FIELD: hydraulic mechanical engineering.
SUBSTANCE: plunger comprises load-bearing rod and conical bushings provided with conical faces and mounted on the load-bearing rod for permitting axial movement. The conical faces form grooves diverging toward the load-bearing rod, and the spacer and sealing rings are made in block from the flexible ring having trapezoidal cross-section.
EFFECT: simplified structure.
3 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| PLUNGER FOR OIL-WELL SUCKER-ROD PUMP | 1995 |
|
RU2072450C1 |
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RU2368803C1 |
| DEEP-WELL PUMP PLUNGER | 1992 |
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|
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|
RU2265752C2 |
| 0 |
|
SU503042A1 |
