A high-pressure ultra-high pressure shielded compressor

Abstract

The invention relates to the field of compressors, in particular to a high-pressure / ultrahigh-pressure shielding compressor. The high-pressure / ultrahigh-pressure shielding compressor consists of a machine head, an impeller, a motor shell, a motor stator, a motor lead module, a shielding sleeve, a motor rotor, a machine head side bearing assembly, a back cover, a back cover bearing assembly, a pressure balance diaphragm, a bracket A and a bracket B. The high-pressure / ultrahigh-pressure shielding compressor not only overcomes the defect of incapability of shielding conveying gas and a motor stator coil due to no sealing structure between a traditional impeller main shaft hole and an impeller main shaft, but also overcomes such defects as damage of a pressure balance diaphragm and a shieldingsleeve and difficult installation of a motor stator lead easily caused by thermal expansion and cold shrinkage of filled inertia liquid and bad sealing of related matching components such as a high-pressure / ultrahigh-pressure medium environment shielding motor, so that the high-pressure / ultrahigh-pressure shielding compressor is reliably sealed, the shielding sleeve is not influenced by thermal expansion and cold shrinkage of the inertia liquid, the installation and the maintenance are convenient, and the popularization and application value is achieved.

Description

[0001] 1. Technical field [0002] The invention relates to the field of shielded compressors, in particular to a high-pressure and ultra-high pressure shielded compressor. [0003] 2. Technical Background [0004] Rotary compressors, especially centrifugal compressors, need to be sealed between the compressor main shaft or transmission shaft and the shaft hole on the compressor casing. In order to solve the problem of sealing friction or leakage, people have proposed a non-sealed structure between the main shaft of various compressors or its drive shaft and the shaft hole on the compressor casing, which is suitable for conveying flammable, explosive, corrosive, Noble, radioactive and highly toxic gas. Published by the China Intellectual Property Office on February 23, 2018, the application publication number is CN107733163 A, and the invention patent titled "A Motor, Centrifugal Compressor and Air Conditioning Unit" directly connects the main shaft of the impeller of the comp...

AI Technical Summary

Problems solved by technology

Published by the China Intellectual Property Office on February 23, 2018, the application publication number is CN107733163 A, and the invention patent titled "A Motor, Centrifugal Compressor and Air Conditioning Unit" directly connects the main shaft of the impeller of the compressor to the drive shaft of the motor , There is no seal between the impeller spindle hole on the compressor volute and the impeller spindle, allowing the conveyed gas to flow from the back of the impeller to the gap between the motor rotor and the motor stator, and there is a spiral groove between the inner cavity of the motor casing and the outer circle of the motor stator , and divert the conveyed gas into the spiral groove, then flow out through the gap between the motor stator and the motor rotor, and then discharge after converging at the outlet on the motor housing, which plays the role of cooling the motor stator, but the problems existing in this invention patent The stator coil of the motor is directly exposed to the conveying gas, so it cannot be used for corrosive and high-temperature conveying gas

China State Intellectual Property Office announced on August 21, 2018, the application publication number is CN108425862 A, the invention patent titled "Oil-free Centrifugal Compressor Used in Low-capacity Applications", which transports gas from the tail of the motor It is introduced into the passage of the motor casing, and the gap passage between the motor stator and the motor rotor, and then discharged from the discharge hole of the motor casing on the compressor side, and enters the compressor inlet, so that the compressor volute impeller shaft hole and the impeller shaft There is no seal and no leakage between them, but the problem in this invention patent is still that the stator coil of the motor is directly exposed to the conveying gas, which cannot be applied to the corrosive and high-temperature conveying gas

Authorized by the State Intellectual Property Office of China on June 16, 2010, the authorization announcement number is CN1013 59849B, and the invention patent named "High-voltage and ultra-high-voltage medium environment shielded motor" has the shielding sleeve that does not cause stress due to high-voltage and ultra-high-pressure medium pressure. Advantages, it provides favorable conditions for the combination of innovative high-pressure and ultra-high pressure shielded compressors; however, the shielding sleeve and pressure balance diaphragm of this patented technology are sealed with O-rings, and the seal is not reliable; the structure of the shielding sleeve and pressure balance diaphragm cannot be eliminated. Due to the difference between the filling temperature of the inert liquid and the working temperature, the volume of the inert liquid expands and contracts, which easily damages the shielding sleeve and the pressure balance diaphragm due to thermal stress; it is difficult to connect the lead wires of the motor stator, and it is not easy to install and maintain. Implementation of Technology in Combining Innovative High Pressure and Ultra High Pressure Shielded Compressors

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