Hydrodynamic Coupling Pressure Control With Swirl Retarding
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Solution Overview
Problem
In hydrodynamic coupling arrangements, the absence of a dividing wall leads to pressure medium being acted upon by different rotational speeds in the pressure space and toroidal space, causing unwanted axial displacement of the piston during clutch engagement or disengagement, making clean engagement problematic due to varying pressure differences.
Innovation Solution
A retarding device with swirl blading is introduced to influence the flow of pressure medium, retarding its rotational speed to approximate the output speed, ensuring comparable rotational speeds on both sides of the piston, thus preventing operational pressure differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a dividing wall is used to separate pressure space and toroidal space, then rotational speed uniformity is improved, but device complexity and axial dimension increase
Solution Approach 1:
The patent removes the dividing wall from the housing, extracting the problematic component that caused increased complexity and axial dimension. Instead of using a physical divider, the invention relies on the retarding device to control pressure medium flow and rotational speed, achieving the same stability goal with fewer parts.
Solution Approach 2:
The retarding device acts as an intermediary element that mediates between the pressure medium flow and the piston rotation. It controls the rotational speed of pressure medium in the pressure space without requiring a physical dividing wall, thus maintaining stability while reducing complexity.
2Stability of the object's composition
If a dividing wall is used to separate pressure space and toroidal space, then rotational speed uniformity is improved, but axial dimension increases
Solution Approach 1:
The dividing wall is completely removed from the housing structure. This extraction eliminates the additional axial dimension that the wall would require, while the retarding device provides the necessary rotational speed control without increasing axial length.
3Device complexity
If the receiving area and through-opening area are fixed to the housing, then structural simplicity is maintained, but piston engagement becomes problematic due to pressure differences
Solution Approach 1:
The receiving area and through-opening area are made rotatable relative to the housing, connected via the retarding device. This dynamic configuration allows the system to adapt rotational speeds to maintain pressure balance during piston engagement, improving reliability while the overall structure remains relatively simple.
Solution Approach 2:
The retarding device changes the rotational speed parameter of the pressure medium flowing through the receiving area and through-opening area. By adjusting this parameter, the system maintains comparable pressures on both sides of the piston during engagement, ensuring clean operation.
4Device complexity
If pressure medium is acted upon by different rotational speeds in pressure space and toroidal space, then structural compactness is achieved, but unwanted axial displacement occurs
Solution Approach 1:
The retarding device serves as an intermediary that controls the pressure medium flow between the toroidal space and pressure space. It equalizes rotational speeds by regulating flow, preventing unwanted axial displacement while maintaining the compact structure without a dividing wall.
Solution Approach 2:
The retarding device changes the rotational speed parameter of pressure medium in the pressure space to match that in the toroidal space. This parameter adjustment prevents pressure differences that would cause axial displacement, ensuring reliable piston engagement while keeping the structure compact.
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 ensures unproblematic engagement or disengagement of the piston by maintaining comparable rotational speeds and pressures on both sides, allowing for efficient axial displacement with a low pressure application, thereby preventing unwanted axial displacements and ensuring a clean engagement process.
Implementation Method 1
a retarding device with swirl blading (16) is introduced to influence the flow of pressure medium, retarding its rotational speed to approximate the output speed
Implementation Method 2
a pressure space (40), which is sealed by a piston (39) of a clutch device (44) at least substantially relative to a toroidal space (41)
Data Source
AI summary
A hydrodynamic coupling arrangement has a housing connected to pressure medium lines for conducting pressure medium into or out of a pressure space sealed by a piston of a clutch device relative to a toroidal space of a hydrodynamic circuit provided in the housing. A rotatable area is provided for axially displaceably receiving a radially inner piston hub of the piston of the clutch device, and at least one through-opening which is rotatable relative to the housing is provided in a through-opening area for producing at least one flow connection between at least one pressure medium line and the pressure space. The receiving area and the through-opening area are in rotational communication with a retarding device influencing a flow of pressure medium in the pressure space, this flow of pressure medium arriving in the pressure space after passing through the through-opening area.