Hydraulic Ride Control Valve for Boom Vibration Suppression
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Solution Overview
Problem
Existing hydraulic systems for work machines face challenges in effectively controlling boom cylinder pressure fluctuations, leading to vibrations during travel, and require improved ride control and leveling operations.
Innovation Solution
A hydraulic system incorporating a first and second hydraulic cylinder, control valves, a bucket positioning valve, an accumulator, and a ride control valve, which includes a spool configuration to manage fluid flow between the accumulator and fluid chambers of the boom cylinder, allowing for efficient anti-vibration and leveling operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional hydraulic system is used without ride control, then the system structure is simple, but boom cylinder pressure fluctuations cause machine vibrations during travel
Solution Approach 1:
The patent introduces a ride control valve as an intermediary component between the boom cylinder and the hydraulic system. This valve mediates the pressure fluctuations in the boom cylinder during travel, suppressing vibrations without requiring complete redesign of the entire hydraulic system. The ride control valve acts as a buffer that absorbs pressure variations while maintaining the overall simplicity of the hydraulic architecture.
Solution Approach 2:
The hydraulic system is segmented into distinct functional zones: the main hydraulic system for boom operation and a separate ride control subsystem. The ride control valve isolates the pressure fluctuation management function from the main hydraulic circuit, allowing independent optimization of vibration suppression without affecting the core hydraulic operations. This segmentation enables targeted solution to the vibration problem while preserving system simplicity.
2Stability of the object's composition
If ride control is implemented to suppress boom cylinder pressure fluctuations, then machine vibrations are reduced, but the hydraulic system complexity increases
Solution Approach 1:
The ride control valve serves as a mediator that stabilizes boom cylinder pressure during travel operations. It is integrated into the existing hydraulic circuit at a strategic point, allowing pressure stabilization without requiring complete system redesign. The valve mediates between the pump output and the boom cylinder, smoothing pressure fluctuations while maintaining compatibility with the original hydraulic architecture.
Solution Approach 2:
The ride control valve is designed to perform multiple functions: it suppresses vibrations during travel, maintains pressure stability during leveling operations, and integrates with the existing hydraulic circuit without requiring separate dedicated systems. This multi-functionality reduces the need for additional specialized components, thereby limiting the increase in system complexity while achieving pressure stability.
3Ease of operation
If the discharge control valve is opened during leveling operation, then the second hydraulic cylinder can rotate the bucket, but pressure fluctuations in the boom cylinder may occur
Solution Approach 1:
The ride control valve acts as an intermediary that buffers the impact of discharge control valve operations on boom cylinder pressure. When the discharge control valve opens to enable bucket rotation, the ride control valve mediates the resulting pressure changes, preventing direct transmission of fluctuations to the boom cylinder. This intermediary function allows ease of operation while maintaining pressure stability.
Solution Approach 2:
The ride control valve provides beforehand cushioning by being pre-positioned in the hydraulic circuit to absorb and dampen pressure fluctuations before they reach the boom cylinder. During leveling operations when the discharge control valve opens, the ride control valve is already in place to cushion the pressure impact, preventing instability in the boom cylinder pressure while allowing smooth bucket rotation.
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 system effectively suppresses boom cylinder pressure fluctuations, reducing machine vibrations and enabling precise leveling and anti-vibration operations, enhancing the operational stability and control of work machines.
Implementation Method 1
an accumulator, an accumulator control valve, a discharge fluid path, and a discharge control valve. The accumulator is connected to the first fluid path via an accumulator path
Data Source
AI summary
A hydraulic system for a work machine includes a first control cylinder to move a boom and a second control cylinder to move a bucket. A body of the first control cylinder has a first fluid chamber and a second fluid chamber. A first control valve is connected to the first fluid chamber via a first fluid path and connected to the second fluid chamber via a second fluid path to control the first hydraulic cylinder. A bucket positioning valve is connected to the second fluid path and a third fluid path to control a second hydraulic cylinder so as to rotate the bucket. A discharge fluid path is connected to the second fluid path between the bucket positioning valve and the first control valve. A discharge control valve is provided in the discharge fluid path to be opened and closed.