CN112744687B

CN112744687B - Turbine rotor lifting tool

Info

Publication number: CN112744687B
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: 2023-07-11
Anticipated expiration: 2040-12-29
Also published as: CN112744687A

Abstract

The invention discloses a lifting tool for a steam turbine rotor, which belongs to the technical field of steam turbine rotors and comprises a lifting seat, lifting ropes, hooks, a balancing 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 crane through the hooks; when the device is used, the journals at two ends of the rotor are respectively hung on the lower suspension assemblies, 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 meanwhile, the balance adjustment direction of the device is judged according to the display data of the hanging scales on the two middle hanging ropes, so that preliminary balance adjustment is carried out through the balance mechanism on the lifting seat, and then the lifting tool meets the lifting condition.

Description

Turbine rotor lifting tool

Technical Field

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

Background

In the manufacturing process of the steam turbine, the rotor of the steam turbine needs to be lifted according to the machining and assembling requirements. The steam turbine rotor is a large-sized workpiece, and a special lifting tool is required to be used so as to ensure the safety of the workpiece and personnel. The lifting tool mainly comprises a cross beam and a pair of hanging frames hung on the cross beam, wherein the slings of the two hanging frames respectively hang the axle journals at two ends of the rotor, the crane hook is hung on the gravity center part of the cross beam, and when the crane is lifted, the cross beam is kept balanced, so that a workpiece is prevented from overturning, the slings are kept vertical, and the blades are prevented from being scratched.

The existing lifting tool is designed according to the actual weight and size of each rotor, the load capacity, the sling span and the like of the existing lifting tool are unchanged, and the existing lifting tool has no universality. The steam turbine has a plurality of models and specifications, and a manufacturer needs to arrange a plurality of lifting tools for standby, so that a large amount of materials are consumed, and the manufacturing cost is increased. Because the steam turbine has long manufacturing cycle and small batch, usually a single order, a plurality of hoisting tools are idle for a long time, occupy tool storehouses, and have high maintenance and preservation cost.

Disclosure of Invention

The invention aims to provide a turbine rotor lifting tool for solving the problems in the background art.

In order to achieve the above purpose, the present invention provides the following technical solutions:

the lifting tool for the steam turbine rotor comprises a lifting seat, lifting ropes, hooks, a balancing 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 crane through the hooks;

the balance mechanism comprises a balance weight, a first transmission gear and a first driving motor, the balance weight is connected in the lifting shell of the lifting seat in a sliding manner, the bottom of the balance weight is provided with transmission teeth and is meshed with the first transmission gear through the transmission teeth, the first transmission gear is connected to the inner side of a balance box of the balance mechanism in a rotating manner, a driving shaft of the first transmission gear penetrates through the balance box shell to be connected with an output shaft of the first driving motor, and the first driving motor is arranged on the shell of the balance box;

the movable mechanism comprises a limiting guide rail, a movable seat, meshing teeth, a second transmission gear and a second driving motor, wherein the limiting guide rail is arranged on two sides of the bottom of the lifting shell and is in sliding connection with the movable seat through the limiting guide rail, the second transmission gear is connected with the movable seat in a rotating mode, the second transmission gear is meshed with the meshing teeth on the bottom of the lifting shell, the middle portion 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 movable seat.

As a further scheme of the invention: the middle two groups of the four groups of lifting ropes are in a working state 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 two sides are in a non-working state to connect the edge of the lifting seat with the hook.

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

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

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

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

As still further aspects 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 the shaft necks at the 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 most rotors with different sizes, manufacturers are prevented from needing to arrange a plurality of sets of lifting tools for standby according to the rotors, a large amount of materials are consumed, and the manufacturing cost is increased; after the rotor is hung, slowly hoisting the hoisting seat below by the hoisting hooks on the top, and judging the balance adjustment direction of the device according to the display data of the hoisting scales on the two hoisting ropes in the middle, so that preliminary balance adjustment is carried out by 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 the balance detection mechanism, and carries out the subsequent fine adjustment of the balance condition of the lifting seat according to the electromagnetic effect.

Drawings

FIG. 1 is a schematic diagram of a combined structure of a turbine rotor lifting tool.

FIG. 2 is a schematic structural view of a balancing mechanism in a turbine rotor lifting tool.

Fig. 3 is a schematic structural view of a moving mechanism in a turbine rotor lifting tool.

Fig. 4 is a schematic structural view of a balance detecting mechanism in a turbine rotor lifting tool.

FIG. 5 is a schematic diagram of the connection structure of the balance detection mechanism in the turbine rotor lifting tool.

In the figure: 1-lifting seat, 2-lifting balance, 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 tooth, 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 following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that, if there is a directional indication (such as up, down, left, right, front, rear.

Furthermore, if the description of "first," "second," etc. is referred to in this disclosure, it is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

Referring to fig. 1 to 3, in the embodiment of the present invention, a turbine rotor lifting tool includes a lifting seat 1, lifting ropes 3, a hook 4, a balancing mechanism 5, a moving mechanism 6 and a balancing detection mechanism 8, wherein the top of the lifting seat 1 is connected with the hook 4 through four groups of lifting ropes 3 and is connected with a crane through the hook 4, the balancing mechanism 5 is arranged in the middle of the bottom of the lifting seat 1, the moving mechanisms 6 are arranged at 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 the turbine rotor, and the balancing detection mechanism 8 is also arranged in the length direction of the lifting seat 1;

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

the moving mechanism 6 comprises a limit guide rail 61, a moving seat 62, meshing teeth 63, a second transmission gear 64 and a second driving motor 66, wherein the limit 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 limit 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 on the bottom of the lifting shell 11, the middle part 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 the 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 most rotors with different sizes, manufacturers are prevented from needing to arrange a plurality of sets of lifting tools for standby according to the rotors, a large amount of materials are consumed, and the manufacturing cost is increased; after the rotor is hung, the lifting seat 1 below is slowly lifted by the row hanging hooks 4 at the top, and meanwhile, the balance adjustment direction of the device is judged according to the display data of the hanging scales 2 on the two middle hanging ropes 3, so that preliminary balance adjustment is carried out by the balance mechanism 5 on the lifting seat 1, and further, the lifting tool meets the lifting condition.

The specific moving mechanism 6 adjustment process is, the bottom of lifting by crane the shell 11 is equipped with the meshing tooth 63 to install second drive gear 64 through meshing tooth 63 cooperation, this device drives second drive gear 64 through second driving motor 66 and carries out rotary motion, thereby the cooperation of second drive gear 64 and meshing tooth 63 converts rotary motion into the rectilinear motion of second drive gear 64 in meshing tooth 63 straight line direction, in this process, moving mechanism 6 forms sliding connection through moving seat 62 and lifting by crane the spacing guide 61 of seat 1, and then accomplish the straight line position adjustment to moving mechanism 6, make the device can satisfy the steam turbine rotor's of different size length lifts by crane.

The specific balance adjustment process is that a balance box at the bottom of the balance mechanism 5 is fixedly arranged on the bottom surface of the middle part 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 and the balance weight 51 are meshed with each other, so that the rotary motion of the first transmission gear 52 can drive the balance weight 51 to perform linear sliding in the lifting seat 1, and further the weight of a rotor in the lifting process is balanced.

Referring to fig. 1, as a preferred embodiment of the present invention, two middle groups of four groups of lifting ropes 3 are in an operating state to divide the lifting seat 1 into three parts, and a lifting scale 2 is mounted thereon, and two groups of lifting ropes 3 on two sides are in an inactive state to connect the edge of the lifting seat 1 with the hook 4.

In this embodiment, the hanging scale 2 is used for performing preliminary measurement on the weight of two sides of the rotor in the lifting process, so that the lifting seat 1 can be lifted safely; the two groups of lifting ropes 3 on the two sides are used for carrying out safety protection on the lifting seat 1, and the two lifting ropes 3 in the middle of the lifting process are prevented from being broken.

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, wherein the balance liquid 81 forms a complete loop in a vertical direction through a balance pipe, two end surfaces 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 a sliding contact seal with an inner wall of the balance pipe.

In this embodiment, during the lifting process, since the weights at two sides cannot reach absolute balance, at this time, the two end faces of the balancing solution 81 inside the balance detection mechanism 8 shake up and down, so that the suspension block 84 at the top of the balancing solution 81 drives 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, wherein the electromagnetic coil 83 is disposed on the balance tube at two sides of the lifting seat 1, and the electromagnetic coil 83 is located at the same level, and the electromagnetic coil 83 is mounted on the lifting seat 1 through the ammeter 85.

In this embodiment, the magnet 82 cuts the electromagnetic coil 83 up and down, and due to the electromagnetic effect, corresponding current fluctuation occurs in the electromagnetic coil 83 and 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 this embodiment, the duration of the current fluctuation collected by the ammeter 85 is recorded by the timer 9, and is analyzed by the processor 10, and the balance condition is finely adjusted according to the analysis result, and when the duration of the current fluctuation is smooth and the fluctuation time is gradually reduced until the fluctuation disappears, the device is proved to be in a balance state.

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

In this embodiment, the display 12 is used to display the waveform of the duration of the current fluctuation, so that the user can observe the waveform conveniently and perform the subsequent balance fine adjustment.

Referring to fig. 1, as another preferred embodiment of the present invention, the limiting seats 13 are disposed at two ends of the limiting rail 61.

In this embodiment, the limiting seat 13 is used for mechanically limiting the limiting rail 61 to prevent 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 characteristics 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 disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims

1. The utility model provides a steam turbine rotor lifting tool, includes lifting seat (1), lifting rope (3), couple (4), balancing mechanism (5), shifter (6) and balance detection mechanism (8), its characterized in that, the top of lifting seat (1) links to each other with couple (4) through four sets of lifting rope (3) to link to each other with the line through couple (4), be equipped with shifter (5) in the middle of the bottom of lifting seat (1), the both sides of lifting seat (1) are equipped with shifter (6), and link to each other with lower suspension assembly (7) of bottom through shifter (6) at both ends, lower suspension assembly (7) link to each other with the steam turbine rotor, the length direction of lifting seat (1) still is equipped with balance detection mechanism (8);

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 inside 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 connected inside a balance box of the balance mechanism (5) in a rotating mode, 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), wherein the limiting guide rail (61) is arranged on two sides of the bottom of the lifting shell (11), the limiting guide rail (61) is in sliding connection with the moving seat (62), 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) on the bottom of the lifting shell (11), the middle part 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 arranged on the shell of the moving seat (62);

balance detection mechanism (8) are including balanced liquid (81), magnetic path (82) and suspension piece (84), balanced liquid (81) form a complete return circuit in vertical direction through the balance pipe, link to each other with magnetic path (82) through suspension piece (84) on the both ends face of balanced liquid (81), magnetic path (82) and suspension piece (84) form sliding contact seal with the inner wall of balance pipe.

2. The turbine rotor hoisting tool according to claim 1, wherein the middle two groups of the four groups of hoisting ropes (3) are in an operating state to divide the hoisting base (1) into three parts, and a hoisting scale (2) is arranged on the hoisting base, and the two groups of hoisting ropes (3) on two sides are in an inactive state to connect the edge of the hoisting base (1) with the hook (4).

3. The turbine rotor lifting tool according to claim 2, wherein the balance detection mechanism (8) further comprises an electromagnetic coil (83) and an ammeter (85), the electromagnetic coil (83) is arranged on balance pipes on two sides of the lifting seat (1), the electromagnetic coils (83) are located at the same horizontal level, and the electromagnetic coils (83) are installed on the lifting seat (1) through the ammeter (85).

4. A turbine rotor hoisting tool according to claim 3, characterized in that the ammeter (85) is in turn electrically connected to the timer (9) and the processor (10).

5. The steam turbine rotor lifting tool as recited in claim 4, wherein the processor (10) is in electrical communication with a display (12).

6. The turbine rotor lifting tool according to claim 1, wherein limiting seats (13) are arranged at two ends of the limiting guide rail (61).