CN112392724B - Screw compressor displacement monitoring system - Google Patents
Screw compressor displacement monitoring system Download PDFInfo
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- CN112392724B CN112392724B CN202011367553.2A CN202011367553A CN112392724B CN 112392724 B CN112392724 B CN 112392724B CN 202011367553 A CN202011367553 A CN 202011367553A CN 112392724 B CN112392724 B CN 112392724B
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- screw compressor
- air inlet
- air outlet
- temperature sensor
- air
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 21
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 11
- 238000003745 diagnosis Methods 0.000 claims abstract description 6
- 238000004364 calculation method Methods 0.000 claims abstract description 5
- 230000006835 compression Effects 0.000 claims description 21
- 238000007906 compression Methods 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 2
- 230000009466 transformation Effects 0.000 claims 2
- 238000001514 detection method Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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
- F04C28/28—Safety arrangements; Monitoring
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The invention discloses an exhaust gas quantity monitoring system of a screw compressor, which comprises a controller, an air inlet temperature sensor, an air inlet pressure sensor, an exhaust gas temperature sensor and an exhaust gas pressure sensor. According to the invention, the technological parameters, the running/stopping state, fault diagnosis and the like of the screw compressor are monitored through the operation of the controller, the air inlet temperature sensor detects the air inlet end temperature of the screw compressor, the air inlet pressure sensor detects the air inlet end pressure of the screw compressor, the air outlet temperature sensor detects the air outlet end temperature of the screw compressor, the air outlet pressure sensor detects the air outlet end pressure of the screw compressor, and when the screw compressor runs, the controller calculates the air displacement of the screw compressor by using a unique calculation method and adding a fitted air displacement curve of the head of the screw compressor according to the detection data of the air inlet temperature sensor, the air inlet pressure sensor, the air outlet temperature sensor and the air outlet pressure sensor as important monitoring parameters.
Description
Technical Field
The invention relates to the related field of screw compressors, in particular to a screw compressor exhaust gas displacement monitoring system.
Background
The screw compressor is a mechanical device with very wide application, and has important application in the fields of machinery, metallurgy, spinning, food and the like; in the case of using a screw compressor, in addition to performance indexes such as temperature, pressure, current, etc. at the time of operation of the screw compressor, the displacement of the screw compressor is also becoming a focus of attention and concern for users. Meanwhile, the user pays attention to the displacement only needs to master the displacement general data, but not the delicate data, and does not need to invest too much funds.
In order to meet the requirement, a set of exhaust gas measuring device is added, the data measured by the device are precise, the investment cost of the exhaust gas measuring device is relatively large, meanwhile, the device is connected into an air inlet or exhaust system of the screw compressor in series, the implementation of auxiliary pipelines and the variation of the overall layout are increased, and the device system and a control system of the screw compressor are two systems which are not compatible in any way, and are slightly messy and uncoordinated in overall.
Disclosure of Invention
Accordingly, in order to solve the above-mentioned shortcomings, the present invention herein provides a screw compressor displacement monitoring system.
The invention is realized by constructing a screw compressor exhaust gas amount monitoring system, the device comprises a controller, an air inlet temperature sensor, an air inlet pressure sensor, an air outlet temperature sensor and an air outlet pressure sensor, wherein the controller is used for operating and monitoring and measuring the technological parameters, the running/stopping state and fault diagnosis of the screw compressor, the air inlet temperature sensor detects the air inlet end temperature of the screw compressor, the air inlet pressure sensor detects the air inlet end pressure of the screw compressor, the air outlet temperature sensor detects the air outlet end temperature of the screw compressor, the air outlet pressure sensor detects the air outlet end pressure of the screw compressor, the controller and the air inlet temperature sensor are connected with the air inlet pressure sensor, the air outlet temperature sensor and the air outlet pressure sensor, and the controller calculates the exhaust gas amount of the screw compressor as an important monitoring parameter by utilizing a unique calculation method and fitting a screw compressor head exhaust gas amount curve.
Preferably, the working mode is as follows:
s1, when the screw compressor operates, a controller collects data of an air inlet temperature sensor, an air inlet pressure sensor, an air outlet temperature sensor and an air outlet pressure sensor;
s2, converting the data of the air inlet temperature sensor and the air outlet temperature sensor into temperature absolute values and obtaining temperature proportion indexes, converting the data of the air inlet pressure sensor and the air outlet pressure sensor into pressure absolute values and obtaining pressure proportion indexes, obtaining compression ratio indexes of the screw compressor, obtaining compression ratio efficiency according to air isentropic coefficients, and obtaining compression specific energy according to air gas constants;
s3, the controller obtains the pneumatic power of the screw compressor according to the detected output power of the screw compressor and obtains the total power of the compression ratio by combining the efficiency of the compression ratio;
and S4, the controller can calculate the mass exhaust gas according to the total compression ratio power and the compression specific energy, deduce the gas density according to the inlet pressure temperature ratio and the air gas constant, and then convert the gas density into the volume exhaust gas.
The invention has the following advantages: the invention provides a screw compressor exhaust gas amount monitoring system through improvement, which is improved compared with the same type of equipment as follows:
according to the exhaust gas quantity monitoring system of the screw compressor, technological parameters, operation/stop states, fault diagnosis and the like of the screw compressor are monitored and measured through the operation of the controller, the air inlet temperature sensor detects the air inlet end temperature of the screw compressor, the air inlet pressure sensor detects the air inlet end pressure of the screw compressor, the exhaust temperature sensor detects the exhaust end temperature of the screw compressor, and the exhaust pressure sensor detects the exhaust end pressure of the screw compressor; when the screw compressor runs, the controller calculates the exhaust gas quantity of the screw compressor as an important monitoring parameter by utilizing a unique calculation method and adding a fitted screw compressor head exhaust gas quantity curve according to detection data of an air inlet temperature sensor, an air inlet pressure sensor, an air outlet temperature sensor and an air outlet pressure sensor.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a flow chart of a screw compressor displacement monitoring system in accordance with the present invention.
Wherein: a controller-11, an intake air temperature sensor-12, an intake air pressure sensor-13, an exhaust air temperature sensor-14, an exhaust air pressure sensor-15, and a screw compressor-16.
Detailed Description
The following detailed description of the present invention, taken in conjunction with fig. 1-2, clearly and completely describes the technical solutions of embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1, the invention provides a screw compressor exhaust gas amount monitoring system by improvement, comprising a controller 11, an air inlet temperature sensor 12, an air inlet pressure sensor 13, an exhaust gas temperature sensor 14 and an exhaust gas pressure sensor 15, wherein the controller 11 is used for operating and monitoring and measuring the technological parameters of the screw compressor 16, the operating/stopping state and fault diagnosis, the air inlet temperature sensor 12 detects the air inlet end temperature of the screw compressor 16, the air inlet pressure sensor 13 detects the air inlet end pressure of the screw compressor 16, the exhaust gas temperature sensor 14 detects the air outlet end temperature of the screw compressor 16, the exhaust gas pressure sensor 15 detects the air outlet end pressure of the screw compressor 16, and the controller 11 and the air inlet temperature sensor 12 are connected with the air inlet pressure sensor 13, the air outlet temperature sensor 14 and the exhaust gas pressure sensor 15.
As shown in fig. 2, the invention provides a screw compressor discharge monitoring system by improvement, which works as follows:
s1, when a screw compressor 16 is operated, a controller 11 collects data of an air inlet temperature sensor 12, an air inlet pressure sensor 13, an exhaust temperature sensor 14 and an exhaust pressure sensor 15;
s2, converting data of an air inlet temperature sensor 12 and an air outlet temperature sensor 14 into temperature absolute values to obtain temperature proportion indexes, converting data of an air inlet pressure sensor 13 and an air outlet pressure sensor 15 into pressure absolute values to obtain pressure proportion indexes, obtaining a compression ratio index of a screw compressor 16, obtaining compression ratio efficiency according to an air isentropic coefficient, and obtaining compression specific energy according to an air gas constant;
s3, the controller 11 obtains the pneumatic power of the screw compressor 16 according to the motor efficiency by utilizing the detected output power of the screw compressor 16, and obtains the total power of the compression ratio by combining the compression ratio efficiency;
and S4, the controller 11 can calculate the mass exhaust gas according to the total compression ratio power and the compression specific energy, deduce the gas density according to the inlet pressure temperature ratio and the air gas constant, and then convert the gas density into the volume exhaust gas.
According to the invention, by improving the exhaust gas amount monitoring system of the screw compressor, the process parameters, the running/stopping state, fault diagnosis and the like of the screw compressor 16 are monitored and measured through the operation of the controller 11, the air inlet temperature sensor 12 detects the air inlet end temperature of the screw compressor 16, the air inlet pressure sensor 13 detects the air inlet end pressure of the screw compressor 16, the exhaust gas temperature sensor 14 detects the air outlet end temperature of the screw compressor 16, and the exhaust gas pressure sensor 15 detects the air outlet end pressure of the screw compressor 16; when the screw compressor 16 is operated, the controller 11 calculates the exhaust gas quantity of the screw compressor 16 as an important monitoring parameter by adding a fitted head exhaust gas quantity curve of the screw compressor 16 by a unique calculation method according to detection data of the intake air temperature sensor 12 and the intake air pressure sensor 13 and the exhaust air temperature sensor 14 and the exhaust air pressure sensor 15.
The basic principle and main characteristics of the invention and the advantages of the invention are shown and described above, standard parts used by the invention can be purchased from market, special-shaped parts can be customized according to the description of the specification and the drawings, the specific connection modes of the parts adopt conventional means such as mature bolt rivets and welding in the prior art, the machinery, the parts and the equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection modes in the prior art, so that the description is omitted.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (1)
1. A screw compressor displacement monitoring system, characterized by: the system comprises a controller (11), an air inlet temperature sensor (12), an air inlet pressure sensor (13), an air outlet temperature sensor (14) and an air outlet pressure sensor (15), wherein the controller (11) is used for operating, monitoring and measuring process parameters, running/stopping states and fault diagnosis of a screw compressor (16), the air inlet temperature sensor (12) detects the air inlet end temperature of the screw compressor (16), the air inlet pressure sensor (13) detects the air inlet end pressure of the screw compressor (16), the air outlet temperature sensor (14) detects the air outlet end temperature of the screw compressor (16), the air outlet pressure sensor (15) detects the air outlet end pressure of the screw compressor (16), the controller (11) and the air inlet temperature sensor (12) are connected with the air outlet temperature sensor (14) and the air outlet pressure sensor (15), and the controller (11) utilizes a unique calculation method for fitting the air outlet pressure of the screw compressor (16) according to the detected data of the air inlet temperature sensor (12) and the air inlet pressure sensor (13) and the air outlet temperature sensor (14) and the air outlet pressure sensor (15) to calculate the air outlet pressure of the screw compressor (16) as important parameters; the working mode of the screw compressor exhaust gas quantity monitoring system is as follows: s1, when the screw compressor (16) operates, a controller (11) collects data of an air inlet temperature sensor (12), an air inlet pressure sensor (13), an air outlet temperature sensor (14) and an air outlet pressure sensor (15); s2, converting the data of the air inlet temperature sensor (12) and the air outlet temperature sensor (14) into temperature absolute values and obtaining temperature proportion indexes, converting the data of the air inlet pressure sensor (13) and the air outlet pressure sensor (15) into pressure absolute values and obtaining pressure proportion indexes, obtaining compression ratio indexes of the screw compressor (16), obtaining compression ratio efficiency according to air isentropic coefficients, and obtaining compression specific energy according to air gas constants; s3, the controller (11) obtains the pneumatic power of the screw compressor (16) according to the motor efficiency by utilizing the detected output power of the screw compressor (16), and obtains the total power of the compression transformation ratio by combining the compression transformation ratio efficiency; and S4, the controller (11) can calculate the mass exhaust gas according to the total compression ratio power and the compression specific energy, deduce the gas density according to the inlet pressure temperature ratio and the air gas constant, and then convert the gas density into the volume exhaust gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011367553.2A CN112392724B (en) | 2020-11-27 | 2020-11-27 | Screw compressor displacement monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011367553.2A CN112392724B (en) | 2020-11-27 | 2020-11-27 | Screw compressor displacement monitoring system |
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| Publication Number | Publication Date |
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| CN112392724A CN112392724A (en) | 2021-02-23 |
| CN112392724B true CN112392724B (en) | 2023-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011367553.2A Active CN112392724B (en) | 2020-11-27 | 2020-11-27 | Screw compressor displacement monitoring system |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1563722A (en) * | 2004-03-18 | 2005-01-12 | 西安交通大学 | Control method for exhaust temp of oil spraying rotary compressor |
| CN211692833U (en) * | 2020-02-21 | 2020-10-16 | 上海优耐特斯压缩机有限公司 | Oil control system of oil injection screw compression main engine |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5870078A (en) * | 1981-10-21 | 1983-04-26 | Hitachi Ltd | Supervising apparatus for screw compressor |
| CN108331757A (en) * | 2018-02-11 | 2018-07-27 | 好米动力设备有限公司 | A kind of performance test experiment table for single screw compressor |
-
2020
- 2020-11-27 CN CN202011367553.2A patent/CN112392724B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1563722A (en) * | 2004-03-18 | 2005-01-12 | 西安交通大学 | Control method for exhaust temp of oil spraying rotary compressor |
| CN211692833U (en) * | 2020-02-21 | 2020-10-16 | 上海优耐特斯压缩机有限公司 | Oil control system of oil injection screw compression main engine |
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| CN112392724A (en) | 2021-02-23 |
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Application publication date: 20210223 Assignee: SHANGHAI GLOBE SCREW TECHNOLOGY Co.,Ltd. Assignor: SHANGHAI SCREW COMPRESSOR Co.,Ltd. Contract record no.: X2024980020223 Denomination of invention: A monitoring system for displacement of screw compressor Granted publication date: 20230428 License type: Common License Record date: 20241025 |