CN210622984U

CN210622984U - Main shaft and wind driven generator

Info

Publication number: CN210622984U
Application number: CN201921829711.4U
Authority: CN
Inventors: 唐治平; 潘勇; 石川
Original assignee: Sany Renewable Energy Co Ltd
Current assignee: Sany Renewable Energy Co Ltd
Priority date: 2019-10-28
Filing date: 2019-10-28
Publication date: 2020-05-26
Anticipated expiration: 2029-10-28

Abstract

The embodiment of the utility model provides a main shaft and aerogenerator relates to the aerogenerator field. Aims to solve the problem that the existing main shaft is difficult to manufacture, process and transport integrally. The main shaft comprises a first main shaft body, a second main shaft body and a fixing piece; the first main shaft body is used for being connected with a fan hub, the second main shaft body is used for being connected with a speed increaser, a first connecting portion is arranged at one end of the first main shaft body, a second connecting portion is arranged at one end of the second main shaft body, the outer surface of the first connecting portion is an outer conical surface, the inner surface of the second connecting portion is an inner conical surface matched with the outer conical surface, and the fixing member enables the first main shaft body and the second main shaft body to be fixed relatively. The wind power generator includes a main shaft. The first main shaft body and the second main shaft body are arranged in a segmented manner, so that the size and the weight of a single segment are reduced, and the manufacturing, the processing and the transportation are convenient; the first main shaft body and the second main shaft body are matched through conical surfaces, axial thrust is generated when the main shaft operates, and the conical surfaces are matched and stressed reliably, so that the main shaft can bear bending moment.

Description

Main shaft and wind driven generator

Technical Field

The utility model relates to a aerogenerator field particularly, relates to a main shaft and aerogenerator.

Background

At present, the main shaft of the wind generating set is difficult to integrally manufacture, process and transport according to a manufacturing mode comprising a forged piece, a casting and a welding structure.

SUMMERY OF THE UTILITY MODEL

The objects of the present invention include, for example, providing a spindle that can improve the problems of the prior art of spindle monolithic fabrication, machining and transportation.

The utility model discloses an aim still includes, provides a aerogenerator, and it can improve current main shaft monolithic fabrication, processing and transport and have the problem of difficulty.

The embodiment of the utility model discloses a can realize like this:

the embodiment of the utility model provides a main shaft, including the first main shaft body, the second main shaft body and mounting;

the first main shaft body is used for being connected with a fan hub, the second main shaft body is used for being connected with a speed increaser, the first main shaft body and the second main shaft body are coaxially arranged, one end of the first main shaft body is provided with a first connecting part,

one end of the second main shaft body is provided with a second connecting part which is sleeved with the first connecting part;

the outer surface of the first connecting part is an outer conical surface, the inner surface of the second connecting part is an inner conical surface matched with the outer conical surface, and the fixing part is matched with the first connecting part and the second connecting part simultaneously so as to relatively fix the first spindle body and the second spindle body.

In addition, the embodiment of the present invention provides a spindle, which may further have the following additional technical features:

optionally: the inner conical surface comprises a first conical surface and a second conical surface which are arranged along the axial direction of the second spindle body, and the first conical surface is close to the first spindle body relative to the second conical surface;

the first conical surface is matched with the outer conical surface, and one end, close to the first conical surface, of the second conical surface is used for stopping one end, close to the second main shaft body, of the first connecting portion.

Optionally: the slope of the first conical surface relative to the axis of the second spindle is smaller than the slope of the second conical surface relative to the axis of the second spindle.

Optionally: the first connecting portion is provided with a first pin hole on the peripheral wall, the second connecting portion is provided with a second pin hole on the peripheral wall, and the first pin hole and the second pin hole are corresponding and connected through a fixing piece.

Optionally: the axis of the fixing piece is perpendicular to the axis of the first spindle body.

Optionally: the number of the first pin holes and the number of the second pin holes are multiple and are in one-to-one correspondence;

the plurality of first pin holes are uniformly distributed at intervals along the circumferential direction of the first main shaft body.

Optionally: the main shaft also comprises a shock pad; the shock pad is embedded between the inner conical surface and the outer conical surface.

Optionally: the shock pad is the bar, and distributes along the circumferential direction of first connecting portion.

Optionally: the first main shaft body is provided with a first inner hole penetrating through the first main shaft body, and the first inner hole extends along the axial direction of the first main shaft body; the second spindle body is provided with a second inner hole penetrating through the second spindle body, and the second inner hole extends along the axial direction of the second spindle body; the aperture of the first bore is larger than the aperture of the second bore.

The embodiment of the utility model provides a aerogenerator is still provided. The wind power generator includes a main shaft.

The utility model discloses main shaft and aerogenerator's beneficial effect includes, for example:

the first main shaft body and the second main shaft body are arranged in sections, so that the size and the weight of a single section are reduced, and the manufacturing, the processing, the transportation and the hoisting are facilitated; the first main shaft body and the second main shaft body can be made of different materials, so that the production cost is reduced; the sizes of the inner holes of the first main shaft body and the second main shaft body are not required to be consistent, the aperture of the inner hole can be increased on the premise of meeting the strength, and the weight is reduced to the maximum extent; when the main shaft has a fault, the maintenance can be carried out in a segmented manner, and the maintenance is convenient and fast; the first main shaft body and the second main shaft body are matched through conical surfaces, axial thrust is generated when the main shaft operates, and the conical surfaces are matched and stressed reliably, so that the main shaft can bear bending moment.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic view of a partial structure of a spindle according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of the spindle along a vertical plane passing through the axis according to an embodiment of the present invention.

Icon: 10-a main shaft; 100-a first spindle body; 101-a first bore; 110 — a first connection; 111-outer conical surface; 120-a first pin hole; 200-a second spindle body; 201-a second bore; 210-a second connection; 211-inner conical surface; 212-a first tapered surface; 213-second tapered surface; 220-a second pin hole; 300-fixing element.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that, if the terms "upper", "lower", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the products of the present invention are used, the description is only for convenience of description and simplification, but the indication or suggestion that the indicated device or element must have a specific position, be constructed and operated in a specific orientation, and thus, should not be interpreted as a limitation of the present invention.

Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.

The size of the main shaft of the existing wind generating set is increased along with the increase of the power of a fan, so that the difficulty is brought to manufacturing, processing and transportation; the size of the main shaft is increased and limited by the process, the shape and the size of the whole inner hole of the main shaft are difficult to optimize, and the strength utilization rate of the material cannot be fully exerted. The main shaft and the wind driven generator provided by the embodiment can improve the technical problem.

The spindle 10 provided in the present embodiment is described in detail below with reference to fig. 1 to 2.

Referring to fig. 1, in a main shaft 10 provided in an embodiment of the present invention, one end of the main shaft 10 is used for being connected to a hub of a fan, and the other end of the main shaft 10 is used for being connected to a speed increaser. Referring to the relative position in fig. 1, the left end of the main shaft 10 is used for connecting with a hub of a fan, and the right end of the main shaft 10 is used for connecting with a speed increaser.

The spindle 10 includes a first spindle body 100, a second spindle body 200, and a fixing member 300; the first main shaft body 100 is used for being connected with a fan hub, the second main shaft body 200 is used for being connected with a speed increaser, the first main shaft body 100 and the second main shaft body 200 are coaxially arranged, a first connecting part 110 is arranged at one end of the first main shaft body 100, a second connecting part 210 is arranged at one end of the second main shaft body 200, and the first connecting part 110 is sleeved with the second connecting part 210; the outer surface of the first connecting portion 110 is an outer conical surface 111, the inner surface of the second connecting portion 210 is an inner conical surface 211 matched with the outer conical surface 111, and the fixing member 300 is simultaneously matched with the first connecting portion 110 and the second connecting portion 210, so that the first spindle body 100 and the second spindle body 200 are relatively fixed.

In this embodiment, the first spindle body 100 and the second spindle body 200 are arranged in segments; the axis of the first spindle body 100 coincides with the axis of the second spindle body 200; the first connecting part 110 is integrally formed with the first main shaft body 100, and the second connecting part 210 is integrally formed with the second main shaft body 200; the second connecting portion 210 has a tapered hole, an inner wall of the tapered hole is an inner surface of the second connecting portion 210 and is a tapered surface, and the first connecting portion 110 is disposed in the sleeved hole. The single section is arranged in a segmented manner, so that the size and the weight of the single section are reduced, and the manufacturing, the processing and the transportation are convenient; the first main shaft body 100 and the second main shaft body 200 are fitted to each other by a tapered surface, so that the main shaft 10 can bear a bending moment. The bending moment is one of the internal moments on the section of the stressed member, i.e. the resultant moment of the internal force system perpendicular to the cross section.

Similarly, a plurality of connecting shafts can be sequentially arranged between the first main shaft body 100 and the second main shaft body 200, and the plurality of connecting shafts are sequentially connected in a conical surface fit manner. For example, two connecting shafts, namely a first connecting shaft and a second connecting shaft, are sequentially arranged between the first main shaft body 100 and the second main shaft body 200, a first taper hole is formed at one end of the first connecting shaft, a first taper part is formed at the other end of the first connecting shaft, a second taper hole is formed at one end of the second connecting shaft, a second taper part is formed at the other end of the second connecting shaft, an outer taper surface 111 of the first connecting part 110 of the first main shaft body 100 is matched with an inner wall of the first taper hole of the first connecting shaft, an outer wall of the first taper part of the first connecting shaft is matched with an inner wall of the second taper hole of the second connecting shaft, and an outer wall of the second taper part of the second connecting shaft is matched with an inner taper surface 211 of the second connecting part 210 of the second main shaft; the first connecting portion 110 of the first spindle body 100 and the end of the first connecting shaft having the first taper hole are fixed by a fixing member 300, the end of the first connecting shaft having the first taper portion and the end of the second connecting shaft having the second taper hole are fixed by a fixing member 300, and the end of the second connecting shaft having the second taper portion and the second connecting portion 210 of the second spindle body 200 are fixed by a fixing member 300.

Further, in the present embodiment, the tapered hole is provided on the second connection portion 210; similarly, the first connecting portion 110 is provided with a tapered hole, the inner surface of the first connecting portion 110 is an inner tapered surface 211, the outer surface of the second connecting portion 210 is an outer tapered surface 111, and the first connecting portion 110 is sleeved on the second connecting portion 210.

With reference to fig. 1, the first spindle body 100 is provided with a first inner hole 101 penetrating through the first spindle body 100, and the first inner hole 101 extends along the axial direction of the first spindle body 100; the second main shaft body 200 is provided with a second inner hole 201 penetrating through the second main shaft body 200, and the second inner hole 201 extends along the axial direction of the second main shaft body 200; the aperture of the first bore 101 is larger than the aperture of the second bore 201.

In the present embodiment, the axial direction of the first spindle body 100 coincides with the axial direction of the second spindle body 200. Two ends of the first inner hole 101 penetrate through two end faces of the first spindle body 100, and two ends of the second inner hole 201 penetrate through two end faces of the second spindle body 200.

The first main shaft body 100 is used for being connected with a fan hub, the second main shaft body 200 is used for being connected with a speed increaser, when the wind driven generator works, acting force borne by the first main shaft body 100 is smaller than acting force borne by the second main shaft body 200, the strength of the second main shaft body 200 is larger than that of the first main shaft body 100, and in order to ensure the strength of the second main shaft body 200, the aperture of a second inner hole 201 is smaller; in order to reduce the overall weight of the spindle 10, the first inner hole 101 provided in the first spindle body 100 has a large diameter. Therefore, the inner hole diameters of the first main shaft body 100 and the second main shaft body 200 can be different, so that the inner hole diameters can be increased as much as possible on the premise of meeting the strength requirement, and the weight can be reduced to the greatest extent.

Similarly, the first connecting shaft and the second connecting shaft disposed between the first main shaft body 100 and the second main shaft body 200 may also be disposed with inner holes having different apertures. Compare current main shaft 10 monolithic fabrication, whole section main shaft 10 hole aperture is unanimous and hole aperture needs to satisfy the main shaft 10 and goes up the intensity requirement at the minimum position of diameter, the aperture sets up lessly, it is great to lead to the whole weight of main shaft 10, main shaft 10 segmentation in this embodiment sets up, when aerogenerator moves, the power that each section of main shaft 10 receives is inconsistent, the required intensity of each section also differentiates, therefore, the hole aperture can set up the minimum as far as possible under the prerequisite that satisfies intensity, in order to alleviate the whole weight of main shaft 10, the hole aperture sets up more nimble practicality.

Referring to fig. 2, the inner tapered surface 211 includes a first tapered surface 212 and a second tapered surface 213 disposed along the axial direction of the second spindle body 200, and the first tapered surface 212 is close to the first spindle body 100 relative to the second tapered surface 213; the first tapered surface 212 is engaged with the outer tapered surface 111, and one end of the second tapered surface 213 close to the first tapered surface 212 is used for stopping one end of the first connecting portion 110 close to the second main shaft body 200. That is, in this embodiment, the tapered hole provided in the second connection portion 210 includes a first hole and a second hole that are sequentially provided in communication, and the first hole penetrates through an end portion of the second connection portion 210. The first hole and the second hole are both tapered holes, the inner wall of the first hole is a first tapered surface 212, and the inner wall of the second hole is a second tapered surface 213. The end of the first connecting portion 110 is mostly fitted to the joint of the first hole and the second hole, and the first connecting portion 110 cannot enter the first hole. Wherein the second bore communicates with the second bore 201.

The first connecting part 110 moves along the axial direction of the second spindle body 200, so that the outer tapered surface 111 of the first connecting part 110 is matched with the first tapered surface 212, and the outer tapered surface 111 of the first connecting part 110 cannot be matched with the second tapered surface 213; when the end of the first connection portion 110 moves to the connection between the first tapered surface 212 and the second tapered surface 213, the second tapered surface 213 limits the configuration of the first connection portion 110, and the first connection portion 110 cannot move axially, which means that the first connection portion 110 moves in place.

Specifically, the slope of the first tapered surface 212 with respect to the axis of the second main shaft body 200 is smaller than the slope of the second tapered surface 213 with respect to the axis of the second main shaft body 200.

The "slope (slope)" is the degree of steepness of the surface unit, and the ratio of the vertical height H of the slope surface to the horizontal distance L is generally called the slope. In this embodiment, "the slope of the first tapered surface 212 with respect to the axis of the second main shaft body 200" refers to the ratio of the maximum radius length between the first tapered surface 212 and the axis of the second main shaft body 200 to the axis L1, and "the slope of the second tapered surface 213 with respect to the axis of the second main shaft body 200" refers to the ratio of the maximum radius length between the second tapered surface 213 and the axis of the second main shaft body 200 to the axis L2, where L1 is equal to L2. For example, referring to the relative positions in fig. 2, the inner tapered surface 211 of the second spindle body 200 includes a first tapered surface 212 and a second tapered surface 213 arranged sequentially from left to right, where "the slope of the first tapered surface 212 with respect to the axis of the second spindle body 200" refers to the ratio of the length of the radius between the end of the first tapered surface 212 away from the second tapered surface 213 and the axis of the second spindle body 200 to the axis L1, and "the slope of the second tapered surface 213 with respect to the axis of the second spindle body 200" refers to the ratio of the length of the radius between the end of the second tapered surface 213 away from the first tapered surface 212 and the axis of the second spindle body 200 to the axis L2.

The slope of the first tapered surface 212 is smaller than that of the second tapered surface 213, and the second tapered surface 213 can limit the first connection portion 110. Meanwhile, the slope of the first tapered surface 212 is smaller than that of the second tapered surface 213, which facilitates machining.

With reference to fig. 2, the first connecting portion 110 has a first pin hole 120 formed in a peripheral wall thereof, the second connecting portion 210 has a second pin hole 220 formed in a peripheral wall thereof, and the first pin hole 120 and the second pin hole 220 are connected by a fixing member 300.

After the end of the first connecting portion 110 moves to the connection position of the first tapered surface 212 and the second tapered surface 213, the first pin hole 120 and the second pin hole 220 correspond to each other, and the fixing member 300 sequentially passes through the second pin hole 220 and the first pin hole 120, so as to fix the first spindle body 100 and the second spindle body 200 relatively. In this embodiment, the fixing member 300 is a pin member, and similarly, a key may be used.

With continued reference to fig. 2, the axis of the fixing member 300 is perpendicular to the axis of the first spindle body 100. The axis of the pin member is perpendicular to the axis of the first main shaft body 100, and the pin member can resist shearing force.

With continued reference to fig. 2, the number of the first pin holes 120 and the second pin holes 220 is plural and corresponds to one another; the plurality of first pin holes 120 are uniformly distributed at intervals in the circumferential direction of the first main shaft body 100. The connection strength of the first spindle body 100 and the second spindle body 200 can be increased.

In this embodiment, the main shaft 10 further includes a shock pad (not shown); the cushion is inserted between the inner tapered surface 211 and the outer tapered surface 111. The shock absorption pad is arranged, so that the vibration of the main shaft 10 during operation can be buffered, and the service life of the main shaft 10 is prolonged.

Specifically, the shock-absorbing pads are bar-shaped and distributed along a circumferential direction of the first connection portion 110. Or the shock pad is annular, and the annular shock pad is directly sleeved on the periphery of the first connecting portion 110. Here, the circumferential direction of the first connecting portion 110 is the circumferential direction of the first spindle body 100.

The embodiment of the utility model provides a aerogenerator is still provided. The wind generator comprises a main shaft 10. The wind driven generator comprises a fan and a speed increaser, one end of a main shaft 10 is connected with the fan, and the other end of the main shaft 10 is connected with the speed increaser.

The spindle 10 provided in this embodiment has at least the following advantages:

the main shaft 10, the first main shaft body 100 and the second main shaft body 200 are arranged in a segmented manner, so that the size and the weight of a single segment are reduced, and the manufacturing, processing, transportation and hoisting are facilitated. The first main shaft body 100 and the second main shaft body 200 are matched through the conical surface, axial thrust is generated when the main shaft 10 runs, and the conical surface is matched and stressed reliably, so that the main shaft 10 can bear bending moment. The slope of the first tapered surface 212 is smaller than that of the second tapered surface 213, and the second tapered surface 213 can limit the first connection portion 110. Meanwhile, the slope of the first tapered surface 212 is smaller than that of the second tapered surface 213, which facilitates machining. And shock absorption pads are embedded between the inner conical surfaces 211 and the outer conical surfaces 111, so that the main shaft 10 is buffered, and the service life of the main shaft 10 is prolonged.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A spindle, characterized by:

comprises a first main shaft body (100), a second main shaft body (200) and a fixing piece (300);

the first main shaft body (100) is used for being connected with a fan hub, the second main shaft body (200) is used for being connected with a speed increaser, the first main shaft body (100) and the second main shaft body (200) are coaxially arranged, one end of the first main shaft body (100) is provided with a first connecting part (110), one end of the second main shaft body (200) is provided with a second connecting part (210), and the first connecting part (110) is sleeved with the second connecting part (210);

the outer surface of the first connecting portion (110) is an outer conical surface (111), the inner surface of the second connecting portion (210) is an inner conical surface (211) matched with the outer conical surface (111), and the fixing member (300) is matched with the first connecting portion (110) and the second connecting portion (210) at the same time, so that the first spindle body (100) and the second spindle body (200) are relatively fixed.

2. The spindle of claim 1, wherein:

the inner tapered surface (211) includes a first tapered surface (212) and a second tapered surface (213) arranged along an axial direction of the second spindle body (200), the first tapered surface (212) being close to the first spindle body (100) with respect to the second tapered surface (213);

the first conical surface (212) is matched with the outer conical surface (111), and one end, close to the first conical surface (212), of the second conical surface (213) is used for stopping one end, close to the second spindle body (200), of the first connecting portion (110).

3. The spindle of claim 2, wherein:

the gradient of the first conical surface (212) relative to the axis of the second spindle body (200) is smaller than the gradient of the second conical surface (213) relative to the axis of the second spindle body (200).

4. The spindle of claim 1, wherein:

the peripheral wall of the first connecting part (110) is provided with a first pin hole (120), the peripheral wall of the second connecting part (210) is provided with a second pin hole (220), and the first pin hole (120) and the second pin hole (220) correspond to each other and are connected through the fixing part (300).

5. The spindle of claim 4, wherein:

the axis of the fixing piece (300) is perpendicular to the axis of the first spindle body (100).

6. The spindle of claim 5, wherein:

the number of the first pin holes (120) and the number of the second pin holes (220) are multiple and are in one-to-one correspondence;

the first pin holes (120) are uniformly distributed at intervals in the circumferential direction of the first main shaft body (100).

7. The spindle of claim 1, wherein:

the main shaft further comprises a shock pad;

the shock absorption pad is embedded between the inner conical surface (211) and the outer conical surface (111).

8. The spindle of claim 7, wherein:

the shock pad is in a strip shape and is distributed along the circumferential direction of the first connecting portion (110).

9. The spindle of any one of claims 1 to 8, wherein:

the first spindle body (100) is provided with a first inner hole (101) penetrating through the first spindle body (100), and the first inner hole (101) extends along the axial direction of the first spindle body (100);

the second spindle body (200) is provided with a second inner hole (201) penetrating through the second spindle body (200), and the second inner hole (201) extends along the axial direction of the second spindle body (200);

the aperture of the first bore (101) is larger than the aperture of the second bore (201).

10. A wind power generator characterized by:

the wind power generator comprising a main shaft according to any of claims 1-9.