Improved turbocharger housing structure
By integrating a muffler structure into the exhaust pipe of the turbocharger casing, the problem of limited space for existing turbocharger mufflers is solved, achieving a highly efficient noise reduction effect, improving the overall vehicle quietness and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO BEILUN LINDA AUTO PARTS MANUFACTURING CO LTD
- Filing Date
- 2025-07-24
- Publication Date
- 2026-06-19
AI Technical Summary
Existing turbocharger muffler designs are typically external, which limits space, results in unsatisfactory noise reduction, and is costly, failing to meet the overall vehicle quietness requirements.
A muffler structure, including multiple muffler sections and annular baffles, is integrated into the exhaust pipe of the turbocharger housing. It is fixed by sealing rings and connecting ribs to form a muffler assembly, which directly reduces noise at the source.
Without taking up extra space, it achieves good noise reduction, reduces noise levels, improves the overall sound quality of the vehicle, and reduces costs.
Smart Images
Figure CN224379958U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of turbocharger noise treatment technology, specifically relating to an improved turbocharger housing structure. Background Technology
[0002] Turbochargers are an important component of modern automotive engine systems. They allow more air to enter the cylinders, mixing more thoroughly with the fuel for combustion, which can significantly improve engine power and torque, as well as help improve fuel economy and reduce emissions.
[0003] At the same time, customers have increasingly higher requirements for the quietness of the vehicle. As an important component of the intake and exhaust system, the turbocharger will generate different types of structural noise and air noise. Therefore, noise reduction measures are needed to deal with market complaints in order to improve customer satisfaction and the overall reputation of the vehicle.
[0004] Currently, most mufflers on the market designed to reduce post-charger noise are external, meaning they are connected to the post-charger piping. However, due to limitations in the engine compartment layout, the connection method between the piping and the muffler, and the installation location, they often fail to achieve the desired noise reduction effect and are also relatively expensive.
[0005] Based on the above situation, this application has conducted further research on the pressure shell integrated sound-absorbing structure. Utility Model Content
[0006] To address the shortcomings of the existing technology, this utility model provides an improved turbocharger housing structure that integrates a noise reduction structure, does not occupy additional space, is easy to install, has a good noise reduction effect, and is low in cost. It can effectively solve market problems and improve the overall vehicle sound quality without affecting the performance of the turbocharger.
[0007] The present invention is solved by the following technical solution.
[0008] An improved turbocharger casing structure includes a silencing structure installed on the exhaust pipe of the casing. The portion of the silencing structure inserted into the exhaust pipe forms the silencing structure core, which comprises a first silencing section, a second silencing section, and a third silencing section. Each of the first, second, and third silencing sections has several through holes. A first annular partition is provided between the first and second silencing sections, and a second annular partition is provided between the second and third silencing sections. The outer periphery of the first annular partition is sealed to the inner wall of the exhaust pipe of the casing. A gap exists between the outer periphery of the second annular partition and the inner wall of the exhaust pipe of the casing. The silencing structure is sealed to the outlet of the exhaust pipe.
[0009] Preferably, the first silencing section has a plurality of first through holes arranged in a ring on its pipe wall, the second silencing section has a plurality of second through holes arranged in two rings on its pipe wall, and the third silencing section has a plurality of third through holes arranged in four rings on its pipe wall.
[0010] Preferably, the first annular partition is sealed to the inner wall of the tube at the air outlet of the pressure shell by a sealing ring.
[0011] Preferably, the silencing structure is provided with an assembly plate for mounting at the outlet of the air outlet pipe. The inner side of the assembly plate extends into a sealing platform with an annular structure. The sealing platform is sealed to the inner wall of the pipe body at the air outlet of the pressure shell by a sealing ring.
[0012] Preferably, a number of connecting ribs are provided between the sealing platform and the inner core of the sound-absorbing structure.
[0013] Preferably, the assembly plate is provided with bolt holes, and the air outlet of the pressure shell is provided with matching screw holes.
[0014] Preferably, a bushing is provided on the inner wall of the bolt hole.
[0015] Preferably, the length ratio of the first silencing segment, the second silencing segment, and the third silencing segment is 1.3~1.5:1:2.6~2.8.
[0016] Preferably, the ratio of the inner diameter of the inner core of the silencing structure to the inner diameter of the tube at the air outlet of the pressure shell is 0.55 to 0.65.
[0017] Compared with the prior art, the present invention has the following beneficial effects: it provides an improved turbocharger housing structure that integrates a noise reduction structure, does not occupy additional space, is easy to install, has a good noise reduction effect, and is low in cost. It can effectively solve market problems and improve the overall vehicle sound quality without affecting the performance of the turbocharger. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the noise reduction structure in this utility model.
[0019] Figure 2 This is a cross-sectional view of the noise reduction structure in this utility model.
[0020] Figure 3 The three-dimensional sound-absorbing structure in this utility model Figure 1 .
[0021] Figure 4 The three-dimensional structure of the silencer in this utility model Figure 2 .
[0022] Figure 5This is a schematic diagram of the assembly of the sound-absorbing structure and the pressure shell in this utility model. Detailed Implementation
[0023] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0024] In the following embodiments, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.
[0025] In the description of this utility model, it should be understood that the terms such as center, longitudinal, transverse, length, width, thickness, upper, lower, front, back, left, right, vertical, horizontal, top, bottom, inner, outer, clockwise, and counterclockwise, indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description; therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., 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 shown. In the description of this utility model, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," etc., should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0026] See Figures 1 to 5 This application relates to an improved turbocharger housing structure. The housing is a turbocharger housing, and its innovation lies in the fact that a muffler structure is installed on the exhaust pipe of the housing. The portion of the muffler structure inserted into the exhaust pipe is the muffler structure inner core 1. The diameter of the muffler structure inner core 1 is smaller than the inner diameter of the pipe body at the exhaust port of the housing. The muffler structure inner core 1 includes: a first muffler section 11, a second muffler section 12, and a third muffler section 13; the first muffler section 11, the second muffler section 12, and the third muffler section 13... Section 12 and the third silencing section 13 are each provided with several through holes; a first annular partition 111 is provided between the first silencing section 11 and the second silencing section 12, and a second annular partition 121 is provided between the second silencing section 12 and the third silencing section 13; the outer periphery of the first annular partition 111 is sealed with the inner wall of the air outlet pipe of the pressure shell; there is a gap between the outer periphery of the second annular partition 121 and the inner wall of the air outlet pipe of the pressure shell; the silencing structure is sealed with the outlet of the air outlet pipe.
[0027] Specifically, in the embodiments of this application, the first silencing section 11 has a plurality of first through holes 41 arranged in a ring on its pipe wall, the second silencing section 12 has a plurality of second through holes 42 arranged in two rings on its pipe wall, and the third silencing section 13 has a plurality of third through holes 43 arranged in four rings on its pipe wall. Furthermore, the diameter of the first through holes 41 is larger than the diameters of the second through holes 42 and the third through holes 43. The first annular partition 111 is sealed to the inner wall of the pipe body at the air outlet of the pressure shell by a sealing ring.
[0028] As shown in the accompanying drawings, in this application, the silencing structure is provided with an assembly plate 2 for mounting at the outlet of the air outlet pipe. An annular sealing platform 131 extends from the inner side of the assembly plate 2. This sealing platform 131 is sealed to the inner wall of the pipe at the air outlet of the pressure shell by a sealing ring. Several connecting ribs 132 are provided between the sealing platform 131 and the inner core 1 of the silencing structure to ensure structural strength. The assembly plate 2 is provided with bolt holes 25, and the air outlet of the pressure shell is provided with matching bolt holes. Furthermore, a bushing is provided on the inner wall of the bolt holes 25 to increase torque and prevent stress deformation of the inner core tube of the silencing structure.
[0029] In addition, in this application, the outer side of the assembly plate 2 is provided with an outlet channel 3, and the inner wall of the outlet channel 3 is provided with a metal bushing 35 to prevent deformation when connected to the pipeline, resulting in high overall structural strength.
[0030] From the appendix Figure 2 As can be seen from the diagram, in this embodiment, the length ratio L1:L2:L3 of the first silencing section 11, the second silencing section 12, and the third silencing section 13 is 1.3~1.5:1:2.6~2.8. The ratio of the inner diameter D1 of the inner core 1 of the silencing structure to the inner diameter D2 of the pipe at the air outlet of the pressure shell is 0.55~0.65.
[0031] The technical solution in this application includes three muffler sections with different volumes, through hole sizes and numbers, which are combined with multiple baffles, sealing rings and other structures to form a whole, which is inserted into the pressure shell of the turbocharger to form a muffler assembly.
[0032] Specifically, the first silencing section 11 has a single-row multi-hole structure, which is sealed with an O-ring between itself and the pressure shell. It also uses the inner cavity on the pressure shell to increase its volume, which is used to adjust the noise frequency that needs to be eliminated.
[0033] The second silencing section 12 adopts a two-row porous structure. The silencing cavity partition and the pressure shell are not completely sealed. It is mainly used to supplement the silencing frequency and noise transmission loss of the first and third cavities.
[0034] The third silencing section 13 adopts a multi-row, multi-hole structure. The cavity formed is the main cavity for eliminating the aerodynamic noise after the turbocharger is compressed. The silencing cavity is sealed with an O-ring between itself and the pressure shell. The lower part of the O-ring is inserted into the groove on the partition plate, and the upper circular part of the O-ring provides sealing and clamping force.
[0035] In this application, the three silencing chambers formed by the first silencing section 11, the second silencing section 12, and the third silencing section 13 are configured with adjusted chamber volume and diameter of through holes according to the noise frequency to be eliminated. Based on theoretical calculations, simulations, and bench tests, the peak transmission loss of this muffler between 1500-3500Hz is 50dB(A), and the average is approximately 30dB(A), which can effectively reduce the first-order pulse noise and intake whooshing sound generated by the turbocharger during operation.
[0036] The technical solution in this application uses a pressure shell as the outer shell of the silencer, and the silencer core tube is directly inserted into the pressure shell and fixed with bolts. This achieves the maximum noise reduction effect in a limited space. Since the silencer is installed directly at the noise source, the influence of pipelines, transmission paths and connectors is eliminated. Therefore, the transmission loss is higher than that of external silencers, and the cost advantage is obvious.
[0037] The scope of protection of this utility model includes, but is not limited to, the above embodiments. The scope of protection of this utility model is defined by the claims. Any substitutions, modifications, or improvements to this technology that are easily conceived by those skilled in the art shall fall within the scope of protection of this utility model.
Claims
1. An improved turbocharger housing structure, characterized by, The vent pipe of the pressure shell is equipped with a silencing structure. The part of the silencing structure inserted into the vent pipe is the inner core (1) of the silencing structure. The inner core (1) of the silencing structure includes: The first silencing section (11), the second silencing section (12), and the third silencing section (13) are provided with several through holes. A first annular partition (111) is provided between the first silencing section (11) and the second silencing section (12), and a second annular partition (121) is provided between the second silencing section (12) and the third silencing section (13). The outer periphery of the first annular partition (111) is sealed with the inner wall of the air outlet pipe of the pressure shell; There is a gap between the outer periphery of the second annular partition (121) and the inner wall of the air outlet pipe of the pressure shell; The silencer structure is sealed to the outlet of the air outlet pipe.
2. The improved turbocharger housing structure according to claim 1, characterized in that The first silencing section (11) has a plurality of first through holes (41) arranged in a ring on the pipe wall, the second silencing section (12) has a plurality of second through holes (42) arranged in two rings on the pipe wall, and the third silencing section (13) has a plurality of third through holes (43) arranged in four rings on the pipe wall.
3. The improved turbocharger housing structure according to claim 1, wherein The first annular partition (111) is sealed to the inner wall of the tube at the air outlet of the pressure shell by a sealing ring.
4. The improved turbocharger housing structure according to claim 1, wherein The silencing structure is provided with an assembly plate (2) for mounting at the outlet of the air outlet pipe. The inner side of the assembly plate (2) extends into a sealing platform (131) with an annular structure. The sealing platform (131) is sealed with the inner wall of the pipe body at the air outlet of the pressure shell by a sealing ring.
5. The improved turbocharger housing structure according to any one of claims 1 to 4, characterized in that A number of connecting ribs (132) are provided between the sealing platform (131) and the inner core (1) of the sound-absorbing structure.
6. The improved turbocharger housing structure according to any one of claims 4, wherein The assembly plate (2) is provided with bolt holes (25), and the air outlet of the pressure shell is provided with matching bolt holes.
7. The improved turbocharger housing structure according to any one of claims 6, wherein A bushing is provided on the inner wall of the bolt hole (25).
8. The improved turbocharger housing structure according to any one of claims 1 to 7, characterized in that The length ratio of the first silencing segment (11), the second silencing segment (12), and the third silencing segment (13) is 1.3~1.5:1:2.6~2.
8.
9. The improved turbocharger housing structure according to any one of claims 1 to 7, characterized in that, The ratio of the inner diameter of the inner core (1) of the silencing structure to the inner diameter of the tube at the air outlet of the pressure shell is 0.55~0.65.