Air damping vibration isolator

Abstract

The present invention relates to the technical field of vibration isolators, and in particular, to an air damping vibration isolator. It comprises a shell unit, a first damping unit, a piston unit, and an exhaust unit. The Tesla valve channel of the first damping unit is arranged on the shell unit. The first end of the Tesla valve channel is connected to the inner cavity of the shell unit, and the second end is connected to the outside of the shell unit. The piston unit is movably inserted in the shell unit. A accommodating chamber is formed between the piston unit and the shell unit. The accommodating chamber is connected to the first end. The first surface of the shell unit and the second surface of the piston unit can slide relative to each other. One end of the first exhaust part is connected to the Tesla valve channel, and the other end passes through the first surface. One end of the second exhaust part passes through the second surface, and the other end passes through the outside of the shell unit. When the shell unit and the piston unit slide relative to each other, the first exhaust part is connected to or staggered with the second exhaust part. In this way, the problem of short service life of the vibration isolator is solved.

Description

Technical Field

[0001] The invention relates to the technical field of vibration isolators, and in particular to an air damping vibration isolator. Background Art

[0002] At present, vibration isolators are mainly used in aerospace, vehicles, precision instruments and other industries. Vibration isolators are mainly used to establish isolation between various vibration sources and working parts (such as electrical control parts), reduce the vibration value transmitted to the working parts, and provide damping to dissipate vibration energy. Vibration isolators are an effective means to prevent working parts from being damaged or performance degraded under vibration and impact environments.

[0003] Commonly used vibration isolators include rubber vibration isolators, metal rubber vibration isolators, metal friction plate vibration isolators, metal wire mesh vibration isolators, etc. The above vibration isolators have the following main disadvantages: the vibration isolation effect depends on the damping effect or mutual friction of the vibration isolation material, the service life is short, and the vibration isolation effect tends to decrease with the increase of use time; the weight is heavy, which adds additional system load; the vibration isolator itself still has resonance points in certain frequency bands, and cannot play a good vibration isolation effect under random loads in the full frequency band of 0 to 2000Hz; the effect is poor under instantaneous large overload impact. Summary of the invention

[0004] In order to solve the problem of short service life of the vibration isolator, the present invention provides an air damping vibration isolator, comprising:

[0005] Housing unit,

[0006] a first damping unit, the first damping unit comprising a Tesla valve channel; the Tesla valve channel is arranged on the housing unit; one end of the Tesla valve channel is a first end, and the other end is a second end; the first end is communicated with the inner cavity of the housing unit; the second end is communicated with the outside of the housing unit; the resistance of air flowing from the first end toward the second end is greater than the resistance of air flowing from the second end toward the first end;

[0007] A piston unit, the piston unit is movably inserted in the housing unit; a receiving chamber is formed between the piston unit and the housing unit; the receiving chamber is communicated with the first end;

[0008] An exhaust unit, the exhaust unit comprising a first exhaust portion and a second exhaust portion; the first exhaust portion is arranged on the shell unit; the second exhaust portion is arranged on the piston unit; the inner cavity of the shell unit has a first surface; the piston unit has a second surface; the first surface and the second surface can slide relative to each other; one end of the first exhaust portion is connected to the Tesla valve channel, and the other end passes through the first surface; one end of the second exhaust portion passes through the second surface, and the other end passes through the outside of the shell unit; when the shell unit and the piston unit are in a state of relative sliding, the first exhaust portion and the second exhaust portion are connected or staggered.

[0009] In some embodiments, a plurality of the first exhaust parts are provided; a plurality of the second exhaust parts are provided; the plurality of the first exhaust parts are arranged in sequence along the axial direction of the piston unit; the plurality of the second exhaust parts are arranged in sequence along the axial direction of the piston unit; the arrangement interval of the first exhaust parts is equal to the arrangement interval of the second exhaust parts; the plurality of the second exhaust parts are connected in sequence; one end of the piston unit passing through the outer shell unit is a connecting end; the second exhaust part close to the connecting end is connected to the outside of the outer shell unit.

[0010] In some embodiments, the first surface and the second surface are slidably fitted together; and the second exhaust portion is a Tesla valve structure.

[0011] In some embodiments, one end of the second exhaust portion that passes through the second surface is the third end; one end of the second exhaust portion that passes through the outside of the accommodating cavity is the fourth end; and the resistance of air flowing along the third end toward the fourth end is less than the resistance of air flowing along the fourth end toward the third end.

[0012] In some embodiments, the first surface and the second surface are slidably fitted together; the second exhaust portion is recessed in a direction away from the first surface to form an exhaust groove; the exhaust groove is provided on the second surface; the length direction of the exhaust groove extends along the circumferential direction of the piston unit; the exhaust unit further comprises a plurality of connecting grooves; the connecting grooves and the exhaust grooves are alternately arranged along the axial direction of the piston unit; two adjacent exhaust grooves arranged along the axial direction of the piston unit are connected via the connecting groove; the projections of the connecting grooves on two adjacent exhaust grooves along the axial direction of the piston unit are staggered.

[0013] In some embodiments, the second exhaust portion is an exhaust channel; the piston unit includes a piston body and a sealing ring; the piston body is movably inserted in the outer shell unit; the second surface is the circumferential surface of the piston body; the sealing ring is sleeved on the second surface of the piston body; the sealing ring is detachably connected to the piston body; there is a notch on the sealing ring; there are multiple sealing rings distributed along the axial direction of the piston body; the exhaust channel is formed between adjacent sealing rings; adjacent exhaust channels are connected through the notch; the notches on adjacent sealing rings are misaligned along the axial projection of the piston body; the exhaust channel near the connecting end is connected to the outside of the outer shell unit; the sealing ring is slidably fitted with the first surface; there is a gap between the first surface and the second surface; the exhaust channel is located in the gap between the first surface and the second surface.

[0014] In some embodiments, the air damping isolator also includes a second damping unit; the second damping unit includes a first magnet and a second magnet; the first magnet is detachably connected to the piston unit; the second magnet is detachably connected to the shell unit; the first magnet and the second magnet are spaced apart along the direction of relative sliding between the shell unit and the piston unit; the first magnet and the second magnet repel each other.

[0015] In some embodiments, the air damping isolator also includes a second damping unit; the second damping unit includes a spring; one end of the spring is detachably connected to the piston unit, and the other end is detachably connected to the shell unit; the axis of the spring is parallel to the axis of the piston unit.

[0016] In some embodiments, a recess is formed at one end of the housing unit away from the piston unit; the recess is located on the outside of the housing unit.

[0017] In some embodiments, the air damping isolator also includes a limiting unit; the limiting unit includes a first limiting portion and a second limiting portion; the first limiting portion is arranged on the second surface; the second limiting portion is arranged on the first surface; the first limiting portion and the second limiting portion are connected in an axial sliding manner along the piston unit.

[0018] In order to solve the problem of short service life of the vibration isolator, the present invention has the following advantages:

[0019] Air damping shock absorption is achieved through the Tesla valve structure, without friction between structures and without reliance on damping materials. This enables the air damping isolator to ensure a good damping effect and irregular damping changes, which can adapt to shock absorption in a wide frequency range. The on-off change of the exhaust unit can change the flow resistance of the air in the Tesla valve channel, further disrupting the inherent movement mode of the air damping isolator, thereby making the air damping isolator have a better shock absorption effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A partial schematic diagram of an air damping vibration isolator of a first embodiment is shown;

[0021] Figure 2 A partial schematic diagram of an air damping vibration isolator of a second embodiment is shown;

[0022] Figure 3 A partial schematic diagram of an air damping vibration isolator of a third embodiment is shown;

[0023] Figure 4 A partial schematic diagram of an air damping vibration isolator of a fourth embodiment is shown;

[0024] Figure 5 A partial schematic diagram of an air damping vibration isolator of a fifth embodiment is shown;

[0025] Figure 6 A partial schematic diagram of an air damping vibration isolator of a sixth embodiment is shown;

[0026] Figure 7 A schematic diagram of an air damping vibration isolator of a first embodiment is shown;

[0027] Figure 8 A schematic diagram of an air damping vibration isolator of a second embodiment is shown;

[0028] Fig. 9 A schematic diagram of an air damping vibration isolator of a third embodiment is shown;

[0029] Fig.10 A schematic diagram of an air damping vibration isolator of a fourth embodiment is shown;

[0030] Fig.11 A schematic diagram of a sealing ring according to an embodiment is shown.

[0031] Figure numerals: 10 shell unit; 11 shell; 12 recessed portion; 20 first damping unit; 21 first end; 22 second end; 30 piston unit; 31 piston body; 32 sealing ring; 40 exhaust unit; 41 first exhaust portion; 42 second exhaust portion; 50 second damping unit; 51 first magnetic steel; 52 second magnetic steel; 60 limiting unit; 61 first limiting portion; 62 second limiting portion. DETAILED DESCRIPTION

[0032] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, rather than implying any limitation on the scope of the present disclosure.

[0033] As used herein, the term "including" and its variants are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "based at least in part on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like is based on the orientation or position relationship shown in the accompanying drawings. These terms are mainly for better describing the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, in addition to being used to indicate an orientation or position relationship, some of the above terms may also be used to indicate other meanings, such as the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances. In addition, the terms "install", "set", "provided with", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0034] In this embodiment, most of the existing vibration isolators use damping materials or friction relative motion to achieve the vibration isolation effect. As the use time increases, the vibration isolation effect tends to decline due to the influence of the material life. In addition, the vibration isolator itself still has resonance points in certain frequency bands, and cannot achieve a good vibration isolation effect under random working conditions in the full frequency band. For this reason, this embodiment discloses an air damping vibration isolator. Figure 7As shown, the air damping isolator may include a housing unit 10 , a first damping unit 20 , a piston unit 30 , and an exhaust unit 40 .

[0035] like Figure 1 , Figure 2 , Figure 3 As shown, the housing unit 10 as a whole can be a cylindrical structure with one end open and the other end closed. The closed end of the housing unit 10 can be provided with a thread or a flange seat so as to be detachably connected with an external component. Alternatively, a plurality of grooves extending along the axial direction of the housing unit 10 can be provided at intervals in the circumferential direction of the outer wall of the housing unit 10 to reduce the weight of the air damping vibration isolator, and can be interference-fitted with the external component during installation.

[0036] like Figure 7As shown, the first damping unit 20 includes a Tesla valve channel. The Tesla valve channel is arranged on the housing unit 10. The Tesla valve channel can be an externally attached pipeline or a pipeline directly opened in the housing unit 10. One end of the Tesla valve channel is the first end 21, and the other end is the second end 22. The first end 21 is connected to the inner cavity of the housing unit 10. The second end 22 is connected to the outside of the housing unit 10. There can be multiple connecting ports between the first end 21 and the second end 22 to ensure that the air path is unobstructed and avoid blockage. The resistance of air flowing from the first end 21 toward the second end 22 is greater than the resistance of air flowing from the second end 22 toward the first end 21. The piston unit 30 is movably inserted in the housing unit 10. A accommodating chamber is formed between the piston unit 30 and the housing unit 10. The accommodating chamber is connected to the first end 21. Through the above arrangement, the vibration energy consumption mode is changed from material damping and mutual friction consumption to air damping consumption. The vibration isolator using air damping is lighter than the traditional vibration isolator and the life of the vibration isolator is increased. When the air damping vibration isolator is subjected to external vibration in the axial direction, the piston unit 30 and the shell unit 10 can slide relative to each other. When the piston unit 30 and the shell unit 10 move toward each other, the resistance of the air in the accommodating chamber to the outside of the shell unit 10 through the Tesla valve channel is large, and the greater the speed of the movement toward each other, the greater the resistance. At this time, the vibration energy (mechanical energy) and the gravitational potential energy of the working part can be continuously converted into the internal energy and molecular potential energy of the air through the air damping vibration isolator, and the vibration value will decay, thereby achieving a good vibration reduction effect. When the piston unit 30 and the shell unit 10 move away from each other, the resistance of the air outside the shell unit 10 to flow toward the accommodating chamber through the Tesla valve channel is small. At this time, the vibration energy (mechanical energy) and the air molecular potential energy can be continuously converted into the internal energy of the air and the gravitational potential energy of the working part through the air damping vibration isolator. The attenuation amplitude of the vibration value is not as good as when moving toward each other, but it can still achieve a certain vibration reduction effect. While ensuring that the accommodating chamber is connected to the external atmosphere, the Tesla valve channel also avoids direct collision between the piston unit 30 and the housing unit 10 during vibration isolation, thereby protecting the air damping isolator structure while isolating vibration.

[0037] like Figure 7As shown, the exhaust unit 40 may include a first exhaust portion 41 and a second exhaust portion 42. The first exhaust portion 41 is arranged on the housing unit 10. The second exhaust portion 42 is arranged on the piston unit 30, and its structure may be in the form of a Tesla valve structure, an exhaust groove, a channel, etc. The inner cavity of the housing unit 10 has a first surface. The piston unit 30 has a second surface. The first surface and the second surface can slide relative to each other. One end of the first exhaust portion 41 is connected to the Tesla valve channel, and the other end is connected to the first surface. One end of the second exhaust portion 42 is connected to the second surface, and the other end is connected to the outside of the housing unit 10. When the housing unit 10 and the piston unit 30 slide relative to each other, the first exhaust portion 41 and the second exhaust portion 42 are connected or staggered. Therefore, the air flow resistance in the Tesla valve channel can be disturbed by the opening and closing of the first exhaust portion 41 and the second exhaust portion 42, thereby making the damping change of the air damping vibration isolator irregular, which can adapt to the vibration reduction working conditions in a wide frequency range and improve the vibration isolation effect of the air damping vibration isolator.

[0038] In this embodiment, if Figure 7 As shown, a plurality of first exhaust parts 41 are provided. A plurality of second exhaust parts 42 are provided. The plurality of first exhaust parts 41 are arranged in sequence along the axial direction of the piston unit 30. The plurality of second exhaust parts 42 are arranged in sequence along the axial direction of the piston unit 30. The arrangement interval of the first exhaust parts 41 is equal to the arrangement interval of the second exhaust parts 42. The plurality of second exhaust parts 42 are connected in sequence. One end of the piston unit 30 that passes through the housing unit 10 is the connection end. The second exhaust part 42 near the connection end is connected to the outside of the housing unit 10. Since the vibration transmitted to the air damping vibration isolator is not an absolute regular change, but will change with the change of environmental conditions, the plurality of first exhaust parts 41 and the second exhaust part 42 can make the damping change of the air damping vibration isolator more irregular, thereby disrupting the inherent motion mode of the air damping vibration isolator, further improving the vibration isolation capability of the air damping vibration isolator in a wide frequency range, so that the air damping vibration isolator has a good vibration isolation effect under random loads in the full frequency band.

[0039] In this embodiment, if Figure 7 As shown, the first surface and the second surface can be slidably fitted; the second exhaust part 42 is a Tesla valve structure. The second exhaust part 42 adopts a Tesla valve structure. When the first exhaust part 41 and the second exhaust part 42 are switched on and off, the air flow resistance in the Tesla valve channel can change more significantly, which has the effect of disrupting the inherent motion mode of the air damping vibration isolator, so that the motion between the piston unit 30 and the shell unit 10 is no longer a simple periodic reciprocating motion. The air damping vibration isolator can further achieve a good vibration isolation effect under random loads in the full frequency band.

[0040] In this embodiment, if Figure 7As shown, the end of the second exhaust portion 42 that passes through the second surface is the third end; the end of the second exhaust portion 42 that passes through the outside of the accommodating cavity is the fourth end; the resistance of air flowing from the third end to the fourth end is less than the resistance of air flowing from the fourth end to the third end. The change direction of air resistance between the Tesla valve structure in the second exhaust portion 42 and the Tesla valve channel on the housing unit 10 is opposite, thereby further improving the effect of disrupting the inherent motion mode of the air damping vibration isolator, thereby improving the vibration isolation capability of the air damping vibration isolator in a wide frequency range.

[0041] In this embodiment, if Figure 8 As shown, the first surface and the second surface are slidably fitted. Figure 5 As shown, the second exhaust portion 42 can be recessed in a direction away from the first surface to form an exhaust groove. The exhaust groove is provided on the second surface. The length direction of the exhaust groove extends along the circumferential direction of the piston unit 30. The exhaust unit 40 also includes a plurality of connecting grooves. The connecting grooves and the exhaust grooves are alternately arranged along the axial direction of the piston unit 30. Two adjacent exhaust grooves arranged along the axial direction of the piston unit 30 are connected through the connecting grooves. The connecting grooves on the two adjacent exhaust grooves are misaligned along the axial projection of the piston unit 30. The second exhaust portion 42 and the connecting groove arranged along the axial direction of the piston unit 30 can be a group, and multiple groups can be distributed along the circumferential direction of the piston unit 30. When the first exhaust portion 41 and the second exhaust portion 42 are switched on and off, part of the air will flow through the exhaust groove and be discharged to the outside, which can make the air flow resistance in the Tesla valve channel change more significantly, play the effect of disturbing the inherent motion mode of the air damping vibration isolator, and make the motion between the piston unit 30 and the housing unit 10 no longer a simple periodic reciprocating motion. The vibration isolation capability of the air damping vibration isolator in a wide frequency range can be further improved.

[0042] In other embodiments, two adjacent exhaust grooves along the axial direction of the piston unit 30 may also be connected via a Tesla valve structure.

[0043] In this embodiment, if Figure 6 , Fig. 9 As shown, the second exhaust portion 42 can be an exhaust channel; the piston unit 30 includes a piston body 31 and a sealing ring 32; the piston body 31 is movably inserted in the housing unit 10; the second surface is the circumferential surface of the piston body 31; the sealing ring 32 is sleeved on the second surface of the piston body 31; the sealing ring 32 is detachably connected to the piston body 31; as shown in FIG. Fig.11As shown, there is a notch on the sealing ring 32; there are multiple sealing rings 32 distributed along the axial direction of the piston body 31; an exhaust channel is formed between adjacent sealing rings 32; adjacent exhaust channels are connected through notches; the notches on adjacent sealing rings 32 are misaligned along the axial projection of the piston body 31; the exhaust channel near the connection end is connected to the outside of the housing unit 10; the sealing ring 32 is slidably fitted with the first surface; there is a gap between the first surface and the second surface; the exhaust channel is located in the gap between the first surface and the second surface. When the sealing ring 32 blocks the first exhaust portion 41, the air in the Tesla valve channel can be discharged through the second end 22. When the sealing ring 32 is misaligned with the first exhaust portion 41 (that is, the first exhaust portion 41 is connected to the exhaust channel), the air in the Tesla valve channel can be discharged to the outside through the second end 22 or the exhaust channel, so that the air flow resistance in the Tesla valve channel changes more significantly, which has the effect of disturbing the inherent motion mode of the air damping vibration isolator, so that the motion between the piston unit 30 and the housing unit 10 is no longer a simple periodic reciprocating motion. The vibration isolation capability of the air damping vibration isolator in a wide frequency range can be further improved. The seal ring 32, which is a wearing part, is relatively easy to replace and has good maintainability.

[0044] In this embodiment, if Figure 7 , Figure 8 , Fig. 9 As shown, the air damping vibration isolator also includes a second damping unit 50; the second damping unit 50 includes a first magnetic steel 51 and a second magnetic steel 52; the first magnetic steel 51 is detachably connected to the piston unit 30; the second magnetic steel 52 is detachably connected to the shell unit 10; the first magnetic steel 51 and the second magnetic steel 52 are spaced apart along the direction of relative sliding between the shell unit 10 and the piston unit 30; the first magnetic steel 51 and the second magnetic steel 52 repel each other. The first magnetic steel 51 and the second magnetic steel 52 can be magnetic materials, and the magnetic potential energy provided by the second damping unit 50 can further consume vibration energy and can withstand greater vibration impact force, so as to cope with instantaneous large overload impact conditions and improve the vibration isolation effect of the air damping vibration isolator. Fig.10 As shown, a plurality of second damping units 50 may be arranged at intervals along the circumferential direction of the housing unit 10 so that the vibration isolation force is more uniform.

[0045] In this embodiment, the air damping vibration isolator further includes a second damping unit 50; the second damping unit 50 includes a spring; one end of the spring is detachably connected to the piston unit 30, and the other end is detachably connected to the housing unit 10; the axis of the spring is parallel to the axis of the piston unit 30. Thus, the vibration energy can be consumed by the elastic deformation of the spring, thereby improving the vibration isolation effect of the air damping vibration isolator.

[0046] In this embodiment, if Figure 7 , Figure 8 , Fig. 9As shown, the housing unit 10 may include a shell 11 and a recessed portion 12; the recessed portion 12 is formed at one end of the shell 11 away from the piston unit 30; and the recessed portion 12 is located outside the shell 11. While the recessed portion 12 plays a role in reducing weight, the force formed on the spherical surface is more uniform, so that the air damping vibration isolator maintains a larger supporting force.

[0047] In this embodiment, if Figure 4 , Fig.10 As shown, the air damping vibration isolator may further include a limiting unit 60; the limiting unit 60 may include a first limiting portion 61 and a second limiting portion 62; the first limiting portion 61 is arranged on the second surface, which may be a protrusion extending along the axial direction of the piston unit 30; the second limiting portion 62 is arranged on the first surface, which may be a groove extending along the axial direction of the shell unit 10; the first limiting portion 61 and the second limiting portion 62 are connected in an axial sliding manner with respect to the piston unit 30. Through the above arrangement, relative rotation between the shell unit 10 and the piston unit 30 during the relative sliding along the axial direction of the air damping vibration isolator can be avoided, resulting in the inability to communicate between the first exhaust portion 41 and the second exhaust portion 42. This ensures that the air damping vibration isolator can achieve a stable and good vibration isolation effect.

[0048] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present disclosure, and in actual applications, various changes may be made thereto in form and detail without departing from the scope of the present disclosure.

Claims

1. An air damping vibration isolator, characterized in that: The air damping isolator comprises: Housing unit, a first damping unit, the first damping unit comprising a Tesla valve channel; the Tesla valve channel is arranged on the housing unit; one end of the Tesla valve channel is a first end, and the other end is a second end; the first end is communicated with the inner cavity of the housing unit; the second end is communicated with the outside of the housing unit; the resistance of air flowing from the first end toward the second end is greater than the resistance of air flowing from the second end toward the first end; A piston unit, the piston unit is movably inserted in the housing unit; a receiving chamber is formed between the piston unit and the housing unit; the receiving chamber is communicated with the first end; An exhaust unit, the exhaust unit comprising a first exhaust portion and a second exhaust portion; the first exhaust portion is arranged on the shell unit; the second exhaust portion is arranged on the piston unit; the inner cavity of the shell unit has a first surface; the piston unit has a second surface; the first surface and the second surface can slide relative to each other; one end of the first exhaust portion is connected to the Tesla valve channel, and the other end is connected to the first surface; one end of the second exhaust portion is connected to the second surface, and the other end is connected to the outside of the shell unit; when the shell unit and the piston unit slide relative to each other, the first exhaust portion is connected to or staggered with the second exhaust portion; The air damping vibration isolator further includes a second damping unit; the second damping unit includes a first magnetic steel and a second magnetic steel; the first magnetic steel is detachably connected to the piston unit; the second magnetic steel is detachably connected to the shell unit; the first magnetic steel and the second magnetic steel are spaced apart along a direction in which the shell unit and the piston unit slide relative to each other; the first magnetic steel and the second magnetic steel repel each other; Alternatively, the second damping unit comprises a spring; one end of the spring is detachably connected to the piston unit, and the other end of the spring is detachably connected to the housing unit; the axis of the spring is parallel to the axis of the piston unit.

2. The air damping isolator according to claim 1, characterized in that: There are multiple first exhaust parts; there are multiple second exhaust parts; multiple first exhaust parts are arranged in sequence along the axial direction of the piston unit; multiple second exhaust parts are arranged in sequence along the axial direction of the piston unit; the arrangement interval of the first exhaust parts is equal to the arrangement interval of the second exhaust parts; multiple second exhaust parts are connected in sequence; one end of the piston unit passing through the outer shell unit is the connecting end; the second exhaust part close to the connecting end is connected to the outside of the outer shell unit.

3. The air damping isolator according to claim 2, characterized in that: The first surface and the second surface are slidably fitted together; the second exhaust portion is a Tesla valve structure.

4. The air damping vibration isolator according to claim 3, characterized in that: One end of the second exhaust portion that passes through the second surface is the third end; one end of the second exhaust portion that passes through the outside of the accommodating cavity is the fourth end; the resistance of air flowing along the third end toward the fourth end is less than the resistance of air flowing along the fourth end toward the third end.

5. The air damping isolator according to claim 2, characterized in that: The first surface and the second surface are slidably fitted together; the second exhaust portion is recessed in a direction away from the first surface to form an exhaust groove; the exhaust groove is provided on the second surface; the length direction of the exhaust groove extends along the circumferential direction of the piston unit; the exhaust unit further comprises a plurality of connecting grooves; the connecting grooves and the exhaust grooves are alternately arranged along the axial direction of the piston unit; two adjacent exhaust grooves arranged along the axial direction of the piston unit are connected via the connecting groove; the projections of the connecting grooves on two adjacent exhaust grooves along the axial direction of the piston unit are misaligned.

6. The air damping isolator according to claim 2, characterized in that: The second exhaust part is an exhaust channel; the piston unit includes a piston body and a sealing ring; the piston body is movably inserted in the outer shell unit; the second surface is the circumferential surface of the piston body; the sealing ring is sleeved on the second surface of the piston body; the sealing ring is detachably connected to the piston body; there is a notch on the sealing ring; there are multiple sealing rings distributed along the axial direction of the piston body; the exhaust channel is formed between adjacent sealing rings; adjacent exhaust channels are connected through the notch; the notches on adjacent sealing rings are misaligned along the axial projection of the piston body; the exhaust channel near the connecting end is connected to the outside of the outer shell unit; the sealing ring is slidably fitted with the first surface; there is a gap between the first surface and the second surface; the exhaust channel is located in the gap between the first surface and the second surface.

7. The air damping isolator according to claim 1, characterized in that: A recessed portion is formed at one end of the housing unit away from the piston unit; the recessed portion is located at the outer side of the housing unit.

8. The air damping isolator according to claim 1, characterized in that: The air damping vibration isolator also includes a limiting unit; the limiting unit includes a first limiting portion and a second limiting portion; the first limiting portion is arranged on the second surface; the second limiting portion is arranged on the first surface; the first limiting portion and the second limiting portion are connected in an axial sliding manner along the piston unit.

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