CN210068476U - Efficient two-stage compression air compressor main engine - Google Patents
Efficient two-stage compression air compressor main engine Download PDFInfo
- Publication number
- CN210068476U CN210068476U CN201821493057.XU CN201821493057U CN210068476U CN 210068476 U CN210068476 U CN 210068476U CN 201821493057 U CN201821493057 U CN 201821493057U CN 210068476 U CN210068476 U CN 210068476U
- Authority
- CN
- China
- Prior art keywords
- stage compression
- shell
- compression chamber
- chamber
- gear
- 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.)
- Expired - Fee Related
Links
- 238000007906 compression Methods 0.000 title claims abstract description 102
- 230000006835 compression Effects 0.000 title claims abstract description 99
- 238000001816 cooling Methods 0.000 claims abstract description 13
- 238000001914 filtration Methods 0.000 claims description 22
- 238000009826 distribution Methods 0.000 claims description 18
- 239000003921 oil Substances 0.000 claims description 14
- 239000010687 lubricating oil Substances 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 238000003860 storage Methods 0.000 claims description 7
- 229910001220 stainless steel Inorganic materials 0.000 claims description 6
- 239000010935 stainless steel Substances 0.000 claims description 6
- 229920000742 Cotton Polymers 0.000 claims description 4
- 239000004745 nonwoven fabric Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 239000003595 mist Substances 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Images
Landscapes
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The utility model provides an efficient two-stage compression air compressor main machine, which comprises a main machine shell, wherein a first-stage compression chamber and a second-stage compression chamber are arranged on the main machine shell, two first rotors are rotatably arranged in the first-stage compression chamber, two second rotors are rotatably arranged in the second-stage compression chamber, a first air inlet and a first air outlet are arranged on the first-stage compression chamber, a second air inlet and a second air outlet are arranged on the second-stage compression chamber, and the first air outlet is connected with the second air inlet through a cooling pipeline; the utility model provides thereby the continuity of improve equipment production improves production efficiency, has improved the availability factor of equipment simultaneously, has improved the life of equipment, has reduced manufacturing cost, has improved product quality.
Description
Technical Field
The utility model relates to an air compressor machine host computer, in particular to efficient two-stage compression air compressor machine host computer.
Background
Air compressors are widely used in industrial production. In the name industry, it is responsible for providing a source of air to all of the pneumatic components of a plant, including the various pneumatic valves. So that the quality of operation directly affects the production process of the factory.
The air compressor is a main body of an air source device, is a device for converting mechanical energy of a prime mover into gas pressure energy, and is an air pressure generating device for compressing air. Air compressors commonly used today include piston air compressors, screw air compressors, centrifugal compressors, sliding vane air compressors and scroll air compressors.
The air compressor generally uses the asynchronous motor and the primary compression to compress air, so that the output power of the motor is large, the energy consumption is high, the efficiency is low, and the structure is generally complex and inconvenient to disassemble, repair and maintain.
SUMMERY OF THE UTILITY MODEL
The utility model provides an efficient two-stage compression air compressor host computer to above-mentioned problem, thereby the continuity of improve equipment production improves production efficiency, has improved the availability factor of equipment simultaneously, has improved the life of equipment, has reduced manufacturing cost, has improved product quality.
The specific technical scheme is as follows:
a high-efficiency two-stage compression air compressor main machine comprises a main machine shell, wherein a first-stage compression chamber and a second-stage compression chamber are arranged on the main machine shell, the first-stage compression chamber is positioned above the second-stage compression chamber, a first adjusting chamber is arranged at the front end of the first-stage compression chamber and the front end of the second-stage compression chamber, and a second upper adjusting chamber and a second lower adjusting chamber are respectively arranged at the rear ends of the first-stage compression chamber and the second-stage compression chamber;
two first rotors are rotatably arranged in the first-stage compression chamber, a first front supporting shaft positioned at the front end of the first rotor penetrates through the first-stage compression chamber and is arranged in the first adjusting chamber, a first gear is fixed on the part, positioned in the first adjusting chamber, of the first front supporting shaft, and the two first gears on the two first rotors are meshed with each other;
a first rear supporting shaft positioned at the rear end of the first rotor penetrates through the first-stage compression chamber and is arranged in the second upper adjusting chamber, and the first rear supporting shaft is rotatably fixed on the inner wall of the second upper adjusting chamber through a shaft sleeve;
two second rotors are rotatably arranged in the two-stage compression chamber, a second front supporting shaft positioned at the front end of the second rotor penetrates through the two-stage compression chamber to be arranged in the first adjusting chamber, a second gear is fixed on the part, positioned in the first adjusting chamber, of the second front supporting shaft, and the two second gears on the two second rotors are meshed;
a second rear supporting shaft positioned at the rear end of the second rotor passes through the secondary compression chamber and is arranged in a second lower adjusting chamber, and the second rear supporting shaft is rotatably fixed on the inner wall of the second lower adjusting chamber through a shaft sleeve;
a third gear is rotatably arranged in the first adjusting chamber and is positioned between the two first gears and the two second gears, the upper end and the lower end of the third gear are respectively meshed with one first gear and one second gear, the third gear is connected with an output shaft of a motor, and the motor drives the third gear to rotate so as to drive the first gear and the second gear which are meshed with the third gear to simultaneously rotate in the same direction and finally drive the first rotor and the second rotor to rotate;
the motor is fixed on the outer wall of the first adjusting chamber;
the first-stage compression chamber is provided with a first air inlet and a first air outlet, the second-stage compression chamber is provided with a second air inlet and a second air outlet, and the first air outlet and the second air inlet are connected through a cooling pipeline.
Further, the cooling pipeline includes pipeline main part, is equipped with a plurality of atomizer in the pipeline main part, and atomizer is connected with the oil storage tank through the pipeline, is equipped with lubricating oil in the oil storage tank.
Further, the atomizing nozzle is obliquely arranged.
Furthermore, an oil inlet is formed in the first-stage compression cavity and used for introducing lubricating oil into the first-stage compression cavity.
Furthermore, an air filtering mechanism is arranged on the first air inlet.
Furthermore, the air filtering mechanism comprises a filtering mechanism shell, the filtering mechanism shell sequentially comprises a first shell, a second shell and a third shell with circular ring-shaped sections from top to bottom, the first shell and the second shell and the third shell are respectively connected through a switching shell which is obliquely arranged, the inner diameters of the first shell and the third shell are equal, and the inner diameter of the second shell is twice of the inner diameter of the first shell;
a flow distribution mechanism is arranged in the second shell, the flow distribution mechanism comprises a flow distribution block with a cylindrical structure, the upper end and the lower end of the flow distribution block are respectively provided with a flow guide block with a conical structure, the flow distribution block is coaxially arranged in the second shell, the outer wall of the flow distribution block is uniformly provided with a plurality of flow distribution plates, the flow distribution plates are detachably fixed on the inner wall of the second shell through screws, and the flow distribution plates divide the second shell into a plurality of filter cavities;
a first filtering component is arranged in the first shell and the third shell respectively, and a second filtering component is arranged in each filtering cavity in the second shell respectively.
Furthermore, the first filtering component comprises a first frame consisting of a stainless steel mesh plate, filter cotton is arranged in the first frame, and the first frame is detachably fixed on the inner wall of the first shell or the inner wall of the third shell through screws.
Furthermore, the second filtering component comprises a second frame consisting of a stainless steel mesh plate, activated carbon wrapped by non-woven fabrics is arranged in the second frame, and the second frame is detachably fixed in the filtering cavity of the second shell through screws.
The utility model discloses a theory of operation does:
natural air enters a first-stage compression chamber through an air filtering mechanism to be compressed for the first time, the natural air is mixed with a small amount of lubricating oil in the first-stage compression chamber, meanwhile, mixed gas is compressed to an interstage pressure, and the compressed gas enters a cooling pipeline and contacts a large amount of oil mist, so that the temperature is greatly reduced; the cooled compressed gas enters a secondary compression chamber for secondary compression and is compressed to the final exhaust pressure; finally, the gas is discharged out of the compressor, and the whole compression process is completed.
The utility model has the advantages that:
(1) according to the engineering thermodynamic theory, the air compressor is compressed at a constant temperature in the compression process to save the most power. The lower the density of the gas at high temperatures, the more work is required for compression. Moreover, the constant-temperature compression not only can reduce the consumed work, but also can reduce the temperature of the compressed gas, so that the material of the air compressor is used more widely and economically, and the operation of the air compressor is more reliable. However, the constant temperature compression cannot be realized in actual work because the heat of the gas is required to be exchanged with the outside at any time, and the temperature of the gas is equal to the outside. While staged compression plus intermediate cooling is an effective method to reduce the exhaust gas temperature.
(2) The two pairs of rotors do work simultaneously through one motor, the inflating speed is high, the air output is large, the compression of each stage is much smaller than that of a single-pole compression due to double-stage compression, the pressure on the rotors and the bearings is small, and the rotors are large in diameter and low in rotating speed, so that the operation is more reliable.
(3) During primary compression, air and a small amount of lubricating oil mixed gas are compressed to interstage pressure in the compression cavity, and the compressed gas enters the cooling channel and contacts with a large amount of oil mist, so that the temperature is greatly reduced; after primary compression, the air is cooled by reinforced oil injection, so that the secondary air suction temperature is reduced, and the air is subjected to isobaric compression to reduce the compression work;
(4) the two-stage compression generally adopts an equal pressure ratio to set the interstage pressure, so that the compression ratio of each stage is greatly reduced compared with the compression ratio of a single stage, the backflow leakage between rotors is greatly reduced, the volumetric efficiency and the heat insulation efficiency are greatly improved, and the gas production rate of the compressor is correspondingly improved.
(5) To sum up, the utility model discloses an it is extravagant to eliminate unnecessary electric energy, really is the enterprise energy-conservation, calculates according to operation 7200 hours, saves electric energy 46 ten thousand degrees in the estimated year.
Drawings
FIG. 1 is a cross-sectional view of the present invention.
Fig. 2 is a layout view of the first gear, the second gear, and the third gear.
Fig. 3 is a cross-sectional view of a cooling duct.
FIG. 4 is a cross-sectional view of an air filter mechanism.
Fig. 5 is a sectional view taken along a line a-a in fig. 4.
Detailed Description
For making the technical scheme of the utility model clear more clearly and definitely, it is right to combine the drawing below the utility model discloses further describe, any is right the utility model discloses technical scheme's technical characteristic carries out the scheme that equivalent replacement and conventional reasoning reachs and all falls into the utility model discloses protection scope.
Reference numerals
The main machine shell 1, the primary compression chamber 2, the secondary compression chamber 3, the first regulation chamber 4, the second upper regulation chamber 5, the second lower regulation chamber 6, the first rotor 7, the first front support shaft 8, the first gear 9, the first rear support shaft 10, the second rotor 11, the second front support shaft 12, the second gear 13, the second rear support shaft 14, the third gear 15, the motor 16, the first air inlet 17, the first air outlet 18, the second air inlet 19, the second air outlet 20, the cooling duct 21, the duct main body 22, the atomizer 23, the oil storage tank 24, the air filter mechanism 25, the first shell 26, the second shell 27, the third shell 28, the adapter shell 29, the diverter block 30, the deflector block 31, the diverter plate 32, the cavity 33, the first filter assembly 34, the second filter assembly 35, the first frame 36, the filter cotton 37, the second frame 38, and the activated carbon 39.
As shown in the figure, the high-efficiency two-stage compression air compressor main machine comprises a main machine shell 1, wherein a first-stage compression chamber 2 and a second-stage compression chamber 3 are arranged on the main machine shell, the first-stage compression chamber is positioned above the second-stage compression chamber, a first adjusting chamber 4 is arranged at the front ends of the first-stage compression chamber and the second-stage compression chamber, and a second upper adjusting chamber 5 and a second lower adjusting chamber 6 are respectively arranged at the rear ends of the first-stage compression chamber and the second-stage compression chamber;
two first rotors 7 are rotatably arranged in the primary compression chamber, a first front support shaft 8 positioned at the front end of the first rotor penetrates through the primary compression chamber and is arranged in the first adjusting chamber, a first gear 9 is fixed on the part of the first front support shaft positioned in the first adjusting chamber, and two first gears on the two first rotors are meshed;
a first rear supporting shaft 10 positioned at the rear end of the first rotor passes through the primary compression chamber and is arranged in the second upper adjusting chamber, and the first rear supporting shaft is rotatably fixed on the inner wall of the second upper adjusting chamber through a shaft sleeve;
two second rotors 11 are rotatably arranged in the two-stage compression chamber, a second front support shaft 12 positioned at the front end of the second rotors penetrates through the two-stage compression chamber to be arranged in the first adjusting chamber, a second gear 13 is fixed on the part of the second front support shaft positioned in the first adjusting chamber, and two second gears on the two second rotors are meshed;
a second rear supporting shaft 14 positioned at the rear end of the second rotor passes through the secondary compression chamber and is arranged in the second lower adjusting chamber, and the second rear supporting shaft is rotatably fixed on the inner wall of the second lower adjusting chamber through a shaft sleeve;
a third gear 15 is rotatably arranged in the first adjusting chamber, the third gear is positioned between the two first gears and the two second gears, the upper end and the lower end of the third gear are respectively meshed with one first gear and one second gear, the third gear is connected with an output shaft of a motor 16, and the motor drives the third gear to rotate so as to drive the first gear and the second gear which are meshed with the third gear to simultaneously rotate in the same direction and finally drive the first rotor and the second rotor to rotate;
the motor is fixed on the outer wall of the first adjusting chamber;
the first-stage compression chamber is provided with a first air inlet 17 and a first air outlet 18, the second-stage compression chamber is provided with a second air inlet 19 and a second air outlet 20, and the first air outlet and the second air inlet are connected through a cooling pipeline 21.
Further, the cooling pipeline comprises a pipeline main body 22, a plurality of atomizing spray heads 23 are arranged on the pipeline main body and connected with an oil storage tank 24 through pipelines, and lubricating oil is arranged in the oil storage tank.
Further, the atomizing nozzle is obliquely arranged.
Furthermore, an oil inlet is formed in the first-stage compression cavity and used for introducing lubricating oil into the first-stage compression cavity.
Further, an air filter mechanism 25 is provided on the first air inlet.
Further, the air filtering mechanism comprises a filtering mechanism shell, the filtering mechanism shell sequentially comprises a first shell 26, a second shell 27 and a third shell 28 with circular ring-shaped cross sections from top to bottom, the first shell and the second shell and the third shell are respectively connected through a switching shell 29 which is obliquely arranged, the inner diameters of the first shell and the third shell are equal, and the inner diameter of the second shell is twice of the inner diameter of the first shell;
a flow dividing mechanism is arranged in the second shell, the flow dividing mechanism comprises a flow dividing block 30 with a cylindrical structure, the upper end and the lower end of the flow dividing block are respectively provided with a flow guiding block 31 with a conical structure, the flow dividing blocks are coaxially arranged in the second shell, the outer wall of the flow dividing block is uniformly provided with a plurality of flow dividing plates 32, the flow dividing plates are detachably fixed on the inner wall of the second shell through screws, and the flow dividing plates divide the second shell into a plurality of filter cavities 33;
a first filter assembly 34 is arranged in each of the first and third housings, and a second filter assembly 35 is arranged in each of the filter chambers in the second housing.
Further, the first filter assembly comprises a first frame 36 composed of stainless steel mesh plates, filter cotton 37 is arranged in the first frame, and the first frame is detachably fixed on the inner wall of the first shell or the third shell through screws.
Further, the second filter assembly comprises a second frame 38 composed of a stainless steel mesh plate, activated carbon 39 wrapped by non-woven fabrics is arranged in the second frame, and the second frame is detachably fixed in the filter cavity of the second shell through screws.
The utility model discloses a theory of operation does:
natural air enters a first-stage compression chamber through an air filtering mechanism to be compressed for the first time, the natural air is mixed with a small amount of lubricating oil in the first-stage compression chamber, meanwhile, mixed gas is compressed to an interstage pressure, and the compressed gas enters a cooling pipeline and contacts a large amount of oil mist, so that the temperature is greatly reduced; the cooled compressed gas enters a secondary compression chamber for secondary compression and is compressed to the final exhaust pressure; finally, the gas is discharged out of the compressor, and the whole compression process is completed.
Claims (6)
1. A high-efficiency two-stage compression air compressor host is characterized by comprising a host shell, wherein a first-stage compression chamber and a second-stage compression chamber are arranged on the host shell, the first-stage compression chamber is positioned above the second-stage compression chamber, a first adjusting chamber is arranged at the front ends of the first-stage compression chamber and the second-stage compression chamber, and a second upper adjusting chamber and a second lower adjusting chamber are respectively arranged at the rear ends of the first-stage compression chamber and the second-stage compression chamber;
two first rotors are rotatably arranged in the first-stage compression chamber, a first front supporting shaft positioned at the front end of the first rotor penetrates through the first-stage compression chamber and is arranged in the first adjusting chamber, a first gear is fixed on the part, positioned in the first adjusting chamber, of the first front supporting shaft, and the two first gears on the two first rotors are meshed with each other;
a first rear supporting shaft positioned at the rear end of the first rotor penetrates through the first-stage compression chamber and is arranged in the second upper adjusting chamber, and the first rear supporting shaft is rotatably fixed on the inner wall of the second upper adjusting chamber through a shaft sleeve;
two second rotors are rotatably arranged in the two-stage compression chamber, a second front supporting shaft positioned at the front end of the second rotor penetrates through the two-stage compression chamber to be arranged in the first adjusting chamber, a second gear is fixed on the part, positioned in the first adjusting chamber, of the second front supporting shaft, and the two second gears on the two second rotors are meshed;
a second rear supporting shaft positioned at the rear end of the second rotor passes through the secondary compression chamber and is arranged in a second lower adjusting chamber, and the second rear supporting shaft is rotatably fixed on the inner wall of the second lower adjusting chamber through a shaft sleeve;
a third gear is rotatably arranged in the first adjusting chamber and is positioned between the two first gears and the two second gears, the upper end and the lower end of the third gear are respectively meshed with one first gear and one second gear, the third gear is connected with an output shaft of a motor, and the motor drives the third gear to rotate so as to drive the first gear and the second gear which are meshed with the third gear to simultaneously rotate in the same direction and finally drive the first rotor and the second rotor to rotate;
the motor is fixed on the outer wall of the first adjusting chamber;
the first-stage compression chamber is provided with a first air inlet and a first air outlet, the second-stage compression chamber is provided with a second air inlet and a second air outlet, and the first air outlet is connected with the second air inlet through a cooling pipeline;
an air filtering mechanism is arranged on the first air inlet;
the air filtering mechanism comprises a filtering mechanism shell, the filtering mechanism shell sequentially comprises a first shell, a second shell and a third shell with circular ring-shaped sections from top to bottom, the first shell and the second shell and the third shell are respectively connected through an obliquely arranged adapter shell, the inner diameters of the first shell and the third shell are equal, and the inner diameter of the second shell is twice of the inner diameter of the first shell;
a flow distribution mechanism is arranged in the second shell, the flow distribution mechanism comprises a flow distribution block with a cylindrical structure, the upper end and the lower end of the flow distribution block are respectively provided with a flow guide block with a conical structure, the flow distribution block is coaxially arranged in the second shell, the outer wall of the flow distribution block is uniformly provided with a plurality of flow distribution plates, the flow distribution plates are detachably fixed on the inner wall of the second shell through screws, and the flow distribution plates divide the second shell into a plurality of filter cavities;
a first filtering component is arranged in the first shell and the third shell respectively, and a second filtering component is arranged in each filtering cavity in the second shell respectively.
2. A high efficiency two-stage compression air compressor machine as claimed in claim 1, wherein the cooling conduit includes a conduit body having a plurality of atomizer heads connected to an oil storage tank through a conduit, the oil storage tank being filled with lubricating oil.
3. A high efficiency, two stage compression air compressor machine as claimed in claim 2, wherein the atomising nozzles are inclined.
4. An efficient two-stage compression air compressor machine as claimed in claim 1 wherein the first stage compression chamber is further provided with an oil inlet for introducing lubricating oil into the first stage compression chamber.
5. A high efficiency two stage compression air compressor as claimed in claim 1, wherein the first filter assembly comprises a first frame formed of stainless steel mesh sheet, the first frame having filter cotton therein, the first frame being detachably fixed to the inner wall of the first casing or the third casing by screws.
6. A high efficiency two stage compression air compressor machine as claimed in claim 1 wherein the second filter assembly comprises a second frame comprised of stainless steel mesh sheet with activated carbon wrapped by non-woven fabric, the second frame being removably secured in the filter chamber of the second housing by screws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821493057.XU CN210068476U (en) | 2018-09-13 | 2018-09-13 | Efficient two-stage compression air compressor main engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821493057.XU CN210068476U (en) | 2018-09-13 | 2018-09-13 | Efficient two-stage compression air compressor main engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210068476U true CN210068476U (en) | 2020-02-14 |
Family
ID=69423836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821493057.XU Expired - Fee Related CN210068476U (en) | 2018-09-13 | 2018-09-13 | Efficient two-stage compression air compressor main engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210068476U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139467A (en) * | 2018-09-13 | 2019-01-04 | 镇江华印电路板有限公司 | A kind of efficient two stages of compression air compressor host |
-
2018
- 2018-09-13 CN CN201821493057.XU patent/CN210068476U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139467A (en) * | 2018-09-13 | 2019-01-04 | 镇江华印电路板有限公司 | A kind of efficient two stages of compression air compressor host |
| CN109139467B (en) * | 2018-09-13 | 2024-08-20 | 镇江华印电路板有限公司 | Efficient two-stage compression air compressor main machine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111365080B (en) | Natural gas static pressure air bearing two-stage expansion generator and power generation system | |
| WO2011099891A1 (en) | Turbocompressor power plant | |
| CN102322421B (en) | Vehicle-mounted oil-free screw air compressor and oil circuit self-circulation cooling method thereof | |
| CN109139467B (en) | Efficient two-stage compression air compressor main machine | |
| CN108150418B (en) | Two-stage screw compressor and compression method | |
| CN101451464A (en) | Fuel cell engine air turbine compressor with energy recovery | |
| CN210068476U (en) | Efficient two-stage compression air compressor main engine | |
| KR20130056856A (en) | A centrifugal compressor | |
| CN111734630A (en) | Take fuel cell roots formula air compressor machine of energy recuperation function | |
| CN112943608A (en) | Multistage large-traffic compressor | |
| JPH05149147A (en) | System and method for integrating combustion equipment-turbine and compressor | |
| CN202250855U (en) | Vehicle-mounted oil-free screw air compressor | |
| CN110792595A (en) | Cascade two-stage screw compressor | |
| US6672065B1 (en) | Multiple stage compressor with rotors using rollers | |
| CN209761720U (en) | large-displacement volume rotary compressor | |
| CN202628524U (en) | Frequency conversion control sliding-vane air compressor with clutch | |
| KR101578027B1 (en) | Compressor and energy saving system using the same | |
| CN206785637U (en) | A kind of inverter screw compressor | |
| CN111255685A (en) | Sliding vane type air compressor | |
| CN205895593U (en) | Helical -lobe compressor of two -stage compression | |
| CN115750353B (en) | Shielding multistage self-cooling compressor | |
| CN211874808U (en) | Inner duct axial flow type fluid compressor | |
| CN212536066U (en) | Dry-type screw blower | |
| CN213063956U (en) | Novel melt-blown fan | |
| CN214617031U (en) | Multistage large-traffic compressor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200214 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |