SU1334282A1 - Arrangement for sealing the sliding-contact bearing of electric machine - Google Patents

Abstract

The invention relates to electrical engineering. The purpose of the invention is. increased reliability The bearing consists of body 1, cover 2, inserts 3, end cover 4, Tube 5 of non-metallic elastic material is rolled up ;; coiled and mounted between the cover and the shaft -6 so that its cross section is deformed and the tube fits snugly to the shaft and collar. One end of the tube is closed with a stopper made of elastic material. Installing the tube in this way eliminates the occurrence of a gap between the cap and the shaft during the wear process of the insert and the flange, preventing the oil and its vapors from flowing from the bearings into the internal volume of the electric machine by the flow of cooling gas. It also reduces the manufacturing effort. 2 Il. (/) h with ω 4 :; S 00

Description

The invention relates to electrical engineering.

The purpose of the invention is to increase reliability. .five

FIG. I shows the device, the rod section of FIG. 2 shows A-A in FIG.

The bearing consists of the housing 1, the lugs 2, the upper and lower inserts 10 of it 3, the end cover 4, the tube 5, which is installed between the shaft 6 and the end face in the annular groove e of the latter. One end of the tube is closed by a stopper 7 of elastic material. 15 The radial size of the tube section is equal to the distance from the shaft surface to the bottom of the groove.

A tube of non-metallic ynpyfo material, such as nylon, is coiled and installed between the detachable end cap and shaft in the annular groove so that the tube section is deformed (in the drawing, the round section is deformed into an oval section) and the tube fits tightly to the shaft and annular groove in the end cap. One end of the tube is closed with an elastic material cork, such as felt, and the plug may be sunk into the tube. The tightness is ensured by appropriately selecting the dimensions of the annular groove (groove) and the diameter of the tube. The ratio of the tube diameter to 35 depth of the annular groove (undercut) in the face cap is recommended to be at least 1.2, the tube with a length of not less than 1.5 turns on the shaft diameter is installed in the groove of the lower half of the end cover and when installing the upper half of the cap and, their tightening with bolts is compressed (deformed) and fits tightly to the shaft and groove in the collar. As the liner is worn and the 45 end cap is annular gap between 25

the shaft and crescent becomes sickle-shaped and increases in the upper part. In this case, oil leaks out of the bearing even in the presence of a brass knife seal. Installing the tube in the manner described above eliminates the appearance of a gap between the cap and the shaft during the wear of the liner and buckle. Compressed during assembly, for example, a kapron tube, as the gap between the shaft and the upper part increases, expands under the action of elastic forces and eliminates the gap, preventing oil leaks, oil vapors from the bearings into the internal volume of the electric machine with a flow of cooling air. Thus, the use of the proposed design of the sliding bearing of an electric machine increases the reliability of its operation, ensuring a constant adherence of the elastic tube to the shaft and end cap, reduces the labor intensity of manufacturing, eliminates oiling of the windings of the electric machine, increasing the overhaul life of the machine as a whole.

F o

p m u l a i z h gain

A device for sealing the slide bearing of an electric machine with a detachable insert, comprising an end cap with a seal on the shaft, characterized in that, in order to increase reliability, the seal is made in the form of a tube rolled up in a spiral of non-metallic elastic material and installed in the annular groove of the end peg, and the radial size of the tube section is equal to the distance from the shaft surface to the bottom of the groove, while one end of the tube is closed with a stopper made of an elastic material,

Editor T. Lazarenko

Compiled by, Podolsk

Tehred L. Serdyukova Proofreader G. Reshetnik

Order 3974/52 Circulation 659 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, Projecto st., 4

FIG. 2

Claims (1)

Claim A device for sealing a sliding bearing of an electric machine with a detachable liner, comprising an end cap with a shaft seal, which is characterized in that, in order to increase reliability, the seal is made in the form of a tube rolled from a spiral of non-metallic elastic material and the end cap installation and during installation upper half of the cover and. their screed bolts compresses (deforms) and fits snugly against the shaft and the groove in the cover. As the liner and the end cover wear out, the annular gap between the lens in the end groove of the end cover and the radial size of the tube section is equal to the distance from the shaft surface to the bottom of the groove, this 45 one end of the tube is closed with a stopper made of elastic material. Aa FIG. 2