Interchangeable Boom Sub Spool for Multi-Control Valve Circuits
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Solution Overview
Problem
Conventional multi-control valves for hydraulic excavators require replacement to switch between boom recycling and boom regeneration capabilities, as they are designed as distinct systems.
Innovation Solution
A multi-control valve design that includes an arm driving spool, a boom driving spool, and a housing with a slide hole for a boom sub spool, allowing the boom sub spool to function as either a recycling or regeneration spool, enabling both boom recycling and regeneration without replacing the valve.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multi-control valves for boom recycling and boom regeneration are designed as completely different systems, then each valve can be optimized for its specific function, but it becomes necessary to replace the entire multi-control valve to switch between functions
Solution Approach 1:
The multi-control valve is segmented into a housing and a removable spool assembly. The spool assembly can be extracted from the housing and replaced with a different spool assembly having different spools configured for different functions (boom recycling or boom regeneration). This allows functional optimization while avoiding complete valve replacement.
Solution Approach 2:
The housing is designed with universal features that can accommodate multiple types of spool assemblies. The housing includes a slide hole and passage structure that works with both boom recycling spools and boom regeneration spools, enabling one housing to support multiple functions through spool interchangeability.
2Adaptability or versatility
If a multi-control valve is designed to accommodate multiple spool types, then versatility is improved, but the housing structure becomes more complex
Solution Approach 1:
The housing incorporates universal elements including a standardized slide hole configuration and passage structure that can work with different spool types. This universal design enables spool interchangeability while keeping the housing structure relatively simple and manageable.
Solution Approach 2:
The spool assembly is designed as a nested component that fits within the housing. The spools are contained within the housing and can be inserted or removed through the slide hole, creating a nested structure that facilitates easy interchangeability without requiring complex housing modifications.
Data Source
AI summary
A housing of a multi-control valve includes an arm parallel passage, an arm crowding supply passage, an arm pushing supply passage, a boom parallel passage, a boom raising supply passage, and a boom lowering supply passage. The housing further includes: a slide hole; a head-side passage that is branched off from the boom raising supply passage and extends to the slide hole; a rod-side passage that is branched off from the boom lowering supply passage and extends to the slide hole; and a regeneration passage that extends from the slide hole to the arm parallel passage. The slide hole receives a boom sub spool therein. The boom sub spool is either a boom recycling spool or a boom regeneration spool.