Modular Hydraulic Piston Sleeve for Low-Downtime Maintenance
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Solution Overview
Problem
Current hydraulic devices face inefficiencies and high maintenance costs due to dynamic torque changes, vibration, and noise issues, as well as downtime from component failures, particularly in axial piston pump designs.
Innovation Solution
A modular hydraulic device design featuring a housing with a receptacle, sleeve, and end cap, allowing for plug-and-play assembly of main pistons and cylinders, with aligned ports and bores for efficient fluid ingress and egress, and a cam mechanism for reciprocation, enabling flexible configuration and reduced downtime.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If variable angle rotating drive plates (wobble plate) are used to dynamically change fluid flow in response to changing torque conditions, then the hydraulic device can adapt to dynamic torque requirements, but mechanical complications increase, maintenance costs rise, and operational efficiency decreases
Solution Approach 1:
The hydraulic device is divided into modular components including a housing, a removable sleeve containing the piston assembly, and an end cap. This segmentation allows the piston assembly to be easily replaced without affecting other components, reducing maintenance complexity while maintaining operational adaptability.
Solution Approach 2:
The piston assembly incorporates a cam mechanism with adjustable cam profiles that can be dynamically changed to vary the displacement and flow characteristics. This allows the device to adapt to different torque conditions through simple cam selection rather than complex mechanical adjustments.
2Power
If axial piston pump designs are used, then hydraulic power transmission is achieved, but vibration and noise (fluidborne and structuralborne) are produced
Solution Approach 1:
The piston assembly is extracted as a separate, self-contained unit within the housing. This isolation allows for optimized piston-cylinder clearance and damping characteristics that reduce vibration and noise generation during hydraulic power transmission operations.
Solution Approach 2:
The housing and sleeve design incorporate damping features and compliant mounting arrangements that cushion vibrations before they propagate through the system. This prior cushioning reduces both fluidborne and structuralborne noise while maintaining effective power transmission.
3Reliability
If multi-piston/cylinder arrangements are used, then hydraulic system capability is increased, but downtime increases when damage occurs to one piston and/or cylinder
Solution Approach 1:
The multi-piston system is segmented into independent, identical modules each contained within its own sleeve. When one piston or cylinder is damaged, only that specific sleeve needs to be removed and replaced, while the other piston assemblies continue to operate, significantly reducing downtime.
Solution Approach 2:
The damaged piston assembly is quickly discarded by removing the entire sleeve as a unit, and a replacement sleeve is installed. This approach is more efficient than attempting to repair individual components within the assembly, reducing maintenance time while maintaining system reliability through redundancy.
4Reliability
If traditional hydraulic device designs are used, then hydraulic functions are performed, but plug and play ability for individual piston/cylinders is not available
Solution Approach 1:
The piston assembly is segmented into a self-contained module within the removable sleeve, featuring standardized connection interfaces with the housing. This modular design enables plug-and-play replacement where a damaged assembly can be quickly swapped out without complex disassembly or alignment procedures.
Solution Approach 2:
The sleeve design incorporates universal mounting features and standardized port configurations that allow the same sleeve assembly to be used across multiple positions or applications. This universality enhances both ease of repair and operational continuity by enabling rapid interchangeability.
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 modular design enhances operational efficiency, reduces maintenance costs, and minimizes downtime by allowing for easy replacement and reconfiguration of individual piston/cylinder units, while maintaining system integrity and reducing noise and vibration.
Implementation Method 1
hydraulic fluid with respect to the housing; a sleeve configured to be received in the first open end and abut the second end
Implementation Method 2
a main cylinder for holding a main piston for reciprocation about a reciprocation axis
Data Source
AI summary
A modular hydraulic device comprising: a housing having a receptacle having a first open end, a second end and a first port, the first port for facilitating an ingress and an egress of hydraulic fluid with respect to the housing; a sleeve configured to be received in the first open end and abut the second end; and an end cap for closing the first open end once the sleeve is inserted in the receptacle; the sleeve having: a body having a fourth lan (L4) positioned in the body for aligning with first port; a main cylinder for holding a main piston for reciprocation about a reciprocation axis; and a first bore portion fluidly coupled to the first lan, the first bore portion for receiving the ingress of the hydraulic fluid and for outputting the egress of the hydraulic fluid; wherein once assembled the main piston is coupled to a cam for facilitating said reciprocation.