WO2013017343A1 - Piston pump - Google Patents

Piston pump Download PDF

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Publication number
WO2013017343A1
WO2013017343A1 PCT/EP2012/062398 EP2012062398W WO2013017343A1 WO 2013017343 A1 WO2013017343 A1 WO 2013017343A1 EP 2012062398 W EP2012062398 W EP 2012062398W WO 2013017343 A1 WO2013017343 A1 WO 2013017343A1
Authority
WO
WIPO (PCT)
Prior art keywords
pump
piston
sealing ring
pump housing
annular gap
Prior art date
Application number
PCT/EP2012/062398
Other languages
German (de)
French (fr)
Inventor
Dieter Dinkel
Original Assignee
Continental Teves Ag & Co. Ohg
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 Continental Teves Ag & Co. Ohg filed Critical Continental Teves Ag & Co. Ohg
Priority to CN201280038103.6A priority Critical patent/CN103732916B/en
Priority to KR1020147002541A priority patent/KR20140045519A/en
Priority to US14/234,407 priority patent/US20140178224A1/en
Priority to EP12729644.0A priority patent/EP2739851A1/en
Publication of WO2013017343A1 publication Critical patent/WO2013017343A1/en

Links

Classifications

    • 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
    • F04B53/14—Pistons, piston-rods or piston-rod connections
    • F04B53/143—Sealing provided on the piston
    • 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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0408—Pistons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/02—Arrangements of pumps or compressors, or control devices therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/40—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
    • B60T8/4031—Pump units characterised by their construction or mounting
    • 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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0421—Cylinders
    • 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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0439—Supporting or guiding means for the pistons
    • 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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/053—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with actuating or actuated elements at the inner ends of the cylinders
    • 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
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • F04B53/162—Adaptations of cylinders
    • F04B53/164—Stoffing boxes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
    • F16J15/3208—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip provided with tension elements, e.g. elastic rings
    • F16J15/3212—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip provided with tension elements, e.g. elastic rings with metal springs

Definitions

  • the invention relates to a piston pump, in particular for pressure medium conveying in hydraulic brake systems
  • a Piston pump of the specified type to improve such that fewer, compact components are needed, and at the same time an improved seal along the shell ⁇ surface of the pump piston is guaranteed.
  • Fig. 1 in longitudinal section on a pump piston arranged the essential guiding and sealing elements, consisting of a pressed into abutment in the pump housing guide band and a previously fixed in PumpengePFu ⁇ se sealing ring which is delimited by an annular gap fixed by a support ring in the pump housing is
  • FIG. 2 deviating from Figure 1 in longitudinal section a UNMIT ⁇ telbar to stop in the pump housingssenpress- th sealing ring with a previously arranged guide band, which is separate from the sealing ring by an annular gap.
  • FIG. 1 shows a sectional view of a Kol ⁇ benpumpe in a longitudinal section, which is preferably used for Druckmit ⁇ tel contemporary in hydraulic brake systems with slip control used.
  • the pump housing 7 of the piston pump is partially shown and has several the function the piston pump-determining pump components, such as in a ring-shaped guide belt 8 sections guided end of a pump piston 6, diametrically to the guide belt 8 egg ⁇ nen as a follow-up space 12 for the liquid running annulus and a voltage applied to the outer surface of the pump piston 6 elastic sealing ring 1 for leak-free sealing the piston end in the direction of a piston drive ⁇ space 13, which receives as an example for the pump piston an eccentric with an eccentric bearing.
  • the pump piston 6 and the follower space 12 are also shown only in the relevant area for the invention, so that the details recognizable from FIG. 1 are limited to what is necessary.
  • the region of the piston pump not shown on the left of the pump piston 6 essentially comprises a delivery chamber, a piston return spring and a suction and pressure valve with the associated suction and pressure connections.
  • the invention provides that the elastic sealing ring 1 with an axially directed, annular circumferential groove 3 (so-called. Annular) is provided, thus the side used a spring element 2 takes on ⁇ , which presses the sealing lip of the sealing ring 1 on the pump piston ⁇ 6.
  • the spring element 2 is designed as a radial force he ⁇ generating expansion element.
  • the elastic sealing ring 1 is made of a material with too Test purposes sufficiently good dry running properties produced, for which especially polytetrafluoroethylene (PTFE) is suitable.
  • PTFE polytetrafluoroethylene
  • the sealing ring 1 is fixed directly between the guide belt 8 and a pressed into the stepped bore 10 of the pump housing 7 support ring 4, wherein advantageously between the support ring 4 and the sealing ring 1 an annular gap 5 for unimpeded lubrication of the pump piston 6 and thus also Lubrication of the sealing lip of the sealing ring 1 is provided with the sucked by the pump piston 6 via the follow-up chamber 12 pressure medium.
  • a hydraulic connection via an arranged between the support ring 4 and the pump piston 6 axial gap 9 is provided to the piston lubrication, which extends up to the annular gap 5 so that a simple, reliable manner via the axial gap 9 during operation of the piston pump and the annular gap 5 is a Schmiermit ⁇ telharm of the follow-up space 12 to the sealing ring 1 is made.
  • a lubricant in this case commonly used in hydraulic devices ⁇ rule braking systems and funded by the piston pump brake fluid is used.
  • an axial gap 9 is also in Figure 2 for lubrication of the pump piston 6 in the region of the sealing ring 1 between the annular guide belt 8 and the sealing ring 1 arranged, the annular gap to the fifth extends, creating a pressure medium connection is Herge ⁇ represents a reliable manner between the filled during operation of the piston pump with Hydraulikflüs ⁇ stechnik supply chamber 12 and the space enclosed by the sealing ring 1 pump piston. 6
  • the axial gap 9 is embedded in the simplest embodiment as a longitudinal notch on the circumference of the annular guide strip 8.
  • the groove 3 are each carried out in the embodiment of Figure 2 as the side opening into the sealing ring 1 and of the side surface of the seal ring 3 rotate ⁇ de annular groove whose groove opening is the annular gap faces 5 to ⁇ , which is advantageously the operating medium, usually the to be pumped brake fluid is exposed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Sealing Devices (AREA)

Abstract

The invention relates to a piston pump having a pump housing (7) comprising a plurality of pump components determining the function of the piston pump, such as a pump piston (6) which is guided in sections, a piston return spring, and a suction and pressure valve. Said piston pump also has an annular chamber which delimits the pump piston (6) on the suction side and is designed as a compensating chamber (12) for the liquid, a delivery chamber which delimits the pump piston (6) on the pressure side, and an elastic sealing ring (1) for sealing the pump piston (6) in the direction of a pump drive chamber (13). To prevent leakage in the direction of the pump drive chamber (13), the elastic sealing ring (1) is provided with a groove (3) into which is inserted a spring element (2) which presses the sealing ring (1) against the pump piston (6).

Description

Kolbenpumpe  piston pump
Die Erfindung betrifft eine Kolbenpumpe, insbesondere zur Druckmittelförderung in hydraulischen Bremsanlagen mit The invention relates to a piston pump, in particular for pressure medium conveying in hydraulic brake systems
Schlupfregelung, nach dem Oberbegriff des Patentanspruchs 1. Slip control, according to the preamble of claim 1.
Aus DE 10 2010 028 539 AI ist bereits eine derartige Kolben¬ pumpe bekannt, mit einem Pumpengehäuse, das mehrere die Funktion der Kolbenpumpe bestimmende Pumpenbauteile wie ei¬ nen Pumpenkolben, eine Kolbenrückstellfeder sowie ein From DE 10 2010 028 539 Al, such a piston ¬ pump is already known, with a pump housing having a plurality of the function of the piston pump determining pump components such as ei ¬ nen pump piston, a piston return spring and a
Saug- und Druckventil aufweist, sowie mit einem den Pumpen¬ kolben saugseitig begrenzenden, als Nachlaufraum für die Flüssigkeit ausgeführten Ringraum und einem den Pumpenkolben druckseitig begrenzenden Förderraum. Zur Abdichtung des Pumpenkolbens auf der Niederdruckseite ist zwischen einer Buch¬ se und einer Stufenbohrung ein elastischer Dichtring unter axialer Vorspannung angeordnet, sodass eine durch die Gleit¬ bewegung des Pumpenkolbens initiierte Axialbewegung des Dichtrings sicher ausgeschlossen werden kann, um einen erhöhten Verschleiß des Dichtrings zu verhindern. Zwischen der Buchse und dem Dichtring befindet sich ferner ein Stützring sowie am Ende des Pumpengehäuses ein Führungsband für den Pumpenkolben, dem ein weiterer Stützring vorgeordnet ist, sodass der Dichtring beidseitig von Stützringen flankiert ist. Es befinden sich folglich im Bereich des Dichtrings die durch eine Feder beaufschlagte Buchse, die beiden Stützringe als auch das Führungsband, wodurch sich ein erheblicher Teileaufwand ergibt, der überdies die Baulänge der Pumpe ver¬ größert . Suction and pressure valve, and with the pump ¬ piston suction side limiting, designed as a follow-up space for the liquid annulus and the pump piston on the pressure side limiting delivery chamber. For sealing the pump piston on the low-pressure side, an elastic sealing ring is arranged under axial prestress between a bush ¬ se and a stepped bore, so that initiated by the sliding ¬ movement of the pump piston axial movement of the sealing ring can be safely excluded to prevent increased wear of the sealing ring , Also located between the sleeve and the sealing ring is a support ring and at the end of the pump housing a guide band for the pump piston, which is preceded by another support ring, so that the sealing ring is flanked on both sides by support rings. There are consequently in the region of the sealing ring acted upon by a spring bushing, the two support rings and the guide band, resulting in a considerable parts cost, which also ver ¬ the overall length of the pump ver ¬ enlarged.
Daher ist es die Aufgabe der vorliegenden Erfindung, eine Kolbenpumpe der angegebenen Art derart zu verbessern, dass weniger, möglichst kompakte Bauteile benötigt werden, sowie gleichzeitig eine verbesserte Abdichtung entlang der Mantel¬ fläche des Pumpenkolbens gewährleistet wird. Therefore, it is the object of the present invention, a Piston pump of the specified type to improve such that fewer, compact components are needed, and at the same time an improved seal along the shell ¬ surface of the pump piston is guaranteed.
Diese Aufgabe wird erfindungsgemäß für eine Kolbenpumpe der angegebenen Art mit den kennzeichnenden Merkmalen des Patentanspruchs 1 gelöst. This object is achieved for a piston pump of the type indicated with the characterizing features of claim 1.
Weitere Merkmale und Vorteile der Erfindung gehen im nach¬ folgenden aus der Beschreibung zweier Ausführungsbeispiele anhand von Zeichnungen hervor. Further features and advantages of the invention will become apparent in the following from the description of two embodiments with reference to drawings.
Es zeigen: Show it:
Fig. 1 im Längsschnitt an einem Pumpenkolben angeordnet die wesentlichen Führungs- und Abdichtelemente, bestehend aus einem auf Anschlag in das Pumpengehäuse einge- pressten Führungsband und einem davor im Pumpengehäu¬ se fixierten Dichtring, der getrennt durch einen Ringspalt von einem im Pumpengehäuse fixierten Stützring begrenzt ist, Fig. 1 in longitudinal section on a pump piston arranged the essential guiding and sealing elements, consisting of a pressed into abutment in the pump housing guide band and a previously fixed in Pumpengehäu ¬ se sealing ring which is delimited by an annular gap fixed by a support ring in the pump housing is
Fig. 2 abweichend von Figur 1 im Längsschnitt einen unmit¬ telbar auf Anschlag in das Pumpengehäuse eingepress- ten Dichtring mit einem davor angeordneten Führungsband, das durch eine Ringspalt vom Dichtring getrennt ist . Fig. 2 deviating from Figure 1 in longitudinal section a UNMIT ¬ telbar to stop in the pump housing eingepress- th sealing ring with a previously arranged guide band, which is separate from the sealing ring by an annular gap.
Die Figur 1 zeigt eine abschnittsweise Darstellung eine Kol¬ benpumpe in einem Längsschnitt, die bevorzugt zur Druckmit¬ telförderung in hydraulischen Bremsanlagen mit Schlupfregelung zum Einsatz gelangt. Das Pumpengehäuse 7 der Kolbenpumpe ist teilweise abgebildet und weist mehrere die Funktion der Kolbenpumpe bestimmenden Pumpenbauteile auf, wie ein in einem ringförmigen Führungsband 8 abschnittsweise geführtes Ende eines Pumpenkolbens 6, diametral zum Führungsband 8 ei¬ nen als Nachlaufraum 12 für die Flüssigkeit ausgeführten Ringraum sowie einen an der Mantelfläche des Pumpenkolbens 6 anliegenden elastischen Dichtring 1 zur leckagefreien Abdichtung des Kolbenendes in Richtung eines Kolbenantriebs¬ raum 13, der als Antrieb für den Pumpenkolben beispielhaft einen Exzenter mit einem Exzenterlager aufnimmt. Der Pumpenkolben 6 als auch der Nachlaufraum 12 sind gleichfalls nur jeweils in dem für die Erfindung relevanten Bereich gezeigt, sodass sich die aus Figur 1 erkennbaren Einzelheiten auf das Notwendige beschränken. 1 shows a sectional view of a Kol ¬ benpumpe in a longitudinal section, which is preferably used for Druckmit ¬ telförderung in hydraulic brake systems with slip control used. The pump housing 7 of the piston pump is partially shown and has several the function the piston pump-determining pump components, such as in a ring-shaped guide belt 8 sections guided end of a pump piston 6, diametrically to the guide belt 8 egg ¬ nen as a follow-up space 12 for the liquid running annulus and a voltage applied to the outer surface of the pump piston 6 elastic sealing ring 1 for leak-free sealing the piston end in the direction of a piston drive ¬ space 13, which receives as an example for the pump piston an eccentric with an eccentric bearing. The pump piston 6 and the follower space 12 are also shown only in the relevant area for the invention, so that the details recognizable from FIG. 1 are limited to what is necessary.
Der links des Pumpenkolbens 6 nicht dargestellte Bereich der Kolbenpumpe umfasst im Wesentlichen einen Förderraum, eine Kolbenrückstellfeder und ein Saug- und Druckventil mit den zugehörigen Saug- und Druckanschlüssen. The region of the piston pump not shown on the left of the pump piston 6 essentially comprises a delivery chamber, a piston return spring and a suction and pressure valve with the associated suction and pressure connections.
Damit während des Pumpenlaufs eine möglichst gleichbleibende leckagefreie Abdichtung des Pumpenkolbens 6 in Richtung des Kolbenantriebsraums 13 zustande kommt, sieht die Erfindung vor, dass der elastische Dichtring 1 mit einer axial gerichteten, ringförmig umlaufenden Nut 3 (sog. Ringnut) versehen ist, die somit seitlich eingesetzt ein Federelement 2 auf¬ nimmt, das die Dichtlippe des Dichtrings 1 auf den Pumpen¬ kolben 6 anpresst. Zur Erzeugung einer konstanten Anpresskraft des Dichtrings 1 auf die Mantelfläche des Pumpenkol¬ bens 6 ist das Federelement 2 als ein eine Radialkraft er¬ zeugendes Spreizelement ausgeführt. So that during the pumping run as constant as possible leak-free sealing of the pump piston 6 in the direction of the piston drive chamber 13 comes about, the invention provides that the elastic sealing ring 1 with an axially directed, annular circumferential groove 3 (so-called. Annular) is provided, thus the side used a spring element 2 takes on ¬ , which presses the sealing lip of the sealing ring 1 on the pump piston ¬ 6. To generate a constant contact pressure of the sealing ring 1 on the lateral surface of the Pumpenkol ¬ bens 6, the spring element 2 is designed as a radial force he ¬ generating expansion element.
Um die Funktionstüchtigkeit der Kolbenpumpe trocken, d.h. ohne Einsatz von Hydraulikflüssigkeit überprüfen zu können, ist der elastische Dichtring 1 aus einem Werkstoff mit zu Prüfzwecken hinreichend guten Trockenlaufeigenschaften hergestellt, wozu sich besonders Polytetrafluorethylen (PTFE) eignet . In order to check the functionality of the piston pump dry, ie without the use of hydraulic fluid, the elastic sealing ring 1 is made of a material with too Test purposes sufficiently good dry running properties produced, for which especially polytetrafluoroethylene (PTFE) is suitable.
Gemäß der Figur 1 ist der Dichtring 1 unmittelbar zwischen dem Führungsband 8 und einem in die Stufenbohrung 10 des Pumpengehäuses 7 eingepressten Stützring 4 fixiert, wobei vorteilhaft zwischen dem Stützring 4 und dem Dichtring 1 ein Ringspalt 5 zur ungehinderten Schmierung des Pumpenkolbens 6 und damit auch zur Schmierung der Dichtlippe des Dichtrings 1 mit dem von dem Pumpenkolben 6 über den Nachlaufraum 12 angesaugten Druckmittel vorgesehen ist. Zur Kolbenschmierung ist eine hydraulische Verbindung über einen zwischen dem Stützring 4 und dem Pumpenkolben 6 angeordneten Axialspalt 9 vorgesehen, der sich bis zum Ringspalt 5 erstreckt, sodass im Betrieb der Kolbenpumpe auf einfache, zuverlässige Weise über den Axialspalt 9 und den Ringspalt 5 eine Schmiermit¬ telverbindung vom Nachlaufraum 12 bis zum Dichtring 1 hergestellt ist. Als Schmiermittel dient hierbei die in hydrauli¬ schen Bremsanlagen üblicherweise verwendete sowie von der Kolbenpumpe geförderte Bremsflüssigkeit. According to Figure 1, the sealing ring 1 is fixed directly between the guide belt 8 and a pressed into the stepped bore 10 of the pump housing 7 support ring 4, wherein advantageously between the support ring 4 and the sealing ring 1 an annular gap 5 for unimpeded lubrication of the pump piston 6 and thus also Lubrication of the sealing lip of the sealing ring 1 is provided with the sucked by the pump piston 6 via the follow-up chamber 12 pressure medium. A hydraulic connection via an arranged between the support ring 4 and the pump piston 6 axial gap 9 is provided to the piston lubrication, which extends up to the annular gap 5 so that a simple, reliable manner via the axial gap 9 during operation of the piston pump and the annular gap 5 is a Schmiermit ¬ telverbindung of the follow-up space 12 to the sealing ring 1 is made. As a lubricant in this case commonly used in hydraulic devices ¬ rule braking systems and funded by the piston pump brake fluid is used.
Einen alternativen Lösungsvorschlag des eingangs erwähnten Problems ist aus der Figur 2 zu entnehmen, wonach nunmehr der Dichtring 1 unmittelbar zwischen einer an den Kolbenantriebsraum 13 angrenzenden Bohrungsstufe 11 im Pumpengehäuse 7 und dem in die Stufenbohrung 10 des Pumpengehäuses 7 ein¬ gepressten Führungsband 8 fixiert ist, der dem Nachlaufraum 12 zugewandt ist. Analog zu Figur 1 ist auch in Figur 2 zur Schmierung des Pumpenkolbens 6 im Bereich des Dichtrings 1 zwischen dem ringförmigen Führungsband 8 und dem Dichtring 1 ein Ringspalt 5 sowie zwischen dem Führungsband 8 und der Stufenbohrung 10 ein Axialspalt 9 angeordnet, der sich zum Ringspalt 5 erstreckt, wodurch eine Druckmittelverbindung zwischen dem im Betrieb der Kolbenpumpe mit Hydraulikflüs¬ sigkeit gefüllten Nachlaufraum 12 und dem vom Dichtring 1 umschlossenen Pumpenkolben 6 auf zuverlässige Weise herge¬ stellt ist. Der Axialspalt 9 ist in der einfachsten Ausführung als Längskerbe am Umfang des ringförmigen Führungsbandes 8 eingelassen. An alternative proposed solution of the above-mentioned problem can be seen from the figure 2, which is now the sealing ring 1 directly between a position adjacent to the piston drive chamber 13 bore step 11 in the pump housing 7 and a ¬ squeezed guide band 8 is fixed in the stepped bore 10 of the pump housing 7, which faces the follow-up space 12. Analogous to Figure 1, an axial gap 5 and between the guide belt 8 and the stepped bore 10, an axial gap 9 is also in Figure 2 for lubrication of the pump piston 6 in the region of the sealing ring 1 between the annular guide belt 8 and the sealing ring 1 arranged, the annular gap to the fifth extends, creating a pressure medium connection is Herge ¬ represents a reliable manner between the filled during operation of the piston pump with Hydraulikflüs ¬ sigkeit supply chamber 12 and the space enclosed by the sealing ring 1 pump piston. 6 The axial gap 9 is embedded in the simplest embodiment as a longitudinal notch on the circumference of the annular guide strip 8.
Analog zu Figur 1 ist auch im Ausführungsbeispiel nach Figur 2 die Nut 3 jeweils als seitlich in den Dichtring 1 einmündende sowie über die Seitenfläche des Dichtrings 3 umlaufen¬ de Ringnut ausgeführt, deren Nutöffnung dem Ringspalt 5 zu¬ gewandt ist, welcher vorteilhaft dem Betriebsmedium, in der Regel der zu fördernden Bremsflüssigkeit, ausgesetzt ist. Analogously to Figure 1, the groove 3 are each carried out in the embodiment of Figure 2 as the side opening into the sealing ring 1 and of the side surface of the seal ring 3 rotate ¬ de annular groove whose groove opening is the annular gap faces 5 to ¬, which is advantageously the operating medium, usually the to be pumped brake fluid is exposed.
Zusammenfassend ergibt sich somit auf der dem Kolbenan¬ triebsraum 13 zugewandten Niederdruckseite des Pumpenkolbens 6 eine besonders einfache, funktionssichere Kolbenführung sowie Kolbenabdichtung, die durch die beschriebene Ausbil¬ dung und Anordnung des Dichtrings 1, des Führungsbands 8 bzw. des Stützrings 4 folgende Vorteile aufweist: längere leckagefreie Pumpenlaufzeiten, In summary, therefore on the Kolbenan ¬ drive chamber 13 facing the low pressure side of the pump piston 6 a particularly simple, functionally reliable piston guide and piston seal having 4, the following advantages of the described Ausbil ¬ formation and arrangement of the sealing ring 1, the transfer belt 8 and the support ring: longer leakage-free pump running times,
bessere Dichtwirkung des Dichtrings 1 in allen Tempera¬ turbereichen, better sealing effect of the sealing ring 1 in all tempera ¬ turbereichen,
drastische Bauteilreduzierung,  drastic component reduction,
einfachere und kostengünstigere Bauteilmontage, kleinere axiale Toleranz des Einbauraums des Dichtele¬ ments 1 aufgrund der reduzierten Bauteilanzahl (wichtig für die Reduzierung des Pumpenverschleißes und die Ver¬ besserung des Pumpenwirkungsgrades) , simpler and less expensive component mounting, smaller axial tolerance of the installation space of the log message ¬ ments 1 due to the reduced number of components (important for the reduction in pump wear and the Ver ¬ improvement of the pumping efficiency),
Entfall der zusätzlichen Befettung/Ölbenetzung des Dichtelements 1 zum Zwecke der Trockenlauf-Pumpenprüfung . Bezugs zeichenliste Elimination of the additional lubrication / oil wetting of the sealing element 1 for the purpose of the dry-running pump test. Reference sign list
1 Dichtring 1 sealing ring
2 Federelement 2 spring element
3 Nut 3 groove
4 Stützring  4 support ring
5 Ringspalt  5 annular gap
6 Pumpenkolben 6 pump pistons
7 Pumpengehäuse7 pump housing
8 Führungsband8 leader band
9 Axialspalt 9 axial gap
10 Stufenbohrung 10 step drilling
11 Bohrungsstufe11 hole level
12 Nachlaufraum 12 follow-up room
13 Pumpenantriebsraum  13 pump drive space

Claims

Patentansprüche claims
1. Kolbenpumpe, insbesondere zur Druckmittelförderung in hydraulischen Bremsanlagen mit Schlupfregelung, mit einem Pumpengehäuse, das mehrere die Funktion der Kolben¬ pumpe bestimmende Pumpenbauteile wie einen in einem Führungsband abschnittsweise geführten Pumpenkolben, welches in das Pumpengehäuse eingepresst ist, einen den Pumpenkolben saugseitig begrenzenden, als Nachlaufraum für die Flüssigkeit ausgeführten Ringraum und mit einem den Pumpenkolben druckseitig begrenzenden Förderraum, sowie mit einem zwischen dem ringförmigen Führungsband und einer Stufenbohrung im Pumpengehäuse angeordneten elastischen Dichtring zur leckagefreien Abdichtung des Pumpenkolbens in Richtung eines im Pumpengehäuse ausge¬ bildeten Kolbenantriebsraums, dadurch gekennzeichnet, dass der elastische Dichtring (1) mit einer Nut (3) versehen ist, in der ein den Dichtring (1) auf den Pumpenkolben (6) anpressendes Federelement (2) eingesetzt ist . 1. Piston pump, in particular for conveying a pressure medium in hydraulic brake systems with slip control, with a pump housing, a plurality of the function of the piston ¬ pump determining pump components such as a partially guided in a guide band pump piston which is press-fitted into the pump housing, a suction side delimiting the pump piston, as Refill space for the liquid running annulus and with the pump piston on the pressure side limiting delivery chamber, and arranged between the annular guide band and a stepped bore in the pump housing elastic sealing ring for leak-free sealing of the pump piston in the direction of a ¬ in the pump housing ¬ formed piston drive chamber, characterized in that elastic sealing ring (1) is provided with a groove (3) in which a the sealing ring (1) on the pump piston (6) pressing spring element (2) is inserted.
2. Kolbenpumpe nach Anspruch 1, dadurch gekennzeichnet, dass der elastische Dichtring (1) aus einem Werkstoff mit uneingeschränkten Trockenlaufeigenschaften, insbesondere aus Polytetrafluorethylen (PTFE) hergestellt ist . 2. Piston pump according to claim 1, characterized in that the elastic sealing ring (1) is made of a material with unrestricted dry-running properties, in particular of polytetrafluoroethylene (PTFE).
3. Kolbenpumpe nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Dichtring (1) unmittelbar zwischen dem Führungsband (8) und einem in die Stufenbohrung (10) eingepressten Stützring (4) im Pumpengehäuse (7) fixiert ist, wobei zwischen dem Stützring (4) und dem Dichtring (1) ein Ringspalt (5) vorgesehen ist. 3. Piston pump according to claim 1 or 2, characterized in that the sealing ring (1) directly between the guide belt (8) and a in the stepped bore (10) pressed-support ring (4) is fixed in the pump housing (7), wherein between the support ring (4) and the sealing ring (1) an annular gap (5) is provided.
4. Kolbenpumpe nach Anspruch 3, dadurch gekennzeichnet, dass zwischen dem Stützring (4) und dem Pumpenkolben (6) ein Axialspalt (9) angeordnet ist, der sich zum Ringspalt (5) erstreckt, wodurch eine Druckmittelver¬ bindung zwischen dem Nachlaufräum (12) und dem Dichtring (1) hergestellt ist. 4. Piston pump according to claim 3, characterized in that between the support ring (4) and the pump piston (6) an axial gap (9) is arranged, which extends to the annular gap (5), whereby a Druckmittelver ¬ bond between the Nachlaufräum (12 ) and the sealing ring (1) is made.
5. Kolbenpumpe nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Dichtring (1) unmittelbar zwischen einer Bohrungsstufe (11) im Pumpengehäuse (7) und dem in die Stufenbohrung (10) eingepressten Führungsband (8) im Pumpengehäuse (7) fixiert ist, wobei zwischen dem Führungsband (8) und dem Dichtring (1) ein Ringspalt (5) vorgesehen ist. 5. Piston pump according to claim 1 or 2, characterized in that the sealing ring (1) directly between a bore stage (11) in the pump housing (7) and in the stepped bore (10) pressed guide strip (8) in the pump housing (7) is fixed , wherein between the guide belt (8) and the sealing ring (1) an annular gap (5) is provided.
6. Kolbenpumpe nach Anspruch 5, dadurch gekennzeichnet, dass zwischen dem Führungsband (8) und der Stufenbohrung (10) ein Axialspalt (9) angeordnet ist, der sich zum Ringspalt (5) erstreckt, wodurch eine Druckmittel¬ verbindung zwischen dem Nachlaufräum (12) und dem 6. Piston pump according to claim 5, characterized in that between the guide belt (8) and the stepped bore (10) an axial gap (9) is arranged, which extends to the annular gap (5), whereby a pressure medium ¬ connection between the Nachlaufräum (12 ) and the
Dichtring (1) hergestellt ist.  Sealing ring (1) is made.
7. Kolbenpumpe nach Anspruch 1, dadurch gekennzeichnet, dass zur Erzeugung einer konstanten Anpresskraft des Dichtrings (1) auf die Mantelfläche des Pumpenkolbens (6) das Federelement (2) als ein eine Radialkraft er¬ zeugendes Spreizelement ausgeführt ist. 7. Piston pump according to claim 1, characterized in that for generating a constant contact force of the sealing ring (1) on the lateral surface of the pump piston (6), the spring element (2) is designed as a radial force he- generating expansion element.
8. Kolbenpumpe nach Anspruch 1, dadurch gekennzeichnet, dass die Nut (3) als seitlich in den Dichtring (1) einmündende sowie über die Seitenfläche des Dichtrings (3) umlaufende Ringnut ausgeführt ist, deren Nutöffnung dem Ringspalt (5) zugewandt ist. 8. Piston pump according to claim 1, characterized in that the groove (3) as laterally in the sealing ring (1) opening and running over the side surface of the sealing ring (3) circumferential groove is executed, the groove opening facing the annular gap (5).
PCT/EP2012/062398 2011-08-02 2012-06-27 Piston pump WO2013017343A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN201280038103.6A CN103732916B (en) 2011-08-02 2012-06-27 Reciprocating pump
KR1020147002541A KR20140045519A (en) 2011-08-02 2012-06-27 Piston pump
US14/234,407 US20140178224A1 (en) 2011-08-02 2012-06-27 Piston pump
EP12729644.0A EP2739851A1 (en) 2011-08-02 2012-06-27 Piston pump

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102011080248.7 2011-08-02
DE102011080248 2011-08-02
DE102012203931.7 2012-03-14
DE102012203931A DE102012203931A1 (en) 2011-08-02 2012-03-14 piston pump

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US (1) US20140178224A1 (en)
EP (1) EP2739851A1 (en)
KR (1) KR20140045519A (en)
CN (1) CN103732916B (en)
DE (1) DE102012203931A1 (en)
WO (1) WO2013017343A1 (en)

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CN108291536A (en) * 2015-12-16 2018-07-17 安捷伦科技有限公司 With piston and for supporting piston with the fluid pump for the supporter being sealed
JP6658467B2 (en) * 2016-11-18 2020-03-04 株式会社アドヴィックス Piston pump
DE102017212490A1 (en) * 2017-07-20 2019-01-24 Robert Bosch Gmbh Piston pump, in particular high-pressure fuel pump for an internal combustion engine
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CN108087225A (en) * 2017-11-29 2018-05-29 重庆小优美网络科技有限公司 A kind of general plug balances super-silent gas liquid two purpose pump head
CN208605344U (en) * 2018-08-15 2019-03-15 浙江荣鹏气动工具有限公司 A kind of sealing structure of plunger pump
CN112855520B (en) * 2020-06-23 2022-04-22 江苏锡安达防爆股份有限公司 Double-cylinder pumping device with stroke controlled for viscous material
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CN103732916A (en) 2014-04-16
CN103732916B (en) 2016-02-03
DE102012203931A1 (en) 2013-02-07
EP2739851A1 (en) 2014-06-11
US20140178224A1 (en) 2014-06-26
KR20140045519A (en) 2014-04-16

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