FIELD: engines and pumps.
SUBSTANCE: proposed unit consists of two different-diametre rod pumps, top pump lateral intake valve arranged at pump bottom face part, parker separating formations wherein unit branch pipe passes. Top pump delivery assembly represents housing with diametre smaller than that of plunger and hollow connecting rod screwed in bottom end face and linked with bottom pump plunger. Crosswise cylindrical channel is made above rod end face to communicate delivery valve with aforesaid pump lateral intake valve arranged on the joint between top and bottom pumps cylinders. Hollow connecting rod space communicates with top plunger above-valve chamber via space formed by crosswise cylindrical channel and cylindrical housing of top pump delivery assembly. Proposed unit allows independent oil extraction from both formations.
EFFECT: higher efficiency.
3 dwg
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