Rotating Cylinder Diameter Measurement Device
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Solution Overview
Problem
Current methods for measuring cylinder diameters in engines require dismantling engine parts and are inadequate for detecting deviations in the cylindrical shape due to localized abrasive or corrosion damage, which can lead to incomplete evaluations of cylinder liner conditions.
Innovation Solution
A measuring device comprising a rotatable measuring holder and a measuring rack that can be inserted through a hole in the cylinder wall, allowing for radial measurements without dismantling engine parts, equipped with a probe, sensors, and a motor for accurate and flexible diameter assessment, including temperature and altitude compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual measurement methods with rulers and measuring rods are used, then basic diameter measurements can be obtained, but the evaluation of cylinder liner state is incomplete and cannot detect deviations from cylindrical shape
Solution Approach 1:
The measuring device segments the measurement process into multiple radial directions, taking measurements at several different radial positions around the cylinder circumference. This segmentation allows detection of ovality and non-circular deformations that single-direction measurements would miss, thereby improving measurement precision while preventing information loss about the cylinder's true geometric state.
Solution Approach 2:
The invention transitions from one-dimensional linear measurements to two-dimensional radial measurements by rotating the measuring holder around the cylinder axis. This dimensional change enables comprehensive mapping of the cylinder cross-section, detecting ovality, trumpet shape, and other deviations from perfect cylindrical form, thus resolving the contradiction between basic measurement capability and comprehensive state evaluation.
2Ease of operation
If the cylinder head is dismantled to perform measurements, then access to the cylinder interior is obtained, but engine operational time is lost and complexity increases
Solution Approach 1:
The invention extracts the measurement function from the traditional dismantling process by introducing a portable measuring device that can access the cylinder through existing openings. The measuring holder and rack system is inserted through the cylinder head opening without removing the head itself, separating the measurement operation from engine disassembly, thereby eliminating time loss while maintaining ease of operation.
Solution Approach 2:
The measuring device acts as an intermediary tool that bridges the gap between external measurement capabilities and internal cylinder conditions. By inserting the measuring rack and holder through the cylinder head opening rather than dismantling the head, the device mediates access to the measurement zone without requiring engine disassembly, thus preventing time loss while preserving operational ease.
3Quantity of substance
If multiple manual measurements are taken vertically in fore-and-aft and thwart ships directions, then some diameter data is collected, but the work is extensive and productivity is low
Solution Approach 1:
The measuring holder rotates continuously around the cylinder axis, taking measurements at multiple radial positions without interruption. This continuous rotational measurement replaces discrete manual measurements, maintaining constant data collection across all radial directions and significantly improving productivity while collecting comprehensive cylinder geometry data.
Solution Approach 2:
The measuring device employs periodic rotation of the holder at predetermined angular intervals, systematically collecting diameter measurements at multiple radial positions around the cylinder. This periodic measurement approach efficiently gathers comprehensive geometric data including ovality detection, replacing extensive manual measurements with automated periodic sampling, thus increasing productivity while maintaining data quantity.
Data Source
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AI summary
A measuring device (1) for measuring a diameter of a cylinder (17) in an engine. The measuring device (1) is characterised in that the measuring device (1) comprises a measuring rack (2), further comprising at least two rack supports (5, 6, 7), whereineach rack support (5, 6, 7) has an inner end, said inner ends being connected to each other, a rotatable measuring holder (3) adapted to rotate in a plane which is perpendicular to central axis of the cylinder, further comprising at least one measuring unit (9), wherein said measuring unit (9) is adapted to provide a measurement in said plane and substantially radially with regard to the cylinder (17), a rotation motor (4), wherein said measuring rack (2) and said rotatable measuring holder (3) are attached to each other, and said rotatable measuring holder (3) is rotatable relative to said measuring rack (2) by said rotation motor (4). A method for measuring a diameter of a cylinder (17) in an engine is also presented.