SU613204A2 - Rate-of-flow meter - Google Patents

Description

a slyral

wing wing with polar radius

one

R . -

 Y t

where f is the polar angle, rad.

The pole of the wing rocking axis serves as the pole of the polar coordinate system. Wing 2 is mechanically connected with gauge 3, which converts the angle of rotation of the wing into an analog signal Rv). Equal balancers 4 are attached to the same axis as wing 2 to compensate for the torque generated by the wing due to the deviation of its flow profile from the circumference. The axis of swing of the wing is connected to one end of the spring 5, the second end of which is rigidly fixed.

The flow meter works as follows.

The action of the dynamic pressure of the wing 2 deviates by the angle at which the dynamic pressure of the medium is compounded by the twisting moment created by the spring 5. Since the flow profile of the snout is filled in the form of, the radius of which is inversely proportional to the square root of

polar angle, the rotation angle of the sensitive element is directly proportional to the velocity (flow) of flow Q.

Gauge 3 measures the angle of rotation of the snout 2 and outputs it as a pneumatic signal Pv1 to the recorder or control system. The use of a sensitive element of the proposed form in a flow meter increases the accuracy of measurement and allows an increase in the accuracy of control and adjustment of process parameters. As a result, productivity is increased and raw materials are saved.

F o rm u l a i – i 3 o b.

Flow meter lo a.vt. St. No. 351083, characterized in that, in order to improve the measurement accuracy, the flow profile of the rotating sensing element is implemented in the form of a spiral, the polar radius of which is taken to be

one

p CT

;

where f is the polar angle, rad.

Reyh.