Hub and gearbox integrated wind generating set transmission structure
By integrating the hub with the three-row column main bearing, the problem of excessively long main shaft length in wind turbines is solved, resulting in weight reduction and cost reduction, lower wind turbine damage rate, and improved assembly efficiency.
Patent Information
- Application Number
- CN202511460121.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-14
- Publication Date
- 2025-11-18
AI Technical Summary
In existing wind turbines, the main shaft system is too long and too heavy, requiring high precision in machining and assembly, which leads to a high risk of damage and high cost.
The hub is integrated with the three-row column main bearing and connected by high-strength bolts, which shortens the shaft length, reduces weight and lowers the machining accuracy requirements. The three-row column main bearing is connected to the planetary carrier of the gearbox speed increaser.
This resulted in a shaft shortening of at least 3 meters, a 35% weight reduction, a 20% cost reduction, a lower fan damage rate, improved assembly efficiency, and lower costs.
Smart Images
Figure CN120969102A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of wind power generation equipment, in particular to a wind turbine generator system transmission structure integrating a hub and a gear box. BACKGROUND
[0002] In the prior art of wind power generators, the hub is basically connected to the main shaft, but the main shaft and the hub end linkage have the disadvantage that the main shaft system has an axial length of at least 3 meters, the main shaft system includes main bearings, a main shaft, and bearing seat components, all of which have diameters of more than 2 meters, and the weight is more than 100 tons. In order to ensure that the main shaft system cannot be eccentric or have high coaxiality, the machining and assembly precision of the shaft system components must be extremely high, within a range of 0.1 mm precision or even higher. For a wind power large outdoor equipment with a weight of several hundred tons, this is not the best technical route. Because the shaft system is more than 3 meters, in addition to physical changes in each component, the shaft system also bears radial overload damage. According to reports from wind power equipment with the same technology, the damage risk probability is extremely high. SUMMARY
[0003] The purpose of the present application is to provide a wind turbine generator system transmission structure integrating a hub and a gear box to solve the above problems.
[0004] To solve the above technical problems, the present application adopts the following technical scheme:
[0005] The present application relates to a wind turbine generator system transmission structure integrating a hub and a gear box, comprising a generator and a gear box connected to the generator, characterized in that the gear box comprises an outer shell and a transmission mechanism installed inside the outer shell, the outer shell comprises an upper half shell and a lower half shell, the upper half shell and the lower half shell are tightly connected by high-strength bolts, the other end of the gear box is connected with three-row cylindrical main bearings, the three-row cylindrical main bearings are connected with a hub, and the hub is installed with blades.
[0006] Further, the outer side of the outer ring of the three-row cylindrical main bearing is connected with the hub, and the inner ring of the three-row cylindrical main bearing is connected with the planet carrier of the gear box speed increaser.
[0007] Further, the inner side of the outer ring of the three-row cylindrical main bearing is connected with the inner ring gear of the gear box through high-strength bolts.
[0008] Further, the end of the hub is fitted into the outer side of the outer ring of the three-row cylindrical main bearing and is fixedly connected by high-strength bolts.
[0009] Further, the inner ring of the three-row cylindrical main bearing is connected with the planet carrier of the gear box speed increaser through high-strength bolts.
[0010] Further, one end of the wheel hub is connected with the inner ring of the three-row cylindrical main bearing and the planet carrier of the gear box, at this time the inner ring gear of the gear box is fixed, and a single-row tapered roller bearing (TRB), a self-aligning roller bearing (SRB) or a circular-roller bearing (CARB) is installed at the rear end of the gear box for axial bearing.
[0011] Further, the wheel hub is connected with the inner ring of the three-row cylindrical main bearing and the planet carrier of the gear box through high-strength bolts.
[0012] Further, one end of the wheel hub is connected with the inner ring of the three-row cylindrical main bearing and the inner ring gear of the gear box, at this time the planet carrier of the gear box is fixed, and a single-row tapered roller bearing (TRB) is installed at the rear end of the gear box for axial bearing.
[0013] Further, the wheel hub is connected with the inner ring of the three-row cylindrical main bearing and the inner ring gear of the gear box through high-strength bolts.
[0014] Compared with the prior art, the beneficial technical effects of the present application are:
[0015] The present application embeds and fixedly connects the wheel hub and the three-row cylindrical main bearing, integrates the wheel hub on the three-row cylindrical main bearing, no longer has assembly and machining precision problems, shortens the entire shafting by at least 3 meters, reduces the weight by 35%, reduces the cost by 20%, and has excellent radial and axial bearing, while reducing the damage rate of the fan. BRIEF DESCRIPTION OF DRAWINGS
[0016] The present application will be further described below in combination with the description of the drawings.
[0017] Figure 1 is a cross-sectional view of embodiment one;
[0018] Figure 2 is a cross-sectional view of embodiment two;
[0019] Figure 3 is a cross-sectional view of embodiment three;
[0020] Explanation of reference signs: 1, generator; 2, gear box; 3, three-row cylindrical main bearing; 4, wheel hub; 5, planet carrier; 6, inner ring gear. DETAILED DESCRIPTION
[0021] Embodiment one
[0022] As Figure 1As shown, a wind turbine generator transmission structure integrating a hub and gearbox includes a generator 1 and a gearbox 2 connected to the generator 1. The gearbox 2 includes an outer shell and a transmission mechanism installed inside the outer shell. The transmission mechanism is prior art, and its specific structure will not be detailed. The outer shell includes an upper shell and a lower shell, which are tightly connected by high-strength bolts. A three-row column main bearing 3 is connected to the other end of the gearbox 2. The three-row column main bearing 3 is connected to a hub 4, on which blades are mounted.
[0023] The outer ring of the three-row column main bearing 3 is connected to the outer side of the hub 4, and the inner ring of the three-row column main bearing 3 is connected to the planetary carrier of the gearbox speed increaser. The inner side of the outer ring of the three-row column main bearing 3 is connected to the internal gear ring of the gearbox 2 by high-strength bolts. The end of the hub 4 is fitted onto the outer side of the outer ring of the three-row column main bearing 3 and fixedly connected by high-strength bolts. The inner ring of the three-row column main bearing 3 is connected to the planetary carrier of the gearbox speed increaser by high-strength bolts.
[0024] The hub 4 is equipped with blades, which means that the blades, hub 2 and three-row column main bearing 3 are integrated into one unit, eliminating the problems of assembly and machining accuracy. The entire shaft system is shortened by at least 3 meters, the weight is reduced by 35%, and the cost is reduced by 20%.
[0025] Example 2
[0026] like Figure 2 As shown, with other mechanisms remaining unchanged, one end of the hub 4 is connected to the inner ring of the three-row column main bearing 3 and the planetary carrier 5 of the gearbox 2. At this time, the internal gear ring 6 of the gearbox 2 is fixed, and a single-row tapered roller bearing (TRB), self-aligning roller bearing (SRB), or toroidal roller bearing (CARB) for axial load is installed at the rear end of the gearbox 2. The hub 4 is connected to the inner ring of the three-row column main bearing 3 and the planetary carrier 5 of the gearbox 2 by high-strength bolts.
[0027] Example 3
[0028] like Figure 3 As shown, with other mechanisms remaining unchanged, one end of the hub 4 is connected to the inner ring of the three-row column main bearing 3 and the planetary carrier 5 of the gearbox 2. At this time, the internal gear ring 6 of the gearbox 2 is fixed, and a single-row tapered roller bearing (TRB), self-aligning roller bearing (SRB), or toroidal roller bearing (CARB) for axial load is installed at the rear end of the gearbox 2. The hub is connected to the inner ring of the three-row column main bearing 3 and the internal gear ring 6 of the gearbox 2 by high-strength bolts.
[0029] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.
Claims
1. A wind turbine generator transmission structure integrating a hub and a gearbox, comprising a generator (1) and a gearbox (2) connected to the generator (1), characterized in that: The gearbox (2) includes an outer shell and a transmission mechanism installed inside the outer shell. The outer shell includes an upper shell and a lower shell, which are tightly connected by high-strength bolts. A three-row column main bearing (3) is connected to the other end of the gearbox (2). The three-row column main bearing (3) is connected to a hub (4), and blades are installed on the hub (4).
2. The wind turbine generator transmission structure integrating the hub and gearbox according to claim 1, characterized in that: The outer ring of the three-row column main bearing (3) is connected to the hub (4), and the inner ring of the three-row column main bearing (3) is connected to the planetary carrier of the gearbox speed increaser.
3. The wind turbine generator transmission structure integrating the hub and gearbox according to claim 2, characterized in that: The outer ring of the three-row main bearing (3) is connected to the inner gear ring of the gearbox (2) by high-strength bolts.
4. The wind turbine generator transmission structure integrating the hub and gearbox according to claim 3, characterized in that: The end of the hub (4) is fitted into the outer ring of the three-row main bearing (3) and fixedly connected by high-strength bolts.
5. The wind turbine generator transmission structure integrating the hub and gearbox according to claim 4, characterized in that: The inner ring of the three-row column main bearing (3) is connected to the planetary carrier of the gearbox speed increaser by high-strength bolts.
6. The wind turbine generator transmission structure integrating the hub and gearbox according to claim 1, characterized in that: One end of the hub (4) is connected to the inner ring of the three-row column main bearing (3) and the planetary carrier (5) of the gearbox (2). At this time, the internal gear ring (6) of the gearbox (2) is fixed. The rear end of the gearbox (2) is equipped with a single-row tapered roller bearing (TRB), self-aligning roller bearing (SRB) or annular roller bearing (CARB) for axial load bearing.
7. The wind turbine generator transmission structure integrating the hub and gearbox according to claim 6, characterized in that: The hub (4) is connected to the inner ring of the three-row main bearing (3) and the planetary carrier (5) of the gearbox (2) by high-strength bolts.
8. The wind turbine generator transmission structure integrating the hub and gearbox according to claim 1, characterized in that: One end of the hub (4) is connected to the inner ring of the three-row column main bearing (3) and the internal gear ring (6) of the gearbox (2). At this time, the planet carrier (5) of the gearbox (2) is fixed, and a single-row tapered bearing for axial bearing is installed at the rear end of the gearbox (2).
9. The wind turbine generator transmission structure integrating the hub and gearbox according to claim 8, characterized in that: The hub is connected to the inner ring of the three-row column main bearing (3) and the internal gear ring (6) of the gearbox (2) by high-strength bolts.