Lubricating oil sealing mechanism for bearing box of steam turbine

Abstract

The utility model relates to the technical field of bearing box sealing, and discloses a steam turbine bearing box lubricating oil sealing mechanism which comprises a box body, a sealing mechanism body is arranged outside the box body, a cleaning mechanism is arranged outside the sealing mechanism body, the sealing mechanism body comprises a static ring and a movable ring, a water retaining assembly is arranged outside the movable ring, and the cleaning mechanism is arranged outside the static ring. One end of the movable ring is fixedly connected with a first friction ring, one end of the first friction ring is attached to a second friction ring, heat conduction pieces are arranged outside the first friction ring and the second friction ring, an oil collecting groove is formed in the inner wall of the static ring, and one end of the oil collecting groove fixedly communicates with an oil discharging hole. According to the lubricating oil sealing mechanism of the steam turbine bearing box, friction is carried out through the first friction ring and the second friction ring, so that heat is generated, the heat generated by friction is guided out to the periphery through the arranged heat conduction pieces, and water vapor is prevented from entering the box body.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing box sealing, in particular to a lubricating oil sealing mechanism for a steam turbine bearing box. Background Art

[0002] Steam turbines use steam as a power source, and convert steam energy into rotational motion of the shaft through blades. The shaft is usually supported by a bearing box for rotation. Therefore, the outside of the bearing box facing the blades is in an environment of water vapor and impurities. The bearing box is filled with lubricating oil for bearing lubrication. During operation, oil seal leakage, external water vapor and impurities entering the bearing box and contaminating the internal lubricating oil often occur.

[0003] According to the Chinese patent publication number CN 220395772 U, a lubricating oil sealing mechanism for a bearing box of a steam turbine includes a box body, a stationary ring mounting hole is arranged on the box body, three sealing grooves are evenly distributed on the stationary ring mounting hole, the sealing groove is fixedly connected to the stationary ring through a sealing ring arranged therein, the stationary ring is arranged in a cylindrical shape, the middle part is arranged as a second rotating shaft mounting hole, the left end face is arranged as an annular contact flange, the second rotating shaft mounting hole is inserted with a rotating shaft, the contact flange is overlapped on the boss of the moving ring, the moving ring is arranged in a disc shape, the middle part is arranged as a first rotating shaft mounting hole, the first rotating shaft mounting hole is fixedly connected to the rotating shaft, two sets of water retaining rings are arranged to effectively block the water vapor generated by the steam turbine to prevent the water vapor from directly entering the bearing box, if part of the water vapor passes through the water retaining ring, hot air is blown into the first air guide groove, the second air guide groove and the third air guide groove by using a blast pipe, and a small amount of water vapor infiltrated into the two sets of water retaining rings is discharged by using the flowing hot air.

[0004] However, when the device is in use, a blower is used to introduce hot air to discharge a small amount of water vapor, which requires the use of more mechanical equipment, increases the cost of the equipment, and makes the device have certain limitations. Utility Model Content

[0005] The purpose of the utility model is to provide a lubricating oil sealing mechanism for a turbine bearing box, so as to solve the problem proposed in the above-mentioned background technology that when the device is in use, a blower is used to introduce hot air to discharge a small amount of water vapor, which requires the use of more mechanical equipment, increases the cost of the equipment, and makes the device have certain limitations.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions: a lubricating oil sealing mechanism for a steam turbine bearing box comprises a box body, a sealing mechanism is arranged outside the box body, and a cleaning mechanism is arranged outside the sealing mechanism;

[0007] The sealing mechanism includes a static ring and a dynamic ring, a water retaining assembly is arranged on the outside of the dynamic ring, a first friction ring is fixedly connected to one end of the dynamic ring, a second friction ring is attached to one end of the first friction ring, heat conducting plates are arranged on the outside of the first friction ring and the second friction ring, an oil collecting groove is opened on the inner wall of the static ring, and an oil drain hole is fixedly connected to one end of the oil collecting groove.

[0008] Preferably, the water retaining assembly comprises a rotating groove, and a water retaining ring is clamped on the inner side of the rotating groove.

[0009] Preferably, there are two rotating grooves, both of which are arranged outside the moving ring, and there are two water retaining rings, which are respectively installed on the inner side of the rotating groove and the outside of the box body.

[0010] Preferably, the stationary ring is installed at one end of the box body, a rotating shaft is installed in the middle of the stationary ring, the dynamic ring is installed outside the rotating shaft, and a connecting flange is provided at one end of the stationary ring.

[0011] Preferably, two of each of the first friction ring and the second friction ring are provided, and one end of the second friction ring is fixedly connected to one end of the box body.

[0012] Preferably, the cleaning mechanism comprises a connecting rod, one end of which is fixedly connected to a rotating plate, and one end of which is mounted with a cleaning brush.

[0013] Preferably, the connecting rod is fixedly connected to the outside of the first friction ring, the rotating plate is arranged in an L shape, and one end of the cleaning brush is in contact with the surface of the moving ring.

[0014] Compared with the prior art, the beneficial effects achieved by the utility model are:

[0015] First, the utility model drives the moving ring to rotate through the rotating shaft, so that the water retaining ring clamped at the moving ring also rotates, and then cooperates with the water retaining ring on the casing, and the water vapor generated by the steam turbine is effectively blocked by the two water retaining rings. Then, the moving ring is a disc structure that can directly isolate most of the water vapor or other external impurities near the rotating shaft installed near the casing, preventing water vapor from directly entering the casing. Then, when the moving ring rotates, it drives the first friction ring to rotate, so that the first friction ring and the second friction ring rub against each other, thereby generating heat. The heat generated by the friction is discharged to the surroundings through the arranged heat conducting plate, so that the surrounding air is heated, and then the water vapor at the moving ring and the water retaining ring is dried, further preventing water vapor from entering the casing, and then the lubricating oil on the rotating shaft is blocked through the oil collecting groove opened on the inner side of the static ring and guided back into the casing through the oil drain hole, thereby completing the operation of preventing the lubricating oil from leaking out, achieving the effect of reducing the cost of equipment use.

[0016] Second, the utility model drives the moving ring to rotate through the rotating shaft, thereby causing the first friction ring to rotate. The rotation of the first friction ring can drive the connecting rod to rotate, thereby driving the rotating plate to rotate, and then causing the cleaning brush in contact with the surface of the moving ring to rotate, thereby cleaning impurities on the surface of the moving ring, increasing the service life of the moving ring, and completing the cleaning operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the dynamic ring of the utility model;

[0018] Figure 2 It is a three-dimensional diagram of the cleaning mechanism of the utility model;

[0019] Figure 3 This is a cross-sectional view of the utility model;

[0020] Figure 4 It is an enlarged view of point A of the present utility model.

[0021] Among them: 1. Box body; 2. Sealing mechanism; 3. Cleaning mechanism; 21. Stationary ring; 22. Moving ring; 23. Water retaining assembly; 24. First friction ring; 25. Second friction ring; 26. Heat conducting plate; 27. Oil collecting trough; 28. Oil drain hole; 29. ​​Water retaining ring; 31. Connecting rod; 32. Rotating plate; 33. Cleaning brush. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] The utility model provides the following technical solutions:

[0024] Embodiment 1

[0025] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 The lubricating oil sealing mechanism of the bearing box of the steam turbine comprises a box body 1, a sealing mechanism 2 is arranged outside the box body 1, and a cleaning mechanism 3 is arranged outside the sealing mechanism 2;

[0026] The sealing mechanism 2 includes a stationary ring 21 and a dynamic ring 22. A water retaining assembly 23 is arranged on the outside of the dynamic ring 22. A first friction ring 24 is fixedly connected to one end of the dynamic ring 22. A second friction ring 25 is attached to one end of the first friction ring 24. Heat conducting plates 26 are arranged on the outside of the first friction ring 24 and the second friction ring 25. An oil collecting groove 27 is opened on the inner wall of the stationary ring 21. An oil drain hole 28 is fixedly connected to one end of the oil collecting groove 27.

[0027] The water retaining assembly 23 comprises a rotation groove, and a water retaining ring 29 is clamped on the inner side of the rotation groove.

[0028] There are two rotating grooves, both of which are arranged outside the moving ring 22 . There are two water retaining rings 29 , which are respectively installed on the inner side of the rotating groove and the outside of the box body 1 .

[0029] The stationary ring 21 is installed at one end of the housing 1 , a rotating shaft is installed in the middle of the stationary ring 21 , the dynamic ring 22 is installed outside the rotating shaft, and a connecting flange is provided at one end of the stationary ring 21 .

[0030] Two first friction rings 24 and two second friction rings 25 are provided, and one end of the second friction ring 25 is fixedly connected to one end of the box body 1 .

[0031] Through the above technical scheme, the rotating shaft drives the moving ring 22 to rotate, so that the water retaining ring 29 clamped at the moving ring 22 also rotates, and then cooperates with the water retaining ring 29 on the casing 1, and the water vapor generated by the steam turbine is effectively blocked by the two water retaining rings 29, and then the moving ring 22 is a disc structure that can directly isolate most of the water vapor or other external impurities near the casing 1 where the rotating shaft is installed, to prevent water vapor from directly entering the casing 1, and then when the moving ring 22 rotates, it drives the first friction ring 24 to rotate, so that the first friction ring 24 and the second friction ring 25 rub against each other, thereby generating heat, and the heat generated by the friction is discharged to the surroundings through the provided heat conducting plate 26, so that the surrounding air is heated, and then the water vapor at the moving ring 22 and the water retaining ring 29 is dried, and the water vapor is further prevented from entering the casing 1, and then the oil collecting groove 27 opened on the inner side of the static ring 21 is used to block the lubricating oil on the rotating shaft and guide it back to the casing 1 through the oil drain hole 28, thereby completing the operation of preventing the lubricating oil from leaking out, and achieving the effect of reducing the cost of equipment use.

[0032] Embodiment 2

[0033] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 On the basis of the first embodiment, it is further obtained that the cleaning mechanism 3 includes a connecting rod 31, one end of the connecting rod 31 is fixedly connected to a rotating plate 32, and one end of the rotating plate 32 is installed with a cleaning brush 33.

[0034] The connecting rod 31 is fixedly connected to the outside of the first friction ring 24 , the rotating plate 32 is configured to be L-shaped, and one end of the cleaning brush 33 is in contact with the surface of the dynamic ring 22 .

[0035] Through the above technical solution, the rotating ring 22 is driven to rotate by the rotating shaft, thereby causing the first friction ring 24 to rotate. The rotation of the first friction ring 24 can drive the connecting rod 31 to rotate, thereby driving the rotating plate 32 to rotate, and then the cleaning brush 33 in contact with the surface of the rotating ring 22 is also rotated, thereby cleaning the impurities on the surface of the rotating ring 22, thereby increasing the service life of the rotating ring 22, and completing the cleaning operation.

[0036] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit thereof, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A steam turbine bearing box lubricating oil sealing mechanism, comprising a box body (1), Features: A sealing mechanism (2) is disposed outside the box (1), and a cleaning mechanism (3) is disposed outside the sealing mechanism (2); The sealing mechanism (2) comprises a stationary ring (21) and a dynamic ring (22); a water retaining assembly (23) is arranged outside the dynamic ring (22); one end of the dynamic ring (22) is fixedly connected to a first friction ring (24); one end of the first friction ring (24) is fitted with a second friction ring (25); heat conducting plates (26) are arranged outside the first friction ring (24) and the second friction ring (25); an oil collecting groove (27) is provided on the inner wall of the stationary ring (21); one end of the oil collecting groove (27) is fixedly connected to an oil drain hole (28).

2. The lubricating oil sealing mechanism for a steam turbine bearing box according to claim 1, Features: The water retaining assembly (23) comprises a rotation groove, and a water retaining ring (29) is clamped on the inner side of the rotation groove.

3. The lubricating oil sealing mechanism for a steam turbine bearing box according to claim 2, Features: There are two rotating grooves, both of which are located outside the moving ring (22); there are two water retaining rings (29), which are respectively installed on the inner side of the rotating groove and the outside of the box body (1).

4. The lubricating oil sealing mechanism for a steam turbine bearing box according to claim 1, Features: The stationary ring (21) is mounted on one end of the housing (1), a rotating shaft is mounted in the middle of the stationary ring (21), the dynamic ring (22) is mounted outside the rotating shaft, and a connecting flange is provided at one end of the stationary ring (21).

5. The lubricating oil sealing mechanism for a steam turbine bearing box according to claim 1, Features: Two of each of the first friction ring (24) and the second friction ring (25) are provided, and one end of the second friction ring (25) is fixedly connected to one end of the box body (1).

6. The lubricating oil sealing mechanism for a steam turbine bearing box according to claim 1, Features: The cleaning mechanism (3) comprises a connecting rod (31), one end of which is fixedly connected to a rotating plate (32), and one end of which is mounted a cleaning brush (33).

7. The lubricating oil sealing mechanism for a steam turbine bearing box according to claim 6, Features: The connecting rod (31) is fixedly connected to the outside of the first friction ring (24), the rotating plate (32) is arranged in an L shape, and one end of the cleaning brush (33) is in contact with the surface of the moving ring (22).

Images