DE2147754A1 - DIVIDED SLIDING BEARINGS, IN PARTICULAR MAIN BEARINGS OF A CRANKSHAFT OF MEDIUM AND LARGE ENGINES - Google Patents

Description

Split plain bearings, in particular main bearings of a crankshaft of the central and Large engines

The invention relates to split plain bearings, in particular main bearings of a crankshaft of medium-sized and large engines, such as marine diesel engines, etc., in which the Due to its size and weight, the crankshaft cannot be removed during a repair and therefore a Lagersohalenhhalf between the shaft and the bearing book by turning the shaft out of the bearing seat or into the bearing seat must be turned into. When using fretless, thin-walled bearing bracket has been shown in practice that the bearing bracket half warps, whereby the shelf life is adversely affected.

309813/0618

2U775A

Dipl.-Phys. Heinrich Seidb · Patent Attorney · o2 Wiesbaden · Khcinstr.ilit · Π! ■ P.O. Box 670 ■ Ftfleton 303i 5 ^l ->

The axial fixation of such bearings is also difficult connected, so that a message is often necessary, but this can only be done under difficult conditions.

Bs is "already known for axial and radial fixation the bearing shell half on the shaft, the bearing shell half to be turned in or out at a point of separation with a to train outwardly protruding rabbits, the ingetorneden Condition of the bearing shell half in a corresponding The recess is seated on the bearing seat and the bearing shell half is fixed axially and radially. This prevents However, it does not mean that the bearing shell half warps when turning in or out, and there is still an axial message necessary, as the nose only comes into effect towards the end of the tour. In addition, the bearing shell half can only be kicked in or out in one direction. As a result, it has repeatedly happened that when touring in the wrong direction the nose has been ground off and damaged the bearing shell mount, so that both the The half of the bearing and its receptacle were unusable.

It is also known that turning the bearing shell half on and off with the help of sliding elements guided in guide organs. This is done on the half of the bearing shell a rivet-shaped pin with a rounded or cylindrical

3 0 9 8 13/0618

2U775A

Uipl.-Phy-s. Heinrich Seids · Patent Attorney ■ o2 Wiesbaden · Rhcinstraßc 121 · P.O. Box t> 70 - Telephone 3034

Aryan head arranged when touring in or out is guided in a groove formed on the main bearing mount. However, this cannot prevent that the half of the bearing shell is turned in at an angle, so that relatively large shear forces occur on the pin and this is sheared off. To absorb the shear forces can, the pin must be made with a relatively large diameter, whereby its head guided in the groove becomes relatively large and thus requires a relatively wide groove. However, this has the major disadvantage that already after a short running time the area of the running surface of the bearing shell half located above this groove into the groove deformed into it, which, due to the reduced storage area and the interrupted reshaping, the load-bearing capacity and service life of the storage is significantly reduced.

It is therefore the object of the invention to create a split sliding bearing by means of which these disadvantages are eliminated are, an easy and quick honing allowed, does not warp when turning in or out and no axial Makes news more necessary.

This object is achieved by the invention in that the Gleitele & ent than on the outer circumference of the bearing shell half protruding, elongated narrow element and the guide element as the sliding element essentially free of play

309813/0618

2H7754

Dipl.-Phys. Heinrich Seids - Patent Attorney 62 Wiesbaden Rhrinstrasse 121 P.O. Box 670 Telephone 303459

A narrow hat that extends from the bearing separation point to the bearing separation point in the main bearing base bore By the invention it is achieved that already at the beginning of the turning in and out of the bearing shell half yon the elongated sliding element is guided in the radial g direction and can therefore no longer tilt. the only one required small width of the oil guide element small hat width, so that an impression of the above Kut lying tread area is no longer possible.

In a particularly advantageous embodiment, according to the invention, the sliding element can be formed as a C-shaped narrow bracket that slides in the groove and is angled at its ends and is fastened with its ends in corresponding recesses on the bearing shell half also possible that it GIe element than in the itttt moving, narrow, elongated wedge preferably rectangular cross ψ to form sections and fixing in a corresponding recess on the bearing shell half.

In order to get started at the beginning or until the end of the Austournens the bearing shell half to ensure radial guidance, it is advantageous within the scope of the invention, to arrange the sliding element directly in the area of the bearing separation point on the bearing shell half. Here

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2H775A

Dipl.-Phys. Heinrich Seids · Patent Attorney · 62 Wiesbaden · Rheinstrasse 121 · P.O. Box 670 · Telephone 3034S9

it is possible to provide two or more guide elements on the bearing bracket half. With an arrangement β of two sliding elements can be aligned one behind the other and one sliding element each on the opposite one Separation points of the bearing bracket half be arranged. at an arrangement of two or more sliding elements these can be arranged parallel next to one another on one and the same and / or on the opposing Irennstellen of a bearing shell half.

In the context of the invention, however, it is also possible to use the sliding element as sliding in the hat, formed on the bearing shell half, from bearing collar separating parts to bearing shell separating point Reaching narrow annular bead with a rectangular, wedge-shaped or semicircular cross-section. Here two or more annular beads can be provided as sliding elements

For special bearings, in particular for those with relatively thick-walled bearing shells, it is within the scope of the invention possible, in mechanical reversal, the sliding element or the sliding elements on the main bearing base bore and the sliding element or to arrange the sliding members on the outer circumference of the bearing bracket half.

309813/0618

Dipl.-Phys. Heinrich Seids · Patent attorney ■ 62 Wiesbaden - Rheinstrasse 121 · P.O. Box 670 · Telephone 303459

To prevent rotation of the bearing shell halves when operating the To prevent the crankshaft, it is advantageous according to the invention if the bearing shell half to be turned in or out opposite bearing shell half at their two separation points each with at least one in the Parting line facing outwards, each on the Separation surface of the main bearing receptacle supporting nose is formed. Here are for the inclusion of the rabbits the main bearing mount corresponding recesses formed.

Some exemplary embodiments are described in more detail below with reference to the drawings. Show it:

Figure 1 partially subdivided plain bearing

its assembly;
FIG. 2 the slide bearing mounted; characters

3-6 different embodiments of the

or bearing shell half to be turned

The embodiment shown in Figures 1 and 2 of a split plain bearing according to the invention is one Main bearing of a horizontal crankshaft of a marine diesel engine and is shown in FIG. 1 during assembly and in FIG. 2 after Assembly shown. As can be seen from Figure 1, uird for

309813/0618

2H775A

Dipl.-Phys. Heinrich Seids · Patent Attorney · 62 Wiesbaden · RheinstraEe 121 · P.O. Box 670 · Telephone 303459

Assembly the one bearing bracket half 1 placed on the shaft 12 and entered with the shaft 12, d. H. screwed in. For this purpose, a collar bolt 13 is inserted into the oil hole 14 of the shaft 12 inserted, which with its collar of the bearing shell half

I serves as an abutment. After screwing in the bearing bracket half 1 it is removed again. After twisting or turning the bearing shell half 1, the upper bearing shell half 2 is placed on the shaft 12 and the upper half Part 16 of the main camp recording superimposed. The upper half of the bearing shell 2 has lugs at both separation points

II formed, which are located on the straight parting surfaces of the Support the lower part 15 of the main bearing mount. The upper bearing part 16 is at the appropriate points with these lugs 11 provided receiving extensions. the Lugs 11 thus prevent the bearing shell halves 1 and 2 from rotating during the rotation of the shaft 12.

As already described, the example shown relates to a horizontal »crankshaft. It is all without It can also be seen that the slide bearing according to the invention can also be used with so-called hanging shafts.

For screwing in during assembly or for dismantling to unscrew the lower bearing shell half 1, this is and this receiving part 15 of the main bearing mount in the example shown in Figures 1 and 2 with a

309813/0618

Zl4 7 7 5 4

Dipl.-Phys. Heinrieh Seid «- patent attorney · 62 Wiesbaden · Rheinsstrasse 121 · P.O. Box 670 · Telephone 30 34

Device designed for mutual guiding tu circumferential direction during bin- or exhaustion and for axially fixing the bearing shell half in its end position. This device is formed by an Iieitorgan 3 and, if necessary, several sliding elements 4 which, when turning the bearing shell half 1 in or out, guides it radially and prevents it from being twisted in or out at an angle.

As can be seen from FIGS. 1-6, the guide element 3 - And the sliding elements 4 can be designed differently. Beneficial however, the guide element 3 is a groove with a rectangular, Cup-shaped or semicircular cross-section · It is in the illustrated exemplary embodiments in the Support surface of the bearing shell half 1 receiving part 15 of the Hauptlageraufnähme arranged. The guide elements 4 are in each case on the turn-in or turn-out shell * half 1 arranged.

In the example shown in FIGS the Iieitorgan 3 on which the Iiagerschalenhalen half 1 receiving Part 15 of the main bearing receptacle and designed as a narrow groove with a semicircular cross-section and extends at right angles to the bearing axis from one point of separation to the other «In this example, the sliding element 4 is a narrow, C-shaped bracket 6 on the outer circumference of the bearing shell half 1 in the immediate vicinity of its one separation point

- 9 "
309813/0618

Dipl.-Phys. Heinrich Seids Patent Attorney 62 Wiesbaden Rheinstrasse 121 P.O. Box 670 - Telephone 303459

appropriate. The bracket is cropped at its two ends 5 approximately at right angles and is with these cropped portions fastened in bores 7 on the bearing shell half 1. the The groove corresponds essentially to the width of the bracket 6, so that it can slide in the groove without much handle.

FIGS. 3-6 show further exemplary embodiments of the G-guide elements 4 and their arrangement. They embrace does not cover the entire scope of the invention and can be supplemented by others. In all depicted Examples of the guide member 3 is designed as a narrow groove.

Thus, FIGS. 3 and 4 show an exemplary embodiment in which the narrow groove as shown in FIGS. 1 and 2 Example, in the part 15 of the main bearing receptacle and the sliding element which recesses the bearing shell half 1 4 is designed as a narrow annular bead 11 sliding in this narrow groove. The narrow annular bead 11 is on molded onto the circumference of the bearing shell half 1 and extends from one separation point to the other. The groove and the narrow one Annular bead 11 have a rectangular cross-section, but in other designs it can also be wedge-shaped or semicircular can.

In Figures 5 and 6 is a further embodiment

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30 9 8 13/0618

έ. It / / yJ t

Dipl.-Phys. Heinrich Seids Patent Attorney - 62 Wiesbaden Rheinstrasse 121 P.O. Box 670 Telephone 303459

- 10 -

shown in which the narrow hat in which the bearing shell half 1 receiving part 15 of the main bearing receptacle is arranged and the sliding element 4 than in this narrow groove sliding, elongated, narrow wedge 8 is formed with a rectangular cross-section. Der.Keil 8 is in a pass slot 9 attached to the bearing shell half 1 directly in the region of the separation point.

f from the illustrated examples, it is not apparent that it is possible, depending on the width of the bearing, to the bearing, and this then preferably centrally, or two and a plurality of guide elements 3 with the appropriate G-guide element 4 at a separation point or G -guide elements 4 to be arranged parallel to each other at both separation points.

Claims (10)

2H7754 Dipl-I'hys. Heinrich Seids - patent attorney · 62 Wiesbaden · Rhcinstrasse ΠΙ · P.O. Box 670 · Telephone 3034 5 " - 11 patent claims s ./ Split plain bearings, especially the main bearings of a crankshaft of medium and large engines, for example marine diesel engines and the like, in which during the assembly or disassembly one bearing shell half between each with the help of sliding elements guided in guide elements Crankshaft and main bearing base bore is turned on or off, characterized in that in each case the Sliding element (4) as an elongated narrow element protruding from the outer circumference of the bearing shell half (1) and the Leitorgang as the sliding element (4) substantially free of play receiving, in the main bearing base bore of Bearing dividers, narrow ones reaching to bearing dividers Groove (2) is formed. 2. Plain bearing according to claim 1, characterized in that the sliding element (4) as a iivÄer groove (3) sliding, at its ends (5) angled, C-shaped, narrower Bracket (6) formed, and with its ends (5) in corresponding recesses (7) on the bearing shell half (1) is attached. 3. Plain bearing according to AnspAh 1, characterized in that the sliding element (4) than in the groove (3) sliding, narrower - 12 309813/0618 2H775A Dipl.-Phys. Heinrich Seids · Patent Attorney · 62 Wiesbaden · Rheinstrasse 121 · P.O. Box 670 ■ Telephone 3034 - 12 - angular line (8), preferably rectangular cross-section is formed and fastened in a corresponding recess (9) on the bearing shell half (1). 4. plain bearing according to claim 2 or 3, characterized in that the sliding element (4) directly in the area of the bearing separation point at the etea? Bearing shell half (1) is arranged. 5 .. plain bearing according to one of claims 2-4, characterized in that that two or more sliding elements (4) are provided on the bearing shell half. 6. Sliding bearing according to claim 5, characterized in that when two sliding elements (4) are arranged, these are arranged in alignment one behind the other and each one sliding element · (4) at the opposite separation points of the bearing shell half (1). 7. plain bearing according to claim 5 »characterized in that when arranging two or more sliding elements (4) »these parallel next to each other on one and the same or / and one on the opposite separating parts Lagersohalenhhalf (1) are arranged. - 13 309813/0618 21A775A Dipl.-Phys. Heinrich Seids · Patent Attorney · 62 Wiesbaden · Rheinstrasse 121 · P.O. Box 670 · Telephone 20345 "? - 13 - 8. Plain bearing according to claim 1, characterized in that the sliding element (4) than in the groove (3) sliding on the bearing shell half (1) molded from the bearing shell separation point Narrow annular bead (10) with rectangular, wedge-shaped or semicircular shape reaching to the bearing shell separation point Cross-section is formed. 9. Plain bearing according to claim 8, characterized in that two or more annular beads (10) as sliding elements (4) are provided. 10. Plain bearing according to one of claims 1-9, characterized in », that in mechanical reversal the sliding element (4) or the sliding elements (4) on the main bearing base bore and the guide element (3) or the guide elements (3) on the outer circumference of the bearing shell half (1) are arranged. 11- plain bearing according to one of claims 1 - 10, characterized in that that the bearing shell half (1) to be turned on or off is opposite the bearing shell half (2) at their two separating points each with at least one protruding outward in the separating plane, each is formed on the separating surface of the main bearing receptacle supporting nose (11). 3 Π 9 3 13/0618