Internal engagement hydraulic motor capable of achieving four-quadrant operation

Abstract

The invention discloses an internal engagement hydraulic motor capable of achieving four-quadrant operation, and belongs to the technical field of medium delivery. A first pump and a second pump are arranged correspondingly, the two pumps are each internally provided with a symmetrical structure composed of a crescent plate, an inner gear ring, an outer gear and two oil ports, and a special oil drain hole and a special oil drain channel are formed in a rotating shaft correspondingly so that the internal engagement hydraulic motor can achieve four-quadrant operation under a pump mode and a motor mode, and hydraulic oil entering a bearing area along with the rotating shaft can be effectively drained. The internal engagement hydraulic motor is simple in structure, low in manufacturing cost and good in reliability, can effectively achieve four-quadrant operation, is high in functionality and wide in application range, and has good application prospects and popularization value.

Description

technical field [0001] The invention belongs to the technical field of medium conveying, and in particular relates to an internal meshing hydraulic motor capable of four-quadrant operation. Background technique [0002] In industrial production and daily life, hydraulic systems are widely used. In hydraulic systems, hydraulic pumps and hydraulic motors often play a very important role. Among them, the hydraulic pump is the power component of the hydraulic system, which is often driven by the engine or electric motor, sucks the oil from the hydraulic oil tank, forms pressure oil and sends it to the actuator; and the hydraulic motor is an actuator of the hydraulic system. The hydraulic pressure provided by the hydraulic pump can be transformed into the mechanical energy (torque and rotational speed) of its output shaft to correspondingly drive the corresponding components to complete the corresponding process. [0003] Generally, the hydraulic motor and the hydraulic pump ar...

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Problems solved by technology

[0004] At present, for the traditional internal meshing hydraulic motors, due to the limitations of the design of the oil drain channel and the crescent plate, most of the existing internal meshing hydraulic motors can only realize one-way operation, but cannot realize forward and reverse two-way operation , not to mention the ability to run the pump and the motor at the same time

Although an internal gear motor is disclosed in the existing patent application CN201610083566, it has the ability to work in the pump mode and the motor mode respectively by preferably setting the structure of the crescent plate, but the above internal gear motor The structure is complex, and it is necessary to set up large / small crescent plates to work together, and it is necessary to set up front / rear compensation discs to work accordingly. The overall control accuracy is poor, and there are too many intermediate compensation links, resulting in poor overall reliability; at the same time, There is no corresponding oil drain channel in the above gear motor structure, resulting in poor sealing of the above motor structure after long-term operation, there is a risk of oil leakage, the overall operation sealing and reliability are poor, and the four-quadrant cannot be fully satisfied Reliable operation needs, there are certain limitations, often can only work as a forward and reverse motor

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