CN104832247A - Exhaust silencer for screw-type unit - Google Patents
Exhaust silencer for screw-type unit Download PDFInfo
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- CN104832247A CN104832247A CN201510214750.3A CN201510214750A CN104832247A CN 104832247 A CN104832247 A CN 104832247A CN 201510214750 A CN201510214750 A CN 201510214750A CN 104832247 A CN104832247 A CN 104832247A
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- pipe
- outlet pipe
- suction tude
- exhaust silencer
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Abstract
The invention relates to an exhaust silencer for a screw-type unit. The exhaust silencer comprises an air inlet pipe, a silencer housing and an air outlet pipe which are straightly communicated in sequence, wherein the silencer housing comprises a divergent type air inlet divergent pipe, a straight pipe and a reducing type air outlet reducing pipe; a plurality of partition boards are arranged in the air inlet divergent pipe at intervals, and through hole type air holes are formed in each partition board so that the air inlet divergent pipe forms a plurality of partition cavities communicated with the air outlet pipe; an inserting pipe is arranged on the air outlet pipe, and the end of the air outlet pipe is inserted in the cavity of the silencer in a suspended mode; oil return holes are formed in the pipe body at one end, close to the air outlet pipe, of the inserting pipe at intervals circumferentially. The exhaust silencer enables gas to be expanded gradually while obtaining wider silencing frequency band and higher silencing capacity, so that the pressure loss is effectively reduced. Therefore, the silencer is smaller in size under the precondition of guaranteeing the silencing capacity and the pressure loss.
Description
Technical field
The present invention relates to screw type cold water (heat pump) machine set system, be specifically related to a kind of exhaust silencer for screw type cold water (heat pump) unit.
Background technique
Screw type cold water (heat pump) unit ubiquity exhaust gas pressure pulse, these exhaust gas pulses become audible sound source in system, affect the noise and vibration of whole unit.The method of cutting down exhaust gas pulses is generally fix a silencer on exhaust outlet of compressor or exhaust duct, the reactive muffler of this silencing apparatus normally expander formula, its noise-cancelling theory is the sudden change utilizing internal diameter of the pipeline, sound wave is made to produce reflection and interfere, thus abatement is along the noise of pipe transmmision, but this silencing apparatus needs higher internal diameter of the pipeline divergence ratio, internal diameter divergence ratio is generally designed to 3 ~ 4 by engineering, and therefore this silencing apparatus is widely used in outlet pipe internal diameter in the chiller plant of below Φ 50mm.For screw type cold water (heat pump) unit of outlet pipe internal diameter more than Φ 50mm, usually expansion pipe silencer can not directly be applied, because this can make muffler volume too huge, affect size and the outward appearance of unit, more common method is that internal diameter of the pipeline is expanded certain proportion, then in expansion cavity, arranges perforate dividing plate, and sound deadening capacity and the diaphragm structure of this silencing apparatus are closely related, and certain pressure loss can be produced, affect unit performance.
Summary of the invention
The technical problem to be solved in the present invention is, a kind of exhaust silencer for screw type unit is provided, adopts less internal diameter of the pipeline divergence ratio, effectively reduce the exhaust gas pulses noise of screw type cold water (heat pump) unit, significantly reduce the pressure loss simultaneously, promote unit performance.
The technical solution adopted for the present invention to solve the technical problems is:
For an exhaust silencer for screw type unit, comprise suction tude, suppressor case, steam outlet pipe that straight line is in turn communicated with; It is characterized in that: suppressor case is made up of gradual-enlargement type air admission increaser, straight tube, tapering type reducing pipe of giving vent to anger by refrigerant flow direction; In air inlet increaser, interval arranges some dividing plates, and the inner peripheral surface of dividing plate outer peripheral surface and air inlet increaser is tightly connected, and described dividing plate is provided with through hole type pore and makes air inlet increaser form some separate spaces communicated with steam outlet pipe; Steam outlet pipe arranges interpolation pipe, and interpolation pipe is by with the unsettled insertion silencing apparatus cavity of steam outlet pipe joint; Interpolation pipe is provided with spill port near one end body circumference of steam outlet pipe is spaced apart; The gyration center of described suppressor case all overlaps with the gyration center of suction tude, steam outlet pipe.
Further, suction tude, steam outlet pipe are fixedly connected on suppressor case respectively, and joint seals.
Further, the internal diameter of described suction tude and steam outlet pipe is equal or not etc., the internal diameter ratio of suction tude and steam outlet pipe is not 0.6 ~ 1.
Further, the straight tube internal diameter of described suppressor case is larger than suction tude internal diameter, and suppressor case straight tube internal diameter and suction tude internal diameter ratio are 1.2 ~ 1.9.
Further, the ratio of described suppressor case total length and suction tude internal diameter is 1.5 ~ 6.
Further, described dividing plate all with suction tude central axis.
Further, the number of described dividing plate is 2 ~ 5.
Further, described separate space volume is different, and according to refrigerant flow direction, the volume of downstream separate space is greater than upstream separate space, and the volume ratio of the separate space that is connected is 1.01 ~ 2.5; Or the distance between described two pieces of connected dividing plates is 10mm ~ 200mm.
Further, when on dividing plate, pore is one, aperture is 0.5 ~ 1.8 times of suction tude internal diameter; Or when the pore quantity on single dividing plate is more than 1, the gross area of the pore on this single dividing plate is 0.25 ~ 3.25 times that suction tude cavity cross-section is amassed.
Further, interpolation pipe center line overlaps with muffler outlet piper center line.
Further, the degree of depth in described interpolation pipe insertion silencing apparatus cavity and the ratio of suppressor case total length are 0.1 ~ 0.7.
During use, on the relief opening this silencing apparatus being arranged on compressor in screw type cold water (heat pump) unit or the exhaust duct be connected with exhaust outlet of compressor, for reducing the noise of unit.The present invention compared with prior art has the following advantages: the multistage expansion chamber utilizing flaring volume, forms multiple sudden change acoustic interface in silencing apparatus inside, makes sound wave produce reflection and interfere, thus effectively reduces high-frequency noises; The Helmholtz's resonant cavity utilizing interpolation pipe to be formed reduces low-frequency noise.Because expansion chamber is flaring volume, wider deadening frequency band and the sound deadening capacity of Geng Gao can be obtained on the one hand, on the other hand, gas be expanded gradually, effectively reduces the pressure loss.Thus under the prerequisite ensureing sound deadening capacity and the pressure loss, make muffler volume less.The exhaust gas pulses noise of effective reduction screw type cold water (heat pump) unit, significantly reduces the pressure loss simultaneously, promotes unit performance.
Accompanying drawing explanation
Fig. 1 is cross-sectional configuration schematic diagram of the present invention;
Fig. 2 is Fig. 1 central diaphragm structural representation;
Fig. 3 is interpolation pipe structural representation in Fig. 1;
Fig. 4 is the mounting point schematic diagram of the present invention in screw type unit;
In all of the figs, identical reference character is used for representing identical element or structure, wherein:
1-suction tude, 1.1-suction tude cavity, 2-suppressor case, 2.1-air inlet increaser, 2.2-straight tube, 2.3-reducing pipe of giving vent to anger, 2.4-silencing apparatus cavity, 3-steam outlet pipe, 4-dividing plate; 4.1-the first dividing plate, 4.2-second partition, the 4.3-the three dividing plate, 4.1.1-the first separate space, 4.1.2-the second separate space, 5-pore, 6-interpolation pipe, 7-spill port, 8-compressor, 8.1-exhaust outlet of compressor, 8.2 compressor air suction mouths, 9-outlet pipe, 10-condenser, 11-throttle valve, 12-vaporizer.
Embodiment
In order to make object of the present invention, technological scheme and advantage clearly understand, below in conjunction with accompanying drawing and the power of enforcement, the present invention is further elaborated.Specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.In addition, if below in described each mode of execution of the present invention involved technical characteristics do not form conflict each other and just can be combined with each other.
The exhaust silencer for screw type unit as Figure 1-3, is made up of suction tude 1, suppressor case 2, steam outlet pipe 3, dividing plate 4, pore 5, interpolation pipe 6, spill port 7.Described suction tude 1 is connected with the two ends of suppressor case 2 respectively with steam outlet pipe 3, being communicated with of the suction tude 1 of above-mentioned indication, steam outlet pipe 3 and suppressor case 2 refers to suction tude 1 and steam outlet pipe 3 is fixedly connected on suppressor case 2 respectively, and joint seals.Be furnished with some dividing plates 4 in described suppressor case 2, the inner peripheral surface of this dividing plate 4 outer peripheral surface and suppressor case 2 is tightly connected, and suppressor case 2 is divided into some cavitys by dividing plate 4, and described dividing plate is provided with pore 5.Described suppressor case 2 internal placement has interpolation pipe 6, and this interpolation pipe 6 is fixed on muffler outlet piper 3, offers spill port 7 bottom interpolation pipe 6.
The internal diameter of described suction tude 1 is greater than 50mm, and the internal diameter of described steam outlet pipe 3 is more than or equal to suction tude 1 internal diameter, and wherein the ratio of suction tude internal diameter and steam outlet pipe internal diameter is 0.6 ~ 1.
Described suppressor case 2 is made up of air inlet increaser 2.1, straight tube 2.2, reducing pipe 2.3 of giving vent to anger, wherein air inlet increaser 2.1 is fixedly connected with suction tude 1, joint seals, reducing pipe 2.3 of giving vent to anger is fixedly connected with steam outlet pipe 3, joint seals, air inlet increaser 2.1 and give vent to anger reducing pipe 2.3 shape can be inconsistent.The internal diameter of straight tube 2.2 is larger than the internal diameter of suction tude 1, the ratio of straight tube 2.2 internal diameter and suction tude 1 internal diameter is 1.2 ~ 1.9, the total length of suppressor case 2 and the ratio of suction tude 1 internal diameter are 1.5 ~ 6, and in addition, the gyration center of suppressor case 2 overlaps with suction tude 1 gyration center.
In the present invention, described dividing plate 4 is fixed on air inlet increaser 2.1, in the present embodiment as Fig. 1, secure 3 pieces of dividing plate 4(and be respectively the first dividing plate 4.1, second partition 4.2, 3rd dividing plate 4.3), thus make to form two separate spaces between dividing plate and dividing plate, the first separate space 4.1.1 and the second separate space 4.2.2 respectively, wherein near suction tude 1 is the first separate space 4.1.1, but dividing plate number is not defined as 3 by the present invention, dividing plate number can be 2 ~ 5, silencing apparatus cavity is divided into several separate spaces by dividing plate 4, thus the acoustic interface of multiple sudden change is formed in silencing apparatus inside, when sound wave is by these acoustic interface, reflection can be produced and interfere, acoustic energy is caused to decay.The surface of dividing plate 4 and suction tude 1 central axis.
In the present invention, separate space volume is different, and according to refrigerant flow direction, the volume of downstream separate space is greater than upstream separate space, and that is, the closer to steam outlet pipe 3, separate space volume is larger.According to refrigerant flow direction, downstream separate space volume is 1.01 ~ 2.5 with the ratio of the upstream separate space volume be connected.Adopt this gradually expansion type separate space, can optimize acoustics abrupt interface, obtain the sound deadening capacity of wider deadening frequency band and Geng Gao, and enable silencing apparatus cut down the noise of special frequency channel, gradually expansion type separate space can make gas expand gradually simultaneously, produces the less pressure loss.
Dividing plate 4 is furnished with through hole type pore 5 to ventilate, when pore quantity is 1 (Fig. 1 is the center hole of arrangement in alignment, also can be not corresponding hole straggly, each plate pore position), its aperture is 0.5 ~ 1.8 times of suction tude internal diameter.Aperture is less, and sound deadening capacity is larger, and corresponding airflow pressure losses is also larger, and when pore quantity is more than 1, its aperture is the effective aperture of whole pore, and namely the gross area of pore is 0.25 ~ 3.25 times of suction tude cavity 1.1 sectional area.
Silencing apparatus of the present invention also comprises interpolation pipe 6, and interpolation pipe 6 is arranged on steam outlet pipe 3, and latter end is unsettled does not contact with suppressor case 2 any portion.The length of interpolation pipe 6 and the ratio of suppressor case 2 length are 0.1 ~ 0.7, and the center line of interpolation pipe 6 overlaps with the center line of steam outlet pipe 3.Interpolation pipe 6 can form Helmholtz's resonant cavity, and make the high-energy sound wave of certain frequency rest on silencing apparatus cavity 2.4 inner, low-yield sound wave is propagated out by interpolation pipe 6, thus reduces this frequency noise.
During use, as shown in Figure 4, on the relief opening 8.1 the present invention being arranged on compressor 8 in screw type cold water (heat pump) unit or the outlet pipe 9 be connected with exhaust outlet of compressor 8.1; Described unit also comprises condenser 10, throttle valve 11, vaporizer 12.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., be all included within protection scope of the present invention.
Claims (12)
1., for an exhaust silencer for screw type unit, comprise suction tude (1), suppressor case (2), steam outlet pipe (3) that straight line is in turn communicated with; It is characterized in that: suppressor case (2) is made up of gradual-enlargement type air admission increaser (2.1), straight tube (2.2), tapering type reducing pipe of giving vent to anger (2.3) respectively by refrigerant flow direction; In air inlet increaser (2.1), interval arranges some dividing plates (4), the inner peripheral surface of dividing plate (4) outer peripheral surface and air inlet increaser (2.1) is tightly connected, and described dividing plate (4) is provided with through hole type pore (5) and makes air inlet increaser (2.1) form some separate spaces communicated with steam outlet pipe (3); Steam outlet pipe (3) arranges interpolation pipe (6), and interpolation pipe (6) is by with steam outlet pipe (3) joint unsettled insertion silencing apparatus cavity (2.4); One end body circumference of the close steam outlet pipe (3) of interpolation pipe (6) is spaced apart is provided with spill port (7); The gyration center of described suppressor case (2) all overlaps with the gyration center of suction tude (1), steam outlet pipe (3).
2. the exhaust silencer for screw type unit according to claim 1, is characterized in that: suction tude (1), steam outlet pipe (3) are fixedly connected on suppressor case (2) respectively, and joint seals; The inner peripheral surface of dividing plate (4) outer peripheral surface and air inlet increaser (2.1) is tightly connected.
3. the exhaust silencer for screw type unit according to claim 1, is characterized in that: the internal diameter of described suction tude (1) and steam outlet pipe (3) is equal or not etc., the internal diameter ratio of suction tude (1) and steam outlet pipe (3) is not 0.6 ~ 1.
4. the exhaust silencer for screw type unit according to claim 1, it is characterized in that: straight tube (2.2) internal diameter of described suppressor case (2) is larger than suction tude (1) internal diameter, and straight tube (2.2) internal diameter and suction tude (1) internal diameter ratio are 1.2 ~ 1.9; The ratio of described suppressor case (2) total length and suction tude (1) internal diameter is 1.5 ~ 6.
5. the exhaust silencer for screw type unit according to claim 1, is characterized in that: described dividing plate (4) all with suction tude (1) central axis.
6. according to the exhaust silencer for screw type unit one of claim 1-5 Suo Shu, it is characterized in that: the number of described dividing plate (4) is 2 ~ 5.
7. the exhaust silencer for screw type unit according to claim 6, is characterized in that: described separate space volume is different, and according to refrigerant flow direction, the volume of downstream separate space is greater than upstream separate space, and the volume ratio of the separate space that is connected is 1.01 ~ 2.5; Or the distance between described two pieces of connected dividing plates is 10mm ~ 200mm.
8. according to the exhaust silencer for screw type unit one of claim 1-5 Suo Shu, it is characterized in that: when the upper pore (5) of dividing plate (4) is one, aperture is suction tude (1) internal diameter 0.5 ~ 1.8; Or when pore (5) quantity on single dividing plate (4) is more than 1, the gross area of the pore (5) on this single dividing plate (4) is 0.25 ~ 3.25 times of suction tude cavity (1.1) sectional area.
9. the exhaust silencer for screw type unit according to claim 1, is characterized in that: interpolation pipe (6) center line overlaps with muffler outlet piper (3) center line.
10. the exhaust silencer for screw type unit according to claim 1, is characterized in that: the degree of depth in described interpolation pipe (6) insertion silencing apparatus cavity (2.4) and the ratio of suppressor case (2) total length are 0.1 ~ 0.7.
11. exhaust silencers for Screw chiller according to claim 1, is characterized in that: silencing apparatus is arranged in screw-type water chiller or heat pump unit.
12. exhaust silencers for Screw chiller according to claim 11, is characterized in that: on the relief opening (8.1) that silencing apparatus is arranged on compressor (8) in screw-type water chiller or heat pump unit or the outlet pipe (9) that is connected with exhaust outlet of compressor (8.1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510214750.3A CN104832247B (en) | 2015-04-29 | 2015-04-29 | Exhaust silencer for screw-type unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510214750.3A CN104832247B (en) | 2015-04-29 | 2015-04-29 | Exhaust silencer for screw-type unit |
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| Publication Number | Publication Date |
|---|---|
| CN104832247A true CN104832247A (en) | 2015-08-12 |
| CN104832247B CN104832247B (en) | 2017-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510214750.3A Active CN104832247B (en) | 2015-04-29 | 2015-04-29 | Exhaust silencer for screw-type unit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109404092A (en) * | 2017-08-17 | 2019-03-01 | 河南奔马股份有限公司 | A kind of exhaust silencer and vehicle |
| CN111472958A (en) * | 2020-03-16 | 2020-07-31 | 珠海格力节能环保制冷技术研究中心有限公司 | Silencer structure, compressor and refrigerator with same |
| US11079121B2 (en) | 2017-08-09 | 2021-08-03 | Carrier Corporation | Muffler for a refrigeration system and the refrigeration system |
| WO2024152144A1 (en) * | 2023-01-16 | 2024-07-25 | 大连理工大学 | Pipeline broadband sound insulation structure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11079121B2 (en) | 2017-08-09 | 2021-08-03 | Carrier Corporation | Muffler for a refrigeration system and the refrigeration system |
| CN109404092A (en) * | 2017-08-17 | 2019-03-01 | 河南奔马股份有限公司 | A kind of exhaust silencer and vehicle |
| CN111472958A (en) * | 2020-03-16 | 2020-07-31 | 珠海格力节能环保制冷技术研究中心有限公司 | Silencer structure, compressor and refrigerator with same |
| WO2024152144A1 (en) * | 2023-01-16 | 2024-07-25 | 大连理工大学 | Pipeline broadband sound insulation structure |
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| CN104832247B (en) | 2017-05-03 |
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