Vibration Isolation Holder With Regulated Clamping Force
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Solution Overview
Problem
Existing vibration isolation methods for cartridges in turbochargers face challenges in achieving both sufficient stability and effective vibration isolation, particularly in limited working spaces, due to variations in elastic characteristics and limited clamping force, which can lead to inaccurate grinding information and defective products.
Innovation Solution
A vibration isolation holding device with a body portion, an abutment member, a biasing member, and regulating portions that regulate the position of the abutment member to ensure a consistent clamping force and vibration isolation, using a flexible biasing member that maintains a compact size and stable operation even with high elasticity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a clamping method is used to support the cartridge from both sides by pressing two housing members against the bearing housing, then productivity is improved by reducing fastening/removing work, but stability in supporting the cartridge deteriorates and vibration characteristics change
Solution Approach 1:
The housing members are made movable along the axial direction of the rotor, allowing dynamic adjustment of the clamping position. This enables the clamping method to maintain stability while preserving productivity benefits, as the housing members can adapt to variations in cartridge dimensions and positioning.
Solution Approach 2:
The guide portions are configured to change the movable range of the housing members based on the manner of contact between the bearing housing and housing members. By adjusting the movable range parameter, the system optimizes both stability and productivity for different contact conditions without requiring re-clamping operations.
2Reliability
If the pressing force (clamping force) applied to the bearing housing by the two housing members is increased, then stability in supporting the cartridge is improved, but the strength of the cartridge is exceeded and vibration isolation is compromised
Solution Approach 1:
Vibration isolation members are selectively placed at specific local positions where the housing members contact the bearing housing. This localized vibration isolation allows sufficient clamping force to be applied for stability while preventing excessive force transmission that would compromise cartridge strength or induce unwanted vibrations.
Solution Approach 2:
Vibration isolation members are introduced as intermediary elements between the housing members and the bearing housing. These intermediaries distribute and moderate the clamping force, ensuring stable support without exceeding the cartridge's strength limits or generating harmful vibrations.
3Object-affected harmful factors
If a vibration isolation member with higher elasticity is used to achieve good vibration isolation, then vibration isolation property is improved, but the clamping force is insufficient and stability deteriorates
Solution Approach 1:
Multiple vibration isolation members with different elastic characteristics are used at different local positions. This allows the system to optimize vibration isolation at contact points while maintaining sufficient overall clamping force for stable cartridge support.
Solution Approach 2:
The vibration isolation system uses composite arrangements of multiple elastic members rather than a single high-elasticity member. This composite structure balances vibration isolation capabilities with sufficient clamping force generation.
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 device provides stable holding and effective vibration isolation while maintaining a compact size, allowing for reliable operation in limited spaces and preventing excessive deformation, thus enhancing productivity and accuracy in unbalance detection.
Implementation Method 1
a biasing member disposed between the body portion and the abutment member
Implementation Method 2
a vibration isolation holding device for holding a cartridge, which includes a rotor having a wheel and a rotational shaft, a bearing for supporting the rotor rotatably, and a bearing housing for housing the bearing, while isolating an external vibration
Data Source
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AI summary
A vibration isolation holding device includes a body portion and an abutment member. The abutment member is arranged between the body portion and a bearing housing, and has an abutment surface abutting on the bearing housing, when a cartridge is held. A biasing member is disposed between the abutment member and the body portion. An interval between the body portion and the abutment member is regulated by a first regulating portion to be shorter than a natural length of the biasing member.