EP0522116B1 - Radial-piston pump - Google Patents

Radial-piston pump Download PDF

Info

Publication number
EP0522116B1
EP0522116B1 EP92902932A EP92902932A EP0522116B1 EP 0522116 B1 EP0522116 B1 EP 0522116B1 EP 92902932 A EP92902932 A EP 92902932A EP 92902932 A EP92902932 A EP 92902932A EP 0522116 B1 EP0522116 B1 EP 0522116B1
Authority
EP
European Patent Office
Prior art keywords
cylinder
housing
pots
radial
cylinder housing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP92902932A
Other languages
German (de)
French (fr)
Other versions
EP0522116A1 (en
Inventor
Siegfried Hertell
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.)
Barmag Luk Automobiltechnik GmbH and Co KG
Original Assignee
Barmag Luk Automobiltechnik GmbH and Co KG
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 Barmag Luk Automobiltechnik GmbH and Co KG filed Critical Barmag Luk Automobiltechnik GmbH and Co KG
Publication of EP0522116A1 publication Critical patent/EP0522116A1/en
Application granted granted Critical
Publication of EP0522116B1 publication Critical patent/EP0522116B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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
    • F04B1/0413—Cams
    • 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
    • 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
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/1075—Valves; Arrangement of valves the valve being a flexible annular ring

Definitions

  • the invention relates to a radial piston pump according to the preamble of claim 1.
  • Such a radial piston pump is known from FR-A-2443 594.
  • the cylinder pots are pressed into a recess in the cylinder housing. This creates the risk of canting.
  • the joint press fit between cylinder pots and cylinder housing must be manufactured with high precision in order to offer a precisely defined seating surface for the pressed-in cylinder pot as well.
  • this radial piston pump causes high flow losses, since there are only small flow cross sections and the flow has to be conducted into the common outlet space.
  • the object of the invention is to equip the known radial piston pump with low wear, low pulsation and to ensure a simple construction.
  • the radial piston pump is shown in cross section.
  • the radial piston pump is arranged in a circular cylindrical housing jacket 1.
  • the axis 2 is concentric with the housing jacket 1.
  • the eccentric 3 can be rotated about the axis 2.
  • a support body 4 is freely rotatable.
  • the support body 4 has the shape of a polygon, the number of sides of which corresponds to the number of pistons.
  • Each surface 5 of the support body 4 rests on the end face of a piston 6.
  • the pistons 6 are slidably guided in a guide housing (cylinder housing) 7.
  • the guide housing is also polygonal in cross-section with regard to its outer shape and its inner shape, so that the guide housing 7 forms a polygon ring.
  • the guide housing has cylindrical guide bores in the polygon flanks, which are aligned radially to axis 2.
  • a piston 6 is guided in each guide bore.
  • the thickness of the guide housing is less than the piston length of the piston 6.
  • the width of the interior 14 of this polygon ring is matched to the width of the support body 4 such that the inner polygon of the guide housing forms a stop for the polygon of the support body 4. Therefore, the support body 4 can not make a relative rotation to the cylinder housing 7.
  • the interior 14 of the guide body is connected to the inlet channel of the pump (not shown).
  • the pistons 6 are designed as hollow cylinders which are open on the radially outwardly facing end face, but form a closed end face radially inward.
  • Each piston 6 has an inlet window 13 on the side, which is shown only once in FIG. 1 and has a rectangular shape in order to ensure the largest possible inlet cross section with little piston movement.
  • the guide housing 7 is filled with cylinder pots 8.
  • These cylinder pots are circular cylinders which are closed on one end face 17 and open on the other.
  • Each cylinder pot can be connected to the guide body with individual screws.
  • Another mounting option is that the cylinder pots in the space between the outer jacket 1 and 7 guide body Tensioned spring force.
  • the end face of each cylinder pot is bulged outward and designed to be resilient, so that it is resiliently supported on the outer casing 1.
  • the housing jacket 1 can also be pressed in a spring-elastic manner in the region of the support.
  • spring-elastic compression spring elements can be inserted between the cylinder pots and the outer jacket.
  • Each cylinder pot has radial outlet channels 12.
  • Each cylinder pot is surrounded by a valve band 10, which is made of plastic or steel and elastically encloses the cylinder pot. Therefore, each valve band 10 acts as a check valve against the outlet space 11, which is formed on the outer circumference of the guide housing and within the housing shell 1. This outlet space is very large and therefore acts as a damping space. The outlet space is connected to an outlet channel.
  • each piston is supported against the end wall 17 of its cylinder pot by a compression spring 18. As a result, each piston is pressed onto the polygon side of the support body 4 facing it and is moved outwards by the wobbling movement of the support surface and inwards by the spring force 18. Due to the flat contact of the end face of the pistons on the polygon sides, the support body 4 is prevented from rotating with the eccentric 3. If it - e.g. B. by dirt - but should come to a turning, the corner between the polygon surfaces, which has reached its radially outer dead center, in front of the opposite inner wall of the guide housing. The width of the eccentric in the axial direction is larger than the piston diameter. The inner wall thus acts as a stop that holds the support body 4.
  • screws can be used to fasten the cylinder pots on the guide body.
  • This is shown in the cylinder pot shown above.
  • a cylinder pot is shown at the bottom right (as a variant which is no longer claimed), in which the cylinder pot has a bush 16 on the end facing away from the end face, which has a thread on its outer circumference.
  • the guide bore of the guide body 7 is expanded accordingly and also has a thread, so that the cylinder pot can be screwed into the guide body 7.
  • the end wall 17 of the cylinder pot no longer touches the housing jacket 1.
  • a spring element for. B. a disc spring, placed between the end face 17 and the housing shell 1 and ensure the resilient contact of the cylinder cup 8 on the facing polygonal surface of the guide body 7.
  • FIG. 2 further possibilities are shown to prevent the support body 4 from rotating.
  • a recess 19 is created in an end wall of the support body 4.
  • a pin 20 protrudes into this recess 19, which is attached to the cover of the pump housing, not shown here.
  • the pin 20 and the recess 19 are axially directed.
  • Another alternative is indicated by dashed lines in FIG. 2.
  • the support body 4 has a radial recess 21 which lies outside the polygon surfaces and the contact surfaces between the piston and the polygon surfaces.
  • a pin 22 protrudes radially from the cylinder housing 7 into this recess 21.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Reciprocating Pumps (AREA)

Abstract

The radial-piston pump disclosed has a cylinder block in which the pistons are fitted so that they can move radially in a straight line. The cylinder block has a surface facing radially outwards on which cylinder head pots (8) are mounted so that they surround the pistons, forming a pressure-tight seal. The cylinder block, together with the cylinder head pots (8) mounted on it, is enclosed in an outer casing (1), with which it forms the outlet chamber of the pump.

Description

Die Erfindung betrifft eine Radialkolbenpumpe nach dem Oberbegriff des Anspruchs 1.The invention relates to a radial piston pump according to the preamble of claim 1.

Eine derartige Radialkolbenpumpe ist bekannt durch die FR-A-2443 594. Bei dieser Radialkolbenpumpe werden die Zylindertöpfe in eine Aussparung des Zylindergehäuses eingepresst. Hierdurch besteht die Gefahr einer Verkantung. Deshalb muß der gemeinsame Pressitz zwischen Zylindertöpfen und Zylindergehäuse hochgenau gefertigt werden, um auch für den eingepreßten Zylindertopf eine genau definierte Sitzfläche zu bieten. Darüber hinaus verursacht diese Radialkolbenpumpe hohe Strömungsverluste, da nur geringe Strömungsquerschnitte vorhanden sind und die Strömung umständlich in den gemeinsamen Auslaßraum geleitet werden muß.Such a radial piston pump is known from FR-A-2443 594. In this radial piston pump, the cylinder pots are pressed into a recess in the cylinder housing. This creates the risk of canting. For this reason, the joint press fit between cylinder pots and cylinder housing must be manufactured with high precision in order to offer a precisely defined seating surface for the pressed-in cylinder pot as well. In addition, this radial piston pump causes high flow losses, since there are only small flow cross sections and the flow has to be conducted into the common outlet space.

Eine weitere Radialkolbenpumpe ist bekannt durch die DE OS 39 30 248.Another radial piston pump is known from DE OS 39 30 248.

Die Aufgabe der Erfindung besteht darin, die bekannte Radialkolbenpumpe verschleißarm, pulsationsarm auszurüsten und dabei einen einfachen Aufbau zu gewährleisten.The object of the invention is to equip the known radial piston pump with low wear, low pulsation and to ensure a simple construction.

Die Lösung ergibt sich aus dem Kennzeichen des Anspruchs 1. Ihre Besonderheit liegt darin, daß ein sehr großer Auslaßraum zwischen Gehäusemantel und Zylindergehäuse entsteht, daß der wesentliche Teil der Zylinder, nämlich die Zylindertöpfe, als Einzelbauteile gefertigt und mit den Auslaßventilen versehen werden können, bevor sie an das Zylindergehäuse montiert werden, daß die Zylindertöpfe einen größeren Durchmesser als die Kolben haben und daher ohne Gefahr von Fluchtungsfehlern montiert werden können.The solution results from the characterizing part of claim 1. Its special feature is that a very large outlet space is created between the housing jacket and the cylinder housing, that the essential part of the cylinders, namely the cylinder pots, can be manufactured as individual components and can be provided with the exhaust valves before they are mounted on the cylinder housing so that the cylinder pots have a larger diameter than the pistons and can therefore be installed without the risk of misalignment.

Im folgenden wird anhand der Zeichnungen ein Ausführungsbeispiel beschrieben.An exemplary embodiment is described below with reference to the drawings.

Die Radialkolbenpumpe ist im Querschnitt dargestellt. Die Radialkolbenpumpe ist in einem kreiszylindrischen Gehäusemantel 1 angeordnet. Konzentrisch zu dem Gehäusemantel 1 liegt die Achse 2. Um die Achse 2 ist der Exzenter 3 drehbar. Auf dem Exzenter 3 ist ein Tragkörper 4 frei drehbar gelagert. Der Tragkörper 4 hat die Form eines Polygons, dessen Seitenzahl der Zahl der Kolben entspricht. Jede Fläche 5 des Tragkörpers 4 liegt an der Stirnfläche eines Kolbens 6 an.The radial piston pump is shown in cross section. The radial piston pump is arranged in a circular cylindrical housing jacket 1. The axis 2 is concentric with the housing jacket 1. The eccentric 3 can be rotated about the axis 2. On the Eccentric 3, a support body 4 is freely rotatable. The support body 4 has the shape of a polygon, the number of sides of which corresponds to the number of pistons. Each surface 5 of the support body 4 rests on the end face of a piston 6.

Die Kolben 6 sind in einem Führungsgehäuse (Zylindergehäuse) 7 gleitend geführt. Das Führungsgehäuse ist im Querschnitt hinsichtlich seiner Außenform und seiner Innenform ebenfalls polygonartig ausgebildet, so daß das Führungsgehäuse 7 einen Polygonring bildet. In den Polygonflanken besitzt das Führungsgehäuse in dem dargestellten Fall zylindrische Führungsbohrungen, die radial zur Achse 2 ausgerichtet sind. In jeder Führungsbohrung ist ein Kolben 6 geführt. Die Dicke des Führungsgehäuses ist geringer als die Kolbenlänge der Kolben 6. Die Weite des Innenraumes 14 dieses Polygonrings ist auf die Weite des Tragkörpers 4 abgestimmt derart, daß das Innenpolygon des Führungsgehäuses einen Anschlag für das Polygon des Tragkörpers 4 bildet. Daher kann der Tragkörper 4 keine Relativdrehung zu dem Zylindergehäuse 7 ausführen.The pistons 6 are slidably guided in a guide housing (cylinder housing) 7. The guide housing is also polygonal in cross-section with regard to its outer shape and its inner shape, so that the guide housing 7 forms a polygon ring. In the illustrated case, the guide housing has cylindrical guide bores in the polygon flanks, which are aligned radially to axis 2. A piston 6 is guided in each guide bore. The thickness of the guide housing is less than the piston length of the piston 6. The width of the interior 14 of this polygon ring is matched to the width of the support body 4 such that the inner polygon of the guide housing forms a stop for the polygon of the support body 4. Therefore, the support body 4 can not make a relative rotation to the cylinder housing 7.

Der Innenraum 14 des Führungskörpers ist mit dem Einlaßkanal der Pumpe (nicht dargestellt) verbunden. Die Kolben 6 sind als Hohlzylinder ausgeführt, die an der radial nach außen weisenden Stirnseite offen sind, radial nach innen jedoch eine geschlossene Stirnfläche bilden. Jeder Kolben 6 besitzt seitlich ein Einlaßfenster 13, das in Fig. 1 nur einmal dargestellt ist und das rechteckige Form hat, um einen möglichst großen Einlaßquerschnitt bei geringer Kolbenbewegung zu gewährleisten.The interior 14 of the guide body is connected to the inlet channel of the pump (not shown). The pistons 6 are designed as hollow cylinders which are open on the radially outwardly facing end face, but form a closed end face radially inward. Each piston 6 has an inlet window 13 on the side, which is shown only once in FIG. 1 and has a rectangular shape in order to ensure the largest possible inlet cross section with little piston movement.

Auf dem Außenumfang ist das Führungsgehäuse 7 mit Zylindertöpfen 8 besetzt. Diese Zylindertöpfe sind Kreiszylinder, die an einer Stirnfläche 17 verschlossen und an der anderen offen sind. Jeder Zylindertopf kann durch Einzelschrauben mit dem Führungskörper verbunden werden. Eine andere Befestigungsmöglichkeit besteht darin, daß man die Zylindertöpfe in den Zwischenraum zwischen Außenmantel 1 und Führungskörper 7 durch Federkraft verspannt. Aus diesem Grunde ist die Stirnfläche eines jeden Zylindertopfes nach außen aufgewölbt und federelastisch ausgebildet, so daß sie sich am Außenmantel 1 federnd abstützt. Alternativ oder zusätzlich kann auch der Gehäusemantel 1 im Bereich der Abstützung federelastisch nach außen drückbar sein. Weiterhin können alternativ oder zusätzlich federelastische Druck-Feder-Elemente zwischen den Zylindertöpfen und dem Außenmantel eingelegt werden.On the outer circumference, the guide housing 7 is filled with cylinder pots 8. These cylinder pots are circular cylinders which are closed on one end face 17 and open on the other. Each cylinder pot can be connected to the guide body with individual screws. Another mounting option is that the cylinder pots in the space between the outer jacket 1 and 7 guide body Tensioned spring force. For this reason, the end face of each cylinder pot is bulged outward and designed to be resilient, so that it is resiliently supported on the outer casing 1. As an alternative or in addition, the housing jacket 1 can also be pressed in a spring-elastic manner in the region of the support. Furthermore, as an alternative or in addition, spring-elastic compression spring elements can be inserted between the cylinder pots and the outer jacket.

Jeder Zylindertopf besitzt radiale Auslaßkanäle 12. Jeder Zylindertopf wird von einem Ventilband 10 umgeben, das aus Kunststoff oder Stahl hergestellt ist und den Zylindertopf elastisch umschließt. Daher wirkt jedes Ventilband 10 als Rückschlagventil gegenüber dem Auslaßraum 11, der auf dem Außenumfang des Führungsgehäuses und innerhalb des Gehäusemantels 1 gebildet wird. Dieser Auslaßraum ist sehr groß und wirkt daher als Dämpfungsraum. Der Auslaßraum ist mit einem Auslaßkanal verbunden.Each cylinder pot has radial outlet channels 12. Each cylinder pot is surrounded by a valve band 10, which is made of plastic or steel and elastically encloses the cylinder pot. Therefore, each valve band 10 acts as a check valve against the outlet space 11, which is formed on the outer circumference of the guide housing and within the housing shell 1. This outlet space is very large and therefore acts as a damping space. The outlet space is connected to an outlet channel.

Jeder Kolben stützt sich gegen die Stirnwand 17 seines Zylindertopfes durch eine Druckfeder 18 ab. Dadurch wird jeder Kolben auf die ihm zugewandte Polygonseite des Tragkörpers 4 gedrückt und durch die taumelnde Bewegung der Tragfläche nach außen und durch die Federkraft 18 nach innen bewegt. Durch die flächige Anlage der Stirnseite der Kolben auf den Polygonseiten wird der Tragkörper 4 daran gehindert, mit dem Exzenter 3 mitzudrehen. Falls es - z. B. durch Verschmutzung - jedoch einmal zu einem Mitdrehen kommen sollte, stößt die Ecke zwischen den Polygonflächen, die ihre radial äußere Totlage erreicht hat, vor die gegenüberliegende Innenwand des Führungsgehäuses. Dabei ist die Breite des Exzenters in Achsrichtung größer als der Kolbendurchmesser. Die Innenwand wirkt also als Anschlag, der den Tragkörper 4 festhält. Dadurch entsteht wieder die Relativbewegung zwischen Exzenter und Tragkörper, die die Verschmutzung auflöst. Nunmehr wird der Tragkörper 4 durch die Federkraft 18 der Kolben wieder zurückgedrückt und die flächige Anlage zwischen den Polygonflächen des Tragkörpers und den Stirnflächen der Kolben wieder hergestellt.Each piston is supported against the end wall 17 of its cylinder pot by a compression spring 18. As a result, each piston is pressed onto the polygon side of the support body 4 facing it and is moved outwards by the wobbling movement of the support surface and inwards by the spring force 18. Due to the flat contact of the end face of the pistons on the polygon sides, the support body 4 is prevented from rotating with the eccentric 3. If it - e.g. B. by dirt - but should come to a turning, the corner between the polygon surfaces, which has reached its radially outer dead center, in front of the opposite inner wall of the guide housing. The width of the eccentric in the axial direction is larger than the piston diameter. The inner wall thus acts as a stop that holds the support body 4. This again creates the relative movement between the eccentric and the supporting body, which dissolves the contamination. Now the support body 4 is pushed back by the spring force 18 of the pistons and the flat Restored system between the polygon surfaces of the support body and the end faces of the pistons.

Zur Befestigung der Zylindertöpfe auf dem Führungskörper können zum einen Schrauben dienen. Dies ist bei dem oben gezeigten Zylindertopf dargestellt. Rechts unten ist (als nicht mehr beanspruchte Variante) ein Zylindertopf dargestellt, bei dem der Zylindertopf auf dem von der Stirnseite abgewandten Ende eine Buchse 16 besitzt, die auf ihrem Außenumfang ein Gewinde besitzt. Die Führungsbohrung des Führungskörpers 7 ist entsprechend erweitert und besitzt ebenfalls ein Gewinde, so daß der Zylindertopf in dem Führungskörper 7 eingeschraubt werden kann. Im eingeschraubten Zustand berührt die Stirnwand 17 des Zylindertopfes nicht mehr den Gehäusemantel 1.On the one hand, screws can be used to fasten the cylinder pots on the guide body. This is shown in the cylinder pot shown above. A cylinder pot is shown at the bottom right (as a variant which is no longer claimed), in which the cylinder pot has a bush 16 on the end facing away from the end face, which has a thread on its outer circumference. The guide bore of the guide body 7 is expanded accordingly and also has a thread, so that the cylinder pot can be screwed into the guide body 7. When screwed in, the end wall 17 of the cylinder pot no longer touches the housing jacket 1.

Eine andere Art der Befestigung besteht darin, daß die Stirnseiten 17 der Zylindertöpfe 8 federelastisch sind. Dies ist für die übrigen Zylindertöpfe gezeigt. Die Höhe der Zylindertöpfe wird in diesem Falle so gewählt, daß die Zylindertöpfe sich einerseits zwischen dem Führungskörper 7 und andererseits dem Innenumfang des Gehäusemantels 1 federnd abstützen und mit ihrem Fuß auf die außen liegenden Polygonflächen des Führungskörpers 7 gedrückt werden.Another type of attachment is that the end faces 17 of the cylinder pots 8 are resilient. This is shown for the other cylinder pots. The height of the cylinder pots is chosen in this case so that the cylinder pots are resiliently supported on the one hand between the guide body 7 and on the other hand the inner circumference of the housing shell 1 and are pressed with their foot onto the outer polygonal surfaces of the guide body 7.

Statt oder zusätzlich zu der federnden Ausbildung der Stirnfläche 17 kann auch ein Federelement, z. B. eine Tellerfeder, zwischen die Stirnfläche 17 und den Gehäusemantel 1 gelegt werden und für die federnde Anlage des Zylindertopfes 8 an der zugewandten Polygonfläche des Führungskörpers 7 sorgen.Instead of or in addition to the resilient design of the end face 17, a spring element, for. B. a disc spring, placed between the end face 17 and the housing shell 1 and ensure the resilient contact of the cylinder cup 8 on the facing polygonal surface of the guide body 7.

In Fig. 2 sind weitere Möglichkeiten dargestellt, um das Mitdrehen des Tragkörpers 4 zu verhindern. Im übrigen kann für die Beschreibung von Fig. 2 auf die vorangegangene Beschreibung von Fig. 1 in vollem Umfang Bezug genommen werden. In Fig. 2 ist in einer Stirnwand des Tragkörpers 4 eine Ausnehmung 19 geschaffen. In diese Ausnehmung 19 ragt ein Stift 20 hinein, der an dem hier nicht gezeigten Deckel des Pumpengehäuses befestigt ist. Der Stift 20 sowie die Ausnehmung 19 sind axial gerichtet. Eine andere Alternative ist in Fig. 2 gestrichelt angedeutet. Hierbei besitzt der Tragkörper 4 eine radiale Ausnehmung 21, die außerhalb der Polygonflächen und der Berührflächen zwischen Kolben und Polygonflächen liegt. In diese Ausnehmung 21 ragt ein von dem Zylindergehäuse 7 radial abstehender Stift 22.In Fig. 2 further possibilities are shown to prevent the support body 4 from rotating. For the rest of the description of FIG. 2, reference may be made in full to the previous description of FIG. 1. In Fig. 2, a recess 19 is created in an end wall of the support body 4. A pin 20 protrudes into this recess 19, which is attached to the cover of the pump housing, not shown here. The pin 20 and the recess 19 are axially directed. Another alternative is indicated by dashed lines in FIG. 2. Here, the support body 4 has a radial recess 21 which lies outside the polygon surfaces and the contact surfaces between the piston and the polygon surfaces. A pin 22 protrudes radially from the cylinder housing 7 into this recess 21.

BEZUGSZEICHENAUFSTELLUNGREFERENCE SIGN LISTING

11
Gehäuse, GehäusemantelHousing, housing jacket
22nd
Achseaxis
33rd
Exzentereccentric
44th
TragkörperSupporting body
55
TragflächenWings
66
Kolbenpiston
77
Zylindergehäuse, FührungsgehäuseCylinder housing, guide housing
88th
Zylinderkopf, ZylindertopfCylinder head, cylinder pot
99
StirnflächeFace
1010th
Ventil, AuslaßventilValve, exhaust valve
1111
Dämpfungsraum, AuslaßraumDamping space, outlet space
1212th
AuslaßOutlet
1313
Einlaß, EinlaßfensterInlet, inlet window
1414
Innenrauminner space
1515
Anschlag, InnenwandStop, inner wall
1616
BuchseRifle
1717th
StirnflächenEnd faces
1818th
DruckfederCompression spring
1919th
AusnehmungRecess
2020th
Stiftpen
2121
AusnehmungRecess
2222
Stiftpen

Claims (6)

  1. Radial piston pump,
    whose pistons (6) are movable in a cylinder housing (7) having radial piston guides and are operated by eccentric (3), and whose cylinder housing (7) is enclosed by a housing case (1) and with said housing case forms the outlet chamber (11),
    the cylinder housing (7) in the region of the piston guides having cylinder pots (8), which have outlet openings (12) and valves (10),
    characterized in that
    the thickness of the cylinder housing (7) is less than the length of the pistons (6), and that
    the cylinder pots (8) are mounted from outside onto the cylinder housing (7) in such a way that they project with their outlet openings (12) into the outlet chamber (11) between housing case (1) and cylinder housing (7).
  2. Pump according to claim 1,
    characterized in that
    the cylinder pots (8) are circular cylinders, that the outlet openings are radial holes,
    and that the cylinder pots are each surrounded at their outer periphery by a radial band as an outlet valve (10).
  3. Pump according to claim 1 or 2,
    characterized in that
    each cylinder pot (8) is fastened by screws to the cylinder housing (7).
  4. Pump according to claim 1 or 2,
    characterized in that
    the cylinder pots (8) are elastically braceable between housing case (1) and cylinder housing (7) by means of a radial spring, either the radially outward-directed front face (17) of each cylinder pot and/or the housing case (1) in the region of each cylinder pot being designed as a spring and/or radially resiliently yielding spring elements being inserted between housing case and cylinder pot front face (17).
  5. Radial piston pump according to the preamble of claim 1, in particular according to one of the preceding claims,
    characterized in that
    disposed on the eccentric of the pump is a supporting body in the form of a polygon,
    and that provided in the cylinder housing are stops which project into the circle of movement of the corners of the polygonal supporting body but not into the circle of movement of the centre lines of the faces of the polygonal supporting body.
  6. Pump according to claim 5,
    characterized in that
    the stops are formed in that the cylinder housing in its inner cross-section takes the form of a polygon similar to the supporting body, the difference of the diagonals being less than the eccentricity.
EP92902932A 1991-01-30 1992-01-25 Radial-piston pump Expired - Lifetime EP0522116B1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE4102623 1991-01-30
DE4102623 1991-01-30
DE4137129 1991-11-12
DE4137129 1991-11-12
PCT/DE1992/000044 WO1992014056A1 (en) 1991-01-30 1992-01-25 Radial-piston pump

Publications (2)

Publication Number Publication Date
EP0522116A1 EP0522116A1 (en) 1993-01-13
EP0522116B1 true EP0522116B1 (en) 1995-07-12

Family

ID=25900593

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92902932A Expired - Lifetime EP0522116B1 (en) 1991-01-30 1992-01-25 Radial-piston pump

Country Status (5)

Country Link
EP (1) EP0522116B1 (en)
JP (1) JPH05505440A (en)
DE (1) DE59202858D1 (en)
ES (1) ES2076746T3 (en)
WO (1) WO1992014056A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998014704A1 (en) * 1996-10-01 1998-04-09 Mannesmann Rexroth Ag Radial piston pump
WO2022238148A1 (en) * 2021-05-10 2022-11-17 thyssenkrupp Presta Ilsenburg GmbH Radial piston pump, and process for manufacturing a radial piston pump
WO2022238149A1 (en) * 2021-05-10 2022-11-17 thyssenkrupp Presta Ilsenburg GmbH Radial piston pump, in particular radial piston compressor

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4237049A1 (en) * 1991-11-13 1993-05-19 Barmag Luk Automobiltech Radial piston pump assembly - has pistons driven in radial direction by bearer ring set in stagger motion by rotating eccentric
DE19518198A1 (en) * 1995-05-18 1996-11-21 Luk Automobiltech Gmbh & Co Kg Radial piston pump
US6007305A (en) * 1996-12-19 1999-12-28 Caterpillar Inc. Internal combustion engine with integral crankshaft driven pump
CN105715473A (en) * 2016-04-01 2016-06-29 郑州科技学院 Multi-cylinder high-pressure radial plunger pump

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2827609A1 (en) * 1978-06-23 1980-01-10 Fichtel & Sachs Ag RADIAL PISTON PUMP
DE2852852C2 (en) * 1978-12-07 1981-02-26 Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen Piston pump, especially radial piston pump
DE2946746A1 (en) * 1979-11-20 1981-05-27 Fichtel & Sachs Ag, 8720 Schweinfurt Hydraulic radial piston pump - has inlet flow increasingly throttled with increasing speed and with increasing pressure at outlet
GB2160596B (en) * 1984-06-23 1987-04-29 Pitcraft Summit Ltd Pump
IT1218675B (en) * 1987-08-25 1990-04-19 Weber Srl RADIAL PUMP PUMP IN PARTICULAR PUMP FOR INJECTION OF FUEL IN DIESEL CYCLE ENGINES

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998014704A1 (en) * 1996-10-01 1998-04-09 Mannesmann Rexroth Ag Radial piston pump
WO2022238148A1 (en) * 2021-05-10 2022-11-17 thyssenkrupp Presta Ilsenburg GmbH Radial piston pump, and process for manufacturing a radial piston pump
WO2022238149A1 (en) * 2021-05-10 2022-11-17 thyssenkrupp Presta Ilsenburg GmbH Radial piston pump, in particular radial piston compressor

Also Published As

Publication number Publication date
ES2076746T3 (en) 1995-11-01
EP0522116A1 (en) 1993-01-13
JPH05505440A (en) 1993-08-12
DE59202858D1 (en) 1995-08-17
WO1992014056A1 (en) 1992-08-20

Similar Documents

Publication Publication Date Title
DE4107979C2 (en) Hydraulic high pressure pump for motor vehicle brake systems
EP0162238B1 (en) Axial piston machine, especially a pump of the inclined plate type
DE68904719T2 (en) HYDROPNEUMATIC SUSPENSION FOR A MOTOR VEHICLE.
DE19653895A1 (en) Pump, in particular for a hydraulic brake control system
DE3701857A1 (en) RADIAL PISTON PUMP
DE2635166A1 (en) COAXIAL INLET AND EXHAUST VALVE
EP0522116B1 (en) Radial-piston pump
DE3030285A1 (en) AXIAL PISTON PUMP
DE69731174T2 (en) Hydraulic motor with radially arranged, tubular drive elements
DE1751143A1 (en) Detachable snap ring holder
DE8909228U1 (en) Rotating nozzle
DE3721390C1 (en) High-pressure ball valve
EP0058878B1 (en) Device for turning suspended loads
DE2061960B2 (en) Radial piston pump with throttle device to limit the delivery volume
DE2616437A1 (en) Pump with radial cylinders and pistons - has several radially placed cylinders with spring loaded closing plugs acting as discharge valves
DE4107704C2 (en) hydraulic pump
DE4018153A1 (en) Hydraulic fluid pump - has pressure value which is controlled by spring assembly
DE9209366U1 (en) Radial piston pump
DE4318073A1 (en) Radial piston pump with pot-shaped pistons - uses inserts concentric with piston springs to minimise fluid dead space
DE3102121C2 (en)
DE2061962A1 (en) Radial piston pump with sliding shoe between piston and eccentric
DE20109476U1 (en) Pressure relief valve
DE3935117A1 (en) Radial piston pump with eccentric on shaft - chill mould casting technique provides bearing metal layer
DE1800624A1 (en) Cylindrical hydraulic piston
DE2206410A1 (en) DEVICE FOR DAMPING THE MOVEMENT OF THE PISTON IN A HYDRAULIC CYLINDER

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19920924

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES FR GB IT

17Q First examination report despatched

Effective date: 19931026

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR GB IT

REF Corresponds to:

Ref document number: 59202858

Country of ref document: DE

Date of ref document: 19950817

ITF It: translation for a ep patent filed

Owner name: DE DOMINICIS & MAYER S.R.L.

ET Fr: translation filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2076746

Country of ref document: ES

Kind code of ref document: T3

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19951009

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: FR

Ref legal event code: CD

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19981211

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19981222

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19990109

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 19990112

Year of fee payment: 8

REG Reference to a national code

Ref country code: ES

Ref legal event code: PC2A

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000125

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000126

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20000125

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000929

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20001101

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20010910

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050125