Vibration damping device and compressor

Abstract

The present invention provides a vibration damping device and a compressor. The vibration damping device includes: a vibration damping body, the vibration damping body having a vibration damping cavity and a mounting through hole arranged at intervals, and a magnetorheological fluid in the vibration damping cavity; a damper, the damper being elastically connected to the vibration damping body along the axial direction of the mounting through hole, a portion of the damper being passed through the vibration damping cavity, and the damper being matched with the axial limit of the rotating shaft; wherein the mounting through hole is used to accommodate a rotatable rotating shaft, and when the rotating shaft vibrates axially, the portion of the damper located in the vibration damping cavity stirs the magnetorheological fluid, and the magnetorheological fluid generates resistance to hinder the movement of the damper, thereby reducing vibration of the rotating shaft. The present invention effectively reduces vibration when the rotating shaft vibrates axially by cooperating with the vibration damping body and the damper, thereby increasing the service life of the rotating shaft and the compressor, reducing the vibration noise of the rotating shaft and the operating noise of the compressor, and keeping the overall noise of the compressor at a reasonable level when it is working.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a vibration damping device and a compressor. Background Art

[0002] At present, the existing compressors, especially the vertical high-pressure chamber scroll compressors, will intermittently exhaust during operation, causing the compressor to produce a fluctuating pressure difference, which in turn causes the rotating shaft of the motor in the scroll compressor to be subjected to fluctuating gas force. When the upward gas force exerted by the pressure difference on the rotating shaft is greater than the total weight of the rotating shaft shaft system (i.e., the rotating shaft and its surrounding matching components), the rotating shaft shaft system will move upward along the axial direction of the rotating shaft and hit the upper bracket in the scroll compressor. With the fluctuating pressure difference, the rotating shaft shaft system will fall back downward along the axial direction of the rotating shaft and hit the lower bracket after moving upward, thereby causing axial vibration. The axial vibration of the rotating shaft shaft system will not only reduce the service life and working reliability of the scroll compressor, but also generate a large amount of noise. For the rotating shafts in other devices with similar working scenarios, there is also the problem of prone to axial vibration, and there is no better solution in the prior art. Summary of the Invention

[0003] The present invention provides a vibration reduction device and a scroll compressor to solve the problem in the prior art that a rotating shaft is prone to axial vibration, thereby reducing the service life of the device and generating noise.

[0004] In order to solve the above problems, according to one aspect of the present invention, a vibration damping device is provided, which is used to reduce vibration of a rotating shaft. The vibration damping device includes: a vibration damping body, the vibration damping body having a vibration damping cavity and a mounting through hole arranged at intervals, and magnetorheological fluid is contained in the vibration damping cavity; a damper, the damper is elastically connected to the vibration damping body along the axial direction of the mounting through hole, a part of the damper is passed through the vibration damping cavity, and the damper is matched with the axial limit of the rotating shaft; wherein, the mounting through hole is used to accommodate a rotatable rotating shaft, and when the rotating shaft vibrates axially, the part of the damper located in the vibration damping cavity stirs the magnetorheological fluid, and the magnetorheological fluid generates resistance to hinder the movement of the damper, so as to reduce vibration of the rotating shaft.

[0005] Furthermore, the vibration damping device further includes a magnet portion, which is disposed in the vibration damping cavity and can generate a magnetic field to affect the resistance generated by the magnetorheological fluid.

[0006] Furthermore, the magnet part includes an iron core and a coil. The iron core is fixedly arranged in the vibration damping cavity, and the coil is wound around the iron core. By adjusting the current in the coil, the magnetic field strength is adjusted to adjust the resistance generated by the magnetorheological fluid.

[0007] Furthermore, the magnet part includes a permanent magnet, which is fixedly arranged in the vibration damping cavity. The permanent magnet generates a magnetic field to increase the resistance generated by the magnetorheological fluid.

[0008] Furthermore, the damper includes: a thrust plate, which is elastically connected to the vibration damping body along the axial direction of the mounting through hole and cooperates with the rotating shaft limiter; a damping plate, which is arranged on the thrust plate and moves along the axis of the mounting through hole with the thrust plate; the damping plate extends along the axis of the mounting through hole and passes through the vibration damping cavity; the part of the damping plate in the vibration damping cavity is in contact with the magnetorheological fluid, and the resistance acts on the damping plate.

[0009] Furthermore, the shape of the damping plate is adapted to the shape of the vibration damping cavity. The vibration damping device also includes an iron core and a coil. The iron core is fixedly arranged in the vibration damping cavity, and the coil is wound around the iron core to form an electromagnet. The direction of the magnetic flux lines of the magnetic field generated by the electromagnet is perpendicular to the surface of the damping plate, so that the resistance generated by the magnetorheological fluid is along the axis of the rotating shaft.

[0010] Furthermore, the iron core is in the shape of a triangular prism, and the damping plate is a V-shaped plate. The V-shaped plate has a first plate surface and a second plate surface. The first plate surface and the second plate surface have an angle. The first plate surface is arranged parallel to one side surface of the iron core, and the second plate surface is arranged parallel to the other side surface of the iron core. The resistance generated by the magnetorheological fluid acts on the first plate surface and the second plate surface respectively.

[0011] Furthermore, there are multiple vibration damping cavities, which are spaced apart along the circumference of the mounting through hole on the vibration damping body; there are multiple damping plates, which are spaced apart on the thrust plate, and the multiple damping plates are arranged in one-to-one correspondence with the multiple vibration damping cavities.

[0012] Furthermore, the vibration damping device further comprises an elastic member, which is respectively limitedly matched with the damper and the vibration damping body along the axial direction of the mounting through hole to achieve elastic connection between the damper and the vibration damping body.

[0013] Furthermore, the vibration damping device also includes a limiting member, which is fixedly connected to the damper, and the limiting member and the rotating shaft are limitedly matched in both axial directions.

[0014] Furthermore, the vibration damping device also includes: a sealing end cover, which is arranged on the vibration damping body and is used to shield the vibration damping cavity; the sealing end cover has a sealing hole and a through hole, the sealing hole is connected to the vibration damping cavity, and the through hole is connected to the mounting through hole; a sealing ring, which is arranged in the sealing hole; wherein a part of the damper passes through the sealing hole, and the sealing ring cooperates with the damper to close the sealing hole to prevent leakage of the magnetorheological fluid.

[0015] Furthermore, there are two sealing end covers, namely a first sealing end cover and a second sealing end cover. The vibration damping cavity passes through both ends of the vibration damping body along the axis of the rotating shaft. The first sealing end cover and the second sealing end cover are respectively arranged at both ends of the vibration damping body, and cooperate with multiple sealing rings to seal the vibration damping cavity.

[0016] Furthermore, the vibration reduction device further includes a bearing, which is disposed in the mounting through hole, and the rotating shaft is rotatably disposed in the mounting through hole via the bearing.

[0017] According to another aspect of the present invention, a compressor is provided, comprising a rotating shaft and the above-mentioned vibration reduction device.

[0018] Furthermore, the compressor also includes: an outer shell having an inner cavity, in which the vibration damping device and the rotating shaft are both located; a support frame, which is located in the inner cavity and fixedly connected to the inner wall of the outer shell; wherein the vibration damping body is fixedly arranged on the support frame.

[0019] Furthermore, the vibration damping device also includes a limit member, which is fixedly connected to the damper; the end of the rotating shaft close to the damper has an annular groove and a shoulder, and a part of the limit member is located in the annular groove to limit the axial position of the rotating shaft; the shoulder is located between the annular groove and the damper, and abuts against the damper.

[0020] Applying the technical solution of the present invention, the present invention provides a vibration damping device, which is used to reduce vibration of a rotating shaft. The vibration damping device includes: a vibration damping body, the vibration damping body having a vibration damping cavity and a mounting through hole arranged at intervals, and magnetorheological fluid is contained in the vibration damping cavity; a damper, the damper is elastically connected to the vibration damping body along the axial direction of the mounting through hole, a part of the damper is passed through the vibration damping cavity, and the damper is matched with the axial limit of the rotating shaft; wherein, the mounting through hole is used to accommodate a rotatable rotating shaft, and when the rotating shaft vibrates axially, the part of the damper located in the vibration damping cavity stirs the magnetorheological fluid, and the magnetorheological fluid generates resistance to hinder the movement of the damper, so as to reduce vibration of the rotating shaft. The present invention effectively dampens axial vibration of the rotating shaft by cooperating with the vibration damper body and the damper, thereby increasing the service life of the rotating shaft and the compressor, reducing the vibration noise of the rotating shaft and the operating noise of the compressor, and keeping the overall noise level of the compressor at a reasonable level during operation. The present invention provides a damper that is elastically connected to the vibration damper body along the axial direction of the mounting hole, ensuring that the damper provides flexible support for the rotating shaft in the axial direction, allowing the rotating shaft to operate stably in a set position (for example, a position where the motor shaft and the stator are at the same height), while ensuring that the vibration of the vibration damper body and the damper itself does not affect the rotating shaft. By providing a magnetorheological fluid in the vibration damper cavity, the damper is effectively and stably delayed when the damper moves due to vibration, thereby stably and efficiently damping the vibration of the rotating shaft, effectively reducing the movement of the rotating shaft when subjected to fluctuating axial gas forces, and ensuring the smooth operation of the compressor. Unlike existing vibration damping devices that only provide radial vibration damping for the rotating shaft and its shaft system, the present invention effectively damps the vibration of the compressor shaft system (especially for scroll compressors) when axial movement occurs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0022] Figure 1 An exploded view of a compressor structure including a damping device according to an embodiment of the present invention is shown;

[0023] Figure 2 A full cross-sectional view of a compressor structure including a damping device provided by an embodiment of the present invention is shown;

[0024] Figure 3 Shown Figure 2 Full cross-sectional view along the AA axis;

[0025] Figure 4 A schematic diagram showing the specific structure of a damper provided by an embodiment of the present invention is shown;

[0026] Figure 5 A schematic diagram showing the specific structure of the vibration reduction body provided by an embodiment of the present invention is shown;

[0027] Figure 6 Shown Figure 5 Top view in ;

[0028] Figure 7 Shown Figure 6 Full cross-sectional view in the mid-CC direction;

[0029] Figure 8 shows a top view of a sealing end cap provided by an embodiment of the present invention;

[0030] Figure 9 Shown Figure 8 Full cross-sectional view along the EE direction.

[0031] The above drawings include the following reference numerals:

[0032] 10. Vibration reduction body; 11. Vibration reduction cavity; 12. Mounting through hole;

[0033] 20. Damper; 21. Thrust plate; 22. Damping plate;

[0034] 30. Magnet portion; 31. Iron core; 32. Coil;

[0035] 40. Elastic parts;

[0036] 50. Limiting parts;

[0037] 60. Sealing end cap; 61. Sealing hole; 62. Through hole; 63. First sealing end cap; 64. Second sealing end cap;

[0038] 70. Sealing ring;

[0039] 80. Rotating shaft; 81. Ring groove; 82. Shaft shoulder;

[0040] 90, outer shell; 91, inner cavity;

[0041] 100, support frame;

[0042] 110. Bearings. DETAILED DESCRIPTION

[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative work are within the scope of protection of the present invention.

[0044] like Figures 1 to 9 As shown, an embodiment of the present invention provides a vibration damping device, which is used to reduce vibration of a rotating shaft 80. The vibration damping device includes: a vibration damping body 10, the vibration damping body 10 has a vibration damping cavity 11 and a mounting through hole 12 arranged at intervals, and the vibration damping cavity 11 contains magnetorheological fluid; a damper 20, the damper 20 is elastically connected to the vibration damping body 10 along the axial direction of the mounting through hole 12, a part of the damper 20 is passed through the vibration damping cavity 11, and the damper 20 is axially limited with the rotating shaft 80; wherein, the mounting through hole 12 is used to accommodate a rotatable rotating shaft 80, and when the rotating shaft 80 vibrates axially, the part of the damper 20 located in the vibration damping cavity 11 stirs the magnetorheological fluid, and the magnetorheological fluid generates resistance to hinder the movement of the damper 20, so as to reduce vibration of the rotating shaft 80.

[0045] The present invention cooperates with the vibration-damping body 10 and the damper 20 to effectively damp the vibration when the shaft 80 vibrates axially, thereby increasing the service life of the shaft 80 and the compressor, reducing the vibration noise of the shaft 80 and the operating noise of the compressor, and ensuring that the overall noise of the compressor during operation is at a reasonable level; the present invention arranges the damper 20 to be elastically connected to the vibration-damping body 10 along the axial direction of the mounting through hole 12, thereby ensuring that the damper 20 provides flexible support for the shaft 80 in the axial direction, so that the shaft 80 can operate stably in a set position (for example, the motor shaft 80 and the stator are at the same height), and ensures that the vibration of the vibration-damping body and the damper 20 themselves will not affect the shaft 80; by arranging a magnetorheological fluid in the vibration-damping cavity 11, the damper 20 is effectively and steadily delayed when the damper 20 moves due to vibration, thereby stably and efficiently damping the vibration of the shaft 80, effectively reducing the movement of the shaft 80 when subjected to fluctuating axial gas force, and ensuring the smooth operation of the compressor. Different from the existing vibration reduction device which only reduces radial vibration of the rotating shaft 80 and its shaft system, the present invention achieves effective vibration reduction of the shaft system of the compressor (especially the scroll compressor) when axial movement occurs.

[0046] It should be noted that: in a specific embodiment of the present invention, the compressor is a scroll compressor. When the scroll compressor is shut down, the coil 32 is de-energized. At this time, the weight of the entire shaft system (that is, the shaft and its surrounding components) is directly borne by the damping plate 22, and the elastic member 40 (for example, a spring) plays a role, supporting the damping plate 22 and the shaft 80 through elastic force to ensure that the shaft (that is, the motor rotor) is at the same height as the stator, thereby ensuring the normal rotation of the shaft.

[0047] Specifically, the vibration damping device also includes a magnet portion 30, which is disposed within the vibration damping cavity 11. The magnet portion 30 generates a magnetic field that affects the resistance generated by the magnetorheological fluid. Magnetorheological fluid is a fluid with variable flowability. In the absence of an external magnetic field, it exhibits low viscosity, but in the presence of an applied magnetic field, it exhibits high viscosity and low flow. The magnetic field generated by the magnet portion 30 can influence changes in the magnetorheological fluid, thereby generating resistance that hinders the movement of the damper 20, thereby reducing vibration of the rotating shaft 80.

[0048] like Figure 1 、 Figure 2 、 Figure 3 and Figure 5As shown, the magnet portion 30 includes an iron core 31 and a coil 32. The iron core 31 is fixedly mounted within the vibration damping cavity 11, and the coil 32 is wound around the iron core 31. By adjusting the current within the coil 32, the magnetic field strength is adjusted, thereby adjusting the resistance generated by the magnetorheological fluid. By configuring the magnet portion 30 as an electromagnet and adjusting the magnetic field strength of the electromagnet, the resistance generated by the magnetorheological fluid can be effectively adjusted (for example, increasing or decreasing the resistance), making the vibration damping device more controllable and applicable.

[0049] In a specific embodiment of the present invention, the iron core 31 and the vibration-damping body 10 are integrated into one structure to ensure the simplicity of the overall structure and thus reduce costs.

[0050] Optionally, the magnet portion 30 includes a permanent magnet, which is fixedly arranged in the vibration damping cavity 11 and generates a magnetic field to increase the resistance generated by the magnetorheological fluid. Figure 5 A permanent magnet is provided at the position of the middle iron core 31 , thereby ensuring the simplicity and miniaturization of the magnet part 30 .

[0051] like Figure 4 As shown, the damper 20 includes: a thrust plate 21, which is elastically connected to the vibration damping body 10 along the axial direction of the mounting through hole 12 and is limitedly engaged with the rotating shaft 80; a damping plate 22, which is arranged on the thrust plate 21 and moves along the axis of the mounting through hole 12 with the thrust plate 21; the damping plate 22 extends along the axis of the mounting through hole 12 and passes through the vibration damping cavity 11; the portion of the damping plate 22 in the vibration damping cavity 11 is in contact with the magnetorheological fluid, and the resistance acts on the damping plate 22. By setting the thrust plate 21, the thrust plate 21 axially limits the rotating shaft 80 to provide reliable support; by setting the damping plate 22 to extend along the axis of the mounting through hole 12, the resistance acts directly on the damping plate 22 without affecting the reliable support of the thrust plate 21 for the rotating shaft 80. At the same time, the shape, surface roughness, material and other parameters of the damping plate 22 can be separately set to adapt to actual needs, thereby improving the applicability and working reliability of the damper 20.

[0052] like Figure 1 and Figure 2As shown, the shape of the damping plate 22 matches the shape of the vibration damping cavity 11. The vibration damping device also includes an iron core 31 and a coil 32. The iron core 31 is fixedly mounted within the vibration damping cavity 11, and the coil 32 is wound around the iron core 31 to form an electromagnet. The magnetic flux lines of the magnetic field generated by the electromagnet are perpendicular to the surface of the damping plate 22, so that the resistance generated by the magnetorheological fluid is along the axis of the rotating shaft 80. This arrangement ensures that the direction of the resistance is along the axis of the rotating shaft 80 and parallel to the extension direction of the damping plate 22, thereby improving the vibration damping effect. When the rotating shaft 80 moves axially, the rotating shaft 80 drives the damping plate 22 to move axially. The damping plate 22 moves perpendicular to the direction of the magnetic flux lines of the magnetic field. The magnetorheological fluid exhibits high viscosity, low flow characteristics and generates shear resistance on the damping plate 22, attenuating the axial movement of the rotating shaft 80 and its shaft system, thereby reducing the noise and vibration of the compressor.

[0053] In a specific embodiment of the present invention, Figure 7 As shown, the coil 32 is wound around Figure 7 By controlling the winding direction and position of the coil 32 on the part of the middle iron core 31 close to the inner wall of the vibration damping cavity 11, the direction of the electromagnet magnetic field is effectively adjusted, and can be flexibly set according to actual use requirements.

[0054] like Figure 4 、 Figure 5 and Figure 6 As shown, the iron core 31 is in the shape of a triangular prism, and the damping plate 22 is a V-shaped plate. The V-shaped plate has a first plate surface and a second plate surface, which are angled together. The first plate surface is arranged parallel to one side surface of the iron core 31, and the second plate surface is arranged parallel to another side surface of the iron core 31. The resistance generated by the magnetorheological fluid acts on the first plate surface and the second plate surface respectively. This arrangement not only ensures the overall rigidity and strength of the vibration damping body 10 (because the cross-sectional shape of the vibration damping cavity 11 and the cross-sectional shape of the iron core 31 are both stable triangles), but also ensures that the resistance acts on the first plate surface and the second plate surface respectively, parallel to the extension direction of the first plate surface and the second plate surface, thereby improving the vibration damping effect.

[0055] like Figure 3 As shown, multiple vibration damping cavities 11 are spaced apart along the circumference of the mounting through-hole 12 on the vibration damping body 10; multiple damping plates 22 are spaced apart on the thrust plate 21, and the multiple damping plates 22 are arranged in a one-to-one correspondence with the multiple vibration damping cavities 11. This one-to-one correspondence between the multiple damping plates 22 and the multiple vibration damping cavities 11 further ensures the vibration damping effect of the vibration damping device. In actual use, the number of damping plates 22 and vibration damping cavities 11 can be flexibly adjusted according to actual needs.

[0056] In a specific embodiment of the present invention, Figure 1 、 Figure 2 and Figure 3As shown, there are six damping plates 22 and six vibration reduction cavities 11 , which are evenly distributed relative to the mounting through holes 12 , thus ensuring the simplification and miniaturization of the overall structure while meeting the vibration reduction requirements.

[0057] like Figure 1 As shown, the vibration damping device further includes an elastic member 40, which is respectively engaged with the damper 20 and the vibration damping body 10 in a limited manner along the axial direction of the mounting through hole 12 to achieve an elastic connection between the damper 20 and the vibration damping body 10. The provision of the elastic member 40 ensures that the damper 20 provides flexible support for the rotating shaft 80 in the axial direction. This not only allows the rotating shaft 80 to operate stably in a set position (for example, the motor rotating shaft 80 is at the same height as the stator), but also ensures that the vibration of the vibration damping body and the damper 20 themselves does not affect the rotating shaft 80 (usually, other vibrations of the compressor will cause the vibration of the vibration damping body and the damper 20).

[0058] like Figure 1 and Figure 2 As shown, the vibration damping device further includes a stopper 50, which is fixedly connected to the damper 20 and engages with the rotating shaft 80 in both axial directions. The stopper 50 ensures reliable axial restraint of the rotating shaft 80 while not affecting its own rotation.

[0059] like Figure 1 、 Figure 8 and Figure 9 As shown, the vibration damping device further includes: a sealing end cap 60, which is disposed on the vibration damping body 10 and is used to shield the vibration damping cavity 11; the sealing end cap 60 has a sealing hole 61 and a through hole 62, wherein the sealing hole 61 is connected to the vibration damping cavity 11, and the through hole 62 is connected to the mounting through hole 12; and a sealing ring 70, which is disposed within the sealing hole 61. A portion of the damper 20 passes through the sealing hole 61, and the sealing ring 70 cooperates with the damper 20 to seal the sealing hole 61 to prevent leakage of the magnetorheological fluid. The provision of the sealing end cap 60 and the sealing ring 70 ensures the sealing of the vibration damping cavity 11, thereby preventing leakage of the magnetorheological fluid, while also enabling the damping plate 22 to reciprocate along the axial direction of the rotating shaft 80.

[0060] like Figure 1 As shown, there are two sealing end caps 60, namely a first sealing end cap 63 and a second sealing end cap 64. The vibration damping cavity 11 extends through both ends of the vibration damping body 10 along the axis of the rotating shaft 80. The first sealing end cap 63 and the second sealing end cap 64 are respectively arranged at both ends of the vibration damping body 10, and cooperate with multiple sealing rings 70 to seal the vibration damping cavity 11. This arrangement further ensures that the sealing end caps 60 and the sealing rings 70 seal the vibration damping cavity 11, effectively preventing leakage of the magnetorheological fluid.

[0061] In a specific embodiment of the present invention, Figure 1 and Figure 2 As shown, there are 6 coils 32, and the 6 coils 32 are respectively wound on the 6 iron cores 31 in the 6 vibration damping cavities 11; the first sealing end cover 63 and the second sealing end cover 64 are respectively fixed to the two ends of the vibration damping body 10 by screws, and the first sealing end cover 63 and the second sealing end cover 64 respectively have 6 sealing holes 61, each sealing hole 61 is respectively equipped with a sealing ring 70 (a total of 12 sealing rings 70), and the thrust plate 21 has a thrust hole for limiting cooperation with the rotating shaft 80. The rotating shaft 80 passes through the through hole 62 of the first sealing end cover 63, the installation through hole 12, the through hole 62 of the second sealing end cover 64 and the thrust hole on the thrust plate 21 in sequence.

[0062] Specifically, if Figure 1 and Figure 2 As shown, the vibration reduction device further includes a bearing 110, which is disposed in the mounting through hole 12. The rotating shaft 80 is rotatably disposed in the mounting through hole 12 via the bearing 110. The provision of the bearing 110 not only effectively supports the rotating shaft 80, reduces deformation of the rotating shaft 80, but also allows the rotating shaft 80 to rotate smoothly.

[0063] In a specific embodiment of the present invention, the bearing 110 is interference-fitted with the mounting through hole 12 so as to be fixed in the mounting through hole 12 along the axial direction of the mounting through hole 12 .

[0064] The present invention further provides a compressor comprising a rotating shaft 80 and the aforementioned vibration reduction device. The compressor provided by the present invention has a long service life, low operating noise, and reliable operation.

[0065] like Figure 1 As shown, the compressor further includes: a housing 90 having an inner cavity 91, in which the vibration damping device and the rotating shaft 80 are both located; a support frame 100, which is located in the inner cavity 91 and fixedly connected to the inner wall of the housing 90; wherein the vibration damping body 10 is fixedly mounted on the support frame 100. This arrangement ensures reliable fixation of the vibration damping device.

[0066] In a specific embodiment of the present invention, the support frame 100 is fixedly connected to the housing 90 by welding; and the vibration-damping body 10 is connected to the support frame 100 by screws.

[0067] Specifically, if Figure 2As shown, the vibration damping device further includes a stopper 50, which is fixedly connected to the damper 20. The end of the rotating shaft 80 near the damper 20 has an annular groove 81 and a shoulder 82. A portion of the stopper 50 is located within the annular groove 81 to axially limit the rotation shaft 80. The shoulder 82 is located between the annular groove 81 and the damper 20 and abuts against the damper 20. This arrangement ensures a simplified and lightweight overall structure of the stopper 50 while reliably constraining the rotating shaft 80 in the axial direction.

[0068] It should be noted that: in a specific embodiment of the present invention, the limit member 50 is fixed on the thrust plate 21 of the damper 20 by screws, and the limit member 50 is a split structure, that is, the part of the limit member 50 located in the annular groove 81 and the part where the limit member 50 cooperates with the thrust plate 21 are split structures, so as to facilitate the installation of the limit member 50.

[0069] In summary, the present invention provides a vibration reduction device and a scroll compressor. The present invention provides a vibration reduction body 10 and a damper 20 to cooperate with each other, effectively slowing down the vibration when the shaft 80 vibrates in the axial direction, thereby increasing the service life of the shaft 80 and the compressor, reducing the vibration noise of the shaft 80 and the operating noise of the compressor, and making the overall noise of the compressor at work at a reasonable level; the present invention provides a damper 20 elastically connected to the vibration reduction body 10 along the axial direction of the mounting through hole 12, ensuring that the damper 20 has an axial impact on the shaft 80. The flexible support not only allows the rotating shaft 80 to work stably at a set position (for example, the motor rotating shaft 80 and the stator are at the same height), but also ensures that the vibration of the shock absorbing body and the damper 20 itself will not affect the rotating shaft 80. By providing a magnetorheological fluid in the vibration-damping cavity 11, the damper 20 is effectively and steadily delayed when the damper 20 moves due to vibration, thereby stably and efficiently reducing the vibration of the rotating shaft 80, effectively reducing the movement of the rotating shaft 80 when it is subjected to fluctuating axial gas forces, and ensuring the smooth operation of the compressor. Unlike existing vibration-damping devices that only perform radial vibration reduction on the rotating shaft 80 and its shaft system, the present invention achieves effective vibration reduction of the shaft system of the compressor (especially the scroll compressor) when axial movement occurs.

[0070] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0071] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0072] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying 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 device or element 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 outline of each component itself.

[0073] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. 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 figures. For example, if the device in the 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.

[0074] 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. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0075] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A vibration damping device, characterized in that: The vibration reduction device is used to reduce vibration of the rotating shaft (80), and the vibration reduction device comprises: A vibration damping body (10), the vibration damping body (10) having a vibration damping cavity (11) and a mounting through hole (12) arranged at intervals, and magnetorheological fluid is contained in the vibration damping cavity (11); A damper (20), the damper (20) being elastically connected to the vibration damping body (10) along the axial direction of the mounting through hole (12), a portion of the damper (20) being disposed in the vibration damping cavity (11), and the damper (20) being axially limitedly engaged with the rotating shaft (80); The mounting through hole (12) is used to accommodate a rotatable shaft (80), and when the shaft (80) vibrates axially, the portion of the damper (20) located in the vibration-damping cavity (11) stirs the magnetorheological fluid, and the magnetorheological fluid generates resistance to hinder the movement of the damper (20), thereby reducing vibration of the shaft (80); The damper (20) comprises: a thrust plate (21), the thrust plate (21) being elastically connected to the vibration damping body (10) along the axial direction of the mounting through hole (12) and being limitedly matched with the rotating shaft (80); a damping plate (22), the damping plate (22) being arranged on the thrust plate (21) and moving along the axis of the mounting through hole (12) following the thrust plate (21); the damping plate (22) extending along the axis of the mounting through hole (12) and passing through the vibration damping cavity (11); a portion of the damping plate (22) in the vibration damping cavity (11) contacts the magnetorheological fluid, and the resistance acts on the damping plate (22); The shape of the damping plate (22) is adapted to the shape of the vibration damping cavity (11), and the vibration damping device further comprises an iron core (31) and a coil (32), wherein the iron core (31) is fixedly arranged in the vibration damping cavity (11), and the coil (32) is wound around the iron core (31) to form an electromagnet; the direction of the magnetic flux lines of the magnetic field generated by the electromagnet is perpendicular to the surface of the damping plate (22), so that the resistance generated by the magnetorheological fluid is along the axis of the rotating shaft (80); The iron core (31) is in the shape of a triangular prism, and the damping plate (22) is a V-shaped plate. The V-shaped plate has a first plate surface and a second plate surface, the first plate surface and the second plate surface have an included angle, the first plate surface is arranged parallel to one side surface of the iron core (31), and the second plate surface is arranged parallel to the other side surface of the iron core (31), and the resistance generated by the magnetorheological fluid acts on the first plate surface and the second plate surface respectively.

2. The vibration damping device according to claim 1, characterized in that: The vibration damping device further comprises a magnet portion (30), which is arranged in the vibration damping cavity (11). The magnet portion (30) can generate a magnetic field to affect the resistance generated by the magnetorheological fluid.

3. The vibration damping device according to claim 2, characterized in that: The magnet portion (30) comprises an iron core (31) and a coil (32), wherein the iron core (31) is fixedly disposed in the vibration damping cavity (11), and the coil (32) is wound around the iron core (31). By adjusting the current in the coil (32), the magnetic field strength is adjusted to adjust the resistance generated by the magnetorheological fluid.

4. The vibration damping device according to claim 2, characterized in that: The magnet portion (30) includes a permanent magnet, which is fixedly arranged in the vibration damping cavity (11). The permanent magnet generates a magnetic field to increase the resistance generated by the magnetorheological fluid.

5. The vibration damping device according to claim 1, characterized in that: There are a plurality of vibration damping cavities (11), which are arranged on the vibration damping body (10) at intervals along the circumference of the mounting through hole (12); there are a plurality of damping plates (22), which are arranged on the thrust plate (21) at intervals, and the plurality of damping plates (22) are arranged in a one-to-one correspondence with the plurality of vibration damping cavities (11).

6. The vibration damping device according to claim 1, characterized in that: The vibration damping device further comprises an elastic member (40), wherein the elastic member (40) is respectively engaged with the damper (20) and the vibration damping body (10) in a limiting manner along the axial direction of the mounting through hole (12), so as to realize elastic connection between the damper (20) and the vibration damping body (10).

7. The vibration damping device according to claim 1, characterized in that: The vibration damping device further comprises a limiting member (50), wherein the limiting member (50) is fixedly connected to the damper (20), and the limiting member (50) and the rotating shaft (80) are in limiting cooperation in both axial directions.

8. The vibration damping device according to claim 1, wherein: The vibration reduction device further comprises: a sealing end cover (60), the sealing end cover (60) being arranged on the vibration damping body (10) and being used to shield the vibration damping cavity (11); the sealing end cover (60) having a sealing hole (61) and a through hole (62), the sealing hole (61) being in communication with the vibration damping cavity (11), and the through hole (62) being in communication with the mounting through hole (12); A sealing ring (70), the sealing ring (70) being arranged in the sealing hole (61); Part of the damper (20) passes through the sealing hole (61), and the sealing ring (70) cooperates with the damper (20) to seal the sealing hole (61) to prevent leakage of the magnetorheological fluid.

9. The vibration damping device according to claim 8, characterized in that: There are two sealing end covers (60), namely a first sealing end cover (63) and a second sealing end cover (64). The vibration damping cavity (11) passes through both ends of the vibration damping body (10) along the axis of the rotating shaft (80). The first sealing end cover (63) and the second sealing end cover (64) are respectively arranged at both ends of the vibration damping body (10) and cooperate with the plurality of sealing rings (70) to seal the vibration damping cavity (11).

10. The vibration damping device according to claim 1, wherein: The vibration damping device further comprises a bearing (110), wherein the bearing (110) is disposed in the mounting through hole (12), and the rotating shaft (80) is rotatably disposed in the mounting through hole (12) via the bearing (110).

11. A compressor, characterized in that: It comprises a rotating shaft (80) and the vibration damping device according to any one of claims 1 to 10.

12. The compressor according to claim 11, characterized in that The compressor further comprises: A housing (90), the housing (90) having an inner cavity (91), the vibration damping device and the rotating shaft (80) both being located in the inner cavity (91); a support frame (100), the support frame (100) being located in the inner cavity (91) and fixedly connected to the inner wall of the outer shell (90); Wherein, the vibration-damping body (10) is fixedly arranged on the support frame (100).

13. The compressor according to claim 11, characterized in that The vibration damping device further includes a limiting member (50), wherein the limiting member (50) is fixedly connected to the damper (20); an end of the rotating shaft (80) close to the damper (20) has an annular groove (81) and a shaft shoulder (82), and a portion of the limiting member (50) is located in the annular groove (81) to limit the axial position of the rotating shaft (80); the shaft shoulder (82) is located between the annular groove (81) and the damper (20), and abuts against the damper (20).

Images