Axial Gear Pump Adjusting Device for Pressure Pulsation Control
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Solution Overview
Problem
Existing gear pumps in vehicle oil circuits face reduced suction capacity and increased pressure pulsation amplitudes due to twisted or offset gears, leading to overloading of components like oil coolers and pressure relief valves.
Innovation Solution
A method and gear pump design where gears are arranged axially one behind the other, with an adjusting device that allows them to be rotated or displaced based on pressure conditions, using a spring element for prestressing and a fixing device to maintain alignment, optimizing operation by adjusting suction capacity and pressure pulsations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If the gears are arranged one behind the other in the axial direction to reduce pressure pulsation amplitudes, then the pressure pulsation amplitudes are reduced, but the suction capacity and delivery rate decrease
Solution Approach 1:
The patent applies the dynamics principle by making the gear arrangement adjustable rather than fixed. The gears can be dynamically repositioned between two extreme positions (aligned for maximum suction capacity, offset by half tooth pitch for minimum pressure pulsations) depending on operating conditions. This is achieved through an adjusting device that allows the gear train to be shifted axially, enabling the system to adapt its configuration in real-time to optimize performance for different operational requirements.
2Device complexity
If the gears are fixed in a specific position, then the structural simplicity is maintained, but the adaptability to different operating conditions is reduced
Solution Approach 1:
The patent transforms a static, simple structure into a dynamic system that can adapt to different operating conditions. The adjusting device, spring element, and fixing device work together to enable the gear train to be repositioned between aligned and offset configurations, allowing the pump to optimize its performance characteristics based on whether maximum delivery rate or minimum pressure pulsations are the priority for current operating conditions.
Solution Approach 2:
The patent changes the positional parameter of the gears relative to each other. By adjusting the axial position of the gear train, the system can switch between two distinct geometric configurations: gears aligned for maximum suction capacity and gears offset by half a tooth pitch for minimum pressure pulsation amplitudes. This parameter change enables adaptation to different operating requirements without fundamentally altering the pump's structure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design enhances the gear pump's suction force and delivery rate while minimizing pressure pulsation amplitudes, ensuring efficient oil circulation and component protection across varying operating conditions.
Implementation Method 1
The adjusting device has at least one spring element as a preload element by means of which the adjusting gear can be preloaded into a basic position
Data Source
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AI summary
The invention relates to a method for operating a gear pump, in particular for pumping engine oil in an oil circuit of a vehicle, wherein a pumping device is provided with at least two gears (11, 13, 47, 49) arranged in a housing (3), in particular externally toothed and/or designed as spur gears, wherein a fluid to be pumped can be pumped by means of the gears (11, 13, 47, 49) from at least one housing inlet (5) to at least one housing outlet (7), and wherein the gears (11, 13, 47, 49) are arranged one behind the other in the axial direction (x).According to the invention, an adjusting device (21) is provided by means of which the gears (11, 13, 47, 49) are rotated and/or displaced relative to each other depending on the pressure conditions inside the housing (3), in particular depending on the suction vacuum at the housing inlet (5) and/or depending on the liquid back pressure at the housing outlet (7).