CN102868248A

CN102868248A - Anti-seepage structure of pump motor bearing

Info

Publication number: CN102868248A
Application number: CN2012103109628A
Authority: CN
Inventors: 沈琳
Original assignee: BEIJING SHUGUANG AERO ELECTRICAL Co Ltd
Current assignee: BEIJING SHUGUANG AERO ELECTRICAL Co Ltd
Priority date: 2012-08-28
Filing date: 2012-08-28
Publication date: 2013-01-09
Anticipated expiration: 2032-08-28
Also published as: CN102868248B

Abstract

The invention belongs to a motor structure design technology and relates to the improvement of a pump motor bearing structure. An anti-seepage structure of a pump motor bearing comprises a motor end cover (1), a rotary shaft (2), a sealing bearing (3), a bearing inner ring locking nut (4), a bearing outer ring stop ring (5), a pump shell (6) and a movable sealing mechanism (7). The anti-seepage structure of the pump motor bearing is characterized in that an annular groove (8) is formed in an inner cavity of the motor end cover; at least three liquid drainage holes (10) are formed in the inner wall of the inner cavity of the motor end cover; and a liquid drainage nut (9) of which the section is trapezoidal is screwed on a thread section of the rotary shaft (2). The anti-seepage structure of the pump motor bearing has water anti-seepage capacity, after a movable sealing material of a pump motor is abraded, liquid which is leaked from the inner cavity of the pump shell to the inner cavity of the motor end cover can be prevented from being leaked into a motor bearing and a motor, and the working performance and service life of the motor are ensured.

Description

The leakage preventing structure of pump motor bearing

Technical field

The invention belongs to the electric machine structure designing technique, relate to the improvement to the pump motor bearing arrangement.

Background technology

The bearing arrangement of present a kind of pump motor is referring to Fig. 1, and it is comprised of electric motor end cap 1, rotating shaft 2, sealed bearing 3, bearing inner ring locking nut 4, bearing outer ring baffle ring 5, pump case 6 and movable sealing mechanism 7.The outer ring of sealed bearing 3 is installed in the bearing outer ring mount pad of electric motor end cap 1, by bearing outer ring baffle ring 5 bearing outer ring is compressed, bearing outer ring baffle ring 5 is fixed by screws on the right side of bearing outer ring mount pad, the inner ring of sealed bearing 3 is installed on the bearing inner race mount pad of rotating shaft 2, bearing inner ring locking nut 4 is screwed on the thread segment on rotating shaft 2 upper bearing (metal) inner ring mount pads the right, bearing inner race is compressed, fit and be bolted and be integral body in the left side of the right side of electric motor end cap 1 and pump case 6, between the left side of the right side of electric motor end cap 1 and pump case 6, movable sealing mechanism 7 is installed, the inner chamber of electric motor end cap 1 and pump case 6 is divided into the electric motor end cap inner chamber on the left side and the pump case inner chamber two parts on the right, and the centre bore of rotating shaft 2 driven sealing mechanisms 7 passes.Its shortcoming is: after aging distortion, sealing effectiveness decline occur the seal of movable sealing mechanism 7 and sealed bearing 3, water in the pump case inner chamber or oil or other liquid will be to electric motor end cap inner chamber seepages, these liquid might enter in the motor bearings even enter motor internal, affect service behaviour and the useful life of motor.

Summary of the invention

The objective of the invention is: a kind of pump motor bearing leakage preventing structure with water-impervious ability is provided, so that after the dynamic sealing material wearing and tearing of pump motor, prevents that liquid from infiltrating motor bearings and motor internal, guarantees service behaviour and the useful life of motor.

Technical scheme of the present invention is: the leakage preventing structure of pump motor bearing, and it comprises electric motor end cap 1, rotating shaft 2, sealed bearing 3, bearing inner ring locking nut 4, bearing outer ring baffle ring 5, pump case 6 and movable sealing mechanism 7; The outer ring of sealed bearing 3 is installed in the bearing outer ring mount pad of electric motor end cap 1, by bearing outer ring baffle ring 5 bearing outer ring is compressed, bearing outer ring baffle ring 5 is fixed by screws on the right side of bearing outer ring mount pad, the inner ring of sealed bearing 3 is installed on the bearing inner race mount pad of rotating shaft 2, bearing inner ring locking nut 4 is screwed on the thread segment on rotating shaft 2 upper bearing (metal) inner ring mount pads the right, bearing inner race is compressed, fit and be bolted and be integral body in the left side of the right side of electric motor end cap 1 and pump case 6, between the left side of the right side of electric motor end cap 1 and pump case 6, movable sealing mechanism 7 is installed, the inner chamber of electric motor end cap 1 and pump case 6 is divided into the electric motor end cap inner chamber on the left side and the pump case inner chamber two parts on the right, and the centre bore of rotating shaft 2 driven sealing mechanisms 7 passes; It is characterized in that: on the inwall of electric motor end cap inner chamber, there is an annular groove 8 on the right of bearing outer ring mount pad, the inwall of electric motor end cap inner chamber have be uniformly distributed along the circumference, with at least 3 outages 10 that electric motor end cap 1 outer surface connects, the inner port of all outages 10 all is communicated with annular groove 8; On the thread segment of rotating shaft 2, to twist a cross section be trapezoidal discharge opeing nut 9 for the right of bearing inner ring locking nut 4, the outward flange of discharge opeing nut 9 is corresponding with the position of annular groove 8.

Advantage of the present invention is: have the water-impervious ability, after the dynamic sealing material wearing and tearing of pump motor, can prevent that the liquid that leaks into the electric motor end cap inner chamber from the pump case inner chamber from infiltrating motor bearings and motor internal, guaranteed service behaviour and the useful life of motor.

Description of drawings

Fig. 1 is the bearing arrangement schematic diagram of present a kind of pump motor.

Fig. 2 is structural representation of the present invention.

Embodiment

Below in conjunction with the present invention is described in further details.Referring to Fig. 2, the leakage preventing structure of pump motor bearing, it comprises electric motor end cap 1, rotating shaft 2, sealed bearing 3, bearing inner ring locking nut 4, bearing outer ring baffle ring 5, pump case 6 and movable sealing mechanism 7; The outer ring of sealed bearing 3 is installed in the bearing outer ring mount pad of electric motor end cap 1, by bearing outer ring baffle ring 5 bearing outer ring is compressed, bearing outer ring baffle ring 5 is fixed by screws on the right side of bearing outer ring mount pad, the inner ring of sealed bearing 3 is installed on the bearing inner race mount pad of rotating shaft 2, bearing inner ring locking nut 4 is screwed on the thread segment on rotating shaft 2 upper bearing (metal) inner ring mount pads the right, bearing inner race is compressed, fit and be bolted and be integral body in the left side of the right side of electric motor end cap 1 and pump case 6, between the left side of the right side of electric motor end cap 1 and pump case 6, movable sealing mechanism 7 is installed, the inner chamber of electric motor end cap 1 and pump case 6 is divided into the electric motor end cap inner chamber on the left side and the pump case inner chamber two parts on the right, and the centre bore of rotating shaft 2 driven sealing mechanisms 7 passes; It is characterized in that: on the inwall of electric motor end cap inner chamber, there is an annular groove 8 on the right of bearing outer ring mount pad, the inwall of electric motor end cap inner chamber have be uniformly distributed along the circumference, with at least 3 outages 10 that electric motor end cap 1 outer surface connects, the inner port of all outages 10 all is communicated with annular groove 8; On the thread segment of rotating shaft 2, to twist a cross section be trapezoidal discharge opeing nut 9 for the right of bearing inner ring locking nut 4, the outward flange of discharge opeing nut 9 is corresponding with the position of annular groove 8.

For the ease of installation and removal discharge opeing nut 9, at the outward flange of discharge opeing nut 9 at least 2 breach 9a that are uniformly distributed along the circumference are arranged.

Operation principle of the present invention is: after aging distortion, sealing effectiveness decline occur the seal of movable sealing mechanism 7 and sealed bearing 3, water in the pump case inner chamber or oil or other liquid will be to electric motor end cap inner chamber seepages, these liquid enter the electric motor end cap inner chamber along rotating shaft 2, under the effect of the centrifugal force that 9 rotations of discharge opeing nut produce, sepage enters annular groove 8, discharges by outage 10.So just prevented that sepage from entering motor bearings and motor cavity.

One embodiment of the present of invention have 3 outages 10 that are uniformly distributed along the circumference, connect with electric motor end cap 1 outer surface at the inwall of electric motor end cap inner chamber, at the outward flange of discharge opeing nut 92 breach 9a that are uniformly distributed along the circumference are arranged.

Claims

1. the leakage preventing structure of pump motor bearing, it comprises electric motor end cap (1), rotating shaft (2), sealed bearing (3), bearing inner ring locking nut (4), bearing outer ring baffle ring (5), pump case (6) and movable sealing mechanism (7); The outer ring of sealed bearing (3) is installed in the bearing outer ring mount pad of electric motor end cap (1), by bearing outer ring baffle ring (5) bearing outer ring is compressed, bearing outer ring baffle ring (5) is fixed by screws on the right side of bearing outer ring mount pad, the inner ring of sealed bearing (3) is installed on the bearing inner race mount pad of rotating shaft (2), bearing inner ring locking nut (4) is screwed on the thread segment on rotating shaft (2) upper bearing (metal) inner ring mount pad the right, bearing inner race is compressed, fit and be bolted and be integral body in the left side of the right side of electric motor end cap (1) and pump case (6), between the left side of the right side of electric motor end cap (1) and pump case (6), movable sealing mechanism (7) is installed, the inner chamber of electric motor end cap (1) and pump case (6) is divided into the electric motor end cap inner chamber on the left side and the pump case inner chamber two parts on the right, and the centre bore of the driven sealing mechanism of rotating shaft (2) (7) passes; It is characterized in that: on the inwall of electric motor end cap inner chamber, there is an annular groove (8) on the right of bearing outer ring mount pad, the inwall of electric motor end cap inner chamber have be uniformly distributed along the circumference, with at least 3 outages (10) that electric motor end cap (1) outer surface connects, the inner port of all outages (10) all is communicated with annular groove (8); On the thread segment of rotating shaft (2), to twist a cross section be trapezoidal discharge opeing nut (9) for the right of bearing inner ring locking nut (4), the outward flange of discharge opeing nut (9) is corresponding with the position of annular groove (8).

2. the leakage preventing structure of pump motor bearing according to claim 1, it is characterized in that: the outward flange at discharge opeing nut (9) has at least 2 breach (9a) that are uniformly distributed along the circumference.