The commonly used one is non- contact-type to seal chink to seal, get rid of various forms such as oil ring sealing and maze sealing,etc.. Store interval in, besides getting rid of the oil ring to seal, seal, used in more lipoprotein, lubricate occasion while being contact-type non-. In order to improve sealed dependability, it can be in order to combine and use that all kinds of are sealed.
Because non- contact-type sealed the intersection of interval and of seal installation, have to rub inside lubricant, will not present any other friction, so, only if contact-type will not produce the abrasion to seal, duration is very long either produce obvious Wen Sheng, very applicable in the place taller in rotational speed. But the sealed interval can’t be too big, otherwise the sealed result is extremely bad.
The bearing is propped up it is sealed that what has been ridden the position is non- contact-type:
The interval is sealed: Simple in construction, can meet the sealed requirement under the general condition. The choice d of the interval e is less than or equal to 50mm, e =0.25- 0.40mm; d> 50mm, e =0.25- 0.6mm.
The cannelure is sealed: Pack lubricating grease in the cannelure, make the dust difficult to invade, there are two kinds of forms of ring trough and spiral trough. Rings trough generally there are 3. Width b of the trough =3- 5mm; Trough deep t =4- 5mm.
The maze is sealed: After No. of the song packs lubricating grease in the maze, its sealed result is sealed good than the cannelure. The maze is sealed and can be divided into two kinds of forms of radial and axial. The choices of radial and axial interval: D is less than or equal to 50mm, a =0.20- 0.30mm, b =1.0- 1.5mm; d =50- 200mm, a =0.30- 0.50mm, b =1.5- 2.0mm.
It is sealed to the maze that oblique: When it is larger that used in the axle deflection, the way inclined plane of the song can be swung with the centre. Oblique can reach better sealed result after packing lubricating grease in the sealed song road of the maze.
Press the steel sheet maze to seal: Press synthetic maze that steel sheet make up, seal, it it presses steel sheet to be can by cooperate, install at the axle or shell, do not need to fasten axially, simple in construction. If pack lubricating grease in pressing the song road to the steel sheet maze, have better sealed results.
Get rid of the oil ring to seal: When the oil is lubricated, open the cannelure on the axle and or hold a ring, can all throw out the oil wanted to run off outwards along the radial, collection oil and oil hole covered through the bearing flow back to the oil pool. Also can be sticking to the bearing and holding and getting rid of the oil ring closely, this kind of structure is being often sealed and jointly used with the chink.
