RU2029U1 - TACHOMETER FLOW METER - Google Patents

Abstract

1. TACHOMETER FLOW METER, comprising a housing with a non-contact signal pick-up unit fixed to it, with an internal flow channel having a nozzle inlet at the inlet and an exit restrictor rod, and a hollow rotor freely positioned between the nozzle and the limiter, consisting of two fastened in the diametrical plane hemispheres, with a through diameter hole in the form of a tube on which ring magnets are mounted, characterized in that the outer surface of the ring magnet is crimped by a retaining ring or articulated olusferami.2. The flow meter according to claim 1, characterized in that the hemispheres of the rotor are articulated on the outer surface of the retaining ring.

Description

Tachometer flowmeter

The inventive utility model - Tachometric flow rate) refers to the measuring technique and can be used to measure the flow of liquid and gas in closed puffed pipelines in the power industry, utilities and other sectors.

This utility model is a constructive solution of a flow sensor with a levitating rotor 1-3.

One of the first sensors with a levitating rotor is a ball flow meter, consisting of a housing in which a ball rotor is located, magnetized along the (diametric hole, and mounted on the housing of the induction transducer connected to the measuring unit 4.

The main unit of the specified flowmeter sensor is a ball rotor, the design of which largely determines the accuracy of the measurement, as well as the reliability and durability of the whole device 5-8.

Known tachometric flow meter comprising a housing with a contactless signal pickup unit and a flow channel having a nozzle at the input and a stop bar at the exit, and a magnetized ball rotor freely located between the nozzle and the stop bar and with a through diameter hole 9.

When the flowmeter is operating, the ball rotor is hydrodynamically weighed and acquires a rotational flow proportional to the measured flow rate (fedol.

IPC GOIF 1/10

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The disadvantage of such flowmeters is the inferior value of the minimum flow rate, which is due to the large moment of inertia of the rotor.

To reduce the moment of inertia of the rotor, its mass is reduced using the rotor in the form of a hollow ball.

Known tachometric flowmeter comprising a housing with a non-contact signal pick-up unit sealed on it, with an internal flow channel having a nozzle narrowing at the input and a standard restrictor at the output, and a hollow rotor freely consisting between two nozzles and a limiter (fixed in diametric hemispherical planes, with a (bottom hole in the form of a tube on which ring magnets 10 are fixed.

The disadvantage of this design of the flow meter is the brittle destruction of ring magnets under the action of dynamic loads, which reduces the life of the device.

The main objective of the claimed utility model is to increase the life of the flowmeter by preventing brittle destruction of magnets.

The task solution is ensured by the fact that the external surface of the ring magnet is crimped by a retaining ring.

In addition, the articulation of the rotor hemispheres along the external surface of the retaining ring or the outer surface of the annular magnet provides centering of the hemispheres in three planes, which stabilizes the rotation of the rotor, increasing the life of its operation and the device as a whole.

Figure 1 presents a structural diagram. the proposed flow meter, in which on the outer surface of the annular magnet a retaining ring is installed.

-ifHa Fig. 3 shows the design of a hollow rotor, in which hemispheres are articulated on the outer surface of the magnet.

The tachometric flowmeter sensor has a housing 1, in which a nozzle 2 is installed at the inlet of the flow channel, and a limiter rod 3 at the output. A signal pickup unit 4 is fixed to the housing 1. A rotor 5 is located in the flow channel between the nozzle 2 and the limiter rod 3, consisting of from hemispheres 6 and 7, in the cavities of which on the CEZose tube forming a diametrical hole 8, a ring magnet 9 is installed, crimped over the extruded surface by a retaining ring 10 (FIG. 1) or by rings b and 7 (FIG. 3), and the outer surface of the retaining ring 10 hemisphere compressed and 6 and 7 (Figure 2).

The flow meter operates as follows. When the working jaundice flows through the flow channel, the spherical rotor 5 of the hydrode is dynamically weakened and begins to rotate around an axis perpendicular to the axis of the borehole 8 and the axis of the flow channel. Moreover, the rotational speed of the rotor 5 is proportional

medium flow rate. The rotor 5 rotational speed is registered by the signal pickup unit 4. A measuring unit (not shown) converts the signal from the pickup unit 4 into quantitative flow rates.

Compression of the annular magnet 9 by the retaining ring 10 or hemispheres 6 and 7 prevents brittle fracture of the annular magnet 9 under dynamic stresses, which increases the life of the device. And the joint on the outer surface of the retaining ring 10 of the hemispheres 6 and 7 additionally increases the resistance of the ring magnet to brittle fracture, furthermore, the hemispheres are centered in three planes and the rotor rotation is stabilized, which also increases the life of the device.

Claims (2)

1. TACHOMETER FLOW METER, comprising a housing with a non-contact signal pick-up unit fixed to it, with an internal flow channel having a nozzle inlet at the inlet and an exit restrictor rod, and a hollow rotor freely positioned between the nozzle and the limiter, consisting of two fastened in the diametrical plane hemispheres, with a through diameter hole in the form of a tube on which ring magnets are mounted, characterized in that the outer surface of the ring magnet is crimped by a retaining ring or articulated olusferami.  2. The flow meter according to claim 1, characterized in that the hemispheres of the rotor are articulated on the outer surface of the retaining ring.