Multi-dimensional vibration reduction hydroelectric generation system

Abstract

The utility model discloses a multi-dimensional vibration reduction hydroelectric generation system which comprises a machine pier and a hydraulic turbine set installed on the machine pier, a shell of the hydraulic turbine set comprises an upper machine frame, a lower machine frame and a fan cover between the upper machine frame and the lower machine frame, and a vibration reduction mechanism I for vibration reduction in the horizontal direction and the vertical direction is installed between the lower machine frame and the machine pier. Vibration reduction mechanisms II for reducing vibration in the horizontal direction and the tangential direction of the fan cover are mounted between the fan cover and the machine pier; and the vibration reduction mechanisms I and the vibration reduction mechanisms II are arranged in a uniform circumferential array by taking the central axis of the hydraulic turbine set as the center. By reasonably arranging the form and the position of the vibration reduction mechanism, vibration reduction and energy consumption can be achieved in the horizontal direction, the vertical direction and the tangential direction, the vibration amplitude and the excitation frequency can be reduced under various working conditions, and the safety and the stability of a hydroelectric generation system are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vibration reduction in water conservancy projects, in particular to a multi-dimensional vibration reduction hydroelectric power generation system. Background Art

[0002] In the hydropower generation system, the pier is an important supporting structure of the turbine generator set, ensuring the smooth and stable operation of the turbine unit. The vibration load generated by the turbine unit when running at high speed is applied to the pier. The size of the load borne by the pier directly affects the dynamic response of the unit and is related to the safety of the entire plant unit.

[0003] With the gradual advancement of engineering technology, the capacity and structural size of the units in hydropower station projects are also increasing. The loads generated by the units during operation are transmitted to the plant through their supporting structures (such as the piers), which can easily cause structural resonance and pose a safety hazard.

[0004] In the prior art, the weight is balanced by increasing or decreasing the weight of components at different positions of the turbine unit, thereby reducing the vibration intensity. However, the hydraulic drive intensity changes all the time, and it is difficult to adapt to various working conditions by weight balance alone. Moreover, as time goes by, the previous weight balance scheme cannot adapt to new working conditions, and the workload of readjustment is huge, and the feasibility is poor. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a multi-dimensional vibration reduction hydroelectric power generation system, which can reduce vibration and energy consumption in the horizontal, vertical and tangential directions by reasonably arranging the form and position of the vibration reduction mechanism, reduce the vibration amplitude and excitation frequency under various working conditions, and improve the safety and stability of the hydroelectric power generation system.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a multi-dimensional vibration reduction hydroelectric power generation system, including a pier and a turbine unit installed on the pier, the outer shell of the turbine unit includes an upper frame, a lower frame and a wind cover between the upper frame and the lower frame, a vibration reduction mechanism I for horizontal and vertical vibration reduction is installed between the lower frame and the pier, and a vibration reduction mechanism II for horizontal and wind cover tangential vibration reduction is installed between the wind cover and the pier, and the arrangement of the vibration reduction mechanism I and the vibration reduction mechanism II are both in a uniform circular array with the central axis of the turbine unit as the center.

[0007] Preferably, a supporting foundation with a groove is built on the pier below the lower frame, and the vibration reduction mechanism I is installed in the groove. The vibration reduction mechanism I includes a longitudinal viscous damper and a transverse viscous damper that are hinged to each other. The hinge shafts of the longitudinal viscous damper and the transverse viscous damper are rotatably installed on the lower surface of the lower frame through transverse connecting pin seats, and the ends of the longitudinal viscous damper and the transverse viscous damper away from the hinge shaft are rotatably installed in the groove through transverse connecting pin seats.

[0008] Preferably, the extension line of the transverse viscous damper intersects with the central axis of the turbine unit, and the pin axis of the transversely connected pin seat is in the horizontal direction.

[0009] Preferably, the vibration reduction mechanism II includes a viscous damper, and both ends of the viscous damper are rotatably connected to the outer wall of the wind hood and the inner wall of the machine pier through longitudinal connecting pin seats.

[0010] Preferably, the pin axis of the longitudinally connected pin seat is in a vertical direction.

[0011] Preferably, the number of the vibration reduction mechanisms I and the number of the vibration reduction mechanisms II are both even numbers greater than or equal to 4.

[0012] The beneficial effect of adopting the above technical solution is that the utility model can reduce vibration and energy consumption in three dimensions: horizontal, vertical and tangential directions by reasonably arranging the form and position of the vibration reduction mechanism, reduce the vibration amplitude and excitation frequency under various working conditions, and improve the safety and stability of the hydropower generation system. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0014] Figure 1 It is a cross-sectional view of the utility model.

[0015] In the figure: 1, machine pier 2, upper frame 3, lower frame 4, wind cover 5, groove 6, supporting foundation 7, longitudinal viscous damper 8, transverse viscous damper 9, transverse connecting pin seat 10, viscous damper 11, longitudinal connecting pin shaft. DETAILED DESCRIPTION

[0016] See also Figure 1 The structure of a specific embodiment of the utility model includes a pier 1 and a turbine unit installed on the pier 1. The outer shell of the turbine unit includes an upper frame 2, a lower frame 3 and a wind cover 4 between the upper frame 2 and the lower frame 3. A vibration reduction mechanism I for reducing vibration in the horizontal and vertical directions is installed between the lower frame 3 and the pier 1. A vibration reduction mechanism II for reducing vibration in the horizontal direction and in the tangential direction of the wind cover 4 is installed between the wind cover 3 and the pier 1. The arrangement of the vibration reduction mechanism I and the vibration reduction mechanism II are both in a uniform circular array with the central axis of the turbine unit as the center.

[0017] A support foundation 6 with a groove 5 is built on the machine pier 1 below the lower frame 3, and the vibration reduction mechanism I is installed in the groove 5. The vibration reduction mechanism I includes a longitudinal viscous damper 7 and a transverse viscous damper 8 that are hinged to each other. The hinge shafts of the longitudinal viscous damper 7 and the transverse viscous damper 8 are rotatably installed on the lower surface of the lower frame 3 through a transverse connecting pin seat 9, and the ends of the longitudinal viscous damper 7 and the transverse viscous damper 8 away from the hinge shaft are rotatably installed in the groove 4 through a transverse connecting pin seat 8. The longitudinal viscous damper 7 can absorb the energy of longitudinal vibration, and the transverse viscous damper 8 can absorb the energy of horizontal vibration.

[0018] The extension line of the transverse viscous damper 8 intersects with the central axis of the turbine unit, and the pin axis of the transverse connecting pin seat 9 is in the horizontal direction. The transverse viscous damper 8 is directly opposite to the central axis and can receive horizontal vibration energy to the greatest extent.

[0019] The vibration reduction mechanism II includes a viscous damper 10, and the two ends of the viscous damper 10 are rotatably connected to the outer wall of the wind cover 4 and the inner wall of the pier 1 through a longitudinal connection pin seat 11. The viscous damper 10 of the vibration reduction mechanism II is installed in the upper middle part of the turbine unit to increase the sensitivity to vibration, which can not only assist in absorbing horizontal vibration energy, but also play a vibration reduction role when the turbine unit has rotational vibration.

[0020] The pin axis of the longitudinal connecting pin seat 11 is in the vertical direction.

[0021] The number of the vibration reduction mechanisms I and II is 4. An even number enables two-by-two relative arrangement to increase the coordination of work.

[0022] The above description is only proposed as an implementable technical solution of the present invention, and is not intended to be a single limitation on the technical solution itself.

Claims

1. A multi-dimensional vibration reduction hydroelectric power generation system, comprising a pier and a water turbine unit mounted on the pier, wherein the housing of the water turbine unit comprises an upper frame, a lower frame and a wind shield between the upper frame and the lower frame, characterized in that: A vibration reduction mechanism I for reducing vibration in horizontal and vertical directions is installed between the lower frame and the pier, and a vibration reduction mechanism II for reducing vibration in horizontal and tangential directions of the hood is installed between the wind shield and the pier. The arrangement of the vibration reduction mechanism I and the vibration reduction mechanism II are both in a uniform circular array centered on the central axis of the turbine unit.

2. The multi-dimensional vibration reduction hydroelectric power generation system according to claim 1, characterized in that: A supporting foundation with a groove is built on the machine pier below the lower frame, and the vibration reduction mechanism I is installed in the groove. The vibration reduction mechanism I includes a longitudinal viscous damper and a transverse viscous damper that are hinged to each other. The hinge shafts of the longitudinal viscous damper and the transverse viscous damper are rotatably installed on the lower surface of the lower frame through a transverse connecting pin seat, and the ends of the longitudinal viscous damper and the transverse viscous damper away from the hinge shaft are rotatably installed in the groove through a transverse connecting pin seat.

3. The multi-dimensional vibration reduction hydroelectric power generation system according to claim 2, characterized in that: The extension line of the transverse viscous damper intersects with the central axis of the turbine unit, and the pin shaft of the transverse connecting pin seat is in the horizontal direction.

4. The multi-dimensional vibration reduction hydroelectric power generation system according to claim 1, characterized in that: The vibration reduction mechanism II includes a viscous damper, and both ends of the viscous damper are rotatably connected to the outer wall of the wind cover and the inner wall of the machine pier through longitudinal connecting pin seats.

5. The multi-dimensional vibration reduction hydroelectric power generation system according to claim 4, characterized in that: The pin axis of the longitudinally connected pin seat is in the vertical direction.

6. The multi-dimensional vibration reduction hydroelectric power generation system according to claim 1, characterized in that: The number of the vibration reduction mechanisms I and the number of the vibration reduction mechanisms II are both even numbers greater than or equal to 4.

Images