Multi-speed pressurizing long-stroke feeding system for ocean engineering investigation

The invention relates to an ocean engineering investigation multi-speed pressurizing long-stroke feeding system which comprises two tackle assemblies, each tackle assembly comprises an oil cylinder, a tackle frame, a pulling wheel assembly and a pressurizing wheel, an oil cylinder barrel is fixedly arranged, a fixing plate on the lower portion of the tackle frame can slide along the oil cylinder barrel, and an oil cylinder rod body can drive the tackle frame to slide along the oil cylinder barrel when stretching out. The top ends of the two tackle plates are provided with pulling wheel assemblies through two upper clamping plates, and the bottom ends of the two tackle plates are each provided with a pressurizing wheel through a pair of lower clamping plates. According to the multi-speed pressurization long-stroke feeding system, accurate feeding of the heave compensation frame in the vertical direction can be achieved, pressurization or decompression can be achieved during operation, extra power supply is not