Lubricant Reservoir Shutoff Valve Using Float-Actuated Refill Control
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Solution Overview
Problem
Lubricant reservoirs in machinery require frequent refilling and risk overfilling, leading to inefficiencies and potential damage due to the lack of automatic control mechanisms for lubricant flow.
Innovation Solution
An autofill shutoff valve system that includes a valve stem movable between refill and filled positions, automatically stopping lubricant flow when the reservoir is full, preventing overfilling and ensuring precise refilling based on lubricant levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual refilling of lubricant reservoir is used, then operational simplicity is maintained, but overfilling occurs and frequent refilling is required
Solution Approach 1:
The valve system automatically detects lubricant level and controls filling without external intervention. The actuator responds to lubricant level changes by automatically actuating the valve stem to open or close the flow path, eliminating the need for manual monitoring and control while preventing overfilling.
Solution Approach 2:
The actuator continuously monitors the lubricant level in the reservoir and provides feedback to the valve stem mechanism. When the lubricant reaches a predetermined level, the actuator detects this and automatically signals the valve to close, creating a closed-loop control system that prevents overfilling while maintaining simple operation.
2Quantity of substance
If frequent refilling is performed, then lubricant supply is maintained, but contamination risk increases and operational efficiency decreases
Solution Approach 1:
The valve system pre-establishes the optimal lubricant level in the reservoir before refilling is needed. By maintaining the reservoir at the correct level and automatically shutting off flow when full, the system eliminates the need for frequent manual refilling operations, thereby reducing contamination exposure and operational interruptions.
3Reliability
If automatic shutoff valve is implemented, then overfilling is prevented, but valve mechanism complexity increases
Solution Approach 1:
The actuator is designed to automatically respond to lubricant level changes without external control systems. The valve stem mechanism self-actuates based on the physical state of the lubricant level, using the lubricant's own presence or absence to trigger the opening or closing action, thereby achieving automatic control with minimal additional complexity.
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 autofill shutoff valve system ensures accurate refilling of lubricant reservoirs, reducing the frequency of refills, minimizing contamination, and preventing damage from overfilling, thereby enhancing the reliability and longevity of machinery components.
Implementation Method 1
The actuator is disposed in the housing and divides the housing into an upper portion and a lower portion, and the actuator is configured to shift upwards in response to a rising lubricant level within the lower portion
Data Source
Figure 1
Figure 2
Figure 3A
AI summary
An autofill shutoff valve includes a valve body mounted to a lubricant reservoir and secured to a fill tube extending into the reservoir. The autofill shutoff valve has a valve stem extending through the valve body and into the lubricant reservoir. The valve stem is actuated by a plate disposed within the reservoir from a first position, wherein lubricant flows from a lubricant inlet to a lubricant outlet through the valve body, to a second position, wherein the valve stem blocks the flow of lubricant through the valve body. The autofill shutoff valve provides lubricant directly to the reservoir, thereby eliminating external plumbing and the autofill shutoff valve also prevents overfill of the reservoir by cutting off the flow when the reservoir is full.