CN106224450A - A kind of wind power yawing driving means containing Harmonic Gears - Google Patents

Abstract

The invention discloses a kind of wind power yawing driving means containing Harmonic Gears, belong to technical field of wind power generation, including first order Harmonic Gears assembly and second level planetary drive, first order Harmonic Gears assembly includes flexible gear (3), rigid gear (2), wave producer (4) and power shaft (21), wave producer (4) is fixed with power shaft (21), being fixed with flexible gear (3) on wave producer (4), flexible gear (3) engages with rigid gear (2)；Second level planetary drive includes that sun gear (17), planetary gear set (8), planet carrier (10), ring gear (9) and jackshaft (19), flexible gear (3) are fixed with jackshaft (19).This wind power yawing driving means has that volume is little, compact conformation, lightweight, stable drive, transmission accuracy high, bearing capacity is big, transmission efficiency high.

Description

A wind power yaw driving device with harmonic gear transmission

technical field

The invention belongs to the technical field of wind power generation, and in particular relates to a wind power yaw driving device with harmonic gear transmission.

Background technique

Wind power is one of the green and non-polluting new energy sources, and it has developed rapidly around the world in recent years. my country is rich in wind resources, and the installed capacity of wind power is increasing year by year and at a high speed. The yaw device of the wind turbine is installed at the bottom of the nacelle, and the motor drives the nacelle to rotate relative to the tower to maximize the windward of the impeller. The wind power yaw device directly affects the wind energy utilization rate of the wind turbine.

At present, wind power yaw devices mainly include fixed-axis cylindrical gear transmission, multi-stage planetary gear transmission, planetary gear transmission and fixed-axis cylindrical gear transmission, worm gear and planetary gear transmission, etc. However, the above-mentioned yaw device has problems such as large volume, heavy weight, difficult assembly, and high cost, which have a certain impact on the cost of wind power generation.

The improved wind power yaw device mainly includes involute planetary transmission with small tooth difference, cycloidal pinwheel planetary transmission, etc. Planetary transmission with small tooth difference has large displacement coefficient and large pressure angle, resulting in high bearing pressure and limited output torque, and it has very high requirements for the accuracy of the output mechanism; cycloidal pinwheel planetary transmission has large transmission ratio and high efficiency. However, the processing technology is complex, and the requirements for process and installation accuracy are very high.

Contents of the invention

In order to solve the above problems, the present invention provides a wind power yaw driving device with harmonic gear transmission, the wind power yaw driving device has the advantages of small size, compact structure, light weight, stable transmission, high transmission precision, large bearing capacity, Features such as high transmission efficiency.

To achieve the above object, the technical scheme of the present invention is as follows:

A wind power yaw driving device containing harmonic gear transmission, including a yaw motor, a box body and an output gear shaft 13, the box body includes a flange frame 22, an upper box body 6, a middle box body 18, and a lower box body 11 and the lower end cover 12, between the yaw motor and the flange frame 22, between the flange frame 22 and the upper box body 6, and between the upper box body 6 and the middle box body 18 are fixedly connected, and the wind power yaw drive The device also includes a first-stage harmonic gear transmission assembly and a second-stage planetary gear transmission assembly installed inside the box, wherein the first-stage harmonic gear transmission assembly includes a flexible gear 3, a rigid gear 2, a wave generator 4 and the input shaft 21, wherein the top of the input shaft 21 is connected with the output shaft of the yaw motor and supported on the flange frame 22 and the intermediate shaft 19, the wave generator 4 is connected with the input shaft 21, and the outer surface of the wave generator 4 A flexible gear 3 is installed on the circumference, and the flexible gear 3 meshes with the rigid gear 2, and the rigid gear 2 is fixedly connected with the upper case 6; the second-stage planetary gear transmission assembly includes a sun gear 17, a planetary gear set 8, a planet carrier 10, The inner ring gear 9 and the intermediate shaft 19, wherein the inner ring gear 9 is located between the middle case 18 and the lower case 11, between the middle case 18 and the inner ring gear 9 and between the inner ring gear 9 and the lower case 11 Both are fixedly connected; the sun gear 17 is connected with the intermediate shaft 19, and the top of the intermediate shaft 19 is supported on the middle box body 18; the planetary gear set 8 is evenly distributed on the outer circumference of the sun gear 17, and is connected with the sun gear 17 and the internal gear respectively. Ring 9 meshes, a plurality of planetary gears 8 are supported on the planetary carrier 10, and the planetary carrier 10 is supported on the lower box 11; the bottom of the flexible gear 3 is fixedly connected to the top of the intermediate shaft 19, and the input shaft 21 is supported on the intermediate shaft 19 Above: the planet carrier 10 is connected to the output gear shaft 13 , the output gear shaft 13 is supported on the lower box body 11 , and the bottom end of the output gear shaft 13 is fixedly connected with an external gear 23 .

The top end of the intermediate shaft 19 is supported on the middle case 18 through the intermediate shaft bearing 14 .

The planet carrier 10 is supported on the lower case 11 through the sleeve 16 and the planet carrier bearing 15 .

The input shaft 21 is supported on the intermediate shaft 19 through the input shaft bottom end bearing 5 .

The output gear shaft 13 is supported on the lower case body 11 through the output gear shaft bearing 20 and the lower end cover 12 .

The beneficial effects of the present invention are:

1) Structural innovation: The wind power yaw driving device with harmonic gear transmission of the present invention applies harmonic gears to wind power yaw devices for the first time. The overall structure is novel and unique, the gear teeth have large bearing capacity, high transmission accuracy and transmission efficiency.

2) Small size: The wind power yaw driving device with harmonic gear transmission of the present invention has a small number of parts and a short assembly cycle.

3) Large transmission ratio: The wind power yaw driving device with harmonic gear transmission of the present invention adopts a combination of harmonic gear transmission and planetary gear transmission, which is suitable for yaw deceleration of megawatt-level wind power generators.

4) The wind power yaw driving device with harmonic gear transmission of the present invention is small in size, compact in structure, light in weight and high in efficiency.

5) The wind power yaw driving device containing harmonic gear transmission of the present invention is supported by bearings, which effectively solves the vertical support problem of the internal components of the wind turbine yaw device reducer.

Description of drawings

Fig. 1 is a schematic structural diagram of a wind power yaw driving device including a harmonic gear drive according to the present invention. Explanation of reference signs

1 Input shaft top end bearing

2 rigid gears

3 flex gears

4 wave generator

5 Input shaft bottom end bearing

6 Upper box

7 planet shaft

8 planetary gear set

9 Ring gear

10 planet carrier

11 lower box

12 Lower end cap

13 Output gear shaft

14 Intermediate shaft bearing

15 Planet carrier bearing

16 sockets

17 sun wheel

18 middle box

19 intermediate shaft

20 Output gear shaft bearing

21 Input shaft

22 Flange

23 External gear

detailed description

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

As shown in Figure 1, the wind power yaw driving device containing harmonic gear transmission of the present invention includes a yaw motor (not shown in the figure), a casing, a first-stage harmonic gear transmission assembly installed inside the casing, and a second Two-stage planetary gear transmission assembly, output gear shaft 13.

The box body includes a flange frame 22, an upper box body 6, a middle box body 18, a lower box body 11 and a lower end cover 12. The yaw motor is fixedly connected with the flange frame 22 through bolts, and the flange frame 22 is connected with the upper box body. 6 are fixedly connected by screws, and the upper box body 6 and the middle box body 18 are fixedly connected by bolts.

The first-stage harmonic gear transmission assembly includes a flexible gear 3, a rigid gear 2, a wave generator 4, and an input shaft 21, wherein the top of the input shaft 21 is connected to the output shaft of the yaw motor through a key, and is passed through the top of the input shaft. The bearing 1 is supported on the flange frame 22, the wave generator 4 is connected with the input shaft 21 through a key, the outer circumference of the wave generator 4 is equipped with a flexible gear 3, the flexible gear 3 meshes with the rigid gear 2, and the rigid gear 2 is connected with the The upper box body 6 is fixedly connected.

The second-stage planetary gear transmission assembly includes a sun gear 17, a planetary gear set 8 including a plurality of planetary gears, a planet carrier 10, an inner ring gear 9 and an intermediate shaft 19, wherein the inner ring gear 9 is located in the middle case 18 and Between the lower casings 11, between the middle casing 18 and the ring gear 9, and between the ring gear 9 and the lower casing 11 are fixedly connected by bolts; the sun gear 17 is connected with the intermediate shaft 19 through a spline, and the intermediate shaft The top end of 19 is supported on the middle case 18 through the intermediate shaft bearing 14; the planetary gear set 8 is evenly distributed on the outer circumference of the sun gear 17, and meshes with the sun gear 17 and the ring gear 9 respectively, and a plurality of planetary gears 8 pass through the planetary The gear shaft 7 is supported on the planet carrier 10 , and the planet carrier 10 is supported on the lower box body 11 through the sleeve 16 and the planet carrier bearing 15 .

The bottom of the flexible gear 3 is fixedly connected to the top end of the intermediate shaft 19 through bolts, and the input shaft 21 is supported on the intermediate shaft 19 through the bearing 5 at the bottom end of the input shaft.

The planet carrier 10 is connected to the output gear shaft 13 through a spline, the output gear shaft 13 is supported on the lower box body 11 through the output gear shaft bearing 20 and the lower end cover 12, and the bottom end of the output gear shaft 13 is fixedly connected with an external gear 23, The output gear shaft 13 and the external gear 23 are integral structures.

The wind power yaw driving device with harmonic gear transmission of the present invention is divided into two-stage transmissions: the first-stage harmonic gear transmission and the second-stage planetary gear transmission. The power source is provided by the yaw motor. The working process is as follows:

The output shaft of the yaw motor transmits power to the first-stage harmonic gear transmission assembly through the input shaft 21, and the input shaft 21 drives the wave generator 4 to generate moving deformation waves. The flexible gear 3 of the first-stage harmonic gear transmission assembly serves as the first The output member of the first-stage harmonic gear transmission transmits power to the intermediate shaft 19 of the second-stage planetary gear transmission assembly through bolts.

The intermediate shaft 19 transmits the power to the sun gear 17 through the spline, and further drives the rotation of the planetary gear set 8, and the planetary gear set 8 drives the rotation of the planetary carrier 10, and the planetary carrier 10 is used as the output part of the second-stage planetary gear transmission to rotate through the spline. The power is transmitted to the output gear shaft 13 and further drives the external gear 23 to rotate, and the external gear 23 meshes with the large internal gear located at the bottom of the nacelle to complete the yaw action.

Claims (5)

1. containing the wind power yawing driving means of Harmonic Gears, including yaw motor and casing and output gear shaft (13), described casing includes flange frame (22), upper box (6), middle casing (18), lower box (11) and bottom end cover (12), driftage Between motor and flange frame (22), between flange frame (22) and upper box (6), the most solid between upper box (6) and middle casing (18) Fixed connection, it is characterised in that:

Described wind power yawing driving means also includes first order Harmonic Gears assembly and the second level being installed on box house Planetary drive, wherein,

Described first order Harmonic Gears assembly includes flexible gear (3), rigid gear (2), wave producer (4) and power shaft (21), wherein, the top of power shaft (21) is connected with yaw motor output shaft, and is supported on flange frame (22) and jackshaft (19) On, wave producer (4) is connected with power shaft (21), equipped with flexible gear (3), flexible gear on the excircle of wave producer (4) (3) engaging with rigid gear (2), rigid gear (2) is fixing with upper box (6) to be connected；

Described second level planetary drive includes sun gear (17), planetary gear set (8), planet carrier (10), ring gear (9) With jackshaft (19), wherein, ring gear (9) is positioned between middle casing (18) and lower box (11), middle casing (18) and ring gear (9) it is fixedly connected with between and between ring gear (9) and lower box (11)；Sun gear (17) is connected with jackshaft (19), in The apical support of countershaft (19) is on middle casing (18)；Planetary gear set (8) is evenly distributed on the excircle of sun gear (17), and Engaging with sun gear (17) and ring gear (9) respectively, multiple planetary gears (8) are supported on planet carrier (10), planet carrier (10) It is supported on lower box (11)；

The bottom of described flexible gear (3) is fixing with the top of jackshaft (19) to be connected, and power shaft (21) is supported on jackshaft (19) on；

Described planet carrier (10) is connected with output gear shaft (13), and output gear shaft (13) is supported on lower box (11), output The bottom of gear shaft (13) is fixedly connected with external gear (23).

It is the most according to claim 1, it is characterised in that:

The top of described jackshaft (19) is supported on middle casing (18) by midship shaft bearing (14).

It is the most according to claim 1, it is characterised in that:

Described planet carrier (10) is supported on lower box (11) by sleeve (16) and planet carrier bearing (15).

It is the most according to claim 1, it is characterised in that:

Described power shaft (21) is supported on jackshaft (19) by power shaft bottom bearing (5).

It is the most according to claim 1, it is characterised in that:

Described output gear shaft (13) is supported on lower box (11) by output gear axle bearing (20) and bottom end cover (12).