EP 0200294 A2 19861105 - Balanced roller vane pump having reduced pressure pulses.
Title (en)
Balanced roller vane pump having reduced pressure pulses.
Title (de)
Ausgleichsrollenschieberpumpe mit Druckspitzenreduzierung.
Title (fr)
Pompe équilibrée à palettes cylindriques ayant des impulsions de pression réduites.
Publication
Application
Priority
US 70545285 A 19850225
Abstract (en)
A balanced rotary pump is disclosed of the type including a pumping element (17) having a rotor member (25) defining a plurality of slots (27). Each of the slots receives a radially displaceable roller vane member (29). The pumping chamber is defined by a pair of inlet arc surfaces and a pair of discharge arc surfaces (65) of progressively decreasing radius. Each of the slots (27) includes a driving surface (73), each of which includes a substantial surface portion (77) or ended at a negative angle relative to a radial line. The engagement of each of the roller vane members (29) and its respective negative surface portion (77) is effective to act to reduce slightly the net radially outward force acting on the roller vane member, to reduce bouncing thereof as the roller vane member passes from the inlet arc surface to the discharge arc surface. The result is improved engagement of the roller vane member and the adjacent cam surface, reduced leakage past the vane member, and a reduction in pressure pulses and noise.
IPC 1-7
IPC 8 full level
F04C 2/30 (2006.01); F04C 2/344 (2006.01)
CPC (source: EP KR)
F04C 2/3447 (2013.01 - EP); F04D 29/66 (2013.01 - KR)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0200294 A2 19861105; EP 0200294 A3 19870805; EP 0200294 B1 19900110; DE 3668221 D1 19900215; JP S61252886 A 19861110; KR 860006638 A 19860913; KR 940006865 B1 19940728
DOCDB simple family (application)
EP 86300936 A 19860212; DE 3668221 T 19860212; JP 4011986 A 19860225; KR 860001248 A 19860222