Center hole structure of output shaft of wind power generation gearbox

Abstract

The utility model relates to a center hole structure of an output shaft of a wind power generation gearbox, a center hole is a C-shaped center hole, and a spiral groove is arranged on an inner conical surface used for being matched with a tip on the center hole. The number of the spiral grooves is one or more. The spiral groove penetrates through the two ends of the inner conical surface and can effectively contain foreign matter. The design can be used for the output shaft with the center hole in the single end and can also be used for the output shaft with the center holes in the two ends. The spiral groove is formed in the inner conical surface of the center hole, foreign matter on the inner conical surface and the outer conical surface can be contained, and if uncleaned foreign matter is attached to the inner conical surface of the center hole or the outer conical surface of the center tip matched with the center hole, the foreign matter can be removed in the relative rotation process of the inner conical surface and the outer conical surface. And the foreign matters can enter the spiral groove formed in the inner conical surface of the central hole, so that the influence of the foreign matters on the product processing quality is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of wind power generation technology relates to a kind of center hole structure of wind power generation gear box output shaft. BACKGROUND

[0002] The output shaft of wind power generation gear box is one of the key mechanical components in wind turbine generator system, which is responsible for transmitting the rotational power after speed-up in the gear box to the generator. The blades of wind turbine are connected to the gear box through the low-speed shaft, and the output shaft drives the generator at a high speed after the transmission ratio adjustment of the gear box, thereby generating electric energy.

[0003] The center hole of the output shaft of wind power generation gear box currently in use is C-type center hole in national standard GB / T145, and the working surface of the center hole is a smooth conical surface with an angle of 60°.

[0004] If there are foreign matters attached to the inner conical surface of the center hole or the outer conical surface of the centering tip matched therewith, it will have a great impact on the processing quality of the product, such as affecting the roughness, roundness and cylindricity of the ground outer circle when grinding the outer circle by clamping the center hole with the centering tip. SUMMARY

[0005] Therefore, the utility model aims to solve the above problems and provide a center hole structure of the output shaft of wind power generation gear box.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] A center hole structure of the output shaft of wind power generation gear box, the center hole is C-type center hole, and a helical groove is arranged on the inner conical surface matched with the centering tip.

[0008] Further, the helical groove has one or more.

[0009] Further, the helical groove connects the large end and the small end of the inner conical surface.

[0010] Further, one end or both ends of the output shaft of wind power generation gear box are provided with the center hole.

[0011] The utility model has the advantages of:

[0012] 1、The utility model discloses a helical groove on the inner conical surface of the center hole, which can accommodate foreign matters on the inner and outer conical surfaces. If there are foreign matters attached to the inner conical surface of the center hole or the outer conical surface of the centering tip matched therewith, the foreign matters will enter the helical groove on the inner conical surface of the center hole during the relative rotation of the inner and outer conical surfaces, thereby avoiding the impact of the foreign matters on the processing quality of the product.

[0013] 2. Lubricating oil or coolant can enter the conical surface through the spiral grooves opened inside the central hole, playing a role in lubrication and cooling, further improving the product processing quality and the durability of the top.

[0014] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, wherein:

[0016] Figure 1 This is a schematic diagram of the center hole of the output shaft of the wind power generator gearbox in this utility model.

[0017] Figure 2 for Figure 1 Cross-sectional view of the central hole.

[0018] Reference numerals: 1- Output shaft of wind turbine gearbox; 2- Center hole; 3- Helical groove. Detailed Implementation

[0019] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this utility model. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0020] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the present invention. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0021] The same or similar reference signs in the drawings of the embodiments of the present application correspond to the same or similar components; in the description of the present application, it should be understood that if the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "back" and the like are based on the orientations or positional relationships shown in the drawings, they are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationships in the drawings are only used for exemplary illustration, and cannot be understood as a limitation on the present application, for those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0022] Please refer to Figures 1-2 The present application relates to a kind of center hole structure of wind power gear box output shaft, the one end or both ends of the wind power gear box output shaft 1 is provided with center hole 2.The center hole 2 is C type center hole 2, and the inner taper surface for cooperating with the nose is provided with helical groove 3, and helical groove 3 can be provided with one or two.Helical groove 3 connects the large end and the small end of inner taper surface.

[0023] When the inner taper surface of center hole 2 or the outer conical surface of the nose matched therewith is attached with foreign matter not cleaned up, in the relative rotation of inner and outer conical surface, foreign matter will enter the helical groove 3 opened on the inner conical surface of center hole 2, avoid the influence of product processing quality caused by the existence of foreign matter.

[0024] At the same time, lubricating oil or coolant can enter the conical surface along the helical groove 3 opened on the inner conical surface of center hole 2, play lubricating and cooling effect, further improve product processing quality and the durability of nose.

[0025] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and not limited, although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced, without departing from the purpose and scope of the present technical solutions, which should be covered in the scope of the claims of the present application.

Claims

1. A center bore configuration for a wind power gearbox output shaft, the center bore being a C- shaped center bore, characterized in that: The inner conical surface on the center hole for cooperating with the center is provided with a helical groove; the helical groove has one or more; the helical groove is connected through the large end and the small end of the inner conical surface.

2. The center bore structure of a wind power generation gearbox output shaft according to claim 1, characterized in that: One end or both ends of the output shaft of the wind power gear box is provided with the center hole.

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