Six-blade roots supercharger

Abstract

The invention relates a six-blade roots supercharger comprising a casing, a first end cover and a second end cover. The casing is internally provided with an air chamber for installing a rotor, and the two ends of a rotating shaft of the rotor in the air chamber are each provided with a bearing; an air outlet is formed in the exhaust position, corresponding to the rotor, of the casing, and an airinlet is formed in the intake position, corresponding to the rotor, of the casing; the first end cover is arranged on the side, close to the air outlet, of the casing, and connected with the end of the casing detachably; the first end cover and the casing are provided with connecting holes which are formed coaxially; and the second end cover is provided with a plurality of connecting holes coaxially formed with the first end cover, and connecting pieces are arranged in the connecting holes, coaxially arranged, of the first end cover, the second end cover and the casing. The six-blade roots supercharger is rational in structural design, and a plurality of coaxial connecting holes are formed among the supercharger casing, bearing end covers and a motor end cover, and the three parts are connected through the connecting pieces synchronously; the drilling and assembly procedures are reduced, and equivalently the assembly error rate is reduced; and the machining and assembly efficiency is improved, and the structural strength is ensured.

Description

technical field [0001] The invention relates to a six-lobe Roots supercharger. Background technique [0002] Most of the two rotor blades in the existing Roots supercharger are in the form of three or four lobes. The technology applied to traditional automobiles is relatively mature, but with the rapid development of the new energy field, the fuel cell work needs to adopt The supercharger is used for air supply, and the existing three-leaf or four-leaf supercharger cannot provide enough air for the work of the fuel cell due to the limitation of its own working efficiency. Through improvement and innovation, a Roots compressor with a six-lobe rotor has been developed. Because of the increase in the number of rotor blades, the overall volume and quality of the supercharger have increased compared with existing products. At the same time, because of the two The matching clearance of the two rotors is small, requiring high matching accuracy. When the Roots supercharger with inc...

AI Technical Summary

Problems solved by technology

[0002] Most of the two rotor blades in the existing Roots supercharger are in the form of three or four lobes. The technology applied to traditional automobiles is relatively mature, but with the rapid development of the new energy field, the fuel cell work needs to adopt The supercharger is used for air supply, and the existing three-leaf or four-leaf supercharger cannot provide enough air for the work of the fuel cell due to the limitation of its own working efficiency. Through improvement and innovation, a Roots compressor with a six-lobe rotor has been developed. Because of the increase in the number of rotor blades, the overall volume and quality of the supercharger have increased compared with existing products. At the same time, because of the two The matching clearance of the two rotors is small, requiring high matching accuracy. When the Roots supercharger with increased volume and weight is connected to the external motor, it is necessary to maintain an accurate connection relationship between the rotor, bearings, gears and the motor shaft. The existing supercharger casing, bearing end cover, and motor end cover need to carry out two matching processes when matching, which prolongs the entire installation and matching time, increases the difficulty of installation and matching, and requires repeated drilling during the processing process. The number of connection holes is too much, and because the quality of the six-lobe Roots supercharger increases, the speed and power increase, and the requirements for structural strength increase. Designing too many connection holes will reduce the strength of the structure and affect the service life of the equipment. It is not conducive to the stability of the six-lobe Roots supercharger; and the rotor shaft of the supercharger is connected to the motor through a gear structure, and the gear needs to be located in the oil chamber of the lubricating oil, because the lubricating oil will poison the stack of the fuel cell, Therefore, the air discharged from the Roots supercharger is not allowed to contain oil, that is to prevent the lubricating oil in the oil chamber from entering the air chamber of the supercharger. The existing oil chamber sealing structure may have gaps after long-term use Changes, especially during the working process of the air compressor, the compressed air in the air chamber will slowly enter the oil chamber along the connection gap of the oil seal structure, causing the lubricating oil in the oil chamber to leak into the air chamber; into the oil chamber The air in the oil chamber will also cause the pressure of the oil chamber to rise. In order to relieve the pressure of the oil chamber, the existing technology adopts a vent valve structure connected with the oil chamber, but the high-pressure air of the vent valve will be mixed with lubricating oil during the pressure relief process. discharge, and the pressure relief of the vent valve is delayed, which cannot solve the problem of lubricating oil leaking into the supercharger air chamber, resulting in the reduction of lubricating oil in the oil chamber, which requires manual continuous inspection and replenishment of lubricating oil, and the sprayed oil mist It will also pollute the external equipment of the air compressor

Images