Embedded electromagnetic liquid cooling retarder with speed increaser

Abstract

An embedded electromagnetic liquid cooling retarder with a speed increaser belongs to the automobile auxiliary braking field. The retarder comprises an eddy current retarder portion and a planetary gear mechanism portion. The eddy current retarder portion comprises a retarder stator, a retarder rotor and an excitation coil. An axial section of the retarder stator is a C-shaped structure. A water channel is arranged in the stator and an external layer surface is provided with a water inlet and a water outlet. The excitation coil is wound into a shape and then is directly and fixedly arranged inthe stator. The rotor is divided into a magnetic conductive tooth portion and a connection portion. A magnetic conductive tooth is embedded between internal and external layers of the stator. A rotorflange is connected to a sun gear of a planetary gear mechanism. The retarder increases a rotation speed of the retarder rotor through the planetary gear mechanism and a speed n of an input shaft isincreased by k times (the k is between 2 and 3). Under the condition that braking power P is not changed, a braking torque T of the retarder can be reduced to T / k so that a massic volume of a retarderbody can be greatly reduced. The structure is simple, a rotational inertia of the rotor is small, a water cooling effect is good and braking safety of an automobile is improved.

Description

technical field [0001] The invention relates to a built-in electromagnetic liquid-cooled retarder with a speed increaser, which is equipped with a planetary gear mechanism, which can amplify the rotational speed of the output shaft of the automobile transmission or the output shaft of the differential, thereby improving its manufacturing efficiency. The dynamic power density effectively ensures the eddy current braking performance of the retarder at the middle and low speed of the automobile, and belongs to the field of automobile auxiliary braking. Background technique [0002] Automobile retarder is a non-contact auxiliary braking device, which can better solve the problem of severe degradation of braking performance caused by continuous braking of automobiles, and at the same time share the braking load of the braking system, greatly The safety, economy and comfort of vehicle driving are mentioned. [0003] At present, when the car is running at medium and low speeds, th...

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Problems solved by technology

[0005] The invention overcomes the low braking power density of the existing eddy current retarder, and proposes a built-in electromagnetic liquid cooling retarder with a speed increaser on the basis of the structure of the eddy current retarder, through the planetary gear mechanism Increase the speed of the retarder rotor, according to the braking power formula of the eddy current retarder, P=2π*k*n*T, increase the speed n of the input shaft by k times through the planetary gear mechanism (k takes a value between 2- 3), under the condition that the braking power P remains unchanged, the braking torque T of the retarder can be reduced to T / k, thereby greatly reducing the mass volume of the retarder body, effectively ensuring The braking performance of the car at medium and low speeds, and the structure is relatively simple and easy to control

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