Inlet silencing device of turbocharger gas compressor

Abstract

The invention provides an inlet silencing device of a turbocharger compressor, a compressor inlet is provided with a plurality of silencing cavities, a vibrating plate of a cantilever is arranged in at least one silencing cavity, at least one electrostatic driver is arranged on a vibrating path of the vibrating plate, local deformation is generated by controlling the electrostatic driver, and the compressor inlet silencing device is used for silencing the compressor inlet. The electrostatic actuator is caused to interfere with the vibration of the vibration plate. The electrostatic driver is arranged in the resonant cavity, the electrostatic driver makes contact with or is separated from the vibrating plate, so that the amplitude of the vibrating plate is changed, and the electrostatic driver and the vibrating plate can be selectively made to make contact with or be separated from each other according to the detected pressure change or noise of an outlet of the turbocharger; and the influence of synchronization impulse noise can be reduced or weakened.

Description

Technical Field

[0001] The invention relates to the field of turbochargers, and in particular to an inlet silencer of a turbocharger compressor. Background Art

[0002] The application of turbocharging technology in modern automobile engines has brought significant environmental and performance advantages. It uses the energy of exhaust gas discharged by the engine to drive the turbine to rotate, thereby compressing the air entering the engine, improving combustion efficiency and power output.

[0003] The main advantages of turbocharging technology include increased power output, lower fuel consumption and reduced pollutant emissions. This technology allows the engine to increase power and torque by increasing the intake volume without increasing displacement, thereby improving fuel efficiency and reducing exhaust emissions. As the world's requirements for energy conservation and emission reduction become increasingly stringent, turbocharging technology has become increasingly important due to its potential in reducing carbon dioxide (CO2) emissions.

[0004] The basic structure of a turbocharger consists of a turbine and a compressor, which are connected together by a shaft. The exhaust gas from the engine drives the turbine to rotate, which in turn drives the compressor to inhale and compress air, and then send the high-pressure air into the cylinder to increase combustion efficiency and power output. This way of utilizing the energy of exhaust gas improves engine efficiency, especially at high speeds, the turbocharger can provide a significant power boost.

[0005] As the turbocharger works at high speed, the increase in noise level becomes a major challenge. Turbocharger noise is generally caused by surge and synchronous vibration. Turbocharger surge usually occurs when the engine is running at a certain speed and the gas flow rate of the compressor decreases to a certain extent, the gas flow pattern entering the working impeller and the diffuser inlet changes significantly, the blade's incoming flow angle increases, and unstable separation occurs at the boundary airflow on the back of the impeller blade. The separated turbulence or vortex quickly expands to other areas of the compressor channel, causing cyclic oscillation or strong pulsation of the airflow, and the phenomenon of airflow backflow or gas reflux trend occurs, resulting in obvious fluctuations in characteristic parameters such as compressor flow, pressure or temperature, and a sharp drop in turbocharger efficiency. At the same time, the turbocharger produces abnormal vibration and noise problems. Therefore, surge is not allowed to occur and is generally detected at the factory. There are two main types of synchronous vibration excitation sources, namely pneumatic pulse excitation and rotor system dynamic unbalance vibration excitation. Therefore, the noise generated by synchronous vibration is also synchronous pulse noise. Synchronous pulse noise is mainly caused by slight differences in chamber volume between compressor blades due to manufacturing processes such as casting, grinding, cutting, heat treatment and assembly, or blade damage after long-term high-load use.

[0006] The traditional sound insulation layer has no obvious sound insulation effect on the air compressor inlet, especially it cannot simultaneously target surge and synchronous pulse vibration, so more advanced noise control technology is needed. Some studies have proposed using soundproofing materials on the pipes connecting the turbine inlet and outlet to soundproof, but this method cannot completely solve the problem, especially low-frequency noise. In order to reduce noise, researchers are exploring more effective sound insulation and sound absorption materials, as well as optimizing the design of turbochargers to reduce noise generation and transmission. Summary of the invention

[0007] In view of the deficiencies in the prior art, the present invention provides an inlet silencer for a turbocharger compressor. An electrostatic driver is arranged in the resonance chamber, and the electrostatic driver is brought into contact with or separated from a vibration plate, thereby changing the amplitude of the vibration plate. The electrostatic driver can be selectively brought into contact with or separated from the vibration plate according to the pressure change or noise level at the outlet of the turbocharger, thereby reducing or weakening the influence of synchronous pulse noise.

[0008] The present invention achieves the above technical objectives through the following technical means.

[0009] A turbocharger compressor inlet silencer device, wherein a plurality of silencer chambers are provided at the compressor inlet, at least one of the silencer chambers is provided with a cantilevered vibration plate, and at least one electrostatic driver is provided on the vibration path of the vibration plate. The electrostatic driver is controlled to produce local deformation so that the electrostatic driver interferes with the vibration of the vibration plate.

[0010] Furthermore, the electrostatic driver includes a positive electrode, a negative electrode, a dielectric film capsule and a liquid dielectric; a dielectric film capsule is provided between the positive electrode and the negative electrode, and no more than 1 / 2 of the A portion of the dielectric film capsule is located outside the positive electrode and the negative electrode; the dielectric film capsule is filled with liquid dielectric, and an electrode is installed on the wall of the anechoic chamber; the A portion of the dielectric film capsule is located on the vibration path of the vibration plate; a voltage is applied between the positive electrode and the negative electrode, so that the two electrodes squeeze the dielectric film capsule, so as to interfere the A portion with the vibration of the vibration plate.

[0011] Further, by applying a voltage between the positive electrode and the negative electrode, the portion A of the dielectric film capsule is brought into contact with the vibration plate.

[0012] Furthermore, a voltage is applied between the positive electrode and the negative electrode so that a gap exists between the A portion of the dielectric film capsule and the vibration plate, and the gap is smaller than the maximum amplitude of the vibration plate.

[0013] Furthermore, a cavity is provided in the A portion of the dielectric film capsule, and a plurality of solid particles are provided in the cavity.

[0014] Furthermore, it also includes a pressure sensor and a control system, wherein the pressure sensor is used to detect the air pressure at the outlet of the turbocharger; the control system uses the air pressure detected by the pressure sensor to determine whether pulse noise occurs; when pulse noise occurs, the control system applies a voltage between the positive electrode and the negative electrode.

[0015] Furthermore, two electrostatic drivers are placed on the upper and lower walls of the muffler chamber, and one electrostatic driver is respectively arranged on the upper and lower sides of the middle of the vibration plate, one in front and one behind.

[0016] Furthermore, two electrostatic drivers are symmetrically placed on the upper and lower walls of the anechoic chamber.

[0017] The beneficial effects of the present invention are:

[0018] 1. The inlet silencer of the turbocharger compressor described in the present invention arranges an electrostatic driver in the resonance chamber, and the electrostatic driver contacts or separates from the vibration plate, thereby changing the amplitude of the vibration plate. The electrostatic driver can be selectively contacted or separated from the vibration plate according to the pressure change or noise level at the outlet of the turbocharger, thereby reducing or weakening the influence of synchronous pulse noise.

[0019] 2. In the inlet silencer device of the turbocharger compressor described in the present invention, only half of the dielectric film capsule is located between the positive electrode and the negative electrode, and the remaining part is not constrained by the positive electrode and the negative electrode. When power is applied between the positive electrode and the negative electrode, the positive electrode and the negative electrode will gradually fit together due to Maxwell stress, so that the liquid dielectric in the dielectric film capsule located between the positive electrode and the negative electrode will flow into part A, causing part A to expand; the expanded part A contacts the vibration plate, which can limit the amplitude of the vibration plate, but increase the vibration frequency. In addition, since part A can be regarded as a liquid film elastic damping, it can further absorb vibration energy and reduce the noise energy in the silencer chamber. Here, the noise in the silencer chamber not only includes the noise generated by the original compressor inlet, but also includes the low-frequency noise generated during the vibration of the vibration plate.

[0020] 3. The inlet silencer of the turbocharger compressor described in the present invention isolates a cavity in part A of the dielectric film capsule with a film, the cavity is not connected to the dielectric film capsule, and a plurality of fixed particles are placed inside the cavity. The vibration of the vibration plate drives the liquid dielectric in the dielectric film capsule to vibrate, and the vibration of the liquid dielectric is transmitted to the elastic film to drive the plurality of fixed particles to vibrate. The fixed particles have a low mass and are more likely to produce a lower frequency resonance first, which is beneficial to the sound absorption of low-frequency pulse noise.

[0021] 4. The inlet silencer of the turbocharger compressor described in the present invention isolates a cavity by a film in part A of the dielectric film capsule, and the cavity is not connected to the dielectric film capsule. A plurality of fixed particles are placed inside the cavity. When the vibration plate vibrates, it first contacts the cavity or contacts the cavity and part A at the same time. The vibration plate drives the fixed particles in the cavity to resonate, so that the vibration of the fixed particles in the cavity consumes sound energy faster. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. The drawings described below are some embodiments of the present invention. For ordinary technicians in this field, it is obvious that other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 It is a half-section view of the inlet silencer of the turbocharger compressor described in the present invention.

[0024] Figure 2 It is a cross-sectional view of the muffler chamber described in the present invention.

[0025] Figure 3 It is a schematic diagram of the structure of the electrostatic actuator described in the present invention.

[0026] Figure 4 This is a schematic diagram of the installation of the electrostatic actuator structure described in the present invention.

[0027] Figure 5 It is a schematic diagram of the electrostatic actuator structure after deformation according to the present invention.

[0028] Figure 6 This is a schematic diagram of the electrostatic drive structure installation in Example 2.

[0029] Figure 7 This is a schematic diagram of the electrostatic drive structure installation in Example 5.

[0030] In the figure:

[0031] 1-inlet shell; 2-anechoic chamber; 3-electrostatic driver; 3-1-positive electrode; 3-2-negative electrode; 3-3-dielectric film capsule; 3-4 liquid dielectric; 4-vibration plate; 5-channel; 6-first electrostatic driver; 7-second electrostatic driver; 8-cavity; 9-solid particles. DETAILED DESCRIPTION

[0032] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "axial", "radial", "vertical", "horizontal", "inner", "outer" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] The inlet of the turbocharger compressor in the prior art has a plurality of muffler chambers 2 connected in series or a plurality of independent muffler chambers 2 uniformly distributed in the circumferential direction. The muffler chamber 2 of the plurality of muffler chambers 2 connected in series is generally provided with a channel 5 connected to the inlet, and each of the independent muffler chambers 2 uniformly distributed in the circumferential direction is connected to the inlet through the channel 5. The inlet muffler device of the turbocharger compressor of the present invention has a vibration plate 4 in at least one of the muffler chambers 2, wherein one end of the vibration plate 4 is embedded in the wall of the muffler chamber 2, and the other end of the vibration plate 4 extends into the muffler chamber 2, and the air inlet of the muffler chamber 2 is obliquely aligned with the other end of the vibration plate 4, so that the noise acts on the vibration plate 4 through the air inlet, causing the vibration plate 4 to vibrate, so that the energy of the noise of the corresponding frequency can be consumed in the muffler chamber 2, reducing the propagation of the noise. At least one electrostatic driver 3 is provided in the muffler chamber 2, and the electrostatic driver 3 contacts or separates from the vibration plate 4, thereby changing the amplitude of the vibration plate 4. Since one end of the vibration plate 4 is fixedly connected to the wall of the muffler chamber 2, the vibration plate 4 can be regarded as a cantilever beam with one end fixed, and the electrostatic driver 3 is in contact with the vibration plate 4, which can limit the amplitude of the vibration plate 4. When the electrostatic driver 3 is separated from the vibration plate 4, it is equivalent to releasing the constraint of the vibration plate 4, so the vibration plate 4 can achieve the maximum amplitude or change the vibration frequency. Therefore, the electrostatic driver 3 can be selectively made to contact or separate with the vibration plate 4 according to the pressure change or noise level at the outlet of the turbocharger.

[0036] like Figure 3As shown, the electrostatic driver 3 includes a positive electrode 3-1, a negative electrode 3-2, a dielectric film capsule 3-3 and a liquid dielectric 3-4; the dielectric film capsule 3-3 is bonded between the positive electrode 3-1 and the negative electrode 3-2. It can be seen from the figure that only half of the dielectric film capsule 3-3 is located between the positive electrode 3-1 and the negative electrode 3-2, and the remaining part is not constrained by the positive electrode 3-1 and the negative electrode 3-2. For the convenience of description, the remaining part of the dielectric film capsule 3-3 is recorded as part A. The dielectric film capsule 3-3 is filled with a liquid dielectric 3-4, and the positive electrode 3-1 or the negative electrode 3-2 is embedded in the wall of the anechoic cavity 2. When there is no power between the positive electrode 3-1 and the negative electrode 3-2, the dielectric film capsule 3-3 is elliptical. The elliptical shape can be understood as the dielectric film capsule 3-3 bulging due to the tension of the liquid. At this time, part A is not in contact with the vibration plate 4. When power is applied between the positive electrode 3-1 and the negative electrode 3-2, the positive electrode 3-1 and the negative electrode 3-2 will gradually fit together due to Maxwell stress, that is, the unfixed electrode moves toward the fixed electrode, so that the liquid dielectric 3-4 in the dielectric film capsule 3-3 between the positive electrode 3-1 and the negative electrode 3-2 will flow into part A, causing part A to expand; the expanded part A contacts the vibration plate 4, which can limit the amplitude of the vibration plate 4, but will increase the vibration frequency. In addition, since part A can be regarded as a liquid film elastic damping, it can further absorb vibration energy and reduce the noise energy in the silencer chamber 2. Here, the noise in the silencer chamber 2 not only includes the noise generated by the outlet of the supercharger, but also includes the low-frequency noise generated during the vibration of the vibration plate 4.

[0037] Example 1

[0038] like Figure 1 and Figure 2 As shown, the compressor inlet of the turbocharger has six independent silencer chambers 2 evenly distributed in the circumference, and each silencer chamber 2 is connected to the inlet of the turbocharger through a channel 5. Two symmetrical silencer chambers 2 are arbitrarily selected, and each of the silencer chambers 2 is provided with a cantilevered vibration plate 4, and the other end of the vibration plate 4 extends to the vicinity of the air inlet of the silencer chamber 2. One end of the positive electrode 3-1 is embedded in the groove on the wall of the silencer chamber 2, and a dielectric film capsule 3-3 is bonded between the positive electrode 3-1 and the negative electrode 3-2. The positive electrode 3-1 and the negative electrode 3-2 are arranged in parallel. Since the negative electrode 3-2 needs to move toward the positive electrode 3-1 due to Maxwell stress, there is a gap between the negative electrode 3-2 and the wall of the silencer chamber 2 to facilitate the movement of the negative electrode 3-2. Only half of the dielectric film capsule 3-3 is located between the positive electrode 3-1 and the negative electrode 3-2. When the positive electrode 3-1 and the negative electrode 3-2 are not energized, the dielectric film capsule 3-3 in the initial state is as shown in FIG. Figure 4As shown, the dielectric film capsule 3-3 is not in contact with the vibration plate 4, and the vibration of the vibration plate 4 cannot contact the dielectric film capsule 3-3. It can be considered that the dielectric film capsule 3-3 will not interfere with the amplitude of the vibration plate 4 under the action of noise. When the positive electrode 3-1 and the negative electrode 3-2 are energized, the positive electrode 3-1 and the negative electrode 3-2 will gradually fit together due to the Maxwell stress, and the negative electrode 3-2 will approach the positive electrode 3-1, squeezing the dielectric film capsule 3-3, so that the liquid dielectric 3-4 in the dielectric film capsule 3-3 between the positive electrode 3-1 and the negative electrode 3-2 will flow into the A part, and the expanded A part will interfere with the vibration of the vibration plate 4. Here, the expanded A part can directly contact the vibration plate 4, so that the interference effect is the best, but it can also be that the expanded A part still has a gap with the vibration plate 4, but the gap is smaller than the amplitude of the vibration plate 4 under the action of noise, that is, the vibration plate 4 can still contact the vibration plate 4 at the maximum amplitude.

[0039] The present invention uses whether the gas pressure at the turbocharger outlet changes suddenly to characterize whether pulse noise occurs at the turbocharger outlet. When pulse noise does not occur, no voltage is applied between the positive electrode 3-1 and the negative electrode 3-2, and noise reduction is achieved by using the anechoic chamber 2 and the vibration plate 4 itself. When pulse noise occurs, a voltage is applied between the positive electrode 3-1 and the negative electrode 3-2, and the expanded part A interferes with the vibration of the vibration plate 4, but increases the vibration frequency of the vibration plate 4, and the part A is a liquid film elastic damping, which can also further absorb vibration energy, especially for low-frequency noise.

[0040] Example 2

[0041] On the basis of Example 1, two electrostatic actuators 3 are placed on the upper and lower walls of the muffler chamber 2. Figure 6 As shown. An electrostatic driver 3 is provided on the upper and lower sides of the middle of the vibration plate 4, one in front and one behind. Initially, the two electrostatic drivers 3 are not powered on, that is, the dielectric film capsules 3-3 of the two electrostatic drivers 3 will not interfere with the vibration amplitude of the vibration plate 4. When one of the two electrostatic drivers 3 is powered on, the situation is the same as in Example 1, that is, the expanded A part of the powered electrostatic driver 3 interferes with the vibration of the vibration plate 4. When the two electrostatic drivers 3 are powered on at the same time, the expanded A parts of the two electrostatic drivers 3 interfere with the vibration of the vibration plate 4 respectively.

[0042] In Example 2, the judgment of the size of the outlet noise is added. For the convenience of description, the electrostatic drivers 3 on the upper and lower sides are respectively recorded as the first electrostatic driver 6 and the second electrostatic driver 7. Figure 6 The first electrostatic driver 6 is located in front of the second electrostatic driver 7;

[0043] When no pulse noise occurs, the first electrostatic driver 6 and the second electrostatic driver 7 are both powered off, and the vibration plate 4 has an amplitude A0 and a frequency f0;

[0044] When pulse noise occurs and the noise is lower than the set value, only the first electrostatic driver 6 is energized, so that the A part of the dielectric film capsule 3-3 of the first electrostatic driver 6 interferes with the vibration of the vibration plate 4. At this time, the amplitude of the vibration plate 4 is A1 and the frequency is f1;

[0045] When pulse noise occurs and the noise is greater than the set value, the first electrostatic driver 6 and the second electrostatic driver 7 are energized respectively, so that the A part of the dielectric film capsule 3-3 of the first electrostatic driver 6 and the second electrostatic driver 7 interferes with the vibration of the vibration plate 4 at the same time. At this time, the amplitude of the vibration plate 4 is A2 and the frequency is f2;

[0046] Although A0>A1>A2, f2>f1>f0, by increasing the resonance frequency of the vibration plate 4 to match the noise frequency, although the amplitude is reduced, the vibration plate 4 has a better sound absorption effect.

[0047] The gap size between the expanded A part and the vibration plate 4 is adjusted, and different gaps correspond to different resonance frequencies of the vibration plate 4. Through continuous experiments, the gap size corresponding to the target noise frequency can be easily determined, which is convenient for matching the target noise frequency.

[0048] Example 3

[0049] On the basis of Example 2, electrostatic drivers 3 are symmetrically arranged on the upper and lower sides of the middle of the vibration plate 4 , that is, the first electrostatic driver 6 and the second electrostatic driver 7 are symmetrically arranged on the upper and lower sides of the vibration plate 4 .

[0050] Example 4

[0051] The inlet of the turbocharger compressor has three muffler chambers 2 connected in series. The arrangement of the electrostatic driver 3 in any muffler chamber 2 is the same as that in Embodiment 1 or Embodiment 2, and the principle is also similar.

[0052] Example 5

[0053] like Figure 7As shown, on the basis of Example 1 or Example 2 or Example 3 or Example 4, a cavity 9 is isolated by a film in the A part of the dielectric film capsule 3-3, and the cavity 9 is not connected to the dielectric film capsule 3-3. The film is an elastic film that can withstand the deformation of the A part without damage. The cavity 8 is filled with gas, generally air. A number of fixed particles 9 are placed inside the cavity 8. In the process of the expanded A part interfering with the vibration of the vibration plate 4, the vibration of the vibration plate 4 will drive the liquid dielectric 3-4 in the dielectric film capsule 3-3 to vibrate, and the vibration of the liquid dielectric 3-4 is transmitted to the elastic film to drive a number of solid particles 9 to vibrate. The solid particles 9 are low in mass and are more likely to produce a lower frequency resonance first, which is beneficial to the sound absorption of pulse noise. The solid particles 9 are generally non-metallic particles with a particle size of 0.3 to 0.8 mm. In another embodiment, when the vibration plate 4 vibrates, it first contacts the cavity 8 or contacts the cavity 8 and part A at the same time. The vibration plate 4 drives the solid particles 9 in the cavity 8 to resonate, so that the vibration of the solid particles 9 in the cavity 8 consumes sound energy faster.

[0054] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0055] The series of detailed descriptions listed above are only specific descriptions of feasible embodiments of the present invention. They are not intended to limit the scope of protection of the present invention. All equivalent embodiments or changes that do not deviate from the technical spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. An inlet silencer device for a turbocharger compressor, wherein the inlet of the compressor is provided with a plurality of silencer chambers (2), characterized in that: A cantilevered vibration plate (4) is provided in at least one of the muffler chambers (2), and at least one electrostatic driver (3) is provided on the vibration path of the vibration plate (4). The electrostatic driver (3) is controlled to produce local deformation so that the electrostatic driver (3) interferes with the vibration of the vibration plate (4).

2. The inlet silencer device of the turbocharger compressor according to claim 1, characterized in that: The electrostatic driver (3) comprises a positive electrode (3-1), a negative electrode (3-2), a dielectric film capsule (3-3) and a liquid dielectric (3-4); a dielectric film capsule (3-3) is provided between the positive electrode (3-1) and the negative electrode (3-2), and a portion A of the dielectric film capsule (3-3) not exceeding 1 / 2 is located outside the positive electrode (3-1) and the negative electrode (3-2); the dielectric film capsule (3-3) is filled with a liquid dielectric (3-4), and one of the electrodes is mounted on the wall of the anechoic chamber (2); the portion A of the dielectric film capsule (3-3) is located on the vibration path of the vibration plate (4); a voltage is applied between the positive electrode (3-1) and the negative electrode (3-2), so that the two electrodes squeeze the dielectric film capsule (3-3) to interfere with the vibration of the vibration plate (4).

3. The inlet silencer device of the turbocharger compressor according to claim 2, characterized in that: By applying a voltage between the positive electrode (3-1) and the negative electrode (3-2), the A portion of the dielectric film capsule (3-3) is brought into contact with the vibration plate (4).

4. The inlet silencer device of the turbocharger compressor according to claim 2, characterized in that: By applying a voltage between the positive electrode (3-1) and the negative electrode (3-2), a gap exists between the A portion of the dielectric film capsule (3-3) and the vibration plate (4), and the gap is smaller than the maximum amplitude of the vibration plate (4).

5. The inlet silencer device of the turbocharger compressor according to claim 2, characterized in that: A cavity (8) is provided in the A portion of the dielectric film capsule (3-3), and a plurality of solid particles (9) are provided in the cavity (8).

6. The inlet silencer device of the turbocharger compressor according to claim 2, characterized in that: It also includes a pressure sensor and a control system, wherein the pressure sensor is used to detect the air pressure at the outlet of the turbocharger; the control system uses the air pressure detected by the pressure sensor to determine whether pulse noise occurs; When pulse noise occurs, the control system applies a voltage between the positive electrode (3-1) and the negative electrode (3-2).

7. The inlet silencer device of a turbocharger compressor according to claim 1, characterized in that: Two electrostatic drivers (3) are placed on the upper and lower walls of the muffler chamber (2), and an electrostatic driver (3) is respectively arranged on the upper and lower sides of the middle of the vibration plate (4), one in front and one behind.

8. The inlet silencer device of a turbocharger compressor according to claim 1, characterized in that: Two electrostatic drivers (3) are symmetrically placed on the upper and lower walls of the muffler chamber (2).

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