Asymmetric balance design method and structure for planet package of wind power gear box

Abstract

The invention discloses an asymmetric balance design method and structure for a wind power gear box planet package, and the method comprises the steps: enabling a supporting stand column and a planet gear installation shaft to be circumferentially and uniformly distributed; one planetary gear mounting shaft serves as the last planetary gear mounting shaft, so that the shapes of the two side faces of each supporting stand column in the two supporting stand columns on the two sides of the position of the last planetary gear mounting shaft are asymmetrically arranged, the two supporting stand columns on the two sides are symmetrically arranged, and the shapes of the two side faces of the other supporting stand columns are symmetrically arranged; blind holes are formed in the middles of the top ends of the supporting columns with asymmetric shapes on the two sides, and through holes are formed in the middles of the top ends of the other supporting columns; the last planetary gear mounting shaft is arranged to be a solid shaft, and the other planetary gear mounting shafts are arranged to be hollow shafts. The whole structure is simple, the balance of the planet carrier effectively meets the requirement, and the running stability of the whole machine is effectively guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of wind power gearboxes, and in particular relates to an asymmetric balance design method and structure for a planetary package of a wind power gearbox. Background Art

[0002] The gearbox in a wind turbine generator is an important mechanical component. Its main function is to transmit the power generated by the wind rotor under the action of wind to the generator and make it obtain the corresponding speed. The supporting columns of the planetary frame of the wind turbine gearbox usually adopt a circularly symmetrical structure, and the column surface adopts an arc or plane structure. With the increase of the torque of the large-megawatt wind turbine gearbox, the diameter of the planetary gear increases, and the supporting columns with arc surfaces gradually appear, causing the last planetary gear to be unable to be installed, or the finite element analysis strength of the flat supporting columns is insufficient. Gradually, arc columns and flat columns are used at the same time, but this will make the stiffness of the planetary frame inconsistent in the circumferential direction, and the deflection angles of the side plates at both ends of each planetary gear mounting shaft hole are different, resulting in inconsistent contact of each planetary gear after the planetary gear is installed, and poor balance, resulting in instability of the planetary package when the whole machine is running. Summary of the invention

[0003] In order to at least partially solve the technical problems existing in the above-mentioned prior art, the present invention provides an asymmetric balance design method and structure for a planetary package of a wind turbine gearbox.

[0004] The asymmetric balance design method of the planetary package of the wind power gearbox of the present invention comprises:

[0005] Make the supporting columns and the planetary gear mounting shafts evenly distributed around the circumference;

[0006] One of the planetary gear mounting shafts is used as the last planetary gear mounting shaft, so that the two side surfaces of each of the two supporting columns on both sides of the last planetary gear mounting shaft are asymmetrically arranged, and the two supporting columns on both sides are symmetrically arranged, and the two side surfaces of the remaining supporting columns are symmetrically arranged;

[0007] A blind hole is provided in the middle of the top of the asymmetrical support columns on both sides, and a through hole is provided in the middle of the top of the remaining support columns;

[0008] The last planetary gear mounting shaft is configured as a solid shaft, and the remaining planetary gear mounting shafts are configured as hollow shafts.

[0009] Furthermore, in the above-mentioned asymmetric balance design method of the wind turbine gearbox planetary package, among the two supporting columns on both sides of the last planetary gear mounting shaft position, the left side surface of the right supporting column is an arc shape, and the right side surface is a plane shape, the left side surface of the left supporting column is a plane shape, and the right side surface is an arc shape, and the side surfaces of the remaining supporting columns are all arc shapes.

[0010] Furthermore, in the above-mentioned asymmetric balance design method for the planetary package of the wind power gearbox, the through hole is a triangular through hole, the blind hole is a triangular hole, and the depth of the blind hole is adjusted according to the balance of the planetary carrier so that the balance of the planetary carrier is within the required range.

[0011] The asymmetric balance structure of the wind turbine gearbox planetary package of the present invention includes a planetary frame plate, support columns and a planetary gear mounting shaft. The support columns are evenly arranged around the outside of the planetary frame plates, and the planetary gear mounting shaft is arranged between every two of the support columns and fixed to the planetary frame plates.

[0012] Furthermore, in the above-mentioned asymmetric balance structure of the wind turbine gearbox planetary package, one of the planetary gear mounting shafts is the last planetary gear mounting shaft, and blind holes are provided at the middle parts of the top ends of the support columns on both sides of the last planetary gear mounting shaft through the planetary frame plate, and through holes are provided at the middle parts of the top ends of the remaining support columns through the planetary frame plate.

[0013] Furthermore, in the above-mentioned asymmetric balance structure of the wind turbine gearbox planetary package, the left side surface of the support column on the right side of the last planetary gear installation shaft is in an arc shape, and the right side surface is in a plane shape. The left side surface of the support column on the left side of the last planetary gear installation shaft is in a plane shape, and the right side surface is in an arc shape. The side surfaces of the remaining support columns are all in an arc shape.

[0014] Furthermore, in the above-mentioned asymmetric balance structure of the planetary package of the wind power gearbox, the through hole and the blind hole are both triangular in shape, and the depth of the blind hole can be adjusted according to the balance amount of the planetary carrier.

[0015] Furthermore, in the above-mentioned asymmetric balance structure of the planetary package of the wind power gearbox, among the planetary gear mounting shafts, the last planetary gear mounting shaft is a solid shaft, and the remaining planetary gear mounting shafts are hollow shafts.

[0016] The asymmetric balance design method and structure of the wind turbine gearbox planetary package of the present invention have the following advantages and beneficial effects:

[0017] The overall structure of the present invention is simple, and the balance of the planetary frame can be effectively satisfied. The rigidity of each supporting column of the planetary package in the circumferential direction is consistent, and the deflection angles of the side plates at both ends are consistent, so that the contact of each planetary gear is consistent, thereby effectively ensuring the stability of the whole machine operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings in the following descriptions are only used to further understand the embodiments of the present invention and constitute a part of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the asymmetric balance structure of the planetary package of the wind power gearbox in the embodiment;

[0020] Figure 2 It is the front view of the asymmetric balance structure of the planetary package of the wind power gearbox in the embodiment.

[0021] Description of reference numerals:

[0022] 1: first supporting column, 2: second supporting column, 3: third supporting column, 4: fourth supporting column, 5: fifth supporting column, 6: sixth supporting column, 7: seventh supporting column;

[0023] 1-2: first planetary gear mounting shaft, 2-3: second planetary gear mounting shaft, 3-4: third planetary gear mounting shaft, 4-5: fourth planetary gear mounting shaft, 5-6: fifth planetary gear mounting shaft, 6-7: sixth planetary gear mounting shaft, 7-8: seventh planetary gear mounting shaft;

[0024] 1-1: first through hole, 2-1: second through hole, 3-1: third through hole, 4-1: fourth through hole, 7-1: fifth through hole; 5-1: first blind hole, 6-1: second blind hole. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0026] The asymmetric balance design method of the planetary package of the wind power gearbox of the present invention comprises:

[0027] Make the supporting columns and the planetary gear mounting shafts evenly distributed around the circumference;

[0028] One of the planetary gear mounting shafts is used as the last planetary gear mounting shaft, so that the two side surfaces of each of the two supporting columns on both sides of the last planetary gear mounting shaft are asymmetrically arranged, and the two supporting columns on both sides are symmetrically arranged, and the two side surfaces of the remaining supporting columns are symmetrically arranged;

[0029] A blind hole is provided in the middle of the top of the asymmetrical support columns on both sides, and a through hole is provided in the middle of the top of the remaining support columns;

[0030] The last planetary gear mounting shaft is configured as a solid shaft, and the remaining planetary gear mounting shafts are configured as hollow shafts.

[0031] Furthermore, in the asymmetric balance design method of the wind turbine gearbox planetary package of the present invention, among the two supporting columns on both sides of the last planetary gear mounting shaft position, the left side surface of the right supporting column is an arc shape, and the right side surface is a plane shape, the left side surface of the left supporting column is a plane shape, and the right side surface is an arc shape, and the side surfaces of the remaining supporting columns are all arc shapes.

[0032] Furthermore, in the asymmetric balance design method of the wind turbine gearbox planetary package of the present invention, the through hole is a triangular through hole, the blind hole is a triangular hole, and the depth of the blind hole is adjusted according to the balance of the planetary carrier so that the balance of the planetary carrier is within the required range.

[0033] The asymmetric balance structure of the wind turbine gearbox planetary package of the present invention comprises a planetary frame plate, support columns and a planetary gear mounting shaft. The support columns are evenly arranged around the outside between the planetary frame plates, and the planetary gear mounting shaft is arranged between every two support columns and fixed to the planetary frame plate.

[0034] Furthermore, in the asymmetric balancing structure of the wind turbine gearbox planetary package of the present invention, one of the planetary gear mounting shafts is the last planetary gear mounting shaft, and blind holes are provided in the middle of the top ends of the supporting columns on both sides of the last planetary gear mounting shaft through the planetary frame plate, and through holes are provided in the middle of the top ends of the remaining supporting columns through the planetary frame plate.

[0035] Furthermore, in the asymmetric balance structure of the planetary package of the wind turbine gearbox of the present invention, the left side surface of the support column on the right side of the last planetary gear installation shaft is in an arc shape, and the right side surface is in a plane shape. The left side surface of the support column on the left side of the last planetary gear installation shaft is in a plane shape, and the right side surface is in an arc shape. The side surfaces of the remaining support columns are all in an arc shape, thereby effectively ensuring that the last planetary gear can be installed, and at the same time making the rigidity of each support column in the circumferential direction consistent.

[0036] Furthermore, in the asymmetric balancing structure of the wind turbine gearbox planetary package of the present invention, the through holes and the blind holes are both triangular, and the depth of the blind holes can be adjusted according to the balance of the planetary frame, thereby effectively ensuring that the balance of the planetary frame is within the required level range and improving the balance of the planetary frame during operation.

[0037] Furthermore, in the asymmetric balance structure of the wind turbine gearbox planetary package of the present invention, among the planetary gear mounting shafts, the last planetary gear mounting shaft is a solid shaft, and the remaining planetary gear mounting shafts are hollow shafts, thereby effectively improving the torsional stiffness of the supporting column and ensuring that the deflection angles on both sides of the planetary frame plate are consistent.

[0038] Example:

[0039] like Figure 1-Figure 2 As shown, a first supporting column 1, a second supporting column 2, a third supporting column 3, a fourth supporting column 4, a fifth supporting column 5, a sixth supporting column 6 and a seventh supporting column 7 are provided, and a first planetary gear mounting shaft 1-2, a second planetary gear mounting shaft 2-3, a third planetary gear mounting shaft 3-4, a fourth planetary gear mounting shaft 4-5, a fifth planetary gear mounting shaft 5-6, a sixth planetary gear mounting shaft 6-7 and a seventh planetary gear mounting shaft 7-8 are respectively provided in sequence between the first supporting column 1 and the second supporting column 2, between the second supporting column 2 and the third supporting column 3, between the third supporting column 3 and the fourth supporting column 4, between the fourth supporting column 4 and the fifth supporting column 5, between the fifth supporting column 5 and the sixth supporting column 6, between the sixth supporting column 6 and the seventh supporting column 7, between the seventh supporting column 7 and the first supporting column 1, and the fifth planetary gear mounting shaft 5-6 is taken as the last planetary gear mounting shaft position, so that the center line of the fifth planetary gear mounting shaft 5-6 coincides with the center line of the planetary plate;

[0040] The first support column 1, the second support column 2, the third support column 3, the fourth support column 4 and the seventh support column 7 are all set to have arc shapes on both sides, the left side of the fifth support column 5 is an arc shape, and the right side is a plane shape, and the left side of the sixth support column 6 is a plane shape, and the right side is an arc shape;

[0041] A triangular first through hole 1-1, a second through hole 2-1, a third through hole 3-1, a fourth through hole 4-1, and a fifth through hole 7-1 are arranged between the first supporting column 1, the second supporting column 2, the third supporting column 3, the fourth supporting column 4, and the seventh supporting column 7. A triangular first blind hole 5-1 and a second blind hole 6-1 are arranged between the fifth supporting column 5 and the sixth supporting column 6. By changing the depth of the first blind hole 5-1 and the second blind hole 6-1, the balance amount of the planet carrier is within the required level range.

[0042] The first planetary gear mounting shaft 1-2, the second planetary gear mounting shaft 2-3, the third planetary gear mounting shaft 3-4, the fourth planetary gear mounting shaft 4-5, the sixth planetary gear mounting shaft 6-7 and the seventh planetary gear mounting shaft 7-8 are set as hollow shafts, and the fifth planetary gear mounting shaft 5-6 is set as a solid shaft. By changing the inner hole structure of the fifth planetary gear mounting shaft 5-6, the torsional stiffness of the fifth support column 5 and the sixth support column 6 is improved, so that the torsional angles of the front side plate of the planetary carrier plate of each planetary gear mounting shaft hole and the rear side plate of the planetary carrier plate are consistent after the planetary package is subjected to force, thereby improving the stability and balance of the planetary package during operation.

[0043] To sum up, compared with the prior art, the asymmetric balancing design method and structure of the wind turbine gearbox planetary package of the present invention has the following advantages and beneficial effects: the overall structure of the present invention is simple, which effectively makes the balance of the planetary frame meet the requirements, the circumferential rigidity of each supporting column of the planetary package is consistent, and the deflection angles of the side plates at both ends are consistent, so that the contact of each planetary wheel is consistent, thereby effectively ensuring the stability of the operation of the whole machine.

[0044] It should be noted that, in this article, unless otherwise clearly specified and limited, the term "connection" or its synonyms should be understood in a broad sense. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. Moreover, expressions such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. At the same time, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such a process, method, article or device. In addition, "front", "back", "left", "right", "upper" and "lower" in this article are all referenced to the placement state shown in the accompanying drawings.

[0045] 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 it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wind turbine gearbox planetary package asymmetric balance design method, characterized in that: The asymmetric balance design method of the wind power gearbox planetary package comprises: Make the supporting columns and the planetary gear mounting shafts evenly distributed around the circumference; One of the planetary gear mounting shafts is used as the last planetary gear mounting shaft, so that the two side surfaces of each of the two supporting columns on both sides of the last planetary gear mounting shaft are asymmetrically arranged, and the two supporting columns on both sides are symmetrically arranged, and the two side surfaces of the remaining supporting columns are symmetrically arranged; A blind hole is provided in the middle of the top of the asymmetrical support columns on both sides, and a through hole is provided in the middle of the top of the remaining support columns; The last planetary gear mounting shaft is configured as a solid shaft, and the remaining planetary gear mounting shafts are configured as hollow shafts.

2. The asymmetric balance design method for a planetary package of a wind turbine gearbox according to claim 1 is characterized in that: Of the two supporting columns on both sides of the last planetary gear mounting shaft position, the left side of the right supporting column is an arc shape and the right side is a plane shape, the left side of the left supporting column is a plane shape and the right side is an arc shape, and the side surfaces of the remaining supporting columns are all arc shapes.

3. The asymmetric balance design method for a planetary package of a wind turbine gearbox according to claim 1 is characterized in that: The through hole is a triangular through hole, the blind hole is a triangular hole, and the depth of the blind hole is adjusted according to the balance amount of the planet carrier so that the balance amount of the planet carrier is within the required range.

4. An asymmetric balance structure of a wind turbine gearbox planetary package designed by using the asymmetric balance design method of a wind turbine gearbox planetary package according to any one of claims 1 to 3, characterized in that: The asymmetric balance structure of the wind turbine gearbox planetary package includes a planetary frame plate, support columns and a planetary gear mounting shaft. The support columns are evenly arranged around the outside of the planetary frame plates, and the planetary gear mounting shaft is arranged between every two of the support columns and fixed to the planetary frame plates.

5. The asymmetric balance structure of the wind turbine gearbox planetary package according to claim 4 is characterized in that: One of the planetary gear mounting shafts is the last planetary gear mounting shaft, and blind holes are provided at the middle parts of the top ends of the support columns on both sides of the last planetary gear mounting shaft, passing through the planetary frame plate, and through holes are provided at the middle parts of the top ends of the other support columns, passing through the planetary frame plate.

6. The asymmetric balance structure of the wind turbine gearbox planetary package according to claim 5 is characterized in that: The left side surface of the support column on the right side of the last planetary gear installation shaft is in an arc shape, and the right side surface is in a plane shape. The left side surface of the support column on the left side of the last planetary gear installation shaft is in a plane shape, and the right side surface is in an arc shape. The side surfaces of the remaining support columns are all in an arc shape.

7. The asymmetric balance structure of the wind turbine gearbox planetary package according to claim 5 is characterized in that: The through hole and the blind hole are both triangular in shape, and the depth of the blind hole can be adjusted according to the balance amount of the planet carrier.

8. The asymmetric balance structure of the wind turbine gearbox planetary package according to claim 5 is characterized in that: Among the planetary gear installation shafts, the last planetary gear installation shaft is a solid shaft, and the remaining planetary gear installation shafts are hollow shafts.

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