CN2101340U

CN2101340U - Deep channel type squirrel-cage rotor bar-broken preventing structure

Info

Publication number: CN2101340U
Application number: CN 91219863
Authority: CN
Inventors: 王胜五
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-08-08
Filing date: 1991-08-08
Publication date: 1992-04-08

Abstract

The guide strip of the squirrel-cage rotor of a large-scale and medium-scale asynchronous motor brakes frequently, aiming to solve the problem, the utility model is provided. Aiming at the deep channel type rotor, the utility model reserves the trough shape of the original rotor core, and the red copper guide strip of the rectangular section is decomposed into an upper part and a lower part which have a tippy key effect, the guide strips support tightly in a rotor groove by means of the inclination of the red copper guide strip to avoid that the guide strips vibrate when the motor is started in order to prevent the guide strip of the rotor from breaking.

Description

Deep channel type squirrel-cage rotor bar-broken preventing structure

The utility model belongs to large and medium asynchronous motor, specifically is meant the architecture advances of shallow/deep groove type cage rotor sliver, uses for large and middle size motor manufactory structural design, or is used for old motor reconstruct.

Known operating shallow/deep groove type cage rotor sliver structure, it is the red copper sliver that will have the square-section, directly squeeze in the rectangular channel of rotor core, because be that rectangular conductors is squeezed into rectangular channel, can't make sliver stretching in groove, thus motor the starting and running in, sliver vibrates in groove, often cause the fracture accident of sliver, have a strong impact on production.

(referring to: " big motor technology " No3, nineteen eighty-two, the 15th page).

(referring to: " motor engineering handbook " Volume Four, the 20th piece, the 25th page).

The purpose of this utility model is, the red copper sliver that will have square-section stretching effectively makes it at motor starting and in service in rectangle rotor core groove, unlikelyly causes vibration, so as to preventing the fracture accident of rotor bar.

The purpose of this utility model is achieved like this:

Considering the vibration of sliver in the rotor core groove, is along the short transverse vibration of groove, so the stretching of sliver in groove only controlled the stretching of short transverse.For this reason, known sliver is decomposed into the two parts with taper key effect by short transverse, promptly go up sliver and following sliver, and the sliver mating surface that all has constant slope up and down, when assembling in the rotor core groove up and down during sliver, will go up sliver earlier and squeeze in the groove, and then will descend sliver to squeeze in the groove by mating surface, after adjusting sliver and unshakable in one's determination symmetry, the major part of the sliver that pounds down again, until make sliver up and down oneself in core slots till the stretching.

Owing to adopt this stretching scheme, the stretching of sliver in the rotor core groove guaranteed, prove through the enforcement of many prototypes, the fracture accident of rotor bar does not take place really once more.

Below in conjunction with accompanying drawing and enforcement instantiation, the utility model is elaborated again.

Accompanying drawing (one) is for rotor core is short, the more shallow type of flute profile.

Accompanying drawing (two) is for rotor core is long, the more shallow type of flute profile.

Accompanying drawing (three) is the special dark type of the flute profile of rotor core.

Among the figure: sliver in 1 rotor core, 2,3 times slivers, 4 end ring (accompanying drawing three is a top ring), 5 lower loops.

The utility model is according to the prototype concrete condition, and its structural shape can be divided into three kinds of situations to be implemented:

1, short, the more shallow person of flute profile of rotor core is referring to accompanying drawing one, known sliver is decomposed into sliver 2 and following sliver 3, and above sliver 2 is a main body, following sliver 3 only plays the taper key effect, in last sliver 2 is packed rotor core 1 groove into after, will descend sliver 3 to cooperate with mating surface and last sliver 2, stamp down the major part of sliver then respectively, make its at the short transverse stretching in rotor core 1 groove, again the sliver two ends of stretching are embedded in the groove of end ring 4, weld.

2, long, the more shallow person of flute profile of rotor core is referring to accompanying drawing two, known sliver is decomposed into sliver 2 and following sliver 3, will go up sliver 2 as main body, following sliver 3 also still plays the taper key effect, and left-right symmetric distributes, after last sliver 2 is packed in the groove of rotor core 1, to descend sliver to cooperate with mating surface and last sliver 2 about 3 minutes, lay the side, two ends of sliver 3 about dividing then, still make its at the short transverse stretching in the groove of rotor core 1, sliver two ends with stretching embed in the groove of end ring 4 again, weld.

3, the special dark person of the flute profile of rotor core is referring to accompanying drawing three, known sliver is decomposed into equal up and down or approximately equalised two slivers, and these two slivers are made a pair of taper key, the material that wherein goes up sliver 2 be red copper or brass (adopting brass during high starting torque) down the material of sliver be red copper.

To descend sliver 3 to pack in rotor core 1 groove earlier, at this moment fix, squeeze into inwards for major part for first, squeeze into inwards for the microcephaly for second, and squeeze into inwards for major part again, arrange down for the 3rd with this with the rotor either side.And go up squeezing into of sliver, then should according to the principle of following sliver pairing, squeeze into correspondingly, go on alternately like this, until whole pairings than till urgent together.The two ends of the last sliver 2 after wherein urgent embed in the groove of top ring 4, and the two ends of following sliver 3 embed in the groove of lower loop 5, weld, and constitute two cage-shaped structure of shallow/deep groove type.

The employed sliver up and down of the utility model can be used the mold plane or mill processing, this sliver up and down with taper key effect, the short transverse stretching of sliver in rotor fixed, avoid sliver in motor starting procedure, to vibrate, in order to improve the starting torque of motor, reduce starting current, outside the last sliver of the third structure situation can being made with brass, all the other are in order to improve the motor operational efficiency, reduce rotor temperature rise, the sliver of making no distinction of rank is made with red copper without exception.

The known extended bar rotor of this contrast, not only reliable in structure, durable in use, prevent disconnected bar, but also can obtain more outstanding electric property, as high starting torque, high efficiency etc.

Claims

1, a kind of shallow/deep groove type cage rotor bar-broken preventing system, last sliver 2 after having iron core 1 and being decomposed, following sliver 3, it is characterized in that described up and down sliver all squeezes in the rotor core groove with the taper key effect, embed in the groove of end ring 4 for the sliver two ends of first and second kinds of structural shapes and weld, embed in the groove of top ring 4 for the last sliver of the third structural shape, down in the groove of sliver embedding lower loop 5 and weld.

2, shallow/deep groove type cage rotor bar-broken preventing system as claimed in claim 1, it is characterized in that going up sliver 2 except that the third structural shape is said can be with the brass material, and sliver is used the red copper material without exception about all the other.

3, shallow/deep groove type cage rotor bar-broken preventing system as claimed in claim 1, it is characterized in that first kind of structural shape, following sliver 3 is one, second kind of structural shape, following sliver 3 is two, and left-right symmetric distributes, the third structural shape, be will go up sliver to be solded into top ring, following sliver is solded into lower loop, constitutes two cage-shaped structure of shallow/deep groove type.