CN116891180B - Main shaft hoisting method and auxiliary hoisting device for bulb tubular turbine unit - Google Patents

Main shaft hoisting method and auxiliary hoisting device for bulb tubular turbine unit Download PDF

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Publication number
CN116891180B
CN116891180B CN202311097103.XA CN202311097103A CN116891180B CN 116891180 B CN116891180 B CN 116891180B CN 202311097103 A CN202311097103 A CN 202311097103A CN 116891180 B CN116891180 B CN 116891180B
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China
Prior art keywords
wire rope
main shaft
steel wire
hoisting
downstream side
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CN202311097103.XA
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CN116891180A (en
Inventor
何玉婷
马振宇
祁峰
黄春平
吴伟文
郑龙
王佳明
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Guangdong Yuantian Engineering Co Ltd
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Guangdong Yuantian Engineering Co Ltd
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/12—Slings comprising chains, wires, ropes, or bands; Nets
    • B66C1/14—Slings with hooks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D3/00—Portable or mobile lifting or hauling appliances
    • B66D3/04—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage
    • B66D3/06—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage with more than one pulley
    • 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
    • Y02E10/20—Hydro energy

Abstract

The invention discloses a hoisting method and an auxiliary hoisting device for a main shaft of a bulb tubular turbine, and relates to the technical field of water turbine hoisting, wherein the hoisting method comprises the following steps of S1: preparation work before hoisting of a main shaft, S2: spindle adjustment, S3: the main shaft is lifted into the tubular seat, and S4: transfer of an aerial lifting point, S5: and disassembling the steel wire rope and the pulley. According to the invention, when the main shaft is lifted, a temporary support is not required to be erected in the runner, and the main shaft is directly lifted in the air by utilizing the matching of the main hook and the auxiliary hook.

Description

Main shaft hoisting method and auxiliary hoisting device for bulb tubular turbine unit
Technical Field
The invention relates to the technical field of water turbine hoisting, in particular to a main shaft hoisting method and an auxiliary hoisting device of a bulb tubular turbine unit.
Background
The turbine shaft and the generator shaft of the bulb tubular turbine generator set are the same shaft, namely the main shaft. The combined bearing is arranged on the main shaft, and for the main shaft with the gravity center position not on the combined bearing, the hoisting method can adopt a single hoisting point hoisting method, and the main shaft can be hoisted in place once; however, most of the main shafts have heavy gravity centers on the combined bearing, and for the main shafts, a double-lifting-point lifting method is required, so that the main shafts cannot be lifted in place at one time by the double-lifting-point lifting method, a chain block is required to be arranged between the lifting point on the upstream side of the main shafts and the main hooks to adjust the horizontal position of the main shafts, and a temporary support frame is required to be erected in a flow channel on site after the positions of the main shafts are adjusted horizontally by the chain block and used for supporting the main shafts to transfer lifting points. The double-hoisting point hoisting method needs to set up a temporary support frame, so that the construction period is long, and the main shaft of the bulb tubular turbine can not be efficiently hoisted.
Therefore, how to provide a hoisting method and an auxiliary hoisting device for a bulb through-flow type main shaft, so as to realize efficient hoisting of the bulb through-flow type main shaft, and the hoisting method and the auxiliary hoisting device become a problem to be solved by the technicians in the field.
Disclosure of Invention
The invention aims to provide a bulb tubular main shaft hoisting method and an auxiliary hoisting device, which solve the problem of low efficiency when a main shaft of a water turbine unit is hoisted by the existing double-hoisting-point hoisting method.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention provides a method for hoisting a main shaft of a bulb tubular turbine, which comprises the following steps:
s1: the method comprises the steps of preparing for working before hoisting a main shaft, detachably installing a first pulley on a main hook of a crane, detachably installing a second pulley on a downstream hoisting point of the main shaft, hanging an upstream side steel wire rope between the main hook of the crane and the upstream hoisting point of the main shaft, connecting one end of the downstream side steel wire rope on a secondary hook of the crane, and connecting the other end of the downstream side steel wire rope on the second pulley by bypassing the first pulley and the second pulley;
s2: the main shaft is adjusted, so that the main hook and the auxiliary hook of the crane in the step S1 are mutually matched, the main shaft is adjusted until the axis line of the main shaft is parallel to the horizontal plane, the downstream side steel wire rope is marked, and then the downstream side steel wire rope is locked according to the mark, so that the auxiliary hook of the crane is not stressed when the main shaft is lifted;
s3: lifting the main shaft into a tubular seat, lifting the main shaft to the same horizontal height as the tubular seat by using a main hook of a crane, and then horizontally moving the main shaft until a moving trolley at the lower side of a water guide bearing on the main shaft is contacted with a pulley track in the tubular seat;
s4: transferring an aerial lifting point, namely, pulling a downstream side steel wire rope by using an auxiliary hook of a crane to loosen the locked downstream side steel wire rope, pulling a main shaft to move in a tubular seat by using a chain block in the tubular seat, and reducing the stress of the auxiliary hook to gradually transfer the stress of the main shaft to an upstream side steel wire rope until the auxiliary hook is not stressed, so as to finish transferring the aerial lifting point;
s5: disassembling the steel wire rope and the pulley, temporarily fixing the main shaft in the tubular seat, and disassembling the upstream side steel wire rope, the downstream side steel wire rope, the first pulley and the second pulley on the main shaft; after the disassembly is completed, the main shaft is completely separated from the main hook and the auxiliary hook, so that the hoisting operation of the main shaft is completed.
Preferably, the step S1 further includes the following substeps:
s101: the main shaft is assembled, a main shaft assembling bracket is arranged at a main shaft assembling position of an installation room, the main shaft is hoisted to the main shaft assembling bracket by utilizing a bridge crane of a main factory building, and then the cleaned combined bearing, the protective cover, the water guide bearing and the flange plate are assembled on the main shaft according to the drawing requirements;
s102: a pipe-type seat is assembled, and a pulley rail and a chain block for hoisting a main shaft are arranged in the pipe-type seat;
s103: selecting a main shaft hanging point, and selecting an upstream side hanging point position and a downstream side hanging point position of the main shaft assembled in the step S101, wherein the upstream side hanging point is selected on an upstream side flange plate of the main shaft; the downstream side hanging point is selected according to the size of the main shaft and the structure of the water turbine unit, and the position of the upstream side hanging point and the position of the downstream side hanging point of the main shaft are determined;
s104: determining the length of the steel wire rope, and determining the length of the upstream side steel wire rope and the length of the downstream side steel wire rope according to the position of the upstream side hanging point and the position of the downstream side hanging point of the main shaft in S103;
s105: and determining the wire rope parameters, namely determining the diameter of the wire rope on the upstream side and the wire rope on the downstream side according to the self weight of the main shaft and the positions of the lifting point on the upstream side and the lifting point on the downstream side of the main shaft in S103, wherein the wire rope parameters comprise the maximum static tension of the wire rope and the minimum diameter of the wire rope.
Preferably, the position of the downstream side hanging point in S103 is located between the protective cover and the water guide bearing, and the distance between the position of the downstream side hanging point and the water guide bearing is not less than 200mm; when the travelling car at the lower side of the water guide bearing on the main shaft is contacted with the pulley track in the tubular seat, the horizontal distance between the downstream side steel wire rope and the inner ring of the tubular seat is not less than 500mm.
Preferably, the included angle formed by the upstream side wire rope and the downstream side wire rope in S104 is not greater than 65 °, and the length of the upstream side wire rope and the length of the downstream side wire rope are determined according to the value of the included angle formed by the upstream side wire rope and the downstream side wire rope, and the positions of the upstream side hanging point and the downstream side hanging point.
Preferably, the maximum static tension of the steel wire rope in S105 is determined by the following formula:
s is the maximum static tension of the steel wire rope, G is the weight of the main shaft during hoisting, and alpha is the angle value of an included angle formed by the steel wire rope at the upstream side and the steel wire rope at the downstream side;
the minimum diameter of the wire rope is determined by the following formula:
wherein d is the minimum diameter of the steel wire rope, C is the selection coefficient of the steel wire rope, and S is the maximum static tension of the steel wire rope;
after the maximum static tension of the steel wire rope and the minimum diameter of the steel wire rope are determined, checking the breaking force of the selected steel wire rope, and returning to the step S104 to re-determine the angle value of the included angle formed by the upstream side steel wire rope and the downstream side steel wire rope until the checking is qualified if the checking is unqualified; wherein the formula for checking the breaking force of the upstream side steel wire rope is as follows:
F 0 ≥nS
wherein F is 0 For breaking force of selected upstream side steel wire rope, n isThe safety coefficient of the selected upstream side steel wire rope is S, and the S is the maximum static tension of the steel wire rope; the breaking force of the selected upstream side steel wire rope is larger than or equal to the product of the safety coefficient of the selected upstream side steel wire rope and the maximum static tension of the steel wire rope, and the breaking force of the selected steel wire rope is judged to be qualified;
the formula for checking the breaking force of the downstream side steel wire rope is as follows:
F 1 ≥nS 1 /k
wherein F is 1 N is the safety factor of the downstream side steel wire rope, S 1 The maximum static tension of the single-strand steel wire rope is obtained, and k is the conversion coefficient of the effective breaking force of the steel wire rope.
Preferably, the second pulley is lashed to the main shaft using a rope, the lashing location being located at a hoisting point downstream of the main shaft.
The invention also provides an auxiliary hoisting device applied to the hoisting method of the main shaft of the bulb tubular turbine unit, the auxiliary hoisting device is used for assisting the second pulley to be detachably mounted at the position of the downstream hoisting point of the main shaft, the auxiliary hoisting device is I-shaped and comprises a first baffle, a second baffle and branch pipes, the first baffle and the second baffle are symmetrically connected to two sides of the branch pipes, the bottom ends of the first baffle and the second baffle are matched with the lateral peripheral surface of the main shaft, the first baffle is detachably mounted on a combined bearing, and the second baffle is positioned at the position of the downstream hoisting point of the main shaft.
Preferably, a circular tube is further installed at the top of the second baffle, and the diameter of the circular tube is larger than the thickness of the second baffle; the auxiliary lifting device is further provided with reinforcing ribs, the reinforcing ribs are right-angled triangles, vertical walls of the reinforcing ribs are connected to the round tubes and the second baffle, and horizontal walls of the reinforcing ribs are connected to the branch tubes.
Compared with the prior art, the invention has the beneficial technical effects that:
the invention relates to a method for hoisting a main shaft of a bulb tubular turbine unit and an auxiliary hoisting device, which comprise the following steps of S1: the method comprises the steps of preparing for working before hoisting a main shaft, detachably installing a first pulley on a main hook of a crane, detachably installing a second pulley on a downstream hoisting point of the main shaft, hanging an upstream side steel wire rope between the main hook of the crane and the upstream hoisting point of the main shaft, connecting one end of the downstream side steel wire rope on a secondary hook of the crane, and connecting the other end of the downstream side steel wire rope on the second pulley by bypassing the first pulley and the second pulley; s2: the main shaft is adjusted, so that the main hook and the auxiliary hook of the crane in the step S1 are mutually matched, the main shaft is adjusted until the axis line of the main shaft is parallel to the horizontal plane, the downstream side steel wire rope is marked, and then the downstream side steel wire rope is locked according to the mark, so that the auxiliary hook of the crane is not stressed when the main shaft is lifted; s3: lifting the main shaft into a tubular seat, lifting the main shaft to the same horizontal height as the tubular seat by using a main hook of a crane, and then horizontally moving the main shaft until a moving trolley at the lower side of a water guide bearing on the main shaft is contacted with a pulley track in the tubular seat; s4: transferring an aerial lifting point, namely, pulling a downstream side steel wire rope by using an auxiliary hook of a crane to loosen the locked downstream side steel wire rope, pulling a main shaft to move in a tubular seat by using a chain block in the tubular seat, and reducing the stress of the auxiliary hook to gradually transfer the stress of the main shaft to an upstream side steel wire rope until the auxiliary hook is not stressed, so as to finish transferring the aerial lifting point; s5: and disassembling the steel wire rope and the pulley, temporarily fixing the main shaft in the tubular seat, and disassembling the steel wire rope, the first pulley and the second pulley on the main shaft to finish hoisting of the main shaft.
1) The invention does not utilize the chain block to adjust when the axis of the main shaft is parallel to the horizontal plane, and the pulley is necessary equipment for hoisting the main shaft of the bulb through-flow unit, and additional purchase is not needed, so the hoisting cost of the main shaft of the bulb through-flow unit is reduced;
2) When the hoisting point is transferred, the temporary support is not erected in the hoisting point, the auxiliary hook of the crane is used for pulling the downstream side steel wire rope, so that the locked downstream side steel wire rope is loosened, the main shaft is pulled by the chain block in the tubular seat to move in the tubular seat, meanwhile, the stress of the auxiliary hook is reduced, the stress of the main shaft is gradually transferred to the upstream side steel wire rope until the auxiliary hook is not stressed, and the overhead hoisting point transfer method is completed.
Drawings
The invention is further described with reference to the following description of the drawings.
FIG. 1 is a flow chart of a method for hoisting a main shaft of a bulb through-flow unit;
FIG. 2 is a schematic structural diagram of the principal axis hoisting principle of the bulb through-flow unit of the present invention;
FIG. 3 is a schematic view of the inner structure of the tube-type seat of the present invention;
FIG. 4 is a front view of the auxiliary lifting device of the present invention;
FIG. 5 is a right side view of the auxiliary lifting device of the present invention;
fig. 6 is a left side view of the auxiliary lifting device of the present invention.
Reference numerals illustrate: 1. a main shaft; 101. a combination bearing; 102. a water guide bearing; 103. a moving trolley; 104. a flange plate; 105. a protective cover; 2. a first pulley; 3. a second pulley; 4. a main hook; 401. an upstream side wire rope; 402. an upstream side hanging point; 5. a secondary hook 501, a downstream side wire rope; 502. a downstream side suspension point; 6. a tube-shaped seat; 601. a sled rail; 602. chain block; 7. auxiliary hoisting device; 701. a first baffle; 702. a branch pipe; 703. a second baffle; 704. a round tube; 705. reinforcing ribs.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1-3, the method for hoisting the main shaft of the bulb through-flow unit comprises the following steps:
s1: the method comprises the steps of preparing for working before hoisting a main shaft 1, detachably mounting a first pulley 2 on a main hook 4 of a crane, detachably mounting a second pulley 3 on a downstream side hoisting point 502 of the main shaft 1, hanging an upstream side steel wire rope 401 between the main hook 4 of the crane and the upstream side hoisting point 402 of the main shaft 1, connecting one end of the downstream side steel wire rope 501 on a secondary hook 5 of the crane, and connecting the other end of the downstream side steel wire rope 501 on the second pulley 3 by bypassing the first pulley 2 and the second pulley 3;
specifically, the step S1 further includes the following sub-steps:
s101: the method comprises the steps of assembling a main shaft 1, installing a main shaft assembling bracket at a main shaft assembling position between installation, hoisting the main shaft 1 to the main shaft assembling bracket by using a bridge crane of a main factory building, and then assembling a cleaned combined bearing 101, a protective cover 105, a water guide bearing 102 and a flange 104 on the main shaft 1 according to drawing requirements;
s102: a pipe-type seat 6 is assembled, and a pulley rail 601 and a chain block 602 for hoisting a main shaft are installed in the pipe-type seat 6;
s103: selecting a hanging point of the main shaft 1, and selecting the position of an upstream hanging point 402 and the position of a downstream hanging point 502 for the main shaft 1 assembled in the step S101, wherein the upstream hanging point 402 is selected on a flange 104 on the upstream side of the main shaft 1; the position of the upstream side hanging point 402 and the position of the downstream side hanging point 502 of the main shaft 1 are determined by selecting the downstream side hanging point 502 according to the size of the main shaft 1 and the structure of the hydraulic turbine unit;
specifically, the position of the downstream hanging point 502 in S103 is located between the protecting cover 105 and the water guiding bearing 102, and the distance between the position of the downstream hanging point 502 and the water guiding bearing 102 is not less than 200mm; when the travelling car 103 on the lower side of the water guide bearing 102 on the main shaft 1 is in contact with the pulley track 601 in the tubular seat 6, the horizontal distance between the downstream side steel wire rope 501 and the inner ring of the tubular seat 6 is not less than 500mm.
S104: determining the length of the wire rope, and determining the length of the upstream wire rope 401 and the length of the downstream wire rope 501 according to the position of the upstream hanging point 402 and the position of the downstream hanging point 502 of the main shaft 1 in S103;
specifically, the included angle formed by the upstream wire rope 401 and the downstream wire rope 501 in S104 is not greater than 65 °, and the length of the upstream wire rope 401 and the length of the downstream wire rope 501 are determined according to the included angle value formed by the upstream wire rope 401 and the downstream wire rope 501, and the positions of the upstream hanging point 402 and the downstream hanging point 502.
If the steel wire rope is too long, the steel wire rope is contacted with the upstream side of the inner pipe of the pipe-shaped seat when the downstream side wheel of the water guide bearing does not fall on the track in the pipe-shaped seat, and the main shaft cannot move to the downstream side; if the steel wire rope is too short, the stress of the lifting points at the upstream side and the downstream side can be increased, the pulley block is selected to be bigger, the range of common equipment is exceeded, and the construction cost is increased. The selection of the length of the wire rope requires repeated accounting and the angle between the upstream and downstream hoisting points should not exceed 65 deg., and the downstream hoisting point should be reselected if necessary.
S105: wire rope parameters including maximum static tension of the wire rope and minimum diameter of the wire rope are determined, and the diameter of the upstream side wire rope 401 and the diameter of the downstream side wire rope 501 are determined according to the weight of the main shaft 1 itself and the positions of the upstream side hanging point 402 and the downstream side hanging point 502 of the main shaft 1 in S103.
Specifically, the maximum static tension of the steel wire rope in S105 is determined by the following formula:
wherein S is the maximum static tension of the steel wire rope, G is the weight of the main shaft 1 during hoisting, and alpha is the angle value of an included angle formed by the upstream side steel wire rope 401 and the downstream side steel wire rope 501;
in the lifting mechanism, the maximum working static tension of the steel wire rope is determined by the lifting load, and the lifting load refers to the gravity of the lifting mass. The lifting quality comprises the sum of the qualities of lifting devices such as a main shaft, a combined bearing, a water guide bearing, a pulley block and the like, and the weight of a lifting steel wire rope with the lifting height of less than 50m can be ignored.
The minimum diameter of the wire rope is determined by the following formula:
wherein d is the minimum diameter of the steel wire rope, C is the selection coefficient of the steel wire rope, and S is the maximum static tension of the steel wire rope;
after the maximum static tension of the steel wire rope and the minimum diameter of the steel wire rope are determined, checking the breaking force of the selected steel wire rope, and returning to the step S104 to re-determine the angle value of the included angle formed by the upstream side steel wire rope 401 and the downstream side steel wire rope 501 until the checking is qualified; wherein the breaking force check formula of the upstream side wire rope 401 is as follows:
F 0 ≥nS
wherein F is 0 N is the safety coefficient of the selected upstream side steel wire rope, and S is the maximum static tension of the steel wire rope; the breaking force of the selected upstream side steel wire rope is larger than or equal to the product of the safety coefficient of the selected upstream side steel wire rope and the maximum static tension of the steel wire rope, and the breaking force of the selected steel wire rope is judged to be qualified;
the equation for checking the breaking force of the downstream side wire rope 501 is as follows:
F 1 ≥nS 1 /k
wherein F is 1 N is the safety factor of the downstream side steel wire rope, S 1 The maximum static tension of the single-strand steel wire rope is obtained, and k is the conversion coefficient of the effective breaking force of the steel wire rope.
Specifically, the selection coefficient of the steel wire rope is related to the nominal tensile strength of the steel wire rope, and the selection coefficient is specifically shown in the following table 1:
table 1 table of correspondence between selection coefficients of wire ropes and nominal tensile strengths of wire ropes
The value of the effective breaking force conversion coefficient of the steel wire rope is 0.82.
The diameter of the wire rope at the upstream side is determined by inquiring a hardware manual according to a calculation result, wherein the wire rope is usually 6 multiplied by 37. And similarly, the downstream side steel wire rope is determined according to the strand number of the steel wire rope according to the structure of the selected pulley block.
Specifically, the second pulley 3 is bound to the main shaft 1 by means of a rope, the binding position being located at a hanging point downstream of the main shaft 1.
S2: the main shaft 1 is adjusted, so that the main hook 4 and the auxiliary hook 5 of the crane in the S1 are matched with each other, the main shaft 1 is adjusted until the axis line of the main shaft is parallel to the horizontal plane, the downstream side steel wire rope 501 is marked, and then the downstream side steel wire rope 501 is locked according to the mark, so that the auxiliary hook 5 of the crane is not stressed when the main shaft 1 is lifted;
s3: the main shaft 1 is lifted into the tubular seat 6, the main hook 4 of the crane is used for lifting the main shaft 1 to the same horizontal height as the tubular seat 6, and then the main shaft 1 is horizontally moved until the movable trolley 103 on the lower side of the water guide bearing 102 on the main shaft 1 is contacted with the pulley track 601 in the tubular seat 6;
s4: transferring an aerial lifting point, namely, pulling a downstream side steel wire rope 501 by using an auxiliary hook 5 of a crane, loosening the locked downstream side steel wire rope 501, pulling a main shaft 1 to move in a tubular seat 6 by using a chain block 602 in the tubular seat 6, and simultaneously reducing the stress of the auxiliary hook 5, so that the stress of the main shaft 1 is gradually transferred to an upstream side steel wire rope 401 until the auxiliary hook 5 is not stressed, and completing the transferring of the aerial lifting point;
s5: disassembling the wire rope and the pulley, temporarily fixing the main shaft 1 in the tubular seat 6, and disassembling the upstream side wire rope 401, the downstream side wire rope 501, the first pulley 2 and the second pulley 3 on the main shaft 1; after the disassembly is completed, the main shaft 1 is completely separated from the main hook 4 and the auxiliary hook 5, so that the hoisting operation of the main shaft 1 is completed.
The invention does not utilize the chain block to adjust when the axis of the main shaft is parallel to the horizontal plane, and the pulley is necessary equipment for hoisting the main shaft of the bulb through-flow unit, and additional purchase is not needed, so the hoisting cost of the main shaft of the bulb through-flow unit is reduced; when the hoisting point is transferred, the temporary support is not erected in the hoisting point, the auxiliary hook of the crane is used for pulling the downstream side steel wire rope, so that the locked downstream side steel wire rope is loosened, the main shaft is pulled by the chain block in the tubular seat to move in the tubular seat, meanwhile, the stress of the auxiliary hook is reduced, the stress of the main shaft is gradually transferred to the upstream side steel wire rope until the auxiliary hook is not stressed, and the overhead hoisting point transfer method is completed.
As shown in fig. 4-6, the embodiment also provides an auxiliary hoisting device for a hoisting method of a main shaft of a bulb through-flow unit, the auxiliary hoisting device 7 is configured in an i shape and is used for assisting the detachable installation of the second pulley 3 at a position of a hoisting point at the downstream of the main shaft 1, the auxiliary hoisting device 7 comprises a first baffle 701, a second baffle 703 and a branch pipe 702, the first baffle 701 and the second baffle 703 are symmetrically connected at two sides of the branch pipe 702, bottom ends of the first baffle 701 and the second baffle 703 are matched with a lateral peripheral surface of the main shaft 1, the first baffle 701 is detachably installed on the combined bearing 101, and the second baffle 703 is positioned at the position of the hoisting point at the downstream of the main shaft 1.
A circular tube 704 is further installed on the top of the second baffle 703, and the diameter of the circular tube 704 is greater than the thickness of the second baffle 703; the auxiliary lifting device is further provided with reinforcing ribs 705, the reinforcing ribs 705 are right-angled triangles, vertical walls of the reinforcing ribs 705 are connected to the round tubes 704 and the second baffle 703, and horizontal walls of the reinforcing ribs 705 are connected to the branch pipes 702.
Wherein the first baffle 701 may be mounted on said combination bearing 101 by bolts; the second pulley 3 is bound on the main shaft 1 through a rope, when the main shaft 1 is lifted, the binding position of the second pulley 3 can be changed because the main shaft is smooth, and the second baffle 703 can prevent the binding position of the second pulley 3 from being changed, thereby assisting the lifting of the main shaft 1. When the main shaft 1 is hoisted, the downstream side steel wire rope 501 is contacted with the top of the second baffle 703, and the right-angle edge of the top of the second baffle 703 can cut the downstream side steel wire rope 501, so that a major potential safety hazard exists in the main shaft hoisting operation, and therefore, when the circular tube 704 is installed at the top of the second baffle 703 and the downstream side steel wire rope 501 is contacted with the side peripheral surface of the circular tube 704, the circular tube 704 can not cut the downstream side steel wire rope 501, and the safety of the main shaft hoisting operation can be effectively improved.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The above embodiments are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solutions of the present invention should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.

Claims (8)

1. A hoisting method of a main shaft of a bulb tubular turbine unit is characterized by comprising the following steps:
s1: the method comprises the steps of preparing for working before hoisting a main shaft (1), detachably installing a first pulley (2) on a main hook (4) of a crane, detachably installing a second pulley (3) on a downstream side hoisting point (502) of the main shaft (1), hanging an upstream side steel wire rope (401) between the main hook (4) of the crane and the upstream side hoisting point (402) of the main shaft (1), connecting one end of the downstream side steel wire rope (501) on a secondary hook (5) of the crane, and connecting the other end of the downstream side steel wire rope (501) on the second pulley (3) by bypassing the first pulley (2) and the second pulley (3);
s2: the main shaft (1) is adjusted, so that a main hook (4) and an auxiliary hook (5) of the crane in the S1 are matched with each other, the main shaft (1) is adjusted until the axis line of the main shaft is parallel to the horizontal plane, the downstream side steel wire rope (501) is marked, and then the downstream side steel wire rope (501) is locked according to the mark, so that the auxiliary hook (5) of the crane is not stressed when the main shaft (1) is lifted;
s3: lifting the main shaft (1) into a tubular seat (6), lifting the main shaft (1) to the same horizontal height as the tubular seat (6) by using a main hook (4) of a crane, and then horizontally moving the main shaft (1) until a moving trolley (103) on the lower side of a water guide bearing (102) on the main shaft (1) is in contact with a pulley track (601) in the tubular seat (6);
s4: transferring an aerial lifting point, namely, pulling a downstream side steel wire rope (501) by using an auxiliary hook (5) of a crane, loosening the locked downstream side steel wire rope (501), pulling a main shaft (1) to move in a tubular seat (6) by using a chain block (602) in the tubular seat (6), reducing the stress of the auxiliary hook (5) at the same time, gradually transferring the stress of the main shaft (1) to an upstream side steel wire rope (401) until the auxiliary hook (5) is not stressed, and completing transferring the aerial lifting point;
s5: the steel wire rope and the pulley are disassembled, the main shaft (1) is temporarily fixed in the tubular seat (6), and the upstream side steel wire rope (401), the downstream side steel wire rope (501), the first pulley (2) and the second pulley (3) on the main shaft (1) are disassembled; after the disassembly is completed, the main shaft (1) is completely separated from the main hook (4) and the auxiliary hook (5), so that the hoisting operation of the main shaft (1) is completed.
2. The bulb through-flow unit spindle hoisting method according to claim 1, wherein the method comprises the following steps: the step S1 also comprises the following sub-steps:
s101: the method comprises the steps of assembling a main shaft (1), installing a main shaft assembling bracket at a main shaft assembling position between installation, hoisting the main shaft (1) to the main shaft assembling bracket by using a bridge crane of a main factory building, and then assembling a cleaned combined bearing (101), a protective cover (105), a water guide bearing (102) and a flange plate (104) on the main shaft (1) according to drawing requirements;
s102: a pipe-type seat (6) is assembled, and a pulley rail (601) and a chain block (602) for hoisting a main shaft are arranged in the pipe-type seat (6);
s103: selecting a hanging point of the main shaft (1), and selecting the position of an upstream hanging point (402) and the position of a downstream hanging point (502) of the main shaft (1) assembled in the step S101, wherein the upstream hanging point (402) is selected on a flange plate (104) on the upstream side of the main shaft (1); the downstream side hanging point (502) is selected according to the size of the main shaft (1) and the structure of the water turbine unit, and the position of the upstream side hanging point (402) and the position of the downstream side hanging point (502) of the main shaft (1) are determined;
s104: determining the length of the wire rope, and determining the length of the upstream wire rope (401) and the length of the downstream wire rope (501) according to the position of the upstream hanging point (402) and the position of the downstream hanging point (502) of the main shaft (1) in S103;
s105: determining wire rope parameters, namely determining the diameter of the upstream wire rope (401) and the diameter of the downstream wire rope (501) according to the self weight of the main shaft (1) and the positions of an upstream hanging point (402) and a downstream hanging point (502) of the main shaft (1) in S103, wherein the wire rope parameters comprise the maximum static tension of the wire rope and the minimum diameter of the wire rope.
3. The bulb through-flow unit spindle hoisting method according to claim 2, characterized by: the position of a downstream side hanging point (502) in the S103 is positioned between the protective cover (105) and the water guide bearing (102), and the distance between the position of the downstream side hanging point (502) and the water guide bearing (102) is not less than 200mm; when the travelling car (103) at the lower side of the water guide bearing (102) on the main shaft (1) is contacted with the pulley track (601) in the tubular seat (6), the horizontal distance between the downstream side steel wire rope (501) and the inner ring of the tubular seat (6) is not less than 500mm.
4. The bulb through-flow unit spindle hoisting method according to claim 2, characterized by: and an included angle formed by the upstream side steel wire rope (401) and the downstream side steel wire rope (501) in the S104 is not more than 65 degrees, and the length of the upstream side steel wire rope (401) and the length of the downstream side steel wire rope (501) are determined according to an included angle value formed by the upstream side steel wire rope (401) and the downstream side steel wire rope (501), and the positions of the upstream side hanging point (402) and the downstream side hanging point (502).
5. The hoisting method of the main shaft (1) of the bulb tubular turbine set according to claim 4, characterized in that: the maximum static tension of the steel wire rope in S105 is determined by the following formula:
wherein S is the maximum static tension of the steel wire rope, G is the weight of the main shaft (1) during hoisting, and alpha is the angle value of an included angle formed by the upstream side steel wire rope (401) and the downstream side steel wire rope (501);
the minimum diameter of the wire rope is determined by the following formula:
wherein d is the minimum diameter of the steel wire rope, C is the selection coefficient of the steel wire rope, and S is the maximum static tension of the steel wire rope;
after the maximum static tension and the minimum diameter of the steel wire rope are determined, checking the breaking force of the selected steel wire rope, and returning to the step S104 to re-determine the angle value of the included angle formed by the upstream side steel wire rope (401) and the downstream side steel wire rope (501) until checking is qualified; wherein the formula for checking the breaking force of the upstream side wire rope (401) is as follows:
F 0 ≥nS
wherein F is 0 N is the safety coefficient of the selected upstream side steel wire rope, and S is the maximum static tension of the steel wire rope; the breaking force of the selected upstream side steel wire rope is larger than or equal to the product of the safety coefficient of the selected upstream side steel wire rope and the maximum static tension of the steel wire rope, and the breaking force of the selected steel wire rope is judged to be qualified;
the formula for checking the breaking force of the downstream side wire rope (501) is as follows:
F 1 ≥nS 1 /k
wherein F is 1 N is the safety factor of the downstream side steel wire rope, S 1 The maximum static tension of the single-strand steel wire rope is obtained, and k is the conversion coefficient of the effective breaking force of the steel wire rope.
6. The bulb through-flow unit spindle hoisting method according to claim 1, wherein the method comprises the following steps: the second pulley (3) is bound on the main shaft (1) by a rope, and the binding position is positioned at a hanging point at the downstream of the main shaft (1).
7. An auxiliary hoisting device applied to the hoisting method of the main shaft of the bulb tubular turbine set according to any one of claims 1 to 6, which is characterized in that: auxiliary lifting device (7) set up to the I-shaped, including first baffle (701), second baffle (703) and branch pipe (702), first baffle (701) and second baffle (703) symmetrical connection are in the both sides of branch pipe (702), first baffle (701) with the bottom of second baffle (703) matches with the side global phase-match of main shaft (1), first baffle (701) demountable installation is on composite bearing (101), second baffle (703) are located main shaft (1) low reaches hoisting point position department.
8. The bulb through-flow unit spindle auxiliary hoisting device of claim 7, wherein: a circular tube (704) is further arranged at the top of the second baffle (703), and the diameter of the circular tube (704) is larger than the thickness of the second baffle (703); the auxiliary lifting device is further provided with reinforcing ribs (705), the reinforcing ribs (705) are right-angled triangles, vertical walls of the reinforcing ribs (705) are connected to the round tubes (704) and the second baffle plates (703), and horizontal walls of the reinforcing ribs (705) are connected to the branch tubes (702).
CN202311097103.XA 2023-08-29 2023-08-29 Main shaft hoisting method and auxiliary hoisting device for bulb tubular turbine unit Active CN116891180B (en)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0524682U (en) * 1991-05-13 1993-03-30 株式会社ジエイアール西日本テクノス Hanging tool
CN101966965A (en) * 2010-10-31 2011-02-09 江苏文德新能源有限公司 Special hanger with guide cover wheel hub and turning and hanging method
CN106015729A (en) * 2016-06-08 2016-10-12 中国十七冶集团有限公司 Reverse in-position method for vaporization flue in closed plant
CN108116983A (en) * 2017-12-29 2018-06-05 东方电气集团东方电机有限公司 A kind of heavy stay column sets main shaft hanging method and lifting auxiliary device
CN209493261U (en) * 2018-11-29 2019-10-15 大唐集团广西聚源电力有限公司检修分公司 The hanging apparatus of bulb tubular hydraulic generating set main shaft entirety
CN112645209A (en) * 2020-12-28 2021-04-13 叶进银 Synchronous overhead hoist of many steel pipes for construction
CN114180456A (en) * 2021-11-30 2022-03-15 中冶(上海)钢结构科技有限公司 Hoisting posture adjusting method for giant laterally inclined truss structure
CN218950853U (en) * 2022-10-27 2023-05-02 四川华能嘉陵江水电有限责任公司 Lifting appliance and lifting device for overturning stator

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0524682U (en) * 1991-05-13 1993-03-30 株式会社ジエイアール西日本テクノス Hanging tool
CN101966965A (en) * 2010-10-31 2011-02-09 江苏文德新能源有限公司 Special hanger with guide cover wheel hub and turning and hanging method
CN106015729A (en) * 2016-06-08 2016-10-12 中国十七冶集团有限公司 Reverse in-position method for vaporization flue in closed plant
CN108116983A (en) * 2017-12-29 2018-06-05 东方电气集团东方电机有限公司 A kind of heavy stay column sets main shaft hanging method and lifting auxiliary device
CN209493261U (en) * 2018-11-29 2019-10-15 大唐集团广西聚源电力有限公司检修分公司 The hanging apparatus of bulb tubular hydraulic generating set main shaft entirety
CN112645209A (en) * 2020-12-28 2021-04-13 叶进银 Synchronous overhead hoist of many steel pipes for construction
CN114180456A (en) * 2021-11-30 2022-03-15 中冶(上海)钢结构科技有限公司 Hoisting posture adjusting method for giant laterally inclined truss structure
CN218950853U (en) * 2022-10-27 2023-05-02 四川华能嘉陵江水电有限责任公司 Lifting appliance and lifting device for overturning stator

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