Hierarchy liquid cooling permanent magnet speed inhibitor

Abstract

The invention provides a gradable liquid cooling permanent-magnet retarder, and the retarder utilizes permanent magnets as eddy current brake magnetic sources, and carries out the auxiliary braking toan automobile vehicle through the reverse eddy current braking force produced by rotating non-contacting rotors or stators. The retarder comprises the stators, the rotors and a control mechanism. Thestators include bearing end caps and stator drums, the rotors comprise a plurality of permanent magnets and magnet cages, and the rotors are connected with the stators through two rolling bearings, so the rotors can be rotationally positioned in the stators. The control mechanism is positioned in the rotors for controlling the transmission connection of spacer flanges and the rotors. Two sets ofrotors of the permanent-magnet retarder are positioned at both sides of the control mechanism, and can work independently, thereby realizing the gradable control to the permanent-magnet retarder; thepermanent magnets and the magnet cages serve as rotors, and the outer parts thereof have no rotating part; the control mechanism is easy to realize the switching of braking state of the permanent-magnet retarder; the permanent-magnet retarder has no magnetic leakage moment when in non-braking; and the retarder has advantages of compact overall structure and small volume and light weight.

Description

technical field [0001] The invention is a graded liquid-cooled permanent magnet retarder. The retarder uses NdFeB permanent magnets as the eddy current braking magnetic source, and the reverse eddy current braking force generated by rotating the non-contact rotor or stator, Auxiliary braking of vehicles. 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. At present, the retarders commonly used at home and abroad mainly include hydraulic retarders and electric eddy current retarders. Although their working principles are different, as an auxiliary braking device, their effects are obvious. The permanent magnet type retarder uses its own permanent magnet to form a magnetic field to play a retarding role, so there is almost no power consumption. [0003] The biggest features of the permanent magnet retarder are: 1. It ca...

AI Technical Summary

Problems solved by technology

The permanent magnet retarder only has two working states of braking or non-braking, so the driver cannot provide the required braking torque according to the road conditions and vehicle speed, that is, the hierarchical control of the permanent magnet retarder cannot be realized

[0005] The invention patent (Patent No. ZL200510037966.3) titled "A Classified Control Permanent Magnet Retarder" discloses a permanent magnet retarder that can provide graded braking torque, but this permanent magnet The stator of the retarder is a bracket equipped with permanent magnets. The rotor with helical teeth rotates outside the stator, and the purpose of heat dissipation is achieved through air cooling. These structures have poor heat dissipation effects. When braking for a long time, the temperature of the rotor drum rises and the brake The effect drops significantly; it achieves the purpose of controlling the magnetic circuit by rotating or moving the permanent magnet. This control method not only makes the structure of the permanent magnet retarder complex, the work reliability is low, and there is a magnetic leakage torque when it is not braking.

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