CN107327396B - Double-feedback control system and control method of air compressor unit - Google Patents
Double-feedback control system and control method of air compressor unit Download PDFInfo
- Publication number
- CN107327396B CN107327396B CN201710755071.6A CN201710755071A CN107327396B CN 107327396 B CN107327396 B CN 107327396B CN 201710755071 A CN201710755071 A CN 201710755071A CN 107327396 B CN107327396 B CN 107327396B
- Authority
- CN
- China
- Prior art keywords
- pressure
- low
- compressor unit
- flow
- pipeline
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000009826 distribution Methods 0.000 claims abstract description 16
- 230000001939 inductive effect Effects 0.000 claims abstract description 7
- 230000001276 controlling effect Effects 0.000 claims abstract description 4
- 229910004682 ON-OFF Inorganic materials 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 description 4
- 238000005553 drilling Methods 0.000 description 3
- 230000001105 regulatory Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002035 prolonged Effects 0.000 description 1
- 238000004088 simulation Methods 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
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B23/00—Pumping installations or systems
- F04B23/04—Combinations of two or more pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
Abstract
The invention discloses a double feedback control system of an air compressor unit, which comprises a small compressor unit for providing low-pressure air, a low-pressure pipeline from the small compressor unit to a low-pressure air user, a large compressor unit for providing high-pressure air, and a high-pressure pipeline from the large compressor unit to the high-pressure air user, wherein an intercommunicating pipeline and a flow distribution valve for controlling the on-off of the intercommunicating pipeline are arranged between the low-pressure pipeline and the high-pressure pipeline; and a flow controller and a pressure controller. The control method realizes the combined regulation and control function through a linkage induction control circuit between the flow controller and the pressure controller. The invention has linkage control, does not need much manual work, can be used by different compressed air users, and has high air supply efficiency and low power consumption.
Description
Technical Field
The invention relates to a technique for preparing and distributing compressed air.
Background
The working principle of the air compressor is as follows: after the driving motor is started, the crankshaft of the compressor is driven to rotate through the conveying belt and is converted into a piston to reciprocate in the cylinder through the crank rod mechanism. The outside air enters the cylinder through the filter and the air suction valve, the air in the cylinder is raised by the compression pressure, and the compressed air enters the air storage tank through the pipeline, so that the required compressed air is obtained.
The invention with the patent application number of 201310661533X provides an air pressure control method and a system of a drilling machine air compressor, wherein the air pressure of the drilling machine air compressor has a working pressure state and an unloading state, the air pressure in the working pressure state is greater than the air pressure in the unloading state, the working pressure state at least comprises a first working pressure state and a second working pressure state, and the air pressure in the second working pressure state is less than the air pressure in the first working pressure state; a first pressure regulating branch, a second pressure regulating branch and an unloading branch are arranged between the air storage tank and the air compressor of the drilling machine in parallel, and start and stop of a first working pressure state, a second working pressure state and an unloading state are controlled respectively. The patent application number 94116568X discloses a pressure control switch device for an air compressor, which comprises two cylinders arranged in parallel in a body, a low pressure sensing mechanism and a high pressure sensing mechanism respectively arranged in the two cylinders, wherein the high pressure sensing mechanism and the low pressure sensing mechanism respectively comprise a piston, a spring and an adjusting screw which are sleeved in the cylinders, and the impedance of the piston can be set by rotating the adjusting screw, so that the piston can feel the set pressure.
The high and low pressure states of the two inventions can not be organically connected, the automatic control degree is low, and the two inventions can not be flexibly adjusted according to requirements.
Disclosure of Invention
The purpose of the invention is as follows:
the invention provides a double-feedback control system and a double-feedback control method for an air compressor unit, wherein the pressure and the flow are respectively controlled, and two kinds of pressure gas can be output.
The technical scheme is as follows:
the invention provides a double feedback control system of an air compressor unit, which comprises a small compressor unit (a single air compressor or a small number of air compressors are connected in parallel) for providing low-pressure air, a low-pressure pipeline (low-pressure air flows through the small compressor unit and the low-pressure pipeline, the pressure design value of the low-pressure air is 0.35-0.45mpa, the low-pressure value is short) to a low-pressure air user, a large compressor unit (a large number of air compressors are connected in parallel) for providing high-pressure air, and a high-pressure pipeline (high-pressure air flows through the large compressor unit and the high-pressure pipeline, the pressure design value of the high-pressure air is 0.55-0.65mpa, the high-pressure value; an intercommunicating pipeline is arranged between the low-pressure pipeline and the high-pressure pipeline, and a flow distribution valve for controlling the on-off of the intercommunicating pipeline is arranged on the intercommunicating pipeline.
A low pressure flow meter and a low pressure gauge are provided on the low pressure line between the intercommunication line and the low pressure gas user, and a high pressure gauge is provided on the high pressure line between the intercommunication line and the high pressure gas user (or a high pressure flow meter is provided to more accurately measure and control the pressure of the compressed air of the high pressure gas user).
The flow controller is connected with the low-pressure flowmeter through a flow signal line and can receive flow signals of the low-pressure flowmeter, the flow controller is connected with the low-pressure gauge through a pressure signal line C and can receive pressure signals of the low-pressure gauge, and the flow controller is connected with the flow distribution valve through a flow control line and can be opened and closed.
The pressure controller is provided with a pressure control line A which is connected with the low-pressure gauge and can receive a pressure signal of the low-pressure gauge, and the pressure controller is connected with the small compressor unit and can control the start and stop of the small compressor unit; the pressure controller is provided with a pressure signal line B which is connected with the high-pressure gauge and can receive pressure signals of the high-pressure gauge, and the pressure controller is provided with a pressure control line B which is connected with the large-scale compressor unit and can control the start and stop of the large-scale compressor unit. The gas pressure and the change of each branch are collected in time and are correspondingly adjusted, so that the gas source can fully ensure the supply, and the energy consumption of the compressor is not wasted.
The flow controller and the pressure controller are preferably provided with a linkage induction control circuit to realize a combined regulation and control function, manual control is basically not needed, the labor cost is reduced, and the automation level is provided.
Description of a control method and a working process:
when the high-pressure compressor works, a pressure signal of the high-pressure gauge is transmitted to the pressure controller, and when the pressure signal is higher than a high pressure value, the pressure controller controls the large compressor unit to stop. And when the pressure value is lower than the high pressure value, the pressure controller controls the large compressor unit to start.
And a pressure signal of the low-pressure gauge is transmitted to the pressure controller, and when the pressure signal is higher than a low pressure value, the pressure controller controls the small compressor unit to stop. When the pressure signal is lower than the low pressure value, two situations are distinguished:
1) when the flow signal of the low-pressure flowmeter is greater than the preset value, the flow controller controls the flow distribution valve to be opened, the compressed air at the high-pressure side flows away partially through the flow distribution valve and enters the low-pressure pipeline to supplement the compressed air at the low-pressure side, the compressed air at the high-pressure side is slightly reduced, and the large-scale compressor unit does not need to be started for supplying (the number of starting and stopping times is reduced, the energy consumption is saved, and the service life of equipment is prolonged). When the pressure is lower than the preset high pressure value, the pressure controller controls the large-scale compressor unit to start).
2) When the flow signal of the low-pressure flowmeter is smaller than the preset value, the flow controller controls the flow distribution valve to be kept closed, the flow controller controls the small compressor unit to perform variable-frequency accelerated starting (the small compressor unit is a variable-frequency compressor unit) through the linkage induction of the pressure controller, and low-pressure side compressed air is supplemented slightly, so that the pressure of the low-pressure side compressed air is slightly improved (because the flow is not large, the pressure does not need to be excessively increased).
The control of the above-described process is provided so that in the apparatus employing the present invention, the flow rate of the respective compressed air can be varied regardless of the low-pressure line and the high-pressure line, and the pressure of the respective compressed air is kept varied within a relatively narrow range.
The pressure controller can adopt a prediction model software to control the operation, the prediction model software is preferably established by a least square support vector machine with a nonlinear object, and the method is suitable for establishing a model prototype and is also suitable for practical production application, and the manual simulation operation of a single machine is converted into accurate global digital control to obtain the optimized air flow supply and distribution effect.
Has the advantages that:
the invention can accurately provide compressed air with two pressures for different users. And linkage control is realized, and much manual operation is not needed. Air pressure and flow are supplemented immediately, air supply efficiency is high, and power consumption is low. Especially, through dual signal acquisition and feedback control of flow and pressure, two different types of users can obtain proper air sources, and the air sources can be accurately regulated and controlled to recover normal supply when parameters of the air sources fluctuate. The whole system has simple structure and flow, less adopted parts and lower cost, and is convenient to popularize and apply in various different places such as factories or living areas.
Drawings
FIG. 1 is a schematic diagram of one configuration of the control system of the present invention;
1-large compressor set; 2-a small compressor set; 3-a pressure controller; 4-a low pressure line; 5-pressure signal line A; 6-low pressure gauge; 7-a low pressure flow meter; 8-low voltage user; 9-flow signal line; 10-linkage induction control circuit; 11-a flow controller; 12-flow control line; 13-high voltage user; 14-a high pressure gauge; 15-high pressure line; 16-pressure signal line B; 17-a flow distribution valve; 18-intercommunicating piping; 19-pressure control line B; 20-pressure control line A; 21-pressure signal line C.
Detailed Description
The dual feedback control system of the air compressor set shown in fig. 1 includes a small compressor set for providing low-pressure air, a low-pressure pipeline from the small compressor set to a low-pressure air user, a large compressor set for providing high-pressure air, and a high-pressure pipeline from the large compressor set to the high-pressure air user, wherein an intercommunication pipeline is arranged between the low-pressure pipeline and the high-pressure pipeline, and a flow distribution valve for controlling the intercommunication pipeline is arranged on the intercommunication pipeline.
A low pressure flow meter and a low pressure gauge are arranged on a low pressure pipeline between the intercommunication pipeline and a low pressure gas user, and a high pressure gauge is arranged on a high pressure pipeline between the intercommunication pipeline and a high pressure gas user.
In addition, the flow controller is connected with the low-pressure flowmeter through a flow signal line and can receive flow signals of the low-pressure flowmeter, the flow controller is connected with the low-pressure gauge through a pressure signal line C and can receive pressure signals of the low-pressure gauge, and the flow controller is connected with the flow distribution valve through a flow control line and can be opened and closed by the controller. The pressure controller is provided with a pressure control line A which is connected with the small compressor set and can control the start and stop of the small compressor set; the pressure controller is provided with a pressure signal line B which is connected with the high-pressure gauge and can receive pressure signals of the high-pressure gauge, and the pressure controller is provided with a pressure control line B which is connected with the large-scale compressor unit and can control the start and stop of the large-scale compressor unit.
A linkage induction control circuit is arranged between the flow controller and the pressure controller to realize the combined regulation and control function.
The control process is as follows: the pressure signal of the high-pressure gauge is transmitted to the pressure controller, and when the pressure signal is higher than the high-pressure value, the pressure controller controls the large compressor unit to stop; when the pressure value is lower than the high pressure value, the pressure controller controls the large compressor unit to start; and a pressure signal of the low-pressure gauge is transmitted to the pressure controller, and when the pressure signal is higher than a low pressure value, the pressure controller controls the small compressor unit to stop.
The pressure controller is controlled to run by adopting prediction model software, and the prediction model software is established by a least square support vector machine with a nonlinear object. By adopting the system and the control method, the compressed air with two pressures can be accurately provided for different users, the air pressure and the flow are supplemented immediately, the air supply efficiency is higher, and the power consumption is lower.
Claims (3)
1. A control method of a double feedback control system of an air compressor unit comprises a small compressor unit for providing low-pressure air, a low-pressure pipeline from the small compressor unit to a low-pressure air user, a large compressor unit for providing high-pressure air, and a high-pressure pipeline from the large compressor unit to the high-pressure air user, and is characterized in that:
an intercommunicating pipeline is arranged between the low-pressure pipeline and the high-pressure pipeline, and a flow distribution valve for controlling the on-off of the intercommunicating pipeline is arranged on the intercommunicating pipeline;
a low-pressure flow meter and a low-pressure gauge are arranged on a low-pressure pipeline between the intercommunication pipeline and a low-pressure gas user, and a high-pressure gauge is arranged on a high-pressure pipeline between the intercommunication pipeline and a high-pressure gas user;
the flow controller is connected with the low-pressure flowmeter through a flow signal line and can receive flow signals of the low-pressure flowmeter, the flow controller is connected with the low-pressure gauge through a pressure signal line C and can receive pressure signals of the low-pressure gauge, and the flow controller is connected with the flow distribution valve through a flow control line and can control the flow distribution valve to be opened and closed; the pressure controller is provided with a pressure control line A which is connected with the low-pressure gauge and can receive a pressure signal of the low-pressure gauge, and the pressure controller is connected with the small compressor unit and can control the start and stop of the small compressor unit; the pressure controller is provided with a pressure control line B which is connected with the large compressor unit and can control the start and stop of the large compressor unit;
a linkage induction control circuit is arranged between the flow controller and the pressure controller to realize a combined regulation function;
when the pressure signal of the low-pressure gauge is lower than a low-pressure value and the flow signal of the low-pressure flow meter is smaller than a preset value, the flow controller controls the flow distribution valve to be kept closed, the flow controller controls the small compressor unit to perform variable-frequency accelerated starting through linkage induction of the pressure controller, and low-pressure side compressed air is slightly supplemented, so that the pressure of the low-pressure gauge is slightly increased.
2. The control method of the dual feedback control system of the air compressor set according to claim 1, characterized in that: when the flow signal of the low-pressure flowmeter is greater than the preset value, the flow controller controls the flow distribution valve to be opened, a part of the compressed air at the high-pressure side flows away through the flow distribution valve and enters the low-pressure pipeline to supplement the compressed air at the low-pressure side, the compressed air at the high-pressure side is slightly reduced, and a large-scale compressor unit is not required to be started for supplement; and when the pressure of the compressed air at the high-pressure side is lower than a preset high-pressure value, the pressure controller controls the large-scale compressor unit to start.
3. The control method of the dual feedback control system of the air compressor set according to claim 1 or 2, characterized in that:
the pressure signal of the high-pressure gauge is transmitted to the pressure controller, and when the pressure signal is higher than the high-pressure value, the pressure controller controls the large compressor unit to stop; when the pressure value is lower than the high pressure value, the pressure controller controls the large compressor unit to start;
and a pressure signal of the low-pressure gauge is transmitted to the pressure controller, and when the pressure signal is higher than a low pressure value, the pressure controller controls the small compressor unit to stop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710755071.6A CN107327396B (en) | 2017-08-29 | 2017-08-29 | Double-feedback control system and control method of air compressor unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710755071.6A CN107327396B (en) | 2017-08-29 | 2017-08-29 | Double-feedback control system and control method of air compressor unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107327396A CN107327396A (en) | 2017-11-07 |
| CN107327396B true CN107327396B (en) | 2020-02-14 |
Family
ID=60203899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710755071.6A Active CN107327396B (en) | 2017-08-29 | 2017-08-29 | Double-feedback control system and control method of air compressor unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107327396B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110714908B (en) * | 2019-10-18 | 2021-10-26 | 蘑菇物联技术（深圳）有限公司 | Joint control method and system for air compression station |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103807153A (en) * | 2012-11-09 | 2014-05-21 | 软控股份有限公司 | Automatic control energy saving system and control method thereof |
| CN207500098U (en) * | 2017-08-29 | 2018-06-15 | 南通醋酸纤维有限公司 | The dual feedback control system of air-compressor set |
-
2017
- 2017-08-29 CN CN201710755071.6A patent/CN107327396B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103807153A (en) * | 2012-11-09 | 2014-05-21 | 软控股份有限公司 | Automatic control energy saving system and control method thereof |
| CN207500098U (en) * | 2017-08-29 | 2018-06-15 | 南通醋酸纤维有限公司 | The dual feedback control system of air-compressor set |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107327396A (en) | 2017-11-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101310110B (en) | Installation for high pressure compression with several stages | |
| EP3057685B1 (en) | Oxygen concentrator for mechanical ventilation | |
| CN102954051B (en) | Accumulator system capable of automatically regulating inflation pressure | |
| CN103047123B (en) | Stepless displacement control method for reciprocating compressor | |
| CN107327396B (en) | Double-feedback control system and control method of air compressor unit | |
| CN204099146U (en) | Hydraulic variable displacement pump | |
| CN206175190U (en) | Energy -conserving all -in -one of visual air compressor machine | |
| CN204877904U (en) | Air compressor | |
| CN207500098U (en) | The dual feedback control system of air-compressor set | |
| CN107542711A (en) | A kind of pressure charging system | |
| CN204877841U (en) | Air compressor with a plurality of motors | |
| CN203906417U (en) | Air-driven and liquid-operated power system on corner combining machine | |
| CN204403003U (en) | A kind of hydraulic system | |
| CN103939738B (en) | Control method of valve low temperature detection helium gas recycling system | |
| CN207331862U (en) | A kind of combination compression system of water system | |
| CN203017833U (en) | High pressure filter press with linked feed pressure and compacting pressure | |
| CN203717298U (en) | Energy-saving device for air compressor | |
| CN205246337U (en) | Pressure testing device | |
| CN203257428U (en) | Novel setting accelerator conveying system | |
| CN110874103B (en) | Control method, control system and control device of seawater desalination test platform | |
| CN103967856A (en) | Air drive hydraulic power system used on corner combination machine | |
| CN201539396U (en) | Water pump pressure controller with adjustable starting pressure | |
| CN201158168Y (en) | Automatic air pressure regulating apparatus | |
| CN204493211U (en) | A kind of blade flow suction booster | |
| CN103846195A (en) | Glue material supply apparatus |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |