DE3142896A1 - Coated rotors for rotary piston compressors - Google Patents

Coated rotors for rotary piston compressors

Info

Publication number
DE3142896A1
DE3142896A1 DE19813142896 DE3142896A DE3142896A1 DE 3142896 A1 DE3142896 A1 DE 3142896A1 DE 19813142896 DE19813142896 DE 19813142896 DE 3142896 A DE3142896 A DE 3142896A DE 3142896 A1 DE3142896 A1 DE 3142896A1
Authority
DE
Germany
Prior art keywords
rotors
rotary piston
coated
piston compressors
compressors
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.)
Withdrawn
Application number
DE19813142896
Other languages
German (de)
Inventor
Heinz Ing. 8036 Dresden Friedrich
Herbert Ing. 8021 Dresden Neumann
Alexander Dr.-Ing. 8060 Dresden Pietsch
Dieter Dr.-Ing. 1197 Berlin Prockat
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.)
Luft und Kaeltetechnik VEB
Original Assignee
Luft und Kaeltetechnik VEB
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 Luft und Kaeltetechnik VEB filed Critical Luft und Kaeltetechnik VEB
Publication of DE3142896A1 publication Critical patent/DE3142896A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/08—Rotary pistons
    • 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
    • F04C18/082—Details specially related to intermeshing engagement type pumps
    • F04C18/084—Toothed wheels

Landscapes

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

Abstract

The invention relates to rotors for rotary piston compressors in air conditioning and refrigeration systems. The compressors are intended to achieve a high degree of internal tightness in order to prevent losses in performance. With the solution according to the invention the rotors can be manufactured more economically. The gap sealing of the rotors is achieved in that the rotors are coated at the contactless points with a metallic or non-metallic material, whilst a tangent resulting from the profile geometry of the rotor flanks and serving for the transmission of forces, which lies in the area of the line of action of the rotors, remains uncoated and is created by a known process as the first re-machining operation.

Description

Beschiciltete Rotoren für RotationskolbenverdichterLabeled rotors for rotary piston compressors

Die Erfindung bezieht sich auf beschichtete Rotoren für Rotationskolbenverdichter, die in Klima- und Kälteanlagen zum Verdichten von Kältemittel angewendet werden.The invention relates to coated rotors for rotary piston compressors, which are used in air conditioning and refrigeration systems to compress refrigerants.

Bokanntlich werden die Schrauben bzw. Rotoren von RotationsIcolbenverdichtern zur Übertragung der Drehbewegung durch die Rotoren durch konventionelle Zerspanungsverfahren gefertigt. Die dabei auftretenden Fertigungstoleranzen und das funktionsbedingte Spiel zwischen den Rotoren führten zu Spalten und damit zu Leistungsverlusten. Zur Behebung dieser Verluste sind sehr eng begrenzte Fertigungstoleranzen notwendig, wodurch die Herstellung ser unwirtschaftlich wird.The screws and rotors of rotary piston compressors are known to be to transfer the rotary motion through the rotors using conventional machining processes manufactured. The resulting manufacturing tolerances and the function-related Clearance between the rotors led to gaps and thus to a loss of performance. To the Eliminating these losses, very tightly limited manufacturing tolerances are necessary. whereby the production of water becomes uneconomical.

Die Verluste durch das funktionsbedingte Spiel bleiben.The losses due to the functional game remain.

Ein Rotationslcolbenverdichter mit relativ hoher innerer Dichtheit ist in der DE-OS 1 944 942 dargestellt. Bei dieser Lösung erfolgt die Übertragung der Drehbewegung durch Zahnräder und nicht durch die Rotorpaare selbst.A rotary piston compressor with a relatively high internal tightness is shown in DE-OS 1,944,942. With this solution, the transmission takes place the rotary movement by gears and not by the rotor pairs themselves.

Die Dichtheit wird durch eine Beschichtung der ltotorerl erzeugt. Der Beschichtungsstoff ist derart aufgebracht, daß er sich beim Einlaufen der Rotoren an sicii berührenden Stellen abträgt bzw. verschiebt. Da aber die Kraftübertragung nicht direkt durch die Rotoren erfolgt ist eine wesentliche, zur Abdichtung ausreichende Berührung der Rotoren nicht gewährleistet. Sicher findet eine Spaltverengung statt, jedoch cine zuverlässige Spaltabdichtung.The tightness is created by a coating of the ltotorerl. The coating material is applied in such a way that it moves when the rotors run in removes or shifts at points in contact with sicii. But there is the power transmission not done directly through the rotors is an essential one that is sufficient for sealing Contact with the rotors is not guaranteed. There is sure to be a narrowing of the gap, however, a reliable gap seal.

Ziel der Erfindung ist ein Rotationslzolbonvordichtcr mit großer innerer Dichtheit, um Leistung@verluste zu vermeiden und die Uleinspritzmenge zu reduzieren. Dabei soll die Möglichkeit geschaffen werden, Rotoren ökonomischer zu fertigen.The aim of the invention is a rotary bottle sealer with a large internal volume Tightness in order to avoid loss of performance and to reduce the quantity of fuel injected. The aim is to make it possible to manufacture rotors more economically.

Der Erfindung liegt die Aufgabe zugrunde, an herkömmlich gefertigten, mit funktions- und fertigungsbedingten Spalten behafteten Rotorpaaren eine optimale und sichere Spaltabdichtung zu schaffen.The invention is based on the object of conventionally manufactured, with function- and production-related gaps afflicted rotor pairs an optimal and to create secure gap sealing.

Erfindungsgemäß werden die zur Kraftübertragung dienenden Rotoren von Rotationskolbenverdichtern durch ein geeignetes Verfahren mit einem metallischen oder nichtmetallischen Werkstoff beschiclltet. Dabei soll aber eine ideale Berührungslinie an den Rotorflanken von der Beschichtung ausgeschlossen sein, d. h. die Beschichtung erfolgt an den berührungslosen Stellen der Rotoren. Die Berührungslinie ergibt sich aus der Profilgeometrie der Rotorflanken und wird als erster Nacharbeitsgang durch ein geeignetes an sich bekanntes Verfahren, wie Umformen oder Läppen, in die ideale Form gebracht zur Gewährleistung der exakten Linienberührung der Rotoren flanken bei der Kraftübertragung. Die Berührungslinie unterliegt somit einem mechanischen Verschleiß.The rotors used for power transmission are according to the invention of rotary piston compressors by a suitable Procedure with coated with a metallic or non-metallic material. But it should an ideal contact line on the rotor flanks is excluded from the coating be, d. H. the coating takes place at the non-contact areas of the rotors. The contact line results from the profile geometry of the rotor flanks and is as the first reworking step by a suitable method known per se, such as Forming or lapping, brought into the ideal shape to ensure the exact Line contact of the rotors flanks during power transmission. The line of contact is therefore subject to mechanical wear.

Die zusammengehörenden kraftübertragenden Rotoren von Schraubenverdichtern werden durch ein Beschichtungsverfahren, beispielsweise Streichbeschichten, elektrolytisches Beschichten, Läppen oder Beschichten mit nachträglichem Umformen mit einem Beschichtungsstoff belegt.The matching power-transmitting rotors of screw compressors are electrolytic by a coating process such as brush coating Coating, lapping or coating with subsequent reshaping with a coating material proven.

Der Beschichtungsstoff ist wahlweise metallisch, z. B.The coating material is optionally metallic, e.g. B.

Zinn oder nichtmetallisch, z. B. Plast.Tin or non-metallic, e.g. B. Plast.

Dic Deschichtung erfolgt an den Stellen der Rotorflanken, die nicht unmittelbar der Kraftübertragung dienen. Die zur Kraftübertragung erforderliche Berührungslinie der Rotoren selbst wird nicht beschichtet, sondern in einem ersten Nacharbeitsgang durch ein bekanntes Verfahren in die ideale Form gebracht. Diese Berührungslinie, die im Bereich der Eingriffslinie der Rotorflanken liegt, ergibt sich durch die entsprechende Profilgeometrie.The layering takes place at the points on the rotor flanks that are not serve directly to transmit power. The one required for power transmission The contact line of the rotors themselves is not coated, but in a first one Reworking process brought into the ideal shape using a known process. These Line of contact that in the area of the line of action of the rotor flanks is determined by the corresponding profile geometry.

Dadurch wird es möglich, Rotoren für Rotationskolbenverdichter mit relativ großen Pertigungstoleranzon, d. h. ökonomischer herzustellen und einzusetzen. Durch die erfindungsgemäße Nacharbeit an den Rotoren wird mit dem Verdichter ein hoher Wirkungsgrad erzielt.This makes it possible to use rotors for rotary piston compressors relatively large manufacturing tolerance, d. H. more economical to manufacture and use. The rework according to the invention on the rotors is a high efficiency achieved.

Da die Abdichtung vorwiegend durch das Beschichtungsmaterial übernommen wird, kann bei ölüberfluteten Verdichtern die Uleinspritzmenge reduziert werden, da das 1 nur noc zur Schmierung und Kühlung benötigt wird, was ebenfalls wegen. geringerer Flüssigkeitsreibung und geringerer Förderarbeit zu einer Wirkungsgraderhöhung beiträgt.Since the seal is mainly taken over by the coating material the oil injection quantity can be reduced in the case of oil-flooded compressors, since the 1 is only needed for lubrication and cooling, which is also because of. lower fluid friction and lower pumping work to an increase in efficiency contributes.

Claims (3)

Patentansprüch 1. Beschichtete Rotoren für Rotationskolbenverdichter in Klima- und Kälteanlagen, gekennzeichnet dadurch, daß die Rotoren zur Kraftübertragung dienende, durch ein an sich bekanntes Verfahren geschaffene Berührungslinien aufweisen und allo außerhalb dieser Berührungslinien vorhandenen Spalten mit einem Beschichtungsstoff abgedichtet sind.Claims 1. Coated rotors for rotary piston compressors in air conditioning and refrigeration systems, characterized in that the rotors for power transmission serving lines of contact created by a method known per se and all gaps with a coating material outside these lines of contact are sealed. 2. Beschichtete Rotoren nach Anspruch 1, gekennzeichnet dadurch, daß der Beschichtungsstoff aus einem nicht metallischen Stoff, vorzugsweise Plast besteht.2. Coated rotors according to claim 1, characterized in that the coating material consists of a non-metallic material, preferably plastic. 3. Beschichtete Rotoren nach Anspruch1, gekennzeichnet dadurch, daß der Beschichtungsstoff aus einem metallischen Stoff, vorzugsweise Zinn besteht.3. Coated rotors according to claim 1, characterized in that the coating material consists of a metallic substance, preferably tin.
DE19813142896 1980-12-05 1981-10-29 Coated rotors for rotary piston compressors Withdrawn DE3142896A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DD22576880A DD155102A1 (en) 1980-12-05 1980-12-05 COATED ROTORS FOR ROTATION PISTON COMPRESSORS

Publications (1)

Publication Number Publication Date
DE3142896A1 true DE3142896A1 (en) 1982-08-26

Family

ID=5527656

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19813142896 Withdrawn DE3142896A1 (en) 1980-12-05 1981-10-29 Coated rotors for rotary piston compressors

Country Status (3)

Country Link
DD (1) DD155102A1 (en)
DE (1) DE3142896A1 (en)
SE (1) SE450406B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0209788A2 (en) * 1985-07-26 1987-01-28 Toyota Jidosha Kabushiki Kaisha A roots type pump
EP0281654A1 (en) * 1987-03-11 1988-09-14 Leybold Aktiengesellschaft Two-shaft machine

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3740696A1 (en) * 1987-12-01 1989-06-15 Erich Fuergut Vane pump for gases, vapours or similar pressure media
DE19844904C1 (en) * 1998-09-30 2000-02-17 Luk Automobiltech Gmbh & Co Kg Vacuum pump for brake amplifier
DE10059275A1 (en) 1999-12-23 2001-06-28 Luk Automobiltech Gmbh & Co Kg Vacuum pump especially for motor vehicle's servo brake system has rotor or vane consisting of aluminum or aluminum alloy, constructed in one piece, and with rotor manufactured through non-cutting forming

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0209788A2 (en) * 1985-07-26 1987-01-28 Toyota Jidosha Kabushiki Kaisha A roots type pump
EP0209788A3 (en) * 1985-07-26 1987-09-16 Toyota Jidosha Kabushiki Kaisha A roots type pump
US4764098A (en) * 1985-07-26 1988-08-16 Toyota Jidosha Kabushiki Kaisha Roots type pump with pin connection for plastic coated rotor
EP0281654A1 (en) * 1987-03-11 1988-09-14 Leybold Aktiengesellschaft Two-shaft machine
US4974318A (en) * 1987-03-11 1990-12-04 Leybold Aktiengesellschaft Method of making a dual-shaft machine

Also Published As

Publication number Publication date
SE450406B (en) 1987-06-22
SE8107192L (en) 1982-06-06
DD155102A1 (en) 1982-05-12

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Legal Events

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8141 Disposal/no request for examination