Integrated Load-Sensing Valve Section for Compact Hydraulic Control
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Solution Overview
Problem
Existing load-sensing multi-way valve work sections have complex structural designs, leading to large volumes and high manufacturing costs, making them unsuitable for applications in narrow spaces with high power density requirements.
Innovation Solution
A simplified structural design for the load-sensing multi-way valve work section incorporating a compensation valve and a reversing valve with a feedback passage, shuttle valve, and specific spool configurations to control oil flow and pressure sensing, reducing volume and manufacturing costs while increasing power density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complicated structural design is adopted to realize desired functions, then the functional performance is improved, but the volume and manufacturing cost increase
Solution Approach 1:
The patent combines the compensation valve and reversing valve into a single integrated valve body, merging multiple functions into one compact structure. This reduces the overall volume while maintaining all necessary functions through shared components and integrated oil passage design.
Solution Approach 2:
The valve body serves multiple functions simultaneously: it houses both the compensation valve and reversing valve, provides load-sensing feedback through integrated pressure sensing openings, and manages oil flow distribution. This multi-functionality reduces the need for separate components, thereby reducing volume.
2Reliability
If a complicated structural design is adopted to realize desired functions, then the functional performance is improved, but the manufacturing cost increases
Solution Approach 1:
By merging the compensation valve and reversing valve into a single integrated assembly with a common valve body and shared oil passages, the patent reduces the number of separate parts that need to be manufactured and assembled, thereby lowering manufacturing complexity and cost.
Solution Approach 2:
The valve is segmented into functional modules (compensation valve section, reversing valve section, feedback passage) within a single integrated body, allowing for standardized manufacturing processes and easier quality control, which reduces overall manufacturing cost.
3Power
If a compact design is implemented to reduce volume, then the power density is improved, but the structural complexity may increase
Solution Approach 1:
The patent utilizes three-dimensional oil passage routing and spatial arrangement of components within the valve body to achieve compactness. By optimizing the spatial layout of oil passages and component positions, the design achieves high power density without requiring overly complex structural arrangements.
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
The solution enables a compact, cost-effective load-sensing multi-way valve work section that improves working performance and meets the requirements of proportional valve groups in small spaces, achieving independent pressure relief and efficient load-sensing functionality.
Implementation Method 1
the feedback passage being configured to communicate one of the first and second load-sensing feedback pressure sensing openings with the spring-side control chamber depending on a position of the reversing valve spool in the reversing valve bore
Implementation Method 2
with a compensation valve oil inlet chamber, a compensation valve oil outlet chamber, a spring-side control chamber and a springless-side control chamber all being formed inside the compensation valve bore
Implementation Method 3
the reversing valve spool being configured to control communications among a main oil inlet chamber, a first working oil chamber, a second working oil chamber, a first oil return chamber, a second oil return chamber
Data Source
AI summary
Disclosed is a load-sensing multi-way valve work section comprising a valve body, which comprises a compensation valve and a reversing valve both formed therein, wherein the compensation valve is provided with a compensation valve bore formed in the valve body and a compensation valve spool accommodated in the compensation valve bore, with a compensation valve oil inlet chamber, a compensation valve oil outlet chamber, a spring-side control chamber and a springless-side control chamber all being formed inside the compensation valve bore; wherein the reversing valve is provided with a reversing valve bore formed in the valve body and a reversing valve spool accommodated in the reversing valve bore, the reversing valve spool being configured to control communications among a main oil inlet chamber, a first working oil chamber, a second working oil chamber, a first oil return chamber, a second oil return chamber, a first load-sensing feedback pressure sensing opening and a second load-sensing feedback pressure sensing opening formed in the reversing valve bore, the compensation valve oil outlet chamber being communicated to the main oil inlet chamber; and wherein the load-sensing multi-way valve work section also defines a feedback passage formed within the valve body, the feedback passage being configured to communicate one of the first and second load-sensing feedback pressure sensing openings with the spring-side control chamber depending on a position of the reversing valve spool in the reversing valve bore.