EP3322899A1 - Compresseur et procédé de commande de sa vitesse de rotation - Google Patents
Compresseur et procédé de commande de sa vitesse de rotationInfo
- Publication number
- EP3322899A1 EP3322899A1 EP16745062.6A EP16745062A EP3322899A1 EP 3322899 A1 EP3322899 A1 EP 3322899A1 EP 16745062 A EP16745062 A EP 16745062A EP 3322899 A1 EP3322899 A1 EP 3322899A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- compressor
- speed
- time
- average
- rotational speed
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 36
- 230000006835 compression Effects 0.000 claims abstract description 14
- 238000007906 compression Methods 0.000 claims abstract description 14
- 238000012544 monitoring process Methods 0.000 claims description 19
- 239000012530 fluid Substances 0.000 claims description 17
- 238000000926 separation method Methods 0.000 claims description 6
- 239000002826 coolant Substances 0.000 claims description 3
- 239000000314 lubricant Substances 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 6
- 239000002245 particle Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 230000002123 temporal effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 206010012289 Dementia Diseases 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/08—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by varying the rotational speed
-
- 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
- F04C29/026—Lubricant separation
Definitions
- the present invention initially relates to a method for controlling the speed of a compressor, by which in particular the rotational speed of a rotating compression element of the compressor is controlled. Furthermore, the invention relates to a compressor; For example, a compressor for generating compressed air.
- DE 603 13 320 T2 shows a method for relieving a screw compressor, in which air is removed from the screw ⁇ compressor at a closed air inlet.
- the DE 10 2013 111 218 Al teaches an electronic control ⁇ device for a component for generating compressed air.
- the controller relies on models for the structure and behavior of the compressed air component.
- DE 601 18 088 T2 shows a method for controlling a compressor system, in which the rotational speed of a lubricated compressor element is controlled.
- the DE 601 15 671 T2 teaches an oil-injected screw-type compressor with a variable rotational speed, which is controlled from ⁇ continuously from a measurement of the speed and torque of the rotary ⁇ a compressor drive means.
- the object of the present invention starting from the prior art is to permanently ensure the function of a compressor whose output power is variable by varying its speed while allowing efficient operation of the compressor.
- the inventive method is used for speed control of a compressor.
- the compressor is in particular ⁇ special to a compressor, which preferably serves to generate compressed air.
- the operation of the compressor is characterized by a rotational speed, which is in particular the rotational speed of a rotatable compression element of the compressor.
- the compressor should be operated during its operation at a speed which has an average value which is at least as large as a minimum mean value.
- the speed is variable over time.
- the mean value is an average value of the time-varying speed.
- the permanent function of the compressor is guaranteed only if its speed in the longer term average is at least as large as the minimum mean value. This results from the fact that individual operations in the compressor, such as in particular an oil separation or lubrication, only to a sufficient extent, if the speed of the compressor in the longer term
- Average is at least as large as the minimum mean.
- a setpoint speed of the compressor is determined which is suitable for one of
- Compressor to be achieved output power is necessary.
- the output power to be achieved by the compressor is determined in particular by another process or by an operator of the
- Compressor determines and is temporally changeable. Dement ⁇ speaking, the target speed is temporally variable.
- a time average of the time-variable setpoint speed is determined.
- the time average is the average target speed in the considered time period.
- Compressor raised if the time average of the variable ⁇ target speed is less than the minimum mean value of the speed of the compressor.
- the lower speed limit is a value that is not to be undershot by the speed of the compressor.
- Compressor would be, so the function of the compressor would no longer be ensured because, for example, an oil separation would no longer be sufficient, whereby the oil content of a generated compressed air would be too large.
- Increasing the lower speed limit causes the average speed of the compressor to increase causing the function of the compressor to increase
- a particular advantage of the method according to the invention is that the compressor can be operated efficiently, since it can work at times even at low speeds, which are below a corresponding static lower speed limit, if a correspondingly low power ⁇ requirement exists.
- the time average of the time-variable setpoint speed over a temporal monitoring interval is determined.
- the time average of the setpoint speed thus represents the average setpoint speed in the monitoring interval.
- the lower speed limit is raised upon expiry of the ⁇ wachungsintervalls if the time average of the variable target rotational speed is smaller than the minimum average of the speed of the compressor.
- the lower speed limit immediately after the expiry of the
- Average value of the speed of the compressor is. This ensures that the average speed of the compressor increases in the short term.
- the time profile of the time-variable setpoint speed of the compressor is recorded during the monitoring interval. It is therefore not only the means ⁇ worth before the desired speed, but also the timing of the set speed.
- the lower speed limit is raised to the end of the monitoring interval so far that the on ⁇ drawn time course of the time-varying setpoint speed at a restriction by the raised lower speed limit has a time average over the over ⁇ monitoring interval away, which is at least as large and more preferably the same large as the minimum mean ⁇ value of the speed of the compressor is.
- the compressor in the following
- Monitoring interval is operated with a same course of the output power to be achieved. If this is indeed the case, the average value of the speed of the compressor in this next monitoring interval will be at least as great or the same as the minimum average value of the speed. Consequently, on the one hand the function of the compressor is ensured and on the other hand, the speed of the
- the method according to the invention preferably runs periodically, the periods corresponding in each case to the monitoring duration. In each of the periods, a determination is made of the time-variable setpoint speed of the compressor, a determination of the time average of the time-variable setpoint speed, and a raising of the lower speed limit, if the time The variable speed reference means is less than the minimum average speed of the compressor.
- the method further comprises monitoring is carried out as often changes the time ⁇ Lich variable target rotational speed between an upper target speed and a lower nominal speed.
- the upper target speed is preferably formed by the maximum speed of the compressor and corresponds to a full load operation.
- the upper target speed is alternatively preferably 80% of the maximum speed of the compressor.
- the lower setpoint speed is preferably formed by an idling speed.
- the lower target speed is alternatively preferably 50% of the maximum speed of the compressor.
- further lowering of an upper speed limit occurs if the change between the lower target speed and the upper target speed exceeds a predefined maximum number.
- the lowered upper speed limit is smaller than the upper setpoint speed.
- the compressor is operated at the target speed, however, the upper speed limit is not exceeded ⁇ .
- the lowering of the upper speed limit causes the compressor less often between a very high speed, namely in particular the maximum speed, and a low speed, namely in particular the idle speed changes. Insofar as the output to be achieved ⁇ performance of the compressor often changes between high performance and low power, this also leads to a frequent change between the upper setpoint speed and the lower setpoint speed.
- the speed of the compressor will follow these changes but not to the same extent, but vary in a middle range. This will reduce the wear of the
- the predefined maximum number of bills of exchange is sized to make the compressor efficient
- the described monitoring of how often the time-variable setpoint speed changes between the upper setpoint speed and the lower setpoint speed preferably takes place over the monitoring interval.
- the compressor is preferably designed for compressing a medium, so that according to the invention a compression of the medium takes place.
- the medium is preferably formed by a gas.
- the gas is preferably formed by air, so that the compressor is designed to generate compressed air from the
- Compressor is output.
- the gas may, however, also be, for example, carbon dioxide or oxygen.
- the medium to be compressed may also be, for example, an aerosol.
- the compression of the medium takes place within the compressor preferably with intermeshing screw rotors, which form the compression elements.
- the above-described rotation ⁇ number of the compressor represents the speed of the screw rotor.
- the compressor can also with different types Compression elements, such as gears or pistons may be formed.
- the compressor is preferably operated with a fluid as a lubricant and / or with a fluid as a coolant.
- Fluid is preferably formed by oil and / or water.
- a separation of the compressed gas from the fluid for which a separator is used.
- the inventive raising the lower speed limit, if the time average of the variable target speed is less than the minimum average value of the speed of the compressor, is preferably to ensure the separation of the compressed gas from the fluid using the separator permanently, ie to the function of the separator permanently to ensure ⁇ afford.
- the time-varying output power to be achieved is preferably represented by a volume flow of the medium compressed by the compressor.
- the speed of the compressor and the volume flow are directly dependent on each other.
- the achievable, time-varying output power can also be represented by a pressure.
- the compressor according to the invention serves to compress a
- Medium It comprises at least one rotatable compression ⁇ element and a motor for driving the at least one rotatable compression element.
- the compressor is to operate during its operation at a speed which has an average value at least as large as a minimum
- the compressor further comprises a speed control, which is used to carry out the method according to the invention is configured.
- the speed control is preferably configured for off ⁇ guide preferred embodiments of the inventive method.
- the compressor according to the invention preferably also has such features that in
- the compressor is preferably formed by a screw compressor, for which purpose it comprises at least two of the rotatable compression elements, which by interlocking
- Screw rotors are formed.
- the compressor is preferably designed with a fluid as lubricant and / or a fluid as coolant
- the fluid is preferably oil and / or
- the compressor preferably comprises a separator for separating the fluid from the compressed gas.
- the separator is preferably formed by a pre-separator and / or by a fine separator.
- the control is preferably formed by a microcontroller, which converts the individual control steps and generates the control signal.
- a preferred embodiment of the invention is formed by an oil-injected screw compressor for compressing air.
- the compressed air is emitted as compressed air.
- the screw compressor comprises a compressor stage, into which oil is injected for lubrication and cooling, and after the compression of the air on a pressure side of the
- Screw compressor is separated from the compressed air.
- the screw compressor for this purpose includes a pre-separator, with which the compressed air is separated from the oil, wherein the
- residual fluid content small proportion of oil particles, which is referred to as residual fluid content.
- the residual fluid content is about 1 to 5 mg
- the fine separator only works in a limited way
- volume flow window to a sufficient extent. If this volume flow window is left, this manifests itself after a short time
- the volume flow of the screw compressor is at a minimum speed of the screw compressor below the minimum volume flow of the fine separator.
- the amount of compressed air supplied by the screw compressor can be selected and changed by the operator.
- compressed air delivery quantity repre sented ⁇ a maximum output power, which is variable with time.
- the speed of the screw compressor and the compressed air ⁇ delivery quantity, ie the flow rate of the compressor are directly dependent on each other. Depends on the time course of the air output is automatically affect the speed limits, that is taken according to the invention based on this Frequency ⁇ distribution to a lower speed limit and an upper speed limit. The speed of the screw compressor is subsequently between the lower and the upper speed limit.
- the number of changes from a load to an idle is determined according to the invention. If this number exceeds a predefined maximum number, the upper speed limit is lowered, so that the maximum volume flow decreases, with the result that the screw compressor changes less frequently from load to idling. A frequent change between load and idle would lead to a reduction in energy efficiency due to pressure relief ⁇ processes, which is prevented according to the invention. This is particularly relevant for such compressors in which the volume flow to be achieved is much lower than that
- the speed control system generates new consumption profiles at regular intervals in order to re-adjust the speed limits when the compressed air demand changes.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015111287.6A DE102015111287B4 (de) | 2015-07-13 | 2015-07-13 | Kompressor und Verfahren zu dessen Drehzahlsteuerung |
PCT/EP2016/066469 WO2017009307A1 (fr) | 2015-07-13 | 2016-07-12 | Compresseur et procédé de commande de sa vitesse de rotation |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3322899A1 true EP3322899A1 (fr) | 2018-05-23 |
EP3322899B1 EP3322899B1 (fr) | 2019-05-08 |
Family
ID=56555360
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16745062.6A Active EP3322899B1 (fr) | 2015-07-13 | 2016-07-12 | Compresseur et procédé de commande de la vitesse angulaire |
Country Status (7)
Country | Link |
---|---|
US (1) | US10815996B2 (fr) |
EP (1) | EP3322899B1 (fr) |
CN (1) | CN107923401B (fr) |
BR (1) | BR112018000483B1 (fr) |
CA (1) | CA2991806A1 (fr) |
DE (1) | DE102015111287B4 (fr) |
WO (1) | WO2017009307A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112865659B (zh) * | 2019-11-12 | 2022-04-19 | 杭州先途电子有限公司 | 一种转矩补偿控制方法、系统及控制器 |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USRE30994E (en) * | 1978-03-02 | 1982-07-13 | Dunham-Bush, Inc. | Vertical axis hermetic rotary helical screw compressor with improved rotary bearings and oil management |
JPH0742939B2 (ja) * | 1985-10-07 | 1995-05-15 | 株式会社日立製作所 | トルク制御式圧縮機 |
KR910009242B1 (ko) * | 1987-08-04 | 1991-11-07 | 가부시기가이샤 히다찌세이사꾸쇼 | 회전 전동기의 토오크 제어장치 |
US6216474B1 (en) | 1999-09-27 | 2001-04-17 | Carrier Corporation | Part load performance of variable speed screw compressor |
BE1013293A3 (nl) | 2000-02-22 | 2001-11-06 | Atlas Copco Airpower Nv | Werkwijze voor het besturen van een compressorinstallatie en aldus bestuurde compressorinstallatie. |
JP4415340B2 (ja) | 2000-06-02 | 2010-02-17 | 株式会社日立産機システム | スクリュー圧縮装置とその運転制御方法 |
GB2367333B (en) | 2000-09-25 | 2002-12-11 | Compair Uk Ltd | Improvements in variable speed oil-injected screw compressors |
US6860730B2 (en) | 2002-05-20 | 2005-03-01 | Driltech Mission, Llc | Methods and apparatus for unloading a screw compressor |
BE1015088A5 (nl) | 2002-09-03 | 2004-09-07 | Atlas Copco Airpower Nv | Verbeteringen aan compressors. |
BE1016727A4 (nl) | 2005-08-17 | 2007-05-08 | Atlas Copco Airpower Nv | Verbeterde inrichting voor het regelen van het debiet van een mobiele oliegeinjecteerde schroefcompressor. |
WO2008041996A1 (fr) * | 2006-10-06 | 2008-04-10 | Carrier Corporation | Système réfrigérant avec compresseur à modulation d'impulsions en durée à vitesse multiple |
US9145893B2 (en) * | 2011-06-08 | 2015-09-29 | Bendix Commercial Vehicle Systems Llc | Current control via speed control for driving screw compressor under cold conditions |
JP5568517B2 (ja) | 2011-06-22 | 2014-08-06 | 株式会社神戸製鋼所 | 蒸気駆動式圧縮装置 |
DE102013111218A1 (de) | 2013-10-10 | 2015-04-16 | Kaeser Kompressoren Se | Elektronische Steuerungseinrichtung für eine Komponente der Drucklufterzeugung, Druckluftaufbereitung, Druckluftspeicherung und/oder Druckluftverteilung |
DE102013113557A1 (de) * | 2013-12-05 | 2015-06-11 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | Kompressorsystem für ein Schienenfahrzeugs und Verfahren zum Betrieb des Kompressorsystems mit einem sicheren Notlaufbetrieb |
-
2015
- 2015-07-13 DE DE102015111287.6A patent/DE102015111287B4/de active Active
-
2016
- 2016-07-12 CN CN201680041450.2A patent/CN107923401B/zh not_active Expired - Fee Related
- 2016-07-12 CA CA2991806A patent/CA2991806A1/fr not_active Abandoned
- 2016-07-12 BR BR112018000483-9A patent/BR112018000483B1/pt active IP Right Grant
- 2016-07-12 WO PCT/EP2016/066469 patent/WO2017009307A1/fr active Application Filing
- 2016-07-12 US US15/742,111 patent/US10815996B2/en active Active
- 2016-07-12 EP EP16745062.6A patent/EP3322899B1/fr active Active
Also Published As
Publication number | Publication date |
---|---|
DE102015111287B4 (de) | 2018-04-26 |
US10815996B2 (en) | 2020-10-27 |
WO2017009307A1 (fr) | 2017-01-19 |
DE102015111287A1 (de) | 2017-01-19 |
US20180202443A1 (en) | 2018-07-19 |
CN107923401B (zh) | 2019-11-15 |
CA2991806A1 (fr) | 2017-01-19 |
BR112018000483A2 (pt) | 2018-09-11 |
EP3322899B1 (fr) | 2019-05-08 |
BR112018000483B1 (pt) | 2023-01-10 |
CN107923401A (zh) | 2018-04-17 |
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