METHOD OF MANUFACTURING HEAT-SENSING ELEMENT OF HEAT FLOW SENSOR WITH TRANSVERSE TEMPERATURE GRADIENT AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2024 - IPC G01K17/20 

FIELD: heat engineering.

SUBSTANCE: invention can be used in making heat flow sensors. Disclosed is a method for manufacturing a heat-sensing element of a heat flux sensor with a transverse temperature gradient, which includes making a disc from one thermocouple alloy, forming a ball at the end of an electrode wire from another thermocouple alloy by melting and welding it to the disc by passing an electric pulse. At that, ball is preliminarily formed on electrode wire by laser pulse in medium of process gas, note here that laser pulse optical axis is oriented perpendicular to electrode wire axis and crossed therewith. Further, the ball is placed on the surface of the disc in its center, while the longitudinal axis of the wire with the ball is oriented perpendicular to the surface of the disc. Further, pressing the ball to the surface of the disc and applying to the ball a deforming force directed to the disc along the axis of the wire, the ball is symmetrically deformed to produce a body of rotation, the axis of which coincides with the longitudinal axis of the wire, after which an electric pulse is passed through the body of rotation and the disc. Body of revolution and the disc are fused at the point of their contact spot, having the shape of a circle, the center of which coincides with the center of the disc, and they are welded to each other in the medium of the process gas, after which deforming force is removed. Also disclosed is a device for making said sensor, which includes an adjustable electric power supply, a switch, a device for applying pressure during welding, a movable electrode and a fixed electrode. Working welding zone is equipped with devices for supply of process gas, and movable electrode is made of refractory metal and is equipped with through profiled channel. At that, on the movable electrode working end there is an electrically insulating gasket, and the fixed electrode is made of copper and is equipped with a channel for supplying process gas to the reverse side of the disc of the heat-absorbing element.

EFFECT: high accuracy of the heat flow sensor and simplification of the process.

5 cl, 4 dwg