Main shaft structure of water turbine

Abstract

The main shaft structure of the water turbine comprises a main shaft, an upper flange, a lower flange and a connecting ring, the upper flange surrounds the outer side face of the upper end of the main shaft, the lower flange surrounds the outer side face of the lower end of the main shaft, and the connecting ring surrounds the outer side face of the main shaft and is arranged between the upper flange and the lower flange. The upper flange, the lower flange and the connecting ring are fixedly connected with the outer side face of the main shaft, the interior of the main shaft is hollow, and the section of the connecting ring is in a trapezoid shape. The utility model has the beneficial effects that the connection is firmer, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the relevant technical field of water turbines, in particular to a main shaft structure of a water turbine. Background Art

[0002] The main shaft of the turbine assumes the function of rotating connection of the turbine. As a rotating connection part, its main function is to ensure a firm connection and increase its service life. Utility Model Content

[0003] The utility model aims to overcome the shortcomings of the prior art in that the connection is not firm enough and the service life is not long enough, and provides a main shaft structure of a water turbine with a firmer connection and a longer service life.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A main shaft structure of a water turbine includes a main shaft, an upper flange, a lower flange and a connecting ring, wherein the upper flange surrounds the outer surface of the upper end of the main shaft, the lower flange surrounds the outer surface of the lower end of the main shaft, and the connecting ring surrounds the outer surface of the main shaft and is placed between the upper flange and the lower flange. The upper flange, the lower flange and the connecting ring are all fixedly connected to the outer side surface of the main shaft. The interior of the main shaft is hollow, and the cross-sectional shape of the connecting ring is trapezoidal.

[0006] When in use, the runner of the turbine is fixedly connected to the main shaft with one end of the lower flange, and the rotating part is fixedly connected to the main shaft and one end of the upper flange with a fixing part. If there are other connecting parts, they can be clamped on the connecting ring. The connecting ring also increases the strength of the main shaft, achieving a more secure connection and increasing the service life.

[0007] Preferably, the spindle is provided with a through hole, an inner shaft tube, and an inner through hole tube. There are several through holes, all of which are located on the outer side of the spindle. The through holes are connected to the interior of the spindle. The inner shaft tube is located in the spindle. The outer side of the inner shaft tube is fixedly connected to the inner side of the spindle. There are several inner through hole tubes, each corresponding to a through hole. The inner through hole tube is located in the through hole. The outer side of the inner through hole tube is fixedly connected to the inner side wall of the through hole. The inner through hole tube is connected to the interior of the inner shaft tube. The through hole allows water to flow through, reducing the pressure on the spindle caused by water pressure. The inner shaft tube and the inner through hole tube can reduce corrosion and other losses caused by water flow to the spindle.

[0008] Preferably, a clamping groove is provided on the upper end surface of the upper flange and the lower end surface of the lower flange. The clamping groove is annular in shape and centered on the main shaft. The inner sidewall of the clamping groove is provided with a plurality of triangular tooth grooves evenly distributed on the inner sidewall of the clamping groove. The clamping groove and the tooth grooves enhance the tightness of the connection.

[0009] Preferably, the upper flange is provided with mounting holes, and the mounting holes are multiple and evenly distributed on the outside of the slot with the main shaft as the axis. The mounting holes facilitate the connection of the main shaft with other components.

[0010] Preferably, the lower end surface of the upper flange is provided with a plurality of reinforcing ribs evenly distributed on the lower end surface of the upper flange with the main shaft as the axis. The reinforcing ribs are fixedly connected to the lower end surface of the upper flange, and the inner side of the reinforcing ribs is fixedly connected to the outer side of the main shaft. The upper end surface of the lower flange is provided with a reinforcing ring, which surrounds the outer side of the main shaft, and is fixedly connected to the upper end surface of the lower flange. The inner side of the reinforcing ring is fixedly connected to the outer side of the main shaft. The reinforcing ribs and the reinforcing ring are both used to strengthen the connection between the flange and the main shaft.

[0011] Preferably, the connecting ring is provided with latches, which are multiple and evenly distributed on the trapezoidal bevel of the connecting ring and are fixedly connected to the trapezoidal bevel of the connecting ring. The latches facilitate fixing other components that need to be connected to the connecting ring.

[0012] The beneficial effects of the utility model are: the connection is more firm and the service life is increased; the through hole allows water to pass through, reducing the pressure on the main shaft caused by water pressure, and the inner tube of the shaft and the inner tube of the through hole can reduce the corrosion and other losses caused by water flow to the main shaft; the grooves and tooth grooves increase the tightness of the connection; the mounting hole facilitates the connection between the main shaft and other components; the reinforcing ribs and reinforcing rings are both for increasing the connection between the flange and the main shaft; the teeth facilitate the fixation of other components that need to be connected to the connecting ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the utility model;

[0014] Figure 2 It is a bottom view of the utility model;

[0015] Figure 3 yes Figure 2 AA cross-section diagram;

[0016] Figure 4 yes Figure 2 An enlarged view of detail B;

[0017] Figure 5 yes Figure 3 Magnified view of detail C.

[0018] In the figure: 1. Main shaft, 2. Upper flange, 3. Lower flange, 4. Connecting ring, 5. Through hole, 6. Shaft inner tube, 7. Through hole inner tube, 8. Slot, 9. Tooth groove, 10. Mounting hole, 11. Reinforcement rib, 12. Reinforcement ring, 13. Tooth. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0020] like Figures 1 to 3 In an embodiment, a main shaft structure of a hydraulic turbine includes a main shaft 1, an upper flange 2, a lower flange 3 and a connecting ring 4. The upper flange 2 surrounds the outer surface of the upper end of the main shaft 1, the lower flange 3 surrounds the outer surface of the lower end of the main shaft 1, and the connecting ring 4 surrounds the outer surface of the main shaft 1 and is placed between the upper flange 2 and the lower flange 3. The upper flange 2, the lower flange 3 and the connecting ring 4 are all fixedly connected to the outer side surface of the main shaft 1. The interior of the main shaft 1 is hollow, and the cross-sectional shape of the connecting ring 4 is trapezoidal.

[0021] like Figure 3 and Figure 5 As shown, the main shaft 1 is provided with a through hole 5, an inner shaft tube 6 and a through-hole inner tube 7. There are several through holes 5 and they are all placed on the outer surface of the main shaft 1. The through hole 5 is connected with the interior of the main shaft 1. The inner shaft tube 6 is placed in the main shaft 1. The outer side surface of the inner shaft tube 6 is fixedly connected with the inner side surface of the main shaft 1. There are several through-hole inner tubes 7 and they correspond one to one with the through holes 5. The through-hole inner tube 7 is placed in the through hole 5. The outer side surface of the through-hole inner tube 7 is fixedly connected with the inner side wall of the through hole 5. The through-hole inner tube 7 is connected with the interior of the inner shaft tube 6.

[0022] like Figure 2 and Figure 4 As shown, a slot 8 is provided on the upper end surface of the upper flange 2 and the lower end surface of the lower flange 3. The slot 8 is annular in shape and centered on the main shaft 1. A tooth groove 9 is provided on the inner wall of the slot 8. The tooth groove 9 is triangular in shape. There are several tooth grooves 9 that are evenly distributed on the inner wall of the slot 8.

[0023] like Figure 1 、 Figure 2 and Figure 4 As shown, the upper flange 2 is provided with mounting holes 10 , and there are a plurality of mounting holes 10 that are evenly distributed on the outside of the slot 8 with the main shaft 1 as the axis.

[0024] like Figure 1 and Figure 3 As shown, a reinforcing rib 11 is provided on the lower end face of the upper flange 2. There are several reinforcing ribs 11 and they are evenly distributed on the lower end face of the upper flange 2 with the main shaft 1 as the axis. The reinforcing rib 11 is fixedly connected to the lower end face of the upper flange 2, and the inner side face of the reinforcing rib 11 is fixedly connected to the outer side face of the main shaft 1. A reinforcing ring 12 is provided on the upper end face of the lower flange 3. The reinforcing ring 12 surrounds the outer side face of the main shaft 1, and the reinforcing ring 12 is fixedly connected to the upper end face of the lower flange 3. The inner side face of the reinforcing ring 12 is fixedly connected to the outer side face of the main shaft 1.

[0025] like Figure 1 and Figure 3As shown, the connecting ring 4 is provided with latching teeth 13 , and there are a plurality of latching teeth 13 evenly distributed on the trapezoidal oblique side of the connecting ring 4 , and the latching teeth 13 are fixedly connected to the trapezoidal oblique side of the connecting ring 4 .

[0026] During use, the turbine's runner is fixedly connected to one end of the main shaft 1 via the lower flange 3. The slots 8 and teeth 9 on the lower flange 3 enhance the tightness of the connection, preventing slippage. The rotating member is fixedly connected to one end of the main shaft 1 and the upper flange 2 via a fixing member. Similarly, the slots 8 and teeth 9 on the upper flange enhance the tightness of the connection. The addition of mounting holes 10 further enhances the stability of the connection. If other connecting parts are required, they can be clipped onto the connecting ring 4. The teeth 13 prevent the connected parts from slipping. The connecting ring 4 also increases the strength of the main shaft. When water flows into the main shaft 1 through the through-holes 5 and then flows out from both ends of the main shaft 1, reducing the pressure on the main shaft 1. The inner tubes 6 and the inner tubes 7 on the through-holes reduce corrosion damage to the main shaft 1 caused by water flow. The reinforcing ribs 11 on the upper flange 2 and the reinforcing ring 12 on the lower flange 3 both enhance the stability of the connection between the flange and the main shaft 1, achieving a more secure connection and increasing service life.

Claims

1. A main shaft structure of a water turbine, characterized in that: The invention comprises a main shaft (1), an upper flange (2), a lower flange (3) and a connecting ring (4), wherein the upper flange (2) surrounds the outer surface of the upper end of the main shaft (1), the lower flange (3) surrounds the outer surface of the lower end of the main shaft (1), and the connecting ring (4) surrounds the outer surface of the main shaft (1) and is placed between the upper flange (2) and the lower flange (3). The upper flange (2), the lower flange (3) and the connecting ring (4) are all fixedly connected to the outer side surface of the main shaft (1). The interior of the main shaft (1) is hollow, and the cross-section of the connecting ring (4) is trapezoidal.

2. The main shaft structure of a water turbine according to claim 1, characterized in that: The main shaft (1) is provided with a through hole (5), an inner shaft tube (6) and an inner through hole tube (7). There are a plurality of through holes (5) and all of them are placed on the outer side of the main shaft (1). The through hole (5) is communicated with the interior of the main shaft (1). The inner shaft tube (6) is placed in the main shaft (1). The outer side surface of the inner shaft tube (6) is fixedly connected to the inner side surface of the main shaft (1). There are a plurality of inner through hole tubes (7) and they correspond one to one with the through holes (5). The inner through hole tube (7) is placed in the through hole (5). The outer side surface of the inner through hole tube (7) is fixedly connected to the inner side wall of the through hole (5). The inner through hole tube (7) is communicated with the interior of the inner shaft tube (6).

3. The main shaft structure of a water turbine according to claim 1, characterized in that: A clamping groove (8) is provided on the upper end surface of the upper flange (2) and the lower end surface of the lower flange (3). The clamping groove (8) is annular in shape and centered on the main shaft (1). A tooth groove (9) is provided on the inner side wall of the clamping groove (8). The tooth groove (9) is triangular in shape. There are a plurality of tooth grooves (9) that are evenly distributed on the inner side wall of the clamping groove (8).

4. The main shaft structure of a water turbine according to claim 3, characterized in that: The upper flange (2) is provided with mounting holes (10), and the mounting holes (10) are in a plurality and are evenly distributed on the outside of the slot (8) with the main shaft (1) as the axis.

5. The main shaft structure of a water turbine according to claim 1, characterized in that: A reinforcing rib (11) is provided on the lower end surface of the upper flange (2), and the reinforcing ribs (11) are in plurality and are evenly distributed on the lower end surface of the upper flange (2) with the main shaft (1) as the axis. The reinforcing rib (11) is fixedly connected to the lower end surface of the upper flange (2), and the inner side surface of the reinforcing rib (11) is fixedly connected to the outer side surface of the main shaft (1). A reinforcing ring (12) is provided on the upper end surface of the lower flange (3), and the reinforcing ring (12) surrounds the outer side surface of the main shaft (1). The reinforcing ring (12) is fixedly connected to the upper end surface of the lower flange (3), and the inner side surface of the reinforcing ring (12) is fixedly connected to the outer side surface of the main shaft (1).

6. The main shaft structure of a water turbine according to claim 1, characterized in that: The connecting ring (4) is provided with latch teeth (13), and the latch teeth (13) are in multiple numbers and evenly distributed on the trapezoidal oblique side of the connecting ring (4). The latch teeth (13) are fixedly connected to the trapezoidal oblique side of the connecting ring (4).

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