Dynamic vibration absorber and air conditioner

Abstract

The utility model discloses a dynamic vibration absorber and an air conditioner, and relates to the technical field of vibration absorption equipment, and the dynamic vibration absorber comprises an elastic body structure and a balancing weight; the elastomer structure comprises a pipeline connecting part, an elastic part and a mounting part, the pipeline connecting part is used for fixing a pipeline, the elastic part is connected with the pipeline connecting part and the mounting part, and the mounting part is provided with a counterweight groove; and the counterweight block is arranged in the counterweight groove. According to the scheme, the vibration of the pipeline can be effectively attenuated on the premise of ensuring the production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of vibration absorption equipment technology, and in particular to a dynamic vibration absorber and an air conditioner. Background Technology

[0002] Air conditioner piping vibrates during operation, which can lead to breakage between adjacent pipes or at the connection between the pipe and the equipment. Currently, adding counterweights or vibration-damping adhesive to the piping reduces the structure's natural frequency, achieving vibration reduction. However, for piping systems with significant vibration, the vibration reduction effect of counterweights or vibration-damping adhesive is not ideal.

[0003] Based on the above-mentioned defects, in related technologies, dynamic vibration absorbers are used to reduce the vibration of pipelines. The dynamic vibration absorbers are installed on the pipeline with a split structure that is open on both sides. The structure is relatively complex and difficult to install, resulting in low production efficiency. Utility Model Content

[0004] The main purpose of this invention is to propose a dynamic vibration absorber and an air conditioner, which aims to effectively attenuate pipeline vibration while ensuring production efficiency.

[0005] To achieve the above objectives, this utility model proposes a dynamic vibration absorber, comprising:

[0006] An elastomer structure includes a pipe connection part, an elastic part, and an installation part. The pipe connection part is used to fix the pipe, the elastic part connects the pipe connection part and the installation part, and the installation part is provided with a counterweight groove.

[0007] The counterweight is located inside the counterweight groove.

[0008] In one embodiment, the pipe connection portion and the elastic portion are located on the same end face of the mounting portion, and the elastic portion is connected to the outer periphery of the pipe connection portion.

[0009] In one embodiment, the elastic portion includes a plurality of elastic units, which are distributed circumferentially at intervals along the pipeline connection portion.

[0010] In one embodiment, the elastic unit includes a first elastic segment and a second elastic segment arranged at an angle, the end of the first elastic segment away from the second elastic segment is connected to the outer periphery of the pipe connection portion, and the end of the second elastic segment away from the first elastic segment is connected to the end face of the mounting portion near the pipe connection portion.

[0011] In one embodiment, the pipe connection part is provided with a first channel, and the installation part is provided with a second channel. The first channel and the second channel are coaxially arranged, and the first channel and the second channel are used for pipes to pass through.

[0012] In one embodiment, the inner diameter of the first channel is smaller than the inner diameter of the second channel, the inner sidewall of the first channel is used to abut against the outer sidewall of the pipeline, and the inner sidewall of the second channel is used to be spaced apart from the outer sidewall of the pipeline.

[0013] In one embodiment, the outer side of the pipe connection is provided with a first opening extending into the first channel;

[0014] The outer side of the mounting part is provided with a second opening that extends to the second channel.

[0015] In one embodiment, a cable tie mounting groove is provided on the outer side of the pipe connection portion. The cable tie mounting groove extends circumferentially along the pipe connection portion and is used for cable ties to tighten the opening of the first opening.

[0016] In one embodiment, the mounting portion is provided with at least two counterweight slots, which are distributed at intervals along the circumference of the mounting portion, and a counterweight block is installed in each counterweight slot; a second opening is provided between two adjacent counterweight slots.

[0017] In one embodiment, the mounting portion includes:

[0018] Outer ring body, the elastic body connects the outer ring body and the pipeline connection part;

[0019] The inner ring body is located inside the outer ring body and forms the counterweight groove between the inner ring body and the outer ring body;

[0020] A connector that connects the outer ring body and the inner ring body.

[0021] In one embodiment, a limiting protrusion is provided on one side of the counterweight, and the limiting protrusion is engaged with the end of the mounting part for limiting.

[0022] To achieve the above objectives, this utility model also proposes an air conditioner, comprising:

[0023] The air conditioner unit is equipped with piping;

[0024] The dynamic vibration absorber described above is installed on the pipeline, and the pipeline connection part of the dynamic vibration absorber fixes the pipeline.

[0025] This invention's technical solution integrates the pipe connection and mounting parts through an elastic section, avoiding installation and positioning problems associated with split structures. It is particularly suitable for space-constrained environments such as air conditioning ducts, allowing direct pipe fixing via the connection to install the dynamic vibration absorber at a designated location. The structure is simple and easy to install, improving production efficiency. When the pipe vibrates, the connection transmits the vibration to the elastic section, causing it to deform and vibrate the counterweight via the mounting part. The elastic section and counterweight dissipate the vibration energy, effectively attenuating the pipe vibration. Therefore, this design effectively attenuates pipe vibration while maintaining production efficiency. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0027] Figure 1 A schematic diagram of a structural embodiment of the dynamic vibration absorber provided by this utility model;

[0028] Figure 2 An exploded view of an embodiment of the dynamic vibration absorber provided by this utility model;

[0029] Figure 3 A schematic diagram of the elastic body structure in one embodiment of the dynamic vibration absorber provided by this utility model;

[0030] Figure 4 A schematic diagram of the counterweight block in one embodiment of the dynamic vibration absorber provided by this utility model;

[0031] Figure 5 A dynamic model diagram of an embodiment of the dynamic shock absorber provided by this utility model when applied to a pipeline;

[0032] Figure 6 A comparison chart showing the vibration amplitude when a counterweight of the same weight and a dynamic vibration absorber are installed on the return air duct of an air conditioner.

[0033] Figure 7 This is a stress comparison diagram showing the installation of a counterweight of the same weight and a dynamic vibration absorber on the return air duct of an air conditioner.

[0034] Explanation of icon numbers:

[0035]

[0036]

[0037] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0039] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0040] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0041] Air conditioner piping vibrates during operation, which can lead to breakage between adjacent pipes or at the connection between the pipe and the equipment. Currently, adding counterweights or vibration-damping adhesive to the piping reduces the structure's natural frequency, achieving vibration reduction. However, for piping systems with significant vibration, the vibration reduction effect of counterweights or vibration-damping adhesive is not ideal.

[0042] Based on the above-mentioned defects, in related technologies, dynamic vibration absorbers are used to reduce the vibration of pipelines. The dynamic vibration absorbers are installed on the pipeline with a split structure that is open on both sides. The structure is relatively complex and difficult to install, resulting in low production efficiency.

[0043] To address the aforementioned problems, this invention proposes a dynamic vibration absorber 100, designed to effectively attenuate pipeline vibrations while ensuring production efficiency. The specific structure of the dynamic vibration absorber 100 will be described in detail below using embodiments.

[0044] Please see Figures 1 to 4 In one embodiment of the present invention, the dynamic vibration absorber 100 includes an elastic body structure 10 and a counterweight 20; the elastic body structure 10 includes a pipe connection part 11, an elastic part 12 and a mounting part 13, the pipe connection part 11 is used to fix the pipe, the elastic part 12 connects the pipe connection part 11 and the mounting part 13, the mounting part 13 is provided with a counterweight groove 13a; the counterweight 20 is disposed in the counterweight groove 13a.

[0045] In this embodiment, the pipe connection part 11 refers to a rigid load-bearing component with a tubular connection structure. Specifically, it can be implemented by metal stamping or injection molding. Its inner wall can be designed as a contact surface that matches the outer diameter of the pipe, and the pipe can be fixed by interference fit or fasteners.

[0046] The mounting section 13 refers to the bearing platform on which the mass adjustment module is installed. Its counterweight groove 13a can be designed as a rectangular groove or an annular groove. The depth of the groove can be adjusted according to the thickness of the counterweight 20 to limit the displacement of the counterweight 20.

[0047] The elastic part 12 refers to a connection structure with elastic deformation capability, which can be implemented using corrugated metal sheets, rubber bellows, springs, etc., to generate periodic deformation to dissipate energy when transmitting vibration. The counterweight 20 refers to an inertial mass body with adjustable density, which can be implemented using lead blocks, tungsten alloy blocks, or combined metal blocks. The size and material of the elastic part 12 determine the system stiffness of the dynamic vibration absorber 100, while the structural size and material of the counterweight 20 determine the mass of the dynamic vibration absorber 100. By changing the structural size and material of both, the vibration absorption frequency of the dynamic vibration absorber 100 can be adjusted to adapt to different piping systems and installation spaces, thereby achieving the ideal vibration absorption effect, minimizing piping vibration, and ensuring the reliability of the air conditioning system.

[0048] Specifically, after the pipe connection part 11 is rigidly connected to the air conditioning pipe, the pipe vibration is transmitted to the mounting part 13 through the elastic part 12. The elastic deformation of the elastic part 12 converts the vibration energy into elastic potential energy for initial attenuation, while simultaneously driving the mounting part 13 and the counterweight 20 to vibrate. This dissipates the pipe vibration energy through the elastic part 12 and the counterweight 20. Specifically, the natural frequency of the system can be changed by adjusting the mass of the counterweight 20 to match the dominant frequency of the pipe vibration. When the natural frequency of the dynamic vibration absorber 100 is consistent with the pipe vibration frequency, the elastic part 12 generates reverse vibration to offset the pipe vibration energy, achieving vibration amplitude attenuation. The mounting part 13 and the pipe connection part 11 can be an integrated design, avoiding vibration transmission efficiency loss caused by assembly errors in separate structures.

[0049] In summary, the technical solution of this utility model forms an integral structure between the pipe connection part 11 and the mounting part 13 through the elastic part 12, avoiding the installation and positioning problems caused by using a split structure. It is particularly suitable for space-constrained scenarios such as air conditioning pipes, allowing the pipe connection part 11 to be used directly to fix the pipe, thus installing the dynamic vibration absorber 100 at a designated location on the pipe. The structure is relatively simple and easy to install, improving production efficiency. When the pipe vibrates, the pipe connection part 11 transmits the vibration to the elastic part 12, causing the elastic part 12 to deform and drive the counterweight 20 to vibrate through the mounting part 13. The elastic part 12 and the counterweight 20 dissipate the vibration energy of the pipe, effectively attenuating the pipe vibration. Therefore, this design effectively attenuates pipe vibration while ensuring production efficiency.

[0050] Please see Figures 1 to 3 In one embodiment of the present invention, the pipe connection part 11 and the elastic part 12 are located on the same end face of the mounting part 13, and the elastic part 12 is connected to the outer periphery of the pipe connection part 11.

[0051] In this embodiment, the same end face layout means that the pipeline connection part 11 and the elastic part 12 are concentrated at one end of the mounting part 13. Specifically, it can be achieved by integrated injection molding or welding process to form an axially compact assembly interface.

[0052] This configuration, by integrating the pipe connection portion 11 and the elastic portion 12 onto the same end face of the mounting portion 13, creates a compact, integrated layout for the mounting portion 13, the pipe connection portion 11, and the elastic portion 12. The design of the elastic portion 12 surrounding the outer periphery of the pipe connection portion 11 allows for the uniform distribution of stress during vibration transmission through circumferentially distributed elastic support, thereby improving vibration absorption. This layout not only simplifies the overall structure but also allows for installation with only single-sided positioning to fix the connection portion to the pipe, significantly reducing assembly difficulty. Simultaneously, the peripheral connection method increases the contact area between the elastic portion 12 and the pipe connection portion 11, which is beneficial for improving connection stiffness and fatigue resistance.

[0053] Please see Figure 3 In one embodiment of the present invention, the elastic part 12 includes a plurality of elastic units 12a, which are distributed circumferentially along the pipeline connection part 11.

[0054] In this embodiment, the elastic unit 12a refers to a single-unit structure that independently generates elastic deformation. Specifically, it can be implemented using elastic structures such as metal springs, springs, or rubber blocks. Each elastic unit 12a has independent vibration absorption capabilities. The circumferential spacing distribution means that each unit is arranged in a ring around the axial centerline of the pipe connection part 11, and an interval region is formed between adjacent units. The interval distance can be uniformly distributed or non-uniformly distributed.

[0055] This configuration, by designing the elastic part 12 as multiple circumferentially spaced elastic units 12a, allows vibration energy to be dispersed and absorbed by the elastic units 12a in different directions, preventing deformation saturation or failure of a single elastic body due to concentrated force. The circumferentially spaced layout enhances the adaptability of the elastic part 12 to multi-directional vibrations, while the discrete structure reduces mechanical interference between units and improves the overall coordination of elastic deformation. This distribution also optimizes the space utilization of the elastic units 12a, reducing the structural volume while ensuring vibration absorption performance, and facilitating assembly with the pipe connection part 11.

[0056] Please see Figure 3 In one embodiment of the present invention, the elastic unit 12a includes a first elastic segment 121 and a second elastic segment 122 arranged at an angle. The end of the first elastic segment 121 away from the second elastic segment 122 is connected to the outer periphery of the pipe connection portion 11, and the end of the second elastic segment 122 away from the first elastic segment 121 is connected to the end face of the mounting portion 13 near the pipe connection portion 11.

[0057] In this embodiment, the first elastic segment 121 refers to an elastic structure that connects to the outer periphery of the pipe connection portion 11 and extends radially along the pipe connection portion 11. Specifically, it can be implemented using a plate-like, strip-like, or block-like structure. Its function is to convert the vibration energy transmitted by the pipe into elastic deformation. The second elastic segment 122 refers to an elastic structure that forms an angle with the first elastic segment 121 and extends to the end face of the mounting portion 13. Specifically, it can also be implemented using a plate-like, strip-like, or block-like structure. Its function is to extend the vibration transmission path through a bending deformation path. The angle setting refers to the formation of a non-straight transition bending structure between the two elastic segments. Its function is to increase the multi-directional dissipation of vibration energy through path bending.

[0058] Specifically, the direct connection between the first elastic segment 121 and the outer periphery of the pipeline connection 11 forms a receiving end for vibration input, generating radial deformation when the pipeline vibrates. The second elastic segment 122 uses an angled structure as a deformation inflection point, transforming the radial deformation of the first elastic segment 121 into a composite deformation of axial and tangential directions.

[0059] This design, by creating a two-segment elastic structure with an included angle for the elastic unit 12a, achieves graded transmission and absorption of vibration energy. The first elastic segment 121, starting from the outer periphery of the pipe connection 11, converts the vibration energy transmitted by the pipe into elastic deformation. The second elastic segment 122, through the included angle structure, forms a turning point in the elastic deformation path, transmitting the deformation energy to the end face of the mounting portion 13. This segmented design not only extends the vibration transmission path through the included angle structure to improve energy dissipation efficiency, but also, by fixing both ends to the pipe connection 11 and the mounting portion 13 respectively, maintains the overall compactness of the elastic body structure while avoiding the problem of insufficient stiffness caused by excessive length in a single elastic segment. The direct connection between the first elastic segment 121 and the outer periphery of the pipe connection 11 enhances the transmission efficiency of vibration input, while the connection between the second elastic segment 122 and the end face of the mounting portion 13 improves the torsional resistance of the elastic unit 12a through end face support, ensuring the phase matching stability between the counterweight 20 and the pipe vibration.

[0060] Please see Figure 1 , Figure 3 In one embodiment of the present invention, the pipe connection part 11 is provided with a first channel 11a, and the mounting part 13 is provided with a second channel 13b. The first channel 11a and the second channel 13b are coaxially arranged, and the first channel 11a and the second channel 13b are used for pipes to pass through.

[0061] In this embodiment, the first channel 11a refers to a through structure disposed inside the pipe connection portion 11 to constrain the axial and radial position of the pipe. Specifically, it can be implemented using a circular hole with an inner diameter matching the outer diameter of the pipe, and its function is to eliminate misalignment when fixing the pipe. The second channel 13b refers to an extended support structure disposed inside the mounting portion 13 and coaxial with the first channel 11a, and its function is to provide continuous axial support for the pipe.

[0062] Specifically, during installation, the pipeline passes through the coaxial through space of the first channel 11a and the second channel 13b in sequence.

[0063] This configuration, using a coaxial first channel 11a and a second channel 13b, enables through-type installation of the pipeline within the vibration absorber. The first channel 11a of the pipeline connection 11 maintains axial positioning when the pipeline is fixed, while the second channel 13b of the mounting part 13 provides extended support for the pipeline. The coaxial relationship between the two ensures that the axis of the pipeline remains consistent during installation, avoiding vibration transmission path deviation caused by installation errors. The cooperative design of the first channel 11a and the second channel 13b not only simplifies the overall structure of the vibration absorber but also allows the pipeline to be quickly inserted without additional adjustments, significantly improving assembly efficiency. Simultaneously, the continuous support structure formed by the coaxial channels can constrain the vibration direction of the pipeline, enhancing the vibration absorber's attenuation effect on vibrations of specific frequencies.

[0064] Please see Figure 1 , Figure 3 In one embodiment of the present invention, the inner diameter of the first channel 11a is smaller than the inner diameter of the second channel 13b, the inner sidewall of the first channel 11a is used to abut against the outer sidewall of the pipeline, and the inner sidewall of the second channel 13b is used to be spaced apart from the outer sidewall of the pipeline.

[0065] In this embodiment, the first channel 11a can be specifically formed by integrally molding an elastomer material into a channel with a diameter slightly smaller than the outer diameter of the pipe, generating clamping force through the elastic deformation of the material. The second channel 13b can be specifically formed by an annular space with a diameter larger than the outer diameter of the pipe, creating a vibration buffer area. Specifically, when the pipe passes through the first channel 11a, since the inner diameter of the first channel 11a is slightly smaller than the outer diameter of the pipe, the elastomer material undergoes radial deformation and forms an interference fit with the pipe, generating a continuous normal contact force to achieve axial fixation. At this time, a uniform gap is formed between the second channel 13b and the outer wall of the pipe, so that there is no direct contact between the mounting part 13 and the pipe.

[0066] This configuration achieves dual functions through the use of channel structures with differentiated inner diameters. The smaller inner diameter of the first channel 11a allows its inner wall to fit tightly against the pipeline, clamping and fixing the pipeline in place. The larger inner diameter of the second channel 13b creates a space between it and the pipeline, providing a buffer area for the radial deformation of the elastic part 12. At the same time, it prevents direct contact between the mounting part 13 and the pipeline, avoiding friction between the dynamic vibration absorber 100 and the pipeline during vibration, thus preventing damage to both the pipeline and the dynamic vibration absorber 100.

[0067] In some embodiments, the gap between the inner wall of the second channel 13b and the outer side of the pipe is greater than 5mm, that is, the inner diameter of the second channel 13b is greater than the pipe diameter by more than 5mm. This can better prevent the dynamic vibration absorber 100 from rubbing against the pipe during vibration and effectively prevent damage to the pipe and the dynamic vibration absorber 100.

[0068] Please see Figure 1 , Figure 3 In one embodiment of the present invention, the outer side of the pipe connection part 11 is provided with a first opening 11b that extends to the first channel 11a; the outer side of the mounting part 13 is provided with a second opening 13c that extends to the second channel 13b.

[0069] In this embodiment, the first opening 11b refers to a through-groove structure provided on the side wall of the pipe connection part 11. Specifically, it can be implemented by using a U-shaped groove, a C-shaped groove, or a groove of other shapes that extend axially. The radial expansion of the first channel 11a is increased by the elastic deformation of the groove opening. The second opening 13c refers to a through-groove structure provided on the side wall of the mounting part 13. Specifically, it can be implemented by using a straight groove, an arc-shaped groove, or a groove of other shapes that extend axially. The radial space of the second channel 13b is adjusted by the elastic deformation of the groove opening.

[0070] Specifically, during pipe installation, the elastic deformation of the first opening 11b allows the inner diameter of the first channel 11a to expand elastically. After the pipe passes through the first channel 11a, the first opening 11b elastically recovers, clamping and fixing the pipe. Similarly, the elastic deformation of the second opening 13c allows the inner diameter of the second channel 13b to expand elastically. After the pipe passes through the second channel 13b, the second opening 13c elastically recovers.

[0071] This design, with a first opening 11b extending into the internal channel at the pipe connection 11, allows the inner diameter of the first channel 11a to expand during installation through the elastic deformation of the first opening 11b. This facilitates a secure connection after the pipe is inserted, utilizing the elastic restoring force of the first opening 11b. It also avoids the complex assembly processes required by traditional split-type structures and can accommodate pipes of different sizes. Similarly, a second opening 13c extending into the second channel 13b is provided on the outer side of the mounting part 13. This also allows the inner diameter of the second channel 13b to expand through the elastic deformation of the second opening 13c during installation, facilitating pipe passage through the second channel 13b and accommodating pipes of different sizes. The coordinated design of the first opening 11b and the second opening 13c achieves a compact design for a single-piece integrated structure and overcomes the technical contradiction that traditional integrated vibration absorbers cannot simultaneously satisfy pipe fixing and counterweight installation through the elastic opening structure.

[0072] Please see Figure 1 , Figure 3 In one embodiment of the present invention, a cable tie mounting groove 11c is provided on the outer side of the pipe connection part 11. The cable tie mounting groove 11c extends circumferentially along the pipe connection part 11 and is used for cable ties to tighten the opening of the first opening 11b.

[0073] In this embodiment, the cable tie mounting groove 11c refers to an annular groove formed on the outside of the pipe connection portion 11. It can be implemented by injection molding or machining. The width and depth of the cable tie mounting groove 11c can be adapted to the standard cable tie size. This structure concentrates the radial pressure generated when the cable tie is bundled on both sides of the first opening 11b, thereby changing the clamping force of the pipe connection portion 11.

[0074] With this configuration, the circumferentially extending cable tie mounting groove 11c provided on the outer side of the pipe connection part 11 allows the cable tie to apply radial pressure evenly. The opening and closing degree of the first opening 11b can be dynamically adjusted by binding the cable tie. When the pipe diameter changes, only the binding force of the cable tie needs to be adjusted to achieve rapid fastening of the pipe connection part 11 without disassembling or replacing parts. This allows the pipe connection part 11 to adapt to the fastening requirements of different pipe diameters, solving the problem of complex installation of traditional split structures.

[0075] Please see Figures 1 to 4 In one embodiment of the present invention, the mounting part 13 is provided with at least two counterweight grooves 13a, the at least two counterweight grooves 13a are distributed at intervals along the circumference of the mounting part 13, and a counterweight block 20 is installed in each counterweight groove 13a; a second opening 13c is provided between two adjacent counterweight grooves 13a.

[0076] In this embodiment, the counterweight groove 13a refers to an independent accommodating space arranged around the mounting part 13. Specifically, it can be formed using a split mold, and the volume of each counterweight groove 13a can be designed to be the same or different. The second opening 13c between adjacent counterweight grooves 13a retains the original second channel 13b channel through which the pipes of the mounting part 13 pass, to avoid the second channel 13b being blocked due to the installation of the counterweight block 20.

[0077] The multiple counterweight slots 13a provided in the mounting section 13 allow for selection of the number and installation position of the counterweights 20 based on the vibration frequency characteristics. For example, four counterweights 20 can be symmetrically installed under low-frequency vibration conditions, while only two diagonally distributed counterweights 20 can be installed under high-frequency vibration conditions. The second opening 13c between adjacent counterweight slots 13a provides independent installation space for the counterweights 20 while retaining the pipeline maintenance channel on the outside of the mounting section 13, preventing the installation of the counterweights 20 from affecting pipeline maintenance operations.

[0078] This configuration, with multiple circumferentially spaced counterweight grooves 13a provided in the mounting section 13, allows for changes in the vibration absorption frequency characteristics by increasing or decreasing the number of counterweights 20 or adjusting their installation positions, overcoming the limitation of a single counterweight groove 13a having a limited adjustment range. A specially designed second opening 13c is provided between adjacent counterweight grooves 13a, ensuring the stability of the counterweight installation while retaining the second opening 13c on the outside of the mounting section 13. This avoids the impact of the counterweight installation on the pipe penetration space, maintaining the maintainability of the piping system.

[0079] Please see Figure 3 In one embodiment of the present invention, the mounting part 13 includes an outer ring body 131, an inner ring body 132, and a connecting body 133; an elastic body connects the outer ring body 131 and the pipeline connection part 11; the inner ring body 132 is disposed on the inner side of the outer ring body 131 and forms a counterweight groove 13a between the inner ring body 131 and the outer ring body 131; the connecting body 133 connects the outer ring body 131 and the inner ring body 132.

[0080] In this embodiment, the outer ring 131 refers to the annular structure surrounding the outside of the mounting part 13. Specifically, it can be made of metal or high-strength plastic through an integral molding process, and is used to form a stable connection interface with the elastomer and the pipeline connection part 11.

[0081] The inner ring body 132 refers to the internal annular structure arranged coaxially with the outer ring body 131. Specifically, it can be formed by processing simultaneously with the outer ring body 131, and is used to cooperate with the outer ring body 131 to form an annular channel for accommodating the counterweight 20.

[0082] The connecting body 133 refers to the support structure set between the outer ring body 131 and the inner ring body 132. Specifically, it can be implemented by ribs or partitions evenly distributed along the circumference, which is used to maintain the relative position of the inner and outer ring bodies 131 and enhance the structural rigidity.

[0083] This configuration, through the combined structure of the outer ring 131, the inner ring 132, and the connector 133, achieves an integrated design of the counterweight groove 13a. The outer ring 131 is connected to the pipeline connection 11 via an elastic body, ensuring effective control of the vibration transmission path. The counterweight groove 13a is formed between the inner ring 132 and the outer ring 131, making the spatial layout of the counterweight block 20 more compact and avoiding the assembly complexity caused by the split structure. The connector 133 fixes the outer ring 131 and the inner ring 132 into one unit, enhancing the overall strength of the mounting part 13 and preventing structural deformation caused by vibration.

[0084] Please see Figure 4 In one embodiment of the present invention, a limiting protrusion 21 is provided on one side of the counterweight 20, and the limiting protrusion 21 is matched with the end of the mounting part 13 for limiting.

[0085] In this embodiment, the limiting protrusion 21 refers to a boss structure extending outward from the surface of the counterweight 20. Specifically, it can be implemented as a protrusion integrally cast with the counterweight 20, used to form a mechanical limit with the groove or edge of the end of the mounting part 13. After the counterweight 20 is installed into the counterweight groove 13a, the limiting protrusion 21 is embedded in the preset limiting groove at the end of the mounting part 13 or abuts against the edge of the end face, so that the counterweight 20 cannot move axially during vibration.

[0086] With this configuration, the limiting protrusion 21 on the counterweight 20 forms a limiting fit with the end of the mounting part 13, ensuring that the counterweight 20 does not undergo axial displacement in the groove, avoiding loosening and falling off due to vibration or external force, and further improving the stability of the vibration absorption effect.

[0087] This utility model also proposes an air conditioner, which includes an air conditioner body and a dynamic vibration absorber 100. The specific structure of the dynamic vibration absorber 100 is as described in the above embodiments. Since this air conditioner adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here. The air conditioner body is provided with pipes; the dynamic vibration absorber 100 is installed on the pipes, and the pipe connection part 11 of the dynamic vibration absorber 100 fixes the pipes.

[0088] In this embodiment, the air conditioner body refers to the main structure of the air conditioning system, which includes a compressor, condenser, and connecting pipes. The pipe system generates periodic mechanical vibrations during operation. The dynamic vibration absorber 100 can be installed in the middle section or at a bend in the pipe where the vibration amplitude is greatest.

[0089] Understandably, the dynamic vibration absorber 100 is rigidly fixed to the air conditioning pipeline via the pipeline connection part 11, directly transmitting pipeline vibration to the elastic structure 10. The elastic part 12 undergoes periodic deformation under vibration, driving the counterweight 20 to generate a reverse inertial force, thereby offsetting the pipeline vibration energy. This solution overcomes the limitations of traditional split-type vibration absorbers that require partial disassembly and installation, adopting an integrated assembly method. This eliminates the need for additional positioning or splicing between the vibration absorber and the pipeline, requiring only a single connection structure for fixation. This integrated design allows vibration attenuation to be directly applied to the pipeline vibration transmission path, while avoiding the loss of vibration reduction efficiency caused by assembly errors in split structures.

[0090] Compared to existing technologies, traditional dynamic vibration absorbers 100 employ a split-shell structure, requiring the piping to be encased within two semi-shells before bolting, resulting in complex assembly processes and potential installation gaps. This solution, however, utilizes an integrated design of the integral piping connection 11 and the elastomer, allowing the vibration absorber to be directly installed on the piping via a sleeve connection, significantly simplifying the installation process. Furthermore, compared to passive vibration reduction methods that simply add counterweights 20 or anti-vibration rubber, this solution, through the dynamic coupling between the elastomer and the counterweights 20, achieves active absorption of vibration energy across a wider frequency range, avoiding new resonance problems caused by changes in the natural frequency.

[0091] In some embodiments, when the dynamic vibration absorber 100 provided in this solution is used to absorb vibration in a pipeline, the dynamic model of the dynamic vibration absorber 100 can follow the following rules:

[0092] This utility model is based on Figure 5 The dynamic model has the following vibration differential equation:

[0093] Mx1”+cx1’+(K+k)x1-cx2’-kx2=f=Fsinωt

[0094] mx2”-cx1'-kx1+cx2'+kx2=0

[0095] The solution yields:

[0096]

[0097] Among them, X ST =F / M is the static deformation of the main system, μ is the mass ratio, ξ is the damping ratio, γ is the natural frequency ratio of the main system, λ is the forced vibration frequency ratio, X1 is the vibration of the pipeline, X2 is the vibration of the dynamic vibration absorber 100, k is the elastic coefficient of the elastic part 12 of the dynamic vibration absorber 100, K is the elastic coefficient between the pipeline and the structure connected to it, m is the weight of the dynamic vibration absorber 100, and M is the weight of the pipeline. From the above formula, it can be seen that when X1 is minimized (i.e., the vibration of the pipeline), the dynamic vibration absorber 100 has the best effect. Obviously, when the other parameters remain unchanged and γ = λ, X1 is minimized. Based on the above theory, the various parameters of the dynamic vibration absorber 100 are determined.

[0098] In addition, from Figure 6 and Figure 7 Experimental data show that, for the same weight, the maximum vibration and stress of the air conditioning pipeline when the dynamic vibration absorber 100 is installed are reduced by more than 50% compared with those when the counterweight 20 is installed. This experimental result indicates that, compared with traditional vibration reduction measures for air conditioning systems such as the counterweight 20, this invention can more effectively reduce the vibration of the pipeline system, decrease pipeline stress, and improve pipeline reliability.

[0099] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A dynamic vibration absorber, characterized in that, include: An elastomer structure includes a pipe connection part, an elastic part, and an installation part. The pipe connection part is used to fix the pipe, the elastic part connects the pipe connection part and the installation part, and the installation part is provided with a counterweight groove. The counterweight is located inside the counterweight groove.

2. The dynamic vibration absorber as described in claim 1, characterized in that, The pipe connection part and the elastic part are located on the same end face of the mounting part, and the elastic part is connected to the outer periphery of the pipe connection part.

3. The dynamic vibration absorber as described in claim 2, characterized in that, The elastic part includes multiple elastic units, which are distributed circumferentially along the pipeline connection.

4. The dynamic vibration absorber as described in claim 3, characterized in that, The elastic unit includes a first elastic segment and a second elastic segment arranged at an angle. The end of the first elastic segment away from the second elastic segment is connected to the outer periphery of the pipe connection part, and the end of the second elastic segment away from the first elastic segment is connected to the end face of the mounting part near the pipe connection part.

5. The dynamic vibration absorber as described in claim 2, characterized in that, The pipeline connection part is provided with a first channel, and the installation part is provided with a second channel. The first channel and the second channel are coaxially arranged, and the first channel and the second channel are used for pipelines to pass through.

6. The dynamic vibration absorber as described in claim 5, characterized in that, The inner diameter of the first channel is smaller than the inner diameter of the second channel. The inner sidewall of the first channel is used to abut against the outer sidewall of the pipeline, and the inner sidewall of the second channel is used to be spaced apart from the outer sidewall of the pipeline.

7. The dynamic vibration absorber as described in claim 5, characterized in that, The outer side of the pipe connection is provided with a first opening that extends to the first channel; The outer side of the mounting part is provided with a second opening that extends to the second channel.

8. The dynamic vibration absorber as described in claim 7, characterized in that, The outer side of the pipe connection is also provided with a cable tie mounting groove, which extends circumferentially along the pipe connection and is used for cable ties to tighten the opening of the first opening.

9. The dynamic vibration absorber as described in claim 7, characterized in that, The mounting part is provided with at least two counterweight slots, which are distributed at intervals along the circumference of the mounting part. Each counterweight slot contains a counterweight block. There is a second opening between two adjacent counterweight slots.

10. The dynamic vibration absorber as described in any one of claims 1 to 9, characterized in that, The mounting unit includes: Outer ring body, the elastic body connects the outer ring body and the pipeline connection part; The inner ring body is located inside the outer ring body and forms the counterweight groove between the inner ring body and the outer ring body; A connector that connects the outer ring body and the inner ring body.

11. The dynamic vibration absorber as described in any one of claims 1 to 9, characterized in that, The counterweight has a limiting protrusion on one side, which engages with the end of the mounting part for limiting.

12. An air conditioner, characterized in that, include: The air conditioner unit is equipped with piping; The dynamic vibration absorber as described in any one of claims 1 to 11 is installed on the pipeline, and the pipeline connection portion of the dynamic vibration absorber fixes the pipeline.

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