CN110451404B - Simple turnover mechanism and turnover method for large motor rotor - Google Patents
Simple turnover mechanism and turnover method for large motor rotor Download PDFInfo
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- CN110451404B CN110451404B CN201910786460.4A CN201910786460A CN110451404B CN 110451404 B CN110451404 B CN 110451404B CN 201910786460 A CN201910786460 A CN 201910786460A CN 110451404 B CN110451404 B CN 110451404B
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- rotating shaft
- turnover
- motor rotor
- disc
- large motor
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- 230000007306 turnover Effects 0.000 title claims abstract description 94
- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 238000010276 construction Methods 0.000 abstract description 6
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000003466 welding Methods 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F19/00—Hoisting, lifting, hauling or pushing, not otherwise provided for
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Carriers, Traveling Bodies, And Overhead Traveling Cranes (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The invention discloses a simple turnover mechanism and a turnover method for a large-sized motor rotor, which solve the problem of how to reliably, stably and safely turn a heavy motor rotating shaft from a horizontal state to be vertical. A turnover pull-up lifting appliance (5) is connected to the right shaft end (4) of the large motor rotor (3), a hinged turnover frame is arranged on an operation platform (1) at the left side of the left shaft end (6) of the large motor rotor (3), a large motor rotor rotating supporting point construction frame is constructed on the ground at one side of the large motor rotor which is horizontal, one end of the large motor rotor is fixed on a rotating disc on the rotating supporting point construction frame, the rotating disc is connected with the rotating supporting shaft through mortise and tenon and welding, one end of the motor rotor is lifted by an overhead travelling crane, and the motor rotor rotates by 90 degrees around the rotating supporting point construction frame, so that the conversion from the horizontal state to the vertical state is completed. The stable rotation and the erection of the large-weight rotating shaft are realized.
Description
Technical Field
The invention relates to a turnover mechanism of a large motor rotor, in particular to a simple turnover mechanism and a turnover method of the large motor rotor.
Background
Some large motors have a rotating shaft weight of about 10 tons, a pair of single armatures needs to be sleeved on the rotating shaft, each single armature weighs about 10 tons, and the rotating shaft needs to be turned from a horizontal state to a vertical state during the hot sleeve so as to be aligned and vertically placed in each gear of the rotating shaft by the heated single armatures; in motor assembly, conventionally, a motor rotor is lifted by a double-hook crane in the air in a mode of lifting by a hook and lowering by a hook, the posture of the motor rotor is changed, the motor rotor is placed in a vertical supporting sleeve or pit, and then hot sleeve work is carried out; however, because the rotor is heavy, the risk that the lifting hook steel wire rope is separated from the guide groove exists in the inclined lifting, safety accidents are easy to occur, and the problem that how to reliably, stably and safely turn over the rotating shaft of the heavy motor from a horizontal state to be vertical becomes the urgent problem to be solved on site.
Disclosure of Invention
The invention provides a simple turnover mechanism and a turnover method for a large-sized motor rotor, which solve the technical problem of how to reliably, stably and safely turn a heavy motor rotating shaft from a horizontal state to a vertical state.
The invention solves the technical problems by the following technical proposal:
the general conception of the invention is that: a large motor rotor rotating supporting point construction frame is constructed on the ground on one side of a horizontal large motor rotor, one end of the large motor rotor is fixed on a rotating disc on the rotating supporting point construction frame, a rotating supporting shaft is connected to the rotating disc through mortise and tenon and welding, one end of the motor rotor is lifted by a crown block, and the motor rotor rotates 90 degrees around the rotating supporting point construction frame, so that the conversion from a horizontal state to an upright state is completed.
A simple turnover mechanism of a large motor rotor comprises an operation platform, wherein a large motor rotor horizontal support frame is arranged on the operation platform, the large motor rotor horizontal support frame is horizontally provided with the large motor rotor, a turnover pull-up lifting appliance is connected on the right shaft end of the large motor rotor, a turnover front support frame and a turnover rear support frame are respectively fixedly arranged on the operation platform on the left side of the left shaft end of the large motor rotor, a front V-shaped support surface is arranged on the top end surface of the turnover front support frame, a front limit door-shaped frame is arranged on the top end surface of the turnover front support frame above the front V-shaped support surface, a front rotary shaft is movably arranged between the front V-shaped support surface and the front limit door-shaped frame, a rear V-shaped support surface is arranged on the top end surface of the turnover rear support frame, a rear limit door-shaped frame is arranged on the top end surface of the rear turnover support frame above the rear V-shaped support surface, a rear rotating shaft is movably arranged between the rear V-shaped supporting surface and the rear limit door-shaped frame, the structure of the front rotating shaft is identical with that of the rear rotating shaft, a turnover disc is connected between the front rotating shaft and the rear rotating shaft, a circular positioning step is arranged on the disc surface of the turnover disc, a connecting bolt penetrating through hole is arranged at the center of the disc surface of the turnover disc, a front rotating shaft connecting lug and a rear rotating shaft connecting lug are symmetrically arranged on the outer circle of the disc surface of the turnover disc, the turnover disc is connected with the front rotating shaft through the front rotating shaft connecting lug, the turnover disc is connected with the rear rotating shaft through the rear rotating shaft connecting lug, the left shaft end of the large motor rotor is sleeved with the circular positioning step arranged on the disc surface of the turnover disc, the connecting bolt penetrates through the through hole and is fixedly connected with the left shaft end of the large motor rotor, the overhead travelling crane lifting hook is connected to the turnover pull-up lifting appliance.
The inner side face of the front rotating shaft is provided with mortise and tenon grooves, a boss in the mortise and tenon groove is arranged, a boss in the groove is arranged on the front rotating shaft connecting lug, the front rotating shaft connecting lug is inserted into the mortise and tenon groove on the front rotating shaft, and the boss in the groove is connected with the boss in the groove in a sleeved mode.
A simple overturning method of a large-sized motor rotor comprises the following steps:
the method comprises the steps of firstly, manufacturing a turnover disc, arranging a circular positioning step on the disc surface of the turnover disc, arranging a connecting bolt at the center of the disc surface of the turnover disc to penetrate through a through hole, symmetrically arranging a front rotating shaft connecting lug and a rear rotating shaft connecting lug on the outer circle of the disc surface of the turnover disc, arranging a convex table matching groove in a groove on the front rotating shaft connecting lug, and arranging a convex table matching groove in the groove on the rear rotating shaft connecting lug; manufacturing a front rotating shaft and a rear rotating shaft, arranging mortise and tenon grooves on the inner side surface of the front rotating shaft, arranging a boss in the mortise and tenon grooves, arranging the mortise and tenon grooves on the inner side surface of the rear rotating shaft, and arranging the boss in the mortise and tenon grooves; the front rotating shaft is connected with the front rotating shaft connecting lug mortise and tenon on the turning plate, mortise and tenon connecting joints are welded together, the rear rotating shaft is connected with the rear rotating shaft connecting lug mortise and tenon on the turning plate, and mortise and tenon connecting joints are welded together;
secondly, placing a turnover disc with two rotating shafts between a front turnover support frame and a rear turnover support frame, enabling the front rotating shaft to be arranged on a front V-shaped support surface, enabling the rear rotating shaft to be arranged on a rear V-shaped support surface, installing a front limiting door-shaped frame above the front rotating shaft, and installing a rear limiting door-shaped frame on the rear rotating shaft;
thirdly, connecting a turnover pull-up lifting appliance on the right shaft end of the large motor rotor, butting the left shaft end of the large motor rotor on a circular positioning step arranged on the disc surface of a turnover disc, and fixedly connecting the left shaft end of the large motor rotor with the left shaft end of the large motor rotor after the connecting bolt sequentially passes through a gasket and a bolt passes through a through hole;
and fourthly, connecting a crane lifting hook on the turnover pull-up lifting appliance, lifting the right shaft end of the large motor rotor through the crane, and turning the large motor rotor from a horizontal state to an upright state along with lifting of the crane.
The turnover mechanism adopts a hinge structure, one end of the motor rotor is fixed on the rotary disc, the rotary disc is a hinge, the other end of the motor rotor is a lifting point, the structural design is simple and reliable, the cost is low, and particularly, the mortise and tenon combination of the rotary disc and the rotary shaft is welded by adding a joint seam, so that the rotary force transmission surface is enlarged, and the stable rotation and erection of the heavy-weight rotary shaft are realized.
Drawings
FIG. 1 is a schematic view of the motor shaft of the present invention from horizontal to rotational upright;
FIG. 2 is a schematic view of the motor shaft of the present invention in an upright position;
FIG. 3 is a schematic view of the structure of the turnover support frame of the turnover table in the standing state;
fig. 4 is a schematic structural view of a turnover supporting frame of the turnover table in a horizontal state;
fig. 5 is a schematic view of the structure of the turntable 14 of the present invention;
fig. 6 is a schematic structural view of the rotary shaft of the present invention.
Detailed Description
The invention is described in detail below with reference to the attached drawing figures:
a simple turnover mechanism of a large motor rotor comprises an operation platform 1, wherein a large motor rotor horizontal support frame 2 is arranged on the operation platform 1, a large motor rotor 3 is horizontally arranged on the large motor rotor horizontal support frame 2, a turnover pull-up lifting appliance 5 is connected to a right shaft end 4 of the large motor rotor 3, an overhead crane in the air right above the large motor rotor 3 is connected with the turnover pull-up lifting appliance 5 through a lifting hook, a turnover front support frame 7 and a turnover rear support frame 11 are respectively fixedly arranged on the operation platform 1 at the left side of a left shaft end 6 of the large motor rotor 3, a front V-shaped support surface 8 is arranged on the top end surface of the turnover front support frame 7, a front limit door-shaped frame 10 is arranged on the top end surface of the turnover front support frame 7 above the front V-shaped support surface 8, a front rotating shaft 9 is movably arranged between the front V-shaped support surface 8 and the front limit door-shaped frame 10, a rear V-shaped supporting surface 12 is arranged on the top end surface of the rear overturning supporting frame 11, a rear limit door-shaped frame is arranged on the top end surface of the rear overturning supporting frame 11 above the rear V-shaped supporting surface 12, a rear rotating shaft 13 is movably arranged between the rear V-shaped supporting surface 12 and the rear limit door-shaped frame, the structure of the front rotating shaft 9 is identical to that of the rear rotating shaft 13, an overturning disc 14 is connected between the front rotating shaft 9 and the rear rotating shaft 13, a circular positioning step 15 is arranged on the disc surface of the overturning disc 14, a connecting bolt penetrating through a through hole 16 is arranged in the center of the disc surface of the overturning disc 14, a front rotating shaft connecting lug 17 and a rear rotating shaft connecting lug 18 are symmetrically arranged on the outer circle of the disc surface of the overturning disc 14, the overturning disc 14 is connected with the front rotating shaft 9 through the front rotating shaft connecting lug 17, the overturning disc 14 is connected with the rear rotating shaft 13 through the rear rotating shaft connecting lug 18, the left shaft end 6 of the large motor rotor 3 is sleeved with a circular positioning step 15 arranged on the disc surface of the turnover disc 14, a connecting bolt 19 passes through a through hole 16 through the bolt and is fixedly connected with the left shaft end 6 of the large motor rotor 3, and the turnover pull-up lifting appliance 5 is connected with a crown block lifting hook; the left shaft end 6 of the large motor rotor 3 is fixedly and firmly connected with the turning disc 14, the front rotating shaft 9 and the rear rotating shaft 13 which are fixedly connected on the turning disc 14 play a role of a hinge shaft, the front V-shaped supporting surface 8 and the front limiting door-shaped frame 10 which are arranged on the top end surface of the turning front supporting frame 7, the rear V-shaped supporting surface 12 and the rear limiting door-shaped frame which are arranged on the top end surface of the rear turning supporting frame 11 form a rotating hinge seat of the motor rotor, and the crown block pulls the right end of the motor rotor upwards through the turning pull-up lifting appliance 5 at the right end of the motor rotor, so that the motor rotor is rotationally and vertically arranged around the hinge seat.
A mortise and tenon groove 21 is formed in the inner side surface of the front rotating shaft 9, a middle groove boss 22 is arranged in the mortise and tenon groove 21, a middle groove boss matching groove 26 is formed in the front rotating shaft connecting lug 17, the front rotating shaft connecting lug 17 is inserted into the mortise and tenon groove 21 on the front rotating shaft 9, and the middle groove boss matching groove 26 is connected with the middle groove boss 22 in a sleeved mode; this kind of connection structure makes interior side 23 before mortise and tenon in mortise and tenon recess 21, interior side 25 behind mortise and tenon convex surface 24 all bear the weight of the power in the motor rotation, makes the combination of carousel 14 and rotation axis more reliable, carries out welded connection again on the surface joint seam behind rotation axis linking ear and rotation axis mortise and tenon on the carousel, has improved the reliability that rotation axis and upset were taken turns to combine greatly.
A simple overturning method of a large-sized motor rotor comprises the following steps:
firstly, manufacturing a turnover disc 14, wherein a circular positioning step 15 is arranged on the disc surface of the turnover disc 14, a connecting bolt is arranged at the center of the disc surface of the turnover disc 14 and penetrates through a through hole 16, a front rotating shaft connecting lug 17 and a rear rotating shaft connecting lug 18 are symmetrically arranged on the outer circle of the disc surface of the turnover disc 14, a groove-in-groove convex table matching groove 26 is arranged on the front rotating shaft connecting lug 17, and a groove-in-groove convex table matching groove is arranged on the rear rotating shaft connecting lug 18; manufacturing a front rotating shaft 9 and a rear rotating shaft 13, arranging mortise and tenon grooves 21 on the inner side surface of the front rotating shaft 9, arranging a middle groove boss 22 in the mortise and tenon grooves 21, arranging mortise and tenon grooves on the inner side surface of the rear rotating shaft 13, and arranging a middle groove boss in the mortise and tenon grooves; the front rotating shaft 9 is connected with the front rotating shaft connecting lug 17 on the turnover disc 14 in a mortise and tenon mode, mortise and tenon connecting joints are welded together, the rear rotating shaft 13 is connected with the rear rotating shaft connecting lug 18 on the turnover disc 14 in a mortise and tenon mode, and mortise and tenon connecting joints are welded together;
secondly, placing a turnover disc 14 with two rotating shafts between the front turnover support frame 7 and the rear turnover support frame 11, enabling the front rotating shaft 9 to be arranged on the front V-shaped support surface 8, enabling the rear rotating shaft 13 to be arranged on the rear V-shaped support surface 12, installing a front limiting door-shaped frame 10 above the front rotating shaft 9, and installing a rear limiting door-shaped frame on the rear rotating shaft 13;
thirdly, connecting a turnover pull-up lifting appliance 5 on the right shaft end 4 of the large motor rotor 3, butting the left shaft end 6 of the large motor rotor 3 on a circular positioning step 15 arranged on the disc surface of a turnover disc 14, and fixedly connecting the left shaft end 6 of the large motor rotor 3 together after sequentially penetrating through a gasket 20 and a through hole 16 by using a connecting bolt 19;
and fourthly, connecting a crown block lifting hook on the overturning and lifting sling 5, lifting the right shaft end 4 of the large motor rotor 3 through the crown block, and overturning the large motor rotor 3 from a horizontal state to an upright state along with lifting of the crown block.
Claims (3)
1. The simple turnover mechanism of the large motor rotor comprises an operation platform (1), wherein a large motor rotor horizontal support frame (2) is arranged on the operation platform (1), a large motor rotor (3) is horizontally arranged on the large motor rotor horizontal support frame (2), and the simple turnover mechanism is characterized in that a turnover pull-up lifting tool (5) is connected to a right shaft end (4) of the large motor rotor (3), a turnover front support frame (7) and a turnover rear support frame (11) are fixedly arranged on the operation platform (1) at the left side of a left shaft end (6) of the large motor rotor (3) respectively, a front V-shaped support surface (8) is arranged on the top end surface of the turnover front support frame (7), a front limit door-shaped frame (10) is arranged on the top end surface of the turnover front support frame (7) above the front V-shaped support surface (8), a front rotary shaft (9) is movably arranged between the front V-shaped support surface (8) and the front limit door-shaped frame (10), a rear V-shaped support surface (12) is arranged on the top end surface of the turnover rear support frame (11), a rear V-shaped support surface (12) is arranged on the top end surface of the turnover rear rotary shaft (12) and is arranged between the rear limit door-shaped support frame (13) and the front rotary shaft (13), a turnover disc (14) is connected between a front rotating shaft (9) and a rear rotating shaft (13), a circular positioning step (15) is arranged on the disc surface of the turnover disc (14), a connecting bolt penetrating through a through hole (16) is arranged at the center of the disc surface of the turnover disc (14), a front rotating shaft connecting lug (17) and a rear rotating shaft connecting lug (18) are symmetrically arranged on the outer circle of the disc surface of the turnover disc (14), the turnover disc (14) is connected with the front rotating shaft (9) through the front rotating shaft connecting lug (17), the turnover disc (14) is connected with the rear rotating shaft (13) through the rear rotating shaft connecting lug (18), the left shaft end (6) of the large motor rotor (3) is sleeved with the circular positioning step (15) arranged on the disc surface of the turnover disc (14), the connecting bolt (19) penetrates through the through hole (16) and is fixedly connected with the left shaft end (6) of the large motor rotor (3), and a crown block lifting hook is connected on a turnover lifting appliance (5).
2. The simple turnover mechanism of a large motor rotor according to claim 1, characterized in that mortise and tenon grooves (21) are formed in the inner side face of the front rotating shaft (9), a middle groove boss (22) is arranged in the mortise and tenon grooves (21), middle groove boss matching grooves (26) are formed in the front rotating shaft connecting lugs (17), the front rotating shaft connecting lugs (17) are inserted into the mortise and tenon grooves (21) in the front rotating shaft (9), and the middle groove boss matching grooves (26) are connected with the middle groove boss (22) in a sleeved mode.
3. A simple overturning method of a large-sized motor rotor comprises the following steps:
firstly, manufacturing a turnover disc (14), wherein a circular positioning step (15) is arranged on the disc surface of the turnover disc (14), a connecting bolt is arranged at the center of the disc surface of the turnover disc (14) and penetrates through a through hole (16), a front rotating shaft connecting lug (17) and a rear rotating shaft connecting lug (18) are symmetrically arranged on the outer circle of the disc surface of the turnover disc (14), a convex table matching groove (26) in a groove is arranged on the front rotating shaft connecting lug (17), and a convex table matching groove in a groove is arranged on the rear rotating shaft connecting lug (18); manufacturing a front rotating shaft (9) and a rear rotating shaft (13), wherein a mortise and tenon groove (21) is formed in the inner side surface of the front rotating shaft (9), a boss (22) in a groove is formed in the mortise and tenon groove (21), a mortise and tenon groove is formed in the inner side surface of the rear rotating shaft (13), and a boss in a groove is formed in the mortise and tenon groove; the front rotating shaft (9) is connected with the front rotating shaft connecting lug (17) on the turnover disc (14) through mortise and tenon, mortise and tenon connecting joints are welded together, the rear rotating shaft (13) is connected with the rear rotating shaft connecting lug (18) on the turnover disc (14) through mortise and tenon, and mortise and tenon connecting joints are welded together;
secondly, placing a turnover disc (14) with two rotating shafts between a front turnover support frame (7) and a rear turnover support frame (11), enabling a front rotating shaft (9) to be arranged on a front V-shaped support surface (8), enabling a rear rotating shaft (13) to be arranged on a rear V-shaped support surface (12), installing a front limiting door-shaped frame (10) above the front rotating shaft (9), and installing a rear limiting door-shaped frame on the rear rotating shaft (13);
thirdly, connecting a turnover pull-up lifting appliance (5) on the right shaft end (4) of the large motor rotor (3), butting the left shaft end (6) of the large motor rotor (3) on a circular positioning step (15) arranged on the disc surface of a turnover disc (14), and fixedly connecting the left shaft end (6) of the large motor rotor (3) together after sequentially penetrating through a gasket (20) and a through hole (16) by using a connecting bolt (19);
and fourthly, connecting a crown block lifting hook on the overturning and lifting sling (5), lifting the right shaft end (4) of the large motor rotor (3) through the crown block, and overturning the large motor rotor (3) from a horizontal state to an upright state along with lifting of the crown block.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201910786460.4A CN110451404B (en) | 2019-08-24 | 2019-08-24 | Simple turnover mechanism and turnover method for large motor rotor |
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CN201910786460.4A CN110451404B (en) | 2019-08-24 | 2019-08-24 | Simple turnover mechanism and turnover method for large motor rotor |
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CN110451404A CN110451404A (en) | 2019-11-15 |
CN110451404B true CN110451404B (en) | 2024-03-22 |
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CN201910786460.4A Active CN110451404B (en) | 2019-08-24 | 2019-08-24 | Simple turnover mechanism and turnover method for large motor rotor |
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Publication number | Priority date | Publication date | Assignee | Title |
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CN111017698B (en) * | 2019-12-20 | 2021-03-12 | 中铁工程装备集团有限公司 | Hoisting and overturning method for rectangular pipe joint with super-large section and applicable device thereof |
CN112152403B (en) * | 2020-09-29 | 2022-04-15 | 中广核核电运营有限公司 | Nuclear power station main pump motor rotor turning device |
CN113972803B (en) * | 2021-10-20 | 2023-12-05 | 重庆迎洲压铸有限公司 | Wind-powered electricity generation motor installing the system |
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JP2000232756A (en) * | 1999-02-12 | 2000-08-22 | Toshiba Plant Kensetsu Co Ltd | Device and method for changing direction of traction force for inserting/extracting rotor of large-sized generator |
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CN203339902U (en) * | 2013-07-08 | 2013-12-11 | 南车株洲电机有限公司 | Motor rotor roll-over stand |
CN106736078A (en) * | 2016-12-28 | 2017-05-31 | 成都中车电机有限公司 | A kind of AC traction electric motor rotor turning device |
CN210594950U (en) * | 2019-08-24 | 2020-05-22 | 中船重工电机科技股份有限公司 | Simple turnover mechanism for large motor rotor |
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2019
- 2019-08-24 CN CN201910786460.4A patent/CN110451404B/en active Active
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2000232756A (en) * | 1999-02-12 | 2000-08-22 | Toshiba Plant Kensetsu Co Ltd | Device and method for changing direction of traction force for inserting/extracting rotor of large-sized generator |
CN102423839A (en) * | 2011-09-30 | 2012-04-25 | 东方电气集团东方汽轮机有限公司 | Assistant tool for turning over steam turbine welding rotor |
CN202414991U (en) * | 2011-10-26 | 2012-09-05 | 巨力索具股份有限公司 | Novel lifting-overturning device |
CN202558443U (en) * | 2012-03-31 | 2012-11-28 | 巨力索具股份有限公司 | C-shaped rotor clamping device |
CN203339902U (en) * | 2013-07-08 | 2013-12-11 | 南车株洲电机有限公司 | Motor rotor roll-over stand |
CN106736078A (en) * | 2016-12-28 | 2017-05-31 | 成都中车电机有限公司 | A kind of AC traction electric motor rotor turning device |
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