Magnetic suspension screw type refrigeration compressor

Abstract

The invention relates to a magnetic suspension screw type refrigeration compressor. The magnetic suspension screw type refrigeration compressor is characterized in that the magnetic suspension screw type refrigeration compressor is a whole body formed by parts including a machine body component (1), a driving rotor (2), a driven rotor (3), a magnetic coupler (7), a radial permanent magnet bearing (8), a bidirectional permanent magnet axial thrust bearing (9) and the like at least. The magnetic suspension screw type refrigeration compressor has the beneficial effects that the friction power consumption of a rotary moving piece of the compressor is eliminated, oil-free lubrication operation is achieved, the defects of oil film heat resistance and pressure drop increase of a filter screen are eliminated, the comprehensive adaptability and zero leakage of a refrigerant are achieved, a refrigeration circulation system is simplified, resources are saved, and the performance and reliability of the compressor are greatly improved.

Description

technical field [0001] The invention relates to a screw type refrigeration compressor in the field of air conditioning and refrigeration, in particular to a magnetic levitation screw type refrigeration compressor. Background technique [0002] In the field of air conditioning and refrigeration, screw refrigeration compressors are widely used. There are two types of screw refrigeration compressors: open type and closed type. The difference between the two is whether the connection between the motor and the compressor is through a coupling. The independent ones that use couplings and mechanical seals are called open types. The two directly connected without a coupling in the same cavity are called closed. The closed type is divided into detachable semi-closed type and non-detachable fully closed type. [0003] Both open and closed have their pros and cons: [0004] 1. In terms of air tightness, the closed screw refrigeration compressor is produced to overcome the mechanical...

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Problems solved by technology

[0012] 4. In terms of whether the cooling method of the drive motor consumes cooling capacity, the closed type is not as good as the open type

[0014] The motor of the closed screw refrigeration compressor is in the same chamber as the refrigerant, and the cooling of the drive motor is cooled by the liquid or low-temperature gas of the refrigerant. The closed type has the defects of increasing the heat load of the system and consuming cooling capacity

[0015] 5. In terms of the diversity of drive motor loading power, the closed type is not as good as the open type

[0017] The closed screw refrigeration compressor generally selects the loading power of the drive motor according to the maximum working condition of the air conditioner. When the working condition changes, the loading power cannot be changed, and there is a defect of a large horse and a small cart

[0018] 6. As far as the diversity of the driving machine is concerned, the closed type is not as good as the open type

The oil circuit circulation system is complex and has many components. For example, an oil separator, oil cooler and circulating oil pump are required in the system, and it is difficult to return oil. For example, the flooded evaporator in the system cannot fully separate oil and vapor. Defects of increasing oil film thermal resistance and filter increasing pressure drop in condenser and evaporator

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