CN113803252A - Dry-type oil-free screw compressor and operation method thereof - Google Patents
Dry-type oil-free screw compressor and operation method thereof Download PDFInfo
- Publication number
- CN113803252A CN113803252A CN202111222366.XA CN202111222366A CN113803252A CN 113803252 A CN113803252 A CN 113803252A CN 202111222366 A CN202111222366 A CN 202111222366A CN 113803252 A CN113803252 A CN 113803252A
- Authority
- CN
- China
- Prior art keywords
- rotor
- male rotor
- female rotor
- female
- male
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 10
- 230000001360 synchronised effect Effects 0.000 claims abstract description 16
- 238000007789 sealing Methods 0.000 abstract 2
- 238000006073 displacement reaction Methods 0.000 description 5
- 238000007792 addition Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
Images
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
-
- 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
- F04C29/0042—Driving elements, brakes, couplings, transmissions specially adapted for pumps
- F04C29/005—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
-
- 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
- F04C29/06—Silencing
-
- 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
- F04C2240/00—Components
- F04C2240/20—Rotors
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The invention relates to a dry type oil-free screw compressor and an operation method thereof. The dry oil-free screw compressor comprises a male rotor, a female rotor, a shell, an input shaft, a bearing, a sealing assembly and a synchronous gear, wherein the shell is provided with an exhaust end and an air inlet cover plate, the male rotor and the female rotor are arranged in the shell through the bearing, the two ends of the male rotor and the two ends of the female rotor are respectively provided with the sealing assembly, and the dry oil-free screw compressor is structurally characterized in that: the input shaft and the female rotor are fixed, the male rotor and the female rotor are not in contact meshing with each other, and the male rotor and the female rotor are connected through a synchronous gear to keep a gap between a tooth surface of the male rotor and a tooth surface of the female rotor constant; the tooth profiles of the male rotor and the female rotor are 3/5 teeth or 4/6 teeth, and the wrap angle of the male rotor is larger than 300 degrees. The invention has reasonable structural design, low noise and safe and reliable performance.
Description
Technical Field
The invention relates to a dry type oil-free screw compressor and an operation method thereof, belonging to the technical field of compressors.
Background
With the continuous strengthening of the state on the environmental protection management, the dry-type oil-free screw compressor is more and more widely applied, and is particularly applied to the industries of textile, sewage treatment and the like.
Although the conventional dry-type oil-free screw compressor is also applied at present, the following problems mainly exist:
the length-diameter ratio of the screw is too small, generally less than 2.0, so that the air displacement needs to be increased, the rotating speed of the screw needs to be increased, and the reliability is reduced and the operation noise is increased;
secondly, the wrap angle of the male rotor is generally less than 300 degrees, which causes the noise of the air suction port of the compressor to be large, the air suction port is not closed or is just closed while exhausting, and the risk of leakage from the gap of the exhaust end to the air suction port is increased.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a dry oil-free screw compressor with reasonable structural design, low noise and safe and reliable performance and an operation method thereof.
The technical scheme adopted by the invention for solving the problems is as follows: this dry-type does not have oily screw compressor includes positive rotor, cloudy rotor, casing, input shaft, bearing, seal assembly and synchronous gear, be provided with exhaust end and air inlet cover plate on the casing, positive rotor and cloudy rotor pass through the bearing and install in the casing, the both ends of positive rotor and the both ends of cloudy rotor all are provided with seal assembly, and its structural feature lies in: the input shaft and the female rotor are fixed, the male rotor and the female rotor are not in contact meshing with each other, and the male rotor and the female rotor are connected through a synchronous gear to keep a gap between a tooth surface of the male rotor and a tooth surface of the female rotor constant; the tooth profiles of the male rotor and the female rotor are 3/5 teeth or 4/6 teeth, and the wrap angle of the male rotor is larger than 300 degrees.
Preferably, the synchronizing gear of the present invention is located at the exhaust end of the housing.
Preferably, the ratio between the length L of the profile section of the male rotor according to the invention and the diameter D of the outer circumference of the male rotor is greater than 2.0.
Preferably, the compressor discharge pressure of the present invention does not exceed 1.5bar gauge.
Preferably, the screw sections of the male and female rotors of the invention are coated on the surface, or uncoated on the surface.
Preferably, the exhaust end and the air inlet cover plate are respectively positioned at two ends of the shell.
The operation method of the dry oil-free screw compressor is characterized in that: the operation method comprises the following steps: the external driving force drives the input shaft to rotate, the male rotor and the female rotor realize synchronous rotation under the action of the synchronous gear, the male rotor and the female rotor are not in contact and meshed with each other, and the gap between the tooth surface of the male rotor and the tooth surface of the female rotor is kept unchanged; air to be compressed enters the shell from the air inlet cover plate, the air is compressed through synchronous rotation of the male rotor and the female rotor, and the compressed air is discharged from the air outlet end of the shell.
Compared with the prior art, the invention has the following advantages and effects: by improving the length-diameter ratio of the rotor, increasing the length of the screw rotor and improving the theoretical displacement of unit rotating speed, the larger displacement is realized and the reliability of the operation of the compressor is improved under the condition of keeping low rotating speed; meanwhile, the wrap angle of the male rotor is increased, a larger internal pressure ratio can be realized, exhaust leakage of an air suction port is reduced, and noise of an air inlet of the compressor is reduced.
Drawings
In order to more clearly illustrate the embodiments and/or technical solutions of the present invention, the drawings used in the description of the embodiments and/or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural view of a dry oil-free screw compressor in an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.
Examples are given.
Referring to fig. 1, the dry type oil-free screw compressor in the present embodiment includes a male rotor 1, a female rotor 2, a housing 3, an input shaft 5, a bearing 7, a seal assembly 8, and a synchronizing gear 9, wherein the housing 3 is provided with a discharge end 4 and an intake cover plate 6, and the discharge end 4 and the intake cover plate 6 are respectively located at both ends of the housing 3.
The male rotor 1 and the female rotor 2 in this embodiment are mounted in the housing 3 through bearings 7, both ends of the male rotor 1 and both ends of the female rotor 2 are provided with seal assemblies 8, the input shaft 5 and the female rotor 2 are fixed, the male rotor 1 and the female rotor 2 are not in contact engagement with each other, and the male rotor 1 and the female rotor 2 are connected through a synchronizing gear 9 to keep a gap between a tooth surface of the male rotor 1 and a tooth surface of the female rotor 2 constant.
The tooth forms of the male rotor 1 and the female rotor 2 in the embodiment are 3/5 teeth or 4/6 teeth, the wrap angle of the male rotor 1 is more than 300 degrees, and the ratio of the length L of the profile line part of the male rotor 1 to the diameter D of the outer circle of the male rotor 1 is more than 2.0.
The synchronous gear 9 in the embodiment is positioned at the exhaust end 4 of the shell 3, the exhaust pressure of the compressor does not exceed 1.5bar gauge pressure, and the screw sections of the male rotor 1 and the female rotor 2 can be coated on the surface or not coated on the surface.
The operation method of the dry oil-free screw compressor in the embodiment comprises the following steps: an external driving force drives the input shaft 5 to rotate, and under the action of the synchronous gear 9, the male rotor 1 and the female rotor 2 realize synchronous rotation, the male rotor 1 and the female rotor 2 are not in contact meshing with each other, and the gap between the tooth surface of the male rotor 1 and the tooth surface of the female rotor 2 is kept unchanged; air to be compressed enters the shell 3 from the air inlet cover plate 6, the air is compressed through the synchronous rotation of the male rotor 1 and the female rotor 2, and the compressed air is discharged from the air outlet end 4 of the shell 3. By improving the length-diameter ratio of the rotor, increasing the length of the screw rotor and improving the theoretical displacement of unit rotating speed, the larger displacement is realized and the reliability of the operation of the compressor is improved under the condition of keeping low rotating speed; meanwhile, the wrap angle of the male rotor 1 is increased, a larger internal pressure ratio can be realized, exhaust leakage of an air suction port is reduced, and noise of an air inlet of the compressor is reduced.
In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above description is only an illustration of the structure of the present invention. Equivalent or simple changes in the structure, characteristics and principles of the invention are included in the protection scope of the patent. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (7)
1. The utility model provides a dry-type does not have oily screw compressor, includes male rotor (1), female rotor (2), casing (3), input shaft (5), bearing (7), seal assembly (8) and synchronous gear (9), be provided with exhaust end (4) and air inlet cover plate (6) on casing (3), male rotor (1) and female rotor (2) are installed in casing (3) through bearing (7), the both ends of male rotor (1) and the both ends of female rotor (2) all are provided with seal assembly (8), its characterized in that: the input shaft (5) and the female rotor (2) are fixed, the male rotor (1) and the female rotor (2) are not in contact meshing with each other, and the male rotor (1) and the female rotor (2) are connected through a synchronous gear (9) to keep a gap between a tooth surface of the male rotor (1) and a tooth surface of the female rotor (2) constant; the tooth profiles of the male rotor (1) and the female rotor (2) are 3/5 teeth or 4/6 teeth, and the wrap angle of the male rotor (1) is larger than 300 degrees.
2. A dry oil-free screw compressor as claimed in claim 1, wherein: the synchronizing gear (9) is located at the exhaust end (4) of the housing (3).
3. A dry oil-free screw compressor as claimed in claim 1, wherein: the ratio of the length L of the molded line part of the male rotor (1) to the diameter D of the outer circle of the male rotor (1) is larger than 2.0.
4. A dry oil-free screw compressor as claimed in claim 1, wherein: the compressor discharge pressure does not exceed 1.5bar gauge pressure.
5. A dry oil-free screw compressor as claimed in claim 1, wherein: the screw sections of the male rotor (1) and the female rotor (2) are coated on the surface or not coated on the surface.
6. A dry oil-free screw compressor as claimed in claim 1, wherein: the exhaust end (4) and the air inlet cover plate (6) are respectively positioned at two ends of the shell (3).
7. A method of operating a dry oil-free screw compressor according to any one of claims 1 to 6, wherein: the operation method comprises the following steps: an external driving force drives an input shaft (5) to rotate, under the action of a synchronous gear (9), a male rotor (1) and a female rotor (2) realize synchronous rotation, the male rotor (1) and the female rotor (2) are not in contact meshing with each other, and a gap between the tooth surface of the male rotor (1) and the tooth surface of the female rotor (2) is kept unchanged; air to be compressed enters the shell (3) from the air inlet cover plate (6), the air is compressed through the synchronous rotation of the male rotor (1) and the female rotor (2), and the compressed air is discharged from the air outlet end (4) of the shell (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111222366.XA CN113803252A (en) | 2021-10-20 | 2021-10-20 | Dry-type oil-free screw compressor and operation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111222366.XA CN113803252A (en) | 2021-10-20 | 2021-10-20 | Dry-type oil-free screw compressor and operation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113803252A true CN113803252A (en) | 2021-12-17 |
Family
ID=78937627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111222366.XA Pending CN113803252A (en) | 2021-10-20 | 2021-10-20 | Dry-type oil-free screw compressor and operation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113803252A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE1010145A6 (en) * | 1996-04-16 | 1998-01-06 | Atlas Copco Airpower Nv | Compressor unit |
| CN102022336A (en) * | 2010-12-27 | 2011-04-20 | 上海耐浦流体机械科技有限公司 | Rotor profiles of oil-free screw compressors |
| CN202867198U (en) * | 2012-11-07 | 2013-04-10 | 王俊杰 | Low-pressure oil-injection screw compressor |
| CN203335398U (en) * | 2013-06-26 | 2013-12-11 | 上海申行健压缩机有限公司 | High-efficiency screw compressor |
| CN205858690U (en) * | 2016-07-04 | 2017-01-04 | 武汉新世界制冷工业有限公司 | Oil free screw rotor with synchromesh gear |
| CN207111419U (en) * | 2017-06-16 | 2018-03-16 | 上海汉钟精机股份有限公司 | Water jet oil free screw compressor |
| CN108884832A (en) * | 2016-04-19 | 2018-11-23 | 株式会社日立产机*** | Oil-cooled type screw compressor |
-
2021
- 2021-10-20 CN CN202111222366.XA patent/CN113803252A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE1010145A6 (en) * | 1996-04-16 | 1998-01-06 | Atlas Copco Airpower Nv | Compressor unit |
| CN102022336A (en) * | 2010-12-27 | 2011-04-20 | 上海耐浦流体机械科技有限公司 | Rotor profiles of oil-free screw compressors |
| CN202867198U (en) * | 2012-11-07 | 2013-04-10 | 王俊杰 | Low-pressure oil-injection screw compressor |
| CN203335398U (en) * | 2013-06-26 | 2013-12-11 | 上海申行健压缩机有限公司 | High-efficiency screw compressor |
| CN108884832A (en) * | 2016-04-19 | 2018-11-23 | 株式会社日立产机*** | Oil-cooled type screw compressor |
| CN205858690U (en) * | 2016-07-04 | 2017-01-04 | 武汉新世界制冷工业有限公司 | Oil free screw rotor with synchromesh gear |
| CN207111419U (en) * | 2017-06-16 | 2018-03-16 | 上海汉钟精机股份有限公司 | Water jet oil free screw compressor |
Non-Patent Citations (1)
| Title |
|---|
| 七0四研究所: "《国外螺杆压缩机》", 科学技术文献出版社, pages: 194 - 197 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2019148954A1 (en) | Multi-stage roots dry vacuum pump | |
| WO2000077419A1 (en) | A gear and a fluid machine with a pair of gears | |
| CN107939681B (en) | Full-meshing variable-wall-thickness vortex vacuum pump | |
| CN113803252A (en) | Dry-type oil-free screw compressor and operation method thereof | |
| CN102926995B (en) | Bi-rotor claw-type high current pump | |
| JP4839443B2 (en) | Screw vacuum pump | |
| CN113586449B (en) | Rotor of variable-rotor type linear double-screw compressor and design method | |
| CN219733635U (en) | Roots vacuum pump | |
| CN215256795U (en) | Rotor subassembly, compressor and air conditioner | |
| CN111734632B (en) | Double-screw rotor set and vacuum pump | |
| CN207454258U (en) | A kind of air compressor of monodentate engagement positive displacement structure | |
| CN220956044U (en) | High-efficiency energy-saving screw vacuum pump | |
| CN214617037U (en) | Micro-oil screw vacuum pump | |
| CN218991877U (en) | Sealing structure of large pumping speed Roots pump | |
| CN210769302U (en) | Energy-saving screw dry vacuum pump | |
| CN218991876U (en) | Sliding bearing with composite function for screw compressor | |
| CN114992122B (en) | Method for reducing meshing gap of screw rotor | |
| CN110107501A (en) | A kind of screw compressor with impeller system | |
| CN210050032U (en) | Oil-free screw structure | |
| CN207454274U (en) | A kind of stator of the air compressor of monodentate engagement positive displacement structure | |
| CN212376872U (en) | Vacuum pump with multistage roots structure for oil gas recovery | |
| CN211009080U (en) | High-speed high-pressure three-blade Roots blower | |
| CN204126893U (en) | Air condition compressor | |
| CN214837113U (en) | High-efficient screw compressor who makes an uproar that falls | |
| CN207454257U (en) | A kind of rotor of the air compressor of monodentate engagement positive displacement structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211217 |
|
| RJ01 | Rejection of invention patent application after publication |