CN110500279A - Waste Heat Recovery type fuel injection helical lobe compressor control system and its control method - Google Patents
Waste Heat Recovery type fuel injection helical lobe compressor control system and its control method Download PDFInfo
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- CN110500279A CN110500279A CN201910690257.7A CN201910690257A CN110500279A CN 110500279 A CN110500279 A CN 110500279A CN 201910690257 A CN201910690257 A CN 201910690257A CN 110500279 A CN110500279 A CN 110500279A
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- evaporator
- compressor
- cpu controller
- liquid level
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- 238000002347 injection Methods 0.000 title claims abstract description 29
- 239000007924 injection Substances 0.000 title claims abstract description 29
- 239000000446 fuel Substances 0.000 title claims abstract description 28
- 239000002918 waste heat Substances 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title abstract description 5
- 238000011084 recovery Methods 0.000 title abstract description 3
- 239000007788 liquid Substances 0.000 claims abstract description 56
- 239000012530 fluid Substances 0.000 claims abstract description 38
- 238000001816 cooling Methods 0.000 claims abstract description 24
- 238000001514 detection method Methods 0.000 claims abstract description 15
- 239000010687 lubricating oil Substances 0.000 claims abstract description 15
- 238000009833 condensation Methods 0.000 claims abstract description 13
- 230000005494 condensation Effects 0.000 claims abstract description 13
- 239000007789 gas Substances 0.000 claims description 60
- 239000003921 oil Substances 0.000 claims description 52
- 238000001704 evaporation Methods 0.000 claims description 9
- 230000008020 evaporation Effects 0.000 claims description 9
- MSSNHSVIGIHOJA-UHFFFAOYSA-N pentafluoropropane Chemical group FC(F)CC(F)(F)F MSSNHSVIGIHOJA-UHFFFAOYSA-N 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 230000008676 import Effects 0.000 claims description 5
- 239000010721 machine oil Substances 0.000 claims description 5
- 239000003507 refrigerant Substances 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000010025 steaming Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000010725 compressor oil Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/28—Safety arrangements; Monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/0007—Injection of a fluid in the working chamber for sealing, cooling and lubricating
- F04C29/0014—Injection of a fluid in the working chamber for sealing, cooling and lubricating with control systems for the injection of the fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/04—Heating; Cooling; Heat insulation
- F04C29/042—Heating; Cooling; Heat insulation by injecting a fluid
Abstract
Waste Heat Recovery type fuel injection helical lobe compressor control system and its control method, its high degree of automation, good cooling results, the real-time monitoring of each cooling equipment can be achieved, it includes cpu controller U1, cpu controller U1 connection power plant module, power plant module includes compressor main motor, working medium pump, condensation fan, expand lubricating oil pump, working medium pump is used to drive the Working fluid flow of working medium fluid reservoir, compressor main motor is for driving compressor, it further includes detection module, detection module includes pressure transmitter, liquid level remote transmitter, flow remote transmitter, temperature sensor, compressor, working medium fluid reservoir, evaporator, the inside of expanding machine is mounted on pressure transmitter, liquid level remote transmitter, temperature sensor, compressor, working medium fluid reservoir, evaporator, the outlet end of expanding machine is mounted on flow teletransmission Transmitter, by above-mentioned control system in the control of the cooling system of fuel injection helical lobe compressor.
Description
Technical field
The present invention relates to fuel injection helical lobe compressor technical field, specially a kind of waste heat expansion power reclaiming type exhaust end base of oil injection threaded bolt
Compressor control system.
Background technique
Fuel injection helical lobe compressor is to be lubricated cooling to the rotor of high speed by the lubrication and cooling effect of oil, tradition
Fuel injection helical lobe compressor inside oil and compressed gas be to be realized by fan or water cooling, cooling effect is poor, and
The wind energy generated by fan is difficult to recycle, to cause unnecessary energy waste, provides a kind of benefit in the prior art
The equipment for realizing oil and compressed gas cooling with the heat-absorbing action of working medium, can solve the problem of above-mentioned cooling effect difference, still
The structure of the existing control system for the compressor is complex, and the degree of automation is lower, for the oil in compressor
The detection of the numerical value such as cooling temperature, pressure, flow of each cooling equipment is mainly by each cooling equipment with compressed gas
The modes such as upper setting thermometer, pressure gauge, flowmeter realize, and each by human eye observation's thermometer, pressure gauge, flowmeter etc.
The start stop operation of the registration control compressor of detection device, the mode of human eye observation are influenced vulnerable to subjective initiative, are misread
Several or start stop operation not in time, the problem of causing compressor not turn off in time, so that it is super to easily lead to production equipment operating temperature
The problem of crossing rated value and damaging appearance, and the working medium cooling for compressor existing in the prior art is to the oil in compressor
Point and high temperature and high pressure gas it is cooling after, the external world is directly discharged to, to cause the unnecessary wasting of resources.
Summary of the invention
It is multiple for the structure of waste heat expansion power reclaiming type fuel injection helical lobe compressor control system existing in the prior art
Miscellaneous, the degree of automation is lower, and the registration of each detection device such as human eye observation's thermometer, pressure gauge, flowmeter controls compressor
Start stop operation, the problem of easily occurring misreading several or start stop operation not in time, compressor is caused not turn off in time and the energy
The problem of consumption is big, easy waste of resource, the present invention provides a kind of waste heat expansion power reclaiming type fuel injection helical lobe compressor controls
System processed, high degree of automation, good cooling results, it can be achieved that each cooling equipment real-time monitoring, energy consumption can be reduced,
It economizes on resources.
A kind of waste heat expansion power reclaiming type fuel injection helical lobe compressor control system comprising cpu controller U1, it is described
Cpu controller U1 connection power plant module, the power plant module include compressor main motor, working medium pump, condensation fan, expansion machine oil
Pump, the working medium pump are used to drive the Working fluid flow of working medium fluid reservoir, and the compressor main motor is described for driving compressor
Expansion lubricating oil pump is used to lubricate the bearing of the expanding machine, which is characterized in that it further includes detection module, the detection module packet
Include pressure transmitter, liquid level remote transmitter, flow remote transmitter, temperature sensor, the compressor, working medium fluid reservoir,
Evaporator, expanding machine inside be respectively mounted and described have pressure transmitter, liquid level remote transmitter, temperature sensor, the compression
Machine, working medium fluid reservoir, evaporator, expanding machine outlet end be mounted on the flow remote transmitter.
It is further characterized by the pressure transmitter, liquid level remote transmitter, flow remote transmitter, temperature pass
Sensor passes through Analog input mModule respectively and connect with the input terminal of the cpu controller U1, and the working medium pump is by successively connecting
The frequency converter connect is connect with the output end of the cpu controller U1, and the output end of the cpu controller U1 is also respectively connected with described
Condensation fan, expansion lubricating oil pump, compressor main motor, evaporator, by-passing valve, admission controller；
The model S7-1200, the cpu controller U1 of the cpu controller U1 includes AD conversion module, PID adjustment module；
Working medium in the working medium fluid reservoir is refrigerant, and the refrigerant is pentafluoropropane R245fa；
The gas output end mouth of the working medium fluid reservoir is sequentially connected with evaporator, expanding machine, condenser, the condensation by pipeline
The output end of device connects the working medium fluid reservoir input terminal, is provided with side on the pipeline between the evaporator and the expanding machine
Port valve, the oil circuit and gas path pipe of the compressor pass through the evaporator, and the evaporator is for giving oil circuit gentle road pipeline
Interior oil and the high temperature and high pressure gas after compressor compresses cool down, and are equipped with the temperature on the oil circuit and gas path pipe
Sensor.
By above-mentioned control system in the control of the cooling system of fuel injection helical lobe compressor, following step is specifically included
It is rapid: it is characterized in that,
S1, the starting of system power transmission control expanding machine pump start by cpu controller U1, shut down expansion machine oil after establishing oil pressure
Pump, then starts working medium pump, until the liquid level in evaporator reaches predetermined value, shuts down working medium pump；
S2 controls compressor main motor, condensation fan, the starting for expanding machine oil, working medium pump by cpu controller U1 respectively, from
And start compressor, condenser, expanding machine；
S3 detects compressor, condenser, in evaporator by pressure transmitter, liquid level remote transmitter, temperature sensor respectively
Gas pressure, liquid level, temperature regime, and pass information to cpu controller U1；
S4, cpu controller U1 establish evaporation operating condition according to each information that step S3 is provided, and specifically include following situations:
S41, whether the liquid level in evaporator is stable in setting value, and setting value is pre-set at the data in cpu controller U1
It manages in module, judges whether the liquid level in evaporator is stable in setting value, S411, when in evaporator by data processing module
In setting value, cpu controller U1 controls by-passing valve and opens level stability, enters step S5, high-pressure working medium gas is imported swollen
In swollen machine；S412, when the liquid level in evaporator is lower than setting value, cpu controller U1 controlled medium pump startup is controlled by CPU
The frequency of PID adjustment module automatic adjustment working medium pump in device U1 processed, makes the level stability in evaporator in setting value, then
Cpu controller U1 controls by-passing valve and opens, and subsequently into step S5, high-pressure working medium gas is imported in expanding machine；S413 works as steaming
When sending out the liquid level in device and being higher than setting value, cpu controller U1 controlled medium pump stops, when the working medium in evaporator is constantly evaporated,
Liquid level is setting the level stability in evaporator lower than the frequency for automatically adjusting working medium pump after high limit by PID adjustment module
Value, then cpu controller U1 controls by-passing valve and opens, and subsequently into step S5, high pressure gas is imported in expanding machine；
Whether the oil temperature of S42, oil circuit and gas path pipe is higher than setting value, and setting value is pre-set in the number in cpu controller U1
According in processing module, judge whether the oil temperature of oil circuit and gas path pipe is higher than setting value by data processing module, S421, when
The oil temperature of oil circuit and gas path pipe is stablized in setting value, and cpu controller U1 controls by-passing valve and opens, and enters step S5, will be high
Working medium gas is pressed to import in expanding machine；S422, when the oil temperature of oil circuit and gas path pipe is higher than setting value, cpu controller U1 control
By-passing valve processed is closed, and is automatically adjusted the frequency that button adjusts working medium pump by PID adjustment module, is made the level stability in evaporator
In setting value, then cpu controller U1 controls by-passing valve and opens, and subsequently into step S5, high-pressure working medium gas is imported and is expanded
In machine；
S6, when the load of working medium pump reaches limit value, i.e., S1 ~ S4 through the above steps adjusts the evaporation operating condition in evaporator
When the temperature of section, the liquid level and oil circuit and gas path pipe that make evaporator is stablized in preset normal range (NR), entire unit
Load is completed, through the above steps S1 ~ S6, it is ensured that fuel injection helical lobe compressor can work normally.
Following beneficial effect can achieve using this control system, by this control system in fuel injection helical lobe compressor
In cooling system, pressure transmitter, liquid level teletransmission change are respectively mounted in the inside of compressor, working medium fluid reservoir, evaporator, expanding machine
Device, temperature sensor are sent, is respectively mounted flow in compressor, working medium fluid reservoir, evaporator, the outlet end of expanding machine and arrival end
Remote transmitter, by pressure transmitter, liquid level remote transmitter, temperature sensor distinguish real-time detection and acquire compressor,
Working medium fluid reservoir, evaporator, the gas pressure inside expanding machine, liquid level, temperature information, are examined in real time by flow remote transmitter
Survey acquisition compressor, working medium fluid reservoir, evaporator, the outlet end of expanding machine and arrival end flow information, pressure transmitter, liquid
Position remote transmitter, temperature sensor, flow remote transmitter be by collected gas pressure, liquid level, temperature, flow information
It is transferred to cpu controller U1, cpu controller U1 controls compressor main motor, working medium pump, expansion lubricating oil pump according to each information respectively
Start stop operation, to achieve the effect that each equipment real-time monitoring, while being controlled in evaporator by cpu controller U1
Liquid level makes level stability in setting value, so that it is guaranteed that can be to the oil in compressor by the working medium imported in working medium pump fluid reservoir
Divide and compressed gas cools down automatically, it is ensured that oil and compressed gas the temperature control of compressor in the reasonable scope, greatly improve
The degree of automation of system；The working medium of working medium fluid reservoir, can be by the swollen of expanding machine after evaporator evaporates in this system
Through enabling working medium to reuse, so as to avoid resource in condenser condensation auto-returned fluid reservoir under the action of expansive force
Waste；The detection of gas pressure in this system, liquid level, temperature and liquid level is respectively by installing pressure inverting in each equipment
Device, liquid level remote transmitter, temperature sensor, flow remote transmitter realize, when detecting that the information in some equipment is more than
When setting value, compressor can be automatically cut off by cpu controller U1, be not necessarily to each reading of human eye observation, avoid and misread number
Or start stop operation not in time caused by compressor the problem of can not turning off in time appearance.
Detailed description of the invention
Fig. 1 is system structure diagram of the invention；
Fig. 2 is the electrical schematic diagram of the power plant module in control system of the invention；
Fig. 3 is the electrical schematic diagram of the detection module in control system of the invention；
Fig. 4 is air-channel system structural block diagram of the present invention；
Fig. 5 is the step S1 ~ S3 controlled using control system of the invention the cooling system of fuel injection helical lobe compressor
Control flow chart；
Fig. 6 is the step S4 ~ S6 controlled using control system of the invention the cooling system of fuel injection helical lobe compressor
Control flow chart.
Specific embodiment
As shown in Figure 1, Figure 2, Fig. 3, Fig. 4, a kind of waste heat expansion power reclaiming type fuel injection helical lobe compressor control system comprising
Cpu controller U1, cpu controller U1 connection power plant module, power plant module include compressor main motor 11, working medium pump 21, condensation
Blower 31 expands lubricating oil pump 51, admission controller 72 is provided at the admission line of compressor 1, working medium pump 21 is for driving work
The Working fluid flow of matter fluid reservoir 2, for driving compressor 1, condensation fan 31 is used to drive condenser 3 compressor main motor 11,
Expansion lubricating oil pump 51 further includes detection module, detection module includes pressure transmitter 6, liquid level teletransmission for driving expanding machine 5
Transmitter 7, flow remote transmitter 8, temperature sensor 9, the inside of compressor 1, working medium fluid reservoir 2, evaporator 4, expanding machine 5
Be mounted on pressure transmitter 6, liquid level remote transmitter 7, temperature sensor 9, pressure transmitter 6, liquid level remote transmitter 7,
Existing detection device, compressor 1, working medium fluid reservoir 2, evaporator can be used in flow remote transmitter 8, temperature sensor 9
4, the outlet end of expanding machine 5 is mounted on flow remote transmitter 8, and pressure transmitter 6, liquid level remote transmitter 7, flow are remote
It passes transmitter 8, temperature sensor 9 to connect by Analog input mModule 10 with the input terminal of cpu controller U1 respectively, working medium pump
21 are connect by sequentially connected frequency converter 12 with the output end of cpu controller U1, and the output end of cpu controller U1 passes through respectively
Relay connects condensation fan 31, evaporator 4, expansion lubricating oil pump 51, compressor main motor 11, by-passing valve 23, admission controller
72；The model S7-1200 of cpu controller U1, cpu controller U1 include AD conversion module 13, PID adjustment module 14, working medium
Working medium in fluid reservoir 2 is refrigerant, refrigerant R245fa；
The gas output end mouth of working medium fluid reservoir 2 is sequentially connected with evaporator 4, expanding machine 5, condenser 3, condenser by pipeline 22
3 output end connects 2 input terminal of working medium fluid reservoir, is provided with by-passing valve 23 on the pipeline 22 between evaporator 4 and expanding machine 5,
The oil circuit and gas path pipe 15 of compressor 1 pass through evaporator 4, and evaporator 4 is used for the lubricating oil in the gentle road pipeline 15 of oil circuit
With the high temperature and high pressure gas cooling after compressor compresses.
See that Fig. 4, Fig. 5, Fig. 4 are the interface principle figure of cpu controller U1 and each equipment, 1 signal of pressure, which inputs, in figure is
The pressure signal in evaporator 4 that pressure transmitter 6 detects, the input of 2 signal of pressure are detected by pressure transmitter 6
Pressure signal in expanding machine 5, the input of 3 signal of pressure are the pressure signal in the condenser 3 that pressure transmitter 6 detects, pressure
The input of 4 signal of power is the pressure signal in the working medium fluid reservoir 2 that pressure transmitter 6 detects, the input of 5 signal of pressure is that pressure becomes
Signal input in the compressor 1 for sending device 6 to detect, the input of evaporator liquid level signal are to pass through liquid level remote transmitter 7 to detect
The liquid level in evaporator 4 arrived, the input of condenser liquid level signal are in the condenser 3 detected by liquid level remote transmitter 7
Liquid level signal, 1 signal of flow input for the working medium fluid reservoir 2 detected by flow remote transmitter 8 output port
Flow signal, the input of 2 signal of flow are in the oil circuit and gas path pipe 15 of the compressor detected by flow remote transmitter 8
Flow information, the input of 3 signal of flow is by between the condenser 3 detected of flow remote transmitter 8 and working medium fluid reservoir 2
Pipeline in flow information, the input of 1 signal of temperature is the temperature signal in the evaporator 4 that is detected by temperature sensor 9,
The input of 2 signal of temperature is the temperature signal in the expanding machine 5 detected by temperature sensor 9, and the input of 3 signal of temperature is to pass through
The temperature signal in condenser 3 that temperature sensor 9 detects, the input of 4 signal of temperature are detected by temperature sensor 9
Temperature signal in working medium fluid reservoir 2, the input of 5 signal of temperature are the oil circuit and gas circuit for the compressor 1 that temperature sensor 9 detects
Temperature signal in pipeline 15；AD in the prior art can be used in AD conversion module, PID adjustment module in the present embodiment respectively
Converter, PID regulator, AD conversion module are used to be converted to the analog signal of acquisition digital signal, and PID adjustment module is one
Kind automatic controller, can be used for the frequency of auto-adjustment control working medium pump.
Fig. 5, Fig. 6, it is a kind of that waste heat expansion power reclaiming type fuel injection helical lobe compressor control system is realized using above system
In evaporator liquid level method, specifically includes the following steps: it is characterized in that,
Whether S0, system resetting, detection system have the parameter in alarm condition；
S1, the starting of system power transmission control expansion lubricating oil pump 51 by cpu controller U1 and start, manually adjust expanding machine side
Pressure regulator valve establishes the oil pressure of expansion lubricating oil pump 51 to 0.4MPa, shuts down expansion lubricating oil pump 51, start working medium pump 11, until evaporation
Liquid level in device 4 is located at 300mm, shuts down working medium pump 11；
S2 controls compressor main motor 11, condensation fan 31, the starting for expanding lubricating oil pump 51 by cpu controller U1 respectively, from
And start compressor 1, condenser 3, expanding machine 5；
S3 is detected compressor 1 respectively by pressure transmitter 6, liquid level remote transmitter 7, temperature sensor 9, condenser 3, steamed
Gas pressure in device 4, liquid level, temperature regime are sent out, flow remote transmitter 8 detects the flow information in pipeline, and by information
Pass to cpu controller U1；
S4, cpu controller U1 establish evaporation operating condition according to each information that step S3 is provided, and specifically include following situations:
S41, whether the liquid level in evaporator 3 is stable in setting value, and setting value is pre-set at the data in cpu controller U1
It manages in module, judges whether the liquid level in evaporator 4 is stable in setting value, and specific: S411 works as steaming by data processing module
The level stability in device 4 is sent out in setting value, cpu controller U1 controls by-passing valve 23 and opens, and S5 is entered step, by high pressure gas
It imports in expanding machine 5；S412, when the liquid level in evaporator 3 is lower than setting value, 21 starting of cpu controller U1 controlled medium pump,
The frequency that working medium pump is automatically adjusted by the PID adjustment module in cpu controller U1, is setting the level stability in evaporator 3
Definite value, cpu controller U1 control by-passing valve 23 and open, and subsequently into step S5, high pressure gas is imported in expanding machine 5；S413,
When the liquid level in evaporator 3 is higher than setting value, cpu controller U1 controlled medium pump 21 stops, and then passes through PID adjustment module
14 regulation button adjusts the frequency of working medium pump 21, makes the level stability in evaporator 3 in setting value, cpu controller U1 control
By-passing valve 23 is opened, and subsequently into step S5, high pressure gas is imported in expanding machine 5；
Whether S42, the oil temperature in oil circuit and gas path pipe 15 are higher than setting value, and setting value is pre-set in cpu controller U1
Data processing module in, judge whether the oil temperature of oil circuit and gas path pipe 15 is higher than setting value by data processing module,
S421, when the oil temperature of oil circuit and gas path pipe 15 is stablized in setting value, cpu controller U1 controls by-passing valve 23 and opens, and enters
Step S5 imports high pressure gas in expanding machine 4；S422, when the oil temperature of oil circuit and gas path pipe 15 is higher than setting value, CPU
Controller U1 controls by-passing valve 23 and closes, and the frequency of working medium pump 21 is adjusted by the regulation button in PID adjustment module 14, makes to steam
The level stability in device 4 is sent out in setting value, subsequently into step S5, cpu controller U1 controls by-passing valve 23 and opens, by high pressure gas
Body imports in expanding machine 5；
S6, when working medium pump 21 load reach limit value, i.e., S1 ~ S4 through the above steps to the evaporation operating condition in evaporator 4 into
Row is adjusted, whole when the temperature of the liquid level and oil circuit and gas path pipe 15 that make evaporator 4 is stablized in preset normal range (NR)
A unit load is completed, through the above steps S1 ~ S6, it is ensured that the lubrication of liquid level, oil circuit and gas path pipe 15 in evaporator 4
The temperature of oil temperature and compressed gas it is stable in the reasonable scope, thus realize fuel injection helical lobe compressor oil cooling, really
Protecting fuel injection helical lobe compressor can work normally.
This system utilizes special working medium refrigerant R245fa, by the oil and pressure in fuel injection helical lobe compressor in evaporator 4
The heat absorption of contracting gas can not only achieve the purpose that cooling oil and compressed gas, and the high temperature after the heat absorption evaporation of working medium 20
High-pressure working medium 20 can push expanding machine to do work, i.e., whole system passes through S1 ~ S6 step, after the completion of loading entire unit, steam
The Working medium gas pressure sent out in device is stablized in setting value, can stop expanding lubricating oil pump, and working medium evaporation pushes expanding machine acting,
There is no need to apply external force to expanding machine again, high pressure gas of the working medium 20 after the gasification of evaporator 4 in working medium fluid reservoir 2 is swollen
Enter in working medium fluid reservoir 2 by condenser 3 automatically under the action of swollen machine 5；And the drive shaft of the compressor in the present apparatus is logical
Belt drive system is crossed to connect with expanding machine, expanding machine generate expansive force can drive belt transmission system drive compressor drive
Moving axis rotation, i.e., compressor can not only be driven by compressor main motor, when expanding machine is pushed by high temperature and pressure working medium and is done work,
It can also be run by the driving effect of expanding machine, no longer need to apply other power to compressor, therefore the energy can be greatlyd save,
This system recycles the waste heat that compressor generates and pushes expanding machine acting, since expanding machine is connect with compressor by gear,
Expanding machine acting drives compressor operation again, and compressor can be made to reach better efficiency, will can be sprayed before by this system
The efficiency of oily helical-lobe compressor is from two-stage hoisting to level-one.
Claims (6)
1. a kind of waste heat expansion power reclaiming type fuel injection helical lobe compressor control system comprising cpu controller U1, the CPU
Controller U1 connection power plant module, the power plant module include compressor main motor, working medium pump, condensation fan, expand lubricating oil pump,
The working medium pump is used to drive the Working fluid flow of working medium fluid reservoir, and the compressor main motor is for driving compressor, feature
It is, further includes detection module, the detection module includes pressure transmitter, liquid level remote transmitter, flow teletransmission pick-up
Device, temperature sensor, the compressor, working medium fluid reservoir, evaporator, expanding machine inside be respectively mounted and described have pressure inverting
Device, liquid level remote transmitter, temperature sensor, the compressor, working medium fluid reservoir, evaporator, the outlet end of expanding machine are equal
The flow remote transmitter is installed.
2. a kind of waste heat expansion power reclaiming type fuel injection helical lobe compressor control system according to claim 1, feature
It is, the pressure transmitter, liquid level remote transmitter, flow remote transmitter, that temperature sensor passes through analog quantity respectively is defeated
Enter module to connect with the input terminal of the cpu controller U1, the working medium pump is controlled by sequentially connected frequency converter and the CPU
The output end of device U1 processed connects, and the output end of the cpu controller U1 is also respectively connected with the condensation fan, evaporator, expansion
Lubricating oil pump, compressor main motor, by-passing valve, admission controller.
3. a kind of waste heat expansion power reclaiming type fuel injection helical lobe compressor control system according to claim 2, feature
It is, the model S7-1200, the cpu controller U1 of the cpu controller U1 includes AD conversion module, PID adjusting mould
Block.
4. a kind of waste heat expansion power reclaiming type fuel injection helical lobe compressor control system according to claim 3, feature
It is, the working medium in the working medium fluid reservoir is refrigerant, and the refrigerant is pentafluoropropane R245fa.
5. a kind of waste heat expansion power reclaiming type fuel injection helical lobe compressor control system according to claim 4, feature
It is, the gas output end mouth of the working medium fluid reservoir is sequentially connected with evaporator, expanding machine, condenser by pipeline, described cold
The output end of condenser connects the working medium fluid reservoir input terminal, is provided on the pipeline between the evaporator and the expanding machine
By-passing valve, the oil circuit and gas path pipe of the compressor pass through the evaporator, install on the oil circuit and gas path pipe
State temperature sensor.
6. according to claim 1 or a kind of 5 described in any item waste heat expansion power reclaiming type fuel injection helical lobe compressor controls systems
System, which is characterized in that by above-mentioned control system in the control of the cooling system of fuel injection helical lobe compressor, specifically include
Following steps: it is characterized in that,
S1, the starting of system power transmission control expanding machine pump start by cpu controller U1, shut down expansion machine oil after establishing oil pressure
Pump, then starts working medium pump, until the liquid level in evaporator reaches predetermined value, shuts down working medium pump；
S2 controls compressor main motor, condensation fan, the starting for expanding machine oil, working medium pump by cpu controller U1 respectively, from
And start compressor, condenser, expanding machine；
S3 detects compressor, condenser, in evaporator by pressure transmitter, liquid level remote transmitter, temperature sensor respectively
Gas pressure, liquid level, temperature regime, and pass information to cpu controller U1；
S4, cpu controller U1 establish evaporation operating condition according to each information that step S3 is provided, and specifically include following situations:
S41, whether the liquid level in evaporator is stable in setting value, and setting value is pre-set at the data in cpu controller U1
It manages in module, judges whether the liquid level in evaporator is stable in setting value, S411, when in evaporator by data processing module
In setting value, cpu controller U1 controls by-passing valve and opens level stability, enters step S5, high-pressure working medium gas is imported swollen
In swollen machine；S412, when the liquid level in evaporator is lower than setting value, cpu controller U1 controlled medium pump startup is controlled by CPU
The frequency of PID adjustment module automatic adjustment working medium pump in device U1 processed makes the level stability in evaporator in setting value, CPU control
Device U1 control by-passing valve processed is opened, and subsequently into step S5, high-pressure working medium gas is imported in expanding machine；S413 works as evaporator
When interior liquid level is higher than setting value, cpu controller U1 controlled medium pump stops, then when the working medium in evaporator is constantly evaporated,
Liquid level makes level stability in evaporator in setting value lower than the frequency for adjusting working medium pump after high limit by PID adjustment module,
Cpu controller U1 controls by-passing valve and opens, and subsequently into step S5, high-pressure working medium gas is imported in expanding machine；
Whether the oil temperature of S42, oil circuit and gas path pipe is higher than setting value, and setting value is pre-set in the number in cpu controller U1
According in processing module, judge whether the oil temperature of oil circuit and gas path pipe is higher than setting value by data processing module, S421, when
The oil temperature of oil circuit and gas path pipe is stablized in setting value, and cpu controller U1 controls by-passing valve and opens, and S5 is entered step, by portion
High-pressure working medium gas is divided to import in expanding machine；S422, when the oil temperature of oil circuit and gas path pipe is higher than setting value, cpu controller
U1 controls by-passing valve and closes, and the frequency of working medium pump is adjusted by the regulation button in PID adjustment module, makes the liquid level in evaporator
Stablize in setting value, cpu controller U1 controls by-passing valve and opens, and subsequently into step S5, high-pressure working medium gas is imported and is expanded
In machine；
S6, when the load of working medium pump reaches limit value, i.e., S1 ~ S4 through the above steps adjusts the evaporation operating condition in evaporator
Section, when stablizing temperature oily in the liquid level and oil circuit and gas path pipe of evaporator in preset normal range (NR), entirely
Unit load is completed, through the above steps S1 ~ S6, it is ensured that fuel injection helical lobe compressor can work normally.
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