CN116044712B - Ionic liquid compressor capable of controlling spraying to carry out liquid supplementing cooling by piston displacement and working method thereof - Google Patents
Ionic liquid compressor capable of controlling spraying to carry out liquid supplementing cooling by piston displacement and working method thereof Download PDFInfo
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- CN116044712B CN116044712B CN202310065847.7A CN202310065847A CN116044712B CN 116044712 B CN116044712 B CN 116044712B CN 202310065847 A CN202310065847 A CN 202310065847A CN 116044712 B CN116044712 B CN 116044712B
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- 239000002608 ionic liquid Substances 0.000 title claims abstract description 85
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 64
- 239000007788 liquid Substances 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000001816 cooling Methods 0.000 title claims abstract description 29
- 238000005507 spraying Methods 0.000 title claims abstract description 27
- 230000001502 supplementing effect Effects 0.000 title claims abstract description 18
- 238000007906 compression Methods 0.000 claims abstract description 82
- 239000007921 spray Substances 0.000 claims abstract description 77
- 230000006835 compression Effects 0.000 claims abstract description 63
- 238000001514 detection method Methods 0.000 claims abstract description 20
- 239000010720 hydraulic oil Substances 0.000 claims description 14
- 230000029058 respiratory gaseous exchange Effects 0.000 claims description 8
- 238000005259 measurement Methods 0.000 claims description 3
- 239000003921 oil Substances 0.000 claims description 3
- 239000002699 waste material Substances 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 16
- 208000028659 discharge Diseases 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002637 fluid replacement therapy Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000009469 supplementation Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D31/00—Other cooling or freezing apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B31/00—Free-piston pumps specially adapted for elastic fluids; Systems incorporating such pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/06—Cooling; Heating; Prevention of freezing
- F04B39/062—Cooling by injecting a liquid in the gas to be compressed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/10—Adaptations or arrangements of distribution members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
- F04B39/122—Cylinder block
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
- F04B39/125—Cylinder heads
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Compressor (AREA)
Abstract
The invention discloses an ionic liquid compressor for performing liquid supplementing cooling by piston displacement control spraying and a working method thereof. The position of the free piston is detected by a position detection unit to determine whether the compressor body is in an expansion phase, an intake phase, a compression phase or a discharge phase. During the expansion and suction phases, the pressure and temperature in the compressor body are relatively low, so that spray cooling is not necessary; in the exhaust stage of the compressor body, if continuous spraying is performed, sprayed ionic liquid spraying can directly flow away along with exhaust, so that unnecessary waste of the ionic liquid is caused, and therefore, the nozzle is accurately controlled to spray only in the compression process of the compressor, and efficient ionic liquid filling and enhanced heat exchange in the air cylinder are realized.
Description
Technical Field
The invention belongs to the technical field of compressors, and particularly relates to an ionic liquid compressor for performing liquid supplementing cooling by piston displacement control spraying and a working method thereof.
Background
The ionic liquid compressor is a novel technology with great potential in the hydrogenation station, but the problems in two aspects mainly exist in the operation process, namely, firstly, the reciprocating oscillation of the liquid piston can cause part of ionic liquid to be mixed into hydrogen and run off along with exhaust; secondly, when monitoring the working process in the cylinder, the prior compression process has poor heat exchange effect, fails to realize ideal isothermal compression, and has larger compression power consumption.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an ionic liquid compressor for supplementing liquid and cooling by controlling spraying through piston displacement and a working method thereof, and the method for controlling spraying behavior in a specific compression process is used for realizing efficient enhanced heat exchange and ionic liquid supplementation.
The ionic liquid compressor for performing liquid supplementing cooling by piston displacement control spraying comprises a compressor body and a position detection unit, wherein a nozzle capable of spraying ionic liquid is arranged at the top of a compression chamber of the compressor body, and the position detection unit is arranged on the compressor body and used for detecting the position of a free piston of the compressor body;
when the gas in the compression chamber is compressed, the nozzle can spray ionic liquid into the compression chamber;
When the compression chamber expands, sucks and discharges air, the nozzle stops spraying the ion liquid spray into the compression chamber.
Preferably, the position detection unit adopts a distance measurement unit, and the distance measurement unit is used for detecting the position of the end part of the free piston in real time.
Preferably, the distance measuring unit comprises a reflector and a laser displacement sensor, the reflector is arranged on the free piston and on the bottom surface of the free piston, the laser displacement sensor is arranged on the compressor body, and laser emitted by the laser displacement sensor vertically irradiates on the reflector.
Preferably, the compressor body further comprises a cylinder and a hydraulic cylinder, the lower end of the cylinder is fixedly connected with the upper end of the hydraulic cylinder, the inner cavity of the cylinder is communicated with the inner cavity of the hydraulic cylinder, the free piston is arranged in a cavity formed by the inner cavity of the cylinder and the inner cavity of the hydraulic cylinder together, the upper end of the free piston is arranged in the inner cavity of the cylinder, and the lower end of the free piston is arranged in the inner cavity of the hydraulic cylinder; the air inlet valve and the air outlet valve of the compressor body are both arranged at the upper end of the air cylinder, and the nozzle is arranged at the upper end of the inner cavity of the air cylinder.
Preferably, the position detection unit is arranged in an oil cavity of the hydraulic cylinder, and the position detection unit can detect the distance between the lower end surface of the free piston and the bottom of the inner cavity of the hydraulic cylinder.
Preferably, the hydraulic cylinder is provided with a hydraulic oil inlet and a hydraulic oil outlet, the lower end of the cylinder is provided with a breathing hole, and the breathing hole is communicated with the inner cavity of the cylinder;
The upper end and the lower extreme of free piston all are equipped with piston ring supporting ring subassembly, and the upper end of free piston passes through piston ring supporting ring subassembly and seals with the inner chamber of cylinder, and the lower extreme of free piston passes through piston ring supporting ring subassembly and seals with the inner chamber of pneumatic cylinder.
Preferably, the outer wall of the cylinder is provided with heat exchange fins.
Preferably, the upper end of the cylinder is provided with a cylinder end cover, the cylinder end cover is provided with an air inlet passage, an air outlet passage and an ionic liquid passage, the air inlet passage, the air outlet passage and the ionic liquid passage are communicated with the inner cavity of the cylinder, and the nozzle is arranged at the outlet end of the ionic liquid passage;
The air inlet valve and the air outlet valve of the compressor body are respectively arranged on the air inlet passage and the air outlet passage, the air inlet valve is arranged at the inlet end of the air inlet passage, the outlet of the air inlet valve is communicated with the inlet end of the air inlet passage, the air outlet valve is arranged at the outlet end of the air outlet passage, the inlet of the air outlet valve is communicated with the outlet end of the air outlet passage, the cylinder end cover is connected with a valve pressing cover, the valve pressing cover is provided with an air inlet and an air outlet, boss structures for respectively pressing the air inlet valve and the air outlet valve are respectively arranged at the outlet end of the air inlet and the inlet end of the air outlet, and the outlet end of the air inlet and the inlet end of the air outlet are respectively communicated with the inlet of the air inlet valve and the outlet of the air outlet valve;
The air inlet valve and the air outlet valve are both check valves.
Preferably, the device further comprises a spray control unit and a liquid supply unit, wherein the liquid supply unit is connected with the nozzle and is used for supplying ionic liquid for spraying to the nozzle, and the position detection unit and the liquid supply unit are connected with the spray control unit;
When the gas in the compression chamber is compressed, the spray control unit controls the liquid supply unit to supply liquid to the nozzle, and the nozzle sprays the ionic liquid into the compression chamber;
When the compression chamber expands, sucks and discharges air, the spray control unit controls the liquid supply unit to stop supplying liquid to the nozzle.
The working method of the ionic liquid compressor for carrying out liquid supplementing cooling by piston displacement control spray comprises an expansion process, an air suction process, a compression process and an exhaust process;
In the compression process, an air inlet valve and an air outlet valve of a compressor body are closed, ionic liquid spray is sprayed into a compression chamber through a nozzle, the ionic liquid spray is utilized to cool the compression chamber, and meanwhile, the ionic liquid in the compression chamber is supplemented;
in the exhaust process, the air inlet valve is closed, the air outlet valve is opened, and the nozzle stops spraying the ionic liquid into the compression chamber;
in the expansion process, the air inlet valve is closed, the air outlet valve is closed, and the nozzle stops spraying the ionic liquid into the compression chamber;
during inspiration, the intake valve is opened and the exhaust valve is closed, and the nozzle stops injecting the ion liquid spray into the compression chamber.
The invention has the following beneficial effects:
The invention discloses an ionic liquid compressor for performing liquid supplementing cooling by piston displacement control spraying, which is characterized in that a nozzle and a position detection unit are additionally arranged on the basis of the traditional ionic liquid compressor, the nozzle is used for spraying ionic liquid into a compression chamber to strengthen heat exchange, the ionic liquid lost by exhaust in the compression chamber is supplemented, and the spraying behavior is combined with the pressure temperature rise characteristic in the compression chamber to ensure that the ionic liquid is only performed in the compression process, particularly, the start and the end of the process are determined by monitoring the position of a piston, so that the spraying is controlled. The position of the free piston can be detected by the position detection means, and whether the compressor body is in the expansion stage, the suction stage, the compression stage, or the discharge stage can be determined based on the position of the free piston. During the expansion phase and the suction phase, the pressure and temperature in the compressor body are relatively low, so that spray cooling is not necessary; in the exhaust stage of the compressor body, if spraying is continuously carried out, sprayed ionic liquid can directly flow away along with exhaust, so that unnecessary waste of the ionic liquid is caused, and therefore, the spray nozzle is required to be controlled to spray only in the gas compression process of the compressor body, and heat generated in the gas pressurization process is taken away. In conclusion, the invention solves the problems of liquid ionic liquid loss in the running process of the existing ionic liquid compressor and poor in-cylinder heat dissipation effect in the compression process.
Drawings
FIG. 1 is a schematic cross-sectional view of an ionic liquid compressor for liquid-replenishing cooling by piston displacement control spray according to the present invention.
FIG. 2 is a schematic view of an exemplary position of a piston within a cylinder according to the present invention.
Fig. 3 is a schematic diagram of nozzle behavior corresponding to the bottom position of the piston in the hydraulic cylinder according to the present invention, wherein (a) is a schematic diagram of nozzle opening instant when the compression process is about to begin at the end of the suction process, (b) is a schematic diagram of nozzle closing instant when the exhaust process is about to begin at the end of the compression process, (c) is a schematic diagram of expansion and suction process in which the piston position is the same as the piston position in (b) but the nozzle remains closed, and (d) is a schematic diagram of nozzle opening instant when the piston position is the same as the piston position in (a) at the end of the suction process.
Fig. 4 is a schematic diagram of nozzle motion control in an embodiment of the invention.
In the figure: 11-pressure valve housing, 12-air inlet, 13-air inlet, 14-air outlet, 15-air outlet, 21-cylinder end cover, 22-air inlet passage, 23-air outlet passage, 24-ionic liquid passage, 25-nozzle, 26-ionic liquid spray, 31-cylinder, 32-heat exchange fin, 33-ionic liquid, 34-breathing hole, 35-compression chamber, 41-free piston, 42-piston ring support ring assembly, 43-reflector, 51-hydraulic cylinder, 52-hydraulic oil, 53-hydraulic oil inlet and outlet, 54-laser displacement sensor, 55-sensor signal transmission passage.
Detailed Description
Hereinafter, specific embodiments of the present application will be described in detail with reference to the accompanying drawings, and according to these detailed descriptions, those skilled in the art can clearly understand the present application and can practice the present application. Features from various embodiments may be combined to obtain new implementations, or substituted for certain features from certain embodiments to obtain further preferred implementations, without departing from the principles of the application.
Referring to fig. 1, the ionic liquid compressor for performing liquid-supplementing cooling by piston displacement control spray according to the present invention comprises a compressor body, a position detection unit, wherein a nozzle 25 capable of spraying ionic liquid spray is arranged at the top of a compression chamber 35 of the compressor body, the position detection unit is arranged on the compressor body and is used for detecting the position of a free piston 41 of the compressor body, the position of the free piston can be detected by the position detection unit, and whether the compressor body is in an expansion stage, an air suction stage or a compression stage can be determined according to the position of the free piston;
referring to fig. 3, when compressing the gas in the compression chamber 35, the nozzle 25 can spray the ionic liquid spray 26 into the compression chamber, and at this time, the ionic liquid spray 26 can take away the heat generated in the pressurizing process of the gas, and at the same time, the ionic liquid is replenished into the compression chamber 35;
The nozzle 25 stops spraying the ion liquid spray 26 into the compression chamber when expansion, suction and discharge are performed in the compression chamber 35, wherein the pressure and temperature in the compressor body are relatively low during both the expansion and suction phases, so that spray cooling is not necessary; in the exhaust process, the exhaust valve 15 of the compressor body is opened, so that the ion liquid spray is prevented from directly flowing along with the exhaust gas, and unnecessary waste of the ion liquid is caused, and the spray is stopped at the moment.
Referring to fig. 1-4, the working method of the ionic liquid compressor for performing fluid replacement cooling by using piston displacement control spray comprises an expansion process, an air suction process, a compression process and an air discharge process;
In the compression process, the air inlet valve 13 and the air outlet valve 15 of the compressor body are both in a closed state, the ionic liquid spray 26 is sprayed into the compression chamber through the nozzle 25, and the ionic liquid spray 26 is utilized to cool the compression chamber. Meanwhile, the ionic liquid in the compression chamber 35 is replenished;
during the discharge, the inlet valve 13 is closed and the outlet valve 15 is opened, the nozzle 25 stops injecting the ion liquid spray 26 into the compression chamber;
during expansion, the inlet valve 13 closes and the outlet valve 15 closes, the nozzle 25 stopping injecting the ion liquid spray 26 into the compression chamber;
During inspiration, the inlet valve 13 opens and the outlet valve 15 closes, and the nozzle 25 stops injecting the ion liquid spray 26 into the compression chamber.
According to the invention, the laser displacement sensor is arranged at the bottom of the hydraulic cylinder, the free piston displacement is monitored, and the working state in the cylinder is judged through the piston position, so that the nozzle action is accurately controlled, the spraying in the cylinder is only carried out in the gas compression stage, and the cylinder is supplemented with liquid while the heat exchange is efficiently enhanced, so that the compression work is saved, the waste of ionic liquid is avoided, and the efficient and reliable liquid supplementing cooling mode for the ionic liquid compressor is realized.
Referring to fig. 1, the position detecting unit of the present invention employs a ranging unit for detecting the position of the end of the free piston 41 in real time, so that it is possible to determine whether the compressor body is in an expansion stage, an intake stage, a compression stage or an exhaust stage using the position information of the end of the free piston 41 measured by the ranging unit.
Referring to fig. 1, specifically, the distance measuring unit of the present invention includes a reflective mirror 43 and a laser displacement sensor 54, where the reflective mirror 43 is disposed on the lower end surface of the free piston 41, the laser displacement sensor 54 is disposed on the lower end of the compressor body, the laser emitted by the laser displacement sensor 54 irradiates the reflective mirror 43 vertically, the specific position of the free piston 41 can be measured by the reflective mirror 43 and the laser displacement sensor 54, and after the position calibration (i.e. the distance between the reflective mirror 43 and the laser displacement sensor 54 corresponds to the position of the free piston 41 when the compressor body is in the compression stage, the exhaust stage, the expansion stage and the suction stage), the compressor body can be judged whether in the expansion stage, the suction stage, the compression stage or the exhaust stage by the distance between the reflective mirror 43 and the laser displacement sensor 54.
Referring to fig. 1, the compressor body of the present invention further comprises a cylinder 31 and a hydraulic cylinder 51, wherein the lower end of the cylinder 31 is fixedly connected with the upper end of the hydraulic cylinder 51, the inner cavity of the cylinder 31 is communicated with the inner cavity of the hydraulic cylinder 51, the free piston 41 is arranged in a cavity formed by the inner cavity of the cylinder 31 and the inner cavity of the hydraulic cylinder 51 together, the upper end of the free piston 41 is arranged in the inner cavity of the cylinder 31, and the lower end of the free piston 41 is arranged in the inner cavity of the hydraulic cylinder 51; the intake valve 13 and the exhaust valve 15 of the compressor body are both provided at the upper end of the cylinder 31, and the nozzle 25 is provided at the upper end of the inner chamber of the cylinder 31, so that the up-and-down reciprocation of the free piston 41 can be controlled by filling and discharging oil into and from the hydraulic cylinder 51.
In the above-mentioned compressor body, the position detecting unit employs the above-mentioned distance measuring unit, and the reflector 43 is embedded in the lower end face of the free piston 41, and the laser displacement sensor 54 is embedded in the bottom face of the inner cavity of the hydraulic cylinder 51, and the reflector 43 is opposite to the laser emitting end of the laser displacement sensor 54 and perpendicular to the laser beam emitted by the laser displacement sensor 54, and the distance between the lower end face of the free piston 41 and the bottom face of the inner cavity of the hydraulic cylinder 51 can be determined by the reflector 43 and the laser displacement sensor 54, see fig. 3. The hydraulic cylinder 51 is provided with the hydraulic oil inlet and outlet 53, the hydraulic oil inlet and outlet 53 is arranged in the middle of the bottom of the hydraulic cylinder 51, the free piston 41 is similar to a dumbbell in shape, the upper end and the lower end of the free piston 41 are respectively provided with the piston ring support ring assembly 42, the upper end of the free piston 41 is sealed with the inner cavity of the cylinder 31 through the piston ring support ring assembly 42, the lower end of the free piston 41 is sealed with the inner cavity of the hydraulic cylinder 51 through the piston ring support ring assembly 42, the lower end of the cylinder 31 is provided with the breathing hole 34, the breathing hole 34 is communicated with the inner cavity of the cylinder 31, the breathing hole 34 can balance the annular cavity formed between the part between the piston ring support ring assemblies 42 at the upper end and the lower end of the free piston 41 and the inner wall of the compressor body with the external atmosphere, the resistance when the free piston 41 reciprocates is reduced, and the deformation of the compressor body caused by the heated gas in the annular cavity is prevented, and the sealing performance between the piston ring support ring assembly 42 and the cylinder 51 is reduced.
The invention also arranges the heat exchange fins 32 on the outer wall of the cylinder 31 to improve the heat exchange effect, quickly realize the cooling in the compression stage and improve the compression efficiency.
The upper end of a cylinder 31 is provided with a cylinder end cover 21, the cylinder end cover 21 is provided with an air inlet passage 22, an air outlet passage 23 and an ionic liquid passage 24, the air inlet passage 22, the air outlet passage 23 and the ionic liquid passage 24 are communicated with the inner cavity of the cylinder 31, and a nozzle 25 is arranged at the outlet end of the ionic liquid passage 24;
the air inlet valve 13 and the air outlet valve 15 of the compressor body are respectively arranged on the air inlet passage 22 and the air outlet passage 23, the air inlet valve 13 is arranged at the inlet end (upper end) of the air inlet passage 22, the outlet of the air inlet valve 13 is communicated with the inlet end of the air inlet passage 22, the air outlet valve 15 is arranged at the outlet end (upper end) of the air outlet passage 23, the inlet of the air outlet valve 15 is communicated with the outlet end of the air outlet passage 23, the cylinder end cover 21 is connected with the valve pressing cover 11, the valve pressing cover 11 is provided with the air inlet 12 and the air outlet 14, the boss structures for respectively pressing the air inlet valve 13 and the air outlet 15 are respectively arranged at the outlet end (lower end) of the air inlet 12 and the inlet end (lower end) of the air outlet 14, and the outlet end (lower end) of the air inlet 12 and the outlet of the air outlet 15 are respectively communicated with the inlet of the air inlet valve 13 and the outlet 15; the intake valve 13 and the exhaust valve 15 are both check valves.
In order to realize automatic control, the invention can also be provided with a spray control unit, a liquid supply unit for supplying ionic liquid to the nozzle 25 is connected with the inlet end (upper end) of the ionic liquid passage 24, and the position detection unit and the liquid supply unit are both connected with the spray control unit; the spray control unit can determine whether the compressor is in the expansion stage, the suction stage, the compression stage, or the discharge stage by the position information of the free piston 41 obtained by the position detection unit; when the gas in the compression chamber 35 is compressed (i.e., the compressor is in a compression stage), the spray control unit controls the liquid supply unit to supply liquid to the nozzle 25, and the nozzle 25 sprays the ion liquid spray 26 into the compression chamber;
when the compression chamber 35 expands, suctions, and discharges air, the spray control unit controls the liquid supply unit to stop supplying liquid to the nozzle 25.
Examples
Fig. 1 is a cross-sectional view of an ionic liquid compressor for liquid-replenishing cooling by piston displacement control spray according to this embodiment, which mainly includes a valve pressing cover 11, a cylinder end cover 21, a cylinder 31, a free piston 41, and a hydraulic cylinder 51; the top of the air cylinder 31 is connected with the air cylinder end cover 21 through bolts, and the bottom of the air cylinder 31 is connected with the hydraulic cylinder 51 through bolts; the pressure valve housing 11 is fixed to the top of the cylinder head cover 21 by bolts. The pressure valve cover 11 is provided with an air inlet 12 and an air outlet 14; the cylinder end cover 21 is provided with an air inlet passage 22, an air outlet passage 23 and an ionic liquid passage 24; a nozzle 25 is arranged in the middle of the bottom of the cylinder end cover 21 and is connected with the bottom of the ionic liquid passage 24; nozzle 25 sprays an ionic liquid spray 26 into cylinder 31; the outer side wall of the air cylinder 31 is provided with heat exchange fins 32, and the opposite side of the bottom of the air cylinder 31 is provided with breathing holes 34; the hydraulic cylinder 51 is internally provided with hydraulic oil 52, and the middle of the bottom of the hydraulic cylinder 51 is provided with a hydraulic oil inlet and outlet 53; a laser displacement sensor 54 is fixed at one side of the bottom of the hydraulic cylinder 51, and a sensor signal transmission path 55 is arranged below the laser displacement sensor 54; the lower part of the free piston 41 in the hydraulic cylinder 51 is filled with hydraulic oil 52, and the hydraulic oil 52 enters and exits the hydraulic cylinder 51 through a hydraulic oil inlet and outlet to control the free piston 41 to reciprocate up and down; the upper part of the free piston 41 in the cylinder 31 is covered with the ionic liquid 33; the side surface of the upper part of the free piston 41 contacted with the cylinder 31 and the side surface of the lower part of the free piston 41 contacted with the hydraulic cylinder are provided with piston ring supporting ring assemblies 42; the bottom surface of the free piston 41 is provided with a reflector 43 at a position opposite to the laser displacement sensor 54.
Fig. 2 shows several typical positions of the free piston 41 in the cylinder in this embodiment. As shown in fig. 2, the free piston 41 reciprocates up and down in the cylinder 31. The low-pressure gas having a pressure of P 1 is sucked through the intake valve 13, and the high-pressure gas having a pressure of P 2 is discharged through the exhaust valve 15. The position a is the bottom dead center of the upper end of the free piston 41, the position B is the top dead center of the upper end of the free piston 41, when the free piston 41 moves to the position C, the compression process is ended, the exhaust process is started, and the exhaust valve 15 is opened to start the exhaust.
The displacement of the free piston 41 from the a position to the B position is the stroke S 2 of the piston, the displacement of the free piston 41 from the a position to the C position is S 1, and assuming n is a multiparty process index:
The available S 1 is:
FIG. 3 is a schematic diagram of the nozzle behavior corresponding to the bottom position of the piston in the hydraulic cylinder according to the present invention. When the free piston 41 is positioned at the bottom dead center a (see (a)), the distance from the bottom of the free piston 41 to the bottom of the hydraulic oil level in the hydraulic cylinder 51 is S 0, and the position is calibrated by the laser displacement sensor 54; when the free piston 41 is located at the C position (see (b)), the bottom of the free piston 41 is located at a distance S 0+S1 from the bottom of the hydraulic oil level, and the position is calibrated by the laser displacement sensor 54.
In combination with the control schematic of the nozzle action shown in fig. 4. When the free piston 41 reaches the position a in the hydraulic cylinder 51, the free piston 41 is considered to run to the bottom dead center, the air suction process is finished, the free piston 41 starts to move upwards, the compression process starts, the laser displacement sensor 54 transmits a displacement signal S 0 to the spray control unit, and the spray control unit receives the displacement signal and then analyzes the displacement signal into a control command to control the nozzle 25 to open, so that the ionic liquid spray 26 is sprayed into the cylinder 31;
When the free piston 41 moves upwards to reach the position C, the compression process is considered to be finished, the exhaust process is started, at the moment, the laser displacement sensor 54 transmits a displacement signal S 0+S1 to the spray control unit, and the spray control unit analyzes the displacement signal into a control command after receiving the displacement signal, so as to control the nozzle 25 to be closed;
When the free piston 41 reaches the top dead center B and starts to move downwards again, the free piston still passes through the position C, the laser displacement sensor 54 still obtains a displacement signal S 0+S1, and after the laser displacement sensor 54 transmits the signal to the spray control unit, the spray control unit still analyzes the signal into a control command of "nozzle closing", but at this time, the nozzle 25 is in a closed state, so that the nozzle 25 does not change in working state at this time;
When the free piston 41 continues to move downwards to the position a, the free piston 41 is considered to run to the bottom dead center, the air suction process is finished, the free piston 41 starts to move upwards, the compression process starts, the laser displacement sensor 54 transmits the received displacement signal S 0 to the spray control unit, the spray control unit analyzes the signal, the nozzle 25 is controlled to be opened, and the nozzle 25 is opened and the ionic liquid spray 26 is sprayed into the air cylinder 31.
In summary, the ionic liquid compressor for carrying out liquid supplementing cooling by piston displacement control spray monitors the displacement of the free piston through the laser displacement sensor at the bottom, and the working state of the free piston in the cylinder is judged through the position of the free piston in the cylinder, so that the opening and closing of a nozzle at the top of the cylinder are controlled, the spray is accurately controlled in a gas compression link, the high-temperature gas in compression can be efficiently cooled, the loss of compression work is reduced, the injected ionic liquid can be effectively prevented from directly flowing along with exhaust gas, the waste of the ionic liquid is reduced, and the ionic liquid compressor is an accurate and efficient mode for carrying out liquid supplementing in the cylinder of the ionic liquid compressor and cooling compressed gas.
Claims (10)
1. The ionic liquid compressor for performing liquid supplementing cooling by piston displacement control spraying is characterized by comprising a compressor body and a position detection unit, wherein a nozzle (25) capable of spraying ionic liquid spraying is arranged at the top of a compression chamber (35) of the compressor body, and the position detection unit is arranged on the compressor body and used for detecting the position of a free piston (41) of the compressor body;
the nozzle (25) is capable of spraying an ion liquid spray (26) into the compression chamber when compressing the gas in the compression chamber (35);
when the compression chamber (35) expands, sucks and discharges air, the nozzle (25) stops injecting the ion liquid spray (26) into the compression chamber.
2. The ionic liquid compressor for liquid-replenishing cooling by piston displacement control spray according to claim 1, wherein the position detection unit adopts a distance measurement unit for detecting the position of the end of the free piston (41) in real time.
3. The ionic liquid compressor for liquid supplementing cooling by piston displacement control spray according to claim 2, wherein the distance measuring unit comprises a reflector (43) and a laser displacement sensor (54), the reflector (43) is arranged on the bottom surface of the free piston (41), the laser displacement sensor (54) is arranged on the compressor body, and laser emitted by the laser displacement sensor (54) is vertically irradiated on the reflector (43).
4. The ionic liquid compressor for liquid supplementing cooling by piston displacement control spraying according to claim 1, wherein the compressor body further comprises a cylinder (31) and a hydraulic cylinder (51), the lower end of the cylinder (31) is fixedly connected with the upper end of the hydraulic cylinder (51), the inner cavity of the cylinder (31) is communicated with the inner cavity of the hydraulic cylinder (51), the free piston (41) is arranged in a cavity formed by the inner cavity of the cylinder (31) and the inner cavity of the hydraulic cylinder (51), the upper end of the free piston (41) is arranged in the inner cavity of the cylinder (31), and the lower end of the free piston (41) is arranged in the inner cavity of the hydraulic cylinder (51); the air inlet valve (13) and the air outlet valve (15) of the compressor body are arranged at the upper end of the air cylinder (31), and the nozzle (25) is arranged at the upper end of the inner cavity of the air cylinder (31).
5. The ionic liquid compressor for liquid supplementing cooling by piston displacement control spray according to claim 4, wherein the position detection unit is arranged in an oil cavity of the hydraulic cylinder (51), and the position detection unit can detect the distance between the lower end surface of the free piston (41) and the bottom of the inner cavity of the hydraulic cylinder (51).
6. The ionic liquid compressor for liquid supplementing cooling by piston displacement control spray according to claim 4, wherein a hydraulic oil inlet and outlet (53) is arranged on the hydraulic cylinder (51), a breathing hole (34) is arranged on the lower end of the cylinder (31), and the breathing hole (34) is communicated with the inner cavity of the cylinder (31);
the upper end and the lower extreme of free piston (41) all are equipped with piston ring supporting ring subassembly (42), and the inner chamber of free piston (41) upper end and cylinder (31) are sealed through piston ring supporting ring subassembly (42), and the inner chamber of free piston (41) lower extreme and pneumatic cylinder (51) are sealed through piston ring supporting ring subassembly (42).
7. The ionic liquid compressor for liquid-replenishing cooling by piston displacement control spray according to claim 4, wherein the outer wall of the cylinder (31) is provided with heat exchanging fins (32).
8. The ionic liquid compressor for liquid supplementing cooling by piston displacement control spray according to claim 4, wherein the upper end of the cylinder (31) is provided with a cylinder end cover (21), the cylinder end cover (21) is provided with an air inlet passage (22), an air outlet passage (23) and an ionic liquid passage (24), the air inlet passage (22), the air outlet passage (23) and the ionic liquid passage (24) are communicated with the inner cavity of the cylinder (31), and the nozzle (25) is arranged at the outlet end of the ionic liquid passage (24);
An air inlet valve (13) and an air outlet valve (15) of the compressor body are respectively arranged on an air inlet passage (22) and an air outlet passage (23), the air inlet valve (13) is arranged at the inlet end of the air inlet passage (22), the outlet of the air inlet valve (13) is communicated with the inlet end of the air inlet passage (22), the air outlet valve (15) is arranged at the outlet end of the air outlet passage (23), the inlet of the air outlet valve (15) is communicated with the outlet end of the air outlet passage (23), a pressure valve cover (11) is connected with a pressure valve cover (21), the pressure valve cover (11) is provided with an air inlet (12) and an air outlet (14), boss structures for respectively pressing the air inlet valve (13) and the air outlet valve (15) are respectively arranged at the outlet end of the air inlet (12) and the inlet end of the air outlet (14), and the inlet end of the air inlet (12) and the inlet end of the air outlet (14) are respectively communicated with the inlet of the air inlet valve (13) and the outlet (15).
The air inlet valve (13) and the air outlet valve (15) are both check valves.
9. The ionic liquid compressor for liquid supplementing cooling by piston displacement control spray according to claim 1, further comprising a spray control unit and a liquid supply unit, wherein the liquid supply unit is connected with the nozzle (25), the liquid supply unit is used for supplying ionic liquid for spray to the nozzle (25), and the position detection unit and the liquid supply unit are connected with the spray control unit;
when the gas in the compression chamber (35) is compressed, the spray control unit controls the liquid supply unit to supply liquid to the nozzle (25), and the nozzle (25) sprays the ionic liquid spray (26) into the compression chamber;
when the compression chamber (35) expands, sucks and discharges air, the spray control unit controls the liquid supply unit to stop supplying liquid to the nozzle (25).
10. A method of operating an ionic liquid compressor for liquid-make-up cooling by piston displacement control spray as claimed in any one of claims 1 to 9, comprising an expansion process, an aspiration process, a compression process and an exhaust process;
In the compression process, an air inlet valve (13) and an air outlet valve (15) of the compressor body are closed, an ionic liquid spray (26) is sprayed into the compression chamber through a nozzle (25), the ionic liquid spray (26) is utilized to cool the compression chamber, and meanwhile, the ionic liquid in the compression chamber (35) is supplemented;
during the exhaust process, the air inlet valve (13) is closed, the air outlet valve (15) is opened, and the nozzle (25) stops injecting the ion liquid spray (26) into the compression chamber;
During expansion, the air inlet valve (13) is closed, the air outlet valve (15) is closed, and the nozzle (25) stops injecting the ion liquid spray (26) into the compression chamber;
during inspiration, the inlet valve (13) is opened, the outlet valve (15) is closed, and the nozzle (25) stops injecting the ion liquid spray (26) into the compression chamber.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310065847.7A CN116044712B (en) | 2023-01-16 | 2023-01-16 | Ionic liquid compressor capable of controlling spraying to carry out liquid supplementing cooling by piston displacement and working method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310065847.7A CN116044712B (en) | 2023-01-16 | 2023-01-16 | Ionic liquid compressor capable of controlling spraying to carry out liquid supplementing cooling by piston displacement and working method thereof |
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| CN116044712B true CN116044712B (en) | 2024-05-14 |
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| EP2612035A2 (en) * | 2010-08-30 | 2013-07-10 | Oscomp Systems Inc. | Compressor with liquid injection cooling |
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| CN1105103A (en) * | 1992-05-29 | 1995-07-12 | 国家电力有限公司 | Gas compressor |
| USRE37603E1 (en) * | 1992-05-29 | 2002-03-26 | National Power Plc | Gas compressor |
| US6267042B1 (en) * | 1998-08-07 | 2001-07-31 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Position detector for fluid cylinder |
| CN103492720A (en) * | 2010-08-30 | 2014-01-01 | 奥斯康普系统股份有限公司 | Compressor with liquid injection cooling |
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| Publication number | Publication date |
|---|---|
| CN116044712A (en) | 2023-05-02 |
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