Main shaft of hydraulic generator

Abstract

The utility model relates to the technical field of generators, and discloses a hydro-generator spindle which comprises a spindle piece, the outer side wall of the spindle piece is rotationally connected with a sealing sleeve through a sealing bearing, the two sides of the end of the spindle piece are each provided with two circulation channels, and a sealing plunger is fixedly inserted into the shaft wall of the spindle piece; the sealing plunger cuts off and seals the circulation channel on the same side, water passing grooves are formed in the two ends of the main shaft piece correspondingly, end seals are fixedly connected to the two ends of the main shaft piece correspondingly, two protruding blocks are integrally formed on the outer side wall of the sealing sleeve, and the two protruding blocks are located on the two sides of the sealing plunger correspondingly. And cavities are formed in the two convex blocks, and the two cavities are filled with heat conduction oil liquid. Heat of the end, located in the generator set, of the spindle can be dissipated in time, the temperature difference of the two ends of the spindle piece can be reduced, thermal fatigue is prevented, and the service life of the spindle is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of generators, and in particular to a main shaft of a hydro-generator. Background Art

[0002] A hydro-turbine generator is a generator that uses a turbine as the prime mover to convert water energy into electrical energy. When water flows through the turbine, the water energy is converted into mechanical energy. The turbine's rotating shaft drives the generator's rotor, converting mechanical energy into electrical energy for output. It is the main power equipment for hydropower stations to produce electricity.

[0003] At present, the main shaft is a very important component in a hydro-turbine generator. As a linkage shaft between the turbine blades and the generator set, its structure is very important. When the main shaft is in use, one end of the main shaft is connected to the turbine blades and the other end is located inside the generator set. The end of the main shaft located at the turbine blades will be in continuous contact with the water, so its temperature is relatively low. When the generator set is working, it will continuously generate high temperature. Therefore, the end of the main shaft located at the generator set will be in a high temperature state, resulting in a large temperature difference between the two ends of the main shaft, which may increase the thermal fatigue of the main shaft, and in severe cases may cause slight deformation of the main shaft, affecting the normal use of the main shaft and shortening the service life of the main shaft. Utility Model Content

[0004] The purpose of this application is to solve the problem in the prior art that there is a large temperature difference between the two ends of the main shaft, which may increase the thermal fatigue of the main shaft, and in severe cases cause slight deformation of the main shaft, affecting the normal use of the main shaft and shortening the service life of the main shaft, and to propose a main shaft for a hydro-turbine generator.

[0005] In order to achieve the above purpose, this application adopts the following technical solutions:

[0006] A main shaft of a hydro-turbine generator comprises a main shaft component, the outer wall of the main shaft component is rotatably connected with a sealing sleeve through a sealing bearing, two circulation channels are provided on both sides of the end of the main shaft component, and a sealing plunger is fixedly inserted on the shaft wall of the main shaft component, the sealing plunger cuts and seals the circulation channel on the same side, water grooves are provided at both ends of the main shaft component, and end seals are fixedly connected at both ends of the main shaft component, the outer wall of the sealing sleeve is integrally formed with two protrusions, and the two protrusions are respectively arranged on both sides of the sealing plunger, the interiors of the two protrusions are provided with cavities, the interiors of the two cavities are filled with heat transfer oil, the cavity walls of the two cavities are provided with connecting holes, one of the circulation channels is located at both sides of the sealing plunger and a liquid through hole is provided, the two protrusions are jointly installed with a circulating conveying mechanism, the inner wall of the sealing sleeve is fixedly installed with a first annular sealing rubber sleeve, and the position of the first annular sealing rubber sleeve and the sealing plunger are arranged correspondingly.

[0007] Preferably, the circulation conveying mechanism includes a micro pump fixedly arranged on the side wall of one of the protrusions, the suction end of the micro pump is connected to the cavity on the same side, and the output end of the micro pump is fixedly connected to an infusion tube, and the infusion tube is connected to the corresponding cavity.

[0008] Preferably, the side walls of the two end seals are fixedly mounted with plug-in columns, and each plug-in column is fixedly plugged with the end of the main shaft.

[0009] Preferably, second annular sealing rubber sleeves are fixedly connected to both sides of the inner wall of the sealing sleeve, and the two second annular sealing rubber sleeves are disposed against the shaft wall of the main shaft.

[0010] Preferably, two first sealing ring plates are fixedly sleeved on the outer side wall of the main shaft component, and the first annular sealing rubber sleeve is arranged between the two first sealing ring plates.

[0011] Preferably, a group of second sealing ring plates are fixedly sleeved on both ends of the shaft wall of the main shaft component, and two second sealing ring plates in the same group are respectively arranged on both sides of the second annular sealing rubber sleeve on the same side.

[0012] Preferably, a plurality of fixed brackets are fixedly mounted on the outer side wall of the sealing sleeve.

[0013] Compared with the prior art, the present application provides a main shaft of a hydro-turbine generator having the following

[0014] Beneficial effects:

[0015] The main shaft of the hydro-turbine generator, through the cooperation of the main shaft parts, sealing bearings, sealing sleeves, circulation channels, sealing plungers, water grooves, end seals, protrusions, cavities, heat-conducting oil, liquid holes, connecting holes, circulating conveying mechanisms and the first annular sealing rubber sleeve, can circulate the heat-conducting oil inside the main shaft, so that the heat at both ends of the main shaft can be exchanged with each other, which can not only help the heat at one end of the main shaft located inside the generator set to be dissipated in time, but also reduce the temperature difference at both ends of the main shaft parts, prevent thermal fatigue, and extend the service life of the main shaft.

[0016] Moreover, the parts not involved in the device are the same as the existing technology or can be implemented by using the existing technology. The present application can not only facilitate the timely dissipation of heat at one end of the main shaft located inside the generator set, but also reduce the temperature difference between the two ends of the main shaft, prevent thermal fatigue, and extend the service life of the main shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of a main shaft of a hydro-generator proposed in this application;

[0018] Figure 2 A main shaft of a hydro-generator proposed in this application Figure 1 A magnified view of the structure of part A.

[0019] In the figure: 1, main shaft; 2, sealing bearing; 3, sealing sleeve; 4, circulation channel; 5, sealing plunger; 6, water trough; 7, end seal; 8, bump; 9, cavity; 10, heat transfer oil; 11, first annular sealing rubber sleeve; 12, micro pump; 13, infusion tube; 14, plug-in column; 15, second annular sealing rubber sleeve; 16, first sealing ring plate; 17, second sealing ring plate; 18, fixed bracket; 19, liquid hole. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0021] Reference Figure 1 and Figure 2 A main shaft of a hydro-turbine generator comprises a main shaft member 1, the outer wall of the main shaft member 1 is rotatably connected with a sealing sleeve 3 through a sealing bearing 2, two circulation channels 4 are provided on both sides of the end of the main shaft member 1, and a sealing plunger 5 is fixedly inserted into the shaft wall of the main shaft member 1, and the sealing plunger 5 cuts off and seals the circulation channel 4 on the same side, water grooves 6 are provided at both ends of the main shaft member 1, and end seals 7 are fixedly connected at both ends of the main shaft member 1, and two protrusions 8 are integrally formed on the outer wall of the sealing sleeve 3, and the two protrusions 8 are respectively arranged on both sides of the sealing plunger 5, cavities 9 are provided inside the two protrusions 8, and the interiors of the two cavities 9 are filled with heat transfer oil 10, and the cavity walls of the two cavities are provided with connecting holes, one of the circulation channels 4 is located at both sides of the sealing plunger 5. A liquid through hole 19 is provided, and the two protrusions 8 are jointly installed with a circulating conveying mechanism, and a first annular sealing rubber sleeve 11 is fixedly installed on the inner wall of the sealing sleeve 3, and the first annular sealing rubber sleeve 11 is arranged corresponding to the position of the sealing plunger 5.

[0022] The circulating conveying mechanism includes a micro pump 12 fixedly arranged on the side wall of one of the protrusions 8. The suction end of the micro pump 12 is connected to the cavity 9 on the same side. The output end of the micro pump 12 is fixedly connected to an infusion tube 13, and the infusion tube 13 is connected to the corresponding cavity 9. When the micro pump 12 is working, it can suck the oil inside the cavity 9 on one side and transport it to the inside of the other cavity 9 through the infusion tube 13.

[0023] The side walls of the two end seals 7 are fixedly mounted with plug-in columns 14, and each plug-in column 14 is fixedly plugged with the end of the main shaft member 1. Through this arrangement, the connection strength between the end seals 7 and the main shaft member 1 can be improved.

[0024] Second annular sealing rubber sleeves 15 are fixedly connected to both sides of the inner wall of the sealing sleeve 3, and the two second annular sealing rubber sleeves 15 are arranged to abut against the shaft wall of the main shaft member 1. Through this arrangement, the sealing effect at the two sealing bearings 2 can be improved.

[0025] Two first sealing ring plates 16 are fixedly sleeved on the outer side wall of the main shaft 1, and the first annular sealing rubber sleeve 11 is arranged between the two first sealing ring plates 16. This arrangement can improve the sealing effect of the first annular sealing rubber sleeve 11.

[0026] A set of second sealing ring plates 17 are fixedly sleeved on both ends of the shaft wall of the main shaft member 1, and two second sealing ring plates 17 in the same set are respectively arranged on both sides of the second annular sealing rubber sleeve 15 on the same side. Through this arrangement, the sealing effect of the second annular sealing rubber sleeve 15 can be improved.

[0027] A plurality of fixing brackets 18 are fixedly mounted on the outer side wall of the sealing sleeve 3. This arrangement can facilitate fixing the sealing sleeve 3 to the outside of the housing of the generator set.

[0028] In the present application, when in use, the sealing sleeve 3 of the main shaft component 1 needs to be fixed on the outer casing of the generator set before use. When the main shaft component 1 is working, the micro pump 12 is started, and the micro pump 12 can suck out the heat transfer oil 10 inside the cavity 9 on one side, and transport it to the other cavity 9 through the infusion pipe 13. Then the heat transfer oil 10 will enter the sealing sleeve 3 through the liquid hole 19 on this side, and then enter the corresponding circulation channel 4 through the connecting hole on this side. The heat transfer oil 10 can enter another circulation channel 4 through the water groove 6, and circulate back to the cavity 9 through the reflux water groove 6, the connecting hole, and the liquid hole 19, so that the heat transfer oil 10 circulates. The heat transfer oil 10 can absorb the heat at one end of the main shaft component 1 located inside the generator set, and transport it to the end close to the turbine blades, so that the heat at the high-heat end of the main shaft component 1 can be dissipated, reducing the temperature difference between the two ends of the main shaft component 1.

[0029] The above is only a preferred specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed in the present application according to the technical solution and utility model concept of the present application, which should be covered by the protection scope of the present application.

Claims

1. A main shaft of a hydro-generator, comprising a main shaft member (1), characterized in that: The outer wall of the main shaft (1) is rotatably connected to a sealing sleeve (3) via a sealing bearing (2); two circulation channels (4) are provided on both sides of the end of the main shaft (1); and a sealing plunger (5) is fixedly inserted into the shaft wall of the main shaft (1); the sealing plunger (5) cuts off and seals the circulation channel (4) on the same side; water grooves (6) are provided at both ends of the main shaft (1); and end seals (7) are fixedly connected to both ends of the main shaft (1); the outer wall of the sealing sleeve (3) is integrally formed with two protrusions (8), and the two protrusions (8) are respectively located on the sealing plunger. The plug (5) is provided on both sides, and a cavity (9) is provided inside the two protrusions (8), and the interiors of the two cavities (9) are filled with heat transfer oil (10). The walls of the two cavities are provided with a connecting hole, and one of the circulation channels (4) is provided with a liquid hole (19) at a position on both sides of the sealing plunger (5). The two protrusions (8) are jointly equipped with a circulating conveying mechanism, and a first annular sealing rubber sleeve (11) is fixedly installed on the inner wall of the sealing sleeve (3), and the first annular sealing rubber sleeve (11) is arranged corresponding to the position of the sealing plunger (5).

2. A main shaft of a hydro-generator according to claim 1, characterized in that: The circulating conveying mechanism comprises a micro pump (12) fixedly arranged on the side wall of one of the protrusions (8), the suction end of the micro pump (12) being connected to the cavity (9) on the same side, and the output end of the micro pump (12) being fixedly connected to a liquid infusion tube (13), which is in communication with the corresponding cavity (9).

3. A main shaft of a hydro-generator according to claim 1, characterized in that: The side walls of the two end seals (7) are fixedly mounted with plug-in columns (14), and each plug-in column (14) is fixedly plugged into the end of the main shaft (1).

4. A main shaft of a hydro-generator according to claim 1, characterized in that: Second annular sealing rubber sleeves (15) are fixedly connected to both sides of the inner wall of the sealing sleeve (3), and the two second annular sealing rubber sleeves (15) are both arranged to abut against the shaft wall of the main shaft component (1).

5. The main shaft of a hydro-generator according to claim 1, characterized in that: Two first sealing ring plates (16) are fixedly sleeved on the outer side wall of the main shaft component (1), and the first annular sealing rubber sleeve (11) is arranged between the two first sealing ring plates (16).

6. A main shaft of a hydro-generator according to claim 4, characterized in that: A group of second sealing ring plates (17) are fixedly sleeved on both ends of the shaft wall of the main shaft component (1), and two second sealing ring plates (17) in the same group are respectively arranged on both sides of the second annular sealing rubber sleeve (15) on the same side.

7. A main shaft of a hydro-generator according to claim 1, characterized in that: A plurality of fixed hangers (18) are fixedly mounted on the outer side wall of the sealing sleeve (3).

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