Water inflow prevention device of steam turbine

Abstract

The utility model belongs to the technical field of steam turbines, and particularly relates to a steam turbine waterproof device which comprises a cylindrical surrounding partition plate, the cylindrical surrounding partition plate is installed between a steam turbine oil seal and a steam turbine air seal, and a lateral guide face is arranged on the bottom wall of the cylindrical surrounding partition plate. In the isolation application state when the steam turbine runs, the operation motor, the transmission lead screw and the guide rail sliding way are matched in a sliding mode to drive the middle connecting piece to move transversely, so that the baffle movable spacer is arranged at the connecting position of the oil seal and the rotating shaft for steam blocking, and in the current state, a communicating state is formed between the through hole and the cylindrical surrounding partition plate; in the using state, steam and moisture formed after being blocked by the baffle movable spacer flow from the lateral guide face to the through-drainage hole and are directly guided out towards the outer side, and in the non-using state, an operation motor, a transmission lead screw and a guide rail sliding way are matched in a sliding mode to drive the middle connecting piece to move transversely. And the baffle plate movable spacer is arranged right above the through and discharge hole to isolate the steam discharge hole.

Description

Technical Field

[0001] This utility model belongs to the field of steam turbine technology, and specifically relates to a steam turbine water ingress prevention device. Background Technology

[0002] A steam turbine, also known as a steam engine, is a rotary steam power unit. High-temperature, high-pressure steam passes through a fixed nozzle, becomes an accelerated airflow, and is then injected onto the blades, causing the rotor, which is equipped with rows of blades, to rotate and perform work. Excessive water content in the turbine oil is a common fault in power plants. High water content can lead to oil emulsification. To avoid this, existing technology uses baffles along the oil seal to block water vapor. However, this method has a problem: water vapor descending along the baffle still accumulates at the connection between the oil seal and the gas seal, posing a risk of seepage over time. Therefore, its practical application is not ideal. Utility Model Content

[0003] This invention provides a steam turbine anti-water ingress device to solve the problems mentioned in the background art.

[0004] This utility model provides the following technical solution: a turbine anti-water ingress device, comprising a cylindrical surrounding baffle plate, the cylindrical surrounding baffle plate being installed between the turbine oil seal and the turbine gas seal, the bottom wall of the cylindrical surrounding baffle plate having a lateral guide surface, an intermittent airflow blocking assembly being fixedly connected to the inner side of the cylindrical surrounding baffle plate, two symmetrically distributed baffle movable partitions being slidably connected to the top of the intermittent airflow blocking assembly, and an intermittent opening and closing actuator being fixedly connected to the outer wall of the cylindrical surrounding baffle plate, the number of the intermittent opening and closing actuator corresponding to the number of the baffle movable partitions, the baffle movable partitions being slidably connected to the intermittent opening and closing actuator via an intermediate connecting piece.

[0005] The intermittent airflow blocking assembly includes a flow outlet base and a time control switch. The time control switch is embedded in the inner wall of the flow outlet base, and the flow outlet base is fixedly connected to the cylindrical surrounding partition.

[0006] The intermittent opening and closing execution component includes a working motor, a transmission screw, and a guide rail slide. The outer housing of the working motor is fixedly connected to the cylindrical surrounding partition. The transmission screw is fixedly connected to the output end of the working motor. The guide rail slide is fixedly connected to the cylindrical surrounding partition. One end of the intermediate connecting piece is slidably connected to the inner side of the guide rail slide.

[0007] The cylindrical surrounding partition is provided with a movable guide groove, and a compression sealing cavity is fixedly connected to one side of the inner wall of the movable guide groove. The other end of the compression sealing cavity is fixedly connected to the intermediate connecting piece.

[0008] The movable baffle is sleeved on the outside of the turbine shaft and does not contact the outer wall of the turbine shaft.

[0009] The discharge seat has two sets of symmetrically distributed discharge holes, and the baffle movable partition is used for sliding opening and closing of the discharge holes.

[0010] The beneficial effects of this utility model are as follows: In the isolated application state during turbine operation, the intermediate connecting piece is moved laterally by the sliding cooperation of the working motor, transmission screw, and guide rail slide, so that the movable baffle is placed at the connection between the oil seal and the rotating shaft to block steam. In the current state, the vent hole and the cylindrical surrounding baffle are in a conductive state. Steam and moisture formed after being blocked by the movable baffle flow through the lateral guide towards the vent hole and are directly discharged to the outside. In the non-use state, the intermediate connecting piece is moved laterally by the sliding cooperation of the working motor, transmission screw, and guide rail slide, so that the movable baffle is placed directly above the vent hole to isolate the steam discharge port, maintaining the dustproof sealing of the interior of the cylindrical surrounding baffle cavity in the non-use state. Thus, through the bidirectional switching method, dual protection is achieved for the turbine oil seal and gas seal, reducing the phenomenon of seepage.

[0011] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0013] Figure 2 This is a cross-sectional view of the present invention;

[0014] Figure 3 for Figure 1 A structural diagram from another perspective.

[0015] In the diagram: 1. Cylindrical surrounding partition; 11. Lateral guide surface; 12. Movable guide groove; 13. Compression sealing cavity; 2. Intermittent airflow blocking assembly; 21. Through-hole seat; 22. Time control switch; 23. Through-hole; 3. Intermittent opening and closing actuator assembly; 31. Working motor; 32. Transmission screw; 33. Guide rail slide; 4. Baffle movable partition; 41. Intermediate connecting piece. Detailed Implementation

[0016] Please see Figures 1-3The present invention provides the following technical solution: a turbine anti-water ingress device, comprising a cylindrical surrounding baffle 1, the cylindrical surrounding baffle 1 being installed between the turbine oil seal and the turbine gas seal, the bottom wall of the cylindrical surrounding baffle 1 having a lateral guide surface 11, an intermittent airflow blocking component 2 being fixedly connected to the inner side of the cylindrical surrounding baffle 1, two symmetrically distributed baffle movable partitions 4 being slidably connected to the top of the intermittent airflow blocking component 2, and an intermittent opening and closing execution component 3 being fixedly connected to the outer wall of the cylindrical surrounding baffle 1, the number of intermittent opening and closing execution components 3 corresponding to the number of baffle movable partitions 4, and the baffle movable partitions 4 being slidably connected to the intermittent opening and closing execution component 3 through an intermediate connecting piece 41.

[0017] In this embodiment, to address the problem that existing technologies use isolation baffles for steam blocking, where water vapor descends along the baffle and the resulting moisture accumulates at the connection between the oil seal and the gas seal, posing a risk of long-term vapor accumulation and potential for penetration, this invention employs a cylindrical surrounding baffle 1, an intermittent airflow blocking component 2, and an intermittent opening and closing actuator 3 to achieve a switchable isolation method.

[0018] The intermittent airflow blocking assembly 2 includes a flow outlet seat 21 and a time control switch 22. The time control switch 22 is embedded in the inner wall of the flow outlet seat 21, and the flow outlet seat 21 is fixedly connected to the cylindrical surrounding partition 1.

[0019] In this embodiment, the time control switch 22 is signal connected to the working motor 31. The time control switch 22 sets the conduction time and closing time of the discharge hole 23. After the set conduction time and closing time are reached, the time control switch 22 sends the corresponding control command to the working motor 31.

[0020] The intermittent opening and closing execution component 3 includes a working motor 31, a transmission screw 32, and a guide rail slide 33. The outer housing of the working motor 31 is fixedly connected to the cylindrical surrounding partition 1. The transmission screw 32 is fixedly connected to the output end of the working motor 31. The guide rail slide 33 is fixedly connected to the cylindrical surrounding partition 1. One end of the intermediate connecting piece 41 is slidably connected to the inner side of the guide rail slide 33.

[0021] Four sets of movable baffles are installed on the outside of the turbine shaft and do not contact the outer wall of the turbine shaft.

[0022] The discharge seat 21 has two sets of symmetrically distributed discharge holes 23, and the baffle movable partition 4 is used for sliding opening and closing of the discharge holes 23.

[0023] In this embodiment, to maintain the stability of the intermediate connecting piece 41 during sliding, the guide rail slide 33 restricts the movement path of the intermediate connecting piece 41. When the working motor 31 drives the transmission screw 32 through threaded transmission, the intermediate connecting piece 41 moves parallel to its arrangement path under the threaded action of the transmission screw 32. The intermediate connecting piece 41 drives the baffle movable partition 4 to switch between the opening and closing states of the through hole 23. The inner side of the intermediate connecting piece 41 has a threaded hole adapted to the transmission screw 32, and the transmission screw 32 passes through the threaded hole of the intermediate connecting piece 41 and is threadedly connected to it.

[0024] The cylindrical enclosure partition 1 has a movable guide groove 12. A compression sealing cavity 13 is fixedly connected to one side of the inner wall of the movable guide groove 12. The other end of the compression sealing cavity 13 is fixedly connected to the intermediate connecting piece 41.

[0025] In this embodiment, when the intermediate connecting piece 41 slides along the arrangement path set by the guide rail slide 33, the compression sealing cavity 13 will adapt to the movement of the intermediate connecting piece 41 and undergo sliding deformation. By maintaining the closure of the movable guide groove 12 through the compression sealing cavity 13, the intermediate connecting piece 41 will not be restricted by sliding. At the same time, when the turbine is not in operation, the upper end of the cylindrical surrounding partition 1 is still in a closed state.

[0026] The working principle of this utility model is as follows: This utility model has two operating states. In the isolated application state during turbine operation, the intermediate connecting piece 41 is moved laterally by the sliding cooperation of the working motor 31, the transmission screw 32, and the guide rail slide 33. This causes the movable baffle 4 to be positioned at the connection between the oil seal and the rotating shaft to block steam. In this state, the vent hole 23 and the cylindrical surrounding baffle 1 are in a conductive state. Steam and moisture formed after being blocked by the movable baffle 4 flow from the lateral guide surface 11 to the vent hole 23 and are directly discharged to the outside. In the non-application state, the intermediate connecting piece 41 is moved laterally by the sliding cooperation of the working motor 31, the transmission screw 32, and the guide rail slide 33. This causes the movable baffle 4 to be positioned directly above the vent hole 23 to isolate the steam discharge port, maintaining the dustproof and sealed interior of the cylindrical surrounding baffle 1 cavity in the non-application state. To prevent the time control switch 22 from being submerged in water during water flow, the exposed part of the time control switch 22, after being installed on the vent seat 21, is sealed with epoxy resin.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A water intrusion prevention device for a steam turbine comprising a cylindrical containment bulkhead (1) mounted between the oil seal and the gas seal of the steam turbine, characterised in that: The bottom wall of the cylindrical surrounding partition plate (1) is provided with a lateral guide surface (11), the inside of the cylindrical surrounding partition plate (1) is fixedly connected with an intermittent airflow shielding assembly (2), the top of the intermittent airflow shielding assembly (2) is slidably connected with two symmetrically distributed baffle movable partitions (4), the outer wall of the cylindrical surrounding partition plate (1) is fixedly connected with an intermittent opening and closing execution assembly (3), the number of the intermittent opening and closing execution assembly (3) corresponds to that of the baffle movable partitions (4), and the baffle movable partitions (4) are slidably connected with the intermittent opening and closing execution assembly (3) through intermediate connecting plates (41).

2. A water ingress prevention device for a steam turbine as claimed in claim 1, characterised in that: The intermittent airflow shielding assembly (2) comprises a through hole (21) and a time control switch (22), the time control switch (22) is embedded in the inner wall of the through hole (21), and the through hole (21) is fixedly connected with the cylindrical surrounding partition plate (1).

3. A water ingress prevention device for a steam turbine as claimed in claim 1, characterised in that: The intermittent opening and closing execution assembly (3) comprises a working motor (31), a transmission screw rod (32) and a guide rail slide (33), the outer shell of the working motor (31) is fixedly connected with the cylindrical surrounding partition plate (1), the transmission screw rod (32) is fixedly connected with the output end of the working motor (31), the guide rail slide (33) is fixedly connected with the cylindrical surrounding partition plate (1), and one end of the intermediate connecting plate (41) is slidably connected to the inside of the guide rail slide (33).

4. A water ingress prevention device for a gas turbine according to claim 3, characterised in that: The cylindrical surrounding partition plate (1) is provided with a movable guide groove (12), one side of the inner wall of the movable guide groove (12) is fixedly connected with a compression sealing leather cavity (13), and the other end of the compression sealing leather cavity (13) is fixedly connected with the intermediate connecting plate (41).

5. A water ingress prevention device for a steam turbine as claimed in claim 1, characterised in that: The baffle movable partitions (4) are sleeved outside the turbine rotating shaft and do not contact the outer wall of the turbine rotating shaft.

6. A water ingress prevention device for a steam turbine as claimed in claim 2, characterised in that: The through hole (21) is provided with two groups of symmetrically distributed through holes (23), and the baffle movable partitions (4) are used for the sliding opening and closing of the through holes (23).

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