Interchangeable Gear Pump Design for Simplified Maintenance
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Solution Overview
Problem
Existing gear pumps have a high number of spare parts, leading to high maintenance costs due to complex designs that require disassembly for routine maintenance tasks such as seal replacement and gear interchange.
Innovation Solution
A spur-toothed gear pump design with interchangeable drive and idler gears, where the drive shaft is sealed and connected via a coupling piece with complementary profiles, allowing for individual disassembly and maintenance without removing the gears, and featuring lubrication channels and sealing grooves for efficient maintenance access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional gear pump designs are used, then the pump can perform basic pumping functions, but the number of spare parts increases and maintenance costs increase
Solution Approach 1:
The drive gear and idle gear are designed with identical structures and interchangeable functions. Both gears can perform the same pumping action and can be replaced with either component, reducing the need for different types of spare parts and simplifying maintenance inventory.
Solution Approach 2:
The gear pump is divided into modular components with the drive shaft, seals, and gears designed as separate replaceable units. The seals are positioned to be accessible without removing the gears, and the drive shaft can be independently replaced, allowing segmented maintenance that reduces overall system complexity.
2Duration of action of stationary object
If traditional gear pump designs are used, then the pump can operate continuously, but maintenance requires complete disassembly increasing maintenance time
Solution Approach 1:
The seal assembly is designed as a separate, accessible component that can be replaced without removing the gears or other major components. The seal housing and drive shaft are configured to allow seal replacement through a simplified disassembly process, reducing maintenance time while preserving continuous operation capability.
Solution Approach 2:
The seal positioning and drive shaft configuration are designed in advance to facilitate easy access during maintenance. The seal is positioned in a location that becomes accessible when the pump is disassembled to the extent necessary for seal replacement, but not requiring complete gear removal, thus preparing the system for efficient maintenance.
3Ease of repair
If seals are designed to be replaceable without removing gears, then maintenance is simplified, but the seal design becomes more complex
Solution Approach 1:
The seal assembly is designed as a modular unit that can be independently accessed and replaced. The seal housing, drive shaft, and seal are configured as separate components that can be manipulated independently, allowing seal replacement without requiring gear removal while keeping the overall design relatively simple through clear functional separation.
Data Source
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Figure 3~4
AI summary
A gear pump comprising a housing (1) with a spur-toothed drive gear (4) and a spur-toothed idle gear (5) that are mounted rotatably around two parallel rotation axes within the housing (1) with bushings (8), a connecting flange (2) that is arranged on a first lateral side of the housing (1) in the direction of the axes, a cover (3) that is arranged on a second lateral side of the housing (1), opposite the connecting flange (2), a drive shaft (7) being rotatably mounted in the connecting flange (2) by at least one bearing (80) and being sealed against the connecting flange (2) by at least one shaft seal (9), wherein the drive shaft (7) being operatively connected to the drive gear (4) by a coupling piece (6), wherein the drive gear (4) and the idler gear (5) are identical.