Fixing structure of wind power gear box and wind power gear box

Abstract

The utility model relates to the technical field of wind power gear boxes, and provides a fixing structure of a wind power gear box and the wind power gear box. The fixing assembly comprises two fixed supporting seats which are arranged at an interval; one end of the connecting lug is fixed with the wind power gear box, and the other end of the connecting lug is clamped between the two supporting seats; the pin shaft comprises a first large-diameter section and two first small-diameter sections, the two first small-diameter sections are distributed at the two axial ends of the first large-diameter section, and the first large-diameter section is fixedly inserted into the connecting lug; each first small-diameter section is fixedly sleeved with a shaft sleeve, each shaft sleeve comprises a second large-diameter section and a second small-diameter section, the second small-diameter sections are fixedly inserted into the supporting seats, the end faces of one sides of the second large-diameter sections abut against the supporting seats, and the end faces of the other sides of the second large-diameter sections abut against the axial end faces of the first large-diameter sections and the connecting lugs. Therefore, the shaft sleeve can maintain relative fixation between the wind power gear box and the fixing assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power gear boxes, in particular to a fixing structure of a wind power gear box and a wind power gear box. Background Art

[0002] The wind turbine gearbox is a key component of the wind turbine generator. Currently, the elastic support of the wind turbine gearbox with a three-point support structure adopts a pin structure. A connecting ear is installed in the gearbox body, and an elastic pin is installed in the elastic pin hole of the connecting ear. The connecting ear and the elastic pin of the wind turbine gearbox adopt an interference fit. In the following situations, the connecting ear and the elastic pin will be axially misaligned.

[0003] 1. When the axial clearance of the main bearing shaft is too large or fails, the gearbox will be subjected to axial force, causing the connecting ear and the elastic pin to produce axial displacement.

[0004] 2. When the bolts of the elastic fixing assembly that fixes the elastic pin are loose or the elastomer is damaged, additional bending moment will be generated in the connecting ear, causing the elastic pin to move axially.

[0005] Despite significant advancements in wind turbine gearbox design, manufacturing, and maintenance technologies with the rapid development of the wind power industry, axial misalignment between the coupling lug and the elastic pin remains a common operational fault in wind turbine gearboxes. This failure can cause the gearbox to malfunction and potentially lead to severe mechanical damage to the entire wind turbine, even requiring the turbine drive train to be removed from service for repairs.

[0006] Therefore, there is an urgent need for a fixing structure of a wind turbine gearbox and a wind turbine gearbox to solve the above technical problems. Utility Model Content

[0007] The purpose of the utility model is to provide a fixing structure of a wind turbine gearbox and a wind turbine gearbox, which can maintain relative fixation between the wind turbine gearbox and a fixing assembly.

[0008] To achieve this purpose, the present invention adopts the following technical solutions:

[0009] The fixed structure of the wind turbine gearbox includes:

[0010] A fixed assembly, the fixed assembly comprising two fixed and spaced apart support seats;

[0011] A connecting ear, one end of which is fixed to the wind turbine gearbox, and the other end of which is clamped between the two supporting seats;

[0012] A pin shaft, the pin shaft comprising a first large diameter section and two first small diameter sections, the two first small diameter sections being distributed at both axial ends of the first large diameter section, and the first large diameter section being fixedly inserted into the connecting ear;

[0013] A shaft sleeve is provided on each of the above-mentioned first small diameter sections, and the above-mentioned shaft sleeve includes a second large diameter section and a second small diameter section. The above-mentioned second small diameter section is fixedly inserted in the above-mentioned support seat, and one side end face of the above-mentioned second large diameter section abuts against the above-mentioned support seat, and the other side end face abuts against the axial end face of the above-mentioned first large diameter section and the above-mentioned connecting ear.

[0014] As a preferred technical solution for the fixing structure of the wind turbine gearbox, the first large-diameter section is interference-fitted with the connecting ear.

[0015] As a preferred technical solution for the fixing structure of the wind turbine gearbox, the first small-diameter section is interference-fitted with the shaft sleeve.

[0016] As a preferred technical solution for the fixing structure of the wind turbine gearbox, the second small-diameter section is interference-fitted with the support seat.

[0017] As a preferred technical solution for the fixing structure of the wind turbine gearbox, the outer peripheral wall of the second small-diameter section is provided with anti-slip patterns.

[0018] As a preferred technical solution for the fixing structure of the wind turbine gearbox, anti-slip grooves are provided on both axial end surfaces of the second large-diameter section.

[0019] As a preferred technical solution for the fixing structure of the above-mentioned wind turbine gearbox, the fixing assembly further includes a nacelle base, and at least one of the two above-mentioned support bases is detachably connected to the above-mentioned nacelle base.

[0020] As a preferred technical solution for the fixing structure of the wind turbine gearbox, the shaft sleeve is a rigid shaft sleeve.

[0021] A wind power gearbox is also provided, comprising the above-mentioned fixing structure of the wind power gearbox.

[0022] As a preferred technical solution of the above-mentioned wind power gearbox, it also includes a torque arm and a box body, the middle part of the above-mentioned torque arm is fixed to the above-mentioned box body, and the above-mentioned connecting ears are provided on opposite sides of the above-mentioned torque arm.

[0023] Beneficial effects of the utility model:

[0024] The utility model provides a fixing structure of a wind turbine gearbox and a wind turbine gearbox, wherein the fixing structure of the wind turbine gearbox includes a fixing assembly, a connecting ear, a pin shaft and a sleeve. The fixing assembly includes two fixed and spaced support seats; one end of the connecting ear is fixed to the wind turbine gearbox, and the other end is clamped between the two support seats; the pin shaft includes a first large diameter section and two first small diameter sections, the two first small diameter sections are distributed at both axial ends of the first large diameter section, and the first large diameter section is fixedly inserted into the connecting ear; a sleeve is fixedly provided on each first small diameter section, and the sleeve includes a second large diameter section and a second small diameter section, and the second small diameter section is fixedly inserted into the support seat, one end face of the second large diameter section abuts against the support seat, and the other end face abuts against the axial end face of the first large diameter section and the connecting ear.

[0025] In this way, when the connecting ear has a tendency to move axially along the pin relative to the fixed assembly, the end face of the connecting ear abuts against the second large diameter section of the sleeve to limit the relative displacement of the connecting ear and the fixed assembly; when the pin has a tendency to move axially along the pin relative to the fixed assembly, one side end face of the first large diameter section of the pin abuts against the second large diameter section of the sleeve on the same side, and the first small diameter section on the other side of the pin pulls the second large diameter section of the sleeve on the other side to abut against the connecting ear to limit the relative movement of the pin relative to the fixed assembly. In this way, the stability of the wind power gearbox can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0027] Figure 1 This is a schematic diagram of the assembly of the fixed structure of the wind turbine gearbox and the wind turbine gearbox provided by an embodiment of the utility model;

[0028] Figure 2 This is a schematic structural diagram of a fixed structure of a wind turbine gearbox provided by an embodiment of the present utility model;

[0029] Figure 3 This is a schematic structural diagram of the fixed structure (excluding the shaft sleeve) of the wind turbine gearbox provided by an embodiment of the present utility model;

[0030] Figure 4 It is a structural schematic diagram of the shaft sleeve provided by an embodiment of the utility model.

[0031] In the picture:

[0032] 100. Fixed structure;

[0033] 110, fixing assembly; 111, support base; 111a, first end surface A; 111b, first end surface B; 112, cabin base;

[0034] 120, connecting ear; 121, second end surface A; 122, second end surface B;

[0035] 130. Pin; 131. First large diameter section; 132. First small diameter section; 132a, first small diameter section A; 132b, first small diameter section B; 133a, first shoulder A; 133b, first shoulder B;

[0036] 140. Bushing; 141. Second small diameter section; 141a, second small diameter section A; 141b, second small diameter section B; 142. second large diameter section; 142a, second large diameter section A; 142b, second large diameter section B; 143a, second shoulder A; 143b, second shoulder B;

[0037] 200. Wind turbine gearbox; 210. Box body. DETAILED DESCRIPTION

[0038] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0039] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0040] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0041] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0042] like Figures 1 to 4 As shown, the present invention provides a fixing structure of a wind turbine gearbox, including a fixing assembly 110 , a connecting ear 120 , a pin 130 and a shaft sleeve 140 . Among them, the fixing assembly 110 includes two fixed and spaced support seats 111; one end of the connecting ear 120 is fixed to the wind turbine gearbox 200, and the other end is clamped between the two support seats 111; the pin shaft 130 includes a first large diameter section 131 and two first small diameter sections 132, the two first small diameter sections 132 are distributed at the axial ends of the first large diameter section 131, and the first large diameter section 131 is fixedly inserted in the connecting ear 120; a shaft sleeve 140 is fixedly sleeved on each first small diameter section 132, the shaft sleeve 140 includes a second large diameter section 142 and a second small diameter section 141, and the second small diameter section 141 is fixedly inserted in the support seat 111, one side end face of the second large diameter section 142 abuts against the support seat 111, and the other side end face abuts against the axial end face of the first large diameter section 131 and the connecting ear 120.

[0043] Specifically, the two support seats 111 are respectively marked as support seat A and support seat B, support seat A and support seat B are spaced apart in the first direction, the end face of the support seat A facing the support seat B is marked as the first end face A111a, the end face of the support seat B facing the support seat A is marked as the first end face B111b, the support seat A is provided with a first plug hole A along the first direction, and the support seat B is provided with a first plug hole B along the first direction; part of the connecting ear 120 is located between the first end face A111a and the first end face B111b, the connecting ear 120 is provided with a second plug hole along the first direction, and the two end faces of the connecting ear 120 in the first direction are respectively marked as the second end face A121 and the second end face B122, wherein the second end face A121 is opposite to the first end face A111a, and the second end face B122 is opposite to the first end face B111b; pin The shaft 130 includes a first large diameter section 131 and a first small diameter section 132. The two first small diameter sections 132 are respectively recorded as the first small diameter section 132A and the first small diameter section 132B. A first shaft shoulder A133a is formed between the first small diameter section 132A and the first large diameter section 131, and a first shaft shoulder B133b is formed between the first small diameter section 132B and the first large diameter section 131. The first large diameter section 131 is fixedly inserted in the second plug-in hole, and the two first small diameter sections 132 can be respectively inserted in the two support seats 111. It is assumed that the first small diameter section 132A is inserted in the first plug-in hole A of the support seat A, and the first small diameter section 132B is inserted in the first plug-in hole B of the support seat B. The first shaft shoulder A133a and the second end face A121 are in the same plane, and the first shaft shoulder B133b and the second end face B122 are in the same plane.

[0044] The sleeve 140 includes two sleeves, which are respectively denoted as sleeve A and sleeve B. Sleeve A includes a second small diameter section 141A and a second large diameter section 142A, and a second shoulder A143a is formed between the second small diameter section 141A and the second large diameter section 142A. Sleeve B includes a second small diameter section 141B and a second large diameter section 142B, and a second shoulder B143b is formed between the second small diameter section 141B and the second large diameter section 142B. The sleeve A is sleeved on the first small diameter section 132A of the pin 130, and the second small diameter section 141A is fixedly inserted in the first plug-in hole A of the support seat A, and is clamped between the first small diameter section 132A and the support seat A; the second large diameter section 142A is exposed outside the first plug-in hole A, and one side end face of the second large diameter section 142A is the second shoulder A143a, which abuts against the first end face A111a, and the other side end face of the second large diameter section 142A abuts against the first shoulder A133a of the pin 130 and the second end face A121 of the connecting ear 120 at the same time. The sleeve B is sleeved on the first small diameter section 132B of the pin 130, and the second small diameter section 141B is fixedly inserted in the first plug-in hole B of the support seat B, and is clamped between the first small diameter section 132B and the support seat B; the second large diameter section 142B is exposed outside the first plug-in hole B, and one side end face of the second large diameter section 142B is the second shoulder B143b, which abuts against the first end face B111b, and the other side end face of the second large diameter section 142B abuts against the first shoulder B133b of the pin 130 and the second end face B122 of the connecting ear 120 at the same time.

[0045] In this way, when the connecting ear 120 has a tendency to move along the first direction toward the side of the support seat A, the second end face A121 abuts against the axial end face of the second large diameter section 142A to prevent relative displacement; when the connecting ear 120 has a tendency to move along the first direction toward the side of the support seat B, the second end face B122 abuts against the axial end face of the second large diameter section 142B to prevent relative displacement. When the pin 130 has a tendency to move toward the side of the support seat A along the first direction, the first end face A111a of the first large diameter section 131 of the pin 130 abuts against the axial end face of the second large diameter section 142A, and at the same time, the first small diameter section 132B of the pin 130 moves together with the sleeve B, so that the axial end face of the second large diameter section 142B of the sleeve B abuts against the first end face B111b of the connecting ear 120 to prevent relative displacement; when the pin 130 has a tendency to move toward the side of the support seat B along the first direction, the first end face B111b abuts against the axial end face of the second large diameter section 142B, and at the same time, the first small diameter section 132A of the pin 130 moves together with the sleeve A, so that the axial end face of the second large diameter section 142A of the sleeve A abuts against the first end face A111a of the connecting ear 120 to prevent relative displacement. In this way, the connection ear 120 , the pin shaft 130 and the fixing assembly 110 can be kept relatively fixed, thereby maintaining the relative fixation between the wind turbine gearbox 200 and the fixing assembly 110 .

[0046] Optionally, the first large diameter section 131 of the pin 130 forms an interference fit with the connecting ear 120. Specifically, the radius of the second insertion hole of the connecting ear 120 is smaller than the radius of the first large diameter section 131 of the pin 130. Thus, when the first large diameter section 131 of the pin 130 is inserted into the second insertion hole of the connecting ear 120, an interference fit is formed, thereby ensuring the relative fixation of the pin 130 and the connecting ear 120, and the structure is simple and easy to assemble.

[0047] Optionally, the first small-diameter section 132 of the pin 130 forms an interference fit with the sleeve 140. Specifically, the inner diameter of the sleeve 140 is smaller than the radius of the first small-diameter section 132 of the pin 130. Thus, when the first small-diameter section 132 of the pin 130 is inserted into the sleeve 140, an interference fit is formed. This ensures that the pin 130 and the sleeve 140 are relatively fixed, and the structure is simple and easy to assemble.

[0048] Optionally, the second small-diameter section 141 of the sleeve 140 is interference-fitted with the support base 111. Specifically, the radius of the first insertion hole of the support base 111 is smaller than the radius of the second small-diameter section 141 of the sleeve 140. Thus, when the second small-diameter section 141 of the sleeve 140 is inserted into the first insertion hole of the support base 111, an interference fit is formed. This ensures that the sleeve 140 and the support base 111 are relatively fixed, and the structure is simple, making assembly easy.

[0049] Optionally, the outer wall of the second small diameter section 141 of the sleeve 140 is provided with anti-skid lines. The anti-skid lines can increase the friction between the second small diameter section 141 of the sleeve 140 and the sleeve 140, further maintaining the relative stability of the connecting ear 120 and the fixing assembly 110.

[0050] Optionally, anti-slip grooves are provided on both axial end surfaces of the second large diameter section 142 of the sleeve 140. This can increase the friction between the sleeve 140 and the support seat 111 of the fixing assembly 110 and between the connecting ear 120 and the first large diameter section 131 of the pin 130.

[0051] Optionally, the fixing assembly 110 further includes a cabin base 112, and at least one of the two support bases 111 is detachably connected to the cabin base 112, so as to facilitate installation.

[0052] Optionally, the shaft sleeve 140 is a steel shaft sleeve. The shaft sleeve 140 is made of steel, has good wear resistance, and has a long service life, which can reduce the wear of the pin 130 of the connecting ear 120.

[0053] A wind turbine gearbox 200 is also provided, comprising the above-mentioned fixing structure of the wind turbine gearbox.

[0054] Optionally, the wind turbine gearbox 200 further includes a torque arm and a box body 210 , wherein the middle portion of the torque arm is fixed to the box body 210 , and connecting ears 120 are provided on opposite sides of the torque arm.

[0055] Furthermore, the above are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions are possible for those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. The fixed structure of the wind turbine gearbox is characterized by: include: A fixed assembly (110), the fixed assembly (110) comprising two fixed and spaced support seats (111); A connecting ear (120), one end of the connecting ear (120) is fixed to the wind power gear box (200), and the other end is clamped between the two support seats (111); A pin shaft (130), the pin shaft (130) comprising a first large diameter section (131) and two first small diameter sections (132), the two first small diameter sections (132) being distributed at both axial ends of the first large diameter section (131), and the first large diameter section (131) being fixedly inserted into the connecting ear (120); A shaft sleeve (140) is provided on each of the first small diameter sections (132), and the shaft sleeve (140) includes a second large diameter section (142) and a second small diameter section (141). The second small diameter section (141) is fixedly inserted into the support seat (111). One end face of the second large diameter section (142) abuts against the support seat (111), and the other end face abuts against the axial end face of the first large diameter section (131) and the connecting ear (120).

2. The fixing structure of the wind turbine gearbox according to claim 1, characterized in that: The first large diameter section (131) is interference fit with the connecting ear (120).

3. The fixing structure of the wind turbine gearbox according to claim 1, characterized in that: The first small-diameter section (132) is interference-fitted with the shaft sleeve (140).

4. The fixing structure of the wind turbine gearbox according to claim 1, characterized in that: The second small-diameter section (141) is interference-fitted with the support seat (111).

5. The fixing structure of the wind turbine gearbox according to claim 1, characterized in that: The outer peripheral wall of the second small-diameter section (141) is provided with anti-slip lines.

6. The fixing structure of the wind turbine gearbox according to claim 1, characterized in that: Anti-slip grooves are provided on both axial end surfaces of the second large-diameter section (142).

7. The fixing structure of the wind turbine gearbox according to claim 1, characterized in that: The fixing assembly (110) further comprises a cabin base (112), and at least one of the two support bases (111) is detachably connected to the cabin base (112).

8. The fixing structure of a wind turbine gearbox according to any one of claims 1 to 7, characterized in that: The shaft sleeve (140) is a rigid shaft sleeve.

9. Wind power gearbox, characterized in that, A fixing structure for a wind turbine gearbox comprising the structure described in any one of claims 1 to 8.

10. The wind turbine gearbox according to claim 9, characterized in that: It also includes a torque arm and a box body (210), wherein the middle portion of the torque arm is fixed to the box body (210), and the connecting ears (120) are provided on opposite sides of the torque arm.

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