Hydraulic loading device for large marine propulsion shafting test bed

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

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

The invention relates to a land full-scale marine propulsion shafting vibration transmission characteristic testing device. The full-scale marine propulsion shafting vibration transmission characteristic testing device is constituted by a basis platform, a direct current motor, a high elasticity coupling, a thrust bearing unit, a middle shaft, a propulsion shaft, a bow bearing, a midship bearing, a stern bearing, a propeller simulation block, an axial static thrust loading device, a dynamic force loading device, a torsion loading device, a sealing device, a shafting centering adjusting device, a bearing base dynamic force testing element, matched bases of various parts, and a lubricating and cooling device. The matched bases of the various parts are disposed on the basis platform, and the base is provided with the main parts and the matched fittings of the propulsion shafting. The axial static thrust loading, the axial and radial dynamic force loading, and the torsion load are realized during the rotation of the shafting, and at the same time, a shafting centering state adjusting function is provided, and bearing support reaction measurement, base vibration measurement, and shafting vibration and transmission characteristic tests in different centering states are realized.

Full-scale marine propulsion shafting vibration transmission characteristic testing device

The invention provides a simulation test platform for measuring thickness of an oil film between a cylinder sleeve and a piston of a diesel engine based on Gamma rays. The simulation test platform comprises a diesel engine cylinder sleeve-piston reciprocating motion simulating bench which is fixed on the test platform, a data acquisition device and a data processing device, wherein the diesel engine cylinder sleeve-piston reciprocating motion simulating bench comprises a diesel engine cylinder body, a cylinder sleeve matched with the cylinder body, a piston positioned in the cylinder sleeve and a bench power unit; the data acquisition device comprises an oil film thickness detection device; a collimation Gamma radioactive source device emits collimation Gamma rays, the emitted Gamma rays penetrate through the outer side of the piston skirt, the oil film and the cylinder sleeve, and are received by a probe, which is used for indicating the thickness of the oil film. According to the simulation test platform for measuring thickness of the oil film between the cylinder sleeve and the piston of the diesel engine based on Gamma rays, the cylinder sleeve does not need to be punched, and the collimation Gamma radioactive source device is embedded in the inner side of the piston skirt, so that the influence on the cylinder sleeve-piston is less, and in addition, as the Gamma rays are stable and immune to electromagnetic interference, the thickness of the oil film between the cylinder sleeve and the piston can be collected conveniently and effectively.

Simulation test platform for measuring thickness of oil film between cylinder sleeve and piston of diesel engine based on Gamma rays

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.

Yan Xinping

Papers

Comprehensive test platform for marine shafting

Device for detecting thickness of oil film between cylinder sleeve and piston ring of diesel engine

Hydraulic loading device for large marine propulsion shafting test bed