FIELD: engines and pumps.
SUBSTANCE: pump unit comprises drive, top and bottom planter pumps coupled with appropriate stem. Besides, it comprises casing, cross-beam and common hollow stem. The latter is attached to cross-beam top part. Stems to top and bottom plunger pumps are attached to cross-beam from below. Stem of top plunger pump is hollow to communicated with hollow plunger of said pump and channel made in cross-beam, with common hollow stem. Bottom plunger pump stem is arranged between top plunger pump cylinder pump unit casing. Top plunger pump is displaced relative to pump unit casing lengthwise axis. Coaxial position of bottom plunger pump is ensured by rod adapter, S-shape rod or asymmetric tube adapter. Bottom plunger pump rod features shaped cross-section. Standard drive used to actuate two plunger pumps.
EFFECT: higher reliability and increased mean time between repairs.
10 cl, 5 dwg
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