CN209872108U

CN209872108U - Special tool for lifting shaft of steam turbine

Info

Publication number: CN209872108U
Application number: CN201920570805.8U
Authority: CN
Inventors: 张继东; 梁卓文
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-04-24
Filing date: 2019-04-24
Publication date: 2019-12-31
Anticipated expiration: 2029-04-24

Abstract

The utility model discloses a special tool for lifting a shaft of a steam turbine, which comprises a cross beam, two suspension arms, two suspension pieces, two sliding blocks and two adjusting rods; the two sliding blocks are connected to the upper end of the cross beam in a sliding manner and are opposite to each other; the adjusting rod is rotatably connected with the two sliding blocks and is positioned between the two sliding blocks, and the two sliding blocks are close to and far away from each other by rotating the adjusting rod; one end of one suspension arm is hinged with one sliding block, and one end of the other suspension arm is hinged with the other sliding block; the hanging piece is a semi-ring body, two ends of the semi-ring body are respectively hinged with the other ends of the two suspension arms, the two suspension arms are driven to be close to and far away from each other through the sliding blocks, and then a rotating shaft of the steam turbine rises and falls. The utility model discloses form a special lift axle instrument, reduce and lift the axle degree of difficulty, coefficient when improving the maintenance simultaneously reduces the risk.

Description

Special tool for lifting shaft of steam turbine

Technical Field

The utility model relates to a lift a equipment field, concretely relates to steam turbine lifts a specialized tool.

Background

A steam turbine is a rotary power machine that converts the energy of steam into mechanical work. Also known as steam turbines. The engine is mainly used as a prime mover for power generation, and can directly drive various pumps, fans, compressors, ship propellers and the like. When the steam turbine supporting bearing bush is in failure or needs to be adjusted and maintained, a special tool is needed to lift the rotating shaft of the steam turbine because the rotating shaft of the steam turbine is very heavy.

At present, a rotating shaft of a steam turbine is lifted by various methods, such as lifting the rotating shaft by a steel wire wheel and a pulley, and lifting the rotating shaft by a hydraulic thousand golden tops. However, the method does not form a special shaft lifting tool, the safety coefficient is not high, and the operation is not stable enough. In addition, when the rotating shaft is maintained, the maintenance requirement can be met only by lifting the rotating shaft by about 1mm in height under most conditions, and the problem that the coefficient is too large and the risk is too high exists when the rotating shaft with the weight of the upper ton is lifted too high.

SUMMERY OF THE UTILITY MODEL

To the defect among the prior art, the utility model provides a steam turbine lifts a specialized tool to form a special axle lifting tool, reduce and lift the axle degree of difficulty, coefficient when improving the maintenance simultaneously reduces the risk.

The utility model provides a special tool for lifting a shaft of a steam turbine, which comprises a crossbeam, two suspension arms, two suspension pieces, two sliding blocks and two adjusting rods; the two sliding blocks are connected to the upper end of the cross beam in a sliding manner and are opposite to each other; the adjusting rod is rotatably connected with the two sliding blocks and is positioned between the two sliding blocks, and the two sliding blocks are close to and far away from each other by rotating the adjusting rod;

one end of one suspension arm is hinged with one sliding block, and one end of the other suspension arm is hinged with the other sliding block; the hanging piece is a semi-ring body, two ends of the semi-ring body are respectively hinged with the other ends of the two suspension arms, the two suspension arms are driven to be close to and far away from each other through the sliding blocks, and then a rotating shaft of the steam turbine rises and falls.

Preferably, the upper end of the cross beam is provided with a slide way, and the two slide blocks are connected with the cross beam in a sliding manner through the slide way.

The slide way supports the sliding of the sliding block, bears the gravity of the rotating shaft, provides a stable track for the movement of the sliding block and ensures the sliding stability of the sliding block.

Preferably, the adjusting rod is a screw rod, and two ends of the screw rod are respectively connected with the two sliding blocks in a rotating manner; the middle part of the adjusting rod is provided with a nut fixedly connected with the adjusting rod, and the adjusting rod is rotated by rotating the nut.

Threaded holes matched with the screw rods are formed in the two sliding blocks, but the threads of the threaded holes of the two sliding blocks are opposite. When the adjusting rod rotates, the two sliding blocks approach to each other; when the adjusting rod rotates in the direction, the two sliding blocks are far away from each other, so that the sliding control of the sliding blocks is realized.

Preferably, the cross beam is arched in cross section, the hanger is a semi-ring body, and the diameter of the hanger is the same as that of the rotating shaft of the steam turbine.

When the shaft is lifted, the rotating shaft is placed in the hanging piece, and the rotating shaft is prevented from shaking.

Preferably, two lower ends of the cross beam are respectively provided with an adjusting cushion block, and the cross beam is arranged on the bearing box through the adjusting cushion blocks.

Preferably, the adjusting cushion blocks comprise upper wedge blocks and lower wedge blocks, the upper end planes of the upper wedge blocks are fixedly connected with the lower ends of the cross beams, the inclined planes of the lower ends of the upper wedge blocks are in contact with the inclined planes of the upper ends of the lower wedge blocks, and adjusting bolts are arranged on two sides of the lower wedge blocks and used for pushing the upper wedge blocks to slide on the inclined planes in the lower wedge blocks.

Preferably, the upper end of each lower wedge-shaped seat is provided with a groove, and the inclined plane of the lower wedge-shaped seat is positioned in the groove.

Preferably, each lower wedge seat is provided with six adjusting bolts, three adjusting bolts are rotatably connected to one side wall of the groove, the other three adjusting bolts are rotatably connected to the other side wall of the groove, and the six adjusting bolts are opposite to each other.

When the shaft is lifted, the cross beam is fixed on the bearing box. When the height of the cross beam needs to be increased or decreased in a large range, the upper wedge block is extruded by screwing the adjusting bolt to slide on the inclined surface in the lower wedge block, and meanwhile, the upper wedge block pushes the cross beam to ascend or descend so as to achieve height adjustment in a large range.

Preferably, the lower end faces of the lower wedge-shaped seats are provided with downward steps.

When carrying out the operation of lifting the axle, during hole or the hole on the positive bearing box of step card, prevent that the long-time bearing of crossbeam from appearing and to the problem of sidesway to both sides, guaranteed the safety in the maintenance process.

Preferably, the cross beam is provided with two telescopic cylinders for respectively pushing the sliding blocks to move; and the cylinder seats of the telescopic cylinders are fixedly connected with the cross beam, and the telescopic cylinders of the telescopic cylinders are fixedly connected with the corresponding sliding blocks.

The telescopic cylinder can be an air cylinder, a hydraulic cylinder or an electric cylinder, the example of manually screwing the nut to adjust the sliding blocks is replaced, and manual operation is reduced.

The beneficial effects of the utility model are embodied in:

the crossbeam is arranged on the bearing box body, the hanging piece is arranged below the rotating shaft and is hinged with the two suspension arms, the two sliding blocks are enabled to be close to each other by rotating the adjusting rod, meanwhile, the hanging piece drives the rotating shaft to ascend after the distance between the upper ends of the two suspension arms is reduced, the gravity center of the rotating shaft moves upwards in a small range, namely, the rotating shaft ascends by about 1mm, and maintenance operation can be carried out after the rotating shaft ascends. The device is specially used for a steam turbine rotating shaft, forms a special shaft lifting tool, is simple and effective in implementation mode, and reduces the shaft lifting difficulty. This equipment structure is firm stable, coefficient when improving the maintenance, reduces the risk.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

FIG. 1 is a schematic structural diagram of the present embodiment;

FIG. 2 is an enlarged view taken at A in FIG. 1;

FIG. 3 is a schematic structural view of the lower wedge base in the present embodiment;

fig. 4 is a bottom view of fig. 3.

In the attached drawing, a cross beam 1, a suspension arm 2, a suspension piece 3, a sliding block 4, an adjusting rod 5, a nut 6, a hoisting hole 7, a telescopic cylinder 8, an adjusting cushion block 9, an upper wedge block 10, a lower wedge block 11, a groove 12, an adjusting bolt 13, a step 14, a rotating shaft 15 and a clamping sleeve 16.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.

As shown in fig. 1, the present embodiment provides a special tool for lifting a shaft of a steam turbine, which includes a cross beam 1, a suspension arm 2, a hanger 3, a slider 4, and an adjusting rod 5, where two sliders 4 and two suspension arms 2 are provided. The cross section of the beam 1 is arched, and the beam 1 is provided with two hoisting holes 7 for hoisting.

The hanging piece 3 is a semi-ring body, and the diameter of the hanging piece 3 is the same as that of a rotating shaft of the steam turbine.

The specific structure of the equipment is as follows:

two sliding blocks 4 are connected to the upper end of the beam 1 by sliding, and the two sliding blocks 4 are opposite. The upper end of the cross beam 1 is provided with a slide way, and the two sliding blocks 4 are connected with the cross beam 1 in a sliding mode through the slide way. The adjusting rod 5 is rotatably connected with the two sliding blocks 4 and is positioned between the two sliding blocks 4, and the two sliding blocks 4 are close to and far away from each other by rotating the adjusting rod 5. The adjusting rod 5 is a screw rod, and two ends of the screw rod are respectively rotatably connected with the two sliding blocks 4; the middle part of the adjusting rod 5 is provided with a nut 6 fixedly connected with the adjusting rod 5, and the adjusting rod 5 is rotated by rotating the nut 6. Threaded holes matched with the screw rods are formed in the two sliding blocks 4, but the threads of the threaded holes of the two sliding blocks 4 are opposite. When the adjusting rod 5 rotates, the two sliding blocks 4 approach to each other; when the adjusting rod 5 rotates in the direction, the two sliding blocks 4 are far away, so that the sliding control of the sliding blocks 4 is realized.

One end of one suspension arm 2 is hinged with one sliding block 4, and one end of the other suspension arm 2 is hinged with the other sliding block 4. Hang 3 for the hemicycle body and the both ends of hemicycle body are articulated with the other one end of two suspension arms 2 respectively, drive two suspension arms 2 through slider 4 and be close to and keep away from, and then make the pivot of steam turbine rise and descend.

In the actual operation process, firstly, the cross beam 1 is spanned and fixedly installed on the bearing box, then the hanging piece 3 is installed below the rotating shaft, and the hanging piece 3 is hinged with the two suspension arms 2. The two sliding blocks 4 are close to each other by rotating the nut 6 on the adjusting rod 5 through a spanner or other tools, and meanwhile, the hanging piece 3 drives the rotating shaft to rise after the distance between the upper ends of the two hanging arms 2 is reduced, the gravity center of the rotating shaft moves upwards in a small range, namely, rises by about 1mm, and maintenance operation can be carried out after the rotating shaft rises. The device is specially used for a steam turbine rotating shaft, forms a special shaft lifting tool, is simple and effective in implementation mode, and reduces the shaft lifting difficulty. This equipment structure is firm stable, coefficient when improving the maintenance, reduces the risk.

In order to reduce the manpower output and reduce the labor intensity, the embodiment further includes another scheme, which is specifically as follows:

the beam 1 is provided with two telescopic cylinders 8 for respectively pushing the sliding blocks 4 to move. Specifically, the cylinder seats of the telescopic cylinders 8 are all fixedly connected with the beam 1, and the telescopic cylinders 8 of the telescopic cylinders 8 are all fixedly connected with the corresponding sliding blocks 4. The telescopic cylinder 8 can be an air cylinder, a hydraulic cylinder or an electric cylinder, the example of manually screwing the nut 6 to adjust the space between the sliding blocks 4 is replaced, and manual operation is reduced. The air cylinder is matched with a corresponding pneumatic system, the hydraulic cylinder is matched with a corresponding hydraulic system, and the electric cylinder is matched with a corresponding electric control system. When using the telescopic cylinder 8 to adjust the distance between the sliders 4, can carry out the locking of slider 4 position through nut 6, be equipped with the cutting ferrule that is used for card main nut 6 on the crossbeam 1, with 6 card of nut in the cutting ferrule make the locking of regulation pole 5 prevent to rotate when not moving slider 4, further guarantee safety.

In a few cases the spindle requires a large height adjustment, i.e. a height adjustment range of more than 1 mm. The present embodiment adopts the following manner:

as shown in fig. 2 to 4, the two lower ends of the beam 1 are provided with adjusting pads 9, and the beam 1 is mounted on the bearing housing through the adjusting pads 9. The adjusting cushion blocks 9 respectively comprise an upper wedge block 10 and a lower wedge block 11, the upper end plane of the upper wedge block 10 is fixedly connected with the lower end of the cross beam 1, the inclined plane at the lower end of the upper wedge block 10 is in contact with the inclined plane at the upper end of the lower wedge block 11, and adjusting bolts 13 are respectively arranged on two sides of the lower wedge block 11 and used for pushing the upper wedge block 10 to slide on the inclined plane inside the lower wedge block 11. The upper end of each lower wedge-shaped seat 11 is provided with a groove 12, and the inclined plane of the lower wedge-shaped seat 11 is positioned in the groove 12. Each lower wedge-shaped seat 11 is provided with six adjusting bolts 13, wherein three adjusting bolts 13 are rotatably connected to one side wall of the groove 12, the other three adjusting bolts 13 are rotatably connected to the other side wall of the groove 12, and the six adjusting bolts 13 are opposite to each other. The cross member 1 is fixed to the bearing housing during the shaft raising operation. When it is necessary to raise or lower the height of the cross beam 1 over a wide range, the upper wedge 10 is pressed by screwing the adjusting bolt 13 so that the upper wedge 10 slides on the slope inside the lower wedge 11, and at the same time, the upper wedge 10 will push the cross beam 1 to rise or fall, so as to achieve a wide range of height adjustment.

Because the rotating shaft of the steam turbine weighs several tons or tens of tons, in order to prevent the cross beam 1 from bearing for a long time and moving towards both sides, the lower end surface of each lower wedge-shaped seat 11 is provided with a downward step 14. When carrying out the operation of lifting the axle, the hole or the hole on the positive bearing box of step 14 card prevent that long-time bearing of crossbeam 1 from appearing moving toward both sides side, has guaranteed the safety in the maintenance process.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.

Claims

1. The utility model provides a steam turbine lifts a specialized tool which characterized in that: the device comprises a cross beam, two suspension arms, two hanging pieces, two sliding blocks and two adjusting rods; the two sliding blocks are connected to the upper end of the cross beam in a sliding manner and are opposite to each other; the adjusting rod is rotatably connected with the two sliding blocks and is positioned between the two sliding blocks, and the two sliding blocks are close to and far away from each other by rotating the adjusting rod;

2. The special tool for lifting the shaft of the steam turbine according to claim 1, wherein: the upper end of the cross beam is provided with a slide way, and the two slide blocks are connected with the cross beam in a sliding manner through the slide way.

3. The special tool for lifting the shaft of the steam turbine according to claim 1, wherein: the adjusting rod is a screw rod, and two ends of the screw rod are respectively in rotating connection with the two sliding blocks; the middle part of the adjusting rod is provided with a nut fixedly connected with the adjusting rod, and the adjusting rod is rotated by rotating the nut.

4. The special tool for lifting the shaft of the steam turbine according to claim 1, wherein: the cross section of the crossbeam is arched, the hanging piece is a semi-ring body, and the diameter of the hanging piece is the same as that of a rotating shaft of the steam turbine.

5. The special tool for lifting the shaft of the steam turbine according to claim 4, wherein: and two lower ends of the cross beam are respectively provided with an adjusting cushion block, and the cross beam is arranged on the bearing box through the adjusting cushion blocks.

6. The special tool for lifting the shaft of the steam turbine according to claim 5, wherein: the adjusting cushion blocks comprise upper wedge blocks and lower wedge blocks, the upper end planes of the upper wedge blocks are fixedly connected with the lower ends of the cross beams, the inclined planes of the lower ends of the upper wedge blocks are in contact with the inclined planes of the upper ends of the lower wedge blocks, and adjusting bolts are arranged on two sides of the lower wedge blocks and used for pushing the upper wedge blocks to slide on the inclined planes in the lower wedge blocks.

7. The special tool for lifting the shaft of the steam turbine according to claim 6, wherein: and the upper end of each lower wedge-shaped seat is provided with a groove, and the inclined plane of each lower wedge-shaped seat is positioned in the groove.

8. The special tool for lifting the shaft of the steam turbine according to claim 7, wherein: each lower wedge seat is provided with six adjusting bolts, three of the adjusting bolts are rotatably connected to one side wall of the groove, the other three adjusting bolts are rotatably connected to the other side wall of the groove, and the six adjusting bolts are opposite to each other.

9. The special tool for lifting the shaft of the steam turbine according to claim 6, wherein: the lower end face of the lower wedge-shaped seat is provided with downward steps.

10. The special tool for lifting the steam turbine shaft according to any one of claims 1 to 9, wherein: the beam is provided with two telescopic cylinders for respectively pushing the sliding blocks to move; and the cylinder seats of the telescopic cylinders are fixedly connected with the cross beam, and the telescopic cylinders of the telescopic cylinders are fixedly connected with the corresponding sliding blocks.