Axial sliding bearing with rigid sliding segments

Abstract

The present invention relates to an assembly for a wind turbine transmission device having a planetary carrier (101), an axial sliding bearing, and planetary gears (109) rotatably supported in the planetary carrier by means of the axial sliding bearing. The axial sliding bearing has one or more sliding sections (111), each of which is rigidly fixed in a respective cylindrical recess (113) of the planetary carrier by means of a cylindrical section.

Description

Technical Field

[0001] The present invention relates to a component of the preamble of claim 1. Background Technology

[0002] In existing technology, it is known that wind turbine transmissions with planetary gears have planetary gear sliding supports. Thrust washers are used as axial rolling bearings in these transmissions. Summary of the Invention

[0003] The objective of this invention is to improve the transmission mechanism of a wind turbine compared to the prior art. This objective is achieved by the components according to claim 1. Preferred improvements are contained in the dependent claims and will become apparent from the following description and drawings.

[0004] The component according to the invention is used in a wind turbine transmission. The component includes a planetary carrier, an axial sliding bearing, and planetary gears. The planetary carrier is fixed relative to the housing, or the planetary carrier is rotatably supported in the housing or a structure fixed relative to the housing. The planetary gears are rotatably supported in the planetary carrier. In particular, the planetary gears can be rotatably supported on planetary pins, which are rigidly (i.e., without the possibility of relative movement) fixed in the planetary carrier. Preferably, the planetary gears are supported by radial sliding bearings, i.e., sliding bearings, which support the planetary gears radially about their axis of rotation.

[0005] An axial sliding bearing is a type of sliding bearing that supports the device about its axis of rotation, i.e., in the direction of the axis of rotation. Currently, the device to be supported is a planetary gear. Accordingly, the planetary gear is rotatably supported in a planet carrier by means of an axial sliding bearing and, if necessary, additional axial and / or radial bearings (which are also preferably sliding bearings).

[0006] According to the present invention, the axial sliding bearing has one or more sliding sections. In particular, the axial sliding bearing may consist of one or more sliding sections. The sliding sections are preferably made of a sliding bearing material, such as an alloy having copper, tin, zinc, aluminum and / or lead.

[0007] A sliding section is a device with sliding surfaces. The sliding surface of a planetary gear currently forms a sliding surface pair with the sliding surfaces of one or more sliding sections. The sliding surface of each sliding surface pair is configured to transmit force through a lubrication gap extending between the sliding surfaces or through direct contact. The force is currently transmitted axially. The planetary gear may be integrally formed with the aforementioned sliding surfaces, or, for example, have thrust washers forming the sliding surfaces.

[0008] One or more sliding segments each form a cylindrical section. This section may extend over the entire sliding segment or only a portion of it. The one or more sliding segments are rigidly (i.e., without any possibility of relative movement) fixed to the cylindrical recesses of the planetary carrier using their respective cylindrical sections. Thus, for each of the one or more sliding segments, the planetary carrier forms a cylindrical recess in which the sliding segment is rigidly fixed. Accordingly, the planetary carrier has one or more such recesses. The recesses are preferably arranged in at least one side plate of the planetary carrier. The planetary carrier and / or at least one side plate preferably form the recesses integrally.

[0009] "Cylindrical" refers to a cylindrical shape. Therefore, one or more cylindrical sections of the sliding segment have a cylindrical shape. The cylindrical shape can be a cylinder or a cylinder whose base surface has a different shape than a circle. The empty portion of the planetary carrier has a corresponding hollow cylindrical shape.

[0010] An advantage of this invention is that one or more sliding segments can be used independently of the diameters of the planetary gears and planetary pins. This allows for the reuse of structurally identical segments in different transmission systems. Furthermore, the axial space requirement is reduced because the sliding segments only need to protrude minimally relative to the side plates of the planetary carrier.

[0011] One or more sliding segments are preferably force-locked into their respective openings in the planetary carrier. In a preferred improvement, this force-locking is achieved by an interference fit. The advantage of an interference fit is that it can be manufactured simply and reliably. For example, it is possible that one or more sliding segments are hammered into their respective openings in the planetary carrier using a hammer.

[0012] In a preferred embodiment, one or more sliding segments are implemented integrally and / or as separate parts. The implementation as separate parts means that the one or more sliding segments do not directly contact each other, and in particular, are not integrally connected to each other.

[0013] In a preferred improvement, one or more sliding segments have a basic cylindrical shape. The advantage is that the cylindrical body can be manufactured in a simple manner from low-cost rod materials.

[0014] The basic shape of the main body refers to the shape of the original main body, which is formed from the original main body by removing various regions, for example by introducing blanks, and / or by adding various regions, or whose shape corresponds to the shape of the main body mentioned at the beginning. Therefore, the shapes of one or more sliding segments respectively correspond to the column, or are formed from the column by adding blanks, and / or by adding various regions. In particular, the shapes of one or more sliding segments can be formed from the column by rounding or chamfering one or more edges. Preferably, the edges extending to the sliding surfaces of the respective sliding segments at the transitions on the circumferential surfaces of the column or the respective sliding segments are rounded. Attached Figure Description

[0015] Preferred embodiments of the invention are shown in the accompanying drawings. Here, consistent reference numerals denote the same or functionally identical features. In detail: Figure 1 Planetary level was shown; and Figure 2 Different variations of the sliding section are shown. Detailed Implementation

[0016] Figure 1 The planetary carrier 101 shown has a first side plate 103 and a second side plate 105. A planetary pin 107 extends between the two side plates 103 and 105 and is fixed in the two side plates 103 and 105. Planetary gears 109 are rotatably supported on the planetary pin 103 by means of radial sliding bearings.

[0017] The cylindrical sliding section 111 serves as an axial sliding bearing for the planetary gear 109. The first side plate 103 and the second side plate 105 each have a plurality of such sliding sections 111.

[0018] The sliding sections 111 are respectively inserted into the openings 113 of the first side plate 103 or the second side plate 105, and are locked in place in their respective openings 113 by means of an interference fit. Under axial load, the planetary gears 109 are supported by the sliding sections 111 in their respective side plates 103 and 105. Here, the planetary gears 109 are in contact with the sliding sections 111.

[0019] The sliding segment 111 can be designed in different types. Corresponding embodiments are described in... Figure 2 As shown in the figure. In the first embodiment 111a, the sliding segment 111 has a basic cylindrical shape with rounded edges.

[0020] In the second embodiment 111b and the third embodiment 111c, the sliding segment is composed of a first segment 201 and a second segment 203. The first segment 201 and the second segment 203 each have a basic cylindrical shape with rounded edges.

[0021] Both the second embodiment 111b and the third embodiment 111c share the characteristic that their respective sliding segments 111 are locked in place in the corresponding open portions of the first side plate 103 or the second side plate 105 by means of an interference fit using the first segment 201. The diameter of the second segment 203 is larger than that of the first segment 201.

[0022] The second embodiment 111b is characterized in that the second section 203 is inserted into a corresponding recess in the first side plate 103 or the second side plate 105. This is advantageous for structural space requirements in the axial direction. However, the recess for the second section 203 must be drilled in an additional manufacturing step.

[0023] Therefore, according to the third embodiment 111c, the second section 203 is completely outside the side plates 103 and 105. The second section 203 is located on the side of the first side plate 103 or the second side plate 105. Only the first section 101 is inserted into the empty portion of the respective side plates 103 and 105. In view of the requirement for the smallest possible axial structural space, the second section 203 is implemented accordingly in a flat manner.

[0024] List of reference numerals

[0025] Planetary 101

[0026] 103 side panel

[0027] 105 side panel

[0028] 107 planetary pins

[0029] 109 Planetary Wheels

[0030] 111 sliding segment

[0031] 111A Example

[0032] 111b Example

[0033] 111c Example

[0034] 113 Empty Section

[0035] Section 201

[0036] Section 203

Claims

1. An assembly for a wind turbine transmission, the assembly having a planetary carrier (101), an axial sliding bearing, and planetary gears (109) rotatably supported in the planetary carrier (101) by means of the axial sliding bearing, characterized in that, The axial sliding bearing has one or more sliding sections (111), which are rigidly fixed in their respective cylindrical recesses (113) of the planetary carrier (101) by means of cylindrical sections.

2. The component according to claim 1, characterized in that, The one or more sliding sections (111) are respectively fixed in their respective open portions (113) by means of interference fit.

3. The component according to any one of the preceding claims, characterized in that, The one or more sliding segments (111) are implemented integrally and / or implemented as separate parts.

4. The component according to any one of the preceding claims, characterized in that, The one or more sliding segments (111) have a basic cylindrical shape.

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