Multi-Material Control Plate for Cavitation-Resistant Hydraulic Machines
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Solution Overview
Problem
Hydraulic machines experience cavitation damage to control plates, leading to premature wear and the need for frequent replacements, which is costly and inefficient.
Innovation Solution
A control plate with a body composed of a first polymer material and distinct sections made of a second polymer material, optimized for specific areas prone to cavitation, providing enhanced cavitation resistance and wear durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a control plate made of a single polymer material is used, then the manufacturing is simple and cost-effective, but the plate suffers from cavitation damage and has limited lifetime
Solution Approach 1:
The control plate employs a composite structure consisting of a first polymer material body with distinct sections made of a second polymer material. The second material is specifically positioned in regions susceptible to cavitation damage, providing enhanced resistance while maintaining the overall composite structure's manufacturability and cost-effectiveness.
Solution Approach 2:
Different sections of the control plate are assigned different material properties: the first polymer material provides general structural integrity and friction characteristics, while the second polymer material is strategically placed in high-cavitation-risk zones to provide localized cavitation resistance. This local differentiation optimizes performance without requiring the entire plate to be made of expensive specialized material.
2Reliability
If the control plate is made entirely of a material with high cavitation resistance, then the lifetime is extended, but the friction characteristics and structural properties are compromised
Solution Approach 1:
The control plate utilizes a composite structure where the first polymer material body provides optimal structural characteristics and friction properties, while distinct sections made of a second polymer material provide enhanced cavitation resistance. This composite approach allows each material to contribute its superior properties to the overall plate performance.
Solution Approach 2:
The first polymer material is used for the main body where structural strength and friction characteristics are critical, while the second polymer material is locally applied only in sections subjected to cavitation. This localized material assignment ensures that each material's superior properties are utilized where most needed without compromising overall performance.
3Reliability
If the control plate uses multiple materials in distinct sections, then the cavitation resistance is improved, but the manufacturing complexity increases
Solution Approach 1:
The second polymer material is strategically positioned only in distinct sections where cavitation damage is most likely to occur, rather than applying it uniformly throughout the entire control plate. This localized approach minimizes the complexity of the multi-material structure while maximizing cavitation resistance where it is most needed.
Solution Approach 2:
The control plate employs a composite structure where a first polymer material forms the base body and a second polymer material is integrated into distinct sections. This composite design balances manufacturing feasibility with enhanced cavitation resistance, avoiding the need for completely complex multi-material constructions.
Data Source
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AI summary
The present invention relates to a control plate (18) configured to equip a hydraulic machine (e.g. an axial piston machine or a pressure exchanger) for a hydraulic fluid, wherein the control plate (18) comprises a body (21) having an arrangement of passage openings (22, 23) for the passage of the hydraulic fluid and a contact face, wherein a whole thickness of the body (21) is formed of a main material, wherein the main material is a first polymer material. The objective of the present invention is to provide a control plate (18) having a good lifetime. This objective is solved by a control plate (18), wherein the body (21) comprises at least one distinct section which is made of a second polymer material (31), wherein the second polymer material (31) is different from the main material.