Scroll refrigerating compressor with scroll plates adopting micro-groove end surface sealing structures

Abstract

The invention relates to a scroll refrigerating compressor with scroll plates adopting micro-groove end surface sealing structures. The scroll refrigerating compressor comprises a shell, a static scroll plate, a dynamic scroll plate, a crankshaft, an upper support, a motor and a lower supporting assembly, wherein static plate scroll teeth are arranged on the bottom surface of the static scroll plate; dynamic plate scroll teeth are arranged on the top surface of the dynamic scroll plate; sealing is achieved by the meshing of the static plate scroll teeth and the dynamic plate scroll teeth. The scroll refrigerating compressor is characterized in that micro-grooves are formed in the addendum end surfaces of the static plate scroll teeth and the addendum end surfaces of the dynamic plate scroll teeth respectively. In the relative movement of an end surface sealing pair, the micro-grooves and surrounding areas generate a hydrodynamic effect, a sealing opening force formed by the combined action of hydrodynamic pressure and medium pressure exceeds a closing force, two sealing end surfaces are completely separated, an oil membrane is formed between the sealing end surfaces, and lubricating and sealing between the static scroll plate and the dynamic scroll plate are achieved; the friction of the sealing end surfaces is pure liquid friction, and the friction state of the sealing pair is greatly improved, so that the effect of optimizing the sealing property is achieved.

Description

technical field [0001] The invention belongs to the technical field of compressors, in particular to scroll refrigeration compressors. Background technique [0002] The scroll compressor forms multiple compression chambers with variable volume through the meshing of the fixed scroll and the movable scroll, and the motor drives the crankshaft to drive the movable scroll to revolve along its orbit, thereby completing the suction of gas, Compress and discharge. The scroll compressor belongs to the third-generation compressor. Multiple compression chambers work at the same time. The gas pressure difference between adjacent compression chambers is small, the gas leakage is small, and the volumetric efficiency is high, which can reach 98%, which is higher than that of the second-generation compressor. Rotary compressors are about 5% more efficient. Based on the advantages of low vibration, low noise, long life, good reliability and high efficiency, the scroll compressor has been...

AI Technical Summary

Problems solved by technology

[0004] The existing technology has the following disadvantages: when using the above method 1, due to the direct bonding of the dynamic and static scrolls, the oil film rigidity is low and the bearing capacity is poor. When the back pressure is too high, the oil film is easy to be damaged. Dry friction occurs between the disks, which accelerates the wear of the scroll disk and reduces the sealing performance, so it is not suitable for use in the case of a large pressure change range

When using the above method 2, since the sealing strips in the movable and static scrolls need a large force to maintain the close contact between the tooth top surface and the tooth bottom end surface of the two scrolls, the sealing strip and the tooth bottom of the scroll The positive pressure between the end faces is relatively large, resulting in large friction loss, which is not conducive to the energy-saving operation of the compressor

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