Wind power gear box

Abstract

The utility model discloses a wind power gear box which comprises an installation box body, a gear box body and a gear box body, the planet assembly comprises an inner gear ring, a planet carrier, planet wheels and a sun wheel, the inner gear ring is connected to one side of the mounting box body, the planet carrier is arranged in the inner gear ring, at least one part of the planet carrier is mounted in the mounting cavity, the planet wheels comprise multiple sets of planet wheels which are arranged on the planet carrier and meshed with inner teeth of the inner gear ring at the same time, and the sun wheel is arranged in the mounting cavity. The sun gear is arranged among the plurality of planet gears; and the limiting assembly is connected with the mounting box body and the planet carrier so that the planet carrier can be limited in the circumferential direction and the axial direction. The planet carrier is axially and circumferentially limited by arranging the limiting assembly, hole alignment during assembly is facilitated, and the assembly efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wind turbine sets, in particular to a wind turbine gear box. Background Art

[0002] The fully integrated wind turbine transmission chain mainly includes a wind turbine gearbox and a main shaft system. The wind turbine gearbox mainly includes a primary planetary gear train and a secondary planetary gear train. The primary planetary gear train mainly includes structures such as a planetary carrier, planetary wheels and an inner gear ring. The main shaft system mainly includes structures such as a main shaft, a bearing seat, an upwind bearing and a downwind bearing. The connection between the main shaft system and the gearbox is mainly the connection between the planetary carrier and the main shaft, and the connection between the bearing seat and the inner gear ring. In the prior art, when the wind turbine gearbox is assembled with the main shaft, there is no circumferential and axial position limit, which makes it inconvenient to align the holes and affects the assembly efficiency. At the same time, there is a risk of instability during lifting and transportation. Before the wind turbine gearbox is assembled with the main shaft, the planetary carrier has no radial support. If it falls directly on the inner gear ring, there is a risk of tooth surface crushing. Utility Model Content

[0003] In order to solve the deficiencies of the prior art, the present application provides a wind turbine gearbox, comprising:

[0004] An installation box has an installation space inside;

[0005] A planetary assembly, comprising an inner gear ring, a planet carrier, planetary gears and a sun gear, wherein the inner gear ring is connected to one side of the mounting box, the planet carrier is arranged inside the inner gear ring and at least a part of it is installed in the mounting cavity, the planetary gears include a plurality of groups of inner teeth arranged on the planet carrier and meshing with the inner gear ring at the same time, and the sun gear is arranged between the plurality of the planetary gears;

[0006] A limiting assembly connects the mounting box and the planet carrier to limit the planet carrier in circumferential and axial directions.

[0007] Furthermore, the limiting assembly includes a plurality of limiting bolts, and a plurality of bolt holes corresponding to positions are circumferentially spaced apart on the planet carrier and the mounting box, and the limiting bolts are arranged in the bolt holes.

[0008] Furthermore, the diameter of the bolt hole on the mounting box is greater than the diameter of the bolt hole on the planet carrier.

[0009] Furthermore, the bolt holes are arranged in 4-8 groups circumferentially.

[0010] Furthermore, an outer stop is circumferentially arranged on the connecting end surface between one side of the planet carrier and the mounting box, and an outer stop is circumferentially arranged inside the mounting box.

[0011] Furthermore, the planetary gears are arranged in six groups in the circumferential direction and are connected to the planetary carrier via bearings.

[0012] Furthermore, first sealing grooves are respectively provided on both side end surfaces of the inner gear ring, and first sealing rings are arranged in the first sealing grooves.

[0013] Furthermore, a connecting boss is arranged on the other side of the planet carrier, a second sealing groove is circumferentially opened on the connecting end surface of the connecting boss, and a second sealing ring is arranged in the second sealing groove.

[0014] Furthermore, a plurality of connection holes are circumferentially provided on the connection end surface of the connection boss, and the second sealing ring includes two groups respectively arranged on the inner and outer sides of the connection holes.

[0015] Furthermore, a third sealing groove is circumferentially provided on the side wall of the connecting boss close to the connecting end surface, and a third sealing ring is arranged in the third sealing groove.

[0016] The benefits of the present application are as follows: the provided wind power gearbox supports the planetary carrier by arranging external and internal stoppers on the planetary carrier and the mounting box, thereby avoiding the risk of the planetary carrier falling directly on the inner gear ring and causing tooth surface crushing; the planetary carrier is limited axially and circumferentially by limit bolts, which facilitates hole alignment during assembly and improves assembly efficiency; and the sealing performance of the product is improved by arranging multiple sealing rings on the inner gear ring and the planetary carrier. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of an embodiment of a wind power gearbox of the present application;

[0018] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0019] Figure 3 for Figure 1 Schematic diagram of the structure of the middle-level planetary assembly;

[0020] Figure 4 for Figure 3 Schematic diagram of the structure of the middle-level planet carrier;

[0021] Figure 5 for Figure 4 Another perspective structural diagram;

[0022] Figure 6 for Figure 1 Schematic diagram of the structure of the middle-stage internal gear ring.

[0023] Markings in the figure are: 10, first-stage planetary carrier, 101, first bolt hole, 102, outer stop, 103, installation port, 11, first-stage inner gear ring, 111, first sealing groove, 12, front installation box, 121, second bolt hole, 122, inner stop, 13, connecting boss, 131, connecting hole, 132, second inner sealing groove, 133, second outer sealing groove, 134, third sealing groove, 14, second-stage planetary assembly, 15, rear installation box, 16, third-stage planetary assembly, 17, motor front cover, 18, motor bearing seat, 19, limit bolt, 20, first-stage planetary gear, 21, first-stage sun gear. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0026] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0027] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0028] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0030] See also Figure 1-Figure 6 The present embodiment provides a wind power gearbox, including a first-stage planetary assembly, a front mounting box 12, a second-stage planetary assembly 14, a rear mounting box 15, a third-stage planetary assembly 16, a motor front cover 17 and a motor bearing seat 18, which are arranged in sequence. Since the second-stage planetary assembly 14 and the third-stage planetary assembly 16 have substantially the same structure as the first-stage planetary assembly, only the first-stage planetary assembly is introduced in this embodiment.

[0031] Specifically, the primary planetary assembly includes a primary planet carrier 10 and a primary inner gear ring 11. Six groups of mounting openings 103 are provided on the primary planet carrier 10 in a circumferential direction. A primary planetary gear 20 is arranged in each mounting opening 103 through a bearing. The six primary planetary gears are meshed with the inner teeth of the primary inner gear ring 11 at the same time. A primary sun gear 21 is arranged between the six primary planetary gears 20. The front mounting box 23 has a mounting space. At least a part of the primary planet carrier 21 is mounted in the front mounting box 23. The upwind end surface of the primary planet carrier ( Figure 1 The left end face shown) is used for connection to the spindle of the spindle system.

[0032] In order to prevent the primary planetary carrier 10 and the front mounting box 12 from rotating relative to each other in the circumferential direction, six groups of first bolt holes 101 are circumferentially spaced apart on the primary planetary carrier 10, and six groups of second bolt holes 121 are circumferentially spaced apart on the front mounting box 12 at positions corresponding to the first bolt holes. Limiting bolts 19 are arranged in the two limiting threaded holes. Preferably, the diameter of the second bolt hole 121 is larger than the diameter of the first bolt hole 101.

[0033] In order to prevent the planet carrier from falling directly onto the inner gear ring and thus causing the risk of crushing the tooth surface, an outer stop 102 is circumferentially arranged on the downwind end surface of the first-stage planet carrier 10, and an inner stop 122 is circumferentially arranged on the inner circumference of the front mounting box 12, so that the front mounting box 12 supports most of the weight of the first-stage planetary assembly.

[0034] Since the wind turbine gearbox is connected to the main shaft system, considering the impact of lubricating oil leakage on the environment, it is necessary to improve the overall sealing performance of the wind turbine gearbox. First, the two sides of the first-stage inner gear ring 11 are respectively connected to the front mounting box 12 and the bearing seat of the main shaft system. Therefore, first sealing grooves 111 are respectively opened on the end faces of both sides of the inner gear ring, and a first sealing ring is arranged in the first sealing groove 111.

[0035] Secondly, the upwind end face of the first-stage planetary carrier 10 is connected to the main shaft of the main shaft system, and a connecting boss 13 is arranged on the first-stage planetary carrier 10 as a connecting structure with the main shaft. A plurality of connecting holes 131 are circumferentially opened on the connecting end face of the connecting boss 13 for connecting with the main shaft through studs, and a second inner sealing groove 132 and a second outer sealing groove 133 are respectively opened on the inner and outer sides of the connecting hole, and a second sealing ring is arranged in each of the second inner sealing groove 132 and the second outer sealing groove 133, and two groups of third sealing grooves 134 are circumferentially opened in parallel on the side wall of the connecting boss close to the connecting end face, and a third sealing ring is arranged in the third sealing groove.

[0036] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A wind power gearbox, characterized in that: include: An installation box has an installation space inside; A planetary assembly, comprising an inner gear ring, a planet carrier, planetary gears and a sun gear, wherein the inner gear ring is connected to one side of the mounting box, the planet carrier is arranged inside the inner gear ring and at least a part of it is installed in the mounting cavity, the planetary gears include a plurality of groups of inner teeth arranged on the planet carrier and meshing with the inner gear ring at the same time, and the sun gear is arranged between the plurality of the planetary gears; A limiting assembly connects the mounting box and the planet carrier to limit the planet carrier in circumferential and axial directions.

2. A wind turbine gearbox according to claim 1, characterized in that: The limiting assembly includes a plurality of limiting bolts. The planet carrier and the mounting box are provided with a plurality of bolt holes corresponding to the positions spaced apart from each other circumferentially, and the limiting bolts are arranged in the bolt holes.

3. A wind turbine gearbox according to claim 2, characterized in that: The diameter of the bolt hole on the mounting box is greater than the diameter of the bolt hole on the planet carrier.

4. A wind power gearbox according to claim 3, characterized in that: The bolt holes are arranged in 4 to 8 groups in the circumferential direction.

5. A wind turbine gearbox according to claim 1, characterized in that: An outer stop is circumferentially arranged on the connecting end surface of one side of the planet carrier and the mounting box, and an outer stop is circumferentially arranged inside the mounting box.

6. A wind turbine gearbox according to claim 1, characterized in that: The planetary gears are arranged in six groups in the circumferential direction and are connected to the planetary carrier via bearings.

7. A wind turbine gearbox according to claim 1, characterized in that: First sealing grooves are respectively provided on both side end surfaces of the inner gear ring, and first sealing rings are arranged in the first sealing grooves.

8. A wind power gearbox according to claim 5, characterized in that: A connecting boss is arranged on the other side of the planet carrier, a second sealing groove is circumferentially arranged on the connecting end surface of the connecting boss, and a second sealing ring is arranged in the second sealing groove.

9. A wind turbine gearbox according to claim 8, characterized in that: A plurality of connection holes are circumferentially formed on the connection end surface of the connection boss, and the second sealing ring includes two groups respectively disposed on the inner and outer sides of the connection holes.

10. A wind power gearbox according to claim 8, characterized in that: A third sealing groove is circumferentially formed on the side wall of the connecting boss close to the connecting end surface, and a third sealing ring is arranged in the third sealing groove.

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