摘要:
Variable displacement-type oil pump has pump configuration unit driven by engine and discharging oil sucked from inlet portion from outlet portion by volumes of a plurality of pump chambers being varied; cam ring changing volume variation of each pump chamber by moving; coil spring forcing cam ring in direction in which volume variation of each pump chamber is increased; control oil chamber forcing cam ring in direction in which volume variation of each pump chamber is decreased; drain port draining oil from control oil chamber; control valve into which a downstream side oil discharged from outlet portion is introduced, and which adjusts internal pressure of control oil chamber by supplying oil into control oil chamber when hydraulic pressure of the introduced oil exceeds a predetermined setting working pressure. With this configuration, it is possible to suppress increase in electric power consumption associated with an electrical control mechanism.
摘要:
The present invention relates to a dual pump system which is capable of bypassing a portion of oil, when the oil supplied to an engine excessively increases in supply pressure, to always maintain an adequate oil supply pressure at each portion of the engine. The dual pump system according to the present invention includes: a dual pump provided with a plurality of chambers independent from each other, wherein an input and an output port are provided in each of the chambers; a plurality of output lines connected to the output ports of the plurality of chambers, respectively; and a switching valve that is provided in an output line of one side of the plurality of output lines, enables a fluid to flow to the output line when operating in one direction, and enables the fluid to be drained to an oil pan through a bypass line branched from the output line when operating in the other direction.
摘要:
A fluid pump of the present invention includes a housing (H), a rotary shaft (30), and pump units (70, 80) which are contained in the housing and sucks in , pressurizes, and discharges fluid with being rotationally driven by the rotary shaft. The housing has a suction passage (14b) conducting the fluid from a suction port (14a) to the pump unit, a discharge passage (15a) conducting the fluid from the pump unit to a discharge port (15b) , a return passage (16c) returning a portion of the fluid flowing through the discharge passage to an upstream side of the pump unit, and a control valve (90) controlling a flow of the returned fluid. The return passage (16c) is formed so as to conduct the returned fluid in the same direction as a flow of a sucked fluid flowing through the suction passage (14b) to make the returned fluid flow together with the sucked fluid. As a result, pump efficiency can be improved while preventing a disorder of the flow, flow loss and the like.
摘要:
Die Erfindung betrifft eine Exzenterschneckenpumpe (1,30) zur Förderung von Fluiden und / oder körnigen Medien (M). Der Pumpenkörper (3) der Exzenterschneckenpumpe (1,30) umfasst einen Einlassbereich (4), eine Pumpeinheit (5) und einen Auslassbereich (6). Dem Einlassbereich (4) ist eine Antriebseinheit (12) zugeordnet. Die Pumpeinheit (5) besteht aus einem Rotor (8) und einem Stator (7), wobei sich der Rotor (8) exzentrisch im Stator (7) bewegt. Der Einlassbereich (4) bildet die Saugseite (S) und der Auslassbereich (6) die Druckseite (D) der Exzenterschneckenpumpe (1,30). Der Exzenterschneckenpumpe (1,30) ist eine Bypass-Verbindung (2) mit mindestens einem Sicherheitsventil (20,40) zugeordnet, zur Aufnahme und Rückleitung von rückströmendem Medium zwischen der Druckseite (D) und der Saugseite (S) der Exzenterschneckenpumpe (1,30). Erfindungsgemäß sind die Bypass-Verbindung (2) und das Sicherheitsventil (20,40) in den Pumpenkörper (3) der Exzenterschneckenpumpe (1,30) integriert.