CN104454536A - Method and system for adjusting oil amount, controller and oil-injected screw compressor - Google Patents

Method and system for adjusting oil amount, controller and oil-injected screw compressor Download PDF

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Publication number
CN104454536A
CN104454536A CN201410597507.XA CN201410597507A CN104454536A CN 104454536 A CN104454536 A CN 104454536A CN 201410597507 A CN201410597507 A CN 201410597507A CN 104454536 A CN104454536 A CN 104454536A
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CN
China
Prior art keywords
oil
temperature
fuel injection
lobe compressor
helical lobe
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CN201410597507.XA
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Chinese (zh)
Inventor
陈圣坤
何东平
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复盛实业(上海)有限公司
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Priority to CN201410597507.XA priority Critical patent/CN104454536A/en
Publication of CN104454536A publication Critical patent/CN104454536A/en

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C23/00Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/02Pumps characterised by combination with or adaptation to specific driving engines or motors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C28/00Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids

Abstract

The application provides a method and system for adjusting oil amount, a controller and an oil-injected screw compressor. Firstly the discharge temperature of compressed gas exhausted during the oil-injected screw compressor operation process is acquired, and then the discharge temperature is compared with the preset reasonable temperature range; if the discharge temperature is greater than the upper limit of the reasonable temperature range, the oil injection amount is increased; if the discharge temperature is lower than the lower limit of the reasonable temperature range, the oil injection amount is reduced; if the discharge temperature is within the reasonable temperature range, the oil injection amount is finely adjusted so as to seek the lowest point of the power dissipation under the current working condition. Because the oil amount can be adjusted based on the discharge temperature, the compressed gas accords with the temperature requirement, furthermore when the temperature accords with the requirement, the oil injection amount is finely adjusted so as to seek the lowest point of the power dissipation under the current working condition, so that the optimal working efficiency of the oil-injected screw compressor is achieved.

Description

A kind of fuel-flow control method, system, controller and fuel injection helical lobe compressor
Technical field
The present invention relates to Compressor Technology field, particularly a kind of fuel-flow control method, system, controller and fuel injection helical lobe compressor.
Background technique
Compressor (compressor) is a kind of driven fluid machinery low-pressure gas being promoted to high pressure.Compressor can be divided into piston compressor, helical-lobe compressor, centrifugal compressor etc.Compressor is obtained in multiple fields such as air conditioner refrigerating, pneumatic tool, rock drill, Hovercrafts and applies widely.
Existing fuel injection helical lobe compressor as shown in Figure 1, comprising: main frame 001, barrel of oil and gas 002, deaerator 003, gas cooler 004, oil cooler 005 and heat-operated valve 006, and this fuel injection helical lobe compressor is driven by motor 007 and carries out work.Wherein, in Fig. 1, the circulating path shown in filled arrows is the circulating path of oil in this fuel injection helical lobe compressor; Circulating path shown in Fig. 1 hollow core arrow is the circulating path of gas in this fuel injection helical lobe compressor.Operationally, gas enters from gas access in main frame 001 and is also sprayed in barrel of oil and gas 002 by main frame 001 together with oil.Under gravity, part oil falls into bottom barrel of oil and gas 002, and other oil and gas enter in deaerator 003 and is separated.Gas enters cooling in gas cooler 004 and exports through gas outlet.Separated oil falls into bottom barrel of oil and gas 002, flows through heat-operated valve 006 through pipeline.Heat-operated valve 006 perception flows through its oil temperature, when temperature is higher, controls more oil and to flow in oil cooler 005 and to be back in main frame 001 through reflux line.When the temperature is low, control more oil to be directly back in main frame 001 through reflux line.
Present inventor is realizing research discovery in process of the present invention, in existing oil-flooded screw compressors, no matter compressor operating is in which kind of operating mode, the oil mass substantially constant that it uses and constant oil filling amount cannot make fuel injection helical lobe compressor operate in optimum efficiency.
Summary of the invention
For solving the problems of the technologies described above, the embodiment of the present invention provides a kind of fuel-flow control method, system, controller and fuel injection helical lobe compressor, and to make the working efficiency of fuel injection helical lobe compressor optimum, technological scheme is as follows:
A fuel-flow control method, be applied in fuel injection helical lobe compressor, comprise the steps:
Obtain the delivery temperature of the pressurized gas of discharging when fuel injection helical lobe compressor runs;
Judge whether described delivery temperature is within the scope of default reasonable temperature;
When described delivery temperature is not within the scope of described reasonable temperature, judge that described delivery temperature is greater than the upper limit of described reasonable temperature scope or is less than the lower limit of described reasonable temperature further;
Prescribe a time limit when described delivery temperature is less than the lower of described reasonable temperature scope, reduce the oil filling amount of the lubricant oil of described fuel injection helical lobe compressor;
Prescribe a time limit when described delivery temperature is greater than the upper of described reasonable temperature, increase described oil filling amount;
When described delivery temperature is in described reasonable temperature scope, described oil filling amount is finely tuned, stop fine setting when minimum under the power consumption of described fuel injection helical lobe compressor is in current working.
Preferably, the lower limit of described reasonable temperature scope is the pressure leak source temperature of described pressurized gas, the upper limit is the SC service ceiling temperature of described lubricant oil.
Preferably, described stopping when described power consumption is in the minimum under current working is finely tuned, and comprising:
Fine setting is stopped when minimum under the driving current of described fuel injection helical lobe compressor is described current working.
A fuel-flow control system for fuel injection helical lobe compressor, is applied in fuel injection helical lobe compressor, comprises:
Delivery temperature acquisition module, for obtaining the delivery temperature of the pressurized gas of discharging when fuel injection helical lobe compressor runs;
First judge module, for judging whether described delivery temperature is within the scope of default reasonable temperature;
Second judge module, for when described delivery temperature is not within the scope of described reasonable temperature, judges that described delivery temperature is greater than the upper limit of described reasonable temperature scope or is less than the lower limit of described reasonable temperature further;
Adjustment module, prescribes a time limit for being less than the lower of described reasonable temperature scope when described delivery temperature, reduces the oil filling amount of the lubricant oil of described fuel injection helical lobe compressor; Prescribe a time limit when described delivery temperature is greater than the upper of described reasonable temperature, increase described oil filling amount;
Described adjustment module also for when described delivery temperature is in described reasonable temperature scope, is finely tuned described oil filling amount, stops fine setting when minimum under the power consumption of described fuel injection helical lobe compressor is in current working.
Preferably, described adjustment module comprises quantity control valve.
Preferably, the lower limit of described reasonable temperature scope is low pressure leak source temperature for described pressurized gas, the upper limit is the SC service ceiling temperature of described lubricant oil.
Preferably, described power consumption acquisition module is the driving current acquisition module of the drive motor of described fuel injection helical lobe compressor.
A kind of controller, is applied in fuel injection helical lobe compressor, is provided with fuel-flow control system as above.
A kind of fuel injection helical lobe compressor, comprises main frame and controller as above.
Preferably, described main frame comprises: helical-lobe compressor, barrel of oil and gas, deaerator, oil cooler, gas cooler;
Described helical-lobe compressor comprises the first suction port, return opening and gas mixture outlet, described gas mixture outlet is communicated with described barrel of oil and gas, described deaerator is provided with gas mixture import, first air outlet and the first oil outlet, described gas mixture import, described first oil outlet is communicated with described barrel of oil and gas respectively, described first air outlet is communicated with the second suction port of described gas cooler, described exhaust gas temperature sensor is arranged on described main frame air outlet, the bottom of described barrel of oil and gas is provided with the second oil outlet, described second oil outlet is communicated with the second filler opening of described oil cooler, described second oil outlet is communicated with described return opening through oil returning tube, described adjustment module is arranged on described oil returning tube.
As can be seen from technique scheme, this application provides a kind of fuel-flow control method, system, controller and fuel injection helical lobe compressor, first obtain the delivery temperature of the pressurized gas of discharging when fuel injection helical lobe compressor runs; Then delivery temperature and the reasonable temperature scope preset are compared; If delivery temperature, higher than the upper limit of reasonable temperature scope, increases oil filling amount, if delivery temperature is lower than the lower limit of reasonable temperature scope, reduce oil filling amount; If delivery temperature is within the scope of this reasonable temperature, then oil filling amount is finely tuned, find the minimum point of the power consumption under current working.Owing to can regulate oil filling amount according to delivery temperature, therefore, it is possible to make pressurized gas meet temperature requirement.And oil filling amount is finely tuned temperature is satisfactory, find the minimum point of the power consumption under current working, thus make the working efficiency of fuel injection helical lobe compressor optimum. simultaneously
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technological scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, the accompanying drawing that the following describes is only some embodiments recorded in the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of existing a kind of fuel injection helical lobe compressor;
The flow chart of a kind of fuel-flow control method that Fig. 2 provides for the embodiment of the present application;
The structural drawing of a kind of fuel-flow control system that Fig. 3 provides for another embodiment of the application;
The structural drawing of the another kind of fuel-flow control system that Fig. 4 provides for the another embodiment of the application;
The structural drawing of a kind of fuel injection helical lobe compressor that Fig. 5 provides for the another embodiment of the application;
The structural drawing of a kind of fuel injection helical lobe compressor that Fig. 6 provides for the another embodiment of the application.
Embodiment
Technological scheme in the present invention is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present invention, technological scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, should belong to the scope of protection of the invention.
Embodiment one
The flow chart of a kind of fuel-flow control method that Fig. 2 provides for the embodiment of the present application.
As shown in Figure 2, the fuel-flow control method that the embodiment of the present invention provides is applied in fuel injection helical lobe compressor, comprises the steps:
S101: the delivery temperature obtaining pressurized gas.
It will be appreciated by persons skilled in the art that can serviceability temperature sensor senses fuel injection helical lobe compressor run time institute's Exhaust Gas delivery temperature.Concrete, this temperature transducer can be arranged on the gas outlet of fuel injection helical lobe compressor.
S102: judge whether delivery temperature is within the scope of default reasonable temperature.
After previous step obtains delivery temperature, this delivery temperature and the reasonable temperature scope preset are compared, when delivery temperature is not perform step S103 when being in this reasonable temperature scope, perform step S106 when delivery temperature is in this reasonable temperature scope.
S103: the relation judging delivery temperature and reasonable temperature scope.
This step judges the relation of this delivery temperature and reasonable temperature scope further, namely specifically lower than the lower limit of reasonable temperature scope still higher than the upper limit of reasonable temperature scope, if delivery temperature, lower than the lower limit of reasonable temperature, performs step S104, if delivery temperature is higher than the upper limit of reasonable temperature scope, then perform step S105.
Wherein, the lower limit of the reasonable temperature scope pressure leak source temperature of pressurized gas of discharging for fuel injection helical lobe compressor.Pressure leak source temperature be gas under moisture content and all immovable condition of air pressure, temperature when being cooled to saturated.When delivery temperature is lower than pressure leak source temperature, the moisture in gas can be condensed into liquid water, thus oil emulsion is gone bad, and reduces the lubrication effect of bearing.Therefore temperature threshold is set to pressure leak source temperature and there is important Practical significance.
And the upper limit of reasonable temperature scope is the SC service ceiling temperature of annotated lubricant oil, after exceeding this temperature, lubricant oil may go bad because of overtemperature.
S104: the oil filling amount reducing fuel injection helical lobe compressor.
In actual applications, at oil returning tube, valve can be set to regulate oil filling amount.
S105: the oil filling amount increasing fuel injection helical lobe compressor.
Concrete, in fuel injection helical lobe compressor, the effect of oil spout mainly absorbs the heat of compression, reduction delivery temperature, lubrication, sealing, the noise reduction etc. of gas.Required best oil filling amount is determined by the thermal equilibrium demand of fuel injection helical lobe compressor.Under same operating mode, load (power) is less, and required oil filling amount is less, and load (power) is larger, and required oil filling amount is larger.When oil filling amount exceedes actual demand, the oil injected can cause extra power consumption more.Such as following A, B and C tri-kinds of situation: A, spray into more oil need to consume in compression process extra compression work (for air compressor, compressed media is air, because air dissolves degree is lower, therefore the compression of oil can be considered to wait to hold compress); B, the oil product sprayed into can make delivery temperature fall too low more, and oil viscosity reduces with temperature and increases, and cause the shearing friction loss of oil to increase; C, to spray into oil product more, and the wasted work promoting oil product motion (comprising CENTRIFUGAL ACCELERATING motion, axial motion etc.) in screw rotor operation process is higher.And the too small meeting of oil filling amount causes fuel injection helical lobe compressor delivery temperature to raise, even insufficient lubrication, also may make the stability of pressurized gas reduce, not meet the usage requirement of pressurized gas.
Therefore, according to delivery temperature to oil filling amount carry out regulate can make actual oil filling amount and fuel injection helical lobe compressor run needed for oil filling amount match, effectively can improve the working efficiency of fuel injection helical lobe compressor.
S106: oil filling amount is finely tuned.
When delivery temperature is within the scope of default reasonable temperature, oil filling amount is finely tuned, find the point least in power-consuming under current working, stop fine setting when minimum point under power consumption is in current working.Namely regulate the power consumption of complete machine under the requirement meeting delivery temperature, strive making the power consumption under this operating mode to realize minimum, this has great significance for energy-saving and emission-reduction.For power consumption, the driving current of the drive motor of this fuel injection helical lobe compressor is an index very intuitively, drops to minimum by this driving current.
As can be seen from technique scheme, present embodiments provide a kind of fuel-flow control method of fuel injection helical lobe compressor, first the method obtains the delivery temperature of the pressurized gas of discharging when fuel injection helical lobe compressor runs; Then delivery temperature and the reasonable temperature scope preset are compared; If delivery temperature, higher than the upper limit of reasonable temperature scope, increases oil filling amount, if delivery temperature is lower than the lower limit of reasonable temperature scope, reduce oil filling amount; If delivery temperature is within the scope of this reasonable temperature, then oil filling amount is finely tuned, find the minimum point of the power consumption under current working.Owing to can regulate oil filling amount according to delivery temperature, therefore, it is possible to make pressurized gas meet temperature requirement.And oil filling amount is finely tuned temperature is satisfactory, find the minimum point of the power consumption under current working, thus make the working efficiency of fuel injection helical lobe compressor optimum. simultaneously
In the fuel-flow control method of the another kind of fuel injection helical lobe compressor provided in the embodiment of the present invention, can also comprise be in operation when delivery temperature be not less than reasonable temperature scope upper in limited time, first utilize cooler to cool lubricant oil.
Be understandable that, use gas cooler can effective cooling gas, make it meet the requirements.Use oil cooler can effective cooling oil product, make it can continue to recycle.
Wherein, described oil cooler and/or described gas cooler can be Wind-cooling type cooler, also can be water-cooling type cooler.
Embodiment two
The structural drawing of a kind of fuel-flow control system that Fig. 3 provides for another embodiment of the application.
As shown in Figure 3, the fuel-flow control system that the present embodiment provides is applied in fuel injection helical lobe compressor, comprises delivery temperature acquisition module, the first comparison module, the second comparison module and adjustment module.
Delivery temperature acquisition module is for obtaining the delivery temperature of the pressurized gas of discharging when fuel injection helical lobe compressor runs.
It will be appreciated by persons skilled in the art that can serviceability temperature sensor senses fuel injection helical lobe compressor run time institute's Exhaust Gas delivery temperature.Concrete, this temperature transducer can be arranged on the gas outlet of fuel injection helical lobe compressor.
First judge module is for judging whether delivery temperature is within the scope of default reasonable temperature.
After delivery temperature acquisition module obtains delivery temperature, this delivery temperature and the reasonable temperature scope preset are compared.
Adjustment module is used for finely tuning oil filling amount when delivery temperature is in this reasonable temperature scope.
When delivery temperature is within the scope of default reasonable temperature, oil filling amount is finely tuned, find the point least in power-consuming under current working, stop fine setting when minimum point under power consumption is in current working.Namely regulate the power consumption of complete machine under the requirement meeting delivery temperature, strive making the power consumption under this operating mode to realize minimum, this has great significance for energy-saving and emission-reduction.For power consumption, the driving current of the drive motor of this fuel injection helical lobe compressor is an index very intuitively, drops to minimum by this driving current.
Second judge module is used for the relation judging delivery temperature and reasonable temperature scope when delivery temperature is not within the scope of reasonable temperature.Namely specifically lower than the lower limit of reasonable temperature scope still higher than the upper limit of reasonable temperature scope.
Wherein, the lower limit of the reasonable temperature scope pressure leak source temperature of pressurized gas of discharging for fuel injection helical lobe compressor.Pressure leak source temperature be gas under moisture content and all immovable condition of air pressure, temperature when being cooled to saturated.When delivery temperature is lower than pressure leak source temperature, the moisture in gas can be condensed into liquid water, thus oil emulsion is gone bad, and reduces the lubrication effect of bearing.Therefore temperature threshold is set to pressure leak source temperature and there is important Practical significance.
And the upper limit of reasonable temperature scope is the SC service ceiling temperature of annotated lubricant oil, after exceeding this temperature, lubricant oil may go bad because of overtemperature.
When delivery temperature is lower than the oil filling amount of the lower reduction of the adjustment module in limited time fuel injection helical lobe compressor of reasonable temperature scope.
In actual applications, at oil returning tube, valve can be set to regulate oil filling amount.
When delivery temperature is higher than the upper oil filling amount increasing fuel injection helical lobe compressor in limited time of reasonable temperature scope.
Concrete, in fuel injection helical lobe compressor, the effect of oil spout mainly absorbs the heat of compression, reduction delivery temperature, lubrication, sealing, the noise reduction etc. of gas.Required best oil filling amount is determined by the thermal equilibrium demand of fuel injection helical lobe compressor.Under same operating mode, load (power) is less, and required oil filling amount is less, and load (power) is larger, and required oil filling amount is larger.When oil filling amount exceedes actual demand, the oil injected can cause extra power consumption more.Such as following A, B and C tri-kinds of situation: A, spray into more oil need to consume in compression process extra compression work (for air compressor, compressed media is air, because air dissolves degree is lower, therefore the compression of oil can be considered to wait to hold compress); B, the oil product sprayed into can make delivery temperature fall too low more, and oil viscosity reduces with temperature and increases, and cause the shearing friction loss of oil to increase; C, to spray into oil product more, and the wasted work promoting oil product motion (comprising CENTRIFUGAL ACCELERATING motion, axial motion etc.) in screw rotor operation process is higher.And the too small meeting of oil filling amount causes fuel injection helical lobe compressor delivery temperature to raise, even insufficient lubrication, also may make the stability of pressurized gas reduce, not meet the usage requirement of pressurized gas.
Therefore, according to delivery temperature to oil filling amount carry out regulate can make actual oil filling amount and fuel injection helical lobe compressor run needed for oil filling amount match, effectively can improve the working efficiency of fuel injection helical lobe compressor.
As can be seen from technique scheme, present embodiments provide a kind of fuel-flow control system of fuel injection helical lobe compressor, first this system obtains the delivery temperature of the pressurized gas of discharging when fuel injection helical lobe compressor runs; Then delivery temperature and the reasonable temperature scope preset are compared; If delivery temperature, higher than the upper limit of reasonable temperature scope, increases oil filling amount, if delivery temperature is lower than the lower limit of reasonable temperature scope, reduce oil filling amount; If delivery temperature is within the scope of this reasonable temperature, then oil filling amount is finely tuned, find the minimum point of the power consumption under current working.Owing to can regulate oil filling amount according to delivery temperature, therefore, it is possible to make pressurized gas meet temperature requirement.And oil filling amount is finely tuned temperature is satisfactory, find the minimum point of the power consumption under current working, thus make the working efficiency of fuel injection helical lobe compressor optimum. simultaneously
Embodiment three
The present embodiment provides a kind of controller, and this controller includes the fuel-flow control system being applied to fuel injection helical lobe compressor that an embodiment provides, and the working efficiency of this fuel injection helical lobe compressor can be made optimum.
Embodiment four
The structural drawing of the another kind of fuel-flow control system that Fig. 4 provides for the another embodiment of the application.
As shown in Figure 4, the fuel-flow control system that the embodiment of the present invention provides comprises: delivery temperature acquiring unit 100, controller unit 200 and oil filling amount regulon 300, controller unit 200 is connected with delivery temperature acquiring unit 100, oil filling amount regulon 300 respectively
Delivery temperature acquiring unit 100 obtains fuel injection helical lobe compressor and runs the delivery temperature of time institute's Exhaust Gas and be sent in controller unit 200;
Delivery temperature and the temperature threshold preset compare by controller unit 200, when delivery temperature is less than temperature threshold, control the oil filling amount that fuel-flow control unit 300 reduces fuel injection helical lobe compressor, when delivery temperature is not less than temperature threshold, control the oil filling amount that fuel-flow control unit 300 increases fuel injection helical lobe compressor.
It will be appreciated by persons skilled in the art that delivery temperature acquiring unit 100 can for temperature transducer, the delivery temperature of time institute's Exhaust Gas can be run by serviceability temperature sensor senses fuel injection helical lobe compressor.Concrete, this temperature transducer can be arranged on the gas outlet of fuel injection helical lobe compressor.
Wherein, temperature threshold can be the pressure leak source temperature of gas.Pressure leak source temperature be gas under moisture content and all immovable condition of air pressure, temperature when being cooled to saturated.When delivery temperature is lower than pressure leak source temperature, the moisture in gas can be condensed into liquid water, thus oil emulsion is gone bad, and reduces the lubrication effect of bearing.Therefore temperature threshold is set to pressure leak source temperature and there is important Practical significance.
In actual applications, oil filling amount regulon 300 can be valve, can arrange valve to regulate oil filling amount at oil returning tube.
Concrete, in fuel injection helical lobe compressor, the effect of oil spout mainly absorbs the heat of compression, reduction delivery temperature, lubrication, sealing, the noise reduction etc. of gas.Required best oil filling amount is determined by the thermal equilibrium demand of fuel injection helical lobe compressor.Under same operating mode, load (power) is less, and required oil filling amount is less, and load (power) is larger, and required oil filling amount is larger.When oil filling amount exceedes actual demand, the oil injected can cause extra power consumption more.Such as following A, B and C tri-kinds of situation: A, spray into oil more and need to consume extra compression work (for air compressor, compressed media is air, because air dissolves degree is lower, can be considered to wait to hold and compresses) in compression process; B, the oil product sprayed into can make delivery temperature fall too low more, and oil viscosity reduces with temperature and increases, and cause the shearing friction loss of oil to increase; C, to spray into oil product more, and the wasted work promoting oil product motion (comprising CENTRIFUGAL ACCELERATING motion, axial motion etc.) in screw rotor operation process is higher.And the too small meeting of oil filling amount causes fuel injection helical lobe compressor delivery temperature to raise, even insufficient lubrication, also may make the stability of pressurized gas reduce, not meet the usage requirement of pressurized gas.
Therefore, according to delivery temperature to oil filling amount carry out regulate can make actual oil filling amount and fuel injection helical lobe compressor run needed for oil filling amount match, effectively can improve the working efficiency of fuel injection helical lobe compressor.
The fuel-flow control system of a kind of fuel injection helical lobe compressor that the embodiment of the present invention provides, can obtain delivery temperature when fuel injection helical lobe compressor runs and compare with the temperature threshold preset, regulating oil filling amount according to comparative result.When fuel injection helical lobe compressor is operated in high load, just need more oil filling amount, when its oil filling amount is not enough, the delivery temperature of air outlet will be caused higher.In this case, the application can increase oil filling amount, thus effectively reduces air outlet delivery temperature, makes pressurized gas meet temperature requirement.When fuel injection helical lobe compressor is operated in low-load, only need less oil filling amount, when its oil filling amount is too much, air outlet delivery temperature will be caused lower.In this case, the application can reduce oil filling amount, thus effectively reduces the power consumption of fuel injection helical lobe compressor, and can effectively prevent condensed water to be gathered in fuel injection helical lobe compressor inside.
In the fuel-flow control system of the another kind of fuel injection helical lobe compressor provided in the embodiment of the present invention, oil cooler and gas cooler can be provided with in fuel injection helical lobe compressor, when delivery temperature is not less than temperature threshold, controller unit 200 can improve the cooling effect of oil cooler and/or gas cooler.
Embodiment five
The structural drawing of a kind of fuel injection helical lobe compressor that Fig. 5 provides for the another embodiment of the application.
As shown in Figure 5, the fuel injection helical lobe compressor that the present embodiment provides comprises helical-lobe compressor 001, barrel of oil and gas 002, deaerator 003, gas cooler 004, oil cooler 005, controller 008, temperature transducer 009 and quantity control valve 010,
Helical-lobe compressor 001 is provided with the first suction port JQ1, return opening HY and gas mixture outlet CYQ, helical-lobe compressor 001 is communicated with barrel of oil and gas 002 by gas mixture outlet CYQ, barrel of oil and gas 002 top is provided with deaerator 003, deaerator 003 is provided with gas mixture import JYQ, first air outlet CQ1 and the first oil outlet CY1, gas mixture import JYQ, first oil outlet CY1 is communicated with barrel of oil and gas 002 respectively, first air outlet CQ1 is communicated with the second suction port JQ2 of gas cooler 004, temperature transducer 009 is arranged on the second air outlet CQ2 of gas cooler 004, the bottom of barrel of oil and gas 002 is provided with the second oil outlet CY2, second oil outlet CY2 is communicated with the second filler opening JY2 of oil cooler 005, 3rd oil outlet CY3 of oil cooler 005 is communicated with return opening HY through oil returning tube 011, oil returning tube 011 is provided with quantity control valve 010, quantity control valve 010 and temperature transducer 009 are connected with controller 008, controller 008 to obtain when fuel injection helical lobe compressor that temperature transducer 009 senses runs from the delivery temperature of the gas mixture outlet CYQ institute Exhaust Gas of helical-lobe compressor and delivery temperature and the reasonable temperature scope preset is compared, prescribe a time limit when delivery temperature is less than the lower of reasonable temperature scope, control the oil filling amount that quantity control valve 010 reduces fuel injection helical lobe compressor, prescribe a time limit when delivery temperature is greater than the upper of reasonable temperature scope, control the oil filling amount that quantity control valve 010 increases fuel injection helical lobe compressor.
Wherein, the lower limit of reasonable temperature scope is the pressure leak source temperature of pressurized gas.Pressure leak source temperature be gas under moisture content and all immovable condition of air pressure, temperature when being cooled to saturated.When delivery temperature is lower than pressure leak source temperature, the moisture in gas can be condensed into liquid water, thus oil emulsion is gone bad, and reduces the lubrication effect of bearing.Therefore temperature threshold is set to pressure leak source temperature and there is important Practical significance.And the upper limit of reasonable temperature scope is the serviceability temperature upper limit of lubricant oil.
Concrete, in fuel injection helical lobe compressor, the effect of oil spout mainly absorbs the heat of compression, reduction delivery temperature, lubrication, sealing, the noise reduction etc. of gas.Required best oil filling amount is determined by the thermal equilibrium demand of fuel injection helical lobe compressor.Under same operating mode, load (power) is less, and required oil filling amount is less, and load (power) is larger, and required oil filling amount is larger.When oil filling amount exceedes actual demand, the oil injected can cause extra power consumption more.Such as following A, B and C tri-kinds of situation: A, spray into oil more and need to consume extra compression work (for air compressor, compressed media is air, because air dissolves degree is lower, can be considered to wait to hold and compresses) in compression process; B, the oil product sprayed into can make delivery temperature fall too low more, and oil viscosity reduces with temperature and increases, and cause the shearing friction loss of oil to increase; C, to spray into oil product more, and the wasted work promoting oil product motion (comprising CENTRIFUGAL ACCELERATING motion, axial motion etc.) in screw rotor operation process is higher.And the too small meeting of oil filling amount causes fuel injection helical lobe compressor delivery temperature to raise, even insufficient lubrication, also may make the stability of pressurized gas reduce, not meet the usage requirement of pressurized gas.
Therefore, according to delivery temperature to oil filling amount carry out regulate can make actual oil filling amount and fuel injection helical lobe compressor run needed for oil filling amount match, effectively can improve the working efficiency of fuel injection helical lobe compressor.
In the fuel injection helical lobe compressor that the present embodiment provides, oil returning tube 011 can also be provided with oil strainer 013, as shown in Figure 6.Be understandable that, use oil strainer 013 can filter oil, improve the degree of purity of oil, thus ensure normal work and the working efficiency of fuel injection helical lobe compressor.
A kind of fuel injection helical lobe compressor that the embodiment of the present invention provides, can obtain delivery temperature when fuel injection helical lobe compressor runs and compare with the temperature threshold preset, regulating oil filling amount according to comparative result.When fuel injection helical lobe compressor is operated in high load, just need more oil filling amount, when its oil filling amount is not enough, the delivery temperature of air outlet will be caused higher.In this case, the application can increase oil filling amount, thus effectively reduces air outlet delivery temperature, makes pressurized gas meet temperature requirement.When fuel injection helical lobe compressor is operated in low-load, only need less oil filling amount, when its oil filling amount is too much, air outlet delivery temperature will be caused lower.In this case, the application can reduce oil filling amount, thus effectively reduces the power consumption of fuel injection helical lobe compressor, and can effectively prevent condensed water to be gathered in fuel injection helical lobe compressor inside.
Each embodiment in this specification all adopts the mode of going forward one by one to describe, between each embodiment identical similar part mutually see, what each embodiment stressed is the difference with other embodiments.Especially, for system embodiment, because it is substantially similar to embodiment of the method, so describe fairly simple, relevant part illustrates see the part of embodiment of the method.
It should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or control panel, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.
Below be only the specific embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (10)

1. a fuel-flow control method, is applied in fuel injection helical lobe compressor, it is characterized in that, comprise the steps:
Obtain the delivery temperature of the pressurized gas of discharging when fuel injection helical lobe compressor runs;
Judge whether described delivery temperature is within the scope of default reasonable temperature;
When described delivery temperature is not within the scope of described reasonable temperature, judge that described delivery temperature is greater than the upper limit of described reasonable temperature scope or is less than the lower limit of described reasonable temperature further;
Prescribe a time limit when described delivery temperature is less than the lower of described reasonable temperature scope, reduce the oil filling amount of the lubricant oil of described fuel injection helical lobe compressor;
Prescribe a time limit when described delivery temperature is greater than the upper of described reasonable temperature, increase described oil filling amount;
When described delivery temperature is in described reasonable temperature scope, described oil filling amount is finely tuned, stop fine setting when minimum under the power consumption of described fuel injection helical lobe compressor is in current working.
2. fuel-flow control method as claimed in claim 1, is characterized in that, the lower limit of described reasonable temperature scope is the pressure leak source temperature of described pressurized gas, SC service ceiling temperature that the upper limit is described lubricant oil.
3. fuel-flow control method as claimed in claim 1, is characterized in that, described stopping when described power consumption is in the minimum under current working is finely tuned, and comprising:
Fine setting is stopped when minimum under the driving current of described fuel injection helical lobe compressor is described current working.
4. a fuel-flow control system for fuel injection helical lobe compressor, is applied in fuel injection helical lobe compressor, it is characterized in that, comprising:
Delivery temperature acquisition module, for obtaining the delivery temperature of the pressurized gas of discharging when fuel injection helical lobe compressor runs;
First judge module, for judging whether described delivery temperature is within the scope of default reasonable temperature;
Second judge module, for when described delivery temperature is not within the scope of described reasonable temperature, judges that described delivery temperature is greater than the upper limit of described reasonable temperature scope or is less than the lower limit of described reasonable temperature further;
Adjustment module, prescribes a time limit for being less than the lower of described reasonable temperature scope when described delivery temperature, reduces the oil filling amount of the lubricant oil of described fuel injection helical lobe compressor; Prescribe a time limit when described delivery temperature is greater than the upper of described reasonable temperature, increase described oil filling amount;
Described adjustment module also for when described delivery temperature is in described reasonable temperature scope, is finely tuned described oil filling amount, stops fine setting when minimum under the power consumption of described fuel injection helical lobe compressor is in current working.
5. fuel-flow control system as claimed in claim 4, it is characterized in that, described adjustment module comprises quantity control valve.
6. fuel-flow control system as claimed in claim 4, is characterized in that, the SC service ceiling temperature that the lower limit of described reasonable temperature scope is the low pressure leak source temperature for described pressurized gas, the upper limit is described lubricant oil.
7. fuel-flow control system as claimed in claim 4, it is characterized in that, described power consumption acquisition module is the driving current acquisition module of the drive motor of described fuel injection helical lobe compressor.
8. a controller, is applied in fuel injection helical lobe compressor, it is characterized in that, is provided with the fuel-flow control system as described in any one of claim 4 ~ 7.
9. a fuel injection helical lobe compressor, is characterized in that, comprises main frame and controller as claimed in claim 8.
10. fuel injection helical lobe compressor as claimed in claim 9, it is characterized in that, described main frame comprises: helical-lobe compressor, barrel of oil and gas, deaerator, oil cooler, gas cooler;
Described helical-lobe compressor comprises the first suction port, return opening and gas mixture outlet, described gas mixture outlet is communicated with described barrel of oil and gas, described deaerator is provided with gas mixture import, first air outlet and the first oil outlet, described gas mixture import, described first oil outlet is communicated with described barrel of oil and gas respectively, described first air outlet is communicated with the second suction port of described gas cooler, described exhaust gas temperature sensor is arranged on described main frame air outlet, the bottom of described barrel of oil and gas is provided with the second oil outlet, described second oil outlet is communicated with the second filler opening of described oil cooler, described second oil outlet is communicated with described return opening through oil returning tube, described adjustment module is arranged on described oil returning tube.
CN201410597507.XA 2014-10-29 2014-10-29 Method and system for adjusting oil amount, controller and oil-injected screw compressor CN104454536A (en)

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