CN106050607B - A kind of energy-saving air compressor - Google Patents
A kind of energy-saving air compressor Download PDFInfo
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- CN106050607B CN106050607B CN201610571858.2A CN201610571858A CN106050607B CN 106050607 B CN106050607 B CN 106050607B CN 201610571858 A CN201610571858 A CN 201610571858A CN 106050607 B CN106050607 B CN 106050607B
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- frequency converter
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Classifications
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- 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
- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
- F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
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- 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
- F04B41/00—Pumping installations or systems specially adapted for elastic fluids
- F04B41/02—Pumping installations or systems specially adapted for elastic fluids having reservoirs
-
- 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
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- 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
- F04B49/20—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 by changing the driving speed
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
A kind of energy-saving air compressor, it is made of frequency converter, motor, air compressor machine, air accumulator, client, pressure transmitter and contactor, frequency converter, contactor and air compressor machine are equipped on motor, frequency converter and contactor are connected with power supply respectively, frequency converter is equipped with control panel, air compressor machine is connected with air accumulator by webmaster, and air accumulator is connected with client, and pressure transmitter is equipped between air accumulator and frequency converter；The present invention is highly practical, uses fairly simple, and control program is tight, coordinate, effect is good, ingenious in design, easy to implement, and the demand of client is also greatly facilitated while energy saving.
Description
【Technical field】
The present invention relates to a kind of air compressor machines, more particularly, to a kind of energy-saving air compressor.
【Background technology】
Well known, compressed air is the essential power source of processing industry, but the structure of existing air compressor is spiral shell
Rod-type, air is output to outlet side along screw axis by suction side, and air-breathing, compression and row are carried out under the rotation of screw rod
The control system of gas, air compressor is：The air compressor main motor method of operation is total head operation after star delta reduced-voltage starting,
Air supply system connects actuating coil by control system and opens oil cut-off valve, and air compressor starts under unloading mode, at this moment
Intake valve is closed, and vent valve is opened to discharge the pressure in gs-oil separator, and air compressor is opened after waiting decompression
Beginning load operating, system pressure are begun to ramp up, if system pressure rises to pressure switch upper limit value, i.e. release pressure, controller
Intake valve will be made to close, gs-oil separator is deflated, air compressor no-load running, until system pressure drops under pressure switch
It after limit value, that is, knock-ons under pressure, controller makes intake valve open, and gs-oil separator vent valve is closed, the fully loaded fortune of air compressor
Capable, because of the impossible long-time full-load run of air compressor, manufacturer can only solve capacity motor by maximum requirement,
Impact force is big when power frequency startup, and motor bearings abrasion is big, and plant maintenance amount is big, it is often more important that user's tolerance is few or pressure reaches
Motor still no-load running when upper limit value wastes valuable electric energy.
【Invention content】
In order to overcome the shortcomings of in background technology, the invention discloses a kind of energy-saving air compressor, the present invention passes through
Air compressor machine, motor and frequency converter are set on air accumulator, and PID control system is set on frequency converter, is stored up with this to reach
Constant air pressure and the purpose for meeting client demand in gas tank.
In order to realize that the goal of the invention, the present invention adopt the following technical scheme that：
A kind of energy-saving air compressor, including frequency converter, motor, air compressor machine, air accumulator, client, pressure inverting
Device and contactor are equipped with frequency converter, contactor and air compressor machine on motor, and frequency converter and contactor are connected with power supply respectively
It connecing, frequency converter is equipped with control panel, and air compressor machine is connected with air accumulator by webmaster, and air accumulator is connected with client,
Pressure transmitter is equipped between air accumulator and frequency converter.
PID control system is equipped in the frequency converter, frequency converter controls motor by PID control system.
The air accumulator is equipped with closed-loop control system, and closed-loop control system is passed by frequency converter, pressure transmitter and pressure
Sensor is constituted, and pressure transmitter is connected with the PID in frequency converter, and pressure sensor is arranged between air compressor machine and air accumulator
On webmaster, the rotating speed of inverter control motor, the unit air output of the control air compressor machine of motor.
The PID control system by pressure sensor measure between air compressor machine and air accumulator ductwork pressure value and with control
Setup pressure value on panel compares, and obtains pressure difference and calculates the frequency that frequency converter acts on motor through PID control system
Rate value, feedback pressure, by PID control system comparison operation, the friendship of corresponding frequencies and amplitude are exported by frequency converter with setting pressure
Galvanic electricity, makes motor obtain corresponding rotating speed, the output of real-time control frequency converter, and air compressor machine the output phase answers compressed air to gas storage
Tank, it is equal with given pressure value to reach ductwork pressure, so that air accumulator inner air pressure is stabilized to setting pressure, air accumulator passes through
Pressure transmitter passes to signal in the PID control system in frequency converter.
The contactor and frequency converter are connected in parallel between power supply and motor, when the PID in frequency converter is stopped, contact
Device, which opens power supply, makes motor work on.
By adopting the above-described technical solution, the present invention has the advantages that：
A kind of energy-saving air compressor of the present invention, including frequency converter, motor, air compressor machine, air accumulator, client
End, pressure transmitter and contactor by the way that air compressor machine, motor and frequency converter are arranged on air accumulator, and are set on frequency converter
PID control system is set, client demand to achieve the purpose that constant air pressure in air accumulator and is met with this；Practicability of the present invention
By force, use fairly simple, control program is tight, coordinate, effect is good, ingenious in design, easy to implement, while energy saving
Greatly facilitate the demand of client.
【Description of the drawings】
Fig. 1 is the structural principle block diagram of the present invention；
Fig. 2 is the air accumulator constant pressure electrical control schematic of the present invention；
Fig. 3 is that reservoir pressure, frequency, the PID of the present invention sets graph of relation between pressure；
Fig. 4 is the main circuit of frequency converter circuit diagram of the present invention；
Fig. 5 is the PID control system schematic diagram of the present invention；
In figure：1, power supply；2, frequency converter；3, motor；4, air compressor machine；5, air accumulator；6, client；7, control panel；
8, pressure transmitter；9, contactor；10, speed signal；11, ready signal.
【Specific implementation mode】
By the following examples can the detailed explanation present invention, the open purpose of the present invention is intended to protect model of the present invention
Enclose all interior technological improvements.
A kind of energy-saving air compressor in conjunction with described in attached drawing 1 ~ 5, including frequency converter 2, motor 3, air compressor machine 4, storage
Gas tank 5, client 6, pressure transmitter 8 and contactor 9 are equipped with frequency converter 2, contactor 9 and air compressor machine 4 on motor 3, become
Frequency device 2 and contactor 9 are connected with power supply 1 respectively, and frequency converter 2 is equipped with control panel 7, and air compressor machine 4 passes through net with air accumulator 5
Pipe is connected, and air accumulator 5 is connected with client 6, and pressure transmitter 8 is equipped between air accumulator 5 and frequency converter 2；The change
PID control system is equipped in frequency device 2, frequency converter 2 controls motor 3 by PID control system；On the air accumulator 5
Equipped with closed-loop control system, closed-loop control system is made of frequency converter 2, pressure transmitter 8 and pressure sensor, pressure transmitter
8 are connected with the PID in frequency converter 2, and pressure sensor is arranged on the webmaster between air compressor machine 4 and air accumulator 5, frequency converter 2
Control the rotating speed of motor 3, the unit air output of the control air compressor machine 4 of motor 3；The PID control system is passed by pressure
Sensor measures the ductwork pressure value and compared with the setup pressure value on control panel 7 between air accumulator 5 of air compressor machine 4, obtains
Pressure difference calculates the frequency values that frequency converter 2 acts on motor 3 through PID control system, and feedback pressure passes through with setting pressure
PID control system comparison operation is exported the alternating current of corresponding frequencies and amplitude by frequency converter 2, motor 4 is made accordingly to be turned
Speed, the output of real-time control frequency converter 2,4 the output phase of air compressor machine answer compressed air to air accumulator 5, with reach ductwork pressure with to
Level pressure force value is equal, and 5 inner air pressure of air accumulator is made to be stabilized to setting pressure, and air accumulator 5 is passed signal by pressure transmitter 8
It passs in the PID control system in frequency converter 2；The contactor 9 and frequency converter 2 are connected in parallel between power supply 1 and motor 3, are become
When PID in frequency device 2 is stopped, contactor 9, which opens power supply 1, makes motor 3 work on.
Implement a kind of energy-saving air compressor of the present invention, 4 operational mode of air compressor machine uses variable-frequency control technique
With power frequency operation pattern, i.e., it can in time be switched on power-frequency voltage and run when frequency converter 2 breaks down, use frequency control skill
Art can save a large amount of electric energy energy, prolonged mechanical service life, reduction noise etc., it is to control air compressor machine 4 by changing 3 rotating speed of motor
The air output of unit interval, to reach the pressure of control webmaster, 4 optimal operating mode of air compressor machine is that operating pressure is stablized, and is adopted
With frequency converter 2, pressure transmitter 8 and pressure sensor electrical equipment decomposition pressure closed-loop control system, make air in air accumulator 5
Pressure stability carries out Isobarically Control and measures ductwork pressure value by pressure sensor as shown in Fig. 1,3,5 in setting range
Compared with control panel setup pressure value, obtain pressure difference and calculate frequency converter 2 through PID control system acting on motor 3
Frequency values, feedback pressure with setting pressure carry out being compared operation by PID control system, answered by 2 the output phase of frequency converter
The alternating current of frequency and amplitude makes motor 3 obtain corresponding rotating speed, the output of real-time control frequency converter 2,4 the output phase of air compressor machine
Answer compressed air to air accumulator 5, it is equal with given pressure value to reach ductwork pressure, so that 5 inner air pressure of air accumulator is stabilized to
Pressure is set, pressure is very stable during use, as pid value e (t)=r (t)-c (t)=0, i.e. setting value and value of feedback size
Equally, frequency converter will stop output frequency and voltage, and motor also can slowly stop, and whole process is as follows：With gas demand ↑ → pipe
The difference of road air pressure ↓ → pressure set points and value of feedback ↑ → PID output ↑ → frequency converter output frequencies ↑ → air compressor motor rotating speed
↑ → gas supply flow ↑ → pipeline air pressure tends towards stability, and air compressor machine 4 works under power save mode under normal circumstances, if frequency converter 2 one
Denier breaks down, and production technology does not allow air compressor machine 4 to shut down, therefore system is provided with economize on electricity and automatically switches work(with power frequency city electric energy
Can, in conjunction with shown in attached drawing 2 and 4, when using air compressor machine 4, the required of PID control system is set by control panel 7
Change-over switch SQ is screwed into auto state by pressure, contactor KM2 coils obtain it is electric will be attracted, KM2 assists normally-closed contact to disconnect
Realize that automatic running and the interlocking of city's electricity operation, KM2 main contacts have connected frequency converter three-phase output end and connecting terminal of motor, still
Frequency converter 2 does not have output voltage and frequency, motor not to operate, and contactor KM2 auxiliary contact are closed, when frequency converter 2 is normal,
Public L lines are connected with 2 internal relay terminal TB of frequency converter, and it is start button at this moment to press SB2, and intermediate relay K1 coils obtain
Electricity, normally-closed contact disconnect, and normally opened contact is closed, and K1 normally opened contacts are closed to form self-locking, and K1 normally opened contacts are closed, YV air inlets
Valve obtains electric intake valve and opens, and K1 normally opened contacts are closed, and frequency converter is connected to operation ready signal, while also receiving PID control system
The speed signal 10 and ready signal 11 of output, frequency converter 2 begins to export when speed signal 10 and ready signal 11 all meet
Voltage and frequency, motor 3 will Accelerating running, after a period of time, pressure sensor measure pressure conversion current signal feedback
To PID control system, PID control system will take value of feedback and setting value to be compared operation, i.e.,：E (t)=r (t)-c (t),
If e (t) is more than 0, PID control system will output current, frequency converter 2 works on, if being PID control less than or equal to 0
System would not output current, Real-time Feedback real-time control, entire air supply system would be at pressure constant state, if frequency converter 2
It breaks down, internal relay will export, and TC and TA is connected, and K2 obtains electric, K2 normally-closed contacts disconnection KM2 dead electricity, KM2 master
Contact disconnects 2 output point of frequency converter, and the normally closed point of KM2 auxiliary, which resets, to be connected, and K2 normally opened contacts are closed KM1 coils and obtain electric, main contacts
Motor is connected, KM1 assists normally opened contact to connect, and YV obtains electric intake valve and opens, and when reaching setting pressure, pressure switch PS is normal
Close point just will disconnect, and YV powers off intake valve and is closed, and realize that unloading, motor 3 are in no-load running, i.e. alternating current operational mode, this
Practical new control program, tight, coordination, effect are good, ingenious in design, easy to implement, are also greatly facilitated while energy saving
The demand of client.
Part not in the detailed description of the invention is the prior art, although specifically showing and describing this hair in conjunction with preferred embodiment
It is bright, it implements the technical solution method and there are many approach, the above is only a preferred embodiment of the present invention, but affiliated neck
The technical staff in domain, which should be understood that, not to be departed from the spirit and scope of the present invention defined by the appended claims, in shape
In formula and the present invention can be made a variety of changes in details, be protection scope of the present invention.
Claims (1)
1. a kind of energy-saving air compressor, which is characterized in that compressor operation pattern uses variable-frequency control technique
With power frequency operation pattern, it can in time be switched on power-frequency voltage and run when frequency converter breaks down, be by changing electricity
Motivation rotating speed controls the air output of air compressor machine unit interval, to reach the pressure of control webmaster,
Using frequency converter, pressure transmitter and pressure sensor electrical equipment decomposition pressure closed-loop control system, make in air accumulator
Air-pressure stable carries out Isobarically Control, ductwork pressure value is measured by pressure sensor in setting range
Compared with control panel setup pressure value, obtain pressure difference through PID control system calculate frequency converter act on it is electronic
The frequency values of machine, feedback pressure are carried out being compared operation by PID control system, be answered by frequency converter the output phase with setting pressure
The alternating current of frequency and amplitude, makes motor obtain corresponding rotating speed, the output of real-time control frequency converter, and air compressor machine the output phase should press
Contracting air is equal with given pressure value to reach ductwork pressure to air accumulator, and air accumulator inner air pressure is made to be stabilized to setting pressure
Power, pressure is very stable during use, as pid value e (t)=r (t)-c (t)=0, i.e. setting value as value of feedback size,
Frequency converter will stop output frequency and voltage, and motor also can slowly stop, and whole process is as follows：With gas demand ↑ → pipeline gas
The difference of pressure ↓ → pressure set points and value of feedback ↑ → PID output ↑ → frequency converter output frequencies ↑ → air compressor motor rotating speed ↑ →
Gas supply flow ↑ → pipeline air pressure tends towards stability, and air compressor machine works under power save mode under normal circumstances, if frequency converter once occurs
Failure, production technology do not allow air compressor machine to shut down, therefore system is provided with economize on electricity and power frequency city electric energy automatic switching function, to make
When with air compressor machine, the required pressure of PID control system is set by control panel, and change-over switch SQ is screwed into automatic shape
State, contactor KM2 coils obtain it is electric will be attracted, KM2 assist normally-closed contact disconnect realize automatic running and city's electricity operation interlocking,
KM2 main contacts has connected frequency converter three-phase output end and connecting terminal of motor, but frequency converter does not have output voltage and frequency, electricity
Motivation will not operate, and contactor KM2 auxiliary contact are closed, when frequency converter is normal, public L lines and frequency converter internal relay terminal
TB connect, at this moment press SB2 be start button, intermediate relay K1 coils obtain it is electric, normally-closed contact disconnect, normally opened contact be closed,
K1 normally opened contacts are closed to form self-locking, and K1 normally opened contacts are closed, and YV intake valves obtain electric intake valve and open, and K1 normally opened contacts are closed,
Frequency converter is connected to operation ready signal, while also receiving the speed signal and ready signal of PID control system output, speed signal
Frequency converter begins to output voltage and frequency when all meeting with ready signal, motor will Accelerating running, after a period of time, pressure
Force snesor measures pressure conversion current signal and feeds back to PID control system, and PID control system will take value of feedback and setting value
It is compared operation, i.e.,：E (t)=r (t)-c (t), if e (t) be more than 0, PID control system will output current, frequency converter
Work on, if when less than or equal to 0, PID control system would not output current, Real-time Feedback real-time control is entire to supply
System would be at pressure constant state, if frequency converter breaks down, internal relay will export, and TC and TA is connected, K2 obtain it is electric,
K2 normally-closed contacts disconnect KM2 dead electricity, and KM2 main contacts disconnects frequency converter（ 2）Output point, the normally closed point of KM2 auxiliary, which resets, to be connected, K2
Normally opened contact is closed KM1 coils and obtains electric, main contacts connection motor, and KM1 assists normally opened contact connection, YV to obtain electric intake valve opening,
When reaching setting pressure, the normally closed points of pressure switch PS just will disconnect, and YV powers off intake valve and is closed, and realizes and unloads, at motor
In no-load running, i.e. alternating current operational mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610571858.2A CN106050607B (en) | 2016-07-20 | 2016-07-20 | A kind of energy-saving air compressor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610571858.2A CN106050607B (en) | 2016-07-20 | 2016-07-20 | A kind of energy-saving air compressor |
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| CN106050607A CN106050607A (en) | 2016-10-26 |
| CN106050607B true CN106050607B (en) | 2018-09-11 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109973373A (en) * | 2017-12-28 | 2019-07-05 | 中国船舶重工集团公司第七一一研究所 | To the device and method of single cylinder diesel gas supply |
| CN108980021A (en) * | 2018-07-27 | 2018-12-11 | 珠海市盛西源机电设备有限公司 | A kind of application method of frequency conversion energy-saving system on air compressor machine |
| CN110219802A (en) * | 2019-06-27 | 2019-09-10 | 西安交通大学 | A kind of three motor-driven single screw compressors |
| CN110195703A (en) * | 2019-06-27 | 2019-09-03 | 西安交通大学 | A kind of three motor-driven single screw compressor control methods |
| CN112332734B (en) * | 2020-09-07 | 2021-11-23 | 江苏大学 | Ultrahigh-speed electric air compressor variable voltage stability expansion control system and method for improving large-range speed regulation response capability |
| CN114352533B (en) * | 2022-01-24 | 2023-11-21 | 南通市红星空压机配件制造有限公司 | Control method for electric air inlet valve of mobile air compressor |
| CN115405527B (en) * | 2022-08-16 | 2023-05-12 | 长沙昌佳智慧流体科技有限公司 | Mining intelligent multistage centrifugal pump |
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| CN106050607A (en) | 2016-10-26 |
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Denomination of invention: An energy-saving air compressor Effective date of registration: 20230607 Granted publication date: 20180911 Pledgee: Bank of China Limited by Share Ltd. Luoyang branch Pledgor: LuoYang HongTai Semiconductor Co.,Ltd. Registration number: Y2023980043127 |