FIELD: hydraulically-driven positive-displacement pumps; equipment of pumping plants and stations in various industries; oil fields for maintenance of pressure in oil strata. SUBSTANCE: pump includes housing with systems of seals built up from members interconnected together. Working member reciprocating in housing is made in form of disk with plungers secured on it. Plungers are provided with shock absorbers. Disk has drain holes and circular member for engagement with working member position sensors mounted on housing. At least one plunger and respective member of housing may be changeable; changeable parts differ in diameters of sealing surfaces. Systems of seals may be mounted in separate bushes secured in housing for replacement. EFFECT: enhanced reliability. 9 cl, 3 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF STABILIZATION OF OUTPUT PARAMETERS OF HYDROPISTON PUMPING UNIT | 1995 |
|
RU2100647C1 |
| SURFACE REPAIR METHOD | 1997 |
|
RU2125508C1 |
| PIPE WITH POLYMERIC SHELL | 1995 |
|
RU2100683C1 |
| METHOD OF MANUFACTURE OF METAL-FIBER-REINFORCED PLASTIC PIPE | 1997 |
|
RU2115554C1 |
| PLANT TO COLLECT AND TRANSPORT PRODUCTION OF OIL WELLS | 1996 |
|
RU2105236C1 |
| METHOD OF INTERFERENCE CONNECTION OF PARTS AT DIFFERENT COEFFICIENTS OF THERMAL EXPANSION | 1997 |
|
RU2123622C1 |
| PIPE WITH INNER PROTECTIVE COATING | 1997 |
|
RU2132013C1 |
| METHOD FOR APPLICATION OF HEAT-INSULATING COATING ONTO PIPE | 1997 |
|
RU2136495C1 |
| METHOD OF MANUFACTURE OF METALLOPLASTIC PIPE | 1997 |
|
RU2138723C1 |
| VARIABLE-SPEED DRIVE | 1998 |
|
RU2148748C1 |
