SU1193358A1 - Adjustable nozzle - Google Patents

Description

The invention relates to the field

valve industry.

The purpose of the invention is to expand the functionality by 'ensuring a smooth change in the parameters of the flow of 5 meters up to the complete overlap of the flow area.

The drawing shows an adjustable nozzle section.

In case 1 with channels through passage — Yulami, there is a locking element made in the form of a set of petals 2 and 3, obtained by sweeping a round hemisphere onto a lateral surface of a cylinder with a same base diameter of 15. Petals 2 and 3 are located along the inner side surface of the cylindrical body 1 by two annular rows fixed with bases on the body. Basis — 20

perception of petals of one row

shifted relative to the base of the petals of another row by half a step. Between the petals is placed a heating element 4 in the form of a flat 25 flexible plate connected to an energy source.

The material can be an alloy of nitinol, which changes its shape at a certain temperature difference. Petals can be made in the form of tightly-pressed and interconnected plates made of materials with different linear coefficients35

expansion * Petals in each of the adjacent rows are made with different curvature.

The operation of the device is as follows.

40

With the heater 4 turned off, the temperature of the hemispherical petals 2 and 3 does not exceed the ambient temperature. Petals 2 and 3 are therefore elongated along the walls of the cylindrical 45 of the weighty body 1 and repeat its outlines. The flow of the medium passing through the device freely passes through the cylindrical body 1. Fully opened petals 2 and 3 50

they do not create a sufficiently large resistance, flow, and the parameters of the latter, when passing through the device, have practically no changes. If it is necessary to carry out 55 • changes in the flow parameters, the heating element 4 is included in the circuit of the source of electrical energy, begins to heat up. Thus, the temperature of the petals 2 and 3 adjacent to the heating element 4 begins to increase due to heat transfer through the contacting surfaces. When reaching, for example, 40 ° C, the latter begin to smoothly change their shape and degree of curvature. The ends of these petals at the same time bend down, towards the longitudinal axis of symmetry of the device, moving away from the walls of the cylindrical body 1. The surface of these locking elements becomes convex and curvilinear. In a certain area near the base of the segments, they are partially joined along the side surface.

2 joints formed from petals, which are still short in length, on the reverse side relative to the direction of movement of the medium being passed · are sealed by the surfaces of petals 3 tightly pressed against them. the one that is present in petals 2 at a given time. Therefore, the petals 3 on these parts of the surface, as it were, are bent off by the petals 2, which tend to come to their desired position, and under the influence of m elastic forces, trying to return to its original position, pressed against the surface of the latter.

The passage of the medium passing through the device at the joints becomes impossible, and the flow area of the device decreases. Further output of the Medium flow is through the remaining between the petals 2 and 3 in areas where there is no coincidence of the side surfaces, gaps, as well as through the holes in the center with a broken outline. The flow parameters of the medium being passed in will keep the value running as long as the temperature reported to the petals 2 and 3 of the heater 4 is constant. If necessary, further changes in the flow parameters of the heater 4 is included in the chain ta'k so that the temperature of the petals 2 and 3 rises even higher.

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1193358

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The degree of curvature of the petals 2 and 3 increases even more, and the length of the overlapped joint at the petals 2 of the first locking row increases accordingly. Cross section of a broken hole through which and. The output of the transmitted medium is reduced. The flow parameters have correspondingly different values. Such adjustment of them becomes possible due to the fact that when the temperature of the appropriately treated petals 2 and 3 varies in the temperature range of 40–70 ° C (the use of nitinol ^ for the manufacture of alloy segments, their curvature gradually changes,

If it is necessary to completely close the aisle, the petals 2 and 3 are heated so that “the adjacent petals of the two locking rows begin to coincide completely along the entire length of the side surface, forming two volume- hemispheres (one of the first row petals, the second of the second petals). formed from the pigments of the first locking row, this presses on the hemisphere of the 2nd locking 'row, which has a slightly larger radius, which, deforming, provides additional overlap of the joints created in the first hemisphere due to zhatiya to them under the action of the forces of elasticity of the surface of the petals 3.

If necessary, the opening of the passage should reduce the temperature of ¹ petals 2 and 3, and thereby reduce their curvature, revealing the previously created joints between the elements of the first and second locking rows.

Thus, by adjusting the temperature of the petals 2 and 3 using heater 4, it is possible to provide

smooth change of flow parameters ’

medium passed through the device, as well as complete overlap of the device.

5 Similarly, the regulation of the flow parameters of the flow through medium by raising the temperature with the help of a heating element can be carried out and when using

, 0 in the device petals, each of which is made of metal plates with different coefficients of linear expansion. The petals 3 of the second locking row, installed with an offset relative to the petals 2 of the first row, in order to save the deficient alloy, nitinol can be made simply from a well-springy flexible material—

2o la. In this case, the function they perform - the compaction of the emerging joints between the petals 2 of the first locking row, remains unchanged. However, bending them and deviating

25 from the initial occupied position will no longer occur independently, but under the action of the petals 2 supported on them, but return to the initial position

₃₀ while reducing the degree of curvature of the petals 2 - under the action of forces of its own elasticity.

The functions of the heater, which changes the temperature of the petals 2 and 3 behind the perimeter. rows, can perform and the environment itself flows around these elements,

Depending on the. its temperature and will automatically adjust the degree of closure or

40 of the opening of the locking elements in the device in this way without the participation of an additional heater.

Claims (2)

1. ADJUSTABLE SOPLO, containing a cylindrical body with through-channels, in which a locking element is installed, made in the form of a set of petals of a material with thermal memory, and a heating element, characterized in that, in order to extend the functionality, the petals are made in the form of segments obtained by sweeping a circular hemisphere onto the lateral surface of a cylinder with the same base diameter, located along the inner lateral surface of the cylindrical body with two successively arranged annular rows, and the bases of the segments of one row shifted relative to the base segments of another series. 2. The nozzle according to claim 1, which is different from the fact that the petals are made in the form of two plates pressed tightly to one another from materials with different coefficients of linear expansion. H 00 00 cl 00 > 1 1193358 2