CN112744687A

CN112744687A - Steam turbine rotor lifting tool

Info

Publication number: CN112744687A
Application number: CN202011585903.2A
Authority: CN
Inventors: 吴吉祥
Original assignee: Huaneng Shandong Sishui New Energy Co ltd
Current assignee: Huaneng Shandong Sishui New Energy Co ltd
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2021-05-04
Anticipated expiration: 2040-12-29
Also published as: CN112744687B

Abstract

The invention discloses a steam turbine rotor lifting tool, which belongs to the technical field of steam turbine rotors and comprises a lifting seat, lifting ropes, hooks, a balance mechanism, a moving mechanism and a balance detection mechanism, wherein the top of the lifting seat is connected with the hooks through four groups of lifting ropes and is connected with a travelling crane through the hooks, the balance mechanism is arranged in the middle of the bottom of the lifting seat, the moving mechanisms are arranged on two sides of the lifting seat and are connected with a lower suspension component at the bottom through the moving mechanisms at two ends; when the device is used, the lower suspension assemblies are firstly hung on shaft necks at two ends of the rotor respectively, the distance between the lower suspension assemblies of the device can be adjusted through the moving mechanism at the bottom of the lifting seat, and the balance adjustment direction of the device is judged according to the display data of the balance on the two lifting ropes in the middle, so that preliminary balance adjustment is carried out through the balance mechanism on the lifting seat, and further the lifting tool meets the lifting condition.

Description

Steam turbine rotor lifting tool

Technical Field

The invention relates to the technical field of steam turbine rotors, in particular to a steam turbine rotor hoisting tool.

Background

In the process of manufacturing the steam turbine, a steam turbine rotor needs to be lifted according to the requirements of processing and assembling. The steam turbine rotor is a large workpiece, and a special hoisting tool is required to be used so as to ensure the safety of the workpiece and the human body. The lifting tool mainly comprises a cross beam and a pair of lifting frames hung on the cross beam, wherein the slings of the two lifting frames are respectively hung on shaft necks at two ends of the rotor, and the crane hooks are hung on the gravity center part of the cross beam.

The existing hoisting tool is designed according to the actual weight and size of each rotor, the load capacity, sling span and the like of the existing hoisting tool are determined to be unchanged, and the existing hoisting tool has no universality. The steam turbine has a plurality of models and specifications, a manufacturer needs to configure a plurality of sets of hoisting tools for standby, a large amount of materials are consumed, and the manufacturing cost is increased. Because the steam turbine manufacturing cycle is very long, and the batch is few, usually single unit order, and most lifting tool is idle for a long time, occupies the instrument storehouse, and the maintenance is kept at a high expense.

Disclosure of Invention

The invention aims to provide a steam turbine rotor hoisting tool to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

a steam turbine rotor lifting tool comprises a lifting seat, lifting ropes, hooks, a balance mechanism, a moving mechanism and a balance detection mechanism, wherein the top of the lifting seat is connected with the hooks through four groups of lifting ropes and is connected with a travelling crane through the hooks;

the balance mechanism comprises a balance block, a first transmission gear and a first driving motor, the balance block is connected to the interior of a lifting shell of the lifting seat in a sliding mode, transmission teeth are arranged at the bottom of the balance block and are meshed with the first transmission gear through the transmission teeth, the first transmission gear is rotationally connected to a balance box of the balance mechanism in a gathering mode, a driving shaft of the first transmission gear penetrates through the shell of the balance box and is connected with an output shaft of the first driving motor, and the first driving motor is installed on the shell of the balance box;

the moving mechanism comprises a limiting guide rail, a moving seat, meshing teeth, a second transmission gear and a second driving motor, the limiting guide rail is arranged on two sides of the bottom of the lifting shell and is in sliding connection with the moving seat through the limiting guide rail, the second transmission gear is rotatably connected inside the moving seat and is meshed with the meshing teeth at the bottom of the lifting shell, the middle of the second transmission gear is connected with an output shaft of the second driving motor through a transmission shaft, and the second driving motor is installed on the shell of the moving seat.

As a further scheme of the invention: the middle two groups of the four groups of lifting ropes are in working states to divide the lifting seat into three equal parts, a lifting scale is arranged on the lifting seat, and the two groups of the lifting ropes on the two sides are in non-working states to connect the edge of the lifting seat with the hook.

As a still further scheme of the invention: the balance detection mechanism comprises balance liquid, a magnetic block and a suspension block, the balance liquid forms a complete loop in the vertical direction through a balance pipe, the two end faces of the balance liquid are connected with the magnetic block through the suspension block, and the magnetic block, the suspension block and the inner wall of the balance pipe form sliding contact sealing.

As a still further scheme of the invention: the balance detection mechanism further comprises an electromagnetic coil and an ammeter, wherein the electromagnetic coils are arranged on the balance pipes on two sides of the lifting seat and located at the same horizontal height, and the electromagnetic coils are installed on the lifting seat through the ammeter.

As a still further scheme of the invention: the ammeter is electrically connected with the timer and the processor in sequence.

As a still further scheme of the invention: the processor is electrically connected with the display.

As a still further scheme of the invention: and two ends of the limiting guide rail are provided with limiting seats.

Compared with the prior art, the invention has the beneficial effects that:

when the device is used, the lower suspension assemblies are respectively hung on shaft necks at two ends of the rotor, wherein the distance between the lower suspension assemblies of the device can be adjusted through the moving mechanism at the bottom of the lifting seat, so that the device can meet the use requirements of a plurality of rotors with different sizes, and a manufacturer is prevented from needing to configure a plurality of sets of lifting tools for standby according to the rotors, consuming a large amount of materials and increasing the manufacturing cost; after the rotor is hung, slowly hoisting the hoisting seat below through the row hoisting hook at the top, and judging the balance adjustment direction of the device according to the display data of the hoists on the two hoisting ropes in the middle, so that the balance adjustment is preliminarily carried out through the balance mechanism on the hoisting seat, and the hoisting tool meets the hoisting condition; the device also detects the balance state of the device through a balance detection mechanism and finely adjusts the balance condition of the subsequent lifting seat according to the electromagnetic effect.

Drawings

FIG. 1 is a schematic view of a steam turbine rotor lifting tool assembly.

Fig. 2 is a schematic structural diagram of a balancing mechanism in a turbine rotor lifting tool.

FIG. 3 is a schematic structural view of a moving mechanism in the steam turbine rotor lifting tool.

Fig. 4 is a schematic structural diagram of a balance detection mechanism in the turbine rotor hoisting tool.

Fig. 5 is a schematic view of a connection structure of a balance detecting mechanism in the turbine rotor hoisting tool.

In the figure: 1-lifting seat, 2-lifting scale, 3-lifting rope, 4-hook, 5-balance mechanism, 51-balance block, 52-first transmission gear, 53-first driving motor, 6-moving mechanism, 61-limit guide rail, 62-moving seat, 63-meshing gear, 64-second transmission gear, 65-transmission shaft, 66-second driving motor, 7-lower suspension component, 8-balance detection mechanism, 81-balance liquid, 82-magnetic block, 83-electromagnetic coil, 84-suspension block, 85-ammeter, 9-timer, 10-processor, 11-lifting shell, 12-display and 13-limit seat.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if there is a directional indication (such as up, down, left, right, front, and back) in the embodiment of the present invention, it is only used to explain the relative position relationship between the components, the motion situation, and the like in a certain posture, and if the certain posture is changed, the directional indication is changed accordingly.

In addition, if the description of "first", "second", etc. is referred to in the present invention, it is used for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

Referring to fig. 1 to 3, in the embodiment of the present invention, a steam turbine rotor lifting tool includes a lifting seat 1, lifting ropes 3, hooks 4, a balance mechanism 5, a moving mechanism 6, and a balance detection mechanism 8, where the top of the lifting seat 1 is connected to the hooks 4 through four sets of lifting ropes 3, and is connected to a parallel crane through the hooks 4, the balance mechanism 5 is disposed in the middle of the bottom of the lifting seat 1, the moving mechanisms 6 are disposed on two sides of the lifting seat 1, and are connected to a lower suspension assembly 7 at the bottom through the moving mechanisms 6 at two ends, the lower suspension assembly 7 is connected to a steam turbine rotor, and the balance detection mechanism 8 is further disposed in the length direction of the lifting seat 1;

the balance mechanism 5 comprises a balance block 51, a first transmission gear 52 and a first driving motor 53, the balance block 51 is connected to the interior of the lifting shell 11 of the lifting seat 1 in a sliding manner, transmission teeth are arranged at the bottom of the balance block 51 and are meshed with the first transmission gear 52 through the transmission teeth, the first transmission gear 52 is rotatably connected to a balance box of the balance mechanism 5, a driving shaft of the first transmission gear 52 penetrates through the balance box shell to be connected with an output shaft of the first driving motor 53, and the first driving motor 53 is installed on the shell of the balance box;

the moving mechanism 6 comprises a limiting guide rail 61, a moving seat 62, meshing teeth 63, a second transmission gear 64 and a second driving motor 66, the limiting guide rail 61 is arranged on two sides of the bottom of the lifting shell 11 and is in sliding connection with the moving seat 62 through the limiting guide rail 61, the second transmission gear 64 is rotatably connected inside the moving seat 62, the second transmission gear 64 is meshed with the meshing teeth 63 at the bottom of the lifting shell 11, the middle of the second transmission gear 64 is connected with an output shaft of the second driving motor 66 through a transmission shaft 65, and the second driving motor 66 is mounted on the shell of the moving seat 62.

In the embodiment, when the device is used, the lower suspension assemblies 7 are firstly hung on shaft necks at two ends of the rotor respectively, wherein the distance between the lower suspension assemblies 7 of the device can be adjusted through the moving mechanism 6 at the bottom of the lifting seat 1, so that the device can meet the use requirements of the rotors with different sizes, and a manufacturer is prevented from being required to configure a plurality of sets of lifting tools for standby according to the rotors, consuming a large amount of materials and increasing the manufacturing cost; after the rotor is hung, the lifting seat 1 below is slowly lifted by the row lifting hook 4 at the top, and the balance adjustment direction of the data judgment device is displayed according to the lifting scales 2 on the two lifting ropes 3 in the middle, so that preliminary balance adjustment is performed through the balance mechanism 5 on the lifting seat 1, and further the lifting tool meets the lifting condition.

The specific adjustment process of the moving mechanism 6 is that, the bottom of the lifting shell 11 is provided with the meshing teeth 63, and the second transmission gear 64 is installed through the matching of the meshing teeth 63, the device drives the second transmission gear 64 to rotate through the second driving motor 66, so that the rotation motion is converted into the linear motion of the second transmission gear 64 in the linear direction of the meshing teeth 63 through the matching of the second transmission gear 64 and the meshing teeth 63, in the process, the moving mechanism 6 forms sliding connection with the limiting guide rail 61 of the lifting seat 1 through the moving seat 62, and then the linear position adjustment of the moving mechanism 6 is completed, and the device can meet the lifting requirements of steam turbine rotors with different sizes and lengths.

The specific balance adjustment process is that, the balance box fixed mounting at the bottom of the balance mechanism 5 is at the middle bottom surface of the lifting seat 1, the first driving motor 53 drives the first transmission gear 52 to perform rotary motion, and the first transmission gear 52 is meshed with the balance block 51, so that the rotary motion of the first transmission gear 52 can drive the balance block 51 to perform linear sliding in the lifting seat 1, and further the rotor weight in the lifting process is balanced.

Referring to fig. 1, as a preferred embodiment of the present invention, the middle two sets of four sets of lifting ropes 3 are in an operating state to divide the lifting seat 1 into three equal parts, and a hanging balance 2 is installed thereon, and the two sets of lifting ropes 3 on both sides are in an inoperative state to connect the edge of the lifting seat 1 with a hook 4.

In the embodiment, the crane scale 2 is used for primarily measuring the weight of two sides of the rotor in the hoisting process, so that the hoisting base 1 can be safely hoisted; two sets of lifting ropes 3 of both sides are used for carrying out safety protection to lifting seat 1, prevent to lift by crane two lifting ropes 3 fracture at process middle part.

Referring to fig. 4, as another preferred embodiment of the present invention, the balance detecting mechanism 8 includes a balance liquid 81, a magnetic block 82 and a suspension block 84, the balance liquid 81 forms a complete loop in a vertical direction through a balance tube, two end surfaces of the balance liquid 81 are connected to the magnetic block 82 through the suspension block 84, and the magnetic block 82 and the suspension block 84 form a sliding contact seal with an inner wall of the balance tube.

In this embodiment, in the hoisting process, since the weights at the two sides cannot reach absolute balance, the two end faces of the balance liquid 81 inside the balance detection mechanism 8 will shake up and down at this time, so that the suspension block 84 at the top of the balance liquid 81 can drive the magnetic block 82 to move up and down in the electromagnetic coil 83, and current fluctuation is formed.

Referring to fig. 4, as another preferred embodiment of the present invention, the balance detecting mechanism 8 further includes an electromagnetic coil 83 and an ammeter 85, the electromagnetic coils 83 are disposed on the balance pipes on both sides of the lifting seat 1, the electromagnetic coils 83 are located at the same horizontal height, and the electromagnetic coils 83 are mounted on the lifting seat 1 through the ammeter 85.

In the present embodiment, the magnetic block 82 cuts the electromagnetic coil 83 up and down, so that corresponding current fluctuation occurs in the electromagnetic coil 83 due to the electromagnetic effect, and the current is collected by the ammeter 85.

Referring to fig. 5, as another preferred embodiment of the present invention, the ammeter 85 is electrically connected to the timer 9 and the processor 10 in sequence.

In the present embodiment, the duration of the current fluctuation collected by the ammeter 85 is recorded by the timer 9, and the data analysis is performed by the processor 10, and the balance is finely adjusted according to the analysis result, and when the duration of the current fluctuation tends to be stable, and the fluctuation time gradually decreases until disappears, the device is proved to be in a balanced state.

Referring to fig. 5, as another preferred embodiment of the present invention, the processor 10 is electrically connected to the display 12.

In the present embodiment, the display 12 is used for displaying the waveform of the current fluctuation duration, so that the user can observe the waveform conveniently for the subsequent fine adjustment of balance.

Referring to fig. 1, as another preferred embodiment of the present invention, two ends of the position-limiting guide rail 61 are provided with position-limiting seats 13.

In the present embodiment, the limit seat 13 is used for mechanically limiting the limit rail 61 and preventing the moving mechanism 6 from exceeding the stroke.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A steam turbine rotor lifting tool comprises a lifting seat (1), lifting ropes (3), hooks (4), a balance mechanism (5), a moving mechanism (6) and a balance detection mechanism (8), and is characterized in that the top of the lifting seat (1) is connected with the hooks (4) through four groups of lifting ropes (3) and is connected with a traveling crane through the hooks (4), the balance mechanism (5) is arranged in the middle of the bottom of the lifting seat (1), the moving mechanisms (6) are arranged on two sides of the lifting seat (1) and are connected with a lower suspension assembly (7) at the bottom through the moving mechanisms (6) at two ends, the lower suspension assembly (7) is connected with a steam turbine rotor, and the balance detection mechanism (8) is further arranged in the length direction of the lifting seat (1);

the balance mechanism (5) comprises a balance block (51), a first transmission gear (52) and a first driving motor (53), the balance block (51) is connected to the inside of a lifting shell (11) of the lifting seat (1) in a sliding mode, transmission teeth are arranged at the bottom of the balance block (51) and are meshed with the first transmission gear (52) through the transmission teeth, the first transmission gear (52) is rotatably connected to a balance box of the balance mechanism (5) to be gathered, a driving shaft of the first transmission gear (52) penetrates through the shell of the balance box to be connected with an output shaft of the first driving motor (53), and the first driving motor (53) is installed on the shell of the balance box;

the moving mechanism (6) comprises a limiting guide rail (61), a moving seat (62), meshing teeth (63), a second transmission gear (64) and a second driving motor (66), the limiting guide rail (61) is arranged on two sides of the bottom of the lifting shell (11) and is in sliding connection with the moving seat (62) through the limiting guide rail (61), the second transmission gear (64) is rotatably connected to the inside of the moving seat (62), the second transmission gear (64) is meshed with the meshing teeth (63) at the bottom of the lifting shell (11), the middle of the second transmission gear (64) is connected with an output shaft of the second driving motor (66) through a transmission shaft (65), and the second driving motor (66) is installed on the shell of the moving seat (62).

2. The steam turbine rotor lifting tool according to claim 1, characterized in that the middle two of the four sets of lifting ropes (3) are in working state to divide the lifting base (1) into three equal parts, and a balance (2) is installed on the lifting ropes, and the two sets of lifting ropes (3) on two sides are in non-working state to connect the edge of the lifting base (1) with the hook (4).

3. The steam turbine rotor lifting tool according to claim 2, characterized in that the balance detection mechanism (8) comprises a balance liquid (81), a magnetic block (82) and a suspension block (84), the balance liquid (81) forms a complete loop in the vertical direction through a balance pipe, the two end faces of the balance liquid (81) are connected with the magnetic block (82) through the suspension block (84), and the magnetic block (82) and the suspension block (84) form sliding contact sealing with the inner wall of the balance pipe.

4. The steam turbine rotor lifting tool according to claim 3, characterized in that the balance detection mechanism (8) further comprises an electromagnetic coil (83) and an ammeter (85), the electromagnetic coil (83) is arranged on the balance pipe on both sides of the lifting base (1), the electromagnetic coils (83) are located at the same horizontal height, and the electromagnetic coils (83) are mounted on the lifting base (1) through the ammeter (85).

5. The turbine rotor lifting tool according to claim 4, wherein the ammeter (85) is in turn electrically connected to the timer (9) and the processor (10).

6. The turbine rotor lifting tool according to claim 5, wherein the processor (10) is in electrical communication with a display (12).

7. The steam turbine rotor lifting tool according to claim 1, characterized in that both ends of the limiting guide rail (61) are provided with limiting seats (13).