Tilting pad sliding bearing with adjustable positioning for steam turbine

Abstract

The utility model relates to a turbine tilting pad sliding bearing with adjustable positioning, which comprises a pad body, a pad block and an oil retainer, the pad block is arranged on the inner ring of the pad body, and the oil retainer is arranged on the axial side wall of the pad body; the tile body comprises an upper tile body and a lower tile body, and the upper tile body is connected with the lower tile body; the outer side wall of the top of the upper bush body is provided with a top positioning adjusting assembly capable of adjusting the height of the top positioning adjusting assembly so as to adjust the pressing force of the bearing box on the top of the bearing after the bearing is installed. The two ends of the upper bush body are provided with end adjusting assemblies which are adjustable in height and can be compressed when being stressed so as to adjust the horizontal installation position of the bearing and the pressing force of the bearing box on the two ends of the bearing. According to the tilting-pad sliding bearing of the steam turbine, the pressing force of the bearing installed in the bearing box can be adjusted, so that the pressing force of the bearing is appropriate, and the use supporting strength and the service life of the bearing can be guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to steam turbine technical field especially is a kind of steam turbine tilting-pad sliding bearing of adjustable positioning. BACKGROUND

[0002] The tilting-pad sliding bearing used by existing steam turbine is generally adapted to be installed in bearing box, provides an installation environment for bearing, so that bearing can work stably, but in prior art, bearing is directly installed in bearing box, and bearing is limited by the side wall of bearing box, and does not have adjusting structure to adjust the pressing force between bearing and bearing box, so that the pressing force of bearing is appropriate, if the pressing force is too large, it can cause bearing to bear too large force, and bearing is in the environment of relatively large pressing force for a long time, which can reduce the service life of bearing to some extent, and too small pressing force, and bearing stability is poor, which can also relatively affect the supporting effect of bearing on rotor. SUMMARY

[0003] The steam turbine tilting-pad sliding bearing of adjustable positioning can adjust the pressing force of bearing installed in bearing box, so that the pressing force of bearing is appropriate, and can guarantee the use supporting strength and service life of bearing.

[0004] To achieve the above object, the utility model adopts the following technical scheme:

[0005] A steam turbine tilting-pad sliding bearing of adjustable positioning, comprising pad body, pad block and oil retaining ring, the pad block is arranged in the inner ring of the pad body, and the oil retaining ring is arranged on the axial side wall of the pad body.

[0006] The pad body comprises upper pad body and lower pad body, and the upper pad body is connected with the lower pad body.

[0007] The upper pad body is provided with top positioning adjusting assembly which can adjust its height and be compressed under stress on the outer side wall of the top of the upper pad body, so as to adjust the pressing force of bearing box on the top of bearing after installation of bearing.

[0008] The upper pad body is provided with end adjusting assembly which can adjust its height and be compressed under stress on both ends of the upper pad body, so as to adjust the horizontal installation position of bearing and the pressing force of bearing box on both ends of bearing.

[0009] Preferably, the top positioning adjusting assembly comprises top adjusting block and first elastic gasket.

[0010] The top adjusting block is detachably installed on the top outer side wall of the upper pad body, and the end of the top adjusting block away from the upper pad body is provided with arc surface.

[0011] The first elastic gasket is installed between the top adjusting block and the outer side wall of the upper pad body.

[0012] Preferably, the arc of the arc-shaped surface of the top adjusting block is the same as the arc of the inner side wall of the top of the bearing housing.

[0013] Preferably, the end adjusting assembly comprises a second elastic gasket, the upper tile body is provided with a mounting block at the lower end of each of the two ends, the mounting block is provided with an adjusting groove on the upper end surface, and the second elastic gasket is arranged in the adjusting groove to adjust the horizontal position of the bearing and the pressing force between the bearing and the bearing housing.

[0014] Preferably, the lower tile body is provided with a bottom adjusting assembly to adjust the concentricity of the bearing and the bottom bearing support.

[0015] Preferably, the bottom adjusting assembly comprises a bottom adjusting block, a horizontal adjusting bolt and a vertical adjusting bolt.

[0016] The lower side wall of the lower tile body is provided with a positioning protrusion, and the bottom adjusting block is provided with a positioning groove matched with the positioning protrusion on the side wall close to the lower tile body.

[0017] The vertical side wall and the horizontal side wall of the positioning protrusion are respectively provided with a horizontal threaded hole and a vertical threaded hole, and the bottom adjusting block is provided with a horizontal mounting hole and a vertical mounting hole.

[0018] The third elastic gasket and the fourth elastic gasket are located between the bottom adjusting block and the lower side wall of the lower tile body.

[0019] The horizontal adjusting bolt passes through the horizontal mounting hole and the third elastic gasket and is connected to the horizontal threaded hole, and the vertical adjusting bolt passes through the vertical mounting hole and the fourth elastic gasket and is connected to the vertical threaded hole, so that the bottom adjusting block is located in the positioning groove, and the bottom adjusting block is connected to the lower tile body.

[0020] Preferably, the lower side wall of the bottom adjusting block is provided as an arc-shaped surface, the arc of the arc-shaped surface is the same as the arc of the inner side wall of the bearing mounting seat, and the arc of the outer lower side wall of the bottom adjusting block is greater than 90 degrees.

[0021] Compared with the prior art, the utility model has the beneficial effects that:

[0022] By setting the top adjusting assembly and the end adjusting assembly, the height of each can be adjusted before installation, so that the pressing force of the bearing installed in the bearing housing can be adjusted after the bearing is installed, the working environment is ensured to be suitable, and the service life and working stability of the bearing are ensured. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the description of the specific embodiments or the prior art. Obviously, the drawings described below are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0024] Fig. 1 It is a whole schematic view of the device of the embodiment in the present application.

[0025] Fig. 2 It is a whole schematic view of the device of the embodiment in the present application.

[0026] Fig. 3 It is a whole schematic view of the device of the embodiment in the present application.

[0027] Explanation of reference signs:

[0028] 1, tile body; 11, upper tile body; 12, lower tile body; 13, mounting block; 131, adjusting groove; 2, tile block; 3, oil baffle; 4, top positioning and adjusting assembly; 41, top adjusting block; 42, first elastic gasket; 5, end adjusting assembly; 51, second elastic gasket; 6, bottom adjusting assembly; 61, bottom adjusting block; 62, horizontal adjusting bolt; 63, vertical adjusting bolt; 7, bearing mounting seat. DETAILED DESCRIPTION

[0029] The technical solutions of the present application will be described clearly and completely below in combination with the drawings. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0030] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0031] In the description of the utility model, it is necessary to explain that, unless there is definite stipulation and limitation, the term "mounting", "connection" should be broad sense understanding, for example, it can be fixed connection, also can be detachable connection, or integrally connected, it can be mechanical connection, also can be electrical connection, it can be direct connection, also can be indirectly connected through intermediate medium, it can be two element internal communication, for ordinary skilled in the art, the specific meaning of the above-mentioned term in the utility model can be understood according to specific circumstances.

[0032] As Figs. 1-3 The utility model discloses a positioning adjustable steam turbine tilting pad sliding bearing, including pad 1, pad 2 and oil baffle 3, wherein pad 2 is provided with multiple, multiple pad 2 is installed in the ring of pad 1, and oil baffle 3 is provided with two, and is installed in the axial two sides wall of pad 1 through bolt respectively, specifically, pad 1 includes upper pad 11 and lower pad 12, and upper pad 11 and lower pad 12 are connected through bolt, specifically, top positioning adjusting assembly 4 is equipped on the top outside wall of upper pad 11, before bearing installation, the height of top positioning adjusting assembly 4 can be adjusted, after bearing is installed in bearing box, top positioning adjusting assembly 4 will be abutted with the inner side wall of bearing box, and the inner side wall of bearing box is relatively extruded top positioning adjusting assembly 4, i.e. relatively extruded bearing, thereby the compression force is applied to bearing, before installation, the height of top positioning adjusting assembly 4 is different, then after bearing is installed in bearing box, the compression force of bearing top of bearing box is different, specifically, end adjusting assembly 5 is equipped on the both ends of upper pad 11, and end positioning adjusting assembly can adjust the height of itself and be compressed when stressed, before bearing installation, the height of end adjusting assembly 5 can be adjusted, after bearing is installed in bearing box, end adjusting assembly 5 will be abutted with the inner side wall of bearing box, and end adjusting assembly 5 will be extruded, so that the inner side wall of bearing box will apply compression force to the end of bearing, so before installation, the height of top positioning adjusting assembly 4 is different, after bearing is installed in the inner side wall of bearing box, the compression force of bearing end will be different, and end adjusting assembly 5 will be compressed, and the side wall of bearing box and end adjusting assembly 5 will be in full contact, so the horizontal installation position of bearing will also be adjusted. By setting top adjusting assembly and end adjusting assembly 5, before installation, the height of each is adjusted, so that after bearing installation, the compression force of bearing installed in bearing box can be adjusted, to ensure that it is suitable for working environment, to ensure the service life stability of bearing work.

[0033] Specifically, the top positioning adjusting assembly 4 comprises a top adjusting block 41 and a first elastic gasket 42, wherein the first elastic gasket 42 is installed between the top adjusting block 41 and the top outer side wall of the upper tile body 11, and the top adjusting block 41 is bolted to the top outer side wall of the upper tile body 11, wherein a through hole is formed in the top adjusting block 41, and a threaded hole is formed in the top outer side wall of the upper tile body 11, the lower end of the bolt passes through the through hole in the top adjusting block 41, passes through the first elastic gasket 42 and is screwed into the threaded hole, the top adjusting block 41 is fixed to the top of the upper tile body 11 by the bolt, the height of the top adjusting block 41 can be increased by increasing the number of first elastic gaskets 42 or changing the thickness of the first elastic gasket 42, and due to the different heights of the top adjusting block 41, the first elastic gasket 42 will be compressed to different degrees (the top adjusting block 41 is compressed once by the bolt), so that the pressing force of the bearing housing on the top adjusting block 41 will be different, the pressing force on the top of the bearing will be different, the adjustment of the pressing force of the bearing housing on the top of the bearing is realized, and the thickness of the first elastic gasket 42 or the number of first elastic gaskets 42 can be determined by preliminary tests so that the top of the bearing is subjected to appropriate pressing force. Specifically, the first elastic gasket 42 can be a rubber gasket. Correspondingly, in order to make the top adjusting block 41 fully contact with the top inner side wall of the bearing housing, the upper side wall of the top adjusting block 41 is provided as an arc surface with the same curvature as the top inner side wall of the bearing housing, and after the bearing is installed in the bearing housing, the top adjusting block 41 fully contacts with the top inner side wall of the bearing housing, so that the installation position of the bearing can be appropriately adjusted.

[0034] Specifically, the end adjusting assembly 5 comprises a second elastic gasket 51, and the lower ends of the upper tile body 11 are provided with mounting blocks 13, and the upper end surfaces of the mounting blocks 13 are provided with adjusting grooves 131, the second elastic gasket 51 is placed in the adjusting groove 131, the second elastic gasket 51 protrudes from the adjusting groove 131, and by placing second elastic gaskets 51 with different thicknesses, when the bearing is installed in the bearing housing, the second elastic gasket 51 fully contacts with the inner side wall of the bearing housing, thereby pressing the end of the bearing, and along with the different heights of the second elastic gasket 51 protruding from the adjusting groove 131, the pressing force of the second elastic gasket 51 on the bearing housing will be different, so the pressing force of the bearing housing on the end of the bearing will be different; of course, the second elastic gasket 51 fully contacts with the inner side wall of the bearing housing, and the horizontal installation position of the bearing can be appropriately adjusted to ensure that the installation position is appropriate. Specifically, the second elastic gasket 51 is a rubber gasket, and a T-shaped through hole is formed in the upper end surface of the second elastic gasket 51, and a threaded hole is formed in the adjusting groove 131, and the second elastic gasket 51 is locked in the adjusting groove 131 by a bolt passing through the T-shaped through hole.

[0035] Further, the lower part of the lower tile body 12 is provided with a bottom adjusting assembly 6 to adjust the concentricity of the bearing and the bottom bearing support, so as to ensure the accurate installation position of the bearing, the accurate center shaft after installation and the stable support of the rotor. Specifically, the bottom adjusting assembly 6 comprises a bottom adjusting block 61, a horizontal adjusting bolt 62 and a vertical adjusting bolt 63, wherein the lower side wall of the lower tile body 12 is provided with a positioning protrusion, the bottom adjusting block 61 is provided with a positioning groove matched with the positioning protrusion on the side wall of the lower tile body 12, and horizontal screw holes and vertical screw holes are respectively arranged on the vertical side wall and the horizontal side wall of the positioning protrusion, the bottom adjusting block 61 is provided with horizontal mounting holes and vertical mounting holes, and the bottom adjusting block 61 can be installed on the side wall of the lower tile body 12 through the horizontal adjusting bolt 62 and the vertical adjusting bolt 63, specifically, the horizontal adjusting bolt 62 passes through the horizontal mounting hole and the third elastic washer and is connected to the horizontal screw hole, and the vertical adjusting bolt 63 passes through the vertical mounting hole and the fourth elastic washer and is connected to the vertical screw hole, so that the bottom adjusting block 61 is located in the positioning groove, so that the installation direction of the entire bearing can be adjusted by adjusting the tightness of the horizontal adjusting bolt 62 and the vertical adjusting bolt 63 and cooperating with the first elastic washer 42 and the fourth elastic washer, and when the bearing is installed on the bearing mounting seat 7, the bottom adjusting block 61 is placed on the bearing seat, the bearing can be consistent with the concentricity of the bearing mounting seat 7, so as to ensure the support strength and installation position of the bearing. Specifically, the third elastic washer and the fourth elastic washer are rubber washers.

[0036] Of course, the lower side wall of the bottom adjusting block 61 is provided as an arc surface, and the curvature of the arc surface is the same as the curvature of the inner side wall of the bearing mounting seat 7, so that after the bottom adjusting block 61 is placed on the bearing mounting seat 7, the outer side wall of the bottom adjusting block 61 can be fitted with the inner side wall of the bearing mounting seat 7, so that the support of the bottom adjusting block 61 and the entire bearing is better.

[0037] Specifically, the curvature of the lower outer side wall of the bottom adjusting block 61 is at least greater than 90 degrees, so as to ensure that there is enough contact surface between the lower outer side wall of the bottom adjusting block 61 and the bearing mounting seat 7, and the support strength of the entire bearing is ensured.

[0038] The above-mentioned embodiments are only preferred embodiments of the present application, and cannot be used to limit the scope of protection of the present application, and any non-essential changes and replacements made by those skilled in the art on the basis of the present application all belong to the scope of protection required by the present application.

Claims

1. A positioning adjustable turbine tilting pad journal bearing, characterized by, The bearing housing comprises a bearing shell, a bearing block and an oil retaining ring, the bearing block is arranged in the bearing shell, and the oil retaining ring is arranged on the axial side wall of the bearing shell; The bearing shell comprises an upper bearing shell and a lower bearing shell, and the upper bearing shell and the lower bearing shell are connected; The outer side wall of the top of the upper bearing shell is provided with a top positioning adjusting assembly which can adjust its height and can be compressed when subjected to force, so as to adjust the pressing force of the bearing housing on the top of the bearing after the bearing is installed; The two end portions of the upper bearing shell are provided with end adjusting assemblies which can adjust their heights and can be compressed when subjected to force, so as to adjust the horizontal installation position of the bearing and the pressing force of the bearing housing on the two end portions of the bearing.

2. The tilting pad journal bearing of claim 1, wherein, The top positioning adjusting assembly comprises a top adjusting block and a first elastic gasket; The top adjusting block is detachably installed on the top outer side wall of the upper bearing shell, and the end portion of the top adjusting block away from the upper bearing shell is provided with an arc surface, and the first elastic gasket is installed between the top adjusting block and the outer side wall of the upper bearing shell.

3. The tilting pad journal bearing of claim 2, wherein, The curvature of the arc surface on the top of the top adjusting block is the same as the curvature of the inner side wall of the top of the bearing housing.

4. The tilting pad journal bearing of claim 1, wherein, The end adjusting assembly comprises a second elastic gasket, the lower two ends of the lower bearing shell are provided with mounting blocks, the upper end surface of the mounting block is provided with an adjusting groove, and the second elastic gasket is arranged in the adjusting groove, so as to adjust the horizontal position of the bearing and the pressing force between the bearing and the bearing housing.

5. The tilting pad journal bearing of claim 1 wherein, The lower portion of the lower bearing shell is provided with a bottom adjusting assembly, so as to adjust the concentricity of the bearing and the bottom bearing support.

6. The tilting pad journal bearing of claim 5, wherein, The bottom adjusting assembly comprises a bottom adjusting block, a horizontal adjusting bolt, a vertical adjusting bolt, a third elastic gasket and a fourth elastic gasket, the lower side wall of the lower bearing shell is provided with a positioning protrusion, and the bottom adjusting block is provided with a positioning groove matched with the positioning protrusion on the side wall close to the lower bearing shell; The vertical side wall and the horizontal side wall of the positioning protrusion are respectively provided with a horizontal threaded hole and a vertical threaded hole, and the bottom adjusting block is provided with a horizontal mounting hole and a vertical mounting hole; The third elastic gasket and the fourth elastic gasket are located between the bottom adjusting block and the lower side wall of the lower bearing shell; The horizontal adjusting bolt passes through the horizontal mounting hole and the third elastic gasket and is connected to the horizontal threaded hole, and the vertical adjusting bolt passes through the vertical mounting hole and the fourth elastic gasket and is connected to the vertical threaded hole, so that the bottom adjusting block is located in the positioning groove, and the bottom adjusting block is connected to the lower bearing shell.

7. The tilting pad journal bearing of claim 6, wherein, The lower side wall of the bottom adjusting block is provided with an arc surface, and the curvature of the arc surface is the same as the curvature of the inner side wall of the bearing mounting seat, and the curvature of the outer side wall of the lower portion of the bottom adjusting block is at least greater than 90 degrees.

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