Hydraulic System Throttle Configuration for Simultaneous Actuator Control
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Solution Overview
Problem
The existing hydraulic systems for working machines face inefficiencies in fluid flow and pressure management, particularly when operating multiple hydraulic actuators simultaneously, leading to slow down or interruption in operations due to inadequate fluid return and supply pathways.
Innovation Solution
The hydraulic system incorporates a series of fluid tubes and throttles, including a first fluid tube for return fluid and a second fluid tube for operation fluid, with throttles of varying opening areas to manage fluid flow rates and pressures, ensuring efficient operation and smooth actuation of hydraulic actuators by maintaining high pressures and facilitating fluid return to downstream control valves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple hydraulic actuators are operated simultaneously using conventional hydraulic systems, then the system can perform multiple functions, but the fluid flow and pressure management becomes inadequate causing slow down or interruption in operations
Solution Approach 1:
The hydraulic system is segmented into multiple independent fluid pathways: a first fluid tube for return fluid from the first actuator to the second control valve, a second fluid tube for operation fluid from the first control valve to the second actuator, and a third fluid tube for discharge. This segmentation allows simultaneous operation of multiple actuators without fluid flow interference, resolving the contradiction between productivity and reliability.
Solution Approach 2:
Throttles are introduced as intermediary flow control devices in each fluid tube. The first throttle in the first fluid tube, the second throttle in the second fluid tube, and the third throttle in the third fluid tube act as mediators to regulate fluid flow rates and maintain pressure balance, ensuring reliable fluid management during simultaneous multi-actuator operation while preserving high productivity.
2Reliability
If conventional hydraulic systems are used with simple fluid pathways, then the system structure is simple, but fluid pressure cannot be maintained leading to actuator operation interruptions
Solution Approach 1:
Different fluid tubes are designed with different local qualities: the first fluid tube has a first throttle for return fluid management, the second fluid tube has a second throttle for operation fluid control, and the third fluid tube has a third throttle for discharge control. This local differentiation allows each tube to optimize pressure and flow for its specific function, ensuring continuous actuator operation while keeping the overall system structure manageable.
3Stress or pressure
If throttles with small opening areas are used to maintain high pressure, then fluid pressure is maintained, but fluid flow rate decreases causing slower actuator response
Solution Approach 1:
The system transitions from a single-dimension flow control approach to a multi-dimensional approach by creating separate fluid tubes for different flow directions (return fluid, operation fluid, discharge) with dedicated throttles in each. This dimensional separation allows each throttle to be optimized for its specific function without compromising overall system performance, maintaining high pressure while preserving actuator response speed through parallel flow pathways.
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 of hydraulic actuators by maintaining high fluid pressures and ensuring smooth operation, even when multiple actuators are in use, preventing slowdowns and interruptions, and allowing for simultaneous movement and operation of boom and bucket mechanisms.
Implementation Method 1
a first throttle disposed on the first fluid tube, and a second throttle disposed on the second fluid tube, the second throttle having an opening area smaller than an opening area of the first throttle
Data Source
AI summary
A hydraulic system for a working machine 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, and a discharge fluid tube in which the operation fluid flows. The discharge fluid tube is connected to the first control valve. The hydraulic system includes a first fluid tube in which a return fluid flows toward the second control valve. The first fluid tube couples the first control valve to the second control valve. The hydraulic system includes a second fluid tube coupling the first fluid tube and the discharge fluid tube, a first throttle disposed on the first fluid tube, and a second throttle disposed on the second fluid tube, the second throttle having an opening area smaller than an opening area of the first throttle.