Lubrication of mating teeth at output end of wind turbine transmission

Abstract

The invention relates to a wind turbine transmission assembly having a housing (101), an output shaft (103), a bearing assembly (105), an intermediate shaft (107) and a transfer means (123) for lubricant, the output shaft (103) and the intermediate shaft (107) each having a toothing; the tooth part of the output shaft (103) and the tooth part of the intermediate shaft (107) form a matched tooth part (109); wherein the shell (101) is provided with a protruding part (111) extending on the generator side; and wherein the output shaft (103) is rotatably mounted in the projection (111) by means of a bearing arrangement (105). The output shaft (103) and the projection (111) each have one or more lubricant lines (117, 119, 127, 129, 131, 135); wherein a transfer means (123) connects the lubricant line (117, 119) of the projection (111) to the lubricant line (127, 129, 131, 135) of the output shaft (103) in a lubricant and pressure-conducting manner; and wherein a lubricant line (127, 129, 131, 135) of the output shaft (103) is connected to the mating toothing (109) in a lubricant-and pressure-conducting manner.

Description

Technical Field

[0001] The present invention relates to a wind turbine generator transmission assembly according to the preamble of claim 1. Background Technology

[0002] EP1 488 139 B1 discloses a lubricant transfer ring. It is used to connect a rotatable planetary carrier to a fixed transmission housing in a manner that guides lubricant. Summary of the Invention

[0003] The objective of this invention is to improve the lubricant supply to the mating gears that connect the intermediate shaft and output shaft of a wind turbine generator drive system in a manner resistant to relative rotation. This objective is achieved by the wind turbine generator drive system assembly according to claim 1. Preferred improvements are contained in the dependent claims and will become apparent from the following description.

[0004] A wind turbine generator drive assembly refers to a component constructed for use as a drive unit or part of a wind turbine generator set. A wind turbine generator drive unit is a transmission device constructed for the drive system of a wind power facility. As part of the drive system, the drive unit transfers the rotation of a wind-driven rotor to the generator.

[0005] The component according to the invention has a housing, an output shaft, at least one intermediate shaft, at least one support assembly, and at least one transfer device for lubricant.

[0006] The output shaft is characterized by its configuration for transmitting the output torque of the drive unit. The output shaft extends through the drive unit housing. This means that a portion of the output shaft is located inside the drive unit housing, while another portion is located externally. This last part is configured for anti-rotational coupling with the rotor of the wind turbine's generator.

[0007] The intermediate shaft is located inside the transmission housing and / or inside the output shaft. Like the output shaft, the intermediate shaft has teeth. The teeth of the intermediate shaft and the output shaft interlock and thus form mating teeth.

[0008] A mating tooth connection typically refers to a multiple follower connection. This is a connection between two interlocking, coaxially oriented teeth that resist relative rotation.

[0009] The housing has protrusions. The outward-flaring portion (Ausstülpung) on ​​the generator side of the housing is called a protrusion. It is a housing portion extending in the direction of the generator. The protrusion is projecting on the generator side. In particular, the protrusion can project relative to the rest of the housing, that is, relative to housing portions that are not part of the protrusion. The protrusion can form a separate housing portion, or it can be integrally connected to one or more portions of the rest of the housing.

[0010] The output shaft can be rotatably supported in the protrusion by means of a support assembly. This means that the output shaft is supported in the protrusion by means of a support assembly. Here, the bearing raceways of the support assembly are integrally constructed by the output shaft, the protrusion, or the bearing ring (which engages with the output shaft or the protrusion).

[0011] According to the invention, the protrusion and the output shaft each have one or more lubricant lines. The lubricant lines of the protrusion or the output shaft are preferably integrally integrated into the protrusion or the output shaft. This can be achieved in a simple manner through one or more drill holes that penetrate into each other.

[0012] The transfer device interconnects the lubricant lines of the protrusion with the lubricant lines of the output shaft in a manner that guides lubricant and pressure. In the connection of guiding lubricant and pressure between the two lubricant lines, the pressurized lubricant is at least partially transferred from one lubricant line to the other, i.e., with possible leakage losses. Pressure is also at least partially transferred using the lubricant.

[0013] Therefore, the lubricant under pressure is currently guided at least partially from the lubricant line of the protrusion to the lubricant line of the output shaft via a transfer device, wherein the pressure is at least partially transmitted from the lubricant line of the protrusion to the lubricant line of the output shaft.

[0014] Finally, the lubricant line of the output shaft is connected to the mating teeth in a manner that guides the lubricant and pressure. Therefore, according to the present invention, the lubricant under pressure enters the lubricant line of the output shaft from the lubricant line of the protrusion through the transfer device, and from there enters the mating teeth.

[0015] Because of the continuous guiding pressure connection according to the present invention, centrifugal force, which affects the lubricant due to the rotation of the intermediate shaft and the output shaft, can be overcome, and the lubricant is transported away from the mating teeth and in the opposite direction to the flow direction of the lubricant circuit. Therefore, reliable lubrication of the mating teeth can be ensured in all operating conditions.

[0016] In a preferred improvement, the transfer device forms a hollow space. Through this hollow space, the lubricant lines of the protrusion and the output shaft are interconnected in a manner that guides lubricant and pressure. Accordingly, the lubricant lines of the output shaft and the protrusion extend into the hollow space.

[0017] In a further preferred embodiment, the transfer device is formed by a ring and a groove. The ring typically refers to a rotationally symmetric object with a continuous central void. Currently, the ring is rotationally symmetric with respect to the axis of rotation of the output shaft and has at least two walls.

[0018] The groove is also rotationally symmetrical with respect to the axis of rotation. This allows a ring with two walls to be embedded in the groove, such that the ring and the groove form the aforementioned hollow space. Either the protrusion has a ring and the output shaft has a groove, or the protrusion has a groove and the output shaft has a ring.

[0019] The ring can be implemented as a separate part and mounted on the base of the protrusion or output shaft. This is possible by using a ring composed of an elastomer. The elasticity of this ring is advantageous, as it allows for contact between the ring wall and the groove. This reduces leakage losses that occur between the wall and the groove.

[0020] Alternatively, the ring can be made of a rigid, non-flexible material, such as metal. This requires gaps extending between the corresponding walls and grooves of the ring. Thus, although leakage losses occur, such a ring is non-abrasive. It is particularly possible to integrate the ring integrally into the protrusion or output shaft.

[0021] In a preferred improvement, the output shaft is supported only in the protrusion. This means that there are no additional bearings for supporting the output shaft besides the aforementioned support assembly. According to the improvement, the output shaft is supported only by the support assembly within the housing.

[0022] In a preferred embodiment, the intermediate shaft is at least partially supported within the output shaft by mating teeth. Thus, the output shaft bears at least a portion of the weight of the intermediate shaft. Therefore, according to the improved embodiment, the output shaft and the intermediate shaft share the aforementioned support assembly.

[0023] The intermediate shaft's support within the output shaft is particularly advantageous in intermediate shafts designed as planetary-scale sun shafts. In this case, the intermediate shaft is supported on one side by mating teeth within the output shaft and on the other side by a sun gear within a planetary-scale planetary gear. This structure compensates for support deviations caused by tolerances within the planetary-scale structure.

[0024] In a preferred embodiment, the intermediate shaft and the output shaft enclose a hollow space. This hollow space connects the lubricant lines of the output shaft and the mating teeth in a manner that guides lubricant and pressure. For this purpose, the aforementioned lubricant lines pass through the hollow space. Furthermore, the hollow space is directly adjacent to the mating teeth. Apart from the passage of the lubricant lines to the output shaft, the hollow space has no other openings. Therefore, the hollow space serves to guide lubricant and pressure.

[0025] The output shaft is preferably designed as a hollow shaft, i.e., a shaft with an internal hollow space that connects or extends into the ends of the shaft. The mating teeth are located inside the hollow shaft, i.e., within the aforementioned hollow space. Because the mating teeth are formed by the intermediate shaft, this implies that the intermediate shaft extends into the hollow shaft or the hollow space. Therefore, according to the improved design, a portion of the intermediate shaft is located within the intermediate shaft or the hollow space.

[0026] Preferably, the output shaft, designed as a hollow shaft, is further improved by utilizing a shoulder located inside the hollow shaft, i.e., in the hollow space. The intermediate shaft rests against this shoulder using its generator-side end face. According to the improved design, the hollow space surrounded by the intermediate shaft and the output shaft extends between the mating teeth and the shoulder. Here, the hollow space is directly adjacent to the mating teeth and the shoulder. Attached Figure Description

[0027] Embodiments of the present invention are as follows Figure 1 As shown in the image. In detail: Figure 1 The output end of the wind turbine generator drive is shown. Detailed Implementation

[0028] Figure 1 The output side section of the transmission housing 101 is shown, in which the output shaft 103, designed as a hollow shaft, is supported by a support assembly 105. The support assembly 105 consists of two tapered roller bearings arranged in an O-shape.

[0029] On the generator side, that is... Figure 1 On the right side, the output shaft 103 can be threadedly connected to the generator rotor. The rotor does not have its own support and is entirely supported by the output shaft 103.

[0030] The output shaft 103 is driven by an intermediate shaft 107. For this purpose, the output shaft 103 and the intermediate shaft 107 are coupled by a mating tooth 109. The intermediate shaft 107 forms a corresponding external tooth. The internal tooth of the mating tooth is located inside the output shaft 103. The external and internal teeth are coaxially oriented and interlocked, thereby achieving a connection between the output shaft 103 and the intermediate shaft 107 that resists relative rotation.

[0031] The transmission housing 101 forms a protrusion 111 on the output side or generator side. The protrusion extends from the base 113 of the transmission housing 101 towards the generator, i.e., at... Figure 1 The right side of the border between China and North Korea extends.

[0032] In the protrusion 101, the middle portion of the output shaft 103 is located next to the support assembly 105. Accordingly, the output shaft 103 is supported in the protrusion 111 by means of the support assembly 105. The outer bearing ring of the support assembly 105 engages with the protrusion 111, and the inner bearing ring engages with the output shaft 103.

[0033] The oil lines are configured to lubricate the mating gear 109. The oil lines include a first oil line 115 that extends through the wall of the base 113.

[0034] The first oil line 115 leads into the second oil line 117. The second oil line 117 consists of a plurality of interconnected drill holes that enter into the protrusion 111. One of these drill holes branches along the direction of the support assembly 105 and leads into the hollow space between the two bearings of the support assembly 105.

[0035] Another borehole in the second oil line 117 leads into the third oil line 119. The third oil line 119 extends through the first intermediate ring 121. The first intermediate ring is arranged inside the protrusion 111.

[0036] The first intermediate ring 121 has a U-shaped lubricant transfer ring 123. The third oil line 121 leads into the lubricant transfer ring.

[0037] A lubricant transfer ring 123 is embedded in a groove 124, which extends in a second intermediate ring 125. The second intermediate ring 125 is fixed to the outer periphery of the output shaft 123.

[0038] The fourth oil line 127 leads into the tank. The fourth oil line 127 extends through the second intermediate ring 125. On the other hand, the fourth oil line leads into the fifth oil line 129.

[0039] The fifth oil line 129 is formed by a borehole in the output shaft 103. The borehole extends radially through the output shaft 103 and leads into the sixth oil line 131.

[0040] The sixth oil line 131 extends through the third intermediate ring 133. The third intermediate ring is located inside the hollow shaft 103. The sixth oil line 131 leads into the seventh oil line 135.

[0041] The seventh oil line 135 is also formed through a borehole in the output shaft 103. This borehole extends in the axial direction and leads into the hollow space 137.

[0042] The hollow space 137 is formed by the output shaft 103 and the intermediate shaft 107. In the region of the hollow space, the output shaft 103 has a shoulder 139. The intermediate shaft 107 rests on the shoulder 139 by means of its generator-side end.

[0043] The mating tooth 109 is located on the part of the hollow space 137 that is axially opposite to the shoulder 139. It is directly adjacent to the hollow space 137. Therefore, the mating tooth 109 is connected to the seventh oil line 135 through the hollow space 137 in an oil guiding manner.

[0044] List of reference numerals

[0045] 101 Transmission Device Housing

[0046] 103 output shaft

[0047] 105 support assembly

[0048] 107 intermediate shaft

[0049] 109 mating teeth

[0050] 111 protrusions

[0051] 113 matrix

[0052] 115 First Oil Route

[0053] 117 Second Oil Line

[0054] 119 Third Oil Line

[0055] 121 First Intermediate Ring

[0056] 123 Lubricant Transfer Ring

[0057] 124 slots

[0058] 125 Second Intermediate Ring

[0059] 127 Fourth Oil Line

[0060] 129 Fifth Oil Line

[0061] 131 Sixth Oil Line

[0062] 133 intermediate ring

[0063] 135 Seventh Oil Route

[0064] 137 Hollow Space

[0065] 139 shoulder

Claims

1. A wind turbine drivetrain assembly having a housing (101), an output shaft (103), a bearing assembly (105), an intermediate shaft (107) and transfer means (123) for lubricant; wherein, The output shaft (103) and the intermediate shaft (107) each have a toothing; wherein the toothing of the output shaft (103) and the toothing of the intermediate shaft (107) form a mating toothing (109); wherein the housing (101) has a protrusion (111) which extends on the generator side; and wherein the output shaft (103) is rotatably supported in the protrusion (111) by means of the bearing assembly (105); characterized in that the output shaft (103) and the protrusion (111) each have one or more lubricant lines (117, 119, 127, 129, 131, 135); wherein the transfer means (123) interconnect the lubricant lines (117, 119) of the protrusion (111) with the lubricant lines (127, 129, 131, 135) of the output shaft (103) in a lubricant- and pressure-conducting manner; and wherein the lubricant lines (127, 129, 131, 135) of the output shaft (103) are connected to the mating toothing (109) in a lubricant- and pressure-conducting manner.

2. The assembly of claim 1, wherein, The transfer means (123, 124) form a hollow space; wherein the lubricant lines (127, 129, 131, 135) of the output shaft (103) and the lubricant lines (117, 119) of the protrusion (111) open into the hollow space.

3. Assembly according to the preceding claim, characterized in that The transfer means (123, 124) are formed by a ring (123) which is rotationally symmetrical with respect to the rotational axis of the output shaft (103) and a groove (124) which is rotationally symmetrical with respect to the rotational axis; wherein the ring (123) has two walls, the ring being inserted into the groove (123) with the walls, such that the ring (123) and the groove (124) form the hollow space.

4. The assembly of any of the preceding claims, wherein, The output shaft (103) is supported exclusively in the protrusion (111).

5. The assembly of any of the preceding claims, wherein, The intermediate shaft (107) is supported at least partially in the output shaft (103) by means of the mating toothing (109).

6. The assembly of any of the preceding claims, wherein, The output shaft (103) and the intermediate shaft (107) enclose a hollow space (137) which interconnects the lubricant lines (135) of the output shaft (103) and the mating toothing (109) in a lubricant- and pressure-conducting manner.

7. The assembly of any of the preceding claims, wherein, The output shaft (103) is designed as a hollow shaft, wherein the mating toothing (109) is located inside the hollow shaft.

8. The assembly of claim 7 when dependent from claim 6, wherein There is a shoulder (139) in the output shaft (103), wherein the intermediate shaft (107) abuts against the shoulder (139) with its end face on the generator side, wherein the hollow space (137) enclosed by the output shaft (103) and the intermediate shaft (107) extends between the mating toothing (109) and the shoulder (139).

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