CN117049402B - Gravity center adjusting method for crane on tower of wind generating set - Google Patents

Gravity center adjusting method for crane on tower of wind generating set Download PDF

Info

Publication number
CN117049402B
CN117049402B CN202311313941.6A CN202311313941A CN117049402B CN 117049402 B CN117049402 B CN 117049402B CN 202311313941 A CN202311313941 A CN 202311313941A CN 117049402 B CN117049402 B CN 117049402B
Authority
CN
China
Prior art keywords
pulley
main
crane
auxiliary
tower
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202311313941.6A
Other languages
Chinese (zh)
Other versions
CN117049402A (en
Inventor
黎燕航
刘作广
马涛
王猛
周剑锋
张凯
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Gololi Technology Co ltd
Original Assignee
Shanghai Gololi Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai Gololi Technology Co ltd filed Critical Shanghai Gololi Technology Co ltd
Priority to CN202311313941.6A priority Critical patent/CN117049402B/en
Publication of CN117049402A publication Critical patent/CN117049402A/en
Application granted granted Critical
Publication of CN117049402B publication Critical patent/CN117049402B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/64—Jibs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
    • B66C13/08—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for depositing loads in desired attitudes or positions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/62—Constructional features or details
    • B66C23/82—Luffing gear
    • B66C23/821—Bracing equipment for booms
    • B66C23/826—Bracing equipment acting at an inclined angle to vertical and horizontal directions
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

Abstract

The invention provides a gravity center adjusting method for a crane on a tower of a wind generating set, which comprises the following steps: the main crane is arranged below the auxiliary crane, and the auxiliary crane pulley is positioned at the centers of the first pulley and the second pulley in the horizontal direction; the steel wire rope bypasses the auxiliary hanging pulley and fixedly connects the auxiliary hanging pulley with the auxiliary crane; the length of the hydraulic cylinder is adjusted, and then the rotation angle of the main suspension arm is adjusted, so that the main suspension arm rotates downwards from an initial horizontal position until the gravity center of the main crane is positioned on a vertical line where the auxiliary suspension pulley is positioned; the position of the main power unit is adjusted so that the steel wire rope is vertically arranged after bypassing the third pulley and is positioned on the same vertical line with the center of the auxiliary hanging pulley. According to the gravity center adjusting method for the tower crane of the wind generating set, the length of the hydraulic cylinder is adjusted, so that the rotation angle of the main suspension arm is adjusted to a proper position, and the gravity center can be adjusted when the tower crane is in a lifting state, so that stable work is realized.

Description

Gravity center adjusting method for crane on tower of wind generating set
Technical Field
The invention belongs to the technical field of wind power generation, and particularly relates to a gravity center adjusting method for a crane on a tower of a wind generating set.
Background
The blade of the wind driven generator needs to be replaced, but the blade is heavy, the height of the tower barrel is higher, at present, a large-sized automobile crane is adopted for replacing the blade of a general wind driven generator set, a crawler crane is adopted for replacing the blade of a high-megawatt tower fan, and a landing leg ship is required for replacing the blade of the offshore wind driven generator. The use of large hoisting equipment not only generates high hoisting cost, but also is subject to environmental conditions.
According to the lifting method of the tower crane of the wind generating set, however, after the tower crane is switched from an initial working state to a lifting state, the lifting arm moves from one end of the main base to the other end of the main base to extend the lifting arm due to the need of lifting a heavy object, but the tower crane is easy to lose balance, so that the tower crane cannot work normally.
Therefore, it is necessary to provide a tower crane of a wind generating set, so as to realize balanced hoisting of the tower crane.
Disclosure of Invention
The invention provides a tower crane of a wind generating set, which is characterized in that the length of a hydraulic cylinder is adjusted to further adjust the rotation angle of a main suspension arm to a proper position, so that the gravity center of the tower crane can be adjusted in a lifting state to realize stable work.
In order to achieve the above purpose, the present invention provides the following technical solutions.
The gravity center adjusting method for the tower crane of the wind generating set comprises a tower barrel fixed on the ground and a cabin arranged at the top of the tower barrel, wherein the tower crane comprises a main crane and an auxiliary crane for hoisting the main crane, the auxiliary crane is arranged on the cabin, and an auxiliary hoisting pulley is arranged on the auxiliary crane; the main crane comprises a main base, a main suspension arm, a hydraulic cylinder, a pulley block, a steel wire rope and a main power unit, wherein one end of the main suspension arm is movably connected with the main base, a lifting hook is arranged at the other end of the main suspension arm, the pulley block comprises a first pulley and a second pulley which are arranged on the main suspension arm, a plurality of adjusting pulleys which are arranged on the main base and a third pulley which is arranged on one side, close to the main suspension arm, of the main base, one end of the steel wire rope is connected with the lifting hook, and the other end of the steel wire rope sequentially bypasses the first pulley, the auxiliary suspension pulley, the second pulley, the plurality of adjusting pulleys and the third pulley to be connected to the main power unit;
the gravity center adjusting method comprises the following steps: placing the main crane below the auxiliary crane with the auxiliary crane pulley positioned at the centers of the first pulley and the second pulley in the horizontal direction; the steel wire rope bypasses the auxiliary hanging pulley and fixedly connects the auxiliary hanging pulley with the auxiliary crane; the length of the hydraulic cylinder is adjusted, and then the rotation angle of the main suspension arm is adjusted, so that the main suspension arm rotates downwards from an initial horizontal position until the gravity center of the main crane is positioned on a vertical line where the auxiliary suspension pulley is positioned; and adjusting the position of the main power unit so that the steel wire rope is vertically arranged after bypassing the third pulley and is positioned on the same vertical line with the center of the auxiliary hanging pulley.
Optionally, when the main crane is in an initial state, the main boom is set at a first position, and when the main crane is in a lifted state, the main boom is set at a second position, and a rotation angle of the main boom from the first position to the second position is calculated by the following formula:
，
wherein,for the angle of rotation of the main boom from the first position to the second position, +.>For the weight of the main base, +.>Is the vertical distance between the gravity center of the main base and the vertical line where the auxiliary hanging pulley is located, < >>For the weight of the main boom +.>Is the vertical distance between the gravity center of the main suspension arm at the first position and the vertical line where the auxiliary suspension pulley is located.
Optionally, the connection point of the main base and the main boom is a first connection point, the connection point of the main base and the hydraulic cylinder is a second connection point, and the connection point of the main boom and the hydraulic cylinder is a third connection point.
Optionally, the shortened length of the hydraulic cylinder is calculated by the following formula:
，
wherein,for the shortened length of the hydraulic cylinder, +.>For the distance of the first connection point to the second connection point, +.>For the distance of the first connection point to the third connection point, +.>For the angle between the line connecting the first and the second connection point and the line connecting the first and the third connection point when the main boom is in the horizontal position->For the angle of rotation of the main boom from the first position to the second position.
Optionally, the main base is provided with a sliding groove, one end of the main boom is provided with a pin shaft, the pin shaft is inserted into the sliding groove, and the main boom can move along the sliding groove.
Optionally, a locking mechanism is further arranged on the main base, and the locking mechanism is arranged at the sliding groove to block the pin shaft from moving along the sliding groove;
the gravity center adjusting method further comprises the following steps: before adjusting the rotation angle of the main boom from the first position to the second position, adjusting the position of the main boom in the sliding groove, and moving the pin shaft to the end part of the sliding groove so that the arm length of the main boom extending out of the main base reaches the maximum; and adjusting and locking the locking mechanism to prevent the pin shaft from moving.
Optionally, the locking mechanism comprises a first set of locking units for blocking the pin movement when the main boom is in a first articulated position and a second set of locking units for blocking the pin movement when the main boom is in a second articulated position.
Optionally, the first pulley and the second pulley are spaced apart at an end of the main boom to which the main base is connected.
Optionally, a distance between the first pulley and the second pulley is equal to a diameter of the auxiliary hanging pulley;
the gravity center adjusting method further comprises the following steps: placing the auxiliary hanging pulley between the first pulley and the second pulley; and winding the steel wire rope between the first pulley and the second pulley from the lower part of the first pulley to the upper part of the auxiliary hanging pulley and then to the lower part of the second pulley, so that the steel wire rope between the first pulley and the auxiliary hanging pulley and the steel wire rope between the second pulley and the auxiliary hanging pulley are in a vertical state.
Optionally, the main power unit is a winch or a winch, and the main power unit is arranged on the ground.
Compared with the prior art, the technical scheme of the embodiment of the invention has the beneficial effects.
According to the gravity center adjusting method for the tower crane of the wind generating set, provided by the embodiment of the invention, the rotation angle of the main suspension arm is adjusted to a proper position by adjusting the length of the hydraulic cylinder, so that the gravity center can be adjusted when the tower crane is in a lifting state, and stable work can be realized;
further, the position of the main boom is accurately adjusted by calculating the rotation angle of the main boom from the first position to the second position; further, the position of the hydraulic cylinder is precisely controlled by calculating the shortened length of the hydraulic cylinder;
further, a locking mechanism is arranged at the sliding groove to prevent the pin on the main boom from moving along the sliding groove, and a first group of locking units and a second group of locking units are arranged to prevent the pin from moving at a first hinge position and a second hinge position of the main boom respectively;
further, the steel wire rope between the first pulley and the second pulley is wound from the lower part of the first pulley to the upper part of the auxiliary hanging pulley and then to the lower part of the second pulley, and the steel wire rope between the first pulley and the auxiliary hanging pulley and the steel wire rope between the second pulley and the auxiliary hanging pulley are in a vertical state by the winding mode of the steel wire rope among the first pulley, the second pulley and the auxiliary hanging pulley, so that the crane on the tower is in a balanced state better.
Drawings
FIG. 1 is a schematic representation of a tower crane ready for lifting in a method of center of gravity adjustment for a wind turbine tower crane in accordance with an embodiment of the present invention;
FIG. 2 is a schematic diagram of a tower crane center of gravity adjustment in a method for adjusting a center of gravity of a tower crane of a wind turbine generator system in accordance with an embodiment of the present invention;
FIG. 3 is a schematic diagram of a tower crane center of gravity adjustment used in a method for adjusting the center of gravity of a tower crane of a wind turbine generator system according to an embodiment of the present invention;
FIG. 4 is a schematic view of a method for adjusting the center of gravity of a crane on a wind turbine tower according to an embodiment of the invention with a main boom in a first articulated position;
FIG. 5 is a schematic view of a method for adjusting the center of gravity of a crane on a wind turbine tower according to an embodiment of the invention with a main boom in a second articulated position;
FIG. 6 is a schematic diagram of a connection point before center of gravity adjustment of a tower crane in a method for center of gravity adjustment of a tower crane of a wind turbine generator system according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of connection points after center of gravity adjustment of a tower crane in a method for center of gravity adjustment of a tower crane of a wind turbine generator system according to an embodiment of the invention.
Reference numerals illustrate:
1. a tower; 2. a nacelle; 3. a main crane; 4. an auxiliary crane;
31. a main base; 32. a main boom; 33. a hydraulic cylinder; 34. a lifting hook; 35. a wire rope; 36. pulley block; 361. a first pulley; 362. a second pulley; 363. a third pulley; 364. an adjusting pulley; 37. a main power unit; 38. a pulley mounting rack;
3131. a slip groove; 3132. a locking mechanism; 323. a pin shaft;
441. an auxiliary hanging pulley; 442. a pulley bracket; 45. a traction rope;
51. a first connection point; 52. a second connection point; 53. and a third connection point.
Detailed Description
In order to make the objects, features and advantageous effects of the present invention more comprehensible, embodiments accompanied with figures are described in detail below. It is to be understood that the following detailed description is merely illustrative of the invention, and not restrictive of the invention. Moreover, the use of the same, similar reference numbers in the figures may indicate the same, similar elements in different embodiments, and descriptions of the same, similar elements in different embodiments, as well as descriptions of prior art elements, features, effects, etc. may be omitted.
Referring to fig. 1 to 7, an embodiment of the present invention provides a gravity center adjusting method for a tower crane of a wind generating set, which adjusts a rotation angle of a main suspension arm to a proper position by adjusting a length of a hydraulic cylinder, so as to adjust a gravity center of the tower crane in a lifting state to realize stable operation.
Specifically, the wind generating set comprises a tower 1 fixed on the ground and a cabin 2 arranged at the top of the tower 1, wherein the tower crane comprises a main crane 3 and an auxiliary crane 4 for hoisting the main crane 3, the auxiliary crane 4 is arranged on the cabin 2, and an auxiliary crane pulley 441 is arranged on the auxiliary crane 4; the main crane 3 comprises a main base 31, a main boom 32, a hydraulic cylinder 33, a pulley block 36, a steel wire rope 35 and a main power unit 37, one end of the main boom 32 is movably connected with the main base 31, the other end of the main boom 32 is provided with a lifting hook 34, the pulley block 36 comprises a first pulley 361 and a second pulley 362 which are arranged on the main boom 32, a plurality of adjusting pulleys 364 which are arranged on the main base 31 and a third pulley 363 which is arranged on one side of the main base 31 close to the main boom 32, one end of the steel wire rope 35 is connected with the lifting hook 34, the other end sequentially bypasses the first pulley 361, an auxiliary lifting pulley 441, the second pulley 362, the plurality of adjusting pulleys 364 and the third pulley 363 to be connected to the main power unit 37, and the gravity center adjusting method comprises the following steps:
s1: the main crane 3 is placed below the auxiliary crane 4 with the auxiliary crane pulley 441 being positioned at the center of the first pulley 361 and the second pulley 362 in the horizontal direction;
s2: the steel wire rope 35 is wound around the auxiliary crane pulley 441, and the auxiliary crane pulley 441 is fixedly connected with the auxiliary crane 4;
s3: the length of the hydraulic cylinder 33 and thus the rotation angle of the main boom 32 is adjusted so that the main boom 32 rotates downward from the initial horizontal position until the center of gravity of the main crane 3 is located on the vertical line where the auxiliary boom pulley 441 is located;
s4: the position of the main power unit 37 is adjusted so that the wire rope 35 is vertically disposed while passing around the third pulley 363 and is on the same vertical line as the center of the auxiliary hoist pulley 441.
In a specific implementation, referring to fig. 2 and 3, before adjusting the length of the hydraulic cylinder 33, the main boom 32 of the main crane 3 is in an initial state, the main boom 32 being set in the first position; at this time, the moment on the main base 31 side is the center line of the vertical line where the auxiliary hanging pulley 441 is locatedThe moment on the side of the main boom 32 is +.>，
，
Wherein,is the weight of the main base 31->Is the arm of force on one side of the main base 31, i.e. the vertical distance between the center of gravity of the main base 31 and the vertical line where the auxiliary hanging pulley 441 is located, +.>For the weight of the main boom 32 +.>The arm of force on one side of the main boom 32 when the main boom 32 is in the horizontal position, i.e. the vertical distance between the center of gravity of the main boom 32 and the vertical line where the auxiliary boom pulley 441 is located; weight of main base 31->And the weight of the main boom 32>With a fixed value, the main crane 3 is kept horizontally set, and the arm of force on the main base 31 side is +.>Is a fixed value, and therefore, it is necessary to achieve balance by reducing the moment arm on one side of the main boom 32 such that the center of gravity of the main boom 3 is located on the vertical line where the auxiliary boom pulley 441 is located, i.e., adjusting the length of the hydraulic cylinder 33, so that the main boom 32 is rotated downward from the first position, and when the main boom 3 is in the lifted state, the main boom 32 needs to be set at the second position;
in a specific implementation, the length of the hydraulic cylinder 33 is adjusted to rotate the main boom 32 downwards by an angle from the first position to the second positionSo that
，
Wherein,for the main boom 32 at a rotation angle +>Arm of force on the side of the rear main boom 32, i.e. rotation angle +.>The vertical distance between the center of gravity of the rear main boom 32 and the vertical line where the auxiliary boom pulley 441 is located is: />；
The rotation angle of the main boom 32 downward from the first position to the second position is calculated by the following formula:
，
wherein,for the angle of rotation of the main boom 32 from the first position to the second position +.>As the weight of the main base 31,the moment arm on one side of the main base 31 is the vertical distance between the center of gravity of the main base 31 and the vertical line where the auxiliary hanging pulley 441 is located,for the weight of the main boom 32 +.>To the arm of force on the side of the main boom 32 when the main boom 32 is in the horizontal position, i.e. the centre of gravity of the main boom 32 is perpendicular to the vertical line in which the auxiliary boom pulley 441 is locatedA straight distance.
As shown in fig. 2 and 3, the main boom 32 is rotated downward by an angle from the first position to the second positionThereafter, the center of gravity G of the main crane 3 is moved from being located on the right side of the vertical line where the auxiliary hoist pulley 441 is located to being located on the vertical line where the auxiliary hoist pulley 441 is located.
In a specific implementation, referring to fig. 6 and 7, the connection point of the main base 31 and the main boom 32 is a first connection point 51, the connection point of the main base 31 and the hydraulic cylinder 33 is a second connection point 52, the connection point of the main boom 32 and the hydraulic cylinder 33 is a third connection point 53, and the initial length of the hydraulic cylinder 33 is calculated by the following formula:
，
the shortened length of the hydraulic cylinder 33 is calculated by the following formula:
，
the shortened length of hydraulic cylinder 33 is calculated by the following equation:
，
wherein,for the initial length of the hydraulic cylinder 33 +.>Shortened length for hydraulic cylinder 33, +.>For the shortened length of the hydraulic cylinder 33 +.>For the distance of the first connection point 51 to the second connection point 52, -/->For the distance of the first connection point 51 to the third connection point 53, -/->The angle between the line connecting the first connection point 51 and the second connection point 52 of the main boom 32 in the first position and the line connecting the first connection point 51 and the third connection point 53 of the main boom 32 in the second position is>Is the angle of rotation of the main boom 32 from the first position to the second position.
In some implementations, the main base 31 is provided with a sliding groove 3131, one end of the main boom 32 is provided with a pin 323, the pin 323 is inserted into the sliding groove 3131, and the main boom 32 is movable along the sliding groove 3131.
In some implementations, a locking mechanism 3132 is further disposed on the main base 31, where the locking mechanism 3132 is disposed at the sliding slot 3131 to block the pin 323 from moving along the sliding slot 3131;
the gravity center adjusting method further comprises the following steps: before adjusting the rotation angle of the main boom 32 from the first position to the second position, adjusting the position of the main boom 32 in the sliding groove, and moving the pin 323 to the end of the sliding groove 3131 so that the arm length of the main boom 32 extending out of the main base 31 reaches the maximum; the locking mechanism 3132 is adjusted and locked to block the pin 323 from movement.
Referring now to fig. 4 and 5, in an implementation, the locking mechanism 3132 includes a first set of locking units for blocking the pin movement when the main boom is in a first articulated position and a second set of locking units for blocking the pin movement when the main boom is in a second articulated position. In particular, the tower crane is in a working state when the main boom is in the first articulated position, and in a lifting state when the main boom is in the second articulated position.
Since the weight of the main base 31 is much greater than the weight of the main boom 32, the arm length of the main boom 32 extending out of the main base 31 is maximized, ensuring that the arm is sufficient to achieve a balance of the moment at both ends of the auxiliary boom pulley 441 by adjusting the angle of rotation of the main boom 32 from said first position to said second position.
In some implementations, the auxiliary crane 4 includes a traction rope 45 and an auxiliary power unit, the auxiliary crane pulley 441 is detachably mounted on the pulley bracket 442, a sliding shaft is arranged on the auxiliary crane 4, one end of the traction rope 45 is connected with the pulley bracket 442, and the other end bypasses the sliding shaft to be connected with the auxiliary power unit;
the gravity center adjusting method further comprises the following steps: releasing the traction rope 45 to lower the auxiliary crane pulley 441 to the main crane 3; the auxiliary crane pulley 441 is detached from the pulley bracket 442, the steel wire rope 35 is wound around the auxiliary crane pulley 441, and then the auxiliary crane pulley 441 is mounted to the pulley bracket 442; the traction rope 45 is pulled while the wire rope 35 is released, the pulley bracket 442 and the auxiliary hoist pulley 441 are lifted and the pulley bracket 442 is fixed to the auxiliary hoist 4.
The auxiliary crane pulley 441 and the pulley bracket 442 arranged on the auxiliary crane 4 are lowered to the main crane 3 through the traction rope 45, and the steel wire rope 35 is wound around the auxiliary crane pulley 441 by detaching the auxiliary crane pulley 441; then, the auxiliary crane pulley 441 and the pulley bracket 442 can be pulled to the installation position on the auxiliary crane 4 by releasing the steel wire rope 35 and tightening the pulling rope 45, so that the winding of the steel wire rope 35 is realized with convenient operation, and the working efficiency is improved.
In some implementations, the first pulley 361 and the second pulley 362 are spaced apart at an end of the main boom 32 that connects to the main base 31, the spacing between the first pulley 361 and the second pulley 362 being equal to the diameter of the auxiliary boom pulley 441;
the gravity center adjusting method further comprises the following steps: the auxiliary hoist pulley 441 is placed between the first pulley 361 and the second pulley 362; the wire rope 35 between the first pulley 361 and the second pulley 362 is wound from below the first pulley 361 to above the auxiliary hoist pulley 441 and then to below the second pulley 362, so that the wire rope 35 between the first pulley 361 and the auxiliary hoist pulley 441 and the wire rope 35 between the second pulley 362 and the auxiliary hoist pulley 441 are in a vertical state, thereby facilitating the balance of the main hoist 3.
In some implementations, the third pulley 363 is disposed on a pulley mount 38, the pulley mount 38 being fixed to the bottom of the side of the main base 31 near the main boom 32;
the gravity center adjusting method further comprises the following steps: the main power unit 37 is disposed right under the auxiliary hoist pulley 441 such that the wire rope 35 is vertically disposed while bypassing the third pulley 363 and is positioned on the same vertical line as the center of the auxiliary hoist pulley 441, thereby facilitating the balance of the main hoist 3.
Specifically, the main power unit is a winch or a winch and is arranged on the ground.
In summary, according to the gravity center adjusting method for the tower crane of the wind generating set provided by the embodiment of the invention, the rotation angle of the main suspension arm is adjusted to a proper position by adjusting the length of the hydraulic cylinder, so that the gravity center of the tower crane can be adjusted in a lifting state to realize stable work;
further, the position of the main boom is accurately adjusted by calculating the rotation angle of the main boom from the first position to the second position; further, the position of the hydraulic cylinder is precisely controlled by calculating the shortened length of the hydraulic cylinder;
further, a locking mechanism is arranged at the sliding groove to prevent the pin on the main boom from moving along the sliding groove, and a first group of locking units and a second group of locking units are arranged to prevent the pin from moving at a first hinge position and a second hinge position of the main boom respectively;
further, the steel wire rope between the first pulley and the second pulley is wound from the lower part of the first pulley to the upper part of the auxiliary hanging pulley and then to the lower part of the second pulley, and the steel wire rope between the first pulley and the auxiliary hanging pulley and the steel wire rope between the second pulley and the auxiliary hanging pulley are in a vertical state by the winding mode of the steel wire rope among the first pulley, the second pulley and the auxiliary hanging pulley, so that the crane on the tower is in a balanced state better.
Although specific embodiments have been described above, these embodiments are not intended to limit the scope of the disclosure, even where only a single embodiment is described with respect to a particular feature. The characteristic examples provided in the present disclosure are intended to be illustrative, not limiting, unless stated differently. In practice, the features of one or more of the dependent claims may be combined with the features of the independent claims where technically possible, according to the actual needs, and the features from the respective independent claims may be combined in any appropriate way, not merely by the specific combinations enumerated in the claims.

Claims (8)

1. The gravity center adjusting method for the tower crane of the wind generating set comprises a tower barrel fixed on the ground and a cabin arranged at the top of the tower barrel, and is characterized in that the tower crane comprises a main crane and an auxiliary crane for hoisting the main crane, the auxiliary crane is arranged on the cabin, and an auxiliary hoisting pulley is arranged on the auxiliary crane; the main crane comprises a main base, a main suspension arm, a hydraulic cylinder, a pulley block, a steel wire rope and a main power unit, wherein one end of the main suspension arm is movably connected with the main base, a lifting hook is arranged at the other end of the main suspension arm, the pulley block comprises a first pulley and a second pulley which are arranged on the main suspension arm, a plurality of adjusting pulleys which are arranged on the main base and a third pulley which is arranged on one side, close to the main suspension arm, of the main base, one end of the steel wire rope is connected with the lifting hook, and the other end of the steel wire rope sequentially bypasses the first pulley, the auxiliary suspension pulley, the second pulley, the plurality of adjusting pulleys and the third pulley to be connected to the main power unit;
the gravity center adjusting method comprises the following steps: the main crane is arranged below the auxiliary crane, the auxiliary crane pulley is positioned at the centers of the first pulley and the second pulley in the horizontal direction, and the first pulley and the second pulley are arranged at intervals at one end of the main boom connected with the main base; the steel wire rope bypasses the auxiliary hanging pulley and fixedly connects the auxiliary hanging pulley with the auxiliary crane; the length of the hydraulic cylinder is adjusted, and then the rotation angle of the main suspension arm is adjusted, so that the main suspension arm rotates downwards from an initial horizontal position until the gravity center of the main crane is positioned on a vertical line where the auxiliary suspension pulley is positioned; the position of the main power unit is adjusted, so that the steel wire rope is vertically arranged after bypassing the third pulley and is positioned on the same vertical line with the center of the auxiliary hanging pulley;
when the main crane is in an initial state, the main boom is arranged at a first position, and when the main crane is in a hoisting state, the main boom is arranged at a second position, and the rotation angle of the main boom from the first position to the second position is calculated by the following formula:
，
wherein,for the angle of rotation of the main boom from the first position to the second position, +.>For the weight of the main base, +.>Is the vertical distance between the gravity center of the main base and the vertical line where the auxiliary hanging pulley is located, < >>For the weight of the main boom +.>Is the vertical distance between the gravity center of the main suspension arm at the first position and the vertical line where the auxiliary suspension pulley is located.
2. The method for adjusting the center of gravity of a crane on a tower of a wind turbine generator system according to claim 1, wherein the connection point of the main base and the main boom is a first connection point, the connection point of the main base and the hydraulic cylinder is a second connection point, and the connection point of the main boom and the hydraulic cylinder is a third connection point.
3. The method for center of gravity adjustment of a crane on a wind turbine tower according to claim 2, wherein the shortened length of the hydraulic cylinder is calculated by the following formula:
，
wherein,for the shortened length of the hydraulic cylinder, +.>For the distance of the first connection point to the second connection point, +.>For the distance of the first connection point to the third connection point, +.>For the angle between the line connecting the first and the second connection point and the line connecting the first and the third connection point when the main boom is in the horizontal position->For the angle of rotation of the main boom from the first position to the second position.
4. The gravity center adjusting method for a crane on a tower of a wind generating set according to claim 1, wherein the main base is provided with a sliding groove, one end of the main boom is provided with a pin shaft, the pin shaft is inserted into the sliding groove, and the main boom is movable along the sliding groove.
5. The gravity center adjusting method for a crane on a tower of a wind generating set according to claim 4, wherein a locking mechanism is further arranged on the main base, and the locking mechanism is arranged at the sliding groove to block the pin shaft from moving along the sliding groove;
the gravity center adjusting method further comprises the following steps: before adjusting the rotation angle of the main boom from the first position to the second position, adjusting the position of the main boom in the sliding groove, and moving the pin shaft to the end part of the sliding groove so that the arm length of the main boom extending out of the main base reaches the maximum; and adjusting and locking the locking mechanism to prevent the pin shaft from moving.
6. The method for center of gravity adjustment of a crane on a tower of a wind turbine generator system according to claim 5, wherein the locking mechanism comprises a first set of locking units for blocking the pin movement when the main boom is in a first articulated position and a second set of locking units for blocking the pin movement when the main boom is in a second articulated position.
7. The method for center of gravity adjustment of a crane on a tower of a wind turbine generator system according to claim 1, wherein a distance between the first pulley and the second pulley is equal to a diameter of the auxiliary hoist pulley;
the gravity center adjusting method further comprises the following steps: placing the auxiliary hanging pulley between the first pulley and the second pulley; and winding the steel wire rope between the first pulley and the second pulley from the lower part of the first pulley to the upper part of the auxiliary hanging pulley and then to the lower part of the second pulley, so that the steel wire rope between the first pulley and the auxiliary hanging pulley and the steel wire rope between the second pulley and the auxiliary hanging pulley are in a vertical state.
8. The method for center of gravity adjustment of a crane on a tower of a wind turbine generator system according to claim 1, wherein the main power unit is a hoist or winch, and the main power unit is disposed on the ground.
CN202311313941.6A 2023-10-11 2023-10-11 Gravity center adjusting method for crane on tower of wind generating set Active CN117049402B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311313941.6A CN117049402B (en) 2023-10-11 2023-10-11 Gravity center adjusting method for crane on tower of wind generating set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311313941.6A CN117049402B (en) 2023-10-11 2023-10-11 Gravity center adjusting method for crane on tower of wind generating set

Publications (2)

Publication Number Publication Date
CN117049402A CN117049402A (en) 2023-11-14
CN117049402B true CN117049402B (en) 2024-01-23

Family

ID=88657558

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311313941.6A Active CN117049402B (en) 2023-10-11 2023-10-11 Gravity center adjusting method for crane on tower of wind generating set

Country Status (1)

Country Link
CN (1) CN117049402B (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103145051A (en) * 2013-03-13 2013-06-12 杭州国电大力机电工程有限公司 Separated hoisting device of offshore wind turbine generator, and installation method
CN105236270A (en) * 2015-10-30 2016-01-13 湖南中联重科智能技术有限公司 Gravity center detecting method, device and system for tower crane and tower crane
CN209872183U (en) * 2019-01-28 2019-12-31 中核华兴达丰机械工程有限公司 Gravity-center self-adaptive balance tower crane hoisting device
JP2020001883A (en) * 2018-06-28 2020-01-09 コベルコ建機株式会社 Crane and posture change method of crane
CN210064981U (en) * 2019-04-08 2020-02-14 无锡晟欧船舶设备有限公司 Telescopic single-arm boat and raft hanging bracket and crane
CN116022663A (en) * 2022-12-20 2023-04-28 中天科技集团海洋工程有限公司 Mobile crane with adjustable gravity center and gravity center adjusting method

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103318765B (en) * 2013-06-21 2015-01-07 林汉丁 Hoisting tilt angle, hoisting load or hoisting posture monitoring method and device as well as crane

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103145051A (en) * 2013-03-13 2013-06-12 杭州国电大力机电工程有限公司 Separated hoisting device of offshore wind turbine generator, and installation method
CN105236270A (en) * 2015-10-30 2016-01-13 湖南中联重科智能技术有限公司 Gravity center detecting method, device and system for tower crane and tower crane
JP2020001883A (en) * 2018-06-28 2020-01-09 コベルコ建機株式会社 Crane and posture change method of crane
CN209872183U (en) * 2019-01-28 2019-12-31 中核华兴达丰机械工程有限公司 Gravity-center self-adaptive balance tower crane hoisting device
CN210064981U (en) * 2019-04-08 2020-02-14 无锡晟欧船舶设备有限公司 Telescopic single-arm boat and raft hanging bracket and crane
CN116022663A (en) * 2022-12-20 2023-04-28 中天科技集团海洋工程有限公司 Mobile crane with adjustable gravity center and gravity center adjusting method

Also Published As

Publication number Publication date
CN117049402A (en) 2023-11-14

Similar Documents

Publication Publication Date Title
US10322913B2 (en) Device and method for placing a rotor blade of a wind turbine
KR102151476B1 (en) Device and method for placing components of a structure
US10988351B2 (en) Nacelle-mounted lift system for wind turbine
CN105905813B (en) A kind of wind-driven generator leaf suspender
US20220235739A1 (en) Wind turbine tower with crane connection elements and a crane with tower flange connection elements
DK201670758A1 (en) Rotor blade replacement system
WO2022175315A1 (en) Method and blade installation device for installing a blade of an offshore wind turbine
WO2022112250A1 (en) Device and method for mounting a wind turbine component on a wind turbine tower
CN117049402B (en) Gravity center adjusting method for crane on tower of wind generating set
US11787667B2 (en) Lifting assembly and a method for handling a component
CN105540409A (en) Double-blade hoisting equipment and method
TW202311625A (en) Wind turbine blade installation apparatus and method of installing a wind turbine blade
CN213059847U (en) Blade hoisting adjusting device for wind driven generator
CN213505604U (en) Tail sliding device of wind driven generator blade
CN113023572B (en) Blade lifting device and method for detaching blade and installing blade by using same
CN117105107B (en) Overturning and hoisting system for crane on tower of wind generating set
CN117049408B (en) Tower crane system for wind generating set
CN109650272B (en) Mast hoisting device
CA3206051C (en) Method of dismounting or mounting a rotor blade of a wind turbine
CN214364877U (en) Device for adjusting horizontal distance of sling of hanging basket
CN114044450B (en) Integral quick-dismantling device and method for arm support system and crane
CN220596854U (en) Protection device for building loop wheel machine
CN214192319U (en) Main hoisting mechanism for aerial hoisting system
CN220845080U (en) Hanger rack with variable pitch function
NL2032968B1 (en) System comprising a crane and method of hoisting

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant