CN110686071A - A planet carrier support structure and gear box - Google Patents

Abstract

The invention discloses a planet carrier support structure and a gear box, which belong to the technical field of mechanical transmission. The planet carrier comprises a main body part, a first connecting part arranged at one end of the main body part, and a first connecting part arranged at the other end of the main body part. Two connecting parts, the outer diameter of the first connecting part is larger than the outer diameter of the second connecting part; the planet carrier support structure includes a casing, a transparent cover and a pair of bearings, and the casing surrounds the outer diameter of the planet carrier a radial outer side; a transparent cover is sleeved on the first connecting part and is fixedly connected with the casing; a pair of bearings are arranged on the second connecting part and are located on the inner side of the casing. The gearbox includes the planet carrier support structure as described above. By arranging a pair of bearings on the second connecting part of the planet carrier, the axial dimension of the bearing is reduced, and a bearing seat is omitted, thereby reducing the weight and volume, reducing the production cost, and making the structure compact and easy to install. convenient.

Description

A planet carrier support structure and gear box

technical field

The invention relates to the technical field of mechanical transmission, in particular to a planet carrier support structure and a gear box.

Background technique

As a kind of renewable energy, wind power has strong advantages for power generation. Compared with thermal power, solar power, water power and other energy power generation, it has the advantages of low construction cost, small footprint, and convenient maintenance. In the wind turbine, the gearbox is the key component of the wind turbine. With the rapid development of the wind power industry, high-power wind turbines are more and more popular.

The gear box of the existing high-power wind turbine generally adopts the structure of a two-stage planetary gear train and a parallel speed-increasing stage at the last stage. The volumes are very large. In the existing traditional structure, as shown in FIG. 1 , a bearing 20 is provided at the left and right ends of the planet carrier 10 to support the planet carrier 10 . In this way, two bearing seats need to be provided on the box body 30 , and Since the shaft diameter of the left end of the planet carrier 10 is relatively large, the required size of the bearing 20 is also very large, which needs to be specially customized, the cost is very high, and it also occupies a large space.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a planet carrier support structure and a gear box, so as to solve the technical problems of large space occupation, heavy weight and high cost of the planet carrier and the bearing in the prior art.

As conceived above, the technical scheme adopted in the present invention is:

A planet carrier support structure, the planet carrier comprises a main body part, a first connection part arranged at one end of the main body part and a second connection part arranged at the other end of the main body part, the outer diameter of the first connection part is larger than the outer diameter of the second connecting portion; the planet carrier support structure includes:

a casing surrounding the radial outer side of the planet carrier;

a transparent cover sleeved on the first connecting part and fixedly connected with the casing;

A pair of bearings are arranged on the second connecting part and located inside the housing.

Wherein, the inner side of the housing is provided with a flange, the second connecting part is provided with a protrusion, the outer ring of the bearing located on the inner side is in contact with the flange, and the inner ring of the bearing located on the inner side is in contact with the flange. The ring is in abutment with the protrusion.

Wherein, it also includes a first limit plate and a second limit plate, the first limit plate is connected with the housing and abuts with the outer ring of the bearing located on the outside, the second limit plate It is connected to the second connection portion and is in contact with the inner ring of the bearing located on the outer side.

Wherein, a spacer ring is also included, and the spacer ring is located between the two bearings and abuts with the outer ring of the bearing.

Wherein, a spacer ring is also included, and the spacer ring is located between the two bearings and abuts against the inner ring of the bearing.

Wherein, the casing includes an upper casing and a lower casing, the upper casing surrounds the radial outer side of the first connecting portion, and the lower casing surrounds the radial outer side of the second connecting portion and cooperate with the bearing.

Wherein, the transparent cover is fixedly connected with the upper casing and is sealed with the first connecting portion.

Wherein, the transparent cover is provided with a plurality of sealing cavities from the outer side to the inner side, each of the sealing chambers is provided with a sealing ring, and a groove is provided on the first connecting part at a position corresponding to the sealing ring , the sealing ring is clamped in the groove.

Wherein, it also includes a sealing plate, the sealing plate is sleeved on the first connection part and connected with the outer side of the transparent cover.

A gear box includes the planet carrier support structure as described above.

Beneficial effects of the present invention:

The planet carrier support structure proposed by the present invention is surrounded by the shell on the radial outer side of the planet carrier, the through cover supports the first connecting portion of the planet carrier, and the bearing supports the second connecting portion of the planet carrier; The outer diameter of the first connecting part is larger than the outer diameter of the second connecting part. By arranging a pair of bearings on the second connecting part of the planet carrier, the axial dimension of the bearing is reduced, and a bearing seat is omitted, thereby reducing the size of the bearing. The weight and volume are reduced, the production cost is reduced, and the structure is compact and the installation is convenient.

Description of drawings

1 is a cross-sectional view of a conventional gearbox;

2 is a cross-sectional view of a gearbox provided by an embodiment of the present invention;

Fig. 3 is the enlarged view at the A place of Fig. 2;

Fig. 4 is an enlarged view at B of Fig. 2;

FIG. 5 is a cross-sectional view of a planet carrier of a gearbox provided by an embodiment of the present invention.

In the picture:

10. Planet carrier; 20. Bearing; 30. Box;

11. Main body part; 12. First connecting part; 13. Second connecting part;

21. Upper shell; 22. Lower shell;

3. Transparent cover; 31. Sealed cavity;

4. Bearing;

5. Sealing plate;

61, the first limit plate; 62, the second limit plate;

71. Spacer; 72. Spacer;

8. Planetary gear;

9. Ring gear.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention and should not be construed as limiting the present invention.

In the description of the present invention, unless otherwise expressly specified and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integrated ; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may include the first and second features in direct contact, or may include the first and second features Not directly but through additional features between them. Also, the first feature being "above", "over" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature is "below", "below" and "below" the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.

The technical solutions of the present invention are further described below with reference to the accompanying drawings and through specific embodiments.

Referring to FIG. 2 to FIG. 5 , an embodiment of the present invention provides a gear box including a planet carrier support structure for providing support for the planet carrier. The planet carrier includes a main body portion 11 , a first connecting portion 12 disposed at one end of the main body portion 11 , and a second connecting portion 13 disposed at the other end of the main body portion 11 . The outer diameter of the first connecting portion 12 is larger than the outer diameter of the second connecting portion 13 . path. The planet carrier support structure includes a casing, a transparent cover 3 and a bearing 4, the casing surrounds the radial outer side of the planet carrier, the transparent cover 3 is sleeved on the first connecting portion 12 and is fixedly connected with the casing, and a pair of bearings 4 are arranged on The second connecting portion 13 is located on the inner side of the housing. Since many components are of axisymmetric structure, only half of them are shown in the drawings for the sake of simplicity.

The casing is surrounded by the radial outer side of the planet carrier, the transparent cover 3 supports the first connecting portion 12 of the planet carrier, and the bearing 4 supports the second connecting portion 13 of the planet carrier; since the first connecting portion 12 of the planet carrier The outer diameter of the bearing 4 is larger than the outer diameter of the second connecting part 13. By arranging a pair of bearings 4 on the second connecting part 13 of the planet carrier, the axial dimension of the bearing 4 is reduced, and a bearing seat is omitted, and then The weight and volume are reduced, the production cost is reduced, and the structure is compact and the installation is convenient.

The casing is a split structure, including an upper casing 21 and a lower casing 22, the upper casing 21 surrounds the radial outer side of the first connecting portion 12, and the lower casing 22 surrounds the radial outer side of the second connecting portion 13 and Fitted with bearing 4. The arrangement of the upper casing 21 and the lower casing 22 facilitates installation and disassembly, reduces the weight of a single component, and makes full use of space.

The transparent cover 3 is fixedly connected with the upper casing 21 and is sealed with the first connecting portion 12 . The first connecting portion 12 is exposed to the outside of the upper casing 21 through the transparent cover 3 for assembling with other components. The transparent cover 3 is sealed with the first connection part 12 to prevent dust or impurities from entering the casing, and also prevent the leakage of lubricating oil inside the casing.

The transparent cover 3 is provided with a plurality of sealing cavities 31 from the outer side to the inner side. Each sealing cavity 31 is provided with a sealing ring. The first connecting part 12 is provided with a groove at a position corresponding to the sealing ring. in the groove. The multiple sealing cavities 31 form multi-layer sealing, which has better sealing effect. In this embodiment, the transparent cover 3 is provided with three sealing cavities 31 from the outer side to the inner side. Each sealing cavity 31 is provided with at least one sealing ring, and some sealing chambers 31 are provided with two sealing rings.

In order to enhance the sealing performance, a sealing plate 5 is also included. The sealing plate 5 is sleeved on the first connecting portion 12 and connected to the outer side of the transparent cover 3 to prevent large dust or impurities from entering the sealing cavity 31 .

Since the bearing 4 is arranged on the second connecting portion 13 of the planet carrier, the upper housing 21 matched with the first connecting portion 12 does not need to be provided with a bearing seat, thereby simplifying the structure and reducing the weight.

Two bearings 4 are arranged along the axial direction of the second connecting portion 13 , one bearing 4 is located on the inner side, the other bearing 4 is located on the outer side, and the two bearings 4 are arranged back to back. The inner side of the housing is provided with a flange, the second connecting portion 13 is provided with a protrusion, the outer ring of the inner bearing 4 is in contact with the flange, and the inner ring of the inner bearing 4 is in contact with the protrusion. The flange cooperates with the protrusion to limit the bearing 4 on the inner side. Specifically, the flange is arranged on the lower casing 22 , and the protrusion is arranged around the outer circumference of the second connecting portion 13 .

The planet carrier support structure also includes a first limit plate 61 and a second limit plate 62. The first limit plate 61 is connected to the housing and is in contact with the outer ring of the bearing 4 located on the outside. The second limit plate 62 is connected to The second connection portion 13 is connected to and abuts against the inner ring of the bearing 4 located on the outer side. The first limiting plate 61 cooperates with the second limiting plate 62 to limit the outer bearing 4 .

The shapes of the first limiting plate 61 and the second limiting plate 62 may be set according to actual conditions, and may be in the shape of a ring or an arc, which is not limited herein.

The planet carrier support structure further includes a spacer 71 , and the spacer 71 is located between the two bearings 4 and abuts with the outer ring of the bearing 4 to limit the position of the outer ring of the bearing 4 .

The spacer 71 is annularly sleeved on the second connecting portion 13 , the outer peripheral surface of the spacer 71 is in contact with the housing, and the inner diameter of the spacer 71 does not affect the roller rotation of the bearing 4 . The spacer 71 plays the role of positioning, so that there is a certain interval between the two bearings 4 in the axial direction.

The planet carrier support structure further includes a spacer ring 72 . The spacer ring 72 is located between the two bearings 4 and abuts against the inner ring of the bearing 4 to limit the inner ring of the bearing 4 .

The spacer ring 72 is annularly sleeved on the second connecting portion 13 , the inner peripheral surface of the spacer ring 72 is in contact with the second connecting portion 13 , and the outer diameter of the spacer ring 72 does not affect the roller rotation of the bearing 4 . The spacer ring 72 plays the role of positioning, so that there is a certain interval between the two bearings 4 in the axial direction. The spacer ring 72 cooperates with the spacer ring 71 to limit the inner and outer rings of the bearing 4 , so that the bearing 4 is installed stably.

The gear box also includes a planetary gear 8 and a ring gear 9 , the planetary gear 8 is rotatably arranged on the planet carrier, the ring gear 9 is fixedly connected with the housing, and the planetary gear 8 meshes with the ring gear 9 . Specifically, the planetary gear 8 is arranged on the main body 11 , the ring gear 9 is arranged between the upper casing 21 and the lower casing 22 , the ring gear 9 and the upper casing 21 are connected by bolts, and the ring gear 9 and the lower casing 22 pass through Bolted connection for easy installation and disassembly.

The above embodiments only illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, the present invention also has various changes and changes. These changes and changes are all fall within the scope of the claimed invention. The claimed scope of the present invention is defined by the appended claims and their equivalents.

Claims (10)

1. A planet carrier support structure, the planet carrier comprises a main body portion (11), a first connecting portion (12) arranged at one end of the main body portion (11), and a first connecting portion (12) arranged at the other end of the main body portion (11) Two connection parts (13), the outer diameter of the first connection part (12) is larger than the outer diameter of the second connection part (13); it is characterized in that, the planet carrier support structure comprises: a casing surrounding the radial outer side of the planet carrier; a transparent cover (3), sleeved on the first connecting portion (12) and fixedly connected with the housing; A pair of bearings (4) are arranged on the second connecting portion (13) and located inside the housing. 2 . The planet carrier support structure according to claim 1 , wherein the inner side of the housing is provided with a flange, the second connecting portion (13) is provided with a protrusion, and the bearing located on the inner side is provided with a protrusion. 3 . The outer ring of (4) is in contact with the flange, and the inner ring of the bearing (4) located on the inner side is in contact with the protrusion. 3. The planet carrier support structure according to claim 1, further comprising a first limiting plate (61) and a second limiting plate (62), the first limiting plate (61) being connected to the The housing is connected and abutted with the outer ring of the bearing (4) located on the outer side, the second limiting plate (62) is connected with the second connecting portion (13) and is connected with the bearing located on the outer side The inner ring of (4) abuts. 4. The planet carrier support structure according to claim 1, characterized in that it further comprises a spacer (71), the spacer (71) being located between the two bearings (4) and being connected to the bearings (4). 4) the outer ring abuts. 5 . The planet carrier support structure according to claim 1 , further comprising a spacer ring ( 72 ), the spacer ring ( 72 ) being located between the two bearings ( 4 ) and being connected to the The inner ring of the bearing (4) abuts. 6. The planet carrier support structure according to any one of claims 1-5, wherein the casing comprises an upper casing (21) and a lower casing (22), and the upper casing (21) Surrounding the radially outer side of the first connecting portion (12), the lower casing (22) surrounds the radially outer side of the second connecting portion (13) and cooperates with the bearing (4). 7 . The planet carrier support structure according to claim 6 , wherein the transparent cover ( 3 ) is fixedly connected to the upper casing ( 21 ) and is sealed with the first connecting portion ( 12 ). 8 . connect. 8 . The planet carrier support structure according to claim 7 , wherein a plurality of sealing cavities ( 31 ) are opened on the transparent cover ( 3 ) from the outside to the inside, and each of the sealing cavities ( 31 ) is inside Both are provided with a sealing ring, a groove is provided on the first connecting part (12) at a position corresponding to the sealing ring, and the sealing ring is clamped in the groove. 9 . The planet carrier support structure according to claim 7 , further comprising a sealing plate ( 5 ), the sealing plate ( 5 ) being sleeved on the first connecting portion ( 12 ) and connected to the transparent The outer side of the cover (3) is attached. 10. A gearbox, characterized in that it comprises the planet carrier support structure according to any one of claims 1-9.

Images