Ceramic Swash Plate Rotary Axial Piston Pump
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional rotary axial piston pumps (RAPPs) used in water hydraulic transport require ultra-fine filtration of water to prevent damage to polymeric surface features, leading to increased operational costs and reduced service life due to sensitivity to particulate matter.
Innovation Solution
The use of ceramic materials for internal components, such as the swash plate, rotor plate, stator plate, and slipper, which reduces friction and eliminates the need for ultra-fine filtration by providing a robust and durable surface that can withstand unfiltered water, thereby extending the service life and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If polymeric surface features are used on piston slippers to reduce friction, then friction reduction is improved, but sensitivity to particulate matter increases requiring ultra-fine filtration
Solution Approach 1:
The invention changes the material parameter of the swash plate from conventional metal to ceramic material. This material substitution fundamentally alters the friction characteristics and wear resistance, allowing the system to operate with unfiltered or minimally filtered water while maintaining low friction and high reliability, thereby resolving the contradiction between friction reduction and sensitivity to particulate matter
Solution Approach 2:
The invention employs ceramic materials (such as silicon carbide or aluminum oxide) for the swash plate, representing a composite or advanced material solution. These ceramic materials provide both the low-friction surface needed for reduced friction and the hardness/wear resistance needed to withstand unfiltered water conditions, simultaneously addressing both requirements of the contradiction
2Duration of action of stationary object
If ultra-fine filtration is implemented to protect polymeric surface features, then service life is improved, but operational costs increase
Solution Approach 1:
By changing the material parameter of the swash plate to ceramic, the system achieves extended service life without requiring ultra-fine filtration. The ceramic material's inherent wear resistance and hardness allow direct operation with unfiltered water, eliminating filtration infrastructure costs while maintaining prolonged operational lifespan
Solution Approach 2:
The invention effectively replaces the need for expensive filtration systems with a durable ceramic component that can withstand unfiltered water. The ceramic swash plate acts as a robust, long-lasting element that eliminates the need for costly filtration infrastructure and its associated operational expenses
3Ease of manufacture
If conventional metallic components are used in water hydraulic applications, then manufacturing simplicity is maintained, but friction and wear increase reducing service life
Solution Approach 1:
The invention changes the material parameter from conventional metal to ceramic, fundamentally improving friction reduction and wear resistance properties. This material substitution enables the swash plate to operate effectively in water hydraulic applications with unfiltered water, achieving both low friction and extended service life while maintaining manufacturing feasibility through established ceramic forming and sintering processes
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 ceramic components in RAPPs enhance friction reduction and durability, allowing for extended service life without the need for high-level water filtration, resulting in cost savings and broader operational flexibility.
Implementation Method 1
The slipper(s) further include a swash plate interface surface that is in contact with the swash plate inclined surface and that is formed from a ceramic material
Data Source
AI summary
RAPPs comprise a housing, a swash plate with an inclined surface, and a rotor assembly positioned adjacent the swash plate. The swash plate and/or the inclined surface are ceramic. The rotor assembly comprises a rotor-drum having at least one cylinder bore having a piston disposed therein, wherein the piston has a ball-shaped end. A slipper is interposed between the swash plate and the rotor-drum, and includes a socket joint for accommodating the piston ball-shaped end therein. A plastic material may be disposed within the socket joint. The slipper has a ceramic interface surface in contact with the inclined surface. A stator plate is positioned in the housing, and a rotor plate is interposed between the stator plate and the rotor-drum. The stator plate has a ceramic interface surface in contact with the rotor plate. The rotor plate has a ceramic interface surface in contact with the stator plate.