Hydraulic turbine generator set with cantilever movable guide vanes

Abstract

A hydraulic turbine generator set with cantilever movable guide vane, the outlet chamber is fixedly installed on the volute at the outlet of the runner, the fixed guide vane and the movable guide vane are concentrically installed in the center of the outlet of the volute in sequence, the guide vane shaft of the movable guide vane is installed on the top cover through the volute and is uniformly distributed along the axis, the end of the guide vane shaft is fixed with a plug-in rotating arm, the plug-in rotating arm is connected with an angle adjusting mechanism, the runner is concentrically installed in the volute at the outlet of the movable guide vane, the runner is fixed on one end of the main shaft through the drain cone, the other end of the main shaft passes through the volute through the shaft seal and the bearing, and is fixed in the center of the bearing bracket through the bearing, one end of the bearing bracket is connected with the top cover concentrically and is horizontally fixed on the base, the end part of the main shaft extending from one end of the bearing bracket is connected with the motor shaft of the generator through the coupling. The design is scientific and reasonable, easy to produce and manufacture, low in production cost, can well adapt to the requirements of energy recovery site, can generate electricity by the energy wasted in the pressure reduction process, is energy-saving and environment-friendly, has good economic and social benefits.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic turbines, and in particular to a hydraulic turbine generator set with cantilevered movable guide vanes. Background Technology

[0002] In fluid transport pipelines in the energy, chemical, and municipal sectors, pressure reduction processes are widespread. Using hydraulic turbines to recover the energy wasted during pressure reduction offers significant economic and carbon emission reduction benefits. However, there is currently a lack of dedicated waste energy recovery equipment on the market. Some studies have used pump reversal as a hydraulic turbine, but due to structural deficiencies, it suffers from low operating efficiency and high vibration. Miniaturizing conventional water turbines for waste energy recovery has drawbacks such as complex structure, high manufacturing difficulty, and difficulty in serialization. All of these factors have hindered the promotion and application of waste energy recovery. Therefore, there is an urgent need to research a hydraulic turbine generator set to meet market demand, but no relevant public reports have been found to date. Utility Model Content

[0003] In view of the above situation and to overcome the defects of the existing technology, the purpose of this utility model is to provide a hydraulic turbine generator set with cantilevered movable guide vanes, which can effectively solve the problem of the lack of waste energy recovery equipment for hydraulic turbines.

[0004] To achieve the above objectives, the technical solution provided by this utility model is a hydraulic turbine generator set with cantilevered movable guide vanes, comprising a volute, fixed guide vanes, movable guide vanes, a generator, and a water outlet chamber. The water outlet chamber is fixedly mounted on the volute at the outlet of the impeller. Fixed guide vanes and movable guide vanes are concentrically mounted in sequence within the center of the outlet of the volute. The guide vane shaft of the movable guide vane passes through the volute and is mounted on the top cover and evenly distributed along the axis. A plug-in rotating arm is fixed to the end of the guide vane shaft and is connected to an angle adjustment mechanism. A impeller is concentrically mounted in the volute at the outlet of the movable guide vane. The impeller is fixed to one end of the main shaft via a drain cone. The other end of the main shaft passes through the volute via a shaft seal and a bearing, and is fixed in the center of a bearing bracket via a bearing. One end of the bearing bracket is concentrically connected to the top cover and horizontally fixed on the base. The end of the main shaft extending out of the bearing bracket is connected to the motor shaft of the generator via a coupling.

[0005] This utility model has a simple structure, a scientific and reasonable design, is easy to manufacture, has low production costs, is easy to install, and can well adapt to the requirements of waste energy recovery sites. It generates electricity from the energy wasted during the decompression process, which is energy-saving and environmentally friendly, and has good economic and social benefits. Attached Figure Description

[0006] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0007] Figure 2 This is the front view of this utility model.

[0008] Figure 3 This is a schematic diagram of the cantilever movable guide vane of this utility model. Detailed Implementation

[0009] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings and specific circumstances.

[0010] As shown in the accompanying drawings, a hydraulic turbine generator set with cantilevered movable guide vanes includes a volute, fixed guide vanes, movable guide vanes, a generator, and a water outlet chamber. The water outlet chamber 5 is fixedly mounted on the volute 1 at the outlet of the impeller 4. Fixed guide vanes 2 and movable guide vanes 3 are concentrically mounted in the center of the outlet of the volute 1. The guide vane shaft 3-2 of the movable guide vane 3 passes through the volute 1 and is mounted on the top cover and evenly distributed along the axis. The end of the guide vane shaft 3-2 is fixed with a push-pull rotating arm 6, which is connected to an angle adjustment mechanism. The impeller 4 is concentrically mounted in the volute 1 at the outlet of the movable guide vane 3. The impeller 4 is fixed to one end of the main shaft 8 via a drain cone. The other end of the main shaft 8 passes through the volute 1 via a shaft seal and a bearing, and is fixed in the center of the bearing bracket 9 via a bearing. One end of the bearing bracket 9 is concentrically connected to the top cover and horizontally fixed on the base 11. The end of the main shaft 8 extending out of the bearing bracket 9 is connected to the motor shaft of the generator 10 via a coupling.

[0011] To ensure better implementation results, the angle adjustment mechanism includes a drive ring 7, a push-pull rod 13, a rocker arm 15, an output shaft 14, and an actuator 12 (a commercially available product). The guide vane shaft 3-2 of the guide vane 3-1 of the movable guide vane 3 passes through the volute 1 and is mounted on the top cover and evenly distributed along the axis. Each guide vane shaft 3-2 has a fixed insertion and withdrawal arm 6 at its end. Each insertion and withdrawal arm 6 is connected to one end of a corresponding connecting plate on the annular drive ring 7. One of the connecting plates on the drive ring 7 is fixedly connected to the push-pull rod 13. The push-pull rod 13 is connected to one end of the rocker arm 15 via a pin shaft. The other end of the rocker arm 15 is connected to the output shaft 14 of the actuator 12, forming a transmission structure.

[0012] The volute 1 adopts a rectangular equal-height cross section from the inlet to the nose end, and is composed of two side plates and a spiral steel plate welded together. The side plates are directly connected to the base 11. The use of an equal-height volute helps to ensure the overall rigidity of the equipment and has advantages such as simple flow channel structure and less welding work.

[0013] The impeller 4 is of mixed flow, oblique flow, or axial flow type.

[0014] The bearing bracket 9 is centrally mounted on the volute 1 and fixed on the base 11, which can effectively ensure the alignment accuracy of the shaft system and help increase the reliability of the unit's operation.

[0015] The water outlet chamber 5 is fixed on the volute 1 and separated from the impeller chamber to prevent the water outlet chamber from being affected by external forces, which would directly transmit the force to the impeller chamber and cause deformation, thus affecting the operation of the impeller 4.

[0016] In practical use, the water first enters the volute 1 and forms a flow field distributed along the circumference at the outlet of the volute. Then, it flows through the fixed guide vane 2 and the movable guide vane 3 in sequence, forming a flow field evenly distributed along the circumference. After the water flows through the impeller 4, the energy is converted into rotational mechanical energy, which drives the generator 10 to produce electrical energy through the main shaft 8.

[0017] The movable guide vane 3 is a cantilever structure. The bottom rings of the guide vane 3-1 are clearance-fitted, which makes it easy to change the height of the guide vane by cutting. The guide vane shaft 3-2 is mounted on the top cover and is evenly distributed along the central axis. The end of the guide vane shaft 3-2 is fixed with a push-pull rotating arm 6. The drive ring 7 pushes the guide vane 3-1 to rotate under the action of the actuator 12. It has the characteristics of low fit requirements and simple structure.

[0018] The hydraulic turbine generator set with cantilevered movable guide vanes of this invention has shown good results in field experiments. Relevant information is as follows:

[0019] Excess energy exists during the decompression process in a certain chemical plant. Currently, valves are used to dissipate this energy, which is then lost as noise and vibration. This excess energy could be recovered. To reduce investment, a hydraulic turbine generator set with cantilevered guide vanes is proposed. The unit has a design flow rate of 4500 t / h, a design head of 8 m, and a power generation of 70-90 kW. The unit uses a constant-height volute casing, simplifying manufacturing. The outlet chamber is fixed to the casing, preventing external forces from being transmitted to the runner chamber and causing deformation, which would affect the runner's operation. Furthermore, the guide vanes use a cantilever structure with a shaft at one end, facilitating cutting and adjusting the vane height, reducing installation difficulty. Finally, the bearing bracket is fixed to the top cover to ensure alignment accuracy. The unit operates stably, offers good economic benefits, and its carbon emission reduction effect is significant.

[0020] This utility model features a unique design, flexible operation, and a high degree of automation. Compared with existing technologies, it has the following advantages:

[0021] (1) A hydraulic turbine generator set with cantilevered movable guide vanes adopts a volute with equal height, which simplifies the manufacturing difficulty; the water outlet chamber is fixed on the shell to avoid the water outlet chamber being subjected to external forces, which are transmitted to the runner chamber and cause deformation, affecting the operation of the runner; in addition, the guide vanes adopt a cantilever structure with a shaft at one end, which makes it easy to cut and change the blade height, reducing the difficulty of installation; finally, the bearing bracket is fixed at the center on the top cover, which helps to ensure the centering accuracy.

[0022] (2) A hydraulic turbine generator set with cantilever movable guide vanes, wherein the guide vane structure is a cantilever structure, which makes it easy to change the height of the guide vane by cutting. The guide vanes are evenly installed on the top cover and evenly distributed along the central axis. The end of the guide vane shaft is fixed with a push-pull rotating arm. The drive ring pushes the guide vane to rotate under the action of the actuator. It has the characteristics of low matching requirements and simple structure.

[0023] (3) A hydraulic turbine generator set with cantilevered movable guide vanes is adopted. It has comprehensive advantages such as simple production, quick installation, small welding workload and easy maintenance. It can well meet the requirements of the waste energy recovery site, generate electricity from the energy wasted in the decompression process, save energy and protect the environment, and has good economic and social benefits.

[0024] It should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Any person skilled in the art who can make changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model's technical solution shall fall within the protection scope of the present utility model.

Claims

1. A hydraulic turbine generator unit with cantilevered movable vanes, comprising a spiral case, fixed vanes, movable vanes, a generator and a draft tube, characterized in that, The water outlet chamber (5) is fixedly mounted on the volute (1) at the outlet of the impeller (4). Fixed guide vanes (2) and movable guide vanes (3) are concentrically mounted in the center of the outlet of the volute (1). The guide vane shaft (3-2) of the movable guide vane (3) passes through the volute (1) and is mounted on the top cover and evenly distributed along the axis. The end of the guide vane shaft (3-2) is fixed with a push-to-pull arm (6). The push-to-pull arm (6) is connected to the angle adjustment mechanism. The impeller (4) is concentrically mounted in the volute (1) at the outlet of the movable guide vane (3). The impeller (4) is fixed to one end of the main shaft (8) via a drain cone. The other end of the main shaft (8) passes through the volute (1) via a shaft seal and a bearing, and is fixed in the center of the bearing bracket (9) via a bearing. One end of the bearing bracket (9) is concentrically connected to the top cover and horizontally fixed on the base (11). The end of the main shaft (8) extending out of the bearing bracket (9) is connected to the motor shaft of the generator (10) via a coupling.

2. The hydrodynamic turbogenerator set with cantilevered wicket gate according to claim 1, characterized in that, The angle adjustment mechanism includes a drive ring (7), a push-pull rod (13), a rocker arm (15), an output shaft (14), and an actuator (12). The guide vane shaft (3-2) of the guide vane (3-1) of the movable guide vane (3) passes through the volute (1) and is mounted on the top cover and evenly distributed along the axis. Each guide vane shaft (3-2) has a fixed insertion and withdrawal arm (6) at its end. Each insertion and withdrawal arm (6) is connected to one end of the corresponding connecting plate on the annular drive ring (7). One of the connecting plates on the drive ring (7) is fixedly connected to the push-pull rod (13). The push-pull rod (13) is connected to one end of the rocker arm (15) via a pin shaft. The other end of the rocker arm (15) is connected to the output shaft (14) of the actuator (12), thus forming a transmission structure.

3. The hydrodynamic turbogenerator set with cantilevered wicket gate according to claim 1, characterized in that, The volute (1) has a rectangular equal-height cross section from the inlet to the nose, and is composed of two side plates and a spiral steel plate welded together. The side plates are directly connected to the base (11).

4. The hydraulic turbine generator set with cantilevered movable guide vanes according to claim 1, characterized in that, The impeller (4) is of mixed flow, oblique flow or axial flow type.

Images