Hydraulic Return-Discharge Layout for Stable Boom and Bucket Pressure
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Solution Overview
Problem
Existing hydraulic systems for working machines, such as skid steer loaders, face inefficiencies in fluid control and actuation due to the lack of effective return fluid management, leading to uneven operation and pressure imbalances between hydraulic actuators.
Innovation Solution
The hydraulic system incorporates a return-discharge fluid tube with a throttle and check valve configuration, allowing return fluid from the first hydraulic actuator to be supplied to the second control valve, which helps maintain consistent operation fluid flow and pressure by discharging excess fluid, thereby stabilizing the operation of the boom and bucket actuators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If return fluid is simply discharged without management, then the system structure is simple, but fluid pressure becomes unstable and operation becomes uneven
Solution Approach 1:
A throttle valve is introduced as an intermediary component in the return fluid discharge path. This throttle valve mediates between the return fluid from the first hydraulic actuator and the second hydraulic actuator, controlling the fluid flow to maintain pressure stability without requiring complex active control systems
Solution Approach 2:
The return fluid from the first hydraulic actuator is utilized to serve the second hydraulic actuator through the return-discharge fluid tube. This self-service mechanism allows the system to use its own waste fluid for useful purposes, maintaining pressure stability and improving efficiency without external intervention
2Reliability
If return fluid is supplied to second control valve without throttling, then fluid flow is high, but pressure becomes unstable and causes harmful effects
Solution Approach 1:
The potentially harmful high-pressure return fluid is converted into a beneficial resource by directing it through the return-discharge fluid tube to the second hydraulic actuator. The throttle valve then converts the harmful high pressure into beneficial controlled pressure, stabilizing the system rather than causing imbalance
Solution Approach 2:
The throttle valve changes the pressure parameter of the return fluid by introducing flow resistance. This parameter change transforms the unstable high-pressure return fluid into stable, controlled pressure suitable for the second hydraulic actuator, eliminating pressure imbalance
3Productivity
If no return-discharge path is provided, then the system structure is simple, but fluid flow consistency deteriorates
Solution Approach 1:
The return-discharge fluid tube serves multiple functions simultaneously: it provides a return path for fluid from the first hydraulic actuator, supplies fluid to the second hydraulic actuator, maintains pressure stability, and improves operation efficiency. This multi-functionality increases productivity without proportionally increasing complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enhances the operational efficiency and stability of the hydraulic system by ensuring consistent fluid flow and pressure, allowing for smoother and more controlled movement of the boom and bucket, improving overall machine performance.
Implementation Method 1
a throttle provided in the return-discharge fluid tube
Data Source
AI summary
A hydraulic system includes a hydraulic pump, a first hydraulic actuator, a second hydraulic actuator, a first control valve to control the first hydraulic actuator, a second control valve to control the second hydraulic actuator, a return fluid tube in which a return fluid discharged from the first hydraulic actuator flows, the return fluid tube connecting the first control valve and the first hydraulic actuator, a first inner fluid tube provided in the first control valve and connected to the return fluid tube, an outer fluid tube connected to the first inner fluid tube, the outer fluid tube connecting the first control valve and the second control valve, a return-discharge fluid tube to discharge the return fluid, the discharge fluid tube being branched from the outer fluid tube, and a throttle provided in the return-discharge fluid tube.