阅读说明：本技术 带有增材式制造的结构的滑动轴承 (Sliding bearing with an additively manufactured structure ) 是由 H.韦格纳 于 2020-01-21 设计创作，主要内容包括：本发明涉及一种带有增材式制造的结构的滑动轴承。用于安装轴(2)的滑动轴承(1)带有轴承体(3)和轴承环(4),其由多个斜垫(5)形成,其中,该多个斜垫(5)可倾斜地安装在轴承体(3)上并且与轴(2)的滑动表面(8)形成润滑轴承间隙(9),其特征在于,至少一个斜垫(5)和/或轴承体(3)具有位于内部的至少一个功能性结构用于形成支撑区域(6)。(The invention relates to a sliding bearing with an additively manufactured structure. A plain bearing (1) for mounting a shaft (2) with a bearing body (3) and a bearing ring (4) formed by a plurality of tilting pads (5), wherein the plurality of tilting pads (5) are tiltably mounted on the bearing body (3) and form a lubricated bearing gap (9) with a sliding surface (8) of the shaft (2), characterized in that at least one of the tilting pads (5) and/or the bearing body (3) has at least one functional structure located inside for forming a support area (6).)

1. A plain bearing (1) for mounting a shaft (2) with a bearing body (3) and a bearing ring (4) formed by a plurality of tilting pads (5), wherein the plurality of tilting pads (5) are tiltably mounted on the bearing body (3) and form a lubricated bearing gap (9) with a sliding surface (8) of the shaft (2), characterized in that at least one of the bearing body (3) and/or the tilting pads (5) comprises at least one functional structure located inside for forming a support region (6).

2. A plain bearing (1) according to claim 1, characterized in that the inner supporting area (6) comprises a cavity (7) or cavities (7) or structures (7) which are open to the outside.

3. A plain bearing (1) according to claim 1, characterized in that at least one tilting pad (5) is at least partly produced by additive manufacturing.

4. A plain bearing (1) according to claim 1, characterized in that the bearing body can be produced at least partly by additive manufacturing.

5. A plain bearing (1) according to claim 1, characterized in that the support region (6) has a honeycomb-like structure.

6. The plain bearing (1) according to claim 1, characterized in that longitudinally and/or transversely running support webs are formed in the support region (6), which are preferably connected to one another by connecting webs.

7. A plain bearing (1) according to claim 1, characterized in that the support region (6) comprises an arc-shaped support web.

8. A plain bearing (1) according to claim 1, characterized in that the tilting pad (5) on the outer surface (10) forming the lubricated bearing gap (9) with the sliding surface (8) of the shaft (1) is coated with a sliding layer (11).

9. A plain bearing (1) according to claim 1, characterized in that adjacent tilting pads (5) form between them a gap (12) which is adapted to guide lubricant.

10. Method for producing a tilting pad (5) for a plain bearing (1) according to any one of the preceding claims, characterized in that at least one tilting pad (5) for forming the support region (6) and/or the bearing body is produced by additive manufacturing, in particular by 3D printing.

11. The method according to claim 10, characterized in that the material used for the additive manufacturing of at least one tilting pad and/or the bearing body is metal or comprises a metal component.

Technical Field

The present invention relates to a sliding bearing for mounting a shaft. The sliding bearing may be formed with a bearing body and a single or multiple sliding surfaces, or with a bearing ring formed of multiple tilting pads (tilting pads), and to a method for producing the bearing body and the tilting pads.

Background

Radial and axial sliding bearings are used in different machines for applications in the case of very high rotational speeds or axial loads, for example as tilting pad bearings, in order to take into account the high rotational power requirements. The main applications are turbines, transmissions, turbo compressors, fans and electric motors. In the prior art, the basic geometry of the bearing body and the tilting pad is produced specifically for this purpose by means of cutting methods such as chip machining or spark erosion. In this way, the outer geometry of the bearing body and the tilting pad can be freely configured, but with conventional manufacturing methods it is only possible to adapt the inner geometry to the relevant requirements to a very limited extent and/or at very high costs and processing expenditure. Thus, conventional tilting pads are produced as solid materials with various small balls for positioning and for temperature measurement. Conventional bearing bodies are produced with various holes and functional surfaces.

Disclosure of Invention

It is therefore an object of the present invention to overcome the aforementioned disadvantages and to provide a bearing body or a tilting pad bearing or a method for producing a bearing body and a tilting pad for a sliding bearing for mounting shafts, which withstand high mechanical requirements.

This object is achieved by the combination of features according to claim 1.

According to the invention, a plain bearing for a mounting shaft is therefore proposed, with a bearing body and a bearing ring formed from a plurality of tilting pads. The plurality of tilting pads are tiltably mounted on the bearing body and form a lubricated bearing gap with the sliding surface of the shaft. In addition to this, at least one tilting pad or/and the bearing body has at least one functional structure (in contrast to a solid material) located inside for forming a support region. It is advantageous therein that the new swash pad design or bearing body design provides a partially hollow inner contour provided with at least one special support structure of the swash pad or bearing body, which can also be designed in a highly complex manner. Thus, the bearing damping (bearing damping) is adjustable via the targeted variation of the material damping and the flow resistance of the at least one tilting pad through the pad and the friction process in the tilting pad. Furthermore, the bearing stiffness can be adjusted by a targeted structural stiffness of the support region in the at least one tilting pad and/or the bearing body.

In an advantageous embodiment variant, it is provided that the inner support region has a cavity (cavity) or a plurality of cavities or structures which open out. By forming a cavity or cavities in the internally located support region, the bearing stiffness and bearing damping can be suitably adapted by means of at least one tilting pad and/or bearing body and correspondingly adapted to the requirements of the bearing.

In a further development of the present sliding bearing according to the invention, it is furthermore provided that the at least one tilting pad and/or the bearing body is produced at least partially by additive manufacturing. It is advantageous here if, depending on requirements, the at least one tilting pad and/or the bearing body can be produced completely by additive manufacturing or only the inner functional structure can be added from a blank of solid material, by means of which material, time and production effort can be reduced.

Preferably, the plain bearing is designed such that the support region has a honeycomb-like structure.

In an exemplary embodiment of the invention, it is provided that longitudinally and/or transversely running support webs (webs) are formed in the support region, which webs are preferably connected to one another by connecting webs, so that a special support structure is formed. Instead of forming cavities, it is also conceivable to introduce different materials into the intermediate space (intermediate space) by an additive process.

Furthermore, an embodiment is advantageous in which the support region comprises an arc-shaped support web.

In this way, the functional structure located inside can be adapted quite individually to the respective requirements of the plain bearing. Thus, the different configurations of the support area cover a plurality of application areas and their requirements on the tilting pad and the bearing body.

In a further advantageous variant, it is provided that the tilting pad is coated with a sliding layer on an outer surface, which outer surface forms a lubricating bearing gap with the sliding surface of the shaft. It is advantageous here that optimum lubrication of the plain bearing is ensured by the sliding layer and therefore unnecessary friction losses are avoided.

In one embodiment variant, the plain bearing according to the invention is formed such that adjacent tilting pads form a gap between them which is suitable for guiding a lubricant. In this way, a conventional lubrication of the sliding bearing is ensured during operation.

According to the invention, a method for producing at least one tilting pad and/or a bearing body for a sliding bearing is proposed, with which, in addition, at least one tilting pad and/or bearing body is produced for forming a support region by additive manufacturing, in particular by 3D printing.

Additive manufacturing or 3D printing or layer building by sintering methods offers the best possibility to produce suitable tilting pads and/or bearing bodies, since the production process is only subject to the boundary conditions of the production of additive manufacturing and in this way at least one tilting pad and/or bearing body can be formed correspondingly complex. The accessibility of the tool to the internal geometry no longer has any influence and the at least one tilting pad and/or the bearing body receives the functional structure located inside as required.

Preferably, the material used for the additive manufacturing of the swash pad and the bearing body is metal or comprises a metal component.

Drawings

Further advantageous further developments of the invention are indicated in the dependent claims or are shown in more detail below with the description of preferred embodiments of the invention by means of the figures. Wherein:

figure 1 shows a cross-sectional view of a tilting pad with functional structures located inside,

fig. 2 shows a side view of a plain bearing with a tilting pad with an internal functional structure.

Detailed Description

Fig. 1 shows a sectional view through a tilting pad 5 with an internally located functional structure for forming a support area 6. The inner support region 6 has a plurality of cavities 7, which form a honeycomb-like structure. On the outer surface 10 of the tilting pad 5, it is coated with a sliding layer 11. Along its longitudinal extension, the tilting pad 5 comprises approximately in the middle a transition from the internally located support region 6 to the region in which the tilting pad 5 is formed as a solid material.

In fig. 2, a side view of the plain bearing 1 with the tilting pad 5 with the functional structure 6 located inside is shown. The plain bearing 1 is mounted on a shaft 2. The plain bearing 1 furthermore comprises a bearing body 3 and a bearing ring 4. The bearing ring 4 consists of five tilting pads 5, which are tiltably mounted on the bearing body 3 and in each case form a lubricated bearing gap 9 with a sliding surface 8 of the shaft 2.

At its respective outer surface 10, the tilting pad 5 of the slide bearing 1 is coated with a sliding layer 11. Furthermore, the respective outer surface 10 forms a lubricated bearing gap 9 with the sliding surface 8 of the shaft 1. In addition, the respective cushion blocks 5 adjacent to each other form a gap 12 therebetween. In the region of each gap 12, the bearing body 3 has a recess 13.