Excavator hydraulic system and excavator

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By introducing an automated venting system with flow sensors and control units into the hydraulic system, the problem of low venting efficiency during the initial startup of the excavator's hydraulic system has been solved, achieving efficient venting and safety detection, and improving the efficiency and safety of the excavator manufacturing process.

CN224315266UActive Publication Date: 2026-06-02DOOSAN INFRACORE (CHINA) CO LTD

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Patent Information

Application Number: CN202521442013.4
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2025-07-10
Publication Date: 2026-06-02
Estimated Expiration: 2035-07-10

Application Information

Patent Timeline

10 Jul 2025

Application

CN202521442013.4

02 Jun 2026

Publication

CN224315266U

IPC: F15B11/00; F15B19/00; F15B21/08; E02F9/22

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Application Domain

Fluid-pressure actuator testing Servomotors

Technology Topics

Hydraulic cylinder Flow transducer

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AI Technical Summary

Technical Problem

In existing technologies, the venting process of excavator hydraulic systems during initial startup is inefficient, leading to damage to the hydraulic system and preventing efficient gas discharge.

Method used

A flow sensor is used to detect the flow signal of hydraulic oil. Combined with a control unit and a display unit, automatic venting is achieved. It is connected to a hydraulic oil collection device through a connecting pipeline to automatically detect and display the venting results.

Benefits of technology

Automated venting of the hydraulic system has been achieved, improving venting efficiency, preventing damage to the hydraulic system, and ensuring safety and efficiency in the excavator manufacturing process.

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Abstract

The utility model provides an excavator hydraulic system and an excavator, and relates to the technical field of excavator manufacturing. The hydraulic system of the excavator comprises a hydraulic pipeline, a hydraulic cylinder and a hydraulic cylinder, one end of the communicating pipeline is communicated with the hydraulic pipeline, and the other end of the communicating pipeline is communicated with a hydraulic oil collecting device; a flow sensor is arranged on the communicating pipeline and is used for detecting a flow signal of hydraulic oil discharged from the hydraulic pipeline through the communicating pipeline; the control unit is electrically connected with the flow sensor, and the control unit obtains a flow signal of the flow sensor and obtains an exhaust detection result according to the flow signal; and the display unit is electrically connected with the control unit, and the display unit obtains the exhaust detection result from the control unit and displays the exhaust detection result. According to the scheme, the exhaust working efficiency of the hydraulic system can be improved.

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