Cable lifter stress detection method
By simulating the actual meshing and loading process of the anchor chain and anchor chain wheel on a physical prototype, and using differentiated point placement and wireless signal transmission technology, the stress of the anchor chain wheel was accurately detected, solving the problem of insufficient simulation in traditional methods and improving the efficiency of structural optimization and equipment reliability.
Patent Information
- Application Number
- CN202610032005.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-12
- Publication Date
- 2026-03-06
AI Technical Summary
Traditional anchor chain wheel stress detection methods cannot accurately simulate the dynamic load conditions during ship navigation, and simulation software cannot accurately simulate the actual load conditions of the anchor chain wheel, resulting in low efficiency of structural optimization.
Using equipment such as anchor winch drive devices, strain gauges, and fixed pulleys, the actual meshing and loading process of the anchor chain and anchor chain wheel is simulated on a physical prototype. Strain gauges are arranged on the back of the main and secondary stress chain sockets using a differentiated placement method. Combined with wireless signal transmission and data processing, comprehensive and accurate stress detection is achieved.
It provides accurate dynamic measurement data, solving the problems of missed key areas and insufficient data representativeness in traditional sampling methods. It provides key data support for the optimization of anchor chain wheel structure and improves the reliability of ship anchoring equipment.
Smart Images
Figure CN121612445A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of anchor chain wheel testing technology, specifically to a method for testing anchor chain wheel stress. Background Technology
[0002] Anchor chain wheels are the core component of ship anchor winches, primarily used for raising and lowering anchor chains to achieve anchoring and positioning of the ship. Their structural strength and stress distribution directly affect the ship's navigational safety. With the rapid development of the shipping industry, ships are becoming larger and faster, leading to increasingly higher requirements for anchoring loads. Simultaneously, lightweight design has become an industry trend, and the traditional approach of directly using standard anchor chain wheels is no longer sufficient to meet the needs of modern ships.
[0003] Accurately obtaining the stress distribution under load is crucial in the design and optimization of anchor chain wheels. However, during the actual deployment and retrieval of the anchor chain, the contact posture between the anchor chain and the anchor chain wheel is easily affected by factors such as ship turbulence and the weight of the anchor chain, making it difficult to maintain a fixed position. This results in traditional simulation software being unable to accurately simulate the actual load conditions of the anchor chain wheel, leading to significant deviations between the simulation results and the actual stress distribution, which seriously affects the efficiency of anchor chain wheel structural optimization.
[0004] Existing anchor chain wheel stress testing methods are limited by their single loading method, which can only simulate static loads and cannot reproduce the dynamic load conditions during ship navigation. Summary of the Invention
[0005] The purpose of this invention is to provide a method for detecting the stress of an anchor chain wheel, so as to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, the present invention provides the following technical solution: a method for detecting stress in an anchor chain wheel, comprising the following steps: Step 1: Install the anchor chain wheel on the anchor winch drive equipment and tighten the anchor chain by using the anchor chain teeth on the anchor chain wheel; Step 2: Connect the anchor chain to the wire rope of the loading test bench using shackles; Step 3: Using a fixed pulley on the loading test bench, weights are hoisted with steel wire ropes to simulate the load state of the anchor chain wheel on the ship; Step 4: When the anchor chain wheel is in the braking state, apply strain gauges to the back areas of the main stress chain socket and the adjacent secondary stress chain socket of the anchor chain wheel. Five detection points are arranged on the back of the main stress chain socket and four detection points are arranged on the back of the secondary stress chain socket. Step 5: Connect the external wires of the strain gauge to the stress detection equipment, and use a magnet to attach the stress detection equipment to the anchor chain wheel; Step Six: Transmit the stress data signals collected by the stress detection equipment to the computer processing software via a wireless signal transmission device; Step 7: Use a computer to collect and post-process the received stress data to complete the stress detection of the anchor chain wheel.
[0007] Preferably, in step one, lubricating grease is applied to the contact surface between the anchor chain teeth and the anchor chain to reduce frictional loss between the anchor chain and the teeth and ensure accurate force transmission.
[0008] Preferably, in step three, the surface of the fixed pulley of the loading test platform is provided with anti-slip texture to prevent the wire rope from slipping during the hoisting of the weights.
[0009] Preferably, the weights in step three are detachable and modular, with each weight weighing 10kg. The load can be adjusted from 50kg to 500kg by increasing or decreasing the number of weights, thus adapting to the testing requirements of anchor chain wheels of different tonnages.
[0010] Preferably, in step four, the strain gauge is applied using a high-strength epoxy adhesive with a bonding strength ≥5MPa, ensuring that the strain gauge does not fall off during the vibration of the anchor chain wheel.
[0011] Preferably, the strain gauge detection range in step four is -2000με to 2000με, with a linear error ≤ ±0.5%, which meets the stress detection requirements of the anchor chain wheel under different stress states.
[0012] Preferably, in step five, the stress testing equipment has a built-in data cache module with a cache capacity of ≥16GB, which can temporarily store the test data when the wireless signal transmission device is interrupted, thus avoiding data loss.
[0013] Preferably, the stress detection equipment in step five is powered by a rechargeable lithium battery.
[0014] Preferably, in step six, the wireless signal transmission device is a router, used to wirelessly transmit data signals to the computer.
[0015] Preferably, in step four, five strain gauges are attached to the back of the main stress-bearing sprocket socket of the anchor sprocket. One strain gauge is located at the center of the back of the bottom of the main stress-bearing sprocket socket to capture the maximum stress value. Two strain gauges are located on the back of the tooth roots on both sides of the main stress-bearing sprocket socket to monitor the shear stress gradient. One strain gauge is located on the back of the transition fillet at the edge of the main stress-bearing sprocket socket to monitor the additional stress. Four strain gauges are attached to the secondary stress-bearing sprocket socket. Two strain gauges are located at the mating surface between the anchor sprocket hub and the sprocket body to verify the stress transmission efficiency from the sprocket socket to the hub. The other two strain gauges are located on the back of the tooth roots and bottom of the secondary stress-bearing sprocket socket to monitor the stress level between the secondary stress-bearing sprocket socket and the sprocket in a partially engaged or about-to-engage state.
[0016] Compared with the prior art, the beneficial effects of the present invention are: This invention directly recreates the actual meshing and loading process of the anchor chain and chain wheel on a physical prototype using anchor winch drive equipment, strain gauges, and fixed pulleys. This avoids stress distribution deviations caused by insufficient simulation of contact posture in simulation software, ensuring that stress detection results closely match actual working conditions. This provides accurate dynamic measurement data for anchor wheel structure optimization. The differentiated placement of five detection points on the back of the main stress-bearing chain socket and four detection points on the back of the secondary stress-bearing chain socket focuses on the core areas of stress concentration and covers the critical load transfer paths. This achieves comprehensive and accurate capture of the anchor wheel stress distribution, completely solving the shortcomings of traditional point placement methods that miss key areas and lack data representativeness. This provides crucial data support for anchor wheel structure optimization and improved reliability of ship anchoring equipment.
[0017] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description
[0018] Figure 1 This is a flowchart of a method for detecting stress in an anchor chain wheel according to the present invention; Figure 2 This is a schematic diagram of the stress plate arrangement in an anchor chain wheel stress detection method according to the present invention. Figure 3 This is a perspective view of the connection structure of the anchor winch drive equipment in the anchor chain wheel stress detection method of the present invention; Figure 4 This is a front view of the anchor winch drive equipment connection structure of the anchor chain wheel stress detection method of the present invention.
[0019] Attached diagram descriptions: 1. Anchor winch drive equipment; 2. Anchor sprocket; 3. Anchor chain wire rope; 4. Fixed pulley; 5. Weights. Detailed Implementation
[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.
[0021] Example 1: Please refer to Figures 1-4 This invention provides a technical solution: a method for detecting stress in an anchor chain wheel, comprising the following steps: Step 1: Install the anchor chain wheel 20 on the anchor winch drive device 10, and tighten the anchor chain through the anchor chain teeth on the anchor chain wheel 20; simulate the tension state of the anchor chain during actual anchoring; ensure that the tension of the anchor chain is accurately transmitted to the anchor chain wheel during the loading test, provide a real and stable load input basis for stress detection, and enable the test data to accurately reflect the actual stress characteristics of the anchor chain wheel; Step 2: Connect the anchor chain to the steel wire rope of the loading test bench using shackles; as a standardized rigid connector, the shackles ensure a reliable connection between the anchor chain and the steel wire rope of the loading test bench, guaranteeing a stable force transmission path, avoiding load loss due to deformation or slippage of the connecting parts, and allowing the weight of the weight to be linearly converted into the tension of the anchor chain. Step 3: Using the fixed pulley 40 on the loading test bench, the weight 50 is hoisted by steel wire rope to simulate the load state of the anchor chain wheel 20 on the ship; the fixed pulley changes the direction of the force, converting the weight of the weight into the tension of the anchor chain, simulating the tensile load borne by the anchor chain when the ship is anchored. Step 4: When the anchor chain wheel 20 is in the braking state, apply strain gauges to the back areas of the main stress-bearing chain socket and the adjacent secondary stress-bearing chain socket. Five detection points are arranged on the back of the main stress-bearing chain socket, and four detection points are arranged on the back of the secondary stress-bearing chain socket. When the anchor chain wheel is braking, it is in a static state, and the strain gauges can stably collect static stress. After loading weights, dynamic stress is collected. The five points of the main stress-bearing chain socket respectively target three core stress types: bottom compressive stress, tooth root shear stress, and edge additional stress. The four points of the secondary stress-bearing chain socket cover two supplementary scenarios: load transfer efficiency and partial meshing stress, so as to realize the full-dimensional layered monitoring of the stress on the anchor chain wheel. Step 5: Connect the external wires of the strain gauge to the stress detection equipment, and use a magnet to attach the stress detection equipment to the anchor chain wheel; the magnet uses electromagnetic attraction to achieve quick installation and non-destructive fixation of the stress detection equipment without the need for machining the anchor chain wheel; Step Six: Transmit the stress data signals collected by the stress detection equipment to the computer processing software via a wireless signal transmission device; the wireless signal transmission device uses the 5G / WiFi wireless protocol to convert the digital signals of the stress detection equipment into wireless signals and transmit them to the computer, thus eliminating the spatial limitations of cables on the movement of the anchor chain wheel and adapting to possible rotation or dynamic detection scenarios of the anchor chain wheel. Step 7: Use a computer to collect and post-process the received stress data to complete the anchor chain wheel stress detection. The computer processing software performs "analysis, filtering, visualization, and analysis" on the wirelessly transmitted digital signals, processing the entire process. Through algorithms, it extracts stress peak values, draws stress cloud maps, and calculates stress gradients, transforming the raw data into engineering knowledge that can be directly used for structural optimization.
[0022] In step one, grease is applied to the contact surface between the anchor chain teeth and the anchor chain to reduce frictional loss and ensure accurate force transmission. Applying grease to the contact surface utilizes its anti-friction properties to fill the microscopic gaps at the interface between the anchor chain and the teeth, reducing the coefficient of friction and allowing the anchor chain's tension to more closely approximate the ideal state of "rigid transmission," thus reducing force loss and distortion caused by friction.
[0023] In step three, the surface of the fixed pulley on the loading test bench is textured with anti-slip patterns to prevent the wire rope from slipping during the lifting of the weights. The anti-slip patterns on the fixed pulley surface increase the friction between the wire rope and the pulley groove, preventing slippage and ensuring that the weight of the weight is 100% converted into the tension of the anchor chain, achieving accurate load simulation. This not only achieves accurate static simulation of the anchor chain wheel's load state but also ensures load stability throughout the testing process through the anti-slip design, significantly improving the load input accuracy of stress testing and providing load-level assurance for the data's authenticity.
[0024] In step four, the strain gauges are attached using a high-strength epoxy adhesive with a bonding strength ≥5MPa, ensuring that the strain gauges do not detach during the vibration of the anchor chain wheel. The high-strength epoxy adhesive, through strong intermolecular forces, tightly bonds the strain gauges to the anchor chain wheel surface and the strain gauge substrate, resisting the shear forces during anchor chain wheel vibration and ensuring that the strain gauges do not detach and the signal does not drift.
[0025] In step four, the strain gauge's detection range is -2000με to 2000με, with a linear error ≤ ±0.5%, meeting the stress detection requirements of the anchor chain wheel under different stress states. The wide detection range of -2000με to 2000με covers the strain changes of the anchor chain wheel under light load, heavy load, and impact load conditions, while the ≤ ±0.5% linear error ensures high accuracy of the strain data. The wide-range, high-precision strain gauge meets the detection requirements of different stress states, ultimately making the stress detection data both comprehensive and reliable.
[0026] In step five, the stress testing equipment has a built-in data caching module with a cache capacity of ≥16GB. This module can temporarily store test data when the wireless signal transmission is interrupted, preventing data loss. The stress testing equipment in step five is powered by a rechargeable lithium battery. The data caching module temporarily stores test data when the wireless signal is interrupted and automatically resumes transmission when the signal is restored. The rechargeable lithium battery provides the equipment with a portable and long-lasting power supply, meeting the mobility requirements of on-site testing. The data caching function ensures the integrity of the test data, avoiding data loss due to environmental interference. Lithium battery power frees the equipment from cable constraints, allowing for flexible adaptation to complex testing environments such as shipyards.
[0027] In step six, the wireless signal transmission device is a router, used to wirelessly transmit data signals to the computer. Wireless transmission reduces electromagnetic interference paths and eliminates the restriction of cables on the movement of the anchor chain wheel, making it feasible for subsequent dynamic detection of stress changes, and enabling data transmission to be both stable and flexible.
[0028] Please refer to the following: Figure 2In step four, five strain gauges are attached to the back of the main stress-bearing sprocket socket of the anchor sprocket. One strain gauge is located at the center of the back of the bottom of the main stress-bearing sprocket socket to capture the maximum stress value. Two strain gauges are located on the back of the tooth roots on both sides of the main stress-bearing sprocket socket to monitor the shear stress gradient. One strain gauge is located on the back of the transition fillet at the edge of the main stress-bearing sprocket socket to monitor the additional stress. Four strain gauges are attached to the secondary stress-bearing sprocket socket. Two strain gauges are located at the mating surface between the anchor sprocket hub and the sprocket body to verify the stress transmission efficiency from the sprocket socket to the hub. The other two strain gauges are located on the back of the tooth roots and bottom of the secondary stress-bearing sprocket socket to monitor the stress level between the secondary stress-bearing sprocket socket and the sprocket in the partial or imminent meshing state.
[0029] The primary load-bearing chain pockets are those where the anchor chain wheel and anchor chain are fully engaged. There are typically one or two such pockets, which dynamically switch positions as the anchor chain wheel rotates. These are the core components bearing the anchor chain's tension, torque, and impact loads, exhibiting the highest and most drastic stress values. Secondary load-bearing chain pockets are adjacent pockets where the anchor chain wheel and anchor chain are partially engaged or about to engage. They bear approximately 30%-50% of the load of the primary load-bearing chain pockets and are used to monitor stress transmission patterns and changes in engagement phase.
[0030] Figure 2 The diagram illustrates the arrangement of strain gauges in the primary and secondary stress-bearing chain sockets. Rectangles numbered 1-5 represent strain gauges in the primary stress-bearing chain socket region, while rectangles numbered 6-9 represent the arrangement of secondary stress-bearing chain sockets. Strain gauge 1 is placed on the back of the rounded corner at the edge of a primary chain socket to capture stress concentration peaks when the chain socket engages with the anchor chain. Strain gauges 2 and 3 are symmetrically placed on the back of the tooth roots on both sides of the same primary chain socket to monitor the shear stress gradient when the chain socket is under load. Strain gauges 4 and 5 are placed on the back of the bottom of the primary chain socket and at the transition between adjacent chain sockets to capture the in-plane compressive stress caused by the radial pressure of the anchor chain, while also verifying the stress transfer efficiency to the surrounding structure. Strain gauges 6 and 7 are placed on the tooth roots and back of the bottom of the secondary stress-bearing chain sockets, monitoring the stress level load under partial engagement conditions, which is approximately 30%-50% of that of the primary chain socket, providing a load gradient comparison with the data from strain gauges numbered 1-5. Numbered 8 and 9 are placed in the transition area between the hub and the sprocket body to verify the efficiency of stress transfer from the chain socket to the hub and avoid stress abrupt changes caused by structural stiffness mismatch.
[0031] This invention directly recreates the actual meshing and loading process of the anchor chain and chain wheel on a physical prototype using anchor winch drive equipment, strain gauges, and fixed pulleys. This avoids stress distribution deviations caused by insufficient simulation of contact posture in simulation software, ensuring that stress detection results closely match actual working conditions. This provides accurate dynamic measurement data for anchor wheel structure optimization. The differentiated placement of five detection points on the back of the main stress-bearing chain socket and four detection points on the back of the secondary stress-bearing chain socket focuses on the core areas of stress concentration and covers the critical load transfer paths. This achieves comprehensive and accurate capture of the anchor wheel stress distribution, completely solving the shortcomings of traditional point placement methods that miss key areas and lack data representativeness. This provides crucial data support for anchor wheel structure optimization and improved reliability of ship anchoring equipment.
[0032] Example 2: Please refer to Figures 1-4 This invention provides a technical solution: a method for detecting stress in an anchor chain wheel, comprising the following steps: Step 1: Install the anchor chain wheel 20 on the anchor winch drive device 10, and tighten the anchor chain through the anchor chain teeth on the anchor chain wheel 20; simulate the tension state of the anchor chain during actual anchoring; ensure that the tension of the anchor chain is accurately transmitted to the anchor chain wheel during the loading test, provide a real and stable load input basis for stress detection, and enable the test data to accurately reflect the actual stress characteristics of the anchor chain wheel; Step 2: Connect the anchor chain to the steel wire rope of the loading test bench using shackles; as a standardized rigid connector, the shackles ensure a reliable connection between the anchor chain and the steel wire rope of the loading test bench, guaranteeing a stable force transmission path, avoiding load loss due to deformation or slippage of the connecting parts, and allowing the weight of the weight to be linearly converted into the tension of the anchor chain. Step 3: Using the fixed pulley 40 on the loading test bench, the weight 50 is hoisted by steel wire rope to simulate the load state of the anchor chain wheel 20 on the ship; the fixed pulley changes the direction of the force, converting the weight of the weight into the tension of the anchor chain, simulating the tensile load borne by the anchor chain when the ship is anchored. Step 4: When the anchor chain wheel 20 is in the braking state, apply strain gauges to the back areas of the main stress-bearing chain socket and the adjacent secondary stress-bearing chain socket. Five detection points are arranged on the back of the main stress-bearing chain socket, and four detection points are arranged on the back of the secondary stress-bearing chain socket. When the anchor chain wheel is braking, it is in a static state, and the strain gauges can stably collect static stress. After loading weights, dynamic stress is collected. The five points of the main stress-bearing chain socket respectively target three core stress types: bottom compressive stress, tooth root shear stress, and edge additional stress. The four points of the secondary stress-bearing chain socket cover two supplementary scenarios: load transfer efficiency and partial meshing stress, so as to realize the full-dimensional layered monitoring of the stress on the anchor chain wheel. Step 5: Connect the external wires of the strain gauge to the stress detection equipment, and use a magnet to attach the stress detection equipment to the anchor chain wheel; the magnet uses electromagnetic attraction to achieve quick installation and non-destructive fixation of the stress detection equipment without the need for machining the anchor chain wheel; Step Six: Transmit the stress data signals collected by the stress detection equipment to the computer processing software via a wireless signal transmission device; the wireless signal transmission device uses the 5G / WiFi wireless protocol to convert the digital signals of the stress detection equipment into wireless signals and transmit them to the computer, thus eliminating the spatial limitations of cables on the movement of the anchor chain wheel and adapting to possible rotation or dynamic detection scenarios of the anchor chain wheel. Step 7: Use a computer to collect and post-process the received stress data to complete the anchor chain wheel stress detection. The computer processing software performs "analysis, filtering, visualization, and analysis" on the wirelessly transmitted digital signals, processing the entire process. Through algorithms, it extracts stress peak values, draws stress cloud maps, and calculates stress gradients, transforming the raw data into engineering knowledge that can be directly used for structural optimization.
[0033] In step one, grease is applied to the contact surface between the anchor chain teeth and the anchor chain to reduce frictional loss and ensure accurate force transmission. Applying grease to the contact surface utilizes its anti-friction properties to fill the microscopic gaps at the interface between the anchor chain and the teeth, reducing the coefficient of friction and allowing the anchor chain's tension to more closely approximate the ideal state of "rigid transmission," thus reducing force loss and distortion caused by friction.
[0034] In step three, the surface of the fixed pulley on the loading test bench is textured with anti-slip patterns to prevent the wire rope from slipping during the lifting of the weights. The anti-slip patterns on the fixed pulley surface increase the friction between the wire rope and the pulley groove, preventing slippage and ensuring that the weight of the weight is 100% converted into the tension of the anchor chain, achieving accurate load simulation. This not only achieves accurate static simulation of the anchor chain wheel's load state but also ensures load stability throughout the testing process through the anti-slip design, significantly improving the load input accuracy of stress testing and providing load-level assurance for the data's authenticity.
[0035] In step four, the strain gauges are attached using a high-strength epoxy adhesive with a bonding strength ≥5MPa, ensuring that the strain gauges do not detach during the vibration of the anchor chain wheel. The high-strength epoxy adhesive, through strong intermolecular forces, tightly bonds the strain gauges to the anchor chain wheel surface and the strain gauge substrate, resisting the shear forces during anchor chain wheel vibration and ensuring that the strain gauges do not detach and the signal does not drift.
[0036] In step four, the strain gauge's detection range is -2000με to 2000με, with a linear error ≤ ±0.5%, meeting the stress detection requirements of the anchor chain wheel under different stress states. The wide detection range of -2000με to 2000με covers the strain changes of the anchor chain wheel under light load, heavy load, and impact load conditions, while the ≤ ±0.5% linear error ensures high accuracy of the strain data. The wide-range, high-precision strain gauge meets the detection requirements of different stress states, ultimately making the stress detection data both comprehensive and reliable.
[0037] In step five, the stress testing equipment has a built-in data caching module with a cache capacity of ≥16GB. This module can temporarily store test data when the wireless signal transmission is interrupted, preventing data loss. The stress testing equipment in step five is powered by a rechargeable lithium battery. The data caching module temporarily stores test data when the wireless signal is interrupted and automatically resumes transmission when the signal is restored. The rechargeable lithium battery provides the equipment with a portable and long-lasting power supply, meeting the mobility requirements of on-site testing. The data caching function ensures the integrity of the test data, avoiding data loss due to environmental interference. Lithium battery power frees the equipment from cable constraints, allowing for flexible adaptation to complex testing environments such as shipyards.
[0038] In step six, the wireless signal transmission device is a router, used to wirelessly transmit data signals to the computer. Wireless transmission reduces electromagnetic interference paths and eliminates the restriction of cables on the movement of the anchor chain wheel, making it feasible for subsequent dynamic detection of stress changes, and enabling data transmission to be both stable and flexible.
[0039] Please refer to the following: Figure 2 In step four, five strain gauges are attached to the back of the main stress-bearing sprocket socket of the anchor sprocket. One strain gauge is located at the center of the back of the bottom of the main stress-bearing sprocket socket to capture the maximum stress value. Two strain gauges are located on the back of the tooth roots on both sides of the main stress-bearing sprocket socket to monitor the shear stress gradient. One strain gauge is located on the back of the transition fillet at the edge of the main stress-bearing sprocket socket to monitor the additional stress. Four strain gauges are attached to the secondary stress-bearing sprocket socket. Two strain gauges are located at the mating surface between the anchor sprocket hub and the sprocket body to verify the stress transmission efficiency from the sprocket socket to the hub. The other two strain gauges are located on the back of the tooth roots and bottom of the secondary stress-bearing sprocket socket to monitor the stress level between the secondary stress-bearing sprocket socket and the sprocket in the partial or imminent meshing state.
[0040] In this embodiment, everything else is the same as in Embodiment 1. The difference is that the weights in step three are detachable and modular, with each weight weighing 10kg. By increasing or decreasing the number of weights, the load can be adjusted within the range of 50kg-500kg, adapting to the testing needs of anchor chain wheels of different tonnages. The detachable modular weights allow for continuous or graded load adjustment within the 50kg-500kg range by adding or removing individual 10kg weights. One set of modular weights can meet the full range of testing requirements for anchor chain wheels from small to large vessels. The load on a ship at anchor is not a fixed value but dynamically changes with sea conditions and ship tonnage; for example, the anchor chain tension may fluctuate within ±20% of the design load. Fine-tuning the modular weights can simulate a load gradient closer to reality, such as gradually increasing from 100kg to 300kg, allowing the stress testing data to fully reflect the stress response of the anchor chain wheel during load changes, providing a more accurate basis for structural optimization.
[0041] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
Claims
1. A method of detecting a stress of a chain wheel, characterized by: The method comprises the following steps: Step one: install the anchor chain wheel on the anchor drive device, and tighten the anchor chain through the anchor chain block on the anchor chain wheel; Step two: connect the anchor chain with the steel wire rope of the loading test bench through the shackle; Step three: use the steel wire rope to hoist the weight through the fixed pulley of the loading test bench to simulate the loading state of the anchor chain wheel on the ship; Step four: when the anchor chain wheel is in the braking state, attach the strain gauges to the back surface of the main stress chain socket and the adjacent secondary stress chain socket of the anchor chain wheel, wherein five detection points are arranged on the back surface of the main stress chain socket, and four detection points are arranged on the back surface of the secondary stress chain socket; Step five: connect the external wires of the strain gauges to the stress detection equipment, and use the magnet to adsorb and fix the stress detection equipment on the anchor chain wheel; Step six: use the wireless signal transmission device to transmit the stress data signal collected by the stress detection equipment to the computer processing software; Step seven: use the computer to collect and process the received stress data to complete the stress detection of the anchor chain wheel.
2. A method of stress detection for a chain wheel according to claim 1, characterized in that: In step one, lubricating grease is applied to the contact surface between the anchor chain block and the anchor chain to reduce the friction loss between them and ensure the accuracy of force transmission.
3. A method of stress detection for a chain wheel as claimed in claim 1, characterized in that: In step three, the surface of the fixed pulley of the loading test bench is provided with anti-skid lines to prevent the steel wire rope from slipping during the hoisting of the weight.
4. A method of stress detection for a chain wheel as claimed in claim 1, characterized in that: In step three, the weight is a detachable combined structure, and the weight of each weight is 10 kg. The number of weights can be increased or decreased to adjust the load in the range of 50 kg-500 kg to meet the detection needs of anchor chain wheels of different tonnages.
5. A method of stress detection for a chain wheel as claimed in claim 1, characterized in that: In step four, the strain gauges are attached with high-strength epoxy adhesive, and the bonding strength of the adhesive is ≥5 MPa to ensure that the strain gauges do not fall off during the vibration of the anchor chain wheel.
6. A method of stress detection for a chain wheel as claimed in claim 1, characterized in that: In step four, the detection range of the strain gauges is -2000 με to 2000 με, and the linear error is ≤±0.5%, which meets the stress detection needs of the anchor chain wheel under different stress states.
7. A method of stress detection for a chain wheel as claimed in claim 1, characterized in that: In step five, the stress detection equipment is provided with a built-in data cache module with a cache capacity of ≥16 GB, which can temporarily store detection data when the signal of the wireless signal transmission device is interrupted to avoid data loss.
8. A method of stress detection for a chain wheel as claimed in claim 1, characterized in that: In step five, the power supply of the stress detection equipment is a rechargeable lithium battery.
9. A method of stress detection for a chain wheel as claimed in claim 1, characterized in that: In step six, the wireless signal transmission device is a router used for wireless transmission of data signals to the computer.
10. A method of stress detection for a chain wheel as claimed in claim 1, characterized in that: In step four, five strain gauges are attached to the back surface of the main stress chain socket of the anchor chain wheel, one of which is located at the center of the back surface of the bottom of the main stress chain socket for capturing the maximum stress value, two of which are located at the back surface of the tooth root on both sides of the main stress chain socket for monitoring the shear stress gradient, and one of which is located at the back surface of the transition fillet at the edge of the main stress chain socket for monitoring the additional stress. Four strain gauges are attached to the secondary stress chain socket, two of which are located at the joint surface between the hub and the chain wheel body of the anchor chain wheel for verifying the transmission efficiency of stress from the chain socket to the hub, and the other two are located at the tooth root and the bottom back surface of the secondary stress chain socket for monitoring the stress level of the secondary stress chain socket and the chain wheel in the partially engaged or about to engage state.