Hydrostatic Vertical Support for Rotating Shafts
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Solution Overview
Problem
Current vertical support devices for rotating shafts face challenges in managing strong axial loads, eccentricities, and dynamic imbalances, particularly at high speeds, with high energy dissipation and unsuitability for loads exceeding tens of tons, and are not cost-effective.
Innovation Solution
A vertical support device utilizing a hydrostatic system with a rotating and floating plate, magnetic oil, and a cooling circuit, featuring a hemispherical cap and bearing track configuration that maintains an oil separating film for low energy dispersion, capable of supporting high loads with minimal energy loss and adaptability to resonant frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional sliding and rolling systems are used for supporting rotating shafts, then the structure is simple and manufacturing cost is low, but energy dissipation is high and they are unsuitable for strong axial loads exceeding tens of tons
Solution Approach 1:
The patent employs a hydrostatic bearing system that uses pressurized fluid (oil) to support the rotating shaft. The fluid pressure generates a lifting force that counteracts strong axial loads, enabling the system to handle loads exceeding tens of tons while maintaining low energy dissipation through fluid film separation between bearing surfaces.
Solution Approach 2:
The invention changes the operating parameters by introducing pressurized fluid into the bearing system, transforming it from a contact-based mechanical support to a fluid-film-based hydrostatic support. This parameter change enables simultaneous achievement of high load capacity and low energy dissipation.
2Loss of energy
If active magnetic bearing systems are used for high speeds, then energy dissipation is reduced and there is absence of contact between parts, but manufacturing cost is high and they are complex
Solution Approach 1:
The patent uses a hydrostatic bearing system with fluid pressure generation instead of complex magnetic field systems. The bearing consists of simple components including a bearing surface, fluid supply system, and pressure regulation mechanism, achieving low energy dissipation without the complexity of active magnetic bearings.
3Loss of energy
If conventional hydrostatic supports are used, then energy dissipation is reduced, but they are unsuitable for supporting eccentric and unbalanced loads
Solution Approach 1:
The patent employs a dynamic hydrostatic bearing system where the fluid pressure distribution automatically adapts to eccentric and unbalanced loads. The bearing design includes features that allow the fluid film to redistribute pressure dynamically, maintaining stable support under varying load conditions including eccentricities and vibrational imbalances.
Solution Approach 2:
The invention changes the fluid pressure parameters dynamically to accommodate eccentric loads. The pressurized fluid system adjusts pressure distribution across the bearing surface in response to load variations, enabling the support of unbalanced and eccentric loads while maintaining low energy dissipation.
4Productivity
If bearing systems are designed for high speeds between 100 and 3000 rpm, then productivity is improved, but they pass over resonant frequencies causing increased vibration and energy dissipation
Solution Approach 1:
The hydrostatic bearing system uses pressurized fluid to create a damping effect that reduces vibrations during passage through resonant frequencies. The fluid film acts as a shock absorber, maintaining stable operation at high speeds between 100 and 3000 rpm while minimizing energy dissipation during resonant transitions.
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 solution enables efficient support of vertical loads with reduced energy dissipation, maintaining low energy consumption and operational costs, even under high eccentricities and vibrational imbalances, while ensuring mechanical integrity and safety through a dual hydrostatic and mechanical bearing system.
Implementation Method 1
a vertical support device utilizing a hydrostatic system with a rotating and floating plate, magnetic oil, and a cooling circuit, featuring a hemispherical cap and bearing track configuration that maintains an oil separating film for low energy dispersion
Implementation Method 2
A vertical support device utilizing a hydrostatic system with a rotating and floating plate, magnetic oil, and a cooling circuit
Implementation Method 3
A vertical support device utilizing a hydrostatic system with a rotating and floating plate, magnetic oil, and a cooling circuit
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
A vertical support device with reduced energy dissipation for rotating shafts comprising a spherical end portion (2) having radius (r), adapted to be rigidly constrained to a rotating vertical shaft, coupled with a rotating and floating plate (3) bearing a hemispherical cap (4), which identifies a complementary concave seat having radius (r) for the spherical end portion (2), also comprising a bearing track (5) for bearing a load (K) that rests on the rotating and floating plate (3), wherein the rotating and floating plate (3), the hemispherical cap (4) and the bearing track (5) are arranged coaxial to a housing hollow body (9) and have an axial hole (33, 51) for the passage of pressurised feed oil for the hydrostatic bearing of the spherical end portion (2), an oil separating film being arranged between the conjugated tracks arranged between the rotating and floating plate (3) and the bearing track (5) as well as between the hemispherical cap (4) and the spherical end portion (2), wherein the rotating and floating plate (3) has maximum outer radius (de/2) greater than the radius of curvature (r) of the spherical end portion (2), the support device also comprising at least one cooling circuit for cooling the bearing track (5).