SU558187A1 - Device for measuring variable force of gas flow - Google Patents

Description

one

The invention relates to the field of the measuring technique and can be used to measure the variable pressure force of a moving gas.

Devices are known for measuring the variable force of a gas flow, comprising a receiving pipe and a pressure-sensitive element dividing it into two cavities, one of which communicates directly with the receiving channel and the other through an annular gap formed by the wall of the tube and the sleeve with radial holes.

A disadvantage of the known devices for measuring a variable pressure force of a gas stream is the small linear amplitude-frequency range of operation.

To expand the amplitude-frequency range in the proposed device, the tube entrance is blocked with a plug with neutral and peripheral receiving channels, the first of which goes into the cavity in front of the sensing element, equipped with a reflecting disk with perimeter holes, and the second into the annular groove of the outer surface of the plug communicating through the radial holes in the sleeve with an annular throttling gap.

FIG. 1 shows the proposed device, side view; in fig. 2 same view by

arrow a pas fig. one; in fig. 3 is the same; the section along BB in FIG. one.

The device is a receiving tube 1, into which the entrance is blocked by a stopper 2c with an annular groove 3 on the outer surface. Behind the plug 2 in the receiving tube there is a cavity 4, which is directly connected through the central conduit 5 to the gas flow. Non-peripheral channel 6 enters an annular point 3, which communicates through an annular throttling gap 8 formed by bushing 7 and tube wall 1 with cavity 9 (receiver) of the receiving tube by means of radial holes 10. The cavity 4 is equipped with a reflecting disk 11 with holes 12 but to the perimeter that protects the pressure-sensitive element from collision with foreign particles of the gas stream.

Element 13 is fixed inside the receiving tube 1; it divides it into two cavities 4 and 9. The receiving tube at the outlet is closed by a cover 14, through which electrical communications 15 pass from the sensor.

The device works as follows. The variable pressure force of the gas stream, perceived by the central receiver channel 5, is transmitted through the cavity 4 and the holes 12 in the reflector disk 11 directly on

pressure-sensitive element 13. At the same time, the pressure force is sensed by the peripheral channel 6 and, the passage through the annular groove 3, the radial holes 10, the annular throttling gap 8, falls into the cavity 9 behind the element 13. In this case, the averaged pressure force is provided in the cavity 9, t that is, the variable force force is eliminated. Element 13 perceives only the variable component of the pressure force of the gas flow and, via electro-coupling unit 15, transmits the passwords to the measuring device.

Claims (1)

 Invention Formula A device for measuring a non-temporal pressure force of a gas stream comprising Primary tube and a pressure-sensitive element dividing it into two polos, one of which communicates directly with the receiving channel and the other through an annular throttling gap formed by the wall of the tube and the sleeve with radial holes, characterized in that the purpose of expanding the amplitude-frequency dianazone, the tube entrance is blocked by a tube with a central and peripheral tube channels, the first of which goes into the cavity in front of the sensing element, equipped with a reflecting disk with holes along the perimeter and the second to the circular point on the upper side of the plug, communicating through the radial holes in the sleeve with the annular throttling gap. /four and. one Bud A fui.2 B - B rig.Z