WO2019134869A2 - Compresseur à conduite d'aspiration et procédé de commande d'un compresseur - Google Patents

Compresseur à conduite d'aspiration et procédé de commande d'un compresseur Download PDF

Info

Publication number
WO2019134869A2
WO2019134869A2 PCT/EP2018/086819 EP2018086819W WO2019134869A2 WO 2019134869 A2 WO2019134869 A2 WO 2019134869A2 EP 2018086819 W EP2018086819 W EP 2018086819W WO 2019134869 A2 WO2019134869 A2 WO 2019134869A2
Authority
WO
WIPO (PCT)
Prior art keywords
compressor
liquid
valve
suction
suction line
Prior art date
Application number
PCT/EP2018/086819
Other languages
German (de)
English (en)
Other versions
WO2019134869A3 (fr
Inventor
Peter Luckner
Thomas Bittermann
Original Assignee
Kaeser Kompressoren Se
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 Kaeser Kompressoren Se filed Critical Kaeser Kompressoren Se
Publication of WO2019134869A2 publication Critical patent/WO2019134869A2/fr
Publication of WO2019134869A3 publication Critical patent/WO2019134869A3/fr

Links

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
    • 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
    • F04C29/0007—Injection of a fluid in the working chamber for sealing, cooling and lubricating
    • F04C29/0014—Injection of a fluid in the working chamber for sealing, cooling and lubricating with control systems for the injection of the fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/02—Lubrication; Lubricant separation
    • F04C29/028—Means for improving or restricting lubricant flow
    • 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
    • F04C2210/00—Fluid
    • F04C2210/10—Fluid working
    • F04C2210/1005—Air
    • 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
    • F04C2270/86—Detection
    • 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
    • F04C29/026—Lubricant separation

Definitions

  • the invention relates to a compressor, in particular a
  • liquid injected in liquid-injected screw compressors for lubrication is typically oil or water.
  • the oil injected into the compressor block or the compressor stage must be separated from the generated compressed air in order to keep the oil in the oil circuit and to be able to produce compressed air with as little residual oil content as possible.
  • the oil is usually deposited in so-called oil separation tanks in two stages.
  • the first separation stage comprises a mechanical
  • Oil separator container accumulates.
  • one or more so-called oil separation cartridges are used in a fine separation in order to be able to deposit even the finest oil droplets.
  • These cartridges are equipped with a filter consisting of one or more filter media.
  • the filter side facing the first separation stage usually becomes "wet side"
  • the oil droplets contained in the compressed air / oil mixture settle on both sides of the filter as they pass through the filter, and on the wet side of the filter medium, separated oil droplets can form on the surface of the filter accumulate and return to the oil circuit by draining into the oil separator tank on the dry side of the filter medium
  • Compressed air volume flows can be promoted. Also, the cross section can not be reduced arbitrarily, otherwise dirt particles could clog the suction.
  • EP 0 744 550 A2 shows an additional valve in the suction line which can be opened and closed. This arrangement can the
  • Float valve is prone to malfunction, eg. B. due to
  • Compressor block only insufficient.
  • the present invention therefore has for its object to provide a compressor and a method for controlling a compressor for generating compressed air, wherein the return flow of compressed air from a Liquid separator can be reliably prevented in the compressor block. This should in particular improve the efficiency of the compressor.
  • a compressor for generating compressed air, comprising:
  • Compressor block is connected and has a separation tank and a fine separator
  • a suction line for sucking liquid from at least one suction point of the fine separator to a feed point in order to supply the extracted liquid to the compressor block
  • control unit for controlling the valve
  • a media change sensor for detecting a change of media flowing in the suction medium, in particular of extracted liquid to compressed air, which is connected to the control unit.
  • the pressure line, the liquid separator, and the return line in particular form part of a fluid circuit of the compressor, wherein the injected liquid can serve for lubrication and / or cooling of the compressor block.
  • the liquid may be oil or water.
  • the feed point can in the intake of the compressor block, in
  • Compressor housing on a bearing cap, in particular at a position after the suction and before reaching the Verdichtungsend fürs, on a liquid injection line, which in particular forms a portion of the return line, or be provided on a mechanical seal of the compressor block.
  • the feed point is (immediately) upstream or downstream an intake valve of the compressor block is provided.
  • the supply point may be in the range of an atmospheric pressure level (eg in the intake area) or in the area of an intermediate pressure level, ie a pressure level above the intake pressure
  • the extraction point is in particular a collection point for separated liquid in the fine separator and preferably arranged in a, opposite to the direction of gravity, the upper region of the liquid separator.
  • the return line is preferably in a lower region of the
  • Liquid separator connected to the separation tank.
  • Compressor block is in particular to a drive, in particular a motor, connected or coupled to be driven.
  • the compressor block could be designed to compress another gas, in particular nitrogen or helium.
  • the suction line connects the suction point with a feed point for supplying (feeding) the extracted liquid or in the
  • a medium flowing in the suction line can be a named liquid or compressed air or a mixture of liquid and compressed air.
  • An aspirated liquid flowing in the suction line can be formed as a two-phase flow of liquid and compressed air, e.g. B. form of air bubbles mixed with compressed air, be.
  • the suction line can also (temporarily) only be traversed by compressed air.
  • a change of media can also be reversed, i. in particular from the generated compressed air or a liquid-compressed air mixture to the injected liquid.
  • a change of media in the suction takes place when the deposited at the suction liquid (almost) was completely sucked off and due to a pressure gradient between the suction and a feed of the
  • a media change sensor is in particular designed to detect a media change on the basis of a detection of a property of the flowing medium.
  • the media change sensor detects the volume flow (or the mass flow) of the flowing medium, and is in particular designed to distinguish on the basis of the detected volume flow, the flowing in the suction line media.
  • continuously (temporally) changing volume flow indicate a change of media.
  • Volume flow of flowing in the suction medium as a criterion for a media change in particular as a threshold for the detection of a media change, are used.
  • the media change sensor is in particular an electronic sensor and can be based on various physical measuring principles, for example a capacitive, calorimetric, optical or acoustic measuring principle and a detection of a pressure of the medium or of vibrations or oscillations.
  • the media change sensor can be a system of several sensors, each of which can be based on different measurement principles.
  • the output of a media change sensor is preferably a digital signal, but may also be an analog signal.
  • the media change sensor can be used to generate and
  • Transmission of media change data may be formed, for example, may include information about the presence of a certain medium (yes / no) or a volume fraction of a particular medium in the suction and physical parameters of the flowing in the suction medium.
  • the media change sensor may be wired or wireless, in particular via a radio link to be connected to the control unit, wherein an output signal to the control unit of the compressor and / or an external control unit can be transmitted.
  • the media change sensor can in particular be a flow sensor for detecting a changing
  • volume flow of the medium in the suction line be.
  • the control of the valve is preferably carried out based on an output signal of the medium change sensor received by the control unit.
  • the control unit comprises in particular a computing unit, for example a CPU or a microprocessor, and can control commands for an electronic
  • the flow rate of a medium through the suction line can be regulated via the valve.
  • the suction can be fully opened or released by the valve and completely closed or blocked, preferably at least substantially air or liquid-tight.
  • valve is between a release position and a
  • Locking division switchable back and forth whereby intermediate positions of the valve can be provided, which can in particular be continuously adjustable to control the flow through the suction line.
  • the valve according to the invention is in particular not a check valve.
  • a compressor according to the invention has the advantage that the suction line is only released as needed as long as it is possible to actually aspirate liquid. As soon as the media change sensor detects a media change from liquid to compressed air, the suction line can be blocked by the valve. In this way, the efficiency-reducing backflow of compressed air is reliably prevented in the compressor block or at least
  • the suction line can thereby be dimensioned with a larger cross section and a larger pressure gradient, whereby the operating reliability is increased.
  • a known from the prior art check valve in the suction can be omitted because the suction in the operating conditions of the compressor, in which the pressure gradient could reverse over the suction, for example, when switching from load to standstill, or emergency stop, by the Valve can be safely blocked. By eliminating the check valve, the reliability continues to increase. Overall, the reliability is increased and improved efficiency by a compressor according to the invention with a media change sensor and a controllable valve.
  • the media change sensor is arranged at least partially in the suction line and / or designed to detect a change in a physical parameter of the flowing medium in the suction without contact.
  • the medium change sensor can be arranged partially or completely in the suction line in order to be in contact with the medium flowing in the suction line for the purpose of detecting a physical parameter or by a physical parameter of the type described in US Pat Suction line flowing medium to detect contactless.
  • the media change sensor may alternatively be arranged outside the suction line, preferably on or on the suction line, to provide a physical
  • the medium change sensor can be used, for example, as a calorimetric sensor, optical sensor, in particular reflection or turbidity sensor, or as a vibration or vibration sensor in the suction line, i. in contact with the medium, be arranged. Alternatively or additionally, could
  • Media change sensor as a capacitive sensor or an acoustic sensor, in particular ultrasonic sensor or as a microphone, be non-contact measuring, i. without direct contact with the medium.
  • a media change sensor can be based on different measuring principles
  • the media change sensor may be a capacitive sensor.
  • a calorimetric sensor may be adapted to detect a media change.
  • a reflection sensor comprises, in particular, a sensor head with a plastic hemisphere and an infrared sensor and receiver. When wetting the hemisphere with the medium, the refractive index or the
  • Turbidity sensor may be a change in the absorption behavior of the
  • An ultrasound sensor in particular emits an ultrasound signal and evaluates the ultrasound echo.
  • a change in the echo due to a changed transit time or a changed reflection or damping behavior can indicate a change of media.
  • a similar sensor could be based on the TDR (Time Domain Reflectometry) method, especially in the microwave spectrum.
  • TDR Time Domain Reflectometry
  • Media change sensor could be one caused by a media change
  • Detect changes in the flow noise in the suction line In the case of a vibration or vibration sensor could be a, z. B. fork-shaped,
  • a media change sensor may include one or more pressure sensors.
  • the media change sensor is adapted to a proportion of compressed air in the volume flow of the medium in the To detect suction and detects a media change, especially at a detected compressed air content of more than 10%, preferably more than 20%, more preferably more than 30%, more preferably more than 40%, more preferably more than 50%.
  • a medium change sensor can generate an output signal that represents a change of media
  • the medium change sensor is designed as a first pressure sensor for detecting a pressure in the suction line, wherein a nozzle is provided upstream of the pressure sensor in the suction line, the compressor (100) in particular at least one second pressure sensor (42, 43). , preferably upstream of the nozzle (21).
  • the second pressure sensor is for example a sensor for detecting an operating pressure, for. B. within the separation vessel.
  • the first and second pressure sensors are in particular connected to the control unit.
  • Control unit may be configured to determine a change in the pressure difference between the detected by the first and the second pressure sensor pressures. A (temporal), especially erratic, change in the
  • Pressure difference due to a change in the pressure drop across the nozzle may indicate a media change in the suction line.
  • a media change sensor with pressure sensors and a nozzle has the advantage that the implementation is easy and low maintenance, especially if a second pressure sensor in a compressor or a compressor system is already present.
  • the valve gives the
  • the valve is designed in particular as an electrically controllable 2/2-way valve, preferably as a solenoid valve.
  • the valve can also be designed as a proportional valve or as a 3/2-way valve.
  • the valve is designed as a, preferably continuously variable, controllable proportional valve, wherein in particular in an idling operation of the compressor intermediate positions of the proportional valve between a release position and a blocking division by the control unit are adjustable.
  • a proportional valve is advantageous for an idle control of the compressor, in which an idle pressure level by a proportional valve, preferably continuously, is adjustable.
  • an idle control of the compressor can be implemented, in which the idling pressure or the liquid injection volume flow is reduced, in particular until a rise in the compression end temperature is detected by a temperature sensor.
  • control unit is designed to switch the valve from the blocking division into the release position after a predetermined blocking time interval, wherein the blocking time interval is preferably based on the generated compressed air volume flow of the
  • Compressor is determined.
  • a generated compressed air volume flow (delivery quantity) could be determined based on a rotational speed of the compressor or the intake volume flow.
  • an aspirated volume flow could be determined from the run-time under load.
  • the compressor may include a speed sensor for detecting the speed of the compressor and / or a flow sensor for detecting the
  • a blocking time interval may be a stored (stored) fixed or variably determined, for the control unit to be calculated, in particular by the control unit to be calculated value for a period of time.
  • the compressor has at least one pressure sensor for detecting an operating pressure and / or a flow sensor for detecting the liquid volume flow in the
  • control unit is in particular adapted to determine at least on the basis of a detected operating pressure and / or a detected liquid volume flow, a blocking time interval and / or a Absaugzeitintervall.
  • a determination or calculation of a blocking time interval can be based on detected system parameters of the compressor, for example on the operating pressure, the volume flow of the suction line, a delivery quantity of the compressor, a nominal value for a drainage value (so-called "inner drainage").
  • a parameter may be understood to be a value stored in the control unit, a function, a map, or a measured value
  • Compressed air flow rate i.e., a generated delivery rate profile.
  • the oil accumulated at the suction point within this blocking time interval can be reliably sucked off, in particular so as not to exceed a permissible maximum volume of the separated liquid accumulated at the suction point.
  • control unit is adapted to detect a release time interval for the suction line, preferably from a switching time of the valve from the blocking division to the release position, and in particular to compare with a predetermined Absaugzeitintervall to preferably a warning or interference signal generate if the release time interval falls below or exceeds the extraction time interval.
  • a predetermined Absaugzeitintervall in addition to the Absaugzeitintervall a predetermined Absaugzeitintervall
  • the control unit in particular comprises a time detection unit for detecting the release time interval, which can be understood as the actual release duration of the suction line.
  • a suction time interval may be understood as a period of time that would be required for trouble-free operation of the suction line to draw a cumulative amount of liquid.
  • the Absaugzeitintervall can be determined or calculated from previously mentioned operating parameters of the compressor.
  • a warning signal can be generated optically (warning lamp or LED) or acoustically (warning tone) or emitted by the control unit
  • a warning or interference signal is in particular in the case of a blockage of the suction or in a
  • control unit is designed to determine a drainage value, in particular based on the detected release time interval for the suction line and a detected liquid volume flow in the suction line, and to compare with a predetermined drainage threshold, preferably a warning or interference signal to generate when the drainage value of the predetermined
  • Drainage limit falls below or exceeds.
  • Other operating parameters of the compressor may be taken into account when determining the drainage value and / or drainage threshold.
  • a drainage value also known as “inner drainage”
  • Compressed air flow which occurs in the fine separator, in particular on the "dry side” of the fine separator, can be understood, i.
  • the fine separator is disposed in the separation vessel of the liquid separator, wherein the
  • Fine separator preferably has at least one filter for fine separation of liquid from the generated compressed air, wherein the suction point is provided in particular downstream of the filter.
  • the fine separator but also outside of the separator of the
  • Liquid separator can be arranged, for example, as an external Abscheidepatrone.
  • the liquid separator is constructed in two stages, wherein in a first stage, a pre-separation, preferably by gravity, and in the second stage, a fine deposition, preferably by filtering, takes place.
  • a pre-separation preferably by gravity
  • a fine deposition preferably by filtering
  • the suction line is connected to a feed point upstream of an inlet valve of the compressor, in particular of an inlet valve disk.
  • the suction line can be used additionally or alternatively to the suction function for an idle control and / or a bleed control of the compressor.
  • the suction line is connected to a feed point of a liquid-lubricated sealing system, preferably a mechanical seal, of the compressor block, preferably one branching off from the return line to the suction line
  • Seal supply line is connected in particular to the valve, which is preferably designed as a 3/2-way valve, wherein the suction and / or the seal supply line in particular each have at least one nozzle.
  • the valve which is preferably designed as a 3/2-way valve, wherein the suction and / or the seal supply line in particular each have at least one nozzle.
  • a common nozzle for the valve is preferably designed as a 3/2-way valve, wherein the suction and / or the seal supply line in particular each have at least one nozzle.
  • a nozzle may also be in the form of a nozzle bore, in particular in a component of
  • Compressor integrated be provided, the nozzle bore is in particular cross-section determining.
  • the media change sensor may be located downstream or upstream of the valve.
  • the mechanical seal is in particular on the drive side of the compressor block, preferably in one
  • lubricating fluid preferably oil
  • lubricating fluid can account for supply holes in the housing. This allows a very accurate metering and adjustment of the amount of lubrication fluid supplied to the mechanical seal possible. In addition, the amount of liquid supplied can be reduced, which can have a positive effect on the efficiency of the compressor.
  • the object is achieved by a method for controlling a compressor, in particular screw compressor, in particular according to a compressor according to the invention, with a compressor block with
  • Liquid injection a liquid separator connected to the compressor block via a pressure line, having a separation tank and a fine separator, and a return line for returning separated liquid from the separation tank into the compressor block, comprising the following steps: - Aspirate liquid from at least one suction point of the
  • the method comprises a step of releasing the
  • Suction line by driving the valve by the control unit after a predetermined blocking time interval.
  • the blocking time interval can be calculated and stored by a computing unit of the control unit based on detected and / or stored operating parameters of the compressor.
  • a fixed predetermined value can be read out for a blocking time interval.
  • Blocking interval accumulated in the fine separator accumulated liquid according to the first-mentioned step of the inventive method is repeated cyclically, wherein the control unit may provide that for a particular operating condition of the compressor deviated from the method or the method is suspended, in particular in which outputs the control unit independent of the output signal of the media change sensor control commands to the valve in particular during an idle control or a bleed control.
  • the inventive method has similar advantages, as already in
  • connection with the compressor according to the invention have been described.
  • the method can be carried out by the compressor according to the invention.
  • the method may further implement some or all of the process features described in the context of the compressor.
  • the method allows a compressor to operate more reliably and efficiently.
  • Liquid injection one via a pressure line to the compressor block connected liquid separator with a separating vessel and a fine separator, and a return line for returning separated liquid from the separation vessel in the compressor block, comprises an idle control of the compressor, wherein the following step is provided: releasing a suction line between a suction of the Feinabscheiders and a feed point of the compressor block by driving one in the
  • Compressor a predetermined operating condition, in particular a
  • predetermined temperature preferably at least a predetermined proportion of a predetermined liquid injection temperature or a predetermined compression end temperature has reached.
  • the suction line is preferably to a
  • the method further provides for the detection of an operating state, in particular one
  • Operating temperature can z. B. a compression end temperature of the compressed liquid-compressed air mixture or a liquid temperature (oil temperature) of the liquid to be injected (oil), or a percentage, z. B.
  • Idle control has the advantage that a further, in particular lower, idle pressure level can be achieved for idling operation of the compressor. By releasing the suction line during idling operation, a cross-sectional enlargement for promoting the idle flow rate is achieved.
  • the idling pressure of the compressor decreases.
  • a higher idle pressure level in the compressor while in a compressor running at operating temperature (low viscosity the liquid, lower differential pressure in the liquid circuit), by releasing or opening the suction line a lower
  • the flow rate through the suction line can be adjusted by a proportional valve (infinitely variable) according to the operating conditions. Thereby, the efficiency can be further improved for a certain idle operating state of the compressor.
  • Under an idling operation of the compressor may be an operating condition
  • Compressor block continues to drive, but no compressed air is fed into the network. To consume as little energy as possible during idle operation can
  • Venting valve between the liquid separator, preferably its dry side, and the environment (atmosphere) are opened to lower the pressure level to a, the safe operation of the compressor to ensure that the pressure level, which can be referred to as idle pressure level.
  • an idle pressure level is between 1.0 to 1.8 bar (gauge pressure).
  • Compressor block (4) connected to a liquid separator (5)
  • Separation vessel (6) and a fine separator (7), and a return line (53) for returning separated liquid from the separation vessel (6) in the compressor block (4), comprises a vent control of the
  • Compressor (100) wherein the following steps are provided:
  • the suction pipe is preferably at a supply point upstream of an intake valve of the compressor
  • Procedure is a venting of the compressor with two different ones
  • a residual operating pressure can, for example, between 0.5 bar and 10 bar, preferably between 1 bar and 5 bar, more preferably between 1 bar and 3 bar, more preferably about 2.0 bar, compared to
  • Suction line by controlling the valve to suck the liquid in the load run only performed when the compressor is running at full load or runs in a speed range above a predetermined minimum speed.
  • a minimum speed is for example between 70% and 100%, preferably between 80% and 100%, more preferably between 90% and 100% of a maximum speed of the compressor.
  • Fine separator aspirated liquid swirled in the intake and atomized As a result, the intake area and / or the air filter can be wetted. Sucking the liquid only under full load or, in a variable speed compressor, in a sufficiently high speed range, ensures that the sucked air entrains the extracted liquid or a liquid mist in the compressor block, in order to wetting the
  • Target operating pressure and the later detected operating pressure is higher than the previously detected operating pressure.
  • Fine separator is present. A change of the compressor to idle or standstill is by an evaluation of the current operating pressure and the
  • Figure 1 is a schematic representation of an embodiment of a
  • Figure 2 is a schematic representation of an embodiment of a
  • Media change sensor is designed as a pressure sensor
  • Figure 3 is a schematic representation of an embodiment of a
  • inventive compressor with a suction to a Supply point downstream of the inlet valve in a block diagram
  • Figure 4 is a schematic representation of an embodiment of a
  • Compressor according to the invention with a suction to a feed point to a mechanical seal of the compressor block in a block diagram.
  • FIG. 1 shows a first embodiment of a compressor 100, which is designed here as an oil-injected screw compressor, the following description is also applicable to water-injected screw compressor.
  • a drive motor 3 drives z. B. via a drive shaft, a belt drive or a gear which is mounted in a housing of the compressor block 4
  • the compressor block 4 sucks in ambient air through the inlet valve 2 from an air inlet 31 via the air filter 1 and the suction line 51.
  • the hot air is compressed by injection of oil for lubrication and cooling in the compressor block 4.
  • the intake valve includes a check valve, a 2/2-way valve and a throttle connected in parallel.
  • the compressed in the compressor block 4 liquid-compressed air mixture is via the pressure line 52 into the liquid 5
  • oil separator the largest part of the oil is separated by gravity, and possibly by centrifugal forces due to a rotating liquid-compressed air mixture from the air stream in a first separation stage and collects in the lower part of the separation tank 6. From there, the oil through the Pressure in the separation vessel 6 through the return line 53 via a liquid cooler 10 (oil cooler) or a bypass line 55 via a
  • Temperature control valve 8 for controlling the sosstechnikseinspritztemperatur or - inlet temperature ( ⁇ leinspritztemperatur), a liquid filter 9 (oil filter) and a liquid injection line 54, which can be regarded as a portion of the return line 53, fed back to the compressor block 4 and injected there.
  • the network pressure is detected via a pressure sensor 43.
  • the pressure in the separation tank 6 is detected by the pressure sensor 42.
  • Pressure line 52 is provided. From the outlet 58 branch a
  • a silencer 16 is arranged in the vent line 59 b.
  • the liquid separator 5 is formed in two stages.
  • a fine separator 7 is arranged, which has one or more filters, for example in the form of at least one
  • suction line 56 In the suction line 56, a medium change sensor 18, a controllable valve 19 and a muffler 20 are arranged.
  • the suction line 56 opens into the suction line 51 upstream of the inlet valve 2, in particular upstream of an inlet valve disk, at a feed point 34.
  • the suction line 56 opens into the suction line 51 upstream of the inlet valve 2, in particular upstream of an inlet valve disk, at a feed point 34.
  • the valve 19 is designed as a 2/2-way valve, here as an electrically controllable solenoid valve, which regulates the flow rate in the suction line 56 insofar as it in a release position, the suction line 56 (fully) releases or
  • the valve 19 opens and in a blocking division the suction line 56 (completely) blocks or closes.
  • the valve 19 is shown in the blocking division, in which the 2/2-way valve is energized.
  • the valve 19 is controllable or switchable via the control unit 60.
  • the media change sensor 18 may be based on various physical measurement principles and be designed both as a non-contact measuring sensor or be arranged in the suction line 56 in contact with the flowing medium.
  • the medium change sensor 18 is designed as a pressure sensor. Upstream of the pressure sensor 18, a nozzle 21 is provided. Using a second pressure sensor upstream of the nozzle 21, z. B. pressure sensor 42 for detecting the operating pressure, can from the control unit 60th a pressure difference which changes during a change of media is detected via the nozzle 21, which indicates a change of media.
  • the valve 19 is shown in the release position, so that liquid can be sucked through the suction line 56.
  • An operating pressure of the compressor 100 is for example between 3 and 15 bar (overpressure relative to the environment), but may also be higher.
  • the medium change sensor 18 Detects liquid (oil) to compressed air or a liquid-compressed air mixture with a relatively high compressed air content, the medium change sensor 18 generates a corresponding output signal which is transmitted via a connecting line 61 to the control unit 60.
  • the control unit 60 can, based on this output signal, actuate the valve 19 via a connecting line 61 in order to switch it from a release position into a blocking division.
  • the suction medium 56 for the flowing medium is blocked and flow to the compressor block 4 is reliably prevented.
  • the valve 19 is switched from a blocking division back to a release position to allow a suction.
  • Blocking interval may be a fixed predetermined period of time or one based on one or more detected or stored parameters in the
  • Control unit 60 be variably calculated time duration. If one of the
  • Control unit 60 detected release time interval a predetermined
  • a Absaugzeitintervall corresponds to a theoretically required period of time for a suction of the accumulated at the suction point 33 liquid when properly
  • the suction line 56 can be used in the idle of the compressor 100 as an additional line for the promotion (circulation) of compressed air, wherein the line cross-section increases overall and the idle pressure level is thereby lowered.
  • the valve 19 in idle mode in a
  • Suction line 56 is desirable at idle.
  • the valve 19 is designed as a proportional valve
  • the flow rate through the suction line 56 can be controlled steplessly by corresponding intermediate positions of the valve, so that an idling pressure level matched to the operating state of the compressor 100 is adjustable.
  • Idle pressure level is between a low idle pressure level, which adjusts with released suction line 56 and a higher
  • Idle pressure level which is established with a blocked suction line 56.
  • an improvement of the efficiency in the form of a reduced idle power loss can be achieved by a corresponding idling control.
  • the suction line 56 can be used for venting of the compressor 100, with a release of the suction line 56 through the valve 19, a faster venting is achieved. Once a certain residual operating pressure of z. B. 2.0 bar is reached, the suction line 56 can be blocked to reduce the venting speed and to prevent foaming of the oil.
  • FIG. 3 shows an embodiment of a compressor 100 according to the invention, in which the suction line 56 at a feed point 34 downstream of the Inlet valve 2 opens into the compressor block 4. Except for those described in connection with the embodiment of Figure 1
  • Idle control and vent control is the operation of the
  • Compressor 100 is the same. There is no muffler in the suction line
  • FIG. 4 shows an embodiment of a compressor 100 according to the invention, in which the suction line 56 is connected to a feed point 34 of a mechanical seal of the compressor block 4.
  • the return line 53 and the portion of the liquid injection line 54 leads the majority of the
  • Liquid separator 5 recirculated liquid for injection into the
  • Compressor block 4 back, similar to Figures 1, 2 and 3. Of the
  • Return line 53 branches off a seal supply line 57 to the suction line 56, wherein the liquid volume flow in the seal supply line 57, (in particular) by a suitable choice of the line cross-sections or a nozzle, (less) than the liquid volume flow in the
  • Liquid injection line 54 The seal supply line 57 is connected to the controllable valve 19, which is designed as a 3/2-way valve.
  • the suction line 56 comprises a suction section 56a and a
  • the liquid (oil) to be supplied to mechanical seal (not shown) is preferably provided on the drive side of the compressor block in a through hole for the drive or rotor shaft of a screw rotor in the housing of the compressor block supply line 56b for supplying liquid to a mechanical seal of the compressor block ,
  • a nozzle 21 for adjusting the pressure levels and the volume flows in the lines is provided in each case.
  • Liquid from the fine separator 7 passed through the strainer 17 and a nozzle 21 to the mechanical seal until the media change sensor 18 detects a media change in the suction line 56.
  • Seal supply line 57 in particular instead of provided in the housing of the compressor block 4 supply holes, is a very accurate metering and adjustment of the supplied liquid flow to supply the Mechanical seal possible. In addition, the amount of the supplied liquid can be reduced. The efficiency of the compressor 100 can be further improved.
  • liquid filter in particular oil filter
  • Pressure sensor for detecting the network pressure

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

L'invention concerne un compresseur (100), en particulier un compresseur à vis, pour la production d'air comprimé ainsi qu'un procédé de commande d'un tel compresseur (100). Le compresseur (100) comprend un bloc de condenseur (4) à injection de liquide pour la condensation d'air aspiré, un séparateur de liquide (5) qui est connecté au bloc de condenseur (4) par le biais d'une conduite sous pression (52) et qui comporte un récipient de séparation (6) et un séparateur fin (7), une conduite de rétroaction (53) pour la rétroaction de liquide séparé depuis le récipient de séparation (6) dans le bloc de condenseur (4), une conduite d'aspiration (56) pour l'aspiration de liquide d'au moins un point d'aspiration (33) du séparateur fin (7) à un point d'alimentation (34) pour alimenter le bloc condenseur (4) avec le liquide aspiré, une vanne (19) commandable pour le réglage du débit à travers la conduite d'aspiration (56), une unité de commande (60) pour la commande de la vanne (19), et un capteur d'échange de milieux (18) pour la détection d'un échange de milieux d'un milieu s'écoulant dans la conduite d'aspiration (56), en particulier de liquide aspiré en air comprimé, qui est connecté à l'unité de commande (60).
PCT/EP2018/086819 2018-01-08 2018-12-21 Compresseur à conduite d'aspiration et procédé de commande d'un compresseur WO2019134869A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP18150650.2 2018-01-08
EP18150650.2A EP3508729A1 (fr) 2018-01-08 2018-01-08 Compresseur pourvu de conduite d'aspiration et procédé de commande d'un compresseur

Publications (2)

Publication Number Publication Date
WO2019134869A2 true WO2019134869A2 (fr) 2019-07-11
WO2019134869A3 WO2019134869A3 (fr) 2020-01-02

Family

ID=61007455

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/086819 WO2019134869A2 (fr) 2018-01-08 2018-12-21 Compresseur à conduite d'aspiration et procédé de commande d'un compresseur

Country Status (2)

Country Link
EP (1) EP3508729A1 (fr)
WO (1) WO2019134869A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019003484A1 (de) * 2019-05-17 2020-11-19 Baumer Electric Ag Vorrichtung zum Erfassen eines Medienwechsels in einer Leitung
CN112576490A (zh) * 2020-11-27 2021-03-30 苏州寿力气体设备有限公司 一种移动式空压机的控制方法和装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1028138B1 (nl) * 2020-03-10 2021-10-11 Atlas Copco Airpower Nv Smeermiddelrecuperatiesysteem en vacuümsysteem omvattende dergelijke smeermiddelrecuperatiesysteem

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4070166A (en) 1975-01-24 1978-01-24 Atlas Copco Aktiebolag Method and device for driving liquid from a liquid separator
EP0744550A2 (fr) 1995-05-25 1996-11-27 Compair Broomwade Ltd. Recirculation d'huile dans des compresseurs à vis
US20150343365A1 (en) 2014-05-28 2015-12-03 Ingersoll-Rand Company Compressor system and oil separation system

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2701684A (en) * 1953-10-23 1955-02-08 Worthington Corp Oil circulating system for rotary fluid compressors
US6116046A (en) * 1999-03-05 2000-09-12 American Standard Inc. Refrigeration chiller with assured start-up lubricant supply
ES2346321T3 (es) * 2004-12-13 2010-10-14 Ingersoll-Rand Company Sistema de lubricacion de compresor que incluye filtracion de acido.
EP1963679A1 (fr) * 2005-12-23 2008-09-03 Gardner Denver, Inc. Compresseur a vis avec systeme d'injection d'huile
CN103306981A (zh) * 2012-03-12 2013-09-18 上海斯可络压缩机有限公司 双螺杆空压机
JP2013217283A (ja) * 2012-04-09 2013-10-24 Kobe Steel Ltd ２段油冷式圧縮装置
RU2716948C1 (ru) * 2016-04-06 2020-03-17 Битцер Кюльмашиненбау Гмбх Компрессорный модуль холодильного агента

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4070166A (en) 1975-01-24 1978-01-24 Atlas Copco Aktiebolag Method and device for driving liquid from a liquid separator
EP0744550A2 (fr) 1995-05-25 1996-11-27 Compair Broomwade Ltd. Recirculation d'huile dans des compresseurs à vis
US20150343365A1 (en) 2014-05-28 2015-12-03 Ingersoll-Rand Company Compressor system and oil separation system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019003484A1 (de) * 2019-05-17 2020-11-19 Baumer Electric Ag Vorrichtung zum Erfassen eines Medienwechsels in einer Leitung
CN112576490A (zh) * 2020-11-27 2021-03-30 苏州寿力气体设备有限公司 一种移动式空压机的控制方法和装置
CN112576490B (zh) * 2020-11-27 2023-02-17 苏州寿力气体设备有限公司 一种移动式空压机的控制方法和装置

Also Published As

Publication number Publication date
WO2019134869A3 (fr) 2020-01-02
EP3508729A1 (fr) 2019-07-10

Similar Documents

Publication Publication Date Title
WO2019134869A2 (fr) Compresseur à conduite d'aspiration et procédé de commande d'un compresseur
DE10342081B4 (de) Kraftstoffbehälter für ein Kraftfahrzeug
EP2977647B1 (fr) Boîte de vitesses d'un véhicule automobile
EP1961963B1 (fr) Commande de pompes en fonction du niveau
DE4006216A1 (de) Vorrichtung zum ableiten von sich im behaelter eines wasserabscheiders einer brennkraftmaschine ansammelnden wassers
EP2815089A1 (fr) Dispositif de dégazage de carter de vilebrequin
DE60012032T2 (de) Kühlvorrichtung mit flüssigkeit-gas-trennschleuder
EP1268075B1 (fr) Centrifugeuse a jet libre avec moyens de surveillance, et procede de surveillance de cette centrifugeuse
DE102010016212B4 (de) Kraftstoffversorgungsvorrichtung
DE102009048271A1 (de) Vorrichtung zur Partikelmessung in stark mit Gas, insbesondere Luft beladenem Medium
EP2229532B1 (fr) Compresseur à piston
DE102011109864B4 (de) Schmiersystem zum Zuführen von Drucköl zu einem Motor
DE102016005270B4 (de) Ablasssteuerungsvorrichtung für ein Filtersystem sowie Filtersystem mit einer Ablasssteuerungsvorrichtung
DE202018006087U1 (de) Anordnung für die Sammlung und Entleerung von Enteisungs- und Kondensationswasser aus Kälte- und Kühlaggregaten
EP2423496B1 (fr) Séparateur cyclonique doté d'un axe de cyclone horizontal
WO2010149642A1 (fr) Système de filtration pour liquides d’un circuit hydraulique
EP4194668A1 (fr) Système de transport de fluide avec inversion de vitesse en fonction de la charge d'une pompe rotative
DE102005038896B4 (de) Flüssigkeitsabschneider und dessen Verwendung
DE102006055760A1 (de) Schmiermitteltank mit einem Gasabscheider
DE102009028831A1 (de) Unterdruckpumpe mit Druckausgleich
DE202016104755U1 (de) Ölabscheider, Entlüftungssystem und Verbrennungsmotor
DE2256137A1 (de) Gasabscheider
EP3361126B1 (fr) Dispositif d'alimentation en fluide pour une chaîne cinématique d'un véhicule automobile ainsi que dispositif d'entraînement/d'accouplement
JP4080287B2 (ja) 油清浄装置
DE19621167A1 (de) Luftabscheider für einen Milchsammelwagen

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18829883

Country of ref document: EP

Kind code of ref document: A2

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18829883

Country of ref document: EP

Kind code of ref document: A2