Method for producing a component of a sliding bearing, and component, sliding bearing and transmission of a wind turbine

Abstract

A method for producing a component of a sliding bearing includes a) providing a metal bolt with a cylindrical lateral surface and two end faces; b) coating the lateral surface of the bolt with a soldering flux or material; c) providing a metal sheet made of bronze and forming it into a cylindrical sleeve having a longitudinal slot, a first side of the metal sheet forming an inside is coated with a solder material or flux before or after the forming process, the lateral surface of the bolt or the inside of the sleeve having soldering flux; d) sliding the sleeve onto the lateral surface of the bolt; and e) bonding the lateral surface and sleeve soldering. A sliding bearing produced by the method includes the component in a bore of a planetary wheel, and a second side of the metal sheet and planetary wheel are in direct sliding contact.

Claims

1. A method for producing a component of a sliding bearing, comprising the following steps: a) providing a metal bolt with a cylindrical lateral surface and two end faces; b) coating the cylindrical lateral surface of the bolt with a soldering flux or a solder material; c) providing a metal sheet made of bronze and forming the metal sheet into a cylindrical sleeve having a longitudinal slot, wherein a first side of the metal sheet forming an inside of the sleeve is coated with a solder material or a soldering flux before or after the forming process, either the lateral surface of the bolt or the inside of the sleeve having the soldering flux; d) sliding the sleeve onto the lateral surface of the bolt; e) integrally bonding the lateral surface and the sleeve by soldering to form a solder layer between the cylindrical lateral surface of the metal bolt and the sleeve; and f) closing the longitudinal slot of the sleeve by welding.

2. The method according to claim 1, wherein the solder material comprises silver.

3. The method according to claim 1, wherein the solder material is applied in a layer thickness in a range of up to 160 m.

4. The method according to claim 1, wherein the solder material is applied by thermal spraying.

5. The method according to claim 1, wherein the sleeve is pressed against the bolt during the soldering.

6. The method according to claim 1, wherein the sleeve is inductively heated during the soldering.

7. The method according to claim 1, wherein the metal sheet has a sheet thickness in a range of from 0.1 to 10 mm.

8. The method according to claim 1, further comprising machining a second side of the metal sheet facing away from the bolt.

9. A component of a sliding bearing produced by the method according to claim 1.

10. An assembly, comprising: a sliding bearing comprising: a component including a metal bolt with a cylindrical lateral surface and two end faces, and a cylindrical sleeve formed of a metal sheet made of bronze and having a longitudinal slot located on the metal bolt, wherein one of a first side of the metal sheet forming an inside of the sleeve or the cylindrical lateral surface is coated with a solder material and the other of the first side of the metal sheet forming an inside of the sleeve or the cylindrical lateral surface is coated with a soldering flux prior to sliding the cylindrical lateral sleeve onto the bolt and integrally bonding the cylindrical lateral surface and the sleeve by soldering to form a solder layer between the cylindrical lateral surface of the metal bolt and the sleeve, and wherein the longitudinal slot of the sleeve is closed by welding; a planetary wheel with a bore, wherein the component is accommodated centrally in the bore; and a second side of the metal sheet and the planetary wheel in a region of the bore are arranged in direct sliding contact.

11. The assembly of claim 10, wherein the second side of the metal sheet facing away from the bolt is machined.

12. The assembly of claim 10, wherein the solder material comprises silver.

13. The assembly of claim 10, wherein the solder material has a layer thickness in a range of up to 160 m.

14. The assembly of claim 10, wherein the metal sheet has a sheet thickness in a range of from 0.1 to 10 mm.

15. The assembly of claim 10, wherein the longitudinal slot of the sleeve is closed by laser welding.

16. The assembly of claim 10, wherein the longitudinal slot extends parallel to a central axis of the cylindrical sleeve.

17. An assembly, comprising: a sliding bearing comprising: a component including a metal bolt with a cylindrical lateral surface and two end faces; and a cylindrical sleeve formed of a metal sheet made of bronze and having a longitudinal slot located on the metal bolt, wherein the longitudinal slot extends parallel to a central axis of the cylindrical sleeve; wherein one of a first side of the metal sheet forming an inside of the sleeve or the cylindrical lateral surface is coated with a solder material and the other of the first side of the metal sheet forming an inside of the sleeve or the cylindrical lateral surface is coated with a soldering flux prior to sliding the cylindrical lateral sleeve onto the bolt and integrally bonding the cylindrical lateral surface and the sleeve by soldering to form a solder layer between the cylindrical lateral surface of the metal bolt and the sleeve; a planetary wheel with a bore, wherein the component is accommodated centrally in the bore; and a second side of the metal sheet and the planetary wheel in a region of the bore are arranged in direct sliding contact.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIGS. 1 to 7 are intended to explain the disclosure by way of example. In the figures:

(2) FIG. 1 shows a metal foil and its forming into a sleeve with subsequent coating of the inside of the sleeve;

(3) FIG. 2 shows a bolt and the coating of its lateral surface;

(4) FIG. 3 shows another metal foil, its coating and forming into a sleeve;

(5) FIG. 4 shows another bolt and the coating of its lateral surface;

(6) FIG. 5 shows the connection of the bolt and the sleeve to form a component of a sliding bearing;

(7) FIG. 6 shows a longitudinal section through a sliding bearing comprising the component and a planetary wheel; and

(8) FIG. 7 shows a transmission for a wind turbine comprising a plurality of sliding bearings.

DETAILED DESCRIPTION

(9) The same reference symbols in the Figures denote the same components.

(10) In the top image, FIG. 1 shows a metal foil 5 made of bronze with a first side 5a and a second side 5b and with a metal sheet thickness of 1 mm. According to the image in the middle, the metal foil 5 is formed into a sleeve 7 by being rolled up, wherein a longitudinal slot 6 is formed. The first side 5a of the metal foil now forms the inside 7a of the sleeve 7. According to the bottom image, the inside 7a of the sleeve 7 is now coated with solder material 4, in particular by thermal spraying.

(11) FIG. 2 shows in the top image a bolt 2 with a lateral surface 2a and two end faces 2b, 2c. The bolt 2 is machined to size and cleaned. The bottom image shows that the lateral surface 2a of the bolt 2 is coated with a soldering flux material 3.

(12) In the top image, FIG. 3 shows a further metal foil 5 made of bronze with a first side 5a and a second side 5b and with a metal sheet thickness of 1 mm. According to the image in the middle, the first side 5a of the metal sheet 5 is coated with a soldering flux 3. According to the bottom image, the metal foil 5 together with the soldering flux 3 is now formed into a sleeve 7 by being rolled up, wherein a longitudinal slot 6 is formed. The first side 5a of the metal foil 5 with the layer of soldering flux 3 now forms the inside 7a of the sleeve 7.

(13) FIG. 4 shows another bolt 2 with a lateral surface 2a and two end faces 2b, 2c. The bolt 2 is machined to size and cleaned. The bottom image shows that the lateral surface 2a of the bolt 2 is coated with a solder material 4, in particular by thermal spraying.

(14) FIG. 5 shows the connection of a bolt 2 with a coated lateral surface 2a according to FIG. 2 and a sleeve 7 according to FIG. 1 or a bolt 2 with a coated lateral surface 2a according to FIG. 4 and a sleeve 7 according to FIG. 3 to form a component 1 of a sliding bearing 10 (see FIG. 6). The top image shows that the sleeve 7 is pushed onto the coated lateral surface of the bolt 2 and is pressed onto the bolt by means of clamps 8 and fixed in position. A soldering process then takes place, during which a material connection between the bolt 2 and the sleeve 7 is formed. The next image shows the bolt 2 with the sleeve 7 soldered on after the soldering process and after removing the clamps 8. A longitudinal slot 6 can be seen in the area of the sleeve 7, which is now closed by laser welding (see next image). If necessary, the sleeve 7 is machined on its side facing away from the bolt 2, which side corresponds to the second side 5b of the metal foil 5. The sliding surface 9 of the component 1 can therefore already be provided after the soldering or after the closing of the longitudinal slot 6 or only after the sleeve 7 has been machined. The component 1 is preferably cleaned and can now be used in a sliding bearing 10 (see FIG. 6).

(15) FIG. 6 shows a schematic longitudinal section through a sliding bearing 10 comprising the component 1 and a planetary wheel 12 with a bore 12a, in which the component 1 is accommodated. You can see the bolt 2, which is firmly bonded to the sleeve 7 via the solder layer 4. The sleeve 7 has the sliding surface 9 with which the planetary wheel 12 is in sliding contact in the region of the bore 12a. The planetary wheel 12 rotates around the component 1 concentrically to its longitudinal axis L and slides on the sliding layer 9.

(16) FIG. 7 shows a transmission 100 for a wind turbine comprising three sliding bearings 10. The sliding bearings 10 each comprise a component 1 in the form of a planetary wheel pin 11 and a planetary wheel 12, wherein the planetary wheel 12 and the component 1 or the planetary wheel pin 11 are in sliding contact with one another. Furthermore, a hollow gear 13, a sun gear 14 and a planetary carrier 15 can be seen.

LIST OF REFERENCE SYMBOLS

(17) 1 Component 2 Bolt 2a Lateral surface 2b, 2c End face 3 Soldering flux 4 Solder material 4 Solder layer 5 Metal sheet 5a First side 5b Second side 6 Longitudinal slot 7 Sleeve 7a Inside 8 Clamp 9 Sliding surface 10 Sliding bearing 11 Planetary wheel pin 12 Planetary wheel 12a Bore 13 Hollow gear 14 Sun gear 15 Planetary carrier 100 Transmission L Longitudinal axis