Gas Density Relay Sealed Cabin for Anti-Vibration Accuracy
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Solution Overview
Problem
Current gas density monitors suffer from poor anti-vibration performance, low accuracy, and oil leakage issues, which affect their reliability and safety, especially in high-altitude environments and during sudden pressure changes.
Innovation Solution
A high anti-vibration gas density monitor design featuring a sealed cabin filled with anti-vibration oil or gas, with a signal control mechanism using a corrugated pipe and sealed compensation chambers, and an independent indication value display mechanism that includes a Bourdon tube and temperature compensation, ensuring accurate and reliable gas density monitoring without oil leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a micro switch with a contact operation arm is used in the gas density monitor, then the electrical performance is good, but the accuracy is low and the anti-vibration performance is poor due to fierce vibration of the contact operation arm
Solution Approach 1:
The patent extracts the contact operation arm from the system by using a magnetic field-driven movable core that can be actuated remotely through the enclosure wall. This eliminates the need for physical contact switches inside the enclosure, removing the source of vibration and improving both accuracy and anti-vibration performance while maintaining electrical performance through magnetic coupling.
Solution Approach 2:
The patent introduces a magnetic field as an intermediary to transmit the switching signal from the outside to the internal components. The movable core responds to external magnetic fields without physical contact, allowing the micro switch to be actuated remotely and eliminating vibration caused by mechanical contact operation arms.
2Measurement precision
If a displacement magnification mechanism is used to amplify the displacement of the Bourdon tube and temperature compensation element, then the sensitivity is improved, but the vibration displacement is also magnified and transmitted to the micro switch causing misoperation
Solution Approach 1:
The patent removes the displacement magnification mechanism entirely by using a magnetic field-driven movable core that can be actuated directly by external magnetic fields. This eliminates the chain of mechanical components that would amplify vibration, while maintaining sensitivity through the magnetic coupling between the external magnet and the movable core.
Solution Approach 2:
The patent replaces the mechanical displacement magnification mechanism with a magnetic field-based actuation system. The movable core responds to external magnetic fields without requiring mechanical amplification, thereby eliminating vibration amplification while maintaining the ability to detect and respond to gas density changes.
3Reliability
If anti-vibration oil is used to fill the enclosure, then the anti-vibration performance is improved, but oil leakage occurs over time affecting safety and reliability
Solution Approach 1:
The patent extracts the anti-vibration oil from the enclosure by designing a sealed structure that does not require oil filling. The sealed enclosure protects internal components from vibration without needing liquid damping agents, thereby eliminating the source of leakage while maintaining anti-vibration performance through structural design.
Solution Approach 2:
The patent replaces the maintenance-prone oil-filled system with a permanent sealed enclosure design. The sealed structure is designed to maintain its protective function throughout the device's service life without requiring periodic maintenance or replacement due to leakage.
4Temperature
If temperature compensation sheets are used to compensate the temperature of the display mechanism and control mechanism, then the temperature stability is improved, but high accuracy operation and display cannot be realized
Solution Approach 1:
The patent replaces the mechanical temperature compensation sheets with a magnetic field-based actuation system that is less sensitive to temperature variations. The movable core's magnetic properties and the external magnet's field remain relatively stable across temperature ranges, providing more accurate operation without requiring complex thermal compensation mechanisms.
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 design provides improved anti-vibration and electrical performance, high accuracy, and a long service life, preventing oil leakage and maintaining reliability across various conditions, including high altitudes and sudden pressure changes.
Implementation Method 1
the corrugated pipe is compressed or expanded to produce an axial displacement so as to drive the signal regulation mechanism
Implementation Method 2
When a gas density changes, a Bourdon tube and the temperature compensation element each generates a displacement
Implementation Method 3
a temperature compensation element, wherein one end of the Bourdon tube and one end of the temperature compensation element are both fixed to the end holder
Implementation Method 4
the sealed cabin is filled with anti-vibration oil or hermetically filled with gas
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
A high anti-vibration gas density monitor is provided, including a monitor enclosure, a signal control mechanism, and an indication value display mechanism independent from the signal control mechanism which are provided in the monitor enclosure. The signal control mechanism includes at least one corrugated pipe, a sealed compensation chamber, a signal generator, and a signal regulation mechanism. The corrugated pipe is perpendicular to a side wall of a control casing. The monitor enclosure includes an independent sealed cabin used to mount the indication value display mechanism. The sealed cabin is filled with anti-vibration oil, or is hermetically filled with gas. The indication value display mechanism includes a Bourdon tube, a base, an end holder, a movement, a pointer, and a dial. The high anti-vibration gas density relay of the present disclosure does not leak oil, and has excellent anti-vibration and electrical performance, high accuracy, a thin profile, and a long service life.