CN110578690A - Interstage pressure adjusting structure of two-stage screw air compressor - Google Patents
Interstage pressure adjusting structure of two-stage screw air compressor Download PDFInfo
- Publication number
- CN110578690A CN110578690A CN201910997504.8A CN201910997504A CN110578690A CN 110578690 A CN110578690 A CN 110578690A CN 201910997504 A CN201910997504 A CN 201910997504A CN 110578690 A CN110578690 A CN 110578690A
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- China
- Prior art keywords
- stage
- main machine
- air compressor
- valve plate
- stage main
- Prior art date
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- 238000007906 compression Methods 0.000 claims abstract description 19
- 230000006835 compression Effects 0.000 claims abstract description 18
- 230000001105 regulatory effect Effects 0.000 claims abstract description 9
- 238000000926 separation method Methods 0.000 abstract description 5
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
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- 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
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- 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
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/02—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids specially adapted for several pumps connected in series or in parallel
-
- 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
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/24—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
- F04C28/26—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves using bypass channels
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
the invention provides an interstage pressure regulating structure of a two-stage screw air compressor, which can change the interstage pressure (also called the exhaust pressure of a primary main machine) by regulating the air suction quantity of a secondary main machine, improve the load of a rotor of the primary main machine and further eliminate the noise and vibration generated by the primary main machine under the unloading working condition. The air compressor is provided with a first-stage main machine, a second-stage main machine and an oil separation barrel along the air flowing direction, wherein a rotor of the first-stage main machine is connected with a rotor of the second-stage main machine through a connecting structure, a compression cavity of the second-stage main machine is communicated with an air suction cavity of the second-stage main machine through a bypass flow channel, a valve plate is pressed on the bypass flow channel and a backflow connecting port of the compression cavity of the second-stage main machine, and the valve plate is installed on a.
Description
Technical Field
The invention relates to the technical field of compressors, in particular to an interstage pressure regulating structure of a two-stage screw air compressor.
Background
The screw air compressor generally has a single-stage or multi-stage compression structure according to different compression characteristics, wherein the multi-stage compression mainly adopts two-stage compression, and the two-stage compression process is closer to isothermal compression, so that theoretically, compared with the single-stage compression, the screw air compressor is more energy-saving, and therefore, the screw air compressor is more and more widely applied.
When the two-stage screw air compressor operates, loading or unloading adjustment needs to be carried out according to the characteristics of load, when the two-stage screw air compressor is under the unloading working condition, the stress of a first-stage main machine rotor and a bearing can be obviously changed, the first-stage main machine rotor and the bearing are in a light-load state, the instability of the screw rotor is easily caused, the noise vibration is increased, the service life of the bearing can be shortened, the product quality is obviously influenced, the stress of the first-stage main machine rotor needs to be further optimized, and the noise and the vibration generated in the unloading process of the compressor are reduced.
disclosure of Invention
Aiming at the defect that the rotor of a first-stage main machine is easy to be unstable under the unloading working condition of the two-stage screw air compressor, so that noise and vibration are caused, the invention provides the interstage pressure regulating structure of the two-stage screw air compressor, which can change interstage pressure (also called as the exhaust pressure of the first-stage main machine) by regulating the air suction quantity of a second-stage main machine, and improve the load of the rotor of the first-stage main machine, so that the noise and vibration generated by the first-stage main machine under the unloading working condition are eliminated.
The invention provides the following technical scheme:
the utility model provides a two-stage screw air compressor's interstage pressure control structure, its along the air flow direction be provided with first order host computer, second level host computer and oil branch bucket, wherein first order host computer rotor and second level host computer rotor pass through connection structure and link to each other its characterized in that: the second-stage host compression cavity and the second-stage host suction cavity are communicated through a bypass flow channel, a valve plate is pressed on a backflow connecting port of the second-stage host compression cavity through the bypass flow channel, and the valve plate is installed on the movable structure.
It is further characterized in that:
The movable structure comprises a valve rod, the valve plate is mounted at one end of the valve rod, the valve rod penetrates through a flange, the other end of the valve rod is mounted on a piston, the piston is mounted on a hydraulic cylinder, the hydraulic cylinder is driven by oil pressure or air pressure, the flange is mounted on the second-stage host through a positioning pin, and the hydraulic cylinder is mounted on the flange through the positioning pin;
The rear end of the hydraulic cylinder is provided with a loading connecting port, the front end of the hydraulic cylinder is provided with an unloading connecting port, and the loading connecting port and the unloading connecting port are respectively communicated with the oil drum and the first-stage main engine air suction cavity through two-position four-way electromagnetic valves;
The backflow connecting port is provided with a guide post, the valve plate is provided with a guide hole, and the guide hole penetrates through the guide post.
Compared with the prior art, the invention has the following beneficial effects:
The invention adopts the bypass flow channel and the valve plate to adjust the interstage pressure of the two-stage screw compressor, when unloading, the valve plate is opened, the compressed gas in the compression cavity of the second-stage main machine flows into the suction cavity of the second-stage main machine through the bypass flow channel, thus realizing the function of reducing the suction volume of the second-stage main machine, achieving the purposes of adjusting the interstage pressure (the discharge pressure of the first-stage main machine) and weakening or even eliminating the noise and vibration of the rotor of the first-stage main machine caused by light load instability;
The loading connector is connected with the oil separation barrel, when the unloading connector is connected with the first-stage host air suction cavity, the valve plate is in a closed state, when the compressor needs to be unloaded, the two-position four-way solenoid valve changes to be in an electric state, the loading connector is connected with the first-stage host air suction cavity, the unloading connector is connected with the oil separation barrel, the valve plate is in an open state, compressed air in the second-stage host compression cavity flows into the second-stage host air suction cavity through the bypass flow channel, the purpose of reducing the air suction quantity of the second-stage host is achieved, the interstage pressure is improved, and the vibration of the first-stage host rotor, which is caused by light load instability.
drawings
FIG. 1 is a schematic sectional elevation view of a compressor in accordance with the present invention;
FIG. 2 is a front sectional perspective view of a second level mainframe of the present invention;
FIG. 3 is a schematic view of the gas circuit of the present invention;
In the figure: 1, a first-level host; 11 a first-stage main engine air suction cavity; 12 a first stage main engine rotor; 2 a second level host; 21 a second-stage host air suction cavity; 22 a second stage main machine rotor; 23 a second stage main engine compression chamber; 3, separating oil into barrels; 4, a connecting structure; 5, bypassing the flow channel; a 51 return connection port; 52 a guide post; 6 a valve plate; 61, a guide hole; 7 moving the structure; 71 a valve stem; 72 a flange; 73 a piston; 74 hydraulic cylinders; 741 loading connection port; 742 unloading the connection port; 743 two-position four-way solenoid valve; and 75, positioning pins.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an interstage pressure regulating structure of a two-stage screw air compressor is provided with a first-stage main unit 1, a second-stage main unit 2 and an oil content barrel 3 along an air flowing direction, wherein a first-stage main unit rotor 12 and a second-stage main unit rotor 22 are connected through a connecting structure 4, a second-stage main unit compression cavity 23 and a second-stage main unit suction cavity 21 are communicated through a bypass flow channel 5, a valve plate 6 is pressed on the bypass flow channel 5 and a backflow connecting port 51 of the second-stage main unit compression cavity 23, a guide post 52 is installed at the backflow connecting port 51, a guide hole 61 is formed in the valve plate 6, and the guide hole 61 penetrates through the guide post 52. The valve plate 6 is mounted on the moving structure 7, the moving structure 7 includes a valve rod 71, the valve plate 6 is mounted at one end of the valve rod 71, the valve rod 71 passes through a flange 72, the other end of the valve rod is mounted on a piston 73, the piston 73 is mounted on a hydraulic cylinder 74, the hydraulic cylinder 74 is driven by oil pressure and air pressure, the flange 72 is mounted on the second-stage main machine 2 through a positioning pin 75, the hydraulic cylinder 74 is mounted on the flange 72 through the positioning pin 75, a loading connecting port 741 is formed at the rear end of the hydraulic cylinder 74, an unloading connecting port 742 is formed at the front end of the hydraulic cylinder 74, and the loading connecting port 741 and the unloading connecting.
According to the invention, the interstage pressure of the two-stage screw compressor is adjusted by adopting the bypass flow channel 5 and the valve plate 6, the loading connecting port 741 is connected with the oil separation barrel 3, the unloading connecting port 742 is connected with the first-stage main engine air suction cavity 11, the valve plate 6 is in a closed state, when the compressor needs to be unloaded, the two-position four-way electromagnetic valve 743 is changed into an electric state, the loading connecting port 741 is connected with the first-stage main engine air suction cavity 11, the unloading connecting port 742 is connected with the oil separation barrel 3, the valve plate 6 is in an open state, and compressed gas in the second-stage main engine compression cavity 23 flows into the second-stage main engine air suction cavity 21 through the bypass flow channel 5, so that the function of reducing the air suction volume of the second-stage main engine 2 is realized, the interstage pressure (the exhaust pressure of the first-stage main engine 1.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. The utility model provides a two-stage screw air compressor's interstage pressure control structure, its along the air flow direction be provided with first order host computer, second level host computer and oil branch bucket, wherein first order host computer rotor and second level host computer rotor pass through connection structure and link to each other its characterized in that: the second-stage host compression cavity and the second-stage host suction cavity are communicated through a bypass flow channel, a valve plate is pressed on a backflow connecting port of the second-stage host compression cavity through the bypass flow channel, and the valve plate is installed on the movable structure.
2. The interstage pressure regulating structure of a two-stage screw air compressor according to claim 1, wherein: the movable structure comprises a valve rod, the valve plate is installed at one end of the valve rod, the valve rod penetrates through the flange, the other end of the valve rod is installed on the piston, the piston is installed on the hydraulic cylinder, the hydraulic cylinder is driven through oil pressure or air pressure, the flange is installed on the second-stage host through a positioning pin, and the hydraulic cylinder is installed on the flange through the positioning pin.
3. the interstage pressure regulating structure of a two-stage screw air compressor according to claim 2, wherein: the rear end of the hydraulic cylinder is provided with a loading connector, the front end of the hydraulic cylinder is provided with an unloading connector, and the loading connector and the unloading connector are respectively communicated with the oil sub-barrel and the first-stage main engine air suction cavity through two-position four-way solenoid valves.
4. the interstage pressure regulating structure of a two-stage screw air compressor according to claim 1, wherein: the backflow connecting port is provided with a guide post, the valve plate is provided with a guide hole, and the guide hole penetrates through the guide post.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910997504.8A CN110578690B (en) | 2019-10-21 | 2019-10-21 | Interstage pressure regulating structure of two-stage screw air compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910997504.8A CN110578690B (en) | 2019-10-21 | 2019-10-21 | Interstage pressure regulating structure of two-stage screw air compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110578690A true CN110578690A (en) | 2019-12-17 |
| CN110578690B CN110578690B (en) | 2024-10-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910997504.8A Active CN110578690B (en) | 2019-10-21 | 2019-10-21 | Interstage pressure regulating structure of two-stage screw air compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110578690B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111878403A (en) * | 2020-08-24 | 2020-11-03 | 珠海格力电器股份有限公司 | Compressor air supplementing mechanism, compressor and compressor air supplementing method |
| WO2023040643A1 (en) * | 2021-09-18 | 2023-03-23 | 江森自控空调冷冻设备(无锡)有限公司 | Compressor |
Citations (10)
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|---|---|---|---|---|
| GB9825737D0 (en) * | 1997-11-26 | 1999-01-20 | Kobe Steel Ltd | Two-stage screw compressor |
| JPH1193875A (en) * | 1997-07-25 | 1999-04-06 | Kobe Steel Ltd | Two-stage oil-cooled screw compressor |
| JP2000054977A (en) * | 1998-08-07 | 2000-02-22 | Kobe Steel Ltd | Intermediate-stage pressure control method for screw compressor |
| US20020001523A1 (en) * | 2000-06-30 | 2002-01-03 | Seiji Tsuru | Air compressor and method of operating the same |
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| CN210769318U (en) * | 2019-10-21 | 2020-06-16 | 无锡锡压压缩机有限公司 | Interstage pressure adjusting structure of two-stage screw air compressor |
-
2019
- 2019-10-21 CN CN201910997504.8A patent/CN110578690B/en active Active
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| JPH1193875A (en) * | 1997-07-25 | 1999-04-06 | Kobe Steel Ltd | Two-stage oil-cooled screw compressor |
| GB9825737D0 (en) * | 1997-11-26 | 1999-01-20 | Kobe Steel Ltd | Two-stage screw compressor |
| JP2000054977A (en) * | 1998-08-07 | 2000-02-22 | Kobe Steel Ltd | Intermediate-stage pressure control method for screw compressor |
| US20020001523A1 (en) * | 2000-06-30 | 2002-01-03 | Seiji Tsuru | Air compressor and method of operating the same |
| JP2002266782A (en) * | 2001-03-07 | 2002-09-18 | Kobe Steel Ltd | Screw refrigerating machine |
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| 曾宪涛: "日本神户制钢所螺杆压缩机系列产品", 压缩机技术, no. 06, 30 December 1993 (1993-12-30) * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111878403A (en) * | 2020-08-24 | 2020-11-03 | 珠海格力电器股份有限公司 | Compressor air supplementing mechanism, compressor and compressor air supplementing method |
| CN111878403B (en) * | 2020-08-24 | 2024-04-23 | 珠海格力电器股份有限公司 | Compressor air supplementing mechanism, compressor and compressor air supplementing method |
| WO2023040643A1 (en) * | 2021-09-18 | 2023-03-23 | 江森自控空调冷冻设备(无锡)有限公司 | Compressor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110578690B (en) | 2024-10-29 |
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