SUMMING INDUCTIVE FUEL FLOW METER Russian patent published in 2023 - IPC G01F1/75 

FIELD: instrumentation.

SUBSTANCE: used to measure volumetric fuel consumption during the operation of industrial and transport machines. The summing inductive fuel flow meter contains a pointer with a scale and arrow, a gear rack, an instantaneous fuel consumption sensor, a gearbox, a ratchet, an inductive sensor made on a bridge circuit, the first and second arms of which are formed by the secondary windings of the transformer, the third arm is formed by the winding of a constant inductance coil, and the fourth arm is a winding of a variable inductance coil, and a pulse converter containing a bridge rectifier connected to the output of the bridge circuit of the inductive sensor, and a pulse amplifier, the input of which is connected to the output of the bridge rectifier, and the output to the control winding of a stepper electromagnet, the armature of which is connected to the ratchet pawl, the ratchet gear shaft of which is articulated with the input shaft of the gearbox, on the output shaft of which an indicator arrow is mounted. In this case, the instantaneous fuel consumption sensor contains a housing made of non-ferromagnetic material in the form of a hollow flange with the possibility of installation in a pipeline gap between the pipeline flanges and having internal and external annular recesses, while in the outer annular recess a ferromagnetic core with a variable inductance coil winding is installed, covered with a lid, and the inner annular recess is made with inlet and outlet bells; in the inner annular recess, an annular-shaped turbine with internal blades is installed in the inner annular recess using angular contact bearings, with internal blades evenly distributed on the inner surface of the turbine support ring at an acute angle to the direction of movement of the flow of fuel pumped through the pipeline, and external teeth, evenly distributed on the outer surface of the turbine support ring, while the external teeth are made of ferromagnetic material, and the end sections of the internal blades are beveled and repeat the shape of the inlet and outlet bells of the internal annular recess, while the internal diameter of the internal blades is made equal to the internal diameter of the pipeline, into the gap of which the housing of the instantaneous fuel consumption sensor is installed. The external teeth are made of electrical steel.

EFFECT: simplifying the design and manufacturing method of the instantaneous fuel consumption sensor and increasing the reliability of the fuel flow meter.

2 cl, 3 dwg