Rotary Grinding Drive Shaft Cooling Lock for Overheat Protection
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Solution Overview
Problem
Current rotational atherectomy devices face issues with passive flushing fluid operation, leading to potential temperature increases in blood and vascular tissue, which can cause blood cell aggregation and vascular dysfunction due to manual confirmation failures and lack of timely cooling measures.
Innovation Solution
A driving device with a communication valve made of a material with a heat deformation temperature range of 130°C to 270°C, which locks the driving shaft when overheating to prevent continuous rotational atherectomy in the absence of cooling measures, ensuring the shaft does not rotate abnormally.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If manual operation is used to control flushing fluid flow, then device complexity is reduced, but reliability deteriorates due to potential human error and delayed response
Solution Approach 1:
The communication valve automatically detects cooling medium flow status and self-regulates the driving shaft rotation without human intervention. When cooling medium flow is insufficient, the valve body temperature rises and causes the valve to deform, automatically blocking the driving shaft. This self-service mechanism eliminates reliance on manual monitoring and control, resolving the contradiction between simple device structure and reliable cooling function.
2Ease of operation
If passive flushing fluid operation is used, then ease of operation is improved, but temperature control deteriorates leading to vascular dysfunction
Solution Approach 1:
The communication valve establishes a feedback loop where the valve body temperature (caused by friction between driving shaft and valve) serves as an indicator of cooling medium flow status. When cooling is insufficient, temperature rise deforms the valve to block rotation. This feedback mechanism automatically maintains temperature control without complex active operation, resolving the contradiction between ease of operation and temperature control.
Solution Approach 2:
The friction heat between the driving shaft and communication valve, which is normally a harmful effect to be avoided, is converted into a useful indicator. This heat causes the valve body temperature to rise, which deforms the valve to block the driving shaft when cooling is insufficient. The harmful heat becomes a beneficial signal for automatic safety protection, resolving the contradiction between passive operation and temperature control.
3Measurement precision
If manual confirmation of flushing fluid flow is required, then measurement precision is improved, but loss of time increases during surgical preparation
Solution Approach 1:
The communication valve automatically detects and confirms the flushing fluid flow status through temperature-based deformation, eliminating the need for manual confirmation. The valve itself serves as both the detection sensor and the response actuator, automatically blocking the driving shaft when flow is insufficient. This self-service mechanism eliminates time-consuming manual checks while maintaining accurate flow status detection, resolving the contradiction between measurement precision and time loss.
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
Prevents vascular dysfunction and patient injury by automatically stopping the driving shaft rotation when cooling fails, reducing the risk of blood cell coagulation and ensuring safe surgical conditions.
Implementation Method 1
the communication valve is made of a material with a heat deformation temperature in a range from 130°C to 270°C. When the cooling function fails... the temperature of the communication valve can quickly rise to the heat deformation temperature, such that the communication valve is deformed and bonded to the driving shaft as one piece
Data Source
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AI summary
A driving device and a rotary grinding apparatus, comprising: a mounting sleeve (100), an accommodating chamber (101) being axially formed in the mounting sleeve (100), and the two ends of the mounting sleeve (100) in the axial direction being respectively a driving end (110) and a connecting end (120); a driving shaft (200), passing through the accommodating chamber (101) in the axial direction and rotatable about the axis; and a communication valve (300), provided in the accommodating chamber (101), an input channel (301) and a cooling channel (302) penetrating through the communication valve (300) being formed inside the communication valve (300); one end of the input channel (301) being communicated with the cooling channel (302) and the other end being communicated with the outside to introduce a cooling medium; the cooling channel (302) being sleeved outside the driving shaft (200) in a clearance fit manner; and a first outlet (302a) and a second outlet (302b) being respectively formed on one side of the cooling channel (302) facing away from the driving end (110) and one side of the cooling channel (302) facing the driving end (110), and the first outlet (302a) being configured to output the cooling medium.