Hydraulic Gear Machine Axial Force Compensation
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Solution Overview
Problem
Existing hydraulic gear machines apply high and uneven loads on housing covers and housings, leading to excessive wear due to the pressing together of gear wheels and bearing bodies.
Innovation Solution
A hydraulic gear machine design where counterforces equal to or less than the axial force components are applied to gear wheels and bearing shafts, reducing sliding friction and load on housing covers, with axial gap compensation and pressure fields used to minimize wear and load on the housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If counterforce is applied via pistons pressing the entire package onto the second housing cover, then the bearing bodies are secured against the gears, but very high and uneven loads occur on the housing cover and housing
Solution Approach 1:
The patent divides the counterforce application into two independent parts: one bearing body is secured hydraulically against the housing cover, while the other bearing body is secured mechanically against the gear. This segmentation distributes the loads separately, preventing the concentration of very high and uneven loads on the housing cover and housing that would occur if the entire package were pressed together as a single unit.
2Reliability
If high counterforce is applied to press bearing bodies against gears, then the gears are secured, but quite high wear occurs due to the pressing together of gear wheels and bearing bodies
Solution Approach 1:
The patent applies different securing methods to different bearing bodies based on their local requirements: one bearing body uses hydraulic pressure for axial positioning, while the other uses mechanical engagement. This local differentiation ensures that gears are securely held without applying excessive uniform pressure that would cause high wear between the gear wheels and bearing bodies.
3Manufacturing precision
If the entire package of bearing bodies and gears is pressed onto the second housing cover, then axial positioning is achieved, but the housing and housing cover are subjected to very high loads
Solution Approach 1:
The patent introduces a hydraulic pressure medium as an intermediary to achieve axial positioning. Instead of mechanically pressing the entire package onto the housing cover (which would create very high loads), the hydraulic pressure medium acts as a mediator that distributes the axial positioning force evenly across the bearing bodies, achieving precise positioning while keeping loads on the housing within acceptable limits.
4Force
If counterforce is applied to reduce load on housing cover, then housing loads are reduced, but sliding friction between gear wheels and bearing bodies increases
Solution Approach 1:
The patent employs dynamic axial positioning where bearing bodies can move axially within certain limits to automatically compensate for variations in gear dimensions and mounting positions. This dynamic adjustment maintains optimal contact pressure between gear wheels and bearing bodies, reducing sliding friction and energy loss, while the hydraulic counterforce system dynamically balances the loads on the housing cover.
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
The design reduces wear and load on machine elements by minimizing sliding friction and evenly distributing forces, resulting in a more efficient and durable gear machine operation.
Implementation Method 1
The counteracting force acting on the gear wheels and/or bearing shafts is preferably a hydraulic pressure force and/or a mechanical force
Implementation Method 2
The counterforce is applied to the first bearing body via a pressure field formed between the bearing body and the intermediate cover
Data Source
AI summary
The invention relates to a toothed wheel machine comprising a housing for receiving two meshing and especially helical-toothed wheels. Said toothed wheels are axially mounted in a sliding manner by axial surfaces between bearing bodies received in the housing, and radially by a bearing shaft received in the bearing bodies. During the operation of the toothed wheel machine, an axial component of a force resulting from the hydraulic and mechanical forces generated during operation acts on each toothed wheel in the same axial direction. A counter-force against the respective axial force component is applied to the toothed wheels and/or bearing shafts, each counter-force applying the same amount of pressure as the respective axial force component, or less than same.