Steam reheating device for increasing temperature of shaft seal gas of steam turbine

Abstract

The utility model relates to the technical field of steam reheating, and discloses a steam reheating device for improving steam turbine shaft seal gas temperature, which comprises a high-pressure cylinder, sliding rails are in threaded connection with the bottoms of the front and rear ends of the right side of the outer wall of the high-pressure cylinder, and pulleys are in sliding connection with the front and rear sides in the sliding rails. An arc-shaped rail is rotationally connected to the outer wall of the pulley, a second sliding groove is formed in the bottom wall of the arc-shaped rail, a connecting rod is arranged in the second sliding groove in a penetrating mode, an infrared heater is installed at the other end of the connecting rod, a low-pressure air cylinder is in threaded connection with the right end of the sliding rail, and a lubricating mechanism is installed at the bottom of the left side of the outer wall of the low-pressure air cylinder. The lubricating mechanism is used for lubricating the steam turbine shaft seal. According to the shaft seal heating device, the infrared heater can heat the shaft seal, the infrared heater can slide left and right and up and down, gas in the shaft seal can be heated in a multi-angle mode, and the situation that external gas enters the shaft seal is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of steam reheating, in particular to a steam reheating device for increasing the temperature of the steam seal gas of a steam turbine. Background Technique

[0002] The steam seal of a steam turbine is a device used to prevent steam from leaking along the shaft end. The steam seal is installed at the shaft end of the steam turbine and includes a high-pressure end and a low-pressure end. The main function of the steam seal is to form a seal between the shaft and the cylinder, reduce the leakage loss of steam, and improve the efficiency of the steam turbine.

[0003] During the use of the steam seal of a steam turbine, a device is needed to reheate the steam in the steam seal. This uses a steam reheating device for increasing the temperature of the steam seal gas of a steam turbine. The steam reheating device can reheat the gas in the steam seal twice to prevent external gas from entering the steam seal and hindering the operation of the steam turbine.

[0004] In the prior art, the steam seal of a steam turbine uses a comb-tooth type for sealing, and multiple layers of comb teeth are used to reduce the entry of external gas. However, due to the reduction of the steam temperature and pressure inside the steam seal and the lack of secondary heating, external gas will enter the steam seal, affecting the stability of the operation of the steam seal and having certain potential safety hazards. Content of the Utility Model

[0005] In order to make up for the above deficiencies, the utility model provides a steam reheating device for increasing the temperature of the steam seal gas of a steam turbine, aiming to improve the problem that the gas inside the steam seal cannot be reheated again in the prior art.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme: A steam reheating device for increasing the temperature of the steam seal gas of a steam turbine, including a high-pressure cylinder. The front and rear ends of the bottom on the right side of the outer wall of the high-pressure cylinder are both threadedly connected with slide rails. The front and rear sides inside the slide rails are both slidably connected with pulleys. The outer walls of the pulleys are rotatably connected with arc-shaped rails. The arc-shaped rails are slidably connected to the front and rear sides inside the slide rails. The front and rear sides of the outer walls of the arc-shaped rails are provided with chute 1. The inside of chute 1 is slidably connected with rollers. A bolt assembly is penetrated through the inside of the rollers. The bottom wall of the arc-shaped rail is provided with chute 2. A connecting rod is penetrated through the inside of chute 2. The top end of the connecting rod is fixedly connected to the bottom wall of the roller. The other end of the connecting rod is provided with an infrared heater. The right end of the slide rail is threadedly connected with a low-pressure cylinder. A lubrication mechanism is installed at the bottom on the left side of the outer wall of the low-pressure cylinder. The lubrication mechanism is used to lubricate the steam seal of the steam turbine.

[0007] As a further description of the above technical solution:

[0008] The lubrication mechanism includes a fixing plate which is threadedly connected to the bottom left side of the outer wall of the low-pressure cylinder. A motor is fixedly connected to the bottom left side of the outer wall of the fixing plate. The output end of the motor is fixedly connected to a worm. Both the front and rear sides of the outer wall of the worm are meshed with a worm gear. The right end of the worm gear is rotatably connected to the middle left side of the outer wall of the fixing plate. The other end of the worm gear is fixedly connected to a round brush head. A fuel storage pot is installed in the middle of the rear side of the outer wall of the fixing plate. The top of the fuel storage pot is communicated with a spray head pipe.

[0009] As a further description of the above technical solution:

[0010] Both the left and right sides of the slide rail are fixedly connected with baffle plates. Bolts I are threadedly connected to both the front and rear sides of the outer walls of the baffle plates.

[0011] As a further description of the above technical solution:

[0012] The bottom of the connecting rod is fixedly connected with a rotating shaft. The other end of the rotating shaft is rotatably connected with an infrared heater.

[0013] As a further description of the above technical solution:

[0014] The bottom of the arc-shaped rail is rotatably connected with a pulley. Anti-slip textures are equidistantly arranged on the outer wall of the arc-shaped rail.

[0015] As a further description of the above technical solution:

[0016] Sound insulation boards I are installed on both the front and rear sides of the outer wall of the high-pressure cylinder. Sound insulation boards II are installed on both the front and rear sides of the outer wall of the low-pressure cylinder.

[0017] As a further description of the above technical solution:

[0018] Heat insulation cotton I is installed on the left side of the outer wall of the high-pressure cylinder. Heat insulation cotton II is installed on the right side of the outer wall of the low-pressure cylinder.

[0019] As a further description of the above technical solution:

[0020] A dust-proof cover is installed at the bottom of the infrared heater. The dust-proof cover is threadedly connected to the bottom of the infrared heater.

[0021] The utility model has the following beneficial effects:

[0022] 1. In the utility model, the infrared heater can provide the function of secondary heating for the shaft seal. The slide rail and the arc-shaped rail limit the infrared heater. The infrared heater can slide left and right and up and down, heating the gas inside the shaft seal at multiple angles, avoiding the situation that the pressure decreases due to the decrease of the gas temperature inside the shaft seal, and further preventing the outside gas from entering the inside of the shaft seal.

[0023] 2. In the present utility model, the lubrication mechanism can effectively provide lubrication for the shaft seal. The motor drives the worm gear to drive the worm to rotate, and the round brush head applies lubricating oil at the bottom of the shaft seal, solving the problem that workers need to add lubricating oil at the bottom of the shaft seal, which saves more manpower. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A perspective view of a steam reheating device for improving the gas temperature of a steam turbine shaft seal proposed by the present utility model;

[0025] Figure 2 An exploded view of the slide rail structure of a steam reheating device for improving the gas temperature of a steam turbine shaft seal proposed by the present utility model;

[0026] Figure 3 An exploded view of the lubrication mechanism structure of a steam reheating device for improving the gas temperature of a steam turbine shaft seal proposed by the present utility model;

[0027] Figure 4 A top view of a steam reheating device for improving the gas temperature of a steam turbine shaft seal proposed by the present utility model.

[0028] Legend Explanation:

[0029] 1. High-pressure cylinder; 2. Lubrication mechanism; 201. Fixed plate; 202. Electric motor; 203. Worm; 204. Worm gear; 205. Round brush head; 206. Oil storage pot; 207. Sprinkler pipe; 3. Slide rail; 4. Pulley; 5. Arc rail; 6. First chute; 7. Roller; 8. Bolt assembly; 9. Second chute; 10. Connecting rod; 11. Infrared heater; 12. Low-pressure cylinder; 13. Baffle; 14. First bolt; 15. Rotating shaft; 16. Anti-slip texture; 17. First sound insulation board; 18. Second sound insulation board; 19. First heat insulation cotton; 20. Second heat insulation cotton; 21. Dust-proof cover. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0031] Refer to Figure 1 and Figure 2, an embodiment provided by the present utility model: a steam reheating device for increasing the temperature of the steam in the steam turbine shaft seal, including a high-pressure cylinder 1. At the bottom of the front and rear ends on the right side of the outer wall of the high-pressure cylinder 1, slide rails 3 are threadedly connected. On the front and rear sides inside the slide rails 3, pulleys 4 are slidably connected. On the outer wall of the pulley 4, an arc-shaped rail 5 is rotatably connected. The arc-shaped rail 5 is slidably connected to the front and rear sides inside the slide rail 3. On the front and rear sides of the outer wall of the arc-shaped rail 5, a first chute 6 is provided. Inside the first chute 6, a roller 7 is slidably connected. Inside the roller 7, a bolt assembly 8 is inserted. On the bottom wall of the arc-shaped rail 5, a second chute 9 is provided. Inside the second chute 9, a connecting rod 10 is inserted. The top end of the connecting rod 10 is fixedly connected to the bottom wall of the roller 7. At the other end of the connecting rod 10, an infrared heater 11 is installed. On the right end of the slide rail 3, a low-pressure cylinder 12 is threadedly connected. At the bottom on the left side of the outer wall of the low-pressure cylinder 12, a lubricating mechanism 2 is installed. The lubricating mechanism 2 is used to lubricate the steam turbine shaft seal; the bottom of the connecting rod 10 is fixedly connected to a rotating shaft 15. At the other end of the rotating shaft 15, the infrared heater 11 is rotatably connected;

[0032] Specifically, when it is necessary to reheat the steam inside the steam turbine shaft seal, first, one end of the slide rail 3 is threadedly connected to the bottom on the right side of the high-pressure cylinder 1, and the other end is fixed to the bottom on the left side of the low-pressure cylinder 12 by the same threaded connection method. Then, the infrared heater 11 is turned on. The infrared heater 11 can quickly increase the local temperature and effectively heat the steam inside the shaft seal. By moving the arc-shaped rail 5 to slide left and right inside the slide rail 3, the left and right movement of the infrared heater 11 can be realized, ensuring that the heating range can cover the entire shaft seal area. When it is necessary to move the infrared heater 11 up and down and flip it, by sliding the roller 7 up and down inside the two chutes, the infrared heater 11 can be easily moved to the position where heating is required. When the roller 7 slides to the ideal position, the bolt assembly 8 is used for fixation to ensure that the heater does not move during the heating process. By rotating the rotating shaft 15, the left and right angles of the infrared heater can be finely adjusted, so as to precisely control the heating direction of the heater and ensure that the steam inside the shaft seal can be heated evenly and sufficiently.

[0033] Refer to Figure 1 and Figure 3, the lubrication mechanism 2 includes a fixing plate 201, the fixing plate 201 is threadedly connected to the bottom left side of the outer wall of the low-pressure cylinder 12, a motor 202 is fixedly connected to the bottom left side of the outer wall of the fixing plate 201, an output end of the motor 202 is fixedly connected to a worm 203, worm wheels 204 are meshed and connected to both the front and rear sides of the outer wall of the worm 203, the right end of the worm wheel 204 is rotatably connected to the middle of the left side of the outer wall of the fixing plate 201, the other end of the worm wheel 204 is fixedly connected to a round brush head 205, an oil storage pot 206 is installed in the middle of the rear side of the outer wall of the fixing plate 201, and a spray head pipe 207 is communicated with the top of the oil storage pot 206; a heat insulation cotton one 19 is installed on the left side of the outer wall of the high-pressure cylinder 1, and a heat insulation cotton two 20 is installed on the right side of the outer wall of the low-pressure cylinder 12;

[0034] Specifically, the traditional lubrication method for the steam turbine shaft seal is mainly manual lubricating oil addition, which may lead to insufficient or excessive lubricating oil addition, and thus have an adverse effect on the normal operation of the steam turbine. When lubricant needs to be added to the steam turbine shaft seal, the motor 202 starts to operate, driving the rotation of the worm 203. The worm 203 and the worm wheel 204 are connected by meshing to ensure that the worm wheel 204 can rotate stably. As the worm wheel 204 rotates, the round brush head 205 also starts to rotate to ensure uniform application of the lubricating oil. The lubricating oil in the oil storage pot 206 is precisely sprayed onto the bottom of the steam turbine shaft seal through the spray head pipe 207, which can ensure that the spraying range of the lubricating oil covers the entire bottom of the shaft seal to achieve uniform lubrication. The heat insulation cotton 19 installed on the left side of the high-pressure cylinder 1 can reduce the internal heat dissipation of the high-pressure cylinder 1, and the heat insulation cotton two 20 can reduce the internal heat dissipation of the low-pressure cylinder 12. The model of the motor 202 is Y80M1-2, and the model of the infrared heater 11 is KDFD-30.

[0035] Refer to Figure 1 and Figure 2 , baffles 13 are fixedly connected to both the left and right sides of the slide rail 3, and bolts one 14 are threadedly connected to both the front and rear sides of the outer wall of the baffles 13; pulleys 4 are rotatably connected to the bottom of the arc-shaped rail 5, and anti-slip textures 16 are equidistantly arranged on the outer wall of the arc-shaped rail 5;

[0036] Specifically, baffles 13 are fixedly connected to the left and right of the slide rail 3, and the slide rail 3 can be threadedly connected to the bottoms of the high-pressure cylinder 1 and the low-pressure cylinder 12 through the baffles 13. The anti-slip textures 16 help to increase the friction with the hand when the staff slides the arc-shaped rail 5 left and right.

[0037] Refer to Figure 1 and Figure 4 , sound insulation boards one 17 are installed on both the front and rear sides of the outer wall of the high-pressure cylinder 1, and sound insulation boards two 18 are installed on both the front and rear sides of the outer wall of the low-pressure cylinder 12; a dust-proof cover 21 is installed at the bottom of the infrared heater 11, and the dust-proof cover 21 is threadedly connected to the bottom of the infrared heater 11;

[0038] Specifically, the first sound insulation board 17 and the second sound insulation board 18 can effectively reduce the noise generated during the operation of the steam turbine. The dust cover 21 can keep the surface of the infrared heater 11 clean when it is not working, reducing the accumulation of dust.

[0039] Working principle: When it is necessary to reheating the steam inside the steam turbine shaft seal, thread the left end of the slide rail 3 to the right bottom of the high-pressure cylinder 1, and thread the other end of the slide rail to the left bottom of the low-pressure cylinder 12. Turn on the infrared heater 11. By moving the arc-shaped rail 5 to slide left and right inside the slide rail 3, the infrared heater 11 can move left and right. When it is necessary to move the infrared heater 11 up and down and flip it, the roller 7 slides up and down inside the first chute 6 and the second chute 9. When the roller 7 slides to the ideal position, it is fixed by the bolt assembly 8. The left and right angles of the infrared heater 11 can be finely adjusted through the rotating shaft 15;

[0040] When it is necessary to add lubricant to the steam turbine shaft seal, turn on the motor 202. The motor 202 drives the rotation of the worm 203. Since the worm 203 and the worm gear 204 are meshed and connected, the worm gear 204 drives the round brush head 205 to rotate while rotating. The oil storage pot 206 sprays the lubricating oil to the bottom of the steam turbine shaft seal through the nozzle pipe 207, realizing the lubrication of the steam turbine shaft seal and avoiding the disadvantages of manual lubricant addition.

[0041] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A steam reheating device for increasing the temperature of a steam turbine shaft seal gas, comprising a high pressure cylinder (1), characterized in that: The bottom of the front and rear ends of the right side of the outer wall of the high-pressure cylinder (1) are both threadedly connected to a slide rail (3), the front and rear sides of the interior of the slide rail (3) are both slidably connected to a pulley (4), the outer wall of the pulley (4) is rotatably connected to an arc rail (5), the arc rail (5) is slidably connected to the front and rear sides of the interior of the slide rail (3), the front and rear sides of the outer wall of the arc rail (5) are provided with a slide groove (6), the interior of the slide groove (6) is slidably connected to a roller (7), and the interior of the roller (7) is penetrated by a bolt assembly ( 8), a second slide groove (9) is provided on the bottom wall of the arc-shaped rail (5), a connecting rod (10) is passed through the inside of the second slide groove (9), the top end of the connecting rod (10) is fixedly connected to the bottom wall of the roller (7), an infrared heater (11) is installed on the other end of the connecting rod (10), the right end of the slide rail (3) is threadedly connected to a low-pressure cylinder (12), a lubricating mechanism (2) is installed on the bottom left side of the outer wall of the low-pressure cylinder (12), and the lubricating mechanism (2) is used to lubricate the turbine shaft seal.

2. A steam reheating device for increasing the temperature of a steam turbine shaft seal gas according to claim 1, characterized in that: The lubrication mechanism (2) comprises a fixed plate (201), the fixed plate (201) being threadedly connected to the left bottom of the outer wall of the low-pressure cylinder (12), the left bottom of the outer wall of the fixed plate (201) being fixedly connected to an electric motor (202), the output end of the electric motor (202) being fixedly connected to a worm (203), the front and rear sides of the outer wall of the worm (203) being meshingly connected to a worm wheel (204), the right end of the worm wheel (204) being rotatably connected to the middle of the left side of the outer wall of the fixed plate (201), the other end of the worm wheel (204) being fixedly connected to a round brush head (205), an oil storage pot (206) being installed at the middle of the rear end of the left side of the outer wall of the fixed plate (201), the top of the oil storage pot (206) being connected to a nozzle pipe (207).

3. A steam reheating device for increasing the temperature of a steam turbine shaft seal gas according to claim 1, characterized in that: The left and right sides of the slide rail (3) are fixedly connected to baffles (13), and the front and rear sides of the outer walls of the baffles (13) are threadedly connected to bolts 1 (14).

4. A steam reheating device for increasing the temperature of a steam turbine shaft seal gas according to claim 1, characterized in that: The bottom of the connecting rod (10) is fixedly connected to a rotating shaft (15), and the other end of the rotating shaft (15) is rotatably connected to an infrared heater (11).

5. A steam reheating device for increasing the temperature of a steam turbine shaft seal gas according to claim 1, characterized in that: The bottom of the arc-shaped rail (5) is rotatably connected to a pulley (4), and the outer wall of the arc-shaped rail (5) is provided with anti-slip textures (16) at equal intervals.

6. A steam reheating device for increasing the temperature of a steam turbine shaft seal gas according to claim 1, characterized in that: The front and rear sides of the outer wall of the high-pressure cylinder (1) are both installed with a sound insulation board 1 (17), and the front and rear sides of the outer wall of the low-pressure cylinder (12) are both installed with a sound insulation board 2 (18).

7. A steam reheating device for increasing the temperature of a steam turbine shaft seal gas according to claim 1, characterized in that: A first heat-insulating cotton (19) is installed on the left side of the outer wall of the high-pressure cylinder (1), and a second heat-insulating cotton (20) is installed on the right side of the outer wall of the low-pressure cylinder (12).

8. A steam reheating device for increasing the temperature of a steam turbine shaft seal gas according to claim 1, characterized in that: A dust cover (21) is installed at the bottom of the infrared heater (11), and the dust cover (21) is threadedly connected to the bottom of the infrared heater (11).

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