A marine diesel engine piston seal ring fracture detection system

Abstract

The utility model discloses a kind of marine diesel engine piston sealing steel ring fracture detection systems, it is related to marine diesel engine fault detection technical field, comprising: detection component and receiving component.Detection component is embedded and installed in sealing steel ring inside, for detecting whether sealing steel ring breaks, receiving component is fixed on diesel engine cylinder sleeve outer wall, and receiving component is used to receive the signal change of detection component.The utility model, using magnetic piece and magnetic sensor combination design, directly reflect sealing steel ring fracture state using magnetic field mutation, while integrated RFID label realizes double verification, reduces the false alarm rate of single sensor by RFID label signal change auxiliary judgment.

Description

Technical Field

[0001] This utility model relates to the field of marine diesel engine fault detection technology, and in particular to a marine diesel engine piston seal ring fracture detection system. Background Technology

[0002] Marine diesel engines are the core power equipment of ships, and the sealing performance between the piston and cylinder liner directly affects the overall operating efficiency and safety of the engine. As a critical sealing component, the piston sealing ring is prone to fracture and failure due to long-term operation in harsh environments with high temperature, high pressure, and strong vibration.

[0003] In the existing technology, since the sealing steel ring is installed inside the piston, it is impossible to use wired transmission to monitor its condition, making it difficult to detect fracture faults in a timely manner. Therefore, there is an urgent need for a device that can monitor the fracture state of the sealing steel ring in a non-contact manner to solve the technical defects in the existing technology. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a fracture detection system for marine diesel engine piston seal rings.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A fracture detection system for piston seal rings of marine diesel engines includes:

[0007] A detection component, embedded inside the sealing ring, is used to detect whether the sealing ring has broken. The detection component includes:

[0008] Magnetic components and RFID tags, with the magnetic components and RFID tags fixedly connected;

[0009] A receiving component, fixed to the outer wall of the diesel engine cylinder liner, is used to receive signal changes from the detection component. The receiving component includes:

[0010] A magnetic sensor and an RFID reader are used, where the magnetic component and the magnetic sensor interact with each other through magnetic field coupling, and the magnetic sensor is used to detect changes in the magnetic field.

[0011] RFID tags and RFID readers achieve wireless communication connection via radio frequency signals;

[0012] The controller is installed outside the diesel engine, and the magnetic sensor and RFID reader are electrically connected to the controller.

[0013] The above technical solution further includes: the magnetic component adopts a samarium cobalt magnet, the magnetic component adopts a segmented design, and multiple groups are evenly arranged along the circumference of the sealing steel ring, with the polarity of each group of magnets alternating.

[0014] Furthermore, the magnetic sensor is a Hall element used to detect changes in magnetic field strength and direction.

[0015] Furthermore, it also includes an alarm component, which is installed outside the diesel engine. The alarm component includes an audible and visual alarm, which is electrically connected to the controller and is used to issue an audible and visual alarm after the receiving component detects a signal change.

[0016] Furthermore, the receiving component is mounted via a fixed bracket, and a vibration damping pad is provided between the fixed bracket and the diesel engine cylinder liner.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. In this utility model, a combination design of magnetic components and magnetic sensors is adopted to directly reflect the fracture state of the sealing steel ring by utilizing the sudden change in magnetic field.

[0019] 2. In this utility model, the integrated RFID tag achieves dual verification. The RFID tag signal changes assist in the judgment, reducing the false alarm rate of a single sensor. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the sealing steel ring.

[0021] Figure 2 This is a schematic diagram showing the connection relationship of the components of this utility model.

[0022] In the picture:

[0023] 100. Sealing steel ring;

[0024] 10. Magnetic components; 11. Magnetic sensors; 20. RFID tags; 21. RFID readers; 30. Controllers; 40. Audible and visual alarms. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1

[0027] See attached document Figure 1-2 A marine diesel engine piston seal ring fracture detection system includes a detection component and a receiving component. The detection component is embedded inside the seal ring 100 and is used to detect whether the seal ring 100 has fractured. The receiving component is fixed to the outer wall of the diesel engine cylinder liner and is used to receive signal changes from the detection component.

[0028] In one embodiment of this utility model, the detection component includes: a magnetic component 10 and an RFID tag 20, wherein the magnetic component 10 and the RFID tag 20 are fixedly connected; wherein, the magnetic component 10 adopts a samarium cobalt magnet (model SmCo28), and the magnetic component 10 and the RFID tag 20 adopt a segmented design, with multiple sets evenly arranged along the circumference of the sealing steel ring 100, and the polarity of each set of magnets is arranged alternately (N pole and S pole are distributed alternately); the RFID tag 20 adopts an ultra-high frequency passive tag, which is fixed between the magnetic sensors 11 by high temperature resistant epoxy resin, and is encapsulated in a ceramic sealed shell, the surface of the shell being flush with the inner wall of the steel ring.

[0029] It should be noted that: When the segmented magnets are installed independently and are not broken, each segment of magnet maintains a fixed distance (e.g., 45° interval between each segment) along the circumference of the sealing steel ring 100. The magnetic fields (alternating polarities) of adjacent magnets form a stable "circumferential superposition field". If the break occurs between two magnetic components 10, the break of the sealing steel ring 100 will cause the magnetic components 10 on both sides to separate or misalign along the break of the sealing steel ring 100 (e.g., radial offset, circumferential gap opening). This will cause the distance between the two adjacent magnets to suddenly increase (from the designed fixed interval to a disordered gap). The magnetic field superposition effect is broken, the local magnetic field strength will drop sharply due to the increased distance, and the alternation pattern of magnetic field direction (NSNS) will be disrupted, forming a "magnetic field disorder area" that can be identified by the Hall sensor.

[0030] Corresponding to the magnetic component 10, the RFID tag 20 also adopts a segmented layout (one RFID tag 20 is placed next to each segment of the magnetic component 10). When the break occurs between two segments of the RFID tag 20, the RFID tags 20 on both sides of the break will deviate from their original positions as they separate from the sealing steel ring 100. The relative distance and angle between them and the RFID reader 21 on the outer wall of the cylinder liner will change drastically, causing the signal attenuation of the RFID tag 20 to exceed the normal range, or even result in loss. This signal anomaly and magnetic field change form a "double verification," so even if the magnetic component 10 is not broken, the breakage phenomenon can be determined by the abnormal signal of the RFID tag 20.

[0031] The receiving components include: a magnetic sensor 11 and an RFID reader 21. The magnetic component 10 and the magnetic sensor 11 achieve signal interaction through magnetic field coupling. The magnetic sensor 11 is used to detect changes in the magnetic field. The RFID tag 20 and the RFID reader 21 achieve wireless communication connection through radio frequency signals. Among them, the magnetic sensor 11 is a Hall element, using an A1324 Hall effect sensor, used to detect changes in magnetic field strength and direction. The RFID reader 21 uses an ultra-high frequency read / write module and is equipped with a miniature ceramic antenna.

[0032] The controller 30 is installed outside the diesel engine. The magnetic sensor 11 and the RFID reader 21 are electrically connected to the controller 30. The controller 30 is an STM32F103 with a built-in magnetic field feature analysis algorithm, which can identify the difference in magnetic field between normal vibration and fracture impact.

[0033] In one embodiment of this utility model, an alarm component is further included. The alarm component is installed outside the diesel engine and includes an audible and visual alarm 40, which is electrically connected to the controller 30. The alarm 40 is used to issue an audible and visual alarm after the receiving component detects a signal change. The controller presets a magnetic field strength threshold range; when the detected magnetic field change exceeds the threshold range, the audible and visual alarm 40 is triggered.

[0034] In one embodiment of this utility model, the receiving component is mounted by a stainless steel fixing bracket, and a vibration damping pad is provided between the fixing bracket and the diesel engine cylinder liner; wherein, the radial distance between the receiving component and the detection component should be maintained at 5-8mm.

[0035] In one embodiment of this utility model,

[0036] It should be noted that when selecting materials, all electronic components must meet industrial-grade temperature standards (-40℃ to +125℃), and the receiving components must have an IP6K9K protection rating, which can withstand high-pressure washing and oil mist corrosion.

[0037] In this embodiment, the working principle of the device is as follows: when the sealing steel ring 100 is working normally, the magnetic component 10 forms a stable ring magnetic field, the magnetic field strength and direction detected by the magnetic sensor 11 remain constant, and the RFID reader 21 and the RFID tag 20 maintain stable communication.

[0038] When the sealing steel ring 100 breaks, the magnetic component 10 is displaced or separated along with the fragments of the sealing steel ring 100, causing a sudden change in the local magnetic field strength and disorder in the magnetic field direction; at the same time, the RFID tag 20 causes the communication signal strength to attenuate or the frequency to shift due to the change in position. The controller 30 analyzes the data of the magnetic sensor 11 and the RFID reader 21, and when abnormal data occurs, it drives the audible and visual alarm 40 to issue an alarm signal.

[0039] Additional explanation: When the sealing steel ring 100 breaks, a set of magnetic components 10 is displaced along with the steel ring fragments, causing the magnetic field strength detected by the magnetic sensor 11 to decrease from the reference value. At the same time, the tag signal strength received by the RFID reader 21 is attenuated. After the controller 30 detects the above characteristics in multiple consecutive sampling cycles, it will drive the audible and visual alarm 40 to issue an audible and visual alarm and upload the fault information to the engine monitoring system through the ship's CAN bus.

[0040] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A marine diesel engine piston seal ring break detection system, characterized by, include: A detection component, embedded inside the sealing steel ring (100), is used to detect whether the sealing steel ring (100) has broken. The detection component includes: A magnetic component (10) and an RFID tag (20) are fixedly connected; A receiving component, fixed to the outer wall of the diesel engine cylinder liner, is used to receive signal changes from the detection component. The receiving component includes: The magnetic sensor (11) and RFID reader (21) are connected by magnetic component (10) and magnetic sensor (11) through magnetic field coupling to achieve signal interaction. The magnetic sensor (11) is used to detect changes in magnetic field. The RFID tag (20) and the RFID reader (21) are wirelessly connected via radio frequency signals; The controller (30) is installed outside the diesel engine, and the magnetic sensor (11) and the RFID reader (21) are electrically connected to the controller (30).

2. The marine diesel engine piston seal ring fracture detection system according to claim 1, characterized in that, The magnetic component (10) uses samarium cobalt magnets. The magnetic component (10) adopts a segmented design, with multiple groups evenly arranged along the circumference of the sealing steel ring (100), and the polarity of each group of magnets is arranged alternately.

3. The marine diesel engine piston seal ring fracture detection system according to claim 2, characterized in that, The magnetic sensor (11) is a Hall element used to detect changes in magnetic field strength and direction.

4. The marine diesel engine piston seal ring fracture detection system according to claim 3, characterized in that, It also includes an alarm component, which is installed outside the diesel engine. The alarm component includes an audible and visual alarm (40), which is electrically connected to the controller (30) and is used to issue an audible and visual alarm after the receiving component detects a signal change.

5. A system for detecting breakage of a sealing band of a marine diesel engine piston according to claim 4, characterized in that The receiving component is mounted via a fixed bracket, and a vibration damping pad is provided between the fixed bracket and the diesel engine cylinder liner.

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