| Home>Bearing knowledge>Arrangement and sealing principle of skeleton oil seal |
Skeleton oil seal layout and sealing principle
| /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089'; |
Skeleton oil seal is relatively simple; generally there are three components: oil seal body, reinforcing skeleton and self-tightening spiral spring. Seal body is divided into bottom, waist, cutting edge and sealing lip according to different parts. Generally; skeleton in free condition Oil seal; its inner diameter is larger than the shaft diameter. Therefore, after the oil is packed into the oil seal seat and the shaft; the pressure of the oil seal edge and the shortening force of the self-tightening spiral spring have a certain diameter on the shaft. Tightening force; after working for a period of time; the pressure will be agilely reduced or even disappeared; thus; plus the spring can compensate the oil seal self-tightening force at any time.
Sealing principle:
Because there is an oil film operated by the oil seal edge between the oil seal and the shaft; the oil film has fluid smoothness. Under the effect of liquid surface tension; the stiffness of the oil film just makes the oil film and the air touch end form a crescent; avoiding the operation The leakage of the medium; then the sealing of the rotating shaft. The sealing of the oil seal; the thickness of the oil film on the sealing surface; the thickness is too large; the oil seal leaks, the thickness is too much. 赡芊(5) 赡Σ 鹩 鹩 夂 夂胫嶂涿 胫嶂涿 æ¹ãƒ æ¹ãƒ æ¹ãƒ 蛞滓鸱 蛞滓鸱 蛞滓鸱 4 4 4 4 4 4 4 4
Therefore; in the device; must apply some oil on the seal; together to ensure that the skeleton oil seal and the shaft line straight; if not straight; the oil seal lip will drain the smooth oil from the shaft; it will also lead to excessive seal lips Wear and tear; in the work; the smoothing agent in the shell gently oozes a little; the most ambition to reach the oil film at the sealing surface.
Recommend to friends comments close window
| Bearing related knowledge |
| Timing smooth protection of the bearing Cp-4617-5-f: Lubricating oil for gears and bearings NSK gas smooth bearing stainless steel bearing technology AC bearing casting method and target |
This article links to http://
Please indicate the bearing network http://
Previous:Five kinds of rolling bearing features commonly used in machine tool occupations. Next: Cooperation and skill requirements for high-speed bearings
Reel Hose can keep shape, it has light weight,high-pressure resistance and small flow-resistance.
applications in Fire-fighting; Shipping; petroleum;agriculture;Mining,garden,Color available:white;red;yellow; or as per customer`s instruction.standard:GB6246,EN14540,UNI9487; or as per customer`s instruction. standard length:10M upto 40M
PRESSURE REQUIRED:
|
I.D. (inch/mm) |
Working pressure (Bar / Mpa / Psi) |
Burst pressure (Bar / Mpa / Psi) |
|||||
|
3/4`` |
19 |
13-30 |
1.3-3.0 |
190-435 |
39-90 |
3.9-9.0 |
570-1305 |
|
1`` |
25 |
13-30 |
1.3-3.0 |
190-435 |
39-90 |
3.9-9.0 |
570-1305 |
|
1-1/4`` |
32 |
13-30 |
1.3-3.0 |
190-435 |
39-90 |
3.9-9.0 |
570-1305 |
Reel Hose
Canvas Fire Hose,Canvas Hose,Pu Canvas Fire Hose,Pvc Canvas Fire Hose
NANTONG SENTIAN FIRE-FIGHTING EQUIPMENT CO.,LTD. , http://www.firehosefactory.com