CN2844553Y

CN2844553Y - Sealer of bearing internal ring

Info

Publication number: CN2844553Y
Application number: CN 200520077348
Authority: CN
Inventors: 朱克明; 蔡旭东; 沈忠明
Original assignee: Changshu Great Wall Bearing Co Ltd
Current assignee: Changshu Great Wall Bearing Co Ltd
Priority date: 2005-11-07
Filing date: 2005-11-07
Publication date: 2006-12-06
Anticipated expiration: 2015-11-07

Abstract

The utility model relates to a sealing device of a bearing inner ring, which has a two-way sealing function. The utility model is suitable for sealing an inner ring of a rolling bearing, which has high speed rotation and high sealing requirements. The utility model comprises annular sealing grooves formed at both end parts of the bearing inner ring, and a pair of sealing check rings fixedly arranged in a bearing outer ring, wherein each sealing check ring is composed of an annular elastic sealing ring and a framework. A first lip opening, a second lip opening and a third lip opening are formed on the inner edge of each elastic sealing ring, which faces one side of the bearing inner ring, wherein the first lip opening and the third lip opening are in a clearance fit with the bearing inner ring, and the second lip opening in the middle is positioned in the annular sealing groove and is sealed and matched with the groove wall in a contact mode. The utility model has the advantages of good dustproof effect, two-way sealing performance and simple structure.

Description

The seal arrangement of bearing inner race

Technical field

The utility model relates to a kind of associated sealing arrangement for bearings, and particularly a kind of seal arrangement with bearing inner race of two way sealed effect is applicable to have high speed rotating and the sealing to enclosing within the higher rolling bearing of seal request.

Background technique

At present, be applied to high speed rotating and the sealing configuration that encloses within the higher rolling bearing that has lubricating grease of seal request is mainly contained two kinds: a kind of is the rib that is protruding with the dustproof reticulate pattern of band at the two ends of inner ring, but because the rib of the dustproof reticulate pattern of this band can't be eliminated the gap that exists between inner ring and the outer ring, therefore being difficult to eliminate dust enters in the raceway, cause raceway to block and be stuck, simultaneously, lubricating grease in the raceway can run off in the gap, bearing is often generated heat because of lacking fat, even burn; Another kind is to be fitted in slidably on the external diameter of inner ring along the contact of sealing lip line by the interior of a pair of annular resilient seal back-up ring that is fixedly arranged in the bearing outer ring; by this interior of elastic packing back-up ring cooperated the sealing that realizes bearing inner race along sealing lip with the slight interference of inner ring external diameter; though this sealing configuration can effectively prevent dust and enter in the bearing and eliminate the obstruction of raceway; but for preventing that the excessive effect of lubricating grease in the raceway is very little; this mainly shows: when the lubricating grease of raceway inside when the inwall of elastic packing back-up ring slides to inner ring; exist the fluid dynamic high pressure that produces when inner ring and elastic packing back-up ring are done relative movement in both contacting points; when the fluid dynamic high pressure overcomes the pretightening force of sealing lip generation; the leakage of lubricating grease can be between sealing lip and bearing inner race, formed thus, thereby bearing can't be protected.

Summary of the invention

Even the purpose of this utility model is to provide a kind of bearing that also can make when running up to obtain seal arrangement excellent sealing and sufficient lubrication and bearing inner race simple in structure.

The purpose of this utility model reaches like this, a kind of seal arrangement of bearing inner race, it comprises the annular seal groove 41 that is formed on end, bearing inner race 4 two ends, be fixedly arranged in the bearing outer ring 2 and with annular seal groove 41 corresponding a pair of Sealing shield rings 1, described a pair of Sealing shield ring 1 is to be made of the elastic seal ring 12 of ring-type and skeleton 11,12 of elastic seal rings in ring-type are formed with first respectively on the interior edge of bearing inner race 4 one sides, second, the 3rd lip 121,122,123, wherein first, the 3rd lip 121,123 and bearing inner race 4 between form Spielpassung, the second middle lip 122 then described annular seal groove 41 in and and the cell wall of annular seal groove 41 between form the subsides property touched and be sealed and matched.

Described in the utility model being formed in the elastic seal ring 12 distributes along being interdigitated between the first, second, third last lip 121,122,123.

The utility model becomes to have first cavity 5 by enclosure between annular seal groove 41 threes of described first, second lip 121,122 and bearing inner race 4, and becomes to have second cavity 6 by enclosure between annular seal groove 41 threes of second, third lip 122,123 and bearing inner race 4.

The sectional shape of annular seal groove 41 described in the utility model is trapezoidal.

The utility model is owing to after adopting said structure, have good dustproof effect and ultimate attainment two way sealed performance, and structure is very simple.

Description of drawings

Fig. 1 is an example structure figure of the present utility model.

Fig. 2 is the partial enlarged drawing of Fig. 1.

Fig. 3 is the structural drawing of elastic packing back-up ring 1 of the present utility model.

Embodiment

See also Fig. 3, Fig. 3 has provided the structural drawing of Sealing shield ring 1 of the present utility model.It is to be made of skeleton 11, elastic seal ring 12, and described skeleton 11 is the eyelet of ring-type, generally can select for use steel plate to be stamped to form; Described elastic seal ring 12 also is a ring-type, generally can select rubber seal for use, on the inner side surface of elastic seal ring 12, be formed with the annular groove 13 that matches with skeleton 11 shapes, the size of annular recess 13 should be slightly less than the boundary dimension of skeleton 11, like this, in skeleton 11 is contained in groove 13, by the elasticity of Bond and elastic seal ring 12 both are fixed together, respectively be formed with first on the edge at the inner ring edge of the elastic seal ring 12 of ring-type promptly, second, the 3rd lip 121,122,123, the first, second, the 3rd lip 121,122, being interdigitated between 123 distributes.

See also Fig. 1,2, this two width of cloth figure has illustrated the utility model to be applied to the seal arrangement of ball bearing inner ring, it is that offer a pair of sectional shape in the end, two ends of bearing inner race 4 external diameters be trapezoidal annular seal groove 41, a pair of Sealing shield ring 1 is located at the raceway both sides of ball 3 respectively symmetrically, its edge, outer ring is that the outer is separately fixed in the groove of end, bearing outer ring 2 internal diameter two ends, and tool first, second, the 3rd lip 121,122,123 interior edge then corresponds respectively to a pair of annular seal groove 41, wherein, first, the 3rd lip 121,123 and bearing inner race 4 external diameters between form Spielpassung respectively, the second middle lip 122 then described ring packing groove 41 in and and the cell wall of ring packing groove 41 between form being sealed and matched that subsides touch, and therefrom by first, second lip 121,122 and annular groove 41 threes of bearing inner race 4 between enclosure become first cavity 5 is arranged, and by second, the 3rd lip 122,123 and annular groove 41 threes of bearing inner race 4 between enclosure become to have second cavity 6.

Now narrate two way sealed mechanism of the present utility model in conjunction with the accompanying drawings: when bearing in when work, lubricating grease in ball 3 raceways slides to bearing inner race 4 along the inwall of Sealing shield ring 1, at first lip, 121 gap locations owing to there is the airflow influence of bearing inner race 4 and Sealing shield ring 1 relative movement, most of grease flow is to the surface of bearing inner race 4, small part lubricating grease is then entered in the cavity 5 by gap location, because the seal action of second lip 122, lubricating grease is accumulated in the cavity 5, no longer to external leakage; And for the dust of outside, because Sealing shield ring 1 has formed aeroseal with the air-flow that the relative operation of bearing inner race 4 forms at the gap location of the 3rd lip 123, only there is a spot of dust to enter in the cavity 6, again because second lip 122 is the subsides property touched sealing lip, thereby dust can only be accumulated in the cavity 6 and can not enter bearing inside, thereby can realize sealing to the outside.

Claims

1, a kind of seal arrangement of bearing inner race, it is characterized in that it comprises the annular seal groove (41) that is formed on bearing inner race (4) end, two ends, be fixedly arranged in the bearing outer ring (2) and with the corresponding a pair of Sealing shield ring of annular seal groove (41) (1), described a pair of Sealing shield ring (1) is to be made of the elastic seal ring (12) of ring-type and skeleton (11), the elastic seal ring (12) of ring-type be formed with first towards the interior of bearing inner race (4) one sides respectively along last, second, the 3rd lip (121), (122), (123), wherein first, the 3rd lip (121), (123) and between the bearing inner race (4) form Spielpassung, middle second lip (122) then be positioned at described annular seal groove (41) and and the cell wall of annular seal groove (41) between form the subsides property touched and be sealed and matched.

2, the seal arrangement of bearing inner race according to claim 1 is characterized in that described being formed in the elastic seal ring (12) distributes along being interdigitated between last first, second, third lip (121), (122), (123).

3, the seal arrangement of bearing inner race according to claim 1 and 2, it is characterized in that becoming to have first cavity (5), and become to have second cavity (6) by enclosure between annular seal groove (41) three of second, third lip (122), (123) and bearing inner race (4) by enclosure between annular seal groove (41) three of described first, second lip (121), (122) and bearing inner race (4).

4, the seal arrangement of bearing inner race according to claim 1, the sectional shape that it is characterized in that described annular seal groove (41) is trapezoidal.