CN103074017B - High-voltage alternating current motor spherical-bearing insulation technology - Google Patents
High-voltage alternating current motor spherical-bearing insulation technology Download PDFInfo
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- CN103074017B CN103074017B CN201210558856.1A CN201210558856A CN103074017B CN 103074017 B CN103074017 B CN 103074017B CN 201210558856 A CN201210558856 A CN 201210558856A CN 103074017 B CN103074017 B CN 103074017B
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Abstract
The invention relates to a high-voltage alternating current motor spherical-bearing insulation technology. The high-voltage alternating current motor spherical-bearing insulation technology can satisfy insulation requirements of a medium-/large-scale motor end cap-type spherical bearing, prevent shaft current production, and eliminate shaft current-caused electric corrosion on a bear and a bearing bush. Through an optimal bearing insulating material and a special-purpose bonding agent, a bear is insulatedly bonded to a spherical surface of a bearing pedestal so that technical problems of bonding and oil resistivity of the bearing insulating material and the spherical surface of the bearing pedestal are solved. An experiment proves that the high-voltage alternating current motor spherical-bearing insulation technology has excellent bonding and insulation effects, effectively prevents shaft current production and can be used for a medium-/large-scale motor spherical bearing insulation.
Description
Technical field
The present invention relates to a kind of high-voltage AC motor spherical bearing insulating process.
Background technique
End cover type spherical bearing is the important rotatable parts of large and medium-sized AC motor, in motor operation course, due to electromagnetic induction effect, on motor shaft, produce induced voltage, and form behind loop between diaxon bearing and ground, between axle and bearing support, produce shaft current, this electric current produces electro erosion to bearing surface and axle surface, can destroy bearing shell tiling and axle body surface finishment, cause bearing bush abrasion, finally cause tile kilning fault.Therefore,, for preventing shaft current, must must add one deck bearing insulation in bearing support and coordinating on sphere of bearing shell, to prevent the generation of shaft current.Technological difficulties are that whole bearing part all operates in lubricant oil, bearing insulation sticks on the support sphere of bearing support, bearing shell spheric seating is on the surface of bearing insulation, therefore require bearing insulation not only to want good insulation preformance, also to get well with the adhesive property of bearings sphere simultaneously, little with the friction factor of bearing shell sphere, the oil resistance of bearing insulation is good.
Summary of the invention
The object of this invention is to provide a kind of high-voltage AC motor spherical bearing insulating process, to meet the insulating requirements of large and middle size motor end cover type spherical bearing, prevent the generation of shaft current, eliminate the galvanic corrosion of shaft current to axle and bearing shell.
Technological scheme of the present invention is a kind of big-and-middle-sized high-voltage AC motor spherical bearing insulating process:
1, a kind of big-and-middle-sized high-voltage AC motor spherical bearing insulating process:
1) sphere insulation (2) is cut into fan-shaped by product drawing size, every limit reserves
20mm machining allowance;
2) trim ring (1), base (3), pressing mold (4) are put into drying oven and be heated to 100 ℃, after insulation 2h, take out;
3) sphere insulation (2) is attached on base (3);
4) in sphere insulation outside, load onto pressing mold (4);
5) trim ring (1) is contained on pressing mold (4);
6) adopt C type fixture (5) that trim ring (1) and base (3) are clamped;
7) keep impaction state, naturally cool to clamper for disassembling (5) after room temperature, trim ring (1), pressing mold (4), the sphere insulation of tentatively having suppressed is taken out, and edge is pruned;
8), by upper bearing bracket (6) sphere and step (10) sphere edge corner angle file filing, with cotton, dip in acetone or gasoline wiping bonding plane, to remove greasy dirt, dust;
9) sphere insulation (8) is installed to respectively on upper bearing bracket (6) sphere and step (10) sphere, join in fact the size of sphere insulation (8);
10) 50 grams of room-temperature curing epoxy glue B component HPC56102-B are slowly poured in 200 grams of room-temperature curing epoxy glue A component HPC56102-A, fully stir, mix;
11) adopt hairbrush that the binder mixing is evenly applied on upper bearing bracket (6) sphere and step (10) sphere;
12) sphere insulation (8) is sticked on upper bearing bracket (6) sphere and step (10) sphere;
13) lower bearing (11) is placed in the bonding sphere insulation of step (10) (8);
14) top bearing shell (7) is installed on lower bearing (11);
15) upper bearing bracket (6) is assembled on top bearing shell (7);
16) with screw (9) by upper bearing bracket (6) and step (10) tightly;
17), at 15～40 ℃, solidify 24h;
18) 500V megger is surveyed insulation resistance between bearing shell and bearing support, and R >=20M Ω is qualified.The technical order of bearing insulation material is shown in Fig. 3, and this material has:
1) good self-lubricating property and wear-resisting property,
2) good manufacturability,
3) stable chemical performance, insulating property are good,
4) friction factor of metal is low to moderate to 0.07, the friction factor of self is low to moderate 0.01, and dynamic and static friction factor is little, and greasy property is good,
5) between surface and bearing support, having can cementability,
Bearing insulation material main performance index meets bearing insulation technical requirements.
Bearing insulation bonding
The double-component binder that the binder that is used for bonding bearing insulation is room curing, this binder ambient temperature curable, easy to use, adhesive effect is good.Main performance index is shown in Fig. 4 table 2, and experimental result shows that this special bonding agent is good to the adhesive effect between the spherical support seat of bearing insulation and bearing support.
The technology of the present invention advantage
The present invention utilizes preferred bearing insulation material and special-purpose binder, bearing insulation is bonded on bearing support sphere, solve bearing insulation material and bearing support and supported the bonding and oil resistance technical barrier between sphere, through experiment, bonding and insulation effect is splendid, effectively prevented the generation of shaft current, can be used as large and medium-sized motor spherical bearing insulation and use.
Accompanying drawing explanation
Fig. 1 is spherical bearing insulation compacting schematic diagram, and in figure, trim ring 1, sphere insulation 2, base 3, pressing mold 4; C type folder 5;
Fig. 2 is that schematic diagram is joined in the tipping of end cover type spherical bearing insulating sticky, and in figure, upper bearing bracket 6, top bearing shell 7, sphere insulation 8, bolt 9, step 10, lower bearing 11.
Fig. 3 is table 1 insulating layer material main performance index table
Fig. 4 is table 2 adhesive glue performance index
Embodiment
As depicted in figs. 1 and 2, a kind of big-and-middle-sized high-voltage AC motor spherical bearing insulating process is as follows:
1) sphere insulation 2 is cut into fan-shaped by product drawing size, every limit reserves 20mm machining allowance;
2) trim ring 1, base 3, pressing mold 4 are put into drying oven and be heated to 100 ℃, after insulation 2h, take out;
3) sphere insulation 2 is attached on base 3;
4) in sphere insulation outside, load onto pressing mold 4;
5) trim ring 1 is contained on pressing mold 4;
6) adopt C type fixture 5 that trim ring 1 and base 3 are clamped;
7) keep impaction state, naturally cool to clamper for disassembling 5 after room temperature, trim ring 1, pressing mold 4, the sphere insulation of tentatively having suppressed is taken out, and edge is pruned;
8), by upper bearing bracket 6 spheres and step 10 sphere edge corner angle file filings, with cotton, dip in acetone or gasoline wiping bonding plane, to remove greasy dirt, dust;
9) sphere insulation 8 is installed to respectively on upper bearing bracket 6 spheres and step 10 spheres, join in fact the size of sphere insulation 8;
10) 50 grams of room-temperature curing epoxy glue B component HPC56102-B are slowly poured in 200 grams of room-temperature curing epoxy glue A component HPC56102-A, fully stir, mix;
11) adopt hairbrush that the binder mixing is evenly applied on upper bearing bracket 6 spheres and step 10 spheres;
12) sphere insulation 8 is sticked on upper bearing bracket 6 spheres and step 10 spheres;
13) lower bearing 11 is placed in the bonding sphere insulation 8 of step 10;
14) top bearing shell 7 is installed on lower bearing 11;
15) upper bearing bracket 6 is assembled on top bearing shell 7;
16) with screw 9, upper bearing bracket 6 and 10 of steps is tight;
17), at 15～40 ℃, solidify 24h;
18) 500V megger is surveyed insulation resistance between bearing shell and bearing support, and R >=20M Ω is qualified.
Claims (1)
1. a big-and-middle-sized high-voltage AC motor spherical bearing insulating process, is characterized in that:
1) sphere insulation (2) is cut into fan-shaped by product drawing size, every limit reserves 20mm machining allowance;
2) trim ring (1), base (3), pressing mold (4) are put into drying oven and be heated to 100 ℃, after insulation 2h, take out;
3) sphere insulation (2) is attached on base (3);
4) in sphere insulation outside, load onto pressing mold (4);
5) trim ring (1) is contained on pressing mold (4);
6) adopt C type fixture (5) that trim ring (1) and base (3) are clamped;
7) keep impaction state, naturally cool to clamper for disassembling (5) after room temperature, trim ring (1), pressing mold (4), the sphere insulation of tentatively having suppressed is taken out, and edge is pruned;
8), by upper bearing bracket (6) sphere and step (10) sphere edge corner angle file filing, with cotton, dip in acetone or gasoline wiping bonding plane, to remove greasy dirt, dust;
9) sphere insulation (8) is installed to respectively on upper bearing bracket (6) sphere and step (10) sphere, join in fact the size of sphere insulation (8);
10) 50 grams of room-temperature curing epoxy glue B component HPC56102-B are slowly poured in 200 grams of room-temperature curing epoxy glue A component HPC56102-A, fully stir, mix;
11) adopt hairbrush that the binder mixing is evenly applied on upper bearing bracket (6) sphere and step (10) sphere;
12) sphere insulation (8) is sticked on upper bearing bracket (6) sphere and step (10) sphere;
13) lower bearing (11) is placed in the bonding sphere insulation of step (10) (8);
14) top bearing shell (7) is installed on lower bearing (11);
15) upper bearing bracket (6) is assembled on top bearing shell (7);
16) with screw (9) by upper bearing bracket (6) and step (10) tightly;
17), at 15～40 ℃, solidify 24h;
18) 500V megger is surveyed insulation resistance between bearing shell and bearing support, and R >=20M Ω is qualified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210558856.1A CN103074017B (en) | 2012-12-21 | 2012-12-21 | High-voltage alternating current motor spherical-bearing insulation technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210558856.1A CN103074017B (en) | 2012-12-21 | 2012-12-21 | High-voltage alternating current motor spherical-bearing insulation technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103074017A CN103074017A (en) | 2013-05-01 |
| CN103074017B true CN103074017B (en) | 2014-01-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210558856.1A Active CN103074017B (en) | 2012-12-21 | 2012-12-21 | High-voltage alternating current motor spherical-bearing insulation technology |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1045232C (en) * | 1995-03-21 | 1999-09-22 | 王核 | Technology and special equipment for making lightning arrester core body |
| JP2000290618A (en) * | 1999-04-07 | 2000-10-17 | Asmo Co Ltd | Adhesive composition and motor |
| US6860638B2 (en) * | 2002-03-04 | 2005-03-01 | Polygon Company, Inc. | Spherical bearing |
| CN1900543A (en) * | 2006-07-03 | 2007-01-24 | 藤长宽 | Use of spray process in motor regulating center bearing base inner surface |
| DE102008042211A1 (en) * | 2008-09-19 | 2010-04-08 | Zf Friedrichshafen Ag | ball joint |
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