CN209011890U - A kind of expanding machine oil return feeding system that can be automatically controled with regenerator - Google Patents
A kind of expanding machine oil return feeding system that can be automatically controled with regenerator Download PDFInfo
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- CN209011890U CN209011890U CN201821043516.4U CN201821043516U CN209011890U CN 209011890 U CN209011890 U CN 209011890U CN 201821043516 U CN201821043516 U CN 201821043516U CN 209011890 U CN209011890 U CN 209011890U
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Abstract
The utility model discloses a kind of expanding machine oil return feeding system that can be automatically controled with regenerator, including working cycles subsystem and for oil return subsystem, working cycles subsystem includes expanding machine, condenser, working medium pump and evaporator, it include gs-oil separator for oil return subsystem, oil storage tank, oil strainer, scavenge oil pump, regenerator, first adjusts pipeline, second adjusts pipeline, first flow regulating valve and second flow regulating valve, the exit of the entrance connection expanding machine of gs-oil separator, the entrance of the outlet connection expanding machine of regenerator, first flow regulating valve is mounted on the first adjusting pipeline, first adjusts the pipeline connection between one end and regenerator and expanding machine of pipeline, pipeline connection between the other end and gs-oil separator and oil storage tank；Second flow regulating valve installation second is adjusted on pipeline, and the both ends of the second adjusting pipeline are connect with regenerator both ends.This device structure is simple, and automation is high, and succinct efficiently duty is small, at low cost, has great application prospect.
Description
Technical field
The utility model relates to heat recovery technology field, specially a kind of expanding machine that can be automatically controled with regenerator is supplied
Oil return system.
Background technique
With the continuous deterioration of the continuous rise and environment of energy demand and energy prices, energy conservation, energy recovery are already
Development strategy as country.Key technology of the Organic Rankine Cycle (ORC) as Low and mid temperature heat recovery has become wide
The research hotspot of big scholar.Wherein, a big key equipment of the expanding machine as Organic Rankine Cycle, runnability greatly shadow
The thermal efficiency of cycle of system is rung, expanding machine is in the state to run at high speed during the work time, needs enough lubricating oil
The pair that rubs to it is lubricated, cools down and takes away the clast generated in friction process, and the oil return feeding system of expanding machine is very big
Degree on decide the working efficiency and working life of expanding machine, and by the runnability and cycling hot to entire ORC system
Efficiency has an impact.The quality of expanding machine lubricating system directly determines the operational efficiency of expanding machine, and then influences the circulation of system
Efficiency.The oil return feeding system of expanding machine cannot achieve the accurate of the charge oil pressure to expanding machine, oil temperature supplying and fuel delivery at present
Control, and without special race oil recovery system, it is poor to result in expanding machine lubricant effect, furthermore also affects in system and exchanges heat
The heat exchange efficiency of equipment.
However, more lacking about the research of expanding machine oil return feeding system at present, and traditional expanding machine is for oil return system
It unites often relatively simple, cannot achieve and accurately monitoring and control are carried out to oil temperature supplying, charge oil pressure and fuel supply flow rate.Again
Person is influenced by gs-oil separator separative efficiency, and the oil return feeding system of traditional expanding machine is reaching certain operation duration
Afterwards, a large amount of lubricating oil will enter and remain in the other component of ORC system (the predominantly heat exchanging part such as condenser, evaporator
In part), the heat exchange efficiency of each heat exchanger components is not only reduced, will also cause expanding machine for shortage of oil, and then reduces entire ORC system
Operational efficiency.When system occurs running oily serious situation, traditional expanding machine oil return feeding system can not be in system circuit
Lubricating oil carry out recycling and reusing, working medium and make-up oil can only be re-replaced, this will increase the operation of ORC system at
This, and adding up with runing time, the cycle efficieny of system also can gradually decline.
In the prior art, document relevant to expanding machine lubricating oil system is more deficient.Publication No. CN105888731A,
Apply for that the Chinese utility model patent application of entitled " a kind of Organic Rankine Cycle single-screw expander lubricating system " discloses one
Kind Organic Rankine Cycle single-screw expander lubricating system, using organic Rankine working medium and oil mixture in evaporator
It is segmented into gaseous working medium and liquid lubricant, to complete the lubricating system of Organic Rankine Cycle single-screw expander.Publication number
For CN101194084A, apply for that the Chinese utility model patent Shengong of entitled " the expanding machine lubrication in steam power system " opens
It is a kind of for generating the steam power generation system of power by using the heat for carrying out self-heat power.The system comprises be used for work
The closed circuit of fluid, and include: heat exchanger assemblies, for heating fluid under stress using the heat from the source；
Separator, the vapour phase and its liquid phase separation of the fluid for that will heat；Expanding machine, for making steam expansion to generate power；It is cold
Condenser, for being condensed to the discharge fluid from the expanding machine；Feed pump, the stream of the condensation for condenser in future
Body returns to heater；And current return circuit, for heater will to be returned to from the liquid phase of the separator.The working fluid
Liquid phase include lubricant, which dissolves in liquid phase or can be miscible with liquid phase, and arranges bearing supply passageway, use
In at least one bearing that the liquid phase pressurizeed by feed pump is delivered to the rotating element for being used for expanding machine.The above-mentioned prior art is general
Include: 1, lubricating oil is directly dissolved in working medium all over existing shortcoming, lubricating oil is transported in entire ORC system with working medium
Row, this will lead to parts of lubricating oil and is detained in each heat exchanger, not only reduce the coefficient of heat transfer of each heat exchanger components, also greatly
Increase lubricating oil uses oil mass；2, gs-oil separator is arranged between evaporator outlet and expander inlet, will make lubricating oil
It absorbs heat and heats up in evaporator, then cooled down again using oil cooler to lubricating oil, a cold heat is cancelled out each other, and energy is caused
The waste in source；3, system lacks lubricating oil monitoring system, can not accurately detect expanding machine whether oil starvation；4, oil circulating pump can not
Charge oil pressure is adjusted according to the inlet pressure of expanding machine, it is too low or excessively high to may cause oil pressure, and fuel feeding is caused to fail；It 5, can not be right
The fuel delivery of expanding machine is controlled, and will lead to expanding machine rich oil or oil starvation.
Utility model content
The shortcomings that in order to overcome the prior art to refer to, the utility model provide a kind of expansion that can be automatically controled with regenerator
Machine oil return feeding system can be mainly used in Organic Rankine Cycle, carry out accurate fuel feeding to expanding machine, and to the lubrication of system
Oil mass is monitored, and is switched to the oily take-back model of race when necessary, has been ensured the safe and highly efficient operation of expanding machine, while improving system
Thermal efficiency of cycle.
The utility model solves the used technical solution of its technical problem are as follows: a kind of expansion that can be automatically controled with regenerator
Machine oil return feeding system, including working cycles subsystem and for oil return subsystem, the working cycles subsystem includes expanding machine, oil
Gas separating device, condenser, working medium pump and evaporator, the expanding machine connect with gs-oil separator, the gs-oil separator and institute
State condenser connection, the condenser is connect with working medium pump, the working medium pump is connect with evaporator, the evaporator and expanding machine
Connection, is arranged regenerator between the working medium pump and evaporator；Described for oil return subsystem includes gs-oil separator, oil storage
Tank, oil strainer, scavenge oil pump, regenerator, first adjust pipeline, the second adjusting pipeline, first flow regulating valve and second flow
Regulating valve, the gs-oil separator are connect with oil storage tank, and the oil storage tank is connect with oil strainer, the oil strainer and oil return
Pump connection, the scavenge oil pump connect with the regenerator with the expanding machine, and the first flow regulating valve is mounted on described the
One is adjusted on pipeline, and described first adjusts the pipeline connection between one end and regenerator and the expanding machine of pipeline, the other end
Pipeline between gs-oil separator and oil storage tank is connect, and the second flow regulating valve installation second is adjusted on pipeline, described
The both ends of second adjusting pipeline are connect with regenerator both ends.
It further include having control unit, described control unit includes controller, photoelectric level inductor, the first temperature sensing
Device, second temperature sensor, first pressure sensor, second pressure sensor, the first thermocouple and the second thermocouple；The light
Electric level sensor is mounted in the oil storage tank, and first temperature sensor and first pressure sensor are mounted on expanding machine
Inlet, the second temperature sensor and second pressure sensor are mounted at expander outlet, the first thermocouple peace
Oil sump bottom loaded on the expanding machine, second the installation of TC is in the first flow regulating valve and the regenerator
Connect intersection；The photoelectric level inductor, the first temperature sensor, second temperature sensor, first pressure sensor,
The control of controller described in two pressure sensors, the first thermocouple and the second thermocouple data connection, the controller control connection
The scavenge oil pump, first flow regulating valve and second flow regulating valve.
It further include having race oil recycling control unit, the race oil recycling control unit includes the first shut-off valve, second section
Only valve and third shut-off valve, second shut-off valve are installed between the evaporator and the expanding machine, the third cut-off
Valve is installed between the expanding machine and the gs-oil separator, and first shut-off valve is installed in parallel in second shut-off valve
Arrival end and the third shut-off valve outlet end, controller control connects first shut-off valve, the second shut-off valve
With third shut-off valve.
The utility model uses judgment basis of the oil overheating degree as expanding machine fuel feeding situation, the definition of oil overheating degree
For the lubricating oil temperature in expanding machine subtract working medium under the operating pressure saturation temperature (high pressure chest expanding machine takes pressure of inspiration(Pi),
Low pressure chamber expanding machine takes pressure at expulsion), oil overheating degree is a relative value, and characterization lubricating oil exceeds the journey of its original state
Degree.Default oil overheating degree under different operating conditions is also different, can determine that under different operating conditions by following circulation experiment method
Oil overheating degree:
S1., expanding machine air extractor is set, extracts working medium/oil mixture in expanding machine, and by working medium and lubricate
Oil separation, calculates the actual solubility of lubricating oil under the operating condition；
S2. according to the running temperature of expanding machine, pressure, lubrication when solubility-Pressure/Temperature figure being taken to obtain normal fuel injection is looked into
The theoretical dissolution degree of oil；
S3. theoretical dissolution degree and actual solubility are compared, whether both is judged close to (can be true according to practical working medium situation
Determine close to range)；
If S4. the two is close, oil overheating degree is calculated, and in this, as the default oil temperature mistake of expanding machine under the operating condition
Temperature carries out S5；If the departure of the two is more than preset value, fuel delivery is adjusted, theoretical dissolution degree is close to, returns again to
S1；
S5. the operating pressure and running temperature for changing expanding machine, return to S1, carry out circulation experiment, finally draw out each work
Default oil overheating degree-Pressure/Temperature figure under condition.
The course of work of the utility model:
1, expanding machine normal fuel injection mode: when the liquid level in photoelectric level inductor detection oil storage tank is more than preset
When minimum liquid level, working cycles subsystem and for oil return subsystem work normally；Lubricating oil is flowed out from oil storage tank, by oily mistake
Enter oil pump after filter, oil pump provides recycle stream power for lubricating oil, and controller is according to first pressure sensor (expander inlet
Pressure) by changing the running frequency of oil pump to control charge oil pressure；Then, the lubricating oil for reaching default charge oil pressure is divided into two
Road enters regenerator all the way and cools down, and another way passes through first flow regulating valve, and behind regenerator exit and cooling
Lubricating oil mixed, the temperature value that controller is fed back according to the second thermocouple, adjust second flow control valve aperture, from
And the flow of lubrication for participating in heat exchange is controlled, and then realize the control of oil temperature supplying；Controller is according to default oil overheating degree-pressure
Power/hygrogram determines fuel delivery, therefore the extra lubricating oil in part comes back to oil storage tank, another portion by first flow control valve
Lubricating oil of sharing in the benefit is transported at expander inlet, secondary into the base bearing of expanding machine and each friction after mixing with working medium；Finally, complete
Entering gs-oil separator at the lubricating oil after lubrication/working medium mixture to be separated, the gaseous working medium after separation enters condenser,
Liquid lubricant returns to oil storage tank, starts new circulation；
2, oily take-back model is run: when the liquid level in photoelectric level inductor detection oil storage tank is lower than preset minimum liquid
When position, system switches to the oily take-back model of race: at this point, the controller control oil pump is shut down, meanwhile, the first shut-off valve of control is beaten
It opens, controls the second shut-off valve and third shut-off valve is closed, and working medium pump stroke increases, and increases the flow of working cycles subsystem
Greatly.It carries the working medium of lubricating oil and condenser, working medium pump, regenerator and evaporator is passed through successively with higher flow velocity, then
Enter gs-oil separator after the first shut-off valve, the lubricating oil isolated comes back to oil storage tank, and gaseous working medium then enters
Condenser, into next circulation.Since expanding machine is in off state, therefore remaining in will for the lubricating oil in oil return subsystem
Slowly it is recycled in oil storage tank.
Compared with prior art, the utility model has the beneficial effects that realizing to lubricating oil oil temperature supplying, charge oil pressure
And fuel delivery is accurately regulated and controled, it is ensured that expanding machine is steadily efficiently run under suitable fuel delivery, while making to run oil
Amount maintains lower level；In addition, can effectively be returned to the lubricating oil in other each components remained in outside expanding machine
It receives, i.e. reduction operating cost, also improves thermal efficiency of cycle；Device structure is simple, high degree of automation, saves electric power, entirely
Design is succinct efficient, and good manufacturability occupies little space, and economic cost is low, has very big future in engineering applications.
Detailed description of the invention
Fig. 1 is the overall structure block diagram for the expanding machine oil return feeding system that the utility model can be automatically controled with regenerator；
Fig. 2 is the control unit connection frame for the expanding machine oil return feeding system that the utility model can be automatically controled with regenerator
Figure；
The determination of oil overheating degree in the expanding machine oil return feeding system that Fig. 3 can be automatically controled for the utility model with regenerator
The flow diagram of method；
Fig. 4 is the work for the expanding machine oil return feeding system normal fuel injection mode that the utility model can be automatically controled with regenerator
Schematic diagram；
Fig. 5 is the work that the utility model runs oily take-back model with the expanding machine oil return feeding system that regenerator can be automatically controled
Schematic diagram.
Specific embodiment
The utility model is further detailed with reference to the accompanying drawing, arrow show media processes direction in figure.
The utility model is mainly used in Organic Rankine Cycle with the expanding machine oil return feeding system that regenerator can be automatically controled
In, accurate fuel feeding is carried out to expanding machine, and be monitored to the lubricants capacity of system, switches to the oily take-back model of race when necessary,
It has ensured the safe and highly efficient operation of expanding machine, while having improved the thermal efficiency of cycle of system.It includes working cycles subsystem and confession
Oil return subsystem, the working cycles subsystem include expanding machine 13, gs-oil separator 2, condenser 5, working medium pump 8 and evaporation
Device 11, the expanding machine 13 is connect with gs-oil separator 2, the gs-oil separator 2 is connect with the condenser 5, the condensation
Device 5 is connect with working medium pump 8, the working medium pump 8 is connect with evaporator 11, the evaporator 11 is connect with expanding machine 13, above-mentioned each
Component is sequentially connected in series the basic ORC system of composition.Regenerator 9 is set between the working medium pump 8 and evaporator 11.It is described to supply back
Oil subsystem includes gs-oil separator 2, oil storage tank 3, oil strainer 6, scavenge oil pump 7, the adjusting of regenerator 9, first pipeline, the second tune
Length of tubing, first flow regulating valve FV1 and second flow regulating valve FV2, the gs-oil separator 2 are connect with oil storage tank 3, institute
It states oil storage tank 3 to connect with oil strainer 6, the oil strainer 6 is connect with scavenge oil pump 7, the scavenge oil pump 7 and the regenerator 9
It is connect with the expanding machine 13, the first flow regulating valve FV1 is mounted on described first and adjusts on pipeline, and described first is adjusted
Pipeline connection between one end and regenerator 9 and the expanding machine 13 of pipeline, the other end and gs-oil separator 2 and oil storage tank 3
Between pipeline connection；The second flow regulating valve FV2 installation second is adjusted on pipeline, and described second adjusts the both ends of pipeline
It is connect with 9 both ends of regenerator.The regenerator 9 is with heat exchanger.It is equipped with working medium passage in the regenerator 9 and lubricating oil is logical
Road, the both ends of the grease channel are separately connected the scavenge oil pump 7 and expanding machine 13, and the both ends of the working medium passage connect respectively
Connect the working medium pump 8 and evaporator 11.The scavenge oil pump 7 is frequency conversion oil pump, is equipped with frequency converter V/F, can be by changing frequency conversion
The frequency of device realizes the regulation to fuel feeding oil pressure.The gs-oil separator 2 is mounted on the exit of the expanding machine 13, is used for
Gaseous working medium and liquid lubricant are separated.Oil storage tank 3 is located at after gs-oil separator 2, the lubrication for stocking system
Oil.The outlet of the regenerator 9 connects the inlet of the expanding machine 13, and one end of the first flow regulating valve FV1 connects
It is connected between the outlet of the regenerator 9 and the entrance of the expanding machine 13, the other end of the first flow regulating valve FV1 connects
Connect the inlet of the oil storage tank 3.The second flow regulating valve FV2 is installed in parallel in the both ends of the regenerator 9, control into
Enter the oil mass of the regenerator 9.
Wherein, the gs-oil separator 2 is equipped with sender property outlet and lubricating oil outlet, and the sender property outlet passes through working medium pipeline
The condenser 5 is connected, the lubricating oil outlet connects the oil storage tank 3；Also working medium passage and profit are equipped in the regenerator 9
Oil pathway, the both ends of the grease channel are separately connected the scavenge oil pump 7 and expanding machine 13, the both ends of the working medium passage
It is separately connected the working medium pump 8 and evaporator 11, the lubricating oil of high temperature enters in the grease channel and working medium passage of regenerator 9
Cryogenic fluid exchange heat, reduce oil temperature.
As shown in Fig. 2, further including having control unit, described control unit includes controller 1, photoelectric level inductor 4,
One temperature sensor 18, second temperature sensor 16, first pressure sensor 15, second pressure sensor 17, the first thermocouple
12 and second thermocouple 10.The photoelectric level inductor 4 is mounted in the oil storage tank 3, utilizes photoelectric level inductor 4
Photoelectric conversion principle judges whether the oil level in oil storage tank 3 reaches preset minimum oil level.First temperature sensor, 18 He
First pressure sensor 15 is mounted on the inlet of expanding machine 13, the second temperature sensor 16 and second pressure sensor
17 are mounted on the working medium pipeline in 13 exit of expanding machine, and first thermocouple 12 is installed on the oil sump bottom of the expanding machine 13
At portion's wall surface, the connection that second thermocouple 10 is installed on the first flow regulating valve FV1 and the regenerator 9 crosses
At (at the fuel feeding of expanding machine 13)；The photoelectric level inductor 4, the first temperature sensor 18, second temperature sensor 16,
One pressure sensor 15, second pressure sensor 17, the first thermocouple 12 and the second thermocouple 10 pass through encoder (data acquisition
Device) controller 1 described in 14 data connections, the control of controller 1 connects the scavenge oil pump 7, first flow regulating valve FV1 and the
Two flow control valve FV2.
Wherein, photoelectricity oil level inductor 4 is arranged at the preset minimum liquid level of oil storage tank 3, by infrared transmitter and reception
Board group at, when oil level lower than preset minimum oil level (i.e. the installation site of photoelectricity oil level inductor) when, the transmitting of infrared transmitter
Light is directed through air rather than lubricating oil, and this variation will generate electric signal, and indication 3 liquid level of oil storage tank is too low, and by electric signal
It is transmitted to encoder (data collector) 14, a starting foundation of oily mode is run as system；Scavenge oil pump 7 is mounted on regenerator
It is control foundation with the pressure of 13 inlet of expanding machine, by changing the running frequency of scavenge oil pump 7, it can be achieved that scavenge oil pump before 9
The change of 7 outlet pressure, to adapt to different operating conditions；Cooling heat exchanger of the regenerator 9 as lubricating oil, by utilizing working medium
The cooling capacity of working medium is at pump discharge with cutting oil, and the heat of lubricating oil can be used as a part of waste heat and be recycled.
It further include having race oil recycling control unit, the race oil recycling control unit includes the first shut-off valve SV1, second
Shut-off valve SV2 and third shut-off valve SV3, the second shut-off valve SV2 be installed on the evaporator 11 and the expanding machine 13 it
Between working medium pipeline on, the third shut-off valve SV3 is installed on the working medium between the expanding machine 13 and the gs-oil separator 2
On pipeline, the first shut-off valve SV1 is installed on the arrival end of the second shut-off valve SV2 with the third shut-off valve SV3's
It between outlet end, and is in be arranged in parallel with the second shut-off valve SV2 and third shut-off valve SV3.The controller 1 connects described
First shut-off valve SV1, the second shut-off valve SV2 and third shut-off valve SV3, by the first shut-off valve (can be electric check valve) SV1
With the second shut-off valve SV2, third shut-off valve (can be working medium circuit by-passing valve) SV3, gs-oil separator 2, have photoelectricity oil level
Oil storage tank 3, working medium pump 8, evaporator 11, the condenser 5 of inductor 4 constitute the race oil recycling subsystem of whole system.
As shown in figure 3, the utility model uses judgment basis of the oil overheating degree as expanding machine fuel feeding situation, oil temperature mistake
The definition of temperature is that the lubricating oil temperature in expanding machine subtracts the saturation temperature of working medium under the operating pressure (high pressure chest expanding machine takes
Pressure of inspiration(Pi), low pressure chamber expanding machine take pressure at expulsion), oil overheating degree is a relative value, and characterization lubricating oil is initial beyond it
The degree of state.Default oil overheating degree under different operating conditions is also different, can be can determine that not by following round-robin method
With the oil overheating degree under operating condition:
S1., expanding machine air extractor is set, extracts working medium/oil mixture in expanding machine, and by working medium and lubricate
Oil separation, calculates the actual solubility of lubricating oil under the operating condition；
S2. according to the running temperature of expanding machine, pressure, lubrication when solubility-Pressure/Temperature figure being taken to obtain normal fuel injection is looked into
The theoretical dissolution degree of oil；
S3. theoretical dissolution degree and actual solubility are compared, whether both is judged close to ()；
If S4. the two is close, oil overheating degree is calculated, and in this, as the default oil temperature mistake of expanding machine under the operating condition
Temperature carries out S5；If the departure of the two is more than preset value, fuel delivery is adjusted, theoretical dissolution degree is close to, returns again to
S1；
S5. the operating pressure and running temperature for changing expanding machine, return to S1, carry out cyclic test, finally draw out each work
Default oil overheating degree-Pressure/Temperature figure under condition.
The course of work of the utility model is as follows:
1, expanding machine normal fuel injection mode: as shown in figure 4, when the liquid in the photoelectric level inductor 4 detection oil storage tank 3
When position is more than preset minimum liquid level, oil supply subsystem and oil return subsystem are worked normally；Lubricating oil is flowed out from oil storage tank 3,
Enter scavenge oil pump 7 after oil strainer 6, scavenge oil pump 7 provides recycle stream power for lubricating oil, and controller 1 is according to first pressure
Sensor 18 (measurement expander inlet pressure) is by changing the running frequency of scavenge oil pump 7 to control charge oil pressure；Then, it reaches
The lubricating oil of default charge oil pressure is divided into two-way, enters regenerator 9 all the way and cools down, another way passes through first flow regulating valve
FV1, and mixed in 9 exit of regenerator with the lubricating oil after cooling, controller 1 is fed back according to the second thermocouple 10
Temperature value, adjusts the aperture of second flow control valve FV2, to control the flow of lubrication for participating in heat exchange, and then realizes fuel feeding
The control of temperature；Controller 1 determines fuel delivery according to default oil overheating degree-Pressure/Temperature figure, therefore the lubricating oil that part is extra
Oil storage tank 3 is come back to by first flow control valve FV1, another part lubricating oil is transported to 13 inlet of expanding machine, with
Base bearing and each friction for entering expanding machine 13 after working medium mixing are secondary；Finally, complete lubrication after lubricating oil/working medium mixture into
Enter gs-oil separator 2 to be separated, the gaseous working medium after separation enters condenser 5, and liquid lubricant returns to oil storage tank 3, starts
New circulation.
During expanding machine 13 is for oil return mode operation, data collector 14 is by acquiring at 13 bottom oil sump of expanding machine
Electric thermo-couple temperature value and expander outlet/inlet pressure value (depending on the type of apparent expansion machine 13, high pressure chest expanding machine 13
Take pressure of inspiration(Pi), low pressure chamber expanding machine 13 such as inlet pressure) and controller 1 is transmitted signals to, controller 1 is by operation
Oil overheating degree is obtained after reason, thus as the control foundation of fuel delivery, regulates and controls the aperture of first flow regulating valve FV1；Oil return
Pump 7 adjusts the running frequency of scavenge oil pump 7 using 13 inlet pressure of expanding machine as control foundation, expands charge oil pressure slightly above
13 inlet pressure of machine；The oil temperature supplying of lubricating oil should control between 30 DEG C -50 DEG C, therefore control system passes through heat at analysis fuel feeding
The temperature value of galvanic couple (the first thermocouple 12 and the second thermocouple 10), regulate and control second flow regulating valve FV2 aperture, control into
The lubricants capacity for entering regenerator 9 realizes the control of oil temperature supplying.
2, oily take-back model is run: as shown in figure 5, when the liquid level in the photoelectric level inductor 4 detection oil storage tank 3 is low
When preset minimum liquid level, system switches to the oily take-back model of race, and oil return subsystem stops working.At this point, the controller 1
Scavenge oil pump 7 is controlled to shut down, meanwhile, the first shut-off valve SV1 of control is opened, and is controlled the second shut-off valve SV2 and third shut-off valve SV3 and is closed
It closes, and the stroke of working medium pump 8 increases, and increases the flow of oil supply subsystem.The working medium of lubricating oil is carried with higher stream
Speed successively passes through condenser 5, working medium pump 8, regenerator 9 and evaporator 11, enters oil gas after then passing through the first shut-off valve SV1
Separator 2, the lubricating oil isolated comes back to oil storage tank 3, and gaseous working medium then enters condenser 5, into next circulation.
Since expanding machine 13 is in off state, therefore the lubricating oil remained in working cycles subsystem will slowly be recycled to oil storage tank 1
In.
Compared with prior art, the utility model has the advantage that:
1, it is provided with regenerator in 5 exit of scavenge oil pump, is lubricating oil by the cooling capacity using working medium pump exit working medium
Cooling, not only eliminates oil cooler, but also the heat released in lubricating oil temperature-fall period also can be used as one of waste heat
Divide and recycled, realizes that working medium enters the preheating before evaporator, and then reduce the heat exchange area of evaporator, improve heat exchange and imitate
Rate；
2, scavenge oil pump use frequency conversion oil pump, can auto-control charge oil pressure have to the adaptable of the various variable working condition of ORC
Prevent charge oil pressure caused by the change due to expander inlet pressure too low or too high to effect；
3, it is provided with the bypass circulation of installation second flow regulating valve FV2 on regenerator, and passes through the electricity on circuit
Dynamic regulating valve control enters the lubricants capacity of regenerator, and then controls the oil temperature supplying (generally 30-50 DEG C) of lubricating oil；
4, the bypass circulation of installation first flow regulating valve FV1 is provided at the fuel feeding of expanding machine, controller is according to number
According to the data that acquisition system is fed back, the fuel feeding situation (rich oil/oil starvation) of expanding machine is judged, to adjust electric check valve thereon
Realize the control of fuel delivery；
5, photoelectricity oil level inductor is provided on oil storage tank, when minimum oil level of the oil level in oil storage tank lower than setting,
The electric signal of generation is sent to data collector by photoelectricity oil level inductor, and triggers alarm；
6, using oil overheating degree as expanding machine rich oil/oil starvation judgment basis, the definition of oil overheating degree is oil temperature
The saturation temperature of the working medium to work at this pressure is subtracted, for characterizing the temperature value that lubricating oil exceeds original state.Oil temperature mistake
Temperature can reflect the fuel feeding situation of expanding machine relatively reasonablely；
7, it is provided with the bypass circulation of the first shut-off valve SV1 of installation on expanding machine, and passes through 3 electronic section in system
Only valve realizes the recovery operation for running oil.After controller is received from the electric signal of photoelectricity oil level inductor, race will be switched to
Oily take-back model makes the mixture of working medium and lubricating oil avoid expanding machine and is directly over by-passing valve, improves the recycling effect of lubricating oil
Rate.
As described above, the only preferred embodiment of the utility model is real when that cannot limit the utility model with this
The range applied, i.e., generally according to simple equivalence changes made by present utility model application the scope of the patents and utility model description with
Modification all still belongs in the range of the utility model patent covers.
Claims (5)
1. a kind of expanding machine oil return feeding system that can be automatically controled with regenerator, which is characterized in that including working cycles subsystem
With for oil return subsystem, the working cycles subsystem includes expanding machine, gs-oil separator, condenser, working medium pump and evaporator,
The expanding machine is connect with gs-oil separator, the gs-oil separator is connect with the condenser, the condenser and working medium pump
Connection, the working medium pump are connect with evaporator, and the evaporator is connect with expanding machine, is set between the working medium pump and evaporator
Set regenerator；It is described for oil return subsystem include gs-oil separator, oil storage tank, oil strainer, scavenge oil pump, regenerator, first adjust
Length of tubing, second adjust pipeline, first flow regulating valve and second flow regulating valve, and the gs-oil separator and oil storage tank connect
Connect, the oil storage tank is connect with oil strainer, and the oil strainer is connect with scavenge oil pump, the scavenge oil pump and the regenerator with
The expanding machine connection, the first flow regulating valve are mounted on described first and adjust on pipeline, and described first adjusts pipeline
Pipeline connection between one end and regenerator and the expanding machine, the pipeline between the other end and gs-oil separator and oil storage tank connect
It connects, the second flow regulating valve installation second is adjusted on pipeline, and described second, which adjusts the both ends of pipeline and regenerator both ends, connects
It connects.
2. a kind of expanding machine oil return feeding system that can be automatically controled with regenerator according to claim 1, which is characterized in that
The gs-oil separator is equipped with sender property outlet and lubricating oil outlet, and the sender property outlet connects the condenser, the lubricating oil
Outlet connects the oil storage tank.
3. a kind of expanding machine oil return feeding system that can be automatically controled with regenerator according to claim 1, which is characterized in that
Be equipped with working medium passage and grease channel in the regenerator, the both ends of the grease channel be separately connected the scavenge oil pump and
Expanding machine, the both ends of the working medium passage are separately connected the working medium pump and evaporator.
4. a kind of expanding machine oil return feeding system that can be automatically controled with regenerator according to claim 1, which is characterized in that
It further include having control unit, described control unit includes controller, photoelectric level inductor, the first temperature sensor, the first pressure
Force snesor, the first thermocouple and the second thermocouple；The photoelectric level inductor is mounted in the oil storage tank, and described first
Temperature sensor and first pressure sensor are mounted at expander inlet, and first the installation of TC is in the expanding machine
Oil sump bottom, second the installation of TC is in the connection intersection of the first flow regulating valve and the regenerator；It is described
Photoelectric level inductor, the first temperature sensor, first pressure sensor, the first thermocouple and the second thermocouple data connection institute
Controller control is stated, the controller control connects the scavenge oil pump, first flow regulating valve and second flow regulating valve.
5. a kind of expanding machine oil return feeding system that can be automatically controled with regenerator according to claim 4, which is characterized in that
It further include having the first shut-off valve, the second shut-off valve and third shut-off valve, second shut-off valve is installed on the evaporator and institute
It states between expanding machine, the third shut-off valve is installed between the expanding machine and the gs-oil separator, first cut-off
Valve is installed in parallel the outlet end of arrival end and the third shut-off valve in second shut-off valve, the controller control connection
First shut-off valve, the second shut-off valve and third shut-off valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821043516.4U CN209011890U (en) | 2018-07-03 | 2018-07-03 | A kind of expanding machine oil return feeding system that can be automatically controled with regenerator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108894834A (en) * | 2018-07-03 | 2018-11-27 | 广东工业大学 | The expanding machine oil return feeding system that can be monitored automatically |
| CN112392556A (en) * | 2019-08-13 | 2021-02-23 | 江苏国富氢能技术装备有限公司 | Annular turbine expansion system for low-temperature gas liquefaction |
-
2018
- 2018-07-03 CN CN201821043516.4U patent/CN209011890U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108894834A (en) * | 2018-07-03 | 2018-11-27 | 广东工业大学 | The expanding machine oil return feeding system that can be monitored automatically |
| CN108894834B (en) * | 2018-07-03 | 2024-02-02 | 广东工业大学 | Automatic monitoring expander oil supply and return system |
| CN112392556A (en) * | 2019-08-13 | 2021-02-23 | 江苏国富氢能技术装备有限公司 | Annular turbine expansion system for low-temperature gas liquefaction |
| CN112392556B (en) * | 2019-08-13 | 2024-05-03 | 江苏国富氢能技术装备股份有限公司 | Annular turbine expansion system for low-temperature gas liquefaction |
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