DE2031091A1 - Hydraulic piston engine - Google Patents

Description

• K.-ING. EUGiN MAIEX

PATENT ADVOCATE

7STUTTOAtT-I WERASTRASSE 24 TELEPHONE 242761/2

A 11 068

22 ο June 1970

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AB Hägglund ft Söner,

Hydraulic piston engine

The invention relates to a device for compensating for a force exerted on the piston of a hydraulic piston engine perpendicular to the direction of movement of the piston, which comes from the pressure exerted by the guide path on the piston rollers to the premature wear of the

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June 22, 1970

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A 11 068 - 3 -

June 22, 1970

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According to an advantageous further development of the object the invention are provided in the piston bores through which the sealing ring receiving the annular groove with connected to the pressure-relieved end face of the piston

In the drawing öind some exemplary embodiments of the The subject matter of the invention presented in a schematic manner ο Ss «peculiar

FIG. ₀ 1 is a side view of a partially cut-away piston;

FIG. 2 shows a vertical section through a piston arranged in a cylinder near the section line H - II in FIG. 1; FIG.

Fig. 3 is a plan view of the piston according to Figs. Ί and 2;

4 shows a further exemplary embodiment of a piston arranged in a cylinder;

b shows a plan view of the piston near FIG. 4;

009 884/15 0 * 7

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k 11 068 - 4 -

June 22, 1970

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reu both Sai®n fib @? flem Eolifeea 1 © «nt learn Una« ag © Cylinder lneretelieme on the feelfiea Bnfiesi ti © Aefese is a rope attached each, iäi © Ib Ifotorgeiilae® provided I On the other hand eiaaaäer

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awieÄalb the cylinder g © lajs |] pa _e you wide © ii © ii © F deepening is about the HSlfft® tee of the which encircles the bore 12 on the opposite sideÄÄeÄ Kentem _f Me "which © from Fig _o siel & tlioh is ο Bi © both fertiefeagea liegem su the geo ^ @ ffls @ teB Äeltee der Bohmog 12 ₉ «β Solben-acting Eippioneai ei venaeiflea · .upper part»

0Q9884 / 1507 " ⁵ ^

A 11 068 -5

22.6o1970

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two wells is an annular groove 16 for receiving one Sealing ring 24 is provided, which seals the depressions 14 and 14 'from the high pressure cylinder roughness 11 above the piston. Above the hanging groove 16 are two elongated peripheral recesses 18 and 18 * provided, which are connected to the recess 14 and 14 'via channels 20 and 20 *

When the engine is in operation and the end face of the piston 10 is exposed to the pressure of the high-pressure liquid which acts on the chamber 11, the piston is pushed to the side opposite the contact surface between the lobes and the guide track _o this pressure is caused by the fact that a force is exerted on the rollers on one side due to the interaction of the rollers and the guideway. This means that the piston on the side on which it is pressed against the cylinder wall is worn out prematurely. To counteract this pressure caused by the transverse force, the indentations via the channels 20 and 20 * cross over with the peripheral recesses 18 and 18 ° connected, so that the high pressure prevailing in the chamber 11 is partly in the relevant recess

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22,6,1970

On the opposite side of the piston flange the gap 21 widens, so that the influx of pressure fluid through the recess 18 and the channel 20 into the The recess 14 is diminished below the recess 14 on the same side as the gap 23 between the surface of the KpI beneath and the cylinder plane wall, so this generally follows the increased flow resistance, the pressure in the depression 14 Ie interaction of this narrowing of the gap 23 and the extension of the gap 21 renovated. Due to the pressure reduction on the gleloh side in the recess 14 * there is an automatic centering of the piston la des Cylinder, as the higher pressure is always in the depression on is built, which has the smaller distance from the cylinder wall, and in which on the opposite side » te arranged well the pressure is relieved · The

en Changes in column 21 and 21 'affect the senses an automatic correction of the lateral displacement of the piston in the cylinder «As a result of the means of the you» tion ring 24 caused sealing of the under high pressure standing chamber 11 of the cylinder opposite the one below of the sealing ring 24 located cylinder space, can see in the depressions 14 and 14 'each sin the centering of the piston causing Druok eel

009884/1507

A 11 068 - 8 -

22 * 6.1970

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As a result of the arrangement of recesses 14 and 14 * arranged on opposite sides of the piston, the piston is centered even when the piston engine is not rotating in the counterclockwise direction The above shows the arrangement of a single indentation MSg ₉ because a transverse force is always exerted in the same direction on the piston due to the interaction of the lobes with the guideway.

4 to 7 is a further exemplary embodiment of the invention shown. The piston differs from the piston of the above-described embodiment rungsbelsplels only in that the end face of the piston is connected to the annular groove 16, so that in this the same high pressure prevails in the chamber 11 _o in the Ausführungsbelspiel according to Fig. 4 "ad 5, this compound is caused by grooves 25 in the outer surface of the piston and in the embodiment of FIGS. 6 and through bores 26, of the End face of the piston starting from la piston head are provided.

The meaning of these connecting channels is given as an example

0098 8 k / 1507 _ ₉ "

A 11 068 ■■ '■■■ - 9 -

22.6.1970

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the Pig «6 and 7 are explained. If the connection lines 26 were not present, the flow to the peripheral recess 10 would be the same as the pressure-related _{flow rate Q 1} reduced / the flow rate Q _{2 of} the displacement flow flow directed relative to the piston from the recess 18 would be the recess 18 downward moving piston moves downstream. Here, the flow conditions are viewed from the moving piston and not from the stationary cylinder. They should only be viewed immovably in the sectional plane shown in FIG. 7 and with respect to the piston. Seen tangentially, they are limited by the width of the recess 18.

Through the surface dc struaende liquid tightness Q _d _ _c is in accordance with the above considerations equal to Q ₁ - * when the seal ring 24 causes vollkoaeene sealing Q ₂ or Undlohthelt as small 1st that the leakage loss can be ignored, ie, when the The amount of liquid flowing through the cross-section is the same. Hull is. From this it follows that the south

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009884/150 7

A 11 068
June 22, 1970
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Be is now guaranteed in the iem same Bmtek KolbenetiiÄflS © li® _e s @ Stollt esss the Selbstiseatrteieiaig ETSS * »* acts te® in or Btehrero ticket druckkaaer 11 nit of 25 are in

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009884/150

Recess 18 flowing Filseigkeitoseage in the f ersohiebeetroa exactly as gsoB IeIi as I © f Btmm of the pressure-related plüaei ^ eiteati ^ iBuag "Bies means; that there is no self-centrationMg tea is only then that case ₉ conditions are fulfilled *? uSalieli vena- the push rod. equality stroiies is © .SebälS ü <bt Kfflllsa © a langt is n & d his starts

203109t

A 11 068 - 11 -

June 22, 1970

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struat "is equal to the" amount Q ₁ -Q ₂ + Q, 4- Q-. Since the amount dee Versohlebeetroaes Qg above the recess 18 of the same ngherungsveiee Tersoliiebestro · Q ^ below the recess 18 is so obtained ₉ "at for Q ^^ the amount Q ₁ + Qm. From this it follows "that" depending on the OrOBe of the Tero-hiebestroas, every time a certain fluid attack occurs in the recess 18. The same considerations apply to the recess 18 * on the opposite side of the piston.

009884/1507

Claims (1)

A 11 068 - 12 - June 22, 1970 - there Expectations 1J device «sun balancing one on the piston one s — p ) hydraulic piston engine transversely to its movement direction of movement acting force »thereby ge * knows that in the wall surface of the piston (10) there is at least one recess (14 »14 *) which is provided over a channel (20» 20 *) with a The peripheral recess (18, 18 *) is connected to the side of the piston (10) on the opposite side of the recess (14 »14 *) on its front face ttafang «wipe the druok-insulated face and an annular groove resting on a sealing ring (24) * (16) arranged 1st. 2 · Device according to claim 1 »characterized in that at the flange of the piston (10) two opposing depressions (H, 14 *) and corresponding recesses (18 »18 *) connected to the depressions are provided. - 13 009884/1507 A 11 068 - 15 - June 22, 1970 - dp 3 · Device according to claim 1 or 2, characterized gekennaei oh η et »that the sealing ring (24) receiving the Hingnut (16) via aa Kolbeuantel gate-seen elongated grooves (25) or bores (26) with the pressure-relieved end face of the piston (10) is in connection 00988A / 1507