RU2535289C1 - Method of restoring tightness of radiator - Google Patents

Abstract

FIELD: heating.

SUBSTANCE: in the method of restoring tightness of radiator, comprising heating the compressed air, its feeding into a supersonic nozzle and forming in this nozzle of supersonic air flow, feeding to this flow of the powder material, acceleration of this material in the nozzle by the supersonic air flow and its direction on the nontight part of the surface of the treated radiator, a pad is additionally used, made in the form of a wire made of aluminium alloy and mounted in proximity with the nontight part of the surface.

EFFECT: providing high quality of restoring, increase in adhesion strength of the gas-dynamic coating and resistance of the sealing connection, the ability to work at maximum pressure.

3 dwg

Description

The invention relates to methods for repairing radiators of aluminum alloys of all types and purposes, consisting of tanks and cores in the form of parallel tubes, and can be used to seal leakages in hard-to-reach places without laborious dismantling and assembly operations.

A known method of sealing cracks and holes with powder materials by the method of "cold" gas dynamic spraying (CGD), including heating compressed gas (air), feeding it into a supersonic nozzle and forming a supersonic air stream in this nozzle, feeding powder material into this stream, accelerating this material in a nozzle by a supersonic air flow and its direction to the surface of the workpiece (V.N. Khromov, A.V. Kolemeychenko, N.V. Titov, V.N. Logachev, A.A. Zhosan, A.L. Semeshin, V .N.Korenev, R.Yu. Blinnikov. Repair technology machines.Laboratory workshop.Part II - Orel: publishing house Orel GAU, 2009. - 156 p. S. 92-94) [1].

The disadvantage of this method is the impossibility of sealing compounds in hard-to-reach places, such as the lateral surfaces of parallel tubes of the core of radiators and the connection of these tubes with tanks. The method does not provide the optimum angle of attack of 90 ° ± 10 ° during spraying ([1], Fig. 6, p. 106), which leads to the fact that the sprayed material is not fixed on the surfaces to be sealed.

The objective of the invention is to eliminate leaking areas in hard to reach places.

The technical result of the invention is the optimization of the angle of attack during spraying and fixing the sprayed material on surfaces to be sealed in hard to reach places.

The task and the specified technical result is achieved by the fact that in the known method, which includes heating compressed air, supplying it to a supersonic nozzle and forming a supersonic air stream in this nozzle, supplying powder material to this stream, accelerating this material in the nozzle by a supersonic air flow and direction it on an untight portion of the surface of the treated radiator, ACCORDING TO THE INVENTION, additionally use a lining made in the form of an aluminum alloy wire, and set in close proximity to an unsealed surface area.

The invention is illustrated by drawings, where:

figure 1 - General view of the implementation of the proposed method;

figure 2 is a fragment of the restoration of the tightness of the lateral surface of the parallel tubes of the core of the radiators without the use of a lining;

figure 3 is a fragment of the restoration of the integrity of the lateral surface of the parallel tubes of the core of the radiators using a lining.

The method of restoring the tightness of the radiator is as follows.

In close proximity to the leak point 1, a lining 2 is installed in the form of an aluminum alloy wire (Fig. 1). Next, the process of applying HGDN to the above location is performed. In case of inaccessibility of the leak (Fig. 2), for example, the side surfaces of parallel tubes 3 of the core of the radiators and the connection of these tubes to the tanks, the nozzle 4 of the apparatus cannot be located at right angles to the sprayed surface. Thus, the lining 2 in the form of a wire helps to delay the sprayed powder material in these places.

When spraying on an inaccessible area, the powder is retained on surfaces perpendicular to the sprayed stream of powder material particles (Fig. 3). As a result, the applied powder material forms a coating at the junction of the wire to the surface to be sealed, thereby sealing the leak point 1 in the above section, reliable operation of the radiator due to the reinforcement of the connection with a power element in the form of a wire.

After spraying, excess wire is easily removed even without the use of a tool; the radiator is tested by pressure testing. After the test, the radiator is ready for use.

Using the proposed method, leaky radiators restored oil transmissions of energy-saturated tractors, engine cooling systems, air conditioning systems, etc.

Spraying is carried out using DIMET equipment, mod. 403, with powder material A-20-11 intended for forming a sealing compound containing aluminum powder with a particle size of 1-50 μm, zinc powder with a particle size of 1-100 μm and silicon carbide powder with a particle size of 1-60 microns.

After restoration of the radiators by the claimed method, a leak test was carried out (pressure 0.5 MPa), depressurization of the coatings was not found.

Thus, the proposed method provides high quality repairs, an increase in the adhesion strength of the gas-dynamic coating and the durability of the sealing compound, the ability to work at maximum pressure.

Claims (1)

A method for restoring the tightness of a radiator, including heating compressed air, supplying it to a supersonic nozzle and forming a supersonic air stream in this nozzle, supplying powder material to this stream, accelerating this material in the nozzle with a supersonic air flow and directing it to an untight portion of the surface of the treated radiator, characterized the fact that they additionally use a lining made in the form of an aluminum alloy wire and installed in close proximity to an unpressurized surface area.

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