Pressure Transducer Adjustable Compensation Bore
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional pressure transducers face challenges in maintaining pressure compensation and protecting the pressure equalization device from contamination, especially in environments where pressure-tight lead-through devices are used, leading to issues with ambient pressure fluctuations and measurement accuracy.
Innovation Solution
A pressure transducer design featuring a bore through the wall with an adjustable pressure compensation device, allowing for targeted positioning and protection from contamination, eliminating the need for a rotatable electronics housing and simplifying the structure by integrating the electronics housing into the main housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pressure-tight lead-through devices are used, then pressure containment is improved, but pressure equalization capability deteriorates
Solution Approach 1:
The lead-through device is segmented into a pressure-tight sealing portion and a separate pressure equalization channel. The sealing portion contains glass or glass solder to prevent pressure leakage, while a dedicated equalization channel allows pressure balancing between the measurement chamber and ambient environment, resolving the contradiction between pressure containment and equalization capability
Solution Approach 2:
A pressure equalization membrane or flexible diaphragm is introduced as an intermediary element within the lead-through device. This membrane allows pressure equalization to occur while maintaining the pressure-tight seal, enabling both pressure containment and pressure equalization functions to coexist in the same device structure
2Ease of operation
If the pressure compensation device is exposed for positioning, then adjustability is improved, but contamination risk increases
Solution Approach 1:
The pressure compensation device is pre-positioned through a sealed access channel during manufacturing or initial setup. The sealed channel prevents contamination during operation, while the device remains adjustable through controlled means such as magnetic actuators or sealed mechanical interfaces that maintain the seal integrity throughout the adjustment process
Solution Approach 2:
A sealed access channel or protective barrier is introduced as an intermediary between the pressure compensation device and the external environment. This allows the device to be positioned and adjusted while preventing direct exposure to contaminants, resolving the contradiction between adjustability and contamination protection
3Adaptability or versatility
If a rotatable electronics housing is used, then positioning flexibility is improved, but device complexity increases
Solution Approach 1:
The electronics housing is merged with the process connection housing into a single integrated structure. This eliminates the need for separate rotatable housing mechanisms while maintaining positioning flexibility through the adjustable pressure compensation device and sealed access channels, resolving the contradiction between flexibility and 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
This design effectively compensates for ambient pressure fluctuations while protecting the pressure equalization device from contamination, enhancing measurement accuracy and simplifying manufacturing by eliminating the need for complex positioning measures and reducing the risk of dirt clogging.
Implementation Method 1
the pressure measuring cell has a membrane which is deflected under the influence of the pressure
Implementation Method 2
The pressure measuring cell interacts with a conversion unit which converts the mechanical signal, for example the deflection, into an electrical signal
Data Source
Figure 1
AI summary
The present invention relates to a pressure transmitter for determining a pressure in a component, comprising a housing (12) with a wall (14) enclosing a cavity (15), a pressure measuring cell (18) arranged in the cavity (15) for determining the pressure in the component and for generating corresponding signals, wherein the wall (14) has an opening (16) through which the pressure cell can be pressurized with the pressure in the component, and wherein the pressure measuring cell (18) is arranged in the cavity (15) such that a pressure chamber (33) is formed on the side of the pressure measuring cell (18) facing away from the opening (16), in which a second pressure is present, a conversion unit (28) cooperating with the pressure measuring cell (18) for converting the signals into electrical signals, and an electrical conduction device (30) for transmitting the electrical signals from the pressure measuring cell (18) to a Evaluation unit,and a pressure-tight feedthrough device for passing the electrical wiring device (30) through the wall (14), wherein a bore (42) through the wall (14) is provided, which communicates with the pressure chamber (33) and a pressure equalization device (44) whose position can be adjusted by means of an adjusting unit (46).