FIELD: engines and pumps.
SUBSTANCE: plunger pair and metering pump comprises at least one external part of crystal based on aluminium oxide alpha-modification and at least one internal part of crystal based on aluminium oxide alpha-modification, preferably, leucosapphire with working surface roughness Ra2÷5Å. Said surface smoothness is brought about by processing the cylindrical surfaces of part of crystal based on aluminium oxide alpha-modification. This method comprises drilling the preliminary blanks of part of crystal based on aluminium oxide alpha-modification with the help of diamond tool. Three-stage mechanical processing is performed by diamond tool with lubricant-coolants and sequential decreased in abrasive grain size to 125/100 and/or 100/80 mcm. Internal strain is removed from blanks by annealing at muffle furnace. Surface is processed by semisoft or soft grinding wheel or by lap with diamond 5/3 mcm or 1/0 mcm grain on clock oil. Tribochemical finishing of the surface is performed by colloidal SiO2-based composition.
EFFECT: longer life, higher metering precision.
12 cl
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PROCESSING FRICTION SURFACES OF PARTS FROM ARTIFICIALLY GROWN MONOCRYSTAL BASED ON ALPHA-AlO | 2014 |
|
RU2585885C2 |
| HYDRAULIC DEVICE OF VOLUMETRIC DISPLACEMENT FOR PUMPING AND/OR PROPORTIONING LIQUIDS | 2014 |
|
RU2578373C2 |
| PLUNGER PAIR | 2003 |
|
RU2240733C1 |
| PLUNGER COUPLE FOR SURGICAL INSTRUMENTS, APPARATUSES, DEVICES AND METHOD OF ASSEMBLING PLUNGER COUPLE FOR SURGICAL INSTRUMENTS, APPARATUSES, DEVICES | 2005 |
|
RU2314762C2 |
| DISPENSING PUMP | 2014 |
|
RU2580892C1 |
| SAPPHIRE SUBSTRATE (VERSIONS) | 2007 |
|
RU2414550C1 |
| DENTAL IMPLANT AND INSTRUMENT FOR SETTING THE IMPLANT | 2005 |
|
RU2290894C1 |
| METHOD OF MACHINING SAPPHIRE SUBSTRATE | 2007 |
|
RU2422259C2 |
| LOT OF SAPPHIRE SUBSTRATES AND METHOD OF ITS PRODUCTION | 2007 |
|
RU2412037C1 |
| POLISHING SLURRY FOR SAPPHIRE SUBSTRATES | 2017 |
|
RU2635132C1 |
