Built-In Shock Absorber Valve Channels for Main Spool Balance
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Solution Overview
Problem
The existing damping valves for shock absorbers experience uneven stress due to radial fluid flow, leading to eccentricity and poor operational stability.
Innovation Solution
The internal damping valve design features a main spool with a feedback chamber and channels that direct fluid from outside the valve core to the feedback chamber, converting radial forces into axial forces and maintaining dynamic balance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If radial fluid flow is used in the main spool, then fluid can enter the valve chamber, but uneven stress occurs leading to eccentricity and poor operational stability
Solution Approach 1:
The patent introduces asymmetric compensation holes (through holes and blind holes) distributed at different positions and depths on the main spool. These holes create asymmetric fluid flow paths that generate compensating forces to counterbalance the uneven radial fluid stress, thereby eliminating eccentricity and improving operational stability while maintaining fluid flow functionality.
2Productivity
If radial fluid force acts on the main spool, then fluid enters the valve chamber, but dynamic balance is affected due to eccentricity
Solution Approach 1:
The compensation holes function as counterbalancing mechanisms by allowing fluid to enter specific regions of the main spool, creating pressure forces that oppose and neutralize the uneven radial fluid forces. This counterbalancing effect restores dynamic balance to the main spool while preserving the necessary fluid flow rate into the valve chamber.
3Ease of operation
If check valve opens radially, then fluid can flow into main spool, but fluid instability occurs affecting operational stability
Solution Approach 1:
The patent transitions the check valve opening direction from radial to axial dimension. The axial opening direction aligns with the main fluid flow direction, eliminating radial components that cause instability. This dimensional change ensures stable, laminar fluid flow into the main spool while maintaining ease of operation.
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 design reduces eccentricity and enhances the dynamic balance and operational stability of the main spool, improving the responsiveness and wear resistance of the damping valve.
Implementation Method 1
an electromagnetic drive component that drives the push rod to move up and down
Implementation Method 2
the damping valve regulates the pressure in a pilot valve chamber by adjusting the input current, thereby controlling the opening of a main spool
Data Source
AI summary
An internal damping valve for shock absorbers, comprising a main valve member, a valve housing, a valve sleeve and a main valve seat, the valve sleeve is connected with the valve housing, the main valve member is arranged in the valve sleeve, and the main valve seat is arranged at an end of the main valve member; the main valve member comprises a first channel, a second channel and a third channel; The third channel runs through the main spool, allowing fluid to enter the third channel from both directions. The fluid then passes through the third channel into a second oil flow path, subsequently flowing to the feedback chamber of the main spool. This reduces the eccentricity of the main spool caused by radial fluid entering unidirectionally, helping to maintain the relative balance of the main spool and improving the responsiveness and operational stability of the damping valve.