[0030] like Figure 1 , Figure 2 and Figure 3As shown, an embodiment of this utility model provides an inverted vortex housing comprising a vortex housing body 1, a nozzle ring 3, and a positioning sleeve 2 for fixing the nozzle ring 3. The positioning sleeve 2 is disposed inside the vortex housing body 1 at the opposite end for installing an intermediate body; the positioning sleeve 2 is connected to the inner wall of the vortex housing body 1; the guide vanes 31 of the nozzle ring 3 abut against the inner wall of the release inlet of the flow channel 10 inside the vortex housing body 1; and the main ring 32 of the nozzle ring 3 is fixed inside the vortex housing body 1 by the positioning structure of the positioning sleeve 2. In this scheme, during nozzle ring assembly, the positioning sleeve is used to insert the nozzle ring from the end of the vortex housing body away from the intermediate body, so that the guide vanes of the nozzle ring correspond to the annular exhaust gas release port of the flow channel inside the vortex housing body facing the center cavity of the vortex housing body, and is fixed to the inner wall of the vortex housing body by means of the positioning structure of the positioning sleeve. At the same time, the positioning sleeve is connected to the inner wall of the vortex housing body for easy installation.

[0031] In specific design, such as Figure 3 As shown, the positioning sleeve 2 has a through hole in the middle for airflow and is matched with the turbine. The positioning structure is an annular boss 20 on the outer wall of the positioning sleeve 2. The inner end face of the annular boss 20 abuts against the main body ring 32 of the nozzle ring 3. The outer circle of the annular boss 20 is threaded to the inner wall of the vortex body 1, or it can be connected by embedding or other detachable connection methods.

[0032] Further optimize the above structure, such as Figure 2 , 3 As shown, an adjusting washer 4 is provided between the annular boss 20 and the main body ring 32 of the nozzle ring 3. The adjusting washer 4 is a wave-shaped washer. The wave-shaped washer provides preload to the nozzle ring 3 mounted on the inner circumferential surface of the positioning sleeve 2, ensuring that the positioning sleeve 2 firmly fixes the nozzle ring 3 within the volute body 1.

[0033] like Figure 2 , 4 As shown, in order to cooperate with the turbine, the inner opening of the positioning sleeve 2 adopts a rounded transition. This arc-shaped surface is used to cooperate with the turbine, which facilitates the smooth passage of airflow.

[0034] In specific embodiments of this utility model, such as Figure 4 As shown, there are several guide vanes 31. A shaped vane is provided at the junction of the main body ring 32 and the inlet of the flow channel 10. The guide vanes 31 and the shaped vane are evenly distributed circumferentially along the main body ring 32 of the nozzle ring 3. The shaped vane has an outward extension, and a guide slope 30 is provided on the outer edge of the extension. The guide slope 30 is connected to the end of the bifurcation barrier 9 at the inlet section of the flow channel 10, which can isolate the incoming and outgoing exhaust gases. The use of the guide slope ensures that the exhaust gas enters the annular exhaust gas flow channel within the vortex body and is smoothly discharged through the guide vanes, preventing the exhaust gas from flowing back to the inlet section of the flow channel 10 at the end of the flow channel and disrupting the exhaust gas work in the next cycle.

[0035] As a preferred structure, such as Figure 3 As shown, the outer wall of the main body ring 32 of the nozzle ring 3 is provided with positioning protrusions 33, and the inner wall of the vortex body 1 is provided with positioning grooves that cooperate with the positioning protrusions 33. The positioning protrusions can be used to position the nozzle ring, ensuring the installation position of the irregular blades and further improving the assembly speed and accuracy.

[0036] When assembling the nozzle ring, force needs to be applied to the positioning sleeve. Two symmetrical process grooves 21 are pre-machined on the outer end face of the positioning sleeve 2. By using the positioning sleeve installation tool and the process groove, the positioning sleeve can be rotated to make it threaded into the inner wall of the volute body, and at the same time, the positioning sleeve is driven to apply axial force to the nozzle ring.

[0037] This utility model also provides a turbocharger, including the aforementioned inverted turbine housing. All turbochargers containing the aforementioned inverted turbine housing are within the protection scope of this utility model.

[0038] In practical applications, such as Figure 5 As shown, the end opening of the volute body 1 that mates with the intermediate body is provided with a sealing groove 5, which can accommodate an elastic sealing ring. In specific manufacturing, the sealing ring is made of metal, such as stainless steel; the cross-section of the sealing ring is C-shaped or V-shaped (available commercially). After the intermediate body is installed, the sealing ring is compressed; after the intermediate body is removed, the sealing ring will recover under the action of elasticity, and the recovered sealing ring will protrude from the end face of the volute body (meeting the assembly requirements of the intermediate body after compression). After the intermediate body is assembled in place at the end of the volute body, the elasticity of the sealing ring can achieve a good seal between the mating surfaces of the volute body and the intermediate body.

[0039] In summary, this invention has the advantages of simple structure and convenient and quick assembly. The nozzle ring is installed from the end of the vortex housing body away from the intermediate body using a positioning sleeve, aligning the guide vanes of the nozzle ring with the flow channel of the vortex housing body. The annular boss of the positioning sleeve is threadedly connected to the inner wall of the vortex housing body, thus fixing the nozzle ring in place. The other end of the vortex housing body uses an elastic sealing ring to achieve a seal between the mating surfaces and the intermediate body. This structure eliminates the need to modify the dimensions of the intermediate body, simplifying the assembly process and reducing manufacturing costs. Furthermore, a turbocharger equipped with this vortex housing utilizes the nozzle ring to optimize the direction and flow rate of exhaust gas, improving turbine speed and boosting effect, enhancing fuel efficiency and reducing harmful emissions.

[0040] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model 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 this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. An inverted volute casing, characterized in that: It includes a vortex housing body, a nozzle ring, and a positioning sleeve for fixing the nozzle ring. The positioning sleeve is disposed in the vortex housing body at the opposite end for installing an intermediate body. The positioning sleeve is connected to the inner wall of the vortex housing body. The guide vanes of the nozzle ring abut against the inner wall of the flow channel release inlet of the vortex housing body. The main ring of the nozzle ring is positioned in the vortex housing body by the positioning structure of the positioning sleeve.

2. The inverted volute casing according to claim 1, characterized in that: The positioning sleeve has a through hole in the middle for airflow and is matched with the turbine. The positioning structure is an annular boss on the outer wall of the positioning sleeve. The inner end face of the annular boss abuts against the main body ring of the nozzle ring. The annular boss is connected to the inner wall of the vortex housing body.

3. The inverted volute casing according to claim 2, characterized in that: The annular boss is threadedly connected to the inner wall of the vortex shell body.

4. The inverted volute casing according to claim 2, characterized in that: An elastic washer is provided between the annular boss and the main ring of the nozzle ring.

5. The inverted volute casing according to claim 1, characterized in that: The inner opening of the positioning sleeve has a rounded transition.

6. The inverted volute casing according to claim 1, characterized in that: The guide vanes are a plurality of those, and a special-shaped vane is provided at the junction of the main body ring and the flow channel inlet. The special-shaped vane and the plurality of guide vanes are evenly distributed along the circumference of the main body ring of the nozzle ring. The special-shaped vane is provided with an outward extension, and a guide slope is provided on the outer edge of the extension. The guide slope is connected to the end of the bifurcation barrier of the flow channel inlet section.

7. An inverted volute casing according to claim 6, characterized in that: The nozzle ring has a positioning protrusion on its outer wall and a positioning groove that mates with the positioning protrusion on its inner wall.

8. A turbocharger, characterized in that: Including the inverted volute as described in any one of claims 1-6.

9. A turbocharger according to claim 8, characterized in that: The vortex shell body and the intermediate body have a sealing groove at one end of the orifice, and the sealing groove can accommodate an elastic sealing ring.

10. A turbocharger according to claim 9, characterized in that: The sealing ring is made of metal, and its cross-section is C-shaped or V-shaped with the opening facing the center line of the inner hole.

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