EP0014836B1 - Vane pump, especially for power steering - Google Patents

Vane pump, especially for power steering Download PDF

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Publication number
EP0014836B1
EP0014836B1 EP80100167A EP80100167A EP0014836B1 EP 0014836 B1 EP0014836 B1 EP 0014836B1 EP 80100167 A EP80100167 A EP 80100167A EP 80100167 A EP80100167 A EP 80100167A EP 0014836 B1 EP0014836 B1 EP 0014836B1
Authority
EP
European Patent Office
Prior art keywords
cover
vane pump
ring
rotor
curved bottom
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.)
Expired
Application number
EP80100167A
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German (de)
French (fr)
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EP0014836A1 (en
Inventor
Heinz Krüger
Heinz Teubler
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.)
Sperry Vickers Zweigniederlassung Der Sperry GmbH
Original Assignee
Sperry Vickers Zweigniederlassung Der Sperry 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.)
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Publication date
Application filed by Sperry Vickers Zweigniederlassung Der Sperry GmbH filed Critical Sperry Vickers Zweigniederlassung Der Sperry GmbH
Publication of EP0014836A1 publication Critical patent/EP0014836A1/en
Application granted granted Critical
Publication of EP0014836B1 publication Critical patent/EP0014836B1/en
Expired 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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00

Definitions

  • Vane pumps of this type are required in large numbers, so that their rational and cost-effective production is extremely important. For this reason, the housing cover is made of deep-drawn steel. Vane pumps must also be as quiet as possible in order to meet the requirement for low noise in vehicles.
  • the invention has for its object to provide a vane pump that has a noise reduction of about 10 dB while maintaining a cheap to manufacture construction.
  • the object is achieved in that the space between the curved bottom and the annular edge of the housing cover is covered by a sheet coated with anti-drumming compound, with a space remaining to the cover bottom.
  • the space between the lid base and the coated sheet metal is expediently connected to the external atmosphere by fine bores in the coated sheet metal. Through these fine holes only a little sound penetrates to the outside, on the other hand it can be prevented that the sheet metal is acoustically coupled to the housing cover.
  • the coated plate can be clamped together with the housing cover by a snap ring in the housing, but it would also be possible to fix the plate to the edge of the housing cover, for example by spot welding.
  • the vane pump has a cup-shaped housing 1 with an interior 1 a, which is closed by a cup-shaped cover 2.
  • this interior 1a sit, fixed to the housing, two cheek plates 3, 4 and a contour ring 5, and. Although these parts are secured against rotation by means of pins 6.
  • a rotor 7 is arranged within the contour ring 5 and between the cheek plates 3, 4 and has a series of radial guide slots 7a. Wings 8 are mounted radially displaceably within these guide slots 7a.
  • the rotor 7 can be driven via a shaft 9 which is seated in a bearing bore which is mounted opposite the cover 2.
  • the rotor 7 is cylindrical in shape, while the contour ring has an approximately oval inner contour, the small axis of which corresponds approximately to the diameter of the rotor 7, while the large axis determines the extension length of the vanes 8.
  • two crescent-shaped spaces 11 and 12 lie between the contour ring 5 and the rotor, which are divided by the vanes 8 into a number of working spaces 11a to 11d or 12a to 12d.
  • the working space 11b or 12b is larger than the working space 11a, 12a, so that one is in the direction of rotation shown on the suction side of the system, while the working spaces 11c, 12c narrow to the working spaces 11d, 12d, so that the print side of the system can be found there.
  • the cheek plate 3 therefore has two opposing kidney-shaped inlet openings, not shown, which form part of the suction channel, which begins at 15 (FIG. 1).
  • the channel 15 meets an approximately radially running channel 16 (FIG. 2), which opens into the interior 1 a of the housing 1, an annular space 17 remaining between the outer circumference of the contour ring 5 and the cheek plate 3.
  • two kidney-shaped outlet openings 21, 22 are provided in the cheek plate 4, which open into a pressure chamber 23 which lies between the cover 2 and the cheek plate 4.
  • a helical or conical spring 24 is also accommodated, which presses the cheek plate 4 in sealing contact against the rotor 7 and this against the cheek plate 3.
  • the pressure chamber 23 is connected by a channel 25 to a short-circuit valve 28.
  • a transverse channel 26 branches off from the channel 25 to the outlet 27.
  • the short-circuit valve 28 is arranged between the channels 25 and 16 and opens an overflow path at an adjustable pressure.
  • the cup-shaped cover 2 (Fig. 2) is made of deep-drawn steel and has one curved bottom 30 and an annular edge 31. An open space is thus formed, which has an essentially cylindrical shape with a somewhat raised center. This space is covered by a sheet 34 coated with anti-drumming compound 33, so that a remaining intermediate space 35 remains. This remaining intermediate space 35 is connected to the outside via fine bores 36 in order to counteract a certain acoustic coupling between the cover 2 and the sheet metal 34.
  • the cover 2 is fixed together with the sheet metal 34 by means of a snap ring 37 in the interior 1 a of the drop-shaped housing 1. However, it is also possible to fasten the plate 34 to the edge 31 of the cover 2, for example by spot welding.

Description

Der Anmeldungsgegenstand bezieht sich auf eine Flügelzellenpumpe, insbesondere zur Lenkhilfe, mit folgendem Aufbau:

  • Ein topfförmiges Gehäuse mit Saug- und Druckkanälen und ein napfförmiger, aus tiefgezogenem Stahl hergestellter Gehäusedeckel mit nach innen gewölbtem Boden und ringförmigem Rand umschließen einen Konturring und zwei Wangenplatten, die einen Rotor mit radial verschieblichen Flügeln einschließen; zwischen dem Konturring und dem Rotor liegen sichelförmige Räume, die von den Flügeln in wandernde Arbeitsräume unterteilt werden und in deren Erweiterungsbereich (in Pumpendrehrichtung gesehen) der Saugkanal mündet sowie aus deren Vereinigungsbereich der Druckkanal abzweigt; der Saugkanal durchdringt die eine Wangenplatte mit einer Anzahl der sichelförmigen Räume entsprechenden Anzahl von Einlaßöffnungen und der Druckkanal durchdringt die andere Wangenplatte mit einer entsprechenden Anzahl von Auslaßöffnungen, die in einen Druckraum hinter dem Gehäusedeckel einmünden.
The subject of the application relates to a vane pump, in particular for steering assistance, with the following structure:
  • A cup-shaped housing with suction and pressure channels and a cup-shaped housing cover made of deep-drawn steel with an inwardly curved bottom and an annular rim enclose a contour ring and two cheek plates, which enclose a rotor with radially displaceable blades; between the contour ring and the rotor are crescent-shaped spaces, which are divided by the wings into moving work spaces and in whose extension area (seen in the direction of pump rotation) the suction channel opens and from which the pressure channel branches off; the suction channel penetrates the one cheek plate with a number of inlet openings corresponding to a number of sickle-shaped spaces and the pressure channel penetrates the other cheek plate with a corresponding number of outlet openings which open into a pressure space behind the housing cover.

Solche Flügelzellenpumpen werden in großer Stückzahl benötigt, so daß ihre rationelle und kostengünstige Herstellung äußerst bedeutsam ist. Aus diesem Grunde besteht der Gehäusedeckel aus tiefgezogenem Stahl. Flügelzellenpumpen müssen aber auch möglichst leise sein, um der Forderung nach Geräuscharmut in Fahrzeugen zu genügen.Vane pumps of this type are required in large numbers, so that their rational and cost-effective production is extremely important. For this reason, the housing cover is made of deep-drawn steel. Vane pumps must also be as quiet as possible in order to meet the requirement for low noise in vehicles.

Der Erfindung liegt die Aufgabe zugrunde, eine Flügelzellenpumpe zu schaffen, die unter Beibehaltung einer billig herzustellenden Konstruktion eine Geräuschverminderung um etwa 10 dB aufweist.The invention has for its object to provide a vane pump that has a noise reduction of about 10 dB while maintaining a cheap to manufacture construction.

Die gestellte Aufgabe wird dadurch gelöst, daß der Raum zwischen gewölbtem Boden und ringförmigem Rand des Gehäusedeckels durch ein mit Antidröhnmasse beschichtetes Blech abgedeckt ist, wobei noch ein Zwischenraum zum Deckelboden verbleibt.The object is achieved in that the space between the curved bottom and the annular edge of the housing cover is covered by a sheet coated with anti-drumming compound, with a space remaining to the cover bottom.

Die gemessene Geräuschverminderung um 10 dB ist äußerst überraschend, wenn man bedenkt, mit welch geringem Aufwand diese Geräuschverminderung erzielt wird.The measured noise reduction of 10 dB is extremely surprising when you consider how little effort this noise reduction can be achieved.

Der Zwischenraum zwischen Deckelboden und beschichtetem Blech wird zweckmäßig durch feine Bohrungen in dem beschichteten Blech mit der äußeren Atmosphäre verbunden. Durch diese feinen Bohrungen dringt nur wenig Schall nach außen, andererseits kann verhindert werden, daß das Blech zu stark akustisch mit dem Gehäusedeckel gekoppelt ist.The space between the lid base and the coated sheet metal is expediently connected to the external atmosphere by fine bores in the coated sheet metal. Through these fine holes only a little sound penetrates to the outside, on the other hand it can be prevented that the sheet metal is acoustically coupled to the housing cover.

Das beschichtete Blech kann zusammen mit dem Gehäusedeckel durch einen Sprengring im Gehäuse geklemmt sein, es wäre aber auch möglich, das Blech etwa durch Punktschweißen am Rand des Gehäusedeckels zu befestigen.The coated plate can be clamped together with the housing cover by a snap ring in the housing, but it would also be possible to fix the plate to the edge of the housing cover, for example by spot welding.

Ein Ausführungsbeispiel v.'ird anhand der Zeichnung beschrieben. Dabei zeigt

  • Fig. 1 einen vertikalen Querschnitt durch eine Flügelzellenpumpe,
  • Fig. 2 einen vertikalen Längsschnitt durch die Flügelzellenpumpe gemäß Linie 11-11 in Fig. 1.
An embodiment v. ' is described with reference to the drawing. It shows
  • 1 is a vertical cross section through a vane pump,
  • FIG. 2 shows a vertical longitudinal section through the vane pump according to line 11-11 in FIG. 1.

Die Flügelzellenpumpe weist ein topfförmiges Gehäuse 1 mit einem Innenraum 1a auf, der durch einen napfförmigen Deckel 2 verschlossen ist. In diesem Innenraum 1a sitzen, gehäusefest angeordnet, zwei Wangenplatten 3, 4 und ein Konturring 5, und.zwar sind diese Teile mittels Stifte 6 drehgesichert. Innerhalb des Konturringes 5 und zwischen den Wangenplatten 3, 4 ist ein Rotor 7 angeordnet, der eine Reihe von radialen Führungsschlitzen 7a besitzt. Innerhalb dieser Führungsschlitze 7a sind Flügel 8 radial verschieblich gelagert. Der Rotor 7 ist über eine Welle 9 antreibbar, die in. einer Lagerbohrung sitzt, die gegenüber dem Deckel 2 angebracht ist. Der Rotor 7 ist zylindrisch geformt, während der Konturring einen etwa ovalen Innenumriß aufweist, dessen kleine Achse etwa dem Durchmesser des Rotors 7 entspricht, während die große Achse die Auszugslänge der Flügel 8 bestimmt. Auf diese Weise liegen zwischen dem Konturring 5 und dem Rotor zwei sichelförmige Räume 11 und 12, die von den Flügeln 8 in eine Anzahl von Arbeitsräumen 11a bis 11d bzw. 12a bis 12d unterteilt werden. Wie ersichtlich, ist der Arbeitsraum 11b bzw. 12b größer als der Arbeitsraum 11a, 12a, so daß man sich bei der eingezeichneten Drehrichtung auf der Saugseite des Systems befindet, während sich die Arbeitsräume 11c, 12c zu den Arbeitsräumen 11d, 12d verschmälern, so daß dort die Druckseite des Systems anzutreffen ist. Die Wangenplatte 3 weist deshalb zwei sich gegenüberstehende, nicht dargestellte, nierenförmige Einlaßöffnungen auf, die einen Teil des Saugkanals bilden, der bei 15 (Fig. 1) beginnt. Der Kanal 15 trifft auf einen etwa radial laufenden Kanal 16 (Fig. 2), der in den Innenraum 1a des Gehäuses 1 einmündet, wobei zwischen dem Außenumfang des Konturringes 5 sowie der Wangenplatte 3 ein ringförmiger Raum 17 verbleibt.The vane pump has a cup-shaped housing 1 with an interior 1 a, which is closed by a cup-shaped cover 2. In this interior 1a sit, fixed to the housing, two cheek plates 3, 4 and a contour ring 5, and. Although these parts are secured against rotation by means of pins 6. A rotor 7 is arranged within the contour ring 5 and between the cheek plates 3, 4 and has a series of radial guide slots 7a. Wings 8 are mounted radially displaceably within these guide slots 7a. The rotor 7 can be driven via a shaft 9 which is seated in a bearing bore which is mounted opposite the cover 2. The rotor 7 is cylindrical in shape, while the contour ring has an approximately oval inner contour, the small axis of which corresponds approximately to the diameter of the rotor 7, while the large axis determines the extension length of the vanes 8. In this way, two crescent-shaped spaces 11 and 12 lie between the contour ring 5 and the rotor, which are divided by the vanes 8 into a number of working spaces 11a to 11d or 12a to 12d. As can be seen, the working space 11b or 12b is larger than the working space 11a, 12a, so that one is in the direction of rotation shown on the suction side of the system, while the working spaces 11c, 12c narrow to the working spaces 11d, 12d, so that the print side of the system can be found there. The cheek plate 3 therefore has two opposing kidney-shaped inlet openings, not shown, which form part of the suction channel, which begins at 15 (FIG. 1). The channel 15 meets an approximately radially running channel 16 (FIG. 2), which opens into the interior 1 a of the housing 1, an annular space 17 remaining between the outer circumference of the contour ring 5 and the cheek plate 3.

Winkelmäßig versetzt zu den nicht dargestellten Einlaßöffnungen sind in der Wangenplatte 4 zwei nierenförmige Auslaßöffnungen 21, 22 vorgesehen, die in einen Druckraum 23 münden, der zwischen dem Deckel 2 und der Wangenplatte 4 liegt. In dem Druckraum 23 ist ferner eine Schrauben- oder Kegelfeder 24 untergebracht, die die Wangenplatte 4 in dichtender Anlage gegen den Rotor 7 und diesen gegen die Wangenplatte 3 preßt. Der Druckraum 23 ist durch einen Kanal 25 mit einem Kurzschlußventil 28 verbunden. Von dem Kanal 25 zweigt ein Querkanal 26 zum Auslaß 27 ab. Zwischen den Kanälen 25 und 16 ist das Kurzschlußventil 28 angeordnet, welches bei einem einstellbaren Druck einen Überströmweg öffnet.Angularly offset from the inlet openings (not shown), two kidney-shaped outlet openings 21, 22 are provided in the cheek plate 4, which open into a pressure chamber 23 which lies between the cover 2 and the cheek plate 4. In the pressure chamber 23 a helical or conical spring 24 is also accommodated, which presses the cheek plate 4 in sealing contact against the rotor 7 and this against the cheek plate 3. The pressure chamber 23 is connected by a channel 25 to a short-circuit valve 28. A transverse channel 26 branches off from the channel 25 to the outlet 27. The short-circuit valve 28 is arranged between the channels 25 and 16 and opens an overflow path at an adjustable pressure.

Der napfförmige Deckel 2 (Fig. 2) ist aus tiefgezogenem Stahl hergestellt und weist einen gewölbten Boden 30 sowie einen ringförmigen Rand 31 auf. Es wird so ein nach außen offener Raum gebildet, der eine im wesentlichen zylindrische Form bei etwas erhöhter Mitte besitzt. Dieser Raum wird abgedeckt durch ein mit Antidröhnmasse 33 beschichtetes Blech 34, so daß noch ein Restzwischenraum 35 verbleibt. Dieser Restzwischenraum 35 ist über feine Bohrungen 36 mit dem Freien verbunden, um einer gewissen akustischen Kopplung zwischen dem Deckel 2 und dem Blech 34 entgegenzuwirken. Der Deckel 2 ist zusammen mit dem Blech 34 mittels eines Sprengringes 37 in dem Innenraum 1a des tropfförmigen Gehäuses 1 festgelegt. Es ist aber auch möglich, das Blech 34 mit dem Rand 31 des Deckels 2 zu befestigen, beispielsweise durch Punktschweißen.The cup-shaped cover 2 (Fig. 2) is made of deep-drawn steel and has one curved bottom 30 and an annular edge 31. An open space is thus formed, which has an essentially cylindrical shape with a somewhat raised center. This space is covered by a sheet 34 coated with anti-drumming compound 33, so that a remaining intermediate space 35 remains. This remaining intermediate space 35 is connected to the outside via fine bores 36 in order to counteract a certain acoustic coupling between the cover 2 and the sheet metal 34. The cover 2 is fixed together with the sheet metal 34 by means of a snap ring 37 in the interior 1 a of the drop-shaped housing 1. However, it is also possible to fasten the plate 34 to the edge 31 of the cover 2, for example by spot welding.

. Es bleibt überraschend, daß ein einfacheres, mit Antidröhnmasse beschichtetes Blech 34 eine Reduzierung der abgegebenen Schallenergie um 10 dB bewirkt.. It remains surprising that a simpler sheet 34 coated with an anti-drumming compound reduces the sound energy emitted by 10 dB.

Claims (3)

1. Sliding vane pump, especially steering pump, comprising the following arrangement:
a) a cup shaped body (1) having suction and pressure ducts and a cup shaped cover (2) made up of deep-drawn sheet steel having an inwardly curved bottom (30) and a'ring like border (31) enclosing a cam ring (5) and two cheek plates (3, 4) which sandwich a rotor (7) having radially slidably vanes (8);
b) between the cam ring (5) and the rotor (7) sickle shaped spaces are arranged which are subdivided by the vanes (8) to form rotating working chambers each having an extending area (seen in rotational direction) wherein the suction duct enters, and a narrowing area wherefrom the pressure duct braches off;
c) the suction duct forming inlet openings according to the number of the sickle shaped spaces passes through one of the cheek plates and the pressure duct forming outlet openings of equal number passes through the outer cheek plate and enters into a pressure chamber (23) arranged behind the cover; ,

characterized by the following features:
d) the space between curved bottom (30) and ring like border (31) of the cover (2) is covered by a sheet metal (34) which is layered by a noise damping mass leaving a distance space (35) to the curved bottom (30).
2. Sliding vane pump set forth in claim 1, characterized in that the distance space (35) is connected by fine holes to the outer atmosphere.
3. Sliding vane pump set forth in claim 1 or 2, characterized in that the layered sheet metal (34), together with the cover (2), is clamped within the body (1) by a spring ring (37).
EP80100167A 1979-02-12 1980-01-14 Vane pump, especially for power steering Expired EP0014836B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19792905273 DE2905273A1 (en) 1979-02-12 1979-02-12 WING CELL PUMP, IN PARTICULAR TO STEERING AID
DE2905273 1979-02-12

Publications (2)

Publication Number Publication Date
EP0014836A1 EP0014836A1 (en) 1980-09-03
EP0014836B1 true EP0014836B1 (en) 1982-01-06

Family

ID=6062737

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80100167A Expired EP0014836B1 (en) 1979-02-12 1980-01-14 Vane pump, especially for power steering

Country Status (2)

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EP (1) EP0014836B1 (en)
DE (2) DE2905273A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3623421A1 (en) * 1986-07-11 1988-01-14 Vickers Systems Gmbh STEERING PUMP

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5180298A (en) * 1991-01-23 1993-01-19 Imo Industries Inc. Hydraulic pump with foamed elastomeric member in outlet chamber to reduce liquid-borne noise
DE102007024190A1 (en) * 2007-05-24 2008-11-27 Trw Automotive Gmbh gear pump
DE102016211057A1 (en) * 2016-05-30 2017-11-30 Schwäbische Hüttenwerke Automotive GmbH Conveying element for a rotary pump

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2311916A (en) * 1939-06-24 1943-02-23 Gunnar A Wahlmark Fuel pump
US2460649A (en) * 1942-03-07 1949-02-01 Geza W Muiler Gear pump with flow cushioning means
US2803196A (en) * 1953-12-16 1957-08-20 Sundstrand Machine Tool Co Pump
GB1178635A (en) * 1967-01-03 1970-01-21 Chrysler Corp Improved Rotary Positive-Displacement Hydraulic Pump
DE2637979A1 (en) * 1976-08-24 1978-03-02 Bosch Gmbh Robert FUEL FEED PUMP

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3623421A1 (en) * 1986-07-11 1988-01-14 Vickers Systems Gmbh STEERING PUMP

Also Published As

Publication number Publication date
EP0014836A1 (en) 1980-09-03
DE2905273A1 (en) 1980-08-28
DE3060132D1 (en) 1982-02-25

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