WO2019242531A1

WO2019242531A1 - Power transmission device and wind turbine having same

Info

Publication number: WO2019242531A1
Application number: PCT/CN2019/090728
Authority: WO
Inventors: 高则行; 马文平
Original assignee: 高则行; 马文平
Priority date: 2018-06-19
Filing date: 2019-06-11
Publication date: 2019-12-26
Also published as: CN108591400B; CN108591400A

Abstract

Provided is a power transmission device (1), comprising: a horizontal shaft (2); a vertical shaft (3); a gear box (4) used to transfer rotation of the horizontal shaft (2) to the vertical shaft (3); a motor (5) used to drive the horizontal shaft (2) to rotate around a vertical axis (100); and a differential (6), rotation of the vertical shaft (3) being transferred to a first half-shaft (61) of the differential (6), rotation of an output shaft of the motor (5) being transferred to a differential housing (63) by means of a rotation speed compensation mechanism, wherein a ratio of a rotation speed of the horizontal shaft (2) rotating around the vertical axis (100) to a rotation speed of the differential housing (63) is 2 : 1. Also provided is a wind turbine having the power transmission device (1).

Description

Power transmission device and wind turbine including the same

This disclosure claims the priority of a Chinese patent application filed with the Chinese Patent Office on June 19, 2018, with application number 201810631335.1. The entire contents of the above application are incorporated herein by reference.

Technical field

This document relates to the field of power transmission technology, for example, to a power transmission device and a wind turbine including such a power transmission device.

Background technique

At present, in many technical fields, the problem of transmitting power between the slewing frame and the fixed end is encountered, such as the problem of transmitting power between a horizontal axis provided on the slewing frame and the fixed end. Among them, the frame can be rotated, so that the angular position of the horizontal axis about the vertical axis can be adjusted, but usually the rotation of the rotary frame is subject to various restrictions and cannot be completely freely rotated. For example, in a high-rise tower crane, the motor is installed below the control room at high altitude to drive the control room and the boom to rotate around the tower body. To transmit power to the motor, cables need to be laid from the ground up. In order to prevent the cable from being damaged due to excessive twisting, the control room and the boom cannot be rotated indefinitely.

For example, in the field of wind power generators, the above problems exist, and the head of the wind power generator and the tower cannot be rotated indefinitely.

As an excellent clean energy source, wind energy has been valued by countries around the world. Currently used wind power generators generally include wind wheels, mechanical transmission systems (such as speed increasers, etc.) and generators. The wind wheel rotates under the action of the wind, and the obtained kinetic energy is transmitted to the generator through the mechanical transmission system, and the generator converts the kinetic energy into electrical energy. The mechanical drive system and the generator are enclosed in a nacelle and then mounted on the top of the tower by means of a rotary support to form the nose of the wind turbine. On the one hand, the head, especially the head of large and medium-sized wind turbines, has a very large weight, which can reach tens of tons to hundreds of tons. Therefore, the requirements for the rotary support device are extremely high, which results in high manufacturing costs of the rotary support device. The heavy machine head requires special mechanical wind measurement and countermeasures, which further increases the volume, weight and structural complexity of the machine head. The weight and volume of the nose also brought a lot of difficulties to transportation and installation. On the other hand, since the generator is installed in a nacelle that is swinging with the wind, the cables used to transmit power outside may be twisted, so the wind turbine also needs to be equipped with corresponding unwinding and twisting cable protection devices. It can be seen that the current structure of wind turbines is complex, and the costs in terms of manufacturing, transportation, installation, and maintenance are very large, which has become one of the factors hindering the widespread use of wind energy.

According to the latest circular issued by the National Energy Administration regarding the requirements related to wind power construction management, newly-added centralized onshore wind power projects and offshore wind power projects with unspecified investment entities should all be allocated and determined through competition. China's renewable energy industry has opened a new era, and bidding for the Internet has brought new challenges and opportunities. This management method clearly proposes a plan under the premise of ensuring that consumption is eliminated, at least for newly added projects. Optimizing the industrial environment and squeezing the numerous parasitic interests on the long wind power value chain have further brought wind power development back to the nature of technology. At the same time, wind power companies will also face challenges brought by fierce competition in on-grid electricity prices.

Summary of the Invention

This article provides a simple structured power transmission device that can transmit power between a fixed end and a frame that can be swiveled without restriction, while the rotation of the frame will not affect the power transmission at the fixed end. The power transmission device can be flexibly applied to a plurality of fields that need to transmit power between a slewing frame and a fixed end, such as a wind turbine field.

A power transmission device is proposed herein, the power transmission device includes: a horizontal axis; a vertical axis; a gear box configured to transmit rotation of the horizontal axis to the vertical axis; a motor configured to drive the The horizontal shaft rotates around a vertical axis; a differential, the rotation of the vertical shaft is transmitted to the first half shaft of the differential, and the rotation of the output shaft of the motor is transmitted to the differential of the differential A speeder housing, wherein a ratio of a rotation speed of the horizontal shaft to the vertical axis to a rotation speed of the differential housing is 2: 1.

This paper also proposes a wind turbine, which includes: a wind blade; the power transmission device described above, the wind blade is mounted on a horizontal axis of the power transmission device.

BRIEF DESCRIPTION OF THE DRAWINGS

The following describes in detail the present invention with reference to the accompanying drawings in conjunction with optional embodiments. In the drawings:

FIG. 1 schematically illustrates a power transmission device according to an alternative embodiment herein;

FIG. 2 schematically illustrates a power transmission device according to another alternative embodiment herein;

Fig. 3 schematically illustrates a power transmission device according to yet another alternative embodiment herein;

FIG. 4 schematically illustrates a wind turbine including the power transmission device shown in FIG. 1;

FIG. 5 schematically illustrates a wind turbine including the power transmission device shown in FIG. 2.

In the drawings, the same or similarly acting elements are denoted by the same reference numerals, and similar or similarly acting elements are denoted by similar reference numerals. The drawings are only for purposes of illustration and the dimensions shown are merely schematic.

detailed description

Fig. 1 shows a power transmission device 1 according to an alternative embodiment herein. The power transmission device 1 includes a horizontal shaft 2, a vertical shaft 3, a gear box 4 that transmits rotation of the horizontal shaft 2 to the vertical shaft 3, and is configured to drive the horizontal shaft 2 around a vertical axis. 100-rotating motor 5 and differential 6.

The differential 6 may use various known differentials or differential transmission mechanisms. In the alternative embodiment shown in FIG. 1, the differential 6 includes a differential case 63 and two half shafts, that is, a first half shaft 61 and a second half shaft 62. The differential 6 may further include a first A first bevel gear integrally formed with the half shaft 61, a second bevel gear integrally formed with the second half shaft 62, located between the first bevel gear and the second bevel gear and simultaneously with the two bevels A plurality of planet gears meshed by the gears and a planetary carrier supporting the planet gears. The first differential case 63 surrounds the above-mentioned members and is formed integrally with the planetary carrier. The rotation speed of the first half shaft 61 and the rotation speed of the second half shaft 62 satisfy the following relationship:

2n0 = n1 + n2

Among them, n0 is the rotation speed of the differential case, n1 is the rotation speed of the first half shaft, and n2 is the rotation speed of the second half shaft 62. The structure and principle of the differential are well known to those skilled in the art and will not be described in detail here.

In the embodiment shown in FIG. 1, the gear box 4 is a first bevel gear transmission mechanism, and the first bevel gear transmission mechanism is composed of a first bevel gear 41 and a second bevel gear 42 that mesh with each other. A bevel gear 41 is fixedly disposed on the horizontal shaft 2, the second bevel gear 42 is fixedly disposed on the vertical shaft 3, and the rotation of the horizontal shaft 2 is transmitted through the first bevel gear transmission mechanism 4. The first bevel gear 41 and the second bevel gear 42 meshed with the first bevel gear 41 are transmitted to the vertical shaft 3. The vertical shaft 3 is connected to the first half shaft 61 of the differential 6 or the first half shaft 61 of the differential 6.

The power transmission device 1 further includes a frame 7, the horizontal shaft 2 is supported in the frame 7, and the frame 7 is supported on the fixed bracket 8 through a bearing 15. An internal ring gear 71 is provided on the frame 7. A first motor gear 51 fixedly mounted on the output shaft of the motor 5 meshes with the internal ring gear 71. The rotation of the output shaft of the motor 5 is transmitted through the first The motor gear 51 and the ring gear 71 on the frame are transmitted to the frame 7, which drives the horizontal shaft 2 supported on the frame 7 to perform a rotational movement about the vertical axis 100.

At the same time, the rotation of the output shaft of the motor 5 is transmitted to the mesh with the idler gear 92 through the first cylindrical gear 91 fixedly mounted on the output shaft of the motor 5 and the idler gear 92 meshing with the first cylindrical gear 91. The differential case 63.

Here, the ratio of the rotational speed of the ring gear 71 to the differential case 63 is 2: 1, so that the ratio of the rotational speed of the frame 7 to the differential case 63 is 2: 1, that is, The ratio of the rotation speed of the horizontal shaft 2 around the vertical axis 100 to the rotation speed of the differential case 63 is 2: 1. That is, the differential case 63 only makes one revolution when the chassis 7 makes two revolutions. In this case, the rotation output at the second half shaft 62 of the differential 6 is related to the rotation of the horizontal shaft 2 about the horizontal axis, and to the rotation of the output shaft of the motor, or to the horizontal The rotation of the shaft 2 about the vertical axis 100 is irrelevant.

Fig. 2 shows a power transmission device 1 'according to another alternative embodiment herein. Similar to the power transmission device 1 shown in FIG. 1, the power transmission device 1 ′ includes a horizontal shaft 2, a vertical shaft 3, and a gear configured to transmit the rotation of the horizontal shaft 2 to the vertical shaft 3. A box 4 ′, a motor 5 and a differential 6 are provided to drive the horizontal shaft 2 to rotate about a vertical axis 100.

Different from the embodiment shown in FIG. 1, in the embodiment shown in FIG. 2, the gear box 4 ′ is a two-stage gear transmission mechanism, and the two-stage gear transmission mechanism includes a first cylindrical gear transmission mechanism and a second gear transmission mechanism. Bevel gear transmission. The first spur gear transmission mechanism is composed of a first spur gear 43 fixedly mounted on the horizontal shaft 2 and a second spur gear 44 meshing with the first spur gear 43. The second bevel gear transmission mechanism It consists of a first bevel gear 45 fixedly mounted on the shaft of the second spur gear 44 and a second bevel gear 46 meshing with the first bevel gear 45, and the second bevel gear 46 is fixedly mounted on the On vertical axis 3. The first cylindrical gear 43 is fixedly installed on the horizontal shaft 2, and the second cylindrical gear 44 and the first bevel gear 45 are installed on the same shaft 16. The rotation of the horizontal shaft 2 is transmitted to the vertical shaft 3 via the first spur gear transmission mechanism and the second bevel gear transmission mechanism.

The power transmission device 1 shown in FIG. 2 also includes a frame 7. The horizontal shaft 2 is supported in the frame 7. The frame 7 is supported on the fixed bracket 8 through a bearing 15. An internal ring gear 71 is provided on the frame 7, and a first motor gear 51 fixedly mounted on the output shaft of the motor 5 meshes with the internal ring gear 71. The rotation speed of the output shaft of the motor 5 is passed through the first The motor gear 51 and the ring gear 71 on the frame are transmitted to the frame 7 to drive the horizontal shaft 2 supported on the frame 7 to move around the vertical axis 100.

At the same time, the rotation of the output shaft of the motor also passes through the first motor gear 51, the ring gear 71 provided on the frame 7 and meshing with the first motor gear 51, and the ring gear A gear 52 meshed at 71 is transmitted to the differential case 63 by a one or more-stage gear transmission mechanism 10 provided between the gear 52 and the differential case 63 as required. For example, in the alternative embodiment shown in FIG. 2, a two-stage gear transmission mechanism 10 is provided between the gear 52 and the differential case 63.

Here, the ratio of the rotational speed of the ring gear 71 to the differential case 63 is 2: 1, so that the ratio of the rotational speed of the frame 7 to the differential case 63 is 2: 1, that is, The ratio of the rotation speed of the horizontal shaft 2 around the vertical axis 100 to the rotation speed of the differential case 63 is 2: 1. In this way, the rotation output at the second half shaft 62 of the differential 6 is related to the rotation of the horizontal shaft 2 about the horizontal axis, and to the rotation of the output shaft of the motor 5, or to the rotation of the output shaft of the motor 5. The rotation of the horizontal axis 2 about the vertical axis 100 is irrelevant.

FIG. 3 shows a power transmission device 1 ″ according to yet another alternative embodiment of the present invention. Similar to the power transmission device 1 shown in FIG. 1, the power transmission device 1 ″ also includes a horizontal axis 2 and a vertical axis 3. A gearbox 4 configured to transmit the rotation of the horizontal shaft 2 to the vertical shaft 3, a motor 5 configured to drive the horizontal shaft 2 to rotate about a vertical axis 100, and a differential 6. The gear box 4 is a first bevel gear transmission mechanism composed of a first bevel gear 41 and a second bevel gear 42 that mesh with each other. The rotation of the horizontal shaft 2 is transmitted through the first bevel gear 41 of the first bevel gear transmission mechanism. The second bevel gear 42 meshing with the first bevel gear 41 is transmitted to the vertical shaft 3.

The power transmission device 1 ″ further includes a frame 7 in which the horizontal shaft 2 is supported. The frame 7 is supported on a fixed bracket 8 through a bearing 15. The frame 7 has a cylindrical shape. A lower extension 17 extends into the fixing bracket 8. An outer ring gear 72 is provided on the lower extension 17. The first motor gear 51 and the outer gear 51 fixedly mounted on the output shaft of the motor 5 The ring gear 72 meshes, and the rotation of the output shaft of the motor 5 is transmitted to the frame 7 through the first motor gear 51 and the outer ring gear 72 on the frame, driving the horizontal shaft 2 supported on the frame 7 to surround the vertical Rotational movement of the axis 100.

A second motor gear 53 is also fixed on the output shaft of the motor 5, and the second motor gear 53 meshes with the teeth 18 on the differential case 63. The rotation of the output shaft of the motor 5 is transmitted to the differential case 63 via the second motor gear 53. Here, the rotation speed ratio of the outer ring gear 72 to the differential case 63 is 2: 1. In this case, the rotation output at the second half shaft 62 of the differential 6 is related to the rotation of the horizontal shaft 2 about the horizontal axis, and is related to the rotation of the output shaft of the motor 5 or the frame The rotation is not related to the rotation of the horizontal axis 2 about the vertical axis 100.

FIG. 4 shows a wind turbine according to an alternative embodiment herein, the wind turbine comprising a power transmission device as shown in FIG. 1. The wind turbine has a wind blade 14 which is mounted on the horizontal axis 2. The wind blade 14 is driven by the wind to drive the horizontal shaft 2 to rotate about a horizontal axis. The rotation of the horizontal shaft 2 is transmitted to the vertical shaft via the first bevel gear 41 and the second bevel gear 42 of the gear box 4. 3, which is further transmitted to the first half shaft 61 of the differential 6.

The motor 5 of the wind turbine can output rotation. The first motor gear 51 fixedly installed on the output shaft of the motor 5 and the ring gear meshed with the first motor gear 51 provided on the frame 7 71 drives the frame 7 to rotate, thereby driving the wind blades 14 supported on the frame 7 to rotate about the vertical axis 100.

At this time, the output of the motor 5 is also transmitted to the differential case 63 via another gear 91 fixedly mounted on the output shaft thereof, and an idler gear 92 meshing with the other gear 91. If the speed ratio of the ring gear 71 to the differential case 63 is 2: 1, the rotation output at the second half shaft 62 of the differential 6 and the horizontal axis 2 around the horizontal axis The rotation is related to the rotation of the output shaft of the motor, or the rotation of the horizontal axis 2 about the vertical axis 100.

The rotation of the second half shaft 62 of the differential 6 is continuously transmitted to the ground. For example, the rigid shaft or the flexible shaft (such as a vibrating rod) connected to the second half shaft 62 is transmitted to the ground, and is transmitted through the second cylinder. The gear transmission mechanism 11 and the third bevel gear transmission mechanism 12 convert the rotation of the second half shaft 62 about the vertical axis 100 to the rotation about the horizontal axis 200, and then drive the generator G to generate electricity or drive a pump (such as a water pump or Oil pump, etc.). In an alternative embodiment shown in FIG. 4, the second spur gear transmission mechanism 11 is composed of two spur gears that mesh with each other, and the third bevel gear transmission mechanism 12 is configured with two spur gears that mesh with each other. The shaft of one cylindrical gear of the second spur gear transmission mechanism 11 is connected to or integrated with the second half shaft 62, and the other cylindrical gear is installed on the same as one of the bevel gears of the third bevel gear transmission mechanism 12. On the root intermediate shaft, the shaft of the other bevel gear in the third bevel gear transmission mechanism 12 is connected to, for example, the input shaft of generator G, which drives generator G to generate electricity, or is connected to the input of a pump (such as a water pump or an oil pump). Shaft to drive the pump.

FIG. 5 shows a wind turbine according to another optional embodiment herein, which includes a tower top mechanism I, a tower barrel mechanism II, and a tower bottom mechanism III. The tower top mechanism I includes a power transmission device 1 'as shown in FIG. 2, and further includes a pitch driving mechanism 13, which is configured to change the windward angle of the blades 14. The generator G is arranged in the tower bottom mechanism III. For clarity, a part of the same reference numerals as those shown in FIG. 2 are omitted in FIG. 5.

Specifically, the wind blade 14 is driven by the wind to drive the horizontal shaft 2 to rotate about the horizontal axis. The rotation of the horizontal shaft 2 about the horizontal axis passes through the first cylindrical gear 43 and the second cylindrical gear 44 of the gear box 4 ′. The first bevel gear 45 and the fourth bevel gear 46 are transmitted to the vertical shaft 3 and then to the first half shaft 61 of the differential 6.

The motor 5 of the wind turbine can output rotation. The frame 7 is driven to rotate by a first motor gear 51 fixedly installed on the output shaft of the motor 5 and an internal ring gear 71 provided on the frame 7 and meshing with the first motor gear 51. As a result, the wind blades 14 supported on the frame 7 are driven to rotate about the vertical axis 100.

At the same time, the output of the motor 5 also passes through the first motor gear 51, the ring gear 71 provided on the frame 7 and meshing with the first motor gear 51, The gear 52 is transmitted to the differential case 63 by a one-stage or multi-stage gear transmission mechanism 10 provided between the gear 52 and the differential case 63 as required. For example, in the alternative embodiment shown in FIG. 5, a two-stage gear transmission mechanism is provided between the other gear 52 and the differential case 63.

Here, the ratio of the rotational speed of the ring gear 71 to the differential case 63 is 2: 1, so that the ratio of the rotational speed of the frame 7 to the differential case 63 is 2: 1. In this way, the rotation output at the second half shaft 62 of the differential 6 is related to the rotation of the horizontal shaft 2 about the horizontal axis, and to the rotation of the output shaft of the motor 5, or to the rotation of the output shaft of the motor 5. The rotation of the horizontal axis 2 about the vertical axis 100 is irrelevant.

The rotation of the second half shaft 62 of the differential 6 is continuously transmitted to the vicinity of the ground, and the second half shaft 62 is caused to surround the vertical axis 100 via the second cylindrical gear transmission mechanism 11 and the third bevel gear transmission mechanism 12. The rotation is converted into a rotation around the horizontal axis 200, which in turn drives the generator G to generate electricity. Similarly, the generator G can be replaced with a pump, such as a water pump or an oil pump, as needed.

If the vertical axis used to transmit the rotation of the horizontal axis downward is too long, it can be divided into multiple sections, and it is connected as a shaft through a coupling, as shown in FIG. 5.

Similar to the embodiment of the wind turbine shown in FIG. 4 and FIG. 5, a wind blade can be installed on the horizontal axis of the power transmission device shown in FIG. 3. The rotation of the wind blade is transmitted to the ground, which drives the generator to generate electricity or drives the pump to run.

A power transmission device is proposed herein, the power transmission device includes: a horizontal axis; a vertical axis; a gear box configured to transmit rotation of the horizontal axis to the vertical axis; a motor configured to drive the The horizontal shaft rotates around a vertical axis; a differential, the rotation of the vertical shaft is transmitted to the first half shaft of the differential, and the rotation of the output shaft of the motor is transmitted to the differential of the differential A speeder casing, wherein a ratio of a rotation speed of the horizontal shaft to the vertical axis to a rotation speed of the differential case is 2: 1.

In this way, the rotation of the vertical axis is only related to the rotation of the horizontal axis about its own axis, that is, the horizontal axis, and has nothing to do with the rotation of the horizontal axis about the vertical axis.

The horizontal axis may be supported on a frame, and the motor drives the frame to rotate, thereby driving the horizontal axis to rotate about a vertical axis, so that the rotation of the vertical axis only surrounds itself with the horizontal axis. The rotation of the axis is related to the rotation of the frame.

According to an optional embodiment herein, the gear box may be a first bevel gear transmission mechanism, and the first bevel gear transmission mechanism is composed of a first bevel gear and a second bevel gear that mesh with each other, and the first bevel A gear is fixedly mounted on the horizontal shaft, and the second bevel gear is fixedly mounted on the vertical shaft. Thereby, the rotation of the horizontal axis about the horizontal axis can be converted into the rotation of the vertical axis about the vertical axis by a simple transmission mechanism.

According to an alternative embodiment herein, the gear box may be a two-stage gear transmission mechanism, and the two-stage gear transmission mechanism includes a first spur gear transmission mechanism and a second bevel gear transmission mechanism, and the first spur gear transmission mechanism Consists of a first bevel gear and a second bevel gear that mesh with each other, the second bevel gear transmission mechanism is composed of a first bevel gear and a second bevel gear that mesh with each other, and the first bevel gear is fixedly installed at the level On the shaft, the second cylindrical gear and the first bevel gear are mounted on the same shaft, and the second bevel gear is fixedly mounted on the vertical shaft. Therefore, the rotation of the horizontal axis about the horizontal axis can be converted into the rotation of the vertical axis about the vertical axis through a gear box with a simple structure and a relatively even distribution.

According to an optional embodiment herein, the rotation of the output shaft of the motor may be via a first motor gear fixedly mounted on the output shaft of the motor, provided on a frame supporting the horizontal shaft, and connected to the frame. The ring gear meshed by the first motor gear is transmitted to the frame, and drives the horizontal shaft to rotate about a vertical axis. Wherein, the frame and the horizontal axis rotate around the vertical axis at the same rotation speed.

Optionally, the rotation of the output shaft of the motor may also be transmitted to the differential case via a third cylindrical gear fixedly disposed on the output shaft of the motor, and an idler gear meshing with the third cylindrical gear. The speed ratio between the ring gear on the frame and the differential case is 2: 1. Therefore, the ratio of the rotation speed of the horizontal shaft around the vertical axis to the rotation speed of the differential case is 2: 1, that is, the differential case rotates only once when the frame rotates twice. In this way, the rotation of the vertical axis is only related to the rotation of the horizontal axis about its own axis, that is, the horizontal axis, and has nothing to do with the rotation of the horizontal axis about the vertical axis.

Alternatively, the rotation of the output shaft of the motor is via the first motor gear, an internal ring gear provided on the frame and meshing with the first motor gear, and a gear meshing with the internal ring gear And a gear transmission mechanism provided between the gear and the differential case is transmitted to the differential case, wherein the ring gear on the frame and the rotational speed of the differential case The ratio is 2: 1. In this way, the rotation of the vertical axis can also be related only to the rotation of the horizontal axis about its own axis, and has nothing to do with the rotation of the horizontal axis about the vertical axis. The gear transmission mechanism may adopt one or more stages of gear transmission as required.

According to an optional embodiment herein, the shaft connected to the second half shaft of the differential is a soft shaft, such as a vibrator, which is suitable for applications with low power and suitable for narrow In space.

This paper also proposes a wind turbine, which includes: a wind blade; the power transmission device described above, the wind blade is mounted on a horizontal axis of the power transmission device. The wind turbine has all the advantages described above in connection with the power transmission device.

Claims

A power transmission device includes:

Horizontal axis (2);

Vertical axis (3);

A gearbox (4) configured to transmit rotation of the horizontal shaft (2) to the vertical shaft (3);

A motor (5) configured to drive the horizontal axis (2) to rotate about a vertical axis (100);

The differential (6), the rotation of the vertical shaft (3) is transmitted to the first half shaft (61) of the differential (6), and the rotation of the output shaft of the motor (5) is transmitted to all The differential case (63) of the differential (6),

The ratio of the rotation speed of the horizontal axis (2) around the vertical axis (100) to the rotation speed of the differential case (63) is 2: 1.
The power transmission device according to claim 1, wherein the gear box (4) is a first bevel gear transmission mechanism, and the first bevel gear transmission mechanism is composed of a first bevel gear (41) and a second bevel gear that mesh with each other. A bevel gear (42) is formed, the first bevel gear (41) is fixedly installed on the horizontal shaft (2), and the second bevel gear (42) is fixedly installed on the vertical shaft (3).
The power transmission device according to claim 1, wherein the gear box (4 ') is a two-stage gear transmission mechanism, and the two-stage gear transmission mechanism includes a first spur gear transmission mechanism and a second bevel gear transmission mechanism, The first spur gear transmission mechanism is composed of a first spur gear (43) and a second spur gear (44) meshing with each other, and the second bevel gear transmission mechanism is composed of a first bevel gear (45) and a first meshing gear A two-bevel gear (46) is formed, the first cylindrical gear (43) is fixedly mounted on the horizontal shaft (2), and the second cylindrical gear (44) and the first bevel gear (45) are mounted on On the same shaft (16), the second bevel gear (46) is fixedly mounted on the vertical shaft (3).
The power transmission device according to any one of claims 1 to 3, wherein the rotation of the output shaft of the motor (5) is via a first motor gear (fixedly mounted on the output shaft of the motor (5)) 51) An internal ring gear (71) provided on a frame (7) supporting the horizontal shaft (2) and meshing with the first motor gear (51) is transmitted to the frame (7) to drive The horizontal axis (2) rotates around the vertical axis (100).
The power transmission device according to claim 4, wherein the rotation of the output shaft of the motor (5) is further via a third cylindrical gear (91) fixedly provided on the output shaft of the motor (5), and The idler gear (92) engaged by the third spur gear (91) is transmitted to the differential case (63), and the ring gear (71) on the frame (7) and the differential case ( 63) The speed ratio is 2: 1.
The power transmission device according to claim 4, wherein the rotation of the output shaft of the motor (5) is provided on the frame (7) via the first motor gear (51) and is connected to the first An inner ring gear (71) meshed with a motor gear (51), a gear (52) meshed with the inner ring gear (71), and the gear (52) and the differential case (63) A gear transmission mechanism (10) is transmitted to the differential case (63), wherein the ring gear (71) on the frame (7) and the differential case (63) The speed ratio is 2: 1.
The power transmission device according to any one of claims 1 to 3, wherein the rotation of the output shaft of the motor (5) is via a first motor gear (fixedly mounted on the output shaft of the motor (5)) 51) an external ring gear (72) provided on a frame (7) supporting the horizontal shaft (2) and meshing with the first motor gear (51) is transmitted to the frame (7), driving The horizontal axis (2) rotates around the vertical axis (100).
The power transmission device according to claim 7, wherein a second motor gear (53) is fixedly mounted on an output shaft of the motor (5), the second motor gear (53) and the differential The teeth (18) on the casing (63) are engaged, and the speed ratio of the outer ring gear (72) on the frame (7) to the differential casing (63) is 2: 1.
The power transmission device according to claim 1, wherein a transmission path of the power transmission device is reversible.
The power transmission device according to claim 1, wherein the shaft connected to the second half shaft (62) of the differential (6) is a flexible shaft.
The power transmission device according to any one of claims 4 to 8, wherein the frame (7) is supported on a fixed bracket (8) through a bearing (15).
The power transmission device according to claim 7 or 8, wherein the frame (7) has a cylindrical lower extension (17), and the lower extension (17) extends to the fixed bracket (8) ), The outer ring gear (72) is provided on the lower extension (17).
A wind turbine includes:

Wind leaves (14);

The power transmission device according to any one of the preceding claims, the wind blade (14) is mounted on a horizontal axis (2) of the power transmission device.
The wind turbine according to claim 13, wherein the rotation of the second half shaft (62) of the differential (6) of the power transmission device is continuously transmitted to the vicinity of the ground, and the second half shaft (62) is provided To drive the generator (G) to generate electricity or drive the pump to run.
The wind turbine according to claim 13 or 14, wherein the rotation of the second half shaft (62) about the vertical axis (100) is transmitted via a second spur gear transmission mechanism (11) and a third bevel gear The output of the mechanism (12) is a rotation around a horizontal axis (200) to drive the generator (G) to generate electricity or drive the pump to run.