Lifting appliance
By designing a lifting device that connects to the pitch bearing and blades, the blades and pitch bearings can be directly lifted, solving the problems of high cost and complex operation in existing technologies and realizing an efficient and low-cost lifting and replacement process.
Patent Information
- Application Number
- CN202520269351.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-19
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2035-02-19
AI Technical Summary
In the existing technology, replacing wind turbine blades and pitch bearings requires the use of large cranes, which is costly and complex to operate. Furthermore, the increased weight of the blades makes lifting more difficult and causes frequent cracking of the pitch bearings.
Design a lifting device that connects to the pitch bearing and blades via a lifting beam, allowing the pitch bearing and blades to be lifted directly using the lifting device, eliminating the need for a large crane. The lifting device includes a support beam, a lifting joint, and a blade braking structure to ensure lifting stability and safety.
It reduces the cost of replacing blades and pitch bearings, simplifies the operation process, reduces the lifting weight, avoids the rental cost of large cranes, and improves lifting efficiency and safety.
Smart Images
Figure CN223674149U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a hoisting tool field, concretely relates to a lifting appliance. BACKGROUND
[0002] At present, the blade of the wind turbine generator set develops towards super long flexibility, with the increase of the blade length, the hoisting and installation difficulty and cost increase, and with the operation of the fan, various problems of the blade appear, in order to ensure the normal operation of the unit, the damaged blade needs to be replaced. Moreover, with the increase of the weight of the blade, the problem of cracking of the variable pitch bearing also frequently occurs. And the existing replacement blade or variable pitch bearing scheme needs to use a large crane, the impeller is disassembled from the tower as a whole, hoisted to the ground, and then the new blade is hoisted and installed upwards to realize the replacement of the blade, and the cost is high. SUMMARY
[0003] Therefore, the utility model aims at providing a lifting appliance, which can only hoist the variable pitch bearing and the blade to the ground and to the hub for installation, can not use large lifting equipment, and reduces the replacement cost.
[0004] An embodiment of the utility model provides a lifting appliance for hoisting the variable pitch bearing and the blade of the wind turbine generator set, and the lifting appliance comprises a lifting beam, the lifting beam is used for being connected with the variable pitch bearing to hoist the blade connected with the variable pitch bearing through the variable pitch bearing.
[0005] Further, in some embodiments, the variable pitch bearing has a plurality of first bolt holes for connecting the hub of the wind turbine generator set; the lifting beam comprises a support beam and a lifting connecting part, the support beam is used for being connected with at least two first bolt holes in the plurality of first bolt holes, and the lifting connecting part is arranged on the support beam and is used for being connected with a lifting rope of a lifting device.
[0006] Further, in some embodiments, the support beam is provided with a second bolt hole, the second bolt hole is used for being distributed opposite to the first bolt hole and being in communication with each other, so that a bolt passes through the first bolt hole and the second bolt hole.
[0007] Further, in some embodiments, the support beam comprises a center support, the lifting connecting part is arranged on the center support; at least two support beams are distributed in a circumferential direction around the center support, and one end of each support beam away from the center support is used for being connected with the variable pitch bearing.
[0008] Further, in some embodiments, the support beam is in an axisymmetric structure.
[0009] Further, in some embodiments, the lifting appliance further comprises a blade brake structure used for being connected with the variable pitch bearing or the lifting beam, and the blade brake structure can be tightly combined with the inner wall of the blade to limit the rotation of the blade.
[0010] Further, in some embodiments, the pitch bearing has a plurality of first bolt holes for connecting a hub of the wind turbine generator set, and the blade brake structure is connectable with several first bolt holes of the plurality of first bolt holes.
[0011] Further, in some embodiments, the blade brake structure comprises a brake bracket, a plug-in piece arranged on the brake bracket, the plug-in piece being used for plugging into the first bolt hole, a brake pad used for contacting an inner wall of the blade, and a pressing piece connecting the brake bracket and the brake pad, the pressing piece being used for pressing the brake pad on the inner wall of the blade.
[0012] Further, in some embodiments, the plug-in piece is a plug pin or a bolt.
[0013] Further, in some embodiments, a surface of the brake pad is provided with an elastic pad, and the brake pad contacts the blade through the elastic pad.
[0014] Further, in some embodiments, the pressing piece is a brake jack.
[0015] Further, in some embodiments, the number of the blade brake structures is a plurality, and the blade brake structures are distributed in a circumferential direction around the pitch bearing.
[0016] The lifting appliance provided by the embodiment of the utility model makes the lifting beam of the lifting appliance connected with the pitch bearing, and when the pitch bearing and the blade connected with the pitch bearing are installed or disassembled, the pitch bearing and the blade can be directly hoisted by the lifting appliance, compared with the related art of hoisting the whole impeller by using a large crane, the hoisting weight is greatly reduced, the large crane can be omitted, the rental cost of the large crane is saved, and the disassembly and assembly cost is saved.
[0017] Further aspects and / or advantages of the overall concept of the utility model will be apparent from parts of the following description, and / or will be apparent from the description itself, or can be learned from the practice of the overall concept of the utility model. BRIEF DESCRIPTION OF DRAWINGS
[0018] The above and other objects and features of the utility model will become more apparent from the following description made with reference to the drawings, in which:
[0019] Figure 1 Fig. 1 shows a structure schematic view of a lifting appliance and a pitch bearing connected together according to an embodiment of the utility model;
[0020] Figure 2 Fig. 2 shows a top view schematic view of the lifting appliance and the pitch bearing connected together according to an embodiment of the utility model;
[0021] Figure 3 Fig. 3 shows a side view schematic view of the lifting appliance and the pitch bearing connected together according to an embodiment of the utility model.
[0022] Figure 4 A structural schematic diagram of a hanger of one embodiment of the present application is shown.
[0023] Figure 5 A structural schematic diagram of a blade brake structure of one embodiment of the present application is shown.
[0024] Figures 1 to 5 BRIEF DESCRIPTION OF DRAWINGS
[0025] 100 hanger beam; 110 support beam; 111 center support; 112 support beam; 1121 second bolt hole; 120 hanger joint;
[0026] 200 blade brake structure; 210 brake support; 220 plug-in piece; 230 brake pad; 240 pressing piece;
[0027] 300 variable pitch bearing; 310 first bolt hole; 320 third bolt hole;
[0028] 400 blade. DETAILED DESCRIPTION
[0029] The following detailed description is provided to help the reader understand the method, device, and / or system described herein. However, various changes, modifications, and equivalents of the method, device, and / or system described herein can be apparent to the reader, after understanding the disclosure provided herein. For example, the order of the operations described herein can be altered, and some operations can be performed in parallel, as would be apparent to one of ordinary skill in the art after understanding the disclosure provided herein. Furthermore, the description of features known to one of ordinary skill in the art can be omitted so as to not obscure the description of the method, device, and / or system described herein.
[0030] The features described herein can be implemented in different ways depending upon the specific application. Rather than be limited to the examples described herein, it is therefore intended that the disclosure herein cover all ways of implementing the method, device, and / or system described herein.
[0031] As used herein, the term "and / or" includes any one of the associated listed items, as well as any combination of any two or more of the associated listed items.
[0032] Although terms such as "first", "second", and "third" can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. Instead, these terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, terms of a first element, a first component, a first region, a first layer or a first section described in the examples herein can also be termed as a second element, a second component, a second region, a second layer or a second section without departing from the teachings of the examples.
[0033] In the description, when an element such as a layer, a region or a substrate is described as "on", "connected to" or "joined to" another element, the element can be directly on, directly connected to or directly joined to the other element, or one or more other elements can be interposed therebetween. In contrast, when an element is described as "directly on", "directly connected to" or "directly joined to" another element, no other element can be interposed therebetween.
[0034] The terms used herein are only used to describe various examples and not to limit the disclosure. The singular form is intended to include the plural form unless the context clearly indicates otherwise. The terms "comprise", "include" and "have" indicate the presence of a stated feature, number, operation, component, element and / or combination thereof, but do not exclude the presence or addition of one or more other features, numbers, operations, components, elements and / or combinations thereof. The term "a plurality of" represents any number of two or more.
[0035] The orientation terms "above", "below", "top" and "bottom" in the present application are defined based on the orientation of the product in the normal use state, unless otherwise specified in the drawings.
[0036] Unless otherwise defined, all terms used herein, including technical terms and scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which the present application belongs after the understanding of the present application. Unless explicitly defined herein, terms such as those defined in a general dictionary should be interpreted to have the same meaning as their meanings in the relevant field and the present application, and should not be interpreted too ideally or too formally.
[0037] The embodiments of the present application will be described below with reference to the accompanying drawings. Figures 1 to 5 The hoist provided by the embodiments of the present application is introduced.
[0038] As Figures 1 to 4The first aspect of the utility model discloses a kind of spreaders, for hoisting the variable pitch bearing 300 and blade 400 of wind turbine unit, spreader includes: beam 100, beam 100 is used to connect with variable pitch bearing 300, to hoist blade 400 connected with variable pitch bearing 300 by variable pitch bearing 300 with variable pitch bearing 300.
[0039] The spreader provided by the utility model embodiment makes the beam 100 of the spreader connect with the variable pitch bearing 300, when installing or disassembling the variable pitch bearing 300 and the blade 400 connected with the variable pitch bearing 300, the variable pitch bearing 300 and the blade 400 can be hoisted simultaneously by directly using the spreader, compared with hoisting the whole impeller by using large crane in the related art, the hoisting weight is greatly reduced, the large crane can be eliminated, the rental cost of the large crane is saved, and the disassembly and assembly cost is saved.
[0040] Further, in some embodiments, as shown in Figure 1 And Figure 2 Variable pitch bearing 300 has a plurality of first bolt holes 310 for connecting the hub of wind turbine unit. Beam 100 includes support beam 110 and lifting connection part 120, support beam 110 is used to connect with at least two first bolt holes 310 in the plurality of first bolt holes 310, and lifting connection part 120 is arranged on support beam 110 and is used to connect with the lifting rope of hoisting equipment.
[0041] In these embodiments, when hoisting the variable pitch bearing 300 and the blade 400 connected with the variable pitch bearing 300, the lifting rope of hoisting equipment is connected with the lifting connection part 120, and the support beam 110 is connected with the variable pitch bearing 300, to hoist the variable pitch bearing 300 and the blade 400 connected with the variable pitch bearing 300 simultaneously. As for the connection mode of support beam 110 and variable pitch bearing 300, here the support beam 110 of beam 100 is connected with the first bolt hole 310 on the variable pitch bearing 300 for connecting with the hub, without additional machining connection structure on the variable pitch bearing 300 to connect the support beam 110, the structure of the variable pitch bearing 300 can be simplified, and the structural strength of the variable pitch bearing 300 is ensured.
[0042] In the specific application process, when hoisting the disassembled blade and variable pitch bearing downward, part of the first bolts connected with the variable pitch bearing 300 can be disassembled, so that the first bolts are removed from the first bolt hole 310, which facilitates the connection of the support beam 110 and the first bolt hole 310, so as to realize the connection of the support beam 110 and the variable pitch bearing 300.
[0043] In addition, as shown in Figure 1 And Figure 2As shown, the third bolt hole 320 is further provided on the variable pitch bearing 300, and the bolt passes through the third bolt hole 320 to connect the hub. One of the first bolt hole 310 and the third bolt hole 320 is located on the inner ring of the variable pitch bearing 300, and the other is located on the inner ring of the variable pitch bearing 300.
[0044] Further, as shown in Figure 1 and Figure 4 , the support beam 110 is provided with a second bolt hole 1121, which is used to be distributed and communicated with the first bolt hole 310, so that the second bolt passes through the first bolt hole 310 and the second bolt hole 1121. Here, the second bolt passes through the first bolt hole 310 and the second bolt hole 1121 to connect the support beam 110 and the variable pitch bearing 300 together, which is firm.
[0045] It should be noted that the first bolt and the second bolt are both bolts, and are only defined as the first bolt for connecting the hub and the variable pitch bearing 300, and the second bolt for connecting the variable pitch bearing 300 and the support beam 110 for the convenience of distinguishing. The first bolt and the second bolt can be the same or different.
[0046] Of course, in other embodiments, a tapered bolt, a connecting rope or other connecting member can also be used to pass through the first bolt hole 310 and the second bolt hole 1121 to connect the support beam 110 and the variable pitch bearing 300 together. Alternatively, the second bolt hole 1121 is not provided on the support beam 110, but is connected with the first bolt hole 310 through other structures. Alternatively, the support beam 110 and the variable pitch bearing 300 are not connected through the first bolt hole 310. The specific connection mode of the support beam 110 and the variable pitch bearing 300 can be various, which is not limited to the above embodiments.
[0047] Further, in some embodiments, as shown in Figures 1 to 4 , the hanging beam 100 includes a support beam 110 and a hanging connecting part 120, and the support beam 110 includes a central support 111 and at least two support beams 112. The hanging connecting part 120 is arranged on the central support 111. The at least two support beams 112 are distributed circumferentially around the central support 111. The end of each support beam 112 away from the central support 111 is used to connect with the variable pitch bearing 300.
[0048] In these embodiments, arranging the hanging connecting part 120 on the centrally located central support 111 can avoid the center of gravity from deviating and falling off during hoisting, which is conducive to stably hoisting the variable pitch bearing 300 and the blade 400. Moreover, connecting the circumferentially distributed at least two support beams 112 with the variable pitch bearing 300, the two are connected at multiple circumferential points, which is firm and is conducive to stable hoisting.
[0049] As an example, the support beams 110 are distributed in an axisymmetric or centrosymmetric manner. For example, the support beams 110 are in the shape of a straight line, a cross, or a horizontal cross, which is conducive to stabilizing the hoisting variable-pitch bearing 300 and the blade 400.
[0050] As an example, as shown in Figure 1 , the number of the hoisting connecting parts 120 is one, and the hoisting connecting part 120 is a hook or a ring.
[0051] As an example, as shown in Figure 4 , each support beam 112 is provided with a second bolt hole 1121 at an end away from the central support 111. A second bolt passes through the second bolt hole 1121 and a first bolt hole 310 on the variable-pitch bearing 300, achieving the connection of the support beam 110 and the variable-pitch bearing 300.
[0052] Of course, in other embodiments, the support beams 110 can also not be in the above structure, but can also be in the shape of a cross, etc. The hoisting connecting part 120 can also not be one, but can be multiple, distributed at multiple positions of the support beam 110.
[0053] Further, in some embodiments, as shown in Figures 1 to 4 , the hoist further comprises a blade brake structure 200 for connecting with the variable-pitch bearing 300 or connecting with the hoisting beam 100, and the blade brake structure 200 can tightly fit with the inner wall of the blade 400 to limit the rotation of the blade 400.
[0054] In these embodiments, the hoist is further configured with the blade brake structure 200, which is installed on the variable-pitch bearing 300 or the hoisting beam 100 and tightly fits with the inner wall of the blade 400, which can prevent the blade 400 from rotating during hoisting and ensure the stability of hoisting. Moreover, it is convenient to place the blade 400 in a specific posture on the ground, which can avoid the damage of the blade 400 due to bumping.
[0055] Further, the number of the blade brake structure 200 can be multiple, and the multiple blade brake structures 200 are distributed in a circumferential interval around the variable-pitch bearing 300. The multiple blade brake structures 200 tightly fit with the inner wall of the blade 400 at multiple circumferential positions, which has a better limiting effect on the blade 400 and ensures that the blade 400 will not rotate. As shown in Figure 1 and Figure 4 , the number of the blade brake structure 200 is four.
[0056] For the specific structure of the blade brake structure 200, in some embodiments, as shown in Figure 1 , Figure 4 and Figure 5 , the blade brake structure 200 comprises a brake body 210 and a plurality of brake pads 220.As shown, the blade brake structure 200 comprises: a brake support 210, the brake support 210 is used to be connected with the variable pitch bearing 300 or the boom 100; a brake pad 230, the brake pad 230 is used to be in contact with the inner wall of the blade 400; a pressing member 240, the pressing member 240 is connected with the brake support 210 and the brake pad 230, and the pressing member 240 is used to press the brake pad 230 on the inner wall of the blade 400. Here, the pressing member 240 is used to press the brake pad 230 on the inner wall of the blade 400, which can effectively prevent the blade 400 from rotating relative to the variable pitch bearing 300.
[0057] As an example, as shown in Figure 5 , the pressing member 240 is a brake top screw.
[0058] As an example, the surface of the brake pad 230 is provided with an elastic pad, and the brake pad 230 is in contact with the blade 400 through the elastic pad, which can avoid that the blade brake structure 200 wears the blade 400. The elastic pad can be a rubber pad.
[0059] For the setting position of the blade brake structure 200, in some embodiments, the variable pitch bearing 300 has a plurality of first bolt holes 310 for connecting the hub of the wind turbine generator set, and the blade brake structure 200 can be connected with several first bolt holes 310 of the plurality of first bolt holes 310.
[0060] In these embodiments, the blade brake structure 200 is connected with the first bolt hole 310 on the variable pitch bearing 300 for connecting the hub, without the need to additionally process the connecting structure on the variable pitch bearing 300 to connect the blade brake structure 200, which can simplify the structure of the variable pitch bearing 300 and ensure the structural strength of the variable pitch bearing 300.
[0061] In specific application process, part of the first bolts connecting the hub and the variable pitch bearing 300 together can be disassembled, and these first bolts are removed from the first bolt hole 310, so that the blade brake structure 200 is connected with the first bolt hole 310, thereby realizing the connection between the blade brake structure 200 and the variable pitch bearing 300.
[0062] In this case, as shown in Figure 1 , Figure 4 and Figure 5 , the blade brake structure 200 can further comprise a plug-in member 220, the plug-in member 220 is arranged on the brake support 210, and the plug-in member 220 is used to be inserted into the first bolt hole 310. Avoiding the blade 400 from rotating relative to the variable pitch bearing 300.
[0063] The plug-in member 220 includes but is not limited to a plug-in pin, and the plug-in member 220 can also be a bolt and the like.
[0064] In the specific application process, the blade brake structure 200 is installed into the first bolt hole 310 on the inner ring of the variable pitch bearing 300 through the connector 220, the brake top screw is screwed, the brake pad 230 is tightly pressed at the root of the blade 400, and the rotation of the blade 400 is limited through the friction between the brake pad 230 and the blade 400.
[0065] Of course, the blade brake structure 200 can also be installed on the hanging beam 100. For example, the blade brake structure 200 is welded on the hanging beam 100 or is fixed on the hanging beam 100 through a connecting piece such as a bolt.
[0066] The method for replacing the variable pitch bearing 300 and the blade 400 of an embodiment of the utility model is introduced in detail below and comprises the following steps.
[0067] First step: the parts of the lifting appliance are carried into the hub, and the hanging beam 100 is assembled in the hub.
[0068] Second step: the first bolts connecting the variable pitch bearing 300 and the hub are disassembled, and the blade brake structure 200 is installed.
[0069] Third step: the first bolts (for example, 6 to 8 first bolts) connecting the variable pitch bearing 300 and the hub are disassembled again, and the third bolts prepared in advance are installed as limiting protection. The third bolts are used to connect the variable pitch bearing 300 and the hub through the first bolt holes 310, replacing the original first bolts. The third bolts are long bolts, which are at least 100 mm longer than the first bolts.
[0070] Fourth step: the remaining first bolts connecting the variable pitch bearing 300 and the hub are slowly and evenly disassembled, the blade 400 and the variable pitch bearing 300 are separated from the hub under the action of gravity, the remaining first bolts connecting the variable pitch bearing 300 and the hub are disassembled after the variable pitch bearing 300 and the blade 400 fall on the third bolts, at this time, the variable pitch bearing 300 and the hub are at least 100 mm apart, and a certain assembly space is provided between the two.
[0071] Fifth step: the lifting appliance is installed at the first bolt hole 310 on the inner ring of the variable pitch bearing 300. Specifically, the second bolt can be used to pass through the second bolt hole 1121 of the lifting appliance and the first bolt hole 310 of the variable pitch bearing 300, and then the nut is screwed on the second bolt in the above-mentioned assembly space, so that the lifting appliance is fixed on the variable pitch bearing 300. The winch is used to lift the variable pitch bearing 300 and the blade 400 of the variable pitch bearing 300 upwards, and the third bolt is disassembled.
[0072] Sixth step: the blade 400 and the variable pitch bearing 300 are lifted together to the tower bottom, and the variable pitch bearing 300 or the blade 400 is repaired and replaced at the tower bottom.
[0073] Step 7: hoist the pitch bearing 300 and the blade 400 along the same path to the tower to complete the replacement of the pitch bearing 300 and the blade 400 connected thereto.
[0074] Although the embodiments of the present application have been described in detail above, various modifications and changes can be made to the embodiments of the present application by those skilled in the art without departing from the spirit and scope of the present application. It should be understood that these modifications and changes will still fall within the spirit and scope of the embodiments of the present application defined by the claims.
Claims
1. A spreader for hoisting a pitch bearing (300) and a blade (400) of a wind turbine generator system, characterized in that, The lifting tool comprises: a lifting beam (100) configured to be connected with the variable pitch bearing (300) to lift the blade (400) connected with the variable pitch bearing (300) through the variable pitch bearing (300).
2. The spreader of claim 1, characterized in that The variable pitch bearing (300) has a plurality of first bolt holes (310) for connecting the hub of the wind turbine generator set; The lifting beam (100) comprises a support beam (110) configured to be connected with at least two of the plurality of first bolt holes (310) and a lifting connecting portion (120) disposed on the support beam (110) and configured to be connected with a lifting rope of a lifting device.
3. The spreader of claim 2, wherein Second bolt holes (1121) are disposed on the support beam (110) and are distributed opposite to and in communication with the first bolt holes (310) so that bolts pass through the first bolt holes (310) and the second bolt holes (1121).
4. The spreader of claim 2, wherein The support beam (110) comprises: a central support (111) on which the lifting connecting portion (120) is disposed; at least two support beams (112) circumferentially spaced around the central support (111), and each end of each support beam (112) away from the central support (111) is configured to be connected with the variable pitch bearing (300).
5. The spreader of claim 4, wherein The support beam (110) has an axisymmetric structure.
6. The spreader of claim 1, wherein The lifting tool further comprises: a blade brake structure (200) configured to be connected with the variable pitch bearing (300) or the lifting beam (100), and the blade brake structure (200) is capable of closely abutting an inner wall of the blade (400) to limit rotation of the blade (400).
7. The spreader of claim 6, wherein The variable pitch bearing (300) has a plurality of first bolt holes (310) for connecting the hub of the wind turbine generator set, and the blade brake structure (200) is capable of being connected with several of the plurality of first bolt holes (310).
8. The spreader of claim 7, wherein The blade brake structure (200) comprises: a brake support (210); a plug-in piece (220) disposed on the brake support (210) and configured to be inserted into the first bolt hole (310); a brake pad (230) configured to contact the inner wall of the blade (400); a pressing piece (240) connecting the brake support (210) and the brake pad (230) and configured to press the brake pad (230) against the inner wall of the blade (400).
9. The spreader of claim 8, wherein, The plug-in piece (220) is a latch or a bolt; and / or A surface of the brake pad (230) is provided with an elastic pad, and the brake pad (230) contacts the blade (400) through the elastic pad; and / or The pressing piece (240) is a brake jack.
10. The spreader of claim 6, wherein The number of the blade brake structures (200) is a plurality, and the blade brake structures (200) are circumferentially spaced around the variable pitch bearing (300).