Hydrodynamic Retarder Suction Apparatus for No-Load Loss Reduction
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Solution Overview
Problem
Existing hydrodynamic machines, particularly retarders, face significant no-load losses due to residual torque transmission in the non-operating state, leading to increased fuel consumption and high energy consumption from additional measures to mitigate this issue.
Innovation Solution
A hydrodynamic machine with a suction apparatus integrated into the design, utilizing a blade wheel to create negative pressure in the working chamber during the non-operating state, eliminating the need for external pumps or suction cylinders by generating a conveying effect through blade arrangement and duct design to remove the working medium and air.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If additional measures such as external pumps or suction cylinders are used to empty the working chamber, then no-load losses are reduced, but device complexity and energy consumption increase
Solution Approach 1:
The suction apparatus is merged with the hydrodynamic machine by integrating the blade wheel directly into the existing structure. The blade wheel is arranged on the rear side of the primary wheel or secondary wheel, combining the torque transmission function with the suction function in a single integrated component, thereby reducing device complexity while maintaining energy efficiency
Solution Approach 2:
The blade wheel serves dual functions: it transmits torque between the primary and secondary wheels during operation, and simultaneously acts as a suction apparatus to empty the working chamber during non-operating states. This multi-functionality eliminates the need for separate external pumps or suction cylinders, reducing both device complexity and energy consumption
2Loss of energy
If external pumps or suction cylinders are used to create negative pressure, then no-load losses are reduced, but energy consumption increases
Solution Approach 1:
The hydrodynamic machine serves itself by using its own rotating blade wheel to create negative pressure and empty the working chamber. The blade wheel's rotation, driven by the primary or secondary wheel, automatically performs the suction function without requiring external energy input, making the system self-sufficient and energy-efficient
Solution Approach 2:
The blade wheel creates periodic suction action as it rotates, with blades passing sequentially past the duct opening to the working chamber. This periodic motion efficiently empties the chamber during non-operating states without requiring continuous energy input from external pumps
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 minimizes no-load losses with a simple constructional configuration and low energy consumption, effectively preventing torque transmission between the primary and secondary wheels during non-operating states.
Implementation Method 1
The blades of the blade wheel are arranged opposite of a duct in such a way that they generate a conveying effect during rotation of the blade wheel. This conveying effect ensures that a negative pressure is generated at the inlet end of the duct. As a result, working medium and/or air is pumped from the working chamber through the duct and out of the same by the rotation of the blade wheel of the suction apparatus.
Data Source
AI summary
The present invention relates to a hydrodynamic machine, especially a hydrodynamic retarder, including a bladed primary wheel and a bladed secondary wheel which are arranged opposite of each other axially with respect to their blade configurations such that they jointly form a working chamber. The working chamber can be filled with a working medium for one operating state in order to transmit torque from the primary wheel to the secondary wheel by means of a circulatory flow of the working medium. The working chamber can be emptied of the working medium for a non-operating state in order to prevent a transmission of torque from the primary wheel to the secondary wheel. A suction apparatus is connected with a fluidic connection to the working chamber in order to suck off working medium and/or air from the working chamber for forming a negative pressure in the working chamber in the non-operating state.