Dry Pump Purging via Higher-Pressure Gas Line
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Solution Overview
Problem
Laser machining devices using dry pumps face challenges in maintaining exhaust performance due to accumulated dirt, leading to decreased reliability and the need for frequent pump replacements, as there is no effective method to discharge accumulated dirt without periodic maintenance.
Innovation Solution
A laser machining device with a dry pump system that includes a second gas line supplying a higher-pressure gas to purge the dry pump, controlled by a valve system and a control unit to switch between the first and second gas flows based on timing, pressure, and operational states, allowing for periodic purging of accumulated dirt.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a dry pump is used to exhaust gas from the enclosure portion, then the pump avoids oil contamination and vapor entry into the medium gas, but dirt accumulates inside the pump over time leading to decreased exhaust performance and reliability
Solution Approach 1:
The patent implements periodic purging of the dry pump by switching the valve to connect the second gas source to the pump at predetermined intervals. This periodic action removes accumulated dirt before it significantly degrades pump performance, resolving the contradiction between avoiding oil contamination and maintaining reliable exhaust performance over time.
Solution Approach 2:
The system enables the dry pump to self-purge by using the second gas source to automatically clear accumulated dirt without requiring external maintenance intervention. The control unit monitors operating conditions and triggers purging when needed, allowing the pump to maintain its own performance.
2Ease of operation
If a dry pump is used without periodic maintenance, then the pump operates continuously without replacement of lubricant or filter, but there is no chance to discharge accumulated dirt leading to eventual failure
Solution Approach 1:
The dry pump performs self-maintenance through automated purging cycles triggered by the control unit based on operating time or performance degradation detection. This eliminates the need for manual maintenance while preventing dirt accumulation from causing failure.
Solution Approach 2:
The control unit monitors pump operating conditions and triggers purging when dirt accumulation is detected or after predetermined operating periods. This feedback mechanism ensures the pump maintains reliable performance without requiring manual intervention.
3Reliability
If the dry pump is replaced when exhaust performance decreases, then the pump reliability is restored, but the cost increases and operational time is lost
Solution Approach 1:
Instead of waiting for performance degradation to trigger replacement, the system performs periodic purging that prevents significant dirt accumulation. This maintains exhaust performance over extended periods, reducing replacement frequency and associated time losses.
Solution Approach 2:
The system performs purging actions before dirt accumulation significantly impacts pump performance. By proactively removing dirt during scheduled intervals, the pump maintains optimal exhaust performance and avoids premature replacement.
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 enables easy recovery of dry pump exhaust performance, extends the pump's operational life, and minimizes downtime by scheduled purging, preventing unnecessary interruptions during machining operations.
Implementation Method 1
a second line 64 that supplies a second gas N having a higher pressure than the first gas M to the dry pump 61
Data Source
AI summary
A laser machining device capable of recovering an exhaust performance of a dry pump easily is provided. A laser machining device includes: an oscillating portion that generates a machining laser beam G; an enclosure portion in which a first gas is enclosed; and an exhausting portion that exhausts the first gas together with a dirt generated in the enclosure portion in association with an operation of the oscillating portion. The exhausting portion includes: a dry pump; a first line that connects the enclosure portion and the dry pump; a second line that supplies a second gas having a higher pressure than the first gas to the dry pump; a valve portion that opens or closes the first line and the second line; and a control unit that controls opening or closing of the valve portion.