Cryogenic(Low temperature) bearing is one of the important components of cryogenic liquid pump.The bearing is mainly classified into two categories:deep groove ball bearing and angular contact ball bearing. The material of rings is 9Cr18Mo stainless steel which can have long life because of special processing,while it may use exported Cronidur30(X30 CrMoN15-2) with rich Nitrogen,but its price is very expensive. The rolling elements of bearing mostly are ceramic ball which is made of Si3N4.
.The cage is made of self-lubricated,anti-wear and low-temperature resistance material.The base material of it is PTFE with enhanced glass fiber and MoS2(self-lucubration material).When bearing rotates,during fabrication, the trip of PTFE is constantly adhered and rolled and then gradually formed transfer film on the raceway. With the thickness of 100μm.
High quality material and special processing makes bearing with excellent anti-corrosive,anti-wear and anti-fatigue characteristics,so bearing will have higher reliability and longer life,and customer maintaining time will be reduced and production efficiency will be improved.
The features of bearing:
1.Work in ultra-low temperature from -120℃ to -196℃。During operation，there is no lubricant but lubricated by medium inpump.
2.Lubrication environment is very harsh and it is required that bearing has long life. Special material and structure design reducethe friction coefficient so that the heat caused by friction is reduced,therefore the bearing work long and reliably.
3.The precision of low temperature bearing is P5 and P4,but all of our products is up to grade P4 at present.
4.The clearance of C3 group is chosen.
5.Vacuum package is adopted.
我们的产品
Cases
Our products have been used in cryogenic pump manufactures and substitute for imported bearings. The service life of our products is more than one year.
Medium
Low temperature bearing can be used in :LN2,LO2,LH2,LAr,LNG,CNG,LPG,liquid CH4 and liquid C2H4,etc.
Product list
| 型号 | d (Inner diameter) | D (Outer diameter) | B (width) | rsmin | Cr(KN) | Cor(KN) | Limit speed (r/min) |
| 6205 | 25 | 52 | 15 | 1.0 | 14.0 | 7.8 | 17000 |
| 6206 | 30 | 62 | 16 | 1.0 | 19.3 | 11.2 | 14000 |
| 6207 | 35 | 72 | 17 | 1.1 | 25.5 | 15.3 | 12000 |
| 6208 | 40 | 80 | 18 | 1.1 | 29.0 | 18.0 | 11000 |
| 6209 | 45 | 85 | 19 | 1.1 | 31.0 | 20.4 | 10000 |
| 6210 | 50 | 90 | 20 | 1.1 | 36.5 | 24.0 | 9500 |
| 6211 | 55 | 100 | 21 | 1.5 | 43.0 | 29.0 | 8500 |
| 6213 | 65 | 120 | 23 | 1.5 | 58.0 | 41.5 | 7000 |
| 6215 | 75 | 130 | 25 | 1.5 | 64.0 | 48.0 | 6800 |
| 6217 | 85 | 150 | 28 | 2.0 | 82.5 | 62.0 | 6500 |
| 6305 | 25 | 62 | 17 | 1.1 | 22.0 | 11.0 | 22000 |
| 6308 | 40 | 90 | 23 | 1.5 | 42.5 | 25.0 | 11000 |
| 6311 | 55 | 120 | 29 | 2.0 | 76.0 | 47.5 | 10000 |
| 6314 | 70 | 150 | 25 | 2.1 | 102.0 | 66.0 | 9000 |
| 6318 | 90 | 190 | 43 | 3.0 | 132 | 100 | 6000 |
| 6320 | 100 | 215 | 47 | 3.0 | 160 | 130 | 5700 |
| 6322 | 110 | 240 | 50 | 3.0 | 190 | 165 | 5400 |
| 6328 | 140 | 300 | 62 | 4.0 | 255 | 250 | 4000 |
Note:The value in the table is limit rotation speed in the normal lubrication.The rated load and limit rotation speed only for reference.
