CN106401965B - Exhaust bearing seat and screw compressor - Google Patents
Exhaust bearing seat and screw compressor Download PDFInfo
- Publication number
- CN106401965B CN106401965B CN201610481344.8A CN201610481344A CN106401965B CN 106401965 B CN106401965 B CN 106401965B CN 201610481344 A CN201610481344 A CN 201610481344A CN 106401965 B CN106401965 B CN 106401965B
- Authority
- CN
- China
- Prior art keywords
- bearing block
- tonifying
- supplementing opening
- gas supplementing
- damping chamber
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000001502 supplementing effect Effects 0.000 claims abstract description 60
- 230000010349 pulsation Effects 0.000 claims abstract description 43
- 238000000034 method Methods 0.000 claims abstract description 4
- 238000013016 damping Methods 0.000 claims description 37
- 230000000737 periodic effect Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 2
- 230000002238 attenuated effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 210000003781 tooth socket Anatomy 0.000 description 3
- 210000001367 artery Anatomy 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C18/14—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
- F04C18/16—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The invention relates to the relevant field of compressors and discloses an exhaust bearing seat and a screw compressor, wherein the exhaust bearing seat comprises a bearing seat body, an air supplementing port is formed in the end face of the bearing seat body, an air supplementing pulsation attenuation cavity communicated with the air supplementing port is further arranged on the bearing seat body, and the volume of the air supplementing pulsation attenuation cavity is larger than that of the air supplementing port. The screw compressor comprises the exhaust bearing seat. According to the bearing seat body, the air supply pulsation attenuation cavity communicated with the air supply port is arranged, so that low-frequency vibration generated by the air supply port can be mutually superposed in the air supply pulsation attenuation cavity in the air supply process, airflow pulsation generated by the air supply port is attenuated in the air supply pulsation attenuation cavity, the purpose of reducing the air supply airflow pulsation is achieved, vibration and noise of an air supply pipeline of the screw compressor are reduced, and the reliability of the screw compressor is improved.
Description
Technical field
The present invention relates to compressor related fields more particularly to a kind of exhaust bearing blocks and helical-lobe compressor.
Background technique
The gas supplementing opening split axle of helical-lobe compressor is to gas supplementing opening and radial two kinds of gas supplementing opening at present, wherein axial gas supplementing opening is as schemed
Shown in 1, to carry out tonifying Qi along compressor drum outer diameter, common structure is to open on the shell or slide valve for surrounding rotor
If axial gas supplementing opening 100；For radial gas supplementing opening as shown in Fig. 2, it carries out tonifying Qi from the exhaust of rotor, common structure is to be vented
Radial gas supplementing opening 200 is opened up on bearing block.
It is the diameter for increasing gas supplementing opening and gas supplementing opening to improve air compensation common practice.However during tonifying Qi
The case where there are mechanical periodicities due to helical-lobe compressor gas has N number of tooth socket to be counted by domestic supply frequency 50HZ on rotor
It calculates, then the pulsating quantity of superfeed pressure has N × 50HZ.N × 50HZ pulsation of above-mentioned gas supplementing opening can be transmitted to tonifying Qi pipeline 300
On, it causes the vibration of tonifying Qi pipeline and generates huge noise.Noise reduction would generally be increased on external blowdown pipe road 300 at present
Device 400 (can refer to Fig. 1 and Fig. 2), to reduce the noise of tonifying Qi pipeline 300, but can still have biggish noise.
Summary of the invention
The purpose of the present invention is to provide a kind of exhaust bearing blocks, to solve the gas of existing gas supplementing opening generation to benefit
The excessive problem of the vibration and noise that air pipe generates.
It is existing to solve another object of the present invention is to provide a kind of helical-lobe compressor, including above-mentioned exhaust bearing block
The noise of the tonifying Qi pipeline of the helical-lobe compressor problem big with vibration.
To achieve this purpose, the present invention adopts the following technical scheme:
A kind of exhaust bearing block, including bearing block ontology offer gas supplementing opening on the end face of the bearing block ontology, described
The tonifying Qi pulsation damping chamber being connected with gas supplementing opening is additionally provided on bearing block ontology, the volume of the tonifying Qi pulsation damping chamber is greater than
The volume of gas supplementing opening.
Preferably, the volume of the tonifying Qi pulsation damping chamber is at least 5 times of the volume of gas supplementing opening.
Preferably, the depth of the tonifying Qi pulsation damping chamber is 40mm-60mm.
Preferably, the cross sectional shape of the tonifying Qi pulsation damping chamber is oblong, circle or rectangular.
Preferably, being connected by setting in the intrinsic through-hole of bearing block between the tonifying Qi pulsation damping chamber and gas supplementing opening
It is logical.
Preferably, the tonifying Qi pulsation damping chamber is arranged on the side wall of the bearing block ontology.
Preferably, being equipped with male rotor on the bearing block ontology, the gas supplementing opening is corresponding with the tooth of male rotor to be set
It sets, and by the tooth periodic seal of the male rotor.
Preferably, the cross-sectional area for stating gas supplementing opening is not more than the cross-sectional area of the tooth of male rotor.
Preferably, the shape of the gas supplementing opening is consistent with the cross sectional shape of the tooth of male rotor.
The present invention also provides a kind of helical-lobe compressors, including above-mentioned exhaust bearing block.
Bearing block ontology of the invention, can be in tonifying Qi by the way that the tonifying Qi being connected with gas supplementing opening pulsation damping chamber is arranged
The low-frequency vibration for generating gas supplementing opening in journey is overlapped mutually in tonifying Qi pulsation damping chamber, and the gas for generating gas supplementing opening exists
Decay in tonifying Qi pulsation damping chamber, achievees the purpose that reduce tonifying Qi gas, thereby reduce helical-lobe compressor tonifying Qi
The vibration and noise of pipeline.
Helical-lobe compressor of the invention efficiently solves existing helical-lobe compressor by the way that above-mentioned exhaust bearing block is arranged
Tonifying Qi pipeline noise and vibrate big problem, improve the reliability of helical-lobe compressor.
Detailed description of the invention
Fig. 1 is the compressor arrangement schematic diagram that the present invention is provided with axial gas supplementing opening in the prior art；
Fig. 2 is the compressor arrangement schematic diagram that the present invention is provided with radial gas supplementing opening in the prior art；
Fig. 3 is the structural schematic diagram for the exhaust bearing block that the present invention is equipped with male rotor and female rotor；
Fig. 4 is the schematic perspective view of present invention exhaust bearing block；
Fig. 5 is the main view of present invention exhaust bearing block；
Fig. 6 is the sectional view along A-A of Fig. 5 of the present invention；
Fig. 7 is the B-B direction cross-sectional view of Fig. 6 of the present invention.
In figure:
1, bearing block ontology；2, gas supplementing opening；3, tonifying Qi pulsation damping chamber；4, through-hole；5, male rotor；6, female rotor；7, it mends
Gas channel；100, axial gas supplementing opening；200, radial gas supplementing opening；300, tonifying Qi pipeline；400, muffler.
Specific embodiment
To further illustrate the technical scheme of the present invention below with reference to the accompanying drawings and specific embodiments.
Embodiment one:
The present embodiment provides a kind of exhaust bearing blocks, and as shown in fig. 3 to 7, which includes bearing block ontology 1, open
The gas supplementing opening 2 being located on 1 end face of bearing block ontology, and the tonifying Qi for being arranged on bearing block ontology 1 and being connected with gas supplementing opening 2
The volume of pulsation damping chamber 3, above-mentioned tonifying Qi pulsation damping chamber 3 is greater than the volume of gas supplementing opening 2.Pass through above-mentioned tonifying Qi pulsation damping chamber
3, during the periodical tonifying Qi of gas supplementing opening 2, the gas that gas supplementing opening 2 generates can decay in tonifying Qi pulsation damping chamber 3, have
Body principle are as follows: the ripple frequency for the air-flow being introduced into tonifying Qi pulsation damping chamber 3 can change, and enter tonifying Qi pulsation with rear
The air motion frequency of damping chamber 3 is different, can be superimposed decaying between the two.It is pulsed in damping chamber 3 by gas in tonifying Qi
Decaying, achieve the purpose that reduce tonifying Qi gas, thereby reduce the vibration and noise of tonifying Qi pipeline.In this implementation, on
Tonifying Qi pulsation damping chamber 3 is stated to be cast on bearing block ontology 1.
In the present embodiment, as long as the volume that the volume satisfaction of above-mentioned tonifying Qi pulsation damping chamber 3 is greater than gas supplementing opening 2 can be realized
Decaying to the gas that gas supplementing opening 2 generates, but the vibration in order to preferably reach decaying gas, reduce tonifying Qi pipeline
Dynamic and noise purpose preferably sets the volume of tonifying Qi pulsation damping chamber 3 to 5 times or more of the volume of gas supplementing opening 2.
The cross sectional shape of above-mentioned tonifying Qi pulsation damping chamber 3 can be oblong, circle or rectangular, be also possible to other not
Regular shape specifically can according to need setting, on condition that meet the volume that its volume is greater than gas supplementing opening 2.In the present embodiment
It is oblong that the cross sectional shape of tonifying Qi pulsation damping chamber 3, which is preferably selected, can refer to Fig. 6 and Fig. 7, tonifying Qi pulsation damping chamber 3
Length L be 120mm, width W is 60mm, and depth H (also referred to as height) is 40mm-60mm, to reach better decaying
The purpose of tonifying Qi gas.It, specifically can be with it should be noted that above-mentioned size is not limited to size listed by the present embodiment
Experimental simulation result or experimental result are adjusted.
In the present embodiment, as shown in fig. 7, by being arranged in bearing block between above-mentioned tonifying Qi pulsation damping chamber 3 and gas supplementing opening 2
Through-hole 4 in ontology 1 is connected to, to realize that the air-flow that gas supplementing opening 2 generates is able to enter tonifying Qi pulsation damping chamber 3.The hole of the through-hole 4
Diameter can according to need setting, so that tonifying Qi is pulsed, damping chamber 3 is optimal effect to gas decaying.
Preferably, above-mentioned tonifying Qi pulsation damping chamber 3 is arranged on the side wall of bearing block ontology 1, in order to the present embodiment
It is vented the manufacture of bearing block.
In the present embodiment, as shown in figure 3, being equipped with male rotor 5 on above-mentioned bearing block ontology 1 and cooperating with male rotor 5
The female rotor 6 used, the setting corresponding with the tooth of male rotor 5 of gas supplementing opening 2, and by the tooth periodic seal of male rotor 5, i.e. tonifying Qi
When mouthful 2 tonifying Qi, sealing is not blocked by the tooth of male rotor 5, can the tonifying Qi into the tooth socket of male rotor 5, with turn of male rotor 5
Dynamic, gas supplementing opening 2 can be sealed by male rotor 5, and tonifying Qi process terminates.
Preferably, the cross-sectional area of above-mentioned gas supplementing opening 2 is no more than the cross-sectional area of the tooth of male rotor 5, i.e., gas supplementing opening 2 can
It is fully sealed by the end face of the tooth of male rotor 5, while guaranteeing enough air compensations, can be avoided appearance across tooth socket gas blowby
Situation.
In order to preferably guarantee that gas supplementing opening 2 can be sealed by the tooth of male rotor 5, in the present embodiment the shape of gas supplementing opening 2 with
The cross sectional shape of the tooth of male rotor 5 is consistent, and tooth profile of the outer edge contour of gas supplementing opening 2 relative to the tooth of male rotor 5
Distance is 1-2mm.
Referring to Fig. 7, bearing block ontology 1 is equipped with air supply passage 7, which connects with extraneous and gas supplementing opening 2 respectively
It is logical.
The exhaust bearing block of the present embodiment is by above-mentioned tonifying Qi pulsation damping chamber 3, the air-flow arteries and veins that gas supplementing opening 2 can be made to generate
It moves and decays in tonifying Qi pulsation damping chamber 3, achieve the purpose that reduce tonifying Qi gas, reduce the vibration of tonifying Qi pipeline
And noise.
Embodiment two:
The present embodiment provides a kind of helical-lobe compressors comprising exhaust bearing block described in embodiment one.By in setting
Exhaust bearing block is stated, efficiently solves the problems, such as that the noise of the tonifying Qi pipeline of existing helical-lobe compressor and vibration are big, improves
The reliability of helical-lobe compressor.
Obviously, the above embodiment of the present invention is just for the sake of clearly illustrating examples made by the present invention, and being not is pair
The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all this
Made any modifications, equivalent replacements, and improvements etc., should be included in the claims in the present invention within the spirit and principle of invention
Protection scope within.
Claims (9)
1. a kind of exhaust bearing block, including bearing block ontology (1), gas supplementing opening is offered on the end face of the bearing block ontology (1)
(2), which is characterized in that tonifying Qi pulsation damping chamber (3) being connected with gas supplementing opening (2) is additionally provided on the bearing block ontology (1),
The volume of tonifying Qi pulsation damping chamber (3) is greater than the volume of gas supplementing opening (2), and tonifying Qi pulsation damping chamber (3) is arranged in institute
On the side wall for stating bearing block ontology (1).
2. exhaust bearing block according to claim 1, which is characterized in that the volume of tonifying Qi pulsation damping chamber (3) is extremely
It is less 5 times of the volume of gas supplementing opening (2).
3. exhaust bearing block according to claim 1, which is characterized in that the depth of tonifying Qi pulsation damping chamber (3) is
40mm-60mm。
4. exhaust bearing block according to claim 1, which is characterized in that the section shape of tonifying Qi pulsation damping chamber (3)
Shape is oblong, circle or rectangular.
5. exhaust bearing block according to claim 1, which is characterized in that tonifying Qi pulsation damping chamber (3) and gas supplementing opening
(2) through-hole (4) connection between by being arranged in bearing block ontology (1).
6. exhaust bearing block according to claim 1, which is characterized in that be equipped with sun on the bearing block ontology (1) and turn
Sub (5), gas supplementing opening (2) setting corresponding with the tooth of male rotor (5), and by the tooth periodic seal of the male rotor (5).
7. exhaust bearing block according to claim 6, which is characterized in that the cross-sectional area of the gas supplementing opening (2) is not more than
The cross-sectional area of the tooth of male rotor (5).
8. exhaust bearing block according to claim 7, which is characterized in that the shape of the gas supplementing opening (2) and male rotor (5)
Tooth cross sectional shape it is consistent.
9. a kind of helical-lobe compressor, which is characterized in that including exhaust bearing block a method as claimed in any one of claims 1-8.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610481344.8A CN106401965B (en) | 2016-06-24 | 2016-06-24 | Exhaust bearing seat and screw compressor |
| PCT/CN2017/082196 WO2017219758A1 (en) | 2016-06-24 | 2017-04-27 | Gas discharging bearing seat and screw compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610481344.8A CN106401965B (en) | 2016-06-24 | 2016-06-24 | Exhaust bearing seat and screw compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106401965A CN106401965A (en) | 2017-02-15 |
| CN106401965B true CN106401965B (en) | 2019-03-22 |
Family
ID=58006050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610481344.8A Active CN106401965B (en) | 2016-06-24 | 2016-06-24 | Exhaust bearing seat and screw compressor |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN106401965B (en) |
| WO (1) | WO2017219758A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106401965B (en) * | 2016-06-24 | 2019-03-22 | 珠海格力电器股份有限公司 | Exhaust bearing seat and screw compressor |
| CN106949051B (en) * | 2017-03-20 | 2018-11-30 | 珠海格力电器股份有限公司 | Slide valve for compressor and screw compressor with slide valve |
| CN112483401A (en) * | 2019-09-11 | 2021-03-12 | 复盛实业(上海)有限公司 | Exhaust bearing seat and compressor |
| CN114790984A (en) * | 2022-01-20 | 2022-07-26 | 赵忠显 | Novel high-efficient pressure boost screw compressor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010242663A (en) * | 2009-04-08 | 2010-10-28 | Ihi Corp | Screw compressor |
| CN101979880A (en) * | 2010-04-26 | 2011-02-23 | 上海维尔泰克螺杆机械有限公司 | Screw compressor |
| CN202991397U (en) * | 2012-11-22 | 2013-06-12 | 广东美芝制冷设备有限公司 | Silencer of compressor and compressor with same |
| CN205243853U (en) * | 2015-12-21 | 2016-05-18 | 珠海格力电器股份有限公司 | Compressor air supplement structure and compressor |
| CN205858689U (en) * | 2016-06-24 | 2017-01-04 | 珠海格力电器股份有限公司 | Exhaust bearing seat and screw compressor |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100286837B1 (en) * | 1998-07-15 | 2001-05-02 | 구자홍 | Resonator of a rotary compressor |
| JP3985513B2 (en) * | 2001-12-07 | 2007-10-03 | ダイキン工業株式会社 | Rotary compressor |
| CN202707494U (en) * | 2012-05-11 | 2013-01-30 | 深圳市福瑞客科技有限公司 | Compressor and air charging device |
| WO2014112088A1 (en) * | 2013-01-17 | 2014-07-24 | 株式会社日立産機システム | Fluid machine |
| CN204511894U (en) * | 2015-03-10 | 2015-07-29 | 苏州通润驱动设备股份有限公司 | Exhaust airstream pulsation damping device and screw compressor system thereof |
| CN204851651U (en) * | 2015-07-23 | 2015-12-09 | 重庆凌达压缩机有限公司 | Horizontal compressor and flange assembly admits air thereof |
| CN106401965B (en) * | 2016-06-24 | 2019-03-22 | 珠海格力电器股份有限公司 | Exhaust bearing seat and screw compressor |
-
2016
- 2016-06-24 CN CN201610481344.8A patent/CN106401965B/en active Active
-
2017
- 2017-04-27 WO PCT/CN2017/082196 patent/WO2017219758A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010242663A (en) * | 2009-04-08 | 2010-10-28 | Ihi Corp | Screw compressor |
| CN101979880A (en) * | 2010-04-26 | 2011-02-23 | 上海维尔泰克螺杆机械有限公司 | Screw compressor |
| CN202991397U (en) * | 2012-11-22 | 2013-06-12 | 广东美芝制冷设备有限公司 | Silencer of compressor and compressor with same |
| CN205243853U (en) * | 2015-12-21 | 2016-05-18 | 珠海格力电器股份有限公司 | Compressor air supplement structure and compressor |
| CN205858689U (en) * | 2016-06-24 | 2017-01-04 | 珠海格力电器股份有限公司 | Exhaust bearing seat and screw compressor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106401965A (en) | 2017-02-15 |
| WO2017219758A1 (en) | 2017-12-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106401965B (en) | Exhaust bearing seat and screw compressor | |
| CN106382231B (en) | Active attenuation screw compressor air flow pulsation device | |
| CN107339264A (en) | A kind of blower fan system auxiliary denoising device of single air-inlet range hood | |
| CN206592349U (en) | A kind of blower fan system auxiliary denoising device of single air-inlet range hood | |
| CN205858689U (en) | Exhaust bearing seat and screw compressor | |
| CN202833034U (en) | Silencer with double sound eliminating functions | |
| CN206346815U (en) | Multi-stage diffluence formula Low ESR environment protecting type engine muffler | |
| CN106194755A (en) | Screw compressor | |
| CN104420938A (en) | Transverse silencer | |
| WO2020056982A1 (en) | Screw compressor slide valve having airflow pulsation attenuation function and screw compressor | |
| CN105134555A (en) | Compressor air sucking and sound reduction device with three cavities arranged side by side | |
| CN207111277U (en) | A kind of muffler | |
| CN204877858U (en) | Formula compressor muffler of breathing in is arranged side by side in three chambeies | |
| CN209469523U (en) | Motorcycle and air filter air inlet processing mechanism | |
| CN205779624U (en) | Built-in low pulse, low vibration-type pump assembly and water purifier | |
| CN206360862U (en) | It is a kind of to reduce the quadratic extension formula air suction silencer of freezer compressor noise | |
| CN207750228U (en) | A kind of top water flowing out structure of diaphragm pump | |
| CN203978559U (en) | A kind of Simple muffler | |
| CN205858442U (en) | Deafener and jumbolter | |
| CN207830230U (en) | A kind of wind turbine damping and silencing device | |
| CN205207088U (en) | Air compressor machine muffler | |
| CN205781661U (en) | A kind of two-stage deafener of compressed air blowdown piping end | |
| CN110469486B (en) | Three-cavity profiling air suction silencer and compressor | |
| CN207393414U (en) | A kind of muffler | |
| CN204327253U (en) | A kind of silencing apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |