CN213141348U - Steam turbine tile turning device beneficial to reducing abrasion - Google Patents
Steam turbine tile turning device beneficial to reducing abrasion Download PDFInfo
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- CN213141348U CN213141348U CN202022140749.XU CN202022140749U CN213141348U CN 213141348 U CN213141348 U CN 213141348U CN 202022140749 U CN202022140749 U CN 202022140749U CN 213141348 U CN213141348 U CN 213141348U
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Abstract
The utility model belongs to the technical field of the axle bush overhauls, in particular to steam turbine tile turnover device that helps reducing wear. The bearing shell turning device comprises a bearing shell turning support which is composed of an arc-shaped portion and horizontal extension portions fixedly connected to two ends of the length direction of the arc-shaped portion, wherein the arc-shaped portion and a lower half bearing shell form a ring-shaped object in the same plane through the horizontal extension portions, the lower half bearing shell is sleeved on a rotor to which the lower half bearing shell belongs, a supporting pulley extends outwards from a concave surface of the arc-shaped portion, a supporting bolt is arranged on the supporting pulley in a matched mode, the supporting bolt extends into the arc-shaped portion in a spiral matched mode on a convex surface of the arc-shaped portion, and therefore the wheel body is enabled to be.
Description
Technical Field
The utility model belongs to the technical field of the axle bush overhauls, in particular to steam turbine tile turnover device that helps reducing wear.
Background
In the process of turbine maintenance, the bearing bush and the contact part of the bearing bush and the rotor are often required to be checked or repaired, and the bearing bush must be detached from the rotor. When the lower half bearing bush is removed, the lower half bearing bush is just positioned at the bottom of the rotor and can not be directly lifted away by a crane unlike the upper half bearing bush, so that the lower half bearing bush is relatively troublesome to remove.
The existing unit capacity is very large, the bearing bush also becomes large along with the increase of a unit rotor, only the single lower bearing bush usually has the weight of hundreds of jin, the bearing bush cannot be taken out by manpower at all, if the bearing bush is directly pulled out by a hoisting crane or other driving equipment, because the protection measures are lacked between the lower bearing bush and the bearing box mounting groove, the bearing box mounting groove and the lower bearing bush are mutually rubbed, so that the abrasion and the damage are caused, and the safe and stable operation of the equipment is finally influenced (because the concave surface of the bearing bush, which is in contact with the rotor, has a layer of tungsten alloy, the contact between the concave surface of the bearing bush and the cylindrical surface of the rotor is basically free from problems, and the abrasion between the lower bearing bush and the bearing box mounting.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a steam turbine tile turnover device which is beneficial to reducing abrasion, comprising a tile turnover bracket which is composed of an arc part and horizontal extension parts fixedly connected with both ends of the arc part in the length direction, wherein the horizontal extension parts are provided with first through holes, the horizontal extension parts are detachably and fixedly connected with the middle facet of the lower half bush through fasteners which are matched and penetrated in the first through holes, so that a ring-shaped object which is enclosed by the arc part and the lower half bush in the same plane is sleeved on a rotor which the lower half bush belongs to,
a supporting pulley extends outwards from the concave surface of the arc-shaped part, the supporting pulley comprises a wheel body which is used for rolling and abutting against the outer cylindrical surface of the rotor, a supporting bolt is arranged on the supporting pulley in a matching way, the supporting bolt is spirally matched and extends into the arc-shaped part on the convex surface of the arc-shaped part, so that the wheel body is ensured to be pushed outwards out of the concave surface of the arc-shaped part,
preferably, the method comprises the following steps: the lower half bearing bush is inwards sunken on the middle split surface to form a connecting hole, the connecting hole is used when the lower half bearing bush is connected with the upper half bearing bush through a bolt, so that the connecting hole is a threaded hole and is axially vertical to the middle split surface, the first through hole is a threaded hole, the fastener is a bolt, the bolt is simultaneously and spirally matched and penetrated in the first through hole and the connecting hole, and the tile turning support and the lower half bearing bush are detachably and fixedly connected together,
preferably, the method comprises the following steps: a rubber pad is padded at the contact part of the middle split surface on the lower half bearing bush and the horizontal extension part on the tile turning support, a second through hole which is coaxially arranged with the first through hole and/or the connecting hole is arranged on the rubber pad, when the bolt is simultaneously and spirally matched to penetrate through the first through hole and the connecting hole, the bolt is just coaxially penetrated through the second through hole,
preferably, the method comprises the following steps: two supporting pulleys are arranged on the concave surface of the arc-shaped part, the two supporting pulleys are symmetrically arranged with reference to a connecting line between a central point in the length direction of the arc-shaped part and the circle center of the arc-shaped part, meanwhile, the supporting pulleys extend out of the concave surface of the arc-shaped part along the radius direction of the circle where the arc-shaped part is located, the axial direction of the wheel body on the supporting pulleys is parallel to the axial direction of the rotor,
preferably, the method comprises the following steps: the inner part of the arc part body is provided with a cavity with a strip cuboid structure, a sliding block which can slide along the length direction of the cavity in a reciprocating way is embedded in the cavity in a matching way, a connecting column extends out of the sliding block towards the concave surface of the arc part, the cavity and the connecting column are consistent with the radius of the circle of the arc part in the length direction, the end part of one end of the connecting column far away from the sliding block in the length direction is fixedly provided with a mounting frame, a wheel body is fixedly arranged on the mounting frame in an axially rotatable way, and the supporting pulley comprises the sliding block, the,
the concave surface of the arc-shaped part is provided with an outlet which is communicated with the cavity and the outside, the size of the outlet is smaller than the radial size of the cavity, the wheel body can be pushed out of the arc-shaped part through the outlet when the sliding block is matched and slides in the cavity,
the inside screw thread perforation that still sets up for coaxial with the cavity of arc portion body is seted up, and the screw thread perforation is linked together along self length direction one end and the convex surface of arc portion, and the other end communicates in the cavity, thereby the stay bolt screw fit is worn to locate in the screw thread perforation and is withstood the slider in stretching into the cavity and ejecting from the export with the wheel body.
Drawings
FIG. 1 is a schematic structural view (axial cross-sectional view) of the upper half bearing bush disassembled during the tile-turning process by using the tile-turning device of the present invention,
FIG. 2 is a schematic structural view of the tile-turning device of the present invention installed on the basis of FIG. 1,
figure 3 is a top view of figure 2,
figure 4 is an enlarged view (cross-sectional view) of the structure of the supporting bolt 5 and the supporting pulley 4 circled by a dotted line in figure 2,
figure 5 is an enlarged (cross-sectional) view of the horizontally extending portion 12 of figure 2 encircled by a dashed circle,
fig. 6 is a schematic structural view of fig. 1, in which the lower half shell 2 is lifted up by the support bolt 5 and the support pulley 4, the left and right arrows in the figure respectively show the rotation direction of the driving device during winding and the pulling direction of the wire rope,
FIG. 7 is a schematic view of the structure of the finished tile-turning device based on FIG. 6,
wherein, 1-tile support, 11-arc part, 111-cavity, 112-outlet, 113-screw-threaded hole, 12-horizontal extension part, 121-first through hole, 122-hanger, 2-lower half-bush, 21-attachment hole, 3-rotor, 4-support pulley, 41-wheel body, 42-slider, 43-connection column, 44-mounting rack, 5-support bolt, 6-bolt, 7-rubber pad, 71-second through hole, 8-pad, 9-bearing box mounting groove, 91-bearing box, 10-drive device, 101-wire rope.
Detailed Description
It should be noted that the words "inner" and "outer" used in the description of the present invention refer to directions toward and away from the geometric center of a particular component (e.g., "arc 11" body), respectively, which are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
As shown in the attached drawings, the steam turbine tile-turning device which is helpful for reducing the abrasion of the utility model comprises a tile-turning support 1 which is composed of an arc part 11 and horizontal extension parts 12 which are fixedly connected with both ends of the arc part 11 in the length direction, the horizontal extension parts 12 are plate-shaped bodies, first through holes 121 which are communicated with two plate surfaces of the horizontal extension parts 12 are arranged on the horizontal extension parts 12, the first through holes 121 are axially vertical to the plate surfaces of the horizontal extension parts 12,
correspondingly, the lower half bearing shell 2 is inwards sunken on the middle parting surface to form a connecting hole 21, the connecting hole 21 is vertical to the middle parting surface in the axial direction, the connecting hole 21 and the first through hole 121 are both threaded holes (the connecting hole 21 is used when the lower half bearing shell 2 is connected with the upper half bearing shell by a bolt), the connecting hole 21 and the first through hole 121 are simultaneously and spirally matched and penetrated in the first through hole 121 and the connecting hole 21 through a fastener (a bolt 6), so that the plate surface of the horizontal extension part 12 far away from the arc-shaped part 11 is detachably and fixedly connected with the middle parting surface of the lower half bearing shell 2, the tile turning support 1 and the lower half bearing shell 2 are spliced in the same plane to form a ring-shaped object and are sleeved on the rotor 3 to which the lower half bearing shell 2 belongs, the lower half bearing shell 2 is vertically and downwards matched and arranged in the bearing box mounting groove 9 through the convex surface on the lower half bearing shell 2, and a plurality of cushion blocks, therefore, a larger gap exists between the lower half bearing bush 2 and the bottom of the bearing box mounting groove 9, and the arc part 11 is smaller than the outer diameter of the lower half bearing bush 2 in the outer diameter, so that when the arc part 11 rotates towards the lower part of the rotor 3 in the subsequent bush turning process, the arc part 11 is not contacted with the bearing box mounting groove 9,
a rubber pad 7 is padded at the contact position of the middle split surface on the lower half bearing bush 2 and the surface of the horizontal extension part 12 on the tile turning support 1, a second through hole 71 which is coaxially arranged with the first through hole 121 and/or the connecting hole 21 is formed in the rubber pad 7, and when the bolt 6 is simultaneously and spirally matched to penetrate through the first through hole 121 and the connecting hole 21, the bolt is also just coaxially penetrated through the second through hole 71;
two supporting pulleys 4 are outwards stretched out on the concave surface of arc portion 11 to line between the centre point on the 11 length direction of arc portion and the centre of a circle of arc portion 11 is the benchmark, and two supporting pulleys 4 are each other for the symmetry setting, and each supporting pulley 4 all includes slider 42, spliced pole 43, mounting bracket 44 and wheel body 41, specifically is:
the body of the arc part 11 is internally provided with cavities 111 with a strip cuboid structure corresponding to the two supporting pulleys 4 respectively, the slide block 42 is embedded in the cavities 111 in a reciprocating sliding manner along the length direction of the cavities 111, the slide block 42 extends out of a connecting column 43 towards the concave surface of the arc part 11, the end part of the connecting column 43 far away from the slide block 42 in the length direction is fixedly provided with a mounting rack 44, the wheel body 41 is fixedly arranged on the mounting rack 44 in an axial rotating manner, the concave surface of the arc part 11 is also provided with an outlet 112 which is communicated with the cavities 111 and is coaxial with the cavities 111, the size of the outlet 112 is smaller than the radial size of the cavities 111 (so as to prevent the slide block 42 from sliding out of the cavities 111), the slide block 42 can push the wheel body 41 out of the arc part 11 through the outlet 112 when sliding in the cavities 111 in a matching manner, and because the cavities, the wheel body 41 extends beyond the concave surface of the arc portion 11 in the radial direction of the arc portion 11 (the included angle between the two supporting pulleys 4 is 90 degrees as shown in the figure), and the axial direction of the wheel body 41 and the axial direction of the rotor 3 are parallel to each other,
cooperating with the supporting pulley 4 are: the inside screw thread perforation 113 that still sets up for coaxial with cavity 111 that still sets up of arc portion 11 body, screw thread perforation 113 is linked together along self length direction one end and arc portion 11's convex surface, and the other end communicates in cavity 111, and the stay bolt 5 screw fit is worn to locate in screw thread perforation 113 and is stretched into and withstood slider 42 in cavity 111 to ensure "wheel body 41 is followed export 112 and is pushed out arc portion 11 concave surface" this state.
Based on the device, the lower half bearing bush 2 which is matched and arranged at the bottom of the rotor 3 (the axial direction is horizontal) is turned and disassembled, and the general process is as shown in the attached drawings 1, 2, 6 and 7 in sequence:
before turning the tiles, removing a connecting oil pipe and a temperature element on the bearing bush to prevent the bearing bush from being damaged in the turning process; the upper half bearing shell (not shown) fitted on the upper part of the rotor 3 is removed (directly lifted off), as shown in fig. 1;
the rotor 3 is lifted slightly by means of a shaft lifting device: only one end of the rotor 3 in the length direction is lifted by 1 mm, when the copper rod is used for knocking the split surface of the lower half bearing bush 2 to enable the lower half bearing bush 2 to slightly axially rotate around the circumference direction of the rotor 3, the bearing turning device can be used for turning the bearing (because a large amount of lubricating oil with lubricating and cooling effects is arranged between the rotor 3 and the bearing bush and between the bearing bush and the bearing box installation groove 9 when the rotor 3 normally runs and axially rotates, although the lubricating oil in the bearing box is discharged during the turning process, under many conditions, a small amount of lubricating oil still remains between the rotor 3 and the bearing bush and between the bearing bush and the bearing box installation groove 9 to form mutual adsorption, so that the knocking before the turning is used for breaking the adsorption, so that the lower half bearing bush 2 is in a free state, the turning condition is provided, and the phenomenon that the driving mechanism is overloaded and possibly causes part damage due to the influence of the factors in the turning process is avoided): firstly, covering the shaft body of the rotor 3 with the opening of the arc-shaped part 11 downwards, enabling the first through holes 121 and the connecting holes 21 to be in one-to-one up-and-down correspondence, and then spirally fastening the tile turning support 1 and the lower half bearing bush 2 together through bolts 6 (a rubber pad 7 is arranged between the tile turning support and the lower half bearing bush to prevent the middle split surface of the lower half bearing bush 2 from being damaged), as shown in figure 2;
because the rotor 3 is heavy and the turn-over support 1 is lighter than the lower half bearing bush 2 than the rotor 3, the two support bolts 5 are screwed inwards, based on the reaction force of the rotor 3, the turn-over support 1 can drive the lower half bearing bush 2 to be lifted slightly upwards, so that the lower half bearing bush 2 which directly falls on the bottom of the bearing box mounting groove 9 through the cushion block 8 can be lifted slightly upwards, and accordingly, a gap is correspondingly generated between the lower half bearing bush 2 (the cushion block 8 connected on the convex surface of the lower half bearing bush 2) and the bottom of the bearing box mounting groove 9, as shown in figure 6,
because the turning support 1 always rolls and abuts against the outer cylindrical surface of the rotor 3 through the wheel body 41, the lower half bearing bush 2 and the turning support 1 can smoothly rotate around the circumferential direction of the rotor 3, and simultaneously, because a gap exists between the lower half bearing bush 2 (a cushion block 8 connected on the convex surface of the lower half bearing bush 2) and the bearing box mounting groove 9 at the lower part, the mutual abrasion between the lower half bearing bush 2 and the bottom of the bearing box mounting groove 9 in the process of turning the lower half bearing bush up around the circumferential direction of the rotor 3 can be avoided in the turning process,
the driving device 10 is temporarily and fixedly installed on one axial side of the rotor 3, a hanging lug 122 is originally and fixedly arranged on the horizontal extension part 12 which is positioned on the opposite axial side of the rotor 3 from the driving device 10, the steel wire rope 101 on the driving device 10 is adopted to cross over the rotor 3 and is bound and positioned on the hanging lug 122, the steel wire rope 101 is wound through the driving device 10, and therefore the ring formed by splicing the tile turning support 1 and the lower half bearing bush 2 is synchronously driven to turn over on the rotor 3 in a way of approaching to axial rotation, namely turning over the tile, as shown in figure 7,
when the tile turning support 1 is turned to the lower part of the rotor 3, correspondingly, the lower half bearing bush 2 is turned to the upper part of the rotor 3 (because the convex surface of the lower half bearing bush 2 and the cushion block 8 are connected and fixed together through the counter bore bolt, the cushion block 8 on the convex surface of the lower half bearing bush 2 is also turned out), the lower half bearing bush 2 is hung by a hoisting trolley, the bolt 6 at the split position between the tile turning support 1 and the lower half bearing bush 2 is detached by a spanner, the two persons respectively lift the tile turning support 1 from two axial sides of the rotor 3 by hands and lightly place the support on the channel of the bearing box installation groove 9 (only the lower half bearing bush 2 usually has a weight of several hundred kilograms, the support of a low-pressure rotor of 30 ten thousand units which is actually designed and put into use by the applicant is hung stably, the tile turning support 1 has a light weight, and only the two persons can completely lift the support stably, Transfer), finally, the lower half bearing bush 2 is completely lifted away from the rotor 3 to finish the disassembly (when the bearing bush and the contact part of the bearing bush and the rotor 3 are checked or repaired, the bearing bush must be disassembled from the rotor 3),
similarly, when the bearing shell is returned, the lower half bearing shell 2 is reversely buckled, firstly, the lower half bearing shell is lifted to the position above the rotor 3 by a lifting crane to be close to the cylindrical surface of the rotor 3, two persons respectively lift the tile turning support 1 from the two axial sides of the rotor 3 by hands to enable the tile turning support 1 to be separated from a channel of the bearing box installation groove 9, a bolt 6 at the split position between the tile turning support 1 and the lower half bearing shell 2 is tightened by a spanner, and the lifting crane releases the lower half bearing shell 2, so that the lower half bearing shell 2 can be turned back to the original position by a driving device (relative to the driving device 10 and the steel wire rope 101 for tile turning) positioned at the other axial side of the rotor 3 and the steel wire.
Claims (5)
1. A steam turbine tile turning apparatus that facilitates reducing wear, comprising: the device comprises a tile turning support (1) consisting of an arc-shaped part (11) and horizontal extension parts (12) fixedly connected with two ends of the arc-shaped part (11) in the length direction, wherein a first through hole (121) is formed in each horizontal extension part (12), the horizontal extension parts (12) and the middle facets of the lower half bearing bushes (2) are detachably and fixedly connected together through fasteners penetrating through the first through holes (121), so that a ring-shaped object formed by the arc-shaped part (11) and the lower half bearing bushes (2) in the same plane is sleeved on a rotor (3) to which the lower half bearing bushes (2) belong,
outwards stretch out on the concave surface of arc portion (11) and have support pulley (4), support pulley (4) are gone up including being used for the roll to lean on wheel body (41) on the outer face of cylinder of rotor (3), the cooperation support pulley (4) are provided with supporting bolt (5), through supporting bolt (5) in spiral cooperation stretches into on the convex surface of arc portion (11) in arc portion (11), thereby ensure will wheel body (41) outwards are ejecting the concave surface of arc portion (11).
2. The turbine tile assembly that facilitates reducing wear of claim 1, wherein: be equipped with two on the concave surface of arc portion (11) support pulley (4), with central point on arc portion (11) length direction with line between the centre of a circle of arc portion (11) is the benchmark, two support pulley (4) each other be the symmetry setting, simultaneously, support pulley (4) are followed the radial direction of arc portion (11) stretches out the concave surface of arc portion (11), the axial of wheel body (41) with the axial of rotor (3) is parallel to each other.
3. The turbine tile assembly that facilitates reducing wear of claim 1, wherein: the structure is characterized in that a cavity (111) with a strip cuboid structure is formed in the arc-shaped part (11) body, a sliding block (42) capable of sliding in a reciprocating mode along the length direction of the cavity (111) is embedded in the cavity (111) in a matching mode, a connecting column (43) extends out of the sliding block (42) towards the concave surface of the arc-shaped part (11), the cavity (111) and the connecting column (43) are consistent with the radius of the arc-shaped part (11) in the length direction, a mounting frame (44) is fixedly arranged at the end part, far away from the sliding block (42), of the connecting column (43) in the length direction, the wheel body (41) is fixedly mounted on the mounting frame (44) in an axial rotating mode, the supporting pulley (4) comprises the sliding block (42), the connecting column (43), the mounting frame (44) and the wheel body (41),
an outlet (112) communicated with the cavity (111) and the outside is formed in the concave surface of the arc-shaped part (11), the size of the outlet (112) is smaller than the radial size of the cavity (111), the sliding block (42) can push the wheel body (41) out of the arc-shaped part (11) through the outlet (112) when the sliding block (42) is matched and slides in the cavity (111),
the inner part of the arc-shaped part (11) body is further provided with a thread through hole (113) which is coaxially arranged with the cavity (111), one end of the thread through hole (113) is communicated with the convex surface of the arc-shaped part (11) along the length direction of the thread through hole, the other end of the thread through hole is communicated with the cavity (111), and the supporting bolt (5) is spirally matched with the thread through hole (113) and extends into the cavity (111) to support the sliding block (42) so as to eject the wheel body (41) from the outlet (112).
4. The turbine tile assembly that facilitates reducing wear of claim 1, wherein: the lower half bearing bush (2) is inwards recessed on the split surface to form a connecting hole (21), the connecting hole (21) is perpendicular to the split surface in the axial direction, the connecting hole (21) and the first through hole (121) are threaded holes, the fastening piece is a bolt (6), and the bolt (6) is simultaneously and spirally matched to penetrate through the first through hole (121) and the connecting hole (21), so that the tile turning support (1) is detachably and fixedly connected with the lower half bearing bush (2).
5. The turbine tile assembly that facilitates reducing wear of claim 4, wherein: the middle split surface on the lower half bearing bush (2) is padded with a rubber pad (7) at the contact position of the horizontal extension part (12) on the tile turning support (1), a second through hole (71) which is coaxially arranged with the first through hole (121) and/or the connecting hole (21) is formed in the rubber pad (7), and when the bolt (6) is simultaneously and spirally matched to penetrate through the first through hole (121) and the connecting hole (21), the bolt is also just coaxially penetrated through the second through hole (71).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022140749.XU CN213141348U (en) | 2020-09-26 | 2020-09-26 | Steam turbine tile turning device beneficial to reducing abrasion |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022140749.XU CN213141348U (en) | 2020-09-26 | 2020-09-26 | Steam turbine tile turning device beneficial to reducing abrasion |
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| CN213141348U true CN213141348U (en) | 2021-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022140749.XU Active CN213141348U (en) | 2020-09-26 | 2020-09-26 | Steam turbine tile turning device beneficial to reducing abrasion |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113753728A (en) * | 2021-07-23 | 2021-12-07 | 中广核核电运营有限公司 | Bearing turning method for turbonator |
| CN113944520A (en) * | 2021-09-28 | 2022-01-18 | 中核核电运行管理有限公司 | Turbo-generator bearing bush overturning device and method |
-
2020
- 2020-09-26 CN CN202022140749.XU patent/CN213141348U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113753728A (en) * | 2021-07-23 | 2021-12-07 | 中广核核电运营有限公司 | Bearing turning method for turbonator |
| CN113753728B (en) * | 2021-07-23 | 2024-03-12 | 中广核核电运营有限公司 | Bearing turning method for steam turbine generator |
| CN113944520A (en) * | 2021-09-28 | 2022-01-18 | 中核核电运行管理有限公司 | Turbo-generator bearing bush overturning device and method |
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