An oil pump preventing piston oil leakage

Abstract

The invention discloses an oil pump preventing piston oil leakage, belonging to the technical field of oil pump equipment, which comprises an oil pipe, a support joint, a pump barrel, a plunger and a valve rod; the end of the support joint is connected with the oil pipe; the support mandrel is coaxially arranged inside the support joint; the valve rod is penetratingly arranged in the support mandrel; the lower end of the valve rod is connected with the upper end of the plunger; the upper end of the pump barrel is connected with the lower end of the support joint; the plunger is arranged in the pump barrel in a sliding manner up and down; a leak-proof assembly is arranged between the plunger and the pump barrel; the leak-proof assembly is used for preventing oil from leaking from the outer wall of the plunger and the inner wall of the pump barrel. The invention solves the problem of piston oil leakage of the oil pump in the prior art.