CN108471201B - Large-scale generator stator bar pulls out instrument - Google Patents
Large-scale generator stator bar pulls out instrument Download PDFInfo
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- CN108471201B CN108471201B CN201810508266.5A CN201810508266A CN108471201B CN 108471201 B CN108471201 B CN 108471201B CN 201810508266 A CN201810508266 A CN 201810508266A CN 108471201 B CN108471201 B CN 108471201B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/0006—Disassembling, repairing or modifying dynamo-electric machines
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Abstract
A large-scale generator stator bar pulling-out tool and pulling-out method, including fixed support mechanism, pulling-out mechanism; the fixed supporting mechanism comprises bases arranged at the left and right sides of the traction mechanism, the bases are matched with the appearance of the stator, supporting blocks are arranged at the upper ends of the bases, the supporting blocks are inserted into the upper ends of the stator wire slots, electromagnetic suckers and idler wheels are arranged on the end faces of the bases, and the bases are fixedly adsorbed with the stator through the electromagnetic suckers and rotate along the circumferential direction of the stator through the idler wheels; the traction mechanism comprises a base, a threaded rod is installed on the base through an upper bearing and a lower bearing, a sliding block is in threaded connection with the threaded rod, the other end of the sliding block is slidably arranged on a sliding rail of the base, two steel wire rope bayonets are installed on the sliding block, two pulleys are arranged at the upper end of the corresponding base, two ends of each steel wire rope are fixed on the corresponding steel wire rope bayonets, and the middle section bypasses the two pulleys and is sleeved on a stator bar. The invention provides a large-scale generator stator bar pulling-out tool which can improve the working efficiency of stator bar pulling-out.
Description
Technical Field
The invention relates to a tool for removing a stator bar of a generator, in particular to a tool for extracting a stator bar of a large generator.
Background
The main mode and the characteristics of the current large-scale generator set stator bar are that: the stator bar of the large-sized generator set generally adopts double-layer lap winding or double-layer wave winding, and the fixation of the bar in the iron core slot mainly comprises semiconductor putty wrapped on the surface of the bar, slot lining paper, interlayer filler strips, laminated glass cloth plates or filling belts, corrugated plates and slot wedges. In particular to ensure the groove filling rate and insulation requirement, the surface of the semiconductor non-woven fabric is coated with a thicker coating when the unit is installed, so that after the silicone rubber is solidified and expanded, the wire rod is embedded in the groove and is difficult to disassemble. At present, the large-scale generator set bar is pulled out without any molding reference experience, all operations can only be performed on site according to the conditions of the generator set, a supporting point and a lifting point are found on site, the bar is pried by a crow bar, and the upper end and the lower end of the bar are pulled out by a mode of matching a hand-pulling block with a soft sling. The following problems exist with this approach: 1. the supporting point of the crowbar is not easy to find, the insulation of the wire bar is easy to break in the process of using the crowbar, the wire bar body is even damaged, and the iron core lamination is easy to damage. 2. In order to use the chain block for hoisting, a temporary chain block hoisting point needs to be erected, and the chain block hoisting point needs to be newly erected when the chain block hoisting point is transferred to the next wire rod, so that a great deal of manpower and time are required to be input. 3. The upper end and the lower end of the chain block are adopted for pulling, so that the action point is concentrated at the end part to lead the wire rod to be stressed, and the stress concentration occurs to lead the wire rod to be bent, thereby damaging the wire rod. 4. The traditional mode is adopted to pull out the wire rod, huge manpower and time are consumed, about 6 people are usually needed to cooperate with the wire rod, and if the wire rod of the whole machine is dismounted, a plurality of months are needed.
Disclosure of Invention
The invention aims to solve the technical problem of providing a large-sized generator stator bar pulling-out tool and a pulling-out method, which can be used for pulling out any large-sized generator set stator bar. The tool can improve the working efficiency of extracting the stator bar under the condition that only the magnetic poles are extracted without hanging the rotor, greatly reduces the cost of manpower and material resources, simultaneously reduces the damage to stator laminations and other equipment facilities in the process of extracting the bar, and finally ensures the smooth development of the operation of extracting the bar and the normal operation of the equipment.
In order to solve the technical problems, the invention adopts the following technical scheme:
a large-scale generator stator bar pulling-out tool comprises a fixed supporting mechanism and a pulling mechanism; the fixed supporting mechanism comprises a base arranged at the left and right sides of the traction mechanism, the base is adaptive to the appearance of the stator, a supporting block is arranged at the upper end of the base, one end of the supporting block is in sliding connection with the base, the other end of the supporting block is inserted into the upper end of the stator slot, an electromagnetic chuck and a roller are arranged on the end face of the base, and the base is fixedly adsorbed with the stator through the electromagnetic chuck and rotates along the circumferential direction of the stator through the roller; the traction mechanism comprises a base, a threaded rod is installed on the base through an upper bearing and a lower bearing, a sliding block is in threaded connection with the threaded rod, the other end of the sliding block is slidably arranged on a sliding rail of the base, two steel wire rope bayonets are installed on the sliding block, two pulleys are arranged at the upper end of the corresponding base, two ends of each steel wire rope are fixed on the corresponding steel wire rope bayonets, and the middle section bypasses the two pulleys and is sleeved on a stator bar.
The base is hinged with the base through a door shaft.
The base is close to base one end and is equipped with U type chucking portion, and U type chucking portion both ends are equipped with the tight bar screw of clamp.
The bearing adopts a ball bearing at the two-way thrust hinge joint.
A large-scale generator stator bar extraction method is characterized in that: the method comprises the following steps:
1) Firstly, unfolding a base from a folded state, moving a supporting block forwards, inserting the supporting block into the upper end of a stator slot to enable the whole device to be hung on a stator, and tightly sucking the whole device on the upper layer of the stator through an electromagnetic chuck;
2) The device is also arranged on the lower layer of the stator in the same way;
3) Binding the steel wire ropes of the two devices at the upper end and the lower end of the wire rod respectively, then twisting the trapezoidal threaded rods of the two devices simultaneously by using an electric wrench, and enabling the sliding block to move downwards so as to pull out the wire rod by pulling the steel wire rope through the pulley;
4) Fixing the pulled-out wire rod by clamping the wire rod screw rod, then hanging the wire rod by other hanging tools, and completing the pulling-out work of one wire rod;
5) When other wire rods need to be pulled out, the supporting block is pulled out, and because the four electromagnetic chucks are arranged, the whole device is still attracted to the stator after the supporting block is pulled out, the device can freely slide left and right on the stator through the roller wheels, and the next wire rod pulling-out work is performed by repeating the steps to the proper position.
6) After the wire rod is pulled out, the base can be folded through the door shaft, so that the occupied space of the device is reduced.
The invention relates to a large-scale generator stator bar pulling-out tool, which has the following technical effects:
1) The wire rod is adsorbed and fixed through the fixed supporting mechanism, then the wire rod is pulled out by utilizing the pulling mechanism, a special lifting point is not required to be set up for pulling out the wire rod, a crowbar is not required to be used for prying, the wire rod can be better protected in the pulling process, and structures such as wire rod supporting parts are protected.
2) The electromagnetic chuck 1 is adopted in the device to be adsorbed and fixed on the inner wall of the stator, so that the size requirement on the stator is not high, the device can be used for the stator bar pulling-out work of a large-sized generator set with any specification, and the application range is wide.
3) The tool is convenient to install and move, can be simply and conveniently moved to the position where the wire rod needs to be pulled out next, is simple, stable and reliable to operate, greatly improves the working efficiency, can pull out the wire rod only by 3 people working simultaneously, and can greatly shorten the time required by pulling out the wire rod.
4) The tool is convenient for flexibly increasing the acting point of the wire rod, and can better protect the wire rod from being bent or damaged in the dismantling process.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
fig. 1 is a front view of the present invention.
Fig. 2 is a left side view of the present invention.
Fig. 3 is a top view of the present invention.
Fig. 4 is a top view of the present invention in an operative state.
Fig. 5 is a cross-sectional view at a in fig. 4.
In the figure: the wire clamping device comprises an electromagnetic chuck 1, a roller 2, a supporting block 3, a clamping wire rod screw 4, a door shaft 5, a threaded rod 6, a pulley 7, a wire rope 8, a sliding block 9, a wire rope bayonet 10, a bearing 11, a base 12, a base 13, a stator wire rod 14 and a U-shaped clamping part 15.
Detailed Description
As shown in fig. 1-5, a large-scale generator stator bar extracting tool comprises a fixed supporting mechanism and a pulling mechanism. The fixed supporting mechanism comprises two bases 12, and the two bases 12 are respectively hinged on the left and right sides of the traction mechanism through door shafts 5. The base 12 is adapted to the shape of the inner ring of the stator and is of an arc plate-shaped structure, and the curvature of the base 12 is the same as the arc degree of the inner ring of the stator. Two square holes are arranged at the upper end of the base 12 and can be used for freely inserting the supporting blocks 3, the other ends of the supporting blocks 3 can be inserted into the upper ends of the stator wire slots, the supporting blocks 3 are not stressed when the wire rods are not pulled out, the whole device is adsorbed on the stator by the electromagnetic chuck on the base 12, and the supporting blocks 3 mainly serve to bear the weight of the pulled wire rods and prevent the falling risk of the device when the electromagnetic chuck is insufficient in suction. The electromagnetic chuck 1 is respectively embedded in the upper and lower parts of the base 12 at two sides, the electromagnetic chuck 1 on the base 12 can be magnetized or demagnetized by the electromagnetic chuck switch, and when the base 12 is magnetized, the base 12 can be tightly attracted on the upper layer of the stator. The base 12 on two sides is also embedded with the roller 2, the roller 2 is positioned between the upper electromagnetic chuck 1 and the lower electromagnetic chuck 1, and the roller 2 can enable the base 12 to rotate relative to the stator.
The traction mechanism comprises a base 13, the base 13 is provided with a threaded rod 6 through an upper and lower bidirectional thrust angular contact ball bearing 11, a sliding block 9 is in threaded connection with the threaded rod 6, the other end of the sliding block is arranged on a sliding rail of the base 13 in a sliding mode, two steel wire rope bayonets 10 are arranged on the sliding block 9, two pulleys 7 are arranged at the upper end of the corresponding base 13, two ends of a steel wire rope 8 are fixed on the steel wire rope bayonets 10, and the middle section bypasses the two pulleys 7 and is sleeved on a stator bar 14.
The base 12 is hinged with the base 13 by a door shaft 5. Thereby facilitating folding and unfolding.
The base 13 is close to base 12 one end and is equipped with U type chucking portion 15, and U type chucking portion 15 both ends are equipped with clamping bar screw rod 4. After the stator bar is pulled out, the stator bar can be screwed out and locked through the clamping bar screw rods 4 at the two ends.
Working principle and process: the supporting blocks 3 are inserted into the upper ends of the stator wire slots to enable the whole device to be hung on a stator, the whole device is tightly sucked on the upper layer of the stator through the electromagnetic chuck 1, the device is used in pairs (because the wire rods are long, through vertical pulling, the quick pulling out is ensured, meanwhile, one end of the wire rod body is prevented from being damaged by unidirectional stress), one device is arranged at the upper end of the wire rod, one device is arranged at the lower end of the wire rod, when the wire rod of the stator needs to be dismantled, the upper end and the lower end of the stator are respectively provided with one device, the steel wire ropes 8 of the two devices are respectively bound at the upper end and the lower end of the wire rod, because the bidirectional angular contact ball bearing 11 can bear axial and radial forces, when the two trapezoidal threaded rods 6 of the two devices are simultaneously twisted by the electric spanner, the sliding block 9 can move upwards or downwards, so that the wire rope 8 is pulled to pull out the wire rod through the pulley 7, the wire rod is fixed by tightening the wire rod screw 4 after the wire rod is pulled out, then the wire rod is lifted out through other lifting appliances, the supporting block 3 is pulled out when other wire rods are required to be pulled out, the whole device is still sucked on the upper layer of the stator after the supporting block 3 is pulled out due to the four electromagnetic chucks, the device can slide left and right freely on the upper layer of the stator through the roller 2, the next wire rod pulling-out work is carried out by repeating the steps until the wire rod is pulled out, the base 12 can be folded through the door shaft 5 after the wire rod pulling-out work is finished, and therefore the occupied space of the device is reduced.
Claims (3)
1. A large-scale generator stator bar extraction method is characterized in that: the tool comprises a fixed supporting mechanism and a pulling mechanism; the fixed supporting mechanism comprises a base (12) arranged at the left and right sides of the traction mechanism, the base (12) is adapted to the appearance of a stator, a supporting block (3) is arranged at the upper end of the base (12), one end of the supporting block (3) is in sliding connection with the base (12), the other end of the supporting block is inserted into the upper end of a stator slot, an electromagnetic chuck (1) and a roller (2) are arranged on the end face of the base (12), and the base (12) is fixedly adsorbed with the stator through the electromagnetic chuck (1) and rotates along the circumferential direction of the stator through the roller (2); the traction mechanism comprises a base (13), wherein the base (13) is provided with a threaded rod (6) through an upper bearing (11) and a lower bearing (11), a sliding block (9) is in threaded connection with the threaded rod (6) and the other end of the sliding block is arranged on a sliding rail of the base (13), two steel wire rope bayonets (10) are arranged on the sliding block (9), two pulleys (7) are arranged at the upper end of the corresponding base (13), two ends of a steel wire rope (8) are fixed on the steel wire rope bayonets (10), and the middle section bypasses the two pulleys (7) and is sleeved on a stator bar (14);
the base (12) is hinged with the base (13) through a door shaft (5);
the method for extracting the stator bar of the large-sized generator comprises the following steps:
1), firstly unfolding a base (12) from a folded state, moving a supporting block (3) forwards, inserting the supporting block (3) into the upper end of a stator slot to enable the whole device to be hung on a stator, and tightly sucking the whole device on the upper layer of the stator through an electromagnetic chuck (1);
2) The device is also arranged on the lower layer of the stator in the same way;
3) Binding the steel wire ropes (8) of the two devices at the upper end and the lower end of the wire rod respectively, then twisting the trapezoidal threaded rods (6) of the two devices simultaneously by using an electric wrench, and enabling the sliding block (9) to move downwards so as to pull the wire rope (8) out by using the pulley (7);
4) Fixing the pulled-out wire rod by clamping the wire rod screw rod (4), then hanging the wire rod by other hanging tools, and completing the pulling-out work of one wire rod;
5) When other wire rods need to be pulled out, the supporting block (3) is pulled out, and as the four electromagnetic chucks are arranged, the whole device is still attracted to the stator after the supporting block (3) is pulled out, the device can freely slide left and right on the stator through the roller (2), and the next wire rod pulling-out work is performed by repeating the steps when the device slides to a proper position;
6) After the wire rod is pulled out, the base (12) can be folded through the door shaft (5), so that the occupied space of the device is reduced.
2. The method for extracting stator bars of a large generator according to claim 1, wherein the method comprises the steps of: the base (13) is close to base (12) one end and is equipped with U type chucking portion (15), and U type chucking portion (15) both ends are equipped with clamping bar screw rod (4).
3. The method for extracting stator bars of a large generator according to claim 1, wherein the method comprises the steps of: the bearing (11) is a bidirectional thrust angular contact ball bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810508266.5A CN108471201B (en) | 2018-05-24 | 2018-05-24 | Large-scale generator stator bar pulls out instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810508266.5A CN108471201B (en) | 2018-05-24 | 2018-05-24 | Large-scale generator stator bar pulls out instrument |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108471201A CN108471201A (en) | 2018-08-31 |
| CN108471201B true CN108471201B (en) | 2023-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810508266.5A Active CN108471201B (en) | 2018-05-24 | 2018-05-24 | Large-scale generator stator bar pulls out instrument |
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| CN (1) | CN108471201B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109639070B (en) * | 2018-12-14 | 2020-11-06 | 郑州上电电机科技发展有限公司 | Copper bar and wire-wound rotor wire pulling device |
| CN112072871B (en) * | 2020-09-15 | 2022-11-29 | 哈尔滨电机厂有限责任公司 | Process method for disassembling slot wedge and wire rod and retaining iron core of generator whole-immersed stator |
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| CN108044341A (en) * | 2017-12-21 | 2018-05-18 | 四川理工学院 | A kind of portable attaching/detaching apparatus for the dismounting of large scale equipment bottom bolts |
| CN211908607U (en) * | 2020-05-29 | 2020-11-10 | 中国长江电力股份有限公司 | Auxiliary device for mounting generator bar of large hydropower station |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208158360U (en) * | 2018-05-24 | 2018-11-27 | 中国长江电力股份有限公司 | A kind of large generator stator bar puller |
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2018
- 2018-05-24 CN CN201810508266.5A patent/CN108471201B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101540527A (en) * | 2009-04-30 | 2009-09-23 | 合肥工业大学 | Motor winding enamelled wire, iron core separation device and separation method |
| JP2013055785A (en) * | 2011-09-02 | 2013-03-21 | Nittetsu Elex Co Ltd | Disassembly method and assembly method of motor |
| CN104716788A (en) * | 2013-12-17 | 2015-06-17 | 刘远洋 | Wire drawing device suitable for disassembling waste motor stator |
| CN204408123U (en) * | 2015-03-13 | 2015-06-17 | 四川会理铅锌股份有限公司 | A kind of machine for unwinding motor windings |
| CN105048726A (en) * | 2015-08-25 | 2015-11-11 | 中国水利水电第十四工程局有限公司 | Equipment used for removing hydropower station stator bar |
| CN105099094A (en) * | 2015-08-28 | 2015-11-25 | 广东韶钢工程技术有限公司 | Hydraulic drawbench for motor coil |
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| CN108471201A (en) | 2018-08-31 |
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