Hydrodynamic Coupling Pre-Chamber Inlet Channels
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Solution Overview
Problem
Hydrodynamic couplings are complex and expensive to manufacture, with electronic components being prone to failure and requiring power, leading to high starting torque and prolonged starting processes.
Innovation Solution
The hydrodynamic coupling connects the antechamber to the working chamber via multiple radially spaced inlet channels or a slot-shaped inlet channel, allowing the working fluid's volume flow to adjust based on the fill level, reducing the starting torque and increasing the load torque, while maintaining a compact and inexpensive design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If electronic actuators and control units are used to adjust the inlet channel flow cross section, then the volume flow of working fluid can be controlled, but the device complexity increases and manufacturing cost increases
Solution Approach 1:
The patent removes electronic actuators and control units from the system, replacing them with a purely mechanical solution. The inlet channel's flow cross-section is adjusted passively through the centrifugal action of the rotating working fluid, eliminating complex electronic components while maintaining volume flow control capability.
Solution Approach 2:
The system uses the working fluid's own centrifugal force during rotation to automatically adjust the flow cross-section of the inlet channel. The rotating fluid level itself controls the opening area, creating a self-regulating mechanism that requires no external control systems.
2Adaptability or versatility
If electronic actuators are used to control the inlet channel, then volume flow can be adjusted, but reliability decreases due to susceptibility to failure and power requirements
Solution Approach 1:
The patent eliminates electronic actuators and control units from the system, replacing them with a purely mechanical solution. The inlet channel's flow cross-section is adjusted passively through the centrifugal action of the rotating working fluid, eliminating complex electronic components while maintaining volume flow control capability.
Solution Approach 2:
The system uses the working fluid's own centrifugal force during rotation to automatically adjust the flow cross-section of the inlet channel. The rotating fluid level itself controls the opening area, creating a self-regulating mechanism that requires no external control systems.
3Ease of manufacture
If a single large inlet channel is used, then the structure is simple, but the starting torque is too high and the starting process is prolonged
Solution Approach 1:
The patent divides the single inlet channel into multiple separate inlet channels (typically three). This segmentation allows the flow cross-section to be dynamically adjusted as the working fluid level changes during rotation, enabling the system to provide high starting torque when needed while maintaining structural simplicity.
4Ease of manufacture
If the inlet channel flow cross section is fixed, then the structure is simple, but the torque characteristics cannot be precisely controlled
Solution Approach 1:
The patent divides the single inlet channel into multiple separate inlet channels (typically three). This segmentation allows the flow cross-section to be dynamically adjusted as the working fluid level changes during rotation, enabling the system to provide high starting torque when needed while maintaining structural simplicity.
Solution Approach 2:
The patent transforms the fixed geometric inlet channel into a dynamic flow control system. The effective flow cross-section varies automatically with the working fluid level during rotation, allowing the torque characteristics to be precisely controlled without complex adjustable mechanisms.
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 provides a maintenance-free hydrodynamic clutch with controlled torque characteristics, reducing the maximum starting torque and prolonging the starting process, while ensuring a high load torque can be overcome, and allowing for precise determination of the torque curve through geometric variations in inlet channels.
Implementation Method 1
During operation, the working fluid is pressed against the radial outer wall of the antechamber due to the acting centrifugal forces
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
A bladed external gear (5) and a shell (6) form a working chamber (8). The bladed internal gear (10) moves relative to the external gear (5). The shell is arranged rotatably about the rotational axis (L). A pre-chamber (13) is rotationally fixed to external gear. The working chamber is connected to a radially outer region of pre-chamber through an inlet channel (16) and a radially inner region of pre-chamber via a return channel (14). The pre-chamber is connected with the working chamber through two radially spaced-apart inlet channels (15,16) and/or slot-shaped inlet channel.