Backpack frame for lifting device, lifting device and wind driven generator

Abstract

The invention relates to the technical field of wind power, and provides a backpack frame for a lifting device, the lifting device and a wind driven generator. The backpack frame comprises a supporting assembly, a driving assembly and a guide wheel assembly, and the driving assembly and the guide wheel assembly are arranged at the corresponding positions of the supporting assembly correspondingly; the driving assembly and the guide wheel assembly are used for ascending and descending along the rack crawling ladder, and the supporting assembly is used for installing a lift car. The knapsack frame provided by the invention is used for overcoming the defect that the interface of the lift car needs to be synchronously updated when the lift car is replaced in the prior art, and the driving assembly and the guide wheel assembly are arranged on the supporting assembly, so that when the knapsack frame is used for mounting the lift car, the lift car does not need to be specially provided with the interface for mounting the driving assembly and the guide wheel assembly; and therefore, the interface of the replaced lift car does not need to be reinforced, and the cost of the lifting device in the aspects of production, maintenance and the like can be effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of wind power, and in particular to a backpack frame for a lifting device, a lifting device and a wind generator. Background Art

[0002] In the field of wind power, rack and pinion elevators are a type of vertical transportation equipment commonly used in wind turbine towers. The drive assembly and guide wheel assembly of existing rack and pinion elevators are generally directly installed on the car, so the interface of the car (used to install components such as the drive assembly and guide wheel assembly) needs to be strengthened.

[0003] There are platforms for different purposes inside the wind turbine tower, and the positions of these platforms are mostly inconsistent. In order to adapt to these platforms, the reserved operating channel sizes and door opening directions of the elevators are not unified, which results in the need to adopt and replace cars with different structures for different platforms; however, to replace the car, it is necessary to constantly and synchronously update the car interface, which puts great pressure on the production and use of rack and pinion elevators. Summary of the invention

[0004] The first aspect of the present invention provides a backpack frame for a lifting device, which is used to solve the defect in the prior art that the car interface needs to be updated simultaneously when the car is replaced. By arranging the drive assembly and the guide wheel assembly on the support assembly, when the backpack frame is used to install the car, the car does not need to be specially provided with an interface for installing the drive assembly and the guide wheel assembly, and thus there is no need to strengthen the interface of the replaced car, which can effectively reduce the cost of the lifting device in production and maintenance.

[0005] A second aspect of the present invention provides a lifting device.

[0006] A third aspect of the present invention provides a wind turbine.

[0007] The backpack rack for a lifting device provided by the present invention comprises a support assembly, a drive assembly and a guide wheel assembly, wherein the drive assembly and the guide wheel assembly are respectively arranged at corresponding positions of the support assembly, the drive assembly and the guide wheel assembly are used for performing lifting and lowering movements along a rack ladder, and the support assembly is used for installing a car.

[0008] According to the backpack rack for a lifting device provided by the present invention, the support assembly includes a first support component and a second support component, the second support component is vertically arranged at the lower end of the first support component and extends in a direction away from the first support component; The driving assembly and the guide wheel assembly are respectively arranged at corresponding positions of the first supporting component, and the first supporting component and the second supporting component jointly form a mounting portion, and the mounting portion is used to mount the car.

[0009] According to the backpack rack for the lifting device provided by the present invention, the second supporting component comprises a second supporting frame, a bottom plate and a buffer, and the second supporting frame is vertically arranged at the lower end of the first supporting component and extends in a direction away from the first supporting component; The bottom plate is arranged above the second supporting frame, and the bottom plate is used to form the mounting portion; the buffer member is arranged between the bottom plate and the second supporting frame.

[0010] According to the backpack frame for a lifting device provided by the present invention, the first supporting component is detachably connected to the second supporting component.

[0011] The backpack rack for the lifting device provided in accordance with the present invention further includes a lubrication assembly, which is arranged on the supporting assembly and located above the driving assembly, and is used to lubricate the rack of the rack ladder.

[0012] According to the backpack frame for a lifting device provided by the present invention, the lubrication assembly comprises: A lubrication pump, provided on the support assembly, and used for pumping lubrication oil; An oil pipe connected to the output end of the lubrication pump, the oil pipe being used to transport lubricating oil; A felt wheel is arranged on the supporting assembly and is located directly above the driving gear of the driving assembly; the felt wheel is connected to the output end of the oil pipe, and the felt wheel is used to lubricate the rack of the rack ladder.

[0013] According to the backpack frame for the lifting device provided by the present invention, the walking surface of the felt wheel is evenly spaced with a plurality of oil outlet holes, and each of the oil outlet holes is connected to the output end of the oil pipe.

[0014] The backpack frame for the lifting device provided in accordance with the present invention also includes an oil collecting assembly, which includes an oil collecting box and a scraper. The oil collecting box is arranged on the supporting assembly, and the opening of the oil collecting box is located directly below the driving gear of the driving assembly. The scraper is arranged at the opening of the oil collecting box, and the scraper is used to scrape the lubricating oil on the rack of the rack ladder into the oil collecting box.

[0015] According to the backpack rack for a lifting device provided by the present invention, the driving assembly includes a driving component, a driving motor and a centrifugal speed limiter, one end of the centrifugal speed limiter is connected to the driving motor, and the other end is connected to the driving component, and the driving component is used to perform lifting and lowering movements along the rack ladder.

[0016] The lifting device provided by the present invention comprises a car and any one of the backpack racks described above, wherein the car is arranged on the backpack rack, and the backpack rack is used for performing lifting and lowering movements along a rack ladder.

[0017] The wind turbine provided by the present invention comprises a tower, a rack ladder, and a limiting base. The aforementioned lifting device, wherein the rack ladder is arranged on the tower and extends along the height direction of the tower, and the lifting device is used to perform lifting and lowering motion along the rack ladder; The limiting base is arranged at the bottom of the tower and is located directly below the lifting device. When the lifting device is parked on the limiting base, the limiting base is used to limit the radial movement of the lifting device.

[0018] In the backpack frame for the lifting device provided by the embodiment of the present invention, by setting the drive assembly and the guide wheel assembly on the support assembly, when the backpack frame is used to install the car, due to the existence of the backpack frame, the car does not need to be specially provided with an interface for installing the drive assembly and the guide wheel assembly; in this way, when facing different platforms, even if the car with different structures is replaced, it is not necessary to strengthen the interface of the replaced car, and the car can be simply installed on the support assembly. This setting method allows a backpack frame to match multiple cars with different structures, which can effectively reduce the cost of the lifting device in production and maintenance while meeting the use requirements of different platforms, and can also reduce the difficulty of car replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is an axial schematic diagram of a backpack frame provided by an embodiment of the present invention.

[0021] Figure 2 It is a schematic diagram of the partial structure of the second supporting component provided in an embodiment of the present invention.

[0022] Figure 3 yes Figure 2 A magnified schematic diagram of the local structure.

[0023] Figure 4 It is a schematic diagram of the structure of the first supporting frame and the second supporting frame provided in an embodiment of the present invention.

[0024] Figure 5 It is an axial schematic diagram of a lubrication assembly provided in an embodiment of the present invention.

[0025] Figure 6 It is a schematic diagram of the structure of the felt wheel provided in an embodiment of the present invention.

[0026] Figure 7 It is a schematic diagram of the structure of the oil collecting assembly provided in an embodiment of the present invention.

[0027] Figure 8 It is a schematic diagram of the structure of a scraper provided in an embodiment of the present invention.

[0028] Fig. 9 It is a schematic structural diagram of a guide wheel assembly provided in an embodiment of the present invention.

[0029] Fig.10 It is a structural schematic diagram of a lifting device provided in an embodiment of the present invention.

[0030] Fig.11 It is a schematic diagram of the structure of a limiting base provided in an embodiment of the present invention.

[0031] Reference numerals: 10: backpack rack; 20: elevator car; 30: rack ladder; 40: limit base; 41: limit boss; 50: upper contour limit structure; 60: lower contour limit structure; 100: support assembly; 110: first support member; 111: first support frame; 112: upper drive plate; 113: lower drive plate; 120: second support member; 121: second support frame; 122: bottom plate; 123: buffer; 124: weighing sensor; 125: reinforcement plate; 126: limit sleeve; 130: mounting portion; 200: driving assembly; 210: driving component; 211: driving gear; 220: driving motor; 230: centrifugal speed limiter; 300: guide wheel assembly; 310: guide wheel support; 320: fixed guide wheel group; 330: floating guide wheel group; 400: lubrication assembly; 410: lubrication pump; 420: oil pipe; 430: felt wheel; 431: oil outlet hole; 500: oil collecting assembly; 510: oil collecting box; 520: scraper; 530: connecting plate; 600: eccentric wheel assembly. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0034] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0035] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0036] Figure 1 It is an axial schematic diagram of a backpack frame provided by an embodiment of the present invention.

[0037] See also Figure 1A first aspect of an embodiment of the present invention provides a backpack frame 10 for a lifting device. For ease of explanation, the backpack frame 10 is referred to herein as a short form. The backpack frame 10 includes a support assembly 100, a drive assembly 200 and a guide wheel assembly 300. The drive assembly 200 and the guide wheel assembly 300 are respectively arranged at corresponding positions on one side of the support assembly 100, and the other side of the support assembly 100 is used to install a car 20; the drive assembly 200 and the guide wheel assembly 300 are matched with a rack ladder 30, and the drive assembly 200 and the guide wheel assembly 300 are used to perform lifting and lowering movements along the rack ladder 30. This article takes the backpack frame 10 as an example in which two groups of drive assemblies 200 and four groups of guide wheel assemblies 300 are arranged. The specific settings of the drive assembly 200 and the guide wheel assembly 300 can refer to the adaptive design of the prior art, and will not be repeated herein.

[0038] See also Figure 1 It can be understood that in the backpack frame 10 provided in the embodiment of the present invention, by setting the driving assembly 200 and the guide wheel assembly 300 on the support assembly 100, when the backpack frame 10 is used to install the car 20, due to the existence of the backpack frame 10, the car 20 does not need to be specially provided with an interface for installing the driving assembly 200 and the guide wheel assembly 300; in this way, when facing different platforms, even if the car 20 with different structures is replaced, it is not necessary to strengthen the interface of the replaced car 20, and the car 20 can be simply installed on the support assembly 100. This setting method allows one backpack frame 10 to match multiple cars 20 with different structures, which can effectively reduce the cost of the lifting device in production and maintenance, etc. while meeting the use requirements of different platforms, and can also reduce the difficulty of replacing the car 20.

[0039] Continue reading Figure 1 In an optional embodiment of the present invention, the support assembly 100 includes a first support component 110 and a second support component 120. The second support component 120 is vertically arranged at the lower end of the first support component 110 and extends in a direction away from the first support component 110. At the same time, the first support component 110 also extends in a direction away from the second support component 120. In other words, the support assembly 100 has an "L"-shaped structure. The drive assembly 200 and the guide wheel assembly 300 are respectively arranged at corresponding positions of the first support component 110; the first support component 110 and the second support component 120 jointly form a mounting portion 130, and the mounting portion 130 is used to mount the car 20.

[0040] Specifically, when installing the car 20, the first support component 110 can be connected to the car 20 from the side of the car 20, thereby playing a role in limiting and supporting the car 20 in the radial direction, and the second support component 120 can be connected to the car 20 from the bottom of the car 20, thereby playing a role in supporting and limiting the car 20 in the axial direction.

[0041] See also Figure 1 It can be understood that, in the backpack rack 10 provided in the embodiment of the present invention, the "L"-shaped support assembly 100 is provided, so that the entire support assembly 100 can form a stable layout in space. This structure can effectively disperse the weight of the car 20 and the torque in all directions, and provide a stable installation foundation for the drive assembly 200 and the guide wheel assembly 300, thereby ensuring the stability of the entire backpack rack 10 during the lifting movement along the rack ladder 30.

[0042] Figure 2 is a partial structural schematic diagram of a second supporting component provided in an embodiment of the present invention; Figure 3 yes Figure 2 A magnified schematic diagram of the local structure; Figure 4 It is a schematic diagram of the structure of the first supporting frame and the second supporting frame provided in an embodiment of the present invention.

[0043] See also Figure 2 , Figure 3 and Figure 4 In an optional embodiment of the present invention, the second support component 120 includes a second support frame 121, a bottom plate 122 and a buffer member 123. The second support frame 121 is welded by several components such as a longitudinal beam, a transverse beam and a limiting support sleeve; in the embodiment of the present invention, the second support frame 121 can be set to various shapes according to actual conditions. In this embodiment, a rectangular frame is taken as an example for illustration and description.

[0044] The bottom plate 122 is arranged above the second supporting frame 121 and is adapted to the shape of the second supporting frame 121. The bottom plate 122 is used to form a mounting portion 130 to facilitate the installation of the car 20. In some optional embodiments of the present invention, the bottom plate 122 can also serve as the bottom of the car 20. The buffer member 123 is arranged between the bottom plate 122 and the second supporting frame 121. The buffer member 123 is used to absorb vibration from the second supporting frame 121.

[0045] See also Figures 1 to 4 It can be understood that the rack and pinion elevator is a vertical transportation device in the tower of the wind power field. At present, the drive component 210 (reducer) and the guide wheel assembly 300 and other components are installed on the car 20. During the lifting process of the rack and pinion elevator, the meshing of the gear and the rack and the relative movement between the guide wheel assembly and the rack structure frame will generate vibrations. These vibrations are transmitted to the car 20, which will have a great impact on the passenger or cargo transportation of the car 20. In the backpack rack 10 provided by the embodiment of the present invention, a buffer 123 is provided between the second support frame 121 and the bottom plate 122. In this way, the buffer 123 can absorb the vibrations caused by the meshing of the gear and the rack and the relative movement between the guide wheel assembly and the rack structure frame, so that the impact of these vibrations on the passenger or cargo transportation of the car 20 can be effectively reduced.

[0046] Continue reading Figure 3 In an optional embodiment of the present invention, the second supporting component 120 further includes four reinforcing plates 125 and four weighing sensors 124. The four reinforcing plates 125 and the four weighing sensors 124 are respectively arranged at the four diagonals of the bottom plate 122 and are located between the bottom plate 122 and the second supporting frame 121. During assembly, the fasteners pass through the bottom plate 122, the reinforcing plates 125, the buffer 123 and the weighing sensors 124 in sequence and are fixed to the second supporting frame 121. The reinforcing plates 125 are used to connect the bottom plate 122 and the buffer 123. The weighing sensors 124 are used to measure the deadweight of the car 20 and the load of the car 20 to avoid overloading. The specific settings of the reinforcing plates 125 and the weighing sensors 124 can refer to the prior art and will not be repeated herein.

[0047] Continue reading Figure 4 In an optional embodiment of the present invention, the second support component 120 is detachably connected to the first support component 110, and there are various ways of detachable connection, such as plug-in, snap-on, and fastener connection. It can be understood that during transportation, the first support component 110 and the second support component 120 can be separated based on the detachable connection, so that the space occupied by the backpack frame 10 can be effectively reduced, thereby reducing the difficulty of transportation.

[0048] It is also understandable that manufacturing errors are inevitable in the existing production and manufacturing process, such as welding deformation and other problems, which will cause problems with the verticality between the first support component 110 and the second support component 120, and thus cause the backpack frame 10 to be incompatible with the car 20; the backpack frame 10 provided in the embodiment of the present invention, during the assembly process, since the first support component 110 and the second support component 120 are detachably connected, the verticality between the first support component 110 and the second support component 120 can be adjusted during the connection, so that the installation compatibility of the first support component 110 and the second support component 120 with the car 20 can be improved, and the difficulty of processing and manufacturing the backpack frame 10 can also be reduced.

[0049] See also Figure 1 and Figure 4 In an optional embodiment of the present invention, the first supporting component 110 includes a first supporting frame 111 and two driving plates. The first supporting frame 111 includes two vertical beams. The two vertical beams are relatively spaced apart. The two driving plates are relatively spaced apart between the two vertical beams. Each driving plate can be individually provided with a driving assembly 200 and two guide wheel assemblies 300. The vertical beams are used to form the aforementioned mounting portion 130 to facilitate the installation of the car 20. For the convenience of distinction in the following text, this article divides the two driving plates into an upper driving plate 112 and a lower driving plate 113 according to the upper and lower positions.

[0050] Continue reading Figure 4 In an optional embodiment of the present invention, the upper driving plate 112 and the lower driving plate 113 can be set as a bending structure, and the protruding portion is directed toward the side away from the second supporting component 120. It can be understood that such a setting is conducive to the layout of the driving motor 220, and can make the overall structure of the driving device and the first supporting component 110 more compact, thereby improving space utilization.

[0051] Figure 5 It is an axial schematic diagram of a lubrication assembly provided in an embodiment of the present invention.

[0052] See also Figure 1 and Figure 5 In an optional embodiment of the present invention, the backpack frame 10 further includes a lubrication assembly 400, which is disposed on the upper drive plate 112 and is located directly above the drive gear 211 of the drive assembly 200; when the backpack frame 10 and the rack ladder 30 are assembled, the lubrication assembly 400 can apply lubricating oil to the rack above the drive gear 211, and when the drive gear 211 moves to the lubricated rack, the drive gear 211 will also adhere to the lubricating oil, thereby playing a role in lubricating the meshing surface.

[0053] It is understandable that the lubrication of the elevator gear rack in the existing fan requires manual application, which has low efficiency and poses great safety hazards during the climbing and application process. The lubrication component 400 provided in the embodiment of the present invention can realize automatic lubrication of the rack and the drive gear 211, solving the problem of low efficiency of manual application and reducing safety risks.

[0054] Continue reading Figure 5 In an optional embodiment of the present invention, the lubrication assembly 400 includes a lubrication pump 410, an oil pipe 420 and a felt wheel 430. The lubrication pump 410 is disposed on the first support component 110 through a mounting seat and is located above the drive assembly 200. The lubrication pump 410 is fixed to the mounting seat with fasteners. The lubrication pump 410 is used to store and pump lubricating oil.

[0055] The oil pipe 420 is connected to the output end of the lubrication pump 410, and the oil pipe 420 is used to transport the lubricating oil pumped by the lubrication pump 410; the oil pipe 420 can be a hard pipe or a soft pipe; the felt wheel 430 is fixed to the first support component 110 through a mounting seat, and is located directly above the driving gear 211 of the driving assembly 200, and the felt wheel 430 can roll along the rack, and the felt wheel 430 is connected to the output end of the oil pipe 420. After receiving the lubricating oil, the felt wheel 430 can fully absorb the lubricating oil and serve as a coating medium to apply the lubricating oil to the rack.

[0056] See also Figure 5It can be understood that in the backpack frame 10 provided in the embodiment of the present invention, the lubrication pump 410 supplies oil, the oil pipe 420 delivers oil, and the felt wheel 430 applies oil. The three can form a complete automatic oil supply system, which can fully ensure the lubrication of the rack, thereby solving the problem of low efficiency of manual application and reducing safety risks.

[0057] Among them, preferably, the shape of the felt wheel 430 is set to be a gear shape that matches the rack, so that the felt wheel 430 can engage with the gear, thereby making the contact area between the two larger and ensuring the coating of the rack groove.

[0058] Figure 6 It is a schematic diagram of the structure of the felt wheel provided in an embodiment of the present invention.

[0059] See also Figure 6 In an optional embodiment of the present invention, a plurality of oil outlet holes 431 are evenly spaced on the walking surface of the felt wheel 430, and each oil outlet hole 431 is connected to the output end of the oil pipe 420; it can be understood that by providing a plurality of oil outlet holes 431, the flowing lubricating oil directly flowing out of the oil outlet holes 431 can increase the lubrication area, thereby improving the application efficiency of the lubricating oil.

[0060] When the felt wheel 430 is in the shape of a gear, the oil outlet hole 431 can be set at the bottom of the tooth groove of the gear, so that the tooth groove of the rack can be fully lubricated and the lubricating oil can ensure that the gear tooth groove meshing surface is fully covered.

[0061] Figure 7 It is a schematic diagram of the structure of the oil collecting assembly provided in an embodiment of the present invention.

[0062] See also Figure 1 and Figure 7 In an optional embodiment of the present invention, the backpack frame 10 also includes an oil collecting assembly 500, which includes an oil collecting box 510, a scraper 520 and a connecting plate 530. The oil collecting box 510 is arranged on the lower driving plate 113 of the first supporting component 110 through the connecting plate 530, and the opening of the oil collecting box 510 is located directly below the driving gear 211 of the driving assembly 200. Excess lubricating oil on the rack and the gear can fall into the oil collecting box 510 from the opening of the oil collecting box 510, wherein the connecting plate 530 can cover part of the opening of the oil collecting box 510 without affecting the collection of grease, thereby avoiding grease splashing.

[0063] Figure 8 It is a schematic diagram of the structure of a scraper provided in an embodiment of the present invention.

[0064] See also Figure 7 and Figure 8The scraper 520 is arranged at the opening of the oil collecting box 510 and is located on the side of the oil collecting box 510 facing the rack. The scraper 520 is used to scrape the excess lubricating oil on the rack ladder 30 into the oil collecting box 510; preferably, the scraper 520 is a "U"-shaped scraper 520. In other words, the scraper 520 is provided with a "U"-shaped groove matching the rack. When the backpack frame 10 is combined with the rack ladder 30, the bottom wall of the groove will fit with the tooth top of the rack, and the groove walls on both sides of the groove will respectively fit with the two side surfaces of the rack. When the oil collecting assembly 500 moves with the backpack frame 10, the scraper 520 can scrape the excess lubricating oil on the rack and collect it in the oil collecting box 510.

[0065] It is understandable that due to the special operating environment in the field of wind power, especially at sea, the tower of the wind turbine will have a large swing, and then the rack ladder 30 set inside the wind turbine tower will also swing accordingly. In the above embodiment, when the driving gear 211 moves to the rack lubricated by the lubrication component 400, the meshing of the driving gear 211 and the rack will squeeze out part of the lubricating oil, and these squeezed lubricating oils will be suspended on the rack. When the rack ladder 30 swings with the tower, these suspended lubricating oils will be randomly thrown to any place inside the tower. In the long run, this will cause the environment inside the tower to deteriorate, and in severe cases, it will also affect the operation of other equipment inside the tower. The oil collection component 500 provided in the embodiment of the present invention can actively collect excess lubricating oil on the rack, which can effectively solve the problem of grease dripping and contaminating the wind turbine tower, and can improve the safety of the wind turbine tower.

[0066] Continuing to refer to 1, in an optional embodiment of the present invention, the driving assembly 200 includes a driving component 210, a driving motor 220 and a centrifugal speed limiter 230. The driving component 210 includes a driving gear 211 and a reduction gear box and other components. One end of the centrifugal speed limiter 230 is connected to the driving motor 220, and the other end is connected to the driving component 210. The driving component 210 is used to perform lifting and lowering movements along the rack ladder 30. The driving component 210 and the driving motor 220 can be set with reference to the prior art.

[0067] It is understandable that in the prior art, lifting devices generally use an anti-fall safety device to ensure the safety of the lifting device. A gear for meshing with a rack is provided inside the anti-fall safety device. Under normal conditions, this gear moves up and down along the rack with the lifting device. When the driving gear 211 fails, this gear will be stuck on the rack, thereby achieving anti-fall.

[0068] However, as shown in the figure, the lifting device is generally provided with two upper and lower driving components 210, and the driving gears 211 in the two driving components 210 will also mesh with the racks respectively. When there is an anti-fall safety device, three gears on the same straight line will mesh with the racks at the same time. Due to inevitable installation and manufacturing errors, the three gears cannot be guaranteed to be absolutely collinear, which will inevitably lead to a poor meshing state between at least one of the gears and the rack (also known as over-positioning), which will affect the lifting and lowering movement of the driving component 210 or the anti-fall work of the anti-fall safety device.

[0069] In the drive assembly 200 provided in the embodiment of the present invention, a centrifugal speed limiter 230 is provided. Thus, in unexpected circumstances, it can be ensured that the descending speed of the lifting device does not exceed a preset speed (the preset speed can be set in advance in the centrifugal speed limiter 230). This can eliminate the need for setting an anti-fall safety device, eliminate the potential safety hazard of on-site workers resetting and continuing to use the anti-fall safety device after falling, and also solve the over-positioning problem of the three gears.

[0070] Fig. 9 It is a schematic structural diagram of a guide wheel assembly provided in an embodiment of the present invention.

[0071] See also Figure 1 and Fig. 9 In an optional embodiment of the present invention, the guide wheel assembly 300 includes a guide wheel support 310, a fixed guide wheel group 320 and a floating guide wheel group 330, and the fixed guide wheel group 320 and the floating guide wheel group 330 are respectively fixed to the guide wheel support 310 by fasteners; in an optional embodiment of the present invention, as Figure 1 As shown, four groups of guide wheel assemblies 300 are provided, and the four groups of guide wheel assemblies 300 are respectively arranged on two vertical beams on both sides of the upper driving plate 112 and the lower driving plate 113 through fasteners. In an optional embodiment of the present invention, an eccentric wheel assembly 600 is also included. The eccentric wheel assembly 600 is arranged on the upper driving plate 112 and the lower driving plate 113 relative to the driving component 210. The specific designs of the guide wheel support 310, the fixed guide wheel group 320, the floating guide wheel group 330 and the eccentric wheel assembly 600 can refer to the prior art, and will not be repeated herein.

[0072] Fig.10 It is a structural schematic diagram of a lifting device provided in an embodiment of the present invention.

[0073] See also Figure 1 and Fig.10 A second aspect of an embodiment of the present invention provides a lifting device, the lifting device comprising a car 20 and a backpack frame 10 as described in any of the above embodiments, the car 20 is arranged on the backpack frame 10, and the backpack frame 10 is used to perform lifting and lowering movements along a rack ladder 30; Fig.10As shown, in an optional embodiment of the present invention, the backpack frame 10 can also be arranged in combination with the car 20, wherein the first supporting component 110 of the backpack frame 10 can be used as a part of the back plate of the car 20, and the second supporting component 120 of the backpack frame 10 can be used as a part of the bottom of the car 20. When the car 20 is replaced, the backpack frame 10 can remain unchanged, and the backpack frame 10 can be used as the assembly basis of the new car 20; it can be understood that such a configuration is conducive to the miniaturization of the lifting device and the compactness of the overall structure.

[0074] Continue reading Fig.10 In an optional embodiment of the present invention, the lifting device also includes an upper contour limiting structure 50 and a lower contour limiting structure 60, and the upper contour limiting structure 50 and the lower contour limiting structure 60 are respectively fixed to the car 20 by fasteners. It can be understood that by setting the upper contour limiting structure 50 and the lower contour limiting structure 60, on the one hand, it is beneficial to the structural compactness of the lifting device, and on the other hand, it can protect the car 20 and improve the service life of the car 20.

[0075] Fig.11 It is a schematic diagram of the structure of a limiting base provided in an embodiment of the present invention.

[0076] A third aspect of an embodiment of the present invention provides a wind turbine, which includes a tower, a rack ladder 30, a limit base 40 and the lifting device in the aforementioned embodiment, wherein the rack ladder 30 is provided on the tower and extends along the height direction of the tower, and the lifting device is used to perform lifting and lowering movements along the rack ladder 30; the limit base 40 is provided at the bottom of the tower and is located directly below the lifting device, and the limit base 40 can be used as a docking platform for the lifting device. When the lifting device is parked on the limit base 40, the limit base 40 is used to limit the radial movement of the lifting device.

[0077] Specifically, the limiting base 40 is a rectangular frame structure, which is obtained by welding a plurality of cross beams and longitudinal beams. The limiting base 40 is provided with limiting bosses 41 matching the lifting device at the four diagonal positions. When the lifting device is parked on the limiting base 40, the limiting bosses 41 can be inserted into the limiting sleeve 126 at the bottom of the lifting device (backpack frame 10). Based on the cooperation between the limiting bosses 41 and the limiting sleeves 126, the limiting base 40 can limit the movement of the lifting device along its own radial direction. In an optional embodiment of the present invention, the limiting bosses 41 can also limit the lifting device from the side of the lifting device, which can be adaptively selected according to actual conditions.

[0078] In the prior art, swinging is an inherent characteristic of wind turbines, especially offshore wind turbines. As an auxiliary equipment in the wind turbine, the lifting device will also swing accordingly. Therefore, the mutual wear between the drive gear 211 and the guide wheel assembly 300 and the rack ladder 30 in the lifting device will be very fast. Once the drive gear 211, the guide wheel assembly 300 or the rack ladder 30 is excessively worn, it can only be replaced. However, the offshore environment is relatively harsh, which greatly hinders the maintenance of the wind turbine. Therefore, the wear between the drive gear 211, the guide wheel assembly 300 and the rack has caused a great burden on the maintenance of the lifting device.

[0079] It is understandable that the lifting device will be docked on the docking platform at the bottom of the tower most of the time. In the wind turbine provided in the embodiment of the present invention, a limit base 40 is provided to limit the radial movement of the lifting device. In this way, the wear of the drive gear 211, the guide wheel assembly 300 and the rack ladder 30 can be effectively reduced, and the service life of the drive gear 211, the guide wheel assembly 300 and the rack ladder 30 can be increased, thereby effectively reducing the maintenance cost of the lifting device.

[0080] It should be noted that the technical solutions in various embodiments of the present invention can be combined with each other, but the basis for the mutual combination is that it can be implemented by ordinary technicians in the field; when the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist, that is, it does not belong to the protection scope of the present invention.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A backpack rack for a lifting device, characterized in that: The invention comprises a support assembly (100), a drive assembly (200) and a guide wheel assembly (300), wherein the drive assembly (200) and the guide wheel assembly (300) are respectively arranged at corresponding positions of the support assembly (100), the drive assembly (200) and the guide wheel assembly (300) are used for performing lifting movement along a rack ladder (30), and the support assembly (100) is used for installing a car (20).

2. The backpack rack for a lifting device according to claim 1, characterized in that: The support assembly (100) comprises a first support component (110) and a second support component (120), wherein the second support component (120) is vertically arranged at the lower end of the first support component (110) and extends in a direction away from the first support component (110); The drive assembly (200) and the guide wheel assembly (300) are respectively arranged at corresponding positions of the first support component (110); the first support component (110) and the second support component (120) together form a mounting portion (130); and the mounting portion (130) is used to mount the car (20).

3. The backpack rack for a lifting device according to claim 2, characterized in that: The second supporting component (120) comprises a second supporting frame (121), a bottom plate (122) and a buffer component (123); the second supporting frame (121) is vertically arranged at the lower end of the first supporting component (110) and extends in a direction away from the first supporting component (110); The bottom plate (122) is arranged above the second supporting frame (121), and the bottom plate (122) is used to form the mounting portion (130); the buffer member (123) is arranged between the bottom plate (122) and the second supporting frame (121).

4. The backpack frame for a lifting device according to claim 2, characterized in that: The first supporting component (110) and the second supporting component (120) are detachably connected.

5. The backpack frame for a lifting device according to claim 1, characterized in that: It also comprises a lubrication assembly (400), wherein the lubrication assembly (400) is arranged on the support assembly (100) and is located above the drive assembly (200), and the lubrication assembly (400) is used to lubricate the rack of the rack ladder (30).

6. The backpack frame for a lifting device according to claim 5, characterized in that: The lubrication assembly (400) comprises: A lubrication pump (410), provided on the support assembly (100), the lubrication pump (410) being used to pump lubrication oil; An oil pipe (420) connected to the output end of the lubrication pump (410), the oil pipe (420) being used to transport lubrication oil; A felt wheel (430) is provided on the support assembly (100) and is located directly above the drive gear (211) of the drive assembly (200); the felt wheel (430) is connected to the output end of the oil pipe (420), and the felt wheel (430) is used to lubricate the rack of the rack ladder (30).

7. The backpack frame for a lifting device according to claim 6, characterized in that: The walking surface of the felt wheel (430) is evenly spaced and provided with a plurality of oil outlet holes (431), and each of the oil outlet holes (431) is in communication with an output end of the oil pipe (420).

8. The backpack rack for a lifting device according to claim 5, characterized in that: The invention also comprises an oil collecting assembly (500), the oil collecting assembly (500) comprising an oil collecting box (510) and a scraper (520), the oil collecting box (510) being arranged on the supporting assembly (100), and the opening of the oil collecting box (510) being located directly below the driving gear (211) of the driving assembly (200), the scraper (520) being arranged at the opening of the oil collecting box (510), and the scraper (520) being used to scrape the lubricating oil on the rack of the rack ladder (30) into the oil collecting box (510).

9. The backpack frame for a lifting device according to any one of claims 1 to 8, characterized in that: The driving assembly (200) comprises a driving component (210), a driving motor (220) and a centrifugal speed limiter (230); one end of the centrifugal speed limiter (230) is connected to the driving motor (220), and the other end is connected to the driving component (210); the driving component (210) is used to perform lifting motion along the rack ladder (30).

10. A lifting device, characterized in that: The backpack frame (10) comprises a car (20) and the backpack frame (10) according to any one of claims 1 to 9, wherein the car (20) is arranged on the backpack frame (10), and the backpack frame (10) is used for performing lifting movement along a rack ladder (30).

11. A wind turbine generator, characterized in that: It comprises a tower, a rack ladder (30), a limiting base (40) and the lifting device according to claim 10, wherein the rack ladder (30) is arranged on the tower and extends along the height direction of the tower, and the lifting device is used to perform lifting and lowering movements along the rack ladder (30); The limiting base (40) is arranged at the bottom of the tower and is located directly below the lifting device. When the lifting device is parked on the limiting base (40), the limiting base (40) is used to limit the movement of the lifting device in the radial direction.

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