A wind power gearbox

Abstract

The present invention relates to the technical field of gearboxes, and discloses a wind power gearbox, comprising: a planetary gear train, one end of the sun gear of the planetary gear train is provided with a journal, and the end surface of the journal is provided with a first meshing tooth; a secondary gear train, the secondary gear train comprises an input shaft, and the end surface of the input shaft is provided with a second meshing tooth, and the second meshing tooth meshes with the first meshing tooth; a connection structure, comprising an axial connection member, one end of the axial connection member is connected to the journal, and the other end is connected to the input shaft. Through the above structure, the wind power gearbox connection structure can reduce the axial space occupied by the shaft system, improve the utilization rate of materials, and reduce costs.

Description

Technical Field

[0001] The present invention relates to the technical field of gear boxes, and in particular to a wind power gear box. Background Art

[0002] In a wind turbine, the speed of the wind rotor is very low, far from the speed required for the generator to generate electricity. The speed increase of the wind turbine gearbox is necessary to make the generator obtain the corresponding speed. As an important core component, the wind turbine gearbox plays a vital role in wind power equipment.

[0003] Wind turbine gearboxes usually adopt a structure of a first-stage planetary gear train plus a two-stage parallel gear train or a structure of a two-stage planetary gear plus a first-stage parallel gear train. Among them, a connection mechanism needs to be set between each gear train to transmit power between different levels of gear trains. In addition, due to the large torque transmission, complex working conditions and high reliability requirements of wind turbine gearboxes, the connection mechanism between different gear trains of wind turbine gearboxes must not only have high torque transmission capacity and reliability, but also ensure good transmission stability to meet the performance requirements of the wind turbine gearbox as a whole.

[0004] At present, the various gear trains of the existing wind turbine gearbox are usually connected by splines. The end face of the sun gear in the planetary gear train is provided with an external spline, and the planetary carrier or gear shaft of the other gear train is provided with an internal spline. The power transmission between the two gear trains is realized through the matching connection of the internal and external splines. Since the spline transmits the load between the two gear trains, in order to ensure that the spline has a sufficient safety factor, the spline needs to be designed with a sufficient tooth width. The internal and external splines not only occupy a certain axial space, but also increase the material cost of the sun gear and the other gear train shaft. Summary of the invention

[0005] An object of the present invention is to provide a wind turbine gearbox, in which the axial space occupied by the shaft system is small, thereby improving the utilization rate of materials and reducing costs.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A wind power gearbox comprises: a planetary gear train, wherein a journal is provided at one end of a sun gear of the planetary gear train, and a first meshing tooth is provided on the end face of the journal; a secondary gear train, wherein the secondary gear train comprises an input shaft, and a second meshing tooth is provided on the end face of the input shaft, and the second meshing tooth meshes with the first meshing tooth; and a connecting structure, comprising an axial connecting member, wherein one end of the axial connecting member is connected to the journal, and the other end is connected to the input shaft.

[0008] As a preferred solution of a wind turbine gearbox, the wind turbine gearbox also includes a locking bolt, the axial connector is provided with a connecting hole, and the locking bolt passes through the connecting hole to connect the axial connector to the end face of the shaft neck or the end face of the input shaft.

[0009] As a preferred solution of a wind power gearbox, a first bolt hole is provided on the end surface of the input shaft, and the locking bolt is connected to the first bolt hole.

[0010] As a preferred solution of a wind power gearbox, a positioning protrusion is provided at one end of the axial connecting member away from the input shaft, a positioning groove is provided on the shaft neck, and the positioning protrusion is inserted into the positioning groove.

[0011] As a preferred solution of a wind power gearbox, a positioning portion is provided on the shaft journal, and the positioning groove is opened on the outer peripheral surface of the positioning portion.

[0012] As a preferred solution for a wind turbine gearbox, the axial width of the positioning groove is greater than the axial width of the positioning protrusion.

[0013] As a preferred solution for a wind turbine gearbox, the axial connecting member includes two first pressure plates and one second pressure plate, the two first pressure plates are buckled together to form a first connecting hole, a second connecting hole is arranged on the second pressure plate opposite to the first connecting hole, the shaft neck is passed through the first connecting hole and the second connecting hole, and the locking bolt is sequentially connected to the second pressure plate, the first pressure plate and the input shaft.

[0014] As a preferred solution of a wind power gearbox, a second bolt hole is provided on the end surface of the journal, and the locking bolt is connected to the second bolt hole.

[0015] As a preferred solution for a wind turbine gearbox, a limiting protrusion is provided at one end of the axial connecting member away from the shaft neck, a limiting groove is formed between the limiting protrusion and the end face of the shaft neck, a limiting convex ring is provided in the inner cavity of the input shaft, and the limiting protrusion is inserted into the limiting groove.

[0016] As a preferred solution for a wind power gearbox, the axial width of the limiting groove is greater than the axial width of the limiting protrusion.

[0017] Beneficial effects of the present invention:

[0018] The present invention provides a wind power gearbox, which includes a planetary gear train, a secondary gear train and a connection structure. One end of the sun gear of the planetary gear train is provided with a journal. The secondary gear train includes an input shaft. The first meshing teeth on the end face of the journal mesh with the second meshing teeth on the end face of the input shaft. The connection structure includes an axial connector, one end of the axial connector is connected to the journal, and the other end of the axial connector is connected to the input shaft. The journal and the input shaft are axially connected. The first meshing teeth and the second meshing teeth meshing with each other make the sun gear and the input shaft transmission connected, which is convenient for the transmission of torque in the wind power gearbox. Through the above structure, the connection between the journal of the sun gear and the input shaft does not need to be provided with an internal spline or an external spline, which reduces the axial space occupied by the shaft system in the wind power gearbox, improves the utilization rate of materials, and is conducive to reducing the cost of the wind power gearbox. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a cross-sectional view of the wind power gearbox provided in the first embodiment;

[0020] Figure 2 yes Figure 1 The enlarged view of point A in the middle;

[0021] Figure 3 is a cross-sectional view of a wind turbine gearbox provided in the second embodiment;

[0022] Figure 4 yes Figure 3 Enlarged view of point B in the middle.

[0023] In the figure:

[0024] 11. Axial connecting member; 111. Positioning protrusion; 112. First pressure plate; 1121. First connecting hole; 113. Second pressure plate; 1131. Second connecting hole; 114. Limiting protrusion; 115. Limiting groove; 2. Locking bolt; 100. Sun gear; 101. Journal; 1011. Positioning groove; 1012. Second bolt hole; 102. Positioning part; 200. Input shaft; 201. First bolt hole; 202. Limiting convex ring; 300. Planet carrier; 400. Ring gear; 500. Planet gear. DETAILED DESCRIPTION

[0025] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0026] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0028] The technical solution of the wind power gearbox provided by the present invention is further explained below with reference to the accompanying drawings and through specific embodiments.

[0029] Embodiment 1

[0030] This embodiment provides a wind turbine gearbox, which includes a planetary gear train, a secondary gear train and a connection structure. In this embodiment, the planetary gear train is used as a primary gear train, and the torque on the planetary gear train needs to be transmitted to the secondary gear train, such as Figure 1 and Figure 2 As shown, the planetary gear train includes a planet carrier 300, a ring gear 400, a planetary gear 500 and a sun gear 100. A journal 101 is provided at one end of the sun gear 100. The secondary gear train includes an input shaft 200. A first meshing tooth is provided on the end face of the journal 101. A second meshing tooth is provided on the end face of the input shaft 200. The second meshing tooth meshes with the first meshing tooth. The planet carrier 300 serves as the load input end of the planetary gear train. The load is output from the sun gear 100 as the output end after being transmitted through the planetary gear train, and is transmitted to the input shaft 200 after passing through the first meshing tooth and the second meshing tooth that mesh with each other.

[0031] like Figure 2 As shown, the connection structure includes an axial connection member 11, one end of which is connected to the journal 101, and the other end of which is connected to the input shaft 200. With the above structure, it is no longer necessary to set an internal spline or an external spline at the connection between the journal 101 of the sun gear 100 and the input shaft 200, which can reduce the axial space occupied by the shaft system, improve the utilization rate of materials, and thus reduce the cost of the wind power gearbox.

[0032] Specifically, the wind turbine gearbox also includes a locking bolt 2, and a connecting hole is provided on the axial connecting member 11, which is a through hole. After the locking bolt 2 passes through the connecting hole, the axial connecting member 11 is connected to the end face of the shaft neck 101 or the end face of the input shaft 200, so that the connecting assembly 1 connects the sun gear 100 and the input shaft 200.

[0033] Preferably, a first bolt hole 201 is provided on the end surface of the input shaft 200 , and the locking bolt 2 passes through the connecting hole and is connected to the first bolt hole 201 , so as to connect the axial connecting member 11 to the input shaft 200 .

[0034] In this embodiment, a positioning protrusion 111 is provided at one end of the axial connection member 11 away from the input shaft 200, and a positioning groove 1011 is provided on the journal 101. The positioning protrusion 111 is inserted into the positioning groove 1011 to achieve the axial connection between the journal 101 and the output shaft. Specifically, a positioning portion 102 is provided on the journal 101, and the positioning groove 1011 is opened on the outer peripheral surface of the positioning portion 102. When the axial connection member 11 is sleeved on the positioning portion 102, the positioning protrusion 111 is inserted into the positioning groove 1011 to achieve the connection between the axial connection member 11 and the journal 101.

[0035] Preferably, the axial width of the positioning groove 1011 is greater than the axial width of the positioning protrusion 111, that is, there is a gap between the positioning protrusion 111 and the inner wall of the positioning groove 1011 to ensure that the sun gear 100 has a suitable floating amount during the meshing process with the planetary gear 500. It should be noted that the gap between the positioning protrusion 111 and the inner wall of the positioning groove 1011 must be reasonably calculated to ensure that the sun gear 100 has sufficient floating amount when working.

[0036] In this embodiment, the axial connecting member 11 includes two first pressure plates 112, and the positioning protrusion 111 is arranged at the end of the first pressure plate 112 away from the input shaft 200. The shape of the first pressure plate 112 is semi-annular, the positioning groove 1011 is an annular groove, and the positioning protrusion 111 is an annular protrusion. The two first pressure plates 112 are buckled to form a complete annular sleeve with a first connecting hole 1121 on the positioning portion 102, so that the connection between the axial connecting member 11 and the shaft neck 101 is firm and stable. Preferably, the axial connecting member 11 also includes a second pressure plate 113, the shape of the second pressure plate 113 is annular, and a second connecting hole 1131 is provided on the second pressure plate 113 opposite to the first connecting hole 1121. The second pressure plate 113 is sleeved on the positioning portion 102 through the second connecting hole 1131, and the locking bolt 2 is connected to the second pressure plate 113, the first pressure plate 112 and the input shaft 200 in sequence, and can press the second pressure plate 113 onto the first pressure plate 112 to prevent the first pressure plate 112 from falling off the positioning portion 102.

[0037] Embodiment 2

[0038] like Figure 3 and Figure 4 As shown, the wind turbine gearbox provided in this embodiment is different from that in the first embodiment in that a second bolt hole 1012 is provided on the end face of the shaft neck 101 provided in this embodiment, and the locking bolt 2 is connected to the second bolt hole 1012 to connect the axial connecting member 11 to the shaft neck 101.

[0039] like Figure 4 As shown, in this embodiment, a limiting protrusion 114 is provided at one end of the axial connecting member 11 away from the shaft neck 101, and a limiting groove 115 is formed between the limiting protrusion 114 and the end surface of the shaft neck 101. A limiting protrusion ring 202 is provided in the inner cavity of the input shaft 200, and the limiting protrusion 114 is inserted into the limiting groove 115 to realize the connection between the axial connecting member 11 and the input shaft 200.

[0040] Preferably, the axial width of the limiting groove 115 is greater than the axial width of the limiting protrusion 114, that is, there is a gap between the limiting protrusion 114 and the inner wall of the limiting groove 115 to ensure that the sun gear 100 has a suitable floating amount during the meshing process with the planetary gear 500. It should be noted that the gap between the limiting protrusion 114 and the inner wall of the limiting groove 115 must be reasonably calculated to ensure that the sun gear 100 has sufficient floating amount when working.

[0041] In this embodiment, the limiting protrusion 114 is an annular protrusion, so that the limiting groove 115 formed between the limiting protrusion 114 and the end face of the shaft neck 101 is an annular groove, so that when the limiting protrusion 202 is inserted into the limiting groove 115, the connection between the axial connecting member 11 and the input shaft 200 is firm and stable.

[0042] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A wind power gearbox, characterized in that: include: A planetary gear train, wherein a sun gear (100) of the planetary gear train has a journal (101) at one end, and a first meshing tooth is provided on an end surface of the journal (101); A secondary gear train, the secondary gear train comprising an input shaft (200), the end surface of the input shaft (200) being provided with second meshing teeth, the second meshing teeth meshing with the first meshing teeth, the first meshing teeth and the second meshing teeth meshing with each other enabling the sun gear (100) to be transmission-connected with the input shaft (200), thereby facilitating the transmission of torque; A connection structure, comprising an axial connection member (11), one end of the axial connection member (11) being connected to the journal (101), and the other end of the axial connection member (11) being connected to the input shaft (200); A limiting protrusion (114) is provided at one end of the axial connecting member (11) away from the shaft neck (101), a limiting groove (115) is formed between the limiting protrusion (114) and the end surface of the shaft neck (101), a limiting convex ring (202) is provided in the inner cavity of the input shaft (200), and the limiting convex ring (202) is inserted into the limiting groove (115); The axial width of the limiting groove (115) is greater than the axial width of the limiting protruding ring (202).

2. The wind turbine gearbox according to claim 1, characterized in that: It also includes a locking bolt (2), and a connecting hole is provided on the axial connecting piece (11). The locking bolt (2) passes through the connecting hole to connect the axial connecting piece (11) to the end surface of the shaft neck (101).

3. The wind turbine gearbox according to claim 2, characterized in that: A second bolt hole (1012) is provided on the end surface of the journal (101), and the locking bolt (2) is connected to the second bolt hole (1012).

4. A wind power gearbox, characterized in that: include: A planetary gear train, wherein a sun gear (100) of the planetary gear train has a journal (101) at one end, and a first meshing tooth is provided on an end surface of the journal (101); A secondary gear train, the secondary gear train comprising an input shaft (200), the end surface of the input shaft (200) being provided with second meshing teeth, the second meshing teeth meshing with the first meshing teeth, the first meshing teeth and the second meshing teeth meshing with each other enabling the sun gear (100) to be transmission-connected with the input shaft (200), thereby facilitating the transmission of torque; A connection structure, comprising an axial connection member (11), one end of the axial connection member (11) being connected to the journal (101), and the other end of the axial connection member (11) being connected to the input shaft (200); A positioning protrusion (111) is provided at one end of the axial connecting member (11) away from the input shaft (200), a positioning groove (1011) is provided on the shaft neck (101), and the positioning protrusion (111) is inserted into the positioning groove (1011).

5. The wind turbine gearbox according to claim 4, characterized in that: It also includes a locking bolt (2), the axial connecting member (11) is provided with a connecting hole, and the locking bolt (2) passes through the connecting hole to connect the axial connecting member (11) to the end surface of the input shaft (200).

6. The wind turbine gearbox according to claim 4, characterized in that: The shaft neck (101) is provided with a positioning portion (102), and the positioning groove (1011) is opened on the outer peripheral surface of the positioning portion (102).

7. The wind turbine gearbox according to claim 4, characterized in that: The axial width of the positioning groove (1011) is greater than the axial width of the positioning protrusion (111).

8. The wind turbine gearbox according to claim 5, characterized in that: A first bolt hole (201) is provided on the end surface of the input shaft (200), and the locking bolt (2) is connected to the first bolt hole (201).

9. The wind turbine gearbox according to claim 5, characterized in that: The axial connecting member (11) comprises two first pressure plates (112) and one second pressure plate (113); the two first pressure plates (112) are buckled together to form a first connecting hole (1121); a second connecting hole (1131) is arranged on the second pressure plate (113) opposite to the first connecting hole (1121); the shaft neck (101) is passed through the first connecting hole (1121) and the second connecting hole (1131); and the locking bolt (2) is sequentially connected to the second pressure plate (113), the first pressure plate (112) and the input shaft (200).

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