CN203962358U - A kind of power air compressor - Google Patents
A kind of power air compressor Download PDFInfo
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- CN203962358U CN203962358U CN201420253545.9U CN201420253545U CN203962358U CN 203962358 U CN203962358 U CN 203962358U CN 201420253545 U CN201420253545 U CN 201420253545U CN 203962358 U CN203962358 U CN 203962358U
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- air compressor
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Abstract
The utility model discloses a kind of power air compressor, comprise compressor host (1), motor (2), power supply unit (3), pressure transducer (4), controller (5), the first contactor (7) being connected with motor (2) and the second contactor (8), wherein, the first contactor (7) is connected with power supply unit (3) by starter (6), the second contactor (8) is directly connected with power supply unit (3), and the start/stop of described starter (6), adhesive/the disconnection of the first contactor (7) and the second contactor (8) is connected control by controller (5), have simple in structurely, reasonable in design, fabricating cost is low, failure rate is low, high reliability.
Description
Technical field
The utility model relates to air compressor, and a kind of power air compressor is provided especially.
Background technique
Air compressor is the main body in compressed air source unit, it is the mechanical energy that converts electrical energy into prime mover (normally motor), the device that again mechanical energy of prime mover (normally motor) is converted to gas pressure energy is compressed-air actuated pressure generator; Electric energy is converted to mechanical energy can produce consumption, and the consumption that mechanical energy is converted to gas pressure energy is larger, and therefore gas pressure can become a kind of energy of costliness, and air compressor also just becomes the big power consumer of enterprise.But gas pressure can all be widely used at industry-by-industry, due to the popularity of its application and the huge property of energy consumption, power has huge social benefit and a social value with air compressor is energy-conservation.
User is three kinds of situations of general existence in the process that uses compressor: the one, and nearly all user is in use gas process, and the tolerance of its use all fluctuates; The 2nd, user will install gas holder in air compressor station layoutprocedure; The 3rd, the variation of user's gas consumption is to reflect by the variation of the pressure of gas holder.In the time that user's gas consumption increases, the pressure of gas holder just reduces, and in the time that user's gas consumption reduces, the pressure of gas holder just raises.In order to adapt to the variation of user's gas consumption, air compressor tends to adopt the controlling method of empty and load conversion, or adjusts the controlling method of main frame motion speed, adapts to the variation of user's gas consumption.The compressor that adopts empty and load switching control method, we are called power frequency compressor, adopt the compressor of adjusting engine speed controlling method, and we are called frequency-conversion air compressor.
The main motor that power frequency air compressor refers to compressor moves under the operating mode of 50 hertz of the power supply frequencies of standard, and its motor is in the process of operation, and the rotational speed of electric machine main shaft is changeless.The adjustment mode of power frequency air compressor air displacement is suction valve control, and the controlling method of power frequency air compressor is motor star-triangle start, and in the time that system pressure reaches the upper pressure limit of setting, suction valve cuts out, compressor no-load running; When system pressure reduce to set low pressure limit time, INO, compressor loads operation.Although the power frequency air compressor based on this controlling method does not increase extra cost.But the shortcoming of power frequency air compressor operation is in the time of air compressor no-load running, and motor still, in running, can be wasted a large amount of energy.In China, nearly up to a million of the use amount of power frequency air compressor, a common air compressor has at least 30% to be no-load running, only no-load running this just caused a large amount of energy wastes.
The controlling method of frequency-conversion air compressor is to be changed and supplied with the frequency of main motor power by frequency variator, makes the air compressor can be according to the variation of custom system pressure, and the main motor rotational speed of air compressor is changed.In the time that system pressure raises, main motor speed reduces, and when system pressure reduces, main motor speed raises.Like this, adapt to the variation of user's gas consumption by the variation of main motor speed, make user's system pressure can keep basicly stable.The advantage of frequency-conversion air compressor controlling method maximum is exactly that it has eliminated the air compressor no-load running time substantially, makes the energy consumption of no-load running obtain maximum saving.But also there is following shortcoming in the frequency-conversion air compressor based on frequency converter control method: the firstth, and user's purchase cost increases considerably.Variable-frequency motor, frequency variator, frequency-changing control system are all no small costs for user, also because the increase of these costs, frequency-conversion air compressor application area is up to the present also smaller, and the power savings advantages of frequency-conversion air compressor does not really embody; The secondth, the power consumption of frequency-conversion air compressor itself, the main components of frequency variator is such as commutation diode, electric capacity, IGBT etc. can heating loss's energy, the most obvious illustration of frequency variator energy waste is exactly that frequency variator need to add radiator, so that the dissipation of heat that components and parts energy loss is produced is gone out, and because frequency variator is the rotating speed that Ac is changed into direct current and regulates motor, in the process changing at alternating direct-current, large appointment consumes 3～5% electric energy.3～5% energy waste is still a googol, and taking 55 kilowatt motors as example, if by Frequency Converter Control, only the frequency variator power consumption of a year itself just at least needs the expense of more than 10,000 yuan.Visible, the power consumption of frequency variator own also can not be ignored; The 3rd is the decrease in efficiency that frequency variator makes motor, and electric efficiency declines, and air compressor power consumption nature is also with regard to corresponding increase, and typically the efficiency of power frequency motor is more a lot of than the excellent in efficiency of variable-frequency motor; The 4th is the reliability reduction of air compressor, and owing to having increased corresponding electrical apparatus element, the rate of fault of air compressor can increase accordingly to some extent.
Therefore, how to reduce costs and energy waste, improve working efficiency and the reliability of air compressor, become those skilled in the art's problem demanding prompt solution.
Model utility content
Given this, the purpose of this utility model is at least to solve the no-load running that power frequency compressor exists in the past, waste energy and inefficiency that frequency-changeable compressor exists, and the problem such as fabricating cost is high, rate of fault height.
The technological scheme that the utility model provides is: a kind of power air compressor, it comprises compressor host 1, the motor 2 being connected with compressor host 1, power supply unit 3, for with the tank connected pressure transducer 4 of extraneous gas storage and the controller 5 that is connected with pressure transducer 4, and described controller 5 is controlled respectively feather valve 1-1 on compressor host 1 and the On/Off of outlet valve 1-3, Aspirating valves 1-2 on the corresponding control compressor host 1 of while feather valve 1-1 closes/opens, it is characterized in that, described air compressor also comprises:
The first contactor 7 being connected with motor 2 respectively and the second contactor 8, wherein, the first contactor 7 is connected with power supply unit 3 by starter 6, the second contactor 8 is directly connected with power supply unit 3, and the start/stop of described starter 6, described the first contactor 7 are connected control with the adhesive/disconnection of the second contactor 8 by controller 5.
Preferably, described starter 6 is for can realize infinite variable speed linear actuator.
Further preferably, described starter 6 is frequency variator.
Further preferably, described air compressor also comprises baffler 9, and described baffler 9 is connected with the outlet valve 1-3 on compressor host 1.
Further preferably, described air compressor also comprises air-cooler 10, and described air-cooler 10 is connected with pressure transducer 4.
The power air compressor that the utility model provides, adhesive by controller control the first contactor/close control motor electric startup and power-off, adhesive by controller control the second contactor/close control the operation of motor and stop, and then realize the operation of air compressor and stop, can solve the unloaded energy waste problem of air compressor, energy saving.
The power that the utility model provides is with in air compressor; by the setting of starter; realize starting and power-off to electricity at any time of motor, can ensure that air compressor in load operating or the shutdown two states of awaiting orders, has energy saving in interval all the time; working efficiency; simple in structure, reasonable in design, fabricating cost is low; failure rate is low, high reliability.
Brief description of the drawings
In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is that power is used air compressor structure schematic diagram-1;
Fig. 2 is that power is used air compressor structure schematic diagram-2;
Fig. 3 is that power is used air compressor structure schematic diagram-3;
Fig. 4 is the circuit diagram of power air compressor.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technological scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment who obtains under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, Fig. 2, Fig. 3 is a kind of power air compressor, specifically comprise the compressor host 1 for air compressing, on compressor host, be provided with feather valve 1-1, Aspirating valves 1-2 and outlet valve 1-3, on compressor host 1, also connect promising its simultaneously the motor 2 of power is provided, on motor 2, connect respectively the first contactor 7 and the second contactor 8, wherein, starter 6 is connected with motor 2 by the first contactor 7, starter 6 is connected with power supply unit 3, the second contactor 8 is directly connected with power supply unit 3, the start/stop of starter 6, adhesive/the disconnection of the first contactor 7 and the second contactor 8 is controlled by the controller 5 in air compressor, thereby control motor 2 to electricity whether, can also control respectively feather valve 1-1 on compressor host 1 and the On/Off of outlet valve 1-3 with Time Controller 5, feather valve 1-1 can control the On/Off of Aspirating valves 1-2, on controller 5, be connected with pressure transducer 4, this pressure transducer 4 is connected with extraneous gas holder, the force value that controller 5 transmits according to pressure transducer 4 and in it default force value compare, and then control starter 6, the first contactor 7, the second contactor 8, feather valve 1-1 and outlet valve 1-3 move accordingly, realize that air compressor carries out load operating or shutdown is awaited orders.
Wherein, starter 6 is preferably can realize infinite variable speed linear actuator, thereby reduces the impact to electric motor starting, extends the working life of motor, is more preferably frequency variator.
Different from technique scheme, can also the outlet valve 1-3 on compressor host 1 on joint noise reduction device 9, the noise producing while reducing release pressure during for earth pressure release in compressor host.
Different from technique scheme, on pressure transducer 4, be connected with air-cooler 10, for reducing discharging compressed-air actuated temperature.
The air compressor structure that lower mask body is stated is above the whole control procedure that example explains this air compressor.
Wherein, this power is with in air compressor: 1, motor can be any number of stages, describes below as an example of 4 grades of motors example.2, starter be preferably can control motor start time rotating speed raising be linear (stepless speed regulation), be below taking frequency variator as starter as example explanation.
Can run well in order to ensure air compressor, carry out the standard detection of compressor, first whether detected pressures sensor is normal, if whether pressure transducer normally detects various valves normal, if normally whether detected temperatures switch is normal for various valves, if whether thermal switch normally detects compressor host temperature normal, if whether compressor host temperature normally detects motor temperature normal, if whether motor temperature normally detects power supply normal, if whether power supply normally detects frequency variator normal, if whether frequency variator normally detects the controller (being process control machine) of compressor normal, if the controller of compressor normally starts air compressor, concrete operation control procedure is:
1) press controller 5 startup button above, the first contactor 7 adhesives of air compressor for power, the feather valve 1-1 that controller 5 is controlled on compressor host 1 opens also time delay 2～5 seconds, and Aspirating valves 1-2 closes simultaneously, frequency variator starts simultaneously, frequency variator starting electrical machinery, through the time for acceleration of 3～4 seconds, the running speed of motor rises to 2000rpm left and right by 0rpm, and after the time for acceleration finishes, the first contactor 7 disconnects, motor power-off, now frequency variator quits work;
2) the process time delay of approximately 0.5～1 second, motor speed is reduced to 1500rpm left and right, and (this example is taking 4 grades of motors as example, the specified running speed of 4 grades of motors is 1500rpm), this Time Controller 5 is controlled the second contactor 8 adhesives, and feather valve 1-1 opens also time delay 1 second, Aspirating valves 1-2 closes simultaneously, motor 2 obtains electric operation, and after time delay finishes, feather valve 1-1 closes, Aspirating valves 1-2 opens, compressor loads operation;
3) pressure transducer 4 detects the pressure of gas holder, then be transferred to controller 5, in the time that pressure reaches the upper pressure limit value that controller 5 sets, controller 5 controls that feather valve 1-1, outlet valve 1-3 open and time delay 3～5 seconds, and Aspirating valves 1-2 closes simultaneously, outlet valve 1-3 discharges the pressure in compressor host 1 by connected baffler 9, after feather valve 1-1 and outlet valve 1-3 time delay finish, the second contactor 8 disconnects, and motor 2 power-off stop, compressor standby, out of service;
4) pressure transducer 4 detects the pressure of gas holder, then be transferred to controller 5, in the time that pressure reaches the low pressure limit value that controller 5 sets, controller 5 is controlled the first contactor 7 adhesives, and feather valve 1-1 opens also time delay 2～5 seconds, and Aspirating valves 1-2 closes simultaneously, frequency variator obtains electric, frequency variator starting electrical machinery, through the time for acceleration of 3～4 seconds, the running speed of motor rose to 2000rpm left and right by 0rpm;
5) repeating step 2)～step 4) control procedure, until end-of-job.
Wherein, the concrete control circuit figure of controller 5 is shown in Fig. 4.
Power air compressor in the present embodiment; in the time that pressure transducer detects that system pressure changes; controller by control the startup of frequency variator and stop, controlling the adhesive of the first contactor and disconnect control motor must electric startup and power-off; by controlling the adhesive of the second contactor or disconnecting and control the operation of motor and stop, and then the load operating and the shutdown that realize air compressor are awaited orders.
Wherein, when pressure reaches the force value upper limit that controller is set, pressure transducer is to the controller transmitted signal of air compressor, and controller control connects the second contactor and disconnects, and compressor is directly shut down.If the force value lower limit that pressure decreased arranges to controller, pressure transducer is to the controller transmitted signal of air compressor, the startup of controller control frequency variator and stop, controlling the adhesive of the first contactor and disconnect control motor electric startup and power-off, the operation controlling the operation of motor and then realize air compressor by controlling the adhesive of the second contactor; Needn't as common power frequency air compressor, change the working state of compressor by opening or close suction valve, when suction valve cuts out, if motor is still in operation, can not produce pressurized air, now motor operation is flogging a dead horse exactly, can cause a large amount of energy wastes, therefore power described in the utility model had both overcome with air compressor the huge energy waste that the no-load running of power frequency air compressor brings, and had also avoided degradation defect under the low and whole aircraft reliability of expensive, energy source secondary waste, the electric efficiency of frequency-conversion air compressor simultaneously.
The utility model medium power adopts the startup of the adhesive of first, second contactor of controller control and disconnection, control frequency variator and stops with air compressor, controls the startup of motor and stops and then the load operating and the shutdown that realizing compressor awaited orders.Make the running state of air compressor only have load operating and the shutdown two states of awaiting orders.But, motor starts the working life of meeting major injury motor repeatedly (because power frequency compressor electric motor uses star-triangle start mode, inrush current is 4～6 times of motor rated current, so start and stop frequently, can cause electric machine temperature rise high, power consumption is high, and the lighter affects electrical machinery life, severe one motor damage, the number of times that common electric machine starts is repeatedly < 6 times/hour).Therefore, for the startup repeatedly of motor, power air compressor in the utility model, not to use conventional star-triangle start, but control the startup of motor with frequency variator, first by the first contactor adhesive, frequency variator starts, Frequency Converter Control electric motor starting accelerates simultaneously, in the time that motor speed reaches 2000rpm left and right from 0rpm, the first contactor disconnects, frequency variator is out of service, motor power cut off delay 0.5-1 second, at this moment motor shaft is still rotating by the inertia of itself, just at 1500rpm, (this example is and 4 grades of motors are example the rotating speed that finishes rear motor when power cut off delay, the running speed of 4 grades of motors is 1500rpm) left and right, at this moment the controller control second contactor adhesive of compressor, motor obtains electric operation under the rotating speed of 1500rpm, motor can move and very smoothly without any impact like this, simultaneously because motor is by frequency variator Acceleration of starting, start-up course is linear (stepless speed regulation), inrush current is low, to motor without any impact injury, repeatedly start without unnecessary energy consumption, starting time, very short motor also can not generate heat simultaneously, so just can ensure repeatedly starting of motor and not affect working life of motor.At this moment frequency variator only participates in the start-up course of motor and does not participate in the operation of motor, the secondary energy consumption of the frequency variator bringing with regard to not existing the frequency variator of frequency-changeable compressor will participate in all the time operation.
In addition, the utility model medium power air compressor, can ensure that the use state of air compressor only has two kinds:
One is that loaded state is compressor work with all strength, and the utilization efficiency of compressor is the highest;
Another kind is that holding state is that compressor is out of service, and motor shuts down and do not have any energy loss.
Simultaneously, because motor is to use that frequency variator (stepless speed regulation) is linear to be started, inrush current is low, to motor without any impact, to electrical network without any impact, motor frequent starting and can not affect working life of motor repeatedly.Frequency variator only participates in the startup of motor simultaneously, and after electric motor starting, frequency variator is out of service, does not have the secondary energy consumption of frequency variator.Because frequency variator only participates in the startup of motor, when electric motor starting, the Aspirating valves of air compressor cuts out, the start-up course of motor is exactly substantially non-loaded start-up course like this, inrush current is low, therefore select and can use the frequency variator (frequency variator of frequency-conversion air compressor selects power range to be greater than power shelves of power of motor) that is less than power of motor for the power of frequency conversion, greatly reduce like this buying cost of frequency variator, and frequency variator do not participate in the operation of compressor, do not affect the working life of frequency variator.
Air compressor only has load operating like this, there is no no-load running, that is to say compressor loads operation when gas consumption is not enough, and when gas consumption is sufficient, compressor shutdown is awaited orders, and compressor only does useful work, does not flog a dead horse.
The practical situations of the utility model air compressor, frequency-conversion air compressor, power frequency air compressor for medium power is contrasted to concrete part table 1.
Table 1
Therefore, the utility model medium power air compressor, is applicable to various working, and has obvious advantage.
Describe with concrete data instance below
For example: with power of motor a: 55KW, exhaust pressure: 0.8Mpa, air displacement is that the air compressor of 10.1m3/min is example, compressor moves 8 hours every day, because air displacement can leave the surplus of 20%-30% when compressor type selecting, so can whole day not operate at full capacity while determining most compressor operating.
If every day, Load and execution time was 5 hours, be 3 hours idle time.So:
1, common power frequency air compressor has the idle time of 3 hours every day, be 3X30X12=1080 hour annual idle time, annual waste electric weight 1080X55=59400 degree electricity altogether, in 1 yuan of every degree electricity, wastes the electricity charge whole year: 59400X1=59400 unit altogether.
2, frequency-conversion air compressor if, although compressor is substantially without idle time, can produce 3%～5% electric quantity consumption but frequency variator itself is in service, like this, the electric weight of annual only frequency variator waste itself is 8X30X12X55X (3%～5%)=4750～7920, in 1 yuan of every degree electricity, the electricity charge of annual waste: 4750 yuan～7920 yuan.Here also do not count the impact of decrease in efficiency part and the inefficient part of variable-frequency motor itself of frequency-changeable compressor compressor in the time of low cruise, if all counted, the electricity charge of waste will reach more than 10,000 yuan so.
3, the utility model power air compressor, so because there is no no-load running no matter how long move, the electric weight of compressor waste is 0.
Below working 8 hours as example every day taking compressor for example, is very many but compressor reaches the operating mode of 16 hours, 24 hours working time every day, and the energy waste of calculating like this generation is an individual astronomical figure.
Below to locate the real data of collecting compressor user:
1, compressor electric motor power is 15KW, and the total run time of compressor is 1567 hours, and the load operation time is 282 hours, and so total no-load running time: 1567-282=1285 hour, always wastes electric weight approximately; 15X1285=19275 degree.
2, compressor electric motor power is 22KW, compressor total run time: 2675 hours, and total load working time: 758 hours, so total no-load running time: 2675-758=1917 hour, always wasted electric weight approximately; 22X1917=42174 degree.
3, compressor electric motor power is 45KW, compressor total run time: 9283 hours, and total load working time: 2769 hours, so total no-load running time: 9283-2769=6514 hour, always wasted electric weight approximately; 45X6514=293130 degree.
Can find out that from above example unloaded this part the energy waste of compressor is to be very huge, and the utility model medium power can effectively address this problem with air compressor.
Claims (5)
1. a power air compressor, it comprises compressor host (1), the motor (2) being connected with compressor host (1), power supply unit (3), for the controller (5) being connected with the tank connected pressure transducer of extraneous gas storage (4) and with pressure transducer (4), and described controller (5) is controlled respectively feather valve (1-1) on compressor host (1) and the On/Off of outlet valve (1-3), simultaneously the closing/open of the Aspirating valves (1-2) on feather valve (1-1) corresponding control compressor host (1), it is characterized in that, described air compressor also comprises:
The first contactor (7) being connected with motor (2) respectively and the second contactor (8), wherein, the first contactor (7) is connected with power supply unit (3) by starter (6), the second contactor (8) is directly connected with power supply unit (3), and the adhesive/disconnection of the start/stop of described starter (6), the first contactor (7) and the second contactor (8) is connected control by controller (5).
2. according to power air compressor described in claim 1, it is characterized in that: described starter (6) is for can realize infinite variable speed linear actuator.
3. according to power air compressor described in claim 2, it is characterized in that: described starter (6) is frequency variator.
4. according to power air compressor described in claim 1, it is characterized in that: described air compressor also comprises baffler (9), described baffler (9) is connected with the outlet valve (1-3) on compressor host (1).
5. according to power air compressor described in claim 1, it is characterized in that: described air compressor also comprises air-cooler (10), described air-cooler (10) is connected with pressure transducer (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420253545.9U CN203962358U (en) | 2014-05-16 | 2014-05-16 | A kind of power air compressor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420253545.9U CN203962358U (en) | 2014-05-16 | 2014-05-16 | A kind of power air compressor |
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| Publication Number | Publication Date |
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| CN203962358U true CN203962358U (en) | 2014-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420253545.9U Withdrawn - After Issue CN203962358U (en) | 2014-05-16 | 2014-05-16 | A kind of power air compressor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104153979A (en) * | 2014-05-16 | 2014-11-19 | 沈阳天朗艾尔压缩机有限公司 | Operation control method of power air compressor and compressor thereof |
| CN105927525A (en) * | 2016-05-19 | 2016-09-07 | 无锡汇能达科技有限公司 | Energy saving gas supply control method for workshop gas |
-
2014
- 2014-05-16 CN CN201420253545.9U patent/CN203962358U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104153979A (en) * | 2014-05-16 | 2014-11-19 | 沈阳天朗艾尔压缩机有限公司 | Operation control method of power air compressor and compressor thereof |
| CN104153979B (en) * | 2014-05-16 | 2016-08-24 | 沈阳天朗艾尔压缩机有限公司 | The progress control method of a kind of power air compressor and compressor thereof |
| CN105927525A (en) * | 2016-05-19 | 2016-09-07 | 无锡汇能达科技有限公司 | Energy saving gas supply control method for workshop gas |
| CN105927525B (en) * | 2016-05-19 | 2017-12-29 | 无锡汇能达科技有限公司 | Control method is supplied for the energy-conservation of workshop gas |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20141126 Effective date of abandoning: 20160824 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |