Automatic leveling sling for bearing assembly

Abstract

The present invention discloses an automatic leveling hoisting machine for bearing assembly, which includes: a height adjustment system, a measurement system and a control system; the height adjustment system includes a lifting ring, an electric cylinder and a connecting rod. The lifting ring is a circular ring structure for connecting with a hoisting device. The connecting rods and the electric cylinders are in one-to-one correspondence. At least three electric cylinders are connected to the bottom of the lifting ring and are evenly distributed at intervals along the circumference of the lifting ring. One end of each connecting rod is connected to the corresponding electric cylinder, and the other end is connected to the bearing to be assembled; the measurement system is connected to the lifting ring for measuring the levelness of the bearing to be assembled and sending the measurement information to the control system; the control system is electrically connected to the measurement system and the electric cylinders, and is used to control the telescopic movement of the electric cylinders according to the measurement information so as to adjust the bearing to be assembled to a horizontal position. It realizes one-time hoisting during the main bearing assembly, fully automatic leveling, ensures the assembly speed and quality, speeds up the production progress and improves the production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation equipment assembly, and particularly to an automatic leveling sling for bearing assembly. Background Art

[0002] To reduce the cost of wind power generation and improve economic efficiency, in recent years, large-megawatt models have been the main type of wind turbines. The main drive structure of such models uses large-sized bearings, with high assembly requirements and it is difficult to ensure assembly accuracy. Due to the very large size of the main shaft and bearings of wind turbines, during assembly, the main shaft is placed vertically, the bearing is heated, then the bearing is lifted, and the lifting state of the bearing is adjusted to horizontal and then placed from above the main shaft to the bearing installation position to ensure that the degree of bearing skew is within the required range for qualified installation. When installing the bearing using the above method, after the bearing is lifted, the levelness of the upper end face of the bearing needs to be measured. If the levelness is unqualified, the bearing needs to be lowered, and the length of the lifting sling or chain is adjusted. After the adjustment is completed, trial lifting and measurement are carried out again until the bearing meets the horizontal condition. When measuring the levelness of the bearing, a spirit level is used. Since the reading interval of the spirit level is relatively long and there are certain requirements for the operator, the measurement efficiency is low. If the measurement and adjustment time is too long, resulting in excessive temperature reduction of the heated bearing, it is necessary to reheat, further reducing the assembly efficiency. Summary of the Invention

[0003] To solve some or all of the technical problems existing in the above prior art, the present invention provides an automatic leveling sling for bearing assembly. The technical solution is as follows:

[0004] An automatic leveling sling for bearing assembly is provided, including: a height adjustment system, a measurement system, and a control system; the height adjustment system includes a lifting ring, an electric cylinder, and a connecting rod. The lifting ring is a circular ring structure for connecting with a lifting device. The connecting rods and the electric cylinders are in one-to-one correspondence. At least three electric cylinders are connected to the bottom of the lifting ring and are evenly spaced along the circumference of the lifting ring. One end of each connecting rod is connected to the corresponding electric cylinder, and the other end is connected to the bearing to be assembled; the measurement system is connected to the lifting ring for measuring the levelness of the bearing to be assembled and sending the measurement information to the control system; the control system is electrically connected to the measurement system and the electric cylinders for controlling the telescopic movement of the electric cylinders according to the measurement information to adjust the bearing to be assembled to a horizontal position.

[0005] In some alternative implementation manners, a plurality of lifting lugs are provided on the top surface of the lifting ring. The plurality of lifting lugs are evenly spaced along the circumference of the lifting ring for connecting with a lifting device.

[0006] In some alternative implementations, at least three first connecting lugs are provided on the bottom surface of the lifting ring, a second connecting lug is provided on the top of the electric cylinder, and a third connecting lug is provided on the bottom of the electric cylinder. The first connecting lug and the second connecting lug are hinged, and the third connecting lug is hinged to the connecting rod.

[0007] In some alternative implementations, the first connecting lug and the second connecting lug are connected by a first pin shaft, and the third connecting lug and the connecting rod are connected by a second pin shaft.

[0008] In some alternative implementations, the measuring system includes a measuring base, an inclination sensor, and a lifting mechanism; the measuring base includes at least three measuring claws extending outward from the middle, and a measuring anvil is provided on the bottom surface of the end of each measuring claw, and a plurality of the measuring anvils are coplanar; the inclination sensor is provided on the top surface of the middle of the measuring base and is connected to the control system for detecting the inclination of the measuring base and sending it to the control system; the lifting mechanism is connected between the lifting ring and the measuring base for driving the measuring base to move up and down to contact the bearing to be assembled.

[0009] In some alternative implementations, the inclination sensor is a biaxial inclination sensor.

[0010] In some alternative implementations, the lifting mechanism includes a driving motor, a winding drum, a pulley, and a steel wire rope; the driving motor is provided on the lifting ring and is connected to the control system, the winding drum is connected to the output shaft of the driving motor, the number of the steel wire ropes and the pulleys corresponds to the number of the measuring claws, the pulleys are provided on the inner side wall of the lifting ring and are opposite to the positions of the measuring claws, one ends of the plurality of steel wire ropes are respectively fixed in the rope grooves on the winding drum, and the other ends bypass the corresponding pulleys and are connected to the lifting holes on the corresponding measuring claws.

[0011] In some alternative implementations, the control system includes an electric control box, which is connected to the inclination sensor, the driving motor, and the electric cylinder, for receiving measurement data, calculating the measurement data, and then outputting an electric cylinder control signal for leveling, and is also used for outputting a driving motor control signal to control the lifting of the measuring base.

[0012] In some alternative implementations, the control system numbers the measuring claws and the electric cylinders accordingly, and controls the corresponding electric cylinders to act according to the numbers.

[0013] The main advantages of the technical solution of the present invention are as follows:

[0014] The automatic leveling sling for bearing assembly of the present invention can, after lifting the bearing to be assembled to a certain position, the control system automatically adjusts the telescopic length of the electric cylinder according to the levelness of the bearing to be assembled measured by the measuring system, so as to adjust the bearing to be assembled to a horizontal position, realizing one-time lifting and full-automatic leveling during the main bearing assembly, ensuring the assembly speed and quality, accelerating the production progress, and improving the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the embodiments of the present invention and form a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0016] Figure 1 is a schematic structural diagram of the measuring seat of the automatic leveling sling for bearing assembly provided by an embodiment of the present invention when it is at the upper part;

[0017] Figure 2 is a schematic structural diagram of the measuring seat of the automatic leveling sling for bearing assembly provided by an embodiment of the present invention when it is at the lower part;

[0018] Figure 3 is a partial enlarged view of the automatic leveling sling for bearing assembly provided by an embodiment of the present invention at the electric cylinder.

[0019] DESCRIPTION OF THE REFERENCE NUMERALS:

[0020] 1 - Bearing, 2 - Lifting ring, 21 - Lifting ear, 22 - First connecting ear, 3 - Electric cylinder, 31 - Second connecting ear, 32 - Third connecting ear, 33 - First pin shaft, 34 - Second pin shaft, 4 - Connecting rod, 5 - Measuring seat, 51 - Measuring claw, 6 - Inclinometer sensor, 7 - Lifting mechanism, 71 - Driving motor, 72 - Drum, 73 - Pulley, 74 - Steel wire rope. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] The following will describe in detail the technical solutions provided by the embodiments of the present invention with reference to the drawings.

[0023] An embodiment of the present invention provides an automatic leveling sling for bearing assembly, as shown in the attached Figures 1 to 3As shown, it includes: a height adjustment system, a measuring system and a control system; the height adjustment system includes a lifting ring 2, an electric cylinder 3 and a connecting rod 4, the lifting ring 2 is a circular ring structure, used to connect with the lifting equipment, the connecting rod 4 and the electric cylinder 3 correspond one to one, at least three electric cylinders 3 are connected to the bottom of the lifting ring 2, and are evenly distributed along the circumferential interval of the lifting ring 2, one end of each connecting rod 4 is connected to the corresponding electric cylinder 3, and the other end is connected to the bearing 1 to be assembled; the measuring system is connected to the lifting ring 2, and is used to measure the horizontality of the bearing 1 to be assembled, and send the measurement information to the control system; the control system is electrically connected to the measuring system and the electric cylinder 3, and is used to control the extension and retraction of the electric cylinder 3 according to the measurement information and thereby adjust the bearing 1 to be assembled to a horizontal position.

[0024] The working principle of the automatic leveling hanger for bearing assembly provided by the embodiment of the present invention is described below:

[0025] When in use, the bottom end of the connecting rod 4 of the automatic leveling sling is connected to the bearing 1 to be assembled. The number of connecting rods 4 is at least 3. The figure shows a situation where there are 3 connecting rods. The 3 connecting rods 4 are evenly distributed along the circumferential intervals of the lifting ring 2. Therefore, the connecting rods 4 are evenly connected to the end of the bearing 1 to be assembled, so that the bearing 1 to be assembled is evenly stressed. Then the lifting equipment (for example, a crane) lifts the lifting ring 2. When the lifting ring 2 rises, the bearing 1 to be assembled is lifted along with the lifting ring 2, and the height of the bearing 1 to be assembled can be adjusted by adjusting the lifting height of the lifting ring 2. Before assembly, the horizontality of the bearing 1 to be assembled is measured by the measuring system, and the control system controls the corresponding electric cylinder 3 to extend and retract according to the horizontality, and adjusts the bearing 1 to be assembled to a horizontal state. For example, when a certain position of the bearing 1 to be assembled is lower, the electric cylinder 3 at that position can be shortened or the electric cylinder 3 on the opposite side can be extended. At least three electric cylinders 3 (the figure shows a situation where there are three) are evenly distributed along the circumference of the lifting ring 2, so that the bearing 1 to be assembled can be evenly stressed and the horizontality of the bearing 1 to be assembled can be easily adjusted from all directions.

[0026] In summary, the automatic leveling hoist for bearing assembly provided in the embodiment of the present invention can, after the bearing 1 to be assembled is lifted to a certain position, the control system automatically adjusts the extension and retraction of the electric cylinder 3 according to the horizontality of the bearing 1 to be assembled measured by the measurement system, thereby adjusting the bearing 1 to be assembled to a horizontal position, realizing one-time lifting and fully automatic leveling when assembling the main bearing 1, thereby ensuring the assembly speed and quality, accelerating the production progress, and improving the production efficiency.

[0027] The diameter of the lifting ring 2 can be the same as the diameter of the bearing 1 , so that the connecting rod 4 can be connected between the lifting ring 2 and the end surface of the bearing 1 .

[0028] The electric cylinder 3 may be an electrically controlled hydraulic cylinder, and the piston rod is extended and retracted under the drive of a control system.

[0029] In some alternative implementation manners of this embodiment, a plurality of lifting lugs 21 are arranged on the top surface of the lifting ring 2. The plurality of lifting lugs 21 are evenly spaced along the circumferential direction of the lifting ring 2 and are used for connecting with lifting equipment. By arranging the lifting lugs 21, it is convenient to connect with the lifting equipment. For example, the lifting equipment can be a crane, and the hook of the crane can pass through the lifting lug 21. For another example, the steel wire rope of the crane can pass through the lifting lug 21.

[0030] Among them, the number of the lifting lugs 21 can be 3, and the 3 lifting lugs 21 are evenly distributed on the lifting ring 2 at an interval of 120°. Of course, it can also be 4, 5, etc., and this embodiment does not make specific limitations on this.

[0031] In some alternative implementation manners of this embodiment, as shown in the appendix Figure 3 As shown, at least three first connecting lugs 22 are arranged on the bottom surface of the lifting ring 2, a second connecting lug 31 is arranged on the top of the electric cylinder 3, and a third connecting lug 32 is arranged on the bottom of the electric cylinder 3. The first connecting lug 22 and the second connecting lug 31 are hinged, and the third connecting lug 32 is hinged to the connecting rod 4. With such an arrangement, it is convenient to connect the electric cylinder 3 with the lifting ring 2 and the connecting rod 4.

[0032] Furthermore, as shown in the appendix Figure 3 As shown, the first connecting lug 22 and the second connecting lug 31 can be connected by a first pin shaft 33, and the third connecting lug 32 and the connecting rod 4 can be connected by a second pin shaft 34, so that there can be a certain inclination angle between the electric cylinder 3 and the connecting rod 4 to adapt to the state when the bearing 1 is uneven.

[0033] In some alternative implementation manners of this embodiment, the measurement system includes a measurement base 5, an inclination sensor 6 and a lifting mechanism 7; the measurement base 5 includes at least three measurement claws 51 extending outward from the middle, and a measurement anvil is arranged on the bottom surface of the end of each measurement claw 51, and the plurality of measurement anvils are coplanar; the inclination sensor 6 is arranged on the top surface of the middle of the measurement base 5 and is connected to the control system, and is used for detecting the inclination angle of the measurement base 5 and sending it to the control system; the lifting mechanism 7 is connected between the lifting ring 2 and the measurement base 5 and is used for driving the measurement base 5 to move up and down to contact with the bearing 1 to be assembled.

[0034] With such an arrangement, when the measurement base 5 contacts the end face of the bearing 1 driven by the lifting system, the angle of the measurement base 5 is the same as the angle of the end face of the bearing 1. Through the inclination angle detected by the inclination sensor 6, the inclination angle of the bearing 1 can be determined.

[0035] The measurement base 5 can be made of aluminum alloy and has high stiffness in the vertical direction. The upper surface of the measurement base 5 is machined into a plane by a precision machining support, and marks are made in the X and Y axis directions. The inclination sensor 6 is a high-precision biaxial inclination sensor 6 and is installed on the upper surface of the measurement base 5 according to the marked X and Y axis directions.

[0036] In some alternative implementation manners of this embodiment, the lifting mechanism 7 includes a driving motor 71, a winding drum 72, a pulley 73, and a steel wire rope 74; the driving motor 71 is arranged on the lifting ring 2 and connected to the control system, the winding drum 72 is connected to the output shaft of the driving motor 71, the number of the steel wire ropes 74 and the pulleys 73 corresponds to the number of the measuring claws 51, the pulleys 73 are arranged on the inner side wall of the lifting ring 2 and are opposite to the positions of the measuring claws 51, one ends of multiple steel wire ropes 74 are respectively fixed in the rope grooves on the winding drum 72, and the other ends bypass the corresponding pulleys 73 and are connected to the hoisting holes on the corresponding measuring claws 51.

[0037] With such a setting, the control system controls the driving motor 71 to rotate. When the winding drum 72 rotates, it drives the steel wire rope 74 to retract and extend, thereby completing the lifting of the measuring seat 5.

[0038] Among them, in a specific example, the number of the electric cylinders 3 and the connecting rods 4 is 3, the measuring seat 5 is provided with 3 measuring teeth, correspondingly, the number of the pulleys 73 is 3, and there are 3 groups of wire rope grooves on the winding drum 72 to wind 3 steel wire ropes 74.

[0039] In some alternative implementation manners of this embodiment, the control system includes an electric control box, which is connected to the inclination sensor 6, the driving motor 71, and the electric cylinder 3, and is used for receiving measurement data, performing calculation on the measurement data and then outputting an electric cylinder 3 control signal for leveling, and is also used for outputting a driving motor 71 control signal to control the lifting of the measuring seat 5. The electric control box is mainly used to provide power for electrical components such as the high-precision electric cylinder 3, the high-precision biaxial inclination sensor 6, and the driving motor 71 of the lifting mechanism 7, read the data of each sensor, perform calculation on the data using a program, and output the control data of the high-precision electric cylinder 3 for the action control of the electric cylinder 3, etc., so as to realize the real-time measurement and automatic adjustment of the inclination angle of the bearing 1.

[0040] Optionally, the control system numbers the measuring claws 51 and the electric cylinders 3 respectively, and controls the corresponding electric cylinders 3 to act according to the numbers, so as to realize the independent driving of each electric cylinder 3.

[0041] It should be noted that in this text, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. In addition, in this text, "front", "rear", "left", "right", "upper" and "lower" are all referenced with respect to the placement state shown in the drawings.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic leveling sling for bearing assembly, comprising: a height adjustment system, a measurement system, and a control system; The height adjustment system includes a lifting ring, an electric cylinder, and a connecting rod. The lifting ring is a circular ring structure for connecting with a lifting device. The connecting rods and the electric cylinders are in one-to-one correspondence. At least three electric cylinders are connected to the bottom of the lifting ring and are evenly spaced along the circumference of the lifting ring. One end of each connecting rod is connected to the corresponding electric cylinder, and the other end is connected to the bearing to be assembled; The measurement system is connected to the lifting ring for measuring the levelness of the bearing to be assembled and sending the measurement information to the control system; The control system is electrically connected to the measurement system and the electric cylinder, and is used to control the telescopic movement of the electric cylinder according to the measurement information so as to adjust the bearing to be assembled to a horizontal position. It is characterized in that the measurement system includes a measurement seat, an inclination sensor, and a lifting mechanism, wherein: The measurement seat includes at least three measurement claws extending outward from the middle. A measurement anvil is provided on the bottom surface of the end of each measurement claw, and a plurality of the measurement anvils are coplanar; The inclination sensor is arranged on the top surface of the middle of the measurement seat and is connected to the control system for detecting the inclination of the measurement seat and sending it to the control system; The lifting mechanism is connected between the lifting ring and the measurement seat for driving the measurement seat to move up and down to contact the bearing to be assembled.

2. The automatic leveling sling for bearing assembly according to claim 1, characterized in that A plurality of lifting lugs are provided on the top surface of the lifting ring, and the plurality of lifting lugs are evenly spaced along the circumference of the lifting ring for connecting with a lifting device.

3. The automatic leveling sling for bearing assembly according to claim 2, characterized in that At least three first connecting lugs are provided on the bottom surface of the lifting ring, a second connecting lug is provided on the top of the electric cylinder, and a third connecting lug is provided on the bottom of the electric cylinder. The first connecting lug and the second connecting lug are hinged, and the third connecting lug is hinged to the connecting rod.

4. The automatic leveling sling for bearing assembly according to claim 3, characterized in that The first connecting lug and the second connecting lug are connected by a first pin shaft, and the third connecting lug and the connecting rod are connected by a second pin shaft.

5. The automatic leveling sling for bearing assembly according to claim 1, characterized in that The inclination sensor is a biaxial inclination sensor.

6. The automatic leveling sling for bearing assembly according to claim 5, characterized in that The lifting mechanism includes a driving motor, a drum, a pulley, and a steel wire rope; The driving motor is arranged on the lifting ring and is connected to the control system. The drum is connected to the output shaft of the driving motor. The number of the steel wire ropes and the pulleys corresponds to the number of the measurement claws. The pulleys are arranged on the inner side wall of the lifting ring and are opposite to the positions of the measurement claws. One ends of the plurality of steel wire ropes are respectively fixed in the rope grooves on the drum, and the other ends bypass the corresponding pulleys and are connected to the lifting holes on the corresponding measurement claws.

7. The automatic leveling sling for bearing assembly according to claim 6, characterized in that, the control system includes an electric control box, which is connected to an inclination sensor, a driving motor and an electric cylinder, and is used to receive measurement data, calculate the measurement data and then output an electric cylinder control signal for leveling, and is also used to output a driving motor control signal to control the lifting of the measurement seat.

8. The automatic leveling sling for bearing assembly according to claim 7, characterized in that, the control system numbers the measuring claws and the electric cylinders respectively, and controls the corresponding electric cylinders to act according to the numbers.

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