Construction method for hoisting the main motor of a six-stand cold rolling mill

Abstract

This invention relates to a method for hoisting the main motor of a six-stand cold rolling mill, belonging to the technical field of hoisting construction for six-stand cold rolling mills. The main contents include: site preparation for hoisting, fabrication of temporary stator and rotor supports, selection of main hoisting wire rope clips, selection of hoisting wire ropes for the stator and rotor, installation of the main motor base plate and bearing housing, positioning the stator to the temporary stator support, installation of the extended rotor shaft, insertion of the rotor into the stator, and hoisting the stator and rotor together into position. The advantages are: avoiding displacement of the base plate during main motor positioning; preventing damage to the rotor from hoisting rope clips or temporary rotor supports; making hoisting more convenient and precise; and preventing direct collision between the stator coils and rotor core during hoisting. It is simple, easy to implement, safe, reliable, has a short construction period, and low construction cost.

Description

Technical Field

[0001] This invention belongs to the technical field of hoisting construction of a six-stand cold rolling mill, and specifically relates to a hoisting construction method for the main motor of a six-stand cold rolling mill, which is applicable to the hoisting construction of the main motor of a six-stand cold rolling mill with high construction technical difficulty and complex installation process. Background Technology

[0002] The Shougang Qian'an New Energy Vehicle Electrical Steel Six-Station Continuous Rolling Mill is the world's most advanced cold continuous rolling mill and the world's first six-stand cold continuous rolling production line, also known as the super universal crown control mill. It is installed between columns 104 and 106 on the west side of the mill span, from east to west, namely the NO.01 to NO.O6 mills. Each mill is equipped with a three-phase speed-regulating asynchronous motor, namely the main mill motor, model YZBP4500-6, with a single weight of 39t, including 12.8t for the stator, 15t for the rotor, and 11.2t for other components. For ease of transportation, the main mill motor was delivered in bulk and assembled on-site. Therefore, the hoisting of the main mill motor was one of the key and difficult points of the entire project, and the successful hoisting of the main mill motor was a milestone for the entire project. Summary of the Invention

[0003] The purpose of this invention is to provide a method for hoisting the main motor of a six-stand cold rolling mill. This method solves the problems of high safety risks, long construction period, large manpower requirements, and high construction costs associated with hoisting the main motor of a six-stand cold rolling mill. This invention provides a time guarantee for the smooth progress of the project, significantly reduces safety risks and construction costs, shortens the construction period, and ensures the accuracy of the hoisting.

[0004] To minimize the installation period, improve installation accuracy, and reduce construction costs while ensuring safety and quality, it was decided to adopt the hoisting method for the main motors of the six-stand cold rolling mill. This method fully utilizes existing construction equipment and overcomes technical difficulties. The hoisting and placement of a single main motor was completed in just one day, one day ahead of schedule. A total of six days were saved for all six main motors. The safety, quality, and accuracy of the entire hoisting process were well controlled, and various technical challenges in hoisting the main motors of the six-stand cold rolling mill were resolved. The specific construction steps are as follows:

[0005] 1. Preparation of the hoisting site

[0006] Based on the on-site construction conditions, the main motor of the rolling mill was unloaded from the truck and moved to one side of the rolling mill span, 122, after arriving at the factory. # Column up to 124 # The ground between columns needs to be cleaned and inspected, therefore the ground between columns 122# and 124# on the east side of the rolling mill span should be hardened before the main motor of the rolling mill arrives.

[0007] 2. Fabrication of temporary stator support 1 and temporary rotor support 2

[0008] To facilitate transportation, the main motor of the rolling mill is supplied in bulk and assembled on site. According to the structural form of the main motor of the rolling mill, the stator 3 and rotor 4 need to be suspended in the air before assembly can be carried out on site. Therefore, four temporary stator supports 1 and two temporary rotor supports 2 need to be made.

[0009] 3. Main hoisting wire rope buckle 5 selection

[0010] The maximum single hook weight during the hoisting of the rolling mill main motor is the sum of the weights of the rotor 4, stator 3, and hoisting beam 6. Four 3m long main hoisting wire ropes 5 are used, with the ropes forming a 60° angle at four points for hoisting. The maximum tensile force is borne by the wire ropes. (K--Safety factor of wire rope, take K=8; Q--Equipment weight; n--Number of load-bearing wire ropes, take n=4; a--Angle between horizontal lines of wire rope 60°) Calculate according to Table 7-4 of the "Mechanical Equipment Installation Engineering Manual" and select type 6×37+1. 5. Main hoisting wire rope buckle.

[0011] 4. Selection of hoisting wire rope clips for stator 3 and rotor 4

[0012] Both stator 3 and rotor 4 are hoisted at four points, with steel wire ropes bearing the maximum tension. (K--Safety factor of wire rope, take K=8; Q--Equipment weight; n--Number of wire ropes bearing the load, take n=4; a--Angle between horizontal lines of wire rope 90°) Calculation, according to Table 7-4 of the "Mechanical Equipment Installation Engineering Manual", the 6×37+1 type wire rope buckle 1 7 and wire rope buckle 2 8 for hoisting stator 3 are selected. Eight wire ropes, each 2000mm in length; the rotor 4 hoisting wire rope buckle 39 uses a 6×37+1 type. Four 2000mm long hoisting wire ropes, using a 6×37+1 type. Two pieces, each 3000mm long.

[0013] 5. Installation of the main motor base plate 11 and bearing housing 12 of the rolling mill

[0014] Install and level the main motor base plate 11 of the rolling mill, then install and align the bearing seat 12. Finally, temporarily seal the main motor base plate 11 of the rolling mill to the foundation steel bars with round steel 13 to prevent the impact force generated when the stator 1 and rotor 2 are in place from causing the main motor base plate 11 of the rolling mill to shift.

[0015] 6. Stator 3 is positioned at stator temporary support 1.

[0016] According to the structural dimensions of stator 3, install the temporary stator support 1 in place, and set a pair of wedge shims 14 on each temporary stator support 1. Use the main hoist wire rope 5 to lift the hoisting beam 6, and hang wire rope shims 7 on the four hooks on the inner side of the hoisting beam 6 respectively. Then hang a 5t hand chain hoist 15 on the wire rope shims 7. Finally, connect the 5t hand chain hoist 15 to the four lifting lugs on the stator 3 through the wire rope shims 8. Adjust the 5t hand chain hoist 15 to make the stator 3 parallel to the hoisting beam 6, and slowly lift the stator 3. Hoist the stator 3 onto the pair of wedge shims 14, and use the pair of wedge shims 14 to adjust the level of the stator 3.

[0017] 7. Rotor 4 extended shaft 16 installation

[0018] According to the structural dimensions of rotor 4, install the temporary rotor support 2 in place. Place a rubber pad 17 on each temporary rotor support 2. Use the main hoist wire rope hook 5 to lift the lifting beam 6. Suspend wire rope hooks 39 on the four hooks in the middle of the lifting beam 6, and then suspend a 5t hand chain hoist 218 on the wire rope hooks 39. Finally, connect the 5t hand chain hoist 218 to rotor 4 through wire rope hook 410. Wrap rubber pads 219 around the lifting points of rotor 4. Adjust the 5t hand chain hoist 218 so that rotor 4 is parallel to the lifting beam 6. Slowly lift rotor 4 and hoist it onto the rubber pad 17. Use a bridge crane to install the extended shaft 16 of rotor 4.

[0019] 8. Rotor 4 is inserted into stator 3.

[0020] Lift the rotor 4, move the temporary rotor support 2 to the corresponding positions at both ends of the stator 3, and set a pair of inclined shims 20 and rubber pads 17 on the temporary rotor support 2. Then, insert the rotor 4 into the stator 3 from the end where the extension shaft 16 is installed until the rotor 4 can no longer move. Use the temporary rotor support 2 to support the rotor 4, and use the pair of inclined shims 20 to level the rotor 4. Cover the entire surface of the rotor 4 core with 1.5mm thick hard paper 21 to prevent hard collisions between the rotor 4 core and the stator 3 coils during the lifting process.

[0021] Lift stator 3 and move it horizontally to the middle position of rotor 4 core. Adjust the gap between stator 3 coil and rotor 4 core. Use stator temporary support 1 to suspend stator 3 in the air, and use paired wedge shims 14 to level stator 3. Simultaneously lift stator 3 and rotor 4, and slowly lift lifting beam 6. Use 5t hand chain hoists 15 and 28 to adjust stator 3 and rotor 4, ensuring that stator 3 coil and rotor 4 core do not contact each other during lifting and lowering. After rotor 4 leaves rotor temporary support 2, move rotor temporary support 2 at one end of rotor 4 extension shaft 16 to the middle shaft of rotor 4 and level it. Then lower stator 3 and rotor 4 together onto stator temporary support 1 and rotor temporary support 2. Use a bridge crane to remove extension shaft 16.

[0022] 9. Stator 3 and rotor 4 are hoisted into place together.

[0023] Simultaneously lift stator 3 and rotor 4 again, slowly lift lifting beam 6, and use 5t hand chain hoist 15 and 5t hand chain hoist 28 to adjust the height of stator 3 and rotor 4 so that the gap between the rotor core and stator coil is always equal during the lifting and lowering process. After hoisting to the installation position, slowly lower it back down so that stator 3 and rotor 4 are in the installation position, and remove hard paper 21.

[0024] The advantages of this invention are as follows: After the main motor base plate of the rolling mill is aligned, it is temporarily sealed with round steel and foundation reinforcement to prevent displacement of the base plate during the main motor's placement; rubber pads are used for protection of the rotor during hoisting to prevent damage to the rotor from hoisting ropes or temporary rotor supports; a 5t hand-operated hoist is set up at each hoisting point for leveling during hoisting, making hoisting more convenient and precise; the entire surface of the rotor core is wrapped with hard paper to prevent direct collision between the stator coils and the rotor core during hoisting. It is simple, safe, reliable, has a short construction period, and low construction cost. Attached Figure Description

[0025] Figure 1 This is a front view of the temporary stator support. The temporary stator support is 1.

[0026] Figure 2 Left view of the temporary stator support.

[0027] Figure 3 This is a top view of the temporary stator support.

[0028] Figure 4 This is a front view of the rotor temporary support. Among them, the standing temporary support is 2.

[0029] Figure 5 This is a left view of the temporary rotor support.

[0030] Figure 6 This is an installation diagram of the main motor base plate and bearing housing of the rolling mill. The main motor base plate is 11, the bearing housing is 12, and the round steel bar is 13.

[0031] Figure 7 This is a diagram showing the sealing of the main motor base plate of the rolling mill. The main motor base plate is 11, and the round steel bar is 13.

[0032] Figure 8 This diagram shows the temporary support for stator hoisting. The components include: stator temporary support 1, stator 3, main hoisting wire rope buckle 5, hoisting beam 6, wire rope buckle one 7, wire rope buckle two 8, paired inclined shims 14, and 5t hand-operated hoist 15.

[0033] Figure 9This diagram shows the temporary support for rotor hoisting. The components include: rotor temporary support 2, rotor 4, main hoisting wire rope buckle 5, hoisting beam 6, wire rope buckle three 9, wire rope buckle four 10, rubber pad one 17, 5t hand-operated hoist two 18, and rubber pad two 19.

[0034] Figure 10 This is a diagram showing the installation of the extended shaft of the rotor. The components include: temporary rotor support 2, rotor 4, extended shaft 16, and rubber pad 17.

[0035] Figure 11 This is a diagram showing the rotor and stator. The components include: stator temporary support 1, rotor temporary support 2, stator 3, rotor 4, main hoisting wire rope buckle 5, hoisting beam 6, wire rope buckle 3 9, wire rope buckle 4 10, paired inclined shims 1 14, extended shaft 16, rubber pad 1 17, 5t hand-operated hoist 2 18, rubber pad 2 19, paired inclined shims 2 20, and hard paper 21.

[0036] Figure 12 The rotor is fed into the stator diagram. Among them, stator temporary support 1, rotor temporary support 2, stator 3, rotor 4, main hoisting wire rope buckle 5, hoisting beam 6, wire rope buckle one 7, wire rope buckle two 8, paired inclined shims one 14, 5t hand chain hoist one 15, extended shaft 16, hard paper 21.

[0037] Figure 13 Preparation diagram for dismantling the extended rotor shaft. Components include: stator temporary support 1, rotor temporary support 2, stator 3, rotor 4, main hoisting wire rope buckle 5, hoisting beam 6, wire rope buckle one 7, wire rope buckle two 8, wire rope buckle three 9, wire rope buckle four 10, 5t hand chain hoist one 15, extended shaft 16, 5t hand chain hoist two 18, and cardboard 21.

[0038] Figure 14 This is a diagram showing the removal of the rotor extension shaft. The components include: stator 3, rotor 4, extension shaft 16, and cardboard 21.

[0039] Figure 15 This is a front view of the rotor and stator being hoisted together. The components include: stator (3), rotor (4), main hoisting wire rope hook (5), hoisting beam (6), wire rope hook one (7), wire rope hook two (8), wire rope hook three (9), wire rope hook four (10), 5t hand-operated hoist one (15), 5t hand-operated hoist two (18), and cardboard (21).

[0040] Figure 16 This is a side view of the rotor and stator being hoisted together. The components are: stator 3, rotor 4, main hoisting wire rope buckle 5, hoisting beam 6, wire rope buckle one 7, wire rope buckle two 8, wire rope buckle three 9, wire rope buckle four 10, 5t hand chain hoist one 15, and 5t hand chain hoist two 18.

[0041] Figure 17This is a diagram showing the rotor and stator being hoisted and positioned together. The components include: stator (3), rotor (4), main hoisting wire rope hook (5), hoisting beam (6), wire rope hook one (7), wire rope hook two (8), wire rope hook three (9), wire rope hook four (10), rolling mill main motor base plate (11), bearing housing (12), round steel (13), 5t hand chain hoist one (15), 5t hand chain hoist two (18), and cardboard (21). Detailed Implementation

[0042] Example 1

[0043] The six-stand continuous rolling mill for electrical steel in new energy vehicles is the world's most advanced cold continuous rolling mill and the world's first six-stand cold continuous rolling production line, also known as the super universal crown control mill. It is installed between columns 104 and 106 on the west side of the mill span, from east to west, namely the NO.01 to NO.O6 mills. Each mill is equipped with a three-phase speed-regulating asynchronous motor, namely the main motor of the mill, model YZBP4500-6, with a single weight of 39t, including 12.8t for the stator, 15t for the rotor, and 11.2t for other components. For ease of transportation, the main motor of the mill was delivered in bulk and assembled on site. Therefore, the hoisting of the main motor of the mill was one of the key and difficult points of the entire project. The successful hoisting of the main motor of the mill is of milestone significance to the entire project.

[0044] To minimize the installation period, improve installation accuracy, and reduce construction costs while ensuring safety and quality, it was decided to adopt the hoisting method for the main motors of the six-stand cold rolling mill. This method fully utilizes existing construction equipment and overcomes technical difficulties. The hoisting and placement of a single main motor was completed in just one day, one day ahead of schedule. A total of six days were saved for all six main motors. The safety, quality, and accuracy of the entire hoisting process were well controlled, and various technical challenges in the hoisting of the main motors of the six-stand cold rolling mill were resolved.

[0045] 1. Preparation of the hoisting site

[0046] Based on the on-site construction conditions, after the bulk parts of the rolling mill main motor arrive at the factory, they will be unloaded and cleaned and inspected between columns 122# and 124# on the east side of the rolling mill span. Therefore, the ground between columns 122# and 124# on the east side of the rolling mill span should be hardened before the rolling mill main motor arrives.

[0047] 2. Fabrication of temporary stator support 1 and temporary rotor support 2

[0048] To facilitate transportation, the main motor of the rolling mill is supplied in bulk and assembled on site. According to the structural form of the main motor of the rolling mill, the stator 3 and rotor 4 need to be suspended in the air before assembly can be carried out on site. Therefore, four temporary stator supports 1 and two temporary rotor supports 2 need to be made.

[0049] 3. Main hoisting wire rope buckle 5 selection

[0050] The maximum single hook weight during the hoisting of the rolling mill main motor is the sum of the weights of the rotor 4, stator 3, and hoisting beam 6. Four 3m long main hoisting wire ropes 5 are used, with the ropes forming a 60° angle at four points for hoisting. The maximum tensile force is borne by the wire ropes. (K--Safety factor of wire rope, take K=8; Q--Equipment weight; n--Number of load-bearing wire ropes, take n=4; a--Angle between horizontal lines of wire rope 60°) Calculate according to Table 7-4 of the "Mechanical Equipment Installation Engineering Manual" and select type 6×37+1. 5. Main hoisting wire rope buckle.

[0051] 4. Selection of hoisting wire rope clips for stator 3 and rotor 4

[0052] Both stator 3 and rotor 4 are hoisted at four points, with steel wire ropes bearing the maximum tension. (K--Safety factor of wire rope, take K=8; Q--Equipment weight; n--Number of wire ropes bearing the load, take n=4; a--Angle between horizontal lines of wire rope 90°) Calculation, according to Table 7-4 of the "Mechanical Equipment Installation Engineering Manual", the 6×37+1 type wire rope buckle 1 7 and wire rope buckle 2 8 for hoisting stator 3 are selected. Eight wire ropes, each 2000mm in length; the rotor 4 hoisting wire rope buckle 39 uses a 6×37+1 type. Four 2000mm long hoisting wire ropes, using a 6×37+1 type. Two pieces, each 3000mm long.

[0053] 5. Installation of the main motor base plate 11 and bearing housing 12 of the rolling mill

[0054] Install and level the main motor base plate 11 of the rolling mill, then install and align the bearing seat 12. Finally, temporarily seal the main motor base plate 11 of the rolling mill to the foundation steel bars with round steel 13 to prevent the impact force generated when the stator 1 and rotor 2 are in place from causing the main motor base plate 11 of the rolling mill to shift.

[0055] 6. Stator 3 is positioned at stator temporary support 1.

[0056] According to the structural dimensions of stator 3, install the temporary stator support 1 in place, and set a pair of wedge shims 14 on each temporary stator support 1. Use the main hoist wire rope 5 to lift the hoisting beam 6, and hang wire rope shims 7 on the four hooks on the inner side of the hoisting beam 6 respectively. Then hang a 5t hand chain hoist 15 on the wire rope shims 7. Finally, connect the 5t hand chain hoist 15 to the four lifting lugs on the stator 3 through the wire rope shims 8. Adjust the 5t hand chain hoist 15 to make the stator 3 parallel to the hoisting beam 6, and slowly lift the stator 3. Hoist the stator 3 onto the pair of wedge shims 14, and use the pair of wedge shims 14 to adjust the level of the stator 3.

[0057] 7. Rotor 4 extended shaft 16 installation

[0058] According to the structural dimensions of rotor 4, install the temporary rotor support 2 in place. Place a rubber pad 17 on each temporary rotor support 2. Use the main hoist wire rope hook 5 to lift the lifting beam 6. Suspend wire rope hooks 39 on the four hooks in the middle of the lifting beam 6, and then suspend a 5t hand chain hoist 218 on the wire rope hooks 39. Finally, connect the 5t hand chain hoist 218 to rotor 4 through wire rope hook 410. Wrap rubber pads 219 around the lifting points of rotor 4. Adjust the 5t hand chain hoist 218 so that rotor 4 is parallel to the lifting beam 6. Slowly lift rotor 4 and hoist it onto the rubber pad 17. Use a bridge crane to install the extended shaft 16 of rotor 4.

[0059] 8. Rotor 4 is inserted into stator 3.

[0060] Lift the rotor 4, move the temporary rotor support 2 to the corresponding positions at both ends of the stator 3, and set a pair of inclined shims 20 and rubber pads 17 on the temporary rotor support 2. Then, insert the rotor 4 into the stator 3 from the end where the extension shaft 16 is installed until the rotor 4 can no longer move. Use the temporary rotor support 2 to support the rotor 4, and use the pair of inclined shims 20 to level the rotor 4. Cover the entire surface of the rotor 4 core with 1.5mm thick hard paper 21 to prevent hard collisions between the rotor 4 core and the stator 3 coils during the lifting process.

[0061] Lift stator 3 and move it horizontally to the middle position of rotor 4 core. Adjust the gap between stator 3 coil and rotor 4 core. Use stator temporary support 1 to suspend stator 3 in the air, and use paired wedge shims 14 to level stator 3. Simultaneously lift stator 3 and rotor 4, and slowly lift lifting beam 6. Use 5t hand chain hoists 15 and 28 to adjust stator 3 and rotor 4, ensuring that stator 3 coil and rotor 4 core do not contact each other during lifting and lowering. After rotor 4 leaves rotor temporary support 2, move rotor temporary support 2 at one end of rotor 4 extension shaft 16 to the middle shaft of rotor 4 and level it. Then lower stator 3 and rotor 4 together onto stator temporary support 1 and rotor temporary support 2. Use a bridge crane to remove extension shaft 16.

[0062] 9. Stator 3 and rotor 4 are hoisted into place together.

[0063] Simultaneously lift stator 3 and rotor 4 again, slowly lift lifting beam 6, and use 5t hand chain hoist 15 and 5t hand chain hoist 28 to adjust the height of stator 3 and rotor 4 so that the gap between the rotor core and stator coil is always equal during the lifting and lowering process. After hoisting to the installation position, slowly lower it back down so that stator 3 and rotor 4 are in the installation position, and remove hard paper 21.

Claims

1. A hoisting construction method of a main motor of a rolling mill of a six-stand tandem cold rolling mill train, characterized by, The specific construction steps are as follows: 1) hoisting site preparation Rolling mill main motor bulk piece arrives at the plant and is unloaded to the rolling mill span side 122 # Column to 124 # Cleaning and acceptance between columns, so the rolling mill span east side 122 # Column to 124 # The ground between the columns should be hardened before the rolling mill main motor arrives. 2) temporary support (1) for stator and temporary support (2) for rotor The stator (3) and the rotor (4) need to be assembled in the air during on-site core threading assembly, so four temporary supports (1) for stator and two temporary supports (2) for rotor need to be made; 3) selection of main hoisting wire rope buckle (5) The maximum single hook weight of the main motor hoisting is the sum of the weight of the rotor (4), the stator (3) and the hoisting beam (6), which is hoisted by four 3m long main hoisting wire rope buckles (5) with four points at 60° The calculation is as follows: K = 8; Q is the weight of the equipment; n is the number of wire rope supporting ropes, n = 4; a is the included angle between the horizontal lines of the wire rope, 60°, and the main hoisting wire rope buckle (5) of 6×37+1 type is selected ​ 4) selection of hoisting wire rope buckle for stator (3) and rotor (4) The stator (3) and the rotor (4) are all hoisted by four points, and bear the maximum tension through steel wire ropes The calculation is as follows: K is the safety factor of the steel wire rope, K=8; Q is the weight of the equipment; n is the number of the steel wire ropes, n=4; a is the included angle between the horizontal lines of the steel wire rope, a=90°; the first and second steel wire rope buckles (7) and (8) for hoisting the stator (3) are selected from 6×37+1 type The length is 2000 mm, and there are eight steel wire ropes in total; the third steel wire rope buckle (9) for hoisting the rotor (4) is selected from 6×37+1 type The length is 2000 mm, and there are four steel wire ropes in total; the fourth steel wire rope buckle (10) for hoisting is selected from 6×37+1 type The length is 3000 mm, and there are two steel wire ropes in total 5) installation of mill main motor base plate (11) and bearing seat (12) The mill main motor base plate (11) is installed in place and leveled, and then the bearing seat (12) is installed and leveled. Finally, the mill main motor base plate (11) is temporarily fixed with the foundation reinforcement through round steel (13) to prevent the impact force generated when the stator (3) and the rotor (4) are in place from causing the mill main motor base plate (11) to be displaced; 6) stator (3) is positioned on the temporary support (1) for stator According to the structure and size of the stator (3), the temporary support (1) for stator is installed in place. A pair of diagonal shims (14) are arranged on each temporary support (1) for stator. The main hoisting wire rope buckle (5) is used to lift the hoisting beam (6). The steel wire rope buckle (7) is hung on the four hooks on the inner side of the hoisting beam (6). The 5t hand-operated hoist (15) is hung on the steel wire rope buckle (7). Finally, the 5t hand-operated hoist (15) is connected with the four lifting lugs on the stator (3) through the steel wire rope buckle (8). Adjust the 5t hand-operated hoist (15) to make the stator (3) parallel to the hoisting beam (6). Lift the stator (3) and hang it on the pair of diagonal shims (14). Adjust the levelness of the stator (3) by using the pair of diagonal shims (14); 7) installation of rotor (4) extension shaft (16) According to the structure and size of the rotor (4), the temporary support (2) for rotor is installed in place. An rubber pad (17) is arranged on each temporary support (2) for rotor. The main hoisting wire rope buckle (5) is used to lift the hoisting beam (6). The steel wire rope buckle (9) is hung on the four hooks in the middle of the hoisting beam (6). The 5t hand-operated hoist (18) is hung on the steel wire rope buckle (9). Finally, the 5t hand-operated hoist (18) is connected with the rotor (4) through the steel wire rope buckle (10). The rubber pad (19) is wound around the lifting point of the rotor (4). Adjust the 5t hand-operated hoist (18) to make the rotor (4) parallel to the hoisting beam (6). Lift the rotor (4) and hang it on the rubber pad (17). The bridge crane is used to install the rotor (4) extension shaft (16); 8) rotor (4) is threaded into the stator (3) Lifting the rotor (4), the rotor temporary support (2) is moved to the corresponding position at both ends of the stator (3) and a pair of inclined pads two (20) and rubber pad one (17) are arranged on the rotor temporary support (2), then the rotor (4) is passed into the stator (3) from the end of the installed lengthened shaft (16) until the rotor (4) cannot be moved any more, the rotor (4) is lifted by the rotor temporary support (2), the rotor (4) is leveled by the pair of inclined pads two (20), the surface of the rotor (4) core is wrapped by 1.5mm thick hard paper (21) to prevent hard collision between the rotor (4) core and the stator (3) coil during lifting; Lifting the stator (3), the stator (3) is translated to the middle position of the rotor (4) core, the gap between the stator (3) coil and the rotor (4) core is adjusted, the stator (3) is lifted by the stator temporary support (1), the stator (3) is leveled by the pair of inclined pads one (14); at the same time, the stator (3) and the rotor (4) are lifted, the lifting beam (6) is lifted, the 5t hand-operated hoist one (15) and the 5t hand-operated hoist two (18) are used to adjust the stator (3) and the rotor (4), so that the stator (3) coil and the rotor (4) core do not contact during lifting and falling, after the rotor (4) leaves the rotor temporary support (2), the rotor temporary support (2) at the end of the lengthened shaft (16) of the rotor (4) is moved to the middle shaft position of the rotor (4) and leveled, then the stator (3) and the rotor (4) are lowered together on the stator temporary support (1) and the rotor temporary support (2); the lengthened shaft (16) is removed by the bridge crane; 9) The stator (3) and the rotor (4) are lifted together and positioned The stator (3) and the rotor (4) are lifted together again, the lifting beam (6) is lifted, the 5t hand-operated hoist one (15) and the 5t hand-operated hoist two (18) are used to adjust the height of the stator (3) and the rotor (4), so that the gap between the rotor core and the stator coil is always equal during lifting and falling, the lifting is lowered after running to the installation position, so that the stator (3) and the rotor (4) are positioned at the installation position, and the hard paper (21) is removed.

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