Gear Pump Mechanical Drive Pinion Separation
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Solution Overview
Problem
Existing gear pumps face inefficiencies in hydraulic drive due to the dual role of mechanical drive and hydraulic pumping elements, leading to suboptimal performance and fluid leaks between stages, especially in self-driven gear pumps with lobed and toothed pinions.
Innovation Solution
The design separates mechanical drive pinions and hydraulic pumping elements on each shaft, allowing for distinct profiles and orientations to optimize performance, with hydraulic elements having different radial projections and materials, and angular adjustments to enhance efficiency and prevent fluid leaks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If lobed and toothed pinions are used for mechanical drive, then mechanical drive performance is improved, but hydraulic efficiency deteriorates and fluid leaks occur
Solution Approach 1:
The pinion is segmented into two distinct functional parts: a mechanical drive portion with teeth for transmitting torque, and a hydraulic pumping portion with lobes for fluid displacement. This segmentation allows each part to be optimized for its specific function without compromise, resolving the contradiction between mechanical drive performance and hydraulic efficiency
Solution Approach 2:
Different regions of the pinion structure are given different geometric qualities - the outer peripheral region has teeth optimized for mechanical engagement, while the inner region has lobes optimized for hydraulic pumping. This local differentiation enables simultaneous optimization of both mechanical drive and hydraulic functions
2Duration of action of moving object
If multiple stages of lobed and toothed pinions are interlaced, then mechanical drive continuity is improved, but device complexity increases and fluid leaks between stages occur
Solution Approach 1:
The multi-lobe pinion design allows a single pinion structure to perform both mechanical drive transmission and hydraulic pumping functions simultaneously. This multi-functionality eliminates the need for separate mechanical drive stages and hydraulic pumping stages, reducing overall device complexity while maintaining continuous operation
Solution Approach 2:
The mechanical drive function and hydraulic pumping function are merged into a single integrated pinion structure. The teeth and lobes work together in the same component, eliminating the need for multiple separate stages and reducing complexity while ensuring continuous mechanical drive and fluid displacement
Data Source
Figure 1
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AI summary
The invention relates to a gear pump (1) comprising a pumping chamber (2) in which a first shaft (8) and a second shaft (9) are rotated about their respective axes (D8, D9), each of the first and second shafts (8, 9) supporting at least one hydraulic-pumping element (20) that hydraulically pumps a fluid in the pumping chamber (2), said at least one hydraulic-pumping element (20) of each of said first and second shafts (8, 9) being positioned in said pumping chamber (2) and each having at least one first radial projection (21). In the pumping chamber (2), each of said first and second shafts (8, 9) further supports at least one mechanical drive pinion (14) that rotates each of said first and second shafts (8, 9), each mechanical drive pinion (14) having second radial projections (15). Said at least one mechanical drive pinion (14) is separate from said at least one hydraulic-pumping element (20), and the number of said at least one first radial projection (21) and of said second radial projections (15) is different.