Hydraulic Suction Pump for Tipper Lowering Speed
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Solution Overview
Problem
Existing hydraulic systems for tipper vehicles face limitations in lowering speed due to back pressure in the hydraulic connection, leading to unproductive periods and reduced productivity, as they struggle to efficiently control the lowering of the tipper body while maintaining safety and controllability.
Innovation Solution
The integration of a suction pump that supports the draining of hydraulic fluid, bypassing the tilting valve, and utilizing a jet pump to reduce effective dynamic pressure, allowing for a higher lowering speed and improved controllability, while maintaining compatibility with standard hydraulic components and systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If hydraulic fluid is drained through the tipping valve to maintain controllability, then fine control is maintained, but lowering speed is limited due to back pressure
Solution Approach 1:
The hydraulic system is segmented into two parallel pathways: one through the tipping valve for controlled drainage and another through the suction pump for rapid depressurization. This segmentation allows the system to achieve high lowering speed through the pump while maintaining fine control capability through the valve pathway.
Solution Approach 2:
The suction pump acts as an intermediary component that facilitates rapid hydraulic fluid drainage without requiring the main tipping valve to open fully. The pump mediates between the hydraulic cylinder and reservoir, providing a low-resistance pathway for fluid return while the tipping valve maintains its control function.
2Productivity
If larger-sized tilting valves are used to increase lowering speed, then productivity improves, but economic costs increase and unproductive periods remain
Solution Approach 1:
The mechanical valve-based flow control system is supplemented with a pump-based fluid transfer system. The suction pump replaces the need for oversized tilting valves by actively creating negative pressure to accelerate hydraulic fluid return, achieving high productivity without requiring larger, more expensive valve components.
Solution Approach 2:
The suction pump operates periodically or on-demand during the lowering cycle, providing bursts of rapid fluid drainage when high speed is needed, while allowing the tipping valve to maintain control during other phases. This periodic operation maximizes productivity without requiring continuous high-capacity valve opening.
3Speed
If bypass valve is opened to increase lowering speed, then productivity improves, but proportional controllability is lost
Solution Approach 1:
The system dynamically switches between two operational modes: controlled drainage through the tipping valve for precise positioning and rapid drainage through the suction pump for quick return. The suction pump's variable speed capability allows dynamic adjustment of drainage rate, providing both high speed and proportional control in different phases of the lowering operation.
Solution Approach 2:
The system uses feedback from the hydraulic cylinder pressure and position to control the suction pump operation. When rapid lowering is needed, the pump activates; when fine control is required, the pump modulates or deactivates and the tipping valve maintains control. This feedback mechanism ensures both high speed capability and proportional controllability are available as needed.
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 solution enhances the lowering speed of the tipper body, reduces unproductive periods, and increases productivity by minimizing the risk of overturning and exceeding permissible heights, while maintaining fine control and safety.
Implementation Method 1
a suction pump which supports the draining of the hydraulic fluid in the drain volume flow, via which at least a partial volume flow can be fed to the hydraulic sink
Implementation Method 2
The effective dynamic pressure in the hydraulic connection to the hydraulic sink can be reduced by means of the suction pump sucking in the hydraulic fluid of the discharge volume flow
Data Source
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AI summary
The present invention relates to a hydraulic system for tilting at least one tipper body located on a tipper vehicle, comprising at least one hydraulic cylinder (24) as a tilting drive unit for the tipper body, at least one tilting valve (18) for controlling at least one lifting operation and one holding operation of the hydraulic cylinder, at least one hydraulic sink (12) and at least one hydraulic source (16), as well as at least one valve (110) in hydraulic connection at least with the hydraulic cylinder (24) and the hydraulic sink (12), through which hydraulic fluid can be drained from the hydraulic cylinder (24) in a drain volume flow to the hydraulic sink (12) for a lowering operation of the hydraulic cylinder, bypassing the tilting valve (18).According to the invention, a suction pump (200) is provided to support the draining of the hydraulic fluid in the drain volume flow by bypassing the tilting valve (18), via which at least a partial volume flow of the drain volume flow can be supplied to the hydraulic sink (12).