| 摘要 |
A revolving piston rotary compressor comprises, in combination, the following: a compressor pump; an internal suction gas delivery system which eliminates an external accumulator, excludes a direct distribution of a refrigerant to the suction chamber and performs double-stage liquid-gas separation to prevent slugging, provides cooling of the motor and supercharges refrigerant into suction chamber due to action of an impeller; a discharge system utilizing a tubular discharge valve, a circular expansion cavity equipped with a plurality of reaction nozzles through which the discharge gas is jets ejected rearwards relatively to the intended direction of the revolving piston assembly rotation, said jets that impart driving moment which supplements the main momentum; a lubricating oil delivery system employing a positive displacement oil pump, an oil reservoir formed in the crankshaft and a plurality of oil accumulated annular pockets which prevent formation of “gas lock” condition and accelerate delivery of oil to the bearing and mating surfaces, said oil which will not only lubricate, but will also prevents leakage through the clearances by providing liquid seal with combine pressure-discharge pressure, pumping pressure and pressure developed due to centrifugal forces. An external rotor electric motor of the compressor has been integrated with a pump parts to form the compressor pump arranged on a stationary crankshaft and surrounding by a housing fixed to opposite ends of the crankshaft and having no another contacts with the pump. A stator of the motor is permanently fixed on the stationary crankshaft and the compressor pump components—a rotor block and an eccentrically fit revolving piston assembly are unidirectional spinning around the crankshaft. The rotor block and the revolving piston assembly have no radial clearance internal line contact through which the rotor block transfers an angular moment to the revolving piston assembly. It is not only supplements main momentum transferred to the revolving piston through a rigidly fixed in it vane, but also reduces frictional losses and eliminates leakage losses at the line of contact. |
| 主权项 |
1. A hermetic revolving piston rotary compressor, comprising, in combination:
a housing defined by cylindrical main body portion, an upper and a lower cap interposed and fixedly secured to opposite ends of said cylindrical main body portion to form high pressure side portion of said housing, a base mounting bracket fixedly attached to said lower cap and a top cylindrical cup, open end of which is fixedly secured to a cylindrical projection of said upper cap to form a suction input cavity, said upper cap and said lower cap having each a circular central aperture; a stationary crankshaft, said crankshaft having integrally formed an eccentric, an upper end and a lower end, each of said crankshaft ends being fixedly secured in said circular central aperture of said lower cap and said upper cap to seal said high pressure side portion and separate it from said suction input cavity, said upper end of said stationary crankshaft extends through said upper cap central aperture into said suction input cavity, said stationary crankshaft having a longitudinal channel opened at a top of said upper end positioned in said suction input cavity; an oil containing sump being disposed in interior of said high pressure side portion of said housing; a motor having a stator and an external rotor, said stator being permanently fixed to said eccentric of said stationary crankshaft and said external rotor surrounding said stator comprises a rotor cylinder, inner wall of which housing a plurality of permanent magnets even spaced by an air gap from the facing surface of said stator to form a brushless external rotor motor, said rotor cylinder being rotatable mounted on said eccentric of said stationary crankshaft via a lower and an upper rotor heads each having a central projection equipped with a bearing and a flange portion being circumferentially detachable fixed to the opposed ends of said rotor cylinder, whereby a rotor block is formed, said rotor block housing a motor compartment; a revolving piston assembly having a piston cylinder with a coaxial cavity diameter of which is larger than an external diameter of said rotor block, said piston cylinder surrounded said rotor block and fitted eccentrically to latest without radial operating clearance, said piston cylinder being rotatable mounted on said upper and said lower ends of said stationary crankshaft via a lower and an upper piston heads each having a central projection equipped with a bearing and a flange portion being circumferentially detachable fixed axially to the opposed ends of said piston cylinder to form said revolving piston assembly which houses said rotor block, whereby forming a compressor pump; a working cavity defined as a crescent shaped space formed between external periphery of said rotor block and internal surface of said revolving piston assembly due to difference in diameter and eccentric positioning of said piston and rotor cylinders; a vane which is formed integrally with said piston cylinder, said vane being projected radially inwardly from a surface of said coaxial cavity of the piston cylinder to divide said working cavity into a suction chamber which is in fluid communication with said motor compartment via a suction port, said suction chamber with said suction port positioned on one side of said vane and a compression chamber communicating trough a discharge port of a discharge valve assembly formed in the rim of said piston cylinder, said compression chamber and said discharge valve assembly positioned on opposed sides of said vane which does not slide or swing; a guide bushings which is disposed in a cylindrical aperture extending longitudinally in the wall of said rotor cylinder, said cylindrical aperture having axis parallel to an axis of said rotor block rotation, said guide bushing supporting said vane so that when said rotor block (driver) is rotated, said revolving piston assembly (follower) will be driven simultaneously by the interaction of said vane (coupler) upon said guide bushing which drives said revolving piston assembly by virtue of its bearing seat in said cylindrical aperture where said guide bushing will oscillate to allow for change in angular position of said vane as said rotor block and said revolving piston assembly are rotate in the same direction; an internal suction system which consists of said low pressure side portion of the housing being in fluid communication through said longitudinal channel in the stationary crankshaft with said motor compartment which, consequently, is in fluid communication with said suction chamber through said suction port; a discharge system comprising generally a discharge valve assembly with a discharge valve member disposed in a discharge valve cavity formed in the rim of said piston cylinder, said discharge valve cavity providing fluid communication between said compression chamber and a discharge expansion cavity which is circumferentially formed in said rim of said piston cylinder, a valve retainer with a mounting screw, said valve retainer surrounding by said valve member spaced in said discharge valve cavity; a thrust bearing block being securely mounted above said compressor pump on said upper end of said stationary crankshaft with a thrust seat of said thrust bearing block being biased into engagement with the thrust surface of said bearing fixed in said central projection of said piston upper head to support and limit axial movement of said compressor pump; an integral oil pump—thrust seat block being securely mounted on said stationary crankshafts lower end below said compressor pump with the thrust seat being biased into engagement with a thrust surface of said bearing fixed in the central projection of said piston lover head to support and limit an axial movement of said compressor pump, said oil pump—thrust seat block having a holder comprising an axial aperture to accommodate during assembly said crankshafts lower end, a dead end barrel housing an oil pump piston, said barrel formed with an oil input port and oil discharge channel, said integral oil pump—thrust seat block partially submerged in said oil containing sump; |
