Novel transmission structure of yaw variable pitch system of fan

Abstract

The utility model relates to the technical field of system transmission structures, and discloses a novel fan yaw variable pitch system transmission structure which comprises a motor, one side of the motor is fixedly connected with a small gear, the outer surface of the small gear is connected with a large gear in a meshed mode, one side of the large gear is provided with a first sun gear, and the other side of the large gear is provided with a second sun gear. The outer surface of the first sun gear is in meshed connection with a duplex planetary gear, the other end of the outer surface of the duplex planetary gear is in meshed connection with a first gear ring, the duplex planetary gear is movably connected with a first planet carrier, and one side of the first planet carrier is fixedly connected with a second sun gear. Compared with a transmission scheme that a four-stage NGW planetary gear train is connected in series, the four-stage NGW planetary gear train transmission device is simpler in structure, fewer in number of parts such as gears and bearings, lighter in weight and more suitable for large-scale popularization and application, the number of parts such as the gears and the bearings is smaller, and the service life of the four-stage NGW planetary gear train transmission device is prolonged. And the manufacturing and assembling cost is lower.

Description

TECHNICAL FIELD

[0001] The utility model relates to system transmission structure technical field more particularly to a novel fan yaw variable pitch system transmission structure. BACKGROUND

[0002] The yaw variable pitch driving device is the most important component of the yaw variable pitch system of the wind turbine generator (referred to as fan), which is mainly composed of motor or hydraulic motor, speed reducer and gear backlash adjusting mechanism. The power is input by the motor or hydraulic motor, and the speed is reduced and the moment is increased by the speed reducer to drive the wind wheel. Due to the low yaw speed, the speed ratio of the yaw speed reducer is large (up to 1600 or even higher), so a multi-stage planetary reducer or a reducer with worm and planetary gears in series is generally selected, among which, the four-stage NGW planetary gear train series transmission scheme is widely used. The NGW planetary gear train is a simple gear train, mainly composed of sun gear, planetary gear, ring gear and planet carrier. The planetary gear can rotate around the planet pin and also revolve around the planet carrier. The ring gear is fixed, the power is input by the planetary gear, and the planet carrier is output. The power is input to the sun gear of the first-stage NGW planetary gear train by the motor. Since the ring gear is fixed, the power is transmitted to the sun gear of the second-stage NGW planetary gear train through the planet carrier. In this way, the power is finally output from the planet carrier of the fourth-stage NGW planetary gear train. However, this scheme has many stages, all of which are NGW planetary gear trains, the structure is complex, the number of parts is large, which leads to heavy overall weight, low power density, high manufacturing and assembly cost, and low transmission efficiency. SUMMARY

[0003] In order to overcome the above-mentioned defects of the prior art, the utility model provides a novel fan yaw variable pitch system transmission structure to solve the problems existing in the above background technology.

[0004] The utility model provides the following technical scheme: a novel fan yaw variable pitch system transmission structure, comprising a motor, the one side of motor is fixedly connected with pinion, the outer surface of pinion is meshed with gear wheel, the one side of gear wheel is equipped with first sun gear, the outer surface of first sun gear is meshed with double planetary gear, the outer surface other end of double planetary gear is meshed with first ring gear, the one side of double planetary gear is movably connected with first planet carrier, the one side of first planet carrier is fixedly connected with second sun gear, the outer surface of second sun gear is meshed with planetary gear, the one side of outer surface of planetary gear is meshed with second ring gear, the one side of planetary gear is movably connected with second planet carrier.

[0005] Further, the gear wheel and the first sun gear are connected with a transmission shaft at the shaft center, and the first planet carrier and the second sun gear are connected with a transmission shaft at the shaft center.

[0006] Further, the planet gear is a single gear, the top of the outer surface of the planet gear is connected with the second ring gear in meshing, and the bottom of the outer surface of the planet gear is connected with the second sun gear in meshing.

[0007] Further, the double planet gear includes two gears of different sizes, the large gear is connected with the first sun gear in meshing, and the small gear is connected with the first ring gear in meshing.

[0008] Further, the first sun gear is on the same horizontal line as the shaft center of the first planet carrier and the second planet carrier.

[0009] The technical effects and advantages of the utility model are as follows:

[0010] Compared with the transmission scheme of the four-stage NGW planetary gear train in series, the utility model has simpler structure, fewer parts such as gears and bearings, lighter weight, and lower manufacturing and assembly cost.

[0011] Meanwhile, based on the torque interval of each applicable parallel shaft gear, NW compound planetary gear train and NGW planetary gear train, the order of the three structures in the transmission chain is ingeniously arranged, and the transmission ratio is reasonably distributed, so that each transmission structure is in the respective optimal applicable range, so that the overall scheme has higher efficiency, lighter weight and greater power density.

[0012] The NW compound planetary gear train has the advantages of high transmission ratio and high efficiency, and the innovative use makes the overall transmission scheme structure more compact and has higher power density. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall internal structure of the utility model.

[0014] The reference signs are as follows: 1, motor; 2, large gear; 3, small gear; 4, first sun gear; 5, double planet gear; 6, first ring gear; 7, first planet carrier; 8, second sun gear; 9, planet gear; 10, second ring gear; 11, second planet carrier. DETAILED DESCRIPTION

[0015] The technical scheme of the utility model will be described clearly and completely in combination with the drawings in the utility model, and in addition, the forms of each structure described in the following embodiments are only examples, and the novel fan yaw and variable pitch system transmission structure involved in the utility model is not limited to each structure described in the following embodiments, and all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0016] REFERENCE Figure 1The utility model provides a novel fan drift variable pitch system transmission structure, including motor 1, motor 1 one side fixed connection has pinion 3, the outer surface of pinion 3 is engaged with connection has spur gear 2, the one side of spur gear 2 is equipped with first sun gear 4, the outer surface of first sun gear 4 is engaged with connection has double planetary gear 5, the outer surface another end of double planetary gear 5 is engaged with connection has first ring gear 6, one side swing of double planetary gear 5 has first planetary carrier 7, one side fixed connection of first planetary carrier 7 has second sun gear 8, the outer surface of second sun gear 8 is engaged with connection has planetary gear 9, the outer surface one side of planetary gear 9 is engaged with connection has second ring gear 10, one side swing of planetary gear 9 has second planetary carrier 11, first sun gear 4, double planetary gear 5, first ring gear 6 and first planetary carrier 7 constitute NW compound planetary gear train, and the double planetary gear 5 of fixing on a shaft can together revolve around planet pin autorotation, can also revolve around first planetary carrier 7, first ring gear 6 is fixed, and power is input by first sun gear 4, and is exported by first planetary carrier 7 after the speed reduction of NW compound planetary gear train increases the twist.

[0017] In a preferred embodiment, the large gear 2 is connected with the transmission shaft at the axis of the first sun gear 4, and the first planetary carrier 7 is connected with the transmission shaft at the axis of the second sun gear 8.

[0018] In a preferred embodiment, the planetary gear 9 is a single gear, the top of the outer surface of the planetary gear 9 is engaged with the second ring gear 10, and the bottom of the outer surface of the planetary gear 9 is engaged with the second sun gear 8.

[0019] In a preferred embodiment, the double planetary gear 5 includes two gears of different sizes, the large gear is engaged with the first sun gear 4, and the small gear is engaged with the first ring gear 6.

[0020] In a preferred embodiment, the axes of the first sun gear 4, the first planetary carrier 7, and the second planetary carrier 11 are on the same horizontal line.

[0021] The utility model discloses a novel fan drift variable pitch system transmission structure, including motor 1, motor 1 one side fixed connection has pinion 3, the outer surface of pinion 3 is engaged with connection has spur gear 2, the one side of spur gear 2 is equipped with first sun gear 4, the outer surface of first sun gear 4 is engaged with connection has double planetary gear 5, the outer surface another end of double planetary gear 5 is engaged with connection has first ring gear 6, one side swing of double planetary gear 5 has first planetary carrier 7, one side fixed connection of first planetary carrier 7 has second sun gear 8, the outer surface of second sun gear 8 is engaged with connection has planetary gear 9, the outer surface one side of planetary gear 9 is engaged with connection has second ring gear 10, one side swing of planetary gear 9 has second planetary carrier 11, first sun gear 4, double planetary gear 5, first ring gear 6 and first planetary carrier 7 constitute NW compound planetary gear train, and the double planetary gear 5 of fixing on a shaft can together revolve around planet pin autorotation, can also revolve around first planetary carrier 7, first ring gear 6 is fixed, and power is input by first sun gear 4, and is exported by first planetary carrier 7 after the speed reduction of NW compound planetary gear train increases the twist.

[0022] The power is input to the pinion 3 of the first-stage parallel shaft gear by the motor 1, is transmitted to the first sun gear 4 of the second-stage NW compound planetary gear train after being reduced and increased in torque by the first-stage parallel shaft gear, is output to the second sun gear 8 of the third-stage NGW planetary gear train by the first carrier 7 after being reduced and increased in torque by the second-stage NW compound planetary gear train due to the fixing of the first ring gear 6 in the structure, is output by the second carrier 11 after being reduced and increased in torque by the third-stage NGW planetary gear train due to the fixing of the second ring gear 10 in the structure, and finally is output.

[0023] Finally, it should be pointed out that: first, in the description of the present application, it should be pointed out that unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, which can be mechanical connection or electrical connection, or the communication between two elements, or direct connection, "up", "down", "left", "right" and the like are only used to represent the relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may change;

[0024] Secondly: the present application discloses the structure involved in the embodiment of the present application in the drawings, other structures can refer to the usual design, in the case of no conflict, the same embodiment and different embodiments of the present application can be combined with each other;

[0025] Finally: the above only for the preferred embodiment of the present application, and does not limit the present application, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application, should be included in the protection scope of the present application.

Claims

1. A new type of yaw variable pitch system transmission structure of a wind turbine, comprising a motor (1), characterized in that: The motor (1) is fixedly connected with a pinion (3) on one side, the outer surface of the pinion (3) is meshedly connected with a large gear (2), one side of the large gear (2) is provided with a first sun gear (4), the outer surface of the first sun gear (4) is meshedly connected with a double planetary gear (5), the outer surface of the double planetary gear (5) is meshedly connected with a first ring gear (6) at the other end, one side of the double planetary gear (5) is movably connected with a first planetary carrier (7), one side of the first planetary carrier (7) is fixedly connected with a second sun gear (8), the outer surface of the second sun gear (8) is meshedly connected with a planetary gear (9), one side of the outer surface of the planetary gear (9) is meshedly connected with a second ring gear (10), one side of the planetary gear (9) is movably connected with a second planetary carrier (11).

2. A new type of yaw variable pitch system transmission structure of a fan, according to claim 1, characterized in that: The large gear (2) and the first sun gear (4) are connected with a transmission shaft at the axial center, the first planetary carrier (7) and the second sun gear (8) are connected with a transmission shaft at the axial center.

3. The new transmission structure of fan yaw variable pitch system according to claim 1, characterized in that: The planetary gear (9) is a single gear, the outer surface of the planetary gear (9) is meshedly connected with the second ring gear (10) at the top, and the outer surface of the planetary gear (9) is meshedly connected with the second sun gear (8) at the bottom.

4. The new transmission structure of fan yaw variable pitch system according to claim 1, characterized in that: The double planetary gear (5) includes two gears of different sizes, the large gear is meshedly connected with the first sun gear (4), and the small gear is meshedly connected with the first ring gear (6).

5. The new transmission structure of fan yaw variable pitch system according to claim 1, characterized in that: The first sun gear (4) is on the same horizontal line with the axial center of the first planetary carrier (7) and the second planetary carrier (11).

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