A hydraulic retarder with a locking device and a control oil circuit that can eliminate blowing loss

Abstract

The invention discloses a hydraulic retarder with a locking device and a control oil path, which is capable of eliminating windage loss. The hydraulic retarder mainly comprises the locking device, an input half shaft which is fixedly connected with an outer ring of the locking device, a braking half shaft which is fixedly connected with an inner ring of the locking device, stators which are mounted in the input half shaft through bearings, rotors which are fixedly connected with the braking half shaft, a control oil path system which is communicated with an oil inlet passage of the locking device and oil inlets and oil outlets of the retarder stators, and a casing. When a vehicle normally runs, the locking device is separated, power cannot be transmitted to the braking half shaft from the input half shaft, and no windage loss is generated in the retarder; a hydraulic loop is controlled by closing and disconnecting the control oil path system, so that the condition whether the retarder works or not is controlled. According to the hydraulic retarder disclosed by the invention, not only the windage loss of the hydraulic retarder is eliminated, the power loss of an engine is reduced, but also the hydraulic retarder is simple in structure, stable and reliable in work and convenient to operate.

Description

technical field [0001] The invention belongs to the technical field of heavy-duty vehicles, and in particular relates to a hydraulic retarder with a locking device and a control oil circuit, which can eliminate blowing loss, and is used in an auxiliary braking system of a heavy-duty vehicle. Background technique [0002] The hydraulic retarder is an auxiliary braking system device for vehicles, which consists of two parts: a stator and a rotor. The rotation of the rotor drives the hydraulic rotation and impacts the stator, and the stator generates a reaction force on the rotor through the liquid, thereby hindering the rotation of the rotor. The hydraulic retarder converts the mechanical energy of the equipment into the thermal energy of the liquid, and dissipates it through the cooling system. [0003] Compared with other braking systems: the braking torque of the hydraulic retarder is proportional to the square of its rotational speed and the fifth power of the diameter of...

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Problems solved by technology

CN101239616A discloses a hydraulic retarder mechanism that can eliminate pump air loss. It adds a friction clutch device at the front end of the input shaft to realize the introduction and cut-off of the power source, but greatly increases the hydraulic retarder. The axial length increases certain difficulties for the arrangement of other components; CN202531689U discloses a hydraulic retarder, which adds a normal pressure synchronizer at the power input end and a set of shift fork system, which not only increases The axial length of the hydraulic retarder also makes the operating mechanism more complicated. At the same time, it has been proved by practice that the normal pressure synchronizer is prone to gearing during the synchronization process, and the work is unreliable.

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