Cam Piston Pressure Compensator for Deep-Sea Sampling Stability
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Solution Overview
Problem
Existing active pressure compensation devices for deep-sea sampling have complex structures, large volumes, limited applicable pressures, and low safety, making them unsuitable for precise and reliable pressure maintenance during deep-sea sampling and transfer.
Innovation Solution
An active pressure compensator comprising a spring chamber, cam piston pump, and circuit chamber with integrated pressure sensor and control circuit board, which actively maintains pressure by detecting and adjusting liquid pressure using a cam piston pump to ensure stable pressure compensation for deep-sea sampling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing active pressure compensation devices are used, then pressure maintenance capability is improved, but device complexity increases
Solution Approach 1:
The patent combines the spring chamber, cam piston pump, and circuit chamber into an integrated pressure compensator system. The spring chamber provides pre-compressed spring force, the cam piston pump converts this force to hydraulic pressure, and the circuit chamber delivers compensated pressure to the sampling bottle, merging multiple functions into a compact unit that reduces overall system complexity.
Solution Approach 2:
The patent uses hydraulic principles with the cam piston pump that uses spring force to compress liquid and generate pressure. The pump chamber, piston, and liquid medium work together to convert mechanical spring energy into hydraulic pressure for active pressure compensation, eliminating complex mechanical transmission components.
2Measurement precision
If existing active pressure compensation devices are used, then pressure control precision is improved, but volume increases
Solution Approach 1:
The patent employs a nested structure where the piston moves within the pump chamber, which is contained within the circuit chamber assembly. The spring chamber integrates with the overall housing, creating a compact nested arrangement that minimizes device volume while maintaining precise pressure control through the piston's reciprocating motion.
Solution Approach 2:
The patent applies local quality by concentrating the pressure generation function in the compact cam piston pump chamber rather than distributing it across a large mechanical system. The spring force is locally applied to the piston, creating high pressure in a small volume, which achieves precise pressure control without increasing overall device size.
3Reliability
If existing active pressure compensation devices are used, then applicable pressure range is limited, but safety is improved
Solution Approach 1:
The patent uses a dynamic cam mechanism that can adjust the piston stroke and pumping rate to adapt to different pressure requirements. The cam profile can be modified to provide variable displacement, enabling the system to operate across a wide pressure range from shallow to deep sea conditions while maintaining safety through controlled pressure delivery.
Solution Approach 2:
The patent changes the spring pre-compression force parameter to adapt to different depth requirements. By adjusting the spring constant or pre-compression, the system can provide appropriate pressure compensation for various operating depths, expanding the applicable pressure range while the spring's elastic properties ensure safe operation within each range.
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 active pressure compensator provides a simple, compact structure capable of maintaining pressure up to 60 MPa, ensuring stable pressure for deep-sea sampling within a 6000-meter depth range with enhanced safety and adaptability, and integrating control, energy supply, and pressure measurement functions.
Implementation Method 1
the spring chamber is configured to provide liquid with a pressure higher than an environmental pressure by at least 0.5 MPa for the cam piston pump
Implementation Method 2
a cam piston pump connected to the spring chamber... the cam piston pump is configured to be capable of inhaling liquid from the spring chamber and pumping out liquid to the circuit chamber
Implementation Method 3
the circuit chamber is provided therein with a pressure sensor and a control circuit board connected in communication with the pressure sensor, the pressure sensor is configured to detect pressures of liquid output by the cam piston pump
Data Source
AI summary
An active pressure compensator for deep-sea sampling includes a spring chamber, a cam piston pump, and a circuit chamber; the spring chamber is configured to provide compensation liquid for the cam piston pump; the cam piston pump is configured to be able to draw liquid from the spring chamber and pump liquid to the circuit chamber; the circuit chamber is configured to be connected to a mechanism to be pressurized, and is provided therein with a pressure sensor and a control circuit board, the pressure sensor is configured to detect pressures of the compensation liquid from cam piston pump and the mechanism to be pressurized, the control circuit board is configured to control working of the cam piston pump based on pressure data feedback from the pressure sensor and thereby realize active pressure compensation for the mechanism to be pressurized. A pressure compensation method using the compensator is further provided.