EP2737208B1 - Kolbenpumpe zur förderung von fluiden und korrespondierendes montageverfahren für eine kolbenpumpe - Google Patents

Kolbenpumpe zur förderung von fluiden und korrespondierendes montageverfahren für eine kolbenpumpe Download PDF

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Publication number
EP2737208B1
EP2737208B1 EP12724970.4A EP12724970A EP2737208B1 EP 2737208 B1 EP2737208 B1 EP 2737208B1 EP 12724970 A EP12724970 A EP 12724970A EP 2737208 B1 EP2737208 B1 EP 2737208B1
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EP
European Patent Office
Prior art keywords
throttle element
cover
piston pump
cylinder
pressing
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.)
Active
Application number
EP12724970.4A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2737208A1 (de
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
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP2737208A1 publication Critical patent/EP2737208A1/de
Application granted granted Critical
Publication of EP2737208B1 publication Critical patent/EP2737208B1/de
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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

  • the invention is based on a piston pump for conveying fluids.
  • the present invention also 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 for conveying pressure media are frequently used in vehicle brake systems, in which at least one piston can be moved back and forth by means of an eccentric.
  • these so-called pump elements consist of a piston, a piston running surface which is often designed as a cylinder, inlet and outlet valves and sealing elements.
  • the valves serve to control the fluid during the pumping movement of the piston.
  • the inlet valve is used to prevent the fluid from flowing back into the intake chamber during the compression phase.
  • the outlet valve prevents the fluid from flowing back from the pressure side into the pump interior and is typically housed in the cover of the pump.
  • At least one throttle arrangement is provided for throttling the fluid flow after the outlet valve in order to optimize noise and pulsation.
  • a piston pump for brake pressure control in a hydraulic vehicle brake system comprises a pump housing, a receiving bore for the piston pump arranged in the pump housing and a valve cover which closes the receiving pump to the outside, in which an outlet valve and first and second channel sections of an outflow channel are accommodated.
  • the outflow geometry influences the noise behavior of the piston pump and is therefore usually carried out with a suitable tapering of the outflow channel, which then represents a throttling effect.
  • the piston pump for conveying fluids described comprises a piston, a cylinder element and a pressure chamber which is arranged between an inlet valve and an outlet valve and which is closed by a cover, the outlet valve comprising a closing body designed as a ball, a pretensioning device acting on the closing body as a spiral spring, comprises a base element for supporting the pretensioning device and a disk element, and wherein a sealing seat of the outlet valve is arranged on the disk element.
  • the use of the disk element is intended to ensure that component tolerances of different components of the piston pump cannot have a negative effect on the outlet valve.
  • WO 03/004872 A1 describes a piston pump for conveying fluids.
  • the piston pump described comprises a cylinder, a piston movably mounted in the cylinder and a pressure chamber which is arranged between an inlet valve and an outlet valve and is closed by a cover.
  • a throttle element for throttling the fluid flow is provided, which is designed as a spring-elastic disk which is introduced into the cover.
  • 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 throttle element designed as a resilient disc is made possible in a cover without obstructing the oscillating movement of the throttle element during operation.
  • the essence of the invention is a cost-neutral centering of the throttle element designed as a spring-elastic disc.
  • the throttle element is used in the Mounted in the piston pump cover.
  • the pump cylinder is then pressed onto the cover.
  • a centering of the throttle element is provided in the pump cylinder, but a deforming of an insufficiently pre-centered throttle element can occur due to the rapid assembly. It is therefore advisable to pre-center the throttle element in the cover before installing the pump cylinder. This precentering must not restrict the throttle element in its movement, however, because a blocked throttle element prevents the piston pump from functioning and can lead to a system failure due to overloading of a drive.
  • Embodiments of the present invention provide a piston pump for conveying fluids, which comprises a cylinder, a piston movably mounted in the cylinder, and a pressure space arranged between an inlet valve and an outlet valve, which is closed off by a cover, the fluid flow after the Exhaust valve a throttle element is provided for throttling the fluid flow.
  • the throttle element is designed as a resilient disk which is introduced into the cover, means for precentering the throttle element being present in the cover.
  • At least two press webs are formed on the cover, on which the cylinder is pressed with the cover, at least one recess formed between two press webs acting as an outflow channel for the fluid flow.
  • the centering means comprise at least one chamfer, which is arranged on the back of such a pressing web in the pressing direction.
  • the bevels can be implemented in a cost-neutral manner in the cover, which is designed, for example, as a cold impact part.
  • a throttle element for throttling in the fluid flow after the outlet valve the fluid flow is provided, the throttle element is designed as a resilient disc and inserted into the cover. This causes arranged in the lid Centering means a pre-centering of the throttle element in the cover and the cylinder element is pressed into the cover after the introduction and pre-centering of the throttle element.
  • the individual bevels each have an acute angle, which is preferably greater than 60 °. Because of the acute angle, it can advantageously be ensured that the throttle element does not jam on the chamfer or the centering means during operation.
  • annular channel is formed in the cover, which is covered by the throttle element and, when the outlet valve is open, is filled with fluid which flows into at least one outflow channel via the throttle element.
  • the throttle element designed as a resilient disc is arranged between the cylinder and the cover and variably adjusts the flow cross section in the at least one outflow channel as a function of the pressure difference between its top and bottom.
  • the throttle element designed as a resilient disc can be arranged under a defined prestress between the cover and the cylinder, so that an opening differential pressure is predetermined. The pressure difference lifts the throttle element designed as a spring-elastic disk from the side with the higher pressure, so that the throttle element designed as a spring-elastic 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 spring-elastic disk 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.
  • fluidic end position damping can further optimize the opening and noise behavior.
  • the throttle element designed as a spring-elastic disk has a first opening through which it can flow, wherein when the throttle element designed as a spring-elastic disk is in a raised position, the first opening of the throttle element designed as a spring-elastic disk flows through and / or the flow around the throttle element designed as a spring-elastic disk.
  • a second opening with a defined constant flow cross section that is released independently of the differential pressure.
  • the second opening can be introduced, for example, as a bore in the throttle element designed as a spring-elastic disk and / or as a depression in supports and / or as an annular gap.
  • the second opening in the throttle element designed as a resilient disc acts as an additional static throttle and enables a dynamic throttle with a static component to be implemented simply and inexpensively.
  • the advantage of such a construction is that the positive functions of a dynamic choke can be combined and integrated very inexpensively and easily with a static choke. It is an additional component that can be designed, for example, as a stamped part or as an etched component.
  • the throttle element designed as a spring-elastic disc bends and the dynamic throttle opens, so that a large amount of fluid can also flow out. Below the specified pressure difference, a smaller amount of fluid flows over the static throttle, i.e. through the second opening.
  • the throttle element When a dynamic throttle is integrated into a piston pump, which is used, for example, in an anti-lock braking system (ABS) and / or for an electronic stability program in the vehicle, the throttle element can be centered, for example, by a small chamfer on the cylinder. A rough centering over the outer diameter of the throttle element on the cover is only possible to a limited extent, since the throttle element can deform due to the high press-in speeds of the cylinder if the latter is not correctly centered. In addition, it must be prevented that the throttle element rests on one side and the throttle element may jam. A clamping throttle element prevents the dynamic throttle element from kinking and prevents the high flow rate. This can U can lead to a complete failure of the system because the drive is overloaded.
  • ABS anti-lock braking system
  • a throttle element 30 for throttling the fluid flow 3 is provided in a fluid flow 3 after the outlet valve 5.
  • the outlet valve 5 comprises a closing body 5.1 designed as a ball, an outlet valve seat 5.2 as well as 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, which is designed as a spring-elastic 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 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 exists between the second support arranged in the cover 10, on which the outer edge of the throttle element 30 designed as a spring-elastic disc rests, and the third support arranged in the cover 10, on which the inner edge of the throttle element 30 designed as a spring-elastic disc lies in the region of the lies first opening 34, an offset dv1, which leads to a preload in the throttle element 30 designed as a spring-elastic disc, which must be applied by a prevailing fluid pressure in order to lift the outer edge of the throttle element 30 designed as a spring-elastic disc from the third support.
  • the inner edge of the throttle element 30, which is designed as a spring-elastic disk lies both on the first bearing arranged on the cylinder element 20 and on the second bearing
  • a deformation movement ds1 of the throttle element 30 designed as a spring-elastic disk is limited by a corresponding shaping of an end face 22 of the cylinder 20.
  • the end face 22 is curved, the dimensions of the curvature specifying the maximum possible deformation movement of the throttle element 30 designed as a spring-elastic disk.
  • Fig. 2 shows the piston pump 1 at a differential pressure which is lower than a predetermined limit pressure value, so that the throttle element designed as a spring-elastic disk rests on all supports and only the static throttle acts, so that a flowing fluid flow 3.1 through a hole in the as a spring-elastic disk throttle element 30 introduced second opening 36 is determined.
  • FIG. 3 shows the piston pump 1 at a differential pressure that is higher than the predetermined limit pressure value, so that the outer edge of the throttle element 30 designed as a spring-elastic disc is lifted off the third support and only the inner edge of the throttle element designed as a spring-elastic disc on the first and second supports is applied.
  • the dynamic throttle acts, so that a further fluid flow 3.2 flows around the throttle element, which is designed as a spring-elastic disk, and which forms an outflowing total fluid flow 3 with the fluid flow 3.1 flowing through the second opening 36.
  • An annular channel 12 is formed in the cover 10 and is covered by the throttle element 30. The fluid arrives when the outlet valve 5 is open, ie when it comes out of the outlet valve seat 5.2 lifted closing body 5.1, via a connecting channel 14 into the ring channel 58 and flows through the throttle element 30 into at least one outflow channel 7.
  • centering means 18 are present in the cover 10 according to the invention, which cause the throttle element 30 to be pre-centered in the cover 10.
  • six press webs 16 are formed in the cover 10, on which the cylinder 20 can be pressed with the cover 10.
  • a recess 17 is formed between each of two press bars 16, which act as outflow channels 7 for the fluid flow 3 when the cylinder 20 is pressed in.
  • the cover 10 of the piston pump 1 has six cutouts 18 and the piston pump 1 thus has six outflow channels 7.
  • the centering means 18 comprise at least one chamfer, which is arranged on the back of the pressing web 16 in the pressing direction.
  • the centering means 18 comprise six chamfers.
  • the individual bevels 18 each have an acute angle ⁇ , which is preferably greater than 60 °, in order to prevent jamming of the throttle element 30, which is designed as a spring-elastic disk.
  • the throttle element 30 is designed as a spring-elastic disk and is introduced into the cover 10.
  • the centering means 18 arranged in the cover 10 causes the throttle element 30 to be pre-centered in the cover 10, and the cylinder element 20 can be pressed into the cover 10 after the throttle element 30 has been introduced and pre-centered, without deforming the throttle element 30, which is designed as a spring-elastic disc or damage.
  • second centering means 28 are provided, which are designed as a circumferential collar adapted to the first opening 34 in the throttle element 30 and bring about 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Reciprocating Pumps (AREA)
EP12724970.4A 2011-07-27 2012-05-29 Kolbenpumpe zur förderung von fluiden und korrespondierendes montageverfahren für eine kolbenpumpe Active EP2737208B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011079876A DE102011079876A1 (de) 2011-07-27 2011-07-27 Kolbenpumpe zur Förderung von Fluiden und korrespondierendes Montageverfahren für eine Kolbenpumpe
PCT/EP2012/060043 WO2013013865A1 (de) 2011-07-27 2012-05-29 Kolbenpumpe zur förderung von fluiden und korrespondierendes montageverfahren für eine kolbenpumpe

Publications (2)

Publication Number Publication Date
EP2737208A1 EP2737208A1 (de) 2014-06-04
EP2737208B1 true EP2737208B1 (de) 2020-01-01

Family

ID=46201612

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12724970.4A Active EP2737208B1 (de) 2011-07-27 2012-05-29 Kolbenpumpe zur förderung von fluiden und korrespondierendes montageverfahren für eine kolbenpumpe

Country Status (5)

Country Link
US (1) US9556859B2 (ja)
EP (1) EP2737208B1 (ja)
JP (1) JP6014135B2 (ja)
DE (1) DE102011079876A1 (ja)
WO (1) WO2013013865A1 (ja)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010040157A1 (de) * 2010-09-02 2012-03-08 Robert Bosch Gmbh Kolbenpumpe zur Förderung von Fluiden und zugehörige Fahrzeugbremsanlage
EP2801550A1 (en) 2013-05-10 2014-11-12 Ammonia Casale S.A. A process for producing ammonia synthesis gas with high temperature shift and low steam-to-carbon ratio
DE102013224516A1 (de) 2013-11-29 2015-06-03 Robert Bosch Gmbh Anordnung zur Drosselung einer Fluidströmung
DE102013224688A1 (de) 2013-12-02 2015-06-03 Robert Bosch Gmbh Anordnung zur Drosselung einer Fluidströmung
DE102014220368A1 (de) * 2014-10-08 2016-04-14 Robert Bosch Gmbh Kolbenpumpe für eine hydraulische Fahrzeugbremsanlage
DE102014222741A1 (de) 2014-11-06 2016-05-12 Robert Bosch Gmbh Vorrichtung zur Drosselung einer Fluidströmung und korrespondierende Kolbenpumpe zur Förderung von Fluiden
DE102019207686A1 (de) 2019-05-25 2020-11-26 Robert Bosch Gmbh Hydroaggregat, insbesondere zur Versorgung eines Bremskreises einer Fahrzeugbremsanlage mit Druckmittel unter Bremsdruck

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DE4107979C2 (de) * 1991-03-13 1998-07-09 Bosch Gmbh Robert Hydraulische Hochdruckpumpe für Kraftfahrzeug-Bremsanlagen
JP2605454Y2 (ja) * 1993-01-27 2000-07-17 ジヤトコ・トランステクノロジー株式会社 ガスケット
JP2001225742A (ja) * 2000-02-18 2001-08-21 Unisia Jecs Corp アンチロックブレーキ装置
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DE102006027555A1 (de) 2006-06-14 2007-12-20 Robert Bosch Gmbh Kolbenpumpe mit reduziertem Geräusch
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DE102008002740A1 (de) 2008-06-27 2009-12-31 Robert Bosch Gmbh Kolbenpumpe
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Also Published As

Publication number Publication date
EP2737208A1 (de) 2014-06-04
US20140147314A1 (en) 2014-05-29
DE102011079876A1 (de) 2013-01-31
JP6014135B2 (ja) 2016-10-25
JP2014523504A (ja) 2014-09-11
WO2013013865A1 (de) 2013-01-31
US9556859B2 (en) 2017-01-31

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