Self-suction type oil pump used for hydraulic retarder

Abstract

The invention discloses a self-suction type oil pump used for a hydraulic retarder. The self-suction type oil pump comprises a pump body and an impeller (3) arranged in the pump body. The pump body is formed by connecting a first shell (1) and a second shell (2) which are oppositely arranged. The first shell (1) is provided with an oil inlet hole (1.1). The second shell (2) is provided with an oil outlet hole (2.1). After the first shell (1) and the second shell (2) are connected, a circular cavity (4) containing the impeller (3) and an oil way (5) through which the oil inlet hole (1.1) communicates with the oil outlet hole (2.1) are formed. A boss (6) protruding out of the circumferential wall is arranged on the circumferential wall of the part, between the oil inlet hole (1.1) and the oil outlet hole (2.1), of the circular cavity (4). The protruding face of the boss (6) is a concave arc face (6.1) coaxial with the impeller (3). After the structure is adopted, the self-suction type oil pump used for the hydraulic retarder is high in work efficiency and good in self-suction effect.

Description

technical field [0001] The invention relates to the field of hydraulic retarders, in particular to a self-priming oil pump used in hydraulic retarders. Background technique [0002] Hydraulic retarder is an auxiliary braking device for automobiles, which is mainly used in large passenger cars, urban public transport vehicles, heavy trucks and military vehicles; Accelerators have become a trend. [0003] The main shaft is an important part of the hydraulic retarder, which plays the role of transmitting the braking force of the hydraulic retarder to the automobile gearbox. When the hydraulic retarder is in a non-working state, its main shaft also runs with the main shaft of the gearbox, so the oil suction pump needs to be sucked up from the oil chamber of the hydraulic retarder, and then transmitted to the outside for lubrication and other parts , such as bearings, oil seals. However, the oil suction pump in the prior art is not provided with a blocking structure to prevent...

AI Technical Summary

Problems solved by technology

However, the oil suction pump in the prior art is not provided with a blocking structure to prevent gas circulation between the oil inlet hole and the oil outlet hole, which will cause the following disadvantages: when the oil suction pump exhausts in the early stage of oil suction, the gas will circulate in the oil chamber, As a result, the gas discharge time is long, resulting in slower oil absorption speed and poor self-absorption effect

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