rotary compressor  
 
   A rotary compressor able to generate a volume of air with a determined pressure and a consumption of very lesser energy to an equivalent machine, has been made.

   As already it has been described, this mechanism, be formed basically for a lever, which has a slotted central area, and which rotates over a stationary crankshaft. It is based on one set, which comprising two housings wherein the lever is anchored by a shaft, about which it pivots, located in the peripheral area of the casing. By rotating the unit, applying a force on the housing, the lever slides along the grooved area on the crank journal, which acts as a fulcrum and produce an oscillation of the lever that is proportional to the length of this and to the radium of the eccentric male pivot.

   With this system it has been created a module constituted by a crankcase with two opposed, situated levers according to it has been described, that rotates on a crankshaft of two journals, located diametrically opposed. Two cylinders are fixed to the crankcase by their cylinder heads. Each cylinder contains a piston that is connected to the free end of the lever by a connecting rod. In each rotation an admission-compression cycle of the air in the cylinders occurs.

   Power to impulse this mechanism is applicable on the crankcase by means of a motor that he performs with a strap on a pulley, this way the power is transmitted by the spin axle of the lever. The arm of strength is the included among this axle and the male pivot of the crankshaft, which acts as fulcrum. Adjusting its length to the size required according to the amplitude of the compressor that is desired and reducing the length of the arm of resistance, which is the included among the fulcrum and the extreme of the lever, to the minimum possible, gets a multiplication of the potency according to the desired performance.

   The compressed air exits through a rotary joint coupled to the crankcase’s axle.

   With this arrangement, in addition to get the rotation of the set and the linear displacement of pistons, they get a series of improvements:
  • All of the parts that rotate with the crankcase are balanced by another counterpart, positioned diametrically opposite.
  • A greater ratio between the arms improves the machine’s power input. This means that the resistance arm must be made as short as possible and a balance must be found between the radial displacement of the crankshaft journals (diameter) and the length of the effort arm to obtain the required productivity.
  • The rotation of the unit facilitates the loss of the heat generated when compressing air by adding extended surfaces (fins).
  • Pistons are drive at almost linear way minimizing the lateral loads on the cylinder's walls.
  • As the centrifugal forces that appear in the pistons, connecting rods and levers principally act radials, they are countered by the forces applied to the piston heads.

   The prototype that was described is a volumetric alternative compressor of simple-acting, with the following technical specifications:
  • Nº of Cylinders 2.
  • Piston diameter 90 mm.
  • Piston Stroke 113.16.
  • Rotational speed of the compressor 946.7 r.p.m.
  • Electrical motor power 3 Kw.
  • Motor speed 2840 r.p.m.
  • Working pressure 8-10 bares
  • Theoretical output 1363 l/min

   This design has not be optimized to achieve the better characteristics like compressor, rather only has had itself in account for the demonstration of the efficiency of the mechanism, for this motive, the performances can be better maintaining identical consumption of energy.