Low-noise bidirectional servo pump source

Abstract

The invention relates to a low-noise two-way servo pump source which comprises an oil tank, a pump source assembly, a valve control set, a hydraulic cylinder, a cooler and an oil return filter. The pump source assembly comprises a double-shaft-extension servo motor, a first hydraulic pump, a second hydraulic pump, a first clutch and a second clutch. The valve control sets comprise the first valve control set and the second valve control set, the hydraulic cylinder comprises a cylinder body and a piston, and the piston is slidably connected to an inner cavity of the cylinder body and divides the inner cavity of the cylinder body into a first cavity and a second cavity. Reciprocating motion of the hydraulic cylinder is achieved through forward rotation and reverse rotation alternate motion of the double-shaft-extension servo motor, the reciprocating motion speed of the hydraulic cylinder is achieved by adjusting the rotating speed of the double-shaft-extension servo motor, and therefore bidirectional speed regulation and direction control of the whole hydraulic transmission system are achieved. The device is simple in structure, low in noise, high in reliability and wide in speed regulation range.

Description

technical field [0001] The invention relates to the field of hydraulic systems, in particular to a low-noise bidirectional servo pump source. Background technique [0002] The role of the hydraulic system is to increase the force by changing the pressure. Hydraulic systems can be divided into two categories: hydraulic transmission systems and hydraulic control systems. The main function of the hydraulic transmission system is to transmit power and motion; the hydraulic control system must make the output of the hydraulic system meet specific performance requirements (especially dynamic performance). The hydraulic system usually refers to the hydraulic transmission system. [0003] There are generally two ways to achieve precise speed control in the existing hydraulic system: one is to use a valve-controlled system, which uses a one-way hydraulic pump as a power element. Since the motor speed is fixed, it is necessary to control the proportional valve or servo valve. The op...

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Problems solved by technology

[0003] There are generally two ways to achieve precise speed control in existing hydraulic systems: one is to use a valve-controlled system, which uses a one-way hydraulic pump as a power component. Since the motor speed is fixed, it needs to be controlled by a proportional valve or a servo valve. The opening of the opening realizes speed control, and a large hydraulic shock will be generated during the control process, resulting in large throttling noise and power loss; the second is to use a pump control system, which uses a two-way hydraulic pump as the power component, through the torque motor Or the hydraulic control valve (proportional valve, servo valve or switch valve, etc.) controls the swash plate of the two-way variable pump to achieve speed control, but the system configuration and control are more complicated, and it is difficult to use and maintain, and the two-way hydraulic pump is noisy. Generally not less than 70db (A), that is, the noise level is not less than 70 decibels (db), A refers to the sound power extreme

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