FIELD: fuel feed pumps for high-pressure fuel pumps.
SUBSTANCE: proposed gear pump has housing (18), two gears (14,16) arranged in this housing and thrown into relative engagement and at least one groove (22) made in pump housing on delivery side. Said groove has first section (24) which passes from delivery side; groove bottom (22) is located at distance (s) from points of gear teeth (20); second section (26) adjoins first section and bottom of groove (22) is located at distance (t) from tooth points; it exceeds distance (s) on first section. Angular and circumferential length (α) of first section is lesser than angular or circumferential length of second section; total angular velocity (α,β) of groove exceeds circular pitch of two teeth (20).
EFFECT: increased volumetric delivery; avoidance of cavitation damage at high rotational speed.
9 cl, 3 dwg
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