Turbine partition plate sealing structure

Abstract

The utility model relates to the technical field of sealing structures, and discloses a steam turbine partition plate sealing structure which comprises a sealing partition plate and a blade arranged on the sealing partition plate, a channel is formed in the sealing partition plate, and the air inlet end of the channel is located at the position, close to the blade, of the sealing partition plate. The exhaust end of the channel is located on the periphery of the sealing partition plate and fixedly communicates with a communicating pipe. And an indicating piece which moves along with the change of air pressure is arranged in the communicating pipe. According to the steam turbine partition plate sealing structure, due to the fact that the indicating piece is arranged, when the sealing performance of the sealing partition plate is reduced, the extending length of the movable rod is driven under the elastic force effect of the spring, the prompting effect is achieved, and it can be known that the sealing performance of the sealing partition plate becomes poor.

Description

Technical Field

[0001] The utility model relates to the field of sealing structures, in particular to a steam turbine diaphragm sealing structure. Background Art

[0002] When the steam turbine is working, the rotor rotates at high speed while the stationary part does not move. A certain gap must be left between the moving and stationary parts to avoid collision or friction. There is usually a pressure difference on both sides of the gap, so some steam will leak through the gap, causing energy loss and reducing the efficiency of the steam turbine. In order to reduce the steam leakage loss, steam seals are set at the corresponding parts of the steam turbine.

[0003] When the sealing partition is in operation, the pressure difference between the front and rear of the partition makes the sealing surfaces of the inner and outer rings of the partition close to the inner wall of the cylinder to prevent steam leakage. In the actual processing and installation process, it cannot be guaranteed that the inner and outer rings of the partition can be close to the inner wall of the cylinder at the same time. At the same time, after the unit has been running for a period of time, the sealing surface is prone to deformation and scaling, resulting in poor sealing effect on the steam outlet side, affecting the efficiency of the unit.

[0004] In order to solve the above problems, a steam turbine diaphragm sealing structure is proposed in the present application. Utility Model Content

[0005] (I) Purpose of the utility model

[0006] In order to solve the technical problems existing in the background technology, the utility model proposes a turbine partition sealing structure. The utility model is provided with an indicator so that when the sealing performance of the sealing partition is reduced, the elastic force of the spring drives the moving rod to extend to a certain length, thereby playing a prompting role, so that it can be known that the sealing performance has deteriorated.

[0007] (II) Technical solution

[0008] In order to solve the above problems, the utility model provides a steam turbine diaphragm sealing structure, comprising a sealing diaphragm and blades arranged on the sealing diaphragm, wherein a channel is opened on the sealing diaphragm, and the air inlet end of the channel is located at the sealing diaphragm close to the blades;

[0009] The exhaust end of the channel is located at the outer periphery of the sealing partition and is fixedly connected with a connecting pipe;

[0010] An indicator which moves due to changes in air pressure is arranged inside the communicating tube.

[0011] Preferably, the indicator includes a piston, a spring, a stopper and a moving rod, the piston is slidably sleeved inside the connecting pipe, the stopper is fixedly mounted on the connecting pipe and slidably sleeved with the moving rod, one end of the moving rod is fixedly connected to the piston, the spring is movably sleeved on the outer periphery of the moving rod, one end of the spring is fixedly connected to the stopper, and the other end of the spring is fixedly connected to the piston.

[0012] Preferably, the moving rod is provided with scales.

[0013] Preferably, a right-angle rod is fixedly connected to the movable rod, a button is provided at one end of the right-angle rod, and the button is electrically connected to an alarm.

[0014] Preferably, the button is connected to an elastic member.

[0015] The above technical solution of the utility model has the following beneficial technical effects:

[0016] When the sealing baffle is connected to the outer shell, the connecting pipe extends out of the outer shell, and the elastic member is connected to the outer shell. When the sealing effect of the sealing baffle deteriorates, the air pressure acting on the piston becomes lower, and under the action of the spring restoring force, the moving rod is driven to increase the length entering the inner part of the connecting pipe, thereby playing the effect of reminding the sealing baffle that the sealing performance is reduced; under the movement of the moving rod, the right-angle rod is driven to move downward to squeeze the button, thereby triggering the alarm. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The utility model is a structural schematic diagram of a steam turbine diaphragm sealing structure.

[0018] Figure 2 The utility model provides a schematic diagram of the internal structure of a connecting pipe in a steam turbine diaphragm sealing structure.

[0019] Figure 3 The utility model is a schematic diagram of a partial side structure of a steam turbine diaphragm sealing structure.

[0020] Figure numerals: 1. Sealing baffle; 2. Blade; 3. Connecting pipe; 4. Indicator; 41. Piston; 42. Spring; 43. Stopper; 44. Moving rod; 45. Right-angle rod; 46. Button; 47. Elastic member. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0022] like Figure 1-3 As shown, a steam turbine diaphragm sealing structure proposed by the utility model comprises a sealing diaphragm 1 and a blade 2 arranged on the sealing diaphragm 1. A channel is opened on the sealing diaphragm 1, and the air inlet end of the channel is located at the sealing diaphragm 1 close to the blade 2;

[0023] The exhaust end of the channel is located at the outer periphery of the sealing partition 1 and is fixedly connected with a connecting pipe 3;

[0024] An indicator 4 that moves in response to changes in air pressure is provided inside the connecting pipe 3 .

[0025] In an optional embodiment, the indicator 4 includes a piston 41, a spring 42, a stopper 43 and a moving rod 44, the piston 41 is slidably sleeved inside the connecting pipe 3, the stopper 43 is fixedly mounted on the connecting pipe 3 and is slidably sleeved with the moving rod 44, one end of the moving rod 44 is fixedly connected to the piston 41, the spring 42 is movably sleeved on the outer periphery of the moving rod 44, one end of the spring 42 is fixedly connected to the stopper 43, and the other end of the spring 42 is fixedly connected to the piston 41.

[0026] Furthermore, the moving rod 44 is provided with scales.

[0027] It should be noted that, under the action of the scale, the length of the moving rod 44 entering the connecting pipe 3 can be observed.

[0028] In an optional embodiment, a right-angle rod 45 is fixedly connected to the moving rod 44 , a button 46 is provided at one end of the right-angle rod 45 , and the button 46 is electrically connected to an alarm.

[0029] Furthermore, the button 46 is connected to an elastic member 47 .

[0030] It should be noted that the elastic member 47 is a spring or a spring sheet to prevent the button 46 from being unable to move after being pressed and thus being damaged.

[0031] In the utility model, when the sealing partition 1 is connected to the outer shell, the connecting pipe 3 extends out of the outer shell, and the elastic member 47 is connected to the outer shell. When the sealing effect of the sealing partition 1 deteriorates, the air pressure acting on the piston 41 becomes lower, and under the action of the restoring force of the spring 42, the moving rod 44 is driven to increase the length entering the inner part of the connecting pipe 3, thereby playing the effect of reminding the sealing partition 1 that the sealing performance is reduced; under the movement of the moving rod 44, the right-angle rod 45 is driven to move downward to squeeze the button 46, thereby triggering the alarm.

[0032] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation on the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the claims attached to the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the attached claims, or the equivalent forms of such scope and boundaries.

Claims

1. A steam turbine diaphragm sealing structure, comprising a sealing diaphragm (1) and blades (2) arranged on the sealing diaphragm (1), characterized in that: The sealing baffle (1) is provided with a channel, and the air inlet end of the channel is located at the sealing baffle (1) close to the blade (2); The exhaust end of the channel is located at the outer periphery of the sealing partition (1) and is fixedly connected to a connecting pipe (3); An indicator (4) which moves in response to changes in air pressure is provided inside the connecting pipe (3).

2. A steam turbine diaphragm sealing structure according to claim 1, characterized in that: The indicating member (4) comprises a piston (41), a spring (42), a stopper (43) and a moving rod (44); the piston (41) is slidably sleeved inside the connecting pipe (3); the stopper (43) is fixedly mounted on the connecting pipe (3) and slidably sleeved with the moving rod (44); one end of the moving rod (44) is fixedly connected to the piston (41); the spring (42) is movably sleeved on the outer periphery of the moving rod (44); one end of the spring (42) is fixedly connected to the stopper (43); and the other end of the spring (42) is fixedly connected to the piston (41).

3. A steam turbine diaphragm sealing structure according to claim 2, characterized in that: The moving rod (44) is provided with scales.

4. A steam turbine diaphragm sealing structure according to claim 3, characterized in that: A right-angle rod (45) is fixedly connected to the moving rod (44), a button (46) is provided at one end of the right-angle rod (45), and the button (46) is electrically connected to an alarm.

5. A steam turbine diaphragm sealing structure according to claim 4, characterized in that: The button (46) is connected to an elastic member (47).

Images