CN201584841U

CN201584841U - Protective device of high-voltage motor bearing

Info

Publication number: CN201584841U
Application number: CN2009202353483U
Authority: CN
Inventors: 王建裕
Original assignee: WUXI HEC ELECTRIC MACHINERY CO Ltd
Current assignee: Wuxi Zhong Dian Motor Co.,Ltd.; SEC Electric Machinery Co Ltd
Priority date: 2009-09-24
Filing date: 2009-09-24
Publication date: 2010-09-15
Anticipated expiration: 2019-09-24

Abstract

The utility model relates to a protective device of a high-voltage motor bearing, which comprises a V-shaped ring, an outer bearing cover, an oil thrower, a bearing pack, and an inner bearing cover, wherein the outer side of the bearing pack is fixed through the oil thrower, the outer bearing cover, and a washer for shaft, the oil thrower is fixed on a motor rotating shaft, and the V-shaped ring is placed at the outer end of an inner ring of the outer bearing cover; and the inner side of the bearing pack is fixed through the inner bearing cover. The protective device is characterized in that maze parts are arranged on the axial matching surface and the radial matching surface of the oil thrower and the outer bearing cover; and a maze ring is mounted between the inner bearing cover and the motor rotating shaft, and a maze part in the corresponding shape is arranged on the side matching surface of the maze ring and the inner bearing cover. The protective device has the advantages of simple, compact, and reasonable structure, and is additionally provided with the maze ring and the maze parts on the bearing inner lid, the bearing outer lid, and the oil thrower, therefore, effectively improves the protection grade of the motor, barely influences the mechanical property of a workpiece, and avoids potential problems of component assembly.

Description

High-pressure motor bearing protective device

Technical field

The utility model relates to a kind of protective device that is used to improve the high-voltage motor safeguard function, specifically a kind of high-pressure motor bearing protective device.

Background technology

Motor is the device that converts electric energy to mechanical energy, and it is widely used in the modern various machinery as drive unit.Motor is of a great variety, and that three phase induction motor wherein has is simple in structure, be easy to advantages such as control, efficient height and power are big and be widely applied.But also there is following defective in three phase induction motor: the one, and bearing damages easily, and this not only can make motor stop and can't move, and the badly damaged machine shaft of meeting, causes rotating shaft to be scrapped; The 2nd, impurity such as dust, water enter lubricating oil by the inside and outside lid of bearing easily, after the lubricating oil that contains impurity enters bearing inside, cause bearing noise easily, when serious even burn out a bearing, cause motor to stop.

Therefore, bearing protection device is housed all generally on the present motor, to improve the motor safeguard function, motor bearings protective device commonly used now is mainly by two kinds: a kind of is to add the V-type circle at the shaft extension end.Because the V-type circle adopts elastomeric material to make, it can be aging after long-time the use, can't reach desired degree of protection; And V-type circle and bearing end cover have certain interval, under the condition that degree of protection is had relatively high expectations, can't meet the demands again.Another kind is that the internal diameter of bearing exterior and interior cover goes out to be provided with the retaining oil groove, because the retaining oil groove generally is to be used for storage part lubricating oil, and the monolateral 0.5mm that is at least of mating surface of bearing exterior and interior cover internal diameter and axle, be difficult to arrive the requirement of water proof and dust proof generally speaking.

Summary of the invention

The purpose of this utility model is to overcome above-mentioned weak point, thereby a kind of simple and reasonable, good seal performance, degree of protection height, support equipment high-pressure motor bearing protective device safe and reliable to operation are provided.

The technical scheme that provides according to the utility model, described high-pressure motor bearing protective device comprises V-type circle, bearing end cover, disc, bearing group, internal bearing cover, the outside of bearing group is fixed by disc, bearing end cover, shaft block ring, disc is fixed on the machine shaft, and the V-type circle is placed in the inner ring outer end of bearing end cover; The inboard of bearing group is fixed by internal bearing cover; It is characterized in that: described disc and bearing end cover are axial, the radial fit face is provided with labyrinth part; A labyrinth ring is housed between internal bearing cover and the machine shaft, also is provided with the corresponding labyrinth part of shape on the side mating surface of labyrinth ring and internal bearing cover.

Described bearing group is made up of bearing holder (housing, cover) and dress at least one bearing within it.

As further improvement of the utility model, offer oil filler point on the described bearing end cover, offer oil storage hole on the bearing holder (housing, cover), oil filler point is connected with oil storage hole, after lubricating oil adds via oil filler point, enter in the cavity between bearing and the internal bearing cover and store along oil storage hole.

As further improvement of the utility model, described bearing group has clamped bearing washer by bearing holder (housing, cover) and dress cylinder roller bearing, ball bearing within it between cylinder roller bearing, the ball bearing.

As further improvement of the utility model, have certain interval between the cylinder roller bearing in the described bearing group, the ball bearing, offer outage corresponding to this gap location on the bearing holder (housing, cover); Lubricating oil in the oil storage hole can enter in two bearings via outage.

As further improvement of the utility model, the interior circle of described bearing end cover is monolateral with the mating surface of machine shaft to be 0.5mm; Between described bearing end cover and the disc radial fit face of labyrinth part monolateral be 1mm, axially mating surface is monolateral is 2mm; Between described internal bearing cover and the labyrinth ring radial fit face of labyrinth part monolateral be 1mm, axially mating surface is monolateral is 2mm.

As further improvement of the utility model, described disc, labyrinth ring adopt No. 45 steels to make.

Compared with the prior art the utility model has the following advantages: the utility model is simple in structure, compact, reasonable, under the situation that does not change structural material, by setting up a labyrinth ring and on bearing exterior and interior cover, disc, setting up labyrinth part, improved the motor degree of protection effectively; For parts processing, advantages of simple is to the almost not influence of workpiece mechanical property; With regard to mechanical deflection, since the radially monolateral 1mm surplus that leaves, the axial monolateral 2mm surplus that leaves, and the parts assembling does not have problems.

Description of drawings

Fig. 1 is the utility model structural representation.

Description of reference numerals: 1-V type circle, 2-bearing end cover, 3-disc, 4-cylinder roller bearing, 5-bearing holder (housing, cover), 6-ball bearing, 7-internal bearing cover, 8-labyrinth ring, 9-machine shaft, 10-shaft block ring, 11-oil filler point, 12-bearing washer, 13-outage, 14-oil storage hole, 15-cavity.

Embodiment

As shown in Figure 1, this embodiment mainly comprises V-type circle 1, bearing end cover 2, disc 3, cylinder roller bearing 4, bearing holder (housing, cover) 5, ball bearing 6, internal bearing cover 7 and labyrinth ring 8, and wherein, cylinder roller bearing 4, bearing holder (housing, cover) 5 and ball bearing 6 constitute bearing group.

Cylinder roller bearing 4, ball bearing 6 are contained in the bearing holder (housing, cover) 5, and are enclosed within on the machine shaft 9, constitute bearing group, between cylinder roller bearing 4 and the ball bearing 6 bearing washer 12 are housed, to improve the resistance to wear of bearing, the useful life of improving bearing group; The outside of bearing group is fixed by disc 3, bearing end cover 2, shaft block ring 10, and disc 3 is fixed on the machine shaft 9, and V-type circle 1 is placed in the inner ring outer end of bearing end cover 2, plays the ground floor protective action; Disc 3 and bearing end cover 2 are axially, the radial fit face is provided with labyrinth part, make impurity such as water, dust be not easy to enter cylinder roller bearing 4 inside, play second layer protective action; The inboard of bearing group is fixing by internal bearing cover 7; a labyrinth ring 8 is housed between internal bearing cover 7 and the machine shaft 9; also be provided with the corresponding labyrinth part of shape on the side mating surface of labyrinth ring 8 and internal bearing cover 7; make impurity such as dust be not easy to enter ball bearing 6 inside, play effect at motor internal protection bearing.

Offer oil filler point 11 on the bearing end cover 2, offer oil storage hole 14 on the bearing holder (housing, cover) 5, oil filler point 11 is connected with oil storage hole 14, after lubricating oil adds via oil filler point 11, enters in the cavity 15 between bearing and the internal bearing cover 7 and storages along oil storage hole 14; Bearing group among the embodiment is made up of cylinder roller bearing 4, ball bearing 6, has clamped bearing washer 12 between the two, has certain interval, for improving lubricant effect, offers outage 13 corresponding to this gap location on the described bearing holder (housing, cover) 5; Lubricating oil in the oil storage hole 14 also can enter in two bearings via outage 13; After adopting this structure, storing in the bearing group has a certain amount of lubricating oil, and the lubricated of long period can be provided, and need not often to add the smoothness running that lubricating oil can guarantee machine.

The interior circle of bearing end cover 2 and the mating surface of machine shaft 9 are monolateral to be 0.5mm; Between bearing end cover 2 and the disc 3 the radial fit face of labyrinth part monolateral be 1mm, axially mating surface is monolateral is 2mm; Between internal bearing cover 7 and the labyrinth ring 8 the radial fit face of labyrinth part monolateral be 1mm, axially mating surface is monolateral is 2mm.For improving the useful life of equipment, described disc 3, No. 45 steels of labyrinth ring 8 preferred employings are made.

Claims

1. high-pressure motor bearing protective device, the outside of bearing group utilize disc (3), bearing end cover (2), shaft block ring (10) fixing, and disc (3) is fixed on the machine shaft (9), and V-type circle (1) is placed in the inner ring outer end of bearing end cover (2); The inboard of bearing group is fixing by internal bearing cover (7); It is characterized in that: described disc (3) is axial with bearing end cover (2), the radial fit face is provided with labyrinth part; Between internal bearing cover (7) and the machine shaft (9) labyrinth ring (8) is housed, also is provided with the corresponding labyrinth part of shape on the side mating surface of labyrinth ring (8) and internal bearing cover (7).

2. high-pressure motor bearing protective device according to claim 1, its feature also is: described bearing group is made up of bearing holder (housing, cover) (5) and dress at least one bearing within it.

3. high-pressure motor bearing protective device according to claim 1; its feature also is: offer oil filler point (11) on the described bearing end cover (2); offer oil storage hole (14) on the bearing holder (housing, cover) (5); oil filler point (11) is connected with oil storage hole (14); after lubricating oil adds via oil filler point (11), enter in the cavity (15) between bearing and the internal bearing cover (7) and storage along oil storage hole (14).

4. high-pressure motor bearing protective device according to claim 1; its feature also is: described bearing group has clamped bearing washer (12) by bearing holder (housing, cover) (5) and dress cylinder roller bearing (4), ball bearing (6) within it between cylinder roller bearing (4), the ball bearing (6).

5. high-pressure motor bearing protective device according to claim 4, its feature also is: cylinder roller bearing (4), ball bearing in the described bearing group have certain interval between (6), and bearing holder (housing, cover) (5) is gone up and offered outage (13) corresponding to this gap location; Lubricating oil in the oil storage hole (14) can enter in two bearings via outage (13).

6. high-pressure motor bearing protective device according to claim 1, its feature also is: the interior circle of described bearing end cover (2) is monolateral with the mating surface of machine shaft (9) to be 0.5mm.

7. high-pressure motor bearing protective device according to claim 1, its feature also is: the radial fit face of labyrinth part is monolateral for 1mm between described bearing end cover (2) and the disc (3), and axially mating surface is monolateral is 2mm.

8. high-pressure motor bearing protective device according to claim 1, its feature also is: the radial fit face of labyrinth part is monolateral for 1mm between described internal bearing cover (7) and the labyrinth ring (8), and axially mating surface is monolateral is 2mm.

9. high-pressure motor bearing protective device according to claim 1, its feature also is: described disc (3), labyrinth ring (8) adopt No. 45 steels to make.