CN203051506U

CN203051506U - Three-point-contact sealing bearing

Info

Publication number: CN203051506U
Application number: CN 201320017611
Authority: CN
Inventors: 潘勇
Original assignee: CHENGDU JILU TECHNOLOGY CO LTD
Current assignee: CHENGDU JILU TECHNOLOGY CO LTD
Priority date: 2013-01-14
Filing date: 2013-01-14
Publication date: 2013-07-10
Anticipated expiration: 2023-01-14

Abstract

The utility model discloses a three-point-contact sealing bearing which comprises an outer bearing ring, an inner bearing ring, a retainer, a rolling body and a sealing ring, wherein an outer ring of the sealing ring is fixed on the inner wall of the outer bearing ring in an embedding way, the sealing ring consists of a sealing element and a skeleton, the inner circumference of the sealing element is provided with three parallel contact lips which are in close contact with the outer wall of the inner bearing ring, the outer side surface of the skeleton is provided with a barrier edge for positioning the sealing element, the contact surfaces between the inner wall of the outer bearing ring and the rolling body and between the outer wall of the inner bearing ring and the rolling body are respectively provided with a groove, a solid lubricant is embedded in each groove, the single-side magnitude of interference between the three contact lips and the outer wall of the inner bearing ring ranges from 1.2mm to 1.8mm, and the closing diameter of the barrier edge of the outer side surface of the skeleton is 8mm to 10mm greater than the outer diameter of the inner bearing ring. The three-point-contact sealing bearing has a good lubricating effect, the elasticity of the sealing element and the sealing performance of the bearing are improved, the abrasion of the bearing is alleviated, and the service life of the bearing is prolonged.

Description

3 contact seal bearings

Technical field

The utility model relates to a kind of bearing, relates in particular to a kind of 3 contact seal bearings.

Background technique

Pump machines, the working environment of equipment such as oilfield machinery is very abominable, its workpiece is everlasting and is turned round in the place that is mixed with muddy water, sealability and operating life to the bearing that uses requires very high thus, the seal ring that carries on original this bearing, have Sealing and skeleton, the interior Zhou Yousan of Sealing the identical contact lip of thickness that is arranged in parallel, contact with the bearing inner race outer wall, the monolateral magnitude of interference of contact lip and bearing inner race outer wall is about 0.5mm, the skeleton outer side surface has the rib of positioning seals, its closing in diameter than the big 1mm of bearing inner race external diameter about, this structure makes the contact lip of Sealing and the magnitude of interference between the bearing inner race outer wall too small, skeleton is too much to the containing of Sealing, the elasticity deficiency of Sealing, cause the sealability of seal ring to reduce, influenced the lubrication effect of bearing, for being mixed with the bearing of working under the environment of muddy water for a long time, this sealing configuration form is just more inadequate, slime water is easy to infiltrate bearing inside, trickle mud pellet and lubricant grease are lumped together, aggravate the wearing and tearing of bearing, finally caused the bearing shortening greatly in working life.

Summary of the invention

At the problem that above-mentioned prior art exists, the utility model purpose is to provide a kind of 3 contact seal bearings, under bad working environment, also has excellent sealing performance, thereby reduces the wearing and tearing of bearing, the operating life that prolongs bearing.

The technical solution of the utility model is: a kind of 3 contact seal bearings, comprise bearing outer ring, bearing inner race, retainer, rolling element and seal ring, the embedded inwall that is fixed on bearing outer ring in the outer ring of seal ring, described seal ring is made of Sealing and skeleton, the interior Zhou Yousan of Sealing contact lip that is arranged in parallel, three contact lips closely contact with the bearing inner race outer wall, described skeleton outer side surface is provided with the rib of positioning seals, the contact surface of the inwall of described bearing outer ring and the outer wall of bearing inner race and rolling element all has groove, groove is embedded with solid lubricant, three monolateral magnitude of interference that contact lip and bearing inner race outer wall are 1.2mm to 1.8mm, and the closing in diameter of the rib of skeleton outer side surface is than the big 8mm to 10mm of external diameter of bearing inner race.

As preferably, the monolateral magnitude of interference of the outer wall of described contact lip and bearing inner race is 1.5mm, and the closing in diameter of the rib of described skeleton outer side surface is than the big 9mm of external diameter of bearing inner race.

As preferably, the outermost contact lip thickness of described Sealing is greater than the thickness of two other contact lip.

The beneficial effects of the utility model are: play lubrication by solid lubricant between bearing outer ring and bearing inner race and the rolling element, and need not to add fluid lubricant, high lubricating effect, and can not pollute, the radial interference amount of Sealing contact lip and bearing inner race outer wall strengthens, the contact lip is combined tighter with the bearing inner race outer wall, shorten the rib of skeleton, minimizing is to the containing amount of Sealing, increase the elasticity of Sealing, improved the sealability of bearing, can prevent infiltration bearing inside such as slime water in the work effectively, reduce the wearing and tearing of bearing, prolong the operating life of bearing; In addition, the thickening of the thickness of outermost contact lip lengthens itself and bearing inner race outer wall contact length, has also improved the sealability of bearing to a certain extent.

Description of drawings

Fig. 1 is structural representation of the present utility model;

Fig. 2 is the structural representation of seal ring.

Among the figure: 1, bearing outer ring; 2, bearing inner race; 3, rolling element; 4, solid lubricant; 51, skeleton; 52, Sealing; 511, rib; 521, contact lip.

Embodiment

As a kind of mode of execution of the present utility model, as depicted in figs. 1 and 2, a kind of 3 contact seal bearings, comprise bearing outer ring 1, bearing inner race 2, retainer, rolling element 3 and seal ring, the embedded inwall that is fixed on bearing outer ring 1 in the outer ring of seal ring, described seal ring is made of Sealing 52 and skeleton 51, the interior Zhou Yousan of Sealing 52 contact lip 521 that is arranged in parallel, described Sealing 52 outermost contact lip 521 thickness are greater than the thickness of two other contact lip 521, three contact lips 521 closely contact with bearing inner race 2 outer walls, described skeleton 51 outer side surfaces are provided with the rib 511 of positioning seals 52, the contact surface of the outer wall of the inwall of described bearing outer ring 1 and bearing inner race 2 and rolling element 3 all has groove, groove is embedded with solid lubricant 4, and described solid lubricant 4 is graphite; Three monolateral magnitude of interference that contact lip 521 and bearing inner race 2 outer walls are 1.2mm to 1.8mm, are preferably 1.5mm, and the closing in diameter of the rib 511 of skeleton 51 outer side surfaces is preferably 9mm than the big 8mm to 10mm of external diameter of bearing inner race 2.

Claims

1. 3 contact seal bearings, comprise bearing outer ring, bearing inner race, retainer, rolling element and seal ring, the embedded inwall that is fixed on bearing outer ring in the outer ring of seal ring, described seal ring is made of Sealing and skeleton, the interior Zhou Yousan of Sealing contact lip that is arranged in parallel, three contact lips closely contact with the bearing inner race outer wall, described skeleton outer side surface is provided with the rib of positioning seals, it is characterized in that: the contact surface of the inwall of described bearing outer ring and the outer wall of bearing inner race and rolling element all has groove, groove is embedded with solid lubricant, three monolateral magnitude of interference that contact lip and bearing inner race outer wall are 1.2mm to 1.8mm, and the closing in diameter of the rib of skeleton outer side surface is than the big 8mm to 10mm of external diameter of bearing inner race.

2. 3 contact seal bearings according to claim 1, it is characterized in that: the monolateral magnitude of interference of the outer wall of described contact lip and bearing inner race is 1.5mm, the closing in diameter of the rib of described skeleton outer side surface is than the big 9mm of external diameter of bearing inner race.

3. 3 contact seal bearings according to claim 1 and 2 is characterized in that: the outermost contact lip thickness of described Sealing is greater than the thickness of two other contact lip.