A type of cross-flow turbine main shaft sealing structure

Abstract

This utility model discloses a main shaft sealing structure for a cross-flow turbine unit, belonging to the technical field of sealing structures. It includes a cross-flow turbine unit body, with a main shaft body rotatably connected to one end of the main body. A protective sleeve is fitted onto the surface of the main shaft body. The main shaft body and the protective sleeve are rotatably connected via a sealed bearing. The protective sleeve and the cross-flow turbine unit body are connected via a connecting assembly. An alarm assembly is located below the protective sleeve. This utility model features a connecting assembly, which facilitates the installation of the protective sleeve. The structure is easy to use, requires no tools, and has simple steps. A rubber sealing ring facilitates sealing at the connection point. The alarm assembly allows for timely alerting of personnel when water enters. When water enters, the pressure is transmitted to a pressure sensor, which then transmits an electrical signal to the controller, thereby controlling a buzzer to sound and alert personnel.

Description

Technical Field

[0001] This utility model belongs to the field of sealing structure technology, specifically relating to a sealing structure for the main shaft of a cross-flow unit. Background Technology

[0002] Axial flow turbines are a type of hydroelectric power generation equipment suitable for low head and high flow scenarios. They are characterized by their compact structure and straight flow channels. The main function of the axial flow turbine's main shaft seal is to prevent river water in the flow channel from flowing back into the power plant during turbine operation. It is one of the key components of the turbine unit.

[0003] The existing cross-flow turbine unit main shaft sealing structure uses a protective sleeve to seal and protect the main shaft during use. However, the protective sleeve is installed using multiple bolts, making the installation inconvenient and requiring multiple steps with the aid of tools. Furthermore, while components such as hollow floats are used to promptly alert operators when water enters, the hollow floats are unstable and vibrations can cause them to shift, potentially triggering the switch. This makes the structure impractical. Utility Model Content

[0004] To address the problems mentioned in the background section, this invention provides a sealing structure for the main shaft of a cross-flow turbine unit, which allows for easy installation of the protective sleeve and timely alerts to operators in case of water ingress.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a sealing structure for the main shaft of a cross-flow turbine unit, including a cross-flow turbine unit body, a main shaft body rotatably connected to one end of the cross-flow turbine unit body, a protective sleeve covering the surface of the main shaft body, the main shaft body and the protective sleeve being rotatably connected by a sealing bearing, the protective sleeve and the cross-flow turbine unit body being connected by a connecting component, and an alarm component being provided below the protective sleeve;

[0006] The connecting assembly includes an internally threaded pipe seat, which is fixedly connected to one side of the main body of the axial flow unit. An externally threaded pipe seat is connected to the middle thread of the internally threaded pipe seat. A drive ring is fixedly connected to one side of the externally threaded pipe seat. The drive ring and the protective sleeve are rotatably connected through a rotating bearing. A guide assembly is provided on the surface of the internally threaded pipe seat.

[0007] Preferably, an auxiliary rotating rod is surrounded and fixedly connected to the surface of the drive ring, and a soft sleeve is fixedly fitted onto the surface of the auxiliary rotating rod.

[0008] Preferably, the guide assembly includes a support, which is disposed on the surface of the internally threaded pipe seat. The support and the internally threaded pipe seat are rotatably connected by a rotating bearing. A guide rod is symmetrically and fixedly connected to one side of the support.

[0009] Preferably, the drive ring has guide holes at both ends for engaging guide rods.

[0010] Preferably, a rubber sealing ring is fixedly connected to one end of the internally threaded pipe seat.

[0011] Preferably, the alarm component includes a mounting box, which is fixedly connected to the lower part of the protective cover. A pressure sensor is installed in the middle of the inside of the mounting box, and a support plate is fixedly connected above the pressure sensor. The support plate and the mounting box are slidably connected. A controller is installed in the lower part of the inside of the mounting box, and a mounting plate is installed below the mounting box. A buzzer is installed below the mounting plate.

[0012] Preferably, mounting screws are inserted at both ends of the mounting plate, and threaded holes for the mounting screws are opened at both ends of the mounting box below.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model achieves the effect of convenient installation of protective covers by setting up connecting components. The structure is easy to use, does not require tools, and the steps are simple. The rubber sealing ring facilitates sealing of the connection during connection.

[0015] 2. This utility model, by setting up an alarm component, achieves the effect of timely reminding staff when water enters. When water enters, the pressure is transmitted to the pressure sensor, and then the electrical signal is transmitted to the controller, thereby controlling the buzzer to emit a sound to remind the staff. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a cross-sectional schematic diagram of a portion of the structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the connecting component of this utility model;

[0019] Figure 4 This is a schematic diagram of the guide component in the connection assembly of this utility model;

[0020] Figure 5 This is a schematic diagram of the alarm component of this utility model.

[0021] In the diagram: 1. Main body of the cross-flow turbine unit; 2. Main shaft body; 3. Protective sleeve; 4. Sealed bearing; 5. Connecting assembly; 51. Internal threaded pipe seat; 52. External threaded pipe seat; 53. Drive ring; 54. Rotary bearing one; 55. Guide assembly; 56. Auxiliary rotating rod; 57. Soft sleeve; 58. Rubber sealing ring; 551. Support; 552. Rotary bearing two; 553. Guide rod; 6. Alarm assembly; 61. Mounting box; 62. Pressure sensor; 63. Support plate; 64. Controller; 65. Mounting plate; 66. Buzzer; 67. Mounting screw. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1:

[0024] Please see Figure 1-5 The present invention provides the following technical solution: a sealing structure for the main shaft of a cross-flow turbine unit, including a cross-flow turbine unit body 1, a main shaft body 2 rotatably connected to one end of the cross-flow turbine unit body 1, a protective sleeve 3 sleeved on the surface of the main shaft body 2, the main shaft body 2 and the protective sleeve 3 being rotatably connected by a sealing bearing 4, the protective sleeve 3 and the cross-flow turbine unit body 1 being connected by a connecting component 5, and an alarm component 6 being provided below the protective sleeve 3;

[0025] The connecting assembly 5 includes an internal threaded pipe seat 51, which is fixedly connected to one side of the main body 1 of the cross-flow unit. An external threaded pipe seat 52 is connected to the middle thread of the internal threaded pipe seat 51. A drive ring 53 is fixedly connected to one side of the external threaded pipe seat 52. The drive ring 53 and the protective sleeve 3 are rotatably connected by a rotating bearing 54. A guide assembly 55 is provided on the surface of the internal threaded pipe seat 51.

[0026] By adopting the above technical solution, the drive ring 53 is rotated under the action of the rotating bearing 54. The rotation of the drive ring 53 drives the external threaded pipe seat 52 to rotate, thereby connecting the internal threaded pipe seat 51 and the external threaded pipe seat 52 through a threaded connection, and installing the protective sleeve 3. This structure does not require tools or multiple steps and is easy to use.

[0027] Specifically, an auxiliary rotating rod 56 is fixedly connected around the surface of the drive ring 53, and a soft sleeve 57 is fixedly sleeved on the surface of the auxiliary rotating rod 56.

[0028] By adopting the above technical solution, the auxiliary rotating rod 56 is easy to drive without the need for tools, and the soft sleeve 57 helps to prevent hand pain during rotation.

[0029] Specifically, the guide assembly 55 includes a support 551, which is disposed on the surface of the internal threaded pipe seat 51. The support 551 and the internal threaded pipe seat 51 are rotatably connected by a rotating bearing 552. A guide rod 553 is symmetrically and fixedly connected to one side of the support 551.

[0030] By adopting the above technical solution, the guide rod 553 facilitates the guiding and positioning of the external threaded pipe seat 52 and the internal threaded pipe seat 51 during connection, preventing jamming due to misalignment of the threads at the beginning.

[0031] Specifically, the drive ring 53 has guide holes at both ends that cooperate with the guide rod 553.

[0032] By adopting the above technical solution, the guide hole can easily cooperate with the guide rod 553 for guidance.

[0033] Specifically, a rubber sealing ring 58 is fixedly connected to one end of the internally threaded pipe seat 51.

[0034] By adopting the above technical solution, the rubber sealing ring 58 facilitates the sealing between the internal threaded pipe seat 51 and the external threaded pipe seat 52.

[0035] In this embodiment, under the action of the rotating bearing 54, the drive ring 53 rotates, which in turn drives the external threaded pipe seat 52 to rotate, thereby connecting the internal threaded pipe seat 51 and the external threaded pipe seat 52 through a threaded connection, and installing the protective sleeve 3. This structure does not require tools or multiple steps, making it convenient to use. The auxiliary rotating rod 56 facilitates driving without the need for tools, and the soft sleeve 57 prevents hand pain during rotation. The guide rod 553 facilitates guidance and positioning when the external threaded pipe seat 52 and the internal threaded pipe seat 51 are connected, preventing jamming due to misalignment of the threads at the beginning. This device allows for easy connection and fixation of the protective sleeve 3 without the need for tools, making it convenient to use.

[0036] Example 2:

[0037] The difference between this embodiment and embodiment 1 is that, specifically, the alarm component 6 includes a mounting box 61, which is fixedly connected to the lower part of the protective sleeve 3. A pressure sensor 62 is installed in the middle of the inside of the mounting box 61. A support plate 63 is fixedly connected above the pressure sensor 62. The support plate 63 and the mounting box 61 are slidably connected. A controller 64 is installed in the lower part of the inside of the mounting box 61. A mounting plate 65 is installed in the lower part of the mounting box 61. A buzzer 66 is installed in the lower part of the mounting plate 65.

[0038] By adopting the above technical solution, when water enters, the pressure of the water flowing into the lower part of the protective sleeve 3 is transmitted to the support plate 63, and then to the pressure sensor 62. The pressure sensor 62 then transmits an electrical signal to the electrically connected controller 64, which in turn controls the electrically connected buzzer 66 to sound an alarm and remind the staff.

[0039] Specifically, mounting screws 67 are inserted at both ends of the mounting plate 65, and threaded holes for mating with the mounting screws 67 are opened at both ends of the mounting box 61.

[0040] By adopting the above technical solution, the mounting screw 67 and the threaded hole are matched, making it easy to remove the mounting plate 65 for component inspection and maintenance.

[0041] In this embodiment, when water enters, the pressure of the water flowing into the lower part of the protective sleeve 3 is transmitted to the support plate 63, and then to the pressure sensor 62. The pressure sensor 62 then transmits an electrical signal to the electrically connected controller 64, which in turn controls the electrically connected buzzer 66 to sound an alarm, alerting the staff. This makes the device easy to use and alerts people when water enters, and the structure is practical.

[0042] In this utility model, the pressure sensor 62 is a previously disclosed technology, and the selected model is MS583702BA01-50.

[0043] The buzzer 66 in this utility model is a previously disclosed technology, and the selected model is HC-9055.

[0044] The structure and working principle of the axial flow turbine main body 1, main shaft body 2, protective sleeve 3, and sealed bearing 4 in this utility model have been disclosed in a protective sleeve structure for the turbine side main shaft of a bulb axial flow turbine unit disclosed in Chinese patent application No. 202322809866.4. Its working principle is that the protective sleeve 3 facilitates the sealing and protection of the main shaft body 2.

[0045] The working principle and usage process of this utility model: In use, the protective sleeve 3 is installed via the connecting component 5, and the protective sleeve 3 seals and protects the main shaft body 2. When water enters, the alarm component 6 provides a warning. When using the connecting component 5, the drive ring 53 rotates under the action of the rotating bearing 54. The rotation of the drive ring 53 drives the external threaded pipe seat 52 to rotate, thus connecting the internal threaded pipe seat 51 and the external threaded pipe seat 52 via a threaded connection, allowing the protective sleeve 3 to be installed. This structure requires no tools or multiple steps, making it convenient to use. The auxiliary rotating rod 56 facilitates driving without tools, and the soft sleeve 57 prevents hand pain during rotation. The guide rod 553 facilitates the guiding and positioning of the external threaded pipe seat 52 and the internal threaded pipe seat 51 during connection, preventing jamming due to misalignment of the threads at the beginning. This allows the device to be easily connected and fixed to the protective sleeve 3 without the need for tools, making it convenient to use. When the alarm component 6 is in use, the pressure of the water flowing into the lower part of the protective sleeve 3 is transmitted to the support plate 63, and then to the pressure sensor 62. The pressure sensor 62 then transmits an electrical signal to the electrically connected controller 64, which in turn controls the electrically connected buzzer 66 to sound an alarm, alerting the staff. This makes the device easy to use and alerts people when water enters the system, demonstrating its practical structure.

[0046] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sealing structure for the main shaft of a axial flow turbine unit, comprising a main body (1) of the axial flow turbine unit, wherein a main shaft body (2) is rotatably connected to one end of the main body (1), a protective sleeve (3) is fitted on the surface of the main shaft body (2), and the main shaft body (2) and the protective sleeve (3) are rotatably connected by a sealing bearing (4), characterized in that: The protective sleeve (3) and the main body (1) of the cross-flow unit are connected by a connecting component (5), and an alarm component (6) is provided below the protective sleeve (3). The connecting assembly (5) includes an internal threaded tube seat (51), which is fixedly connected to one side of the main body (1) of the cross-flow unit. An external threaded tube seat (52) is connected to the middle thread of the internal threaded tube seat (51). A drive ring (53) is fixedly connected to one side of the external threaded tube seat (52). The drive ring (53) and the protective sleeve (3) are rotatably connected by a rotating bearing (54). A guide assembly (55) is provided on the surface of the internal threaded tube seat (51).

2. The seal structure of a tubular turbine unit main shaft according to claim 1, characterized in that: An auxiliary rotating rod (56) is fixedly connected around the surface of the drive ring (53), and a soft sleeve (57) is fixedly sleeved on the surface of the auxiliary rotating rod (56).

3. The seal structure of a tubular turbine unit main shaft according to claim 1, characterized in that: The guide assembly (55) includes a support (551), which is disposed on the surface of the internal threaded pipe seat (51). The support (551) and the internal threaded pipe seat (51) are rotatably connected by a rotating bearing (552). A guide rod (553) is symmetrically and fixedly connected to one side of the support (551).

4. The seal structure of a tubular turbine unit main shaft according to claim 3, characterized in that: The drive ring (53) has guide holes at both ends for cooperating with the guide rod (553).

5. The main shaft sealing structure of a axial flow turbine unit according to claim 1, characterized in that: A rubber sealing ring (58) is fixedly connected to one end of the internal threaded pipe seat (51).

6. The seal structure for the main shaft of a tubular turbine unit according to claim 1, characterized in that: The alarm component (6) includes a mounting box (61), which is fixedly connected to the bottom of the protective sleeve (3). A pressure sensor (62) is installed in the middle of the inside of the mounting box (61). A support plate (63) is fixedly connected above the pressure sensor (62). The support plate (63) and the mounting box (61) are slidably connected. A controller (64) is installed in the lower part of the inside of the mounting box (61). A mounting plate (65) is installed in the lower part of the mounting box (61). A buzzer (66) is installed in the lower part of the mounting plate (65).

7. A seal structure for a main shaft of a tubular turbine unit according to claim 6, characterized in that: The mounting plate (65) has mounting screws (67) inserted at both ends, and the mounting box (61) has threaded holes at both ends below the mounting screws (67) to accommodate the mounting screws (67).

Images