SU1242830A1 - Transducer of flow velocity - Google Patents

Abstract

The invention relates to hydrodynamic studies and reduces the measurement error of the horizontal flow velocity. In the housing 1 on the hinge 4 is mounted a rod 3 with a spherical receiving element 2 at one end. The second end is made in the form of a cam 5, with the spherical surface of the pusher 6 mated with the spherical end face, moving the axis of the spring element 7 when the medium flows on the element 2. The angular movement of the hinge 4 under the action of the horizontal component of the flow deforms the ring of the spring element 7, which leads to unbalance of the strain gauge bridge 8 and the change in output signal proportional to the flow velocity. The radius of the sphere of the end face of the pusher 6 is at a great distance from the point of conjugation of the cam 5 with the plunger 6 to the center of rotation of the hinge 4. 1 Il. g (L

Description

The invention relates to a technique for hydrodynamic research and can be used to measure the flow rate of a liquid or gas.

The purpose of the invention is to reduce the measurement error of the horizontal flow rate.

The drawing shows the design of a fluid or gas flow velocity sensor.

The proposed sensor contains a sealed housing 1, in the lower part of which there is a spherical receiving element 2 mounted on a rod 3 mounted on a hinge 4 (in the form of a stud), the end face of a rod 3 made in the form of a cam 5 having a spherical surface is coupled with a spherical the end of the pusher 6, which serves to transfer the movement to the spring element 7, made in the form of a spring ring with strain gages 8 glued on it, an adjusting unit 9 and a cable 10.

At the same time, the radius of the sphere of the end face of the pusher 6 is made a great distance from the interface point of the cam 5 with the pusher 6 to the center of rotation of the hinge 4.

 The flow velocity sensor works as follows.

The flow of liquid or gas acting on the spherical element 2 causes the cam 5 of the support 4 to deviate from the vertical. As a result, the spherical shaft pusher 6 moves the axis of the spring element 7. At the same time, the movement of the capstan prevents the movement of the vertical component of the flow rate that she st

Editor A.Shishkin Order 3697/42

The compiler. V.Nazarova

Tehred O.Sopko Proofreader M.Sharoigy

Circulation 778, Subscription VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Raushsk nab, 4/5

Production and printing company, Uzhgorod, Projecto st., 4

spring with a force exceeding the force from the velocity head of the vertical components of the horizontal flow.

Moreover, the horizontal components of the flow cause an angular displacement of the spike bearing according to the sine law. This displacement deforms the (ring) spring element 7, which unbalances the resistance strain bridge and, consequently, will occur, provided that the bridge circuit of the transformer element is supplied with direct current, the change in the output signal is proportional to the speed of the measured flux.

Invention Formula

A flow velocity sensor, comprising a housing, a rod mounted therein on a hinge, at one end of which a spherical receiving element is fixed, the other end is connected through

A mechanical displacement transducer with an elastic element carrying glued resistance strain gages, is designed so that, in order to reduce the measurement error of the horizontal flow velocity, the mechanical displacement transducer is made in the form of a pair of cam-pusher coupled to each other by spherical surfaces, in this case, the pusher is connected to the elastic end by the second end, and the rigid cam is connected to the opposite end of the rod carrying the receiving element, and the radius of the sphere of the end of the pusher is greater than From the cam pusher to the center of rotation of the hinge.

Claims (1)

Claim 20 A flow velocity sensor comprising a housing, a rod mounted on it on a hinge, at one end of which a spherical receiving element is fixed, the other end is connected through 25 a mechanical displacement transducer with an elastic element carrying glued strain gages, which In order to reduce the measurement error of the horizontal flow rate, the mechanical displacement transducer is made in the form of a cam – pusher pair, interconnected by spherical surfaces, the pusher being the second the core is connected to the elastic element, and the cam is rigidly connected to the opposite end of the rod supporting the receiving element, and the radius of the sphere of the end face of the pusher 40 is greater than the distance from the point of contact of the cam with the pusher to the center of rotation of the hinge. Compiled by V. Nazarov