Multi-stage vibration and noise reduction structure for electric auxiliary turbocharger

Abstract

The invention relates to the technical field of turbocharging, and discloses a multi-stage vibration and noise reduction structure for an electric auxiliary turbocharger, which comprises an internal electric auxiliary turbocharger body, a shell and a multi-rod supporting structure. The lower end of the body is connected with a multi-rod supporting structure, the multi-rod supporting structure comprises a middle connecting rod, a hydraulic damping unit, a vibration reduction sleeve, a main spring, a matched spring and other complex supporting structures which are connected, and a closed oil cavity formed by a hydraulic core and a sealing core is arranged. A vibration and noise reduction shell is arranged on the outer side of the body and comprises an outer-layer composite material plate, a curved noise reduction rod, noise reduction cotton, a transverse noise reduction rod and a vibration reduction baffle. According to the multi-stage vibration and noise reduction structure for the electric auxiliary turbocharger, multi-stage vibration reduction damping coupling can be achieved through a multi-rod supporting structure, high-frequency energy is dissipated through a closed oil cavity, a vibration source is restrained, and excellent vibration reduction is achieved; the outer layer of the shell absorbs scattering, the middle filling layer absorbs medium-high frequency noise, and the inner layer is provided with the curved and transverse noise reduction rods, so that the noise reduction performance is remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of turbocharging, and in particular to a multi-stage vibration and noise reduction structure for an electrically assisted turbocharger. Background Art

[0002] With the increasing demand for energy conservation and emission reduction, and the requirement for improved engine performance, electrically assisted turbochargers are becoming increasingly important in modern automotive engine technology. They can effectively reduce turbo lag, while improving power output efficiency, fuel economy, and reducing exhaust emissions. However, vibration and noise issues are particularly prominent during operation: vibration is primarily caused by multiple factors such as mechanical structural imbalance, periodic airflow excitation, and electromagnetic interference; noise arises from aerodynamic turbulence, mechanical component friction, and high-frequency oscillations of electromagnetic components. These negative effects not only significantly reduce driving comfort but also accelerate component fatigue damage, thereby affecting the overall life and reliability of the system.

[0003] Traditional vibration and noise reduction solutions generally utilize a single spring or rubber pad structure, resulting in a single vibration reduction layer that is difficult to adapt to the fluctuating characteristics of dynamic loads under complex operating conditions. Due to the lack of multi-path vibration energy dissipation design, noise reduction effectiveness is limited to low-frequency control. Furthermore, sealing structures are prone to aging and failure in environments with high-pressure fluid erosion, leading to a decrease in the function of vibration reduction components. Furthermore, existing systems face challenges during installation and maintenance, such as complex structural disassembly and time-consuming component replacement, further driving up operational costs. Summary of the Invention

[0004] (1) Technical problems solved In response to the shortcomings of the existing technology, the present invention provides a multi-stage vibration and noise reduction structure for an electrically assisted turbocharger, which solves the problems of limited vibration suppression effect under high frequency and complex excitation and ineffective vibration reduction, and significantly improves the reliability, life and acoustic performance of the turbocharger.

[0005] (2) Technical solution To achieve the above-mentioned objectives, the present invention provides the following technical solution: a multi-stage vibration and noise reduction structure for an electrically assisted turbocharger, comprising an electrically assisted turbocharger external tube, a damper rod upper connecting tube, a damper middle outer rod, a small damper rod, a damper baffle, trapezoidal noise reduction cotton, a curved noise reduction rod, the outer portion of the damper middle rod, a damper system connecting rod, a damper baffle connection, an upper outer tube sealing ring, a hydraulic core, a sealing core, the inner portion of the damper middle rod, a damper sleeve, a matching spring, a lower sealing ring, a main spring, inlet and outlet ports, and an air inlet. The electrically assisted turbocharger external tube is connected to the turbocharger body, and its inner wall is rigidly fixed to the damper rod upper connecting tube; the damper middle outer rod is nested outside the damper rod upper connecting tube, and the two are elastically coupled via a main spring; the damper middle rod is internally provided with a hydraulic core and a sealing core, forming a hydraulic damping unit for absorbing high-frequency vibrations; and the damper baffles are linked together at the damper baffle connection to form a multi-stage elastic buffer structure.

[0006] Preferably, the outer layer is a high-strength and lightweight carbon fiber reinforced composite material, the middle filling layer is a porous sound-absorbing material, and the inner layer is a high-damping alloy material. The carbon fiber reinforced composite material has excellent pressure and impact resistance, can protect internal components, and has a certain scattering and absorption effect on noise due to its special fiber structure. The porous sound-absorbing material has an extremely low density and rich pore structure, and has a significant effect on absorbing medium and high-frequency noise. The high-damping alloy material can effectively suppress vibration and convert vibration energy into heat energy for dissipation.

[0007] Preferably, the hydraulic-sealed vibration reduction structure of the multi-rod support structure realizes the coordination of multi-stage vibration reduction and damping, and combines with the closed oil chamber to efficiently dissipate high-frequency vibration energy, thereby suppressing the vibration source and achieving better vibration reduction effect; the vibration reduction baffle and the connecting rod linkage structure can enhance the overall stability and flexibility.

[0008] Preferably, the housing is provided with a curved noise reduction rod and trapezoidal noise reduction cotton, which has good flexibility and scalability, can absorb vibration and displacement caused by airflow pressure fluctuations and thermal deformation, and reduce the vibration excitation of the pipeline on the turbocharger body.

[0009] (3) Beneficial effects Compared with the prior art, the present invention provides a multi-stage vibration and noise reduction structure for an electrically assisted turbocharger, which has the following beneficial effects: 1. This multi-stage vibration and noise reduction structure for the electrically assisted turbocharger achieves step-by-step dissipation of vibration energy and improves vibration reduction efficiency through hydraulic damping, spring elastic coupling, and baffle linkage buffering.

[0010] 2. The multi-stage vibration and noise reduction structure used for the electrically assisted turbocharger, through the design of double-lip sealing rings and corrosion-resistant hydraulic core, adapts to high-pressure and high-humidity environments and extends the service life of the components.

[0011] 3. The multi-stage vibration and noise reduction structure for the electrically assisted turbocharger adopts a quick-release structure for the vibration-damping sleeve and the connecting rod, which supports partial replacement and reduces maintenance costs.

[0012] 4. The multi-stage vibration and noise reduction structure for the electrically assisted turbocharger, by combining the assistance of the damper and the shock-absorbing spring, and the high-damping alloy inner layer to suppress the vibration source, comprehensively improves the stability, reliability and acoustic performance of the electrically assisted turbocharger and extends its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the multi-stage vibration and noise reduction structure; Figure 2 for Figure 1 A side structural diagram of Figure 3 It is a structural diagram of a hydraulic-sealed vibration reduction structure with a multi-rod support structure; Figure 4 for Figure 3 Schematic diagram of the internal structure; Figure 5 for Figure 3 Schematic diagram of the internal pore structure from a top view Figure 6 Schematic diagram of the structure of the vibration and noise reduction shell.

[0014] In the figure: 1. External tube of electric-assisted turbocharger; 2. Upper connecting tube of vibration damper rod; 3. Middle outer rod of vibration damper; 4. Small vibration damper rod; 5. Vibration damping baffle; 6. Trapezoidal noise reduction cotton; 7. Curved noise reduction rod; 8. External part of middle rod of vibration damper; 9. Vibration damping connecting rod; 10. Vibration damping baffle connecting plate; 11. Sealing ring of upper outer tube; 12. Hydraulic core; 13. Sealing core; 14. Internal part of middle rod of vibration damper; 15. Vibration damping sleeve; 16. Matching spring; 17. Lower sealing ring; 18. Main spring; 19. Inlet and outlet holes; 20. Inlet hole. DETAILED DESCRIPTION

[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0016] See also Figure 1-6A multi-stage vibration and noise reduction structure for an electrically assisted turbocharger includes an electrically assisted turbocharger external pipe 1 fixed to a supercharger housing, a vibration damper rod upper connecting pipe 2 connected to the inner wall of the external pipe 1, and the vibration impact force is transmitted to the vibration damper intermediate outer rod 3 through the vibration damper rod upper connecting pipe 2. The vibration damper intermediate outer rod 3 is nested into the vibration damper rod upper connecting pipe 2 and fixed by pre-compression through the main spring 18. A hydraulic core 12 and a sealing core 13 are installed on the vibration damper sleeve rod 15. After hydraulic oil is injected, the oil chamber is sealed to ensure that the inlet and outlet holes 19 are connected to the air inlet hole 20. The main spring 18 is compressed to absorb low-frequency vibrations, and the hydraulic oil passes through the inlet and outlet holes 19 and the air inlet hole 20 and finally returns from the inlet and outlet holes 19.

[0017] See also Figure 1-6 A trapezoidal vibration damping baffle 5 is provided on one side of the electric-assisted turbocharger body, and a vibration damping baffle connection 10 is provided on its edge. The inner layer is provided with a curved noise reduction rod 7, and the surface of the curved noise reduction rod 7 is covered with trapezoidal noise reduction cotton 6. The density of the noise reduction cotton 6 increases gradually along the direction of the internal circulation structure of the turbocharger.

[0018] See also Figure 1-6 The vibration damping baffle 5 is a high-strength and lightweight carbon fiber reinforced composite material, the middle filling layer of trapezoidal noise reduction cotton 6 is a porous sound-absorbing material, and the curved noise reduction rod 7 is a high-damping alloy material. The carbon fiber reinforced composite material has excellent pressure and impact resistance, and can protect internal components. It also has a certain scattering and absorption effect on noise due to its special fiber structure. The porous sound-absorbing material has an extremely low density and rich pore structure, and has a significant effect on absorbing medium and high-frequency noise. The high-damping alloy material can effectively suppress vibration and convert vibration energy into heat energy for dissipation.

[0019] See also Figure 1-6 The vibration damping baffle connecting plate 10 has good flexibility and scalability, and can absorb vibration and displacement caused by airflow pressure fluctuations and thermal deformation, thereby reducing vibration excitation to the turbocharger body.

[0020] In summary, in the multi-stage vibration and noise reduction structure for the electrically assisted turbocharger, when in use, the vibration of the electrically assisted turbocharger is transmitted to the vibration reduction system through the external pipe 1, the main spring 18 first absorbs low-frequency vibrations, the hydraulic core 12 suppresses high-frequency fluctuations through oil pressure changes, and the matching spring 16 in the linkage sleeve provides elastic reset force to achieve multi-stage energy dissipation; the curved noise reduction rod 7 optimizes the flow field distribution and reduces eddy current noise, the vibration reduction baffle structure is a high-damping alloy material, the carbon fiber reinforced composite material has excellent pressure and impact resistance, can protect internal components, and has a certain scattering and absorption effect on noise due to its special fiber structure, the porous sound-absorbing material has an extremely low density and rich pore structure, and has a significant effect on absorbing medium and high-frequency noise, and the high-damping alloy material can effectively suppress vibration and convert vibration energy into heat energy for dissipation.

[0021] It should be noted that the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0022] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A multi-stage vibration and noise reduction structure for an electrically assisted turbocharger, comprising an electrically assisted turbocharger body and an electrically assisted turbocharger external pipe (1), characterized in that: One end of the external pipe (1) of the electrically assisted turbocharger is connected to the main body of the turbocharger, and the inner wall of the other end is fixedly connected to the connecting pipe (2) on the vibration damping rod. The external portion of the connecting pipe (2) is embedded with a vibration damping intermediate outer rod (3), and is elastically coupled to the vibration damping sleeve (15) through an internal main spring (18). The vibration damping sleeve (15) is combined with the internal portion (14) of the vibration damping intermediate rod, and a hydraulic core (12) and a sealing core (13) are built in. A sealed oil chamber is formed between the hydraulic core (12) and the sealing core (13), and the oil chamber is balanced with the external air pressure through the inlet and outlet holes (19). The vibration-damping sleeve (15) is sleeved inside the vibration-damping middle outer rod (3) and is provided with a matching spring (16). The vibration-damping sleeve (15) forms a multi-part elastic buffer structure through the vibration-damping connecting rod (9). A vibration-damping baffle (5) with a fan-shaped structure is provided on one side of the electric-assisted turbocharger body, and a vibration-damping baffle connection part (10) is provided on the edge thereof. A curved noise reduction rod (7) is provided on the inner layer, and the surface of the curved noise reduction rod (7) is covered with trapezoidal noise reduction cotton (6). The density of the noise reduction cotton (6) increases gradually along the direction of the internal circulation structure of the turbocharger.

2. The multi-stage vibration and noise reduction structure for an electrically assisted turbocharger according to claim 1, characterized in that: A hydraulic oil channel is provided inside the hydraulic core (12), and the inner wall of the channel is coated with a wear-resistant ceramic coating. The sealing core (13) is made of corrosion-resistant fluororubber and is interference-fitted with the inside of the vibration-damping intermediate rod (14).

3. The multi-stage vibration and noise reduction structure for an electrically assisted turbocharger according to claim 1, characterized in that: The upper outer tube sealing ring (11) and the lower sealing ring (17) both adopt a double-lip sealing structure, with a graphite lubricating layer coated on the inner side. The clearance between the outer diameter of the sealing ring and the inner wall of the turbine outer tube (1) is 0.1-0.3 mm.

4. The multi-stage vibration and noise reduction structure for an electrically assisted turbocharger according to claim 1, characterized in that: The air inlet and outlet holes (19) are located in the air passage on the inner wall of the vibration damping sleeve (15) and are provided with a one-way valve for regulating the air pressure in the oil chamber.

5. The multi-stage vibration and noise reduction structure for an electrically assisted turbocharger according to claim 1, characterized in that: The stiffness ratio of the supporting spring (16) to the main spring (18) is 1:3, and the compression stroke of the supporting spring (16) is 20% to 30% of the length of the vibration damping sleeve (15).

6. The multi-stage vibration and noise reduction structure for an electrically assisted turbocharger according to claim 1, characterized in that: The cross section of the curved noise reduction rod (7) is streamlined, and the trapezoidal noise reduction cotton (6) on its surface has a thickness of 10 mm to 15 mm and a porosity of 60% to 80%.

Images