CN2818405Y

CN2818405Y - Sealer of roller bearing seat

Info

Publication number: CN2818405Y
Application number: CN 200520007393
Authority: CN
Inventors: 宇尔荣; 余登思; 贺喜; 周夏平; 寻伟基; 宗高进
Original assignee: SANJIA SCIENCE AND TECHNOLOGY Co Ltd TONGLING
Current assignee: SANJIA SCIENCE AND TECHNOLOGY Co Ltd TONGLING
Priority date: 2005-03-26
Filing date: 2005-03-26
Publication date: 2006-09-20
Anticipated expiration: 2015-03-26

Abstract

The utility model discloses a sealer of a roller bearing seat. A plurality of bent labyrinth type gap passages [11] formed by a plurality of annular bulges [10] and grooves nested with the annular bulges [10] are arranged on the corresponding end surfaces of an inner and an outer sealing rings [4, 3] of the sealer of roller bearing seat, and the length of water and dust invading the passages is prolonged so that the structure is suitable for working environment with bad conditions; the inner side of a protecting cover [8] of the outer end of the inner sealing ring [4] is an annular groove with a flat bottom, an annular platform [9] matched with the outer sealing ring [3] is arranged on the outer sealing ring [3], the depth of a bore hole for installing a barrel body [1] of a bearing seat is reduced so that the barrel body is not easy to deform, therefore the service life of a support roller is extended.

Description

A kind of sealing arrangement of roller carrier shaft bearing

Technical field

The utility model is the sealing arrangement that directly applies to the roller carrier shaft bearing on the belt conveyer.

Background technology

Carrying roller is the universal component of a consumption maximum on the belt conveyer, and the quality of its quality directly influences the service life of carrying roller quality and even belt conveyer.The disclosed a kind of roller carrier shaft bearing of Chinese patent ZL200320119923 (TKII type), its carrying roller hermetically-sealed construction is to use comparatively general a kind of hermetically-sealed construction on the belt conveyer, form by pedestal and the inside and outside seal ring of bearing, labyrinth type that is installed in the pedestal, on the corresponding end face of inside and outside seal ring mutually nested annular protrusion and groove are arranged, cooperatively interact the back at centre formation labyrinth gap passage, and there is the water proof and dust proof guard shield of annular inner seal ring outer end and pedestal large end face corresponding position.There is annular groove guard shield inboard in the inner seal ring outer end, and the annular protrusion with above-mentioned groove fit is arranged on the exterior seal ring.The outer ring of pedestal is fixed by welding on the cylindrical shell of carrying roller, and the endoporus of outer gland sealing, bearing cone are fixed on the roller carrier shaft, and the roller carrier shaft in the outside of outer gland sealing is provided with back-up ring.Water and dust must could arrive position of bearings through the labyrinth gap passage in the middle of the inside and outside sealing, can prevent the intrusion of sealing and dust effectively, play the effect of protection bearing.But, because the length of the labyrinth passage between the inside and outside seal ring is shorter, waterproof and antisoiling performance are restricted, so suitable the use at working environment of the carrying roller of this structure used preferably in the open, for the downhole coal mine of work under bad environment, the less use of the carrying roller of this structure.And because the water proof and dust proof guard shield height of the outer end projection of inner seal ring is higher, when mounted, the boring depth on the cylindrical shell of carrying roller reaches 15mm, has increased manufacturing cost.Boring depth is dark, causes carrying roller that the barrel distortion of carrying roller easily takes place in manufacturing, installation, storage and transport process, influences the normal use of carrying roller.

Summary of the invention

To be solved in the utility model is that the passage that exists of the sealing arrangement of above-mentioned roller carrier shaft bearing is short and be not suitable for using under the condition of work under bad environment, and the higher problem that makes that cylindrical shell is yielding, influences the normal use of carrying roller of water proof and dust proof guard shield height.

The utility model proposes a kind of sealing arrangement of roller carrier shaft bearing, in labyrinth type, exterior seal ring is formed, in, mutually nested annular boss of multiple tracks and groove are arranged on the corresponding end face of outer gland sealing, the labyrinth gap passage of back in the bending of centre formation multiple tracks cooperatively interacts, there is the water proof and dust proof guard shield of annular the outer end of inner seal ring and pedestal large end face corresponding position, water and dust are through the gap between guard shield and the pedestal large end face, in passing through again, the labyrinth gap passage of the multiple tracks bending of the mutually nested formation of exterior seal ring could arrive position of bearings, because the middle labyrinth gap passage that the multiple tracks bending is arranged, prolonged the length of water and dust invasive channel, made this structure suit under the condition of work under bad environment, to use.

For the cylindrical shell that solves carrying roller yielding, influence the problem of the normal use of carrying roller, the guard shield inboard of inner seal ring outer end is made as annular flat bottomed recess, ring-shaped platform with above-mentioned groove fit is arranged on the exterior seal ring, can reduce the height of water proof and dust proof guard shield like this, do not influence the functions of waterproof and dustproof of the water proof and dust proof guard shield of annular on the one hand, can make the boring depth of the carrying roller cylinder that the pedestal place is installed be reduced to 8mm (be original design half) greatly on the other hand, can improve the strength and stiffness of carrying roller cylinder effectively, solve the yielding problem of cylindrical shell, prolonged the service life of carrying roller.

Description of drawings

Fig. 1 is the utility model roller carrier shaft bearing schematic diagram of sealing device.

The specific embodiment

By shown in Figure 1, the outer ring of bearing seat 2 is fixed by welding on the cylindrical shell 1 of carrying roller, and bearing 7 is fixed on pedestal 2 bottoms, and the inner hole sleeve of inner seal ring 4 is on roller carrier shaft 6, and the inner seal ring outer end is by back-up ring 5 location that are provided with on the roller carrier shaft.On inside and outside seal ring 4, the 3 corresponding end faces mutually nested twice annular boss 10 and groove are arranged, the back that cooperatively interacts forms the labyrinth gap passage 11 of twice bending in the centre, utilize the bearing seat inner space to prolong the length of labyrinth channel 11 like this.Annular boss also can be arranged to three roads or four roads, and the length of passage 11 is increased; The outer end of inner seal ring 4 and pedestal 2 large end face corresponding positions are provided with the water proof and dust proof cover 8 of annular, guard shield 8 inboards are annular flat bottomed recess, the ring-shaped platform 9 that cooperates with guard shield 8 interior annular flat bottomed recess is arranged on the exterior seal ring 3, can reduce the height of water proof and dust proof guard shield of the outer end of exterior seal ring like this, make the boring depth that pedestal 2 place's cylindrical shells 1 are installed be reduced to 8mm (be original design half), can improve the strength and stiffness of carrying roller cylinder effectively, solve the yielding problem of cylindrical shell, prolonged the service life of carrying roller.Water and dust must be walked around the middle twice labyrinth of inside and outside sealing and could arrive position of bearings through the gap between guard shield and the pedestal large end face again, can prevent the intrusion of sealing and dust effectively, have improved sealing effectiveness, play the effect of protection bearing.

Claims

1, a kind of sealing arrangement of roller carrier shaft bearing, in labyrinth type, exterior seal ring [4,3] form, in, exterior seal ring [4,3] mutually nested annular protrusion [10] and groove are arranged on the corresponding end face, cooperatively interact the back at centre formation labyrinth gap passage [11], there is the water proof and dust proof guard shield [8] of annular inner seal ring [4] outer end and pedestal [2] large end face corresponding position, in it is characterized in that, exterior seal ring [4,3] mutually nested annular protrusion of multiple tracks [10] and groove are arranged on the corresponding end face, the back that cooperatively interacts forms the labyrinth gap passage [11] of multiple tracks bending in the centre; Guard shield [8] inboard of inner seal ring [4] outer end is annular flat bottomed recess, and the ring-shaped platform [9] with groove fit at the bottom of the inboard annular flat of guard shield [8] is arranged on the exterior seal ring [3].