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 belongs to the field of fluid mechanical experiments, and relates to a performance test device under a swing condition of a marine pump. The performance test device mainly comprises a swing table, the marine pump, a hydrophone, a pressure sensor, an acceleration sensor, a data acquisition instrument and a variable-frequency control cabinet, wherein the swing table comprises a swing frame, a drive motor, a speed reducer, a fly wheel, a bracket, a supporting plate, a positioning scale plate and a swing table base; the marine pump is fixed to the swing table through a foot bolt; the swing table is fixed to a cement base; and the variable-frequency control cabinet is utilized to control the drive motor, so that the swing table can be driven to operate. The performance test device can carry out external characteristic, vibration, noise and pressure pulse test under multiple working conditions, multiple angles of inclination and multiple swing periods and amplitudes of the marine pump. The performance test device is simple in structure, is convenient to mount, is wide in scope of application, is easy to operate, and is relatively high in precision, can carry out synchronous test for external characteristics, vibrations, noises and pressure pulse signals, so that effective means are provided for carrying out performance test under the inclination and swing conditions of the marine pump.

Performance test device under swing condition of marine pump

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 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

Provided is a water tank device used for water lubricating and cooling a ship shafting comprehensive performance testing platform. The water tank device comprises a stirring device, a water incoming pipe, a thermometer, a cooling water inlet, a liquid level meter, a cooling water outlet, a valve, a water pump, a water pump motor, a purge valve, a water tank, and a heater. The stirring device is composed of a stirring motor and a propeller. The stirring motor, the water incoming pipe, and the cooling water inlet are disposed on the top surface of the water tank body. The purge valve is arranged on the bottommost part of the left side of the water tank body. The liquid level meter is disposed on the outer side of the water tank body and in right front of the water tank body. The heater is disposed in the water tank. The bottom plate of the water tank body is arranged in a manner that the bottom plate is inclined upwardly round a purge valve opening used as a peak and an angle with two degree is form between the bottom plate and a horizontal plane. The water tank body of the water tank device is formed by welding stainless steel plates. A water pump interface is disposed in right front of the water tank. The water in the water tank is used for lubrication cooling the rear tail shaft of a ship shafting and cooling the lubricant passage way of a middle bearing and a thrust bearing via the water pump, and then is flowed back to the water tank via the cooling water inlet to form circulation.

Zhou Xincong

Papers

Comprehensive test platform for marine shafting

A water tank device used for water lubricating and cooling a ship shafting comprehensive performance testing platform