SU1725045A2 - Heat generator - Google Patents

Abstract

The invention can be used in devices for producing high-temperature and high-speed gas streams for heating or cutting various materials. The purpose of the invention is to increase efficiency by increasing the degree of air preheating. The heat generator includes a housing 1 with two chambers 2 and 3 of combustion, each of which is equipped with pipes 4 and 6 for supplying air, fuel

Description

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distribution nodes 5 and 7 and the heat exchanger. The heat exchanger consists of air channels 8 and 9 for supplying air to the combustion chamber 3 and annular clearances for discharging the combustion products of the combustion chamber 2. When the heat generator operates, a significant increase in temperature is achieved. The invention relates to heat power engineering, can be used in devices for producing high-temperature and high-speed gas flows for heating or cutting various materials, and is an improvement of the invention according to the authors. St. No. 1666900.

A heat generator is known, comprising a housing with two combustion chambers, each of which is provided with an air supply pipe and a fuel delivery unit, and a heat exchanger equipped with air ducts connected to the second combustion chamber, the heat exchanger being formed by a housing wall and coaxially installed shells of different lengths inside it, the first combustion chamber is installed with the formation of an annular gap inside the short shell, the end of which from the side of the second combustion chamber is blocked by an additional insert whoa.

The disadvantage of the known heat generator is low efficiency due to the low degree of air preheating due to the fact that the combustion products of the first chamber are emitted into the atmosphere with a high temperature.

The purpose of the invention is to increase efficiency by increasing the degree of air preheating.

The goal is achieved by the fact that in a known heat generator comprising a housing with two combustion chambers, each of which is provided with an air inlet pipe and a fuel delivery unit, and a heat exchanger equipped with air ducts connected to the second combustion chamber and formed by the housing wall and coaxially installed inside it shells of different lengths, and in which the first combustion chamber is installed with the formation of an annular gap inside a short shell, the end of which is from the side of the second combustion chamber Covered with an additional insert, between the case and the long shell two additional shells of the same length are coaxially mounted, forming a cavity communicated with one

A speed jet emanating from the nozzle 15 due to the effective heating of the air supplied to the combustion chamber 3, and the combustion products of the combustion chamber 2 are rationally used by creating a heat shield with the combustion products flowing out of the nozzle 19. 1 Il.

side with an annular gap between the first combustion chamber and the short shell, and on the opposite side made in the form of an annular nozzle.

The drawing shows a heat generator,

lengthwise cut.

The heat generator includes a housing 1 with chambers 2 and 3 combustion. Chamber 2 of the combustion is equipped with a pipe 4 for supplying air and

the fuel delivery unit 5, and the combustion chamber 3 is provided with an air supply pipe 6 and a fuel delivery unit 7. Air chambers 8 and 9 of the heat exchanger formed by the wall of the housing 1 and coaxially installed inside it are short and long shells 10 and 11, the combustion chamber 2 is connected to the combustion chamber 3 installed with the formation of an annular gap 12 inside the short shell 10, the end of which from the side of the combustion chamber 3 is blocked by an insert 1.3. The fuel distributing unit 7 of the combustion chamber 3 is provided with nozzle nozzles 14 directed to the insert 13. The combustion chamber 3 has a confusion-diffuser nozzle 15.

Between the housing 1 and the long shell 11 coaxially installed two additional shells 16 and 17 of the same length, forming a cavity 18, communicated with

one side with an annular gap 12, and on the opposite side made in the form of an annular nozzle 19, coaxially covering the confused-diffuser nozzle 15.

The heat generator works as follows.

Air and fuel are respectively supplied to the combustion chamber 2 through the pipe 4 and the node 5, respectively, which are ignited and burned to form combustion products. The products of combustion unfold at the insert 13, fall into the annular gap 12, and then, turning again, into the cavity 18, the annular nozzle 19 and are discharged from

high speed in the direction of the heated object.

Air is supplied to the combustion chamber 3 through the pipe 6, and fuel is fed through the fuel supply unit 7. Before it enters the combustion chamber 3, the air is preheated in channels 8 and 9. The heated air mixes with the fuel flowing from the nozzle nozzles 14 and a combustible mixture is formed, which, burning, creates a high-temperature jet of combustion products flowing through the nozzle 15. At the same time the combustion chamber 3 is performed when the combustible air-fuel mixture is supplied to the red-hot insert 13, which allows an increase in the evaporation rate of the mixture, provides an increase in the degree of air preheating, thereby increasing the efficiency The notes of the heat generator.

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Claims (1)

Invention Formula Heat generator auth. St. No. 1666900, characterized in that, in order to increase efficiency by increasing the degree of air preheating, between the casing and the long shell two additional shells of the same length are coaxially installed, forming a cavity communicated on one side with an annular gap between the first combustion chamber and the short shell, and on the opposite side made in the form of an annular nozzle.