Vibration absorber and compressor having the same

Abstract

The present invention provides a vibration absorber and a compressor having the vibration absorber, wherein the vibration absorber comprises a mass block and an elastic member; the elastic member and the mass block are coaxially arranged with the vibration member, and in the radial direction of the vibration member, the vibration member, the elastic member and the mass block are sequentially connected from the inside to the outside, and the mass block is used to perform a first vibration absorption on the radial vibration of the vibration member; the mass block comprises an acoustic black hole structure, and the acoustic black hole structure is connected to the outer wall of the elastic member, and the acoustic black hole structure is used to perform a second vibration absorption on the radial vibration of the vibration member. The acoustic black hole structure of the present invention can absorb the vibration that cannot be absorbed or is incompletely absorbed in the first vibration absorption for a second time, which greatly broadens the vibration absorption frequency range of the vibration absorber.

Description

Technical Field

[0001] The invention belongs to the technical field of compressors, and in particular relates to a vibration absorber and a compressor having the vibration absorber. Background Art

[0002] The compressor is one of the important power sources of the air conditioning system, and its vibration and noise level directly affects the overall noise performance level of the air conditioning system. Due to the eccentric setting of the liquid distributor in the compressor, its vibration level is generally greater than the shell vibration. The liquid distributor is connected to the compressor shell through a bracket and an elbow. The elbow section contains a long straight pipe. The high vibration of the long straight pipe has always been a difficult problem that plagues the vibration and noise of the compressor.

[0003] Related art discloses adding a wedge-shaped portion to the dispenser bracket, and as the thickness of the wedge-shaped portion decreases, the broadband sound waves are gathered to reduce the vibration response of the dispenser to the housing. This structure is simple and reasonable, but has a small scope of application and can only absorb vibration within a certain frequency range. Summary of the invention

[0004] The present invention provides a vibration absorber and a compressor having the vibration absorber, which can solve the technical problem that the vibration absorption frequency range of the existing vibration absorber is narrow.

[0005] The present invention provides a vibration absorber, which includes a mass block and an elastic member;

[0006] The elastic member and the mass block are coaxially arranged with the vibrating member. In the radial direction of the vibrating member, the vibrating member, the elastic member and the mass block are sequentially connected from the inside to the outside, and the mass block is used to perform a first vibration absorption on the radial vibration of the vibrating member.

[0007] The mass block comprises an acoustic black hole structure, which is connected to the outer wall of the elastic member, and is used for performing a second vibration absorption on the radial vibration of the vibrating member.

[0008] In some embodiments, taking the longitudinal section of the mass block as a projection plane, the thickness of the acoustic black hole structure gradually decreases along the vibration propagation direction, and the thickness of the acoustic black hole structure decreases in a power exponential form.

[0009] In some embodiments, taking the longitudinal section of the mass block as the projection plane, the acoustic black hole structure has a first end and a second end, the thickness of the first end is greater than the thickness of the second end, and the vibration propagates from the first end to the second end; the mass block also includes a damping ring, and the damping ring is provided on the inner wall of the first end or the inner wall of the second end.

[0010] In some embodiments, the acoustic black hole structure includes a uniform portion and a variable cross-section portion that are interconnected, the uniform portion is connected to the outer wall of the elastic member, one end of the variable cross-section portion is connected to the axial outer edge of the uniform portion, and the other end of the variable cross-section portion extends toward the second end portion, and the thickness of the variable cross-section portion gradually decreases from this end toward the second end portion, and the damping ring is arranged on the end of the variable cross-section portion extending toward the second end portion; the variable cross-section of the variable cross-section portion faces the elastic member, and a gathering cavity is formed between the variable cross-section of the variable cross-section portion and the elastic member.

[0011] In some embodiments, a plurality of dividing grooves are provided on the variable cross-section portion, and the plurality of dividing grooves are arranged at intervals, and the first end of the dividing groove is at the connection between the variable cross-section portion and the uniform portion, and the second end of the dividing groove is at the second end portion, so that the variable cross-section portion is divided into a plurality of sub-variable cross-section portions.

[0012] In some embodiments, taking the longitudinal section of the mass block as a projection plane, an angle is formed between a line connecting the first end of the separation groove to the second end of the separation groove and a horizontal line in a horizontal direction, and the angle ranges from 30° to 90°.

[0013] In some embodiments, the acoustic black hole structure includes a uniform portion and a variable cross-section portion that are connected to each other, the uniform portion is connected to the outer wall of the elastic member, one end of the variable cross-section portion is connected to the radial outer edge of the uniform portion, the other end of the variable cross-section portion extends outward in the radial direction of the elastic member, and the damping ring is arranged on the end of the variable cross-section portion extending outward in the radial direction of the elastic member.

[0014] In some embodiments, the acoustic black hole structure is ring-shaped and has a gap, which breaks the acoustic black hole structure so that the acoustic black hole structure has a first section and a second section separated from each other.

[0015] In some embodiments, the acoustic black hole structure is snap-fitted with the elastic member, and the acoustic black hole structure and the elastic member are interference fit.

[0016] A compressor comprises a vibration absorber and a liquid separator, wherein the vibration absorber is the above-mentioned vibration absorber, and a pipe is vertically arranged in the liquid separator, and the pipe is the vibration member.

[0017] The present invention provides a vibration absorber and a compressor having the vibration absorber, which have the following beneficial effects:

[0018] The radial movement of the vibrating part and the radial movement of the mass block constitute a two-degree-of-freedom system. The mass block cooperates with the elastic part to absorb vibration of the vibrating part. However, considering the characteristics of the vibration absorber, the vibration absorption frequency bandwidth is small, and the corresponding vibration suppression ability outside the resonance frequency is weak. In addition to playing a role in the primary vibration absorption, the mass block includes an acoustic black hole structure. When the sound wave propagates in the acoustic black hole, the acoustic black hole structure can perform a secondary vibration absorption on the vibration that cannot be absorbed or incompletely absorbed in the primary vibration absorption, thereby greatly broadening the vibration absorption frequency range of the vibration absorber to solve the technical problem of the narrow vibration absorption frequency range of the existing vibration absorber. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0020] Figure 1 This is a schematic diagram of a vibration absorber according to an embodiment of the present invention being arranged in a liquid dispenser;

[0021] Figure 2 is a schematic diagram of a vibration absorber according to an embodiment of the present invention;

[0022] Figure 3 is a schematic diagram of an acoustic black hole structure according to an embodiment of the present invention;

[0023] Figure 4 A top view of the acoustic black hole structure according to an embodiment of the present invention

[0024] Figure 5 A schematic diagram of a uniform portion and a variable cross-section portion according to an embodiment of the present invention;

[0025] Figure 6 is a schematic diagram of a separation groove according to an embodiment of the present invention;

[0026] Figure 7 A schematic diagram of an acoustic black hole structure according to another embodiment of the present invention;

[0027] Figure 8 The schematic diagram of a two-degree-of-freedom system formed by the radial movement of the straight tube and the radial movement of the mass block in the embodiment of the present invention;

[0028] Fig. 9 Schematic diagram of a vibration absorber according to an embodiment of the present invention being arranged on a straight pipe.

[0029] Figures: 1-mass block; 2-elastic member; 3-acoustic black hole structure; 31-first end; 32-second end 301-uniform portion; 302-variable cross-section portion; 321-dividing groove; 322-sub-variable cross-section portion; 303-notch; 331-first section; 332-second section; 4-damping ring; 5-vibrating member; 6-bend pipe. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0032] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0033] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0034] See also Figure 1 and 2 As shown, according to an embodiment of the present invention, a vibration absorber is provided, which includes a mass block 1 and an elastic member 2; the elastic member 2 and the mass block 1 are coaxially arranged with the vibration member 5, and in the radial direction of the vibration member 5, the vibration member 5, the elastic member 2 and the mass block 1 are sequentially connected from the inside to the outside, and the mass block 1 is used to perform a first vibration absorption on the radial vibration of the vibration member 5; the mass block 1 includes an acoustic black hole structure 3, the acoustic black hole structure 3 is connected to the outer wall of the elastic member 2, and the acoustic black hole structure 3 is used to perform a second vibration absorption on the radial vibration of the vibration member 5.

[0035] It is worth noting that the vibrator 5 is a rotating machine. When the vibrator 5 is subjected to an external excitation force, the vibrator 5 will be displaced in the radial direction, thereby generating vibration. The vibration absorber is a device that transfers the vibration of the main system to the auxiliary system. The main system is the vibrator 5, and the auxiliary system is the vibration absorber. The natural frequency of the vibration absorber needs to be close to the natural frequency of the vibrator 5. The vibration absorber can greatly absorb the vibration at the natural frequency of the vibrator 5.

[0036] Specifically, when the vibration member 5 vibrates, the vibration member 5 is displaced in the radial direction, and the elastic member 2 and the mass block 1 form a vibration absorber. The elastic member 2 is connected to the vibration member 5, and the vibration of the vibration member 5 is transmitted to the elastic member 2. The elastic member 2 transmits the vibration to the mass block 1. Since the elastic member 2 has elastic force, the mass block 1 is also displaced, so that the external exciting force on the vibration member 5 and the elastic restoring force of the vibration absorber cancel each other out. This is the first vibration absorption of the radial vibration of the vibration member 5 by the vibration absorber. Since the radial vibration wave of the vibration member 5 will also be transmitted to the acoustic black hole structure 3, the wave gathering effect of the acoustic black hole structure 3 is used to gather the sound wave in the acoustic black hole for consumption. This is the second vibration absorption of the radial vibration of the vibration member 5 by the acoustic black hole structure 3. After two vibration absorptions, the radial vibration of the vibration member 5 no longer vibrates.

[0037] In this embodiment, the radial movement of the vibration member 5 and the radial movement of the mass block 1 constitute a two-degree-of-freedom system. The mass block 1 cooperates with the elastic member 2 to absorb vibration of the vibration member 5. However, considering the characteristics of the vibration absorber, the vibration absorption frequency bandwidth is small, and the corresponding vibration suppression capability outside the resonance frequency is weak. In addition to playing a role in the primary vibration absorption, the mass block 1 includes an acoustic black hole structure 3. When the sound wave propagates in the acoustic black hole structure 3, the acoustic black hole structure 3 can perform a secondary vibration absorption on the vibration that cannot be absorbed or is incompletely absorbed in the primary vibration absorption, thereby greatly broadening the vibration absorption frequency range of the vibration absorber to solve the technical problem of the narrow vibration absorption frequency range of the existing vibration absorber.

[0038] As a specific implementation, the elastic member 2 is a sponge or rubber. To prevent the elastic member 2 from loosening from the vibrating member 5, a glue layer is provided between the elastic member 2 and the vibrating member 5, or the elastic member 2 is connected to the vibrating member 5 by bolts, or a groove is provided on the vibrating member 5, and the elastic member 2 is stuck in the groove. In this embodiment, the elastic member 2 is set as an elastic member such as a sponge or rubber, which reduces the size of the vibration absorber and makes it more compact.

[0039] It is worth noting that, in conjunction with Figure 8 and Fig. 9 As shown, the vibrating member 5 in this embodiment is a straight tube in the liquid dispenser. Since the straight tube is connected to the curved tube 6, the straight tube has a problem of large vibration. The straight tube is the main system M1, and the mass block 1 is the additional system M2. The radial movement of the straight tube and the radial movement of the mass block 1 constitute a two-degree-of-freedom system. The process and principle of the mass block 1 in the first vibration absorption process are as follows:

[0040] When the main system M1 is subjected to radial vibration from the elbow 6, the main system M1 is subjected to an external excitation force F(t)=F1e -jwt , the straight pipe and the curved pipe 6 are welded, but when the compressor is running, the straight pipe and the curved pipe 6 will have a radial relative displacement, the radial displacement is X1, and the stiffness is k1. At this time, the curved pipe 6 and the straight pipe can be considered to be connected by a spring with a large stiffness. The main system M1 and the additional system M2 are connected by an elastic member 2, the stiffness of the elastic member 2 is k2, and the radial displacement of the additional system M2 is X2. The radial displacement of the main system M1 and the radial displacement of the additional system M2 constitute a two-degree-of-freedom system, and the steady-state response amplitude of the system is:

[0041]

[0042] in

[0043]

[0044] Where:

[0045] X1: radial displacement of the straight pipe, a displacement of 0 means no vibration;

[0046] X2: radial displacement of mass 1;

[0047] k1: radial connection stiffness between the main system M1 and the elbow 6;

[0048] k2: stiffness of elastic member 2;

[0049] w: frequency;

[0050] F1: external excitation force on the main system M1;

[0051] So when , that is, the external excitation frequency is equal to the natural frequency of the vibration absorber. X1=0 in formula (1), which means that the displacement of the radial vibration of the straight pipe of the main system M1 is 0. The vibration of the straight pipe of the main system M1 is absorbed, and the exciting force on the main system M1 is just balanced by the elastic restoring force from the vibration absorber.

[0052] See also Figure 2 and 3 As shown, taking the longitudinal section of the mass block 1 as the projection plane, the thickness of the acoustic black hole structure 3 gradually decreases along the vibration propagation direction, and the thickness of the acoustic black hole structure 3 decreases in a power exponential form.

[0053] In this embodiment, the acoustic black hole is a new type of wave manipulation technology. By changing the thickness of the structure to achieve the change of the structural impedance, and then changing the bending wave velocity in the structure to achieve efficient aggregation of vibration energy, effectively improve the dissipation and transfer efficiency of vibration energy, and provide a new idea for structural vibration noise control. Since the acoustic black hole structure 3 has a broadband characteristic, and due to the acoustic black hole effect, the vibration wave can gradually decrease to approach zero when the vibration wave propagates in the minimum thickness of the acoustic black hole structure 3, that is, the part where the sound wave propagates in the thickness close to zero. The acoustic black hole structure 3 can dissipate elastic waves above the cutoff frequency, expand the frequency range of vibration reduction and noise reduction, and improve the vibration reduction and noise reduction effect.

[0054] See also Figures 2 to 4 As shown, taking the longitudinal section of the mass block 1 as the projection plane, the acoustic black hole structure 3 has a first end 31 and a second end 32, the thickness of the first end 31 is greater than the thickness of the second end 32, and the vibration propagates from the first end 31 to the second end 32, the mass block 1 also includes a damping ring 4, and the inner wall of the first end 31 or the inner wall of the second end 32 is provided with a damping ring 4.

[0055] Specifically, when sound waves propagate in the acoustic black hole structure 3, as the thickness of the acoustic black hole structure 3 gradually becomes thinner, its sound velocity will gradually decrease. When the thickness of the acoustic black hole structure 3 is reduced to 0 mm, the sound velocity will also reach 0, achieving sound wave absorption in a broad sense. However, due to process limitations, the thickness h ≥ 0.1 mm is generally required, and the thickness of the acoustic black hole structure 3 cannot reach 0 mm. Therefore, the sound wave vibration will gather at the second end 32 of the acoustic black hole structure 3. Adding a damping ring 4 here can effectively absorb the energy of the dissipated wave. In this embodiment, combined with the vibration absorption requirements of this embodiment, the damping material that plays a damping role is set in a ring shape, which is based on the setting of the vibrating member 5 as a pipe fitting. In other embodiments, the damping ring 4 can also be set as a plate structure or a block structure according to the structure of the vibrating member 5.

[0056] See also Figure 5 As shown, the acoustic black hole structure 3 includes a uniform portion 301 and a variable cross-section portion 302 that are connected to each other. The uniform portion 301 is sleeved on the outer wall of the elastic member 2. One end of the variable cross-section portion 302 is connected to the axial outer edge of the uniform portion 301, and the other end of the variable cross-section portion 302 extends toward the second end 32, and the damping ring 4 is arranged on this end; the variable cross-section of the variable cross-section portion 302 faces the elastic member 2, and a gathering cavity is formed between the variable cross-section of the variable cross-section portion 302 and the elastic member 2.

[0057] Specifically, the uniform portion 301 in this embodiment refers to the part of the acoustic black hole whose thickness is uniform and there is no change in thickness, while the thickness of the variable cross-section portion 302 is gradually reduced due to the existence of the variable cross-section. The vibration propagation direction is from bottom to top, and the second end 32 is above the first end 31. In this embodiment, the structure of the mass block 1 is set to the acoustic black hole structure 3. After the first vibration absorption of the radial vibration of the vibrating member 5 by the mass block 1, the radial vibration wave of the vibrating member 5 will also be transmitted to the acoustic black hole structure 3, and the acoustic black hole structure 3 can also be displaced. The thickness of the acoustic black hole structure 3 decreases exponentially. When the sound wave propagates from the uniform portion 301 to the variable cross-section portion 302 with a smaller thickness, the phase velocity of the wave propagation gradually decreases, and thus gathers to the variable cross-section portion 302 with a smaller thickness. The closer the variable cross-section portion 302 is to the second end 32, the thinner the thickness is. In view of this characteristic, a damping ring 4 is provided at the position where the thickness of the structure is the thinnest, and the damping ring 4 will dissipate the vibration.

[0058] In this embodiment, the uniform portion 301 is connected to the elastic member 2, and the variable cross-section portion 302 is connected to the axial outer edge of the uniform portion 301, which is arranged according to the vibration propagation direction, so that the sound waves can gather at the thinnest part of the variable cross-section portion 302, and the damping ring 4 is arranged here to absorb vibration to the maximum extent, and can effectively absorb the energy of the dissipated wave. In this embodiment, since the mass block 1 includes the acoustic black hole structure 3, it can absorb the radial vibration for the second time, which is equivalent to replacing the conventional mass block 1 with the acoustic black hole structure 3 in this embodiment. Since the acoustic black hole structure 3 itself has a certain mass, it can play the role of the mass block 1, and combined with the characteristics of the acoustic black hole structure 3, it can absorb the vibration that the vibration absorber provided with the conventional mass block 1 cannot absorb or absorbs incompletely, that is, the acoustic black hole structure 3 can absorb vibrations in other frequency ranges, and perform secondary vibration absorption, which greatly broadens the vibration absorption frequency range of the vibration absorber.

[0059] It is worth noting that, in conjunction with Figure 8 As shown, the vibrating member 5 in this embodiment is a straight tube in the liquid dispenser. Since the straight tube is connected to the curved tube 6, the straight tube has a problem of large vibration. The straight tube is the main system M1, and the mass block 1 is the additional system M2. The radial movement of the straight tube and the radial movement of the mass block 1 constitute a two-degree-of-freedom system. Due to the characteristics of the vibration absorber, the vibration absorption frequency bandwidth is small, and the vibration suppression ability outside the resonance frequency is weak. The mass block 1 of this embodiment includes an acoustic black hole structure 3, that is, the mass block 1 is replaced by the acoustic black hole structure 3. The process and principle of the acoustic black hole structure 3 in the second vibration absorption process are as follows:

[0060] The governing equation for the propagation of sound waves in a one-dimensional beam structure is (3)

[0061] (3)

[0062] Where: ρ—density; E—elastic modulus; I—moment of inertia, W—vibration velocity

[0063] From formula (3), we can get formula (4):

[0064] (4)

[0065] Where: h is the thickness of the beam, v is the Poisson's ratio, w is the circular frequency, x is the distance between the wave propagation position and the starting point of the variable cross-section portion 302, and t is the wave propagation time;

[0066] When the sound wave propagates in the acoustic black hole structure 3, as the thickness of the beam h gradually becomes thinner, that is, as the thickness of the variable cross-section portion 302 gradually becomes thinner, its sound velocity c will gradually decrease. When the thickness of the variable cross-section portion 302 is reduced to 0 mm, the sound velocity will also reach 0, achieving sound wave absorption in a broad sense. However, the thickness of the variable cross-section portion 302 cannot reach 0 mm, so the sound wave vibration will gather at the tail of the acoustic black hole, that is, at the position of the variable cross-section portion 302 close to the second end 32. Adding a damping ring 4 here can effectively absorb the energy of the dissipated wave. The acoustic black hole structure 3 of this embodiment mainly utilizes the sound wave gathering function of the acoustic black hole and the damping ring 4 to achieve the vibration absorption effect.

[0067] See also Figure 6 As shown, a plurality of separation grooves 321 are provided on the variable cross-section portion 302, and the plurality of separation grooves 321 are arranged at intervals, a first end of the separation groove 321 is at the connection between the variable cross-section portion 302 and the uniform portion 301, and a second end of the separation groove 321 is at the second end portion 32, so that the variable cross-section portion 302 is divided into a plurality of sub-variable cross-section portions 322.

[0068] In this embodiment, a plurality of separation grooves 321 are provided on the variable cross-section portion 302, and the separation grooves 321 are not provided on the uniform portion 301. If the separation grooves 321 are not provided, the variable cross-section portion 302 is an integral annular structure. When the separation grooves 321 are provided, it is equivalent to the variable cross-section portion 302 being divided into a plurality of sub-variable cross-section portions 322, and the plurality of variable cross-section portions 302 are coupled with each other. The provision of separation grooves 321 on the acoustic black hole structure 3 can be regarded as the parallel connection of a plurality of acoustic black hole structures 3. The vibration suppression effect of the acoustic black hole structure 3 on the vibrating member 5 after the grooves are provided is actually produced by the joint action of a plurality of acoustic black hole structures 3. Moreover, after the provision of the separation grooves 321, within the same frequency range, the acoustic black hole structure 3 increases the number of modes, increases the coupling probability with the main system M1, and can produce a better suppression effect.

[0069] See also Figure 6 As shown, taking the longitudinal section of the mass block 1 as the projection plane, an angle is formed between a line connecting the first end of the separation groove 321 to the second end of the separation groove 321 and a horizontal line in the horizontal direction, and the angle ranges from 30° to 90°.

[0070] In this embodiment, the angle can be any angle in the range of 30° to 90°, and the angles of each separation groove 321 can be the same or different. In this way, within the same frequency range, the acoustic black hole structure 3 increases the number of modes and the coupling probability with the main system M1, which can produce a better suppression effect.

[0071] See also Figure 7As shown, as a second embodiment of the acoustic black hole structure 3, the acoustic black hole structure 3 includes a uniform portion 301 and a variable cross-section portion 302 that are connected to each other, the uniform portion 301 is connected to the outer wall of the elastic member 2, one end of the variable cross-section portion 302 is connected to the radial outer edge of the uniform portion 301, and the other end of the variable cross-section portion 302 extends outward in the radial direction of the elastic member 2, and the damping ring 4 is arranged on this end.

[0072] Specifically, the structure of the uniform portion 301 in this embodiment is the same as that in the first embodiment, and the uniform portion 301 is connected to the elastic member 2. The difference is that the connection direction of the variable cross-section portion 302 and the uniform portion 301 in this embodiment is different. The uniform portion 301 is clamped on the elastic member 2. The variable cross-section portion 302 in the first embodiment is connected to the axial outer edge of the uniform portion 301, that is, the length extension direction of the variable cross-section portion 302 is parallel to the axial direction of the elastic member 2. The variable cross-section portion 302 in the second embodiment is connected to the radial outer edge of the uniform portion 301, that is, the length extension direction of the variable cross-section portion 302 extends in the horizontal direction away from the elastic member 2, and the length extension direction of the variable cross-section portion 302 is perpendicular to the axial direction of the elastic member 2. In this embodiment, according to the vibration transmission direction of the vibrating member 5, the preferred embodiment is the first embodiment, but the structural forms of the acoustic black hole structure 3 are various, and the second embodiment is a structural deformation of the first embodiment, which also plays the role of secondary vibration absorption.

[0073] It is worth noting that in this embodiment, it is limited to setting the separation groove 321 on the variable cross-section portion 302. In other embodiments, the separation groove 321 can be partially opened on the uniform portion 301 or partially opened on the variable cross-section portion 302, and the shape, number and angle of the separation groove 321 can be flexibly adjusted according to the vibration absorption requirements. In addition, in this embodiment, it is described that the variable cross-section portion 302 is only set in the radial and axial directions of the uniform portion 301. In other embodiments, the variable cross-section portion 302 can be set in other directions of the uniform portion 301.

[0074] See also Figure 2 As shown, the acoustic black hole structure 3 is ring-shaped and has a notch 303 . The notch 303 breaks the acoustic black hole structure 3 , so that the acoustic black hole structure 3 has a first section 331 and a second section 332 that are separated from each other.

[0075] In this embodiment, the acoustic black hole structure 3 is ring-shaped, and the elastic member 2 is sleeved or clamped on the vibration member 5. The acoustic black hole structure 3 of this embodiment is provided with a notch 303, and the notch 303 disconnects the entire acoustic black hole structure 3. The notch 303 is provided to facilitate the installation of the vibration absorber on the vibration members 5 with different pipe diameters, thereby improving the versatility of the vibration absorber.

[0076] See also Figure 2As shown, the acoustic black hole structure 3 is snap-fitted with the elastic member 2 , and the acoustic black hole structure 3 and the elastic member 2 are interference fit.

[0077] In this embodiment, the presence of the notch 303 enables the acoustic black hole structure 3 to be snapped onto the elastic member 2, and the acoustic black hole structure 3 and the elastic member 2 are interference fit, and the acoustic black hole structure 3 will not loosen from the elastic member 2. In order to further prevent the acoustic black hole structure 3 and the elastic member 2 from loosening, glue can be applied between the acoustic black hole structure 3 and the elastic member 2, or the two can be connected with bolts.

[0078] As a specific implementation manner, when the acoustic black hole structure 3 includes a uniform portion 301 and a variable cross-section portion 302 that are interconnected, the uniform portion 301 is connected to the outer wall of the elastic member 2, one end of the variable cross-section portion 302 is connected to the axial outer edge of the uniform portion 301, the other end of the variable cross-section portion 302 extends toward the second end 32, and the damping ring 4 is arranged on this end, the notch 303 penetrates the uniform portion 301, the variable cross-section portion 302 and the damping ring 4 in the axial direction, that is, when the acoustic black hole structure 3 is installed, the damping ring 4 and the variable cross-section portion 302 do not affect the acoustic black hole structure 3 being clamped on the elastic member 2.

[0079] See also Figure 1 As shown, a compressor includes a vibration absorber and a liquid separator. The vibration absorber is the above-mentioned vibration absorber. A pipe is vertically arranged in the liquid separator, and the pipe is a vibration member 5.

[0080] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0081] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention. The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention, and these improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A compressor, characterized in that: Including vibration absorber and dispenser: The vibration absorber comprises a mass block (1) and an elastic member (2); the elastic member (2) and the mass block (1) are coaxially arranged with a vibration member (5); in the radial direction of the vibration member (5), the vibration member (5), the elastic member (2) and the mass block (1) are sequentially connected from the inside to the outside; the mass block (1) is used for first absorbing the radial vibration of the vibration member (5); the mass block (1) comprises an acoustic black hole structure (3); the acoustic black hole structure (3) is connected to the outer wall of the elastic member (2); the acoustic black hole structure (3) is used for second absorbing the radial vibration of the vibration member (5); The liquid distributor comprises a pipe and a curved pipe (6), wherein the pipe is vertically arranged in the liquid distributor, the pipe being the vibrating member (5), one end of the curved pipe (6) being connected to the bottom end of the pipe, and the other end of the curved pipe (6) extending out of the liquid distributor; The pipe is elastically connected to the mass block (1) via the elastic member (2); the pipe is a main system and the mass block (1) is an additional system; the radial movement of the pipe and the radial movement of the mass block (1) constitute a two-degree-of-freedom system, so that the external excitation force applied to the pipe is balanced by the elastic restoring force of the vibration absorber.

2. The compressor according to claim 1, characterized in that Taking the longitudinal section of the mass block (1) as a projection plane, the thickness of the acoustic black hole structure (3) gradually decreases along the vibration propagation direction, and the thickness of the acoustic black hole structure (3) decreases in a power exponential form.

3. The compressor according to claim 1, characterized in that Taking the longitudinal section of the mass block (1) as a projection plane, the acoustic black hole structure (3) comprises a first end (31) and a second end (32), the thickness of the first end (31) is greater than the thickness of the second end (32), and vibration propagates from the first end (31) to the second end (32); the mass block (1) further comprises a damping ring (4), and the damping ring (4) is provided on the inner wall of the first end (31) or the inner wall of the second end (32).

4. The compressor according to claim 3, characterized in that The acoustic black hole structure (3) comprises a uniform portion (301) and a variable cross-section portion (302); the uniform portion (301) is sleeved on the outer wall of the elastic member (2); one end of the variable cross-section portion (302) is connected to the axial outer edge of the uniform portion (301); the other end of the variable cross-section portion (302) extends toward the second end portion (32); and the thickness of the variable cross-section portion (302) gradually decreases; the damping ring (4) is arranged on the other end of the variable cross-section portion (302); the variable cross-section of the variable cross-section portion (302) faces the elastic member (2); and a gathering cavity is formed between the variable cross-section of the variable cross-section portion (302) and the elastic member (2).

5. The compressor according to claim 4, characterized in that A plurality of separation grooves (321) are provided on the variable cross-section portion (302), the plurality of separation grooves (321) being arranged at intervals, a first end of the separation groove (321) being located at the connection between the variable cross-section portion (302) and the uniform portion (301), and a second end of the separation groove (321) extending toward the second end portion (32), so that the variable cross-section portion (302) is divided into a plurality of sub-variable cross-section portions (322).

6. The compressor according to claim 5, characterized in that Taking the longitudinal section of the mass block (1) as a projection plane, an angle is formed between a line connecting the first end of the separation groove (321) to the second end of the separation groove (321) and a horizontal line in the horizontal direction, and the range of the angle is 30° to 90°.

7. The compressor according to claim 3, characterized in that The acoustic black hole structure (3) comprises a uniform portion (301) and a variable cross-section portion (302) which are connected to each other, the uniform portion (301) being sleeved on the outer wall of the elastic member (2), one end of the variable cross-section portion (302) being connected to the radial outer edge of the uniform portion (301), the other end of the variable cross-section portion (302) extending outwardly in the radial direction of the elastic member (2), and the damping ring (4) being arranged on the other end of the variable cross-section portion (302).

8. The compressor according to claim 1, characterized in that The acoustic black hole structure (3) is ring-shaped and has a notch (303), wherein the notch (303) disconnects the acoustic black hole structure (3), so that the acoustic black hole structure (3) has a first section (331) and a second section (332) that are separated from each other.

9. The compressor according to claim 8, characterized in that The acoustic black hole structure (3) is snap-fitted with the elastic member (2), and the acoustic black hole structure (3) and the elastic member (2) are interference-fitted.

Images