Wind power gear box and planet carrier assembling structure thereof

Abstract

The utility model discloses a wind power gear box and a planet carrier assembling structure thereof, the planet carrier assembling structure comprises a planet carrier, a planet wheel, a planet pin shaft arranged between the planet wheel and the planet carrier, and a planet wheel bearing sleeved on the periphery of the planet pin shaft, and the planet pin shaft and the planet carrier are fixed through a fastener. The planet pin shaft is provided with a first lubricating oil way, the planet carrier is provided with a second lubricating oil way, a first oil inlet hole communicated with the first lubricating oil way is formed in the periphery of the planet pin shaft, a second oil inlet hole communicated with the second lubricating oil way is formed in the periphery of the planet carrier, and the first oil inlet hole is matched with and communicated with the second oil inlet hole. The device does not need to reserve a large axial installation size, the overall axial length of the assembly structure is remarkably reduced, accurate positioning is conducted through the fixing holes and the fasteners, the situation that the circumferential positions of planetary pin shafts in a traditional assembly structure are random is changed, it is guaranteed that lubricating oil is evenly distributed to all planetary gear trains, and the service life of the planetary gear trains is prolonged. And the connection strength and rigidity of the planet carrier are obviously improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of wind power gear box, concretely relates to a wind power gear box and planet carrier assembly structure thereof. BACKGROUND

[0002] In the field of wind power generation, the traditional wind power gear box as a key transmission component, its performance and structure have important influence on the overall efficiency and reliability of the wind turbine, the assembly structure of the planet carrier and the planet pin shaft is one of the core parts in the wind power gear box, which is directly related to the transmission efficiency and lubrication effect of the gear box.

[0003] In the prior art, the assembly of the planet carrier and the planet pin shaft adopts the positioning mode of the collar 9, and this assembly structure requires that the planet carrier has sufficient axial installation size to ensure that the planet pin shaft can be accurately installed in place, however, with the continuous development of wind power technology, large megawatt and lightweight become important development trends of wind turbine, and the traditional collar 9 positioning assembly structure cannot meet the requirements of compactness and lightweight of the current wind turbine due to the need to reserve a large axial installation size.

[0004] In addition, the circumferential positions of the planet pin shafts of each planetary gear train relative to the planet carrier are random after the assembly of the traditional assembly structure, which means that the oil inlet holes on the planet pin shafts and the oil inlet holes on the planet carrier cannot be one-to-one corresponding, resulting in uneven distribution of lubricating oil, in order to make up for this defect, an annular oil groove is usually used between the planet pin shaft and the planet carrier for oil guiding, however, this oil guiding mode still cannot completely eliminate the difference in lubricating flow among the planetary gear trains, thereby affecting the lubrication effect of the bearings and gears, reducing the transmission efficiency and service life of the gear box, and in summary, there is an urgent need for a wind power gear box and planet carrier assembly structure. UTILITY MODEL CONTENTS

[0005] In order to solve the above-mentioned technical problems in the prior art, on the one hand, the utility model provides a planet carrier assembly structure for a wind power gear box, which comprises a planet carrier, a planet wheel, a planet pin shaft arranged between the planet wheel and the planet carrier, and a planet wheel bearing sleeved on the outer periphery of the planet pin shaft, wherein:

[0006] One end of the planet pin shaft is provided with a first fixing hole, and the planet carrier is provided with a second fixing hole matched with the first fixing hole, the planet pin shaft and the planet carrier are fixed by a fastener, the fastener is threadedly connected in the first fixing hole after passing through the second fixing hole, the planet pin shaft is provided with a first lubricating oil path, the planet carrier is provided with a second lubricating oil path, the outer periphery of the planet pin shaft is provided with a first oil inlet hole communicated with the first lubricating oil path, the outer periphery of the planet carrier is provided with a second oil inlet hole communicated with the second lubricating oil path, and the first oil inlet hole is matched and communicated with the second oil inlet hole.

[0007] As a specific embodiment, in the planetary carrier assembly structure for the wind power gear box, the fastener is a fastening bolt.

[0008] As a specific embodiment, in the planetary carrier assembly structure for the wind power gear box, a locking washer is arranged between the fastener and the planetary carrier.

[0009] In another aspect, the utility model also provides a wind power gear box, the wind power gear box includes the planetary carrier assembly structure.

[0010] The planetary carrier assembly structure for the wind power gear box has the following advantages and beneficial effects:

[0011] (1) The device has simple structure and is convenient to disassemble and assemble, discards the traditional clamping ring positioning mode, adopts the mode that the fastener is screwed through the corresponding fixed holes on the planetary carrier and the planet pin shaft, does not need to reserve a large axial installation size, significantly reduces the overall axial length of the assembly structure, and obviously improves the connection strength and stiffness of the planetary carrier.

[0012] (2) The device is accurately positioned through the fixed hole and the fastener, changes the random circumferential position of the planet pin shaft in the traditional assembly structure, thereby ensuring that the first oil inlet hole of the planet pin shaft and the second oil inlet hole of the planetary carrier are accurately matched and communicated, accurately connecting the first lubricating oil path and the second lubricating oil path, and ensuring that the lubricating oil is evenly distributed to each planetary gear train, and the device has good practicability. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only for further understanding of the embodiments of the utility model and constitute a part of the utility model, and for the ordinary skilled in the art, other drawings can be obtained without creative labor according to these drawings. In the drawings:

[0014] Figure 1 It is a structural schematic view of the planetary carrier assembly structure for the wind power gear box of the utility model;

[0015] Figure 2 It is a structural schematic view of the planetary carrier assembly structure in the prior art.

[0016] Explanation of reference signs:

[0017] 1 - planetary carrier, 2 - planet pin shaft, 3 - fastener, 4 - locking washer, 5 - second lubricating oil path, 6 - first lubricating oil path, 7 - planetary wheel bearing, 8 - planetary wheel, 9 - clamping ring. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the utility model clearer, the utility model technical scheme will be described clearly and completely below by combining with the utility model specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by the person skilled in the art without making creative efforts belong to the protection scope of the utility model.

[0019] As shown in Figure 1 , Figure 2 The utility model discloses a kind of wind power gear box and its planet carrier assembly structure.

[0020] In one aspect, the planet carrier assembly structure for wind power gear box of the utility model includes planet carrier 1, planetary gear 8, planet pin shaft 2 is arranged between planetary gear 8 and planet carrier 1, planetary gear bearing 7 is sleeved on the outer periphery of planet pin shaft 2, planetary gear 8 is sleeved on the outer periphery of planet pin shaft 7, planet carrier 1 and planet pin shaft 2 are interference fit, the friction between planet pin shaft 2 and planetary gear 8 is reduced by planetary gear bearing 7, wherein, first fixed hole is formed in one end of planet pin shaft 2, internal thread is arranged in first fixed hole, second fixed hole matched with first fixed hole is formed on planet carrier 1, planet pin shaft 2 and planet carrier 1 are fixed by fastener 3, external thread matched with internal thread is arranged on the outer periphery of fastener 3, fastener 3 is threadedly connected in first fixed hole after passing through second fixed hole, planet pin shaft 2 is provided with first lubricating oil path 6, planet carrier 1 is provided with second lubricating oil path 5, first oil inlet hole communicated with first lubricating oil path 6 is formed on the outer periphery of planet pin shaft 2, second oil inlet hole communicated with second lubricating oil path 5 is formed on the outer periphery of planet carrier 1, first oil inlet hole is matched and communicated with second oil inlet hole, in the assembly process, by accurate design and processing, first oil inlet hole and second oil inlet hole can be accurately matched and communicated, when wind power gear box works, lubricating oil flows from second lubricating oil path 5 to second oil inlet hole, then enters first lubricating oil path 6 of planet pin shaft 2 through first oil inlet hole communicated with second oil inlet hole, and then is delivered to each lubrication-required part, such as contact part of planetary gear 8 and planetary gear bearing 7, planet pin shaft 2 etc., to ensure that each component is fully and evenly lubricated.

[0021] As a specific embodiment, in the planet carrier assembly structure for wind power gear box of the utility model, fastener 3 is fastening bolt, of course, other fasteners 3 such as fastening screw can also be used, as long as high-strength fixation to the axial direction of planetary gear bearing 7 is met.

[0022] As a specific embodiment, in the planet carrier assembly structure for the wind power gear box, the locking washer 4 is arranged between the fastener 3 and the planet carrier 1, so that the connection between the fastener 3 and the planet carrier 1 is more stable, and the stability of the whole during the operation of the wind power gear box is improved.

[0023] On the other hand, the utility model also provides a wind power gear box, the wind power gear box includes the planet carrier assembly structure.

[0024] The working principle of the planet carrier assembly structure for the wind power gear box is that the planet pin shaft 2 is aligned with the second fixed hole on the planet carrier 1 through the first fixed hole at one end, and is rigidly fixed and connected by the fastener 3, replacing the axial installation space required by the traditional retaining ring 9 positioning, without reserving additional axial size on the planet carrier 1, thereby reducing the overall axial length of the assembly structure, meeting the design requirements of compactness and light weight of the wind power gear box, and the opening positions of the first oil inlet hole and the second oil inlet hole can be set in advance according to the installation position of the fastener 3, realizing accurate matching of the hole positions, ensuring that each planet gear 8 is lubricated equally, effectively reducing bearing wear and gear meshing loss, improving transmission efficiency and prolonging the service life of the gear box.

[0025] In summary, compared with the prior art, the planet carrier assembly structure for the wind power gear box has the following advantages and beneficial effects:

[0026] (1) The device has simple structure and is convenient to disassemble and assemble, discards the traditional retaining ring 9 positioning mode, adopts the mode that the fastener 3 is screwed through the corresponding fixed holes on the planet carrier 1 and the planet pin shaft 2, does not need to reserve a large axial installation size, significantly reduces the overall axial length of the assembly structure, and obviously improves the connection strength and rigidity of the planet carrier 1.

[0027] (2) The device is accurately positioned through the fixed hole and the fastener 3, changes the random circumferential position of the planet pin shaft 2 in the traditional assembly structure, thereby ensuring that the first oil inlet hole of the planet pin shaft 2 is accurately matched and communicated with the second oil inlet hole of the planet carrier 1, realizing accurate butt joint of the first lubricating oil path 6 and the second lubricating oil path 5, and ensuring that the lubricating oil is evenly distributed to each planet gear 8, and the device has good practicability.

[0028] It should be noted that, in this article, unless otherwise specified and limited, the term "connection" or its synonyms should be understood broadly, for example, "connection" can be fixed connection, can also be detachable connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through intermediate medium, can be internal communication of two elements or interaction relationship of two elements, for those skilled in the art, the specific meaning of the above-mentioned term in the utility model can be understood according to the specific circumstances. Moreover, such as "first" and "second" and other expressions are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. At the same time, the term "includes", "contains" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or equipment. In addition, "front", "back", "left", "right", "up", "down" and the like in this article are referred to the placement state shown in the drawings.

[0029] Finally, it should be pointed out that: the above examples are only used to illustrate the technical solutions of the utility model, but not to limit them; although the utility model has been described in detail with reference to the examples, those skilled in the art should understand that: the technical solutions recorded in the foregoing examples can still be modified, or some technical features can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A planetary carrier assembly structure of a wind turbine gear box, characterized by, The planetary carrier assembly structure of the wind power gear box comprises a planetary carrier, a planetary gear, a planetary pin shaft arranged between the planetary gear and the planetary carrier, and a planetary gear bearing sleeved on the outer periphery of the planetary pin shaft, wherein: A first fixing hole is formed at one end of the planetary pin shaft, a second fixing hole matched with the first fixing hole is formed on the planetary carrier, the planetary pin shaft and the planetary carrier are fixed by a fastener, the fastener is threadedly connected in the first fixing hole after passing through the second fixing hole, the planetary pin shaft is provided with a first lubricating oil passage, the planetary carrier is provided with a second lubricating oil passage, a first oil inlet hole communicated with the first lubricating oil passage is formed on the outer periphery of the planetary pin shaft, and a second oil inlet hole communicated with the second lubricating oil passage is formed on the outer periphery of the planetary carrier, the first oil inlet hole is matched with and communicated with the second oil inlet hole.

2. The planetary carrier assembly structure of a wind power gear box according to claim 1, characterized in that, The fastener is a fastening bolt.

3. The planetary carrier assembly structure of a wind power gear box according to claim 1, characterized in that, A locking washer is arranged between the fastener and the planetary carrier.

4. A wind turbine gearbox, characterized in that The wind power gear box comprises the planetary carrier assembly structure according to any one of claims 1-3.

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