Compressor oil pump system

Abstract

The invention relates to an oil pumping system of a compressor. The oil pumping system mainly comprises a crankshaft arranged in a cylinder seat and a rotor, and an oil suction pipe connected with the lower end of the crankshaft, wherein the upper end of the crankshaft is a solid rod body and the lower end of the crankshaft is a hollow oil guide pipe; a spirally extending oil groove is formed on the outer surface of the solid rod body; an oil hole by which the oil groove is communicated with the oil guide pipe is formed at the lower end, connected with the oil guide pipe, of the oil groove; the oil suction pipe is a cylindrical pipe with a hollow inner part, and openings are formed at the upper end and the lower end of the cylindrical pipe; at least one air hole is formed in the oil suction pipe; the surface or the curved surface where the air hole is formed is inwards contracted relative to the cylindrical surface of the oil suction pipe; and during assembly, the air hole is positioned below the lower end face of the rotor and above the oil level. By the structure, the problem of unsmoothness, caused by a small gap between the end face of an axial hole of the cylinder seat and a counter bore of the rotor, of an air channel can be solved completely; furthermore, as the air channel does not extend towards the upper end of the crankshaft and the upper end of the crankshaft is the solid rod body, the anti-bending capacity of the crankshaft when the diameter of the crankshaft is reduced and the smoothness of the air channel can be guaranteed.

Description

technical field [0001] The invention belongs to the field of compressor manufacturing, and in particular relates to an oil pumping system for a refrigeration compressor. Background technique [0002] Hermetic refrigeration compressors generally use a reciprocating piston crankshaft-connecting rod mechanism, such as figure 1 As shown, it includes a cylinder block 1, a crankshaft 2a, and a connecting rod 10. The crankshaft 2a rotates to push the connecting rod 10 and the piston (not shown) to reciprocate. Its oil pumping system is composed of crankshaft 2a, oil suction pipe 4a, and oil suction spacer 5. Oil suction spacer 5 is embedded in the interference phase of oil suction pipe 4a. Oil suction pipe 4a is in interference fit with crankshaft 2a at the lower end of crankshaft. in oil. The oil pumping principle is as follows. When the rotor 3 is driven by the motor (not shown in the figure) to rotate with the crankshaft 2a and the oil suction pipe 4a, the oil will flow along ...

AI Technical Summary

Problems solved by technology

However, according to the design principle, the distance between the end face of the shaft hole of the cylinder block 1 and the end face of the counterbore of the rotor 3 at the air hole 8b is only 0.2-0.53 mm. Since the gas channel does not extend upward, the upper part of the crankshaft is solid, and its bending resistance has been improved. Reinforced, but equivalent to the gas channel is only 0.2 ~ 0.53mm, the channel area is extremely small, not very smooth, the oiling speed and pumping capacity of the pump oil are not very good

Therefore, the advantage of this method is that the crankshaft has a good shaft bending ability, but the disadvantage is that the gas passage is not smooth, which leads to poor oiling speed and pumping ability of the pump oil, which affects the lubrication of the moving range.

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