SU1495410A1 - Gas-jet device for cleaning airfield paving from ice - Google Patents

Abstract

1. A gas jetting device for cleaning airfield coatings from ice, comprising a base chassis, an aircraft engine with a compressor, connected to the chassis, a nozzle connected to the aircraft engine and including an upper, lower and side walls, a main pneumatic chamber located on the upper wall of the body and connected by a pipeline with a compressor, characterized in that, in order to increase productivity by reducing the hydraulic losses in the nozzle, it is equipped with additional pneumatic chambers mounted on the outer surface of the side the walls of the housing and communicated with the compressor, while the internal cavities of the additional pneumatic chambers and the nozzles communicate with each other by means of slots formed in the side walls of the nozzle and directed tangentially relative to the latter. 2. The device according to claim 1, characterized in that the total areas of the flow areas of the slots of each additional pneumatic chamber are equal.

Description

This invention relates to machines for cleaning airfield pavements in winter.

The purpose of the invention is to increase productivity by reducing the hydraulic losses in the nozzle.

 Figure 1 shows the device, side view; figure 2 is a view of A in figure ;, figure 3 is a node I in figure 2.

The gas jet device comprises a base chassis 1, to which an aircraft engine 2 is attached, having a compressor. The aircraft engine rests on the wheels 3 and communicates with the nozzle 4, which includes upper, lower and side walls.

The main chamber is mounted on the upper wall (not shown), and on the side walls there are additional pneumatic chambers 5, communicated with the compressor through pipelines with a valve 6. The internal cavities of the nozzle 4. and additional pneumatic chambers 5 are interconnected by means of slits 7 formed in the side walls of the nozzle 4 and directed tangentially relative to the latter. The total area of the flow areas of the slots 7 of each additional pneumatic chamber 5 are equal to each other.

The operation of the device is carried out

in the following way.

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The flow, exiting at high speed from the working turbine of the aircraft engine 2, fills the internal cavity of the nozzle 4, is distributed to the width of the processed strip and is directed to the floor. At the same time, compressed air from the compressor of the aircraft engine 2 flows through pipelines into

104

pneumatic chambers and through the perforated slits 7 at high speeds flow along the side walls inside the nozzle 4. Such an increase in velocity near the wall eliminates the separation of gas vortices on it or leads to a longer occurrence of separation and prevents asymmetric formation of vortices.

 S

Type A

Workflow

From the compressor. IvaaShshte / 19

Phage. five

Claims (2)

1. A GAS-GAS DEVICE FOR CLEANING ICE OF AERODROME COATINGS, comprising a base chassis, an aircraft engine with a compressor connected to the chassis, a nozzle in communication with an aircraft engine and including an upper, lower and side walls, a main air chamber located at the upper wall of the body and pipeline with a compressor, characterized in that, in order to increase productivity by reducing hydraulic losses in the nozzle, it is equipped with additional pneumatic chambers mounted on the outer surface of the sides walls of the casing and communicated with the compressor, while the internal cavities of the additional pneumatic chambers and nozzles are interconnected by means of slots formed in the side walls of the nozzle and directed tangentially relative to the latter. 2, The device according to claim 1, characterized in that the total area of the passage sections of the slots of each additional pneumatic chamber is equal.