CN201193658Y

CN201193658Y - Three-lip contact type sealed bearing

Info

Publication number: CN201193658Y
Application number: CNU2008200343849U
Authority: CN
Inventors: 陆全; 王春南; 杨怀庆; 朱维国; 赵建文; 杨龙妹
Original assignee: 陆连运
Priority date: 2008-04-23
Filing date: 2008-04-23
Publication date: 2009-02-11
Anticipated expiration: 2018-04-23

Abstract

The utility model relates to a sealed bearing with three-lip contacting type, comprising a bearing outer ring, a bearing inner ring, a maintaining shelf, a rolling body and a sealing ring. The sealing ring is provided with a sealing piece and a skeleton; the inner circumference of the sealing piece is provided with three parallel contacting lips which are contacted tightly with the outside diameter surface of the bearing inner ring; the monolateral interference between the contacting lips and the outside diameter surface of the bearing inner ring is 1.2 mm-1.8 mm; the thickness of the outmost contacting lip is more than that of the other two contacting lips; the outer side surface of the skeleton is provided with a guard lip for locating the sealing piece, and the closing diameter of the guard lip is more than the outside diameter of the bearing inner ring by 8 mm-12 mm; the outer ring of the sealing ring is embedded in and fixed on the inner surface of the bearing outer ring. The sealed bearing with three-lip contacting type has a good sealing performance, can prevent the dust, the mud water and such impurities going into the inside of the bearing and can prevent the lubricants inside the bearing from leakage, thus reducing the bearing friction and prolonging the service life of the bearing.

Description

Three lips contact type seal bearing

Technical field

The utility model relates to technical field of bearings, especially a kind of three lips contact type seal bearing.

Background technique

Pump machines, the working environment of equipment such as oilfield machinery is very abominable, its workpiece usually turns round being mixed with in the place of muddy water, sealability and operating life to the bearing that uses requires very high thus, the seal ring that carries on original this bearing, as shown in Figure 3, have Sealing 7 and skeleton 6, the interior Zhou Yousan of Sealing 7 the identical contact lip 71 of thickness that is arranged in parallel, contact with the outer diametric plane of bearing inner race, contact lip 71 is about 0.4mm with the monolateral magnitude of interference of the outer diametric plane of bearing inner race, skeleton 6 outer side surfaces have the rib 61 of positioning seals, its closing in diameter than the big 1.0mm of bearing inner race external diameter about, this structure makes the contact lip 71 of Sealing 7 and the magnitude of interference between the bearing inner race external diameter too small, the containing of 6 pairs of Sealings 7 of skeleton is too much, the elasticity deficiency of Sealing 7, 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, and slime water is easy to infiltrate bearing inside, and 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.

The model utility content

The technical problems to be solved in the utility model is: the problem that the sealability when bearing is worked under rugged environment reduces, the utility model provides a kind of three lips contact type seal bearing, when this bearing is worked under the rugged environment that contain sposh water etc., also has excellent sealing performance, thereby reduce the wearing and tearing of bearing, prolong the operating life of bearing.

The technological scheme that its technical problem that solves the utility model adopts is: a kind of three lips contact type seal bearing, has bearing outer ring, bearing inner race, retainer, rolling element, seal ring, described seal ring has Sealing and skeleton, the interior Zhou Yousan of described Sealing contact lip that is arranged in parallel, three contact lips closely contact with the outer diametric plane of bearing inner race, described skeleton outer side surface has the rib of positioning seals, the embedded internal surface that is fixed on bearing outer ring in the outer ring of seal ring, the monolateral magnitude of interference of the outer diametric plane of described contact lip and bearing inner race is 1.2mm～1.8mm, and the closing in diameter of the rib of described skeleton outer side surface is than the big 8mm～12mm of bearing inner race external diameter.

The monolateral magnitude of interference of the outer diametric plane of described furtherly 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 10mm of bearing inner race external diameter, and the contact lip thickness of described seal ring ragged edge contacts lip thickness greater than two other.

The sealing member material of described seal ring is a rubber, and the material of skeleton is a sheet metal.

The beneficial effects of the utility model are, after the utility model adopts above scheme, the radial interference amount of Sealing contact lip and the outer diametric plane of bearing inner race strengthens, the contact lip combines tighter with the outer diametric plane of bearing inner race, the thickening of contact lip thickness, itself and the outer diametric plane contact length of bearing inner race are extended, shorten the rib of skeleton, minimizing is to the containing amount of Sealing, strengthen 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.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

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

Fig. 2 is the structural representation of the used seal ring of the utility model.

Fig. 3 is the structural representation of the used seal ring of original technology.

1. bearing outer rings, 2. bearing inner races, 3. retainers, 4. rolling elements, 5. seal rings, 51. Sealings, 511. contact lips, 512. contact lips, 513. contact lips, 52. skeletons, 521. ribs, 6. skeletons, 61. ribs, 7. Sealings, 71. contact lips among the figure

Embodiment

The three lips contact type seal bearing shown in Figure 2 as Fig. 1, has bearing outer ring 1, bearing inner race 2, retainer 3, rolling element 4, seal ring 5, the embedded internal surface that is fixed on bearing outer ring 1 in the outer ring of seal ring 5, the quantity of seal ring 5 is two, is symmetrical arranged with respect to rolling element 4, described seal ring 5 has Sealing 51 and skeleton 52, interior Zhou Yousan contact lip 511,512,513 that is arranged in parallel at Sealing 51, three contact lips 511,512,513 closely contact with bearing inner race 2 outer diametric planes, contact lip 511,512,513 with the monolateral magnitude of interference of bearing inner race 2 outer diametric planes be 1.5mm, can make to contact lip 511,512,513 combine tightr with bearing inner race 2 outer diametric planes, contact lip 511 thickness of seal ring 5 ragged edges are greater than two other contact lip 512,513 thickness, and seal ring 5 and bearing inner race 2 outer diametric plane contact lengths have extended, Sealing 51 materials of seal ring 5 are rubber, and commonly used is butyronitrile rubber.Described skeleton 52 outer side surfaces have the rib 521 of positioning seals, the closing in diameter of this rib 521 is than the big 10mm of bearing inner race 2 external diameters, can shorten rib 521 length of skeleton 52 like this, reduce its containing amount to Sealing 51, strengthen the elasticity of Sealing 51, the material selection sheet metal of skeleton 52.

Three lips contact type seal bearing of the present utility model, when bearing is static, three contact lips 511 that closely contact with bearing inner race 2 outer diametric plane interference fit on the seal ring 5,512,513, can prevent extraneous dust effectively, impurity such as muddy water enter leaking of bearing inside and bearing internal lubrication grease, during bearing operation, the bearing temperature inside makes the bearing gas inside expand greater than ambient temperature, formation is to the outside thrust of seal ring 5, because seal ring 5 is an interference fit with bearing inner race 2 outer diametric planes, make three to contact lips 511,512,513 are valgoid, seal ring 5 and bearing inner race 2 outer diametric plane contact lengths are longer when static, and the elasticity of adding Sealing 51 strengthens, thereby has improved the sealability of bearing greatly, reduce the wearing and tearing of bearing, prolong the operating life of bearing.

Claims

1. three lips contact type seal bearing, has bearing outer ring (1), bearing inner race (2), retainer (3), rolling element (4), seal ring (5), described seal ring (5) has Sealing (51) and skeleton (52), the interior Zhou Yousan of Sealing (51) contact lip (511,512 that is arranged in parallel, 513), three contact lips (511,512,513) closely contact with the outer diametric plane of bearing inner race (2), described skeleton (52) outer side surface has the rib (521) of positioning seals (51), the embedded internal surface that is fixed on bearing outer ring (1) in the outer ring of seal ring (5) is characterized in that: described contact lip (511,512,513) the monolateral magnitude of interference with the outer diametric plane of bearing inner race (2) is 1.2mm～1.8mm, and the closing in diameter of the rib (521) of described skeleton (52) outer side surface is than the big 8mm～12mm of bearing inner race (2) external diameter.

2. three lips contact type seal bearing according to claim 1, it is characterized in that: described contact lip (511,512,513) the monolateral magnitude of interference with the outer diametric plane of bearing inner race (2) is 1.5mm, and the closing in diameter of the rib (521) of described skeleton (52) outer side surface is than the big 10mm of bearing inner race (2) external diameter.

3. three lips contact type seal bearing according to claim 1 and 2 is characterized in that: contact lip (511) thickness of described seal ring (5) ragged edge contacts lip (512,513) thickness greater than two other.

4. three lips contact type seal bearing according to claim 1 is characterized in that: Sealing (51) material of described seal ring (5) is a rubber, and the material of skeleton (52) is a sheet metal.