Sensor Assembly for Fluid Rotation Machine Shaft Detection
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Solution Overview
Problem
Existing rotary fluid machines face challenges in accurately detecting shaft rotation due to complex sensor installation requirements and potential interference from hydraulic fluid, leading to increased operational complexity and susceptibility to errors.
Innovation Solution
A sensor arrangement is designed with a receiving area sealed within the machine's housing, allowing hydraulic fluid to lubricate contact surfaces and reducing torque requirements, while the sensor housing is securely fastened to the front cover without needing an opening for moving elements, enabling precise rotation detection with minimal torsion and easy maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the sensor is positioned to be less obtrusive, then the sensor arrangement is improved, but the sensor cannot directly detect the shaft's rotation and requires multiple contact points with play
Solution Approach 1:
The sensor is nested within the receiving area that is sealed within the housing, allowing the sensor to be positioned optimally for detection while being protected from hydraulic fluid interference. The sensor assembly is integrated into the housing structure rather than being externally mounted.
Solution Approach 2:
A non-magnetic, fluid-permeable membrane or window is introduced as an intermediary between the hydraulic fluid environment and the sensor. This allows hydraulic fluid to reach the sensor for lubrication while preventing fluid leakage and magnetic field interference with the sensor's detection function.
2Measurement precision
If the sensor assembly requires an opening for moving elements, then the sensor can detect rotation, but additional seals are needed which increase complexity and wear
Solution Approach 1:
The sensor assembly is nested within the sealed receiving area of the housing, eliminating the need for separate openings and seals. The sensor is positioned inside the housing where it can detect shaft rotation directly without requiring additional sealing components.
Solution Approach 2:
The receiving area is merged with the housing structure, combining the sensor mounting function with the housing's existing sealed cavity. This integration eliminates the need for separate sensor openings and associated seals, reducing complexity.
3Ease of operation
If the sensor is located outside the receiving area, then the receiver can be positioned outside the housing, but the sensor cannot directly detect rotation without additional transmission elements
Solution Approach 1:
The sensor is nested within the receiving area that is sealed within the housing, allowing the sensor to be positioned optimally for detection while being protected from hydraulic fluid interference. The sensor assembly is integrated into the housing structure rather than being externally mounted.
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 configuration enhances operational reliability, reduces wear, and simplifies sensor installation and maintenance by eliminating the need for additional seals and minimizing torsional stress, allowing for accurate and efficient detection of shaft rotation with low-friction interactions and adaptable sensor components.
Implementation Method 1
hydraulic fluid can penetrate the receiving area and simultaneously lubricate the contact surfaces between the sensor and the housing or other components
Implementation Method 2
A transmitter and receiver are provided, wherein the transmitter is arranged in the receiving area and the receiver is arranged outside the receiving area
Data Source
Figure 1~2
Figure 3a~3c
Figure 4a~4b
AI summary
Fluid rotary machine (1) comprising a housing (2), a shaft (3) extending from the housing (2), and a sensor arrangement (10) comprising a sensor (12) operatively connected to the shaft (3), and a receiver (15). The sensor arrangement (10) has a receiving area in which the sensor (12) is arranged, the receiving area being in fluid communication with the interior of the housing (2) and sealed to the outside, and the receiver (15) being arranged outside the housing (2) and the receiving area.