CN211852684U - A compact semi-direct drive wind turbine gearbox power split transmission structure - Google Patents

Abstract

The utility model discloses a compact half-direct drive wind-powered electricity generation gear box power split transmission structure, including the main bearing and the hub side that adopt single biserial flange formula main bearing structure, generator side planet train, the planet carrier of these two planet wheel trains is solid as an organic whole with the main bearing inner circle, constitutes the duplex planet carrier, input power spreads into in respective planetary gear drive train from the duplex planet carrier, generator side ring gear and main bearing outer lane, gear box and generator shell are solid as an organic whole, generator side sun gear connects hub side ring gear, hub side sun gear connects the generator; the input power of a planet carrier of the generator-side planet gear train is transmitted to the hub-side inner gear ring through a planet wheel and a generator-side sun gear, the input power is synthesized with the power of the planet wheel of the hub-side planet gear train, and the power is transmitted to the generator through the hub-side sun gear. The utility model discloses be in the same place intermediate speed gear box and main shaft bearing are integrated, and the gear box adopts the differential + flexible round pin structure of two-stage power split, makes the structure compacter.

Description

A compact semi-direct drive wind turbine gearbox power split transmission structure

technical field

The utility model relates to the technical field of wind power gearbox transmission, in particular to a power split transmission structure of a compact semi-direct drive wind power gearbox.

Background technique

It is known in the industry that a long main shaft and a high-speed gearbox are mainly used in the transmission system of a traditional wind turbine. This structure is often used below the 3MW platform, but the axial dimension of the entire traditional system is very long, the radial and axial dimensions of the gearbox are also large, and the high-speed stage of the gearbox has many failures.

Utility model content

The purpose of the utility model is to overcome the deficiencies and shortcomings of the prior art, and proposes a power split transmission structure of a compact semi-direct drive wind power gearbox, aiming at the high-power compact semi-direct drive traditional system, the medium-speed gearbox and the main shaft bearing are integrated Together, the gearbox adopts a two-stage power split differential + flexible pin structure, which provides a solution for the transmission structure of the semi-direct drive wind power gearbox. At the same time, the power of the wind turbine can be applied between 2.5MW and 15MW, and the two-stage differential differential of the gearbox power can be extended to the third or fourth stage.

In order to achieve the above purpose, the technical solution provided by the present utility model is: a compact semi-direct drive wind power gearbox power split transmission structure, including a main bearing adopting a single double-row flange type main bearing structure and a two-stage planetary gear train. ; The main bearing is built in the gear box, which is used to bear the force and bending moment load transmitted by the wind wheel, and reduce the impact of the alternating load on the gear box; the two-stage planetary gear train includes a hub-side planet close to the hub side The gear train and the generator side planetary gear train close to the generator side, the planet carrier of the hub side planetary gear train and the planet carrier of the generator side planetary gear train are connected together by bolts through the inner ring of the main bearing to form a double connection. Planet carrier, the planet carrier of the hub-side planetary gear train is connected to the hub, and the input power is transmitted from the double planetary carrier to the respective planetary gear drive trains; the generator-side ring gear of the generator-side planetary gear train It is fixedly connected with the outer ring of the main bearing, the box of the gearbox and the outer casing of the generator with bolts. The generator-side sun gear of the generator-side planetary gear train and the hub-side inner ring gear of the hub-side planetary gear train Connected by a connecting plate, the hub-side sun gear of the hub-side planetary gear train is connected to the generator; the input power of the planet carrier of the generator-side planetary gear train is transmitted to the hub side through its planetary gear and the generator-side sun gear The ring gear is combined with the power of the planetary gears of the hub-side planetary gear train, and is transmitted to the hub-side sun gear, and finally the hub-side sun gear transmits the power to the generator.

Further, each planetary gear adopts a flexible pin structure for load sharing, the flexible pin structure is composed of a flexible pin shaft and a pin sleeve, the flexible pin shaft and the planet carrier are in interference fit, and the pin sleeve and the flexible pin shaft are in interference fit. The interference fit supports the planetary bearing and the planetary gear. When the two tangential forces of the ring gear and the sun gear are applied to the planetary gear, the angular deflection caused by the bending of the flexible pin on the planetary carrier can be reversed. The angular deflection caused by the bending of the pin sleeve from the other end of the flexible pin is offset, allowing each planetary wheel to float in parallel, which in turn distributes the load evenly between each planetary wheel.

Compared with the prior art, the utility model has the following advantages and beneficial effects:

1. The transmission structure does not use a long main shaft, but adopts a single double-row flange type main bearing structure, which greatly reduces the axial size of the transmission chain.

2. It adopts two-stage power split differential, medium-speed transmission. Compared with high-speed transmission, the gearbox has one less parallel shaft transmission, which reduces the axial size of the gearbox, especially suitable for high-power wind turbines.

3. The flexible pin structure is used to make the planetary gear float and load evenly, so that the load of the multi-planetary gear train is more uniform, the transmission is more stable, the service life is effectively improved, the axial size is further reduced, and the structure is more compact.

Description of drawings

FIG. 1 is a schematic diagram of the power split transmission structure of the compact semi-direct drive wind turbine gearbox of the present embodiment.

Detailed ways

The present utility model will be further described below in conjunction with specific embodiments.

Referring to FIG. 1 , the power split transmission structure of the compact semi-direct drive wind turbine gearbox provided in this embodiment includes a main bearing and a two-stage planetary gear train using a single double-row flanged main bearing structure. The main bearing is built in the gear box, which is used to bear the loads such as force and bending moment transmitted by the wind wheel, and reduce the impact of the alternating load on the gear box. The two-stage planetary gear train includes the hub-side planetary gear train close to the hub side. And the generator side planetary gear train close to the generator side, the planet carrier 5 of the hub side planetary gear train and the planet carrier 9 of the generator side planetary gear train are connected together by bolts through the inner ring 6 of the main bearing, forming a double The planetary carrier 5 of the hub-side planetary gear train is connected to the hub, and the power input by the wind turbine blades is transmitted from the double-connected planetary carrier to the respective planetary gear trains. The power generation of the generator-side planetary gear train The engine side ring gear 12 is fixedly connected with the outer ring 7 of the main bearing, the box body 11 of the gearbox and the outer casing 13 of the generator with bolts. The generator side sun gear 17 of the generator side planetary gear train is connected to the hub. The hub-side ring gear 8 of the side planetary gear train is connected with the connecting plate 10, the hub-side sun gear 1 of the hub-side planetary gear train is connected to the generator, and the planet carrier input power of the generator-side planetary gear train passes through it. The planetary gear 14 and the generator-side sun gear 17 are transmitted to the hub-side ring gear 8, combined with the power of the planetary gear 2 of the hub-side planetary gear train, and transmitted to the hub-side sun gear 1, and finally the hub-side sun gear 1 transmits the power to the generator.

In addition, the planetary gears 2 and 14 both use a flexible pin structure for load equalization. The flexible pin structure of the planetary wheel 2 is composed of a flexible pin shaft 3 and a pin sleeve 4, and the flexible pin structure of the planetary wheel 14 is composed of a flexible pin shaft. 16 and pin sleeves 15, the flexible pin shafts 3, 16 are in interference fit with their corresponding planet carriers, and the pin sleeves 4, 15 are in interference fit with their respective corresponding flexible pin shafts, and support the planetary bearings and planetary gears. When the two tangential forces of the ring gear and the sun gear are applied to the planetary gear, the angular deviance caused by the bending of the flexible pin on the planet carrier can be caused by the bending of the pin sleeve from the other end of the flexible pin in the opposite direction. The angular detours cancel out, causing each planetary wheel to float in parallel, which in turn distributes the load evenly between each planetary wheel. At the same time, the flexible pin structure further reduces the axial dimension, further making the transmission system more compact.

The above-mentioned 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 according to the shape and principle of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (2)

1. The utility model provides a compact half direct-drive wind-powered electricity generation gear box power reposition of redundant personnel transmission structure which characterized in that: the main bearing and the two-stage planetary gear train adopt a single double-row flange type main bearing structure; the main bearing is arranged in the gear box and used for bearing force and bending moment load transmitted by the wind wheel and reducing impact of alternating load on the gear box; the two-stage planetary gear train comprises a hub-side planetary gear train close to the hub side and a generator-side planetary gear train close to the generator side, a planet carrier of the hub-side planetary gear train and a planet carrier of the generator-side planetary gear train are connected into a whole through an inner ring of a main bearing by using bolts to form a duplex planet carrier, the planet carrier of the hub-side planetary gear train is connected with the hub, and input power is transmitted into respective planetary gear transmission systems from the duplex planet carrier; the generator side inner gear ring of the generator side planetary gear train is fixedly connected with the outer ring of the main bearing, the box body of the gear box and the shell of the generator through bolts, the generator side sun gear of the generator side planetary gear train is connected with the hub side inner gear ring of the hub side planetary gear train through a connecting plate, and the hub side sun gear of the hub side planetary gear train is connected with the generator; the input power of a planet carrier of the generator-side planet gear train is transmitted to the hub-side inner gear ring through a planet wheel and a generator-side sun gear, is synthesized with the power of the planet wheel of the hub-side planet gear train, is transmitted to the hub-side sun gear, and finally is transmitted to the generator through the hub-side sun gear.

2. The compact semi-direct drive wind-powered gearbox power split drive of claim 1, wherein: each planet wheel is uniformly loaded by adopting a flexible pin structure, the flexible pin structure consists of a flexible pin shaft and a pin sleeve, the flexible pin shaft is in interference fit with the planet carrier, the pin sleeve is in interference fit with the flexible pin shaft and supports the planet bearing and the planet wheel, when two tangential forces of the inner gear ring and the sun wheel are applied to the planet wheel, the angle winding degree caused by the bending of the flexible pin shaft on the planet carrier can be offset by the angle winding degree caused by the bending of the pin sleeve from the other end of the flexible pin shaft in the opposite direction, so that each planet wheel floats in parallel, and the load is uniformly distributed among the planet wheels.

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