CN203670627U - Step-up gear box and wind generating set - Google Patents

Abstract

The utility model relates to the technical field of gear boxes, and discloses a step-up gear box and a wind generating set to improve the transmission ratio, bear a large load and reduce the radial size. The step-up gear box comprises a box body, a first planetary gear train, a second planetary gear train, a transmission gear and an output shaft. The output shaft is provided with an output gear, the first planetary gear train is an NGW type planetary gear train, and the second planetary gear train is an NW type planetary gear train. The step-up gear box is used in the wind generating set.

Description

A speed-increasing gearbox and a wind power generating set

technical field

The utility model relates to the technical field of gear boxes, in particular to a speed-increasing gear box and a wind power generating set.

Background technique

The speed-increasing gearbox is widely used. It is an important mechanical component in the wind turbine. Usually, the impeller speed of the wind turbine is very low, which cannot reach the speed required by the generator for power generation. It must be accelerated by the speed-increasing gearbox. To achieve this, as the transmission system of the wind power generating set plays the role of power transmission, the speed of the blade is increased through the speed-increasing gearbox to make its speed reach the rated speed of the generator, so that the generator can generate electricity normally, so the speed-up gearbox Design and manufacturing are critical.

Due to the limitation of its use conditions, the speed-up gearbox of wind power generating set requires small size, light weight, excellent performance, reliable operation and low failure rate. The existing speed-up gearboxes widely use two-stage NGW (N-internal meshing, G- Common planetary gear, W-external meshing) type planetary gear train with transmission, NGW planetary gear train includes a rotatable planet carrier and a fixed ring gear, the planet carrier is equipped with a planetary shaft and a sun gear, and a planetary gear shaft is installed with Planetary gear, the planetary gear meshes with the inner ring gear and the sun gear respectively, and the planetary gear rotates in the inner ring gear and drives the sun gear to rotate. Due to the support of the planetary gear, the NGW planetary gear system can bear a large load, but the inner meshing transmission does not It is beneficial to improve the transmission ratio, so the cooperation of the two-stage NGW planetary gear train is difficult to ensure a high transmission ratio while bearing a large load, and the radial dimension of the NGW planetary gear train is large, which is not conducive to simplifying the structure and reducing the occupation space.

Utility model content

The embodiment of the utility model provides a speed-increasing gear box for a generator and a wind power generating set, which can increase the transmission ratio and reduce the radial size while bearing a relatively large load.

In order to achieve the above object, the embodiments of the present utility model adopt the following technical solutions:

A speed-increasing gear box, including a box body, a first planetary gear train, a second planetary gear train, a transmission gear and an output shaft, the output shaft is provided with an output gear, and it is characterized in that the first planetary gear train It is an NGW planetary gear train, and the second planetary gear train is an NW (N-inner gear, W-outer gear) planetary gear train.

Further, the first planetary gear train includes: a first planetary carrier, the first planetary carrier is connected to the box through a bearing; a first ring gear, the first ring gear is arranged on the box On the body; the first planetary gear shaft, the first planetary gear shaft is fixedly connected with the first planet carrier, and the first planetary gear shaft is provided with the first planetary gear; the first sun gear, the first sun gear is connected with the first planetary gear The first planetary gear meshes; the second planetary gear train includes: a second planetary carrier, the second planetary carrier is in drive connection with the first sun gear, and the second planetary carrier is provided with a second inner ring gear; second planetary gear shaft, the second planetary gear shaft is connected with the box through a bearing, one end of the second planetary gear shaft is provided with a second planetary gear, and the other end is provided with a third planetary gear, and the second planetary gear shaft is provided with a third planetary gear. The second planetary gear meshes with the second ring gear; the second sun gear, one end of the second sun gear meshes with the third planetary gear, and the other end is in transmission connection with the transmission gear, and the transmission gear is connected with the transmission gear. The output gear meshes.

Further, the box body includes a front box body, a support frame, a middle box body and a rear box body connected in sequence, one end of the front box body is connected to the first planetary carrier through a bearing, and the support frame is respectively connected through a bearing. The first planet carrier is connected with the second planet carrier, and one end of the rear case is connected with the output shaft through a bearing.

Further, it also includes a tube shaft, one end of the tube shaft is connected to the first planet carrier through a bearing, and the other end is connected to the rear box through a bearing, and the tube shaft passes through the first planet carrier, The first sun gear, the second planet carrier and the second sun gear are set.

Furthermore, an oil seal is provided at the connection between the tube shaft and the first planet carrier, and an oil seal is provided at the connection between the tube shaft and the rear box.

Preferably, there are three first planetary gears and the first planetary gear shafts, and each of the first planetary gear shafts is provided with one of the first planetary gears, the second planetary gears, the There are three third planetary wheels and the second planetary wheel shafts, and one second planetary wheel and one third planetary wheel are provided on each second planetary wheel shaft.

Further, the first sun gear is splined to the second planet carrier, and the second sun gear is splined to the transmission gear.

Furthermore, the top of the axial section of the spline is an upward convex arc.

Preferably, the second planetary shaft is integrally formed with the second planetary gear.

The speed-increasing gear box provided by the embodiment of the utility model adopts NGW type planetary gear system and NW type planetary gear system to cooperate to drive, transmits through the transmission gear, and outputs from the output shaft, because the sun gear in the NGW type planetary gear system is located In the center of the center, the planetary gear meshes with the sun gear and the ring gear respectively, so the NGW planetary gear system can bear a large load and transmit a large torque. In the NW type planetary gear system, there are two transmissions between the ring gear and the sun gear. Therefore, the transmission ratio can be increased twice, and since there is no sun gear inside the ring gear, the radial size of the ring gear can be reduced, thereby reducing the radial size of the planetary gear train and the speed-up gearbox, and lubrication The pipeline can also be shortened due to the reduction of the radial dimension of the speed-increasing gearbox, thereby improving the lubrication conditions. At the same time, due to the compact structure of the planetary gear train, the noise generated during the transmission process can be reduced. Therefore, the use of NGW The combination of NW-type planetary gear train and NW-type planetary gear train can increase the transmission ratio and reduce the radial size while bearing a large load.

The utility model also provides a wind power generating set, including the speed-increasing gearbox described in any one of the above technical solutions.

The wind power generating set provided by the embodiment of the utility model adopts NGW type planetary gear train and NW type planetary gear train to coordinate transmission in the speed-increasing gearbox, transmits through the transmission gear, and outputs from the output shaft. The sun gear is located at the center of the ring gear, and the planet gears mesh with the sun gear and the ring gear respectively, so they can bear a large load, so that the NGW planetary gear system can transmit a large torque, and the ring gear and the NW planetary gear system There are two transmissions between the sun gears, so the transmission ratio can be increased twice, and because there is no sun gear inside the inner ring gear, the radial dimension of the inner ring gear can be reduced, thereby reducing the radial diameter of the planetary gear train. size, thereby reducing the radial dimension of the speed-up gearbox. Therefore, the combination of the NGW-type planetary gear train and the NW-type planetary gear train can increase the transmission ratio while bearing a large load, and reduce the radial size, improving the performance of wind turbines.

Description of drawings

Fig. 1 is a structural schematic diagram of a speed-up gearbox according to an embodiment of the present utility model.

Detailed ways

A speed-increasing gearbox and a wind power generating set according to an embodiment of the present utility model will be described in detail below in conjunction with the accompanying drawings.

In describing the present invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal" , "top", "bottom", "inner", "outer" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating Or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more.

Referring to Fig. 1, the speed-increasing gear box described in the embodiment of the utility model includes a casing, a first planetary gear train 1, a second planetary gear train 2, a transmission gear 7 and an output shaft 8, and the output shaft 8 is provided with an output Gear 9, the first planetary gear train 1 is an NGW type planetary gear train, and the second planetary gear train 2 is an NW type planetary gear train.

The speed-increasing gear box provided by the embodiment of the utility model adopts NGW type planetary gear system and NW type planetary gear system for cooperating transmission, is transmitted through the transmission gear, and is output by the output shaft 8, because the sun gear in the NGW type planetary gear system is located in the inner gear In the center of the circle, the planetary gear meshes with the sun gear and the ring gear respectively, so the NGW planetary gear system can bear a large load and transmit a large torque. In the NW type planetary gear system, there are two transmissions between the ring gear and the sun gear. , so the transmission ratio can be increased twice, and since there is no sun gear inside the ring gear, the radial size of the ring gear can be reduced, thereby reducing the radial size of the planetary gear train and the speed-up gearbox, The lubricating pipeline can also be shortened due to the reduction of the radial size of the speed-increasing gearbox, thereby improving the lubrication conditions. At the same time, due to the compact structure of the planetary gear train, the noise generated during the transmission process can be reduced. Therefore, the use of The combination of NGW planetary gear train and NW planetary gear train can increase the transmission ratio while bearing a large load, reduce the radial dimension, reduce noise, simplify the lubrication pipeline, improve the lubrication condition, and can The speed-increasing gearbox is divided into different modules by the two planetary gear trains, and each module can be designed and manufactured individually or simultaneously, thereby facilitating the modular design and manufacture of the speed-increasing gearbox.

Specifically, the first planetary gear train 1 may have a structure as shown in FIG. 1 , including: a first planet carrier 101, which is connected to the casing through a bearing; a first inner ring gear 102, a first inner tooth The ring 102 is arranged on the box body; the first planetary shaft 103, the first planetary shaft 103 is fixedly connected with the first planet carrier 101, and the first planetary shaft 103 is provided with the first planetary gear 104; and the first sun gear 105, the first A sun gear 105 meshes with the first planetary gear 104;

The second planetary gear train 2 may have the following structure, including: a second planetary carrier 201, which is in transmission connection with the first sun gear 105, and the second planetary carrier 201 is provided with a second ring gear 202; Planetary wheel shaft 203, the second planetary wheel shaft 203 is connected with the casing through bearings, one end of the second planetary wheel shaft 203 is provided with the second planetary wheel 204, and the other end is provided with the third planetary wheel 205, the second planetary wheel 204 and the second inner The ring gear 202 is engaged; and the second sun gear 206 , one end of the second sun gear 206 is engaged with the third planetary gear 205 , and the other end is in transmission connection with the transmission gear 7 , and the transmission gear 7 is engaged with the output gear 9 .

Since the first sun gear 105 in the first planetary gear system 1 is located at the center of the first ring gear 102, the first planetary gears 104 mesh with the first sun gear 105 and the first ring gear 102 respectively, so the first planetary gear system 1 can bear a large load and transmit a large torque. In the second planetary gear train 2, there are two gear transmissions between the second inner ring gear 202 and the second sun gear 206, so that the transmission ratio can be increased twice, and because the second The second sun gear 206 is outside the second ring gear 202, therefore, the radial size of the second ring gear 202 can be reduced, thereby reducing the radial size of the second planetary gear train 2 and the speed-up gearbox, and lubricating The pipeline can also be shortened due to the reduction of the radial size of the speed-up gearbox, thereby improving the lubrication conditions. At the same time, due to the compact structure of the first planetary gear 1 and the second planetary gear 2, the transmission process can be reduced Therefore, the transmission ratio can be increased, the radial size can be reduced, the noise can be reduced, the lubrication pipeline can be simplified, and the lubrication conditions can be improved while bearing a large load.

In order to make disassembly and assembly of the speed-increasing gear box more convenient, the box body can be composed of the front box body 3, the support frame 4, the middle box body 5 and the rear box body 6 connected in sequence, so that the speed-increasing gear box can be installed in order and disassembly, it is not necessary to open all the boxes when repairing or adjusting some parts, so that the operation is simple and convenient, and one end of the front box 3 can be connected with the first planetary carrier 101 through bearings, thus, the first planetary carrier 101 can be Provide support without affecting the rotation of the first planet carrier 101, so that the support frame 4 can be connected with the first planet carrier 101 and the second planet carrier 201 respectively through bearings, thus, the first planet carrier 101 and the second planet carrier can be Frames 201 provide support respectively, so that the transmission between the first planetary carrier 101 and the second planetary carrier 201 is more reliable, and one end of the rear box body 6 can be connected with the output shaft 8 through a bearing, thereby providing support for the output shaft 8, And the rotation of the output shaft 8 is not affected.

In order to facilitate the line connection of the wind power generating set, the speed-up gearbox may also include a tube shaft 10 with a hollow structure inside. The lines of the wind power generating set can be laid through the hollow structure of the tube shaft 10, so that the lines of the wind power generating set can pass through the speed increasing gear box without affecting the internal operation of the speed increasing gear box, so that it is convenient for each part of the wind power generating set Electrical connections between components. One end of the tube shaft 10 is connected with the first planet carrier 101 through a bearing, and the other end is connected with the rear case 6 through a bearing. It can provide support for the first planetary carrier 101 and the rear case body 6, and does not affect the internal operation of the speed-up gearbox. The tube shaft 10 passes through the first planet carrier 101 , the first sun gear 105 , the second planet carrier 201 and the second sun gear 206 in sequence. This facilitates the positioning and installation of the first planet carrier 101 , the first sun gear 105 , the second planet carrier 201 and the second sun gear 206 .

In order to avoid lubricating oil leakage, an oil seal may be provided at the connection between the tube shaft 10 and the first planet carrier 101 , and an oil seal may be provided at the connection between the tube shaft 10 and the rear case 6 . The oil seal is provided to prevent the leakage of the lubricating oil, thus, the leakage of the lubricating oil in the speed-increasing gearbox can be avoided.

In the speed-up gearbox of the embodiment of the present utility model, there are at least one first planetary wheel 104, the first planetary wheel shaft 103, the second planetary wheel 204, the third planetary wheel 205 and the second planetary wheel shaft 203, preferably the first planetary wheel 104, the first planetary wheel shaft 103, the second planetary wheel 204, the third planetary wheel 205 and the second planetary wheel shaft 203 are three, and each first planetary wheel shaft 103 is provided with a first planetary wheel 104, each A second planetary wheel 204 and a third planetary wheel 205 are arranged on the second planetary wheel shaft 203 . When setting, the first planetary gear shaft 103 sleeved with the first planetary gear 104 can be evenly distributed along the inner wall of the first ring gear 102, which can provide stable support for the first planetary gear train 1 and share the load, so that The transmission of the first planetary gear train 1 is more stable. The second planetary gear shaft 203 sleeved with the second planetary gear 204 and the third planetary gear 205 is evenly distributed along the inner wall of the second ring gear 202 . A stable support can be provided for the second planetary gear train 2, so that the transmission of the second planetary gear train 2 is more stable.

In order to transmit larger torque, the first sun gear 105 can be splined to the second planet carrier 201 , and the second sun gear 206 can be splined to the transmission gear 7 . The speed-up gearbox bears a large load, so the torque is also large, and the number of spline teeth is large, which can transmit a large torque, so that the transmission between the first sun gear 105 and the second planet carrier 201 can be relatively large. The torque can also make the transmission between the second sun gear 206 and the transmission gear 7 larger torque, so that the operation of the speed-up gearbox is more reliable.

In order to facilitate the installation of the spline, the top of the axial section of the spline can be processed into an upward convex arc. Since there is a certain error in the installation of parts connected by splines, such as inclination, the convex arc on the top of the axial section of the spline can ensure that the two parts can still be connected and transmitted, thereby improving the spline. The ability of the key to adapt to the connected object makes it possible to ensure the installation and transmission of the connection when there is a certain error between the parts connected by the spline.

Preferably, the second planetary wheel shaft 203 and the second planetary wheel 204 can be manufactured integrally. In order to reduce the radial size of the second planetary gear train 2, the second planetary gear 204 can be set as a gear with a smaller diameter, but the pinion gear is difficult to process and difficult to install, so the second planetary gear shaft 203 and the second planetary gear shaft 203 can be combined The two planetary gears 204 are integrally processed into a gear shaft, thereby reducing the machining difficulty while reducing the radial dimension of the second planetary gear train 2 .

The working process of the speed-increasing gearbox provided by the embodiment of the utility model is as follows: the kinetic energy formed by the wind is input through the first planet carrier 101, so that the first planetary gear 103 rotates around the first inner ring gear 102, because the first planetary gear 103 simultaneously It meshes with the first-stage ring gear 102 and the first sun gear 105, the first planetary gear 103 drives the first sun gear 105 to rotate, and the first sun gear 105 drives the second planetary carrier 201 to rotate, because the second ring gear 202 is set on the second planet carrier 201, so the second ring gear 202 drives the second planetary gear 204 to rotate around the second planetary gear shaft 203, because the second planetary gear 204 and the third planetary gear 205 are respectively arranged on the second planetary gear shaft 203 , so the second planetary gear 204 can drive the third planetary gear 205 to rotate through the second planetary gear shaft 203, and the third planetary gear 205 can cause the second sun gear 206 to rotate and drive the transmission gear 7 to rotate, thereby driving the output gear 8 to rotate, and finally The generator is driven by the output shaft 9 to generate electricity.

The utility model also provides a wind power generating set, including the speed-increasing gearbox described in any one of the above technical solutions. Since the speed-up gearbox used in the wind power generating set of this embodiment is the same as the speed-up gearbox provided in each embodiment of the above-mentioned speed-up gearbox, the two can solve the same technical problem and achieve the same expectation Effect.

Other configurations of the wind power generating set in the embodiment of the utility model are well known to those skilled in the art, and will not be described in detail here.

In the description of this specification, specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in an appropriate manner.

The above is only a specific embodiment of the present utility model, but the scope of protection of the present utility model is not limited thereto. Anyone familiar with the technical field can easily think of changes or changes within the technical scope disclosed by the utility model Replacement should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.

Claims (10)

1. a step-up gear, comprise casing, the first row star wheel series, the second planetary gear train, driving gear and output shaft, described output shaft is provided with output gear, it is characterized in that, described the first row star-wheel is NGW type planetary gear train, and described the second planetary gear train is NW type planetary gear train.

2. step-up gear according to claim 1, is characterized in that,

Described the first row star wheel series comprises:

The first planet carrier, described the first planet carrier is connected by bearing with described casing;

The first ring gear, described the first ring gear is located on described casing;

The first row spider gear shaft, described the first row spider gear shaft is fixedly connected with described the first planet carrier, and described the first row spider gear shaft is provided with the first row star-wheel;

The first sun gear, described the first sun gear engages with described the first row star-wheel;

Described the second planetary gear train comprises:

The second planet carrier, described the second planet carrier and described the first sun gear are in transmission connection, and described the second planet carrier is provided with the second ring gear;

The second planet wheel shaft, described the second planet wheel shaft is connected by bearing with described casing, and one end of described the second planet wheel shaft is provided with the second planet wheel, and the other end is provided with the third line star-wheel, and described the second planet wheel engages with described the second ring gear;

The second sun gear, engage with described the third line star-wheel one end of described the second sun gear, and the other end and described driving gear are in transmission connection, and described driving gear engages with described output gear.

3. step-up gear according to claim 2, it is characterized in that, described casing comprises the front casing, supporting frame, middle casing and the rear box that connect successively, described front casing one end is connected by bearing with described the first planet carrier, support frame as described above is connected by bearing with described the second planet carrier with described the first planet carrier respectively, and one end of described rear box is connected by bearing with described output shaft.

4. according to the step-up gear described in any one in claim 1～3, it is characterized in that, also comprise tubular axis, described tubular axis one end is connected with described the first planet carrier by bearing, the other end is connected with rear box by bearing, and described tubular axis is successively through described the first planet carrier, the first sun gear, the second planet carrier and the second sun gear setting.

5. step-up gear according to claim 4, is characterized in that, is provided with oil sealing in the joint of described tubular axis and described the first planet carrier, and the joint of described tubular axis and described rear box is provided with oil sealing.

6. step-up gear according to claim 2, it is characterized in that, described the first row star-wheel and described the first row spider gear shaft are three, and each described the first row spider gear shaft is provided with a described the first row star-wheel, described the second planet wheel, described the third line star-wheel and described the second planet wheel shaft are three, and each described the second planet wheel shaft is provided with described second planet wheel and described the third line star-wheel.

7. step-up gear according to claim 2, is characterized in that, described the first sun gear and described the second planet carrier are by spline joint, and described the second sun gear and described driving gear pass through spline joint.

8. step-up gear according to claim 7, is characterized in that, the arc that the top of the axial cross section of described spline is epirelief.

9. step-up gear according to claim 2, is characterized in that, described the second planet wheel shaft and described the second planet wheel are formed in one.

10. a wind power generating set, is characterized in that, comprises the step-up gear as described in any one in claim 1～9.

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