Hydraulic Gas Compressor Stroke Sensing via Cover-Mounted Detector
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Solution Overview
Problem
Conventional hydraulically driven gas compressors are limited in their ability to detect the stroke of the hydraulic piston accurately, as position sensors are typically mounted to the hydraulic cylinder tube, allowing only detection of the piston's position relative to the sensor.
Innovation Solution
The gas compressor design includes a position detector mounted to the second hydraulic cover, which faces the hydraulic piston, allowing precise detection of the piston's stroke through a magnetostrictive linear sensor or alternative sensors like a laser sensor or infrared sensor, coupled with pressure sensors to monitor chamber pressures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the position sensor is mounted to the hydraulic cylinder tube, then the sensor can detect the piston position, but the sensor cannot accurately detect the stroke of the hydraulic piston
Solution Approach 1:
The patent introduces a magnetic field as an intermediary between the position sensor and the hydraulic piston. A magnet is attached to the piston, and the sensor detects the magnet's position through the hydraulic oil medium, enabling accurate stroke detection without direct contact or mounting on the cylinder tube.
Solution Approach 2:
The patent replaces the conventional mechanical position sensor mounting system with a magnetic field-based detection system. Instead of mechanically mounting the sensor to the cylinder tube, a magnet is attached to the piston and the sensor detects its position through magnetic field interaction, eliminating the need for direct mechanical connection.
2Measurement precision
If high-temperature, high-pressure resistant sensors are used to detect chamber pressures, then accurate pressure detection is achieved, but the device complexity and cost increase
Solution Approach 1:
The patent introduces magnetic coupling as an intermediary mechanism that allows the position sensor to detect piston position through the hydraulic oil medium without direct contact. This eliminates the need for the sensor to withstand high temperatures and pressures directly, as the magnetic field penetrates the medium without being affected by extreme conditions.
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
Enables accurate detection of hydraulic piston stroke and chamber pressures without the need for high-temperature, high-pressure resistant sensors, facilitating stable gas compression and reduced installation space requirements.
Implementation Method 1
a position detector that is mounted to the second hydraulic cover and that detects a position of the hydraulic piston
Implementation Method 2
alternative sensors like a laser sensor or infrared sensor
Implementation Method 3
alternative sensors like a laser sensor or infrared sensor
Data Source
Figure 1
AI summary
A gas compressor (1) according to one embodiment includes a gas cylinder (3A) and a hydraulic cylinder (4A). The gas cylinder (3A) includes a gas cylinder tube (31), a gas cover (32), and a gas piston (33). The gas piston (33) forms a compression chamber (3a) between the gas piston (33) and the gas cover (32). The hydraulic cylinder (4A) includes a hydraulic cylinder tube (41), a first hydraulic cover (42), a second hydraulic cover (43), and a hydraulic piston (44). The hydraulic piston (44) forms a first driving chamber (4a) between the hydraulic piston (44) and the first hydraulic cover (42), and forms a second driving chamber (4b) between the hydraulic piston (44) and the second hydraulic cover (43). The gas compressor (1) further includes: a rod (51) that penetrates the first hydraulic cover (42) and that couples the gas piston (33) and the hydraulic piston (44) to each other; and a position detector (8A) that is mounted to the second hydraulic cover (43) and that detects a position of the hydraulic piston (44).