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WO2018181299A1 - Compresseur de gaz du type à alimentation en liquide - Google Patents

Compresseur de gaz du type à alimentation en liquide Download PDF

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Publication number
WO2018181299A1
WO2018181299A1 PCT/JP2018/012412 JP2018012412W WO2018181299A1 WO 2018181299 A1 WO2018181299 A1 WO 2018181299A1 JP 2018012412 W JP2018012412 W JP 2018012412W WO 2018181299 A1 WO2018181299 A1 WO 2018181299A1
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WO
WIPO (PCT)
Prior art keywords
compressor
liquid
gas
liquid supply
pressure
Prior art date
Application number
PCT/JP2018/012412
Other languages
English (en)
Japanese (ja)
Inventor
謙次 森田
Original Assignee
株式会社日立産機システム
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社日立産機システム filed Critical 株式会社日立産機システム
Priority to EP18777716.4A priority Critical patent/EP3604808B1/fr
Priority to CN201880019657.9A priority patent/CN110462213B/zh
Priority to US16/495,866 priority patent/US20200102950A1/en
Priority to JP2019509881A priority patent/JP6742509B2/ja
Publication of WO2018181299A1 publication Critical patent/WO2018181299A1/fr

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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
    • 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
    • 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
    • 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
    • F04B39/02—Lubrication
    • 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
    • F04B39/02—Lubrication
    • F04B39/0207—Lubrication with lubrication control systems
    • 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
    • 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
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C18/14—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C18/16—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
    • 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
    • F04C29/02—Lubrication; Lubricant separation
    • F04C29/021—Control systems for the circulation of the lubricant
    • 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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • 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
    • F04C2240/00—Components
    • F04C2240/80—Other components
    • F04C2240/81—Sensor, e.g. electronic sensor for control or 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
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/24—Level of liquid, e.g. lubricant or cooling liquid

Definitions

  • the present invention relates to a liquid supply type gas compressor provided with a gas / liquid separator, and more particularly to a liquid supply type gas compressor suitable for monitoring the liquid level in the gas / liquid separator.
  • An oil supply type air compressor that is one of liquid supply type gas compressors includes a compressor body, an oil separator, and an oil supply system (see, for example, Patent Document 1).
  • the compressor main body compresses air (gas) while injecting oil (liquid) into the compression chamber for the purpose of cooling compression heat, lubricating a compression member such as a rotor and a wrap, and sealing the compression chamber.
  • the oil separator gas-liquid separator
  • the oil supply system liquid supply system
  • a method of providing a detector for detecting the pressure at a predetermined height position in the oil separator can be considered. More specifically, in this method, for example, a threshold value that is intermediate between the air pressure and the oil pressure in the oil separator is set in advance, and it is determined whether or not the pressure detected by the detector exceeds the threshold value. It is determined whether the fluid existing at a predetermined height in the oil separator is air or oil. Thereby, it is detected whether the oil level in the oil separator is lower than a predetermined height position.
  • a method of providing a detector for detecting the temperature at a predetermined height position in the oil separator can be considered. More specifically, in this method, for example, a threshold value that is intermediate between the temperature of the air in the oil separator and the temperature of the oil is set in advance, and by determining whether the temperature detected by the detector exceeds the threshold value, It is determined whether the fluid existing at a predetermined height in the oil separator is air or oil. Thereby, it is detected whether the oil level in the oil separator is lower than a predetermined height position.
  • an optical detector for detecting the presence or absence of oil at a predetermined height position in the oil separator.
  • the oil separated from the compressed air flows down in the oil separator.
  • the oil level in the oil separator may swell. Therefore, even when the oil level in the oil separator is lower than the predetermined height position, the detector may erroneously detect because the oil continuously passes or adheres to the detector. Therefore, this method cannot be adopted.
  • the present invention has been made in view of the above matters, and an object of the present invention is to monitor the liquid level in the gas-liquid separator.
  • the present invention includes a plurality of means for solving the above-mentioned problems.
  • a compressor main body that compresses gas while injecting a liquid into a compression chamber, and a discharge from the compressor main body.
  • a liquid supply type gas compressor comprising: a gas-liquid separator that separates and stores a liquid from the compressed gas; and a liquid supply system that supplies the liquid stored in the gas-liquid separator to the compressor body.
  • An inlet side is connected to a predetermined height position of the gas-liquid separator, a sampling pipe for flowing a fluid from the predetermined height position of the gas-liquid separator by a pressure difference between the inlet side and the outlet side, and the sampling pipe
  • a detector for detecting the pressure or temperature of the flowing fluid, a determination whether the pressure or temperature detected by the detector may exceed a preset first set value, and the detector
  • the pressure or temperature is By performing at least one of the determinations as to whether or not the second set value that is set to be smaller than the set value of 1 may be less, the fluid flowing through the sampling pipe is either gas or liquid
  • a control device that determines whether or not the control device and a notification device that notifies the determination result of the control device.
  • a compressor main body that compresses gas while injecting liquid into the compression chamber
  • a gas-liquid separator that separates and stores liquid from the compressed gas discharged from the compressor main body
  • the liquid supply type gas compressor comprising a liquid supply system for supplying the liquid stored in the gas-liquid separator to the compressor body, an inlet side is connected to a predetermined height position of the gas-liquid separator.
  • a sampling pipe for flowing a fluid from a predetermined height position of the gas-liquid separator due to a pressure difference between the inlet side and the outlet side, and a downstream system connected to the outlet side of the sampling pipe on the liquid supply system A detector for detecting the pressure or temperature of the fluid flowing above, and determining whether or not the pressure or temperature detected by the detector may exceed a first preset value and detecting by the detector Pressure or temperature previously By performing at least one of the determination as to whether or not the second set value that is set to be smaller than the first set value may be reduced, the fluid flowing through the sampling pipe is out of gas and liquid.
  • the pressure or temperature of the liquid hardly pulsates (in other words, a large change that periodically increases and decreases), but when a gas is supplied to the sampling pipe, It is based on the knowledge that pulsation occurs in the pressure or temperature of gas, and it can be determined whether the fluid flowing through the sampling pipe is gas or liquid. Thereby, the liquid level height in the gas-liquid separator can be monitored.
  • FIG. 1 is a schematic diagram showing the configuration of an oil supply type air compressor in the present embodiment, and shows a state where the amount of oil stored in the oil separator is satisfied.
  • FIG. 2 is a diagram illustrating a state where the amount of oil stored in the oil separator in the present embodiment is insufficient.
  • the oil supply type air compressor of this embodiment includes a compressor main body 1, a suction system 2 connected to the suction side of the compressor main body 1, and oil connected to the discharge side of the compressor main body 1 via a discharge pipe 3.
  • the separator 4 gas-liquid separator
  • the compressed air supply system 5 compressed gas supply system
  • An oil supply system 6 liquid supply system
  • the compressor body 1, the suction system 2, the discharge pipe 3, the oil separator 4, the compressed air supply system 5, the oil supply system 6, the control device 7 and the display device 8 are the same base (base, pallet or tank).
  • the compressor unit 9 is configured by placing it on an air tank or the like.
  • the compressor unit 9 is configured as a casing having a peripheral surface and an upper surface surrounded by a panel plate.
  • the compressor body 1 has a pair of male and female screw rotors that mesh with each other and a casing that houses them, and a plurality of compression chambers are formed in the tooth grooves of the screw rotor.
  • the compression chamber moves in the axial direction of the rotor.
  • the compression chamber sucks air (gas) from the suction system 2, compresses the air, and discharges the compressed air (compressed gas) to the discharge pipe 3.
  • the compressor body 1 is configured to inject oil (liquid) into the compression chamber at any stage of the compression process, for example, immediately after the start of compression. It has become.
  • the suction system 2 includes a suction filter 10 that removes impurities in the air, and a suction throttle valve 11 that is provided on the downstream side of the suction filter 10 and can close the suction side of the compressor body 1.
  • the oil separator 4 separates oil from the compressed air discharged from the compressor body 1 by using, for example, specific gravity separation and collision separation, and stores the separated oil in the lower part.
  • the compressed air separated by the oil separator 4 is supplied to a use destination outside the unit via a compressed air supply system 5.
  • the compressed air supply system 5 is disposed on the downstream side of the pressure regulating valve (check valve) 12, the pressure regulating valve 12, and cools the compressed air, and is disposed on the downstream side of the pressure regulating valve 12.
  • a control pressure sensor 14 that detects the pressure of the air (that is, the pressure that varies depending on the amount of compressed air used). The control pressure sensor 14 outputs the detected pressure to the control device 7.
  • the oil stored in the oil separator 4 is supplied to the compression chamber via the oil supply system 6 due to the pressure difference between the oil separator 4 and the compression chamber of the compressor body 1.
  • the oil supply system 6 includes an oil cooler 15 that cools oil, a bypass pipe 16 that bypasses the oil cooler 15, a temperature control valve (three-way valve) 17 that is provided at the inlet (branch point) of the bypass pipe 16, a bypass
  • the oil filter 18 is disposed downstream of the outlet (confluence) of the pipe 16 and removes impurities in the oil.
  • the temperature control valve 17 detects the temperature of the oil and adjusts the ratio of the flow rate on the oil cooler 15 side and the flow rate on the bypass pipe 16 side according to the temperature of the oil. Thereby, the temperature of the oil supplied to the compressor body 1 is adjusted.
  • the control device 7 includes an arithmetic control unit (for example, CPU) that executes arithmetic processing and control processing in cooperation with a program, and a storage unit (for example, ROM, RAM) that stores the results of the program and arithmetic processing. is there.
  • arithmetic control unit for example, CPU
  • ROM read-only memory
  • RAM random access memory
  • the controller 7 unloads the pressure detected by the control pressure sensor 14 when the compressor main body 1 is loaded (in other words, when the suction throttle valve 11 is open). It is determined whether or not the pressure has increased until the starting pressure Pu is reached. Then, when the pressure detected by the control pressure sensor 14 becomes the unload start pressure Pu, the suction throttle valve 11 is controlled to be closed, and the compressor main body 1 is switched to no-load operation.
  • the control device 7 sets the pressure detected by the control pressure sensor 14 to a preset load return pressure Pd ( However, it is determined whether or not it has been lowered until Pd ⁇ Pu). Then, when the pressure detected by the control pressure sensor 14 becomes the load return pressure Pd, the suction throttle valve 11 is controlled to be in the open state and switched to the load operation of the compressor body 1. With the above operation switching, when the amount of compressed air used is reduced, the power consumption can be reduced.
  • the oil supply type air compressor has an inlet side corresponding to a predetermined height position H of the oil separator 4 (specifically, for example, a desired oil storage amount when the compressor is driven).
  • a sampling pipe 19 connected to the upstream side of the oil filter 18 of the oil supply system 6 and a pressure sensor 20 (detector) for detecting the pressure of the fluid flowing through the sampling pipe 19. ).
  • the sampling pipe 19 has a smaller cross-sectional area than the pipe of the oil supply system 6 so that the flow rate is smaller than that of the oil supply system 6, but the present invention is not limited to this.
  • the pressure sensor 20 outputs the detected pressure to the control device 7.
  • the control device 7 functions as an oil level height detection function during the load operation of the compressor body 1 (in other words, when the oil level in the oil separator 4 is lower than during the no-load operation of the compressor body 1). Determination of whether or not the pressure detected by the pressure sensor 20 may be outside the preset setting range (in other words, whether or not the preset pressure P1 may be exceeded) By determining whether the fluid flowing through the sampling pipe 19 is air or oil (or which is main). The determination is made, and the determination result is output to the display device 8. The display device 8 notifies the determination result of the control device 7.
  • the sampling pipe 19 Oil flows.
  • the oil pressure detected by the pressure sensor 20 does not pulsate and is within the set range (in other words, the set value P1 or less and the set value P2 or more). Therefore, the control device 7 determines that the fluid flowing through the sampling pipe 19 is oil. Thereby, it can be detected that the oil level in the oil separator 4 is higher than the predetermined height position H.
  • the display device 8 uses, for example, “alarm: insufficient lubricating oil” or “alarm: lubricating oil” as notification information based on the determination result. Please replenish "message. Further, the display device 8 may input a determination result that the fluid flowing through the sampling pipe 19 is oil, and displays, for example, a “lubricating oil sufficient” message as information based on the determination result. Also good. In addition, these alerting
  • reporting methods may be various modes which combined sound, vibration, or these.
  • the control device 7 determines whether or not the pressure detected by the pressure sensor 20 may be outside the set range (in other words, the pressure detected by the pressure sensor 20 is the set value). By determining whether or not the value may exceed P1 and determining whether or not the value may be less than the set value P2, the fluid flowing through the sampling pipe 19 may be either air or oil (or which is the main).
  • the present invention is not limited to this, and modifications can be made without departing from the spirit and technical idea of the present invention.
  • control device 7 is one of the determination of whether the pressure detected by the pressure sensor 20 may exceed the set value P1 and the determination of whether the pressure may be below the set value P2. It may be determined whether the fluid flowing through the sampling pipe 19 is air or oil (or which is the main). Even in such a modification, the same effect as described above can be obtained.
  • the control device 7 determines whether the frequency at which the pressure detected by the pressure sensor 20 exceeds the set value P1 is greater than a predetermined value and the pressure detected by the pressure sensor 20 sets the set value P2. Even if it determines whether the fluid which flows into sampling piping 19 is one of air and oil (or which is the main) by performing one or both of the judgment of whether the frequency which falls below is more than a predetermined value Good. Even in such a modification, the same effect as described above can be obtained.
  • the control device 7 calculates a rate of change in pressure detected by the pressure sensor 20 (specifically, for example, the rate of change of pressure obtained at each detection time interval of the pressure sensor 20). Sampling piping by performing one or both of determining whether the rate of change may exceed a preset positive set value and determining whether the rate of change may be below a preset negative set value You may determine whether the fluid which flows to 19 is air (or which is main) among air and oil. Even in such a modification, the same effect as described above can be obtained.
  • FIG. 5 is a schematic diagram showing the configuration of the oil-filled compressor in the present embodiment.
  • the main difference in configuration from the first embodiment is that the sampling pipe 19A in the second embodiment has an outlet side connected to the upstream side of the temperature control valve 17 on the oil supply system 6.
  • the pressure sensor 20 is arranged on the oil supply system 6 downstream from the outlet of the sampling pipe 19A (in the present embodiment, downstream from the outlet of the bypass pipe 16). That is, the second embodiment is characterized in that not the pressure pulsation of the sampling pipe 19A but the pressure pulsation generated in the oil supply system 6 by the sampling pipe 19A is detected.
  • the sampling pipe 19A is changed as in the first embodiment. Air flows into the oil supply system 6 through the air supply system 6. That is, air, oil, or a mixed fluid thereof flows through the bypass pipe 16 and pressure pulsation occurs. This change in pulsation is detected by the pressure sensor 20 as in the first embodiment, and the control device can detect the height of the oil level.
  • connection structure of the sampling pipe 19A may be the same as that of the first embodiment. .
  • the same effects as those of the first embodiment and its modifications can be obtained.
  • the size of the sampling pipe 19A is reduced, and it is possible to expect effects such as simplification of the pipe configuration and reduction of member costs.
  • FIG. 6 is a schematic diagram showing the configuration of the oil supply type air compressor in the present embodiment, and shows a state where the oil storage amount in the oil separator 4 is satisfied.
  • FIG. 7 is a diagram illustrating a state where the amount of oil stored in the oil separator 4 in the present embodiment is insufficient.
  • the oil supply type air compression of this embodiment includes a temperature sensor 21 (detector) that detects the temperature of the fluid flowing through the sampling pipe 19 in place of the pressure sensor 20.
  • the temperature sensor 21 outputs the detected temperature to the control device 7A.
  • the control device 7A determines whether the temperature detected by the temperature sensor 21 may fall outside the preset setting range during the load operation of the compressor body 1 (in other words, Sampling by performing a determination as to whether or not the preset set value T1 may be exceeded and a preset set value T2 (however, whether or not the preset value T2 may be less than T1) may be sampled. It is determined whether the fluid flowing through the pipe 19 is air or oil, and the determination result is output to the display device 8.
  • the control device 7A determines that the fluid flowing through the sampling pipe 19 is oil. Thereby, it can be detected that the oil level in the oil separator 4 is higher than the predetermined height position H.
  • the display device 8 supplies, for example, “alarm: insufficient lubricating oil” or “alarm: lubricating oil” as information based on the determination result. Please display “message etc. Further, the display device 8 may input a determination result that the fluid flowing through the sampling pipe 19 is oil, and displays, for example, a “lubricating oil sufficient” message as information based on the determination result. Also good.
  • the control device 7A determines whether or not the temperature detected by the temperature sensor 21 may be outside the set range (in other words, the temperature detected by the temperature sensor 21 is the set value). By performing both the determination of whether or not T1 may be exceeded and the determination of whether or not the set value T2 may be exceeded, the fluid flowing through the sampling pipe 19 may be either air or oil (or which is the main).
  • the present invention is not limited to this, and modifications can be made without departing from the spirit and technical idea of the present invention.
  • control device 7A includes one of determination of whether the temperature detected by the temperature sensor 21 may exceed the set value T1 and determination of whether the temperature may be below the set value T2. It may be determined whether the fluid flowing through the sampling pipe 19 is air or oil (or which is the main). Even in such a modification, the same effect as described above can be obtained.
  • the control device 7A determines whether or not the frequency detected by the temperature sensor 21 exceeds the set value T1 more frequently than the predetermined value, and the temperature detected by the temperature sensor 21 sets the set value T2. Even if it determines whether the fluid which flows into sampling piping 19 is one of air and oil (or which is the main) by performing one or both of the judgment of whether the frequency which falls below is more than a predetermined value Good. Even in such a modification, the same effect as described above can be obtained.
  • the control device 7A calculates a rate of change in temperature detected by the temperature sensor 21 (specifically, for example, the rate of change of temperature obtained at each detection time interval of the temperature sensor 21). Sampling piping by performing one or both of determining whether the rate of change may exceed a preset positive set value and determining whether the rate of change may be below a preset negative set value You may determine whether the fluid which flows to 19 is air (or which is main) among air and oil. Even in such a modification, the same effect as described above can be obtained.
  • the configuration of the second embodiment (FIG. 5) can also be applied to the third embodiment. That is, even if the pressure sensor 20 according to the second embodiment is replaced with the temperature sensor 21 according to the third embodiment, the same effect as that of the third embodiment can be obtained.
  • the notification device that notifies the determination result of the control device 7 or 7A is mounted on the compressor unit 9 and is based on the determination result of the control device 7 or 7A.
  • the display device 8 displays information has been described as an example, the present invention is not limited to this, and modifications can be made without departing from the spirit and technical idea of the present invention.
  • the notification device is separated from the compressor unit 9 and is based on information (specifically, based on the determination result of the control device 7 or 7 ⁇ / b> A received via the communication line 22.
  • the communication terminal 23 may display a message such as “alarm: insufficient lubricating oil” or “alarm: replenish lubricating oil”.
  • the communication terminal 23 may be configured to physically contact the compressor unit 9 as long as the communication terminal 23 is configured to be separated as a communication connection configuration.
  • the communication terminal 23 may be placed or suspended in any place of the compressor unit 9 and temporarily fixed so as to be separated.
  • the determination function of the control device 7 or 7A is provided in an external arithmetic device (server or the like) connected via the communication line 22, and the determination result is externally transmitted.
  • the configuration may be such that the communication terminal 23 is notified from the arithmetic device via the communication line 22.
  • the communication terminal 23 may be configured to have the determination function of the control device 7 or 7A.
  • the notification device may be, for example, an alarm lamp or an alarm buzzer mounted on the compressor unit 9.
  • the control apparatus 7 or 7A may drive an alarm lamp or an alarm buzzer, when it determines with the fluid which flows into the sampling piping 19 being air.
  • the sampling pipe 19 (19A) has been described by taking an example in which the outlet side is connected to the upstream side of the oil filter 18 of the oil supply system 6, but the present invention is not limited thereto. Modifications can be made without departing from the spirit and technical idea of the present invention. That is, the sampling pipe is connected to a predetermined height position of the oil separator 4 on the inlet side, and from the predetermined height position of the oil separator 4 by the pressure difference between the inlet side (high pressure side) and the outlet side (low pressure side). What is necessary is just to be comprised so that a fluid may flow. Therefore, the part to which the outlet side of the sampling pipe is connected may be at a pressure lower than the pressure in the oil separator 4 by at least the pressure loss of the sampling pipe.
  • the oil supply type air compressor includes a suction throttle valve 11 that closes the suction side of the compressor body 1 in order to switch the compressor body 1 from the load operation to the no-load operation.
  • a suction throttle valve 11 that closes the suction side of the compressor body 1 in order to switch the compressor body 1 from the load operation to the no-load operation.
  • the oil supply type air compressor replaces the suction throttle valve 11 and discharges the compressor main body 1 (specifically, the adjustment of the compressed air supply system 5).
  • An air release valve 24 (indicated by a dotted line in FIG. 1, FIG. 5, or FIG. 6) for releasing air from the pressure valve 12 may be provided.
  • the control device 7 or 7A controls the air release valve 24 to be in an open state so that the compressor body 1 is not operated from the load operation. Switch to load operation.
  • the discharge valve 24 is controlled to be closed, and the compressor body 1 is switched from the no-load operation to the load operation.
  • the oil supply type air compressor may include both the suction throttle valve 11 and the discharge valve 24.
  • the oil supply type air compressor may be configured not to switch the compressor main body 1 from the load operation to the no load operation. That is, the suction throttle valve 11 or the discharge valve 24 is not provided, and the control device 7 or 7A may not have the above-described operation control function. In these modified examples, the same effect as described above can be obtained.
  • a compressor main body that compresses air (gas) while injecting water (liquid) into a compression chamber
  • a water separator that separates and stores water from compressed air (compressed gas) discharged from the compressor main body
  • the present invention may be applied to a water supply type air compressor including a gas-liquid separator) and a water supply system (liquid supply system) that supplies water stored in the water separator to the compressor body.
  • the present invention is applied to this water supply type air compressor, the water surface height in the water separator can be monitored.
  • the compression mechanism of a so-called twin screw rotor composed of male and female screw rotors has been described as an example, but the present invention is not limited thereto.
  • various compression mechanisms such as a positive displacement type and a turbo type can be applied.
  • the positive displacement type includes a rotary type and a reciprocating type
  • the rotary type includes single, twin and multi screw rotors, single and multi scroll wraps, a vane type and a claw type.
  • the reciprocating type includes single and multiple reciprocating types.
  • the compressor main body is not limited to a single unit configuration, and can be applied to a multi-stage configuration composed of combinations of the same format or different formats.
  • SYMBOLS 1 ... Compressor body, 4 ... Oil separator (gas-liquid separator), 6 ... Oil supply system (liquid supply system), 7, 7A ... Control device, 8 ... Display device (notification device), 9 ... Compressor unit , 11 ... Suction throttle valve, 19, 19A ... Sampling piping, 20 ... Pressure sensor (detector), 21 ... Temperature sensor (detector), 22 ... Communication line, 23 ... Communication terminal (notification device), 24 ... Air release valve

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Compressor (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

L'invention concerne un compresseur de gaz de type à alimentation en liquide permettant de surveiller la hauteur de surface de liquide à l'intérieur d'un séparateur gaz-liquide. Le compresseur de gaz de type à alimentation en liquide comprend : un séparateur d'huile qui sépare et stocke de l'huile à partir d'air comprimé évacué d'un corps principal de compresseur 1 ; un tuyau d'échantillonnage dont le côté entrée est relié à une position de hauteur prescrite du séparateur d'huile et amène le fluide à s'écouler à partir de la hauteur prescrite du séparateur d'huile suite à la différence de pression entre le côté entrée et le côté sortie de celui-ci ; un capteur de pression qui détecte la pression du fluide qui s'écoule ou s'est écoulé dans le tuyau d'échantillonnage ; un dispositif de commande qui détermine si le fluide qui s'écoule à travers le tuyau d'échantillonnage correspond à de l'huile ou du gaz, en déterminant si la pression détectée par le capteur de pression s'élève au-dessus d'une valeur de consigne P1 ou se trouve sous une valeur de consigne P2 ; et un dispositif de notification qui notifie les résultats de détermination du dispositif de commande.
PCT/JP2018/012412 2017-03-29 2018-03-27 Compresseur de gaz du type à alimentation en liquide WO2018181299A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP18777716.4A EP3604808B1 (fr) 2017-03-29 2018-03-27 Compresseur de gaz du type à alimentation en liquide
CN201880019657.9A CN110462213B (zh) 2017-03-29 2018-03-27 供液式气体压缩机
US16/495,866 US20200102950A1 (en) 2017-03-29 2018-03-27 Liquid-Feed-Type Gas Compressor
JP2019509881A JP6742509B2 (ja) 2017-03-29 2018-03-27 給液式気体圧縮機

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JPPCT/JP2017/013105 2017-03-29
PCT/JP2017/013105 WO2018179190A1 (fr) 2017-03-29 2017-03-29 Compresseur de gaz du type à alimentation en liquide

Publications (1)

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WO2018181299A1 true WO2018181299A1 (fr) 2018-10-04

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PCT/JP2018/012412 WO2018181299A1 (fr) 2017-03-29 2018-03-27 Compresseur de gaz du type à alimentation en liquide

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US (1) US20200102950A1 (fr)
EP (1) EP3604808B1 (fr)
JP (1) JP6742509B2 (fr)
CN (1) CN110462213B (fr)
TW (1) TWI671467B (fr)
WO (2) WO2018179190A1 (fr)

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JP7425028B2 (ja) * 2021-09-21 2024-01-30 株式会社日立産機システム 給液式気体圧縮機
BE1030905B1 (nl) * 2022-09-22 2024-04-22 Atlas Copco Airpower Nv Koelinrichting voor het koelen van olie, olie-geïnjecteerde compressorinrichting voorzien van dergelijke koelinrichting en werkwijze voor het regelen van dergelijke koelinrichting

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Also Published As

Publication number Publication date
TW201837311A (zh) 2018-10-16
CN110462213B (zh) 2021-04-13
CN110462213A (zh) 2019-11-15
WO2018179190A1 (fr) 2018-10-04
JP6742509B2 (ja) 2020-08-19
EP3604808B1 (fr) 2021-08-11
US20200102950A1 (en) 2020-04-02
EP3604808A4 (fr) 2020-10-14
EP3604808A1 (fr) 2020-02-05
JPWO2018181299A1 (ja) 2020-01-09
TWI671467B (zh) 2019-09-11

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