CN201125960Y

CN201125960Y - Multi-lip non-contact type bearing seal structure

Info

Publication number: CN201125960Y
Application number: CNU2007200464389U
Authority: CN
Inventors: 沈忠明; 郭静瑜; 邵雪良; 邵彦; 包建飞
Original assignee: Changshu Great Wall Bearing Co Ltd
Current assignee: Changshu Great Wall Bearing Co Ltd
Priority date: 2007-09-27
Filing date: 2007-09-27
Publication date: 2008-10-01
Anticipated expiration: 2017-09-27

Abstract

The invention provides a multi-lip non-contact bearing sealing structure, which includes an outer ring, an inner ring and a sealing ring. The sealing ring is equipped between the outer ring and the inner ring and fixed in a sealing groove on the outer ring, ladder-type sealing face is arranged on inner surface of the inner ring correspondingly to the sealing ring, a grease-guiding lip extended inward and multiple grease-storing lips extended downward and having gap with sealing face of the inner ring are equipped at internal hole end of the sealing ring. The advantages of the bearing sealing structure are that: sealing effect is good, frictional moment of the sealing structure is small, and the bearing sealing structure completely accords with design requirement under 20000rpm working condition.

Description

Multiple lips non-contact type bearing seal structure

Technical field

The utility model relates to the sealing configuration that a kind of bearing is used, and particularly a kind ofly is applied to all kinds of stuffing box bearing sealing configurations that need seal request.

Background technique

To engineering goods, its structure is compact more good more.Equally, the bearing of bearing swivel bearing in engineering goods structurally requires to carry seal arrangement to save the black box of other configuration for guaranteeing the compactness of structure.Carry the bearing of seal arrangement, can fill out corresponding lubricating grease in advance to strengthen work functions and working life according to the condition of its use.Existing bearing, its seal ring generally are fixed in the seal groove of outer ring of bearing.Whether contact according to seal ring and inner ring and to be divided into contact seal and noncontact seal two classes.The contact seal structure, its good sealing effect but friction torque is big is not suitable for being used for high speed situation; The noncontact seal structure, its friction torque is very little but sealing effect is relatively poor, only is applicable to that environment is better, the occasion not high to seal request.

The stuffing box bearing that is applied under the high speed rotating operating mode needs non-contacting structural type, and requires that good sealing effect is arranged, and existing sealing configuration can not meet the demands.

Summary of the invention

Goal of the invention: the purpose of this utility model provides and a kind ofly can satisfy the multiple lips non-contact type bearing seal structure that good sealing effect and very little friction torque are arranged simultaneously when high speed operation.

Technological scheme: multiple lips non-contact type bearing seal structure described in the utility model, comprise outer ring, inner ring and seal ring, seal ring is located between the both sides of outer ring and inner ring, it is characterized in that described seal ring is fixed in the seal groove on the outer ring, position at the corresponding seal ring of the outer surface of inner ring is provided with the cascade sealing surface, and the interior nose end of seal ring is provided with leading fat lip and a plurality of downward extension and depositing the fat lip with there is the gap in sealing surface on the inner ring of extending internally.

Described seal ring is made up of skeleton and rubber.

The described fat lip of leading extends inwardly past sealing surface on the inner ring.

The described fat lip of leading is an angular shape.

Gap between the described sealing surface of depositing on fat lip and the inner ring is 0.1～0.3mm.

The described fat lip of depositing is a rectangle, adjacent deposit between the fat lip to form deposit the fat space.

Beneficial effect: the utility model compared with prior art, it is significantly a little a good sealing effect, and the friction torque of sealing configuration is little, adheres to specification fully under the operating conditions of 20000rpm.

Description of drawings

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

Fig. 2 is the schematic representation of local A among Fig. 1.

Fig. 3 deposits the fat space, the approach that lubricating grease is revealed in the arrow curve representation bearing shown in the local A among Fig. 1.

Embodiment

As shown in Figure 1, the utility model comprises outer ring 1, inner ring 2 and seal ring 5, and seal ring 5 is made up of skeleton 5a1 and rubber 5a2.

Seal ring 5 is installed in the seal groove 4 on the outer ring 1 of bearing, does not have relative movement with the outer ring.The interior nose end of seal ring 5 has three lips, and lead fat lip 6 and two of one of them wedge angle

deposit fat lip

7 and 8, and the shape of depositing the fat lip is a rectangle.Stepped sealing surface 3 on the outer surface of seal ring 5 and inner ring 2 has the gap that is approximately 0.1～0.3mm, and when bearing working, seal ring and inner ring have relative movement.

Pointed shape on the seal ring 5 lead fat lip 6, its procheilon extends beyond the sealing surface of inner ring to bearing centre, plays guiding lubricating grease and flows back to the outer round surface of bearing inner race and finally flow back to the bearing working district, shown in the arrow among Fig. 2.

Deposit the very little gap of formation between fat lip and the sealing surface for two on the seal ring 5, deposit to form between the fat lip and deposit the fat space, shown among the figure 9 and 10, when the bearing high speed rotating, can prevent effectively that the leakage of lubricating grease in the bearing and external dust or dust from entering bearing inside, shown in the arrow among Fig. 3.

The curve that arrow is arranged among Fig. 3 is the approach that lubricating grease is revealed in the bearing, can see lubricating grease difference owing to air-flow in the leakage process, can remain in place, fat space, and these fat have played the dust-tight effect again.

Claims

1, a kind of multiple lips non-contact type bearing seal structure, comprise outer ring (1), inner ring (2) and seal ring (5), seal ring (5) is located between the both sides of outer ring and inner ring, it is characterized in that described seal ring (5) is fixed in the seal groove (4) on the outer ring, the position of nose end is provided with cascade sealing surface (3) in the corresponding seal ring of the outer surface of inner ring (2) (2), and the interior nose end of seal ring (2) is provided with leading fat lip (6) and a plurality of downward extension and depositing fat lip (7) with there is the gap in sealing surface (3) on the inner ring of extending internally.

2, multiple lips non-contact type bearing seal structure according to claim 1 is characterized in that described seal ring (5) is made up of skeleton (5a1) and rubber (5a2).

3, multiple lips non-contact type bearing seal structure according to claim 1 is characterized in that the described fat lip (6) of leading extends inwardly past sealing surface (3) on the inner ring.

4,, it is characterized in that the described fat lip (6) of leading is angular shape according to claim 1 or 3 described multiple lips non-contact type bearing seal structures.

5, multiple lips non-contact type bearing seal structure according to claim 1 is characterized in that the gap between the described sealing surface of depositing on fat lip (7) and the inner ring (2) (3) is 0.1～0.3mm.

6, multiple lips non-contact type bearing seal structure according to claim 1 or 5 is characterized in that the described fat lip (7) of depositing is a rectangle, adjacent deposit to form between the fat lip deposit the fat space.