Secondary planet carrier for offshore wind power

Abstract

The invention discloses a secondary planet carrier for offshore wind power, and relates to the technical field of secondary planet carrier designing and machining, the secondary planet carrier comprises a left side plate and a right side plate, a plurality of connecting plates are fixedly connected between the left side plate and the right side plate, and the connecting plates are distributed between the left side plate and the right side plate at equal intervals; sun wheel shaft holes are formed in the middle of the left side plate and the middle of the right side plate, planet wheel shaft holes are formed in the left side plate and the right side plate, and the planet wheel shaft holes are distributed on the outer rings of the sun wheel shaft holes at equal intervals; a plurality of first drainage holes are formed in the right side plate, and an annular lubricating piece is detachably arranged on the right side plate; lubricating liquid is injected from the first guide groove, the lubricating liquid can pass through the arc-shaped guide groove, then flow to the storage groove and then flow to the first drainage hole through the chamfer, the flowing speed of the lubricating liquid can be reduced to a certain degree, continuous lubrication can be achieved, and the problem that in the prior art, an annular oil groove is formed in the right side plate, and cleaning and maintenance are not easy is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of the design and processing of a secondary planet carrier, and particularly to a secondary planet carrier for an offshore wind turbine. Background Art

[0002] As a clean energy source, wind power generation has been widely used in recent years. In the field of offshore wind power, the gearbox, as a key component of the wind turbine, directly affects the power generation efficiency and reliability. Among them, the secondary planet carrier, as an important part of the gearbox, has an important impact on the overall performance of the gearbox in terms of its design and manufacturing quality.

[0003] The application document with the authorization announcement number CN207406746U proposes a secondary planet carrier: including a left side plate and a right side plate that are parallel to each other, and a plurality of connecting plates. A sun gear shaft hole for installing a transmission shaft is provided in the middle of the left side plate, and a through hole coaxial with the sun gear shaft hole is provided in the middle of the right side plate. The left side plate, the right side plate, and the connecting plates are integrally formed; a plurality of pairs of planet gear shaft holes for installing planet gears are respectively provided at corresponding positions on the left side plate and the right side plate; an annular oil groove is formed on the outer periphery of the through hole inside the right side plate; sound-absorbing grooves are respectively provided on the inner sides of the left side plate and the right side plate; through the integrated design of the left side plate, the right side plate, and the connecting plates, the accuracy of the assembly position of the planet gear shaft is higher, the load sharing performance and the load-bearing capacity of the planet carrier are better, and at the same time, the strength and service life of the device are greatly improved; the annular oil groove can make the lubrication of the sun gear and the planet gears more sufficient and uniform, and the sound-absorbing grooves can reduce the noise generated by the rotation of the sun gear and the planet gears.

[0004] However, there are still deficiencies in the prior art:

[0005] 1. The annular oil groove is opened inside the right side plate, which is not easy to clean and maintain.

[0006] 2. A sound-absorbing groove is opened on the outer ring of the planet gear shaft hole, and an annular oil groove is connected and arranged on the inner ring, which will weaken the material strength near the planet gear shaft hole, thereby affecting the load-bearing capacity of the planet gear. Summary of the Invention

[0007] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention provides a secondary planet carrier for an offshore wind turbine, which solves the problem that in the prior art, the annular oil groove is opened inside the right side plate and is not easy to clean and maintain.

[0008] To achieve the above object, the present invention provides a secondary planet carrier for offshore wind power, which includes a left side plate and a right side plate. A connecting plate is fixedly connected between the left side plate and the right side plate. There are several connecting plates, which are equidistantly distributed between the left side plate and the right side plate. Sun gear shaft holes are opened in the middle of both the left side plate and the right side plate. Planet gear shaft holes are opened on the left side plate and the right side plate, and the planet gear shaft holes are equidistantly distributed on the outer circle of the sun gear shaft holes; Several first drainage holes are provided on the right side plate, and an annular lubricating member is detachably provided on the right side plate;

[0009] The annular lubricating member includes an annular plate. A through groove is opened in the annular plate. Several arc-shaped grooves are equidistantly opened on the annular plate. The arc-shaped grooves are concentric with the planet gear shaft holes and have the same number. A first guiding groove is opened on the annular plate. Several second drainage holes are opened at the lower end of the annular plate. The second drainage holes correspond to the first drainage holes one by one. An arc-shaped guiding groove is provided between the second drainage holes and the first guiding groove, that is, the arc-shaped guiding groove connects the first guiding groove and the second drainage holes. A storage groove is opened in the second drainage hole. The diameter of the storage groove is larger than that of the second drainage hole. The storage groove communicates with the arc-shaped guiding groove. A chamfer is opened at the lower end of the second drainage hole.

[0010] As a further scheme of the present invention: The cross-sections of the left side plate and the right side plate are circular, and the cross-section of the connecting plate is an equilateral trapezoid.

[0011] As a further scheme of the present invention: The left side plate, the right side plate, and the connecting plate are integrally formed by welding.

[0012] As a further scheme of the present invention: Sound insulation grooves are penetrated on the connecting plate, and sound insulation strips are clamped in the sound insulation grooves.

[0013] As a further scheme of the present invention: The sound insulation grooves are arranged along the trapezoidal width direction of the cross-section of the connecting plate.

[0014] As a further scheme of the present invention: A bearing block is fixedly installed on the left side plate, and the bearing block is concentric with the left side plate and the right side plate.

[0015] As a further scheme of the present invention: A sun gear shaft hole is opened on the bearing block, and an internal gear is fixedly arranged on the inner side wall of the bearing block.

[0016] As a further scheme of the present invention: The planet gear shaft holes are arranged between adjacent connecting plates, and the first drainage holes are arranged between the planet gear shaft holes.

[0017] As a further scheme of the present invention: Several installation grooves are equidistantly arranged on the right side plate, and several first threaded grooves are opened in the installation grooves.

[0018] As a further solution of the present invention: a plurality of limiting plates are fixedly installed on the side of the annular plate, the limiting plates correspond to the installation grooves, a plurality of second threaded holes are opened on the limiting plates, the second threaded holes correspond to the first threaded grooves, and bolts are arranged in the first threaded grooves and the second threaded holes with internal threads.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. By providing an annular lubricating member, the annular lubricating member is detachably arranged on the right side plate. Specifically, by opening a plurality of first threaded grooves on the right side plate, a limiting plate is fixedly installed on the outer ring of the annular lubricating member, the limiting plate corresponds to the installation groove, a plurality of second threaded holes are opened on the limiting plate, the second threaded holes correspond to the first threaded grooves, and by tightening bolts in the first threaded grooves and the second threaded holes, the fixed connection of the annular lubricating member on the right side plate can be realized, which is convenient for the installation and disassembly of the annular lubricating member and does not affect the overall strength of the device.

[0021] 2. The annular lubricating member includes an annular plate, a through groove is opened in the annular plate, the through groove matches the outer ring of the bearing block, six arc grooves are equidistantly opened on the annular plate, the arc grooves are concentric with the planetary gear shaft holes. By providing the arc grooves, the installation of the annular lubricating member will not interfere with the operation of the planetary gears between the left side plate and the right side plate; a first guiding groove is opened on the annular plate, six second drainage holes are opened at the lower end of the annular plate, the second drainage holes correspond to the first drainage holes and have the same diameter, an arc guiding groove is arranged between the second drainage holes and the first guiding groove, a storage groove is opened in the second drainage hole, the diameter of the storage groove is larger than that of the second drainage hole, the storage groove communicates with the arc guiding groove, and a chamfer is opened at the lower end of the second drainage hole, so that when lubricating liquid is injected from the first guiding groove, the lubricating liquid can flow to the first drainage hole through the guiding of the arc guiding groove and the second drainage hole, and flow to the meshing part of the planetary gear and the sun gear through the first drainage hole. Among them, the lubricating liquid flowing through the arc guiding groove will first flow to the storage groove and then flow to the first drainage hole through the chamfer, which can slow down the flow rate of the lubricating liquid to a certain extent, so as to continuously lubricate.

[0022] 3. By integrally welding the left side plate, the right side plate and the connecting plate, the cross-section of the connecting plate is an equilateral trapezoid, and the shorter bottom edge of the trapezoid faces inward; the overall stiffness of the device can be increased; a sound insulation groove is penetrated through the connecting plate, the sound insulation groove is arranged along the width direction of the trapezoid of the cross-section of the connecting plate, and a sound insulation strip is clamped in the sound insulation groove; while ensuring the noise reduction effect, the influence on the overall structural strength of the connecting plate can be reduced. Description of the Drawings

[0023] Figure 1 For the three-dimensional structure of the present invention Figure 1 ;

[0024] Figure 2 is the three-dimensional structure of the present invention Figure 2 ;

[0025] Figure 3 is of the present invention Figure 1 structural schematic diagram after removing the annular lubricating part;

[0026] Figure 4 is of the present invention Figure 3 enlarged view at position A;

[0027] Figure 5 is the structural schematic diagram of the annular lubricating part of the present invention;

[0028] Figure 6 is the cross-sectional view of the annular lubricating part of the present invention;

[0029] Figure 7 is of the present invention Figure 6 enlarged view at position A.

[0030] In the figure: 1, left side plate; 2, right side plate; 3, connecting plate; 4, bearing block; 5, internal gear; 6, planetary gear shaft hole; 7, sun gear shaft hole; 8, first drainage hole; 9, installation groove; 10, first thread groove; 11, sound insulation strip; 12, sound insulation groove; 13, annular lubricating part; 14, annular plate; 15, through groove; 16, first guiding groove; 17, arc groove; 18, limiting plate; 19, second threaded hole; 20, second drainage hole; 21, arc guiding groove; 22, storage groove; 23, chamfer. Specific Embodiments

[0031] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0032] As Figures 1-7 shown, a two-stage planetary carrier for offshore wind power includes a left side plate 1 and a right side plate 2. A connecting plate 3 is fixedly connected between the left side plate 1 and the right side plate 2. The cross-sections of the left side plate 1 and the right side plate 2 are circular, and the cross-section of the connecting plate 3 is an equilateral trapezoid, and the shorter base of the trapezoid faces inward; the left side plate 1, the right side plate 2, and the connecting plate 3 are integrally formed by welding to increase the overall strength and load-bearing capacity of the device; the left side plate 1, the right side plate 2, and the connecting plate 3 are made of materials with high strength and low density, such as titanium alloy or high-strength alloy steel, which can further reduce the weight and energy consumption while ensuring the performance of the planetary carrier;

[0033] As an implementation mode in this embodiment, a plurality of connecting plates 3 are provided. In this embodiment, according to the number of planetary gears to be installed, the connecting plates 3 are set to six. The six connecting plates 3 are evenly distributed between the left plate 1 and the right plate 2. The left plate 1, the right plate 2 and the connecting plates 3 together enclose a hollow platform matrix, and the hollow platform matrix is used to arrange the sun gear and the planetary gear; A sound insulation groove 12 is penetrated through the connecting plate 3, and a sound insulation strip 11 is clamped in the sound insulation groove 12; The sound insulation groove 12 is arranged along the trapezoidal width direction of the section of the connecting plate 3. If the sound insulation groove is set as a ring and opened on the side plate or the connecting plate 3, it is easy to affect the overall hardness, thus affecting the overall bearing capacity of the device. By penetrating the sound insulation groove 12 through the connecting plate 3 and clamping the sound insulation strip 11 in the sound insulation groove 12, while ensuring the noise reduction effect, the influence on the overall structural strength of the connecting plate 3 can be reduced; In specific implementation, the material of the sound insulation strip can be rubber or nylon material;

[0034] Both the left side plate 1 and the right side plate 2 are provided with sun gear shaft holes 7 in the middle, and the sun gear shaft holes 7 are used for the subsequent installation of the sun gear shaft; a bearing block 4 is fixedly installed on the left side plate 1, and the bearing block 4 is concentric with the left side plate 1 and the right side plate 2. The bearing block 4 is provided with a sun gear shaft hole 7, and an internal gear 5 is fixedly arranged on the inner side wall of the bearing block 4, which is convenient for meshing with the coaxial gear on the sun gear shaft during installation to realize power transmission and speed and torque adjustment; the left side plate 1 and the right side plate 2 are provided with planetary gear shaft holes 6, and there are six planetary gear shaft holes 6, which are equidistantly distributed on the outer circle of the sun gear shaft hole 7; the planetary gear shaft holes 6 are arranged between adjacent connecting plates 3; the sun gear shaft hole 7 is used for installing the planetary gear shaft, and the right side plate 2 is provided with a number of first drainage holes 8, and the first drainage holes 8 are arranged between the planetary gear shaft holes 6, that is, there are six first drainage holes 8, which are equidistantly arranged on the right side plate 2. The first drainage holes 8 are used to transfer lubricating fluid to lubricate the planetary gears and sun gears between the left side plate 1 and the right side plate 2. A ring-shaped lubricating member 13 is detachably arranged on the right side plate 2, and the ring-shaped lubricating member 13 is used for storing and dispersing lubricating fluid. Six mounting grooves 9 are equidistantly arranged on the right side plate 2, and a number of first threaded grooves 10 are opened in the mounting grooves 9. The ring-shaped lubricating member 13 includes a ring plate 14, and a through groove 15 is opened in the ring plate 14. The through groove 15 matches the outer circle of the bearing block 4. Six arc grooves 17 are equidistantly opened on the ring plate 14, and the arc grooves 17 are concentric with the planetary gear shaft holes 6. By setting the arc grooves 17, the installation of the ring-shaped lubricating member 13 will not interfere with the operation of the planetary gears between the left side plate 1 and the right side plate 2; a first guiding groove 16 is opened on the ring plate 14, and six second drainage holes 20 are opened at the lower end of the ring plate 14. The second drainage holes 20 correspond to the first drainage holes 8 and have the same diameter. An arc-shaped guiding groove 21 is arranged between the second drainage holes 20 and the first guiding groove 16, that is, the arc-shaped guiding groove 21 connects the first guiding groove 16 and the second drainage holes 20. When lubricating fluid is injected from the first guiding groove 16, the lubricating fluid can flow to the first drainage holes 8 through the guiding of the arc-shaped guiding groove 21 and the second drainage holes 20, and flow to the meshing part of the planetary gears and sun gears through the first drainage holes 8. A storage groove 22 is opened in the second drainage holes 20, and the diameter of the storage groove 22 is larger than that of the second drainage holes 20. The storage groove 22 is connected to the arc-shaped guiding groove 21. A chamfer 23 is opened at the lower end of the second drainage holes 20. The lubricating fluid flowing through the arc-shaped guiding groove 21 will first flow into the storage groove 22 and then flow to the first drainage holes 8 through the chamfer 23, which can slow down the flow rate of the lubricating fluid to a certain extent, so as to continuously lubricate. Six limiting plates 18 are fixedly installed on the side of the ring plate 14, and the limiting plates 18 correspond to the mounting grooves 9. A number of second threaded holes 19 are opened on the limiting plates 18, and the second threaded holes 19 correspond to the first threaded grooves 10. Bolts are threadedly arranged in the first threaded grooves 10 and the second threaded holes 19. By tightening the bolts, the fixed connection of the ring-shaped lubricating member 13 on the right side plate 2 can be realized, which is convenient for the installation and disassembly of the ring-shaped lubricating member 13 without affecting the overall strength of the device.

[0035] Working principle:

[0036] Install the planet gear and the sun gear in the planet gear shaft hole 6 and the sun gear shaft hole 7 of the device respectively. Then, fixedly install the annular lubricating part 13 on the right side plate 2, and install the sound insulation strip 11 in the sound insulation groove 12. Next, install the device in the wind turbine. By injecting lubricating fluid into the annular lubricating part 13, the lubricating fluid is injected from the first guiding groove 16. Through the guiding of the arc-shaped guiding groove 21 and the second drainage hole 20, it first flows to the storage tank 22, and then flows to the first drainage hole 8 through the chamfer 23. It flows to the meshing part of the planet gear and the sun gear through the first drainage hole 8. The lubricating fluid can be added as needed during use.

[0037] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, terms such as "install", "connect", and "couple" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0038] The above has described a specific embodiment of the present invention in detail, but the described content is only a preferred embodiment of the present invention and cannot be considered as limiting the scope of implementation of the present invention. Any equivalent changes and improvements made according to the scope of the application of the present invention should still fall within the scope covered by the patent of the present invention.

Claims

1. A two-stage planetary carrier for offshore wind power, characterized in that: The invention comprises a left side plate (1) and a right side plate (2), wherein a connecting plate (3) is fixedly connected between the left side plate (1) and the right side plate (2), and a plurality of connecting plates (3) are provided, and the connecting plates (3) are evenly distributed between the left side plate (1) and the right side plate (2); a sun gear shaft hole (7) is provided in the middle of the left side plate (1) and the right side plate (2); planetary gear shaft holes (6) are provided on the left side plate (1) and the right side plate (2), and the planetary gear shaft holes (6) are evenly distributed on the outer ring of the sun gear shaft hole (7); a plurality of first drainage holes (8) are provided on the right side plate (2), and a removable annular lubricating member (13) is provided on the right side plate (2); The annular lubricating member (13) comprises an annular plate (14), a through groove (15) is provided in the annular plate (14), a plurality of arc grooves (17) are provided on the annular plate (14) at equal intervals, a first guide groove (16) is provided on the annular plate (14), a plurality of second drainage holes (20) are provided at the lower end of the annular plate (14), and an arc guide groove (21) is provided between the second drainage hole (20) and the first guide groove (16).

2. A secondary planetary carrier for offshore wind power according to claim 1, characterized in that: The second drainage hole (20) corresponds to the first drainage hole (8) one by one, the arc groove (17) is concentric with the planetary gear shaft hole (6) and the number is equal, the annular lubricating part also includes a storage groove (22), a storage groove (22) is provided in the second drainage hole (20), the diameter of the storage groove (22) is larger than that of the second drainage hole (20), the storage groove (22) is connected to the arc guide groove (21), and a chamfer (23) is provided at the lower end of the second drainage hole (20).

3. The secondary planetary carrier for offshore wind power according to claim 1, characterized in that: The cross-sections of the left side plate (1) and the right side plate (2) are circular, the cross-section of the connecting plate (3) is an equilateral trapezoid, and the left side plate (1), the right side plate (2) and the connecting plate (3) are integrated by welding.

4. A two-stage planetary carrier for offshore wind power according to claim 2, characterized in that: The connection plate (3) is provided with a sound insulation groove (12) penetrating therethrough, and a sound insulation strip (11) is clamped in the sound insulation groove (12).

5. A two-stage planetary carrier for offshore wind power according to claim 4, characterized in that: The sound insulation groove (12) is arranged along the width direction of the trapezoidal section of the connecting plate (3).

6. The secondary planetary carrier for offshore wind power according to claim 1, characterized in that: A bearing block (4) is fixedly mounted on the left side plate (1), and the bearing block (4) is concentric with the left side plate (1) and the right side plate (2).

7. A two-stage planetary carrier for offshore wind power according to claim 6, characterized in that: The bearing block (4) is provided with a sun gear shaft hole (7), and an internal gear (5) is fixedly arranged on the inner side wall of the bearing block (4).

8. The two-stage planetary carrier for offshore wind power according to claim 1, characterized in that: The planetary wheel shaft holes (6) are arranged between adjacent connecting plates (3), and the first drainage holes (8) are arranged between the planetary wheel shaft holes (6).

9. The secondary planetary carrier for offshore wind power according to claim 1, characterized in that: A plurality of installation grooves (9) are equidistantly arranged on the right side plate (2), and a plurality of first thread grooves (10) are provided in the installation grooves (9).

10. A two-stage planetary carrier for offshore wind power according to claim 9, characterized in that: A plurality of limiting plates (18) are fixedly mounted on the side of the annular plate (14), the limiting plates (18) corresponding to the mounting grooves (9), a plurality of second threaded holes (19) are formed on the limiting plates (18), the second threaded holes (19) corresponding to the first threaded grooves (10), and bolts are provided in the internal threads of the first threaded grooves (10) and the second threaded holes (19).

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