Crankshaft, pump body structure and compressor

Abstract

The invention relates to a crankshaft, a pump body structure and a compressor. The crankshaft comprises a short shaft, an eccentric part and a long shaft which are connected in sequence; the short shaft and the long shaft are coaxially arranged; the central axis of the eccentric part and the central axis of the long shaft and the short shaft are parallel to each other and arranged at an interval,wherein the eccentric part comprises a first end face close to the short shaft, a second end face close to the long shaft and an outer circular face connected with the first end face and the second end face; a plurality of oil guide grooves are formed in the outer circular face; and each oil guide groove is communicated with the first end face and / or the second end face. According to the crankshaft, due to the fact that the oil guide grooves are formed in the eccentric part, when the compressor provided with the crankshaft is started, a layer of oil film with rigidity is automatically generated between the outer circular face of the eccentric part and the inner circular face of a rolling rotor along with high-speed rotation of the crankshaft. The rolling rotor is pushed by the oil film tomove towards an eccentric side, the radial gap between the outer circular face of the rolling rotor and the inner wall of an air cylinder is gradually reduced, and therefore leakage of refrigerants atthe radial gap is reduced.

Description

technical field [0001] The invention relates to the technical field of compressors, in particular to a crankshaft, a pump body structure and a compressor. Background technique [0002] Due to its small size, light weight, reliable operation, and high gas transmission coefficient, the rolling rotor compressor is widely used in home appliances such as refrigerators and air conditioners, making it one of the most important components of these electrical equipment. The performance of the compressor is directly related to the overall performance of the electrical equipment. [0003] The current rolling rotor compressor mainly includes a cylinder, a crankshaft, a rolling rotor and a sliding vane. Among them, the cylinder and the rolling rotor set on the eccentric shaft form a crescent-shaped space, and the sliding plate tightly on the rolling rotor divides this crescent-shaped space into two cavities, and the cavity connected with the suction port is called suction. The air cavi...

AI Technical Summary

Problems solved by technology

The structural characteristics of the rolling rotor compressor determine that there is a matching gap between the rolling rotor and the cylinder. Under the action of the pressure difference, the refrigerant will leak from the compression chamber to the suction chamber through the matching gap, resulting in the failure of the rolling rotor compressor. Decreased volumetric efficiency, which in turn affects the cooling capacity of the compressor

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