Compressor pump structure and compressor

Abstract

The invention discloses a compressor pump structure, and belongs to the field of compressors. A cylinder sleeve is arranged between an upper flange and a lower flange; a cylinder is arranged in the cylinder sleeve; a piston is slidingly arranged in the cylinder; a variable volume cavity is formed among the cylinder sleeve, the cylinder and the piston; a rotating shaft is inserted in the piston; the axis of the rotating shaft is eccentric from the axis of the cylinder, and the eccentric distance is fixed; the rotating shaft drives the piston and the cylinder to rotate; and the piston slides in the cylinder when rotating to change the volume of the variable volume cavity. The cylinder sleeve is arranged, the variable volume cavity is formed among the cylinder sleeve, the cylinder and the piston, and the structure of a piston sleeve is replaced, so that the problem of peripheral leakage channel is not generated anymore, the compressor leakage is radically reduced, and the compressor performance is improved; and the pump structure is simple in machining process and convenient for assembly.

Description

technical field [0001] The invention relates to the field of compressors, in particular to a compressor pump body structure and a compressor. Background technique [0002] At present, the pump body structure of the rotary cylinder compressor usually installs the piston sleeve and the cylinder coaxially, and then places the piston in the piston hole of the piston sleeve. The piston adopts a non-circular structure to prevent the piston from rotating; the suction and discharge The gas passages are all distributed on the cylinder wall. [0003] During the operation of the above-mentioned rotary cylinder compressor, there are the following problems: [0004] 1. There is a circumferential leakage passage between the piston sleeve and the cylinder, which is the main leakage passage of the compressor, resulting in a decrease in the performance of the compressor. [0005] 2. The above-mentioned piston sleeve needs to be radially limited during assembly, and the short-axis cantileve...

AI Technical Summary

Problems solved by technology

[0004] 1. There is a circumferential leakage channel between the above-mentioned piston sleeve and the cylinder, which is the main leakage channel of the compressor, resulting in a decrease in the performance of the compressor

[0005] 2. The above-mentioned piston sleeve needs to be radially limited during assembly, and the short-axis cantilever support of the rotating shaft needs to be used, resulting in a large span of the piston supporting part of the rotating shaft. Under the action of unit force, the deformation and contact stress are too large

[0006] 3. The suction and exhaust passages are distributed on the cylinder wall, which makes the cylinder difficult to process and the processing cost is high

[0007] 4. The outer circular surface of the above-mentioned piston is two sections of arc surface, and two parallel surfaces are distributed in the middle. The piston hole on the matching piston sleeve is also composed of two arc surfaces and two parallel surfaces, resulting in The structure is complex, the processing cost is high, and the processing quality is difficult to guarantee

[0008] 5. The circumferential friction pair between the cylinder and the piston sleeve is a sliding friction pair. The linear velocity of the friction pair and the area of ​​the friction pair are too large during operation, resulting in excessive friction power consumption of the friction pair and affecting the performance of the compressor.

Images