CN215444981U - Primary planetary gear box of wind driven generator - Google Patents

Abstract

The utility model discloses a primary planetary gear box of a wind driven generator, which comprises: a ring-shaped inner gear ring which is open at both ends to form two openings; the disc-shaped chassis is fixedly connected to one end of the inner gear ring to close one of the openings so as to form a transmission space defined by the chassis and the inner gear ring; the disc-shaped planet carrier is arranged in the transmission space and is coaxially and rotatably connected with the chassis; the planetary gear train comprises at least three planetary gears circumferentially arranged in the transmission space, and each planetary gear is in rotary connection with the planetary carrier; and the sun gear is arranged in the transmission space and is positioned in the center of the planetary gear train. According to the utility model, the overall size is relatively small, and installation or maintenance in the limited installation space of the wind driven generator is convenient.

Description

Primary planetary gear box of wind driven generator

Technical Field

The utility model relates to the field of wind driven generators, in particular to a primary planetary gear box of a wind driven generator.

Background

In the field of wind generators, it is known to use planetary gearboxes of different configurations to achieve power transmission. During the research and implementation of the power transmission, researchers found that the planetary gearboxes in the prior art have at least the following problems:

the structure is complicated, the number of related parts is large, the size is large, the assembly is complicated, and the defects are particularly obvious in the limited installation space of the wind driven generator.

In view of the above, it is necessary to develop a primary planetary gearbox of a wind turbine to solve the above problems.

SUMMERY OF THE UTILITY MODEL

In order to overcome the problems of the planetary gearbox, the utility model provides a one-stage planetary gearbox of a wind driven generator, which has compact structure and fewer parts, has relatively small overall volume and is convenient to install or maintain in the limited installation space of the wind driven generator.

In terms of the planetary gear box, the primary planetary gear box of the wind power generator of the present invention for solving the above technical problems includes:

a ring-shaped inner gear ring which is open at both ends to form two openings;

the disc-shaped chassis is fixedly connected to one end of the inner gear ring to close one of the openings so as to form a transmission space defined by the chassis and the inner gear ring;

the disc-shaped planet carrier is arranged in the transmission space and is coaxially and rotatably connected with the chassis;

the planetary gear train comprises at least three planetary gears circumferentially arranged in the transmission space, and each planetary gear is in rotary connection with the planetary carrier; and

the sun gear is arranged in the transmission space and is positioned at the center of the planetary gear train;

each planet wheel is respectively and constantly meshed with the inner gear ring and the sun gear, and a first output shaft is formed at one end of the planet carrier and extends towards the direction close to the chassis until penetrating through the chassis and being exposed outside the chassis.

Optionally, the first output shaft is located at the center of the planet carrier.

In practice, it is found that the planet wheel easily generates axial force in the power transmission process, which is better when helical gear transmission or gear installation is adopted and axial deviation occurs, the axial force of the planet wheel easily pulls the planet carrier to generate axial float, so that the problems of unstable torque transmission and extra noise are caused, and in order to solve the problem, the primary planetary gear box of the wind driven generator is further improved: the outer end of the first output shaft is connected with a transmission connecting end, the radius of the transmission connecting end is larger than that of the first output shaft, so that a clamping groove surrounding the first output shaft is formed between the transmission end and the planet carrier, and the chassis is clamped in the clamping groove.

Optionally, a bearing is rotatably sleeved on the first output shaft, and the chassis is coupled to the bearing.

In practice, it has been found that wind power generators sometimes require a gearbox capable of producing a bidirectional power output, thereby further improving the one-stage planetary gearbox of the wind power generator: the other end of the planet carrier is provided with a second output shaft, the second output shaft extends towards the direction far away from the chassis until the second output shaft is exposed out of the transmission space, and the sun wheel is rotatably sleeved on the second output shaft.

Optionally, a sealing cover is rotatably sleeved on the second output shaft to seal the other opening.

Optionally, the outer end of the sun gear extends outwards and penetrates through the sealing cover to be exposed to form a power input end.

Optionally, there are 4 planet wheels.

One of the above technical solutions has the following advantages or beneficial effects: due to the relatively small overall size, installation or maintenance in the limited installation space of the wind turbine is facilitated.

Another technical scheme in the above technical scheme has the following advantages or beneficial effects: because the radius of transmission link end is greater than the radius of first output shaft so that transmission end with be formed with between the planet carrier around in the centre gripping recess of first output shaft, thereby will the chassis presss from both sides and locates in the centre gripping recess, thereby can prevent that the planet carrier from taking place axial float, improved torque transmission stability, reduced the noise.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings of the embodiments will be briefly described below, and it is apparent that the drawings in the following description relate only to some embodiments of the present invention and are not limiting thereof, wherein:

fig. 1 is an axial sectional view of a one-stage planetary gearbox of a wind power generator according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In the drawings, the shape and size may be exaggerated for clarity, and the same reference numerals will be used throughout the drawings to designate the same or similar components.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and claims of the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a," "an," or "the" and similar referents do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprise" or "comprises", and the like, means that the element or item listed before "comprises" or "comprising" covers the element or item listed after "comprising" or "comprises" and its equivalents, and does not exclude other elements or items. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

In the following description, terms such as center, thickness, height, length, front, back, rear, left, right, top, bottom, upper, lower, etc., are defined with respect to the configurations shown in the respective drawings, and in particular, "height" corresponds to a dimension from top to bottom, "width" corresponds to a dimension from left to right, "depth" corresponds to a dimension from front to rear, which are relative concepts, and thus may be varied accordingly depending on the position in which it is used, and thus these or other orientations should not be construed as limiting terms.

Terms concerning attachments, coupling and the like (e.g., "connected" and "attached") refer to a relationship wherein structures are secured or attached, either directly or indirectly, to one another through intervening structures, as well as both movable or rigid attachments or relationships, unless expressly described otherwise.

According to an embodiment of the utility model, illustrated in connection with fig. 1, it can be seen that the primary planetary gearbox 1 of a wind generator comprises:

a ring-shaped inner gear ring 13 which is open at both ends to form two openings;

a disc-shaped chassis 11 fixedly connected to one end of the inner gear ring 13 to close one of the openings to form a transmission space defined by the chassis 11 and the inner gear ring 13;

a disc-shaped planet carrier 12 which is arranged in the transmission space and is coaxially and rotatably connected with the chassis 11;

a planetary gear train comprising at least three planet gears 14 circumferentially arranged in the transmission space, each planet gear 14 being in rotational connection with the planet carrier 12; and

a sun gear 16 provided in the transmission space and located at the center of the planetary gear train;

wherein each planet wheel 14 is in constant mesh with the inner gear ring 13 and the sun wheel 16, and a first output shaft 122 is formed at one end of the planet carrier 12, and the first output shaft 122 extends towards the direction close to the chassis 11 until penetrating through the chassis 11 and being exposed outside the chassis 11.

In a preferred embodiment, the first output shaft 122 is located in the center of the planet carrier 12.

Referring to fig. 1 again, a transmission connecting end 124 is connected to an outer end of the first output shaft 122, and a radius of the transmission connecting end 124 is larger than a radius of the first output shaft 122 so that a clamping groove 123 surrounding the first output shaft 122 is formed between the transmission connecting end 124 and the planet carrier 12, so that the chassis 11 is clamped in the clamping groove 123. Therefore, the chassis is clamped in the clamping groove, so that the planet carrier can be prevented from axially moving, the torque transmission stability is improved, and the noise is reduced.

Further, a bearing 1221 is rotatably sleeved on the first output shaft 122, and the chassis 11 is coupled to the bearing 1221.

Further, a second output shaft 121 is formed at the other end of the planet carrier 12, the second output shaft 121 extends towards a direction away from the chassis 11 until being exposed from the transmission space, and the sun gear 16 is rotatably sleeved on the second output shaft 121. Thereby satisfying the bidirectional power output requirement of the wind driven generator.

Further, a cover 15 is rotatably sleeved on the second output shaft 121 to close the other opening.

Further, the outer end of the sun gear 16 extends outward and is exposed through the cover 15 to form a power input 161.

In a preferred embodiment, there are 4 planet wheels 14.

The number of apparatuses and the scale of the process described herein are intended to simplify the description of the present invention. Applications, modifications and variations of the present invention will be apparent to those skilled in the art.

The features of the different implementations described herein may be combined to form other embodiments not specifically set forth above. The components may be omitted from the structures described herein without adversely affecting their operation. Further, various individual components may be combined into one or more individual components to perform the functions described herein.

Furthermore, while embodiments of the utility model have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in a variety of fields of endeavor to which the utility model pertains, and further modifications may readily be made by those skilled in the art, it being understood that the utility model is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.

Claims (8)

1. A primary planetary gearbox for a wind turbine, comprising:

a ring-shaped inner gear ring (13) which is open at both ends to form two openings;

a disc-shaped chassis (11) fixedly connected to one end of the inner gear ring (13) to close one of the openings to form a transmission space defined by the chassis (11) and the inner gear ring (13);

a disc-shaped planet carrier (12) which is arranged in the transmission space and is coaxially and rotatably connected with the chassis (11);

a planetary gear train comprising at least three planet gears (14) circumferentially arranged in the transmission space, each planet gear (14) being in rotational connection with the planet carrier (12); and

a sun gear (16) provided in the transmission space and located at the center of the planetary gear train;

wherein each planet wheel (14) is respectively and constantly meshed with the inner gear ring (13) and the sun wheel (16), one end of the planet carrier (12) is provided with a first output shaft (122), and the first output shaft (122) extends towards the direction close to the chassis (11) until penetrating through the chassis (11) and being exposed outside the chassis (11).

2. The primary planetary gearbox of a wind turbine according to claim 1, characterized in that said first output shaft (122) is located in the center of said planet carrier (12).

3. The primary planetary gearbox of wind driven generator according to claim 2, characterized in that the outer end of the first output shaft (122) is connected with a transmission connection end (124), the radius of the transmission connection end (124) is larger than that of the first output shaft (122) so that a clamping groove (123) surrounding the first output shaft (122) is formed between the transmission connection end (124) and the planet carrier (12), thereby clamping the chassis (11) in the clamping groove (123).

4. The primary planetary gearbox of a wind turbine according to claim 3, wherein the first output shaft (122) is rotatably sleeved with a bearing (1221), and the chassis (11) is coupled to the bearing (1221).

5. The primary planetary gearbox of wind power generator as recited in claim 1, wherein said planet carrier (12) is formed at the other end with a second output shaft (121), said second output shaft (121) extends in a direction away from said chassis (11) until it emerges from said transmission space, and said sun gear (16) is rotatably sleeved on said second output shaft (121).

6. The primary planetary gearbox of wind turbine generator according to claim 5, wherein a cover (15) is rotatably sleeved on said second output shaft (121) to close another of said openings.

7. The primary planetary gearbox of a wind turbine according to claim 6, wherein the outer end of the sun gear (16) extends outward and is exposed through the cover (15) to form a power input end (161).

8. A primary planetary gearbox for wind power plants according to claim 1, characterised in that there are 4 planetary wheels (14).

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