Pump Device

Abstract

A pump device includes a pulsator as a drive element for a main pump head which is situated in a delivery line and the working chamber of which is provided with a suction-side non-return valve and a pressure-side non-return valve. The working chamber of the pulsator is connected via an oscillation line, which is filled with delivery medium, to the working chamber of the main pump head in such a way that the pulsator sucks delivery medium out of the delivery line and into the working chamber of the main pump head, or presses delivery medium out of the working chamber, in an oscillating fashion. A ventilation valve is provided for ventilating the working chamber of the pulsator, and the ventilation line is a time-controlled valve and/or a pressure-controlled double-seat valve. A device may be provided for introducing a liquid into the working chamber of the pulsator and/or the oscillation line.

1 . A pump device comprising a pulsator as a drive element for a main pump head which is located in a delivery line, the working chamber thereof including a suction-side non-return valve and a pressure-side non-return valve, the working chamber of the pulsator being connected, via a transfer line filled with fluid to be delivered, to the working chamber of the main pump head such that the pulsator one of sucks fluid to be delivered in an oscillating manner from the delivery line into the working chamber of the main pump head and forces said fluid to be delivered out of the working chamber, a venting valve being provided for ventilating the working chamber of the pulsator, wherein the venting valve is one of a time-controlled valve and a pressure-controlled double-seat valve, and wherein a device is provided for introducing a fluid into the working chamber of at least one of the pulsator and the transfer line. 
     
     
         2 . The pump device as claimed in  claim 1 , wherein the working chamber of the pulsator is connected via a further venting valve to the suction side of the delivery line. 
     
     
         3 . The pump device as claimed in  claim 1 , wherein the working chamber of the pulsator is connected via a further venting valve to the pressure side of the delivery line. 
     
     
         4 . The pump device as claimed in  claim 1 , wherein the working chamber of the pulsator is connected via a further venting valve to a refill reservoir for compensating for leakage losses in the working chamber of at least one of the pulsator and the transfer line. 
     
     
         5 . The pump device as claimed in  claim 1 , wherein the working chamber of the pulsator is connected via a further venting valve to a collection container for collecting and subsequently returning fluid to be delivered produced during ventilation. 
     
     
         6 . The pump device as claimed in  claim 1 , wherein the pump device has a refill reservoir for refilling fluid to be delivered, which is acted upon by a pressure which substantially corresponds to the system pressure. 
     
     
         7 . The pump device as claimed in  claim 1 , wherein the transfer line is provided with a cooling system. 
     
     
         8 . The pump device as claimed in  claim 1 , wherein the pulsator is arranged above the main pump head. 
     
     
         9 . The pump device as claimed in  claim 1 , wherein the transfer line in at least one portion is subdivided into at least two parallel subsections. 
     
     
         10 . The pump device as claimed in  claim 9 , wherein the volume of the subsections of the transfer line extending parallel and/or the volume of the transfer lines extending parallel is respectively at least as great as the swept volume of the pulsator. 
     
     
         11 . The pump device as claimed in  claim 9 , further comprising control valves are provided for at least partially opening and closing the subsections of the transfer line or the parallel transfer lines. 
     
     
         12 . The pump device as claimed in  claim 1 , wherein the main pump head has at least two suction-side non-return valves arranged in parallel. 
     
     
         13 . The pump device as claimed in  claim 12 , wherein the cross section of the line receiving the suction-side non-return valve which is downstream relative to the direction of flow during the compression phase, is greater than the cross section of the line receiving the other suction-side non-return valve. 
     
     
         14 . The pump device as claimed in  claim 1 , further comprising a separating piston arranged in the transfer line. 
     
     
         15 . The pump device as claimed in one of the preceding  claim 1 , wherein the pulsator is a dual-acting pulsator, the device further comprising two pump circuits controlled in opposing directions. 
     
     
         16 . The pump device as claimed in  claim 1 , wherein the pulsator is configured as a dual-acting pulsator, one side thereof being configured as a drive element for the main pump head, and the other side thereof being acted upon by a pressure which substantially corresponds to the system pressure. 
     
     
         17 . The pump device as claimed in  claim 1 , wherein the pulsator is designed to have a diaphragm or tubular diaphragm. 
     
     
         18 . The pump device as claimed in  claim 1 , wherein the pulsator is designed to have a piston or plunger.