CN113968537A - Generator rotor lifting and leveling method and generator rotor drawing-through method - Google Patents

Abstract

The invention relates to a generator rotor lifting and leveling method and a generator rotor drawing-through method. The generator rotor lifting and leveling method comprises the following steps: arranging the hanging strip assembly in the gravity center area of the supported rotor, wherein the hanging strip assembly is provided with a first force application point and a second force application point which are respectively positioned at two sides of the gravity center for the rotor, so that the axial distance between the first force application point and the gravity center is larger than that between the second force application point and the gravity center; arranging an auxiliary belt in a first area on the rotor, wherein the first area is positioned on one side, far away from the center of gravity, of a second force application point on the rotor; hoisting the rotor to a preset position through the hoisting belt assembly; the first region of the rotor is lifted by the auxiliary belt until the rotor is horizontal. When the rotor is hoisted by the hanging strip assembly, the torque received by one end, close to the first force application point, of the rotor is large, the rotor can be lifted upwards firstly, the first area of the rotor is lifted up through the auxiliary belt until the rotor is in a horizontal state, so that the rotor is quickly leveled, and the risk of collision between the rotor and the stator is reduced.

Description

Generator rotor lifting and leveling method and generator rotor drawing-through method

Technical Field

The invention relates to the technical field of electrical maintenance, in particular to a generator rotor lifting and leveling method and a generator rotor drawing-through method.

Background

The power plant generator is generally a large horizontal generator, and workers need to extract the rotor from the stator periodically to detect the use condition of the rotor. The rotor is in by the lifting in-process, generally carries out the lifting through the lifting rope, however the lifting rope is in the upwards lifting tightening process, can appear small displacement in the rotor axial to lead to lifting back rotor to appear not level. Because the clearance between rotor and the stator is less, then the rotor is taken out the in-process of wearing in the stator, if the rotor is not in horizontal position, then collide with the stator easily to lead to huge loss, consequently the driving needs to hoist repeatedly and put down the rotor, is in the horizontality after the rotor is hoisted, and whole process is wasted time and energy, and has higher risk.

Disclosure of Invention

Based on this, it is necessary to provide a generator rotor lifting and leveling method aiming at the technical problems that the rotor is not in a horizontal position after being lifted, the lifting and the lowering of the rotor are required to be repeated, the process is time-consuming and labor-consuming, and the risk is high.

A generator rotor lifting leveling method comprises the following steps:

s100, arranging a hanging strip assembly in a gravity center area of a supported rotor, wherein the hanging strip assembly has a first force application point and a second force application point for the rotor, and the first force application point and the second force application point are respectively positioned at two sides of the gravity center along the axial direction of the rotor, so that the axial distance between the first force application point and the gravity center is larger than the axial distance between the second force application point and the gravity center;

s200, arranging an auxiliary belt in a first area on the rotor, wherein the first area is positioned on one side, away from the gravity center, of the second force application point on the rotor;

s300, lifting the rotor upwards to a preset position through the hanging strip assembly;

s400, lifting the first area of the rotor upwards through the auxiliary belt until the rotor is in a horizontal state;

wherein, the sequence of S100 and S200 can be exchanged.

In one embodiment, S200, the auxiliary band is disposed at an end of the rotor away from the first force application point.

In one embodiment, a level gauge is provided on the rotor, and the position state of the rotor is detected by the level gauge.

In one embodiment, in S400, if the rotor is lifted to the position where the first area is higher than the center of gravity, the first area is lowered through the auxiliary belt until the rotor is in a horizontal state.

In one embodiment, in S400, the chain block drives the auxiliary belt to lift or lower the first region of the rotor upward.

The invention also provides a generator rotor drawing-through method which can solve at least one technical problem.

A generator rotor drawing-through method is used in the process of horizontally lifting a rotor to be close to or far away from a stator.

In one embodiment, in S300, the preset position is a central region of the stator in the radial direction.

In one embodiment, a moving part is provided, and the sling assembly and the auxiliary belt are driven by the moving part to synchronously approach or separate from the stator.

In one embodiment, when the rotor is extracted from the stator, S100 further includes:

s110, a sliding block is placed on the end part, close to the first force application point, of the stator;

s120, enabling one end of the rotor to be supported by the sliding block, and hoisting the other end of the rotor to be in a horizontal state by a hoisting rope;

s130, arranging a traction assembly at the end part, close to the second force application point, of the rotor, and pulling the rotor to move along a first direction through the traction assembly until the sliding block and the rotor synchronously move until the sliding block reaches the end part of the stator, wherein the first direction is a direction in which the first force application point points to the second force application point;

s140, arranging a bracket at the end part of the rotor close to the second force application point, supporting the rotor through the sliding block and the bracket, and removing the traction assembly and the lifting rope.

In one embodiment, when the rotor penetrates into the stator, S400 is followed by:

s410, placing the stator at one side of the rotor along a second direction, wherein the second direction is a direction in which the second force application point points to the first force application point;

s420, placing a sliding block at the end part of the stator close to the first force application point;

s430, the rotor is driven to move along the second direction through the hanging strip assembly and the auxiliary belt until one end, close to the first force application point, of the rotor extends into the stator and is supported by the sliding block;

s440, hoisting one end of the rotor close to the second force application point by using a hoisting rope, enabling the rotor to be in a horizontal state under the supporting of the sliding block and the hoisting action of the hoisting rope, and detaching the hoisting belt assembly and the auxiliary belt;

s450, a traction assembly is arranged at the end part, close to the first force application point, of the rotor, and the rotor is pulled to move along the second direction through the traction assembly until the sliding block and the rotor synchronously move until the rotor is installed in place.

Has the advantages that:

the embodiment of the invention provides a method for lifting and leveling a generator rotor, which comprises the following steps:

s100, arranging the sling component in the gravity center area of the supported rotor, wherein the sling component has a first force application point and a second force application point for the rotor, and the first force application point and the second force application point are respectively positioned at two sides of the gravity center along the axial direction of the rotor, so that the axial distance between the first force application point and the gravity center is larger than the axial distance between the second force application point and the gravity center;

s200, arranging an auxiliary belt in a first area on the rotor, wherein the first area is positioned on one side, far away from the gravity center, of a second force application point on the rotor;

s300, lifting the rotor upwards to a preset position through the hanging strip assembly;

s400, lifting the first area of the rotor upwards through the auxiliary belt until the rotor is in a horizontal state;

wherein, the sequence of S100 and S200 can be exchanged.

First application of force point is greater than second application of force point and centrobaric axial interval in this application, then the suspender subassembly upwards lifts up the rotor, the torque that the one end that the rotor is close to first application of force point received is greater than the one end that the rotor is close to second application of force point, then the one end that the rotor is close to first application of force point can upwards lift earlier, then through the first region of supplementary area pulling rotor, make the first region of rotor upwards lift, until the rotor is in the horizontality, thereby make the rotor level fast, and then reduce because of the rotor is not in horizontal position and the risk of colliding with the stator, whole operation process is succinct, high efficiency.

The embodiment of the invention also provides a generator rotor drawing-through method, which is used for horizontally lifting the rotor and enabling the rotor to be close to or far away from the stator. The method can solve at least one technical problem.

Drawings

FIG. 1 is a flow chart of a method for leveling a generator rotor during lifting according to the present invention;

FIG. 2 is a process diagram of adjusting the rotor level in the generator rotor lifting leveling method provided by the invention;

FIG. 3 is a stress analysis diagram of the generator rotor at the time of rotor level in the lifting and leveling method;

FIG. 4 is a process diagram of extracting the rotor from the stator in the generator rotor extraction method provided by the present invention;

FIG. 5 is a flow chart of the method for extracting a rotor from a stator of a generator according to the present invention;

fig. 6 is a flow chart of the method for penetrating the rotor into the stator of the generator provided by the invention.

Reference numerals: 100-a rotor; 120-a first end; 130-a second end; 140-a first point of application; 150-a second point of application; 200-a stator; 300-a harness assembly; 310-a first lifting rope; 320-a second lifting rope; 330-auxiliary band; 331-chain block; 332-a force gauge; 340-a moving part; 410-a lifting rope; 420-a slide block; 430-a pulling assembly.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are 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 the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1 and fig. 2, fig. 1 is a flowchart of a method for leveling a generator rotor in a lifting manner according to the present invention;

FIG. 2 is a process diagram for adjusting the rotor level in the method for leveling the generator rotor by lifting. According to the lifting and leveling method for the generator rotor 100 provided by the embodiment of the invention, when the rotor 100 is drawn out or penetrates into the inner cavity of the stator 200, because the wall gap between the rotor 100 and the inner cavity of the stator 200 is small, in order to avoid the loss caused by collision between the rotor 100 and the inner cavity of the stator 200, the rotor 100 needs to be ensured to be in a horizontal state when being lifted, and then when the rotor 100 in the horizontal state is drawn out or penetrates into the inner cavity of the stator 200, the risk of collision between the rotor 100 and the inner cavity of the stator 200 can be reduced.

The method for lifting and leveling the generator rotor 100 comprises the following steps:

s100, the sling assembly 300 is disposed in the gravity center area of the supported rotor 100, the sling assembly 300 has a first force application point 140 and a second force application point 150 for the rotor 100, and the first force application point 140 and the second force application point 150 are respectively located at two sides of the gravity center along the axial direction of the rotor 100, so that the axial distance between the first force application point 140 and the gravity center is greater than the axial distance between the second force application point 150 and the gravity center.

Specifically, the strap assembly 300 includes a first strap 310 and a second strap 320, the first strap 310 acting at the first point of application 140 and the second strap 320 acting at the second point of application 150. Since the difference between the axial distance d1 between the first force application point 140 and the center of gravity and the axial distance d2 between the second force application point 150 and the center of gravity is small, when the rotor 100 is hoisted by the crane by the first hoisting rope 310 and the second hoisting rope 320, the vertical force components of the first force application point 140 and the second force application point 150 of the rotor 100 by the first hoisting rope 310 and the second hoisting rope 320 are substantially the same, approximately half of the gravity of the rotor 100. Since the axial distance d1 between the first force application point 140 and the center of gravity is greater than the axial distance d2 between the second force application point 150 and the center of gravity, the upward torque applied to the first end 120 of the rotor 100 is greater than the upward torque applied to the second end 130 of the rotor 100, and therefore the first end 120 of the rotor 100 is lifted upward first. The first end 120 of the rotor 100 is an end of the rotor 100 close to the first force application point 140, and the second end 130 of the rotor 100 is an end of the rotor 100 close to the second force application point 150.

S200 sets the auxiliary band 330 to a first region on the rotor 100, the first region being located on a side of the second force application point 150 on the rotor 100 away from the center of gravity.

Specifically, the auxiliary band 330 is applied to the first region of the rotor 100, and the first region of the rotor 100 is lifted up or lowered down by adjusting the pulling force of the auxiliary band 330 on the first region of the rotor 100. Specifically, in the view shown in fig. 2, the first region is a region between the right end of the rotor 100 and the second force application point 150.

S300 lifts the rotor 100 up to a preset position by the harness assembly 300.

Specifically, the first and second lifting cords 310 and 320 are tightened, thereby lifting the rotor 100. Since the first end 120 of the rotor 100 is hoisted first, the first and second hoist ropes 310 and 320 stop being tightened when the first end 120 of the rotor 100 is hoisted upward to a preset position.

S400 lifts the first region of the rotor 100 upward by the auxiliary belt 330 until the rotor 100 is in a horizontal state.

Specifically, since the first end 120 of the rotor 100 moves upward first, and when the preset position is reached, the height of the first end 120 is greater than that of the second end 130, that is, the axis of the rotor 100 is inclined with respect to the horizontal plane, the first region of the rotor 100 is lifted upward by the auxiliary belt 330, so that the inclination degree of the axis of the rotor 100 is changed, and the first end 120 of the rotor 100 is flush with the second end 130, that is, the rotor 100 is in the horizontal plane.

When the rotor 100 is lifted upwards by the lifting belt assembly 300 in the application, one end of the rotor 100 close to the first force application point 140 is lifted upwards firstly, and then the first area of the rotor 100 is pulled by the auxiliary belt 330, so that the first area of the rotor 100 is lifted upwards until the rotor 100 is in a horizontal state, the rotor 100 is made to be horizontal fast, the risk of collision between the rotor 100 and the stator 200 due to the fact that the rotor 100 is not in the horizontal position is reduced, and the whole operation process is simple and efficient.

In other embodiments, the order of S100 and S200 is reversed. Since the sequence of S100 and S200 does not affect the implementation of the present solution, the implementation process of this embodiment is the same as that of the above embodiment, and therefore, the description is omitted.

Referring to fig. 1 and 2, in one embodiment, in S200, an auxiliary band 330 is disposed on an end of the rotor 100 away from the first force application point 140.

Specifically, the auxiliary belt 330 is sleeved at the journal of the second end 130 of the rotor 100, and when the auxiliary belt 330 pulls the rotor 100, the auxiliary belt 330 can be limited at the journal of the rotor 100, so as to prevent the auxiliary belt 330 from sliding along the axial direction and falling off from the rotor 100.

Further, when the rotor 100 is drawn out or penetrated into the inner cavity of the stator 200, the second end 130 of the rotor 100 is always positioned outside the inner cavity of the stator 200, so that the interference of the auxiliary band 330 with the stator 200 can be avoided.

Referring to fig. 2, in one embodiment, a level gauge is provided on the rotor 100, and the position state of the rotor 100 is detected by the level gauge.

Specifically, when the rotor 100 is lifted up and the second end 130 of the rotor 100 is lifted up by the auxiliary band 330, the position state of the rotor 100 is detected by the level gauge until the level gauge detects that the rotor 100 is horizontal, the adjustment of the second end 130 of the rotor 100 by the auxiliary band 330 is stopped, and the tension of the auxiliary band 330 on the second end 130 of the rotor 100 is maintained, so that the rotor 100 is kept horizontal.

Continuing to refer to fig. 2, in one embodiment, if the rotor 100 is raised above the center of gravity, the first area is lowered through the auxiliary band 330 until the rotor 100 is horizontal in S400.

Specifically, when the rotor 100 is lifted to a position where the first region is higher than the center of gravity, that is, the first region of the rotor 100 is tilted upward, if the rotor 100 needs to be maintained in a horizontal position, the pulling force on the first region needs to be adjusted by the auxiliary belt 330, so that the first region of the rotor 100 is rotated downward by a certain angle, and thus the rotor 100 is maintained in a horizontal position. If the first area of the rotor 100 is rotated downward by an excessively large angle, the first area of the rotor 100 may be lifted upward again by the auxiliary belt 330, and the reverse direction may be performed until the rotor 100 is maintained in the horizontal position. Compared with the traditional rotor 100 lifting and leveling method, the scheme does not need to lift and put down the whole rotor 100 repeatedly, only needs to keep the rotor 100 in a lifting state, and then adjusts the tension of the auxiliary belt 330 on the first area of the rotor 100 for multiple times, so that the first area of the rotor 100 is upward or downward until the rotor 100 is horizontal, and the whole operation process is simple and efficient.

Referring to fig. 2, in one embodiment, in S400, the chain block 331 drives the auxiliary belt 330 to lift or lower the first region of the rotor 100 upward.

Specifically, the output end of the chain block 331 is connected to the auxiliary belt 330, and the length of the chain block 331 can be changed by pulling the chain block 331, so that the pulling force of the auxiliary belt 330 on the second end 130 of the rotor 100 is changed, and the second end 130 of the rotor 100 can be lifted or lowered. The chain block 331 has high strength and can bear the pulling force of the rotor 100, and meanwhile, the length of the chain block 331 can be adjusted only by small manual pulling force, so that the rotor 100 can be adjusted to be in a horizontal position conveniently. The operation principle of the chain block 331 is the prior art, and therefore is not described in detail.

Referring to fig. 3, fig. 3 is a stress analysis diagram of the generator rotor in the lifting and leveling method of the invention when the rotor is horizontal. When the rotor 100 is in the horizontal position, the torque experienced at both ends of the rotor 100 is equal. When the distance between the output end of the traveling crane and the center of gravity of the rotor 100 in the vertical direction is H, the axial distance between the second end 130 of the rotor 100 and the center of gravity is d3, wherein the gravity of the rotor 100 is G, the component force of the auxiliary belt 330 to the second end 130 of the rotor 100 in the vertical direction is F, and the distance between the output end of the moving member 340 and the center of gravity of the rotor 100 in the vertical direction is much larger than d1 and d2, the component force of the first lifting rope 310 to the first force application point 140 in the vertical direction is approximately 0.5G, and the component force of the pulling force of the second lifting rope 320 to the second force application point 150 in the vertical direction is approximately 0.5G, then the following equations can be approximated:

0.5Gd1＝0.5Gd2+Fd3

F＝0.5G(d1-d2)/d3

that is, when the component force of the auxiliary belt 330 to the second end 130 of the rotor 100 in the vertical direction is 0.5G (d1-d2)/d3, the level of the rotor 100 can be satisfied. By pulling the chain block 331, the pulling force of the auxiliary belt 330 on the second end 130 of the rotor 100 can be adjusted, so that the rotor 100 is in a horizontal state, and the phenomenon that the rotor 100 is repeatedly lifted and put down due to the fact that the rotor 100 is not flat after being lifted is avoided, and the whole process is simple and efficient.

In other embodiments, the auxiliary band 330 is coupled to a tractor, and the auxiliary band 330 is tightened and released by the tractor, thereby changing the tension of the auxiliary band 330 on the second end 130 of the rotor 100 in S400.

Referring to fig. 2, in one embodiment, a load cell 332 is provided on the auxiliary belt 330, and the tension on the auxiliary belt 330 is detected by the load cell 332.

Specifically, in the process of pulling the chain block 331, the length of the chain block 331 changes, so that the pulling force of the chain block 331 and the auxiliary belt 330 on the second end 130 of the rotor 100 changes, and the pulling force of the chain block 331 and the auxiliary belt 330 on the second end 130 of the rotor 100, that is, the bearing force of the chain block 331 and the auxiliary belt 330 is measured by the force gauge 332, so that the pulling force can be prevented from exceeding the maximum bearing force of the chain block 331 or the auxiliary belt 330.

Referring to fig. 1, 2 and 4, fig. 4 is a process diagram of extracting the rotor from the stator in the generator rotor extraction method provided by the present invention. In the method for drawing through the generator rotor 100 provided by an embodiment of the invention, the generator rotor 100 is lifted and leveled in the process of horizontally lifting the rotor 100 and enabling the rotor 100 to be close to or far away from the stator 200.

Specifically, when the rotor 100 is drawn out or penetrated into the inner cavity of the stator 200, since the wall gap between the rotor 100 and the inner cavity of the stator 200 is small, in order to avoid the loss caused by collision between the rotor 100 and the inner cavity of the stator 200, the rotor 100 needs to be in a horizontal state after being lifted, and then when the rotor 100 in the horizontal state is drawn out or penetrated into the inner cavity of the stator 200, the risk of collision between the rotor 100 and the inner cavity of the stator 200 can be reduced.

Referring to fig. 2 and 4, in one embodiment, the predetermined position is a radial center region of the stator 200 in S300.

Specifically, since the first end 120 of the rotor 100 moves upward first when the rotor 100 is lifted, the travelling crane is turned off when the first end 120 of the rotor 100 moves upward to the radial center area of the stator 200, and when the second end 130 of the rotor 100 is lifted to the horizontal position of the rotor 100, the radial center areas of the rotor 100 and the stator 200 are overlapped, so that the gaps between the rotor 100 and the stator 200 are substantially equal in each area in the circumferential direction, so as to avoid the gaps from being inconsistent, and the gaps in some areas are too small to facilitate the rotor 100 to collide with the inner cavity of the stator 200 during the movement.

Referring to fig. 2 and 3, in one embodiment, a moving member 340 is provided, and the strap assembly 300 is moved by the moving member 340 to move closer to or away from the stator 200 in synchronization with the auxiliary belt 330.

Specifically, the output end of the moving member 340 coincides with the center of gravity of the rotor 100 in the vertical direction, the moving member 340 may be a traveling crane, the first lifting rope 310, the second lifting rope 320 and the auxiliary belt 330 are all connected to the output end of the traveling crane, and when the traveling crane is axially close to or far from the stator 200, the first lifting rope 310, the second lifting rope 320 and the auxiliary belt 330 can synchronously move, so that the magnitude of the force applied to the rotor 100 can be ensured to be unchanged, and the rotor 100 is always in a state close to the horizontal.

Referring to fig. 5, fig. 5 is a flow chart of the rotor-stator extraction in the generator rotor extraction method according to the present invention. In one embodiment, when the rotor 100 is drawn out of the stator 200, S100 further includes:

s110 places the slider 420 on the stator 200 near the end of the first force application point 140.

Specifically, the upper end covers and the upper tiles on the two sides of the generator are removed, the lower end covers and the lower tiles are replaced by the supports, the two ends of the rotor 100 are supported by the supports, then the first end 120 and the second end 130 of the rotor 100 extending out of the stator 200 are respectively lifted by two lifting ropes 410, the rotor 100 is adjusted to be horizontal, and the supports on the two sides of the generator are detached after the gaps on the periphery are uniform. Wherein the second end 130 of the rotor 100 is slightly lifted by the lifting rope 410, the slider 420 is put into the gap between the second end 130 of the rotor 100 and the inner cavity of the stator 200, and the slider 420 is pushed into the side of the stator 200 close to the first end 120 in the second direction. Wherein the rotor 100 is hoisted by tightening the hoist rope 410 by a crane or the like.

S120 causes one end of the rotor 100 to be supported by the slider 420 and the other end to be lifted by the lifting rope 410 until the rotor 100 is in a horizontal state.

Specifically, the lifting rope 410 at the end of the rotor 100 close to the first force application point 140 is removed, the first end 120 of the rotor 100 is supported by the sliding block 420, the rotor 100 is horizontally supported by adjusting the pulling force of the lifting rope 410 on the second end 130 of the rotor 100, and the gap between the rotor 100 and the inner cavity of the stator 200 is uniform.

S130, a pulling assembly 430 is disposed on the end of the rotor 100 close to the second force application point 150, and the rotor 100 is pulled by the pulling assembly 430 to move in a first direction until the slider 420 and the rotor 100 move synchronously until the slider 420 reaches the end of the stator 200, wherein the first direction is a direction in which the first force application point 140 of the rotor 100 points to the second force application point 150.

Specifically, when the traction assembly 430 pulls the rotor 100 to move slowly along the first direction, the lifting rope 410 connected to the second end 130 of the rotor 100 moves synchronously with the traction assembly 430, and since the guard ring of the first end 120 of the rotor 100 abuts against the side wall of the sliding block 420 close to the first end 120 of the rotor 100, the sliding block 420 moves synchronously with the rotor 100 along the first direction, and the rotor 100 can be stably supported by the sliding block 420 and the lifting rope 410 during the movement, so that the risk of collision between the rotor 100 and the inner cavity of the stator 200 is reduced. Wherein, one side of the slider 420 contacting the stator 200 is coated with paraffin so that the friction between the slider 420 and the stator 200 can be reduced, so that the slider 420 can move synchronously with the rotor 100.

Further, the pulling assembly 430 includes a pulling device and a pulling rope, the pulling rope is sleeved at the journal of the second end 130 of the rotor 100, and when the pulling rope pulls the rotor 100 along the first direction, the pulling rope can be limited at the journal of the second end 130 of the rotor 100, so that the pulling rope is stably sleeved on the rotor 100.

S140 sets a bracket on the rotor 100 at an end near the second force application point 150, supports the rotor 100 through the slider 420 and the bracket, and removes the traction assembly 430 and the hoist rope 410.

Specifically, when the sliding block 420 moves to the end of the stator 200 close to the second end 130 of the rotor 100, the sliding block 420 cannot slide in the stator 200 continuously, and the rotor 100 is drawn out by a length equal to or more than half of the total length of the rotor 100, the pulling assembly 430 is removed, a bracket is arranged at the second end 130 of the rotor 100, then the lifting rope 410 arranged at the second end 130 of the rotor 100 is removed, the second end 130 of the rotor 100 is supported by the bracket, and the rotor 100 is horizontally supported by the sliding block 420 and the bracket.

Referring to fig. 2 and 4, in one embodiment, when the rotor 100 is drawn out of the stator 200, S400 further includes:

the rotor 100 is drawn out of the inner cavity of the stator 200 by moving the moving member 340 to move the strap assembly 300 and the auxiliary band 330 away from the stator 200.

Referring to fig. 6, fig. 6 is a flow chart of rotor penetration into stator in the generator rotor penetration method provided by the present invention. In one embodiment, when the rotor 100 penetrates the stator 200, the step S400 further includes:

s410 positions the stator 200 at one side of the rotor 100 along a second direction, wherein the second direction is a direction in which the second force application point 150 of the rotor 100 points to the first force application point 140.

Specifically, the stator 200 is disposed at one side of the rotor 100 along the second direction, that is, the stator 200 is disposed at one side of the first end 120 of the rotor 100, so that when the moving assembly drives the strap assembly 300 and the auxiliary belt 330 to approach the stator 200, the first end 120 of the rotor 100 can extend into the inner cavity of the stator 200, and thus the auxiliary belt 330 can be prevented from interfering with the extension of one end of the rotor 100 into the inner cavity of the stator 200.

S420 places the slider 420 on the stator 200 near the end of the first force application point 140.

S430 drives the rotor 100 to move in the second direction through the hanging strip assembly 300 and the auxiliary belt 330 until one end of the rotor 100 near the first force application point 140 extends into the stator 200 and is supported by the sliding block 420.

Specifically, the moving member 340 moves the strap assembly 300 and the auxiliary strap 330 to one end in the second direction, so that the first end 120 of the rotor 100 can be inserted into the stator 200. Since the stator 200 places the slider 420 near one end of the rotor 100, the first end 120 of the rotor 100 can be located above the slider 420 and supported by the slider 420.

S440, the end of the rotor 100 near the second force application point 150 is lifted by the lifting rope 410, the rotor 100 is in a horizontal state under the support of the slider 420 and the lifting action of the lifting rope 410, and the hanging strip assembly 300 and the auxiliary belt 330 are removed.

Specifically, the hanging rope 410 is sleeved at the journal of the second end 130 of the rotor 100, and then the hanging rope 410 is tightened by a crane or the like, so that the height of the hanging rope 410 for hanging the second end 130 of the rotor 100 is adjusted, the rotor 100 is horizontally supported by the hanging rope 410 and the slider 420, and the gap between the rotor 100 and the inner cavity of the stator 200 is uniform, so that when the rotor 100 penetrates into the stator 200, the risk of collision with the inner cavity of the stator 200 can be reduced.

Wherein, since the rotor 100 is horizontally supported by the slider 420 and the lifting rope 410, the hanging strip assembly 300 and the auxiliary belt 330 are removed, and the hanging strip assembly 300 and the auxiliary belt 330 are prevented from interfering with the stator 200 during the process that the rotor 100 moves into the stator 200.

S450, a pulling assembly 430 is disposed at an end of the rotor 100 near the first force application point 140, and the rotor 100 is pulled by the pulling assembly 430 to move in the second direction until the sliding block 420 moves synchronously with the rotor 100 until the rotor 100 is installed in place.

Specifically, as the pulling assembly 430 pulls the rotor 100 to move slowly in the first direction, the lifting rope 410 coupled to the second end 130 of the rotor 100 moves in synchronization with the pulling assembly 430. The side of the slider 420 contacting the stator 200 is coated with paraffin, so that friction between the slider 420 and the stator 200 can be reduced, the slider 420 can move synchronously with the rotor 100, and the rotor 100 can be stably supported by the slider 420 and the lifting rope 410 in the moving process until the rotor 100 is installed in place.

Referring to fig. 4, in one embodiment, after S450, the method further includes:

lifting the first end 120 of the rotor 100 with the lifting rope 410, and taking out the slider 420;

brackets are provided at both ends of the rotor 100, and the suspension ropes 410 and the traction assembly 430 at both ends of the rotor 100 are removed, and both ends of the rotor 100 are supported by the brackets.

The present application raises or lowers the first region of the rotor 100 up or down a plurality of times by the auxiliary belt 330 so that the rotor 100 is maintained in a horizontal position. Compared with the traditional rotor 100 lifting and leveling method, the scheme does not need to lift and lower the whole rotor 100 repeatedly, reduces the risk of collision with the stator 200 in the process of moving away from and approaching the stator 200 relative to the stator 200 because the rotor 100 is not in a horizontal position, and has simple and efficient whole operation process.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A generator rotor lifting and leveling method is characterized by comprising the following steps:

s100, arranging a hanging strip assembly in a gravity center area of a supported rotor, wherein the hanging strip assembly has a first force application point and a second force application point for the rotor, and the first force application point and the second force application point are respectively positioned at two sides of the gravity center along the axial direction of the rotor, so that the axial distance between the first force application point and the gravity center is larger than the axial distance between the second force application point and the gravity center;

s200, arranging an auxiliary belt in a first area on the rotor, wherein the first area is positioned on one side, away from the gravity center, of the second force application point on the rotor;

s300, lifting the rotor upwards to a preset position through the hanging strip assembly;

s400, lifting the first area of the rotor upwards through the auxiliary belt until the rotor is in a horizontal state;

wherein, the sequence of S100 and S200 can be exchanged.

2. Generator rotor lift leveling method according to claim 1, characterised in that in S200 the auxiliary belt is placed on the end of the rotor away from the first point of application.

3. Generator rotor lift leveling method according to claim 1, wherein a level is provided on the rotor, and the position state of the rotor is detected by the level.

4. Generator rotor lift leveling method according to claim 1, characterised in that if the rotor is lifted to the first area above the centre of gravity, the first area is lowered through the auxiliary belt until the rotor is level S400.

5. The generator rotor lifting and leveling method according to claim 4, wherein in S400, the auxiliary belt is driven by a chain block to lift or lower the first area of the rotor upwards.

6. A method for drawing through a generator rotor, characterized in that the method for leveling the rotor of a generator according to any one of claims 1 to 5 is used during the horizontal lifting of the rotor and moving it closer to or further away from the stator.

7. The generator rotor extraction method according to claim 6, wherein the preset position is a radial center region of the stator in S300.

8. The generator rotor draw-through method of claim 7, wherein a moving member is provided by which the harness assembly is moved synchronously with the auxiliary belt towards or away from the stator.

9. The method of claim 6, wherein extracting the rotor from the stator further comprises, prior to S100:

s110, a sliding block is placed on the end part, close to the first force application point, of the stator;

s120, enabling one end of the rotor to be supported by the sliding block, and hoisting the other end of the rotor to be in a horizontal state by a hoisting rope;

s130, arranging a traction assembly at the end part, close to the second force application point, of the rotor, and pulling the rotor to move along a first direction through the traction assembly until the sliding block and the rotor synchronously move until the sliding block reaches the end part of the stator, wherein the first direction is a direction in which the first force application point points to the second force application point;

s140, arranging a bracket at the end part of the rotor close to the second force application point, supporting the rotor through the sliding block and the bracket, and removing the traction assembly and the lifting rope.

10. The method of claim 6, wherein the step of threading the rotor into the stator further comprises, after step S400:

s410, placing the stator at one side of the rotor along a second direction, wherein the second direction is a direction in which the second force application point points to the first force application point;

s420, placing a sliding block at the end part of the stator close to the first force application point;

s430, the rotor is driven to move along the second direction through the hanging strip assembly and the auxiliary belt until one end, close to the first force application point, of the rotor extends into the stator and is supported by the sliding block;

s440, hoisting one end of the rotor close to the second force application point by using a hoisting rope, enabling the rotor to be in a horizontal state under the supporting of the sliding block and the hoisting action of the hoisting rope, and detaching the hoisting belt assembly and the auxiliary belt;

s450, a traction assembly is arranged at the end part, close to the first force application point, of the rotor, and the rotor is pulled to move along the second direction through the traction assembly until the sliding block and the rotor synchronously move until the rotor is installed in place.

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