Hydraulic loading device for large marine propulsion shafting test bed

A novel ternary interpenetrating polymer networks based on NBR/PU/EP with outstanding damping and tribological properties for water-lubricated bearings

The invention provides a rotation torque, radial force and axial force comprehensive loading test method and device for a drive system. The method includes the steps that the rotating speed and the torque are provided by a driving and loading motor, so that rotation torque loading of the drive system is achieved; a radial force loading device oil cylinder is matched with a radial force loading device roller which is supported in the radial direction, so that radial force loading of the drive system is achieved; an axial force loading device oil cylinder is matched with an axial force loading device slip ring, so that axial force loading of the drive system is achieved; the torque and the rotating speed of the motor and the thrust of the radial force loading device oil cylinder and the axial force loading device oil cylinder can be controlled precisely by a control system, and thus the rotation torque, radial force and axial force comprehensive loading for the drive system can be realized.

Rotation torque, radial force and axial force comprehensive loading test method and device

An in-use gear-box wear-condition on-line visual monitoring system comprises a monitoring power supply, a constant temperature module, a sensor module, a data acquisition ARM module, data transmission and data remote analysis processing. The monitoring power supply is connected to the constant temperature module. The constant temperature module is connected to the sensor module and the data acquisition ARM module. The data acquisition ARM module is connected to the monitoring power supply, the sensor module and the data transmission respectively. The data transmission is connected to the data remote analysis processing. Real-time monitoring to a gear box wear state is realized and lubrication friction correlation data during an operation process is acquired. During a whole monitoring process, closed cycle is used when an oil liquid system is monitored, a return system of an over oil sample is monitored and an oil product is not damaged. An embedded ARM chip group is used as a data acquisition control module core so as to complete acquisition, control, transmission and other functions. Abnormal wear data is collected and analyzed as a picture form and a determination basis is provided for friction fault analysis.

In-use gear-box wear-condition visual monitoring system and monitoring method thereof

The invention provides an electromagnetic hydraulic comprehensive simulation test loading device for a shafting. The electromagnetic hydraulic comprehensive simulation test loading device for the shafting comprises a prime motor and a master control unit, wherein the prime motor and the master control unit are connected with each other through a first coupling; the prime motor is used for supplying power to a test shaft to enable the test shaft to rotate; the rotation speed of the prime motor is controlled by the master control unit; the electromagnetic hydraulic comprehensive simulation test loading device for the shafting also comprises an electromagnetic torque loading device, a hydraulic force loading device, a sensor detection and feedback unit and a hydraulic control unit, wherein the electromagnetic torque loading device generates magnetic force through a direct current to supply torque to the moving test shaft, the hydraulic force loading device comprises a radial force loading device and an axial force loading device, and the sensor detection and feedback unit is used for collecting the torque applied by the electromagnetic torque loading device, force applied by the hydraulic force loading device, and the speed of the test shaft. By adopting the electromagnetic hydraulic comprehensive simulation test loading device for the shafting, which is provided by the invention, the torque, the axial stress status and the radial stress status of the test shaft in a running process can be simulated, so as to carry out the reliability test of the test shaft.

Electromagnetic hydraulic comprehensive simulation test loading device for shafting

\n The use of condition monitoring and fault diagnosis (CMFD) in marine power systems significantly influences ship safety. This study divides the development of CMFD for marine power systems into three periods and reviews the content, state and limitations of CMFD research for each period. According to the research achievements and engineering experience of the authors’ team, typical application cases are introduced for CMFD in ships, including CMFD platforms on engineering ships, salvage ships, container ships and ro-ro ships powered by solar photovoltaic systems. Finally, prospective research directions are proposed for CMFD in marine power systems, considering the research status of CMFD and the trend toward intelligent and eco-friendly ships.

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Review of condition monitoring and fault diagnosis for marine power systems

The invention discloses a comprehensive test platform for a marine shafting, which mainly comprises a variable frequency motor, a speed reducer, a thrust bearing, a shafting and accessories, a loading device, a water lubricating unit, a hydraulic power unit, a monitoring and control unit, a foundation and a machine base, wherein the machine base is mounted on the foundation; various major components are mounted on the machine base; an output end of the variable frequency motor is connected with the speed reducer; the variable frequency motor drives the shafting and the accessories to rotate through a high elastic coupling; the loading device is arranged at a tail shaft of the shafting, and is communicated with a liquid way of the hydraulic power unit; a plurality of fixing supports are mounted in the shafting; the water lubricating unit is communicated with a tail bearing, intermediate bearings and a thrust bearing by water pipes; and the monitoring and control unit is used for controlling a test condition, monitoring the major moving components in a test process, and acquiring major test parameters. The test platform can measure data, such as an applied load, a bearing supporting force, shaft power, shafting vibration and a lubricating state of the tail bearing, so that bases are provided for optimum designs of structures and mounting modes of the shafting and the tail bearing.

Comprehensive test platform for marine shafting

The utility model provides an at visual monitoring system of state that weares and teares with gear box, includes: monitoring power supply, constant temperature module, sensor module, data acquisition ARM module, data transmission, data remote analysis handle, the constant temperature module is connected to the monitoring power supply, and sensor module and data acquisition ARM module are connected to the constant temperature module, and monitoring power supply, sensor module, data transmission are connected respectively to the data acquisition ARM module, and data transmission connects data remote analysis and handles Realize the real -time supervision of counter gear case wearing and tearing state, obtain it at the lubricated friction associated data of operation in -process, whole monitoring process adopts closed circulation supervising time measuring to the fluid system, monitor oily kind retrieval system again, does not carry out any damage to the oil, data are gathered and the analysis the inordinate wear with the picture form, provide the basis for estimation for the friction fault analysis

Yang Kun

Papers

Review of condition monitoring and fault diagnosis for marine power systems

Comprehensive test platform for marine shafting

In-use gear-box wear-condition visual monitoring system and monitoring method thereof

At visual monitoring system of state that weares and teares with gear box