A steam turbine bearing lubricating oil splash prevention device

Abstract

The utility model discloses a steam turbine bearing oil splash-proof blocking device, comprising a plurality of oil baffle teeth installed on the inner side of the shaft hole of the bearing box and two semi-synthetic oil baffle rings installed on one side of the bearing shell, the bearing shell is installed around the turbine rotor and fixed in the bearing box, and the end of the turbine rotor passes through the shaft hole of the bearing box to the outside of the bearing box, and also comprises an oil baffle plate installed on one side of the two semi-synthetic oil baffle rings, and a fixing structure and a disassembly and assembly positioning structure are provided between the oil baffle plate and the bearing shell; the utility model installs a novel oil baffle plate, so that the lubricating oil sprayed from the two semi-synthetic oil baffle rings will be blocked for the second time by the oil baffle plate, and the efficiency of blocking the lubricating oil from splashing to the oil baffle teeth of the bearing box is higher, and the oil baffle plate is an integral design, which can block the lubricating oil sprayed from the split surface gap in the two semi-synthetic oil baffle rings from splashing to the oil baffle teeth, and the utility model also has the characteristic of easy disassembly and assembly, which is convenient for subsequent inspection and maintenance.

Description

Technical Field

[0001] The utility model belongs to the technical field of steam turbine bearing bushes, and in particular relates to a steam turbine bearing bush lubricating oil splash-proof blocking device. Background Art

[0002] A steam turbine is a rotary steam-powered device, commonly used in power plants, and also widely used in chemical, petroleum, metallurgy, natural gas and other industrial fields. The turbine bearing is mainly responsible for bearing the weight of the rotor and other additional forces caused by partial steam inlet, vibration and other reasons; at the same time, the center of rotation of the rotor is kept consistent with the center of the cylinder, thereby ensuring that the radial clearance between the rotor and the stationary parts such as the cylinder, steam seal and partition is correct. When the turbine bearing is working at a high speed, it is necessary to continuously supply lubricating oil to lubricate the bearing, form an oil film between the journal and the bearing, avoid direct metal friction and cool the bearing and the rotor journal, and take away the heat generated by the bearing when it is working.

[0003] The lubricating oil seal of the part where the turbine rotor passes through the end of the bearing box is blocked by the oil retaining teeth installed on the bearing box. When the turbine is running, the lubricating oil of a certain pressure value is sent into the bearing shell through the pipeline and sprayed out from both sides of the bearing shell. A large amount of sprayed lubricating oil splashes to the oil retaining teeth. At present, some turbine bearing shell oil spraying and splashing prevention devices are two-half synthetic oil retaining rings, which are embedded and installed on the side of the bearing shell by screws and are in the same plane as the side of the bearing shell. Such two-half synthetic oil retaining rings have the following problems: first, there is a gap in the dividing surface of the two-half synthetic oil retaining rings, and the bearing shell lubricating oil is easy to spray out from this gap to the bearing shell oil retaining teeth to cause oil leakage; second, the two-half synthetic oil retaining rings are only provided with one, and the bearing shell lubricating oil is no longer blocked after being sprayed out from the gap between the two-half synthetic oil retaining rings and the rotor, and the lubricating oil is easy to splash to the bearing shell oil retaining teeth to cause oil leakage. The position of the bearing shell where the turbine cylinder and the steam pipeline are arranged belongs to the high temperature area. Oil leakage is easy to cause fire and cause safety hazards to the operation of the turbine. For this reason, the utility model proposes a turbine bearing shell lubricating oil splashing prevention and blocking device. Utility Model Content

[0004] The utility model aims to provide a steam turbine bearing lubricating oil splash prevention device to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a steam turbine bearing oil splash prevention device, comprising a plurality of oil baffle teeth installed on the inner side of the shaft hole of the bearing box and two half synthetic oil baffle rings installed on one side of the bearing, the bearing is installed around the turbine rotor and fixed in the bearing box, and the end of the turbine rotor passes through the shaft hole of the bearing box to the outside of the bearing box, and also includes an oil baffle plate installed on one side of the two half synthetic oil baffle rings, and a fixing structure and a disassembly and assembly positioning structure are provided between the oil baffle plate and the bearing;

[0006] The fixing structure includes screws and circular through holes, and the oil blocking baffle is fixed to the bearing bush through a plurality of screws;

[0007] The disassembly and assembly positioning structure includes a cylindrical plug-in block and a cylindrical slot. Two cylindrical plug-ins are symmetrically fixed to the bottom end of the oil-blocking baffle, and two cylindrical slots for the cylindrical plug-ins to be inserted are provided on the surface of the bearing shell. A movable groove is provided inside the cylindrical plug-in block, and a spring and a telescopic bead are provided in the movable groove. The telescopic bead is movably installed in the movable groove through the spring, and an annular groove corresponding to the telescopic bead is provided on the inner wall of the cylindrical slot. The end of the telescopic bead pops out into the annular groove, one end of the spring is fixed on the inner wall of the movable groove, and the other end of the spring is fixed to the telescopic bead.

[0008] Preferably, a plurality of bolt grooves are formed on the surfaces of the two halves of the synthetic oil deflector ring, and a fixing bolt is embedded and installed in each bolt groove, and the two halves of the synthetic oil deflector ring are fixed together with the bearing shell by the fixing bolts.

[0009] Preferably, the oil-blocking baffle is a U-shaped circular plate, and the opening of the U-shaped circular plate is directly below the bearing shell.

[0010] Preferably, a plurality of circular through holes corresponding to the screws are formed on the surface of the oil-blocking baffle, and threaded holes corresponding to the circular through holes are formed on the surface of the bearing shell.

[0011] Preferably, there is a gap between the oil baffle and the turbine rotor.

[0012] Preferably, the outer diameter of the oil-blocking baffle is smaller than the outer diameter of the bearing bushing.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model installs a new type of oil baffle plate, so that the lubricating oil sprayed from the two halves of the synthetic oil baffle ring will be blocked for a second time by the oil baffle plate, and the efficiency of blocking the lubricating oil from splashing to the oil baffle teeth of the bearing box is higher. The oil baffle plate is an integral design, which can block the lubricating oil sprayed from the split surface gap between the two halves of the synthetic oil baffle ring from splashing to the oil baffle teeth. At the same time, the utility model is also easy to disassemble and assemble, which is convenient for subsequent inspection and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a top view of the utility model;

[0015] Figure 2 It is a front view of the utility model;

[0016] Figure 3 It is a side view of the oil blocking baffle of the utility model;

[0017] Figure 4 This is a three-dimensional diagram of the oil-blocking baffle of the utility model;

[0018] Figure 5 For this utility model Figure 2 A partial enlarged cross-sectional view of the middle A area;

[0019] In the figure: 1. turbine rotor; 2. bearing shell; 3. oil baffle plate; 31. screw; 32. circular through hole; 4. bearing box; 5. oil baffle tooth; 6. two-half synthetic oil baffle ring; 61. bolt groove; 62. fixing bolt; 7. disassembly and assembly positioning structure; 71. cylindrical plug-in block; 72. telescopic clamping bead; 73. movable groove; 74. spring; 75. cylindrical slot; 76. annular clamping groove. DETAILED DESCRIPTION

[0020] 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.

[0021] Example

[0022] See also Figures 1 to 5 , is an embodiment of the utility model, which provides a technical solution: a steam turbine bearing oil splash-proof blocking device, comprising a plurality of oil baffle teeth 5 installed on the inner side of the shaft hole of the bearing box 4 and two semi-synthetic oil baffle rings 6 installed on one side of the bearing 2, the bearing 2 is installed around the turbine rotor 1 and fixed in the bearing box 4, and the end of the turbine rotor 1 passes through the shaft hole of the bearing box 4 to the outside of the bearing box 4, the bearing box 4 contains lubricating oil required for lubrication and cooling of the bearing 2, the oil baffle teeth 5 can prevent the lubricating oil from leaking from the shaft hole of the turbine rotor 1 of the bearing box 4, and also includes an oil baffle plate 3 installed on one side of the two semi-synthetic oil baffle rings 6, the oil baffle plate 3 can perform secondary blocking on the lubricating oil sprayed from the gap between the two semi-synthetic oil baffle rings 6, and the efficiency of blocking the lubricating oil from splashing to the oil baffle teeth 5 is higher, and a fixing structure and a disassembly and assembly positioning structure 7 are provided between the oil baffle plate 3 and the bearing 2;

[0023] The fixing structure includes screws 31 and circular through holes 32, and the oil blocking baffle 3 is fixed to the bearing bush 2 by a plurality of screws 31;

[0024] The disassembly and assembly positioning structure 7 includes a cylindrical plug-in block 71 and a cylindrical slot 75. Two cylindrical plug-in blocks 71 are symmetrically welded and fixed to the bottom end of the oil baffle 3, and the surface of the bearing shell 2 is provided with two cylindrical slots 75 for the cylindrical plug-in blocks 71 to be inserted, which can play an auxiliary positioning role when the oil baffle 3 is installed. A movable groove 73 is provided inside the cylindrical plug-in block 71, and a spring 74 and a telescopic card bead 72 are provided in the movable groove 73. The telescopic card bead 72 is movably installed in the movable groove 73 through the spring 74, and the inner wall of the cylindrical slot 75 is provided with a spring 74 and a telescopic card bead 72. 2, the end of the telescopic bead 72 pops out into the annular groove 76, so that when the cylindrical plug 71 is inserted into the cylindrical slot 75, the end of the telescopic bead 72 is pushed by the spring 74 to be stuck in the annular groove 76, thereby playing a role of locking and limiting, so that the oil baffle 3 can be effectively positioned before being fixed by the screw 31, and the oil baffle 3 can be bolted without holding it by hand. At the same time, the circular through hole 32 will be aligned with the threaded hole on the surface of the bearing shell 2, which also plays a role of auxiliary positioning and improves the installation efficiency.

[0025] One end of the spring 74 is fixed to the inner wall of the movable groove 73 , and the other end of the spring 74 is fixed to the telescopic bead 72 to ensure the installation stability of the spring 74 .

[0026] The surfaces of the two halves of the synthetic oil deflector ring 6 are provided with a plurality of bolt grooves 61 , and a fixing bolt 62 is embedded and installed in each bolt groove 61 . The two halves of the synthetic oil deflector ring 6 are fixed together with the bearing shell 2 via the fixing bolts 62 .

[0027] The oil blocking baffle 3 is a U-shaped circular plate, the opening of which is directly below the bearing bush 2 , and can block the lubricating oil sprayed out from the gap between the two halves of the synthetic oil blocking ring 6 .

[0028] Among them, the surface of the oil baffle plate 3 is provided with multiple circular through holes 32 corresponding to the screws 31, and the surface of the bearing shell 2 is provided with threaded holes corresponding to the circular through holes 32, so that the oil baffle plate 3 can be smoothly fixed to the bearing shell 2 through the screws 31.

[0029] There is a gap between the oil baffle plate 3 and the steam turbine rotor 1 , which can prevent the oil baffle plate 3 from rubbing against the rotating steam turbine rotor 1 .

[0030] The outer diameter of the oil-blocking baffle 3 is smaller than the outer diameter of the bearing shell 2 , so as to prevent the upper bearing pillow of the bearing shell 2 from failing to fix the bearing shell 2 .

[0031] In summary, the working principle is: when the steam turbine is running, lubricating oil of a certain pressure value is sent into the bearing 2 through the pipeline and sprayed out from both sides of the bearing 2. A large amount of sprayed lubricating oil splashes to the oil baffle teeth 5, which will cause the lubricating oil to leak from the bearing box 4. The oil baffle plate 3 installed on the utility model can prevent the lubricating oil sprayed from the bearing 2 from splashing to the oil baffle teeth 5, avoid the fire hazard caused by oil leakage in the bearing box 4, and ensure the safe and stable operation of the steam turbine.

[0032] Although the embodiments of the present invention have been shown and described (see the above detailed description for details), it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A steam turbine bearing oil splash prevention device, comprising a plurality of oil retaining teeth (5) mounted on the inner side of the shaft hole of a bearing box (4) and two half synthetic oil retaining rings (6) mounted on one side of a bearing (2), wherein the bearing (2) is mounted around a steam turbine rotor (1) and fixed in the bearing box (4), and the end of the steam turbine rotor (1) passes through the shaft hole of the bearing box (4) to the outer side of the bearing box (4), characterized in that: It also includes an oil baffle plate (3) installed on one side of the two semi-synthetic oil baffle rings (6), and a fixing structure and a disassembly and assembly positioning structure (7) are provided between the oil baffle plate (3) and the bearing bush (2); The fixing structure comprises screws (31) and circular through holes (32), and the oil blocking plate (3) is fixed to the bearing bush (2) via a plurality of screws (31); The disassembly and assembly positioning structure (7) comprises a cylindrical plug-in block (71) and a cylindrical slot (75); two cylindrical plug-in blocks (71) are symmetrically fixed to the bottom end of the oil-blocking baffle (3); and two cylindrical slots (75) for inserting the cylindrical plug-in blocks (71) are provided on the surface of the bearing bush (2).

2. The steam turbine bearing lubricating oil splash prevention device according to claim 1, characterized in that: The cylindrical plug block (71) is provided with a movable groove (73) inside, and a spring (74) and a telescopic bead (72) are arranged inside the movable groove (73). The telescopic bead (72) is movably installed in the movable groove (73) through the spring (74). The inner wall of the cylindrical slot (75) is provided with an annular groove (76) corresponding to the telescopic bead (72), and the end of the telescopic bead (72) pops out into the annular groove (76).

3. The anti-splash blocking device for lubricating oil of a steam turbine bearing according to claim 2 is characterized in that: One end of the spring (74) is fixed on the inner wall of the movable groove (73), and the other end of the spring (74) is fixed to the telescopic card bead (72).

4. The anti-splash blocking device for lubricating oil of a steam turbine bearing according to claim 1, characterized in that: The surfaces of the two-half synthetic oil deflector ring (6) are provided with a plurality of bolt grooves (61), and a fixing bolt (62) is embedded and installed in each bolt groove (61). The two-half synthetic oil deflector ring (6) is fixed to the bearing bush (2) via the fixing bolts (62).

5. The anti-splash blocking device for lubricating oil of steam turbine bearing according to claim 1, characterized in that: The oil-blocking baffle (3) is a U-shaped circular plate, and the opening of the U-shaped circular plate is directly below the bearing bush (2).

6. The anti-splash blocking device for lubricating oil of steam turbine bearing according to claim 1, characterized in that: The surface of the oil-blocking baffle (3) is provided with a plurality of circular through holes (32) corresponding to the screws (31), and the surface of the bearing bush (2) is provided with threaded holes corresponding to the circular through holes (32).

7. The anti-splash blocking device for lubricating oil of a steam turbine bearing according to claim 1, characterized in that: There is a gap between the oil blocking baffle (3) and the turbine rotor (1).

8. The steam turbine bearing lubricating oil splash prevention device according to claim 1, characterized in that: The outer diameter of the oil blocking baffle (3) is smaller than the outer diameter of the bearing bush (2).

Images