Compressor and sliding vane compressor back pressure control structure

Abstract

The invention relates to a compressor and a sliding vane compressor back pressure control structure. The control structure comprises a main shaft, sliding vanes, an air cylinder, a lower flange and anupper flange; the main shaft is provided with a positioning shaft section for mounting the sliding vanes; the air cylinder is cylindrical and sleeves the outer ring of the positioning shaft section;the axis of the main shaft deviates from the axis of the air cylinder; a plurality of sliding grooves extending towards the middle are distributed on the side wall of the positioning shaft section inthe circumferential direction, one sliding vane is clamped in each sliding groove, the outer edges of the sliding vanes abut against the inner wall face of the air cylinder, and the inner ends, closeto the middle of the positioning shaft section, of the sliding grooves and the inner ends of the sliding vanes form sliding cavities; the upper flange and the lower flange are arranged at the two endsof the air cylinder, the end faces, adjacent with the positioning shaft section, of the upper flange and / or the lower flange are provided with back pressure grooves for high pressure oil flowing, and the sliding cavities and back pressure grooves communicate to form back pressure cavities; and the back pressure control structure is further provided with closed cavities and communicating channels communicating the closed cavities and the back pressure cavities. According to the sliding vane compressor back pressure control structure, the pressure fluctuation of the high pressure oil in backcavities of the sliding vanes can effectively reduced.

Description

technical field [0001] The invention relates to the field of compressors, more specifically, to a compressor and a back pressure control structure of a sliding vane compressor. Background technique [0002] Compared with other types of compressors, vane compressors have the advantages of simple parts, no eccentric structure, stable torque and small vibration, and are used in a wide range of fields. [0003] as follows Figure 17 As shown, the sliding vane compressor generally has a plurality of sliding vanes 2, and its operating principle is: when the main shaft 1 rotates, the sliding vanes 2 in the slots of the main shaft 1 sliding vanes 2 will make compound movements together, and the front and rear sliding vanes 2 and The cavity formed by the main shaft 1 and the cylinder 3 changes periodically with the rotation of the main shaft 1, thereby realizing compression or expansion. [0004] Therefore, the prerequisite for the normal operation of the sliding vane 2 compressor i...

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Problems solved by technology

[0008] Whether the slide plate 2 breaks away from the inner wall of the cylinder 3 mainly depends on the "F 背 -F 气 ", the pressure fluctuation in the back pressure groove A will make the back pressure F on the back of the slider 2 背 produce fluctuations, when the pressure on the back of slider 2 is in the trough, it is possible to make F 背 -F 气 <0, causing the head of slide 2 to break away from the inner wall of cylinder 3, resulting in the communication between the two cavities and the impact of slide 2

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