EP2737208A1 - Piston pump for delivering fluids, and corresponding assembly process for a piston pump - Google Patents

Piston pump for delivering fluids, and corresponding assembly process for a piston pump

Info

Publication number
EP2737208A1
EP2737208A1 EP12724970.4A EP12724970A EP2737208A1 EP 2737208 A1 EP2737208 A1 EP 2737208A1 EP 12724970 A EP12724970 A EP 12724970A EP 2737208 A1 EP2737208 A1 EP 2737208A1
Authority
EP
European Patent Office
Prior art keywords
throttle element
piston pump
designed
cylinder
cover
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
Application number
EP12724970.4A
Other languages
German (de)
French (fr)
Other versions
EP2737208B1 (en
Inventor
Oliver Gaertner
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2737208A1 publication Critical patent/EP2737208A1/en
Application granted granted Critical
Publication of EP2737208B1 publication Critical patent/EP2737208B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F04B13/00—Pumps specially modified to deliver fixed or variable measured quantities
    • 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
    • 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
    • F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
    • F04B11/0008—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using accumulators
    • F04B11/0033—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using accumulators with a mechanical spring
    • 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
    • F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
    • F04B11/0091—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using a special shape of fluid pass, e.g. throttles, ducts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49236—Fluid pump or compressor making

Definitions

  • Piston pump for conveying fluids and corresponding assembly method for a piston pump
  • the invention relates to a piston pump for conveying fluids according to the preamble of independent claim 1.
  • the present invention relates to an assembly method for such a piston pump.
  • Piston pumps are known from the prior art in different embodiments.
  • radial piston pumps with a plurality of pump elements are frequently used to convey pressure means, in which at least one piston can be moved back and forth by means of an eccentric.
  • pump elements consist of a piston, often designed as a cylinder
  • Piston running surface, intake and exhaust valves and sealing elements serve to control the fluid during the pumping movement of the piston.
  • the inlet valve serves to prevent the fluid from flowing back into the suction space during the compression phase.
  • the outlet valve prevents backflow of the fluid from the pressure side into the pump interior and is typically located in the cover of the pump.
  • at least one throttle arrangement is provided for throttling the fluid flow downstream of the outlet valve.
  • a piston pump for brake pressure control in a hydraulic vehicle brake system comprises a pump housing, a receiving bore arranged in the pump housing for the piston pump and a valve cover which closes the intake pump to the outside and in which an outlet valve and first and second channel sections of a discharge channel are housed.
  • the Abströmgeometrie influences the noise behavior of the piston pump and is therefore usually carried out with a suitable taper of the outflow, which then represents a throttle effect.
  • the described piston pump for conveying fluids comprises a piston, a cylinder element and a pressure chamber arranged between an inlet valve and an outlet valve, which is closed off by a cover, wherein the outlet valve has a closing body embodied as a ball, a spiral spring acting on the closing body Biasing means comprising a base member for supporting the biasing means and a disc member, and wherein a sealing seat of the exhaust valve is disposed on the disc member.
  • Component tolerances of various components of the piston pump can not adversely affect the exhaust valve.
  • the sensor unit according to the invention for a vehicle with the features of independent claim 1 has the advantage that a cost neutral pre-centering of a designed as a resilient disc throttle element in a lid without obstructing the oscillatory movement of the
  • Throttle element is enabled during operation.
  • the core of the invention is a cost-neutral centering of the designed as a resilient disc throttle element.
  • the throttle element is introduced during assembly in the lid of the piston pump. Then the pump cylinder is pressed onto the lid. Although a centering of the throttle element is provided in the pump cylinder, but it can due to the fast
  • Throttle element in its movement does not restrict, because a mere The throttled throttle element prevents the piston pump from functioning and can lead to system failure if the drive is overloaded.
  • Embodiments of the present invention provide a piston pump for delivering fluids comprising a cylinder, a piston movably mounted in the cylinder, and a pressure space located between an inlet valve and an outlet valve, which is closed by a lid, wherein in the fluid flow after Exhaust valve, a throttle element is provided for throttling the fluid flow.
  • a throttle element is designed as a resilient disc, which is introduced into the lid, wherein means for pre-centering of the throttle element are present in the lid.
  • a piston pump which comprises a cylinder, a piston movably mounted in the cylinder, and a pressure chamber arranged between an inlet valve and an outlet valve, which is closed by a cover, wherein in the fluid flow downstream of the outlet valve is a throttle element is provided for throttling the fluid flow, the throttle element is designed as a resilient disc and introduced into the lid. This effect arranged in the lid
  • At least two press ribs are formed on the lid, on which the cylinder is pressed with the lid, wherein at least one recess formed between two press ribs as
  • the centering means comprise, for example, at least one chamfer, which is arranged in the pressing direction at the rear on such a pressing bar. In this area, advantageously, no obstructions due to the pressing in of the cylinder may occur. men. Furthermore, the chamfers can be implemented cost-neutral in the example designed as a cold-pressed lid.
  • the individual bevels each have an acute angle, which is preferably greater than 60 °. Due to the acute angle can be ensured in an advantageous manner that the throttle element is not stuck in operation on the chamfer or the centering.
  • an annular channel is formed in the lid, which is covered by the throttle element and filled with open outlet valve with fluid, which flows through the throttle element in at least one outflow channel.
  • designed as a resilient disc throttle element between the cylinder and the cover is arranged and sets the flow cross-section in the at least one outflow as a function of the pressure difference between its top and bottom variable.
  • the throttle element designed as a resilient disc can be arranged under a defined pretension between the cover and the cylinder, so that an opening difference pressure is predetermined.
  • the pressure difference lifts the throttle element designed as a resilient disk from the side with the higher pressure, so that the throttle element designed as a resilient disk performs a deformation movement along the axis of symmetry and increases the flow cross section.
  • the deformation movement of the throttle element designed as a resilient disc can be limited by a corresponding shaping of an end face of the cylinder.
  • the service life of the throttle element can be increased in an advantageous manner.
  • In the area of the stop can a fluidic cushioning to further optimize the opening and noise behavior.
  • the designed as a resilient disc throttle element has a flow-through first opening, wherein in a lifted position of the resilient disk designed as a throttle element, the first opening of the designed as a resilient disc throttle element flows through and / or designed as a resilient disc throttle element is flowed around.
  • an independent of the differential pressure released second opening with a defined constant flow cross section is present.
  • the second opening can for example be introduced as a bore in the designed as a resilient disc throttle element and / or as a recess in support and / or run as an annular gap.
  • the second orifice in the resilient disk designed as a resilient disk acts as an additional static throttle and allows a simple and inexpensive implementation of a dynamic throttle with a static component.
  • the advantage of such a design is that the positive functions of a dynamic throttle can be combined and integrated very cost-effectively and easy to install with a static throttle. It is an additional component that can be performed, for example, as a stamped part or as an etched component.
  • FIG. 1 shows a perspective sectional view of a rear portion of an embodiment of a piston pump according to the invention for conveying fluids.
  • Fig. 2 shows a detailed view of the piston pump according to the invention of Fig. 1 in a first state.
  • Fig. 3 shows a detailed view of the piston pump according to the invention of Fig. 1 in a second state.
  • FIG. 4 shows a perspective illustration of a throttle element for the piston pump from FIG. 1.
  • FIG. 5 shows a perspective view of a cylinder for the piston pump from FIG. 1.
  • FIG. 6 shows a perspective view of a cover for the piston pump from FIG. 1.
  • FIG. 7 shows a detailed perspective view of the cover for a piston pump from FIG. 6.
  • FIG. 8 shows a perspective view of the cover from FIG. 6 or 7 with the inserted throttle element from FIG. 4.
  • FIGS. 6 to 8 shows a detailed perspective view of a section of the cover for a piston pump from FIGS. 6 to 8 with a pressed-in cylinder.
  • the centering of the throttle element can be made for example by a small chamfer on the cylinder.
  • a coarse centering over the outer diameter of the throttle element on the cover is only possible to a limited extent, as due to the high pressure speeds of the cylinder in the cover may take place a deformation of the throttle element, if this is not correctly centered.
  • it must be prevented that the throttle element is present on one side and it may come to a possible terminals of the throttle element.
  • a clamping throttle element the buckling function of the dynamic throttle element is prevented and the high flow is prevented. This can u. This may lead to a complete failure of the system as the drive is overloaded.
  • the illustrated exemplary embodiment of a piston pump 1 for conveying fluids in a vehicle brake system comprises a piston (not shown), a cylinder 20 and a pressure chamber 24 arranged between an inlet valve and an outlet valve 5, not shown a lid 10 is completed, wherein in a fluid flow 3 after the outlet valve 5, a throttle element 30 is provided for throttling the fluid flow 3.
  • the outlet valve 5 comprises a closing body 5.1 designed as a ball, an outlet valve seat 5.2 and a return spring 5.3 and adjusts the fluid flow 3 between an outlet opening 26 of the pressure chamber 24 and at least one outflow channel 7 of the piston pump 1.
  • the throttle element 30 is designed as a resilient disc and clamped between the cover 10 and the cylinder.
  • the throttle element 30 designed as a resilient disk has a first opening 34, which is adapted to the dimension of the closing body 5.1.
  • the throttle element 30 designed as a resilient disk is clamped between a first support on the cylinder 20 and a second and third support arranged in the cover 10.
  • the designed as a resilient disc is clamped between a first support on the cylinder 20 and a second and third support arranged in the cover 10.
  • Throttle element 30 is disposed between the second support arranged in cover 10 against which the outer edge of the throttle element 30 designed as a resilient disk rests, and the third support arranged in cover 10, on which the inner edge of the throttle element 30 shown in FIG Rests on the region of the first opening 34, an offset dv1, which leads to a bias in the spring-elastic disc. led throttle element 30 leads, which must be applied by a prevailing fluid pressure to lift the outer edge of designed as a resilient disc throttle element 30 from the third support.
  • the inner edge of the designed as a resilient disc throttle element 30 is independent of the prevailing pressure both on the first cylinder element 20 arranged on the first support and arranged in the lid 10 second support on.
  • a deformation movement ds1 of the throttle element 30 designed as a resilient disk is limited by a corresponding shaping of an end face 22 of the cylinder 20.
  • the end face 22 is curved, wherein the dimensions of the curvature specify the maximum possible deformation movement of the designed as a resilient disc throttle element 30.
  • Fig. 2 shows the piston pump 1 at a differential pressure which is lower than a predetermined limit pressure value, so that the designed as a resilient disc throttle element abuts all supports and only the static throttle acts, so that a flowing fluid flow 3.1 through a bore as in the designed as a resilient disc throttle element 30 introduced second opening 36 is determined.
  • Centering means 18 present, which a pre-centering of the throttle element 30th cause in the lid 10.
  • six pressing webs 16 are formed in the lid 10, to which the cylinder 20 can be pressed with the lid 10. Between two pressing webs 16, a respective recess 17 is formed which, when the cylinder 20 is pressed in, acts as outflow channels 7 for the fluid flow 3.
  • the illustrated embodiment the
  • Cover 10 of the piston pump 1 six recesses 18 and the piston pump 1 thus six outflow 7 on.
  • the centering means 18 comprise at least one chamfer, which in each case lies in the pressing direction behind the pressing web
  • the centering means 18 comprise six chamfers. As can be seen from FIG. 9, the individual chamfers 18 each have an acute angle ⁇ , which is preferably greater than 60 °, in order to prevent jamming of the throttle element 30 designed as a resilient disk.
  • the throttle element 30 is designed as a resilient disc and introduced into the cover 10.
  • centering means 18 By arranged in the lid 10 centering means 18, a pre-centering of the throttle element 30 in the lid 10 is effected, and the
  • Cylinder element 20 can be pressed into the cover 10 after introduction and pre-centering of the throttle element 30, without deforming or damaging the throttle element 30 designed as a resilient disk.
  • second centering means 28 are provided, which are designed as adapted to the first opening 34 in the throttle element 30 circumferential collar and cause a final centering of the throttle element 30.
  • Embodiments of the present invention advantageously enable a cost-neutral pre-centering of the throttle element in the cover of the piston pump.

Abstract

The invention relates to a piston pump (1) for delivering fluids, which piston pump comprises a cylinder (20), a piston which is movably mounted in the cylinder (20), and a pressure chamber (24) which is arranged between an inlet valve and an outlet valve (5) and which is closed off by a cover (10), wherein in the fluid flow (3) downstream of the outlet valve (5) there is provided a throttle element (30) for throttling the fluid flow (3). According to the invention, the throttle element (30) is in the form of a resiliently elastic disk which is inserted into the cover (10), wherein means for pre-centering the throttle element (30) are provided in the cover (10).

Description

Beschreibung  description
Titel title
Kolbenpumpe zur Förderung von Fluiden und korrespondierendes Montageverfahren für eine Kolbenpumpe  Piston pump for conveying fluids and corresponding assembly method for a piston pump
Stand der Technik State of the art
Die Erfindung geht aus von einer Kolbenpumpe zur Förderung von Fluiden nach der Gattung des unabhängigen Patentanspruchs 1 . Zudem betrifft die vorliegende Erfindung ein Montageverfahren für eine solche Kolbenpumpe. The invention relates to a piston pump for conveying fluids according to the preamble of independent claim 1. In addition, the present invention relates to an assembly method for such a piston pump.
Kolbenpumpen sind aus dem Stand der Technik in unterschiedlichen Ausführungsformen bekannt. Beispielsweise werden in Fahrzeugbremsanlagen häufig Radialkolbenpumpen mit mehreren Pumpelementen zur Förderung von Druckmitteln verwendet, bei welchen wenigstens ein Kolben mittels eines Exzenters hin und her bewegt werden kann. Typischerweise bestehen diese sogenannten Pumpenelemente aus einem Kolben, einer häufig als Zylinder ausgebildeten Piston pumps are known from the prior art in different embodiments. For example, in vehicle brake systems, radial piston pumps with a plurality of pump elements are frequently used to convey pressure means, in which at least one piston can be moved back and forth by means of an eccentric. Typically, these so-called pump elements consist of a piston, often designed as a cylinder
Kolbenlauffläche, Einlass- und Auslassventilen sowie Dichtelementen. Die Ventile dienen der Fluidsteuerung bei der Pumpbewegung des Kolbens. Hierbei dient das Einlassventil dazu, das Fluid während der Verdichtungsphase nicht in den Ansaugraum zurückströmen zu lassen. Das Auslassventil verhindert die Rück- strömung des Fluides von der Druckseite in den Pumpeninnenraum und ist typischerweise im Deckel der Pumpe untergebracht. Zur Geräusch- und Pulsations- optimierung ist zum Drosseln der Fluidströmung nach dem Auslassventil mindestens eine Drosselanordnung vorgesehen. Piston running surface, intake and exhaust valves and sealing elements. The valves serve to control the fluid during the pumping movement of the piston. In this case, the inlet valve serves to prevent the fluid from flowing back into the suction space during the compression phase. The outlet valve prevents backflow of the fluid from the pressure side into the pump interior and is typically located in the cover of the pump. For noise and pulsation optimization, at least one throttle arrangement is provided for throttling the fluid flow downstream of the outlet valve.
In der Offenlegungsschrift DE 10 2008 002 740 A1 wird beispielsweise eine Kolbenpumpe zur Bremsdruckregelung in einer hydraulischen Fahrzeugbremsanlage beschrieben. Die beschriebene Kolbenpumpe umfasst ein Pumpengehäuse, eine im Pumpengehäuse angeordnete Aufnahmebohrung für die Kolbenpumpe und einen die Aufnahmepumpe nach außen verschließenden Ventildeckel, in welchem ein Auslass- ventil und erste und zweite Kanalabschnitte eines Abströmkanals untergebracht sind. Die Abströmgeometrie beeinflusst das Geräuschverhalten der Kolbenpumpe und wird deswegen meist mit einer geeigneten Verjüngung des Abströmkanals ausgeführt, welche dann eine Drosselwirkung darstellt. In the published patent application DE 10 2008 002 740 A1, for example, a piston pump for brake pressure control in a hydraulic vehicle brake system is described. The described piston pump comprises a pump housing, a receiving bore arranged in the pump housing for the piston pump and a valve cover which closes the intake pump to the outside and in which an outlet valve and first and second channel sections of a discharge channel are housed. The Abströmgeometrie influences the noise behavior of the piston pump and is therefore usually carried out with a suitable taper of the outflow, which then represents a throttle effect.
In der Offenlegungsschrift DE 10 2006 027 555 A1 wird beispielsweise eine Kolbenpumpe mit reduzierter Geräuschentwicklung beschrieben. Die beschriebene Kolbenpumpe zur Förderung von Fluiden umfasst einen Kolben, ein Zylinderelement und einen zwischen einem Einlassventil und einem Auslassventil angeord- neten Druckraum, welcher von einem Deckel abgeschlossen ist, wobei das Auslassventil einen als Kugel ausgeführten Schließkörper, eine auf den Schließkörper wirkende als Spiralfeder ausgeführte Vorspanneinrichtung, ein Basiselement zum Abstützen der Vorspanneinrichtung und ein Scheibenelement umfasst, und wobei ein Dichtsitz des Auslassventils am Scheibenelement angeordnet ist. In the published patent application DE 10 2006 027 555 A1, for example, a piston pump with reduced noise is described. The described piston pump for conveying fluids comprises a piston, a cylinder element and a pressure chamber arranged between an inlet valve and an outlet valve, which is closed off by a cover, wherein the outlet valve has a closing body embodied as a ball, a spiral spring acting on the closing body Biasing means comprising a base member for supporting the biasing means and a disc member, and wherein a sealing seat of the exhaust valve is disposed on the disc member.
Durch die Verwendung des Scheibenelements soll sichergestellt werden, dassThe use of the disc element is to ensure that
Bauteiltoleranzen verschiedener Bauteile der Kolbenpumpe sich nicht negativ auf das Auslassventil auswirken können. Component tolerances of various components of the piston pump can not adversely affect the exhaust valve.
Offenbarung der Erfindung Disclosure of the invention
Die erfindungsgemäße Sensoreinheit für ein Fahrzeug mit den Merkmalen des unabhängigen Patentanspruchs 1 hat demgegenüber den Vorteil, dass eine kostenneutrale Vorzentrierung eines als federelastische Scheibe ausgeführten Drosselelements in einem Deckel ohne Behinderung der Schwingbewegung des The sensor unit according to the invention for a vehicle with the features of independent claim 1 has the advantage that a cost neutral pre-centering of a designed as a resilient disc throttle element in a lid without obstructing the oscillatory movement of the
Drosselelements im Betrieb ermöglicht wird. Throttle element is enabled during operation.
Der Kern der Erfindung ist eine kostenneutrale Zentrierung des als federelastische Scheibe ausgeführten Drosselelements. Das Drosselelement wird bei der Montage in den Deckel der Kolbenpumpe eingebracht. Danach wird der Pum- penzylinder auf den Deckel gepresst. Im Pumpenzylinder ist zwar eine Zentrierung des Drosselelements vorgesehen, es kann aber aufgrund der schnellen The core of the invention is a cost-neutral centering of the designed as a resilient disc throttle element. The throttle element is introduced during assembly in the lid of the piston pump. Then the pump cylinder is pressed onto the lid. Although a centering of the throttle element is provided in the pump cylinder, but it can due to the fast
Montage zu einer Verformung eines nicht ausreichend vorzentrierten Drosselelements kommen. Daher ist es sinnvoll das Drosselelement vor Montage des Pumpenzylinders im Deckel vorzuzentrieren. Diese Vorzentrierung darf das Assembly to a deformation of a not sufficiently pre-centered throttle element come. Therefore, it is useful vorzuzentrieren the throttle element before mounting the pump cylinder in the lid. This pre-centering allows the
Drosselelement in seiner Bewegung allerdings nicht einschränken, denn ein blo- ckiertes Drosselelement verhindert die Funktion der Kolbenpumpe und kann durch eine Überlastung eines Antriebs zu einem Ausfall des Systems führen. Throttle element in its movement, however, does not restrict, because a mere The throttled throttle element prevents the piston pump from functioning and can lead to system failure if the drive is overloaded.
Ausführungsformen der vorliegenden Erfindung stellen eine Kolbenpumpe zur Förderung von Fluiden zur Verfügung, welche einen Zylinder, einen im Zylinder beweglich gelagerten Kolben, und einen zwischen einem Einlassventil und einem Auslassventil angeordneten Druckraum umfasst, welcher von einem Deckel abgeschlossen ist, wobei in der Fluidströmung nach dem Auslassventil ein Drosselelement zum Drosseln der Fluidströmung vorgesehen ist. Erfindungsgemäß ist das Drosselelement als federelastische Scheibe ausgeführt, welche in den Deckel eingebracht ist, wobei im Deckel Mittel zur Vorzentrierung des Drosselelements vorhanden sind. Embodiments of the present invention provide a piston pump for delivering fluids comprising a cylinder, a piston movably mounted in the cylinder, and a pressure space located between an inlet valve and an outlet valve, which is closed by a lid, wherein in the fluid flow after Exhaust valve, a throttle element is provided for throttling the fluid flow. According to the throttle element is designed as a resilient disc, which is introduced into the lid, wherein means for pre-centering of the throttle element are present in the lid.
Bei einem erfindungsgemäßen Verfahren zur Montage einer Kolbenpumpe, wel- che einen Zylinder, einen im Zylinder beweglich gelagerten Kolben, und einen zwischen einem Einlassventil und einem Auslassventil angeordneten Druckraum umfasst, welcher von einem Deckel abgeschlossen ist, wobei in der Fluidströmung nach dem Auslassventil ein Drosselelement zum Drosseln der Fluidströmung vorgesehen ist, wird das Drosselelement als federelastische Scheibe aus- geführt und in den Deckel eingebracht. Hierbei bewirken im Deckel angeordneteIn a method according to the invention for assembling a piston pump, which comprises a cylinder, a piston movably mounted in the cylinder, and a pressure chamber arranged between an inlet valve and an outlet valve, which is closed by a cover, wherein in the fluid flow downstream of the outlet valve is a throttle element is provided for throttling the fluid flow, the throttle element is designed as a resilient disc and introduced into the lid. This effect arranged in the lid
Zentriermittel eine Vorzentrierung des Drosselelements im Deckel und das Zylinderelement wird nach dem Einbringen und der Vorzentrierung des Drosselelements in den Deckel eingepresst. Durch die in den abhängigen Ansprüchen aufgeführten Maßnahmen und Weiterbildungen sind vorteilhafte Verbesserungen der im unabhängigen Patentanspruch 1 angegebenen Kolbenpumpe möglich. Centering a pre-centering of the throttle element in the lid and the cylinder element is pressed after the introduction and pre-centering of the throttle element in the lid. The measures and refinements recited in the dependent claims advantageous improvements of the independent claim 1 piston pump are possible.
Besonders vorteilhaft ist, dass am Deckel mindestens zwei Pressstege ausgebil- det sind, an welchen der Zylinder mit dem Deckel verpresst ist, wobei mindestens eine zwischen zwei Pressstegen ausgebildete Aussparung als It is particularly advantageous that at least two press ribs are formed on the lid, on which the cylinder is pressed with the lid, wherein at least one recess formed between two press ribs as
Abströmkanal für die Fluidströmung wirkt. Die Zentriermittel umfassen beispielsweise mindestens eine Fase, welche in Anpressrichtung hintenliegend an einem solchen Presssteg angeordnet ist. In diesem Bereich kann es in vorteilhafter Weise zu keinen Behinderungen aufgrund des Einpressens des Zylinders kom- men. Des Weiteren können die Fasen kostenneutral in dem beispielsweise als Kaltschlagteil ausgeführten Deckel umgesetzt werden. Outflow channel for the fluid flow acts. The centering means comprise, for example, at least one chamfer, which is arranged in the pressing direction at the rear on such a pressing bar. In this area, advantageously, no obstructions due to the pressing in of the cylinder may occur. men. Furthermore, the chamfers can be implemented cost-neutral in the example designed as a cold-pressed lid.
In vorteilhafter Ausgestaltung der erfindungsgemäßen Kolbenpumpe weisen die einzelnen Fasen jeweils einen spitzen Winkel auf, welcher vorzugsweise größer als 60° ist. Aufgrund des spitzen Winkels kann in vorteilhafter Weise sichergestellt werden, dass das Drosselelement im Betrieb nicht an der Fase bzw. den Zentriermitteln klemmt. In weiterer vorteilhafter Ausgestaltung der erfindungsgemäßen Kolbenpumpe ist im Deckel ein Ringkanal ausgebildet, welcher vom Drosselelement abgedeckt und bei geöffnetem Auslassventil mit Fluid gefüllt ist, welches über das Drosselelement in mindestens einen Abströmkanal abfließt. In weiterer vorteilhafter Ausgestaltung der erfindungsgemäßen Kolbenpumpe ist das als federelastische Scheibe ausgeführte Drosselelement zwischen dem Zylinder und dem Deckel angeordnet und stellt den Strömungsquerschnitt in dem mindestens einen Abströmkanal in Abhängigkeit von der Druckdifferenz zwischen seiner Oberseite und der Unterseite variabel ein. Durch diesen variablen Drosselquerschnitt kann mit einfachen und kostengünstigen Bauteilen, welche prozesssicher zu montieren sind, eine Reduktion von Pulsationen in einem Fluid- system und ein robustes Design erzielt werden. Das als federelastische Scheibe ausgeführte Drosselelement kann unter einer definierten Vorspannung zwischen dem Deckel und dem Zylinder angeordnet werden, so dass ein Öffnungsdiffe- renzdruck vorgegeben ist. Die Druckdifferenz hebt das als federelastische Scheibe ausgeführte Drosselelement von der Seite mit dem höheren Druck ab, so dass das als federelastische Scheibe ausgeführte Drosselelement entlang der Symmetrieachse eine Deformationsbewegung ausführt und den Strömungsquerschnitt vergrößert. In an advantageous embodiment of the piston pump according to the invention, the individual bevels each have an acute angle, which is preferably greater than 60 °. Due to the acute angle can be ensured in an advantageous manner that the throttle element is not stuck in operation on the chamfer or the centering. In a further advantageous embodiment of the piston pump according to the invention an annular channel is formed in the lid, which is covered by the throttle element and filled with open outlet valve with fluid, which flows through the throttle element in at least one outflow channel. In a further advantageous embodiment of the piston pump according to the invention designed as a resilient disc throttle element between the cylinder and the cover is arranged and sets the flow cross-section in the at least one outflow as a function of the pressure difference between its top and bottom variable. By means of this variable throttle cross-section, it is possible to achieve a reduction of pulsations in a fluid system and a robust design with simple and cost-effective components which can be reliably mounted. The throttle element designed as a resilient disc can be arranged under a defined pretension between the cover and the cylinder, so that an opening difference pressure is predetermined. The pressure difference lifts the throttle element designed as a resilient disk from the side with the higher pressure, so that the throttle element designed as a resilient disk performs a deformation movement along the axis of symmetry and increases the flow cross section.
In weiterer vorteilhafter Ausgestaltung der erfindungsgemäßen Kolbenpumpe kann die Deformationsbewegung des als federelastische Scheibe ausgeführten Drosselelements durch eine entsprechende Formgebung einer Stirnfläche des Zylinders begrenzt werden. Dadurch kann in vorteilhafter Weise die Lebensdauer des Drosselelements gesteigert werden. Im Bereich des Anschlags kann eine fluidische Endlagendämpfung das Öffnungs- und Geräuschverhalten weiter optimieren. In a further advantageous embodiment of the piston pump according to the invention, the deformation movement of the throttle element designed as a resilient disc can be limited by a corresponding shaping of an end face of the cylinder. As a result, the service life of the throttle element can be increased in an advantageous manner. In the area of the stop can a fluidic cushioning to further optimize the opening and noise behavior.
Besonders vorteilhaft ist, dass das als federelastische Scheibe ausgeführte Drosselelement eine durchströmbare erste Öffnung aufweist, wobei bei einer abgehobenen Stellung des als federelastische Scheibe ausgeführten Drosselelements die erste Öffnung des als federelastische Scheibe ausgeführten Drosselelements durchströmt und/oder das als federelastische Scheibe ausgeführte Drosselelement umströmt ist. It is particularly advantageous that the designed as a resilient disc throttle element has a flow-through first opening, wherein in a lifted position of the resilient disk designed as a throttle element, the first opening of the designed as a resilient disc throttle element flows through and / or designed as a resilient disc throttle element is flowed around.
In weiterer vorteilhafter Ausgestaltung der erfindungsgemäßen Kolbenpumpe ist eine unabhängig vom Differenzdruck freigegebene zweite Öffnung mit einem definierten konstanten Strömungsquerschnitt vorhanden. Die zweite Öffnung kann beispielsweise als Bohrung in das als federelastische Scheibe ausgeführte Drosselelement und/oder als Vertiefung in Auflager eingebracht und/oder als Ringspalt ausgeführt werden. Die zweite Öffnung im als federelastische Scheibe ausgeführten Drosselelement wirkt als zusätzliche statische Drossel und ermöglicht eine einfache und kostengünstige Implementierung einer dynamischen Drossel mit einem statischen Anteil. Der Vorteil einer solchen Konstruktion liegt darin, dass die positiven Funktionen einer dynamischen Drossel sehr kostengünstig und montagefreundlich mit einer statischen Drossel kombiniert und integriert werden können. Es handelt sich um ein zusätzliches Bauteil, das beispielsweise als Stanzteil oder als geätztes Bauteil ausgeführt werden kann. Wenn eine bestimmte Druckdifferenz erreicht wird, biegt sich das als federelastische Scheibe ausgeführte Drosselelement durch und die dynamische Drossel öffnet, so dass zusätzlich eine große Fluidmenge abströmen kann. Unterhalb der vorgegebenen Druckdifferenz strömt eine kleinere Fluidmenge über die statische Drossel, d.h. In a further advantageous embodiment of the piston pump according to the invention, an independent of the differential pressure released second opening with a defined constant flow cross section is present. The second opening can for example be introduced as a bore in the designed as a resilient disc throttle element and / or as a recess in support and / or run as an annular gap. The second orifice in the resilient disk designed as a resilient disk acts as an additional static throttle and allows a simple and inexpensive implementation of a dynamic throttle with a static component. The advantage of such a design is that the positive functions of a dynamic throttle can be combined and integrated very cost-effectively and easy to install with a static throttle. It is an additional component that can be performed, for example, as a stamped part or as an etched component. When a certain pressure difference is reached, the designed as a resilient disc throttle element bends through and the dynamic throttle opens, so that in addition a large amount of fluid can flow. Below the predetermined pressure difference, a smaller amount of fluid flows across the static throttle, i.
durch die zweite Öffnung ab. through the second opening.
Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen dargestellt und wird in der nachfolgenden Beschreibung näher erläutert. In den Zeichnungen bezeichnen gleiche Bezugszeichen Komponenten bzw. Elemente, die gleiche bzw. analoge Funktionen ausführen. An embodiment of the invention is illustrated in the drawings and will be explained in more detail in the following description. In the drawings, like reference numerals designate components that perform the same or analog functions.
Kurze Beschreibung der Zeichnungen Fig. 1 zeigt eine perspektivische Schnittdarstellung eines hinteren Bereichs eines Ausführungsbeispiels einer erfindungsgemäßen Kolbenpumpe zur Förderung von Fluiden. Brief description of the drawings Fig. 1 shows a perspective sectional view of a rear portion of an embodiment of a piston pump according to the invention for conveying fluids.
Fig. 2 zeigt eine Detaildarstellung der erfindungsgemäßen Kolbenpumpe aus Fig. 1 in einem ersten Zustand. Fig. 2 shows a detailed view of the piston pump according to the invention of Fig. 1 in a first state.
Fig. 3 zeigt eine Detaildarstellung der erfindungsgemäßen Kolbenpumpe aus Fig. 1 in einem zweiten Zustand. Fig. 3 shows a detailed view of the piston pump according to the invention of Fig. 1 in a second state.
Fig. 4 zeigte eine perspektivische Darstellung eines Drosselelements für die Kolbenpumpe aus Fig. 1. FIG. 4 shows a perspective illustration of a throttle element for the piston pump from FIG. 1.
Fig. 5 zeigte eine perspektivische Darstellung eines Zylinders für die Kolbenpumpe aus Fig. 1 . FIG. 5 shows a perspective view of a cylinder for the piston pump from FIG. 1.
Fig. 6 zeigte eine perspektivische Darstellung eines Deckels für die Kolbenpumpe aus Fig. 1 . FIG. 6 shows a perspective view of a cover for the piston pump from FIG. 1.
Fig. 7 zeigt eine perspektivische Detaildarstellung des Deckels für eine Kolbenpumpe aus Fig. 6. 7 shows a detailed perspective view of the cover for a piston pump from FIG. 6.
Fig. 8 zeigte eine perspektivische Darstellung des Deckels aus Fig. 6 oder 7 mit dem eingelegten Drosselelement aus Fig. 4. FIG. 8 shows a perspective view of the cover from FIG. 6 or 7 with the inserted throttle element from FIG. 4.
Fig. 9 zeigt eine perspektivische Detaildarstellung eines Ausschnitts des Deckels für eine Kolbenpumpe aus Fig. 6 bis 8 mit einem eingepressten Zylinder. 9 shows a detailed perspective view of a section of the cover for a piston pump from FIGS. 6 to 8 with a pressed-in cylinder.
Ausführungsformen der Erfindung Embodiments of the invention
Bei der Integration einer dynamischen Drossel in eine Kolbenpumpe, die beispielsweise in einem Antiblockiersystem (ABS) und/oder für ein elektronisches Stabilitätsprogramm im Fahrzeug eingesetzt wird, kann die Zentrierung des Drosselelements beispielsweise durch eine kleine Fase am Zylinder vorgenommen werden. Eine Grobzentrierung über den Außendurchmesser des Drosselelements am Deckel ist nur bedingt möglich, da aufgrund der hohen Einpressge- schwindigkeiten des Zylinders in den Deckel eine Verformung des Drosselelements stattfinden kann, wenn diese nicht korrekt zentriert ist. Außerdem muss verhindert werden, dass das Drosselelement einseitig anliegt und es so zu einem evtl. Klemmen des Drosselelements kommen kann. Durch ein klemmendes Drosselelement wird die Knickfunktion des dynamischen Drosselelements verhindert und der hohe Durchfluss wird verhindert. Dies kann u. U. zu einem Komplettausfall des Systems führen, da der Antrieb überlastet wird. When integrating a dynamic throttle in a piston pump, which is used for example in an antilock braking system (ABS) and / or for an electronic stability program in the vehicle, the centering of the throttle element can be made for example by a small chamfer on the cylinder. A coarse centering over the outer diameter of the throttle element on the cover is only possible to a limited extent, as due to the high pressure speeds of the cylinder in the cover may take place a deformation of the throttle element, if this is not correctly centered. In addition, it must be prevented that the throttle element is present on one side and it may come to a possible terminals of the throttle element. By a clamping throttle element, the buckling function of the dynamic throttle element is prevented and the high flow is prevented. This can u. This may lead to a complete failure of the system as the drive is overloaded.
Wie aus Fig. 1 bis 9 ersichtlich ist, umfasst das dargestellte Ausführungsbeispiel einer erfindungsgemäßen Kolbenpumpe 1 zur Förderung von Fluiden in einem Fahrzeugbremssystem einen nicht dargestellten Kolben, einen Zylinder 20 und einen zwischen einem nicht dargestellten Einlassventil und einem Auslassventil 5 angeordneten Druckraum 24, welcher von einem Deckel 10 abgeschlossen ist, wobei in einer Fluidströmung 3 nach dem Auslassventil 5 ein Drosselelement 30 zur Drosselung der Fluidströmung 3 vorgesehen ist. As can be seen from FIGS. 1 to 9, the illustrated exemplary embodiment of a piston pump 1 according to the invention for conveying fluids in a vehicle brake system comprises a piston (not shown), a cylinder 20 and a pressure chamber 24 arranged between an inlet valve and an outlet valve 5, not shown a lid 10 is completed, wherein in a fluid flow 3 after the outlet valve 5, a throttle element 30 is provided for throttling the fluid flow 3.
Wie aus Fig. 1 weiter ersichtlich ist, umfasst das Auslassventil 5 einen als Kugel ausgeführten Schließkörper 5.1 , einen Auslassventilsitz 5.2 sowie eine Rückstellfeder 5.3 und stellt die Fluidströmung 3 zwischen einer Auslassöffnung 26 des Druckraums 24 und mindestens einem Abströmkanal 7 der Kolbenpumpe 1 ein. Das Drosselelement 30 ist als federelastische Scheibe ausgeführt und zwischen dem Deckel 10 und dem Zylinder eingespannt. Im dargestellten Ausführungsbeispiel weist das als federelastische Scheibe ausgeführte Drosselelement 30 eine erste Öffnung 34 auf, welche an die Abmessung des Schließkörpers 5.1 ange- passt ist. As is further apparent from FIG. 1, the outlet valve 5 comprises a closing body 5.1 designed as a ball, an outlet valve seat 5.2 and a return spring 5.3 and adjusts the fluid flow 3 between an outlet opening 26 of the pressure chamber 24 and at least one outflow channel 7 of the piston pump 1. The throttle element 30 is designed as a resilient disc and clamped between the cover 10 and the cylinder. In the illustrated embodiment, the throttle element 30 designed as a resilient disk has a first opening 34, which is adapted to the dimension of the closing body 5.1.
Wie aus Fig.1 bis 5 weiter ersichtlich ist, ist das als federelastische Scheibe ausgeführte Drosselelement 30 zwischen einem ersten Auflager am Zylinder 20 und einem zweiten und dritten im Deckel 10 angeordneten Auflager eingespannt. Zur Einstellung der Vorspannung des als federelastische Scheibe ausgeführtenAs can also be seen from FIGS. 1 to 5, the throttle element 30 designed as a resilient disk is clamped between a first support on the cylinder 20 and a second and third support arranged in the cover 10. For adjusting the preload of the designed as a resilient disc
Drosselelements 30 besteht zwischen dem im Deckel 10 angeordneten zweiten Auflager, an welchem der äußere Rand des als federelastische Scheibe ausgeführten Drosselelements 30 aufliegt, und dem im Deckel 10 angeordneten dritten Auflager, an welchem der innere Rand des als federelastische Scheibe ausge- führten Drosselelements 30 im Bereich der ersten Öffnung 34 aufliegt, ein Versatz dv1 , welcher zu einer Vorspannung im als federelastische Scheibe ausge- führten Drosselelement 30 führt, welche von einem herrschenden Fluiddruck aufgebracht werden muss, um den äußeren Rand des als federelastische Scheibe ausgeführtes Drosselelements 30 vom dritten Auflager abzuheben. Hierbei liegt der innere Rand des als federelastische Scheibe ausgeführtes Drosselelements 30 unabhängig vom herrschenden Druck sowohl am ersten am Zylinderelement 20 angeordneten ersten Auflager und dem im Deckel 10 angeordneten zweiten Auflager auf. Throttle element 30 is disposed between the second support arranged in cover 10 against which the outer edge of the throttle element 30 designed as a resilient disk rests, and the third support arranged in cover 10, on which the inner edge of the throttle element 30 shown in FIG Rests on the region of the first opening 34, an offset dv1, which leads to a bias in the spring-elastic disc. led throttle element 30 leads, which must be applied by a prevailing fluid pressure to lift the outer edge of designed as a resilient disc throttle element 30 from the third support. Here, the inner edge of the designed as a resilient disc throttle element 30 is independent of the prevailing pressure both on the first cylinder element 20 arranged on the first support and arranged in the lid 10 second support on.
Wie aus Fig. 1 bis 5 weiter ersichtlich ist, ist eine Deformationsbewegung ds1 des als federelastische Scheibe ausgeführten Drosselelements 30 durch eine entsprechende Formgebung einer Stirnfläche 22 des Zylinders 20 begrenzt. Im dargestellten Ausführungsbeispiel ist die Stirnfläche 22 gewölbt ausgeführt, wobei die Abmessungen der Wölbung die maximal mögliche Deformationsbewegung des als federelastische Scheibe ausgeführtes Drosselelements 30 vorgeben. Fig. 2 zeigt die Kolbenpumpe 1 bei einem Differenzdruck, der niedriger als ein vorgegebenen Grenzdruckwert ist, so dass das als federelastische Scheibe ausgeführte Drosselelement an allen Auflagern anliegt und nur die statische Drossel wirkt, so dass ein abfließender Fluidstrom 3.1 durch eine als Bohrung in das als federelastische Scheibe ausgeführte Drosselelement 30 eingebrachte zweite Öffnung 36 bestimmt wird. Fig. 3 zeigt die Kolbenpumpe 1 bei einem Differenzdruck, der höher als der vorgegebene Grenzdruckwert ist, so dass der äußere Rand des als federelastische Scheibe ausgeführten Drosselelements 30 vom dritten Auflager abgehoben ist und nur noch der innere Rand des als federelastische Scheibe ausgeführten Drosselelements am ersten und zweiten Auflager anliegt. In diesem Zustand wirkt die dynamische Drossel, so dass das als federelastische Scheibe ausgeführte Drosselelement von einem weiteren Fluidstrom 3.2 umströmt wird, welcher mit dem durch die zweite Öffnung 36 fließenden Fluidstrom 3.1 einen abfließenden Gesamtfluidstrom 3 bildet. Im Deckel 10 ist ein Ringkanal 12 ausgebildet, welcher vom Drosselelement 30 abgedeckt ist. Das Fluid gelangt bei geöffnetem Auslassventil 5, d.h. bei aus dem Auslassventilsitz 5.2 abgehobenem Schließkörper 5.1 , über einen Verbindungskanal 14 in den Ringkanal 58 und fließt über das Drosselelement 30 in mindestens einen Abströmkanal 7 ab. Wie aus Fig. 6 bis 9 weiter ersichtlich ist, sind im Deckel 10 erfindungsgemäßAs is further apparent from FIGS. 1 to 5, a deformation movement ds1 of the throttle element 30 designed as a resilient disk is limited by a corresponding shaping of an end face 22 of the cylinder 20. In the illustrated embodiment, the end face 22 is curved, wherein the dimensions of the curvature specify the maximum possible deformation movement of the designed as a resilient disc throttle element 30. Fig. 2 shows the piston pump 1 at a differential pressure which is lower than a predetermined limit pressure value, so that the designed as a resilient disc throttle element abuts all supports and only the static throttle acts, so that a flowing fluid flow 3.1 through a bore as in the designed as a resilient disc throttle element 30 introduced second opening 36 is determined. Fig. 3 shows the piston pump 1 at a differential pressure which is higher than the predetermined limit pressure value, so that the outer edge of the designed as a resilient disc throttle element 30 is lifted from the third support and only the inner edge of the designed as a resilient disc throttle element on the first and second support is applied. In this state, the dynamic throttle acts, so that the throttle element designed as a resilient disc is flowed around by a further fluid stream 3.2, which forms with the flowing through the second opening 36 fluid flow 3.1 a outflowing total fluid flow 3. In the cover 10, an annular channel 12 is formed, which is covered by the throttle element 30. The fluid passes with the exhaust valve 5 open, i. when lifted from the outlet valve seat 5.2 closing body 5.1, via a connecting channel 14 into the annular channel 58 and flows through the throttle element 30 in at least one outflow channel 7 from. As is further apparent from FIGS. 6 to 9, the cover 10 is in accordance with the invention
Zentriermittel 18 vorhanden, welche eine Vorzentrierung des Drosselelements 30 im Deckel 10 bewirken. Im dargestellten Ausführungsbeispiel sind im Deckel 10 sechs Pressstege 16 ausgebildet, an welchen der Zylinder 20 mit dem Deckel 10 verpresst werden kann. Zwischen zwei Pressstegen 16 ist jeweils eine Aussparung 17 ausgebildet, welche bei eingepresstem Zylinder 20 als Abströmkanäle 7 für die Fluidströmung 3 wirken. Im dargestellten Ausführungsbeispiel weist derCentering means 18 present, which a pre-centering of the throttle element 30th cause in the lid 10. In the illustrated embodiment, six pressing webs 16 are formed in the lid 10, to which the cylinder 20 can be pressed with the lid 10. Between two pressing webs 16, a respective recess 17 is formed which, when the cylinder 20 is pressed in, acts as outflow channels 7 for the fluid flow 3. In the illustrated embodiment, the
Deckel 10 der Kolbenpumpe 1 sechs Aussparungen 18 und die Kolbenpumpe 1 somit sechs Abströmkanäle 7 auf. Cover 10 of the piston pump 1 six recesses 18 and the piston pump 1 thus six outflow 7 on.
Wie aus Fig. 6 bis 9 weiter ersichtlich ist, umfassen die Zentriermittel 18 mindes- tens eine Fase, welche jeweils in Anpressrichtung hintenliegend am PressstegAs can also be seen from FIGS. 6 to 9, the centering means 18 comprise at least one chamfer, which in each case lies in the pressing direction behind the pressing web
16 angeordnet ist. Im dargestellten Ausführungsbeispiel umfassen die Zentriermittel 18 sechs Fasen. Wie aus Fig. 9 ersichtlich ist, weisen die einzelnen Fasen 18 jeweils einen spitzen Winkel α auf, der vorzugsweise größer als 60° ist, um ein Verklemmen des als federelastische Scheibe ausgeführten Drosselelements 30 zu verhindern. 16 is arranged. In the illustrated embodiment, the centering means 18 comprise six chamfers. As can be seen from FIG. 9, the individual chamfers 18 each have an acute angle α, which is preferably greater than 60 °, in order to prevent jamming of the throttle element 30 designed as a resilient disk.
Gemäß dem erfindungsgemäßen Verfahren zur Montage einer Kolbenpumpe, wird das Drosselelement 30 als federelastische Scheibe ausgeführt und in den Deckel 10 eingebracht. Durch die im Deckel 10 angeordneten Zentriermittel 18 wird eine Vorzentrierung des Drosselelements 30 im Deckel 10 bewirkt, und dasAccording to the inventive method for mounting a piston pump, the throttle element 30 is designed as a resilient disc and introduced into the cover 10. By arranged in the lid 10 centering means 18, a pre-centering of the throttle element 30 in the lid 10 is effected, and the
Zylinderelement 20 kann nach dem Einbringen und der Vorzentrierung des Drosselelements 30 in den Deckel 10 eingepresst werden, ohne das als federelastische Scheibe ausgeführte Drosselelement 30 zu verformen bzw. zu beschädigen. An der Auslassöffnung 26 des Zylinders 20 sind zweite Zentriermittel 28 vorgesehen, die als an die erste Öffnung 34 im Drosselelement 30 angepasster umlaufender Kragen ausgeführt sind und eine abschließenden Zentrierung des Drosselelements 30 bewirken. Cylinder element 20 can be pressed into the cover 10 after introduction and pre-centering of the throttle element 30, without deforming or damaging the throttle element 30 designed as a resilient disk. At the outlet opening 26 of the cylinder 20 second centering means 28 are provided, which are designed as adapted to the first opening 34 in the throttle element 30 circumferential collar and cause a final centering of the throttle element 30.
Ausführungsformen der vorliegenden Erfindung ermöglichen in vorteilhafter Wei- se eine kostenneutrale Vorzentrierung des Drosselelements im Deckel der Kolbenpumpe. Embodiments of the present invention advantageously enable a cost-neutral pre-centering of the throttle element in the cover of the piston pump.

Claims

Ansprüche claims
1 . Kolbenpumpe zur Förderung von Fluiden, welche einen Zylinder (20), einen im Zylinder (20) beweglich gelagerten Kolben, und einen zwischen einem Einlassventil und einem Auslassventil (5) angeordneten Druckraum (24) umfasst, welcher von einem Deckel (10) abgeschlossen ist, wobei in der Fluidstromung (3) nach dem Auslassventil (5) ein Drosselelement (30) zum Drosseln der Fluidstromung (3) vorgesehen ist, dadurch gekennzeichnet, dass das Drosselelement (30) als federelastische Scheibe ausgeführt ist, welche in den Deckel (10) eingebracht ist, wobei im Deckel (10) Mittel (18) zur Vorzentrierung des Drosselelements (30) vorhanden sind. 1 . Piston pump for conveying fluids, which comprises a cylinder (20), a piston movably mounted in the cylinder (20), and a pressure chamber (24) arranged between an inlet valve and an outlet valve (5), which is closed by a cover (10) , wherein in the fluid flow (3) after the outlet valve (5) a throttle element (30) for throttling the fluid flow (3) is provided, characterized in that the throttle element (30) is designed as a resilient disc which in the lid (10 ) is introduced, wherein in the cover (10) means (18) for pre-centering of the throttle element (30) are present.
2. Kolbenpumpe nach Anspruch 1 , dadurch gekennzeichnet, dass am Deckel (10) mindestens zwei Pressstege (16) ausgebildet sind, an welchen der Zylinder (20) mit dem Deckel (10) verpresst ist, wobei mindestens eine zwischen zwei Pressstegen (16) ausgebildete Aussparung (17) als Abströmkanal (7) für die Fluidstromung (3) wirkt. 2. Piston pump according to claim 1, characterized in that on the cover (10) at least two pressing webs (16) are formed, to which the cylinder (20) is pressed with the cover (10), wherein at least one between two pressing webs (16) formed recess (17) acts as a discharge channel (7) for the fluid flow (3).
3. Kolbenpumpe nach Anspruch 2, dadurch gekennzeichnet, dass die Zentriermittel (18) mindestens eine Fase umfassen, welche in Anpressrichtung hintenliegend am Presssteg (16) angeordnet ist. 3. Piston pump according to claim 2, characterized in that the centering means (18) comprise at least one chamfer, which is arranged in the pressing direction behind the pressing web (16).
4. Kolbenpumpe nach Anspruch 3, dadurch gekennzeichnet, dass die einzelnen Fasen (18) jeweils einen spitzen Winkel (a) aufweisen. 4. Piston pump according to claim 3, characterized in that the individual chamfers (18) each have an acute angle (a).
5. Kolbenpumpe nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass im Deckel (10) ein Ringkanal (12) ausgebildet ist, welcher vom Drosselelement (30) abgedeckt und bei geöffnetem Auslassventil (5) mit Fluid gefüllt ist, welches über das Drosselelement (30) in mindestens einen Abströmkanal (7) abfließt. 5. Piston pump according to one of claims 1 to 4, characterized in that in the cover (10) an annular channel (12) is formed, which is covered by the throttle element (30) and filled with open outlet valve (5) with fluid, which over the Throttle element (30) flows into at least one outflow channel (7).
6. Kolbenpumpe nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das als federelastische Scheibe ausgeführte Drosselelement (30) zwischen dem Zylinder (20) und dem Deckel (10) angeordnet ist und den Strömungsquerschnitt in dem mindestens einen Abströmkanal (7) in Abhängigkeit von der Druckdifferenz zwischen seiner Oberseite (32.1 ) und Unterseite (32.2) variabel einstellt. 6. Piston pump according to one of claims 1 to 5, characterized in that the designed as a resilient disc throttle element (30) between the cylinder (20) and the lid (10) is arranged and the flow cross-section in the at least one outflow channel (7) in Depending on the pressure difference between its top (32.1) and bottom (32.2) variably sets.
7. Kolbenpumpe nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass eine Deformationsbewegung (ds1 ) des als federelastische Scheibe ausgeführten Drosselelements (30) durch Formgebung einer Stirnfläche (22) des Zylinders (20) begrenzt ist. 7. Piston pump according to one of claims 1 to 6, characterized in that a deformation movement (ds1) of the resilient disk designed as a throttle element (30) by shaping an end face (22) of the cylinder (20) is limited.
8. Kolbenpumpe nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass das als federelastische Scheibe ausgeführte Drosselelement (30) eine 8. Piston pump according to one of claims 1 to 7, characterized in that the designed as a resilient disc throttle element (30) has a
durchströmbare erste Öffnung (34) aufweist, wobei bei einer abgehobenen Stellung des als federelastische Scheibe ausgeführten Drosselelements (30) die erste Öffnung (34) durchströmt und/oder das als federelastische Scheibe ausgeführte Drosselelement (30) umströmt ist.  flowed through the first opening (34), wherein in a lifted position of the elastic disk designed as a throttle element (30), the first opening (34) flows through and / or designed as a resilient disc throttle element (30) is flowed around.
9. Kolbenpumpe nach Anspruch 8, dadurch gekennzeichnet, dass eine unabhängig vom Differenzdruck freigegebene zweite Öffnung (36) mit einem definierten konstanten Strömungsquerschnitt vorhanden ist, wobei die zweite Öffnung (36) als Bohrung in das als federelastische Scheibe ausgeführte Drosselelement (30) und/oder als Vertiefung in Auflager eingebracht ist und/oder als Ringspalt ausgeführt ist. 9. Piston pump according to claim 8, characterized in that an independent of the differential pressure released second opening (36) is provided with a defined constant flow cross-section, wherein the second opening (36) as a bore in the designed as a resilient disc throttle element (30) and / or is introduced as a depression in supports and / or designed as an annular gap.
10. Verfahren zur Montage einer Kolbenpumpe, welche einen Zylinder (20), einen im Zylinder (20) beweglich gelagerten Kolben, und einen zwischen einem Einlassventil und einem Auslassventil (5) angeordneten Druckraum (24) umfasst, welcher von einem Deckel (10) abgeschlossen ist, wobei in der Fluidströmung (3) nach dem Auslassventil (5) ein Drosselelement (30) zum Drosseln der Fluidströmung (3) vorgesehen ist, dadurch gekennzeichnet, dass das Drosselelement (30) als federelastische Scheibe ausgeführt wird und in den Deckel (10) eingebracht wird, wobei im Deckel (10) angeordnete Zentriermittel (18) eine Vorzentrierung des Drosselelements (30) im Deckel (10) bewirken, und wobei das Zylinderelement (20) nach dem Einbringen und der Vorzentrierung des Drosselelements (30) in den Deckel (10) eingepresst wird. 10. A method for assembling a piston pump, which comprises a cylinder (20), a piston movably mounted in the cylinder (20), and a pressure chamber (24) arranged between an inlet valve and an outlet valve (5), which is provided by a cover (10). is completed, wherein in the fluid flow (3) after the outlet valve (5) a throttle element (30) for throttling the fluid flow (3) is provided, characterized in that the throttle element (30) is designed as a resilient disc and in the lid ( 10), wherein in the cover (10) arranged centering means (18) cause a pre-centering of the throttle element (30) in the cover (10), and wherein the cylinder element (20) according to the introduction and the pre-centering of the throttle element (30) is pressed into the lid (10).
EP12724970.4A 2011-07-27 2012-05-29 Piston pump for delivering fluids, and corresponding assembly process for a piston pump Active EP2737208B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011079876A DE102011079876A1 (en) 2011-07-27 2011-07-27 Piston pump for conveying fluids and corresponding assembly method for a piston pump
PCT/EP2012/060043 WO2013013865A1 (en) 2011-07-27 2012-05-29 Piston pump for delivering fluids, and corresponding assembly process for a piston pump

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EP2737208A1 true EP2737208A1 (en) 2014-06-04
EP2737208B1 EP2737208B1 (en) 2020-01-01

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US (1) US9556859B2 (en)
EP (1) EP2737208B1 (en)
JP (1) JP6014135B2 (en)
DE (1) DE102011079876A1 (en)
WO (1) WO2013013865A1 (en)

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Also Published As

Publication number Publication date
EP2737208B1 (en) 2020-01-01
US20140147314A1 (en) 2014-05-29
US9556859B2 (en) 2017-01-31
JP6014135B2 (en) 2016-10-25
WO2013013865A1 (en) 2013-01-31
DE102011079876A1 (en) 2013-01-31
JP2014523504A (en) 2014-09-11

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