A centrifugal supercharged steam turbine end seal device

Abstract

The utility model belongs to steam seal technical field of steam turbine especially relates to a centrifugal supercharged steam turbine end steam seal device, including base, rotating sleeve, rotor main shaft and first bolt etc. Two rotor main shafts are placed in the inside of base and rotate in parallel distribution, one rotating sleeve is fixedly connected to the end of two rotor main shafts away from each other, rotating sleeve and base rotate and contact, and the end of two rotor main shafts close to each other is connected through a plurality of first bolts. By setting up lubricating component, the pressure change caused by piston reciprocating motion is used to cooperate with first check valve and second check valve to carry out accurate control, so that the automatic absorption, stable transportation and accurate injection of lubricating oil are achieved, so that the rotating sleeve is sufficiently lubricated during continuous operation, the excessive wear between the rotating sleeve and the base is effectively reduced, the maintenance cost and downtime of the device are greatly reduced, and the operation efficiency and reliability of the device are improved.

Description

Technical Field

[0001] This utility model belongs to the field of steam turbine sealing technology, and particularly relates to a centrifugal booster steam turbine end sealing device. Background Technology

[0002] A steam turbine is a power device that converts the thermal energy of steam into mechanical energy. It uses high-pressure steam to drive turbine blades, which in turn power generators or other mechanical equipment. Steam turbines are widely used in power plants, ship propulsion systems, and industrial processes for power supply. A steam seal is a key component used to reduce or prevent steam leakage between the turbine rotor and casing. It is typically installed at the end of the turbine to ensure that steam flows along the designed path and avoids unnecessary energy loss.

[0003] However, in actual operation, due to the high speed of the steam turbine, the key components of the steam sealing device (such as the rotor shaft and the steam seal base) will have continuous relative motion. This dynamic contact is prone to excessive friction, which leads to increased wear on the surface of the components and shortens their service life. At the same time, the frequent wear of components will not only significantly increase the frequency of maintenance, making maintenance work heavy and complicated, but also seriously interfere with the continuous and stable operation of the steam turbine due to the long downtime required for each maintenance, reducing its overall operating efficiency and increasing operating costs.

[0004] Therefore, there is a particular need for a centrifugal booster turbine end steam seal device to solve the above problems. Utility Model Content

[0005] In order to overcome the shortcomings of ordinary steam sealing devices, such as the easy wear of components due to excessive friction during high-speed operation, which increases the frequency of maintenance and downtime, reduces operating efficiency and increases operating costs, this utility model provides a centrifugal booster steam turbine end steam sealing device.

[0006] This utility model is achieved through the following technical means: a centrifugal booster turbine end steam seal device, including a base, a rotating sleeve, a rotor main shaft, a first bolt, a nut, a frame, a second bolt, and a lubrication assembly. Two rotor main shafts are arranged side by side and rotated inside the base. A rotating sleeve is fixed to the ends of the two rotor main shafts that are far apart from each other. The rotating sleeves are in rotatable contact with the base. The ends of the two rotor main shafts that are close to each other are connected by multiple first bolts. One end of each first bolt is fastened by a nut. The frame is installed on the upper part of the shell by multiple second bolts and covers the two rotor main shafts and the two rotating sleeves. The lubrication assembly is set on the frame.

[0007] To further explain, the lubrication assembly includes a cylinder, a motor, a rotating rod, a movable rod, a piston, a connecting pipe, a first one-way valve, a nozzle, a channel pipe, a second one-way valve, a housing, and a cover plate. The cylinder is fixed to the top of the frame. The motor is installed on the upper side of the cylinder, with its output shaft extending to the left. The rotating rod is fixed to the output shaft of the motor. The piston is slidably disposed inside the cylinder. The movable rod is rotatably disposed between the rotating rod and the piston. Two symmetrically distributed connecting pipes are fixed to one end of the cylinder. Each connecting pipe has a first one-way valve installed inside its end connected to the cylinder. Two nozzles are installed side by side on the frame. The connecting pipes are connected to the corresponding nozzles. The nozzle nozzles are aligned with the corresponding rotating sleeves. The channel pipe is fixed to one end of the cylinder. A second one-way valve is installed inside its end connected to the cylinder. The housing is installed on the upper side of the frame. The end of the channel pipe away from the cylinder is connected to the bottom of the housing. The cover plate is rotatably disposed on the upper part of the housing and closes the upper opening of the housing.

[0008] To further explain, it also includes a shim, which is placed between the two rotor spindles.

[0009] To further explain, a sealing gasket is wrapped around the outer ring surface of the piston that contacts the cylinder.

[0010] To further clarify, the motor is a geared motor.

[0011] To further explain, a pull block is provided at the top of the cover plate.

[0012] Beneficial effects: By setting up a lubrication component, the pressure changes caused by the reciprocating motion of the piston are used to coordinate with the first and second check valves for precise control, achieving automatic absorption, stable delivery and precise injection of lubricating oil. This ensures that the rotating sleeve receives sufficient lubrication during continuous operation, effectively reducing excessive wear between the rotating sleeve and the base, significantly reducing the maintenance cost and downtime of the device, and improving the operating efficiency and reliability of the device. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0014] Figure 2 This is a partial sectional view of the frame and rotor spindle components of this utility model.

[0015] Figure 3 This is a partial sectional view of the cylindrical component of this utility model.

[0016] Figure 4 This is a partial sectional view of the box-shaped component of this utility model.

[0017] In the attached diagram: 1. Base, 2. Rotating sleeve, 3. Rotor shaft, 4. Shim, 5. First bolt, 51. Nut, 6. Frame, 7. Second bolt, 8. Cylinder, 9. Motor, 10. Rotating rod, 11. Movable rod, 12. Piston, 13. Connecting pipe, 14. First check valve, 15. Nozzle, 16. Channel pipe, 17. Second check valve, 18. Box, 19. Cover plate. Detailed Implementation

[0018] Example: A centrifugal booster steam turbine end seal device, such as Figures 1-4 As shown, the device includes a base 1, a rotating sleeve 2, a rotor shaft 3, a gasket 4, a first bolt 5, a nut 51, a frame 6, a second bolt 7, and a lubrication assembly. Two rotor shafts 3 are arranged side by side and rotate inside the base 1. A rotating sleeve 2 is fixedly connected to the ends of the two rotor shafts 3 that are far apart from each other. The rotating sleeve 2 rotates in contact with the base 1, achieving relative rotation while ensuring sealing. The ends of the two rotor shafts 3 that are close to each other are connected by multiple first bolts 5. The right end of each first bolt 5 is tightened by a nut 51, making the two rotor shafts 3 firmly connected. The gasket 4 is placed between the two rotor shafts 3 to increase the sealing at the connection point of the two rotor shafts 3, preventing leakage during operation. It can also buffer the vibration between the two rotor shafts 3 to a certain extent and protect the rotor shafts 3. The frame 6 is bolted to the upper part of the housing by multiple second bolts 7 and covers the two rotor shafts 3 and the two rotating sleeves 2. The lubrication assembly is set on the frame 6.

[0019] like Figures 1-4As shown, the lubrication assembly includes a cylinder 8, a motor 9, a rotating rod 10, a movable rod 11, a piston 12, a connecting pipe 13, a first one-way valve 14, a nozzle 15, a channel pipe 16, a second one-way valve 17, a housing 18, and a cover plate 19. The cylinder 8 is fixedly connected to the top of the frame 6. The motor 9 is bolted to the upper front side of the cylinder 8, with its output shaft extending to the left. The rotating rod 10 is fixedly connected to the output shaft of the motor 9 and rotates synchronously with the rotation of the motor 9. The piston 12 is slidably disposed inside the cylinder 8. A sealing gasket is wrapped around the outer ring surface of the piston 12 in contact with the cylinder 8 to prevent lubricating oil from leaking from the gap between the piston 12 and the cylinder 8 during the movement of the piston 12. The movable rod 11 is rotatably disposed between the rotating rod 10 and the piston 12, serving to transmit motion and convert the rotational motion of the rotating rod 10 into the linear motion of the piston 12. The motor 9 is a geared motor, which can provide a stable and appropriate speed, ensuring that the movement speed of the piston 12 is moderate and guaranteeing lubrication. The lubricating oil is sprayed out evenly and stably. Two symmetrically distributed connecting pipes 13 are fixedly connected to the rear end of the cylinder 8. Each connecting pipe 13 has a first one-way valve 14 inside its end connected to the cylinder 8, allowing lubricating oil to flow only into the connecting pipe 13 and preventing backflow of lubricating oil into the cylinder 8. Two nozzles 15 are bolted side-by-side to the frame 6. The connecting pipes 13 are connected to the corresponding nozzles 15, and the nozzles of the nozzles 15 are aligned with the corresponding rotating sleeves 2, enabling precise spraying of lubricating oil onto the rotating sleeves 2. The channel pipe 16 is fixedly connected to the rear end of the cylinder 8. A second one-way valve 17 is provided inside the end of the channel pipe 16 connected to the cylinder 8, which only allows lubricating oil to be smoothly discharged from the channel pipe 16 into the cylinder 8, preventing the lubricating oil from flowing back. The box body 18 is bolted to the upper rear side of the frame 6. The end of the channel pipe 16 away from the cylinder 8 is connected to the bottom of the box body 18. The cover plate 19 is rotatably set on the upper part of the box body 18 and closes the upper opening of the box body 18. A pull block is provided on the top of the cover plate 19.

[0020] The operator first rotates the cover plate 19 to open the housing 18, pours an appropriate amount of lubricating oil into the housing 18, and then rotates the cover plate 19 in the opposite direction to reset it and close the housing 18. When the steam turbine starts running, the two rotor main shafts 3 drive the rotating sleeve 2 to rotate in the base 1. At this time, the motor 9 start button is pressed, and the motor 9 starts to run. Its output shaft drives the rotating rod 10 to rotate. The rotating rod 10 drives the piston 12 to make regular reciprocating linear motion in the cylinder 8 through the connection of the movable rod 11.

[0021] When piston 12 moves forward, the internal space of cylinder 8 increases, creating a negative pressure environment. Under the action of the pressure difference, the second one-way valve 17 automatically opens, connecting the channel pipe 16. The lubricating oil in the housing 18 flows smoothly into cylinder 8 through the channel pipe 16 and the second one-way valve 17. When piston 12 moves backward, it exerts a squeezing effect on the lubricating oil in cylinder 8. Under the dual action of pressure and its own structure, the second one-way valve 17 closes, effectively blocking the channel pipe 16 and preventing the lubricating oil from flowing back. At the same time, the lubricating oil with increased pressure in cylinder 8 opens the first one-way valve 14, connecting the connecting pipe 13, allowing the lubricating oil in cylinder 8 to quickly enter the connecting pipe 13. Finally, it is sprayed onto the rotating sleeve 2 through the nozzle 15, providing sufficient lubrication for the rotating sleeve 2, reducing friction between it and the base 1, and reducing wear. After piston 12 completes a suitable number of reciprocating movements, the operator presses the stop button on motor 9 to turn off motor 9.

Claims

1. A centrifugal supercharged steam turbine end gland device characterized by: The device includes a base (1), a rotating sleeve (2), a rotor spindle (3), a first bolt (5), a nut (51), a frame (6), a second bolt (7), and a lubrication assembly. Two rotor spindles (3) are arranged side by side and rotate inside the base (1). A rotating sleeve (2) is fixed to the ends of the two rotor spindles (3) that are far apart from each other. The rotating sleeve (2) rotates in contact with the base (1). The ends of the two rotor spindles (3) that are close to each other are connected by multiple first bolts (5). One end of each first bolt (5) is fastened by a nut (51). The frame (6) is installed on the upper part of the housing by multiple second bolts (7) and covers the two rotor spindles (3) and the two rotating sleeves (2). The lubrication assembly is set on the frame (6).

2. A centrifugal supercharged steam turbine end gland assembly according to claim 1, characterised in that: The lubrication assembly includes a cylinder (8), a motor (9), a rotating rod (10), a movable rod (11), a piston (12), a connecting pipe (13), a first one-way valve (14), a nozzle (15), a channel pipe (16), a second one-way valve (17), a housing (18), and a cover plate (19). The cylinder (8) is fixed to the top of the frame (6). The motor (9) is installed on the upper side of the cylinder (8), with its output shaft extending to the left. The rotating rod (10) is fixed to the output shaft of the motor (9). The piston (12) is slidably disposed inside the cylinder (8). The movable rod (11) is rotatably disposed between the rotating rod (10) and the piston (12). Two symmetrically distributed connecting pipes are fixed to one end of the cylinder (8). (13) Each connecting pipe (13) is connected to the cylinder (8) and has a first one-way valve (14) inside. Two nozzles (15) are installed side by side on the frame (6). The connecting pipe (13) is connected to the corresponding nozzle (15). The nozzle (15) is aligned with the corresponding rotating sleeve (2). The channel pipe (16) is fixed to one end of the cylinder (8). The end of the channel pipe (16) connected to the cylinder (8) is equipped with a second one-way valve (17). The box (18) is installed on the upper side of the frame (6). The end of the channel pipe (16) away from the cylinder (8) is connected to the bottom of the box (18). The cover plate (19) is rotatably set on the upper part of the box (18) and closes the upper opening of the box (18).

3. A centrifugal supercharged steam turbine end gland assembly according to claim 2, characterised in that: It also includes a shim (4), which is placed between the two rotor spindles (3).

4. The centrifugal booster turbine end steam seal device according to claim 3, characterized in that: A sealing gasket is wrapped around the outer ring surface of the piston (12) that contacts the cylinder (8).

5. The centrifugal booster turbine end steam seal device according to claim 4, characterized in that: The motor (9) is a geared motor.

6. The centrifugal booster turbine end steam seal device according to claim 5, characterized in that: A pull block is provided on the top of the cover plate (19).

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