SU356913A1 - COMPRESSOR UNIT FOR AIR DIVERS AIR SUPPLY - Google Patents

Description

According to the main author. St. No. 314413 is a compressor unit for the air supply of divers, including a 1C piston compressor driven, a receiver with a pressure-maintaining valve and an additional cylinder with a spring-loaded post, forming a variable volume tank. In an aggregate, the fluctuation of air pressure in the cylinder of the first compressor stage affects the movement of the piston in the additional cylinder, which results in insufficiently smooth supply of compressed air to the diver.

The proposed unit differs from the known one in that the spring loaded piston is connected to the spool mounted on the suction inlet of the first compressor stage and interacting with the atmospheric pressure. This ensures a smooth supply of compressed air to the diver.

The drawing shows the described unit.

It contains a piston compressor / driven. On the intake port 2 of the first compressor stage there is a tank 3 with throttle openings 4 for the passage of air. The size of the holes 4 varies depending on the position of the spool 5 connected to the force 6 of the auxiliary cylinder 7, inside which the spring 8 is installed.

valve 0. On receiver 9, a valve // is located, designed to maintain constant limiting pressure in receiver 9. The cavities 12 and 13 of the cylinder 7 are interconnected by channels 14 made in the piston 6. iB turn, the cavity 12 is included in the diver's respiratory system, the pressure in which varies depending on the depth of the diver.

When the unit is operating, the Porsche 6 acts from the side of the cavity 12 by a variable force P, determined by the air pressure in the diver’s respiratory system, and from the side of the cavity 13 by the total force P determined by the atmospheric air pressure acting on the spool 5 and the spring force S. The area of the pressure from the side of cavity 12 should be such that 4to6bi should provide the following condition: with an increase in pressure

air in the respiratory system of a diver above atmospheric force P should be greater than PI.

At atmospheric pressure in the respiratory system of a diver, force and force 6

pressed to the end face J5 of the cylinder 7. In this case, the spool 5 connected to the piston 6 closes the orifices 4, which leads to a decrease in the cross-sectional area for the air sucked in the first stage to the air below atmospheric pressure.

As a result, the intake volume in the first stage is reduced and the compressor capacity is reduced. As the air pressure in the diver's respiratory system increases, force P increases, and the piston 6, overcoming the force of the spring 8, automatically moves with spool 5. This increases the flow area of the holes 4, which leads to a decrease in the throttling pressure of the intake air, to increase the suction volume and increase compressor performance. The valve 76 serves to provide a continuous supply of compressed air and eliminate its losses from the receiver 9 during the next purges of the oil and water separator of the compressor. When the pressure in the respiratory system of the diver drops to atmospheric, the piston 6 together with the spool 5 under the action of force P returns to the initial position corresponding to the maximum throttling of the pressure of air drawn into the first stage and the minimum compressor capacity.

Thus, the proposed unit provides a smooth, automatic change in the supply of compressed air to a diver in the right quantity over the entire range of changes in air pressure in the respiratory system, i.e., depending on the depth of the diver.

Subject invention

Compressor unit for air supply divers aut. St. No. 314413, characterized in that, in order to ensure a smooth supply of compressed air to the diver, the spring loaded piston is connected to the spool,

installed on the suction inlet of the first stage of the compressor interacting with atmospheric pressure.

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