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Lubrication - definition of Lubrication in Encyclopedia (377 words) |
 | A lubricant (colloquially, lube) is a substance introduced between two moving surfaces to reduce the friction and wear between them. |
| A spectacular example of this is the result of lubricating a roller bearing with molybdenum disulphide grease. |
| Lubricants also are used to form hydrodynamic bearings. |
| Hydrodynamic lubricant seal for drill bits - Patent 4610319 (9056 words) |
| The lubricant interface is of such configuration as to induce a hydrodynamic lubricant wedging activity causing migration of lubricant film in the seal interface from the lubricant interface to the contaminant interface for flushing away any contaminant and for lubrication between the sealing element and sealing surface. |
| The invention employs a lubricant sealing element of generally circular form having a hydrodynamic shape on the lubricant side defining one or more waves, the amplitude and shape of which is selected to create a desirable amount of hydrodynamic film due to the relative rotation at the seal interface. |
| Due to the positive hydrodynamic action created on the lubricant side of the sealing element, there is a definite quantity of lubricant leakage that is pumped out across the seal interface at sealing surfaces 68 and 72 during the relative rotation between the sealing member and the rotary cutter element. |
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