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Pump turbine suitable for small pumped storage power station

A pumped-storage power station and pump-turbine technology, which is applied in the fields of hydroelectric power generation, energy conservation and emission reduction, and mechanical equipment, can solve the problems of long construction period, high geographical environment requirements, and difficulties in development and construction of large-scale pumped-storage power stations, and achieve wide application Foreground and promotional value, small size, small footprint effect

Active Publication Date: 2021-11-09
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Due to the current energy shortage, the utilization of renewable energy resources is increasing, but the instability of wind power and photovoltaics restricts their development, so it is urgent to improve the development and utilization of stable energy; the large-scale development and utilization of distributed energy in my country can be economically developed The large-scale hydropower resources in China are getting less and less. Although the sites of pumped-storage power stations in my country are unevenly distributed, the total amount is huge; the development and construction of large-scale pumped-storage power stations are difficult due to long construction period, large initial investment, and high geographical environment requirements.

Method used

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  • Pump turbine suitable for small pumped storage power station
  • Pump turbine suitable for small pumped storage power station
  • Pump turbine suitable for small pumped storage power station

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A variable-speed water pump-turbine of the present invention, which is suitable for the axial outlet flow of the volute water turbine in the working condition of the small pumped storage power station, and the axial inflow flow in the water pump working condition, is manufactured by using fluid machinery, fluid mechanics, calculation simulation and other theories; The water head (head) corresponding to different working conditions of the storage power station is designed.

[0038] Such as Figure 1 to Figure 8 As shown, the pump turbine of the present invention includes a volute 1, a fixed guide vane 2, a movable guide vane 3, a runner 4, a draft tube 5 and a rotating shaft 6, the volute 1, the fixed guide vane 2, the movable guide vane 3, the rotating shaft Wheel 4 and draft tube 5 are fixedly connected sequentially from top to bottom; movable guide vane 3 includes movable guide vane outer shell 9, movable guide vane inner shell 12 and movable guide vane blade 10 with ...

Embodiment 2

[0054] The difference between this embodiment and embodiment 1 is:

[0055] The volute axial flow variable speed pump-turbine designed for a small pumped-storage power station with 150 tons per hour, 12-meter water head under the turbine working condition, 12-meter head under the water pump working condition, and a speed of 1500 rpm. The working conditions of the hydropower station have an efficiency of more than 80%, especially the efficiency of the turbine working conditions is better, which fully meets the changing needs of the various working conditions of the power station.

[0056] The installation process of the present invention: will figure 2 The lower end of the volute 1 is opened as the water flow outlet of the hydraulic turbine, and the outer side passes through 12 The 10mm bolts are connected to the outer side of the fixed guide vane 2, and the inner side is composed of 6 The 10*22mm bolt is connected to the first inner blind hole 22 of the fixed guide vane 2...

Embodiment 3

[0063] The difference between this embodiment and embodiment 2 is:

[0064] Such as Figure 9 As shown, the blade of the fixed guide vane 2 is a three-dimensional twisted airfoil, the airfoil section located at the cylindrical surface of the hub of the fixed guide vane 2 outlet, the chord length is 107.47 mm, the maximum thickness of the airfoil is 8 mm, and the placement angle of the airfoil inlet is 35.1° (the included angle with the axial direction), the airfoil outlet placement angle is 37.83° (the included angle with the axial direction), the leading edge of the airfoil inlet adopts a blade-shaped inlet, and the trailing edge of the airfoil is a round head with a diameter of 7 mm; it is located at the outlet of the fixed guide vane The section of the airfoil at the middle cylindrical surface of the geometry, the chord length of the airfoil is 88.76 mm, the maximum thickness of the airfoil is 8 mm, the installation angle of the airfoil inlet is 39.4° (the angle with the ax...

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Abstract

The invention discloses a pump turbine suitable for a small pumped storage power station. According to the pump turbine suitable for the small pumped storage power station, a volute, a fixed guide vane, a movable guide vane, a rotating wheel and an outer shell of a draft tube are connected into a whole through bolts; two bearings are installed at the matched positions of the fixed guide vane and the movable guide vane respectively so as to support a rotating shaft; a rotating wheel blade adjusting mechanism is located inside a unit rotating wheel, and a movable guide vane blade adjusting mechanism is located outside a unit. Under the working condition of a water turbine, a pressurized water body flows through a volute and a guide vane area rotating wheel through a pressure pipeline, enters a rotating wheel area at a certain angle through guide vanes, impacts the rotating wheel and drives a shaft system to rotate, and energy of water flow is converted into rotating mechanical energy; water pump working conditions are opposite; the pump turbine is unique and compact in structure, small in size, small in occupied space and capable of achieving functions of forward power generation and reverse water pumping, and the forward efficiency and the reverse efficiency are both 84% or above.

Description

technical field [0001] The invention relates to the field of water pump turbines, in particular to a water pump turbine suitable for small pumped storage power stations. Background technique [0002] Due to the current energy shortage, the utilization of renewable energy resources is increasing, but the instability of wind power and photovoltaics restricts their development, so it is urgent to improve the development and utilization of stable energy; the large-scale development and utilization of distributed energy in my country can be economically developed The large-scale hydropower resources in China are getting less and less. Although the locations of pumped storage power stations in my country are unevenly distributed, the total amount is huge. The development and construction of large-scale pumped storage power stations are difficult due to long construction period, large initial investment, and high geographical environment requirements. Contents of the invention [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F03B13/06
CPCF03B13/06Y02E60/16Y02E10/20Y02P90/50Y02P80/10
Inventor 屈波水旭锋朱敏沈永成花港
Owner HOHAI UNIV