A chain retracting device for an electric chain hoist of a wind turbine

Abstract

The present invention relates to a chain collection device for a wind turbine chain electric hoist, comprising a housing assembly and a transmission chain mechanism. The housing assembly comprises a chain storage box housing and a chain entry duct; the chain entry duct comprises an inclined section, a bent section and a sheet metal section connected in sequence; the inclined section is inclined to have an angle with the horizontal direction, and the chain of the wind turbine chain electric hoist obliquely enters the chain entry duct; the bent section bends downward to gradually reduce the angle with the vertical direction to 0°, and the sheet metal section is a box structure that serves to increase the strength of the chain entry duct; in the initial state, the chain of the wind turbine chain electric hoist enters the bottom of the chain storage box housing through the chain entry duct and begins to accumulate, and then enters the transmission chain mechanism, which is guided and locked to the fixed ring of the inclined wall of the chain storage box. The present invention adopts a horizontally installed chain storage box structure, which has the function of automatic chain entry at the near point of the existing horizontally placed chain storage box, and has a new function of manual chain entry at the far point, and is simple to operate as a whole, with high work efficiency and good safety.

Description

Technical Field

[0001] The invention relates to the technical field of electric hoists, and in particular to a chain retracting device of an electric chain hoist of a wind turbine generator set. Background Art

[0002] In wind turbine generator sets, electric chain hoist is an important maintenance lifting equipment, used for lifting objects on the ground to the inside of the cabin or replacing parts inside the cabin. The chain retracting device in the electric chain hoist is an indispensable component, used for storing the chain.

[0003] The existing chain collecting devices mainly include chain collecting bags and chain storage boxes. According to the installation position of the chain collecting device, there are two types: one is a suspended installation that is connected to the chain electric hoist motor with bolts and then hung at the lifting point. The other is a horizontal installation that is placed on the cabin platform and connected to the chain electric hoist motor through a chain guide pipe. For the suspended installation, the chain collecting device will shake for a long time, which may cause the installation bolts of the chain collecting device to break, causing danger. In particular, in recent years, as the tower height has been continuously increased, the chain has become longer and longer, the chain storage box has become larger and larger, and the overall weight has become heavier, resulting in an increasing risk of the installation bolts breaking. For horizontal installation, the chain guide tube is fixed in length and cannot be effectively extended over a large range, which limits the operation coverage of the chain hoist. Or after the chain guide tube is separated from the chain hoist motor, the chain needs to be put into the chain storage box by hand. When replacing parts inside the cabin, the length of the chain is only about 2 meters. This method is desirable, but if it is used for lifting from the ground to the inside of the cabin, the length of the chain is generally more than 100 meters. At this time, putting the chain into the chain storage box by hand is inefficient, labor-intensive, and cumbersome. The use of horizontally installed chain collection devices will be the development trend of future supporting high-tower projects.

[0004] The chain storage box is installed in a suspended manner, and the connecting parts and the chain bag are connected by chains, which changes the hard connection into a soft connection and realizes a soft connection. In ordinary tower projects less than 100 meters, the size and weight of the chain storage box are moderate, which has an improvement effect on increasing safety. However, in recent years, due to the continuous increase in tower height, the chain is getting longer and longer, the size of the chain storage box is getting larger and larger, and the overall weight is getting heavier. Using this method, the chain storage box still shakes frequently in the air, and there is still a risk of fatigue shear fracture when the bolts are loose. In addition, when moving in space, due to the large size of the chain storage box, the size of other components inside the cabin, such as cabin cabinets and generators is limited. The heavy weight also increases the difficulty of moving operations.

[0005] The horizontally installed chain storage box is connected to the chain electric hoist motor through a chain guide pipe. Since the length of the chain guide pipe is fixed and cannot be extended, when there are more than two lifting points in the cabin that are far apart from each other (from the bottom of the tower to the cabin), the chain guide pipe needs to be separated from the chain electric hoist motor. At this time, when entering the chain, people need to manually put the chain into the chain storage box section by section. The chain length of the chain electric hoist in the cabin is generally more than 100 meters. Therefore, the operation efficiency is low, the labor intensity is high, and the operation is cumbersome. Summary of the invention

[0006] In view of the problems existing in the prior art, the present invention provides a chain collecting device for an electric chain hoist of a wind turbine generator set. When the corresponding lifting point is located near the electric chain hoist during hoisting from the bottom of the tower to the cabin, the chain can automatically enter the chain collecting box without operating the chain collecting device. When the corresponding lifting point is far away from the electric chain hoist during hoisting from the bottom of the tower to the cabin, since the length of the chain guide pipe is fixed and the chain storage box is also fixedly installed and cannot be moved, it is necessary to remove the interface parts of the chain guide pipe of the electric chain hoist at the chain storage box, so that the chain guide pipe is moved to the lifting point position together with the motor of the electric chain hoist. After use, the chain can enter the chain collecting box by shaking the handle. The operation is simple and the safety is good.

[0007] To achieve the above object, the present invention provides a chain collection device for an electric chain hoist of a wind turbine generator set, comprising a housing assembly and a transmission chain mechanism;

[0008] The housing assembly comprises a chain storage box housing and a chain entry duct; the chain entry duct comprises an inclined section, a bent section and a sheet metal section connected in sequence; the inclined section is inclined and has an angle with the horizontal direction, and the chain of the wind turbine chain electric hoist enters the chain entry duct obliquely; the bent section bends downward to gradually reduce the angle with the vertical direction to 0 degrees, and the sheet metal section is a box structure, connected to the bent section;

[0009] The transmission chain mechanism is fixed to the chain storage box housing, and the chain of the wind turbine chain electric hoist enters the chain storage box housing through the chain inlet guide tube, and the tail end is locked on the fixed ring of the inclined wall of the chain storage box after being guided by the transmission chain mechanism; in the initial state, the chain enters the chain storage box housing and is accumulated in the chain storage box housing before entering the transmission chain mechanism;

[0010] After the transmission chain mechanism guides the chain in, the chain of the wind turbine electric chain hoist enters the chain storage box housing through the chain inlet guide tube, and is accumulated in the chain storage box housing after being guided by the transmission chain mechanism.

[0011] Further, the transmission chain mechanism comprises a transmission shaft and a sprocket; the sprocket is fixed to the transmission shaft;

[0012] The transmission shaft can rotate relative to the chain storage box housing, drive the sprocket to rotate, and guide the chain of the wind turbine group chain electric hoist to be retracted in the chain storage box housing.

[0013] Furthermore, the sprocket baffle is fixed to the baffle mounting plate, and the baffle mounting plate is fixed to the chain storage box housing; the profile of the sprocket baffle covers one side of the sprocket, and limits and guides the winding direction of the chain when winding the chain.

[0014] Furthermore, the right side area of ​​the lower end surface area of ​​the bending section of the chain inlet conduit is cut off, the cut-off area is connected to the box body sheet metal section, and the upper panel area of ​​the sheet metal section is partially cut off along the central axis.

[0015] Further, the bent segment cut-out area and the sheet metal segment cut-out area satisfy the following condition: when the chain on the sprocket is tightened at the upper end of the chain entry guide tube, the chain cannot interfere with the chain entry guide tube.

[0016] Furthermore, the angle between the inclined section and the horizontal direction is 35° to 45°, and after the bent section is bent, the angle between the chain entry conduit and the vertical direction is 0°.

[0017] Furthermore, the chain storage box housing is an octahedral sheet metal part comprising a first wall, a second wall, and a third wall, wherein the first wall and the third wall are vertical and parallel, and the angle between the second wall and the third wall is 130° to 150°; the fixing ring is fixed to the second arm inside the chain storage box housing.

[0018] Furthermore, the spatial position of the sprocket meets the following conditions: the chain centerline 1 of the chain that bypasses the naturally drooping section of the sprocket is located on the third wall, and when the chain is manually cranked in from a far point, the sprocket slot is on the chain centerline 2.

[0019] Furthermore, both ends of the transmission shaft are fixed to the chain box housing through ball bearings, the ball bearings are mounted on the bearing seats, and axial positioning is achieved through the end covers and the shoulders of the transmission shaft.

[0020] Furthermore, the sprocket is fixed to the transmission shaft, the sprocket is limited in circular rotation by a first flat key and receives the torque transmitted by the first flat key, and is axially limited by an elastic retaining ring 1 through the first shaft; the handle is fixed to the transmission shaft, the handle is limited in circular rotation by a second flat key and transmits torque, and is axially limited by an elastic retaining ring 2 through the second shaft.

[0021] The above technical solution of the present invention has the following beneficial technical effects:

[0022] (1) The chain collection device of the electric chain hoist of the wind turbine set of the present invention adopts a horizontally mounted chain storage box structure, which has the function of automatic chain entry at a near point of the existing horizontally mounted chain storage box, and at the same time, has a new function of manual chain entry at a far point that the existing horizontally mounted chain storage box does not have. The overall operation is simple, the work efficiency is high, and the safety is good. After hoisting the tower bottom or the ground object at a position far away from the chain collection device, the chain can be easily entered by the handle of the manual transmission chain.

[0023] (2) The present invention adopts a combined conduit of a bent conduit and a sheet metal section of a box body. The inlet shape is not vertical and has an angle with the horizontal plane, which can effectively reduce the resistance value when the crank handle chain is put into the chain, and can effectively improve the wear environment when the chain is put into the chain. The right area of ​​the lower end surface area is cut off, and the upper panel area of ​​the connected sheet metal section is also partially cut off along the central axis, which is convenient for the chain to be taken out and can effectively improve the wear environment when the chain is taken out.

[0024] (3) The chain storage box of the present invention adopts a shell structure, which is an octahedral sheet metal part including a first wall, a second wall, and a third wall, wherein the first wall and the third wall are vertical and parallel, and the second wall and the third wall have an included angle, wherein the fixing ring is fixed on the second wall, so as to prevent the adverse effect of three chains being entangled with each other in the chain stacking area in the initial stage when arranged at the bottom of the chain storage box.

[0025] (4) The sprocket baffle of the internal transmission chain mechanism of the present invention is arranged opposite to the sprocket, and the spacing is appropriate to prevent the occurrence of chain slippage and chain derailment. The spatial position of the sprocket is appropriately arranged, and the chain center axis 1 of the chain that bypasses the naturally drooping section of the sprocket is located on the third wall, which can eliminate the adverse effect of the double chains entangled with each other when the chains are stacked in the chain storage box, and when the double chains are manually cranked into the chain at the far point, the sprocket slot is on the chain center axis 2, so that the chain enters the sprocket smoothly, which can reduce resistance, improve the operating environment, and increase the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is an overall schematic diagram of a chain collection device of a wind turbine electric chain hoist of the present invention;

[0027] Figure 2 It is a schematic diagram of the front view of the chain collection device of the electric chain hoist of the wind turbine generator set;

[0028] Figure 3-Figure 5 This is a BB cross-sectional view of the chain collection device of the wind turbine chain electric hoist, where Figure 3 is the initial state diagram, Figure 4 This is the state diagram of hand-cranking into the chain; Figure 5 This is the state diagram when the chain is manually cranked in and then out again.

[0029] Figure 6 It is an AA cross-sectional view of the chain collection device of the electric chain hoist of the wind turbine set;

[0030] Figure 7 It is a schematic diagram of the transmission chain of the chain collection device of the electric chain hoist of the wind turbine generator set;

[0031] Figure 8 Schematic diagram of a chain collecting device box of a chain collecting device of an electric chain hoist of a wind turbine generator set;

[0032] Fig. 9 This is a schematic diagram of the chain entry guide of the chain collection device of the wind turbine electric chain hoist;

[0033] Fig.10 The invention discloses a connection diagram of an electric chain hoist and a chain collecting device of a wind turbine generator set.

[0034] In the figure: 1-chain storage box housing, 2-chain inlet guide tube, 3a, 3b-baffle mounting plate, 4-sprocket baffle, 5-sprocket, 6-drive shaft, 7-one flat key, 8-one elastic retaining ring for shaft, 9-bearing seat, 10-end cover, 11-two elastic retaining rings for shaft, 12-two flat keys, 13-ball bearing, 14-chain storage box mounting plate, 15-handle, 16-flashlight door placement box, 17-fixing ring, 18-baffle rib plate; 100-chain electric hoist, 200-chain collection device. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0036] A specific embodiment of a chain collection device for a wind turbine chain electric hoist of the present invention:

[0037] like Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 7 , Figure 8 , Fig. 9 As shown, a chain collection device of a wind turbine electric chain hoist comprises two major parts: a housing component and a transmission chain mechanism.

[0038] The shell of the chain collecting device is a welded box structure, including a chain storage box shell 1, a chain entry duct 2, baffle mounting plates 3a, 3b, a chain storage box mounting plate 14, a fixing ring 17, and a baffle rib 18, all of which are connected by welding, and the strength is firm and reliable, wherein the chain storage box shell 1 is an octahedral sheet metal part containing a first wall 1-1, a second wall 1-2, and a third wall 1-3, wherein the first wall 1-1 and the third wall 1-3 are vertical and parallel, and the second wall 1-2 and the third wall 1-3 have an angle, and the angle ranges from 130° to 150°, so as to match the arrangement of the spatial positions of the sprocket and the fixing ring; wherein the chain entry duct 2 is a combined duct of a bent duct and a box sheet metal section, and the inlet shape is non-vertical , with a certain inclination angle with the horizontal plane, the inclination angle ranges from 35° to 45°, which can effectively reduce the resistance value of the chain when the handle is shaken and the chain is fed in, and can improve the wear environment of the chain when it is fed in, the right area of ​​the lower end surface area is cut off, and the upper panel area of ​​the connected sheet metal section is also partially cut off along the central axis, which is convenient for the chain to be discharged and can effectively improve the wear environment of the chain when it is discharged, and the cutting point satisfies: when the chain on the sprocket is tightened at the upper end of the chain feeding guide tube, the chain cannot interfere with the low points E and F on the upper side of the inner wall of the chain feeding guide tube cavity; wherein the fixing ring is fixed on the second arm, which can prevent the adverse effect of three chains winding around each other in the chain stacking area in the initial stage when it is arranged at the bottom of the chain storage box.

[0039] like Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, the internal transmission chain mechanism of the chain collecting device of the chain electric hoist includes a sprocket 5, a sprocket baffle 4, a transmission shaft 6, a flat key 7, an elastic retaining ring 8 for the shaft, a bearing seat 9, an end cover 10, an elastic retaining ring 11 for the shaft, a flat key 12, a ball bearing 13, and a handle 15.

[0040] The handle 15 is limited in circumferential rotation and transmits torque through the flat key 12, and is limited in axial direction through the shaft elastic retaining ring 11.

[0041] The sprocket 5 is limited in circumferential rotation by a flat key 7 and receives the torque transmitted by it, and is limited in axial direction by a shaft elastic retaining ring 8.

[0042] The transmission shaft 6 has ball bearings 13 installed at both ends for support and rotation.

[0043] The ball bearings 13 at both ends are mounted on the bearing seats 9 at both ends, and are axially positioned through the end covers 10 and the shoulders of the transmission shaft 6 .

[0044] The bearing seat 9 is connected to the chain storage box housing 1 by bolts and nuts. The end cover 10 is installed on the threaded hole of the bearing seat 9 by bolts. The sprocket baffle 4 is installed on the baffle mounting plates 3a, 3b of the housing by bolts.

[0045] The sprocket baffle 4 of the internal transmission chain mechanism is arranged opposite to the sprocket 5 with an appropriate spacing, which can prevent the occurrence of chain slippage and chain derailment. The spatial position of the sprocket is appropriately arranged, and the chain center axis 1 of the chain that bypasses the naturally drooping section of the sprocket is located on the third wall, which can eliminate the adverse effects of the double chains being entangled with each other when the chains are stacked in the chain storage box. When the double chains are manually cranked into the chain at a far point, the sprocket slot is on the chain center axis 2, so that the chain enters the sprocket smoothly, which can reduce resistance, improve the operating environment, and increase service life.

[0046] Combination Figure 3 In the initial state, the chain enters the chain storage box housing and accumulates in the chain storage box housing before entering the transmission chain mechanism. At this time, the chain cannot be manually cranked out. The chain is driven by the chain electric hoist 100 to enter and exit the chain at the chain collection device 200. Fig.10 . Combined Figure 4 , 5 After the chain is guided in by the transmission chain mechanism, the chain of the wind turbine chain electric hoist enters the chain storage box housing through the chain entry conduit, and is accumulated in the chain storage box housing after being guided by the transmission chain mechanism. When the chain is manually cranked in, the chain is accumulated after being guided by the transmission chain mechanism, and is tilted downward along the third wall 1-3. When the chain is manually cranked in and then discharged again, the chain is guided by the transmission chain mechanism and discharged through the chain entry conduit.

[0047] In summary, the present invention relates to a chain collection device for a wind turbine chain electric hoist, wherein the housing assembly comprises a chain storage box housing and a chain entry duct; the chain entry duct comprises an inclined section, a bent section and a box body sheet metal section connected in sequence; the inclined section is inclined so as to have an angle with the horizontal direction, and the chain of the wind turbine chain electric hoist enters the chain entry duct at an angle; the bent section bends downward to gradually reduce the angle with the vertical direction to 0°, and the sheet metal section is a box body structure to increase the strength of the chain entry duct; the chain of the wind turbine chain electric hoist enters the bottom of the chain storage box housing through the chain entry duct and begins to accumulate, and then enters the transmission chain mechanism, which is guided and locked to the fixed ring of the inclined wall of the chain storage box. The present invention adopts a horizontally installed chain storage box structure, has the function of automatic chain entry at the near point of the existing horizontally placed chain storage box, and has a new function of manual chain entry at the far point, and is simple to operate as a whole, with high work efficiency and good safety.

[0048] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or the equivalent forms of such scope and boundaries.

Claims

1. A chain collection device for a wind turbine chain electric hoist, characterized in that: It includes a housing assembly and a transmission chain mechanism; The housing assembly comprises a chain storage box housing and a chain entry duct; the chain entry duct comprises an inclined section, a bent section and a sheet metal section connected in sequence; the inclined section is inclined and has an angle with the horizontal direction, and the chain of the wind turbine chain electric hoist enters the chain entry duct obliquely; the bent section bends downward to gradually reduce the angle with the vertical direction to 0 degrees, and the sheet metal section is a box structure, connected to the bent section; The transmission chain mechanism is fixed to the chain storage box housing, and the chain of the wind turbine chain electric hoist enters the chain storage box housing through the chain inlet guide tube, and the tail end is locked on the fixed ring of the inclined wall of the chain storage box after being guided by the transmission chain mechanism; in the initial state, the chain enters the chain storage box housing and is accumulated in the chain storage box housing before entering the transmission chain mechanism; After the transmission chain mechanism guides the chain in, the chain of the wind turbine electric chain hoist enters the chain storage box housing through the chain inlet guide tube, and is accumulated in the chain storage box housing after being guided by the transmission chain mechanism; The transmission chain mechanism comprises a transmission shaft and a sprocket; the sprocket is fixed to the transmission shaft; the spatial position of the sprocket meets the following conditions: the chain center axis 1 of the chain that bypasses the naturally drooping section of the sprocket is located on the third wall, and when the chain is manually cranked in at a far point, the sprocket slot is on the chain center axis 2; The chain storage box housing is an octahedral sheet metal component comprising a first wall, a second wall and a third wall, wherein the first wall and the third wall are vertical and parallel, and the angle between the second wall and the third wall is 130° to 150°; the fixing ring is fixed to the second wall inside the chain storage box housing.

2. The chain collection device of the electric chain hoist of a wind turbine according to claim 1, characterized in that: The transmission shaft can rotate relative to the chain storage box housing, drive the sprocket to rotate, and guide the chain of the wind turbine group chain electric hoist to be retracted in the chain storage box housing.

3. The chain collection device of the electric chain hoist of a wind turbine according to claim 2, characterized in that: A sprocket baffle is fixed on the baffle mounting plate, and the baffle mounting plate is fixed to the chain storage box housing; the profile of the sprocket baffle covers one side of the sprocket, limits the position and guides the winding direction of the chain when winding the chain.

4. The chain collection device of the electric chain hoist of a wind turbine according to claim 2, characterized in that: The right side area of ​​the lower end surface area of ​​the bending section of the chain entry conduit is cut off, the cut-off area is connected to the box body sheet metal section, and the upper panel area of ​​the sheet metal section is partially cut off along the central axis.

5. The chain collection device of the electric chain hoist of a wind turbine according to claim 4, characterized in that: The bent segment cut-out area and the sheet metal segment cut-out area meet the following conditions: when the chain on the sprocket is tightened at the upper end of the chain entry guide, the chain cannot interfere with the chain entry guide.

6. The chain collection device of the electric chain hoist of a wind turbine according to claim 1 or 2, characterized in that: The angle between the inclined section and the horizontal direction is 35° to 45°, and the angle between the chain entry conduit and the vertical direction is 0° after the bending section is bent.

7. The chain collection device of the electric chain hoist of a wind turbine according to claim 2, characterized in that: Both ends of the transmission shaft are fixed to the chain box housing through ball bearings. The ball bearings are installed on the bearing seats and axial positioning is achieved through the end covers and the shoulders of the transmission shaft.

8. The chain collection device of the electric chain hoist of a wind turbine according to claim 2, characterized in that: The sprocket is fixed to the transmission shaft, and the sprocket is limited in circular rotation by the first flat key and receives the torque transmitted by the first flat key, and is axially limited by an elastic retaining ring 1 through the first shaft; the handle is fixed to the transmission shaft, and the handle is limited in circular rotation by the second flat key and transmits torque, and is axially limited by an elastic retaining ring 2 through the second shaft.

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