JPS5724824A - Volumetric flow meter - Google Patents

Abstract

PURPOSE:To simplify, miniaturize, and lighten a device, by a method wherein a meter is constituted such that a plural number of vanes are pivotably mounted at a main shaft positioned between an upper and a lower walls of a cylindrical case having an inlet port and an outlet port for fluid, and a distance between the upper and the lower wall increases gradually in the rotation direction. CONSTITUTION:An inner surface of a lower wall 4b of a case 4 forming a space room 5 having a circular section is plane, and an inner surface of an upper wall 4a is designed to be uneven such that a size in a perpendicular direction increases and decreases gradually. Four vanes 7a-7d are rotatably mounted in a radial manner at a main shaft 6. When fluid flows through an inlet port 4e, a van 7b rises up and a vane a lies down, and thereby vanes 7 rotate in a direction of an arrow mark. The vanes 7 turn passing through a position shown in a dotted line, and air at a part, where two vanes of the vanes 7b and 7c make perpendicular contact with the upper and the lower wall, is exhausted through an outlet port 4f. Fluid, which is 4 times as much as the measure 8 of the part, flow out during one rotation of the vanes 4. A fluid capacity can be counted from the number of revolutions of the main shaft 6. This permits simplifying, miniaturizing, and lightening of the device.