Single-hook Turning Method for Axial Flow Paddle Turbine Runner

Abstract

The invention discloses a movable propeller turbine runner single hook turning method. The problems that a device used in an existing method is complex in structure, high in cost, difficult to operate, poor in safety and low in working efficiency are solved. The movable propeller turbine rubber single hook turning method comprises the following steps that 1, a plurality of holes in first and second hangers are connected with a hub hole in a runner through bolts, hinge seat holes in two base plates are connected with a steel wire rope of a sling, and a hole in a base plate of a third hanger is connected with a lower hub hole of the runner of a turbine through a bolt; 2, the runner is hoisted to a first support from an installation station, and a coaxial hole in the two side walls of a slot at the upper end of a stand column of the first support is connected with a first hole in a vertical plate of the third hanger through a pin shaft; and 3, an overhead crane slowly moves, meanwhile, a hook is released, and first-time 90-degree turning is completed.

Description

Technical field: [0001] The invention relates to a method for turning over the runner of the water turbine when an axial flow paddle water turbine is installed on the site of a power station. Background technique: [0002] At present, the runners of most domestic axial-flow propeller turbines are inverted structures, that is, when the internal operating mechanism of the runner body is installed, the runners are in an upside-down state. After the installation is completed, turn the runner over as a whole, and then install the runner blades and other components. The turning over of the runner is an important link in the whole installation process of the runner. Because the weight of the runner is heavy and the center of gravity is difficult to grasp when turning over, turning over has a high risk. [0003] According to the electromechanical installation situation of various axial-flow power stations in China at present, most of the prior art adopts the double hook of the brid...

AI Technical Summary

Problems solved by technology

With the existing traditional way of turning over in the air, the force point moves on the edge of the hub at the beginning and end of turning over. The unbalanced force causes the wire rope and the bridge crane to frequently bear instantaneous impulse, which is extremely dangerous, and the hub body is easy to be injured. When turning over in the air, due to the transfer of the center of gravity, the hoisting control is difficult, and it is easy to cause the lifting point to be decoupled, and there is a great risk of equipment damage and personal injury accidents

[0004] Since the design of bridge cranes in hydropower stations needs to consider the upper and lower hoisting limits, in general, the cranes designed with double trolleys have a large distance between the two main hooks after they are combined, which is much larger than the distance between the two lifting points on the runner when turning over. When the wire rope deviates greatly, there is a risk of wire rope jumping. Therefore, the existing technology adopts the double hook of the bridge crane and the way of turning over in the air, which cannot meet the safety requirements of hoisting.

[0005] In addition, the existing traditional method of turning over in the air is also limited by the lifting equipment. Some power station bridge cranes are single-hook lifting equipment, and the method of turning over in the air cannot be completed. Therefore, the selection requirements for the bridge crane in the power station are more demanding High, the investment cost of the power station increases

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