Star rotor compressor structure belongs to rotary guide mechanism
The star rotor refrigeration compressor is completely different from the reciprocating type and the rotary type, and has the characteristics of both. From the aspects of kinematics, dynamics, structural characteristics and craftsmanship, it is better than the current rotary model to a certain extent. Star-rotor refrigeration compressors are worthy of research in refrigerators, air conditioners, and small and medium-sized refrigerated cold heading refrigeration systems. It is especially necessary to discuss the structure in particular. In mechanical kinematics, the star rotor structure is a rotating guide mechanism. If the crank radius is r, the eccentricity is e, the crank angle θ and the guide pivot angle d, and λ=e/r=1, then: w2=w1/2 can be used to draw an important conclusion: when λ= 1, when e = r, if the crank rotates at an angular velocity w1 at a constant speed, the guide bar 2 also rotates at an angular velocity w2 at a constant speed. The star-rotor piston type is designed with the characteristics of the rotary guide mechanism model guide mechanism r=e as shown in Fig. 1. The cylinder is equivalent to a guide rod and the piston is equivalent to a slider. When the crankshaft rotates for two weeks, the cylinder rotates one revolution. When the crankshaft rotates at a constant speed, the angular acceleration of the cylinder is zero, and therefore the rotational moment of inertia of the cylinder is also zero. Because of the symmetry and mass balance of all the rotating parts, the machine runs smoothly and the vibration is small. The structure of the star rotor refrigeration compressor is composed of a double-acting piston, a cylinder body, a machine body, a front end cover, a rear end cover, a rolling bearing, a mechanical seal, and the like, which are cooperatively engaged with a crankshaft crank pin. The crankshaft rotates clockwise as the prime mover drags. The eccentric moment of the crankshaft centerline and the crankshaft centerline is E, so the piston reciprocates under the crank journal drive, and the piston transmits part of the torque to the cylinder in the form of lateral force while the piston reciprocates. The dial cylinder and the piston rotate together.
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