Planetary gear speed increaser

Abstract

The present invention discloses a planetary gear speed increaser, which includes a housing, a generator and a planetary gear set. The generator and the planetary gear set are arranged inside the housing. The planetary gear set includes an input internal gear and an output sun gear. The input internal gear is fixedly connected to the housing, and the output sun gear is fixedly connected to the input shaft of the generator. The planetary gear speed increaser provided by the present invention has a compact structure and is convenient to assemble.

Description

Technical Field

[0001] The present invention relates to the technical field of generators, and more specifically, to a planetary gear speed increaser for a wind or wave generator. Background Art

[0002] Planetary gears are used in many technical fields, especially in the technical fields of wind and wave generators. Generally, the forces of wind and waves are not large, the speed of driving the generator is low, and the power generation is limited. Therefore, speed increase is required to improve power generation.

[0003] Chinese Patent Document CN101429991A discloses a planetary gear speed increaser for hydroelectric power generation, which is composed of a speed increasing planetary gear pair, a box body, a lubricating device and a ventilation cover. The speed increasing planetary gear pair is installed in the box body with low-speed input and high-speed output. The box body is configured with a ventilation cover and lubricating devices at different positions. The rotating frame shaft is connected to the water turbine through a toothed coupling, and the high-speed shaft is connected to the motor through an elastic pin coupling. During operation, the low-speed rotating frame shaft drives three planetary gears, and the three planetary gears are respectively meshed with the sun gear shaft and the internal gear ring. The sun gear is connected to the high-speed shaft through a floating internal gear sleeve to drive the rotation of the high-speed shaft, so as to drive the motor to rotate and achieve speed increase. The structure is complicated. Summary of the Invention

[0004] The purpose of the present invention is to provide a planetary gear speed increaser with a compact structure and convenient assembly.

[0005] The technical solution adopted by the planetary gear speed increaser disclosed by the present invention is as follows:

[0006] A planetary gear speed increaser includes a housing, a generator and a planetary gear set. The generator and the planetary gear set are arranged in the housing. The planetary gear set includes an input internal gear and an output sun gear. The input internal gear is fixedly connected to the housing, and the output sun gear is fixedly connected to the input shaft of the generator.

[0007] As a preferred solution, the planetary gear set includes an input internal gear, a bracket, a plurality of first-stage planetary gears, a second-stage internal gear, a second-stage planetary carrier, a plurality of second-stage planetary gears and an output sun gear. The bracket is provided with a plurality of first-stage planetary shafts and through holes. The first-stage planetary gears are arranged on the planetary shafts of the bracket. The first-stage planetary gears are meshed with the input internal gear teeth. The second-stage internal gear is provided with first-stage sun teeth, and the first-stage sun teeth are meshed with the first-stage planetary gears. The second-stage planetary carrier is provided with second-stage planetary shafts and through holes. The second-stage planetary gears are arranged on the second-stage planetary shafts of the second-stage planetary carrier. The second-stage planetary gears are respectively meshed with the second-stage internal gear and the output sun gear. The input shaft of the generator passes through the through hole of the bracket and the through hole on the second-stage planetary carrier and is fixedly connected to the output sun gear.

[0008] As a preferred solution, the output sun gear is provided with star-shaped holes, the input shaft of the generator is arranged in the star-shaped holes of the output sun gear, and the outer shape of the input shaft of the generator is matched with the star-shaped holes of the output sun gear.

[0009] As a preferred solution, the housing includes a fairing and a gearbox cover, the input internal gear is fixed to the gearbox cover, and the fairing is fixedly connected to the gearbox cover.

[0010] As a preferred solution, the planetary gear speed increaser further includes a gland, a semi-circular piece, an outer semi-circular piece and a top cap. The gearbox cover is provided with an output hole. The output shaft of the generator is fixedly connected to the top cap. The gland, the semi-circular piece and the outer semi-circular piece are sleeved on the output shaft of the generator, and the semi-circular piece and the outer semi-circular piece are arranged between the gland and the top cap.

[0011] The beneficial effects of the planetary gear speed increaser disclosed by the present invention are as follows: The input internal gear is fixedly connected to the housing, the output sun gear is fixedly connected to the input shaft of the generator, the generator and the planetary gear set are arranged in the housing. When the housing rotates, it drives the input internal gear to rotate. Through the speed increase of the planetary gear set, the output sun gear drives the generator to rotate at a high speed for power generation. The structure is compact, and the assembly is simple and convenient.

[0012] The planetary gear set includes an input internal gear, a bracket, a plurality of first-stage planetary gears, a second-stage internal gear, a second-stage planetary carrier, a plurality of second-stage planetary gears and an output sun gear. Through two-stage planetary gears, the speed ratio is increased and the power generation efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a three-dimensional schematic diagram of the planetary gear speed increaser of the present invention;

[0014] Figure 2 is an exploded structural schematic diagram of the planetary gear speed increaser of the present invention;

[0015] Figure 3 is a structural schematic diagram of the second-stage internal gear of the planetary gear speed increaser of the present invention;

[0016] Figure 4 is a structural schematic diagram of the output sun gear of the planetary gear speed increaser of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0017] The following further elaborates and explains the present invention in conjunction with specific embodiments and the accompanying drawings of the specification:

[0018] Please refer to Figure 1 and Figure 2 , a planetary gear speed increaser, including a housing, a generator 20, a planetary gear set, a gland 60, a semi-circular piece 72, an outer semi-circular piece 71 and a top cap 80. The generator 20 and the planetary gear set are arranged in the housing.

[0019] The housing includes a fairing 11 and a gearbox cover 12. The end face of the fairing 11 is provided with threaded holes 111, and the inner surface of the fairing 11 is provided with a first bearing seat and a large bearing ring groove (not shown in the figure). The first bearing seat is provided with a first bearing 42. The surface of the gearbox cover 12 is provided with screw holes 121, and one end is provided with an output hole 122. The inner surface of the gearbox cover is provided with a second bearing seat (not shown in the figure), and the second bearing seat is provided with a second bearing 41.

[0020] The planetary gear set includes an input internal gear 31, a carrier 32, several first-stage planetary gears 33, a second-stage internal gear 36, a carrier cover 34, a large bearing 35, a second-stage planet carrier 38, several second-stage planetary gears 37, and an output sun gear 39. The input internal gear 31 is annular, and the input internal gear 31 is provided with screw connection holes and transmission teeth. The carrier 32 is provided with several first-stage planetary shafts and through holes. A spacer 50 and a carrier cover 34 are sleeved on the first-stage planetary shafts. The first-stage planetary gears 33 are arranged on the planetary shafts of the carrier 32. The spacer 50 is arranged between the carrier 32 and the first-stage planetary gears 33. The first-stage planetary gears 33 are arranged between the carrier 32 and the carrier cover 34. The carrier cover 34 is annular, and the carrier cover 34 is used to isolate the generator 20 from the first-stage planetary gears 33. The first-stage planetary gears 33 mesh with the input internal gear 31.

[0021] Please refer to Figure 3 , the second-stage internal gear 36 is provided with a tooth disc 363, a tooth ring 362, a first-stage sun gear 361, and a light hole 364. The tooth ring 362 and the first-stage sun gear 361 are respectively arranged on both sides of the tooth disc 363. The light hole 364 penetrates the tooth disc 363 and the first-stage sun gear 361. The large bearing 35 is arranged at the large bearing ring groove on the inner surface of the fairing 11 and is sleeved on the outer surface of the second-stage internal gear 36, playing a role in supporting the second-stage internal gear 36 and facilitating its rotation.

[0022] The first-stage sun gear 361 meshes with the first-stage planetary gears 33. The second-stage planet carrier 38 is provided with second-stage planetary shafts and through holes. The second-stage planetary gears 37 are arranged on the second-stage planetary shafts of the second-stage planet carrier 38. The output sun gear 39 is arranged in the through hole of the second-stage planet carrier 38. The second-stage planetary gears 37 respectively mesh with the tooth ring 362 of the second-stage internal gear 36 and the output sun gear 39.

[0023] Please refer to Figure 4 , the output sun gear 39 is provided with a star-shaped hole 391. The output sun gear 39 is arranged in the first bearing 42, and the first bearing 42 plays a role in supporting the output sun gear 39 and facilitating its rotation.

[0024] The input shaft of the generator 20 passes through the through-hole of the bracket 32, the light hole 364 of the second-stage internal gear 36, and the through-hole on the second-stage planet carrier 38, and is inserted into the star-shaped hole 391 of the output sun gear 39. The outer shape of the input shaft of the generator 20 is matched with the star-shaped hole 391 of the output sun gear 39. When the output sun gear 39 rotates, the input shaft of the generator 20 rotates along with the output sun gear 39. The second bearing 41 is sleeved on the output shaft of the generator 20. The output shaft of the generator 20 passes through the output hole 122 of the gearbox cover 12, the gland 60, the semi-circular piece 72, the outer semi-circular piece 71 and is fixedly connected with the top cap 80. The gland 60 is fixed on the gearbox cover 12, and the semi-circular piece 72 and the outer semi-circular piece 71 are arranged between the gland 60 and the top cap 80.

[0025] The flow guide cover 11, the input internal gear 31 and the gearbox cover 12 are threadedly connected through the screw holes 121 on the surface of the gearbox cover 12, the screw connection holes on the input internal gear 31 and the threaded holes 111 on the end face of the flow guide cover 11 to fix the flow guide cover 11, the input internal gear 31 and the gearbox cover 12.

[0026] When the fluid-driven housing, i.e., the flow guide cover 11 and the gearbox cover 12, rotates, it drives the input internal gear 31 to rotate. By using the speed ratio of the planetary gear set, the rotation speed is increased, driving the generator to rotate at a high speed and improving the power generation efficiency. Driven by the outer shell, compared with the axial input transmission, the structure is more compact and the assembly is more convenient.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A planetary gear speed increaser, comprising a housing, a generator and a planetary gear set, the generator and the planetary gear set being arranged inside the housing, characterized in that, The planetary gear set includes an input internal gear and an output sun gear. The input internal gear is fixedly connected to the housing, and the output sun gear is fixedly connected to the input shaft of the generator. The planetary gear set includes an input internal gear, a carrier, a plurality of first-stage planet gears, a second-stage internal gear, a second-stage planet carrier, a plurality of second-stage planet gears, and an output sun gear. The carrier is provided with a plurality of first-stage planet shafts and through holes. The first-stage planet gears are arranged on the planet shafts of the carrier. The first-stage planet gears mesh with the input internal gear teeth. The second-stage internal gear is provided with first-stage sun teeth, and the first-stage sun teeth mesh with the first-stage planet gears. The second-stage planet carrier is provided with second-stage planet shafts and through holes. The second-stage planet gears are arranged on the second-stage planet shafts of the second-stage planet carrier. The second-stage planet gears mesh with the second-stage internal gear and the output sun gear respectively. The input shaft of the generator passes through the through hole of the carrier and the through hole on the second-stage planet carrier and is fixedly connected to the output sun gear. The planetary gear set further includes a carrier cover. The first-stage planet gears are arranged between the carrier and the carrier cover, and the carrier cover is used to isolate the generator from the first-stage planet gears. The housing includes a fairing and a gearbox cover. The input internal gear is fixed to the gearbox cover, and the fairing is fixedly connected to the gearbox cover. One end of the gearbox cover is provided with an output hole, and the output shaft of the generator passes through the output hole of the gearbox cover.

2. The planetary gear speed increaser according to claim 1, wherein, The output sun gear is provided with a star-shaped hole, and the input shaft of the generator is arranged in the star-shaped hole of the output sun gear. The outer shape of the input shaft of the generator matches the star-shaped hole of the output sun gear.

3. The planetary gear speed increaser according to claim 1, wherein, It further includes a gland, a semi-circular piece, an outer semi-circular piece, and a top cap. The gearbox cover is provided with an output hole. The output shaft of the generator is fixedly connected to the top cap. The gland, the semi-circular piece, and the outer semi-circular piece are sleeved on the output shaft of the generator. The semi-circular piece and the outer semi-circular piece are arranged between the gland and the top cap.

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