WO2019001963A1

WO2019001963A1 - Method for producing a tilting pad bearing, and tilting pad bearing

Info

Publication number: WO2019001963A1
Application number: PCT/EP2018/065634
Authority: WO
Inventors: Tim Maier
Original assignee: Robert Bosch Gmbh
Priority date: 2017-06-28
Filing date: 2018-06-13
Publication date: 2019-01-03
Also published as: DE102017210973A1

Abstract

The invention relates to a method for producing a tilting pad bearing (10) that is made of an outer body (11) with an outer contour (12) and multiple tilting pads (15 to 17) which are arranged within the outer body (11) in the region of an inner bore (13) and each of which has an inner contour (26). The tilting pads (15 to 17) are connected to the outer body (11) via connection elements (19). The method has at least the following steps: - separately producing the outer body (11) and a pad body (22) for the tilting pads (15 to 17) or the tilting pads (15 to 17) themselves, - connecting the pad body (22) or the tilting pads (15 to 17) to the outer body (11) by means of the connection elements (19), - forming the outer contour (12) on the outer body (11) or forming the inner contour (26) on the pad body (22) or the tilting pads (15 to 17), and - forming the inner contour (26) on the pad body (22) or the tilting pads (15 to 17) or the outer contour (12) on the outer body (11) while taking into consideration the previously formed inner contour (26) or outer contour (12).

Description

description

METHOD FOR PRODUCING A KIPSEEGMENT BEARING AND KIPPSEGMENT BEARING

State of the art

The invention relates to a method for producing a tilting pad bearing, a tilting pad bearing and an arrangement with at least one tilting pad bearing.

From the prior art are two fundamentally different

Manufacturing method for Kippsegmentlager known, wherein the Kippsegmentlager each consist of an annular outer body and with respect to the annular outer body radially inner Kippsegmenten, and wherein the Kippsegmente on the side facing away from the outer body one each

Having inner contour which cooperates with a shaft to be stored. In the first manufacturing method, the tilting pad bearing is made of a one-piece or monolithic body, wherein the individual

Tilting segments by forming columns or free spaces from the

monolithic body be released or trained. The pivotable mounting of the tilting segments on the outer body is in each case via a web-shaped connection region which connects the tilting segment (monolithic) with the outer body. The formation of the gaps or clearances for forming the tilting segments takes place, for example, by wire eroding, so that very small gaps between the outer body and the tilting segments can be realized. This also results in a relatively good heat transfer at a heat development in the region of the tilting segments to the outer ring.

The disadvantage here is the relatively high production costs, since the wire EDM takes a relatively long time to form the Kippsegmente to complete, and thus per unit of time only relatively few Kippsegmentlager can be produced. In addition, alternatively multipart formed Kippsegmentlager are known in which the Kippsegmente made of separate components be arranged tilting or pivoting within a likewise separately manufactured (annular) outer body. A disadvantage of this

Manufacturing method of Kippsegmentlagers it is that one of the storage of a shaft serving inner contour of the tilting segments due to the tolerance chain of the various components only very difficult with high accuracy in μπ

Range is producible. Furthermore, this principle of the formation of Kippsegmentlagers reaches its limits when it comes to an exact position of the shaft. Also, in the latter manufacturing method usually relatively large radial gaps between the tilting pads and the outer body are present, so that the heat transfer or heat dissipation from the region of the bearing is relatively unfavorable.

Disclosure of the invention

The inventive method for producing a Kippsegmentlagers with the features of claim 1 has the advantage that it is a very accurate training serving as a shaft bearing inner contour of the

Tilting segments and thus allows the storage of waves, the method also allows an economically advantageous, associated with relatively low cost and expense production of Kippsegmentlager. In addition, it offers the possibility of a very good heat dissipation from the

Bearings of the tilting segments by relatively small gap to the outer body.

The manufacturing method according to claim 1 of the invention is based on the idea of separately producing the outer body and the tilting segments, similar to the above-mentioned second prior art production method, subsequently connecting the outer body and the tilting segments by separate connecting elements, and only then the outer contour on the outer body, as well as the

Form inner contours on the tilting segments, wherein the respective Außenbzw. Inner contour takes place in each case taking into account (clamping) of the previously formed inner or outer contour. Because the relevant contours (outer contour on the outer body and inner contours on the

Tilting segments) in each case depending on the contour formed first takes place, in particular a highly accurate, concentric arrangement of the contours to each other is possible.

Advantageous developments of the method according to the invention for producing a tilting pad bearing are listed in the subclaims.

To a simple and accurate production of the inner contours to the

To allow tilting segments, it is provided in a preferred embodiment of the method that the Kippsegmente are formed on a monolithic, in particular annular segment body, and that the Kippsegmente are formed after forming the inner contours for the Kippsegmente by radial separation of the segment body. Such a design of Kippsegmente, in which this for

Forming the inner contours are arranged on a common segment body, in particular, allows the corresponding

Segment body particularly good and easy to position or clamp and thus, for example, the grinding process to form the inner contours to perform particularly simple and effective.

To allow between the inner contours of the tilting segments and the outer circumference of the shaft in the bearing area a narrowing in size radial or bearing gap, so that form a pressure cushion between the inner contour of the tilting segment and the outer circumference of the shaft when using, for example, a gas as a lubricant can, it provides a further preferred embodiment of the manufacturing process that the

Connecting elements are added under elastic bias to the outer body and the tilting segments or the segment body, so that the tilting segments after the radial separation of the segment body to

Tilt training or separation of Kippsegmente. This makes it possible to form the inner contours for the tilting segments on the segment body by a single radius or grinding process. After the segment body has been separated to form the tilting segments, they are tilted around the connecting elements, so that a shaft is formed in the shaft to be supported

Circumferential narrowing (bearing) gap results. In order to connect the connecting elements with the tilting segments or the annular segment body and the outer body firmly and securely, in particular non-positive or cohesive connections come into question. For example, it is conceivable to produce by appropriate fits clamping connections between the connecting elements and the outer body and / or the Kippsegmenten, or eg by means of additional elements the

To fix fasteners in the area of the outer body, for example by screws, pins or similar. Elements. Alternatively, the

Connecting elements also by solder joints or the like on

External body and / or the tilting segments are fixed or fixed.

In a particularly preferred embodiment of the connecting elements, which on the one hand has a high reliability and life of Kippsegmentlagers, and moreover allows easy handling, ease of manufacture and relatively low cost of the fasteners, it is envisaged that the connecting elements are designed as sheet metal strips, and in that the sheet-metal strips are arranged in (perpendicular to) end faces of the outer body and of the tilting segments (receiving) slots. As already explained above, it is in particular for the formation of a

corresponding lubricant film or gas cushion between the

Inner contours of the tilting segments and the outer circumference of the shaft in the storage area essential that the inner contours of the tilting segments with respect to a longitudinal axis have a preferably continuously changing distance or narrowing radial gap.

If the tilting pad bearing is used, for example, in waves, which are preferably rotated in a single direction of rotation, it may also be advantageous if the connecting elements are arranged viewed in the circumferential direction of the tilting segments off-center.

The invention also includes an arrangement with a Kippsegmentlager invention described so far and a cooperating with the inner contours of the Kippsegmente shaft. Preferably, such an arrangement is adapted to a gaseous medium as a lubricating medium between the outer circumference of the shaft and the inner contours of To use tilting segments. Especially with gaseous media as a lubricant, it is possible that very small (radial) bearing gaps between the shaft and the inner contours of the tilting pads are formed.

Thus, it is a further preferred embodiment of the arrangement, therefore, that the bearing gap between the shaft and the inner contours of the

Tilting segments less than 10μηι amounts. Such a design makes it possible, even with relatively low pressure of the gaseous medium

Pressure pad between the inner contours of the tilting pads and the

Form outer circumference of the shaft.

Further advantages, features and details of the invention will become apparent from the following description of preferred embodiments and from the drawing.

This shows in:

Fig. 1

to

Fig. 6 in a simplified plan view, the preparation of a

Kippsegmentlagers invention during different production steps.

The same elements or elements with the same function are provided in the figures with the same reference numerals.

FIG. 6 shows an arrangement 100 with a tilting-pad bearing 10, which serves for the rotatable mounting of a shaft 1 shown only in FIG. 6 about its axis of rotation 2. In this case, a bearing gap 5 of preferably less than 20μηι is formed between the tilting pad bearing 10 and the shaft 1 when using gas as a storage or lubricating medium. The

Tilting pad bearing 10 consists of an annular outer body 1 1 with an exemplary circular or round outer contour 12 and a plurality, for example three, radially within an inner bore 13 of the

Outer body 1 1 arranged tilting segments 15 to 17, wherein each of the tilting segments 15 to 17 formed with a metal strip 18 as Connecting element 19 is connected to the outer body 1 1 to allow an elastic tilting of the tilting segments 15 to 17 to the outer body 1 1 in the plane of the metal strip 18. The production of the tilting pad bearing 10 is based on the figure sequence of FIG.

1 to 6 is explained as follows: According to FIG. 1, the outer body 1 1 is first produced in a first manufacturing step with the inner bore 13 and three substantially radially arranged slots 21, wherein the slots 21 preferably over the entire height of the outer body 1 1 formed perpendicular to the drawing plane of the figures. Furthermore, the

Tilting segments 15 to 17 formed by an annular

Segment body 22 is produced, in which the three tilting segments 15 to 17 viewed in the circumferential direction initially connect directly to each other or in which the tilting segments 15 to 17 are monolithically connected to each other. On the segment body 22 are also slots 23 also for

Receiving the metal strip 18 and connecting elements 19 are formed, which also preferably extend over the entire height of the segment body 22.

Subsequently, according to FIG. 2, the segment body 22 is positioned radially inside the inner bore 13 of the outer body 11, such that the slots 21 of the outer body 11 and the slots 23 of the segment body 22 are aligned with one another. In this case, a radially circumferential gap 25 is formed between the outer contour 24 of the segment body 22 and the inner bore 13 of the outer body 1 1.

Thereafter, according to FIG. 3, the outer body 1 1 with the

Segment body 22 connected by introducing the metal strip 18 into the slots 21 and 23. It can be provided that the metal strips 18 are mounted under elastic bias. In this case, the slots 21, 23 in the assembly of the metal strip 18 in the circumferential direction are slightly offset or tilted to each other.

Then, according to FIG. 4, the forming of the outer contour 12 takes place by way of example, in particular by grinding. After the outer contour 12 has been produced (with high precision), according to FIG. 5, an inner contour 26 is then formed on the segment body 22 by way of example. In the event that the metal strips 18 were not arranged under elastic prestressing between the slots 21 and 23, the formation of the inner contour 26 on the segment body 22 is effected in particular by forming an inner contour 26 which is parallel to the axis of rotation 2 in an area. which then each forms a tilting segment 15 to 17, a

Has continuously changing distance, in particular such that the distance between the inner contour 26 of the respective tilting segment 15 to 17 to the rotational axis 2 in the circumferential direction of a tilting segment 15 to 17 as viewed from an end portion of the tilting segment 15 to 17 changes from a maximum value to a minimum value vice versa.

In the event that the metal strips 18 were arranged under elastic bias in the slots 21 and 23, it is also conceivable in particular to form a single circular inner contour 26 on the segment body 22, which possibly simplifies the grinding process.

In addition, it is mentioned that it is also conceivable to arrange the metal strips 18 under elastic prestress between the slots 21 and 23 and to form the inner contour 26 with a varying distance from the axis of rotation 2, as explained above.

Finally, as shown in FIG. 6 by radial separation or

Forming slots 28 in the region of the segment body 22, the individual tilting segments 15 to 17 formed from the segment body 22. In the event that the metal strip 18, as explained above, were introduced under elastic bias in the slots 21 and 23, tilt after forming the slots 28, the tilting segments 15 to 17 such that a changing distance between the inner contours 26 of the Kippsegmente 15th to 17 to the rotation axis 2 sets.

The method described so far can be varied in many ways

be modified or modified without departing from the spirit

departing. Thus, it is conceivable, for example, in modification of the above-described facts, first the inner contour 26 on the

Segment body 22 and then only the outer contour 12 on the Form outer body 1 1. It is also conceivable that for the formation of a bearing gap which changes or reduces relative to the shaft 1

Sheet metal strips 18 are first introduced without elastic bias in the slots 21 and 23, and that the Kippsegmente 15 to 17 after the

Forming the slots 28 are then pivoted about the metal strip 18, wherein a plastic deformation of the metal strip 18 by

Heat treatment and reduction of stresses in pivoted

Tilting segments 15 to 17 takes place.

Furthermore, it is mentioned that it is for the supply of lubricating medium,

may be required in particular gas, Zuführbohrungen o.ä. Form geometries in particular in the region of the tilting segments 15 to 17, as is known per se from the prior art and therefore not shown or explained in the context of the description. Advantageously, such geometries or bores are already generated in the context of the production of the segment body 22, but they can also be formed later.

Finally, it is mentioned that the production of the tilting segments 15 to 17 has been described on the basis of an integrally formed segment body 22, from which the individual tilting segments 15 to 17 have been produced by forming the slots 28. It is, however, in principle within the scope of the invention also possible to dispense with such a segment body 22 and to produce the tilting segments 15 to 17 individually. The tilting segments 15 to 17 are then connected to the outer body 1 1 on the metal strip 18. Subsequently, the inner contour 26 is formed on the tilting segments 15 to 17.

Claims

claims

Method for producing a tilting pad bearing (10), comprising a

Outer body (1 1) having an outer contour (12) and a plurality within the outer body (1 1) in the region of an inner bore (13) arranged Kippsegmenten (15 to 17), each having an inner contour (26), in particular consists thereof, wherein the Tilting segments (15 to 17) via connecting elements (19) are connected to the outer body (1 1), and wherein the method comprises at least the following steps:

Separate production of the outer body (1 1) and a segment body (22) for the Kippsegmente (15 to 17) or the Kippsegmente (15 to 17) connecting the segment body (22) or the Kippsegmente (15 to 17) with the outer body (1 1 ) by means of the connecting elements (19) forming the outer contour (12) on the outer body (1 1) or

Forming the inner contour (26) on the segment body (22) or the tilting segments (15 to 17)

Forming the inner contour (26) on the segment body (22) or the tilting segments (15 to 17) or the outer contour (12) on the

Outer body (1 1) taking into account the previously formed inner contour (26) or outer contour (12)

Method according to claim 1,

characterized,

in that the tilting segments (15 to 17) are formed on a monolithically formed, in particular annular segment body (22), and in that the tilting segments (15 to 17) are formed after the inner contour (26) has been formed by severing the segment body (22).

Method according to claim 2,

characterized,

in that the connecting elements (19) are joined under elastic pretension to the outer body (11) and the segment body (22) so that the tilting segments (15 to 17) tilt after the segment body (22) has been severed. Method according to one of claims 1 to 3,

characterized,

in that the connecting elements (19) are connected to the outer body (11) and / or the tilting segments (15 to 17) or the segment body (22) by means of a non-positive or material-locking connection.

Tilting pad bearing (10), produced by a method according to one of claims 1 to 4,

characterized,

in that the connecting elements (19) are designed as sheet metal strips (18), and in that the sheet metal strips (18) are perpendicular to end faces of the

Outer body (1 1) and the tilting segments (15 to 17) extending slots (21, 23) are arranged.

Tilting pad bearing according to claim 5,

characterized,

that the inner contour (26) with respect to an axis (2) a

preferably has continuously changing distance.

Tilting pad bearing according to claim 5 or 6,

characterized,

the connecting elements (19) are arranged eccentrically in the circumferential direction of the tilting segments (15 to 17).

Arrangement (100), comprising at least one tilting pad bearing (10), which is formed according to one of claims 5 to 7 and one with the

Inner contours (26) of the tilting segments (15 to 17) cooperating shaft (1),

characterized,

in that the arrangement (100) is designed to use a gaseous medium as the storage medium between the outer circumference of the shaft (1) on the inner contours (26). Arrangement according to claim 8,

characterized,

a bearing gap (5) between the shaft (1) and the inner contours (26) of the tilting segments (15 to 17) is less than 20 μm.