DE1528959A1 - Displacement machine - Google Patents

Description

V / cl / Lra -RNiv 8335
Qo 2 ο 1965

Attachment to
Patent-

SRT BO SCH GMBII, Stuttgart W, Breitacheldatraaaa

Displacement machine

The invention also relates to a displacement machine designed as an alum pump or motor and having in particular two intermeshing gears whose shafts are provided with lubricating grooves Bearing bores are guided by bearing bodies, aÄ their The planar surfaces facing the gearwheel flanks are arranged as recesses, which, starting from the annular grooves formed on the mouths of the bearing bores, lead to the leather pressure boit.

For high-latungis gear pumps or motors with sliding bearings

009827/0274 ""

Robert Bo a oh GmbH Wd / Ljn R.lir, 8335

Stuttgart. · .8.2 * 1965-

special attention must be paid to bearing lubrication, if inadmissibly high bearing wear or the peak tear the gear shafts should be rented,

It is known that the engagement between the tooth flanks two engaged teeth of a displacement machine pressed together and not discharged into the pressure line Pressure medium, 30g. "Squeeze oil", offset by the pressure side To guide grooves in the upper and lower part of the housing to the plain bearing spaces and to use them for bearing lubrication. This kind the lubrication is known as "Quetschölschmieruhg". she has den llachfceil that the pressure medium conveyed into the camp is dem Pörderafcroin is lost and contributes to the efficiency to reduce.

It is also known to arrange a plurality of twist groove on each other in the bushing bore receiving the yokes of the gears and to provide a bore starting from the low pressure outside of the track wheels / elle axes voxvläuft parallel au döii V and through a transverse bore au a lying at ■ d'Illusion shaft ends room _s leads Ln to the Dralimiten open, Dieao terminate at the opposite lay-ends, so the gears facing Bohrungoenda in a 'small ring = ·, Only from which recesses open out, which however open out into the low pressure space =, The rotating shafts create a pressure in cooperation with the internal grooves from the low pressure side through the open bore, the spiral grooves and the recesses back The downward pressure position, which created the bearing lubrication, is particularly disadvantageous in this design because the twist groove is in a relatively large area of the position ingestion, which is lost for the formation of the hydrodynamic lubricating film. Therefore, external; Radial forces, which cause the drive wheel to shift in the direction of the swirl = groove, lead to premature failure of the pump. .

009827/0274 _ ₃ .-.

. BAD OBSGINAL ^J

Robert Bosch GmIiH Wd / Lm R ₀ Kr ₀ 8335

Stuttgart. OcSc1Q65

The basis of the invention is the task, a force of repression to create simple structures, ti ο i the lubrication tier the Shafts of the displacement body receiving bearings are particularly effective is formed and the sliding surfaces themselves are retained ο

This is achieved according to the invention in that the Tooth flanks facing away from the flat surfaces of the bearing body each one per se known groove space that connects the two bearing bores with one another is arranged, and that / starting from each hat space Channel penetrates the bearing body and the gears to de osen facing plane surface opens in an area that is opposite an imaginary straight line connecting the centers of the bearing bores to the low pressure cooite is Veraetat *

The solution according to the invention still has the advantage of being permanent the lubrication no pressure medium is lost, which is has a positive effect on the efficiency of the machine «

With regard to the example of the 15rl'indunstigeeunBta, ndso is in the is reproduced. It owns

1 a longitudinal section through a Zalmradmaa machine length der'Linie 1 * 1 der. Fig. 2, "

Fig. 2 is a section along the line II-II of the Pig. 1 _{ Fig. 3 a section along the line III-III of Fig. 2-4 "a bearing body of a-further iiuaführungabeiijpieln

The gear unit comprises a housing body 10 having a aur in cross section about 8-förmigen'Ausnehmung 11 receiving bearing bodies T2 _T .13 and of gears 14 "15 _s the shafts 16 _f 17 in Lagerbohrungon 18, 19 of linken'Lagerkörpers 12 and 20 , 21 of the right bearing head 13 are mounted, /, among other things, the housing body 10 also receives a Zv / ischeiiplatte- 24, which rests against the bearing body 12 with a metal seal and the outline of which corresponds to that of the bearing body. 12, 13-. eöteprieht, as it is particularly clearly visible in FIG. It has a bore 25 'in the axial port of the gear shaft 17 and in the

009827/0274

Robert Bosch GmbH Wd / Lm H.Hr. 8335

Stuttgart 8th February 1965.

a hole 26 c

Me both end faces of the housing body 10 are ground and lapped. Against the ones in Pig. 1 right end face 30 lies on the anachlußseite housing wall 31 and against the left end face 32 is oino antrißbsßseite.e housing wall 33 in each case with a metallic seal. These parts are secured by screws, not shown. is held together "

In the aneohlußßoitigo housing wall 31 aind two Ans ohlußrera ohrau-Imngen 34 »35 brazed in, those for supplying and removing pressure medium serve »Übor bores 36 and 37 are in the housing wall 31 Pia with. Recesses .38 and 39 divided into recess 11 au connection j. the au the meshing points of the gears 14, 15 l'huuen and aich about the combined width of the housing body » οstretch "

The drive wall "Gohäuoewand" 33 contains a bore 40 for leading through the V / elle 16 and kw? Receiving o-iner Weliendlchtung 41 o i-.Uijaerdom ■ di-ont the housing and 33 for receiving elastic l) ichtelc.menten _f which, together with the v / ischenplatte 24 - which also compensates for length tolerances in the construction of the gear wheel machine - delimit the axial pressure fields acting on the bearing body. The shape of these elements and the creation of the pressure fields, however, are not to be described further here, as they do not belong to the essence of the present invention.

At the side facing the housing wall 31 end face of the bearing body a DIE beiden.-bearing holes 20, 21 communicating groove 44 is formed aua ° at which the Zv / iechenplatte 24 facing the plane surface of the bearing body 12, a cap 45 _for connecting the two bearing bores and connects 19 . A longitudinal groove is machined into each of the bores 18, 19, 20, 21, which is designated by one of the reference numerals 46, -47 * 48 ₅ 49, and which is located in one of the bores.

009827 / 027Λ. - 5 -

Robert Bosch GmbH 7d / lm R ₀ No. 0335

Stuttgart 8 * 2.1965 '

at the lying small annular groove 50 "" 57 ends. I) Is Länganuten jliegon also at opposite points of the bearing bores, that is, at 8bellen in which during operation of the M _a achlne only low pressure forces the V / Ellen to occur.

On the flat surface of the bearing body facing the gears 12 Is a relatively large amount, but not very deep Recess 58 incorporated, each of one of the Lagarbohrtmgen 18j 19 surrounding annular grooves 51 * 53 goes out and at the recess 38 ends (low pressure side) «,.

On the flat surface of the bearing body 13 directed towards the gears, there is arranged a recess 59 of the same type, which extends from the two annular grooves 54, 56 surrounding the bearing bores 20, 21 and also) on the recess. 38 ends. BIe inner delimitation lines. .60, 61 of these recesses "run in front of the. Recess 38 laterally verse fca-t opposite an imaginary plane connecting the middle of the bearing bores" starting from the area "between the boundary lines oo, 61 of the assumptions 58, 59 and the imaginary connecting plane of the Aöhoan der Lagei'bohrungsn and somewhat laterally offset zvioinander penetrate -Each two parallel bores on the Lagerbohrunson running on the bearing body 12, 13. Biesa bores and on the bearing body with 62 and -63 and both open into the groove 45 ■> Until the corresponding bores on the bearing body 13 are aligned with u4 and 65 '■ be «and both open into the groove; 44ο The lateral offset of the bores 62> 65 iafc so baiaerjseri., That tiio boreon within the ICo-pfkröloe der Zalmrädei * lie, doii. the mouths of the bores - lie in the boron the ZahnlUekon, - in which a pressure deviating from the pressure of the Ausnehraung '38' arises during operation 58, 59 do not touch this area »

In operation as a pump shaft 16 in Pig * im.Uhrzeigersinn 1 seen from the left is driven by .the .If the AnschlusBverschraubung34 _i Bohrung.3-6 and the recess 38

009827/0274; * ad orig.nal " ^β """

Robert Boaßh GmbH Wd / Lm IUNr. 8335

Stuttgart 'February 8, 1965

Pressure medium sucked in, from the rotating Zahnrädarn 14, 15 In a known orphan under pressure gaaetzt- and through the recess 39 _? the bore 37 and the screw connection 35 to the internal consumer. At the point where a tooth that is just still in engagement emerges from the tooth gap of the opposing radea, a negative pressure is created by increasing the volume of the tooth gap. In the zahnraflaeibigen mouths of the holes 62 to 65 therefore also entatehb a vacuum "This vacuum is to .Zustandekommen * a proper bearing lubrication, a aogonann" th "Saugschmierung ¹¹ used J) or the following procedure should einfachheibohalber be gösohilderb only on a bearing body since. he works the same way on the other *

as a result of the underpressure created in bores 62 and 63

the Lagerkürpora 12 passes cool Saugöl into recess! 58, and the bearing bores 18 and 19f where · ^ along the zahnrads.eibigen ring Nuber> 1, 53 to au the Lüngonuten 46, 47-flLeast> 13s ate IGT in ύοϊί Iiänganuben high. , - ie »in the direction of dor, ööhäusowaisl 33, whereby oö is captured by the waves» This forms itself. in a known V / oIbq an oil film between the bore and V / elle. At the end of the Längsnuben Saugöl enters into the annular grooves and 5o and from these into the groove 45, into which the bores 62, 6; 5 back open, Üb8i ^v diooe flieöst og again aur Saugselte, Dieaer zwangaläufig taking place-'Ülumlauf'wird alao made possible by the negative pressure in the bores 62, 63. Sr has the advantage that the bearing surfaces are well cooled, because the result is a quite considerable flow of oil. The "longitudinal groove also lie outside the contact pressure area of the gear shafts and only stress a small part of the bearing surface, so that a good" lubricating film is guaranteed at all times ".

- 7th

0098 2 7/027 U

BATH

■■ "7

Robert- Bosch GmbH Wd / Lm 11.Nr ₀ 8335

Stuttgart 3 "2.1965

When the machine is operated as a motor, the pressure medium is high

fed to the connection screw 35 and passes through the bore 37 into the recess. 39 "where it eetat the gears 14, -15 in a known manner under pressure (which now rotate counter-clockwise, seen in Fig. 1 from the left) _f -then into recess 30 »from where ea flows under lower pressure (via lataj into the container«)

Bio bores 62, 63, 64, 65 are now in the area of the closing Zalmkaramern and the oil (Quetach oil) squeezed into the tooth gaps is now used to lubricate the bearing bores. There is no longer any suction lubrication, as was the case in the pump area, but pressure lubrication, in which daa oil takes the most counter-pressure as with the sow *: «lubrication -lease lease. Ztthnlüoken on both sides of the tooth surfaces in the bores 62, 6; bawe 64, 65, the annular grooves 50, 52 and 55, 57, - get into the spaces 44 and 45 _f. along the rotating wool in the Lärgomites döi'Jiaßerbolirungfn, from where co flicfis over the AuanehnrnngGii 5O ₅ 59. aur liiedordruckseite ₍ t. 'On dleae Y / c? i se ■ also disfigured again - a perfect / bearing lubrication » D-vuckmittelverlus te do not distort, because "the squeeze part arises when the engine is running on the Hiederdruokaei.tc

The described bearing lubrication also occurs in a satisfactory manner if one of the laterally offset bores is used (These are the bores on the drive side) »In motor operation, it is exactly the opposite. However, a different bearing body would then have to be installed.

00982 7/02 7 4

BATH ORIGINAL

Bobert Boeoh CtebB - * ά / ΐΑΜ * ΜΪ * Q $$$ Stuttgart "p.2. Wl

In the case of the outer ring plate a · bearing body bearing T fi | «4 see below, that instead of two drilling unfie the bearing body * uoh, a centrally arranged bore is sufficient You ·· let as X 66 and deprecated on the bearing body $ 3 «-It lies in the middle between the bearing bores for the gearwheel shafts, but also offset to the low pressure, and also in the groove space 45. · 'Γ ■ ^j

009827/027

Claims (1)

rt Boach GmbH Wd / Lm R.Nr. 8335 Stuttgart February 8, 1965 Expectations Γ \ '■ ■ 1.1 displacement machine ait designed as a pump or motor, in particular two intermeshing gearwheels, the shafts of which are guided in bearing bores provided with lubrication grooves by bearing bodies, on whose plane surfaces facing the gearwheels are arranged recesses that start from the annular grooves encompassing the mouths of the bearing bores towards the low-pressure side of the Guide machine, characterized in that on the plane surface facing away from the gearwheel of each bearing body (12, 13) at least one known groove (44, 45) is arranged, which each bearing bore (18, 19j 20, 21) with a channel ( 62, 63 j. "64» 65, 66, 67), which penetrates the bearing body and opens into a plane surface facing the gear wheels at a point opposite an imaginary plane connecting the axes of the bearing bores to the low-pressure side (38) is offset and lies in the area in which the tooth gaps generate a pressure that differs from the low-pressure side, while end the recesses of the planar surfaces are separated from this area » Verdrängermaoehine still claim 1 "characterized that the groove (44, 45) connects boit'a hunter bores and ; ■. '- -10 -Q09827 / Q274 BAD O _RlGiNAL 1521959 Robert Böeoh GnbH ¥ i / ie S.I », 833 * Stftt t219 * 9 the channel «in · τοη der courage (44V 45) auegthend ·, de» bearing body penetrating approximately perpendicular to the plane surface atine Bore (66, 67) is at least almost in the center plane between the shaft bores (18, 19; 20, 21), but Is arranged offset low pressure side. 3. Displacement machine according to claim 1, characterized in that that in particular the groove (44, 45) connects both bearing bores and that the channel is made up of two of the Mut (44, 45) * the bearing body approximately perpendicular to »a plane surface penetrating bores (64, 65i € 2, 63) , both of which lie within the tip circles of the gears 009827/0274