Turbine bypass deflation device, turbine and turbocharger

Abstract

The invention provides a turbine bypass deflation device, a turbine and a turbocharger, the turbine bypass deflation device comprises a vent hole formed in a turbine shell and a mounting part arranged in the turbine shell, the mounting part is provided with an inner wall surface, and the turbine bypass deflation device further comprises a shaft sleeve assembly fixedly arranged on the mounting part, comprising a first shaft sleeve and a second shaft sleeve, the rotating butterfly valve is arranged on the mounting part and comprises a valve body and two rotating shafts, the valve body is fixedly connected with the two rotating shafts, the two rotating shafts are rotationally connected to the two rotating inner cavities respectively, the valve body is provided with an inner cavity, and the inner cavity, the inner wall surface and the vent hole are matched to form a deflation channel communicated with the turbine runner; the power mechanism is connected with the rotating shaft and used for driving the rotating butterfly valve to rotate through the rotating shaft so as to adjust the air displacement of the deflation channel. According to the turbocharger, the accuracy of bypass flow adjustment and opening adjustment is improved, the working stability of the turbocharger is improved, and the service life of moving parts such as a power mechanism is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of internal combustion engines, and more specifically, to a turbine bypass bleed device, a turbine, and a turbocharger. Background Art

[0002] For automotive engines, high-load bleed air regulation is often used to improve low-load performance. At high engine speeds, to limit boost pressure, peak burst pressure, and turbocharger speed to within permissible limits, some of the engine's exhaust or pressurized air is discharged through a bleed valve. This allows the turbocharger's compressor to operate close to the horizontal line during high-load conditions.

[0003] Currently, the most commonly used bleed air regulation measure relies on an exhaust gas bypass device installed at the turbine end of the supercharger. This not only improves the engine's low-speed torque, but also reduces the engine's exhaust smoke density, reduces air pollution, and also extends the engine's service life. At low and medium engine speeds, all exhaust gas from the engine enters the turbine to perform work. At high engine speeds, the exhaust gas bypass valve on the turbine housing opens, and some exhaust gas from the engine is directly discharged without passing through the turbine impeller to perform work, thereby controlling the boost pressure within a safe range.

[0004] Traditional turbocharger wastegates utilize a rotary valve structure. Its operating principle is as follows: a bleed valve is securely attached to a rocker arm, which is driven by a power mechanism to rotate about its axis, thereby opening and closing a bleed passageway located on the turbine housing. At low and medium engine speeds, the bleed valve is closed, allowing all exhaust gas to enter the turbine to perform work. At high engine speeds, the power mechanism rotates the rocker arm, opening the bleed valve and controlling its opening. Some exhaust gas is diverted through the bleed passageway to the volute outlet, achieving turbine-side bypass.

[0005] Currently, traditional rotary valves offer a simple structure and are easy to control. However, due to their poor flow characteristics, the flow rate exhibits a completely nonlinear relationship with valve opening within a narrow range of opening, while the flow rate remains largely unchanged with valve opening within a wide range of opening. Consequently, precise control of the bleed volume is impossible. Furthermore, the pressure on the valve cover before and after valve opening differs significantly. After the valve opens, the gas flow on both sides of the valve cover fluctuates dramatically, causing drastic pressure fluctuations on the valve cover. Since the valve opening is directly related to the pressure on the valve cover, this causes the valve cover to continuously swing after the valve opens. This swinging of the valve cover, in turn, leads to instabilities in the turbine inlet pressure and exhaust gas bypass volume, affecting the operational stability of the turbocharger and, ultimately, the engine. Furthermore, the constant swinging of the valve cover increases mechanical wear on the actuator and powertrain, reducing their lifespan and generating noise. Summary of the Invention

[0006] The present application provides a turbine bypass bleed device, a turbine and a turbocharger, which can accurately control the valve opening and the bypass bleed volume, improve the working stability of the turbocharger, reduce noise, and extend the service life of the turbocharger.

[0007] In a first aspect, the present application provides a turbine bypass bleed device, comprising a mounting portion disposed within a turbine housing, the mounting portion being provided with an inner wall surface, and the turbine housing being provided with an air vent; the turbine bypass bleed device further comprising: A shaft sleeve assembly is fixedly mounted on the mounting portion, the shaft sleeve assembly comprising a first shaft sleeve and a second shaft sleeve, wherein the first shaft sleeve and the second shaft sleeve are respectively provided with a rotating inner cavity; A rotary butterfly valve is provided on the mounting portion, the rotary butterfly valve comprising a valve body and two rotating shafts, the valve body being fixedly connected to the two rotating shafts, the two rotating shafts being rotatably connected to the two rotating inner cavities respectively, the valve body being provided with an inner chamber, the inner chamber, the inner wall surface and the vent hole cooperating to form an air release passage communicating with the turbine flow passage; A power mechanism is connected to the rotating shaft and is used to drive the rotary butterfly valve to rotate through the rotating shaft to adjust the exhaust volume of the exhaust channel.

[0008] In some embodiments, the turbine bypass bleed device also includes a valve seat, which is fixedly connected to the inside of the turbine housing. The valve seat is provided with the mounting portion, and the mounting portion includes two sleeve mounting portions and a valve body mounting portion. The first sleeve and the second sleeve are respectively fixedly connected to the two sleeve mounting portions, the valve body is provided on the valve body mounting portion, and the inner wall surface is provided on the valve body mounting portion.

[0009] In some embodiments, the clearance fit tolerance between the valve seat and the outer circle of the rotary butterfly valve is 0.05 mm to 0.2 mm.

[0010] In some embodiments, the valve body is provided with a valve plate, the valve plate includes a first valve wall surface extending along the first direction, the valve body also includes a second valve wall surface and a third valve wall surface arranged on both sides of the first valve wall surface along the first direction, and the first valve wall surface, the second valve wall surface and the third valve wall surface form the inner chamber.

[0011] In some embodiments, there are multiple inner chambers, which are evenly distributed along the circumference of the valve body.

[0012] In some embodiments, the two rotating shafts are respectively a first rotating shaft and a second rotating shaft, the first end of the first rotating shaft is fixedly connected to the valve body, the second end of the first rotating shaft is fixedly connected to the connecting shaft, and the first rotating shaft is fixedly connected to the power mechanism through the connecting shaft, and the second rotating shaft is arranged on the end face of the valve body away from the power mechanism, the first rotating shaft, the valve body and the second rotating shaft are coaxially distributed, and the length of the first rotating shaft is greater than the length of the second rotating shaft.

[0013] In some embodiments, the power mechanism includes a transmission assembly and a driving member, wherein the driving member is connected to the transmission assembly for providing driving force to the transmission assembly, and the transmission assembly is connected to the rotating shaft for transmitting driving force to the rotating shaft to drive the rotary butterfly valve to rotate.

[0014] In some embodiments, the transmission assembly includes a transmission rod and a mounting plate, the connecting shaft and the transmission rod are respectively fixedly connected to two ends of the mounting plate, and the transmission rod is externally connected to the driving end of the driving member.

[0015] In a second aspect, an embodiment of the present application further provides a turbine, comprising a turbine housing, a turbine, and a turbine bypass bleed device, wherein the turbine bypass bleed device is specifically the turbine bypass bleed device described in any one of the above items.

[0016] In a third aspect, an embodiment of the present application further provides a turbocharger comprising the turbine as described above.

[0017] In the embodiment of the present application, the valve cover structure is eliminated, and a vent hole is provided on the turbine housing at the turbine end of the supercharger and a mounting portion is provided inside the turbine housing. A rotary butterfly valve is rotatably connected to the mounting portion through a shaft sleeve assembly, and the rotary butterfly valve is connected to a power mechanism, and is connected to a drive device through the power mechanism. The inner chamber inside the valve body of the rotary butterfly valve cooperates with the inner wall surface of the mounting portion and the vent hole to form an air vent channel directly connected to the turbine flow channel. When the rotary butterfly valve is rotated under force, the flow area of ​​the bleed channel is directly changed by the change in the relative position of the valve body, the inner wall of the mounting part and the vent hole during the rotational motion. The bleed channel can be opened or closed smoothly, and the valve opening and the flow area of ​​the bleed channel can be evenly adjusted, so that the flow rate can be evenly changed, avoiding the current problem of sudden change of small valve opening and saturation of large opening, and avoiding the pressure on the rotary butterfly valve affecting the opening. The power mechanism can accurately determine the opening of the butterfly valve according to the operating conditions of the engine, thereby achieving precise control of the bypass bleed volume and boost pressure. At this time, the bypass bleed volume is only related to the exhaust pressure of the engine and the opening of the butterfly valve, thereby eliminating the influence of pressure fluctuations caused by the unsteady flow on both sides of the valve cover, and eliminating the influence of turbine inlet pressure fluctuations caused by the swing of the valve cover after the rotary valve is opened, avoiding wear of the power mechanism, eliminating abnormal noise caused by the swing of the valve cover, improving the stability of the turbine operation, and extending the service life of moving parts such as the power mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.

[0019] Figure 1 A schematic structural diagram of a turbine provided in some embodiments of the present application (the turbine is not shown); Figure 2 A schematic diagram of the structure of a rotary butterfly valve in an open state in a turbine bypass bleed device provided in some embodiments of the present application; Figure 3 A schematic structural diagram of a rotary butterfly valve in a closed state in a turbine bypass air bleed device provided in some embodiments of the present application; Figure 4 A schematic diagram of the assembly of a rotary butterfly valve, a sleeve assembly, and a transmission assembly in a turbine bypass bleed device provided in some embodiments of the present application; Figure 5 A schematic structural diagram of a rotary butterfly valve in a turbine bypass air bleed device provided in some embodiments of the present application.

[0020] The reference numerals are as follows: 10-turbine; 1-turbine housing; 2-shaft sleeve assembly; 3-rotating butterfly valve; 4-power mechanism; 5-valve seat; 11-mounting portion; 12-vent hole; 21-first shaft sleeve; 22-second shaft sleeve; 31-valve body; 32-first rotating shaft; 33-second rotating shaft; 311 - valve disc; 312 - inner chamber; 311a - first valve wall; 31a - second valve wall; 31b - third valve wall; 41 - transmission assembly; 411 - transmission rod; 412 - mounting plate; X - first direction. DETAILED DESCRIPTION

[0021] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0022] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in this application and in the specification are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. The terms "first" and "second" in this application are used to distinguish different objects, not to describe a specific order or a primary-secondary relationship.

[0023] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0024] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0025] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0026] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0027] The term "plurality" used in this application refers to two or more (including two).

[0028] Please refer to Figure 1 . The present application provides a turbine bypass bleed device, comprising a mounting portion 11 arranged inside a turbine shell 1, the mounting portion 11 being provided with an inner wall surface, the turbine shell 1 being provided with an air vent 12 at a position corresponding to the mounting portion 11, a shaft sleeve assembly 2 being fixedly mounted inside the mounting portion 11, the shaft sleeve assembly 2 comprising a first shaft sleeve 21 and a second shaft sleeve 22, the first shaft sleeve 21, the second shaft sleeve 22 and the mounting portion 11 being welded, connected with a locking member or interference fit to ensure the secure installation of the first shaft sleeve 21 and the second shaft sleeve 22. The first shaft sleeve 21 and the second shaft sleeve 22 are respectively provided with a rotating inner cavity. The rotary butterfly valve 3 is arranged on the mounting portion 11, comprising a valve body 31 and two rotating shafts, the valve body 31 being arranged between the two rotating shafts, the two rotating shafts being respectively fixed on both sides of the valve body 31, and the two rotating shafts being respectively rotatably mounted in the corresponding rotating inner cavities, the two shaft sleeves being used to fix and support the rotating shafts on both sides of the rotary butterfly valve 3, constraining the radial displacement of the rotating shafts and only allowing the rotating shafts to rotate along the axial direction, thereby eliminating the swing of the cantilever. The valve body 31 is provided with an inner chamber 312. The inner chamber 312, the inner wall surface of the turbine shell 1 and the air vent 12 of the turbine shell 1 cooperate to form a turbine flow channel. The turbine flow channel is directly connected to the bleed channel. The opening of the bleed channel is adjusted by rotating the valve body 31 and the valve state is switched by adjusting the rotation of the valve body 31, thereby realizing the connection or closure of the turbine flow channel and the adjustment of the valve opening in the connected state.

[0029] The power mechanism 4 transmits a rotational driving force to the rotary butterfly valve 3 , thereby driving the rotary butterfly valve 3 to rotate, thereby adjusting the exhaust volume of the exhaust passage.

[0030] The turbine bypass bleed device provided in this application has the following working principle: driven by the power mechanism 4, the rotary butterfly valve 3 rotates to achieve different position changes in the mounting portion 11, realizes the opening and closing of the bleed channel, and linearly adjusts the opening and closing size of the bleed channel. When the engine is in the low speed state, the rotary butterfly valve 3 turns to the bleed channel closed state, such as Figure 3 As shown, at this time, all the exhaust gas of the engine enters the turbine to do work. When the engine is in the middle and high speed state, the rotary butterfly valve 3 rotates to the state where the exhaust channel is open, as shown in FIG. Figure 2 Since the rotation angle of the rotary butterfly valve 3 is positively correlated with the area of ​​the channel opening, the flow area of ​​the rotary butterfly valve 3 changes linearly with the opening, so that the exhaust gas bypass volume is directly related to the valve opening. The valve body 31 uniformly changes the cross-sectional area of ​​the air flow channel when rotating, ensuring the accuracy and stability of flow regulation, thereby overcoming the defects of traditional rotary valves such as nonlinear flow at small openings and no flow change at large openings. In addition, the opening of the rotary butterfly valve 3 is directly controlled by the power mechanism 4, and the rotary butterfly valve 3 is fixed by a shaft sleeve and only rotates around the axis. It is not affected by the gas pressure fluctuations on both sides of the valve, thus avoiding the valve cover swing caused by the pressure difference of the traditional valve and the interference of pressure fluctuations on the opening. Since the rotary butterfly valve 3 is fixed in the mounting portion 11 inside the turbine housing 1, there is no swinging phenomenon, thereby eliminating the turbine inlet pressure fluctuations, mechanical wear and noise caused by the swing of the traditional valve, and improving the stability of the turbine bypass exhaust.

[0031] It should be noted that the first direction in the embodiment of the present application can be Figure 2 and Figure 3 The X direction is the axial direction.

[0032] In a specific embodiment, the turbine bypass bleed device also includes a valve seat 5, which is fixedly connected to the inside of the turbine shell 1. The valve seat 5 is provided with a mounting portion 11, and the mounting portion 11 includes two shaft sleeve mounting portions and a valve body mounting portion. The first shaft sleeve 21 and the second shaft sleeve 22 are respectively fixedly connected to the two shaft sleeve mounting portions, the valve body 31 is arranged on the valve body mounting portion, and the inner wall surface is arranged on the valve body mounting portion.

[0033] The valve seat 5 is fixedly connected to the interior of the turbine housing 1 and serves as the supporting foundation for the integral rotary butterfly valve 3. It provides stable structural support and ensures precise positioning of the valve body 31 and the sleeve. The valve seat 5 also optimizes the airflow path, reduces turbulence, and improves turbine efficiency. The valve seat 5 has a mounting portion 11, which includes two sleeve mounting portions and a valve body mounting portion. The inner wall of the valve body mounting portion is designed to mate with the valve body 31 to form a seal or airflow guide structure. The valve seat 5 is fixedly connected to the turbine housing 1. The two can be welded or connected using locking members, or the first and second sleeves 21 and 22 are fixed by the sleeve mounting portion. The valve body mounting portion is used to mount the valve body 31, ensuring a stable relative position between the valve body 31 and the valve seat 5. The sleeve mounting portion and the sleeve can be fixed by an interference fit or bolts. The valve body mounting portion and the valve body 31 are connected by a sliding or rotational fit. The first and second sleeves 21 and 22 support the valve stem or rotating shaft and are fixedly connected to the sleeve mounting portion of the valve seat 5 to ensure smooth movement. The valve body 31 is mounted on the valve body mounting portion and cooperates with the inner wall surface of the valve seat 5 to form an airtight air flow channel to reduce air leakage.

[0034] In this embodiment, the valve seat 5 is securely connected to the turbine housing 1, and the shaft sleeve and valve body 31 are precisely positioned, reducing vibration and providing a more stable and reliable structure. The shaft sleeve can be made of wear-resistant material to ensure its service life. This solution utilizes a combination of the valve seat 5, shaft sleeve, and valve body 31, facilitating disassembly and replacement of the rotary butterfly valve 3 and making maintenance more convenient.

[0035] Optionally, the outer circle of the valve disc 311 and the valve seat 5 adopt a precise clearance fit, and the clearance fit tolerance between the valve seat 5 and the outer circle of the rotary butterfly valve 3 is 0.05mm~0.2mm. Tests have shown that the clearance fit tolerance in this range can not only ensure the sealing when closing, but also avoid friction resistance interfering with the opening control, eliminate the hinge clearance of the traditional rocker arm structure, and avoid swinging.

[0036] refer to Figure 4 and Figure 5 In a specific embodiment of the valve body 31 , the valve body 31 is provided with a valve disc 311 , which includes a first valve wall surface 311 a extending along a first direction X. The valve body 31 includes a second valve wall surface 31 a and a third valve wall surface 31 b provided on both sides of the first valve wall surface 311 a along the first direction X. The first valve wall surface 311 a, the second valve wall surface 31 a, and the third valve wall surface 31 b form an inner chamber 312 .

[0037] The valve body 31 can be a cylindrical structure, and the valve disc 311 can be a flat valve disc 311, which is loosely matched with the valve seat 5 on the turbine housing 1. The first valve wall surface 311a of the valve disc 311 is a plane arranged along the first direction X, and the second valve wall surface 31a and the third valve wall surface 31b are also plane structures. The three valve walls form an open U-shaped inner chamber 312. When rotating, the flow area can be symmetrically changed to make the airflow evenly distributed and avoid asymmetric vortices. In addition, the inner chamber 312 formed by the valve disc 311 can be one or two, such as Figure 5 As shown, optionally, two inner chambers 312 are provided, with identical structures and symmetrically arranged. The inner chambers 312 communicate with the inner wall and the vent 12 during the rotation of the valve body 31. This enhances the sealing performance of the inner chamber 312 and reduces the risk of leakage, making it particularly suitable for high-pressure and corrosive fluids. Furthermore, the valve disc 311 can be independently removed and replaced, making it easy to adjust the size of the inner chamber 312.

[0038] There can be one or more inner chambers 312, optionally evenly distributed along the circumference of the valve body 31. This even distribution of inner chambers 312 provides symmetrical mass for the valve body 31, reducing vibration amplitude and sleeve wear during high-speed rotation. Furthermore, this even distribution of inner chambers 312 allows exhaust gas to enter the bypass channel symmetrically, avoiding pressure fluctuations caused by unilateral airflow impact and ensuring uniform airflow distribution.

[0039] In a specific embodiment, the turbine bypass bleed device adopts a dual-shaft design, specifically including a first shaft 32 and a second shaft 33. One end of the first shaft 32 is fixedly connected to the valve body 31, and the other end is fixedly connected to the power mechanism 4 through a connecting shaft. The first shaft 32 is relatively long, passes through the turbine housing 1 and extends to the outside, and is used to transmit driving force. The second shaft 33 is fixed to the end face of the other side of the valve body 31 away from the power mechanism 4. It is shorter and only plays a supporting role. The first shaft 32, the valve body 31 and the second shaft 33 are coaxially arranged to ensure that the rotation centers are consistent and avoid eccentric wear. The first shaft 32 is directly fixed to the power mechanism 4 through the connecting shaft, eliminating the transmission gap. Compared with the traditional rocker arm structure, it avoids the problems of looseness and lag at the hinge. The first rotating shaft 32 is long enough to pass through the turbine housing 1 and connect to the external power mechanism 4. Together, the first rotating shaft 32 and the second rotating shaft 33 constrain the valve body 31, forming a dual-pivot structure that resists unbalanced loads on the valve body 31 caused by fluctuating exhaust gas pressure, providing balanced support on both sides of the valve body 31. The short design of the second rotating shaft 33 reduces the overall inertia of the valve during rotation, improving dynamic response speed. The first rotating shaft 32, valve body 31, and second rotating shaft 33 are coaxially connected and machined in one piece or with precision alignment to ensure zero radial runout during rotation and prevent localized wear of the sleeve.

[0040] Therefore, in the embodiment of the present application, the dual-shaft structure with long-shaft drive and short-shaft support is used to achieve dual optimization of zero-gap power transmission and rotational stability. Its control accuracy, anti-swing ability and life are significantly better than the traditional single-sided rocker arm structure. It can reduce the turbine inlet pressure fluctuation and improve the smooth operation of the turbocharger. It is especially suitable for high-operating-condition turbochargers.

[0041] In a specific embodiment, the power mechanism 4 includes a transmission assembly 41 and a driving member (not shown in the figure). The driving member is connected to the transmission assembly 41 and is used to provide driving force to the transmission assembly 41. The transmission assembly 41 is connected to the rotating shaft and transmits driving force to the rotating shaft to drive the rotary butterfly valve 3 to rotate.

[0042] The two rotating shafts are a first rotating shaft 32 and a second rotating shaft 33. The first end of the first rotating shaft 32 is fixedly connected to the valve body 31, and the second end of the first rotating shaft 32 is fixedly connected to the connecting shaft. The rotating shaft is fixedly connected to the power mechanism 4 through the connecting shaft. The second rotating shaft 33 is arranged on the end face of the valve body 31 away from the power mechanism 4. The first rotating shaft 32, the valve body 31 and the second rotating shaft 33 are coaxially distributed, and the length of the first rotating shaft 32 is greater than the length of the second rotating shaft 33.

[0043] The drive element can be a motor, pneumatic or hydraulic cylinder, etc., to provide a stable and controllable driving force to meet the requirements of different working conditions. The motor can be a servo or stepper motor to achieve precise start and stop and angle adjustment, thereby improving the control performance of the rotary butterfly valve 3. The drive element is connected to the transmission assembly 41 to provide driving force.

[0044] The transmission assembly 41 can be a bleed valve, rocker assembly, gear set, pulley, coupling, etc. The input end of the transmission assembly 41 is connected to the driver to receive power, and the output end of the transmission assembly 41 is connected to the rotating shaft to drive the rotary butterfly valve 3 to rotate. The rotational power of the driver is transmitted to the rotary butterfly valve 3 directly or after a speed change. The cooperation between the driver and the transmission assembly 41 ensures efficient power conversion, reduces energy loss, and enables precise adjustment of the opening of the rotary butterfly valve 3.

[0045] like Figure 4 Optionally, the transmission assembly 41 includes a transmission rod 411 and a mounting plate 412. The connecting shaft is fixedly connected to the end of the mounting plate 412 facing the valve body 31. The transmission rod 411 is fixedly connected to the end of the mounting plate 412 facing the driving member and is connected to the driving end of the driving member. The transmission rod 411 is driven by the driving member to drive the mounting plate 412 and then the connecting shaft to rotate, providing driving force for the rotary butterfly valve 3 to achieve opening and closing of the air release channel and control of the opening and closing size.

[0046] In summary, the embodiment of the present application provides a turbine bypass bleed device, which uses a rotary butterfly valve 3 to open and close the bleed, so that the characteristic curve of the flow rate and the flow area of ​​the rotary butterfly valve 3 changes basically linearly, and the opening and flow area of ​​the rotary butterfly valve 3 are precisely controlled. Therefore, the exhaust gas bypass volume can be precisely controlled to achieve a good match between the supercharger and the engine. The opening of the rotary butterfly valve 3 in the embodiment of the present application is not affected by pressure, and its opening is completely controlled by the actuator, which avoids the constant change of the valve opening caused by pressure fluctuations on both sides of the valve cover due to unstable flow, thereby improving the working stability of the turbocharger and even the engine. In addition, the rotary butterfly valve 3 is limited to movement in the valve seat 5, and the phenomenon of the valve cover constantly swinging like a traditional valve will not occur, thereby avoiding abnormal wear of the transmission mechanism and the actuator, improving the service life of these components and eliminating abnormal noise caused by the swing of the valve cover. In addition, the present application has a simple structure and can be processed and produced using existing supercharger production technology and equipment. It achieves precise control of the turbocharger bypass bleed while maintaining low costs, effectively improves the working stability of the supercharger and the engine, and increases the service life of the supercharger. It can be applied to various types of turbochargers and has a wide range of applications.

[0047] Secondly, an embodiment of the present application provides a turbine 10, comprising a turbine bypass bleed device in any of the aforementioned embodiments. The turbine bypass bleed device enables the turbine 10 to operate smoothly and efficiently, while reducing noise and extending the service life of the turbine 10.

[0048] On the third aspect, an embodiment of the present application provides a turbocharger, including the aforementioned turbine 10, which has stable and reliable performance, low noise, good performance and long service life.

[0049] It should be noted that the turbine and turbocharger provided in the embodiments of the present application have the beneficial effects of the turbine bypass bleed device in any of the aforementioned embodiments. Please refer to the aforementioned description of the beneficial effects of the turbine bypass bleed device for details, and the embodiments of the present application will not be repeated.

[0050] The above describes in detail the turbine bypass bleed device, turbine, and turbocharger provided by this application. Specific examples are used herein to illustrate the principles and implementation methods of this application. The description of the above embodiments is intended only to facilitate understanding of the method and core concepts of this application. It should be noted that those skilled in the art may make various improvements and modifications to this application without departing from the principles of this application, and such improvements and modifications also fall within the scope of protection of this application.

Claims

1. A turbine bypass bleed device, characterized in that: The invention comprises a mounting portion (11) arranged inside a turbine housing (1), the mounting portion (11) being provided with an inner wall surface, and the turbine housing (1) being provided with an air vent (12); the turbine bypass air bleed device further comprising: A shaft sleeve assembly (2) is fixedly mounted on the mounting portion (11), the shaft sleeve assembly (2) comprising a first shaft sleeve (21) and a second shaft sleeve (22), the first shaft sleeve (21) and the second shaft sleeve (22) respectively being provided with a rotating inner cavity; A rotary butterfly valve (3) is provided on the mounting portion (11), the rotary butterfly valve (3) comprising a valve body (31) and two rotating shafts, the valve body (31) being fixedly connected to the two rotating shafts, the two rotating shafts being rotatably connected to the two rotating inner cavities respectively, the valve body (31) being provided with an inner chamber (312), the inner chamber (312), the inner wall surface and the vent hole (12) cooperating to form an air release channel connected to the turbine flow channel; A power mechanism (4) is connected to the rotating shaft and is used to drive the rotary butterfly valve (3) to rotate via the rotating shaft to adjust the exhaust volume of the exhaust channel.

2. The turbine bypass bleed device according to claim 1, characterized in that: The turbine bypass bleed device further comprises a valve seat (5), wherein the valve seat (5) is fixedly connected to the interior of the turbine housing (1), and the valve seat (5) is provided with the mounting portion (11), wherein the mounting portion (11) comprises two shaft sleeve mounting portions and a valve body mounting portion, wherein the first shaft sleeve (21) and the second shaft sleeve (22) are respectively fixedly connected to the two shaft sleeve mounting portions, the valve body (31) is arranged on the valve body mounting portion, and the inner wall surface is arranged on the valve body mounting portion.

3. The turbine bypass bleed device according to claim 2, characterized in that: The clearance fit tolerance between the valve seat (5) and the outer circle of the rotary butterfly valve (3) is 0.05 mm to 0.2 mm.

4. The turbine bypass air bleed device according to any one of claims 1 to 3, characterized in that: The valve body (31) is provided with a valve plate (311), and the valve plate (311) includes a first valve wall surface (311a) extending along a first direction. The valve body (31) also includes a second valve wall surface (31a) and a third valve wall surface (31b) arranged on both sides of the first valve wall surface (311a) along the first direction. The first valve wall surface (311a), the second valve wall surface (31a) and the third valve wall surface (31b) form the inner chamber (312).

5. The turbine bypass bleed device according to claim 4, characterized in that: There are multiple inner chambers (312) evenly distributed along the circumference of the valve body (31).

6. The turbine bypass bleed device according to claim 1, characterized in that: The two rotating shafts are respectively a first rotating shaft (32) and a second rotating shaft (33), wherein a first end of the first rotating shaft (32) is fixedly connected to the valve body (31), a second end of the first rotating shaft (32) is fixedly connected to a connecting shaft, and the first rotating shaft (32) is fixedly connected to the power mechanism (4) via the connecting shaft, and the second rotating shaft (33) is arranged on an end face of the valve body (31) away from the power mechanism (4), the first rotating shaft (32), the valve body (31) and the second rotating shaft (33) are coaxially distributed, and the length of the first rotating shaft (32) is greater than the length of the second rotating shaft (33).

7. The turbine bypass bleed device according to claim 6, characterized in that: The power mechanism (4) comprises a transmission assembly (41) and a driving member, wherein the driving member is connected to the transmission assembly (41) and is used to provide driving force to the transmission assembly (41), and the transmission assembly (41) is connected to the rotating shaft and is used to transmit driving force to the rotating shaft to drive the rotary butterfly valve (3) to rotate.

8. The turbine bypass bleed device according to claim 7, characterized in that: The transmission assembly (41) comprises a transmission rod (411) and a mounting plate (412), the connecting shaft and the transmission rod (411) are respectively fixedly connected to two ends of the mounting plate (412), and the transmission rod (411) is externally connected to the driving end of the driving member.

9. A turbine, characterized in that: It comprises a turbine housing (1), a turbine and a turbine bypass bleed device, wherein the turbine bypass bleed device is specifically the turbine bypass bleed device according to any one of claims 1 to 8.

10. A turbocharger, characterized in that: Comprising a turbine as claimed in claim 9 above.

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