CN203516223U - Micro-circular-seam liquid film noise reduction device of centrifugal compressor - Google Patents
Micro-circular-seam liquid film noise reduction device of centrifugal compressor Download PDFInfo
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- CN203516223U CN203516223U CN201320554760.8U CN201320554760U CN203516223U CN 203516223 U CN203516223 U CN 203516223U CN 201320554760 U CN201320554760 U CN 201320554760U CN 203516223 U CN203516223 U CN 203516223U
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Abstract
The utility model relates to the technology of air conditioning compressors, in particular to a device for lowering fluid dynamic noise in operation of a compressor. The micro-circular-seam liquid film noise reduction device of the centrifugal compressor comprises an impeller (1), a volute (11) and a pressure expander (10), wherein an exhaust runner (2) is formed between the volute (11) and the pressure expander (10) in a separated mode; a volute chamber runner (3) is arranged inside the volute (11) and is communicated with the exhaust runner (2); the outer side of the impeller (1) is provided with a circular annular liquid storage baffle (4); a micro-circular-seam connection board (9) is arranged inside the liquid storage baffle (4); a micro-circular-seam runner is formed between the liquid storage baffle (4) and the micro-circular-seam connection board (9). Due to the fact that liquid refrigerant forms a layer of flowing liquid film in the runners under the action of the self viscosity and the surface tension, the liquid film can effectively separate and absorb the noise, and the noise is prevented from being spread.
Description
Technical field
The utility model relates to a kind of air conditioner compressed machine technology, relates in particular to a kind of device to hydrokinetics noise noise reduction in compressor operation.
Background technique
At present, along with social development, all trades and professions constantly increase the demand of air-conditioning unit, the demand of especially big-and-middle-sized central air-conditioner unit rises year by year, and big-and-middle-sized central air-conditioner unit is when operation, sound is larger, more than sound pressure level even reaches 100dB, its frequency of sound wave is in 2000Hz～6000Hz scope, belong to medium-high frequency sound wave, overlapping to sensitive area 2000Hz～4000Hz scope of frequency of sound wave with people's ear, human body is very easily damaged, belong to a kind of serious noise pollution, have a strong impact on its around physical and mental health and working environment of personnel.
Main Noise Sources during air-conditioning unit operation is mechanical noise, hydrokinetics noise and the electro permanent magnetic noise of centrifugal compressor.
Mechanical noise is affected by the friction of mechanical part, lubricated, machining accuracy etc., and some noises cannot be avoided.
Hydrokinetics noise, from the rotational noise and the eddy current crack that interact and produce in process fluid flow, can reduce noise by changing some parameter (as pressure, temperature, speed etc.) of fluid in flow process.
Electro permanent magnetic noise enters mainly due to running, the magnetic flux of motor the noise that the generation vibrations such as air gap are sent.Can significantly reduce noise by strengthening motor processing and assembly precision.
At present at compressor noise-reduction technical elements, mainly by two kinds of approach: the one, from compressor internal mechanism aspect, improve, the 2nd, improve compressor housing or install baffler and sound absorbing material additional in compressor outside.The improvement of carrying out from compressor inner structure mainly contains at compressor corollary system to be increased baffler or changes its natural frequency to compressor assembly counterweight (adding balancing weight, shockproof glue based), or change the related components surfacing of impeller final vacuum runner into sound-absorbing material, or compressor inlet and outlet are carried out to runner optimization, reduce gas flow resistance.
Prior art is mainly to reduce vibration between compressor and framework to reduce vibration of compressor noise, but hydrokinetics noise in compressor operation is not had to good noise reduction measure.
Model utility content
Technique effect of the present utility model can overcome above-mentioned defect, provides the micro-circumferential weld liquid film of a kind of centrifugal compressor denoising device, the hydrokinetics noise that it produces while effectively reducing air-conditioning unit operation.
For achieving the above object, the utility model adopts following technological scheme: it comprises impeller, volute, Diffuser, between volute and Diffuser, be partitioned into grate flow channel, in volute, be provided with volute chamber runner, volute chamber runner is communicated with grate flow channel, the outside of impeller is provided with ring liquid storage baffle plate, is provided with micro-circumferential weld connecting plate in liquid storage baffle plate, between liquid storage baffle plate and micro-circumferential weld connecting plate, is partitioned into micro-circumferential weld runner.
Principle of noise reduction of the present utility model is:
Sound wave can produce reflection and absorbing phenomenon when running into obstacle, and hard, smooth body surface has obvious reflecting action to sound, and body surface soft, coarse, porous has effective absorption.Micro-circumferential weld liquid film structure is mainly to have used the attenuation by absorption effect of object to sound wave.So-called attenuation by absorption, sound wave is when Propagation, and viscosity and heat conduction due to medium, in compression and expansion process, make a part of acoustic energy be converted into heat energy and consume.Generally speaking, the attenuation of acoustic energy square being directly proportional with sound wave frequency.
When centrifugal compressor moves, the Acoustic Wave Propagation of its generation is to liquid film, the phenomenons such as sound wave can reflect at liquid film critical surface, scattering, transmission.The Acoustic Wave Propagation producing when compressor is during to liquid film, because liquid film face is soft, coarse, at liquid film layer, there is reflection and scattering in the sound wave that those wavelength are short, frequency is higher, acoustic energy is absorbed in a large number in viscosity and the heat conduction of liquid film layer internal cause refrigerant medium, only has those wavelength sound wave long, that frequency is low by transmission, to pass liquid film more smoothly.The more sensitive high-frequency noises of people's ear that centrifugal compressor produces for this reason is significantly weakened, and can effectively reduce the injury of noise on human body.This liquid film is meeting degree of superheat impact and the part vaporization of exhaust fluid by compression in flow process, this liquid film also can be because of the indent medium-high frequency vibrational energy part vaporization of air-flow body of absorption pressure, saturated refrigerant gas after vaporization fully mixes in flow at high speed process with the refrigerant superheat gas that compressor impeller is discharged, effectively absorb the heat of exhaust fluid, reduce compressor exhaust temperature, thereby reduced the dynamics noise of fluid, mixed gas is flowed through grate flow channel, volute chamber runner, outlet pipe to condenser.
Micro-circumferential weld runner comprises liquid storage cylinder, and a side of liquid storage cylinder is communicated with grate flow channel by import, outlet successively, and the opposite side of liquid storage cylinder is communicated with condenser tube paths.
Import is vertical with exhaust passage to be arranged, and outlet-inclined impeller vane arranges in exhaust passage.
Angle between outlet and exhaust passage is 20 °-60 °.
Import is 1mm-3mm along the thickness of micro-circumferential weld runner, and micro-circumferential weld runner exit is 0.5mm-1.5mm along the thickness of micro-circumferential weld runner.
Micro-circumferential weld runner at least arranges one.
The beneficial effects of the utility model are:
1, because liquid refrigerant forms the mobile liquid film of one deck in himself viscosity of runner internal cause and capillary effect, this liquid film can effectively be isolated and absorption of noise, stops the sonic propagation of making an uproar.
2, the cryogenic high pressure liquid refrigerant providing due to condenser divides vaporization in the heat effect bottom of crossing of high-temperature high-pressure refrigerant gas after impeller compression, absorb compressor air-discharging fluid temperature (F.T.), thereby reduction delivery temperature, strengthen the condensing heat-exchange efficiency of postorder condenser, so micro-circumferential weld liquid film denoising structure can not affect the efficiency of air-conditioning unit.
3, because condenser side cryogenic high pressure liquid refrigerant has higher pressure energy, and the gaseous refrigerant at compressor impeller exhaust outlet place be speed can be higher, pressure energy is less, and this pressure energy is far below the pressure energy of condenser side liquid refrigerant, therefore the liquid refrigerant that condenser provides can, constantly to liquid storage cylinder feed flow in the situation that additionally providing power without the external world, guarantee the good operation of liquid film forming process.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is internal view of the present utility model;
Fig. 3 is the local enlarged diagram of micro-circumferential weld runner.
In figure: 1-impeller; 2-grate flow channel; 3-volute chamber runner; 4-liquid storage baffle plate; 5-outlet; 6-condenser tube paths; 7-liquid storage cylinder; 8-import; The micro-circumferential weld connecting plate of 9-; 10-Diffuser; 11-volute.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in detail:
The micro-circumferential weld liquid film of centrifugal compressor of the present utility model denoising device comprises impeller 1, volute 11, Diffuser 10, between volute 11 and Diffuser 10, be partitioned into grate flow channel 2, in volute 11, be provided with volute chamber runner 3, volute chamber runner 3 is communicated with grate flow channel 2, the outside of impeller 1 is provided with ring liquid storage baffle plate 4, in liquid storage baffle plate 4, be provided with micro-circumferential weld connecting plate 9, between liquid storage baffle plate 4 and micro-circumferential weld connecting plate 9, be partitioned into micro-circumferential weld runner.
Micro-circumferential weld runner comprises liquid storage cylinder 7, and a side of liquid storage cylinder 7 is communicated with grate flow channel 2 by import 8, outlet 5 successively, and the opposite side of liquid storage cylinder 7 is communicated with condenser tube paths 6.
The concrete use of this device is as follows: condenser cryogenic high pressure liquid refrigerant enters liquid storage cylinder 7 by connecting condenser tube paths 6, then by import 8, outlet 5, through pressure energy differential pressure intake and exhaust runner 2, wall forms liquid film within it, effectively fall from noise, liquid film flows along runner inner wall under the high velocity effect of fluid, in flow process, liquid film is partly vaporized by temperatures involved, refrigeration agent after vaporization fully mixes with the refrigerant gas of runner inside after impeller 1 compression, through Diffuser 10, flow into volute casing runner 3, through gas exhaust piping, enter condenser condenses again, so circulation.Connect condenser pipe channel setting regulating valve, can, by the regulation of valve, determine the size of liquid supply rate.
Claims (6)
1. the micro-circumferential weld liquid film of a centrifugal compressor denoising device, comprise impeller (1), volute (11), Diffuser (10), between volute (11) and Diffuser (10), be partitioned into grate flow channel (2), in volute (11), be provided with volute chamber runner (3), volute chamber runner (3) is communicated with grate flow channel (2), it is characterized in that, the outside of impeller (1) is provided with ring liquid storage baffle plate (4), in liquid storage baffle plate (4), be provided with micro-circumferential weld connecting plate (9), between liquid storage baffle plate (4) and micro-circumferential weld connecting plate (9), be partitioned into micro-circumferential weld runner.
2. the micro-circumferential weld liquid film of centrifugal compressor according to claim 1 denoising device, it is characterized in that, micro-circumferential weld runner comprises liquid storage cylinder (7), one side of liquid storage cylinder (7) is communicated with grate flow channel (2) by import (8), outlet (5) successively, and the opposite side of liquid storage cylinder (7) is communicated with condenser tube paths (6).
3. the micro-circumferential weld liquid film of centrifugal compressor according to claim 2 denoising device, is characterized in that, import (8) and exhaust passage (2) vertical setting, and outlet (5) favours exhaust passage (2) and arranges.
4. the micro-circumferential weld liquid film of centrifugal compressor according to claim 3 denoising device, is characterized in that, the angle between outlet (5) and exhaust passage (2) is 20 °-60 °.
5. the micro-circumferential weld liquid film of centrifugal compressor according to claim 3 denoising device, it is characterized in that, import (8) is 1mm-3mm along micro-circumferential weld runner thickness radially, and micro-circumferential weld runner exit (5) is 0.5mm-1.5mm along micro-circumferential weld runner thickness radially.
6. the micro-circumferential weld liquid film of centrifugal compressor according to claim 1 denoising device, is characterized in that, micro-circumferential weld runner at least arranges one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320554760.8U CN203516223U (en) | 2013-09-06 | 2013-09-06 | Micro-circular-seam liquid film noise reduction device of centrifugal compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320554760.8U CN203516223U (en) | 2013-09-06 | 2013-09-06 | Micro-circular-seam liquid film noise reduction device of centrifugal compressor |
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| Publication Number | Publication Date |
|---|---|
| CN203516223U true CN203516223U (en) | 2014-04-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320554760.8U Withdrawn - After Issue CN203516223U (en) | 2013-09-06 | 2013-09-06 | Micro-circular-seam liquid film noise reduction device of centrifugal compressor |
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| Country | Link |
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| CN (1) | CN203516223U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103498817A (en) * | 2013-09-06 | 2014-01-08 | 乐金空调(山东)有限公司 | Micro girth liquid film noise reduction device for centrifugal compressor |
-
2013
- 2013-09-06 CN CN201320554760.8U patent/CN203516223U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103498817A (en) * | 2013-09-06 | 2014-01-08 | 乐金空调(山东)有限公司 | Micro girth liquid film noise reduction device for centrifugal compressor |
| CN103498817B (en) * | 2013-09-06 | 2016-03-09 | 乐金空调(山东)有限公司 | Micro girth liquid film noise reduction device for centrifugal compressor |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140402 Effective date of abandoning: 20160309 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |