Ship propulsion shafting longitudinal vibration simulation test bench

Abstract

The invention discloses a test bed for simulating longitudinal vibration of a marine propulsion shafting. The test bed comprises a movable loading module (1), a base (12), a fixed loading module (3), a transmission shaft (4), a split coupling (6), a thrust bearing (7), an elastic coupling (8), a gearbox (10) and a frequency conversion motor (11). The fixed loading module (3), the transmission shaft (4), the split coupling (6), the thrust bearing (7), the elastic coupling (8), the gearbox (10) and the frequency conversion motor (11) are arranged on the base (12) in turn. The movable loading module (1) is connected with the fixed loading module (3) through an ejector rod (2) and used for supplying longitudinal alternating exciting force for simulating a propeller. The fixed loading module (3) is connected with one end of the transmission shaft (4). The other end of the transmission shaft (4) is connected with a thrust shaft of the thrust bearing (7) through the split coupling (6). The other end of the thrust shaft is connected with the output shaft of the gearbox (10) through the elastic coupling (8). The gearbox (10) is connected to the frequency conversion motor (11). The test beddisclosed by the invention has the advantages of compact structure, convenient operation, safety and reliability and can satisfy practical application requirements for teaching and researching.

Description

technical field [0001] The invention relates to a test bench for simulating ship propulsion shafting for teaching and scientific research, which can simulate the longitudinal vibration of ship propulsion shafting and other rotor shafting at any speed, so as to analyze and study the longitudinal vibration characteristics of the actual ship propulsion shafting , and at the same time, it is convenient to carry out performance tests of various longitudinal shock absorbers. Background technique [0002] Ship propulsion shafting is the core component of ship power propulsion device. The ship's propulsion shafting transmits the output power of the ship's main engine to the propeller, and at the same time transmits the thrust of the propeller to the hull to propel the ship to sail. Therefore, the ship's propulsion shafting needs to transmit a large torque and static thrust at the same time during the ship's navigation. On the other hand, the pulsating thrust caused by the uneven wa...

AI Technical Summary

Problems solved by technology

[0003] At present, domestic relevant colleges and universities already have ship propulsion shafting test benches that can be used for experimental teaching and scientific research, such as the marine diesel engine shafting test bench developed by Wang Chuanpu of Harbin Engineering University, etc. )), the main components of the test bench include diesel engine, electric dynamometer, thrust bearing, support bearing, propeller and circulating water tank, etc. The test bench can simulate multiple operating conditions of the shafting system, and focus on analyzing the lateral vibration of the propulsion shafting system , but the test bench needs to be equipped with a large-volume circulating water tank to provide the external water environment required for the propeller to generate excitation force, which is expensive, and the main circulating water pipe must be equipped with a flow stabilization device, which has a complex structure and reduces the test bench to a certain extent. Reliability; Wuhan University of Technology developed a shafting test bench focusing on the analysis of propeller shaft transmission bearing lubrication cooling and shafting bending vibration (theoretical and experimental research on the coupling of ship propeller shaft vibration and lubrication cooling, Wuhan University of Technology Doctoral Dissertation, 2005), The test bench is mainly composed of frequency conversion motor, simulated marine internal combustion engine crankshaft, intermediate shaft, propeller shaft, front and rear support bearings of propeller shaft, intermediate support bearings and propeller and other components

Due to different research focuses, there are certain differences in the components of the shafting test bench

Images