Health monitoring device for pod propulsor bearing

Abstract

The utility model relates to a pod propulsor bearing health monitoring device, which comprises a complete machine test bed, a driving system, a rolling bearing, a vibration sensor, an accelerometer acquisition card, a data terminal memory card, a PC (Personal Computer) end computer and a power adapter, the driving system drives the whole machine test bench and the rolling bearing to work, the plurality of vibration sensors are arranged on a bearing seat of the rolling bearing, and the vibration sensors are connected with the PC end computer through the accelerometer acquisition card and the data terminal memory card. The pod propulsor bearing health monitoring device can effectively solve the service state monitoring problem of the rolling bearing of the existing pod propulsor, can improve the reliability and the operation efficiency of the pod propulsor, optimizes the maintenance strategy, reduces the maintenance cost and the like, and promotes the intelligent development of the pod propulsor.

Description

Technical Field

[0001] The utility model relates to a pod propeller bearing of a ship power system, in particular to a pod propeller bearing health monitoring device. Background Art

[0002] Pod thrusters are a new type of specialized propulsion system, representing a high-tech advancement in the field of marine electric propulsion. The propulsion system utilizes a pod-like structure, breaking through the conventional "diesel engine with an open drive shaft system" propulsion system design and revolutionizing electric propulsion. The use of pod-type electric propulsion reduces water pollution caused by fuel emissions. Pod thrusters combine a propulsion motor and propeller within a davit housing. This assembly (propulsion motor, davit housing, propeller) is "suspended" from the stern of the ship using a rotating base. The hull only needs to provide the power required by the propulsion motor. The pod thruster's 360-degree rotation can change the ship's direction of travel.

[0003] As one of the key rotating components of the propulsion motor, the rolling bearing of the pod thruster is exposed to high temperatures around the motor and the presence of iron filings in the lubricating medium. The working environment of the rolling bearing is harsh and complex, making it prone to various failures, which can lead to abnormalities in the propulsion motor and even major safety accidents, resulting in serious casualties and economic losses. To prevent damage to the rolling bearing, both domestic and foreign methods currently use methods such as installing vibration sensors, temperature sensors, and liquid level sensors on the rolling bearings to conduct empirical evaluations of the data collected by the sensors. This empirical evaluation method generally has the following problems:

[0004] 1. The amount of data collected by sensors during podded propulsion operation is large, requiring a large storage space. Furthermore, the collected sensor signals cannot be well evaluated.

[0005] 2. Pod thruster rolling bearings operate under complex operating conditions, generating large amounts of data and complex relationships between them. Traditional data processing methods often struggle to effectively extract useful information, leading to inaccurate monitoring results.

[0006] 3. Traditional podded thruster bearing monitoring systems often fail to provide real-time monitoring and early warning. By the time a bearing fails, significant losses or impacts have already occurred. Summary of the Invention

[0007] The purpose of this utility model is to propose a pod thruster bearing health monitoring device, which overcomes the shortcomings of the existing pod thruster rolling bearing monitoring, can accurately judge the health status and service life of the rolling bearing, promote the development of the intelligent operation and maintenance system, and avoid a large amount of resource waste caused by regular maintenance.

[0008] To achieve the above-mentioned purpose, the technical solution of the utility model is: a pod thruster bearing health monitoring device, including a whole machine test bench, a drive system, a rolling bearing, a vibration sensor, an accelerometer acquisition card, a data terminal storage card, a PC computer, and a power adapter. The drive system drives the whole machine test bench and the rolling bearing to work. Multiple vibration sensors are arranged on the bearing seat of the rolling bearing, and the vibration sensors are connected to the PC computer through the accelerometer acquisition card and the data terminal storage card.

[0009] Furthermore, when the drive system is given different operating speeds, the whole machine test bench will have different operating conditions, and the rolling bearings will work together with the whole machine test bench.

[0010] Furthermore, when the entire test bench is operating, the vibration sensor obtains the operating signal of the rolling bearing and performs signal perception and transmission; the accelerometer acquisition card, the data terminal storage card and the PC computer are connected through a power adapter; the accelerometer acquisition card synchronously collects data as the rolling bearing operates; and the data terminal storage card stores data.

[0011] Furthermore, when the drive system drives the whole machine test bench, the data terminal storage card is used to compress and store the original vibration signal data from the accelerometer acquisition card through the PC computer, and to restore the compressed data from the data terminal storage card. The PC computer is used to analyze and process the restored original vibration signal to determine the health index data of the rolling bearing to be monitored; and based on the health index data, perform fault diagnosis on the rolling bearing to be monitored to obtain the fault diagnosis result of the rolling bearing to be monitored.

[0012] The beneficial effects of the present invention are mainly reflected in:

[0013] 1. Improve the reliability and operating efficiency of rolling bearings in podded propulsion systems. Rolling bearings are key components of podded propulsion systems, and their service condition directly affects their operation. Health monitoring can promptly detect potential bearing failures, ensuring the continued stable operation of podded propulsion systems.

[0014] 2. Optimize the maintenance strategy for podded thruster rolling bearings. Based on the results of bearing health monitoring, shipyards can develop a reasonable maintenance plan. This approach can avoid over- and under-maintenance and ensure the effectiveness and cost-effectiveness of maintenance work.

[0015] 3. Reduce maintenance costs. Traditional bearing maintenance often relies on empirical judgment and periodic replacement, which is not only inefficient but also costly. Bearing health monitoring enables real-time monitoring and analysis of bearing status, enabling timely detection of potential faults and the implementation of appropriate measures. This not only reduces downtime and repair costs caused by faults, but also extends bearing service life, reducing overall maintenance costs.

[0016] 4. Provide data support. The large amount of data collected during bearing health monitoring can provide strong support for the operation and maintenance of mechanical equipment. This data can be used to analyze the operating patterns, failure modes, and maintenance effects of the rolling bearings of podded thrusters, providing a scientific basis for subsequent equipment management and maintenance.

[0017] The utility model is a pod propeller bearing health monitoring device, which can effectively solve the existing pod propeller rolling bearing service status monitoring problems, improve the reliability and operating efficiency of the pod propeller, optimize maintenance strategies and reduce maintenance costs, etc., and promote the intelligent development of the pod propeller. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the pod thruster bearing health monitoring device;

[0019] Figure 2 This is a schematic diagram of the installation of the vibration sensor of the rolling bearing assembly

[0020] Figure 3 This is a schematic diagram of the whole machine test bench. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] like Figures 1 to 3 As shown, a pod thruster bearing health monitoring device proposed in an embodiment of the utility model includes a whole machine test bench 1, a drive system 2, a rolling bearing 3, a vibration sensor 4, an accelerometer acquisition card 5, a data terminal storage card 6, a PC computer 7, and a power adapter 8.

[0023] The drive system 2 drives the connection between the whole machine test bench 1 and the rolling bearing 3. The drive system 2 drives the whole machine test bench 1 to work. When the drive system 2 is given different operating speeds, the whole machine test bench 1 has different operating conditions, and the rolling bearing 3 works together with the whole machine test bench 1.

[0024] Rolling bearing 3 is mounted in bearing housing 3-1 and includes an inner ring 3-3, an outer ring 3-2, and rolling elements 3-3. Multiple vibration sensors 4 are installed on the bearing housing. These sensors are connected to a PC 7 via an accelerometer acquisition card 5 and a data terminal memory card 6.

[0025] When the complete machine test bench 1 is operating, the vibration sensor 4 acquires the operating signal of the rolling bearing 3, sensing and transmitting the signal. The accelerometer acquisition card 5, the data terminal memory card 6, and the PC computer 7 are connected via a power adapter 8. The accelerometer acquisition card 5 synchronously acquires data as the rolling bearing 3 rotates, and the data terminal memory card 6 stores the data. When the drive system 2 drives the complete machine test bench 1, the data terminal memory card 6 compresses and stores the data from the accelerometer acquisition card 5 through the PC computer 7, and then restores the compressed data from the data terminal memory card 6.

[0026] The podded thruster bearing health monitoring device provided by this utility model obtains the original vibration signal of the rolling bearing to be monitored; compresses the original signal and stores it in a local storage card; then restores the compressed data and, based on the original vibration signal, analyzes and processes it via a PC (computer 7) to determine health indicator data for the rolling bearing to be monitored; and, based on the health indicator data, performs fault diagnosis on the rolling bearing to be monitored, obtaining a fault diagnosis result. This device can accurately determine the health status and service life of the rolling bearing, promote the development of intelligent operation and maintenance systems, and avoid the significant waste of resources caused by periodic maintenance.

Claims

1. A pod thruster bearing health monitoring device, characterized by: It includes a whole machine test bench, a drive system, a rolling bearing, a vibration sensor, an accelerometer acquisition card, a data terminal storage card, a PC computer, and a power adapter. The drive system drives the connection between the whole machine test bench and the rolling bearing. The drive system drives the whole machine test bench and the rolling bearing to work. Multiple vibration sensors are arranged on the bearing seat of the rolling bearing. The vibration sensors are connected to the PC computer through the accelerometer acquisition card and the data terminal storage card.

2. The podded propeller bearing health monitoring device according to claim 1, characterized in that: When the drive system is given different operating speeds, the whole machine test bench will have different operating conditions, and the rolling bearings will work together with the whole machine test bench.

3. The podded propeller bearing health monitoring device according to claim 1, characterized in that: When the whole machine test bench is running, the vibration sensor obtains the running signal of the rolling bearing, and performs signal perception and transmission. The accelerometer acquisition card, data terminal storage card and PC are connected through the power adapter. The accelerometer acquisition card synchronously collects data as the rolling bearing runs. The data terminal memory card is used for data storage.

4. The podded propeller bearing health monitoring device according to claim 3, characterized in that: When the drive system drives the complete machine test bench, the data terminal storage card is used to compress and store the original vibration signal data from the accelerometer acquisition card through the PC computer, and to restore the compressed data from the data terminal storage card. The PC computer is used to analyze and process the restored original vibration signal to determine the health index data of the rolling bearing to be monitored; and based on the health index data, perform fault diagnosis on the rolling bearing to be monitored to obtain the fault diagnosis result of the rolling bearing to be monitored.

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