Main shaft holding device

Abstract

The utility model relates to a main shaft holding device which comprises a center body frame, a first holding hand, a second holding hand and an adjusting layer. An arch-shaped notch is formed in the center body frame, one end of the opening side of the arch-shaped notch is rotatably connected with a first holding hand, the other end of the opening side of the arch-shaped notch is rotatably connected with a second holding hand, the ends, away from the arch-shaped notch, of the first holding hand and the second holding hand are detachably connected, and a holding cavity is defined by the arch-shaped notch, the first holding hand and the second holding hand. The adjusting layer is detachably fixed to the inner wall of the enclasping cavity, and the shape of the inner side of the adjusting layer is matched with a spindle to be enclasped. Compared with the prior art, the main shaft clamping device can clamp main shafts with different outer contours or diameters, and has the advantages of being simple in structure, convenient to maintain, wide in application range and the like.

Description

Technical Field

[0001] The utility model relates to the field of wind power generation equipment, in particular to a main shaft clamping device. Background Art

[0002] During installation and maintenance work on a wind turbine's nacelle, such as when replacing or repairing the wind turbine's gearbox, generator, or main bearings, or other heavy structural components within the nacelle, it is often necessary to secure the wind turbine's main shaft. These components, which are joined together and anchored to the nacelle chassis, are stable in the assembled state. However, when they need to be separated during repair or maintenance of the turbine, static instability and imbalance can occur, potentially leading to damage to the turbine's structural components. This necessitates securing the wind turbine's main shaft.

[0003] For example, patent application CN106795866 discloses a spindle securing device. This device comprises multiple components, including a spindle securing device with one end connected to the wind turbine nacelle floor and the other end secured to the spindle via an inner ring. This inner ring is pushed by a pressure mandrel, enabling the securing of spindles of varying shapes and diameters. Its innovation lies in the inclusion of a crane for hoisting the spindle securing device, enabling the securing of spindles of varying shapes and diameters.

[0004] However, the aforementioned device is extremely complex and expensive to manufacture. After the gearbox is removed, the spindle is subjected to complex forces, not only perpendicular to the ground but also horizontal forces perpendicular to the spindle's direction. Failure of the pressure mandrel in this device would inevitably result in significant losses. Furthermore, the small contact area at both ends of the pressure mandrel and the high forces it is subjected to pose a significant risk of structural deformation over long-term use.

[0005] For example, patent application CN114087140 discloses a spindle securing device that uses a frame and a telescopic clamping mechanism to secure the spindle. The innovation lies in the disclosure of an integrated system and method for maintaining wind turbine components. This method includes a spindle securing device that secures spindles of varying diameters.

[0006] However, the above device has a complex structure and high cost. An upward force of more than 700 tons acts on the telescopic clamping device. In addition, the telescopic rods have a large load capacity and are numerous. Manual operation and adjustment are very troublesome. Once one of them is deformed, maintenance is also extremely troublesome.

[0007] In summary, the current clamping device that can fix spindles of different diameters and shapes has a relatively complex structure, resulting in high manufacturing costs and inconvenience in subsequent maintenance. On the other hand, the clamping device makes the spindle's force complex, and the structure is prone to deformation or damage risks. Utility Model Content

[0008] The purpose of the present invention is to provide a spindle clamping device in order to overcome the defects of the prior art, such as the complicated device structure, high manufacturing cost and inconvenient later maintenance.

[0009] The purpose of the utility model can be achieved through the following technical solutions:

[0010] A main shaft clamping device comprises a central body frame, a first clamping arm, a second clamping arm and an adjustment layer;

[0011] An arched slot is provided on the central body frame, one end of the opening side of the arched slot can be rotatably connected to the first holding hand, and the other end can be rotatably connected to the second holding hand, the first holding hand and the second holding hand are detachably connected at one end away from the arched slot, the arched slot, the first holding hand and the second holding hand form a clamping cavity, the adjustment layer can be detachably fixed on the inner wall of the clamping cavity, and the shape of the inner side of the adjustment layer matches the main shaft to be clamped.

[0012] Preferably, the adjustment layer includes a first adjustment part, a second adjustment part and a third adjustment part. The first adjustment part is detachably fixed to the bottom of the arched slot, the second adjustment part is detachably fixed to the inner side of the first arm, and the third adjustment part is detachably fixed to the inner side of the second arm. The enclosed contours of the inner sides of the first adjustment part, the second adjustment part and the third adjustment part match the outer contour of the main shaft.

[0013] Preferably, the first adjusting member, the second adjusting member and the third adjusting member are all double-layer structures, and the double-layer structure includes a nesting and a backing plate;

[0014] The nesting is an arc-shaped structure and can be detachably fixed on the inner wall of the holding cavity. The pad matches the shape of the nesting and is fixed on the inner side of the nesting.

[0015] Preferably, the nest is fixed to the inner wall of the clamping cavity by bolts.

[0016] Preferably, the pad is a rubber pad, and the pad is glued and fixed to the inner side of the nest.

[0017] Preferably, the central body frame is further connected with a first connecting seat and a second connecting seat, the first connecting seat and the second connecting seat are symmetrically distributed on both sides of the central body frame, and the first connecting seat and the second connecting seat can be detachably connected to the cabin bottom plate.

[0018] Preferably, the device further comprises a first pin and a second pin, wherein the first holding arm is hinged to the central body frame via the first pin, and the second holding arm is hinged to the central body frame via the second pin.

[0019] Preferably, the first holding handle and the second holding handle are respectively provided with bolt holes at one end away from the central body frame, and the first holding handle and the second holding handle are connected by bolts.

[0020] Preferably, a lifting ring is provided at one end of the central body frame away from the first holding handle and the second holding handle.

[0021] Preferably, there are multiple lifting rings, and each lifting ring is symmetrically arranged on both sides of the central body frame.

[0022] Compared with the prior art, the utility model has the following advantages:

[0023] (1) This solution selects an adjustment layer corresponding to the shape of the main shaft according to the shape of the main shaft to be clamped, and detachably fixes the adjustment layer on the inner wall of the clamping cavity formed by the arched slot, the first clamping hand, and the second clamping hand. That is, the enclosed shape of the clamping cavity is adjusted, and then the main shaft is installed on the main shaft using the arched slot. Then, the first clamping hand and the second clamping hand are rotated to connect the movable ends of the first clamping hand and the second clamping hand to complete the clamping and fixing of the main shaft.

[0024] The arched notches on the central body frame pivotally connect the symmetrically positioned first and second grips. A detachable connection at the other ends of the first and second grips controls the opening and closing of the gripping chamber, eliminating the need for a sleeve-mounted mounting method, thereby improving installation efficiency. An adjustable layer within the gripping chamber, adaptable to the shape of the main shaft, ensures universal adaptability for wind turbine main shafts with varying diameters and profiles. This simplifies the gripping mechanism's structure, enhances ease of use, and improves reliability, while reducing its cost.

[0025] (2) This solution sets a first connecting seat and a second connecting seat on both sides of the central body frame, and modularizes the main shaft clamping function and the main shaft fixing function of the clamping device. Bolt holes of various sizes are set on the connecting seat, so that suitable bolt holes can be selected according to the connection size of the cabin bottom plate of different wind turbines. This solves the problem of inconsistent connection size of the cabin bottom plates of different wind turbines at a low cost, and improves the flexibility and applicability of the device.

[0026] (3) In this solution, a first holding hand and a second holding hand are provided on both sides of the arched slot on the central body frame, wherein the first holding hand and the second holding hand are respectively hinged to the central body frame through a pin shaft, and the holding hand at the lower end of the arched slot is used to hold and fix the main shaft in the holding cavity, thereby avoiding the holding device from generating a horizontal force perpendicular to the direction of the main shaft on the main shaft, thereby effectively improving the rigidity and strength of the holding device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic structural diagram of the holding device provided by the present invention;

[0028] Figure 2 A schematic structural diagram of the central body frame provided by the present utility model;

[0029] Figure 3 A schematic structural diagram of the connecting seat provided by the present invention;

[0030] Figure 4 This is a schematic diagram of the structure of the clamping device provided by the present invention and installed on the main shaft;

[0031] In the figure: 1. Central body frame, 2. First arm, 3. Second arm, 4. Adjustment layer, 5. First connecting seat, 6. Second connecting seat, 7. Lifting ring, 8. Cabin bottom plate, 9. Main shaft; 11. Arched slot, 12. First pin, 13. Second pin, 41. First adjusting part, 42. Second adjusting part, 43. Third adjusting part, 44. Nesting, 45. Pad. DETAILED DESCRIPTION

[0032] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0035] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on the present invention.

[0036] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0037] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0038] Example 1

[0039] like Figure 1 As shown, this embodiment provides a spindle clamping device, including a central body frame 1, a first clamping arm 2, a second clamping arm 3 and an adjustment layer 4;

[0040] An arched slot 11 is provided on the central body frame 1. One end of the open side of the arched slot 11 can be rotatably connected to the first holding hand 2, and the other end can be rotatably connected to the second holding hand 3. The first holding hand 2 and the second holding hand 3 are detachably connected at one end away from the arched slot 11. The arched slot 11, the first holding hand 2 and the second holding hand 3 form a clamping cavity. The adjustment layer 4 can be detachably fixed on the inner wall of the clamping cavity. The shape of the inner side of the adjustment layer 4 matches the main shaft to be clamped.

[0041] Working principle: According to the shape of the main shaft to be clamped, select the adjustment layer 4 corresponding to the shape of the main shaft, and detachably fix the adjustment layer 4 on the inner wall of the clamping cavity enclosed by the arched slot 11, the first clamping hand 2 and the second clamping hand 3, that is, adjust the enclosed shape of the clamping cavity, and then use the arched slot 11 to install it on the main shaft, and then rotate the first clamping hand 2 and the second clamping hand 3 to connect the mobile ends of the first clamping hand 2 and the second clamping hand 3 to complete the clamping and fixation of the main shaft.

[0042] The symmetrically arranged first and second grips 2 and 3 are rotatably connected at both ends of an arched notch 11 on the central body frame 1. A detachable connection at the other ends of the first and second grips 2 and 3 controls the opening and closing of the clamping chamber, eliminating the need for a sleeve-mounted mounting method, thereby improving installation efficiency. An adjustable layer 4, adaptable to the shape of the main shaft, is located within the clamping chamber, ensuring universal adaptability for wind turbine main shafts with varying diameters and profiles. This simplifies the clamping device's structure, enhances ease of use, and improves reliability, while reducing its cost.

[0043] Specifically, the adjustment layer 4 includes a first adjustment part 41, a second adjustment part 42 and a third adjustment part 43. The first adjustment part 41 can be detachably fixed to the bottom of the arched slot 11, the second adjustment part 42 can be detachably fixed to the inner side of the first arm 2, and the third adjustment part 43 can be detachably fixed to the inner side of the second arm 3. The inner enclosing contours of the first adjustment part 41, the second adjustment part 42 and the third adjustment part 43 match the outer contour of the main shaft.

[0044] Among them, Figure 2 As shown, the first, second, and third adjusting members 41, 42, and 43 all have a double-layer structure, comprising a nest 44 and a backing plate 45. Nest 44 is arc-shaped and removably fixed to the inner wall of the clamping cavity. Backing plate 45 matches the shape of nest 44 and is fixed inside nest 44. Nest 44 is fixed to the inner wall of the clamping cavity by bolts. Backing plate 45 is a rubber pad and is adhesively fixed to the inner side of nest 44.

[0045] Preferred embodiment, as Figure 3 and Figure 4 As shown, the central body frame 1 is further connected to a first connecting seat 5 and a second connecting seat 6. The first connecting seat 5 and the second connecting seat 6 are symmetrically distributed on both sides of the central body frame 1. The first connecting seat 5 and the second connecting seat 6 can be detachably connected to the cabin floor. The connection type between the central body frame and the first connecting seat 5 and the second connecting seat 6 can be welding, bolt connection, or pin connection.

[0046] A first connecting seat and a second connecting seat are set on both sides of the central body frame, and the main shaft clamping function and the main shaft fixing function of the clamping device are modularly set. Bolt holes of various sizes are set on the connecting seat, so that suitable bolt holes can be selected according to the connection size of the nacelle bottom plate of different wind turbines. This solves the problem of inconsistent connection sizes of the nacelle bottom plates of different wind turbines at a low cost, and improves the flexibility and applicability of the device.

[0047] In a preferred embodiment, the device further comprises a first pin shaft 12 and a second pin shaft 13 , wherein the first holding arm 2 is hingedly connected to the central body frame 1 via the first pin shaft 12 , and the second holding arm 3 is hingedly connected to the central body frame 1 via the second pin shaft 13 .

[0048] The first holding arm 2 and the second holding arm 3 are respectively provided with bolt holes at one end away from the central body frame 1, and the first holding arm 2 and the second holding arm 3 are connected by bolts.

[0049] A first holding hand and a second holding hand are provided on both sides of the arched slot on the central body frame, wherein the first holding hand and the second holding hand are hinged to the central body frame respectively through a pin shaft, and the holding hand at the lower end of the arched slot is utilized to hold and fix the main shaft in the holding cavity, thereby avoiding the holding device from exerting a horizontal force perpendicular to the direction of the main shaft on the main shaft, thereby effectively improving the rigidity and strength of the holding device.

[0050] Specifically, a lifting ring 7 is provided at one end of the central body frame 1 away from the first and second gripping arms 2 and 3. There are multiple lifting rings 7, each symmetrically arranged on either side of the central body frame 1. Preferably, lifting rings 7 are symmetrically provided at the upper end of the central body frame 1 for connecting to a crane to lift the clasping device.

[0051] In combination with the above preferred embodiment, the specific working process of the holding device includes: Figure 4 As shown;

[0052] Confirm the diameter and outline shape of the main shaft 9, and confirm the structure type and connection hole size of the cabin bottom plate 8;

[0053] Select matching nesting and backing plates according to spindle diameter and profile shape;

[0054] Install the nesting plate and the backing plate onto the central body frame 1 away from the first holding hand 2 and the second holding hand 3 respectively;

[0055] After the main shaft clamping device is installed on the ground, the bolts between the first clamping arm and the second clamping arm are not installed yet. Use a crane to lift the main shaft clamping device to the high-altitude wind turbine nacelle through the lifting ring 7;

[0056] Use bolts to install the first connecting seat 5 and the second connecting seat 6 of the main shaft clamping device to the cabin bottom plate to complete the fixing of the clamping device;

[0057] Then, the first holding arm and the second holding arm are connected and fixed using bolts to complete the connection between the holding device and the main shaft 9.

[0058] The above describes in detail the preferred embodiments of the present invention. It should be understood that those skilled in the art can make numerous modifications and variations based on the concepts of the present invention without inventive effort. Therefore, any technical solutions that can be derived by those skilled in the art based on the concepts of the present invention through logical analysis, reasoning, or limited experimentation based on the existing technology should be within the scope of protection defined by the claims.

Claims

1. A spindle clamping device, characterized in that: It includes a central body frame (1), a first arm (2), a second arm (3) and an adjustment layer (4); The central body frame (1) is provided with an arched slot (11), one end of the opening side of the arched slot (11) can be rotatably connected to the first holding hand (2), and the other end can be rotatably connected to the second holding hand (3), the first holding hand (2) and the second holding hand (3) are detachably connected at one end away from the arched slot (11), the arched slot (11), the first holding hand (2) and the second holding hand (3) enclose a clamping cavity, the adjustment layer (4) can be detachably fixed on the inner wall of the clamping cavity, and the shape of the inner side of the adjustment layer (4) matches the main shaft to be clamped.

2. A spindle clamping device according to claim 1, characterized in that: The adjustment layer (4) includes a first adjustment piece (41), a second adjustment piece (42) and a third adjustment piece (43); the first adjustment piece (41) is detachably fixed to the bottom of the arched slot (11); the second adjustment piece (42) is detachably fixed to the inner side of the first arm (2); and the third adjustment piece (43) is detachably fixed to the inner side of the second arm (3); and the inner sides of the first adjustment piece (41), the second adjustment piece (42) and the third adjustment piece (43) are matched with the outer profile of the main shaft.

3. A spindle clamping device according to claim 2, characterized in that: The first adjusting member (41), the second adjusting member (42) and the third adjusting member (43) are all double-layer structures, and the double-layer structure includes a nesting (44) and a pad (45); The nest (44) is an arc-shaped structure and is detachably fixed on the inner wall of the holding cavity. The pad (45) matches the shape of the nest (44) and is fixed on the inner side of the nest (44).

4. A spindle clamping device according to claim 3, characterized in that: The nest (44) is fixed to the inner wall of the clamping cavity by means of bolts.

5. The spindle clamping device according to claim 3, characterized in that: The pad (45) is a rubber pad, and the pad (45) is glued and fixed on the inner side of the nest (44).

6. The spindle clamping device according to claim 1, characterized in that: The central body frame (1) is also connected to a first connecting seat (5) and a second connecting seat (6), wherein the first connecting seat (5) and the second connecting seat (6) are symmetrically distributed on both sides of the central body frame (1), and the first connecting seat (5) and the second connecting seat (6) can be detachably connected to the cabin bottom plate.

7. The spindle clamping device according to claim 1, characterized in that: The device also includes a first pin (12) and a second pin (13), wherein the first holding hand (2) is hinged to the central body frame (1) via the first pin (12), and the second holding hand (3) is hinged to the central body frame (1) via the second pin (13).

8. The spindle clamping device according to claim 1, characterized in that: The first holding hand (2) and the second holding hand (3) are respectively provided with bolt holes at one end away from the central body frame (1), and the first holding hand (2) and the second holding hand (3) are connected by bolts.

9. The spindle clamping device according to claim 1, characterized in that: The central body frame (1) is provided with a lifting ring (7) at one end away from the first holding handle (2) and the second holding handle (3).

10. The spindle clamping device according to claim 9, characterized in that: There are multiple lifting rings (7), and each lifting ring (7) is symmetrically arranged on both sides of the central body frame (1).

Images