Integrated transmission chain structure of wind generating set

Abstract

The utility model discloses an integrated transmission chain structure of a wind generating set. The integrated transmission chain structure comprises a main shaft system, a low-speed gear box and a high-speed gear box, the low-speed gear box is integrated in an inner cavity of the main shaft system, the input end of the low-speed gear box is connected with the main shaft system, and the output end of the low-speed gear box is detachably connected with the high-speed gear box; wherein the low-speed gearbox comprises a first-stage planetary assembly and a second-stage planetary assembly, the main shaft system is connected with the first-stage planetary assembly and the second-stage planetary assembly, and the first-stage planetary assembly is connected with the second-stage planetary assembly; the utility model has the characteristics of small size and light weight, can avoid the problems of poor centering performance, large torsional deformation, long power transmission path, large main shaft deflection and difficulty in transportation and maintenance of the transmission chain of the wind generating set, and improves the reliability and efficiency of the transmission chain and the convenience in production, transportation and maintenance.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission chains of wind generator sets, in particular to an integrated transmission chain structure of a wind generator set. Background Art

[0002] The transmission chain of wind turbine generator sets in the prior art is based on the decentralized serial transmission chain of the original doubly fed model, and is derived from a simple integrated optimization design, such as the structure described in Chinese invention patent application CN118274074A. Related transmission chains with similar structures are currently facing many technical iteration difficulties: the gearbox is relatively independent of the main shaft system, which causes the transmission chain to be heavy and the axial dimension to be too long, resulting in difficulties in transportation and lifting, poor system torsional stiffness, and other problems, and thus there are problems such as heavy weight, large axial dimension, difficulty in transportation, and difficulty in reducing costs; and an overly compact transmission chain, such as the highly integrated structure described in Chinese utility model patent CN208010523U, requires high installation precision, which is prone to problems of difficulty in installation and high cost. Utility Model Content

[0003] The purpose of the utility model is to solve the deficiencies in the prior art and provide an integrated transmission chain structure for a wind turbine generator set. The transmission chain structure has the characteristics of small size and light weight. At the same time, it can also avoid the problems of poor neutrality of the transmission chain of the wind turbine generator set, large torsional deformation, long power transmission path, large main shaft deflection, and difficult transportation and maintenance, thereby improving the reliability, efficiency and convenience of production, transportation and maintenance of the transmission chain.

[0004] To achieve the above-mentioned objectives, the technical solution provided by the present invention is: an integrated transmission chain structure of a wind turbine generator set, comprising a main shaft shaft system, a low-speed gearbox and a high-speed gearbox; the low-speed gearbox is integrated in the internal cavity of the main shaft shaft system, the input end of the low-speed gearbox is connected to the main shaft shaft system, and the output end of the low-speed gearbox is detachably connected to the high-speed gearbox; wherein, the low-speed gearbox comprises a first-stage planetary assembly and a second-stage planetary assembly, the main shaft shaft system is connected to the first-stage planetary assembly and the second-stage planetary assembly respectively, and the first-stage planetary assembly is connected to the second-stage planetary assembly.

[0005] Furthermore, the main shaft system includes a main shaft, a main shaft bearing seat, a front main shaft bearing, a rear main shaft bearing, a retaining ring and an adapter flange; the main shaft is supported on the main shaft bearing seat through the front main shaft bearing and the rear main shaft bearing; the retaining ring is connected to the main shaft for axial positioning of the rear main shaft bearing; the main shaft bearing seat is connected to the low-speed gearbox through the adapter flange.

[0006] Furthermore, the first-stage planetary assembly includes a first-stage inner gear ring, a first-stage planetary gear, a first-stage sun gear, a spline shaft, a first-stage planetary carrier and a spline flange; the spline teeth of the first-stage inner gear ring are connected to the main shaft through a retaining ring, the first-stage planetary carrier is fixedly connected to the adapter flange and supports the first-stage planetary gear, the first-stage planetary gear is respectively engaged with the first-stage inner gear ring and the first-stage sun gear, and the first-stage sun gear is connected to the second-stage planetary assembly through a spline shaft and a spline flange.

[0007] Furthermore, the secondary planetary assembly includes a secondary inner ring gear, a secondary planetary gear, a secondary sun gear, an output gear shaft and a secondary planetary carrier; the secondary inner ring gear is connected to the primary sun gear, the secondary planetary carrier is connected to the main shaft by bolts and supports the secondary planetary gear, the secondary planetary gears are respectively engaged with the secondary inner ring gear and the secondary sun gear, and the secondary sun gear is connected to the output gear shaft.

[0008] Furthermore, the output gear shaft is connected to the input end of the high-speed gearbox, and the output end of the high-speed gearbox is connected to the generator of the wind turbine generator set.

[0009] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0010] 1. The low-speed gearbox of the utility model is integrated into the main shaft system and uses the main shaft as its box body, making full use of the structural strength of the main shaft and avoiding strength redundancy; at the same time, the wind power transmitted by the main shaft is divided into two and transmitted to the first and second stages of the low-speed gearbox respectively, reducing the torque transmission pressure of the single stage.

[0011] 2. The high-speed gearbox of the present invention is an independent structure and can be separated from the low-speed gearbox, thereby realizing split transportation and facilitating replacement and maintenance of the high-speed gearbox.

[0012] 3. The utility model is light in weight, the bolt connection safety margin between the gear box and the main shaft is large, and the cost of the gear box and the main shaft system is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the present utility model.

[0014] Figure 2 It is a structural sectional view of the utility model. DETAILED DESCRIPTION

[0015] The present invention will be further described below with reference to specific embodiments.

[0016] See also Figures 1 to 2As shown, the integrated transmission chain structure of the wind turbine generator set provided by this embodiment includes a main shaft shaft system 1, a low-speed gearbox 2 and a high-speed gearbox 3; the low-speed gearbox 2 is integrated in the internal cavity of the main shaft shaft system 1, and the input end of the low-speed gearbox 2 is connected to the main shaft shaft system 1. The low-speed gearbox 2 and the main shaft shaft system 1 constitute an independent transmission chain, which has the characteristics of good sealing, independent disassembly and assembly, independent transportation, and independent lubrication; the output end of the low-speed gearbox 2 is detachably connected to the input end of the high-speed gearbox 3, and the high-speed gearbox 3, as an independent structure, has the characteristics of good sealing, independent disassembly and assembly, independent transportation, and independent lubrication, which plays a role in improving the speed ratio of the transmission chain.

[0017] The main shaft system 1 includes a main shaft 11, a main shaft bearing seat 13, a front main shaft bearing 12, a rear main shaft bearing 14, a retaining ring 15 and an adapter flange 16; the main shaft 11 is supported on the main shaft bearing seat 13 through the front main shaft bearing 12 and the rear main shaft bearing 14; the retaining ring 15 is connected to the main shaft 11, and is used for axial positioning of the rear main shaft bearing 14 and has the function of transmitting torque to the first-stage internal gear ring 211; the main shaft bearing seat 13 is connected to the low-speed gearbox 2 through the adapter flange 16. The overall structure of the main shaft system 1 is a cylindrical structure with a large diameter and a short axis. The diameters of the front main shaft bearing 12 and the rear main shaft bearing 14 are similar. The inner rings of the front main shaft bearing 12 and the rear main shaft bearing 14 are installed on the main shaft 11, and the outer rings of the front main shaft bearing 12 and the rear main shaft bearing 14 are installed on the main shaft bearing seat 13; the main shaft 11 is a large-diameter cylindrical thin-walled structure with a large cavity inside. The diameter of the cavity is larger than the diameter of the first-stage internal gear ring 211 and the second-stage internal gear ring 221 in the low-speed gearbox 2; the main shaft bearing seat 13 is a large-diameter cylindrical thin-walled structure.

[0018] The low-speed gearbox 2 includes a primary planetary assembly and a secondary planetary assembly; the primary planetary assembly includes a primary internal gear ring 211, a primary planetary gear 212, a primary sun gear 213, a spline shaft 214, a primary planetary carrier 215 and a spline flange 216; the spline teeth of the primary internal gear ring 211 are connected to the main shaft 11 through a retaining ring 15, the primary planetary carrier 215 is fixedly connected to the adapter flange 16 and supports the primary planetary gear 212, the primary planetary gear 212 is respectively engaged with the primary internal gear ring 211 and the primary sun gear 213, and the primary sun gear 213 is connected to the secondary planetary assembly through the spline shaft 214 and the spline flange 216; in the primary planetary assembly, the primary internal gear ring 211 is the active component, the primary planetary gear 212 rotates on a fixed axis, and the primary sun gear 213 is the driven component, which transmits the power of the main shaft 11 to the primary sun gear 213 through the primary internal gear ring 211 and the primary planetary gear 212.

[0019] The secondary planetary assembly includes a secondary inner ring gear 221, a secondary planetary gear 222, a secondary sun gear 223, an output gear shaft 224 and a secondary planetary carrier 225; the secondary inner ring gear 221 is connected to the primary sun gear 213, the secondary planetary carrier 225 is connected to the main shaft 11 by bolts and supports the secondary planetary gear 222, the secondary planetary gear 222 is respectively engaged with the secondary inner ring gear 221 and the secondary sun gear 223, and the secondary sun gear 223 is connected to the output gear shaft 224; in the secondary planetary assembly, the secondary inner ring gear 221 and the secondary planetary carrier 225 are both active parts, and the secondary sun gear 223 is a driven part.

[0020] Therefore, the main shaft system is connected to the first-stage planetary assembly and the second-stage planetary assembly respectively, that is, the main shaft 11 is spline-connected to the first-stage inner gear ring 211, and the main shaft 11 is bolted to the second-stage planetary carrier 225; the wind power transmitted by the main shaft 11 is distributed to the first-stage inner gear ring 211 and the second-stage planetary carrier 225 according to a preset ratio, and the specific distribution ratio is calculated based on the number of teeth of each gear of the first-stage planetary assembly and the second-stage planetary assembly.

[0021] The secondary sun gear 223 is connected to the output gear shaft 224, the output gear shaft 224 is connected to the input end of the high-speed gearbox 3, and the output end of the high-speed gearbox 3 is connected to the generator of the wind turbine generator set; thereby, the total wind power from the main shaft 11 is output to the high-speed gearbox 3 through the secondary sun gear 223 and the output gear shaft 224, and the output end of the high-speed gearbox 3 is connected to the generator, transmitting power to the generator to generate electrical energy.

[0022] The wind power absorbed by the impeller system of the wind turbine generator set is transmitted to the low-speed gearbox 2 in two ways according to a preset ratio through the main shaft 11 in the main shaft system 1. The low-speed gearbox 2 transmits the power to the high-speed gearbox 3. The output end of the high-speed gearbox 3 is connected to the generator of the wind turbine generator set, and the generator of the wind turbine generator set generates electrical energy.

[0023] The above-described embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any changes made based on the shape and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. An integrated transmission chain structure for a wind turbine generator set, characterized by: It includes a main shaft system, a low-speed gearbox and a high-speed gearbox; the low-speed gearbox is integrated in the internal cavity of the main shaft system, the input end of the low-speed gearbox is connected to the main shaft system, and the output end of the low-speed gearbox is detachably connected to the high-speed gearbox; wherein, the low-speed gearbox includes a primary planetary assembly and a secondary planetary assembly, the main shaft system is connected to the primary planetary assembly and the secondary planetary assembly respectively, and the primary planetary assembly is connected to the secondary planetary assembly.

2. The integrated transmission chain structure of a wind turbine generator set according to claim 1, characterized in that: The main shaft system includes a main shaft, a main shaft bearing seat, a front main shaft bearing, a rear main shaft bearing, a retaining ring and an adapter flange; the main shaft is supported on the main shaft bearing seat by the front main shaft bearing and the rear main shaft bearing; the retaining ring is connected to the main shaft and is used for axial positioning of the rear main shaft bearing; the main shaft bearing seat is connected to the low-speed gearbox through the adapter flange.

3. The integrated transmission chain structure of a wind turbine generator set according to claim 2, characterized in that: The first-stage planetary assembly includes a first-stage inner gear ring, a first-stage planetary gear, a first-stage sun gear, a spline shaft, a first-stage planetary carrier and a spline flange; the spline teeth of the first-stage inner gear ring are connected to the main shaft through a retaining ring, the first-stage planetary carrier is fixedly connected to the adapter flange and supports the first-stage planetary gear, the first-stage planetary gear is respectively engaged with the first-stage inner gear ring and the first-stage sun gear, and the first-stage sun gear is connected to the second-stage planetary assembly through a spline shaft and a spline flange.

4. The integrated transmission chain structure of a wind turbine generator set according to claim 3, characterized in that: The secondary planetary assembly includes a secondary inner ring gear, a secondary planetary gear, a secondary sun gear, an output gear shaft and a secondary planetary carrier; the secondary inner ring gear is connected to the primary sun gear, the secondary planetary carrier is connected to the main shaft by bolts and supports the secondary planetary gear, the secondary planetary gears are respectively engaged with the secondary inner ring gear and the secondary sun gear, and the secondary sun gear is connected to the output gear shaft.

5. The integrated transmission chain structure of a wind turbine generator set according to claim 4, characterized in that: The output gear shaft is connected to the input end of the high-speed gear box, and the output end of the high-speed gear box is connected to the generator of the wind turbine generator set.

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