A fan casing crane

Abstract

The application discloses a fan nacelle crane and relates to the technical field of crane equipment. A movable main beam is arranged on two nacelle tracks of the fan, and the movable main beam can move along the nacelle tracks through a first driving device. A chain type lifting mechanism is arranged on the movable main beam, and the chain type lifting mechanism can move along the movable main beam through a second driving device. The first driving device and the second driving device both comprise an electric driving assembly and a manual driving assembly. The second driving device and the first driving device are arranged in the application, so that manual and electric driving can be satisfied, and the manual driving equipment can be used to keep the operation when power failure or motor failure occurs.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of crane equipment, and particularly relates to a fan cabin crane. BACKGROUND

[0002] The fan cabin crane is used in the process of replacing and maintaining the internal parts of the cabin, and is mainly used for lowering the required materials from the fan cabin hoist hole to the ground or hoisting the materials from the ground to the cabin, and moving in the cabin to hoist the materials to the appropriate position.

[0003] When the existing fan cabin crane cannot normally operate in the case of sudden power failure or drive motor damage, the materials suspended in the air cannot be hoisted to the appropriate position in time, and the crane can only be operated after the power is restored. The materials suspended in the air for a long time are uncontrollable dangerous, such as the damage of the materials, the fan or the crane caused by the swinging of the fan. SUMMARY

[0004] The present application aims to provide a fan cabin crane to solve the technical problem that the crane cannot guarantee the normal operation of the equipment in the case of sudden power failure in the prior art.

[0005] The present application provides a fan cabin crane, which comprises a moving main beam arranged on two cabin tracks of the fan, the moving main beam being movable along the cabin tracks through a first driving device; a chain type lifting mechanism arranged on the moving main beam, the chain type lifting mechanism being movable along the moving main beam through a second driving device; and the first driving device and the second driving device each comprising an electric driving assembly and a manual driving assembly.

[0006] Further, the first driving device and the second driving device further comprise a moving assembly, the moving assembly comprising a mounting frame, a driving wheel and a driven wheel, the driving wheel and the driven wheel and the manual driving assembly and the electric driving assembly being arranged on the mounting frame, and the mounting frame being movable along the cabin tracks or the moving main beam through the driving wheel and the driven wheel.

[0007] Further, the manual driving assembly and the moving assembly are in meshing connection.

[0008] Further, the electric driving assembly and the moving assembly are in meshing connection or the electric driving assembly directly drives the moving assembly to rotate.

[0009] Further, the manual driving assembly comprises a manual gear, a rotating shaft and a chain wheel, the rotating shaft being arranged on the mounting frame, the chain wheel and the manual gear being arranged on the rotating shaft, the manual gear and the gear teeth on the driving wheel being in meshing connection, and a hand-pulled chain being sleeved on the chain wheel.

[0010] Further, the outer side of the chain wheel is provided with a protective cover.

[0011] Further, the electric drive assembly comprises an electric motor and an electric gear, the electric motor is fixedly arranged on the mounting frame, and the electric gear is arranged at the output end of the electric motor and is in meshing with the gear teeth.

[0012] Further, the number of teeth Z1 of the manual gear in the manual drive assembly and the number of teeth Z2 of the gear teeth satisfy the following formula relationship:

[0013]

[0014] In the formula, the meanings of the parameters are as follows: Z1, number of teeth of the manual gear; Z2, number of teeth of the gear teeth; ω, rolling friction coefficient between the driving wheel (72) and the track; k, inclination slope of the track; Q, rated load of the fan cabin crane; G, self-weight of the fan cabin crane; g, gravitational acceleration; D1, tread diameter of the driving wheel; D2, pitch circle diameter of the chain wheel; and f, pulling force of the hand-pulled chain.

[0015] Compared with the prior art, the present application has the following beneficial effects:

[0016] (1) In the present application, the second drive device and the first drive device are arranged to cooperate with each other to control the chain type lifting mechanism to move to realize hoisting work, and when the equipment cannot normally operate due to an emergency, the equipment can continue to operate through the manual drive assembly, thereby preventing the material from being suspended in the air for a long time and causing uncontrollable danger.

[0017] (2) Through the design of the ratio of the number of teeth Z2 of the gear teeth and the number of teeth Z1 of the manual gear, the manual pulling force required is saved, the transmission process is smooth, and the stable operation of the manual drive assembly is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the following specific embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0019] Fig. 1 It is a schematic diagram of the present application in the electric state;

[0020] Fig. 2 It is a schematic diagram of the present application in the manual state;

[0021] Fig. 3 It is a front view of the second drive device in the present application;

[0022] Fig. 4 Fig. 2 is a schematic view of the hand-pulled chain when the second driving device is hung.

[0023] Reference signs:

[0024] nacelle rail 1, moving main beam 2, first driving device 3, second driving device 4, chain lifting mechanism 5, cable slide assembly 6, moving assembly 7, mounting frame 71, driving wheel 72, driven wheel 73, gear tooth 74, protective shell 75, manual driving assembly 8, manual gear 81, rotating shaft 82, sprocket 83, hand-pulled chain 84, protective cover 85, electric driving assembly 9, electric motor 91, electric gear 92. DETAILED DESCRIPTION

[0025] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments.

[0026] The components of the embodiments of the present application generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the present application.

[0027] Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application.

[0028] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0030] The following is combined with Figs. 1 to 4 As shown, this embodiment of the invention provides a wind turbine nacelle crane, including a movable main beam 2 and two nacelle tracks 1. The two ends of the movable main beam 2 are provided with a first drive device 3 that can move along the nacelle tracks 1. The bottom of the movable main beam 2 is provided with a second drive device 4. The second drive device 4 and the first drive device 3 have the same structure. A chain lifting mechanism 5 is installed on the second drive device 4. The chain lifting mechanism 5 includes a chain hoist, a chain and a hook, and a cable slide assembly 6. The cable slide assembly 6 includes a cable, a trolley and a sliding track.

[0031] In this invention, two first drive devices 3 cooperate to drive the moving main beam 2 to move longitudinally on the cabin tracks 1 on both sides. A second drive device 4 drives the chain lifting mechanism 5 to move laterally on the moving main beam 2. During operation, the chain lifting mechanism 5 is controlled to move in multiple directions by the cooperation of the second drive device 4 and the first drive device 3, so that it can move to a designated position for lifting operations. The chain elevator in the chain lifting mechanism 5 drives the chain and hook to lift and release materials. The trolley and sliding rail in the cable slide assembly 6 can follow the moving main beam 2 to move on the cabin tracks 1, and the cable continuously supplies power to the various electrical appliances in the equipment.

[0032] The movable component 7 includes a mounting frame 71, a drive wheel 72, and a driven wheel 73. Both the drive wheel 72 and the driven wheel 73 are rotatably mounted on the mounting frame 71. The drive wheel 72 has teeth 74. A manual drive component 8 and an electric drive component 9 are connected to the drive wheel 72. The manual drive component 8 includes a manual gear 81, a rotating shaft 82, a sprocket 83, and a hand chain 84. The rotating shaft 82 is rotatably mounted on the mounting frame 71. The sprocket 83 and the manual gear 81 are both mounted on the rotating shaft 82. The manual gear 81 and the electric drive component 9 are connected to the drive wheel 72. The gear teeth 74 mesh with each other, and the chain 84 drives the sprocket 83 to rotate. The rotation of the sprocket 83 drives the rotating shaft 82 to rotate, and the rotation of the rotating shaft 82 drives the manual gear 81 to rotate. Since the manual gear 81 meshes with the gear teeth 74, the rotation of the manual gear 81 drives the gear teeth 74 to rotate, causing the drive wheel 72 to rotate and move left and right along the moving main beam 2. The second drive device 4 is connected to the chain lifting mechanism 5. The movement of the second drive device 4 drives the chain lifting mechanism 5 to move along the moving main beam 2, realizing the lateral movement of the chain lifting mechanism 5. In this way, the energy of the manual drive component is transmitted to the moving component, thereby driving the mounting frame to move along the cabin track or the main beam. Among them, the mounting frame 71 of the first drive device 3 is connected to the moving main beam 2, and the movement of the mounting frame 71 drives the moving main beam 2 to move along the cabin track 1; the second drive device 4 is connected to the chain lifting mechanism 5, and the movement of the mounting frame 71 drives the chain lifting mechanism 5 to move along the main beam.

[0033] The diameter of the manual gear 81 is smaller than the diameter of the sprocket 83 in this embodiment, so that the driving force required when the sprocket 83 rotates can be reduced, facilitating manual control by the staff. The diameter of the manual gear 81 is smaller than the diameter of the gear teeth 74, and the manual gear 81 and the gear teeth 74 cooperate to form a reduction gear, further saving the driving force required for manual operation while ensuring more stable operation of the gear teeth 74. The chain 84 is sleeved on the sprocket, and a protective cover 85 is arranged on the outer side of the sprocket 83. A protective shell 75 is arranged on the mounting frame 71, covering the linkage area of the driving wheel 72, the manual driving assembly 8 and the electric driving assembly 9.

[0034] The electric driving assembly 9 includes an electric motor 91, an electric gear 92 and a brake. The electric motor 91 is fixedly arranged on the mounting frame 71, and the electric motor 91 is connected with the brake. The electric gear 92 is arranged on the output end of the electric motor 91 and is in mesh with the gear teeth 74. The diameter of the electric gear 92 is smaller than the diameter of the gear teeth 74. A reduction mechanism can also be arranged between the electric motor 91 and the gear teeth 74 according to the overall weight ratio of the device, so that a smaller electric motor can be used to drive the driving wheel 72 to operate stably. In this application, a control handle is connected with the electric motor 91, and the staff can control the forward and reverse operation of the electric motor 91 through the handle, so that the device can operate according to the staff's needs. The control handle can be connected with the electric motor by wire or wirelessly.

[0035] The left and right movement of the moving beam 2 can be realized by electric or manual mode, and the specific implementation mode is as follows: the second driving device 4 includes a moving assembly 7 capable of moving the moving beam 2, a manual driving assembly 8 and an electric driving assembly 9. The moving assembly 7 is arranged on the moving beam 2, and the manual driving assembly 8 and the electric driving assembly 9 are arranged on the moving assembly 7 in a spaced manner and are in transmission connection with the moving assembly 7. In the electric mode, the moving assembly 7 can be driven to move by the electric driving assembly 9. When the power is off or the electric driving assembly fails to operate, the brake is connected with the motor, and the brake is released manually to release the constraint of the brake on the motor driving wheel, and then the motor driving wheel is driven by the manual driving assembly 8.

[0036] The left and right movement of the moving beam 2 can be realized by electric or manual mode, and the specific implementation mode is as follows: the second driving device 4 includes a moving assembly 7 capable of moving the moving beam 2, a manual driving assembly 8 and an electric driving assembly 9. The moving assembly 7 is arranged on the moving beam 2, and the manual driving assembly 8 and the electric driving assembly 9 are arranged on the moving assembly 7 in a spaced manner and are in transmission connection with the moving assembly 7. In the electric mode, the moving assembly 7 can be driven to move by the electric driving assembly 9. When the power is off or the electric driving assembly fails to operate, the brake is connected with the motor, and the brake is released manually to release the constraint of the brake on the motor driving wheel, and then the motor driving wheel is driven by the manual driving assembly 8.

[0037] In one embodiment, the number of teeth Z1 of the manual gear 81 in the manual driving assembly 8 and the number of teeth Z2 of the gear teeth 74 satisfy the following proportional relationship

[0038]

[0039] In the formula, the meanings of the respective parameters are as follows: Z1: number of teeth of the manual gear 81; Z2: number of teeth of the gear teeth 74; ω: rolling friction coefficient between the driving wheel 72 and the track; k: inclination slope of the track; Q: rated load of the fan cabin crane; G: self-weight of the fan cabin crane (mainly the self-weight of the electric hoist and the chain); g: acceleration of gravity; D1: tread diameter of the driving wheel 72; D2: pitch circle diameter of the sprocket 83; and f: pulling force of the hand-pulled chain 84. The inclination slope of the track is the ratio of the height difference between the two ends of the track to the length of the horizontal plane.

[0040] Through the above relationship, the manual driving assembly can be driven to work by a smaller pulling force. The specific reasons are as follows:

[0041] Generally, the self-weight G of the fan cabin crane, the rated load Q of the fan cabin crane, the tread diameter D1 of the driving wheel 72, the pitch circle diameter D2 of the sprocket 83, the rolling friction coefficient ω between the driving wheel 72 and the track, and the inclination slope k of the track, as well as the pulling force f that the worker can exert on the hand-pulled chain 84, i.e., the pulling force required for manual driving, are known values.

[0042] The running friction resistance calculation formula is:

[0043] F1 = (Q + G)gω (1)

[0045] In formula (1), g is the acceleration of gravity, and ω is the rolling friction coefficient between the driving wheel 72 and the track.

[0046] The slope resistance is:

[0047] F2 = (Q + G)g×k (2)

[0049] In formula (2), k is the inclination slope of the track.

[0050] Therefore, the running static resistance is:

[0051] F = F1 + F2 (3)

[0053] At this time, the torque generated by the driving wheel 72 is:

[0054]

[0055] The torque of the gear teeth 74 is:

[0056]

[0057] According to the torque-tooth number relationship formula of the two gears:

[0058] M x Z1 = M' x Z2 (6)

[0060] The gear ratio of the manual gear 81 and the gear tooth 74 can be calculated by combining the above formulas (1)-(6) and should satisfy the following formula:

[0061]

[0062] As can be seen from the above formula, the ratio of Z2 to Z1 is inversely proportional to f. According to the pulling force that can be provided by the worker and the parameters of each component in the manual driving assembly, the specific calculation formula of the gear ratio of the manual gear 81 and the gear tooth 74 is given, that is, by designing the gear ratio of the gear tooth 74 and the manual gear 81, the normal work of the manual driving assembly is ensured within the range of the pulling force that can be provided by the worker.

[0063] Based on the above reasoning, an actual use data is given:

[0064] For the hand-pulled chain, the self-weight of the fan cabin crane is selected: G = 280 kg, the rated load of the fan cabin crane is selected: Q = 1000 kg. The pulling force f of the hand-pulled chain 84 is set to 143 N, the tread diameter of the driving wheel 72 (the tread of the driving wheel 72 is the contact part with the top surface of the rail) is D1 = 100 mm, the pitch circle diameter of the sprocket 83 (the reference diameter of the sprocket 83) is D2 = 135 mm, the rolling friction coefficient between the driving wheel 72 and the rail is ω = 0.02, and the inclination slope k of the rail is 5 ‰.

[0065] When calculating the relationship between the gear ratio of the first driving device 3 and the pulling force f, the moving track of the first driving device 3 is the cabin track, then ω is the rolling friction coefficient between the driving wheel 72 and the cabin track, and k is the inclination slope of the cabin track; When calculating the relationship between the gear ratio of the second driving device 4 and the pulling force f, the moving track of the second driving device 4 is the moving main beam, then ω is the rolling friction coefficient between the driving wheel 72 and the moving main beam, and k is the inclination slope of the moving main beam.

[0066] Through the above formula, the relationship between the gear tooth 74 and the manual gear 81 can be calculated, that is:

[0067]

[0068] That is to say, in the manual driving assembly defined by the above parameters, the gear with the gear ratio (i.e. speed ratio) of about 1.624, such as Z2=31 and the manual gear with the gear number Z1=19, is selected, so that the small pulling force can be used to complete the manual moving work of the materials.

[0069] In another embodiment, the application can also be provided with a plurality of positioning grooves on the moving girder 2 and the cabin track 1, and by providing corresponding catches on the second driving device 4 and the first driving device 3, when the equipment is stopped for a long time, the catches on the second driving device 4 and the first driving device 3 can be inserted into the positioning grooves for fixation, so as to ensure the safety and stability of the equipment in the non-working state.

[0070] When the electric driving is needed during the operation, the electric gear 92 is operated by the electric motor 91, the electric gear 92 is engaged with the gear teeth 74, so that the driving wheel 72 can move on the moving girder 2 or the cabin track 1, at this time, in order to ensure the smooth operation of the equipment, the hand-pulled chain 84 is taken out from the sprocket, so as to prevent the hand-pulled chain 84 from continuously rotating during the operation of the equipment, which may cause safety hazards; when the manual driving is needed, the hand-pulled chain 84 is sleeved on the sprocket, and the protective cover 85 is installed, so as to prevent the hand-pulled chain 84 from falling off or being stuck during the operation, which may cause the equipment to be locked, at this time, the operator can pull the hand-pulled chain 84 according to the position to be moved, the sprocket is rotated by the hand-pulled chain 84, the power is transmitted to the manual gear 81, the manual gear 81 is engaged with the gear teeth 74, so that the driving wheel 72 can move on the moving girder 2 or the cabin track 1.

[0071] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the application, but not to limit them; although the application has been described in detail with reference to the above embodiments, those skilled in the art should understand that: they can still modify the technical solutions recorded in the above embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the application.

Claims

1. A wind turbine nacelle crane, characterized in that, include: The movable main beam (2) and the cable slide assembly (6) are installed on the two nacelle tracks (1) of the wind turbine. The movable main beam (2) can be moved along the nacelle track (1) by a first drive device (3). The cable slide assembly (6) supplies power to the first drive device (3). The chain lifting mechanism (5) is installed on the moving main beam (2), and the chain lifting mechanism (5) can be moved along the moving main beam (2) by the second driving device (4); The first drive device (3) and the second drive device (4) both include a moving component (7), an electric drive component (9) and a manual drive component (8); The manual drive component (8) and the moving component (7) are connected by meshing; The moving component (7) includes a mounting frame (71), a drive wheel (72), and a driven wheel (73); wherein the drive wheel (72), the driven wheel (73), the manual drive component (8), and the electric drive component (9) are all mounted on the mounting frame (71), and the mounting frame (71) can move along the cabin track (1) or the moving main beam (2) via the drive wheel (72) and the driven wheel (73); The manual drive assembly (8) includes a manual gear (81), a rotating shaft (82), and a sprocket (83). The rotating shaft (82) is mounted on the mounting bracket (71). The sprocket (83) and the manual gear (81) are both mounted on the rotating shaft (82). The manual gear (81) meshes with the teeth (74) on the drive wheel (72). A hand chain (84) is fitted on the sprocket (83). The number of teeth Z1 of the manual gear (81) in the manual drive assembly (8) and the number of teeth Z2 of the gear teeth (74) satisfy the following formula relationship: In the formula, the meanings of each parameter are as follows: Z1: number of teeth of manual gear (81); Z2: number of teeth of gear (74); ω: rolling friction coefficient between drive wheel (72) and track; k: track inclination slope; Q: rated load of wind turbine nacelle crane; G: self-weight of wind turbine nacelle crane; g: gravitational acceleration; D1: tread diameter of drive wheel (72); D2: pitch circle diameter of sprocket (83); f: pulling force of hand chain (84).

2. The wind turbine nacelle crane according to claim 1, characterized in that, The electric drive assembly (9) is connected to the moving assembly (7) by meshing, or the electric drive assembly (9) directly drives the moving assembly (7) to rotate.

3. The wind turbine nacelle crane according to claim 1, characterized in that, The sprocket (83) is provided with a protective cover (85) on its outer side.

4. A wind turbine nacelle crane according to claim 2, characterized in that, The electric drive assembly (9) includes a motor (91) and an electric gear (92). The motor (91) is fixedly mounted on the mounting bracket (71), and the electric gear (92) is located at the output end of the motor (91) and meshes with the gear teeth (74).

Images