Sanci Complete motor assembly process

Inspect and clean the installation accessories 

1 Stator: The appearance is clean and free of defects, bruises and clips. The wire slots are straight and free of burrs and clips. The inside of the slots is smooth and free of burrs and clips. The warped pieces at both ends of the slots should be knocked flat. Use compressed air to blow away the dust and dirt on the surface inside and outside of the stator.

2Rotor: The appearance should be clean and without defects or damages. The blades on the short-circuit rings at both ends should be intact.
There should be no breakage, the balance weight should not be higher than the end ring surface, the shaft end keyway and the fan blade retaining ring groove should be intact. Use compressed air to blow away the dust on the surface.

3 Casing: The appearance should be neat and without defects, the heat sink should be intact, and the bolt holes of the end cover and the screw holes of the outlet box should be tapped.
The threads are intact and use high-pressure air to blow away the dust on the surface and the iron filings in the screw holes.

4 End cover: no defects in appearance, no cracks in the bearing chamber, assembly holes intact, and tapping of the fan cover assembly holes intact. The tapping of the screw holes of the centrifugal switch positioning platform of the single-phase motor end cover is intact, and the dust on the surface and the iron filings in the screw holes are blown away with high-pressure air.

5 Fan cover: No serious defects on the appearance, slight bumps and depressions can be flattened with a small hammer.

6 Fan blades: The appearance is intact, without broken blades or cracks, and the shaft hole is intact without cracks.

7 Terminal block: The height specifications of the six terminal blocks of three-phase should be consistent. The terminal bolts should be vertical and spaced uniformly. The insulating material adhering to the bolts should be scraped off with a hacksaw blade. The terminal bolts, connecting plates and terminal screws on the single-phase terminal block should be intact.

8 Stator winding: The embedded wire stator should be well insulated, the end winding should not be deformed or damaged, the bell mouth should be intact, the paint scars on the inner and outer surfaces of the stator should be scraped off with a paint scraper, and the dust and paint residue adhering to the surface of the winding should be blown away.

9 Winding die: There should be no deformation after the whole set of wire dies are closed, and the die core and the groove wall should fit tightly.

10 Coil: The coil should meet the requirements, the coil itself should be well insulated, and the insulating paint film should not be burnt or brittle.Check for scars, bubbles, etc., and whether the number of pole phase groups and the number of turns per slot meet the requirements.

11. Check whether all accessories meet the corresponding specifications, such as insulation materials, junction boxes, etc. should meet the specifications and be clean.
Clean.

Winding 

2.Prepare winding tools, commonly used winding tools: scissors, needle-nose pliers, elbow scissors, open-end wrench, clamping plate, micrometer, turns detector, winding mold, pay-off stand, etc

3.Install the entire wire mold on the square shaft of the winding machine, lock the clamping nut, and install the electromagnetic wire on the pay-off frame. The directions of the pay-off frame and the winding machine should be opposite. When multiple wires are wound together, the pay-off frames should be close together. . Leave an appropriate length at the beginning of the electromagnetic wire, fix the left end on the winding machine shaft on the screw, put the electromagnetic wire into the wire groove of the first plate on the left side of the wire mold and straighten the electromagnetic wire along the groove shape. Then, turn on the motor switch, clear the counter first, wrap the electromagnetic wire with a paraffin-soaked felt pad, maintain a certain tension, turn on the clutch, and start winding the first coil. When winding, the pulling force must be uniform and should not be too loose or too tight. The electromagnetic wires should be arranged neatly and compactly in the slots and cannot cross. You should be careful and careful, focus on the counter, and stop immediately when the reading on the counter is equal to the required number of turns. The electromagnetic wire is introduced from the wire trough to the adjacent right slot and then the second coil is wound. Wind it in the same way. The third and fourth coils are wound until the wire mold is full. When parking and binding, use elbow scissors to clamp the binding tape from the binding groove of the template, insert it and tie two slip knots. The straight part of each coil must be tied. Then leave The foot and tail wire should not be too long or too short. Cut the electromagnetic wire at the straight end of the coil. Loosen the clamping nut, withdraw the wire mold clamping plate in order, withdraw one splint and take out a coil, and remove the remaining tail wire. The whole mold coil is tied into one phase winding. After the coil is removed, it must be installed in a cage lined with clean and dry paper or in a clean plastic turnover box. Dust-proof, waterproof, and oil-proof protection measures should be taken.

4.Specifications and turns table of electromagnetic wires for each model of motor winding

slot paper

1.Place the cleaned stator vertically on the work surface, use insulating material of the same specification as the stator, overlap the film and non-woven groove paper at a ratio of 1:1 and insert it into the groove. The film is close to the groove wall on the outside, and the groove paper extends out at both ends. The sizes are equal and the groove paper should not expose the notch.

Rule

1.Prepare wire embedding tools: wire crimping board, wire management board (also known as scratcher), special tools for slotting wedges, small hammer, elbow scissors, needle-nose pliers, and stator sleepers. 

2.Prepare materials: slot wedges, slot insulation, interlayer insulation , end phase insulation, coils, etc.

3.Arrange the workbench and keep it dry, clean, and free of dust, iron filings, impurities, etc. Place the stator with the grooved paper inserted on the crescent-shaped sleeper, and the two ends of the grooved paper should be equal. Pay attention to check whether the groove paper and film are inserted incorrectly. If they are found to be incorrect, they should be rearranged and the coil should be placed on the left side of the stator

4.Specifications and turns table of electromagnetic wires for each model of motor winding:The wire embedding generally adopts the backward type. According to the winding form, the coil with the lead wire in the one-phase coil is usually embedded first. For the two-pole motor, the coil width should be slightly compressed before embedding the wire, so that the coil width is slightly smaller than the inner diameter of the stator core. Smaller, and at the same time, squeeze the lower side wire to be embedded as flat as possible. For single-layer windings, insert two pieces of guide paper, push it into the slot along the guide paper, and catch it with your right hand at the other end of the stator, as far as possible Pull the lower edge into the slot at a time. A few undrawn wires can be scored into the slot with a scribing board. Cover the corresponding slot cover and slot wedge. When the slot is very full, use a crimping plate to compact the wires. , then cover the slot cover, insert the chamfered end of the slot wedge into the slot and gently drive it in with a small hammer. The dimensions of the two ends of the slot wedge should be equal. After the lower edge is embedded, the upper edge wires can be arranged according to the coil pitch and inserted into the slot as much as possible with both hands. Then use a marking board to gently mark the unslotted wires into the slot along the direction of the slot. Mark the line. When marking, you should pay attention to whether the two lead wire slot papers are scratched. If they are scratched, replace the slot paper. Do not damage the wire insulation. Do not touch the slot core when marking. When the upper and lower layers of a coil are embedded in the slot, , the extended parts at both ends of the winding should be equal. For the double-layer winding, after the lower edge of the coil is embedded, the insulation between the layers should be padded without sealing the groove. When padding the layers, pay attention to cover all the wires on the lower edge. After the upper edge of the other phase coil is embedded, remove the insulation that exceeds the slot surface of the core. Cut off the groove paper with elbow scissors. Then, use a crimping board to fold the groove paper to seal the groove, and then drive in the groove wedge. The wire embedding method is the same as above. The double-layer winding uses wide groove paper. When embedding the wire, the wire is directly pushed and pulled along the groove paper into the groove, or a scribing board is used to mark it into the groove, without the need for lead groove paper. 4.2.2 When embedding wires, attention should be paid to the connection method of the connecting wires of the pole phase group coils. For small motors, one phase winding is used. When there is no joint, the inlay wires should be connected as follows: the lower layer edge is connected to the lower layer edge, and the upper layer edge is connected to the upper layer edge. When threading, pay attention to the wiring method, follow the wiring method of the winding type, and operate carefully. Don’t be careless. Before inserting wires, you need to know the number of stator slots, the number of poles, and the winding type. After embedding, check the sealing condition and stack them neatly on the pallet. 

5.Y90S-2 Y90L-2 (three-phase motor) 

      Number of stator slots: 18 slots Number of poles: 2 poles     

       Number of slots per pole per phase: q=3       

       Pitch: y1=1~9 (two) y2=1~8 (one) Winding type: single-layer crossed winding, three coils per phase 

6.First, connect the lower edge of the two large coils (commonly known as double coils) with lead wires in one phase according to the instructions in 4.4.Method, embed in slot 9 (because y1=1~9), the upper edge 1# slot cannot be embedded temporarily. Cover the long slot cover and make the slot wedge (commonly known as slot sealing); then embed the lower edge of the other large coil into the 10# slot, cover the short slot cover and seal the slot, leaving the upper edge unembedded.

7. Leave one slot (11# slot) empty and do not embed it. Embed the lower edge of the second phase small coil (commonly known as single coil) with lead wire into the 12# slot, cover the long slot cover to seal the slot, and do not embed the upper edge. Tie the upper edges of the three coils with binding tape (commonly known as hanging handles) and pad the contact with the core with paper.

8. Leave two more slots empty (13# and 14# slots), embed the lower edge of the lead wires of the two large coils of the third phase into the 15# slot, cover the long slot cover and seal the slot. At this time, the upper edge should be embedded in the 7# slot according to the pitch y1=1~9 (i.e. y=8) of the large coil, cover the short slot cover and seal the slot, and pad the interphase insulation paper; then embed the lower edge of the other large coil into the 16# slot and seal the slot, and embed the upper edge into the 8# slot and seal the slot according to the pitch y=1~9, and tidy up the ends to facilitate the embedding of the next coil.

9. Leave another slot empty (17# slot), embed the lower edge of the first phase small coil to be led into the 18# slot, cover the long slot cover and seal the slot; then, according to the pitch of the small coil y2=1~8 (i.e. y=7), embed the upper edge into the 11# slot and seal the slot, pad the interphase insulation paper. Arrange the ends to facilitate the embedding of the next coil.

10. Leave two more slots empty (1# and 2# slots), embed the lower edges of the two large coils of the second phase with lead wires into the 3# slot, cover the slots with the long slot cover, and embed the upper edges into the 13# slot according to the pitch of the large coils; then embed the other coils into the 4# and 14# slots respectively, pad the interphase insulation paper, and tidy up the ends to separate them from the next coil and embed them.

11. Leave another slot empty (5# slot), embed the lower edge of the third phase small coil with lead wire into the 6# slot, cover the long slot cover to seal the slot, and embed the upper edge into the 17# slot according to y=1~8 to seal the slot. Pad the interphase insulation paper and tidy up the ends.

12. Insert the upper side of the first phase hanger coil into the 1# and 2# slots according to the large pitch y=1~9, seal the slots, pad the interphase insulation paper, and tidy up the ends.

13. Finally, embed the upper side of the second phase’s suspension coil into the 5# slot and seal it according to y=1~8, pad the interphase insulation paper, and the entire winding is embedded.

14.After the entire winding is embedded, check whether the sealing slot is intact and tidy up the end phase insulation paper and
Long slot covers are alternated to facilitate shaping. 4.6 Y100L-2 (three-phase motor) Number of stator slots: 24 Number of poles: 2 Number of slots per pole per phase: q=4 Pitch: y1=1~12 y2=2~11
Winding type: Single-layer concentric type, 4 coils per phase

17.Leave two more slots empty (17# and 18# slots) and embed the lower edge of the small coil with lead wires of the first group of coils of the third phase
Insert into slot 19, cover the long slot cover and seal the slot, and according to y2=2~11, embed the upper edge of the small coil into slot 10 and seal the slot, then embed the lower edge of the large coil in the group of coils into slot 20 and seal the slot, and according to y1=1~12, embed the lower edge of the large coil into slot 9 and seal the slot, pad the phase insulation, tidy up the ends, and facilitate the embedding of the next coil.

18. Leave two more slots empty (slots 21# and 22#), embed the lower edge of the coil with lead wires of the second coil of the first phase into slot 23, and cover the long slot cover. Embed the upper edge of the small coil into slot 14# according to the small pitch y2=2~11, then embed the lower edge of the large coil into slot 24, and embed the upper edge into slot 13 according to the large pitch y1=1~12, pad the interphase insulation, and tidy up the ends for easy embedding of the next coil. 

19.Leave two more slots empty (slots 1# and 2#) and embed the lower edge of the small coil with lead wire of the second phase into slot 3, cover the long slot cover and seal the slot; embed the upper edge into slot 18 according to y2=2~11 and seal the slot. Then embed the lower edge of the large coil into slot 4 and seal the slot, embed the upper edge into slot 17 according to y1=1~12 and seal the slot, and pad the interphase insulation. Arrange the ends to facilitate the embedding of the next coil. 

20.Leave two more slots empty (5# and 6# slots) and embed the lower edge of the small coil with lead wire of the second group of coils of the third phase into slot 7, cover the long slot cover and seal the slot, embed the upper edge into slot 22 according to y2=2~11 and seal the slot, then embed the lower edge of the large coil into slot 8 and seal the slot, embed the upper edge into slot 21 according to y1=1~12 and seal the slot, and pad the phase-to-phase insulation. Arrange the ends. 

21. Insert the upper edge of the first group of coils of the first phase into slots 1 and 2 according to the corresponding pitch, and pad the phases.
Insulation. 

22. Finally, follow the same procedure as above, embed the upper edge of the first set of coils of the second phase, pad the phase-to-phase insulation, tidy up the end insulation, long slot cover cross-phase insulation, and check the stator slot sealing condition.

25.eave two slots empty (17# and 18# slots). Insert the lower edge of the small coil with lead wire of the second phase second group into slot 19 and cover the slot with the long slot cover. The upper edge cannot be inserted either (start the handle). Then insert the lower edge of the large coil into slot 20 and seal the slot. The upper edge cannot be inserted either (because q=5). 

26. Leave three more slots empty (slots 21#, 22#, and 23#), embed the smallest loop of the first group of coils of the third phase with the lower edge of the lead wire into slot 24 and seal the slot, cover the long slot cover and seal the slot, and embed the upper edge into slot 13 according to y=3~14 and seal the slot, pad the phase insulation, then embed the lower edge of the small loop into slot 25 and seal the slot, and embed the upper edge into slot 12 according to y=2~15, then embed the lower edge of the large loop into slot 26 and seal the slot, and embed the lower edge into slot 11 according to y=1~16 and tidy up the ends to facilitate the embedding of the next coil.

27. Leave two more slots empty (slots 27# and 28#), embed the lower edge of the small coil of the second group of coils of the first phase with the lead-out wire into slot 29, cover the slot with the long slot cover, and embed the upper edge into slot 18 at a pitch of y=2~13 to seal the slot. Then embed the lower edge of the large coil into slot 30 to seal the slot, and embed the upper edge into slot 17 to seal the slot at a pitch of y=1~14, pad the phases, and tidy up the ends. 

28. Leave three more slots empty (1#, 2#, 3# slots), embed the lower edge of the smallest loop with lead wire of the first group of coils of the second phase into slot 4, cover the slot with the long slot cover, embed the upper edge into slot 23 according to y=3~14, and pad the phase insulation; then embed the upper edge of another small loop into slot 5 and seal it, and embed the upper edge into slot 22 according to pitch y=2~15, then embed the lower edge of the large coil into slot 6 and seal it, and embed the upper edge into slot 21 according to y=1~16, tidy up the ends to facilitate the embedding of the next coil. 

29.Leave two more slots empty (slots 7# and 8#), embed the lower edge of the small loop with lead wire of the second group of coils of the third phase into slot 9, cover the slot with the long slot cover, and embed the upper edge into slot 28 at a pitch of y=2~13 to seal the slot, pad the phase insulation, then embed the lower edge of the large loop into slot 10 to seal the slot, and embed the upper edge into slot 27 at a pitch of y=1~14 to seal the slot, tidy up the ends to facilitate the embedding of the next coil.

30.Insert the upper edge of the first phase starting coil into slots 3, 2, and 1 according to the corresponding pitch, pad the phase-to-phase insulation, and tidy up the ends. 

31.Finally, insert the upper edge of the second phase starting coil into slots 8 and 7 according to the corresponding pitch.
slot, pad the phase-to-phase insulation, tidy up the end insulation and the long slot cover phases, and check the slot sealing condition.

32.Y132M-4, Y132S-4, Y160M-4, Y160L-4 (three-phase motor)
Number of stator slots: 36 Number of poles: 4 poles q=3 slots per pole per phase
Pitch: y1=2 (1~9) y2= (1~8) Single-layer cross winding, 6 coils per phase

33.First embed the lower edge of the two large coils (called double coils) with the lead wires in the slot 9 of the first phase.

Cover the long slot cover and seal the slot, and its upper edge is not embedded in slot 1 for the time being. Then, insert the lower edge of another large coil into the inner sealing slot of slot 10, and the upper edge is not embedded (handle).

34.Use an empty slot (Slot 11) and embed the lower edge of the second phase small coil (called single coil) with the lead wire into slot 12. Cover the long slot cover to seal the slot. The upper edge cannot be embedded yet. 

35.Leave two more slots empty (13# and 14# slots), embed the lower edge of one of the two large coils of the third phase with the lead wire into slot 15, cover the slot with the long slot cover, and embed its upper edge into slot 7 according to the pitch y1=1~9 of the large coil to seal the slot, pad the phase insulation, then embed the lower edge of the other coil into slot 16 to seal the slot, embed the upper edge into slot 8 according to the pitch y1=1~9 to seal the slot, and tidy up the ends to facilitate the embedding of the next coil. 

36. Leave another slot empty (slot 17). At this time, pay attention to the connection line between the large coil and the small coil, the upper side and the upper side.
Connect the upper and lower layers, and embed the lower layer of the small coil of the first phase into slot 18, and cover the slot with the long slot cover. Then, embed its upper layer into slot 11 according to the pitch y2=1~8 of the small coil, pad the phase insulation, and tidy up the ends to facilitate the embedding of the next coil. 4.8.5 Embed all coils according to the rule of embedding two slots with two empty slots and embedding one slot with one empty slot. The lower layer of the first coil of the other phase winding should be covered with the long slot cover.

39. Y180M-4, Y180L-4 (three-phase motor)

        Number of stator slots: 48 slots Number of poles: 4 poles q=4 slots per pole per phase 

      Pitch: y=10 (1-11) is a short pitch process, double-layer stacked winding, 16 coils per phase. 4.9.1 Each slot of the double-layer winding has two different upper and lower sides of the coil. When the lower edge is embedded, the interlayer insulation must be covered and compacted with a crimping plate to facilitate the embedding of the upper edge later. When insulating between covering layers, be sure to cover all wires, otherwise, phase-to-phase short circuit accidents may occur. 

42. YL90S2 YL90L2 (single concentric winding) 

      Number of stator slots: Q1=24 slots Number of poles: 2p=2 Pole pitch: τ= Q1/2p=12 Number of phases m=1,  

Two-phase winding: main winding with 10 coils and secondary winding with 8 coils     

 y1=1~12 y2=2~11 y3=3~10 y4=4~9 y5=5~8

43.First embed the lower edge of the smallest coil of the first group of coils of the main winding with the lead wire into slot 8, and insert the interphase insulation. Do not seal the slot for now, and embed the upper edge into slot 5 according to the pitch y=5~8. Pad the interlayer insulation well and leave the slot unsealed for now. Then embed the lower edge of the connected coil into slot 9. Leave the slot unsealed for now. Then insert the upper edge into slot 4 according to the pitch y=4~9 to pad the interlayer insulation. Then insert the lower edge of the connected coil into slot 10 to pad the interlayer insulation, and leave the slot temporarily unsealed. Then insert the upper edge of the connected coil into slot 3 according to y=3~10 and pad the interlayer insulation temporarily without sealing the slot. The lower edge of the coil is embedded into the inner sealing groove of slot 11, and the upper edge is embedded into the inner sealing groove of slot 2 according to the pitch y=2~11 (this coil is a single-layer coil), and then the lower edge of the connected largest coil is embedded into slot 12 Sealing the groove, this coil is also a single-layer coil, and the upper layer edge is embedded in groove 1 according to the pitch y=1~12 to seal the groove.

 Stator winding shaping

2. Repeat the previous process to knock the end with the lead wire at the other end into a trumpet shape, then stand it up, and use a shaping snare to wrap the tied end downward. Use a razor or elbow scissors to straighten one end of the lead wire and straighten the lead wire with a cloth in your hand. Then put in a shaping hammer and use the above method to shape the end of the winding. Then according to the diameter of the winding wire, insert a glass paint tube that is slightly larger than the wire. The length depends on the wiring pattern and the outlet position. Then use a paint scraper to scrape off the paint film on the wire outside the exposed casing. (Scrape paint Be careful not to scrape the wire into thin pieces), and then use wire strippers to peel off the outer insulation layer of the corresponding JBQ Dingqing wire at 20mm. When stripping the wire, you should choose a wire slightly larger than the wire diameter according to the size of the wire diameter. Knife hole, (a knife hole that is too small will cut the wire core into smaller size, and a knife hole that is too large will not peel off the insulation layer). Then twist all the Dingqing wires and the scraped paint wires, and use scissors to cut the excessively long wires until they are level with the Dingqing wires. Then use a butt welder to weld the twisted leads into a spherical bead. Then use a glass paint pipe slightly larger than the nitrile wire and cut it into a length of 50-60mm to cover the welded part. Then separate the first and last ends of the three-phase windings according to the electrical angle of 120° from each other. The lead wires of the first and last ends are as close as possible and tied (the binding method is the same as 5.1.1). The lead wires are pulled from the binding place to the end of the winding at the other end and cut off. It is advisable to finally use a shaping snare to insert the end bell mouth to see if the bell mouth is too large or too high. After shaping, carefully check whether the interphase insulation is missing and whether the three-phase lead wires are connected incorrectly. After confirming that they are qualified, stack them neatly with the designated stack. On the board, the lead wires should all be towards the wider side of the space to facilitate the voltage test. 5.2 YL8012, YL90S2, YL90L2

3. The shaping method of single-phase motor is the same as 5.1. Fix the end without lead wire first. 

4.After straightening the lead wire, insert a φ2mm casing, and use a paint scraper to remove the paint film from the exposed wire.
Scrape off and use wire strippers to peel off the insulation of the three-color 12mm JBF Dingqing wire at 20mm using the same method as 5.1; then connect red to the main winding, blue or green to the auxiliary winding, and yellow to the centrifugal The switch is connected to the capacitor wire, and the first end of one pole phase group of the main winding and the tail end of the other pole phase group are connected in parallel with one end of the secondary winding and one end of the thermal protector . At the same time, connect the red Dingqing wire to the thermal protector. The other end of the protector is connected in series; in the same way, twist the other red Dingqing wire with the first end of one pole phase group of the main winding and the tail end of the other pole phase group, and then use the blue or green Dingqing wire with the secondary winding Twist one of the first ends (insert the φ5mm casing at the same time), cut the overlong wire to be level with the Dingqing wire; then weld the lead wire according to the 5.1 process method, and divide the lead wire into two parts according to the beginning and end of the main and auxiliary windings. At the first and last ends, tie the two ends of the yellow capacitor wire to the same length as the lead wire and leave a centrifugal switch welding wire end in the middle of the corresponding two ends. Finally, shape the ends according to method 5.1 and stack them on the designated pallet. The lead wires should always face the wider side of the space to facilitate the voltage test.

Pressure test of embedded wire stator

Insulation treatment of stator windings Voltage resistance test of embedded wire stator

4.Put the wire-embedded stator to be dipped that has similar specifications and has been tested withstand voltage, into the stator dipped iron ring that has been arranged in the dipped frame. Pay attention to handling it with care when installing the frame, and do not bump the ends. bell mouth to avoid deformation and damage to the wires. After filling one frame, use compressed air to blow away the dust and debris attached to the stator winding and the iron frame. Then it is pulled to the dipping area and hoisted on a flat car by a crane. According to the motor specification, a stator with a center height of less than 90mm can bake four layers in one furnace, and a stator with a center height of more than 100mm can bake three layers in one furnace. 

5.Check whether the drying room equipment and red room door are sealed, and turn on the power to see if the electric heater can generate heat. Only use it after everything is normal. 

6.Push the workpiece hung on the flat car into the drying room for pre-drying. Be careful not to hit the wall when pushing in. The workpiece should be placed in the center of the drying room. Turn on the power and observe whether the ceramic tube of the heater is fully heated to confirm that it is normal. Then close the drying room door and start baking. When baking, pay special attention to observe the movement in the furnace within 1 hour after powering on, whether there are any abnormal sounds or burning smells in the furnace, observe the temperature rise, and control the temperature within the range of 120℃±5℃.

7.Push the drying workpiece into the drying room, check whether the frame hits the wall, and close the drying room door after confirming that it is normal. The temperature is controlled within the range of 135℃±5℃, and the drying time is 8~10h.

Motor Assembly 

Press-fitting of rotor bearings 

Y series three-phase motor
Place the inspected rotor and bearing next to the hydraulic press, insert the bearing into one end of the rotor, align the press sleeve with the same specifications as the inner ring of the bearing with the hydraulic press shaft, turn on the hydraulic press and press it vertically into place; then turn over the other end and press it in the same way. If the stroke of the hydraulic press is high enough, you can use two sleeves to press the upper and lower bearings into place at the same time. After pressing, put it in a frame or workbench padded with clean thick cardboard. Do not damage the surface of the rotor core and the shaft end at will to avoid short circuit of the core and difficulty in installing the pulley. Let the outlet face up and the front cover end face the workbench edge and arrange them neatly. After batch pressing, check that the distance between the stator press-in and the rear end face and the two ends of the casing should be equal, and check whether it is cracked.

YL8012, YL90S2, YL90L2 single-phase motor 

Wiring

Single-phase motor 
Separate the head and tail ends of the pressed stator lead wires, pass them through the lead hole adjacent to the casing, and then insert them into a 2~2.5cm long glass paint tube of similar size to the lead hole. The tube should protrude 4~6mm from the casing. Put the rubber insulating gasket in place, cut off the lead wires that are too long, and put wiring marks on the main and auxiliary windings (the mark specification is φ3mm). The main winding lead wire is red, and the left side facing the workpiece is the head end, which should be marked with ‘U1’, and the right side should be marked with ‘U2’. The secondary winding is green or blue, with the left head end marked with ‘W1’ or ‘Z1’, and the right side should be marked with ‘W2’ or ‘Z2’. The centrifugal switch (i.e. the secondary winding wire) is yellow or white, with the left head end marked with ‘V1’, and the right side should be marked with ‘V2’.
Use wire strippers to select the corresponding knife hole according to the wire diameter of the lead-out wire, and strip the insulation sheath at 8~10mm from the lead-out wire end. Apply the melted rosin to the peeled wire end. When stripping the wire, plug the tin melting furnace into the power socket, turn on the switch, adjust the temperature to the maximum to melt it as quickly as possible. When the tin has melted, reduce the temperature appropriately, and then use needle-nosed pliers to clamp the wire ends one by one and put them into the tin furnace to tin the entire bare wire area.
8.4.1.3 Use a pneumatic screwdriver to loosen the tightening screws of the terminal bolts on the terminal board. Place one for each machine on the casing, align the wire end mark with the mark on the terminal board, insert the wire end into the terminal bolt hole from the bottom of the terminal board, and use a pneumatic screwdriver to lock the side tightening screws until the wire end cannot be pulled out (note that the air pressure should not be too high to avoid breaking the wire end). Adjust the airflow of the pneumatic screwdriver to the minimum. After the wire end is connected, check whether it is connected incorrectly, locked or broken. After ensuring that it is qualified, use two M4*16 lion screws to position and lock the terminal board.

Y series three-phase motor 

Assembly of front and rear covers 

Single-phase motor

Assembly and wiring of capacitors 

Assembly of fan blades and fan covers 

Single-phase motor
Align the fan blades of the same model and specification with the rotor shaft end, and align the inner hole plane of the fan blade with the shaft end plane. Use a champagne hammer to gently knock on the shaft shoulder. After installation, check whether there are cracks or looseness.Install the fan hoods of the same model and specifications horizontally according to the appearance of the air inlet, align the assembly screw holes, screw in the screws and tighten them with a pneumatic screwdriver. After installation, turn the rotor to check whether the fan blades collide with the fan hood.

Three-phase motor
Align the fan blades of the same model and specifications with the keyway at the shaft end and knock them flat with a champagne hammer, then use the corresponding sleeve to knock the fan blades through the retaining ring groove.Use the external snap ring pliers to insert the snap ring pliers that match the snap ring groove into the groove, and then insert the fan cover of the same specification as the casing.
Align the assembly hole with the flat surface facing downward, screw in the screws and tighten them with a pneumatic screwdriver.