A noise reduction device for a metallized polypropylene film capacitor

Abstract

The utility model provides a kind of metallized polypropylene film capacitor noise reduction device, it is related to capacitor technical field, comprising: capacitor, the one side of capacitor is equipped with two power lines, the upper and lower positions of capacitor are respectively installed one noise reduction board, the outside position of noise reduction board is installed one first cache sponge, the outside position of first cache sponge is installed one protective inner shell, protective inner shell has two, the outside position of protective inner shell is respectively installed one first protective outer shell, one second protective outer shell.Noise reduction board inside face is established honeycomb structure noise reduction groove, can make incoming sound wave constantly reflect and refract, effectively consume sound wave energy, first cache sponge and second cache sponge and noise reduction board mutually cooperate, further enhance the sound insulation effect, so that noise reduction board can more effectively absorb noise, solve the problem that capacitor generates noise and influences surrounding environment.

Description

Technical Field

[0001] This utility model relates to the field of capacitor technology, and in particular to a noise reduction device for a metallized polypropylene film capacitor. Background Technology

[0002] Capacitors, including metallized polypropylene film capacitors, are used in power circuits, power electronic devices, and various household appliances. However, metallized polypropylene film capacitors generate noise during actual use. Currently, some capacitors use traditional sound insulation materials for noise reduction, such as ordinary rubber pads and foam boards. However, sound insulation materials still have the following shortcomings:

[0003] First, while materials such as rubber pads and foam boards can reduce noise transmission to some extent, their limited sound insulation properties result in unsatisfactory noise reduction effects.

[0004] Secondly, the noise reduction structure design of capacitors is relatively simple, simply wrapping a layer of sound insulation material around the capacitor. Capacitors have defects in isolation and buffering, which means that noise can still be transmitted through the air and other means. The generation of noise has many adverse effects on the normal operation of the equipment and the user experience. Utility Model Content

[0005] This utility model relates to a noise reduction device for a metallized polypropylene film capacitor. The honeycomb structure noise reduction groove opened on the inner side of the noise reduction plate can continuously reflect and refract the incoming sound waves, effectively consuming the sound wave energy. The first and second buffer sponges work together with the noise reduction plate to further enhance the sound insulation effect, enabling the noise reduction plate to absorb noise more effectively. The sound insulation groove formed by the first protective shell, the inner protective shell, and the second protective shell further reduces the outward diffusion of noise from the capacitor after the air is drawn to form a vacuum space.

[0006] This utility model provides a noise reduction device for a metallized polypropylene film capacitor, specifically including: a capacitor, two power lines on one side of the capacitor, a noise reduction plate installed at the top and bottom of the capacitor respectively, a first buffer sponge installed on the outer side of the noise reduction plate, a protective inner shell installed on the outer side of the first buffer sponge, two protective inner shells in total, a first protective outer shell and a second protective outer shell installed on the outer side of the protective inner shell respectively, two locking bolts installed on both sides of the first protective outer shell and the second protective outer shell, and two positioning sleeves on both sides of the second protective outer shell, with a positioning rod inserted inside the positioning sleeve.

[0007] Furthermore, two threaded holes are respectively opened on both sides of the first protective shell, and two bolt mounting holes are respectively opened on both sides of the second protective shell. The locking bolt passes through the bolt mounting holes and the threaded holes for threaded connection.

[0008] Furthermore, a set of evenly distributed noise reduction grooves are formed on the inner side of the noise reduction plate, and the noise reduction grooves have a honeycomb structure.

[0009] Furthermore, a positioning groove is formed on the inner side of the first buffer sponge. The positioning groove has a rectangular structure, and the noise reduction plate is installed inside the positioning groove.

[0010] Furthermore, two symmetrically distributed second buffer sponges are adhered to the inner side of the noise reduction plate. The second buffer sponges have a rectangular structure. The first buffer sponge, the noise reduction plate, and the second buffer sponge work together to form a sound insulation structure. The inner side of the second buffer sponge is in contact with the outer wall of the capacitor.

[0011] Furthermore, a sound-insulating groove is formed between the first protective outer shell and the protective inner shell, and a sound-insulating groove is formed between the second protective outer shell and the protective inner shell. The first protective outer shell, the protective inner shell, and the second protective outer shell cooperate with each other to form a protective structure.

[0012] Furthermore, one side of the positioning rod is provided with an integral anti-loosening plate, and a set of friction protrusions are provided above the anti-loosening plate. The friction protrusions are arc-shaped.

[0013] Furthermore, a support spring is installed on the outer side of the positioning rod, and an annular groove is formed on one side of the positioning rod, with a retaining ring installed at the position of the annular groove.

[0014] This invention provides a noise reduction device for a metallized polypropylene film capacitor, which has the following beneficial effects:

[0015] This utility model is provided with a first protective outer shell, a protective inner shell, a second protective outer shell, a first buffer sponge, a noise reduction plate, and a second buffer sponge working together to form a noise reduction device to achieve the effect of capacitor noise reduction;

[0016] Specifically, the honeycomb structure noise reduction grooves on the inner side of the noise reduction panel can continuously reflect and refract the incoming sound waves, effectively dissipating sound wave energy and reducing sound intensity.

[0017] Specifically, the first and second buffer sponges are made of sound-insulating cotton with good elasticity. They work together with the noise reduction board to further enhance the sound insulation effect. The second buffer sponge flexibly isolates the capacitor and the noise reduction board, allowing the noise reduction board to absorb noise more effectively. At the same time, the combination of multiple layers of sound insulation materials can cope with noise of different frequencies and reduce the operating noise of the capacitor in all aspects.

[0018] Specifically, the sound insulation groove formed by the first protective shell, the inner protective shell, and the second protective shell can effectively block the propagation path of sound after the air is extracted to form a vacuum space, because sound propagation requires a medium, thereby further reducing the outward diffusion of noise from the capacitor.

[0019] Specifically, the first and second protective shells are securely joined by locking bolts passing through bolt mounting holes and threaded holes. At the same time, anti-loosening plates are provided to prevent the locking bolts from loosening, ensuring that the protective structure remains stable during long-term use. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.

[0021] The accompanying drawings described below are only related to some embodiments of the present invention and are not intended to limit the scope of the present invention.

[0022] In the attached diagram:

[0023] Figure 1 A schematic diagram of the axial structure of the capacitor and noise reduction device after assembly of this utility model is shown.

[0024] Figure 2 A schematic diagram of the axial side structure of a partial cross-section of the noise reduction device of this utility model is shown;

[0025] Figure 3 A schematic diagram of the axial side structure of the noise reduction device of this utility model is shown.

[0026] Figure 4 This utility model illustrates Figure 3 A schematic diagram of the axonal structure from an elevation viewpoint;

[0027] Figure 5 The diagram shows a partial cross-sectional view of the protective structure and sound insulation structure of this utility model.

[0028] Figure 6 A schematic diagram of the axial side structure of the noise reduction plate cross-section of this utility model is shown;

[0029] Figure 7 The diagram shows a half-section view of the protective structure and sound insulation structure of this utility model.

[0030] List of reference numerals

[0031] 1. Capacitor;

[0032] 2. Protective structure; 201. First protective outer shell; 202. Inner protective shell; 203. Second protective outer shell;

[0033] 3. Sound insulation structure; 301. First cushioning foam; 302. Noise reduction board; 303. Second cushioning foam;

[0034] 4. Tighten the bolts;

[0035] 5. Positioning rod; 501. Anti-loosening plate. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0037] Example 1: Please refer to Figures 1 to 7 :

[0038] This invention proposes a noise reduction device for a metallized polypropylene film capacitor, comprising: a capacitor 1, two power lines on one side of the capacitor 1, a noise reduction plate 302 installed at the top and bottom of the capacitor 1 respectively, a first buffer sponge 301 installed on the outer side of the noise reduction plate 302, and a set of evenly distributed noise reduction grooves with a honeycomb structure on the inner side of the noise reduction plate 302. The noise reduction plate 302 is made of a high-strength and elastic metal material, the specific material of which is selected according to actual needs. When sound waves enter the interior of these noise reduction grooves, the noise will be continuously reflected and refracted. The honeycomb structure of the noise reduction plate 302 can effectively reduce the intensity of the sound. A positioning groove with a rectangular structure is opened on the inner side of the first buffer sponge 301, and the noise reduction plate 302 is installed in the positioning groove. The positioning groove achieves the effect of positioning and hiding the noise reduction plate 302. Two symmetrically distributed second buffer sponges 303 are attached to the inner side of the noise reduction plate 302. The second buffer sponges 303 have a rectangular structure. The first buffer sponge 301, the noise reduction plate 302, and the second buffer sponge 303 work together to form the sound insulation structure 3. The inner side of the second buffer sponge 303 is in contact with the outer wall of the capacitor 1. The second buffer sponge 303 flexibly isolates the capacitor 1 and the noise reduction plate 302, so that the noise reduction plate 302 can effectively absorb the noise of the capacitor 1. The materials of the first buffer sponge 301 and the second buffer sponge 303 are respectively selected from the existing technology of sound insulation cotton material with good elasticity. The first buffer sponge 301 and the second buffer sponge 303 work together to further reduce the noise of the capacitor 1.

[0039] In this embodiment, a protective inner shell 202 is installed on the outer side of the first buffer sponge 301. There are two protective inner shells 202. A first protective outer shell 201 and a second protective outer shell 203 are respectively installed on the outer side of the protective inner shell 202. A sound insulation groove is formed between the first protective outer shell 201 and the protective inner shell 202, and a sound insulation groove is formed between the second protective outer shell 203 and the protective inner shell 202. The first protective outer shell 201, the protective inner shell 202, and the second protective outer shell 203 cooperate with each other to form a protective structure 2. The protective structure 2 provides sound insulation for the noise reduction plate 302 and the capacitor 1. Without protection, the operator uses an air evacuator in the existing technology to extract the air from the sound insulation groove, so that the sound insulation groove can form a vacuum space. The operator needs to weld the assembly positions of the first protective shell 201 and the protective inner shell 202, and the second protective shell 203 and the protective inner shell 202, so that the first protective shell 201 and the protective inner shell 202 form a whole, and the second protective shell 203 and the protective inner shell 202 form a whole. The assembly of the first protective shell 201 and the protective inner shell 202, and the second protective shell 203 and the protective inner shell 202 facilitates the formation of the sound insulation groove.

[0040] In this embodiment, two locking bolts 4 are installed on both sides of the first protective shell 201 and the second protective shell 203. Two threaded holes are opened on both sides of the first protective shell 201, and two bolt mounting holes are opened on both sides of the second protective shell 203. The locking bolts 4 pass through the bolt mounting holes and the threaded holes and are threadedly connected. Therefore, after the operator tightens the locking bolts 4, the first protective shell 201 and the second protective shell 203 can be firmly connected.

[0041] In this embodiment, two positioning sleeves are provided on each side of the second protective shell 203. A positioning rod 5 is inserted inside the positioning sleeve. An integral anti-loosening plate 501 is provided on one side of the positioning rod 5. A set of friction protrusions is provided on the upper part of the anti-loosening plate 501. The friction protrusions are arc-shaped. The structure of the anti-loosening plate 501, together with the second protective shell 203, can achieve the effect of circumferential positioning. Therefore, after the operator pushes the anti-loosening plate 501, the positioning rod 5 and the anti-loosening plate 501 can move laterally stably at the same time. After the operator pushes the anti-loosening plate 501 in the opposite direction, the locking bolt 4 can be unlocked. At this time, the locking bolt 4 can be installed and removed. A support spring is installed on the outer side of the positioning rod 5. The support spring pushes the anti-loosening plate 501 to reset and move above the locking bolt 4. At this time, the anti-loosening plate 501 can achieve the effect of quickly preventing the locking bolt 4 from loosening. An annular groove is opened on one side of the positioning rod 5. A retaining spring is installed at the position of the annular groove. The retaining spring achieves the effect of positioning the anti-loosening plate 501 at the reset position.

[0042] Example 2, based on Example 1, such as Figures 1-7As shown, this utility model takes the common CBB61 type AC motor running capacitor 1 as an example.

[0043] Example 3, based on Example 1, such as Figures 1-7 As shown, a bolt mounting hole is opened on each of the two sides of the first protective shell 201. The operator can install the corresponding screw at the bolt mounting hole. After the screw is installed, the installation position of the protective structure 2 can be stabilized.

[0044] The working principle of this embodiment:

[0045] Using an existing vacuum pump, the operator extracts the air from the soundproof grooves formed between the first protective outer shell 201 and the inner protective shell 202, and between the second protective outer shell 203 and the inner protective shell 202, to create a vacuum space. After extraction, the operator welds the assembly positions of the first protective outer shell 201 and the inner protective shell 202, and the second protective outer shell 203 and the inner protective shell 202, according to the welding process in the existing technology, so that they form a whole.

[0046] Assemble the sound insulation structure 3 and capacitor 1. The operator attaches the second buffer sponge 303 to both sides of the inner side of the noise reduction plate 302. The noise reduction plate 302 with the second buffer sponge 303 assembled is installed into the positioning groove inside the first buffer sponge 301. Then the first buffer sponge 301 is installed and hidden inside the protective inner shell 202. Then the first protective outer shell 201, the protective inner shell 202, and the second protective outer shell 203 are installed on the outer side of the capacitor 1.

[0047] Insert the positioning rod 5 into the positioning sleeves on both sides of the second protective housing 203, and install the support spring and snap ring. The operator pushes the anti-loosening plate 501 to move the positioning rod 5 and the anti-loosening plate 501 laterally, thereby removing the obstruction to the locking bolt 4. The locking bolt 4 is then threaded through the bolt mounting hole of the second protective housing 203 and threaded into the threaded hole of the first protective housing 201. The locking bolt 4 is then tightened with a screwdriver to complete the stable connection between the first protective housing 201 and the second protective housing 203, thus completing the noise reduction installation steps of the capacitor 1.

[0048] According to the actual use scenario, the assembled metallized polypropylene film capacitor 1 noise reduction device is installed into the corresponding equipment. If it is necessary to further fix the protective structure 2, the corresponding screws can be installed at the bolt mounting holes on both sides of the first protective shell 201 in accordance with the method of embodiment 3 to ensure that the entire device is installed in a stable position.

Claims

1. A noise reduction device for a metallized polypropylene film capacitor, comprising: The capacitor (1), the first protective shell (201) and the noise reduction plate (302) are provided. Two power lines are provided on one side of the capacitor (1). The capacitor (1) is characterized in that a noise reduction plate (302) is installed at the upper and lower positions of the capacitor (1). A first buffer sponge (301) is installed on the outer side of the noise reduction plate (302). A protective inner shell (202) is installed on the outer side of the first buffer sponge (301). There are two protective inner shells (202). A first protective shell (201) and a second protective shell (203) are installed on the outer side of the protective inner shell (202). Two locking bolts (4) are installed on both sides of the first protective shell (201) and the second protective shell (203). Two positioning sleeves are provided on both sides of the second protective shell (203). A positioning rod (5) is inserted inside the positioning sleeve.

2. The noise reduction device for a metallized polypropylene film capacitor according to claim 1, characterized in that, The first protective shell (201) has two threaded holes on each side, and the second protective shell (203) has two bolt mounting holes on each side. The locking bolt (4) passes through the bolt mounting hole and the threaded hole for threaded connection.

3. The noise reduction device for a metallized polypropylene film capacitor according to claim 1, characterized in that, A set of evenly distributed noise reduction grooves are opened on the inner side of the noise reduction plate (302).

4. The noise reduction device for a metallized polypropylene film capacitor according to claim 1, characterized in that, A positioning groove is formed on the inner side of the first buffer sponge (301), and the noise reduction plate (302) is installed inside the positioning groove.

5. The noise reduction device for a metallized polypropylene film capacitor according to claim 1, characterized in that, The inner side of the noise reduction plate (302) has two symmetrically distributed second buffer sponges (303) attached to both sides. The first buffer sponge (301), the noise reduction plate (302), and the second buffer sponge (303) work together to form a sound insulation structure (3). The inner side of the second buffer sponge (303) is in contact with the outer wall of the capacitor (1).

6. The noise reduction device for a metallized polypropylene film capacitor according to claim 1, characterized in that, A soundproof groove is formed between the first protective outer shell (201) and the protective inner shell (202), and a soundproof groove is formed between the second protective outer shell (203) and the protective inner shell (202). The first protective outer shell (201), the protective inner shell (202), and the second protective outer shell (203) cooperate with each other to form a protective structure (2).

7. The noise reduction device for a metallized polypropylene film capacitor according to claim 1, characterized in that, The positioning rod (5) has an integral anti-loosening plate (501) on one side, and a set of friction protrusions are provided above the anti-loosening plate (501).

8. The noise reduction device for a metallized polypropylene film capacitor according to claim 1, characterized in that, A support spring is installed on the outer side of the positioning rod (5), and an annular groove is opened on one side of the positioning rod (5), and a retaining ring is installed at the position of the annular groove.

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