Geared Hydraulic Machine Coupling Design
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Solution Overview
Problem
High pressure differences in geared hydraulic machines cause deformation and misalignment of components, leading to reduced efficiency and shortened lifespan, with existing solutions being complex and costly.
Innovation Solution
The use of abutments and sunken seatings, along with friction-coupled plugs, to stabilize the coupling between the body and cover, reducing deformation and misalignment while simplifying assembly and reducing component count.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If screws or bolts are used to fix the cover to the body, then the assembly is secure, but the manufacturing complexity and cost increase
Solution Approach 1:
The invention extracts the fastening function from the cover-body coupling and relocates it to the gear shafts, which naturally pass through the cover. This eliminates the need for separate screws or bolts, reducing assembly complexity while maintaining coupling strength through the gear shafts themselves serving as the fastening elements.
Solution Approach 2:
The gear shafts serve dual functions: transmitting rotational motion and providing the fastening function to secure the cover to the body. This multi-functionality eliminates the need for dedicated fastening components, reducing device complexity while maintaining structural integrity.
2Manufacturing precision
If blocking pins are used to couple the body and cover, then positioning is improved, but assembly time increases
Solution Approach 1:
The invention removes the blocking pins entirely and integrates the positioning function into the gear shaft design. The gear shafts' geometric features (such as tapered ends or keyed connections) provide inherent positioning precision during assembly, eliminating the time-consuming process of inserting and securing separate blocking pins.
Solution Approach 2:
The positioning features are pre-integrated into the gear shaft design, so that positioning precision is achieved automatically during the natural assembly sequence without requiring separate positioning steps or additional components like blocking pins.
3Stability of the object's composition
If non-circular edges and recesses are used for coupling, then deformation is opposed, but manufacturing complexity increases
Solution Approach 1:
The invention extracts the deformation resistance function from the cover-body coupling interface and relocates it to the gear shaft design. The gear shafts are designed with features (such as rigid construction, proper material selection, and geometric reinforcement) that inherently resist deformation, eliminating the need for complex non-circular coupling features.
Solution Approach 2:
Instead of making the entire cover-body coupling complex with non-circular features, the invention applies localized reinforcement and rigid design principles specifically to the gear shaft regions where deformation resistance is most critical, maintaining manufacturing simplicity in other areas.
4Strength
If multiple fastening components are used, then structural integrity is improved, but assembly labor increases
Solution Approach 1:
The gear shafts serve multiple functions simultaneously: transmitting rotational motion, providing structural support, and acting as the fastening mechanism to secure the cover to the body. This consolidation of functions into single components maintains structural integrity while dramatically simplifying assembly operations.
Solution Approach 2:
The invention merges the fastening function with the gear shaft assembly, combining what were previously separate functions (motion transmission and structural fastening) into a single integrated component system, thereby reducing the number of assembly steps and improving ease of operation.
Data Source
AI summary
A geared hydraulic machine destined to function as a pump or a motor, comprising at least a module (1) comprising a body (10) in which two chambers are afforded, which two chambers intersect, and each of which contains a gear (12, 13) which enmeshes with a gear (12, 13) contained in the other chamber, the body (10) having at least an open end that is closed by a cover (20) comprising at least a seating (21, 22) for a support bearing (210, 220) of at least a gear (12, 13) of the gears; the coupling between the body (10) and the cover (20) comprises at least two abutments (23, 24) which are fashioned in one of the body (10) and the cover (20), each of which abutments (23, 24) is housed in a respective sunken seating (16, 17) which is afforded in the other of the body (10) and the cover (20).