Piston Bladder With Protective Sleeve for Pump Flow and Life
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Solution Overview
Problem
Existing piston designs for pumps with housing diameters of D23-D29 mm are inadequate, leading to low flow and short service life due to improper structural parameters.
Innovation Solution
A piston design comprising a cylindrical piston bladder with specific dimensions (inner diameter of 9.2±0.5 mm, depth of 3.8±0.5 mm, and wall thickness of 0.5±0.3 mm) and a protective sleeve, along with a solid body and connecting rod, optimized for improved performance and assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional piston structural parameters are used, then the pump can be manufactured with standard components, but the flow is low and service life is short
Solution Approach 1:
The patent applies parameter changes by optimizing specific dimensional parameters of the piston bladder (inner diameter of 9.2±0.5 mm, depth of 3.8±0.5 mm, wall thickness of 0.5±0.3 mm) to achieve both improved flow performance and extended service life. This resolves the contradiction by finding the optimal parameter values that simultaneously improve productivity and reliability.
Solution Approach 2:
The patent applies local quality by creating a protective sleeve structure at the outer circumferential surface of the piston bladder where it connects to the base plate. This localized structural enhancement improves wear resistance and durability at the critical connection area, thereby extending service life without compromising the overall flow performance.
2Strength
If the piston bladder wall thickness is increased, then the structural strength is improved, but the chamber volume decreases reducing flow
Solution Approach 1:
The patent optimizes the wall thickness parameter to 0.5±0.3 mm, which provides sufficient structural strength while maintaining adequate chamber volume for flow. This optimal parameter selection resolves the contradiction between strength and productivity by finding the minimum sufficient thickness that satisfies both requirements.
Solution Approach 2:
The patent adds a protective sleeve structure that extends radially outward from the piston bladder at the base plate connection area. This dimensional extension provides additional structural reinforcement without increasing the chamber wall thickness, thereby maintaining flow capacity while improving strength at the critical connection zone.
3Ease of operation
If multiple piston bladders are connected in parallel, then the driving is easier and assembly is simplified, but the structural complexity increases
Solution Approach 1:
The patent divides the piston into multiple independent piston bladders connected in parallel to the base plate. This segmentation allows each bladder to be driven independently, simplifying the driving mechanism and enabling easier control. The modular structure also facilitates assembly and disassembly operations.
Solution Approach 2:
The patent merges multiple piston bladders into a single integrated piston assembly that shares a common base plate. This combining approach simplifies the overall structure by reducing the number of separate components and assembly steps, while maintaining the benefits of parallel-driven individual bladders.
Data Source
AI summary
A piston for a pump and a pump are provided. A piston bladder (2) of the piston is cylindrical in shape, a chamber (20) is a cylindrical chamber, the chamber (20) has as inner diameter of 9.2±0.5 mm, the chamber (20) has a depth of 3.8±0.5 mm, the piston bladder (2) has a wall with a thickness of 0.5±0.3 mm, and the piston bladder (2) has an outer circumferential surface, a part of the outer circumferential surface connected to a base plate (1) protrudes outwards radially to form a protective sleeve (21).