CN205013263U - Energy -conserving gas supply system of constant voltage - Google Patents
Energy -conserving gas supply system of constant voltage Download PDFInfo
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- CN205013263U CN205013263U CN201520628544.2U CN201520628544U CN205013263U CN 205013263 U CN205013263 U CN 205013263U CN 201520628544 U CN201520628544 U CN 201520628544U CN 205013263 U CN205013263 U CN 205013263U
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- air compressor
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- jar
- gas holder
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Abstract
The utility model discloses an energy -conserving gas supply system of constant voltage belongs to air compressor machine air technical field. The utility model discloses an air compressor machine, gas holder, PID controller, converter, pressure transmitter, feedback pipe, air compressor machine include motor, one -level jar and second grade jar, and the second grade jar passes through the intake pipe to be connected with the gas holder air inlet, draws forth the export on the gas holder, and the export falls into two the tunnel through three way connection, all the way with the one -level jar on the admission valve be connected this way formation atmospheric pressure feedback pipe, another way connection pressure changer, pressure transmitter is connected with PID controller, converter, the rotational speed of converter control motor, the work of electric machine control one -level jar and second grade jar, one -level jar and second grade jar pass through the trachea connection. The utility model discloses an one drags three to take the power frequency bypass. Mutually support through one -level jar and second grade jar and realize the linkage, feed back the one -level jar through negative pressure feedback pipe moreover, improved the job stabilization nature of air compressor machine, have the delivery pressure of automatically regulated air compressor machine moreover.
Description
Technical field
The utility model belongs to air compressor air technique field, especially relevant with a kind of constant-pressure energy-saving air supply system.
Background technique
Air compressor has in the industrial production to be applied widely.In name kind industry, which is responsible as all pneumatic elements of factory, comprise various pneumatic valve, the responsibility of source of the gas is provided.Therefore the quality that it runs directly affects plant production processes.Can variable-frequency control technique be applied in air compressor air feed field, while saving electric energy, also can improve performance of air compressor, improve the topic that air feed quality just becomes our care.The working state of tradition air compressor air supply system mainly contains two kinds: one is loaded state, and another kind is unloaded state.Loaded state is, after pressure reaches minimum value, former control mode determines that its pressure can continue to rise until maximum pressure value.In pressure process, must outwardly discharge more heat, thus cause energy loss.On the other hand, higher than the gas of Pressure maximum value before entering pneumatic element, its pressure needs through reduction valve decompression, and this process is a power consumption process equally.During unloading during the consumption unloaded state of electric energy, when pressure reaches Pressure maximum value, air compressor carrys out step-down unloading by the following method: close suction valve and make motor be in idling conditions, simultaneously by pressurized air unnecessary in knockout drum by atmospheric valve emptying.This regulating method will cause very large energy dissipation.According to our measuring and calculating, energy consumption during air compressor unloading accounts for during air compressor full load operation 10% ~ 25%, and this is still when unloading time proportion is little.In other words, the time of this air compressor about 20% is in unloaded state, is making idle work.Clearly adding under unloading air feed control mode, there is the very large energy saving space in air compressor motor.
Tradition air compressor air supply system does not allow frequent starting due to motor, causes the motor when gas consumption is few still to want no-load running, waste electric energy.Frequent unloading and loading cause whole gas net pressure often to change, and can not keep constant working pressure.Because work air compressor uses power frequency powered operation, all the time oepration at full load is in, the frequent start-stop of motor, large especially to motor infringement, easily add the aging of speed motor, the supply of long term atmospheric pressure is easy to cause tracheae to burst in addition, wastes electric energy greatly simultaneously, reduces service life of equipment.Publication number 203702493U discloses a kind of air compression system of type constant pressure air feeding, comprise motor, air compressor and gas holder, described motor is equipped with frequency variator, described motor is connected with air compressor, the air outlet of air compressor is connected with the suction port of gas holder, is provided with pressure transducer in described gas holder, and described pressure transducer is connected with PID controller, PID controller is connected with frequency variator the rotating speed for controlling frequency variator, and described gas holder is also equipped with pressure gauge.But the pressure transducer in this air compression system is arranged in gas holder, one come be install more difficult, two come pressure transducer be directly by signal feed back to PID controller, the work of motor is controlled by PID controller, so just cannot learn whether the working state of air compressor itself is applicable to the running state of air compressor, for this defect, applicant has researched and developed a kind of constant-pressure energy-saving air supply system.
Model utility content
The defects such as the installation difficulty that the pressure transducer that the purpose of this utility model is intended to overcome existing constant-pressure energy-saving air supply system exists, air compressor working state cannot ensure, provide a kind of constant-pressure energy-saving air supply system.
For this reason, the utility model is by the following technical solutions: constant-pressure energy-saving air supply system, comprise air compressor, gas holder, PID controller and frequency variator, it is characterized in that, described constant-pressure energy-saving air supply system also comprises pressure transmitter, feedback pipe, described air compressor comprises motor, first-stage cylinder and secondary cylinder, described secondary cylinder is connected with described gas holder suction port by suction tude, outlet drawn by gas holder, this outlet is divided into two-way by tee union, one tunnel is connected with the suction valve in described first-stage cylinder, this road forms described air pressure feedback pipe, pressure transmitter described in another road connects, pressure transmitter is connected with described PID controller, PID controller is connected with described frequency variator, the rotating speed of Frequency Converter Control motor, the work of Electric Machine Control first-stage cylinder and secondary cylinder, first-stage cylinder is connected by tracheae with secondary cylinder.
As to technique scheme supplement and perfect, the utility model also comprises following technical characteristics.
Described constant-pressure energy-saving air supply system also comprises warning device, and warning device is connected with described PID controller.
Described gas holder is also provided with automatic discharge opening, the pressure stability of gas holder can be realized by relief opening.
Described relief opening regulates openings of sizes by ball valve.
Described air compressor is screw compressor.
Use the utility model can reach following beneficial effect: the utility model adopts one to drag three band power frequency bypasses.Cooperatively interacted by first-stage cylinder and secondary cylinder and realize interlock, and feed back to first-stage cylinder by negative pressure feedback pipe, improve the working stability of air compressor, the utility model using the ductwork pressure of air compressor air supply system as control object, change electrical signal into by the pressure P of pressure transmitter SP collection gas holder and give PID Self tuning control instrument, make comparisons with the pressure set points SV of PID Self tuning control instrument, and carry out computing according to the size of difference by set PID control mode, produce control signal and send frequency variator, frequency of okperation and the rotating speed of motor is controlled by converter plant, thus make actual pressure P all the time close to setup pressure value SV.By the combination of frequency variator, pressure transducer and PID Self tuning control instrument, form air feed closed loop automatic control system, automatically regulate the delivery pressure of air compressor.Make the utilization ratio of every platform air compressor impartial, the stability of increase system, pipeline pressure and reliability, facilitate technician to control and service equipment.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail.
Embodiment: as shown in Figure 1, the utility model comprises air compressor, gas holder 1, PID controller 5, frequency variator 4, pressure transmitter 8, air pressure feedback pipe 10, air compressor comprises motor 3, first-stage cylinder 7 and secondary cylinder 2, secondary cylinder 2 is connected with gas holder 1 suction port by suction tude, outlet drawn by gas holder 1, this outlet is divided into two-way by tee union, one tunnel is connected with the suction valve in first-stage cylinder 7, this road forms air pressure feedback pipe 10, another road Bonding pressure transmitter 8, pressure transmitter 8 is connected with PID controller 5, PID controller 5 is connected with frequency variator 4, frequency variator 4 controls the rotating speed of motor 3, motor 3 controls the work of first-stage cylinder 7 and secondary cylinder 2, first-stage cylinder 7 is connected by tracheae with secondary cylinder 2.
Preferably, constant-pressure energy-saving air supply system also comprises warning device 6, and warning device 6 is connected with PID controller 5.
Preferably, gas holder 1 is also provided with automatic discharge opening 9, the pressure stability of gas holder 1 can be realized by relief opening 9.
Preferably, relief opening 9 regulates openings of sizes by ball valve.
Preferably, air compressor is screw compressor, and the working principle of helical-lobe compressor can be divided into air inlet, compression and exhaust three processes.Along with rotor rotates, often pair of intermeshing tooth completes identical work cycle in succession.Intake process: during rotor turns, the roller seating space space of negative and positive rotor is when going to inlet end wall opening, its space is maximum, now the communicating, because the gas of roller seating space is fully drained, when being vented when being vented of rotor roller seating space space and suction port, roller seating space is in vacuum state, when going to suction port, namely ambient atmos is inhaled into, and enters vertically in the roller seating space of negative and positive rotor.When gas is filled with whole roller seating space, rotor air inlet side end face leaves casing suction port, is namely closed at the gas of roller seating space.Compression process: negative and positive rotor is at the end of air-breathing, and its negative and positive rotor crown can be closed with casing, and now gas no longer outflows in roller seating space.Its Surface of action moves to exhaust end gradually.Gradually part is little in roller seating space space between Surface of action and relief opening, and the gas in roller seating space is improved by compression pressure.3, exhaust process: when the engagement end face of rotor forward to communicate with casing relief opening time, started to discharge by the gas compressed, until the Surface of action of crown and roller seating space moves to exhaust end face, now the Surface of action of negative and positive rotor and the roller seating space space of casing relief opening are 0, namely exhaust process is completed, roller seating space length at the same time between the Surface of action of rotor and casing suction port reaches again the longest, and intake process carries out again again.
As can be seen from above-mentioned working principle, helical-lobe compressor is the positive displacement gas compression machinery that a kind of swept volume does rotation motion.The compression of gas relies on the change of volume to realize, and the change of volume reaches do rotation motion in casing by a pair rotor of compressor.
This constant pressure air feeding control system increases power frequency and frequency conversion switching function; and retain original control and protection system; in addition; after adopting the program; air compressor motor can be started by converter plant from static to rotary work; achieve soft start, avoid inrush current and start the mechanical shock brought to air compressor.
The improved energy-saving effect of energy saving of system:
1. air compressor belongs to constant torque load, and namely torque is identical at various speeds, but power demand is also proportional with speed, so power demand also declines when rotating speed reduces thereupon, thus reaches energy-conservation object.
2. the pressure setting of frequency conversion air compressor can be a bit, namely can will meet the minimum pressure of manufacturing mechanism requirement as setting pressure, the trend that frequency conversion air compressor will fluctuate up and down according to ductwork pressure, regulate the speed of rotational speed of air compressor, the unloading even eliminating air compressor runs, and has saved electric energy.
3. because frequency conversion air compressor makes pipe network two-way pressure stablize, the fluctuation even eliminating pressure can be reduced, thus the air compressor of all operations in system is all run under the lower pressure meeting production requirement, decrease pressure and upwards to fluctuate the power loss caused.
4. because compressor can not get rid of long playing possibility under full load state, so, the capacity of motor can only be decided by greatest requirements, therefore design capacity is generally bigger than normal.In actual motion, the ratio shared by the time of light running is very high.As adopted frequency control of motor speed, working efficiency during operation greatly can be improved.Therefore, energy-saving potential is very large.
5. some regulative mode (as controlling opening of valve and the angle etc. changing blade), even if when demand is less, can not reduce the operate power of motor.After have employed frequency control of motor speed, when demand is less, the rotating speed of motor can be reduced, reduce the operate power of motor, thus realize energy-conservation further.
6. monomotor dragging system can not regulate according to the weight of load mostly continuously.And after have employed frequency control of motor speed, then can regulate continuously very easily, pressure, flow, temperature can be kept isoparametric stable, thus greatly improve the service behaviour of compressor.
7., according to the proficiency data that statistical analysis is grasped, this electricity-saving control system of preliminary budget power saving rate is more than 20%.
The utility model can saving power in a large number, and adopts unique space vector (SVPWM) modulation system; Simple to operate, there is keyboard lockout function, prevent misoperation; Motor running noises reduces greatly; Supply gas pressure is steady, improves pressure controling precision; The unloading number of times that adds of air compressor greatly reduces, and reduces the wearing and tearing that suction valve runs parts; There is the automatic protection functions such as overload, overvoltage, overcurrent, under-voltage, power phase shortage; Under the prerequisite ensureing lubrication, also benefit to mechanical aspects, because the rotational velocity most of the time is when running lower than when former design speed, the wearing and tearing of each rotatable parts reduce greatly, and the working life of air compressor is extended.This system adopts RHVC to realize constant pressure air feeding, and easy to use, reliable operation, system pressure is constant, has good control effects.Most importantly achieve high friendship energy-conservation, energy-saving effect can reach about 20%, simultaneously owing to adopting frequency variator to carry out soft start to motor, decreases equipment loss, extends the working life of air compressor.In sum, adopt PID Self tuning control instrument and frequency variator to be the frequency-changing pressure stabilizing air supply system that core component is formed, there is very strong practicability, be the technological innovation in air feed field, open effective approach.
More than show and describe basic principle of the present utility model and major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (5)
1. constant-pressure energy-saving air supply system, comprise air compressor, gas holder (1), PID controller (5) and frequency variator (4), it is characterized in that: described constant-pressure energy-saving air supply system also comprises pressure transmitter (8), air pressure feedback pipe (10), described air compressor comprises motor (3), first-stage cylinder (7) and secondary cylinder (2), described secondary cylinder (2) is connected with described gas holder (1) suction port by suction tude, (1) draws outlet with gas holder, this outlet is divided into two-way by tee union, one tunnel is connected with the suction valve in described first-stage cylinder (7), this road forms described air pressure feedback pipe (10), pressure transmitter (8) described in another road connects, pressure transmitter (8) is connected with described PID controller (5), PID controller (5) is connected with described frequency variator (4), frequency variator (4) controls the rotating speed of motor (3), motor (3) controls the work of first-stage cylinder (7) and secondary cylinder (2), first-stage cylinder (7) is connected by tracheae with secondary cylinder (2).
2. constant-pressure energy-saving air supply system according to claim 1, is characterized in that: described constant-pressure energy-saving air supply system also comprises warning device (6), and warning device (6) is connected with described PID controller (5).
3. constant-pressure energy-saving air supply system according to claim 2, it is characterized in that: described gas holder (1) is also provided with automatic discharge opening (9), the pressure stability of gas holder (1) can be realized by relief opening (9).
4. constant-pressure energy-saving air supply system according to claim 3, is characterized in that: described relief opening (9) regulates openings of sizes by ball valve.
5. the constant-pressure energy-saving air supply system according to claim 1 or 4, is characterized in that: described air compressor is screw compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520628544.2U CN205013263U (en) | 2015-08-19 | 2015-08-19 | Energy -conserving gas supply system of constant voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520628544.2U CN205013263U (en) | 2015-08-19 | 2015-08-19 | Energy -conserving gas supply system of constant voltage |
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| Publication Number | Publication Date |
|---|---|
| CN205013263U true CN205013263U (en) | 2016-02-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520628544.2U Expired - Fee Related CN205013263U (en) | 2015-08-19 | 2015-08-19 | Energy -conserving gas supply system of constant voltage |
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| CN (1) | CN205013263U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105569821A (en) * | 2016-03-09 | 2016-05-11 | 河南润华通用装备有限公司 | Constant-pressure air feeding device and constant-pressure air feeding control method for internal combustion engine as well as internal combustion engine with device |
| CN111043020A (en) * | 2019-12-26 | 2020-04-21 | 新奥数能科技有限公司 | Operation and maintenance monitoring method and device for air compressor |
-
2015
- 2015-08-19 CN CN201520628544.2U patent/CN205013263U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105569821A (en) * | 2016-03-09 | 2016-05-11 | 河南润华通用装备有限公司 | Constant-pressure air feeding device and constant-pressure air feeding control method for internal combustion engine as well as internal combustion engine with device |
| CN105569821B (en) * | 2016-03-09 | 2018-01-30 | 河南润华通用装备有限公司 | Internal combustion engine constant pressure air feeding device and with the internal combustion engine of the device, control method |
| CN111043020A (en) * | 2019-12-26 | 2020-04-21 | 新奥数能科技有限公司 | Operation and maintenance monitoring method and device for air compressor |
| CN111043020B (en) * | 2019-12-26 | 2021-09-24 | 新奥数能科技有限公司 | Operation and maintenance monitoring method and device for air compressor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160203 Termination date: 20170819 |