Exhaust gas bypass valve structure and turbine housing of a turbocharger

Abstract

The utility model discloses a kind of exhaust gas bypass valve structure and turbine box of turbocharger, exhaust gas bypass valve structure is applied to turbine box of turbocharger, including air release door mechanism;Air release door mechanism, including air release door and adjusting ring;Air release door is located in the inside of annular adjusting ring;Air release door is set up with the original turbine box air release passage export of turbine box opposite corresponding;Air release door is used to open or close turbine box air release passage export;Adjusting ring is set with adjusting ring exhaust hole in radial direction direction;Adjusting ring exhaust hole is used to be communicated with turbine box air release passage export when air release door opens.

Description

Technical Field

[0001] This utility model relates to the field of fluid machinery turbocharger technology, and in particular to an exhaust bypass valve structure and a turbocharger turbine housing. Background Technology

[0002] A turbocharger is a device that uses exhaust gas energy to drive a turbine to rotate, thereby compressing intake air and increasing engine power output. The turbine housing is a key component of a turbocharger, which includes the compressor turbine and turbine shaft, while the exhaust bypass valve is used to control the flow of exhaust gas.

[0003] In existing technology, the exhaust gas bypass flow of a turbocharger is achieved by opening and closing an exhaust gas bypass valve in the turbine housing. The exhaust gas bypass valve opens when boost is not needed, allowing exhaust gas to bypass the turbocharger and reduce the load on the turbine shaft; while when boost is needed, the exhaust gas bypass valve closes, directing exhaust gas into the turbocharger to increase engine power output.

[0004] However, see Figures 1 to 4 For the turbine housing of a conventional turbocharger, it includes a turbine housing 1, on which a turbine impeller (not shown) is provided. The turbine housing 1 has a turbine housing vent outlet 101, and on the right side of the turbine housing vent outlet 101 is a vent valve 9. The vent valve 9 is connected to one end of the vent linkage crank 4 through a linkage pin 8.

[0005] The main problem with the exhaust bypass valve (including only the bleed valve 9) on the turbine housing of existing conventional turbochargers is that the opening and closing of the exhaust bypass valve (including only the bleed valve 9) is usually achieved through a matching mechanical actuator. Since the opening area of ​​the exhaust valve cannot be precisely controlled, it is easy to cause excessive loss of bypass airflow.

[0006] Therefore, there is an urgent need to develop a technology that can solve the above-mentioned technical problems. Utility Model Content

[0007] The purpose of this utility model is to address the technical deficiencies of the existing technology by providing an exhaust gas bypass valve structure and a turbine housing for a turbocharger.

[0008] Therefore, this utility model provides an exhaust gas bypass valve structure, which is applied to the turbine housing of a turbocharger, characterized in that it includes a bleed valve mechanism;

[0009] The bleed valve mechanism includes a bleed valve and an adjusting ring;

[0010] The bleed valve is located inside the annular adjusting ring;

[0011] The bleed valve is positioned to correspond precisely to the original turbine bleed channel outlet of the turbine housing.

[0012] The bleed valve is used to open or close the turbine housing bleed passage outlet.

[0013] The adjusting ring has an vent hole that runs through it in the radial direction;

[0014] The regulating ring exhaust port is used to connect with the turbine housing exhaust passage outlet when the bleed valve is open.

[0015] In addition, this utility model also provides a turbine housing for a turbocharger, including the exhaust bypass valve structure as described above.

[0016] As can be seen from the technical solution provided by this utility model above, compared with the prior art, this utility model provides an exhaust gas bypass valve structure and a turbocharger turbine housing. The design is scientific and can flexibly adjust the exhaust gas flow through the bleed valve mechanism (which includes the bleed valve and the regulating ring) without changing the overall structure of the exhaust gas bypass valve (i.e., the bleed valve), thereby improving the energy regulation performance of the turbocharger and effectively avoiding excessive loss of bypass airflow. It has significant practical significance for production.

[0017] It should be noted that, for this utility model, given that the cross-sectional area of ​​the exhaust bypass valve in the turbine housing of the blowout valve type turbocharger plays an important role in regulating the energy of the turbocharger turbine housing, this utility model, by installing annular adjustment rings (i.e., adjustment rings) with different flow areas on the outside of the blowout valve (i.e., the blowout valve 9), can regulate the exhaust gas flow rate through the blowout valve mechanism (which includes the blowout valve 9 and the adjustment ring 7) without changing the overall structure of the blowout valve (i.e., the blowout valve 9). The structure is scientific and effective. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a conventional wastegate type turbocharger;

[0019] Figure 2 This is a schematic diagram of the front structure of the turbine housing of a conventional wastegate type turbocharger (the wastegate crank, wastegate valve, and linkage pin are omitted in this diagram).

[0020] Figure 3 This is a cross-sectional view showing the positional relationship between the bleed valve (i.e., bleed valve) in the turbine housing of a conventional bleed valve type turbocharger and the outlet of the turbine housing bleed passage within the turbine housing when the bleed valve is in the closed state.

[0021] Figure 4This is a cross-sectional view showing the positional relationship between the bleed valve (i.e., bleed valve) in the turbine housing of a conventional bleed valve type turbocharger and the outlet of the turbine housing bleed passage within the turbine housing when the bleed valve is fully open.

[0022] Figure 5 A schematic diagram of the front structure of the turbine housing of a turbocharger (waste valve type turbocharger) matched and installed with an exhaust bypass valve structure provided by this utility model (this diagram omits the waste gas linkage crank, waste gas valve and linkage pin).

[0023] Figure 6 A schematic diagram of the front structure of an exhaust bypass valve structure provided by this utility model when it is installed on the turbine housing of a turbocharger (exhaust valve type turbocharger);

[0024] Figure 7 A cross-sectional view showing the positional relationship between the vent valve (i.e., vent gate) in the exhaust bypass valve structure provided by this utility model and the turbine box vent channel outlet in the turbine box when the valve is in the closed state.

[0025] Figure 8 A cross-sectional view showing the positional relationship between the vent valve (i.e., vent gate) in the exhaust bypass valve structure provided by this utility model and the turbine box vent channel outlet in the turbine box when the valve is in the fully open state.

[0026] Figure 9 This is a longitudinal sectional view of the adjusting ring;

[0027] Figure 10 This is a front sectional view of Embodiment 1 of the adjusting ring;

[0028] Figure 11 This is a front sectional view of Embodiment 2 of the adjusting ring;

[0029] Figure 12 This is a front sectional view of Embodiment 3 of the adjusting ring;

[0030] In the diagram, 1 is the turbine housing, 2 is the turbine impeller, 3 is the fastening bolt, 4 is the venting linkage crank, and 5 is the bushing.

[0031] 6 is the venting linkage shaft assembly, 7 is the adjusting ring, 8 is the linkage pin, and 9 is the venting valve;

[0032] 101 is the turbine housing vent outlet, 102 is the bushing mounting hole, 103 is the fastening bolt mounting hole, and 104 is the adjusting ring mounting groove.

[0033] 701 is the connecting bracket for the upper and lower rings of the adjusting ring, and 702 is the vent hole for the adjusting ring;

[0034] Where D is the outlet diameter of the turbine box venting channel outlet 101, and A1 is the maximum opening gap of the existing conventional venting valve.

[0035] A2 is the maximum adjustable gap for opening the exhaust gas on the regulating ring 7;

[0036] α is the single opening angle of the vent hole 702 of the adjustment ring;

[0037] B is the diameter of the vent hole of the adjusting ring 7, and N is the number of holes in the adjusting ring 7. Detailed Implementation

[0038] 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.

[0039] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0040] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0042] The technical solution of this utility model will be further described below through specific embodiments. Details not specified in the embodiments are all conventional technologies in the industry.

[0043] See Figures 5 to 12 This utility model provides an exhaust bypass valve structure, which is applied to the turbine housing 1 of a turbocharger (exhaust valve type turbocharger). The structure includes an exhaust valve mechanism.

[0044] The bleed valve mechanism includes a bleed valve 9 and an adjusting ring 7;

[0045] The vent valve 9 is located inside the annular adjusting ring 7;

[0046] The vent valve 9 is positioned directly opposite the original turbine vent passage outlet 101 of the turbine housing 1 (for example, located directly in front of the turbine vent passage outlet 101);

[0047] The vent valve 9 is used to open or close the turbine housing vent passage outlet 101;

[0048] The adjusting ring 7 has an adjusting ring vent hole 702 that extends through it in the radial direction;

[0049] The regulating ring exhaust port 702 is used to connect with the turbine box exhaust passage outlet 101 when the exhaust valve 9 is open.

[0050] In this invention, specifically, the outlet of the regulating ring vent 702, located away from the vent valve 9, is connected to the external atmospheric environment.

[0051] In this utility model, specifically, the adjusting ring 7 includes an annular adjusting ring connecting bracket 701;

[0052] Multiple adjustment ring vent holes 702 are provided radially through the adjustment ring connecting bracket 701.

[0053] In practice, multiple adjustment ring vent holes 702 are provided radially through the longitudinal center of the adjustment ring connecting bracket 701.

[0054] In specific implementation, for this utility model, in order to install the adjusting ring 7, the structure of the turbine housing 1 has been modified accordingly, as follows:

[0055] The front side of the turbine housing 1 is provided with a concave (i.e. rearwardly recessed) adjustment ring mounting groove 104 around the outer side of the turbine housing vent outlet 101.

[0056] The rear end of the adjusting ring connecting bracket 701 of the adjusting ring 7 is embedded in the adjusting ring mounting groove 104;

[0057] It should be noted that the adjustment ring vent 702, located in the longitudinal middle of the adjustment ring connecting bracket 701, is not provided in the adjustment ring mounting groove 104.

[0058] Furthermore, the distribution shape of the adjusting ring mounting groove 104 is circular;

[0059] Furthermore, on the front side of the turbine housing 1, three horizontally distributed fastening bolts 3 are evenly arranged on the outer side of the adjusting ring mounting groove 104.

[0060] The rear side of the nuts (only part of the nuts) at the front end of the three fastening bolts 3 is used to press the adjusting ring connecting bracket 701 of the adjusting ring 7 backward, that is, to abut against the adjusting ring connecting bracket 701 of the adjusting ring 7.

[0061] Furthermore, the front housing of the turbine housing 1 has three fastening bolt mounting holes 103 (which are longitudinally distributed) evenly (i.e. equally spaced) on the outer side of the adjusting ring mounting groove 104.

[0062] Each fastening bolt mounting hole 103 is threadedly fixed to the screw of a fastening bolt 3.

[0063] It should be noted that, in this utility model, the adjusting ring 7 is fixed in the adjusting ring mounting groove 104 by the fastening bolt 3, so that the adjusting ring 7 is fixed on the circumferential outer side of the turbine box venting channel outlet 101.

[0064] It should be noted that the number of fastening bolts 3 is not less than 3, and the installation positions of the fastening bolts 3 can be evenly distributed or non-uniformly distributed.

[0065] In this utility model, specifically, the center of the vent valve 9 is connected to one end of the vent linkage crank 4 via a linkage pin 8.

[0066] It should be noted that the vent valve 9 is used to expose the turbine box vent passage outlet 101 when it is open, and to cover the turbine box vent passage outlet 101 when it is closed, thereby closing the turbine box vent passage outlet 101.

[0067] It should be noted that the connection structure between the wastegate 9 and the wastegate crank 4 via the linkage pin 8 is a standard design of the turbine housing in conventional wastegate turbochargers. This is a mature and widely used design for conventional wastegate turbocharger turbine housings, and is common knowledge to those skilled in the art, so it will not be elaborated further here. This design allows the wastegate 9 to be opened and closed. Specifically, it allows the wastegate 9 to move forward to expose the turbine housing wastegate outlet 101, and it also allows the wastegate 9 to move backward to completely cover the turbine housing wastegate outlet 101, thus closing it.

[0068] In specific implementation, the turbine housing 1 of the turbocharger is provided with a bushing mounting hole 102 below the turbine housing exhaust passage outlet 101;

[0069] A hollow bushing 5 is provided on the bushing mounting hole 102;

[0070] The other end of the bleed linkage crank 4 passes through the central through hole of the bushing 5 and is connected to one end of the bleed linkage shaft assembly 6.

[0071] It should be noted that the connection structure design between the blowout linkage crank 4 and the blowout linkage shaft assembly 6 is the original structure design of the turbine box of the existing conventional blowout valve type turbocharger. It is the conventional design of the turbine box of the conventional blowout valve type turbocharger, which is a mature technology and has been widely used. It is common knowledge to those skilled in the art and will not be described in detail here.

[0072] Furthermore, the bushing mounting hole 102 and the venting linkage crank 4 are clearance fit.

[0073] It should be noted that, for this utility model, the bushing 5 is fixed on the bushing mounting hole 102 of the turbine housing 1 and forms a rotatable venting valve assembly with clearance fit with the venting linkage crank 4. The venting valve 9 is fixed on the venting linkage crank 4 by the linkage pin 8. The venting valve 9 and the adjusting ring 7 together form a venting valve mechanism with adjustable venting flow rate and are correspondingly set with the turbine housing venting channel outlet 101. Therefore, precise control of the exhaust flow rate (i.e., the exhaust gas flow rate flowing out from the turbine housing exhaust channel outlet 101) can be achieved, avoiding excessive loss of bypass airflow. If it is necessary to increase or decrease the bypass airflow, the flow area can be adjusted by replacing the regulating ring 7 with a different flow area (i.e., the flow area is equal to the sum of the flow areas of all the regulating ring exhaust holes 702). The flow area can be adjusted by adjusting the orifice size of the regulating ring exhaust holes 702 and the number of regulating ring exhaust holes 702, thus achieving precise control of the bypass airflow, which in turn achieves precise control of the exhaust flow rate (i.e., the exhaust gas flow rate flowing out from the turbine housing exhaust channel outlet 101).

[0074] In practice, an appropriate regulating ring 7 can be selected according to the needs of different applications, and its flow area can be adjusted to regulate the flow rate of exhaust gas flowing out through the exhaust valve mechanism (which includes the exhaust valve 9 and the regulating ring 7).

[0075] It should be noted that the opening area of ​​the vent valve (i.e., vent valve 9) in the prior art is S, where S = π × D × A1;

[0076] Where D is the outlet diameter of the turbine box venting channel outlet 101, and A1 is the maximum clearance of the existing conventional venting valve (i.e., venting valve 9) when it is open.

[0077] The opening area of ​​the venting valve mechanism of this utility model (which includes a venting valve 9 and an adjusting ring 7) is S*, where S* = α × B / 2 × N × A2.

[0078] Wherein, A2 is the maximum gap for adjustable exhaust gas opening on the regulating ring 7, which is equal to the longitudinal width of the exhaust port 702 of the regulating ring;

[0079] α is the single opening angle of the vent hole 702 of the adjustment ring;

[0080] B is the diameter of the vent hole (i.e., the central through hole) of the regulating ring 7;

[0081] N represents the number of openings on the adjusting ring 7 (i.e., the number of vent holes 702 on the adjusting ring).

[0082] It should be noted that, for the specific implementation of this utility model, please refer to [link / reference needed]. Figures 9 to 12 As shown, by adjusting the single opening angle α of the regulating ring exhaust hole 702, the diameter B of the vent hole (i.e., the central through hole) of the regulating ring 7, and the number N of openings on the regulating ring 7 (i.e., the number N of the regulating ring exhaust holes 702), a wide range of adjustment of the turbine box bypass venting energy can be achieved.

[0083] In summary, based on the technical solution provided by this utility model, the energy of the turbocharger's turbine box can be flexibly adjusted without changing the overall structure of the bleed valve (i.e., bleed valve 9, which is also an existing component on the conventional turbine box). This adjustment scheme is structurally reasonable and effective, and is easy to implement and control.

[0084] Therefore, the exhaust bypass valve structure provided by this utility model is an exhaust bypass door structure for a turbocharger turbine box, which realizes flexible adjustment of the turbocharger turbine box energy by installing annular adjustment rings (i.e., adjustment rings 7) with different flow areas on the outside of the exhaust valve (i.e., exhaust valve 9).

[0085] It should be noted that this utility model has made an adaptive modification to the existing conventional exhaust gas bypass valve structure (i.e., vent valve mechanism). By machining the adjustment ring mounting groove 104 on the turbine box 1 and installing the fastening bolt 3 and adjustment ring 7, the structure of the existing conventional vent valve mechanism is modified, thereby realizing the ability to regulate the exhaust gas flow rate through the vent valve mechanism (which includes the vent valve 9 and the adjustment ring 7) without changing the vent valve (i.e., vent valve 9).

[0086] Compared with the prior art, the waste gas bypass valve structure provided by this utility model has the following beneficial effects:

[0087] 1. This utility model can adjust the flow rate of exhaust gas without changing the overall structure of the exhaust valve (i.e., exhaust valve 9), making the structure simpler and more effective. The design and manufacture of the annular adjustment ring are relatively simple and easy to implement.

[0088] 2. This utility model achieves precise adjustment of exhaust gas flow by installing annular adjustment rings (i.e., adjustment rings 7) with different flow areas outside the exhaust valve (i.e., exhaust valve 9), thereby improving the performance and efficiency of the turbocharger.

[0089] 3. By applying the technical solution of this utility model, the structural modification of the existing conventional venting valve mechanism for precise bypass flow control is relatively simple, low-cost, and easy to implement.

[0090] 4. This utility model can quickly achieve the adjustment and control of bypass venting volume when performing performance matching.

[0091] In specific implementation, this invention adjusts the flow rate of exhaust gas flowing outward through the venting valve mechanism (which includes the venting valve 9 and the adjusting ring 7) by installing annular adjusting rings (i.e., adjusting rings 7) with different flow areas outside the venting valve (i.e., venting gate 9). The specific operating steps are as follows:

[0092] The first step is to design the position for installing the adjusting ring 7 outside the vent valve hole of the turbine housing (i.e., the vent outlet 101 of the turbine housing), that is, to design the adjusting ring mounting groove 104.

[0093] The second step is to select adjustment rings 7 with different flow areas. For example, adjustment rings 7 with different vent hole (i.e., central through hole) diameters can be designed.

[0094] The third step is to install the selected adjusting ring 7 on the adjusting ring mounting groove 104 outside the turbine box venting channel outlet 101.

[0095] The fourth step is to ensure a reliable seal between the adjusting ring 7 and the external interface (i.e., the adjusting ring mounting groove 104) of the turbine housing venting channel outlet 101 through structural design. It should be noted that, for this utility model, the adjusting ring 7 and the turbine housing (i.e., the adjusting ring mounting groove 104) are made of different materials. The two heat-resistant materials have different coefficients of thermal expansion. The coefficient of thermal expansion of the adjusting ring 7 is greater than that of the turbine housing 1 material (specifically, the material at the adjusting ring mounting groove 104). One end of the adjusting ring 7 is located in the adjusting ring mounting groove 104. Under high-temperature operating conditions, the expansion deformation of the adjusting ring 7 material is greater than that of the turbine housing material, so that the two fit tightly together and achieve a sealed fit.

[0096] The fifth step is to flexibly adjust the flow rate of the exhaust gas by replacing the regulating ring 7 with one of different flow areas.

[0097] Therefore, in this invention, by designing and installing adjusting rings 7 with different flow areas outside the vent valve hole of the turbine housing (i.e., the vent channel outlet 101 of the turbine housing), the flow rate of exhaust gas passing through the vent valve can be effectively adjusted. This adjustment method is simple and effective, does not require changing the overall structure of the vent valve, and improves the flexibility and convenience of adjustment.

[0098] Furthermore, the cross-sectional area plays a crucial role in regulating the energy output of the turbocharger's turbine housing. This invention precisely controls the flow rate of the exhaust gas from the turbine housing by adjusting the flow area of ​​the annular regulating ring (i.e., regulating ring 7), thereby regulating the turbocharger's energy output. This adjustment method is more precise and can meet the needs of different operating conditions.

[0099] This invention features a simple structure, requiring no complex modifications to the vent valve (i.e., vent gate 9), thus reducing production costs. Furthermore, the installation and adjustment of the regulating ring 7 are relatively simple, facilitating implementation and maintenance.

[0100] In summary, compared with the prior art, the technical solution of this utility model has advantages such as adjustable turbine flow, high flexibility in flow regulation, simple overall structure, and low cost.

[0101] Based on the exhaust gas bypass valve structure provided by the present invention, the present invention also provides a turbine housing for a turbocharger, which includes the exhaust gas bypass valve structure as described above.

[0102] In practice, a turbine impeller 2 is installed on the turbine housing 1;

[0103] It should be noted that the mounting structure of the turbine impeller 2 on the turbine housing 1 is a conventional existing structural design, which will not be described in detail here.

[0104] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An exhaust gas bypass valve structure, applied to the turbine housing (1) of a turbocharger, characterized in that, Including the bleed valve mechanism; The bleed valve mechanism includes a bleed valve (9) and an adjusting ring (7); The vent valve (9) is located inside the annular adjusting ring (7); The vent valve (9) is set to correspond to the original turbine vent channel outlet (101) of the turbine housing (1); The vent valve (9) is used to open or close the turbine housing vent passage outlet (101); The adjusting ring (7) has an adjusting ring vent hole (702) that extends through it in the radial direction; The regulating ring exhaust port (702) is used to connect with the turbine box exhaust passage outlet (101) when the exhaust valve (9) is open.

2. The waste gas bypass valve structure as described in claim 1, characterized in that, The vent valve (9) is located directly in front of the original turbine vent channel outlet (101) of the turbine housing (1).

3. The waste gas bypass valve structure as described in claim 1 or 2, characterized in that, The vent hole (702) of the regulating ring is located away from the vent valve (9) and is connected to the external atmospheric environment.

4. The waste gas bypass valve structure as described in any one of claims 1 to 3, characterized in that, Adjusting ring (7), including an annular adjusting ring connecting bracket (701); Multiple adjustment ring vent holes (702) are provided radially through the adjustment ring connecting bracket (701).

5. The waste gas bypass valve structure as described in claim 4, characterized in that, Multiple adjustment ring vent holes (702) are provided radially through the longitudinal center of the adjustment ring connecting bracket (701).

6. The waste gas bypass valve structure as described in claim 4, characterized in that, The front side of the turbine housing (1) is provided with a recessed adjustment ring mounting groove (104) around the outside of the turbine housing venting channel outlet (101); The rear end of the adjusting ring connecting bracket (701) of the adjusting ring (7) is embedded in the adjusting ring mounting groove (104).

7. The waste gas bypass valve structure as described in claim 6, characterized in that, Three horizontally distributed fastening bolts (3) are evenly arranged on the outer side of the adjusting ring mounting groove (104) on the front side of the turbine box (1); The rear side of the nut at the front end of the three fastening bolts (3) is used to press the adjusting ring (701) of the adjusting ring (7) backward.

8. The waste gas bypass valve structure as described in claim 7, characterized in that, The distribution shape of the adjustment ring mounting groove (104) is circular.

9. The waste gas bypass valve structure as described in claim 7, characterized in that, The front side of the turbine housing (1) has three fastening bolt mounting holes (103) evenly arranged on the outer side of the adjusting ring mounting groove (104); Each fastening bolt mounting hole (103) is threadedly fixed to the screw of a fastening bolt (3).

10. A turbine housing for a turbocharger, characterized in that, It includes the waste gas bypass valve structure as described in any one of claims 1 to 9.

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