Cylinder type liquid cooling permanent magnet retarder and vehicle comprising same

Abstract

The invention discloses a cylinder type liquid cooling permanent magnet retarder and a vehicle comprising the same. The cylinder type liquid cooling permanent magnet retarder comprises a stator assembly, a magnetic thrust bearing, a rotor assembly and a driving device. The stator assembly comprises a metal cylinder sleeve and an end cover; the magnetic thrust bearing comprises a bearing outer ringand a bearing inner ring; the rotor assembly comprises a key shaft, a key sleeve and a permanent magnet; the key sleeve comprises a bearing mounting cavity, a magnet mounting groove is formed in theperiphery of the key sleeve, and the permanent magnet is mounted in the magnet mounting groove; the bearing outer ring or the bearing inner ring is arranged in the bearing installation cavity; the keysleeve sleeves the key shaft; and the driving device is arranged on an end cover of the stator assembly, and a driving shaft of the driving device is connected with the corresponding bearing inner ring or bearing outer ring. Because of the use of the magnetic thrust bearing, the contact rigid mechanical structure bearing is changed into a non-contact flexible magnetic bearing, the damage to the mechanical bearing caused by the working condition of the high rotating speed and the high thrust is avoided, and the service life of the bearing is prolonged.

Description

technical field [0001] The invention belongs to the technical field of automobile retarders, and in particular relates to a barrel-type liquid-cooled permanent magnet retarder and vehicles including the retarder, such as large trucks and large passenger cars. Background technique [0002] The retarder is a safety auxiliary device for driving brakes, which applies the braking force to the transmission parts of the vehicle to reduce the driving speed of the vehicle. For cars that often travel in mountainous or hilly areas, in order to continuously reduce or maintain a stable vehicle speed for a long time when going down a long slope and reduce or release the load on the service brake, it is usually necessary to install an auxiliary braking device such as a retarder. Usually, passenger cars with a total mass of more than 5t and trucks with a total mass of more than 12t need to be equipped with this auxiliary braking deceleration device. According to its working principle, auto...

AI Technical Summary

Problems solved by technology

The disadvantage of the eddy current retarder is that it is large in size, heavy in body, consumes power and is greatly affected by the ambient temperature. Currently, it is only suitable for large commercial vehicles

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