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, resulting in large volume 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, featuring a valve body with a compensation valve and a reversing valve, including specific chambers and passages that allow for efficient communication and pressure sensing, reducing volume and manufacturing costs while increasing power density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a complicated structural design is adopted to realize desired functions, then the functional completeness is improved, but the volume and manufacturing cost increase
Solution Approach 1:
The patent combines multiple valve functions (reversing valve, compensation valve, safety valve, one-way valve, and shuttle valve) into a single integrated work section structure. The valve body integrates multiple chambers (main oil inlet chamber, working oil chambers, oil return chambers, control chambers) and passages (feedback passages, communication passages) that work together to achieve compound movements of multiple hydraulic actuators simultaneously, thereby reducing overall volume while maintaining functional completeness.
Solution Approach 2:
The work section is designed as a multifunctional integrated valve that can control multiple hydraulic actuators with different movement directions and speeds. The single work section structure serves multiple purposes: reversing oil flow direction, compensating pressure variations, providing safety relief, enabling load-sensing feedback, and controlling compound movements, thus eliminating the need for separate valves for each function.
2Adaptability or versatility
If a complicated structural design is adopted to realize desired functions, then the functional completeness is improved, but the manufacturing cost increases
Solution Approach 1:
By merging multiple valve functions into a single integrated work section, the patent reduces the total number of parts that need to be manufactured, assembled, and sealed. The integrated structure with unified valve body, chambers, and passages simplifies the manufacturing process compared to assembling multiple separate valves, thereby reducing manufacturing cost while maintaining full functionality.
3Volume of stationary object
If a simplified structural design is adopted, then the volume and manufacturing cost are reduced, but the power density may be compromised
Solution Approach 1:
The patent utilizes three-dimensional spatial arrangement of chambers and passages within the valve body to achieve high power density in a compact volume. The main oil inlet chamber, working oil chambers, and control chambers are arranged in different spatial dimensions with efficient communication passages connecting them, allowing multiple hydraulic circuits to be controlled simultaneously without increasing overall valve volume proportionally.
Solution Approach 2:
The work section employs a nested structure where control chambers are positioned within or adjacent to working oil chambers, and feedback passages are integrated within the valve body structure. The spring-side control chamber and springless-side control chamber are arranged to efficiently utilize available space, with communication passages routed through existing structural elements, thereby maximizing power density within the compact integrated design.
Data Source
Figure 1~2
Figure 3A~3B
Figure 3C~3D
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.