CN110567054A - Vibration adjusting assembly, compressor vibration reducing structure and air conditioner - Google Patents
Vibration adjusting assembly, compressor vibration reducing structure and air conditioner Download PDFInfo
- Publication number
- CN110567054A CN110567054A CN201910825321.8A CN201910825321A CN110567054A CN 110567054 A CN110567054 A CN 110567054A CN 201910825321 A CN201910825321 A CN 201910825321A CN 110567054 A CN110567054 A CN 110567054A
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- piezoelectric
- vibration
- periodic structure
- compressor
- vibration damping
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/0027—Pulsation and noise damping means
- F04B39/0044—Pulsation and noise damping means with vibration damping supports
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/08—Compressors specially adapted for separate outdoor units
- F24F1/12—Vibration or noise prevention thereof
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Vibration Prevention Devices (AREA)
- Compressor (AREA)
Abstract
The invention provides a vibration adjusting assembly, a compressor vibration reducing structure and an air conditioner. The vibration adjusting assembly comprises a piezoelectric periodic structure, wherein the piezoelectric periodic structure comprises a plurality of piezoelectric units, and the piezoelectric units are arranged in a ring shape and are sequentially sleeved to form the piezoelectric periodic structure; the vibration adjusting component can adjust the vibration reduction frequency range of the piezoelectric periodic structure in the radial direction. By utilizing the mutual conversion characteristic of mechanical energy and electric energy of the piezoelectric periodic structure and the adjustability of an external circuit, the range of the vibration frequency transmitted in the radial direction through the piezoelectric periodic structure can be enhanced or weakened, and the weakening purpose of comprehensively regulating and controlling various vibration frequencies is realized.
Description
Technical Field
The invention belongs to the technical field of compressor vibration reduction, and particularly relates to a vibration adjusting assembly, a compressor vibration reduction structure and an air conditioner.
Background
Vibration of a compressor in an existing air conditioner is always an industry pain point and difficulty problem, the vibration of the compressor can be transmitted to an air conditioner pipeline, alternating stress is caused on the air conditioner pipeline, therefore, the pipeline fails to work effectively due to fatigue fracture and the like, the service life of the air conditioner is shortened, vibration noise can be generated due to the vibration of the compressor, and user experience is seriously influenced.
Most of the processing modes for the vibration of the compressor utilize the viscoelastic performance of a rubber foot pad to damp, but the damping performance of rubber is limited and depends heavily on the hardness of the rubber, and when the hardness of the rubber is too high, the frequency of a damping band is too high, so that the damping effect, particularly the low-frequency damping effect, is difficult to play; when the hardness is lower, although the vibration reduction frequency band range is reduced, the rubber is too soft, so that the compressor can greatly shake in operation, and the vibration of a pipeline and the stress on the pipeline are increased. In addition, the vibration of the compressor changes along with the change of working conditions and the change of operation time, and the vibration damping range of the rubber foot pad is fixed, so that the vibration damping performance of the rubber foot pad is lack of adaptability.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to provide a vibration adjusting assembly, a compressor vibration damping structure and an air conditioner, which can adjust the vibration damping frequency range in all directions and adapt to the change of vibration working conditions.
In order to solve the above problems, the present invention provides a vibration-adjusting assembly, which includes a piezoelectric periodic structure, wherein the piezoelectric periodic structure includes a plurality of piezoelectric units, and the piezoelectric units are arranged in a ring shape and sequentially sleeved to form the piezoelectric periodic structure; the vibration adjusting component can adjust the vibration reduction frequency range of the piezoelectric periodic structure in the radial direction.
Preferably, the piezoelectric rings in the piezoelectric unit are formed by fixedly connecting two layers in an axial direction in an overlapping manner.
Preferably, the vibration adjusting assembly further comprises a vibration damping capacity adjusting component, and the vibration damping capacity adjusting component is fixedly sleeved in the piezoelectric periodic structure.
Preferably, the external circuit in the piezoelectric unit includes an inductor and a resistor, and all the external circuits are connected in series or in parallel.
Preferably, when the piezoelectric rings are formed by fixedly connecting two layers in an axial direction in an overlapping manner, the radial widths of the inductors, the resistors and the piezoelectric rings in the piezoelectric units are all correspondingly equal, and the vibration adjusting assembly forms a plurality of dispersed band gaps; the number of the band gaps is equal to the number of the piezoelectric units.
Preferably, the radial widths of the piezoelectric units are equal, the radial widths of the piezoelectric rings are equal, and the inductance isWhen the frequency modulation component is used, the synthesized band gap is formed by the frequency modulation component; wherein n at the upper right corner represents the nth piezoelectric element, L0Equal to the inductance, R, of the outermost piezoelectric element0Is the radius of the hollow circle of the innermost piezoelectric unit, a is the radial width of each piezoelectric unit, a1The difference between the piezoelectric units and the piezoelectric ring is shown, and N is the total number of the piezoelectric units.
According to another aspect of the invention, a vibration damping structure of a compressor is provided, which comprises the vibration regulating assembly.
Preferably, when the vibration adjusting assembly includes a vibration damping capacity adjustment member, the compressor is fixed to the vibration damping capacity adjustment member.
Preferably, the compressor vibration damping structure further includes a foot pad provided between the compressor and the vibration damping capacity adjustment part.
According to still another aspect of the present invention, there is provided an air conditioner including the vibration adjusting assembly as described above or the compressor vibration damping structure as described above.
The invention provides a vibration-adjusting component which comprises a piezoelectric periodic structure, wherein the piezoelectric periodic structure comprises a plurality of piezoelectric units, and the piezoelectric units are arranged in a ring shape and are sequentially sleeved to form the piezoelectric periodic structure; the vibration adjusting component can adjust the vibration reduction frequency range of the piezoelectric periodic structure in the radial direction. By utilizing the mutual conversion characteristic of mechanical energy and electric energy of the piezoelectric periodic structure and the adjustability of an external circuit, the range of the vibration frequency transmitted in the radial direction through the piezoelectric periodic structure can be enhanced or weakened, and the weakening purpose of comprehensively regulating and controlling various vibration frequencies is realized.
Drawings
FIG. 1 is a schematic structural diagram of a vibration control assembly according to an embodiment of the present invention;
FIG. 2 is a top view of a vibration tuning assembly according to an embodiment of the present invention;
FIG. 3 is an installation view of a vibration reduction structure of a compressor according to an embodiment of the present invention;
Fig. 4 is a schematic diagram of a damping bandgap of a vibration damping component according to an embodiment of the present invention.
The reference numerals are represented as:
1. A piezoelectric unit; 2. a piezoelectric ring; 3. a metal ring; 4. a damping capacity adjusting member; 5. an electrode; 6. an external circuit; 7. a compressor; 8. a foot pad; 9. and (5) mounting a chassis.
Detailed Description
Referring to fig. 1 to 4 in combination, according to an embodiment of the present invention, a vibration-tuning assembly includes a piezoelectric periodic structure, where the piezoelectric periodic structure includes a plurality of piezoelectric units 1, and the piezoelectric units 1 are annular and are sequentially sleeved to form the piezoelectric periodic structure; the vibration adjusting component can adjust the vibration reduction frequency range of the piezoelectric periodic structure in the radial direction.
The piezoelectric unit 1 comprises a metal ring 3, a piezoelectric ring 2, an electrode 5 and an external circuit 6, wherein the metal ring 3 and the piezoelectric ring 2 are fixed into an integral structure; two electrodes 5 are arranged, one is fixed at one end of the piezoelectric ring 2, the other is fixed at the other end of the piezoelectric ring 2, and the two electrodes 5 are electrically connected with the external circuit 6. The piezoelectric units 1 are sequentially sleeved to form a piezoelectric periodic structure, and the metal ring 3 and the piezoelectric ring 2 are fixed together by welding.
The vibration source is arranged in or outside the ring of the piezoelectric periodic structure, and when vibration is transmitted through the piezoelectric units 1, the external circuit 6 can be adjusted to enable each piezoelectric unit 1 to generate a vibration frequency band, and the vibration is amplified or weakened. Or, if the compressor 7 is fixed in the ring, when the vibration of the compressor 7 is transmitted from the piezoelectric periodic structure to the outer ring, the vibration is transmitted to the piezoelectric ring 2, and since the piezoelectric ring 2 is electrically connected with the external circuit 6, the transmitted mechanical energy such as vibration is converted, and the mechanical vibration energy is consumed, so that the vibration is weakened.
The piezoelectric unit 1 has a ring structure, and can ensure that vibration is attenuated in all directions and cannot be diffused all around.
The piezoelectric ring 2 is formed by fixedly connecting two layers in an axial direction in an overlapping manner, and the two layers of structures enable the piezoelectric ring 2 to form a capacitor, so that corresponding electric energy can be stored, and the vibration reduction capability can be improved; and the external circuit 6 is electrically connected with the piezoelectric ring 2, and the external circuit 6 comprises an inductor and a resistor.
In the case where the inductance, resistance and radial width of the piezoelectric rings 2 of each piezoelectric unit 1 are correspondingly equal, the tuning assembly can generate a distributed band gap, as shown in fig. 4, with a frequency ofWherein the superscript (n) denotes the nth piezo-element 1, L(n)As the inductance of each of the piezoelectric units 1,Is the equivalent capacitance of each piezoelectric unit 1. Through the frequency range of the band gap, when the frequency point with larger vibration of the vibrating piece falls within the range of the vibration reduction band, the vibration reduction effect can be well achieved; as shown in fig. 4, the vibration damping band is a range in which the transmission coefficient of the ordinate is less than zero.
The bearing part further comprises a damping capacity adjusting part 4, the damping capacity adjusting part 4 is fixedly sleeved in the piezoelectric periodic structure, and the fixing comprises welding, so that the damping capacity adjusting part 4 and the piezoelectric periodic structure are not easy to fall off in vibration. By varying the mass of the damping capacity adjustment member 4, the damping capacity of the damping assembly can be adjusted, e.g. when the damping capacity adjustment member 4 has a mass m0the larger the damping capacity, the more energy that can be transmitted to the damping structure is consumed.
In addition, the piezoelectric rings 2 of the respective piezoelectric units 1 have the same radial width, the metal rings 3 have the same radial width, and the inductance isWhen it is, then adjustThe vibrating element is capable of generating a resultant bandgap as shown in fig. 4, wherein the n-th piezoelectric element 1 is denoted by the symbol L, and L0equal to the inductance, R, of the outermost piezoelectric element 10The radius of the innermost damping capacity adjustment member 4, a being the total radial width of the piezoelectric unit 1, a1Is the radial width of the metal ring 3, and N is the total number of piezoelectric units 1.
for the use of different band gaps, if a narrower damping range is concerned, a synthetic band gap can be designed; if the tuning component has a plurality of damping frequency bands, the dispersion band gaps can be designed, and different numbers of dispersion band gaps can be obtained by different numbers of piezoelectric units 1.
In the whole vibration-adjusting component, all the external circuits 6 are connected in series or in parallel, and an electromagnetic resonator can be formed by a shunt circuit formed by the piezoelectric ring 2 and the external circuits 6, and the resonant frequency of the electromagnetic resonator can be achieved by adjusting the size of the inductor and the resistor.
The frequency of a damping band (comprising a dispersed band gap and a synthesized band gap) can be adjusted by adjusting the size of the inductor, and when the inductor is increased, the frequency of the band gap is reduced; the damping capacity can be adjusted by adjusting the resistance R in the shunt circuit, and when R is smaller, the damping component can convert more mechanical energy into electric energy and consume the electric energy, so that the damping capacity is better.
By adjusting the radial width a of the piezoelectric ring 22To adjust the frequency of the damping band (including both the dispersive and the composite band gap), i.e. a2The larger the equivalent capacitance of the piezoelectric ring 2The larger, by frequency formulaIt can be seen that the lower the frequency of the damping band (including the dispersive bandgap and the composite bandgap).
According to an embodiment of the invention, the vibration reduction structure of the compressor comprises the vibration adjusting assembly.
when the vibration damping unit includes the vibration damping capacity adjustment member 4, the compressor 7 is fixed to the vibration damping capacity adjustment member 4. The compressor vibration damping structure further includes a foot pad 8, and the foot pad 8 is provided between the compressor 7 and the vibration damping capacity adjustment part 4.
According to still another embodiment of the present invention, an air conditioner includes the vibration control assembly as described above or the compressor vibration damping structure as described above. The vibration adjusting component or the compressor vibration reducing structure is arranged on a mounting base plate 9 of the air conditioner.
Because the vibration adjusting component has a plurality of vibration reduction frequency bands, and the frequency band has the adjustability, when the frequency of compressor 7 vibration is in this within range, can effectively reduce compressor 7's vibration to reduce the vibration that transmits on the pipeline, the stress level on the greatly reduced pipeline, thereby improve the vibration noise problem of air conditioner, promote the quality and the user experience of air conditioner.
It is easily understood by those skilled in the art that the above embodiments can be freely combined and superimposed without conflict.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention. The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The vibration-adjusting assembly is characterized by comprising a piezoelectric periodic structure, wherein the piezoelectric periodic structure comprises a plurality of piezoelectric units (1), the piezoelectric units (1) are arranged in an annular shape, and the piezoelectric units are sequentially sleeved to form the piezoelectric periodic structure; the vibration adjusting component can adjust the vibration reduction frequency range of the piezoelectric periodic structure in the radial direction.
2. The vibration-damping assembly according to claim 1, wherein the piezoelectric ring (2) of the piezoelectric unit (1) is fixedly connected by two layers in an axial direction.
3. The vibration damping assembly according to claim 1 or 2, further comprising a vibration damping capacity adjusting member (4), wherein the vibration damping capacity adjusting member (4) is fixedly sleeved in the piezoelectric periodic structure.
4. A tuning assembly according to claim 3, wherein the external circuits (6) in the piezo-element (1) comprise an inductance and a resistance, all the external circuits (6) being connected in series or in parallel.
5. The vibration-control assembly according to claim 4, wherein when the piezoelectric ring (2) is formed by fixedly connecting two layers in an axial direction in an overlapping manner, the inductance, the resistance and the radial width of the piezoelectric ring (2) in the piezoelectric unit (1) are correspondingly equal, and the vibration-control assembly forms a plurality of dispersed band gaps; the number of the band gaps is equal to the number of the piezoelectric units (1).
6. A tuning assembly according to claim 4 wherein the piezoelectric rings (2) are of equal radial width and the inductance is such that the piezoelectric units (1) are of equal radial width and the piezoelectric rings (2) are of equal radial widthWhen the frequency modulation component is used, the synthesized band gap is formed by the frequency modulation component; wherein n at the upper right corner represents the nth piezoelectric unit (1), L0Equal to the inductance, R, of the outermost piezoelectric element (1)0Is the radius of the hollow circle of the innermost piezoelectric periodic structure, a is the radial width of each piezoelectric unit (1), a1Is the difference value between the piezoelectric unit (1) and the piezoelectric ring (2), and N is the total number of the piezoelectric units (1).
7. A vibration damping structure for a compressor, comprising the vibration control assembly according to any one of claims 1 to 6.
8. Vibration damping arrangement for a compressor according to claim 7, characterized in that when the vibration damping unit comprises a vibration damping capacity adjustment member (4), the compressor (7) is fixed to the vibration damping capacity adjustment member (4).
9. Compressor vibration damping structure according to claim 8, characterized in that it further comprises a foot pad (8), said foot pad (8) being provided between said compressor (7) and said vibration damping capacity adjustment member (4).
10. An air conditioner characterized by comprising a vibration adjusting assembly as set forth in any one of claims 1 to 6 or a vibration reducing structure of a compressor as set forth in any one of claims 7 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910825321.8A CN110567054B (en) | 2019-09-02 | 2019-09-02 | Vibration adjusting assembly, compressor vibration reducing structure and air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910825321.8A CN110567054B (en) | 2019-09-02 | 2019-09-02 | Vibration adjusting assembly, compressor vibration reducing structure and air conditioner |
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| Publication Number | Publication Date |
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| CN110567054A true CN110567054A (en) | 2019-12-13 |
| CN110567054B CN110567054B (en) | 2020-09-22 |
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| CN201910825321.8A Active CN110567054B (en) | 2019-09-02 | 2019-09-02 | Vibration adjusting assembly, compressor vibration reducing structure and air conditioner |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07293553A (en) * | 1994-04-21 | 1995-11-07 | Ebara Corp | Tilting pad type bearing |
| CN102338187A (en) * | 2011-08-23 | 2012-02-01 | 北京空间机电研究所 | Satellite-borne damping variable shock absorber |
| CN104564798A (en) * | 2013-10-14 | 2015-04-29 | 航空技术空间股份有限公司 | Piezoelectric damper system for an axial turbomachine rotor |
| CN105443635A (en) * | 2016-01-07 | 2016-03-30 | 南昌航空大学 | Frequency adjustable stair beam type dynamic vibration absorber based on piezoelectric feedback control |
| CN108119603A (en) * | 2017-12-07 | 2018-06-05 | 南京航空航天大学 | A kind of vibration damping loop device based on piezo-electric stack |
| CN109538683A (en) * | 2018-12-11 | 2019-03-29 | 南京航空航天大学 | The damping ring stacked based on annular piezoelectric |
-
2019
- 2019-09-02 CN CN201910825321.8A patent/CN110567054B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07293553A (en) * | 1994-04-21 | 1995-11-07 | Ebara Corp | Tilting pad type bearing |
| CN102338187A (en) * | 2011-08-23 | 2012-02-01 | 北京空间机电研究所 | Satellite-borne damping variable shock absorber |
| CN104564798A (en) * | 2013-10-14 | 2015-04-29 | 航空技术空间股份有限公司 | Piezoelectric damper system for an axial turbomachine rotor |
| CN105443635A (en) * | 2016-01-07 | 2016-03-30 | 南昌航空大学 | Frequency adjustable stair beam type dynamic vibration absorber based on piezoelectric feedback control |
| CN108119603A (en) * | 2017-12-07 | 2018-06-05 | 南京航空航天大学 | A kind of vibration damping loop device based on piezo-electric stack |
| CN109538683A (en) * | 2018-12-11 | 2019-03-29 | 南京航空航天大学 | The damping ring stacked based on annular piezoelectric |
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| CN110567054B (en) | 2020-09-22 |
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