Axial flow rotary paddle turbine runner single hook turning device

Abstract

The invention provides a Kaplan turbine wheel hook turning-over device. The problems of complex structure, high cost, difficult operation, low safety and low working efficiency in the existing device are solved. The Kaplan turbine wheel hook turning-over device comprises a sling, a first bracket, a second bracket, a first hanger, a second hanger, a third hanger, a forth hanger and at least one support, wherein the first and second brackets are composed of columns and bases, and the upper end of each column is provided with a groove; both side walls of the groove are provided with coaxial holes, and the first and second hangers are symmetrical; the cambered base plates of the first and second hangers are provided with hinged supports with holes, and a plurality of holes are formed on the inner circumference of the cambered base plates and fit to hub holes on a turbine wheel; the third hander is composed of a vertical plate and a base plate; the vertical plate is provided with a first hole and a second hole side by side, and holes in the circumference of two symmetrical arc edges of the base plate are fit to the lower hub holes of the turbine wheel; the fourth hanger is composed of the vertical plate and the base plate, the vertical plate is provided with the holes, and the holes in the circumference of the arc edges of the base plate are fit to the upper hub holes of the turbine wheel; and the support is used for supporting the turbine wheel.

Description

Technical field: [0001] The invention relates to the field of installation of electromechanical equipment in a hydropower station, in particular to an axial-flow type hydraulic turbine runner turn-over device. 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] At present, most of the electromechanical installations of domestic axial-flow power stations use the double hooks of bridge cranes and the way of turning...

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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