Pump means.

摘要

Pump means for pumping a multi-phase flow consisting of a mixture of gas, liquid and finely-divided solid material with a variable mutual ratio of mixture. The pump means primarily comprises a pump housing (1) with an enclosed rotating drum (4). In the end walls (2,3) of the pump housing (1) there are arranged connection openings (15,16,21,22) for the supply and discharge of a driving fluid and a pump flow, respectively. The drum (4) comprises several cylinder spaces (5,6) arranged in axially aligned pairs with all the pairs concentrically arranged inside the envelope surface of the drum (4). The cylinder spaces (5,6) of each pair are separated by means of a partition (12). In the cylinder spaces (5,6) of each there are arranged a drive piston (7) and a pump piston (8) interconnected by a piston rod (9) passing in a sealed manner through the partition (12). During the rotation of the drum (4), a driving fluid is supplied to one side of the driving side and acts on the drive piston (7) connected to the pump piston (8), whereby a pump flow is pressed out with the pump piston (8) from one side of the pump side whereas driving fluid from the other side of the driving side is discharged and pump flow is supplied to the cylinder space on the other side of the pump side. With this type of pump means a pump is obtained which comprises few movable parts and which, in spite of the fact othat it is relatively slow moving, has a high pump capacity.