SU1051379A1 - Tachometric ball flowmeter - Google Patents

Description

1 and Orgt from i-ioci-: g cji to ripnGopos; pf: -: -i; oj 5 imeno K device deputy njiH i -;,; ii.iep8H;, - iH consumption of H1idkost --and I:, f; ec / riib: tachomimerical lff1-1klye rskhodomyr, content with cycChdric flowwrap; and coaxially mounted into the sleeve, the KOTopbie form a 1-ewheel - (in a vortex chamber with an annular slot for air and flow, sensing ;; yy element in the form of luapa, propeller blade; -:; pnTe.: ii, flow, udznovlei -NEW 3 PTiXOul-iO-l Parts, and Y:; ::; remove sigm.pe I. I. 7HsBRCTHbic flowmeters have a cod Hi / iT3jTji-ic low rf 1 and a narrow diapEzo: -: with j Hi-; -U: Ofi the characteristic of Krone addition, the design | Di swirler character;: p-: is due to the complex technology / i 3g o 3 o e i, Known tayume tachhometrically iuap-i (ov11Yu flown. distinction by the fact that the oltsev vortex neprot The internal chamber is located behind the turbulence in the direction of the motion of the flow, and the annular gap is oriented towards the entrance of the flow G 2 7 j.iKdH 1 tonotructure is characterized by low accuracy due to arising - effort; pressing sensation;,:.:; The panel of the camera i.; -.; -;:; S close to K, the offer of the 1y is an axial ball flow meter, comprising a housing with an cylinder: a flow-through anel and a RING nonprocessor; a vortex chamber; B which is free razmvUdvn sensitive element in the form of sharE; coax; a sleeve mounted on the canal AND cantileverly secured in front of the whirlwind cam. with a zihritel on its back end is formed of an annular ring with the housing behind the swirl chamber. together with a vortex chamber with the npoTO4HbfM channel, and a node for removal of 5 GN; And the bushing is made with an annular channel that communicates the cavity of the inlet nozzle with a vortex 3j. In the indicated flow meter, a part of the controlled flow enters the annular channel to the swirl. And the other (main) asg flow is free. A swirling mine passes through the central channel. The flow in a narrow annular channel is not self-similar over the entire range of measurable flow rates, which leads to a narrow diabase (; the characteristic is also significant; the flow meter also has a significant additional error in the change in viscosity H3i - ep eMOs-i) "(The spruce of the invention - improving the accuracy and expanding the range of measurable targets is achieved by the fact that in a tachometric ball flow meter, comprising a housing with a cylindrical flow channel and an annular non-flowing vortex canister; The sensitive element in the form of a ball, coaxially mounted in the channel and Kong, is placed: it can be fixed in front of the vortex chamber with a coil on its rear face, forming behind a vortex can; ---- an annular slot with a body, a common (1 vatzuyu vortex chamber with a protog ... Г: KabianoMj and signal pickup unit; housing behind the annular gap. Additional ring B1 / CG, | L camera, open to the sides.-I,: ;; side walls and end walls of the HD seamlessly conjugate, with the upper end wall of the additional chamber located in the same plane with the end of the sleeve on where the cantilever blades are located, and is at a distance from the upper one, exceeding the length of the cantilevered vanes, and has an orifice diameter smaller than the diameter of the flow channel of the housing, the end wall of the additional annular chamber is removed from the upper one by the distance the distance by the lower and upper ends of the additional chamber; g. | maximum diameter additional camera; the diameter of the inlet of the additional chamber; in this case, the ratio of the diameter of the inlet to the diameter of the exit hair of the additional ring and the green chamber was selected within the limits of 7-h2. On f and g. 1 p p u c t in a l and p and with the course of p. the parental section; Fig, 2 - section -A in Fig.1. The flow meter includes a housing 1 with andndree; 1m npoTo JHfcii-i h-a-; scar.

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the sleeve 2 installed therein is coaxial with a through smoothly tapering channel, for example, in the form of a nozzle. The sleeve 2 is attached to the housing 1 console. Between the housing 1 and the sleeve 2 there is an annular vortex rotary chamber 3 in which the ball 4 is placed. In the output part of the housing 1 there is an additional vortex - open on the side of the axis, chamber 5 having an inlet diameter of czl0 (and outlet diameter of 0 1 holes in end walls, separated from the annular vortex non-flowing chamber 3 by an annular protrusion 6 and communicating with it through the annular slot 7. At the output rear end of the sleeve 2 there is a swirler 8 made of cantilever blades mounted around the circumference od angle to the radial direction so that the blades are formed between adjacent kanalGE. The free ends of swirler blades positioned in the upper (downstream) part of the additional vortex chamber. The outer wall of the housing 1 is mounted the pickup assembly 10.

9 . four

The flow meter works as follows.

With the passage of fluid through the narrowing channel of the sleeve 2 speed

align it in front of the swirler with the diameter. Under the influence of the jet formed by the swirl in the additional vortex chamber 5, stable toroidal vortices are formed.

with a high degree of tybbulntni and in the annular region close to the body, a part of the flow is twisted around the axis of the flow meter, which is facilitated by the reverse ejection of fluid near the annular gap 7 through the channels 9 between the blades. The flow rotating in the additional vortex chamber 5 causes the fluid in the annular vortex flow chamber 3 to rotate through the annular gap 7, and the fluid, in turn, is a ball whose rotation frequency is widely proportional to the flow rate

fluid and is determined by the node 10 signal removal.

The proposed flow meter is recommended for use in nuclear power plants.

Claims (2)

. 1. A TACHOMETRIC BALL FLOW METER, comprising a housing with a cylindrical flow channel and an annular non-flow swirl chamber, in which a sensing element in the form of a ball is freely placed, coaxially mounted in the channel and a sleeve with a swirl cantilever mounted in front of the swirl chamber, forming behind the swirl chamber an annular slit with a housing, a vortex chamber communicating with a flow channel, and a signal pickup unit, characterized in that, in order to increase accuracy and expand the measurement range, behind the annular gap an additional annular vortex is made. a chamber open from the ori side, the side and end walls of which are smoothly conjugated, while the upper end wall of the additional chamber is located in the same plane as the end of the sleeve on which the cantilever blades of the swirl are located, and the lower one at a distance from the upper? exceeding the length of the cantilever blades, and has a hole diameter smaller than the diameter of the flow channel of the housing. 2. The device according to claim 1, with the fact that the lower end wall of the additional annular vortex chamber is removed from the upper one by a distance determined by the relation To In / where h is the distance between the lower and upper ends of the additional camera; maximum diameter of the additional chamber; dg _X ~ the diameter of the inlet of the additional chamber, while the ratio of the diameter of the inlet SU „1051379 holes to the diameter of the outlet of the additional annular vortex chamber is selected in the range of 0.7-1, -2. > ί 2 acquisition relates to instrumentation, namely to devices for measuring fluid flow.