Hydraulic Control Valve Block Layout for Compact Work Machines
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Solution Overview
Problem
Existing work machines face challenges in appropriately arranging multiple electromagnetic proportional control valves due to limited space on the vehicular body frame, which affects their efficiency and accessibility.
Innovation Solution
The work machine divides the electromagnetic proportional control valves into two separate blocks, allowing for individual arrangement and placement in smaller spaces, improving assemblability and maintainability while optimizing the control of hydraulic oil flow rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple electromagnetic proportional control valves are installed in a limited space, then the control precision of hydraulic cylinders is improved, but the arrangement difficulty and device complexity increase
Solution Approach 1:
The control valve system is segmented into multiple independent valve blocks, each housing one or more electromagnetic proportional control valves. This segmentation allows the valves to be distributed across different locations on the vehicular body frame, reducing arrangement difficulty while maintaining control precision for each hydraulic cylinder
2Measurement precision
If multiple electromagnetic proportional control valves are installed in a limited space, then the control precision of hydraulic cylinders is improved, but the accessibility for maintenance deteriorates
Solution Approach 1:
By dividing the control valves into separate valve blocks, each block can be positioned in accessible locations on the vehicular body frame. This segmentation enables maintenance personnel to access and service individual valve blocks without disassembling the entire control system, thereby maintaining ease of repair while achieving precise control
3Ease of repair
If multiple electromagnetic proportional control valves are arranged separately, then the accessibility and maintainability are improved, but the space occupation increases
Solution Approach 1:
Multiple electromagnetic proportional control valves are merged into integrated valve blocks that can be compactly arranged on the vehicular body frame. This merging reduces the total space occupation compared to completely separate valve installations, while the modular block structure maintains accessibility and ease of maintenance
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 enables efficient and flexible arrangement of multiple control valves, enhancing the machine's operational responsiveness and maintainability, and allows for precise control of hydraulic actuators, such as boom and arm movements.
Implementation Method 1
a pilot oil passage is provided with an electromagnetic proportional control valve configured to adjust a pressure of the pilot oil
Implementation Method 2
a plurality of direction control valves configured to supply a hydraulic oil to the hydraulic cylinders to operate the hydraulic cylinders
Data Source
AI summary
A plurality of electromagnetic proportional control valves are configured to control a pressure of a pilot oil generated by operation of a first control lever device and a second control lever device and, in accordance with the pressure of the pilot oil, adjust a flow rate of a hydraulic oil supplied to hydraulic cylinders. The plurality of electromagnetic proportional control valves are divided into a first valve block including at least one of the electromagnetic proportional control valves and a second valve block including at least one of the electromagnetic proportional control valves. The first valve block and the second valve block are arranged to be separated from each other.