EP4015823A1 - Unité de moteur à piston rotatif pourvu de dispositif d'alimentation en lubrifiant - Google Patents

Unité de moteur à piston rotatif pourvu de dispositif d'alimentation en lubrifiant Download PDF

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Publication number
EP4015823A1
EP4015823A1 EP20214588.4A EP20214588A EP4015823A1 EP 4015823 A1 EP4015823 A1 EP 4015823A1 EP 20214588 A EP20214588 A EP 20214588A EP 4015823 A1 EP4015823 A1 EP 4015823A1
Authority
EP
European Patent Office
Prior art keywords
lubricant
rotary piston
pump
engine unit
piston machine
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
EP20214588.4A
Other languages
German (de)
English (en)
Inventor
Hans-Ulrich Fleige
Thore Evers
Pascal Luhmann
Frank Willmann
Patrick Stenzel
André Holland-Letz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aerzener Maschinenfabrik GmbH
Original Assignee
Aerzener Maschinenfabrik GmbH
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 Aerzener Maschinenfabrik GmbH filed Critical Aerzener Maschinenfabrik GmbH
Priority to EP20214588.4A priority Critical patent/EP4015823A1/fr
Publication of EP4015823A1 publication Critical patent/EP4015823A1/fr
Pending legal-status Critical Current

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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
    • F04C29/02—Lubrication; Lubricant separation
    • F04C29/025—Lubrication; Lubricant separation using a lubricant pump
    • 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
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F04B17/04—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/20—Filtering
    • 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
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/005—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids of dissimilar working principle
    • 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
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • 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
    • F04C2240/40—Electric motor
    • F04C2240/401—Linear motor
    • 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
    • F04C2240/40—Electric motor
    • F04C2240/403—Electric motor with inverter for speed control
    • 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
    • F04C2240/808—Electronic circuits (e.g. inverters) installed inside the machine
    • 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
    • F04C2270/10—Voltage

Definitions

  • the invention relates to a rotary piston machine unit with a dry-running, two-shaft rotary piston machine and a lubricant supply device.
  • Rotary piston machines in particular screw compressors and positive displacement blowers of the Roots type, but also rotary piston expansion machines, are usually primarily fitted with roller bearings up to differential pressures of around 15 bar and speeds of up to around 20,000 rpm.
  • the high radial forces that occur as a result of the compression or expansion process are absorbed by cylindrical roller bearings, for example.
  • a pressure gradient also develops in the axial direction, which also causes axial forces to occur in the bearings. Additional axial forces can also be caused, for example, by helical gears mounted on the rotor shafts.
  • These highly stressed bearings must be adequately supplied with lubricating oil.
  • the bearings and the synchronizing wheels of such rotary piston machines are typically supplied with oil in one of three ways mentioned below.
  • oil pumps are used, which are often mechanically driven directly by one of the two shafts of the twin-shaft rotary engine.
  • the size of the oil pump must be dimensioned in such a way that even at all operating points of the rotary piston machine with the lowest permissible speed sufficient oil is pumped. This often means that at higher speeds, much more oil is pumped than is required.
  • the use of an oil pump has advantages in that larger quantities of oil can be sprayed through nozzles into the bearings or at other lubrication points. With large amounts of oil at high speeds, however, this causes large flow losses, which is why so-called overflow regulators are often used to limit the outlet pressure of the oil pump. Even if the power consumption of the pump is limited by the overflow controller, it requires an unnecessarily large amount of power at high speeds, which significantly worsens the overall efficiency of the rotary piston machine or the rotary piston machine unit.
  • One aim of the invention is to provide a rotary piston machine assembly with a lubricant supply device, the lubricant supply device itself consuming as little power as possible, which on the one hand increases the overall efficiency of the rotary piston machine assembly improved and on the other hand the average lubricant temperature should be reduced. Furthermore, the operational safety should be increased and the service life of the lubricant and the bearings should be increased.
  • a rotary piston machine unit with the features according to claim 1 is provided. Preferred embodiments are set out in the dependent claims. Furthermore, the invention relates to the use of a lubricant supply device for a rotary piston machine.
  • a rotary piston engine unit includes, in addition to other components, such as a main drive motor or a lubricant supply device, as a mechanical unit, a rotary engine.
  • a main drive motor or a lubricant supply device as a mechanical unit, a rotary engine.
  • a rotary engine In so-called "dry-running" rotary piston machines, the profiled areas of the rotors have no contact with one another due to the synchronization of the rotors by a synchronization gear arranged outside the pumping chamber.
  • the rotors of the rotary piston machine are thus arranged for non-contact running.
  • the design as a dry-running rotary piston machine does not rule out the possibility of liquid media being injected, e.g. to achieve cooling during operation.
  • Such a rotary piston machine usually comprises two rotors which are mounted in a housing via shafts and bearing arrangements and which mesh with one another in opposite directions in order to define a pumping chamber together with the housing.
  • One of the bearing arrangements of each shaft is designed as a fixed bearing arrangement in the axial direction.
  • the task of the synchronizing gears is to allow the pair of rotors to rotate in opposite directions with as little play as possible but without contact.
  • the synchronous wheels transmit a significant torque.
  • the bearings and/or synchromesh must be supplied with lubricant.
  • the lubricated spaces, in which the bearing arrangements and the synchronizing wheels are located, are separated from the pumping space by means of shaft seals, some of which are quite complex, so that the pumped medium does not come into contact with oil.
  • the rotary piston machine unit comprises a dry-running, two-shaft rotary piston machine and a lubricant supply device, the lubricant supply device comprising an electrically driven lubricant pump.
  • the lubricant pump can be operated with a control voltage of the rotary piston machine unit, the control voltage being ⁇ 50 V.
  • a third voltage supply level can be avoided in this way, particularly in the case of rotary piston engines with lower power, so that it is possible to use only the voltage levels that are already present in the rotary engine unit for the main drive motor and for the control voltage.
  • the lubricant pump is preferably an oil pump.
  • a mineral lubricating oil or else a synthetic lubricating oil can be used as a lubricant, for example.
  • the rotary piston machine assembly has a control voltage power pack, which provides an electrical supply to a control device of the rotary piston machine assembly, and in particular to the lubricant pump.
  • the lubricant pump of the lubricant supply device has the advantage that a continuous supply of lubricant is ensured is, the complexity of the structure of the rotary piston machine unit is not increased by the operation by means of the control voltage of the rotary piston machine.
  • control voltage is DC. This means that the control voltage that is usual for rotary piston machine units can be used.
  • the electric lubricant pump driven by the control voltage is a displacement pump.
  • the lubricant can also be pumped at higher pressures.
  • a preferred embodiment of a positive displacement lubricant pump is the gear pump.
  • the lubricant pump is an oscillating armature pump with an upstream pulse width modulator (PWM).
  • PWM pulse width modulator
  • Oscillating piston pumps are also referred to as oscillating piston pumps or solenoid pumps or oscillating piston pumps.
  • the working principle of such pumps is based on a piston which is attracted by a magnetic field against the force of a spring and thus performs a lifting movement. To When the magnetic field is switched off, the piston is moved back in the other direction by the spring force.
  • Oscillating armature pumps are, for example, in AT 275329B , EP 0 288 216 B1 or EP 1 818 538 B1 disclosed.
  • the generation of a periodically present and non-existent magnetic field is usually realized by means of a coil through which current periodically flows.
  • DC direct current
  • PWM pulse width modulators
  • the lubricant pump is set up to be operated with a control voltage of ⁇ 30 V (in particular DC), e.g. 24 V (in particular DC).
  • a pulse width modulator PWM
  • DC direct current
  • the rotary engine unit has a lubricant cooler to cool the lubricant.
  • the lubricant cooler is arranged in particular on an outlet side of the lubricant pump. This has the advantage that the lubricant, which is still heated, is pumped through the lubricant pump, thus enabling a higher volume flow.
  • the rotary piston machine unit has a lubricant filter with which the circulating lubricant can be cleaned. It is particularly preferred to provide the lubricant filter on an inlet side of the lubricant pump. Thus, the pump protected. In addition, the lubricant on the inlet side has a lower viscosity due to the heated condition, so that the flow of the lubricant through the lubricant filter is less affected.
  • the lubricant cooler and/or the lubricant filter also contribute to ensuring that the lubricant has a relatively long service life. A permanent and reliable supply of lubricant can thus be provided.
  • the use of a lubricant cooler and/or lubricant filter is not possible when using splash disks, splash rings or the like.
  • the rotary piston machine unit preferably has an inlet line for conveying a lubricant from the lubricant pump to the bearings and a synchronization gear of the rotary piston machine and a return line for conveying a lubricant from the bearings and a synchronization gear of the rotary piston machine to the lubricant pump.
  • the rotary piston machine is a screw compressor.
  • the invention also relates to the use of a lubricant pump for supplying lubricant to a dry-running rotary piston machine, the lubricant pump being operated with a control voltage of the rotary piston machine, the control voltage being ⁇ 50 V.
  • a lubricant pump for supplying lubricant to a dry-running rotary piston machine, the lubricant pump being operated with a control voltage of the rotary piston machine, the control voltage being ⁇ 50 V.
  • a lubricant supply device 10 is integrated in a screw compressor unit 1 (as an example of a rotary engine unit).
  • the screw compressor unit 1 comprises a screw compressor 100 (as an example of a rotary machine) and a main drive motor 101 used to drive the rotors of the screw compressor 100 .
  • the main drive motor 101 is supplied with a three-phase operating voltage of 400 V AC.
  • the rotors of the screw compressor 100 are arranged to run without contact and are synchronized by means of a synchromesh gear.
  • the bearings and the synchronization gear are supplied with lubricant, in particular lubricating oil.
  • lubricant supply device 10 according to the embodiment is used for this.
  • the lubricant supply device 10 comprises an inflow line 11, which conducts a flow of lubricant to the screw compressor 100, and a return line 12, which is connected to the screw compressor 100 on a return side. Between the return line 12 and the feed line 11, the lubricant pump 14 is arranged, which is designed according to the embodiment as an oscillating armature pump.
  • the lubricant pump 14 is preceded by a lubricant filter 13 which cleans the lubricant supplied from the return line 12 .
  • a lubricant filter 13 which cleans the lubricant supplied from the return line 12 .
  • the lubricant flows through a first connecting line 16 to the lubricant pump 14, which further conveys the lubricant.
  • a supply line 18 is provided in the area of the first connecting line 16 in order to supply lubricant to the lubricant circuit or to remove it from the lubricant circuit.
  • the lubricant delivered by the lubricant pump 14 is supplied to a lubricant cooler 15 via a second connecting line 17 in order to cool the lubricant after it has left the lubricant pump 14 .
  • An outlet of the lubricant cooler 15 communicates with the supply line 11 through which the lubricant is supplied to the screw compressor 100 .
  • the lubricant is distributed within the screw compressor on both bearing sides of the rotors.
  • a coupling line 19 is provided on the screw compressor 100 in order to supply the returning lubricant from a bearing side (in 1 the drive side) to another bearing side of the screw compressor 100 to lead.
  • the other side of the bearing of the screw compressor 100 is with the Return line 12 in connection to close the lubricant circuit.
  • the lubricant pump 14 is operated with a control voltage for the screw compressor unit 1 of 24 V DC.
  • a pulse width modulator (PWM) 21 is provided for this purpose, which is preceded by a power pack 20.
  • the power pack 20 is usually supplied with an operating voltage of 400 V AC and converts the operating voltage of 400 V AC into direct voltage (typically 24 V DC).
  • the power pack 20 provides, among other things, an electrical supply to a control device 22 of the rotary piston engine unit 1 and in particular to the lubricant pump 14 .
  • the pulse width modulator 21 receives the direct current (DC) provided by the power pack 20 and converts it into square-wave pulses.
  • a coil of the lubricant pump 14 is periodically excited by means of the pulses, the magnetic field of which acts on an oscillatingly mounted armature.
  • the lubricant pump thus operates at the frequency of the voltage supplied by the pulse width modulator 21 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
EP20214588.4A 2020-12-16 2020-12-16 Unité de moteur à piston rotatif pourvu de dispositif d'alimentation en lubrifiant Pending EP4015823A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20214588.4A EP4015823A1 (fr) 2020-12-16 2020-12-16 Unité de moteur à piston rotatif pourvu de dispositif d'alimentation en lubrifiant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20214588.4A EP4015823A1 (fr) 2020-12-16 2020-12-16 Unité de moteur à piston rotatif pourvu de dispositif d'alimentation en lubrifiant

Publications (1)

Publication Number Publication Date
EP4015823A1 true EP4015823A1 (fr) 2022-06-22

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP20214588.4A Pending EP4015823A1 (fr) 2020-12-16 2020-12-16 Unité de moteur à piston rotatif pourvu de dispositif d'alimentation en lubrifiant

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Country Link
EP (1) EP4015823A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115681474A (zh) * 2022-11-29 2023-02-03 泉州博易盛科技有限公司 一种润滑油可循环利用的涡轮蜗杆减速器

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT275329B (de) 1967-02-21 1969-10-27 Glutz Blotzheim Nachfolger A G Elektromagnetische Schwingankerpumpe
GB2198191A (en) * 1986-10-14 1988-06-08 Orbital Eng Pty Solenoid driven pump
EP0288216B1 (fr) 1987-04-15 1992-04-15 Eaton S.A.M. Pompe électrique à liquides
EP1855009B1 (fr) 2006-05-11 2008-12-03 Aerzener Maschinenfabrik GmbH Machine rotative à lobes
EP1818538B1 (fr) 2006-02-10 2009-04-22 Defond Components Limited Pompe à fluides
WO2015191348A1 (fr) * 2014-06-09 2015-12-17 Synerject Llc Procédés et appareil de refroidissement d'une bobine de solénoïde d'une pompe à solénoïde
EP3263903A1 (fr) * 2015-02-25 2018-01-03 Hitachi Industrial Equipment Systems Co., Ltd. Compresseur sans huile
DE102019201367A1 (de) * 2019-02-04 2020-08-06 Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Würzburg Antrieb eines Nebenaggregats

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT275329B (de) 1967-02-21 1969-10-27 Glutz Blotzheim Nachfolger A G Elektromagnetische Schwingankerpumpe
GB2198191A (en) * 1986-10-14 1988-06-08 Orbital Eng Pty Solenoid driven pump
EP0288216B1 (fr) 1987-04-15 1992-04-15 Eaton S.A.M. Pompe électrique à liquides
EP1818538B1 (fr) 2006-02-10 2009-04-22 Defond Components Limited Pompe à fluides
EP1855009B1 (fr) 2006-05-11 2008-12-03 Aerzener Maschinenfabrik GmbH Machine rotative à lobes
WO2015191348A1 (fr) * 2014-06-09 2015-12-17 Synerject Llc Procédés et appareil de refroidissement d'une bobine de solénoïde d'une pompe à solénoïde
EP3263903A1 (fr) * 2015-02-25 2018-01-03 Hitachi Industrial Equipment Systems Co., Ltd. Compresseur sans huile
DE102019201367A1 (de) * 2019-02-04 2020-08-06 Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Würzburg Antrieb eines Nebenaggregats

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115681474A (zh) * 2022-11-29 2023-02-03 泉州博易盛科技有限公司 一种润滑油可循环利用的涡轮蜗杆减速器

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