FIELD: engines and pumps.
SUBSTANCE: invention relates to couplers of pump rods for screw pump drive. Said coupler comprises captive nut with inner ledge on one side and internal thread on opposite side, rod body, captive nut and locating nut. Rod body has external thread, wedge-like slit and wedge-like ledge at opposite end. Note here that captive nut and guide captive sleeve are fitted on the rod of wedge-like ledge, locating nut being fitted on the body to contact with its inner ledge. Wedge-like ledge can be arranged in wedge-like slot of adjacent rod at its coupling with the guide captive sleeve.
EFFECT: higher torsion strength and breaking point.
5 cl, 2 dwg
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