Hydraulic retarder oil return structure

Abstract

The invention belongs to the technical field of hydraulic retarders, and particularly relates to a hydraulic retarder oil return structure. The structure comprises a front end cover oil return flow passage, a front end cover oil inlet groove, a retarder shell body oil return passage and a top cover oil return opening, wherein the front end cover oil inlet groove is communicated with one end of thefront end cover oil return flow passage, the retarder shell body oil return passage is communicated with the other end of the front end cover oil return flow passage, and the top cover oil return opening is communicated with the retarder shell body oil return passage. The hydraulic retarder oil return structure is simple, the processing is simple, the cost is saved, and whether oil seals leak oilor not can be checked so as to prolong the service life of the hydraulic retarders.

Description

technical field [0001] The invention belongs to the technical field of hydraulic retarders, in particular to an oil return structure of a hydraulic retarder. Background technique [0002] The hydraulic retarder is an auxiliary braking device for motor vehicles. It is mainly composed of a stator impeller, a rotor impeller, a retarder housing, a working chamber, a heat exchanger and an oil tank. It is essentially a rotary damping device. , using the rotor impeller to drive the working fluid to impact with the stator impeller to generate reverse vortex torque, which converts the kinetic energy of the vehicle into the heat energy of the working fluid, thereby decelerating the vehicle. Driven by the rotor impeller, the working fluid in the working chamber enters the heat exchanger through the oil outlet of the retarder for oil-water heat exchange, and then flows back to the working chamber from the oil inlet, so that the heat energy of the working fluid is cooled by the engine co...

AI Technical Summary

Problems solved by technology

Its disadvantages are: 1. Since the oil tank directly communicates with the outer side of the sealing ring through the oil passage, when the hydraulic retarder starts to work, the pressure gas entering the fuel tank will enter the outer side of the sealing ring through the oil passage, making the outer side of the sealing ring The pressure of the oil tank is the same as that of the fuel tank, and the single sealing ring cannot seal in both directions. At this time, the gas outside the sealing ring will enter the working cavity inside the sealing ring, which will accelerate the damage of the sealing ring and reduce the life of the sealing ring.

2. After the gas in the fuel tank directly enters the working chamber, the mixed gas in the working chamber will increase, thereby reducing the braking torque of the hydraulic retarder and increasing the probability of the hydraulic retarder's exhaust gas injection

3. Since there is no sealing structure outside the oil return port, the oil leaked from the sealing ring can be directly discharged to the outside of the hydraulic retarder. As the oil is continuously discharged to the outside, the oil in the oil tank will continue to flow Decrease, so that the braking torque of the hydraulic retarder is continuously reduced until there is no retarding effect, and it also pollutes the environment

4. Since there is no sealing structure on the outside of the oil return port, when the hydraulic retarder starts to work, the pressure gas in the fuel tank will be continuously discharged to the outside through the oil return port, so that the pressure gas on the vehicle will continue to flow consumption, which is not conducive to the energy saving of the vehicle

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