Dual Mass Flywheel Axial Displacement Limiting Mechanism
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Solution Overview
Problem
Existing dual mass flywheels face issues with axial displacement of flywheels during operation, assembly, and disassembly, leading to potential damage of elastic sealing washers due to the high weight and vibration of the flywheels, which are not adequately addressed by existing solutions.
Innovation Solution
Incorporating complementary stops on the flywheel hubs with an annular ring that is axially movable within a groove, allowing it to limit axial displacement between flywheels, thereby preventing washer degradation and ensuring secure assembly and operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If elastic sealing washers are used to center the torsion damper, then the torsion damper can be centered with respect to the primary flywheel, but axial displacement of the flywheels can cause degradation of the sealing washers
Solution Approach 1:
The patent applies preliminary action by equipping the flywheel hubs with stops before assembly or operation. These stops are pre-positioned to prevent excessive axial displacement during manipulation and assembly, thereby protecting the sealing washers from degradation before the damage can occur.
Solution Approach 2:
The stops on the flywheel hubs act as a protective measure in advance. They limit the axial displacement to a safe range, cushioning the sealing washers from the harmful effects of excessive displacement during flywheel manipulation or assembly operations.
2Adaptability or versatility
If the flywheels are designed to be axially flexible, then they can accommodate vibrations and movements, but the sealing washers may be damaged due to uncontrolled axial displacement
Solution Approach 1:
The patent changes the parameter of axial displacement by introducing stops that define a maximum allowable displacement range. This allows the flywheels to maintain their axial flexibility for vibration accommodation while constraining the displacement within safe limits to protect the sealing washers.
3Ease of operation
If the axial displacement is not limited during manipulation and assembly, then the flywheels can be easily handled, but the sealing washers may degrade due to tilt or movement
Solution Approach 1:
The stops are incorporated into the flywheel hub design before assembly operations. This preliminary provision ensures that even during manipulation and assembly, the axial displacement is automatically limited, protecting the sealing washers without complicating the assembly process.
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 effectively limits axial displacement to 1 mm, preventing damage to sealing washers during operation and manipulation, ensuring the flywheels remain securely aligned and preventing washer degradation.
Implementation Method 1
limit the axial displacement of one flywheel relative to the other by abutment of the annular ring against the side walls of the groove of said other flywheel
Implementation Method 2
the torsion damper being centered with respect to the primary flywheel by means of elastic sealing washers
Implementation Method 3
a torsion damper mounted between the primary and secondary flywheels to transmit rotational torque between the flywheels and to absorb and dampen vibrations and rotational acyclics
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The damping flywheel (1) has a primary flywheel (2) i.e. axially flexible flywheel, including a radially internal hub (4) provided with a groove (21) in which an annular elastic split-ring (22) is fixed. A secondary flywheel (3) has a hub (12) provided with another groove (23) in which the ring is partially inserted and axially displaced to limit axial displacement of the secondary flywheel with respect to the primary flywheel by abutment of the ring against side walls of the groove of the secondary flywheel. A torsion damper is arranged between the flywheels.