Eccentric device for vortex compressor

Abstract

The invention discloses an eccentric device of a scroll compressor. The scroll compressor is composed of a scroll stator, a scroll rotor, a drive shaft, a fixed bushing and a fixed pin. The drive shaft is inserted into the rotor and the drive motor. In the shaft hole of the frame, a radially supported rotating structure is formed, and an eccentric structure is formed protruding above the rotating structure. The fixed bushing is connected with the end of the eccentric structure of the driving shaft, and the fixed pin is connected to the critical line of the driving shaft and the fixed bushing. Fittingly intervened between the two, a pin groove is formed between the outer peripheral surface of the eccentric structure and the inner peripheral surface of the corresponding fixed bushing, the pin groove has a circular cross section, and the fixed pin is inserted inside the pin groove, so The invention expands the scope of use of the mold for making the main frame, thereby reducing the cost, making the assembly engineering simpler and beneficial to improving production efficiency.

Description

technical field [0001] The invention relates to an eccentric device of a scroll compressor. Background technique [0002] Generally, scroll compressors are classified into variable radius type and fixed radius type according to the leakage prevention method in the radial direction. The variable radius type means that when liquid refrigerant or engine oil and foreign matter enter the compression chamber, causing the pressure inside the compression chamber to rise abnormally, in order to prevent damage to the spiral wrap, the scroll rotor is radially retreated, while the fixed radius type It refers to the way that the vortex rotor always rotates in the same orbit no matter how the compression conditions change. Both variable-radius and fixed-radius scroll compressors have their own advantages and disadvantages, and the present invention utilizes the advantages of the two scroll compressors to effectively prevent the radial leakage of refrigerant gas. [0003] Such as figure...

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Problems solved by technology

[0006] However, according to the driving mode of the existing scroll compressor as mentioned above, the degree of eccentricity of the eccentric structure 5b arranged on the upper end of the drive shaft 5 is different, so the shaft holes 2a of the main frame 2 also need to be made separately. , so that molds need to be made separately, which not only increases the production cost, but also separately assembles the main frame 2 for the fixed-radius scroll compressor and the main frame 2 for the variable-radius compressor during assembly, so the assembly engineering is relatively complex

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