CN2788440Y

CN2788440Y - Explosion-separating three phases asynchronous motor rotation shaft bearing structure for coal-cutter

Info

Publication number: CN2788440Y
Application number: CN 200420150353
Authority: CN
Inventors: 杨志伟; 王文喜; 承炳飞; 刘湘凡
Original assignee: 杨志伟
Priority date: 2004-08-04
Filing date: 2004-08-04
Publication date: 2006-06-14
Anticipated expiration: 2014-08-04

Abstract

The utility model relates to a structure of a bearing of a rotary shaft of an explosion separating three-phase asynchronous motor used in coal mining machines. The utility model has better impact and load resistance. When a rotary shaft twists, a bearing can not be meshed tightly, the axial size of an end cover of the extending end of the shaft can be shorter, the work hour of processing is shorter and the utility model has low cost. The utility model comprises a rotary shaft, wherein one end of the rotary shaft is sheathed with a cylinder roller bearing. The end surface of one end of an inner ring of the roller bearing contacts the thrush stopping surface of a shaft journal of the rotary shaft. Both sides of the bearing and the bearing are respectively sheathed with an inner bearing cover and an outer bearing cover. The inner bearing cover and the outer bearing cover respectively contact the end surface of an outer ring of the bearing. An end cover is sheathed on the exterior of the bearing. The end cover, the inner bearing cover and the outer bearing cover are connected by screws. The utility model is characterized in that the other end of the rotary shaft is sheathed with a centering roller bearing; the end surface of one end of an inner ring of the centering roller bearing contacts the thrush stopping surface of the shaft journal of the rotary shaft; both sides of the centering roller bearing and the rotary shaft are respectively sheathed with an inner bearing cover and an outer bearing cover; the end surfaces of the inner bearing cover and the outer bearing cover respectively contact the end surface of an outer ring of the centering roller bearing; an end cover is sheathed on the exterior of the centering roller bearing; the end cover, the inner bearing cover and the outer bearing cover are connected by screws.

Description

The coal-winning machine bearing arrangement of the rotating shaft of flame-proof type threephase asynchronous

(1) technical field

The utility model relates to the accessory of flame-proof type threephase asynchronous, is specially the bearing arrangement of coal-winning machine with the rotating shaft of flame-proof type threephase asynchronous.

(2) background technology

Existing coal-winning machine is seen Fig. 1 with the bearing arrangement of the rotating shaft of flame-proof type threephase asynchronous, it comprises rotating shaft 9, fan end at motor, rotating shaft 9 is set with cylinder roller bearing 12, the thrust surface of the shaft shoulder of the one end end face contact rotating shaft 9 of the inner ring of roller bearing 12, the both sides of bearing 12, be respectively installed with internal bearing cover 10 and bearing end cover 14 in the rotating shaft 9, the end face of internal bearing cover 10, bearing end cover 14 is contact bearing 12 outer rings respectively, the outer cover of bearing 12 is equipped with end cap 13, connects with screw 11 between end cap 13, internal bearing cover 10, the bearing end cover 14; The other end of rotating shaft 9 is the shaft extension end, be set with bearing end cover 3, deep groove ball bearing 1, cylinder roller bearing 7 and internal bearing cover 8 from outside to inside successively, the outer cover of deep groove ball bearing 1 and cylinder roller bearing 7 is equipped with end cap 5, be provided with sealing ring 6 between deep groove ball bearing 1 and the rotating shaft 9, the shaft shoulder thrust surface of the inner ring contact rotating shaft 9 of cylinder roller bearing 7, its outer ring contact bearing inner cap 8, the cycle surface contact bearing enclosing cover 3 of deep groove ball bearing 1, connect with screw 4 between internal bearing cover 8, enclosing cover 3 and the

end cap

5,2,15 are respectively sealing ring.It is better that the weak point of this structure is that cylinder roller bearing 7 bears the ability of heavy load radially, but the ability to bear of impact load is relatively poor, and deep groove ball bearing 1 only plays the axial location effect, when deflection takes place in rotating shaft 9, cylinder roller bearing 7 and deep groove ball bearing 1 are easily killed, cause the motor stall and burn, end cap 5 bearing chamber axial lengths are longer, the axial space that takies motor internal is bigger, and two grades of diameter fit dimensions are arranged, also will process the groove of placing sealing ring, the man-hour of processing is longer.

(3) summary of the invention

At the bearing arrangement of existing coal-winning machine with the rotating shaft of flame-proof type threephase asynchronous, when rotating shaft generation deflection, bearing is easily killed and is caused the motor stall and burn, and its bearing chamber axial length of the end cap of shaft extension end is longer, the axial space that takies motor internal is bigger, and the groove that two grades of diameter fit dimensions and placement sealing ring are arranged, the shortcoming that the man-hour of processing is long, the utility model provides the bearing arrangement of another coal-winning machine with the rotating shaft of flame-proof type threephase asynchronous, the ability of its anti-shock loading is good, when rotating shaft generation deflection, bearing can not killed, and the axial dimension of shaft extension end end cap can accomplish shortlyer, and the man-hour of processing is shorter.

Its technical scheme is such: it comprises rotating shaft, one end of described rotating shaft is set with cylinder roller bearing, the thrust surface of the axle journal of the one end end face contact rotating shaft of the inner ring of described roller bearing, the both sides of described bearing, be respectively installed with internal bearing cover and bearing end cover in the described rotating shaft, described internal bearing cover, bearing end cover be the end face of contact bearing outer ring respectively, and the outer cover of described bearing is equipped with end cap, connects with screw between described end cap, internal bearing cover, the bearing end cover; It is characterized in that: the other end of described rotating shaft is set with self-aligning roller bearing, the thrust surface of the axle journal of the one end end face contact rotating shaft of the inner ring of described self-aligning roller bearing, the both sides of described self-aligning roller bearing, be respectively installed with internal bearing cover and bearing end cover in the described rotating shaft, the end face of described internal bearing cover, bearing end cover contacts the end face of self-aligning roller bearing outer ring respectively, the outer cover of described self-aligning roller bearing is equipped with end cap, connects with screw between described end cap, internal bearing cover, the bearing end cover.

In the said structure of the present utility model, one end of rotating shaft remains cylinder roller bearing, and the other end substitutes original cylinder roller bearing and deep groove ball bearing with a self-aligning roller bearing, self-aligning roller bearing has the effect of aligning, can bear certain axial load, and ability with stronger anti-shock loading, when rotating shaft generation deflection, the aligning effect of aligning cylinder roller bearing self guarantees that it can not kill, thereby guarantee that motor has long useful life, owing to use an aligning cylinder roller bearing instead, the axial dimension of this end end cap shortens, can increase the usage space of motor internal like this, and the size of end cap shortens corresponding manufacturing procedure minimizing, processing cost reduction.

(4) description of drawings

Fig. 1 is the cutaway view of existing coal-winning machine with the bearing arrangement of the rotating shaft of flame-proof type threephase asynchronous;

Fig. 2 is a cutaway view of the present utility model.

(5) embodiment

See Fig. 2, the utility model comprises rotating shaft 1, one end of rotating shaft 1 is set with cylinder roller bearing 9, the thrust surface of the shaft shoulder of the one end end face contact rotating shaft of the inner ring of roller bearing 9, the both sides of bearing 9 are respectively installed with internal bearing cover 8 and bearing end cover 12 in the rotating shaft 1, internal bearing cover 8, bearing end cover 12 be the end face of contact bearing outer ring respectively, the outer cover of bearing 9 is equipped with end cap 10, connects with screw 11 between end cap 10, internal bearing cover 8, the bearing end cover 12; The other end of rotating shaft 1 is set with self-aligning roller bearing 6, the thrust surface of the shaft shoulder of the one end end face contact rotating shaft 1 of the inner ring of self-aligning roller bearing 6, the both sides of self-aligning roller bearing 6, be respectively installed with internal bearing cover 7 and bearing end cover 3 in the rotating shaft 1, the end face of internal bearing cover 7, bearing end cover 3 contacts the end face of self-aligning roller bearing 6 outer rings respectively, the outer cover of self-aligning roller bearing 6 is equipped with end cap 5, connects with screw 4 between end cap 5, internal bearing cover 7, the

bearing end cover

3, and 2,13 are respectively sealing ring.When the utility model was installed on threephase asynchronous, as the shaft extension end, the other end was the fan end of motor with a end that self-aligning roller bearing is housed.

Claims

1, the coal-winning machine bearing arrangement of the rotating shaft of flame-proof type threephase asynchronous, it comprises rotating shaft, one end of described rotating shaft is set with cylinder roller bearing, the thrust surface of the axle journal of the one end end face contact rotating shaft of the inner ring of described roller bearing, the both sides of described bearing, be respectively installed with internal bearing cover and bearing end cover in the described rotating shaft, described internal bearing cover, bearing end cover be the end face of contact bearing outer ring respectively, the outer cover of described bearing is equipped with end cap, connects with screw between described end cap, internal bearing cover, the bearing end cover; It is characterized in that: the other end of described rotating shaft is set with self-aligning roller bearing, the thrust surface of the axle journal of the one end end face contact rotating shaft of the inner ring of described self-aligning roller bearing, the both sides of described self-aligning roller bearing, be respectively installed with internal bearing cover and bearing end cover in the described rotating shaft, the end face of described internal bearing cover, bearing end cover contacts the end face of self-aligning roller bearing outer ring respectively, the outer cover of described self-aligning roller bearing is equipped with end cap, connects with screw between described end cap, internal bearing cover, the bearing end cover.