SU907596A1 - Induction apparatus - Google Patents

Description

(54) INDUCTION DEVICE

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The invention relates to electrical engineering, in particular to induction apparatuses with directional movement of the refrigerant, scale in the windings.

Transformers with autonomous directional oil movement (Р1ДМ) 8 windings are known, whose lead to the lower ring insulation of the winding is carried out with the help of pipelines, in case of stopping the pump of the BAT circuit, the movement of the refrigerant in the winding stops. And since the volume of refrigerant enclosed in the winding is only a few percent of its total volume in the transformer tank, an immediate load cut-off is required in order to avoid a transformer crash. Immediate shutdown of the load can lead to emergency compression in the power system, and at a nuclear power plant - to radioactive contamination of the environment.

A transformer is known, comprising a core with windings placed in a tank filled with a refrigerant and a cooling system consisting of a heat exchanger, a pump i

And pipelines. The refrigerant is pumped through the pipe line through the heat exchanger to the windings and the tank, or only in to the transformer. In the latter case, the refrigerant in the pump is supplied by another pump 1.

The disadvantage of this design of a transformer is that with a large or full load n (it leads to a transformer crash. Slowly, such a design is generally acceptable for transistors operating at full or significant load.

Also known is a transformer containing, with windings, placed in a tank filled with refrigerant, and a cooling system consisting of a one-way heat exchanger, a pump and a pipeline with an intermediate chamber, in which the collapsing valve is displaced. Here, when the pump is not running, the coolant is circulated by convection along the contour: tank - heat exchanger - winding - tank. When the oil temperature rises, 39 permitted, the pump is turned on and the flap valve is pumped by the pumping oil into the intermediate chamber, closes the heat exchange valve 1P1k winding and only forced circulation of the refrigerant along the contour; tank - heat exchanger - pump - winding - tank 2. The disadvantage of this tr cformator is that when the cooling system pump is stopped, the refrigerant access stops. In addition, the design of its cooling system can only be used for one-way heat exchangers, a special intermediate chamber is needed to install a flapper valve in it, which requires a complicated design and requires the valve to be installed in a strictly defined position: horizontal or with a slight slope, otherwise, the valve will not close. The purpose of the invention is to simplify the design and increase the reliability of the device. The goal is achieved by the fact that in an induction apparatus containing a magnetic core with windings placed in a tank filled with refrigerant and a cooling system consisting of heat exchangers, pumps and pipelines with reducing valves made in the form of two hollow telescopic cylinders, the movable of which is equipped a transverse partition with a calibrated hole, n is spring-loaded with a calibrated spring, the fixed cylinder is fixed on the oil line under the winding. FIG. 1 shows a transformer, a general view; in fig. 2 and 3 — node 1 in FIG. 1; the Transformer (FIG. I) contains an active (removable) part consisting of a magnetic circuit 1 with windings 2 located on its rods placed in a tank filled with refrigerant and a cooling system 3. The cooling system consists of single or multi-pass heat exchangers 4, pumps 5 and 6, pipelines 7 and pressure reducing valves 8.

Each reducing valve (Figs. 2 and 3) consists of at least two hollow telescopic cylinders: fixed 9, mounted at the end of the pipeline supplying the refrigerant to the phase winding unit, and movable 10 located on the stationary cylinder.

On the outer cylindrical surface of the fixed and inflow cylinders there are protrusions 11, executed, for example, in the form of nousleins, to which their ends are attached to a cylindrical

Claims (2)

An induction apparatus containing a magnetic core with windings located in (ike, filled with refrigerant, and a cooling system consisting of heat exchangers, pumps and pipelines with pressure reducing valves, characterized in that, in order to simplify the design and increase reliability, the reduction valve is designed as two hollow telescopic cylinders, the bottom of which is provided with a transverse overburden, having a calibrated orifice, and spring loaded with a calibrated spring, non-spring 2, designed for watching a rolling cylinder Alignment to the initial position (Fig. 3). In addition, a transverse partition 1.3 is installed in the cavity of the movable cylinder, and a calibrated orifice 4. The partition is designed to move the qi; gander 10 from the impact of the refrigerant stream pumped through the pipelines 6. 6 The movable cylinder 10 under the influence of the spring 12 is in the initial position (Fig. 3) and does not connect the pipeline with the hole in the bottom end insulator of the winding. When the pump is turned on due to the pressure difference that forms before the calibrated orifice 14 and after it, a motive force arises that moves the cylinder 10 all the way to the insulation (Fig. 2), as a result of which the refrigerant enters the winding. When the pump stops, the force that presses the cylinder 10 to the insulation disappears and the cylinder returns to its initial position under the influence of the spring 12 (Fig. 3), thus opening the access of the refrigerant from the tank to the winding. The presence of spring 10 allows the reduction valves to be installed in any position, i.e. place it at any angle. In transformers with NDM, regardless of the magnitude of the load on it, when the voltage is applied, the pump 6 of the NDM circuit is automatically turned on, although at a load less than nominal it may be sufficient to cool the convective windings (Fig. 3) of the oil in the tank. This allows for partial load or no-load transformer to save energy and pump life. The invention is directed to increasing the operational reliability of induction apparatuses having directed oil movement. Invention Formula 5 9075% 4 11TSVIZE 11YN cylinder attached to a mascopic high-voltage apparatus. Transformer under the winding. Power capacitors. Issue 3/591, Sources of information, 1976, p. 1, Fig. 1. When you take into account during the examination 1. 3neKTpOTeXFiH4ecKaH industry.5 2. Patent of Germany N 2330212, cl. H 01 F 27/12 ,. Abstract scientific and technical collection. Se-1978.