DK148637B - RADIAL PISTON MACHINE - Google Patents

RADIAL PISTON MACHINE Download PDF

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Publication number
DK148637B
DK148637B DK44880A DK44880A DK148637B DK 148637 B DK148637 B DK 148637B DK 44880 A DK44880 A DK 44880A DK 44880 A DK44880 A DK 44880A DK 148637 B DK148637 B DK 148637B
Authority
DK
Denmark
Prior art keywords
relief
radial piston
piston machine
guide pin
notes
Prior art date
Application number
DK44880A
Other languages
Danish (da)
Other versions
DK44880A (en
DK148637C (en
Inventor
Gerhard Nonnenmacher
Original Assignee
Bosch Gmbh Robert
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 Bosch Gmbh Robert filed Critical Bosch Gmbh Robert
Publication of DK44880A publication Critical patent/DK44880A/en
Publication of DK148637B publication Critical patent/DK148637B/en
Application granted granted Critical
Publication of DK148637C publication Critical patent/DK148637C/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404Details or component parts
    • F04B1/0452Distribution members, e.g. valves
    • F04B1/0456Cylindrical

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

Description

i 148637 oi 148637 o

Opfindelsen angår en radialstempelmaskine med et roterende cylinderlegeme, der er lejret på en stationær styretap og har boringer med i disse forskydeligt lejrede stempler, der glider mod en kurvebane, og hvor der i sty-5 retappen er udformet to ved kamme adskilte udsparinger, der danner høj- og lavtryksside og er forbundet med i styretappen forløbende boringer til til- og bortførsel af trykmiddel, samt ved siden af udsparingerne i omkredsretningen forløbende aflastningsnoter.BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to a radial piston machine having a rotating cylinder body which is mounted on a stationary guide pin and has bores therein with these displaceably mounted pistons which slide against a curve path and wherein in the guide pin there are two cut-apart recesses forming high and low pressure side and are connected with bores extending in the guide pin for supply and removal of pressure medium, and next to the recesses in the circumferential direction relief notes.

10 I sådanne radialstempelmaskiner optræder der mel lem cylinderlegemet og styretappen hydrauliske hovedkræfter, som fremkaldes af det fra højtrykssiden indtrængende trykmiddel. Disse kræfter udlignes i alt væsentligt ved hjælp af hydrostatiske aflastningsfelter i området ved udsparin-15 gerne. Desuden optræder der imidlertid også i kurvebanens forskydningsretning kræfter, hvis størrelse er afhængig af den indstillede ekscentricitet. I en fra beskrivelsen til britisk patent nr. 1.384.430 kendt radialstempelmaskine, hvor aflastningsnoterne er afbrudt både af den i området 20 ved det ydre dødpunkt beliggende kam og af kammen ved det indre dødpunkt, virker disse kræfter modsat den retning, der er hensigtsmæssig med henblik på aflastning af cylinderlegemet (nemlig i retning mod det indre dødpunkt), hvorfor aflastningen af cylinderlegemet ikke er tilfredsstillende.10 In such radial piston machines, hydraulic main forces are caused between the cylinder body and the control pin, which are induced by the high pressure side penetrating pressure. These forces are substantially offset by hydrostatic relief fields in the region of the recesses. However, in the direction of the displacement path of the curve path, however, forces whose size depends on the set eccentricity are also present. In a radial piston machine known from the specification of British Patent No. 1,384,430, in which the relief notes are interrupted both by the cam located in the region 20 at the outer dead point and by the cam at the inner dead point, these forces act opposite to the direction appropriate with the for the relief of the cylinder body (namely towards the inner dead-end), so that the relief of the cylinder body is not satisfactory.

25 Dette medfører fremkomsten af en uønsket spalte mellem cylinderlegemet og styretappen, hvorved der opstår uønskede lækagetab. I denne maskine må de parvis overfor hinanden liggende delstrækninger af aflastningsnoterne desuden være forbundet med hinanden gennem en boring, hvilket kræver u-30 nødigt store udgifter til bearbejdning.25 This results in the occurrence of an undesirable gap between the cylinder body and the guide pin, resulting in undesirable leakage losses. In addition, in this machine, the pairwise opposite sections of the relief notes must be connected to one another through a bore, which requires unnecessarily high costs for machining.

Denne ulempe er overvundet ved radialstempelmaski-nen ifølge opfindelsen, der er ejendommelig ved, at aflastningsnoterne forløber uden afbrydelse gennem området ved det ydre dødpunkt og kun er afbrudt af den i området ved 35 det indre dødpunkt beliggende kam.This disadvantage is overcome by the radial piston machine according to the invention, which is characterized in that the relief notes extend without interruption through the area at the outer dead point and are interrupted only by the cam located in the area at the inner dead point.

148637 2148637 2

OISLAND

En sådan radialstempelmaskine har i sammenligning med den kendte maskine den fordel, at den er simplere at fremstille, og at de fra udsparingen på højtrykssiden udgående såkaldte "vagabonderende" trykfelter i dette om-5 råde kan opnå en større udbredelse end ved den øvrige del af omkredsen, fordi der ved det indre dødpunkt er en aflastningsflade til rådighed, som mangler ved det ydre dødpunkt. Det har vist sig, at der herved kompenseres bedre for de foran omtalte kræfter, og cylinderlegemet derved lø-10 ber bedre rundt.Such a radial piston machine, in comparison with the known machine, has the advantage that it is simpler to manufacture and that the so-called "vagabonding" pressure fields in this area can obtain a wider spread than in the other part of the machine. the circumference, because at the inner dead point, a relief surface is available which is missing at the outer dead point. It has been found that this is better compensated for by the aforementioned forces, and the cylinder body thereby runs better around.

Underkravene omhandler let fremstillelige, hensigtsmæssige udførelsesformer for radialstempelmaskinen i-følge opfindelsen.The subclaims disclose readily fabricated, convenient embodiments of the radial piston machine according to the invention.

Opfindelsen skal i det følgende forklares nærmere 15 under henvisning til tegningen, på hvilken fig. 1 viser et længdesnit gennem en radialstempelmaskine, fig. 2 et snit efter linien II-II i fig. 1, og fig. 3 en modificering.The invention will now be explained in greater detail with reference to the drawing, in which 1 is a longitudinal section through a radial piston machine; FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. 3 a modification.

2020

Den på tegningen viste radialstempelmaskine består af et hus 1, som er aflukket ved et husdæksel 2. I husdækslet 2 er en styretap 4 fast anbragt i en boring 3. I et cylinderlegeme 5 er der udformet et blindborehul 6, og legemet 5 er skudt ind på styretappen 4 ved hjælp af dette blindborehul.The radial piston machine shown in the drawing consists of a housing 1, which is closed by a housing cover 2. In the housing cover 2, a guide pin 4 is fixedly fixed in a bore 3. In a cylinder body 5 a blind bore 6 is formed and the body 5 is inserted. on the guide pin 4 by means of this blind borehole.

2525

Desuden er legemet 5 pa sin ud fra huset ragende ende lejret i et glideleje 7 i huset.In addition, the body 5 on its projecting end is housed in a slide bearing 7 in the housing.

I cylinderlegemet 5 er der anbragt radialt forløbende cylinderboringer 8, hvori stempler 9 er glideforskydeligt modtaget. Stemplerne 9 er ledforbundet med qlidesko 10, som 30 glider mod en kurvebane 12's glideflade 11. Til kurvebanen 12 er der fastgjort en stillemøtrik 13, hvori der er modtaget en stillespindel 14, som er lejret i en til huset fastgjort konsol 15 og er drejelig med et håndhjul 16. En trykfjeder 17 påfører kurvebanen 12 en tilbageføringskraft.In the cylinder body 5 are arranged radially extending cylinder bores 8, in which pistons 9 are slidably received. The pistons 9 are articulated with sliding shoe 10, which slides against the sliding surface 11 of a curvature path 12. Attached to the curvature path 12 is a adjusting nut 13, in which a adjusting spindle 14 is received, which is mounted in a bracket 15 attached to the housing and is pivotable. a handwheel 16. A compression spring 17 applies a return force to the curve path 12.

I fig. 2 og 3 er vist enkelheder ved udformningen af styretappen 4. På styretappen 4 er der udformet to diametralt over for hinanden liggende udsparinger 20 og 21, som sam- 35 3 148637 o virker med cylinderboringen og er indbyrdes adskilt ved kamme 18 og 19. Udsparingerne 20 og 21 er gennem tværboringer 22' og 23' forbundet med hver sin i styretappen 4's længderetning forløbende blindboring henholdsvis 22 og 23 for til- eller 5 bortledning af trykmediet.In FIG. 2 and 3, simplifications are shown in the design of the guide pin 4. On the guide pin 4, two diametrically opposite recesses 20 and 21 are formed which cooperate with the cylinder bore and are spaced apart by the ridges 18 and 19. The recesses 20 and 21 are connected through blind bores 22 'and 23' to each blind bore extending in the longitudinal direction of the guide pin 4 22 and 23, respectively, for supply or discharge of the pressure medium.

På begge sider af udsparingerne 20, 21 er udformet i omkredsretningen forløbende, smalle aflastningsnoter 24, 25, som imidlertid er afbrudt ved det indre dødpunkt IT. Mellem en udsparing 20, 21 og en tilgrænsende aflastningsnot 24, 25 10 er der udformet en lukkeribbe 30, 31, 32 og 33.On both sides of the recesses 20, 21, circumferentially narrow relief notes 24, 25 are formed, which are however interrupted at the inner dead center IT. Between a recess 20, 21 and an adjacent relief groove 24, 25 10, a shutter rib 30, 31, 32 and 33 is formed.

Ved drejning af cylinderlegemet 5 glider giideskoen 10 på kurvebanen 12's glideflade og tvinger stemplerne 9 til at bevæge sig frem og tilbage, hvorved de fra én udsparing, f.eks. udsparingen 20, indsuger trykmedium, medens de ved den 15 anden udsparing, altså udsparingen 21, udskyder trykmediet. Stemplernes slaglængde kan ændres ved forskydning af kurvebanen 12, hvilket tilvejebringes ved aktivering af håndhjulet 16.When rotating the cylinder body 5, the guide shoe 10 slides on the sliding surface of the curvature path 12 and forces the pistons 9 to move back and forth, thereby forcing them from one recess, e.g. the recess 20, sucks in pressure medium, while at the second recess, i.e. the recess 21, it extends the pressure medium. The stroke length of the pistons may be changed by displacement of the curve path 12, which is provided by actuation of the handwheel 16.

Gennem spalten mellem styretappen 4 og boringen 6 i 20 cylinderlegemet 5 udstrømmer der fra udsparingerne 20 og 21 langs styretappen trykmedium, som fortrinsvis ender i aflastningsnoterne 24 og 25. De i stempelaksernes retning på cylinderenden virkende hydrauliske hovedkræfter, som er virksomme på højtrykssiden, udlignes i det væsentlige ved hy-25 drostatiske felter i området ved udsparingerne 20 og 21 og lukkeribberne 30-33. Der er imidlertid også tale om kræfter i kurvebanens forskydningsretning, som er afhængig af den indstillede excentricitet. Idet aflastningsnoterne ifølge opfindelsen er afbrudt ved det indre dødpunkt IT, 30 hvori de førnævnte kræfter virker, opnås den tekniske virkning, at de fra højtrykssiden udgående "vagabonderende" trykfelter kan nå en større udbredelse i dette område end ved styretappens øvrige omkreds og derved udligne de nævnte kræfter.Through the gap between the guide pin 4 and the bore 6 of the cylinder body 5, pressure medium flows out of the recesses 20 and 21 along the guide pin, which preferably end in the relief notes 24 and 25. The hydraulic main forces acting on the cylinder end acting on the high pressure side are offset in the substantially at hydrostatic fields in the region of recesses 20 and 21 and shutter ribs 30-33. However, there are also forces in the displacement direction of the curve path, which depend on the set eccentricity. Since the relief notes according to the invention are interrupted at the inner dead center IT, wherein the aforementioned forces act, the technical effect is obtained that the "vagabonding" pressure fields emanating from the high-pressure side can reach a greater distribution in this area than at the other circumference of the control pin, thereby compensating the said forces.

35 Som det fremgår af fig. 2, har aflastningsnoterne 24, 25 overalt den samme dybde. De kan f.eks. derved være frem- 4 14863735 As can be seen from FIG. 2, the relief notes 24, 25 have the same depth throughout. For example, they can thereby being produced

OISLAND

stillet ved profildrejning. Ved det indre dødpunkt er aflastningsnoterne afbrudt, og de når frem til i det væsentlige udsparingerne 20 og 21's ender.posed by profile turning. At the internal dead point, the relief notes are interrupted and they reach essentially the ends of the recesses 20 and 21.

I fig. 3 er det vist, at aflastningsnoterne, der nu 5 er betegnet ved 24' og 25', også kan være excentrisk udformet på en sådan måde, at de er afbrudt i området ved det indre dødpunkt.In FIG. 3, it is shown that the relief notes, now designated 5 at 24 'and 25', may also be eccentrically shaped in such a way that they are interrupted in the region at the inner dead center.

##

DK44880A 1979-02-02 1980-02-01 RADIAL PISTON MACHINE DK148637C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19797902865 DE7902865U1 (en) 1979-02-02 1979-02-02 RADIAL PISTON MACHINE
DE7902865 1979-02-02

Publications (3)

Publication Number Publication Date
DK44880A DK44880A (en) 1980-08-03
DK148637B true DK148637B (en) 1985-08-19
DK148637C DK148637C (en) 1986-04-28

Family

ID=6700676

Family Applications (1)

Application Number Title Priority Date Filing Date
DK44880A DK148637C (en) 1979-02-02 1980-02-01 RADIAL PISTON MACHINE

Country Status (5)

Country Link
JP (1) JPS55104581A (en)
DE (1) DE7902865U1 (en)
DK (1) DK148637C (en)
FR (1) FR2448051A1 (en)
GB (1) GB2043162B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62126577U (en) * 1986-01-31 1987-08-11

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2239757A1 (en) * 1972-08-12 1974-02-21 Bosch Gmbh Robert RADIAL PISTON MACHINE
DE2248316C2 (en) * 1972-10-02 1985-06-13 Robert Bosch Gmbh, 7000 Stuttgart Radial piston machine
IT993477B (en) * 1972-10-02 1975-09-30 Bosch Gmbh Robert RADIAL PISTON MACHINE
DE2254751B2 (en) * 1972-11-09 1980-06-19 Robert Bosch Gmbh, 7000 Stuttgart Radial piston machine
DE2303108A1 (en) * 1973-01-23 1974-07-25 Bosch Gmbh Robert RADIAL PISTON MACHINE
DE2424284C2 (en) * 1974-05-18 1986-02-20 Robert Bosch Gmbh, 7000 Stuttgart Radial piston machine (pump or motor)

Also Published As

Publication number Publication date
FR2448051B1 (en) 1983-07-22
DK44880A (en) 1980-08-03
JPS55104581A (en) 1980-08-11
DK148637C (en) 1986-04-28
FR2448051A1 (en) 1980-08-29
DE7902865U1 (en) 1980-07-10
GB2043162B (en) 1982-12-22
GB2043162A (en) 1980-10-01

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