Damping device and frequency conversion equipment

Abstract

The utility model relates to the technical field of damping devices, in particular to a damping device and frequency conversion equipment, the damping device comprises a supporting mechanism, an adjusting mechanism, a buffering mechanism and a control mechanism, and the supporting mechanism comprises a supporting piece used for supporting a unit; the adjusting mechanism is arranged on the supporting mechanism and provided with a supporting part stretching and retracting in the first direction. The buffering mechanism is arranged on the supporting part of the adjusting mechanism, the end, away from the buffering mechanism, of the buffering mechanism is connected with the supporting piece, and the elasticity of the buffering mechanism in the first direction changes along with the length change of the buffering mechanism in the first direction. The control mechanism is used for obtaining vibration information of the unit and controlling the adjusting mechanism to act according to the vibration information of the unit, the damping device can adjust the fixed frequency of the damping device according to the vibration frequency generated by the unit, broadband damping of the unit is achieved, and the damping effect is improved.

Description

Technical Field

[0001] The present application relates to the technical field of shock absorbing devices, and in particular to a shock absorbing device and a frequency conversion device. Background Art

[0002] Large centrifugal and screw air conditioners will continue to generate large vibrations during normal operation, which will be transmitted to the floor slab, causing vibration and noise on the floor slab, affecting the normal life of people inside the building, and the vibration will also have an adverse effect on the performance and service life of the air conditioner. Installing air conditioner vibration dampers on large units can effectively isolate the vibration caused by the air conditioner unit from the floor slab, achieving a vibration reduction effect.

[0003] However, the frequency of the variable frequency unit compressor can be changed when it is running, so the frequency of the vibration caused can be changed. However, the stiffness of the shock absorber is fixed at present. When the excitation frequency is close to the resonance frequency of the main system, the shock absorption effect of the shock absorber is very limited. For variable frequency excitation, its shock absorption performance is greatly reduced. Utility Model Content

[0004] The purpose of the present application is to provide a shock absorbing device and a frequency conversion device, wherein the shock absorbing device can adjust its own fixed frequency according to the vibration frequency generated by the unit, thereby achieving broadband shock absorption of the unit and improving the shock absorption effect.

[0005] To this end, on the first aspect, an embodiment of the present application provides a shock absorbing device, comprising: a supporting mechanism, the supporting mechanism comprising a supporting member for supporting the unit; an adjusting mechanism, arranged on the supporting mechanism, the adjusting mechanism having a supporting portion that can be extended and retracted along a first direction; a buffer mechanism, arranged on the supporting portion of the adjusting mechanism, the buffer mechanism being connected to the supporting member at one end away from the buffer mechanism, the elasticity of the buffer mechanism along the first direction changes as its length along the first direction changes; and a control mechanism, for acquiring vibration information of the unit and controlling the action of the adjusting mechanism according to the vibration information of the unit.

[0006] In one possible implementation, the buffer mechanism includes: a fixed plate and a buffer plate spaced apart along a first direction, the fixed plate connected to the support mechanism, the fixed plate connected to the support member, the buffer plate connected to the support portion of the adjustment mechanism; and an elastic component, the two ends of the elastic component along the first direction are respectively connected to the fixed plate and the buffer plate.

[0007] In one possible implementation, the elastic component includes a plurality of first elastic members, which enclose a frame-type structure. The first elastic members include a central leaf spring and arc leaf springs disposed at both ends of the central leaf spring. The two ends of the arc leaf spring are respectively connected to a fixed plate and a buffer plate.

[0008] In a possible implementation, the elastic component further includes a first connecting member disposed on the fixing plate and the buffer plate, the end of the arc leaf spring is connected to the first connecting member, and the ends of two adjacent arc leaf springs are connected via the first connecting member.

[0009] In a possible implementation, the elastic component also includes: a second connecting member, located between the fixed plate and the buffer plate; and a plurality of variable stiffness springs, one end of the plurality of variable stiffness springs is connected to the second connecting member, and the other ends of the plurality of variable stiffness springs are respectively connected to the plurality of first connecting members.

[0010] In a possible implementation, the support mechanism also includes: a base plate; a support frame, which is arranged on the base plate and connected to the support member and the fixed plate; and a limit plate, which is arranged in the support frame, the limit plate extends along a first direction, and the limit plate abuts against the buffer plate on one side of the buffer mechanism.

[0011] In a possible implementation, the support frame includes a frame and a support rod arranged on the frame, the frame is connected to the fixing plate, the support rod is connected to the support member, a damping ring is arranged on the outer side of the support rod, and the damping ring abuts against the support member and / or the frame.

[0012] In a possible implementation, a fixing column is provided on the fixing plate, and the fixing plate is connected to the support member via the fixing column.

[0013] In a possible implementation, the buffer mechanism further includes a variable damper, which is disposed on the fixed plate or the buffer plate. The variable damper is electrically connected to the control mechanism and can adjust its own damping characteristics according to a signal output by the control mechanism.

[0014] In a possible implementation, the variable damper includes: a box body, in which an electric variable fluid is filled; a wire, which is wound around the box body; and a spring column, one end of which extends into the box body and can move along a first direction, and the other end is connected to an elastic component; wherein the electric variable fluid can change its viscosity as the current in the wire changes.

[0015] In a possible implementation, the variable damper further includes a current control module, which is electrically connected to the control mechanism and is used to control the magnitude of the current in the wire.

[0016] In a possible implementation, the control mechanism includes a vibration sensor disposed on the support mechanism and a controller electrically connected to the vibration sensor, and the vibration sensor is used to detect vibration information of the unit.

[0017] In a second aspect, an embodiment of the present application provides a compressor unit, comprising: a unit; and the above-mentioned shock absorbing device.

[0018] According to the shock absorbing device and frequency conversion equipment provided in the embodiments of the present application, the shock absorbing device obtains the vibration information of the unit through the control mechanism, and controls the support part of the adjustment mechanism to extend and retract along the first direction according to the vibration information of the unit. The support part changes the length of the buffer mechanism in the first direction, and changes its own elasticity through the change of the length of the buffer mechanism in the first direction, thereby changing the natural frequency of the buffer mechanism itself, and can adjust its own fixed frequency according to the vibration frequency generated by the unit, thereby realizing wide-band shock absorption of the unit and improving the shock absorption effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0021] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0022] Figure 1 A schematic structural diagram of a shock absorbing device provided in an embodiment of the present application is shown;

[0023] Figure 2 A schematic diagram of the planar structure of a shock absorbing device provided in an embodiment of the present application is shown;

[0024] Figure 3 A schematic diagram showing the structure of a shock absorbing device provided in an embodiment of the present application when supporting a unit;

[0025] Figure 4 A schematic diagram of the three-dimensional structure of a buffer mechanism provided in an embodiment of the present application is shown;

[0026] Figure 5 A schematic structural diagram of a first connecting member, a second connecting member and a rigid spring provided in an embodiment of the present application is shown;

[0027] Figure 6 A schematic structural diagram of a first elastic member provided in an embodiment of the present application is shown;

[0028] Figure 7 A schematic diagram of the three-dimensional structure of an adjustment mechanism provided in an embodiment of the present application is shown;

[0029] Figure 8 A schematic structural diagram of a support rod and a damping ring provided in an embodiment of the present application is shown;

[0030] Fig. 9 A schematic diagram of the three-dimensional structure of a variable damper provided in an embodiment of the present application is shown;

[0031] Fig.10 A schematic cross-sectional structure diagram of a variable damper provided in an embodiment of the present application is shown;

[0032] Fig.11 A schematic diagram showing the stiffness and damping adjustment of a shock absorbing device provided in an embodiment of the present application;

[0033] Fig.12 A vibration isolation rate diagram of a shock absorbing device provided in an embodiment of the present application at different damping ratios is shown.

[0034] Description of reference numerals:

[0035] X, first direction;

[0036] 1. Support mechanism; 11. Support member; 12. Bottom plate; 13. Support frame; 131. Frame; 132. Support rod; 133. Damping ring; 14. Limiting plate;

[0037] 2. Adjustment mechanism; 21. Support part; 22. Hydraulic assembly; 221. First hydraulic rod; 222. Second hydraulic rod; 223. Main hydraulic rod;

[0038] 3. Buffer mechanism; 31. Fixed plate; 32. Buffer plate; 33. Fixed column; 34. Elastic component; 341. First elastic member; 3411. Center leaf spring; 3412. Arc leaf spring; 342. First connecting member; 343. Second connecting member; 344. Variable stiffness spring; 35. Variable damper; 351. Box body; 352. Wire; 353. Spring column; 354. Current control module;

[0039] 4. Control mechanism; 41. Vibration sensor; 42. Controller. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0041] The disclosure below provides many different embodiments or examples to realize the different structures of the embodiments of the present application. In order to simplify the disclosure of the embodiments of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the embodiments of the present application. In addition, the embodiments of the present application can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0042] For ease of description, spatial relative terms may be used herein to describe the relative positional relationship or movement of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip or a posture change or a motion state change, then these directional indications also change accordingly, for example: an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative descriptors used herein are interpreted accordingly.

[0043] In order to solve the problems in the prior art, the present application provides a shock absorbing device and a frequency conversion device. The shock absorbing device can adjust its own fixed frequency according to the vibration frequency generated by the unit, thereby achieving wide-band shock absorption of the unit and improving the shock absorption effect.

[0044] Figure 1 A schematic structural diagram of a shock absorbing device provided in an embodiment of the present application is shown; Figure 2 A schematic diagram of the planar structure of a shock absorbing device provided in an embodiment of the present application is shown; Figure 3 A schematic diagram showing the structure of a shock absorbing device provided in an embodiment of the present application when supporting a unit;

[0045] Figure 4 A schematic diagram of the three-dimensional structure of a buffer mechanism provided in an embodiment of the present application is shown; Figure 5 A schematic structural diagram of a first connecting member, a second connecting member and a rigid spring provided in an embodiment of the present application is shown; Figure 6 A schematic structural diagram of a first elastic member provided in an embodiment of the present application is shown; Figure 7 A schematic diagram of the three-dimensional structure of an adjustment mechanism provided in an embodiment of the present application is shown;

[0046] Figure 8 A schematic structural diagram of a support rod and a damping ring provided in an embodiment of the present application is shown; Fig. 9 A schematic diagram of the three-dimensional structure of a variable damper provided in an embodiment of the present application is shown; Fig.10 A schematic cross-sectional structure diagram of a variable damper provided in an embodiment of the present application is shown; Fig.11 A schematic diagram showing the stiffness and damping adjustment of a shock absorbing device provided in an embodiment of the present application; Fig.12 A vibration isolation rate diagram of a shock absorbing device provided in an embodiment of the present application at different damping ratios is shown.

[0047] like Figure 1-12 As shown, an embodiment of the present application provides a shock absorbing device, including: a supporting mechanism 1, an adjusting mechanism 2, a buffering mechanism 3 and a control mechanism 4.

[0048] The supporting mechanism 1 comprises a supporting member 11 for supporting the machine set.

[0049] The adjustment mechanism 2 is disposed on the support mechanism 1 , and the adjustment mechanism 2 has a support portion 21 that is telescopic along the first direction X.

[0050] The buffer mechanism 3 is arranged on the support portion 21 of the adjustment mechanism 2, and one end of the buffer mechanism 3 away from the buffer mechanism 3 is connected to the support member 11, and the elasticity of the buffer mechanism 3 along the first direction X changes with the length of the buffer mechanism 3 along the first direction X. Specifically, the first direction X in the present application is a vertical direction, and the buffer mechanism 3 supports the bottom of the unit; of course, the first direction X can also be a horizontal direction or other directions, and the side of the unit and other positions are supported and buffered.

[0051] The control mechanism 4 is used to obtain the vibration information of the unit and control the operation of the regulating mechanism 2 according to the vibration information of the unit. Specifically, the control mechanism 4 can obtain the vibration information of the unit according to the operating frequency of the unit (different operating frequencies of the unit correspond to different vibration frequencies), and control the operation of the regulating mechanism 2 according to the vibration information of the unit; the control mechanism 4 can also obtain the vibration information of the unit through the detection component, and control the operation of the regulating mechanism 2 according to the vibration information of the unit.

[0052] In the present application, the vibration information of the unit is obtained by the control mechanism 4, and the support part 21 of the adjustment mechanism 2 is controlled to extend and retract along the first direction X according to the vibration information of the unit. The support part 21 changes the length of the buffer mechanism 3 in the first direction X, and changes its own elasticity through the change of the length of the buffer mechanism 3 in the first direction X, thereby changing the natural frequency of the buffer mechanism 3 itself, and can adjust its own fixed frequency according to the vibration frequency generated by the unit, thereby realizing broadband shock absorption of the unit and improving the shock absorption effect.

[0053] The unit in the present application is a variable frequency unit, and its frequency can be changed during operation, so that the vibration frequency caused can be changed. In a specific embodiment, the unit is an air conditioning unit.

[0054] In the related art, the stiffness of the shock absorber of the current air-conditioning unit is fixed. When the excitation frequency is close to the resonance frequency of the main system, the shock absorption effect of the shock absorber is very limited. For variable frequency excitation, its shock absorption performance is greatly reduced.

[0055] In the embodiment of the present application, the real-time vibration information of the unit is obtained through the control mechanism, and a control signal is output to the adjustment mechanism 2 according to the established control algorithm. The adjustment mechanism 2 controls the extension and retraction of the support part 21, and the support part 21 changes the length of the buffer mechanism 3 in the first direction X, thereby changing the stiffness of the buffer mechanism 3, and then changing the fixed frequency of the buffer mechanism 3 itself, thereby realizing broadband shock absorption of the unit and improving the shock absorption effect.

[0056] In some embodiments, the buffer mechanism 3 includes: a fixed plate 31 and a buffer plate 32 arranged at intervals along the first direction X, the fixed plate 31 is connected to the support mechanism 1, the fixed plate is connected to the support member 11, and the buffer plate 32 is connected to the support part 21 of the adjustment mechanism 2; and an elastic component 34, the elastic component 34 is respectively connected to the fixed plate 31 and the buffer plate 32 at both ends along the first direction X.

[0057] In the present application, the fixed plate 31 is fixedly connected to the supporting mechanism 1, the supporting member 11 is connected to the unit, and most of the vibration of the unit is transmitted to the fixed plate 31. The buffer plate 32 is located below the fixed plate 31, and an elastic component 34 is arranged between the fixed plate 31 and the buffer plate 32. The buffer plate 32 is connected to the supporting portion 21 of the adjusting mechanism 2, and can move along the first direction X with the supporting portion 21, thereby compressing the elastic component 34 between the fixed plate 31 and the buffer plate 32. By changing the compression amount of the elastic component 34 to change its natural frequency, the difference between the natural frequency of the elastic component 34 and the unit frequency is increased to avoid the resonance of the unit and the shock absorbing device, thereby improving the broadband shock absorption of the unit, effectively reducing the low-frequency vibration generated by the unit, increasing the applicability and reliability of the shock absorbing device, and improving the shock absorption effect.

[0058] In some embodiments, the elastic component 34 includes a plurality of first elastic members 341, and the plurality of first elastic members 341 form a frame-type structure. The first elastic member 341 includes a central plate spring 3411 and an arc-shaped plate spring 3412 arranged at both ends of the central plate spring 3411, and the two ends of the arc-shaped plate spring 3412 are respectively connected to the fixing plate 31 and the buffer plate 32.

[0059] In the present application, a plurality of first elastic members 341 enclose a frame structure to support the fixed plate 31 and the buffer plate 32, and can be connected to the fixed plate 31 and the buffer plate 32 at multiple points to ensure the stability of the structure of the buffer mechanism 3. When the buffer plate 32 moves along the first direction X, it remains parallel to the fixed plate 31, so that the compression amount of different positions of the elastic component 34 is the same, thereby achieving precise control of the stiffness of the entire elastic component 34, which can further improve the control accuracy of the stiffness of the buffer mechanism 3, and thus improve the buffering effect of the unit.

[0060] Specifically, the two ends of the arc leaf spring 3412 are respectively connected to the fixed plate 31 and the buffer plate 32. When the distance between the fixed plate 31 and the buffer plate 32 changes, the compression amount of the arc leaf spring 3412 changes, thereby changing the rigidity of the elastic component 34. Moreover, when the compression amount of the arc leaf spring 3412 changes, the compression amount of the center leaf spring 3411 will also change, which can further improve the adjustment effect of the rigidity of the elastic component 34. Specifically, the two ends of the center plate spring 3411 are connected to the side of the arc plate spring 3412 away from the opening. When the buffer plate 32 moves upward, the distance between the fixed plate 31 and the buffer plate 32 becomes smaller, the compression of the arc plate spring 3412 becomes larger, and at the same time, the compression of the arc plate spring 3412 at both ends on the middle center plate spring 3411 increases; when the buffer plate 32 moves downward, the distance between the fixed plate 31 and the buffer plate 32 increases, the compression of the arc plate spring 3412 becomes smaller, and the compression of the arc plate spring 3412 at both ends on the middle center plate spring 3411 becomes smaller; the elastic supporting force of the elastic member can be effectively increased, and the rigidity of the elastic component 34 can be finely controlled.

[0061] In a specific embodiment, four first elastic members 341 are provided, and the four first elastic members 341 form a rectangular structure, wherein two first elastic members 341 are respectively the long sides of the rectangular structure, and the other two first elastic members 341 are respectively the short sides of the rectangular structure. Optionally, the four first elastic members 341 can also form a square structure. The number of the first elastic members 341 can also be 5 or 6, etc., for forming a pentagon or a hexagon, etc.

[0062] In some embodiments, the elastic component 34 also includes a first connecting member 342 disposed on the fixing plate 31 and the buffer plate 32 , the end of the arc leaf spring 3412 is connected to the first connecting member 342 , and the ends of two adjacent arc leaf springs 3412 are connected through the first connecting member 342 .

[0063] like Figure 6As shown, in the present application, the arc leaf spring 3412 is a semi-arc structure, and the two end points are respectively connected to the fixed plate 31 and the buffer plate 32 through the first connecting member 342. By changing the distance between the fixed plate 31 and the buffer plate 32, the compression amount of the arc leaf spring 3412 is changed, and then its stiffness is adjusted. Specifically, the first connecting member 342 is a hinge ball, which facilitates the connection of the arc leaf spring 3412 with the fixed plate 31 and the buffer plate 32; and two adjacent arc leaf springs 3412 are connected through the first connecting member 342, so that multiple first elastic members 341 are surrounded by a stable frame structure to ensure the stability of its support.

[0064] like Figure 5 As shown, in some embodiments, the elastic component 34 further includes: a second connecting member 343 and a plurality of variable stiffness springs 344 .

[0065] The second connecting member 343 is located between the fixing plate 31 and the buffer plate 32 .

[0066] One ends of the plurality of variable rigidity springs 344 are connected to the second connecting member 343 , and the other ends of the plurality of variable rigidity springs 344 are respectively connected to the plurality of first connecting members 342 .

[0067] In the present application, the overall stiffness of the shock absorbing device is composed of two parts: the fixed stiffness and the stiffness of the elastic component 34 in the first direction X. The fixed stiffness is the stiffness of the supporting mechanism 1 itself, which is immutable, while the stiffness of the elastic component 34 is adjusted by the elastic changes of the center plate spring 3411, the arc plate spring 3412 and the variable stiffness spring 344. Specifically, when the buffer plate 32 moves upward, the compression of the arc plate spring 3412 increases, the compression of the center plate spring 3411 increases, and the compression of the variable stiffness spring 344 increases; when the buffer plate 32 moves downward, the compression of the arc plate spring 3412 decreases, the compression of the center plate spring 3411 decreases, and the compression of the variable stiffness spring 344 decreases. By changing the elastic recovery of the center leaf spring 3411, the arc leaf spring 3412 and the variable stiffness spring 344, the stiffness of the elastic component 34 in the vertical direction is changed, thereby changing the stiffness of the entire shock absorbing device, which can further improve the elastic supporting force and the accuracy of the stiffness adjustment, thereby improving the buffering effect on the unit.

[0068] Specifically, the second connecting member 343 is a central ball, which is arranged between the fixed plate 31 and the buffer plate 32, and is connected to the fixed plate 31 or the buffer plate 32 through a connecting member, forming a restraining force with multiple first connecting members 342, which can further improve the stability of the entire elastic component 34 structure and improve the stability of the support.

[0069] In some embodiments, the support mechanism 1 further includes: a base plate 12 , a support frame 13 and a limiting plate 14 .

[0070] The support frame 13 is disposed on the bottom plate 12 , and the support frame 13 is connected to the support member 11 and the fixing plate 31 .

[0071] The limiting plate 14 is disposed in the supporting frame 13 . The limiting plate 14 extends along the first direction X. One side of the limiting plate 14 facing the buffer mechanism 3 abuts against the buffer plate 32 .

[0072] In the present application, the adjustment mechanism 2 is arranged on the base plate 12, and the adjustment mechanism 2 is a hydraulic component 22. The hydraulic component 22 controls the lifting and lowering of the support part 21, and then controls the lifting and lowering of the buffer plate 32. The limit plate 14 is fixedly arranged on the inner side of the support frame 13. The limit plate 14 is arranged in the vertical direction, and the two limit plates 14 are arranged opposite to each other to limit the opposite sides of the buffer plate 32, so as to ensure the stability of the buffer plate 32 when it is lifted and lowered, and then ensure that the buffer plate 32 always remains parallel to the fixed plate 31, and ensure the stability of the elastic component 34 structure between the fixed plate 31 and the buffer plate 32, so as to ensure the accuracy of the stiffness of the elastic component 34.

[0073] Specifically, rubber is provided on one side of the limiting plate 14 facing the buffer plate 32 . The rubber is in close contact with the buffer plate 32 , which can provide a better limiting function and alleviate the transmission of vibration, thereby further improving the buffering effect.

[0074] like Figure 8 As shown, in some embodiments, the support frame 13 includes a frame 131 and a support rod 132 arranged on the frame 131, the frame 131 is connected to the fixing plate 31, the support rod 132 is connected to the support member 11, and a damping ring 133 is arranged on the outer side of the support rod 132, and the damping ring 133 abuts against the support member 11 and / or the frame 131.

[0075] In the present application, the frame 131 is connected to the fixed plate 31 to fix the fixed plate 31. The two ends of the support member 11 are connected to the support member 11 and the frame 131 to form a fixed rigidity support part. Part of the vibration of the unit is transmitted to the frame 131 through the support member 11 and the support rod 132, and the other part is transmitted to the elastic component 34 through the support member 11 and the fixed column 33.

[0076] Specifically, the damping ring 133 is sleeved on the outer circumference of the support rod 132 and is located at both ends of the support rod 132. When the vibration of the unit is transmitted through the support rod 132, the damping ring 133 can effectively reduce the vibration, further improving the shock absorption efficiency of the shock absorbing device.

[0077] In some embodiments, a fixing column 33 is disposed on the fixing plate 31 , and the fixing plate 31 is connected to the support member 11 via the fixing column 33 .

[0078] In the present application, the fixed column 33 is located between multiple support rods 132, and the diameter of the fixed column 33 is larger than the diameter of the support rod 132. A small part of the vibration of the unit is transmitted to the frame through the support rod 132, and most of it is transmitted to the elastic component 34 through the fixed column 33. The elastic component 34 changes its own stiffness to adjust the stiffness of the entire shock-absorbing device, thereby improving the shock-absorbing effect on the unit.

[0079] In some embodiments, the buffer mechanism 3 also includes a variable damper 35, which is disposed on the fixed plate 31 or the buffer plate 32. The variable damper 35 is electrically connected to the control mechanism 4 and can adjust its own damping characteristics according to a signal output by the control mechanism 4.

[0080] In the present application, the control mechanism 4 obtains the vibration information of the unit, and outputs a control signal to the variable damper 35 according to the established control algorithm, thereby changing the damping characteristics of the variable damper 35, thereby changing the damping of the shock absorbing device, and cooperating with the adjustment mechanism 2 to change the stiffness of the shock absorbing device, which can further improve the adjustment effect of the fixed frequency of the shock absorbing device, thereby improving the shock absorbing effect of the unit.

[0081] In some embodiments, the variable damper 35 includes: a box body 351, in which an electric variable fluid is contained; a wire 352, which is wound around the box body 351; and a spring column 353, one end of which extends into the box body 351 and can move along the first direction X, and the other end is connected to the elastic component 34; wherein the electric variable fluid can change its own viscosity as the current in the wire 352 changes.

[0082] In the present application, the electric variable fluid is an intelligent material, which is a low-viscosity liquid in the absence of an external current. When an external current is provided in the conductor 352, the viscosity of the electric variable fluid changes and is converted into a solid state. One end of the spring column 353 is connected to the electric variable fluid, and the other end is connected to the second connecting member 343, thereby changing the overall damping force and supporting the second connecting member 343, so that the second connecting member 343 is stably located between the fixed plate 31 and the buffer plate 32 and can only move in the vertical direction, further improving the stability of the elastic component 34 structure.

[0083] Specifically, the variable damper 35 also includes a current control module 354, which is electrically connected to the controller 42. The current control module 354 can control the magnitude of the current in the wire 352, thereby adjusting the damping characteristics of the variable damper 35 to achieve continuous variable damping and achieve the variable damping function of the shock absorbing device.

[0084] In some embodiments, the control mechanism 4 includes a vibration sensor 41 disposed on the support mechanism 1 and a controller 42 electrically connected to the vibration sensor 41 , the vibration sensor 41 is used to detect vibration information of the unit, and the controller 42 is electrically connected to the adjustment mechanism 2 .

[0085] In the present application, the vibration information of the unit is detected by the vibration sensor 41, and the vibration information is transmitted to the controller 42. The controller 42 outputs a control signal according to a formulated algorithm to control the adjustment mechanism 2 or the variable damper 35 to work.

[0086] Specifically, the vibration sensor 41 includes a first vibration sensor 41 and a second vibration sensor 41, which are respectively arranged on the support member 11 and the bottom plate 12, and are both acceleration sensors, which can efficiently collect vibration acceleration signals on the support member 11 and the bottom plate 12, and transmit the monitored vibration signals to the controller 42 in a wired or wireless manner. The first vibration sensor 41 mainly collects the vibration signal of the unit, and the second vibration sensor 41 mainly collects the vibration signal after shock absorption, which plays a feedback role and can further improve the shock absorption effect of the unit.

[0087] The shock absorbing device detects the vibration information of the unit through the vibration sensor 41, and sends the vibration information of the unit to the controller 42. The controller 42 controls the support part 21 of the adjustment mechanism 2 to extend and retract along the first direction X according to the vibration information of the unit. The support part 21 changes the length of the buffer mechanism 3 in the first direction X, and changes its own elasticity through the change of the length of the buffer mechanism 3 in the first direction X, thereby changing the natural frequency of the buffer mechanism 3 itself, and can adjust its own fixed frequency according to the vibration frequency generated by the unit, thereby realizing broadband shock absorption of the unit and improving the shock absorption effect.

[0088] The principle of the vibration reduction device can be regarded as a linear spring-mass-damper system. The linear vibration isolation theory shows that a linear spring-mass-damper vibration isolator with a mass of m and a stiffness of k can effectively isolate harmonic vibrations with a frequency greater than 2 times the natural frequency. This shows that the lower the system stiffness and the lower the starting vibration isolation frequency, the wider the isolation range, and its vibration isolation rate can be expressed by the following formula:

[0089]

[0090] Where: TR is the system vibration isolation rate; ω n is the excitation frequency; ω is the fixed frequency of the shock absorber; ξ is the damping ratio of the shock absorber; the vibration isolation rate of different damping ratios is as follows Fig.12As shown, the frequency and excitation ratio of the shock absorber must be greater than 1.414, the entire shock absorber will have better performance, but it should not be too large, generally 2.5 to 4.5. Increased damping will reduce the vibration isolation effect, but damping still needs to be set, and the general damping ratio is 0.05 to 0.2. When the controller 42 detects the vibration signal of the unit compressor or unit, it processes the collected vibration monitoring signal to analyze and identify the state of the shock absorber system, and at the same time selects a suitable control algorithm such as LQG, sliding mode control, fuzzy control, etc. According to the identified state of the shock absorber system and the monitoring signal collected by the acceleration sensor, the optimal stiffness value and the optimal damping ratio are calculated in real time, so as to effectively reduce the broadband vibration of the variable frequency unit.

[0091] Reference Fig.11 As shown, the hydraulic assembly 22 includes a first hydraulic rod 221, a second hydraulic rod 222 and a main hydraulic rod 223. In this state, the first hydraulic rod 221, the main hydraulic rod 223 and the second hydraulic rod 222 move downward by ΔLmm, so that the variable-rigidity spring 344, the central leaf spring 3411 of the first elastic assembly 34 and the arc leaf spring 3412 jointly increase the stiffness. At this time, the stiffness of the vibration reduction device is increased from the original basic stiffness K 1 On the top, add an equivalent variable stiffness K m At this time, the structural damping changes the damping characteristics of the electric variable fluid in the box body 351 by changing the current in the wire 352, thereby changing the overall stiffness and damping of the vibration reduction device.

[0092] An embodiment of the present application provides a frequency conversion device, including: a machine set; and the above-mentioned shock absorbing device.

[0093] The unit in the present application is a variable frequency unit, which can be a compressor unit, a variable frequency air conditioning unit, etc. The support 11 of the shock absorbing device is connected to the foot or base of the unit, and the bottom of the shock absorbing device is the installation floor or the base of the unit. There are multiple shock absorbing devices, which are used to support the bottom of the unit to prevent the vibration of the unit from being transmitted downward, and can also support the side of the unit to prevent the vibration of the unit from being transmitted horizontally. By adopting the shock absorbing device in the present application, the variable frequency equipment can adjust the stiffness and damping of the shock absorbing device according to the vibration frequency of the unit, thereby changing the natural frequency of the shock absorbing device, realizing broadband shock absorption of the unit, and improving the shock absorption effect.

[0094] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0095] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0096] The above is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A shock absorbing device, characterized in that: include: A support mechanism (1), the support mechanism (1) comprising a support member (11) for supporting the unit; An adjustment mechanism (2) is arranged on the support mechanism (1), and the adjustment mechanism (2) has a support portion (21) that is telescopic along a first direction; A buffer mechanism (3) is arranged on the support portion (21) of the adjustment mechanism (2), one end of the buffer mechanism (3) away from the buffer mechanism (3) is connected to the support member (11), and the elasticity of the buffer mechanism (3) along the first direction changes as its length along the first direction changes; as well as The control mechanism (4) is used to obtain the vibration information of the machine set and control the operation of the regulating mechanism (2) according to the vibration information of the machine set.

2. The shock absorbing device according to claim 1, characterized in that: The buffer mechanism (3) comprises: a fixing plate (31) and a buffer plate (32) arranged at intervals along the first direction, the fixing plate (31) being connected to the supporting mechanism (1), the fixing plate (31) being connected to the supporting member (11), and the buffer plate (32) being connected to the supporting portion (21) of the adjusting mechanism (2); and An elastic component (34), wherein two ends of the elastic component (34) along the first direction are respectively connected to the fixing plate (31) and the buffer plate (32).

3. The shock absorbing device according to claim 2, characterized in that: The elastic component (34) includes a plurality of first elastic members (341), and the plurality of first elastic members (341) are arranged to form a frame-type structure. The first elastic member (341) includes a central plate spring (3411) and an arc-shaped plate spring (3412) arranged at both ends of the central plate spring (3411), and the two ends of the arc-shaped plate spring (3412) are respectively connected to the fixed plate (31) and the buffer plate (32).

4. The shock absorbing device according to claim 3, characterized in that: The elastic component (34) further comprises a first connecting member (342) arranged on the fixing plate (31) and the buffer plate (32), the end of the arc-shaped leaf spring (3412) being connected to the first connecting member (342), and the ends of two adjacent arc-shaped leaf springs (3412) being connected via the first connecting member (342).

5. The shock absorbing device according to claim 4, characterized in that: The elastic component (34) further comprises: A second connecting member (343) is located between the fixing plate (31) and the buffer plate (32); and A plurality of variable rigidity springs (344), one end of each of the plurality of variable rigidity springs (344) is connected to the second connecting member (343), and the other end of each of the plurality of variable rigidity springs (344) is respectively connected to the plurality of first connecting members (342).

6. The shock absorbing device according to claim 2, characterized in that: The support mechanism (1) further comprises: Bottom plate (12); A support frame (13) is arranged on the bottom plate (12), and the support frame (13) is connected to the support member (11) and the fixing plate (31); and A limit plate (14) is arranged in the support frame (13), the limit plate (14) extends along the first direction, and one side of the limit plate (14) facing the buffer mechanism (3) abuts against the buffer plate (32).

7. The shock absorbing device according to claim 6, characterized in that: The support frame (13) comprises a frame (131) and a support rod (132) arranged on the frame (131); the frame (131) is connected to the fixing plate (31); the support rod (132) is connected to the support member (11); a damping ring (133) is arranged on the outer side of the support rod (132); the damping ring abuts against the support member (11) and / or the frame (131).

8. The shock absorbing device according to claim 7, characterized in that: A fixing column (33) is provided on the fixing plate (31), and the fixing plate (31) is connected to the support member (11) via the fixing column (33).

9. The shock absorbing device according to claim 2, characterized in that: The buffer mechanism (3) further comprises a variable damper (35), wherein the variable damper (35) is arranged on the fixed plate (31) or the buffer plate (32), and the variable damper (35) is electrically connected to the control mechanism (4) and can adjust its own damping characteristics according to a signal output by the control mechanism (4).

10. The shock absorbing device according to claim 9, characterized in that: The variable damper (35) comprises: A box body (351), wherein the box body (351) contains an electric variable fluid; A wire (352) is wound around the box body (351); and A spring column (353), one end of which extends into the box body (351) and can move along the first direction, and the other end of which is connected to the elastic component (34); The electro-variable fluid can change its viscosity as the current in the conductor (352) changes.

11. The shock absorbing device according to claim 10, characterized in that: The variable damper (35) further comprises a current control module (354), wherein the current control module (354) is electrically connected to the control mechanism (4), and the current control module (354) is used to control the magnitude of the current in the wire (352).

12. The shock absorbing device according to claim 1, characterized in that: The control mechanism (4) comprises a vibration sensor (41) arranged on the support mechanism (1) and a controller (42) electrically connected to the vibration sensor (41), wherein the vibration sensor (41) is used to detect vibration information of the machine set.

13. A frequency conversion device, characterized in that: include: unit; as well as A shock absorbing device as claimed in any one of claims 1 to 12.

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