The invention relates to a durable hydraulic turbine, belonging to the hydraulic power generator, which arranges a oil box (1) in the machine room; the lubricant in the oil box; a oil pipe (4) on the bottom of oil box, while another end of oil pipe is arranged at the front of underwater blade (5). When in working, the lubricant in the oil box can via the oil pipe enter the water at the front of blade (5), then blade (5) will has a film of lubricant to prevent it from the abrasion of water, therefore, the service life of blade can be prolonged. |