CN105905808A - Deflection mechanism of lifting appliance - Google Patents

Abstract

The invention discloses a yaw mechanism of a hanger, which includes a driving trolley, an arc-shaped arc track and a corresponding arc-shaped rack; the driving trolley includes a motor, a reducer, an axle, a bearing seat and a gear Shaped roller, the output end of the motor is connected with the reducer, the axle passes through the output hole of the reducer transversely, the axle and the output shaft of the reducer are at 90 degrees, and the reducer drives the axle to rotate; the toothed roller is fixed on the ends of the two ends of the axle The toothed roller includes the upper cylindrical surface of the toothed roller and the upper gear of the toothed roller, the upper cylindrical surface of the toothed roller meshes with the arc track, and the upper gear of the toothed roller meshes with the arc rack. The yaw mechanism of the sling according to the present invention is used to assist the adjustment of the attitude of the blade when the blade sling is installed and removed in the high-altitude unmanned state; the overall structure is simple and easy to use, and it is different from the existing yaw mechanism In contrast, it is not easy to get stuck due to the deflection of the center of gravity of the hanging object.

Description

Swing Mechanism of Spreader

technical field

The invention relates to a yaw mechanism, in particular to a yaw mechanism for assisting the adjustment of the attitude of the blade when the blade spreader is installed and removed in the high-altitude unmanned state, and belongs to the field of auxiliary tools for the blade spreader .

Background technique

There are two main ways to lift the wind blades, one is integral lifting suitable for small wind turbine blades hoisting, and the other is split stepwise lifting suitable for large wind turbine blades hoisting.

Since wind turbines are mostly installed in land or ocean areas with abundant wind resources, relatively large wind blades are mostly used at sea, and it is extremely inconvenient to lift or disassemble the wind blades. With the gradual increase of wind turbines and the further increase of installed capacity, there are also different technical requirements for the hoisting process and spreaders for lifting wind blades.

At present, most of the wind blade spreaders used in China are purchased from foreign products, and there are more or less inconveniences in the use process. The installation of wind turbines needs to adapt to the natural environment and use reliable hoisting equipment and spreaders. Every requirement is very strict. Among them, the wind blade spreader is an indispensable key equipment, whether it is lifting or removing wind blades or The air attitude adjustment of the wind blade needs to be completed by the wind blade spreader, so its role in the safe lifting of the wind blade is very important. The localization of wind blade spreader can reduce the cost and expand its applicability.

For example, the application number is: CN201410143354.1, and the invention name is a Chinese invention patent for a split-type installation process of offshore wind turbines, which discloses a process step for split-type installation of offshore wind turbines: first, the offshore wind power installation platform is positioned and raised to the wind turbine installation site ; Assemble the wind blades and the hub on the offshore wind power installation platform; install the internal accessories of the tower after the wind wheel is assembled; after installing the internal accessories, hoist and install the three-section tower on the jacket; hoist the nacelle to the top of the tower The upper part; the whole impeller is turned over and hoisted; the whole impeller is hoisted in place. The present invention solves the problem of separate installation of offshore and deep-sea wind power sites, cancels the need to install the whole offshore wind power equipment on the wharf first, and then transports the whole machine to the installation site for secondary installation; greatly reduces construction costs, reduces It has the advantages of simplifying the construction process, greatly reducing safety risks, and speeding up the efficiency of offshore wind turbine installation.

However, in the split-type installation process of the fan, the specific structure of the fan blade spreader is not mentioned.

Contents of the invention

The object of the present invention is to provide a yaw mechanism for a sling, which is used to adjust the posture of the sling when the sling is installed or removed in an unmanned state at high altitude; The mechanisms are fixedly connected to jointly realize the function of adjusting the attitude of the fan blades, thereby effectively solving the above-mentioned problems in the prior art.

The purpose of the present invention is achieved through the following technical solutions: a yaw mechanism of a spreader, including a driving trolley, an arc-shaped arc track and a corresponding arc-shaped rack; the driving trolley includes a motor, a reducer , axle, bearing seat and toothed roller, the output end of the motor is connected with the reducer, the axle passes through the output hole of the reducer transversely, the axle and the output shaft of the reducer form 90, and the reducer drives the axle to rotate; the toothed roller The ends fixed at the two ends of the axle; the toothed roller includes the upper cylindrical surface of the toothed roller and the upper gear of the toothed roller, the upper cylindrical surface of the toothed roller meshes with the arc track, and the upper gear of the toothed roller meshes with the arc rack.

As a preferred mode, when the motor is running, the motor drives the reducer to rotate, the output shaft of the reducer drives the axle to rotate, and the axle drives the toothed roller to rotate.

As a further preferred manner, when the toothed roller rotates, the trolley is driven to make a circular motion along the arc track, and the center of the rotation track coincides with the center of the rotor hub of the fan blade.

As a preferred manner, a vehicle frame is also included, and the speed reducer is fixed on the vehicle frame.

As a further preferred manner, two ends of the axle are respectively provided with a bearing seat, and the bearing seat is nested on the vehicle frame.

As a preferred manner, the yaw mechanism is arranged at both ends of the main beam of the fan blade spreader, and the frame of the yaw mechanism is hinged to the bracket assembly of the fan blade hanger through pin shafts.

As a further preferred manner, the arc track is fixed on the main beam by bolts.

The working principle of the present invention is as follows:

When it is necessary to realize the deflection function of the fan blade: start the motor, and the motor reducer drives the axle and the toothed roller to rotate, and drives the trolley to move through the meshing between the gear on the toothed roller and the arc-shaped rack. is the driving torque of the yaw, the cylindrical surface on the toothed roller walks out of the arc track along the arc track to complete the yaw movement of the driven trolley.

Compared with the prior art, the beneficial effect of the present invention is that the yaw mechanism of the sling according to the present invention is used to assist the adjustment of the attitude of the fan blade when the fan blade sling is installed and disassembled in the state of no one at high altitude; The structure is simple, and the use is convenient. Compared with the existing yaw mechanism, it is not easy to get stuck due to the deflection of the center of gravity of the hanging object.

Description of drawings

Fig. 1 is a schematic diagram of the positions of the yaw mechanism and the fan blade hanger bracket assembly of the present invention.

Fig. 2 is a schematic diagram of the positions of the yaw mechanism and the main beam of the blade hanger.

Fig. 3 is a schematic cross-sectional view of A-A in Fig. 2 .

Among them: yaw mechanism-101, bracket assembly of blade spreader-102, main beam of blade spreader-103, arc track-2, arc rack-3, driving trolley-4, motor-41, axle -42, bearing seat-43, toothed roller-44, vehicle frame-45, speed reducer-46, cylindrical surface-47 on the toothed roller, gear-48 on the toothed roller.

detailed description

In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

All features disclosed in this specification, or steps in all disclosed methods or processes, except for mutually exclusive characteristics and/or steps, can be combined in any way, unless otherwise stated, they can be used by other equivalent or similar Instead, each feature is intended to be replaced by alternative features, that is, each feature is only one embodiment of a series of equivalent or similar features unless stated otherwise.

Example:

As shown in Figures 1-3, the yaw mechanism of the sling according to the present invention is arranged at both ends of the main beam 103 of the fan blade sling, and plays a role in adjusting the posture of the fan blade. The vehicle frame 45 of the yaw mechanism 101 is hinged to the bracket assembly 102 of the fan blade spreader through pins, and plays the role of carrying and fixing the fan blades.

The yaw mechanism 101 includes a driving trolley 4, a circular arc-shaped track 2 and a corresponding arc-shaped rack 3; the arc-shaped track 2 is fixed on the main beam 103 by bolts.

The driving trolley 4 includes a motor 41 , a speed reducer 46 , an axle 42 , a bearing seat 43 , a toothed roller 44 and a vehicle frame 45 . The speed reducer 46 is fixed on the vehicle frame 45; the two ends of the axle 42 are respectively provided with a bearing seat 43, and the bearing seat 43 is nested on the vehicle frame 45 to play the role of supporting the bearing.

The output end of described motor 41 links to each other with speed reducer 46, and axle shaft 42 passes the output hole of speed reducer 46 transversely, and axle shaft 42 becomes 90 degrees with the output shaft of speed reducer 46, and speed reducer 46 drives axle shaft 42 to rotate; Toothed roller 44 Be fixed at the end of axle 42 two ends; Toothed roller 44 comprises toothed roller upper cylindrical surface 47 and toothed roller upper gear 48, and toothed roller upper cylindrical surface 47 meshes with arc track 2, and toothed roller upper gear 48 and The arc rack 3 meshes; when the motor 41 is running, the motor 41 drives the reducer 46 to rotate, and the output shaft of the reducer 46 drives the axle 42 to rotate, and the axle 42 drives the toothed roller 44 to rotate; when the toothed roller 44 rotates, it drives the dolly 4 Make a circular motion along the arc track 2, and the center of the circle of the rotation track coincides with the center of circle of the fan blade hub.

During the installation and disassembly of the wind blade spreader, the yaw mechanism of the present invention needs to be used:

Fan blade installation: first place the fan blade on the hoisting platform on the ground to ensure its basic balance; lift the fan blade sling, at this time the left pincer and right pincer are in the open state; move the fan blade sling to the fan blade Above, slowly lower the fan blade spreader until the fan blade clamps on the bracket components at both ends contact the fan blades and stop; the left and right pliers legs rotate until the mounting holes of the two-way lock pin mechanism installed on the pliers legs are connected to the rear lock Insert the pin nut into the installation positioning hole; the capsule starts to inflate, and stops when it reaches a certain pressure value and maintains the pressure; lift the fan blade spreader again to move the fan blade to the installation position of the rotating hub, and start the yaw mechanism to adjust the fan blade and the rotating hub The mounting holes are aligned; after manually tightening the mounting bolts of the rotating hub and the fan blade, the capsule is depressurized; the two-way lock pin mechanism is released; after the left and right pincer feet are rotated and reset; finally, the fan blade spreader can be removed to complete a fan blade installation.

Fan blade disassembly: check that the left and right pincers of the fan blade spreader are in the open state, lift the blade spreader from above the blade and slowly lower the blade spreader until the blade clamps at both ends of the blade spreader are in contact with the blades If the contact between the fan blade clamp and the fan blade is not good, you can start the yaw mechanism to adjust the posture of the fan blade spreader until the contact surface is stable and then start the next step; the left and right pliers feet rotate to the pincers installed on the pliers feet. After the installation holes of the two-way lock pin mechanism are docked, the lock pin nuts are inserted into the installation positioning holes; the capsule starts to inflate, and when it reaches a certain pressure value, it stops and maintains the pressure; after manually loosening the connecting bolts between the fan blade and the rotor hub, the fan blade crane starts to be lowered until the fan blade is placed on the fan blade hoisting platform on the ground; the capsule is depressurized; the two-way lock pin mechanism is released; the left pincer foot and the right pincer foot are rotated and reset; remove the fan blade spreader to complete a fan blade lift Disassemble.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (7)

1. The yaw mechanism of the spreader is characterized in that: it comprises a drive trolley (4), an arc-shaped arc track (2) and a corresponding arc rack (3); the drive trolley (4) Comprising motor (41), speed reducer (46), axle shaft (42), bearing block (43) and toothed roller (44), the output end of described motor (41) links to each other with speed reducer (46), and axle shaft (42 ) traverses through the output hole of the reducer (46), the axle (42) and the output shaft of the reducer (46) become 90 degrees, and the reducer (46) drives the axle (42) to rotate; the toothed roller (44) is fixed on The end of axle (42) two ends; Toothed roller (44) comprises toothed roller upper cylindrical surface (47) and toothed roller upper gear (48), and toothed roller upper cylindrical surface (47) and arc track (2 ) meshes, and the toothed roller upper gear (48) meshes with the arc rack (3). 2. The yaw mechanism of the spreader as claimed in claim 1, characterized in that: when the motor (41) is running, the motor (41) drives the speed reducer (46) to rotate, and the output shaft of the speed reducer (46) drives the axle ( 42) rotate, and axle shaft (42) drives toothed roller (44) to rotate. 3. The yaw mechanism of the spreader as claimed in claim 2, characterized in that: when the toothed roller (44) rotates, the driving trolley (4) moves in a circle along the arc track (2), and the center of the circle of the rotation track is in line with the The centers of circles of the fan blade rotating hub coincide. 4. The yaw mechanism of the spreader according to claim 1, characterized in that it further comprises a vehicle frame (45), and the speed reducer (46) is fixed on the vehicle frame (45). 5. The yaw mechanism of the spreader according to claim 4, characterized in that: the two ends of the axle (42) are respectively provided with a bearing seat (43), and the bearing seat (43) is nested on the vehicle frame (45) . 6. The yaw mechanism of the spreader as claimed in claim 1, characterized in that: the yaw mechanism (101) is arranged at both ends of the main beam (103) of the fan blade spreader, and the vehicle of the yaw mechanism (101) The frame (45) is hinged with the bracket assembly (102) of the wind blade spreader through pin shafts. 7. The yaw mechanism of the spreader according to claim 6, characterized in that: the arc track (2) is fixed on the main beam (103) by bolts.