High-temperature-resistant dustproof steam seal

Abstract

The utility model discloses a high-temperature-resistant dustproof steam seal, which belongs to the field of steam seals and comprises an upper steam seal ring and a lower steam seal ring, steam seal teeth are arranged on inner rings of the upper steam seal ring and the lower steam seal ring, the upper steam seal ring is positioned above the lower steam seal ring, and mounting grooves are arranged at the front ends and the rear ends of the inner rings of the upper steam seal ring and the lower steam seal ring. Positioning insertion blocks are arranged at the two ends of the bottom of the upper dustproof gasket, positioning insertion grooves are formed in the positions, corresponding to the positioning insertion blocks, of the two ends of the top of the lower dustproof gasket, and threaded grooves are formed in the positions, corresponding to the positioning insertion grooves, of the outer side end face of the lower steam sealing ring; the upper dustproof gasket and the lower dustproof gasket are arranged on the inner ring of the upper steam sealing ring and the inner ring of the lower steam sealing ring correspondingly, meanwhile, the positioning insertion blocks are arranged at the two ends of the upper dustproof gasket, the positioning insertion blocks are matched with the positioning insertion grooves for installation, locking is conducted through the pressing screw rods, and the good dustproof effect is guaranteed; the high-temperature resistance is enhanced, and deformation is prevented.

Description

Technical Field

[0001] The utility model relates to the field of steam seals, in particular to a high-temperature resistant and dustproof steam seal. Background Art

[0002] The steam seal is a device installed between the moving and static parts of the steam turbine to reduce or prevent steam leakage and air leakage into the vacuum side. The performance of the steam seal has an important impact on the economy and reliability of the unit. In order to reduce steam leakage losses and improve the safety and economy of the unit, it is very necessary to use advanced steam seal technology to transform the original traditional steam seal. Since there is a certain radial gap between the steam seal device and the rotor, after working for a long time, dust and other impurities may be mixed into the steam seal due to the existence of gaps, thereby increasing friction with the rotor, affecting the service life and causing inconvenience. Utility Model Content

[0003] The main purpose of the utility model is to provide a high temperature resistant and dustproof steam seal, which can effectively solve the problems in the background technology.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A high-temperature resistant dustproof steam seal comprises an upper steam seal ring and a lower steam seal ring, wherein the inner rings of the upper steam seal ring and the lower steam seal ring are both provided with steam seal teeth, the upper steam seal ring is located above the lower steam seal ring, and the front and rear end positions of the upper steam seal ring and the inner rings of the lower steam seal ring are both provided with mounting grooves, an upper dustproof gasket and a lower dustproof gasket are respectively provided in the mounting grooves, positioning blocks are provided at both ends of the bottom of the upper dustproof gasket, positioning slots are provided at both ends of the top of the lower dustproof gasket corresponding to the positioning blocks, a threaded groove is provided at the outer end surface of the lower steam seal ring corresponding to the positioning slot, and a clamping screw is provided in the threaded groove.

[0006] Preferably, the thickness of the upper dustproof gasket is equal to that of the lower dustproof gasket, high temperature resistant gaskets are arranged on the inner sides of the lower dustproof gasket and the upper dustproof gasket, and an inner groove is arranged on the inner wall of one side of the installation groove corresponding to the high temperature resistant gasket.

[0007] Preferably, a limiting strip is provided on one side of the upper dustproof gasket and the lower dustproof gasket, and a limiting groove is provided on the inner wall of one side of the installation groove corresponding to the limiting strip.

[0008] Preferably, the positioning plug and the upper dustproof gasket are an integral component, and the depth of the positioning slot is slightly greater than the length of the positioning plug.

[0009] Preferably, circular holes are provided at both ends of the outer end surface of the lower dustproof gasket, the tail of the circular hole is connected to the positioning slot, and the middle of the clamping screw is located in the circular hole.

[0010] Preferably, a slot is provided in the middle of the positioning block, the width of the slot is equal to the diameter of the clamping screw, the head of the clamping screw extends into the slot, and a sloped pad is provided at the bottom of the slot, the lower end of the sloped pad faces the direction of the thread groove, and the sloped pad and the positioning block are an integral component.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] In the utility model, an upper dustproof gasket and a lower dustproof gasket are respectively arranged on the inner rings of the upper steam sealing ring and the lower steam sealing ring, and positioning blocks are arranged at both ends of the upper dustproof gasket. The positioning blocks are used to cooperate with the positioning slots for installation, and are locked by tightening screws to ensure a good dustproof effect. At the same time, a high-temperature resistant gasket is arranged on one side of the dustproof gasket to enhance the high-temperature resistance and prevent deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the lower dustproof gasket of the utility model;

[0015] Figure 3 It is a schematic diagram of the compression screw of the utility model;

[0016] Figure 4 It is a schematic diagram of the positioning plug block of the utility model.

[0017] In the figure: 1. Upper steam seal ring; 2. Lower steam seal ring; 3. Steam seal teeth; 4. Inclined pad; 5. Mounting groove; 6. Lower dustproof gasket; 7. Upper dustproof gasket; 8. High temperature resistant gasket; 9. Inner groove; 10. Limiting strip; 11. Limiting groove; 12. Positioning plug; 13. Positioning slot; 14. Round hole; 15. Pressing screw; 16. Threaded groove; 17. Card slot. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0019] like Figure 1-4As shown, a high-temperature resistant dustproof steam seal comprises an upper steam seal ring 1 and a lower steam seal ring 2. The inner rings of the upper steam seal ring 1 and the lower steam seal ring 2 are both provided with steam seal teeth 3. The upper steam seal ring 1 is located above the lower steam seal ring 2. The front and rear end positions of the inner rings of the upper steam seal ring 1 and the lower steam seal ring 2 are both provided with mounting grooves 5. An upper dustproof gasket 7 and a lower dustproof gasket 6 are respectively arranged in the mounting grooves 5. Positioning blocks 12 are arranged at both ends of the bottom of the upper dustproof gasket 7. Positioning slots 13 are arranged at both ends of the top of the lower dustproof gasket 6 corresponding to the positioning blocks 12. A threaded groove 16 is arranged at the outer end surface of the lower steam seal ring 2 corresponding to the positioning slot 13. A tightening screw 15 is arranged in the threaded groove 16.

[0020] In this embodiment, in order to enhance the high temperature resistance of the upper dustproof gasket 7 and the lower dustproof gasket 6 and avoid deformation due to high temperature, the thickness of the upper dustproof gasket 7 and the lower dustproof gasket 6 are equal, and a high temperature resistant gasket 8 is provided on the inner side of the lower dustproof gasket 6 and the upper dustproof gasket 7, and an inner groove 9 is provided on the inner wall of one side of the installation groove 5 corresponding to the high temperature resistant gasket 8;

[0021] In this embodiment, in order to enhance the stability of the upper dustproof gasket 7 and the lower dustproof gasket 6 after installation and keep them fixed inside the upper steam seal ring 1 and the lower steam seal ring 2, a limiting strip 10 is provided on one side of the upper dustproof gasket 7 and the lower dustproof gasket 6, and a limiting groove 11 is provided on the inner wall of one side of the installation groove 5 corresponding to the limiting strip 10;

[0022] In this embodiment, in order to enable the positioning plug 12 to be pressed and continue to move to a certain extent, thereby driving the upper dustproof gasket 7 to continue to press downward, so that the upper dustproof gasket 7 and the lower dustproof gasket 6 are completely close to each other to improve the sealing and dustproof effect, the positioning plug 12 and the upper dustproof gasket 7 are integrally formed, and the depth of the positioning slot 13 is slightly greater than the length of the positioning plug 12;

[0023] In this embodiment, in order to effectively enhance the tightness of the connection between the upper dustproof gasket 7 and the lower dustproof gasket 6 and prevent dust and impurities from being mixed in from the connection between the upper dustproof gasket 7 and the lower dustproof gasket 6, circular holes 14 are provided at both ends of the outer end surface of the lower dustproof gasket 6, the tail of the circular hole 14 is connected to the positioning slot 13, the middle of the clamping screw 15 is located in the circular hole 14, and a card slot 17 is provided in the middle of the positioning plug 12. The width of the card slot 17 is equal to the diameter of the clamping screw 15, and the head of the clamping screw 15 extends into the card slot 17. A sloped pad 4 is provided at the bottom of the card slot 17, and the lower end of the sloped pad 4 faces the direction of the threaded groove 16, and the sloped pad 4 and the positioning plug 12 are an integral component.

[0024] It should be noted that the utility model is a high temperature resistant dustproof steam seal. In actual use, the upper steam seal ring 1 and the lower steam seal ring 2 are both made of high temperature resistant materials. The upper dustproof gasket 7 is first installed in the installation groove 5 inside the upper steam seal ring 1, and the lower dustproof gasket 6 is also installed in the installation groove 5 inside the lower steam seal ring 2. When installing and splicing the upper steam seal ring 1 and the lower steam seal ring 2, align the upper dustproof gasket 7 with the lower dustproof gasket 6, and align the positioning plug 12 with the positioning slot 13. The positioning block 12 is placed in the positioning slot 13, and the positioning block 12 moves downward along the positioning slot 13. When the upper dustproof gasket 7 is aligned with the lower dustproof gasket 6, the positioning block 12 is located in the positioning slot 13, and the front end of the inclined pad 4 is at the same height as the bottom of the round hole 14. Then the installation between the upper steam seal ring 1 and the lower steam seal ring 2 is completed, and then the thread groove 16 on the outer side of the lower steam seal ring 2 is found, and the clamping screw 15 is installed along the thread groove 16, so that the head of the clamping screw 15 passes through the thread groove 16 and gradually rotates inward. The pressing screw 15 then passes through the circular hole 14 and then continues to move into the slot 17. Since the head of the inclined plate 4 is located at the bottom of the slot 17, the pressing screw 15 will squeeze the inclined plate 4 after entering, causing it to gradually move downward, causing the positioning plug 12 made of elastic material to deform to a certain extent, and also driving the upper dustproof gasket 7 connected above to move, so that the upper dustproof gasket 7 and the lower dustproof gasket 6 are completely close to each other, reducing the upper dustproof gasket 7 and the lower dustproof gasket 6. The gap at the connection is to prevent dust from entering through the gap. An upper dustproof gasket 7 and a lower dustproof gasket 6 are respectively arranged on the inner rings of the upper steam sealing ring 1 and the lower steam sealing ring 2. At the same time, positioning blocks 12 are arranged at both ends of the upper dustproof gasket 7. The positioning blocks 12 are used to cooperate with the positioning slots 13 for installation, and are locked by the tightening screws 15 to ensure a good dustproof effect. At the same time, a high-temperature resistant gasket 8 is arranged on one side of the upper dustproof gasket 7 and the lower dustproof gasket 6 to enhance the high-temperature resistance and prevent deformation.

[0025] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A high temperature resistant dustproof steam seal, comprising an upper steam seal ring (1) and a lower steam seal ring (2), wherein the inner rings of the upper steam seal ring (1) and the lower steam seal ring (2) are both provided with steam seal teeth (3), and the upper steam seal ring (1) is located above the lower steam seal ring (2), characterized in that: The upper steam seal ring (1) and the lower steam seal ring (2) are both provided with mounting grooves (5) at the front and rear ends of the inner rings, and an upper dustproof gasket (7) and a lower dustproof gasket (6) are respectively provided in the mounting grooves (5). Positioning plugs (12) are provided at both ends of the bottom of the upper dustproof gasket (7), and positioning slots (13) are provided at both ends of the top of the lower dustproof gasket (6) corresponding to the positioning plugs (12). A threaded groove (16) is provided at the outer end surface of the lower steam seal ring (2) corresponding to the positioning slot (13), and a clamping screw (15) is provided in the threaded groove (16).

2. A high temperature resistant dustproof steam seal according to claim 1, characterized in that: The thickness of the upper dustproof gasket (7) and the lower dustproof gasket (6) are equal, and high-temperature resistant gaskets (8) are arranged inside the lower dustproof gasket (6) and the upper dustproof gasket (7), and an inner groove (9) is arranged on the inner wall of one side of the installation groove (5) corresponding to the high-temperature resistant gasket (8).

3. A high temperature resistant dustproof steam seal according to claim 1, characterized in that: A limiting strip (10) is provided on one side of the upper dustproof gasket (7) and the lower dustproof gasket (6), and a limiting groove (11) is provided on the inner wall of one side of the installation groove (5) corresponding to the limiting strip (10).

4. A high temperature resistant dustproof steam seal according to claim 1, characterized in that: The positioning plug (12) and the upper dustproof gasket (7) are integrally formed components, and the depth of the positioning slot (13) is slightly greater than the length of the positioning plug (12).

5. A high temperature resistant dustproof steam seal according to claim 1, characterized in that: Circular holes (14) are provided at both ends of the outer end surface of the lower dustproof gasket (6), the tail of the circular hole (14) is connected to the positioning slot (13), and the middle of the clamping screw (15) is located in the circular hole (14).

6. A high temperature resistant dustproof steam seal according to claim 5, characterized in that: A slot (17) is provided in the middle of the positioning plug (12), the width of the slot (17) is equal to the diameter of the clamping screw (15), the head of the clamping screw (15) extends into the slot (17), and a sloped pad (4) is provided at the bottom of the slot (17), the lower end of the sloped pad (4) faces the direction of the thread groove (16), and the sloped pad (4) and the positioning plug (12) are an integral component.

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