CN111562093A - Method for judging damage of ultralong metal slot wedge of large motor rotor - Google Patents
Method for judging damage of ultralong metal slot wedge of large motor rotor Download PDFInfo
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- CN111562093A CN111562093A CN202010259363.2A CN202010259363A CN111562093A CN 111562093 A CN111562093 A CN 111562093A CN 202010259363 A CN202010259363 A CN 202010259363A CN 111562093 A CN111562093 A CN 111562093A
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- slot wedge
- wedge
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- traction force
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0061—Force sensors associated with industrial machines or actuators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
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- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Manufacture Of Motors, Generators (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
Abstract
The invention discloses a method for judging the grinding damage of an ultralong metal slot wedge of a large motor rotor, which comprises the following steps: A. acquiring data information of the traction force of the assembled slot wedges along with the change of the loading length of the slot wedges under the condition that the slot wedges are not abraded in the assembling process; B. based on the change data information of the traction force along with the loading length of the slot wedge, which is obtained in the step A, a first traction force curve with the largest change rate of the traction force along with the loading length of the slot wedge is obtained, and a second traction force curve with the smallest change rate of the traction force along with the loading length of the slot wedge is obtained; C. and realizing the grinding judgment of the currently assembled slot wedge based on the traction force data and the slot wedge loading length data of the slot wedge in the assembling process, which are measured in real time, and the data information of the first traction force curve and/or the second traction force curve. By the method, the problem that whether the slot wedge is damaged or not in the assembling process can be intuitively, efficiently and accurately judged, and the problems of uncertainty and inefficiency of traditional manual judgment are avoided.
Description
Technical Field
The invention belongs to the field of large motor rotor slot wedge assembly, and particularly relates to a method for judging slot wedge damage in an overlong metal slot wedge assembly process.
Background
The conventional large-scale motor rotor slot wedge assembling structure is characterized in that a plurality of slot wedges are assembled in each slot, the length of each slot wedge is short, and the assembling stroke is short. However, due to the structural difference, part of the machine set slot wedges are ultra-long metal slot wedges, the assembly stroke is long, the assembly traction force is increased along with the increase of the insertion depth of the slot wedges, and the slot wedges are easy to be damaged due to bending, assembly angle deviation, uneven assembly gaps and the like.
The existing assembly scheme enables the slot wedge to be aligned with the dovetail of the rotor notch and keep parallel by adjusting the slot wedge assembly adjusting device, the slot wedge is pulled into the rotor by a manual operation traction device, and if the slot wedge is abraded, the slot wedge is assembled again after being retreated to finish the slot wedge assembly work.
Although the scheme can realize slot wedge assembly, the traction force cannot be effectively controlled, and whether the abrasion occurs or not is judged only by the experience of an operator. Because of lacking the traction force measuring device, consequently can't the accurate size of measuring the traction force in the assembling process, simultaneously, because of lacking data, can't scientific, effective judgement slot wedge whether exists the damage of lapping in the assembling process.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and discloses a method for judging the lapping of the overlong metal slot wedge of the large-scale motor rotor.
The purpose of the invention is realized by the following technical scheme:
a method for judging the lapping damage of the ultralong metal slot wedge of a large motor rotor at least comprises the following steps: a, acquiring data information of the traction force of the assembled slot wedges along with the change of the loading length of the slot wedges under the condition that the slot wedges are not abraded in the assembling process; B. based on the change data information of the traction force along with the loading length of the slot wedge, which is obtained in the step A, a first traction force curve with the largest change rate of the traction force along with the loading length of the slot wedge is obtained, and a second traction force curve with the smallest change rate of the traction force along with the loading length of the slot wedge is obtained; C. and realizing the grinding judgment of the currently assembled slot wedge based on the traction force data and the slot wedge loading length data of the slot wedge in the assembling process, which are measured in real time, and the data information of the first traction force curve and/or the second traction force curve.
According to a preferred embodiment, in step C, the slot wedges are loaded to the same length, and when the traction value of the slot wedge measured in real time is greater than the corresponding traction value on the first traction curve, it is determined that the currently assembled slot wedge has a scratch.
An assembly method of a large motor rotor overlong metal slot wedge comprises the following steps: s1: adjusting the slot wedge assembly adjusting device to enable the slot wedge to be aligned and parallel to the rotor slot dovetail; s2: starting a slot wedge traction device, and pulling the slot wedge to slide at the dovetail position of the rotor slot; s3: the acquisition of the slot wedge loading length data and the corresponding traction force data in the slot wedge assembling process is completed through the slot wedge traction device, and the slot wedge grinding judgment is completed by adopting the grinding judgment method disclosed above; s4: when the lapping is judged to occur, the step S2 is repeated after the slot wedge processing and lapping are quitted; and when the abrasion does not occur, the slot wedge traction device continues to pull the slot wedge to assemble, and the abrasion judgment method disclosed in the foregoing is continuously performed to finish the abrasion judgment of the slot wedge until the assembly of the slot wedge is finished.
According to a preferred embodiment, a traction force measuring unit and a traction displacement measuring unit are arranged in the slot wedge traction device and are respectively used for measuring the traction force and the loading length of the slot wedge in the slot wedge traction process.
An assembly system of a large-scale motor rotor overlong metal slot wedge at least comprises a slot wedge traction device, a rotor, a slot wedge and a slot wedge assembly adjusting device; the assembly system is matched to complete the assembly of the slot wedge by adopting the assembly method of the overlong metal slot wedge of the large-scale motor rotor disclosed in the foregoing.
According to a preferred embodiment, the slot wedge traction device is provided with an electric winch, and the electric winch is connected with the slot wedge through a traction line.
The main scheme and the further selection schemes can be freely combined to form a plurality of schemes which are all adopted and claimed by the invention; in the invention, the selection (each non-conflict selection) and other selections can be freely combined. The skilled person in the art can understand that there are many combinations, which are all the technical solutions to be protected by the present invention, according to the prior art and the common general knowledge after understanding the scheme of the present invention, and the technical solutions are not exhaustive herein.
The invention has the beneficial effects that: according to the technical scheme, the traditional traction device is optimized, the labor intensity of operators is reduced, meanwhile, the traction force measuring unit is used in a matched mode, the traction force can be read accurately in real time, and in addition, whether the slot wedge is damaged or not can be analyzed and judged according to the coincidence degree of the traction force and the traction force curve at a specific moment. Moreover, the disclosed scratch judgment method can intuitively, efficiently and accurately judge whether the scratch occurs in the assembling process of the slot wedge, and avoids the problems of uncertainty and inefficiency of the traditional manual judgment.
Drawings
FIG. 1 is a schematic diagram showing the relationship between the traction force and the loading length of the slot wedge during the process of assembling the slot wedge according to the determination method of the present invention;
FIG. 2 is a schematic flow chart of an assembly method of a large motor rotor overlong metal slot wedge disclosed by the invention;
FIG. 3 is a schematic view of the rotor overlength slot wedge assembly providing structure of the present invention;
the device comprises a 1-slot wedge traction device, a 2-rotor, a 3-slot wedge and a 4-slot wedge assembly adjusting device.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It should be noted that, in order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments.
Thus, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. 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.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations and positional relationships that are conventionally used in the products of the present invention, and are used merely for convenience in describing the present invention and for simplicity in description, but do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, it should be noted that, in the present invention, if the specific structures, connection relationships, position relationships, power source relationships, and the like are not written in particular, the structures, connection relationships, position relationships, power source relationships, and the like related to the present invention can be known by those skilled in the art without creative work on the basis of the prior art.
Example 1:
referring to fig. 1, a method for judging damage of an ultra-long metal slot wedge of a large motor rotor at least includes the following steps:
and step A, acquiring data information of the traction force of the assembled slot wedges along with the change of the loading length of the slot wedges under the condition that the slot wedges are not abraded in the assembling process.
And B, obtaining a first traction force curve with the maximum traction force change rate along with the loading length of the slot wedge and a second traction force curve with the minimum traction force change rate along with the loading length of the slot wedge based on the change data information of the traction force along with the loading length of the slot wedge, which is obtained in the step A. In particular, the first and second traction curves are shown in fig. 1.
And C, based on the traction force data and the wedge loading length data of the wedge in the assembly process measured in real time and the data information of the first traction force curve and/or the second traction force curve, the grinding judgment of the currently assembled wedge is realized.
Further, in the step C, the slot wedges are installed in the same length, and when the traction value of the slot wedge measured in real time is larger than the corresponding traction value on the first traction curve, it is determined that the currently assembled slot wedge has a scratch.
Therefore, by the method for judging the grinding damage disclosed by the embodiment, the problem that whether the slot wedge is ground or not in the assembling process can be intuitively, efficiently and accurately judged, and the problems of uncertainty and low efficiency of traditional manual judgment are avoided.
Example 2:
as shown in fig. 2. On the basis of embodiment 1, the embodiment discloses an assembling method of a large motor rotor overlong metal slot wedge.
Preferably, the assembly method comprises the steps of:
step S1: and adjusting the slot wedge assembly adjusting device to enable the slot wedge to be aligned with and keep parallel to the rotor slot dovetail.
Step S2: and starting the slot wedge traction device, and pulling the slot wedge to slide at the dovetail position of the rotor slot opening.
Step S3: the acquisition of the slot wedge loading length data and the corresponding traction data in the slot wedge assembling process is completed through the slot wedge traction device, and the slot wedge damage judgment is completed by adopting the damage judgment method in the embodiment 1.
Step S4: when the lapping is judged to occur, the step S2 is repeated after the slot wedge processing and lapping are quitted; when the groove wedge is judged not to be damaged, the groove wedge traction device continues to pull the groove wedge to be assembled, and the damage judgment method of claim 1 is continuously carried out to finish the damage judgment of the groove wedge until the groove wedge is assembled.
Preferably, a traction force measuring unit and a traction displacement measuring unit are arranged in the slot wedge traction device and are respectively used for measuring the traction force and the loading length of the slot wedge in the slot wedge traction process.
Example 3:
as shown in fig. 3. On the basis of embodiment 2, the embodiment discloses an assembly system of a large motor rotor overlong metal slot wedge.
Preferably, the fitting system comprises at least a wedge traction device 1, a rotor 2, a wedge 3 and a wedge fitting adjustment device 4; the assembly system is adapted to complete the assembly of the slot wedge using the method of claim 3.
Preferably, the pulling device 1 is used to complete the pulling assembly of the wedge 3 into the rotor 2. The slot wedge assembly adjusting device 4 is used for completing the initial position adjustment of the slot wedge 3 so as to ensure that the slot wedge 3 can be accurately assembled into the rotor 2.
Preferably, an electric winch is arranged on the slot wedge traction device 1 and connected with the slot wedge 3 through a traction line.
Furthermore, the electric capstan is provided with a traction force measuring unit and a traction displacement measuring unit which are respectively used for measuring the traction force and the insertion length of the slot wedge in the traction process of the slot wedge 3.
The work flow of the assembly system comprises the following steps:
and adjusting the slot wedge assembly adjusting device 4 to ensure that the slot wedge 3 to be assembled is aligned and kept parallel with the slot dovetails of the rotor 2. And starting the slot wedge traction device 1, and pulling the slot wedge 3 to slide at the slot dovetail of the rotor through the electric capstan.
At this time, an accurate value of the traction force can be obtained by the traction force measuring unit of the slot wedge traction apparatus 1, and the measurement of the loading length of the slot wedge 3 is completed by the traction displacement measuring unit.
In the initial stage, the loading length of the slot wedges 3 is small, the traction force is small, the dovetail contact area of the slot wedges 3 and the slot opening of the sequencing rotor 2 is increased along with the increase of the loading length of the slot wedges 3, the friction force is increased, the traction force is correspondingly increased, but the traction force is relatively linearly increased within a certain range, namely the traction force value is positioned in a first traction force curve and a second traction force curve within a certain range, as shown in figure 2.
If the slot wedge 3 is abraded in the traction process, the traction force is remarkably increased in a jumping mode, and the traction force value is positioned outside two traction force curves, so that whether the slot wedge 3 is abraded or not can be analyzed and judged by analyzing the coincidence degree of the traction force value and the traction curve at a specific moment.
The foregoing basic embodiments of the invention and their various further alternatives can be freely combined to form multiple embodiments, all of which are contemplated and claimed herein. In the scheme of the invention, each selection example can be combined with any other basic example and selection example at will. Numerous combinations will be known to those skilled in the art.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. A grinding judgment method for a large motor rotor overlong metal slot wedge is characterized by at least comprising the following steps:
A. acquiring data information of the traction force of the assembled slot wedges along with the change of the loading length of the slot wedges under the condition that the slot wedges are not abraded in the assembling process;
B. based on the change data information of the traction force along with the loading length of the slot wedge, which is obtained in the step A, a first traction force curve with the largest change rate of the traction force along with the loading length of the slot wedge is obtained, and a second traction force curve with the smallest change rate of the traction force along with the loading length of the slot wedge is obtained;
C. and realizing the grinding judgment of the currently assembled slot wedge based on the traction force data and the slot wedge loading length data of the slot wedge in the assembling process, which are measured in real time, and the data information of the first traction force curve and/or the second traction force curve.
2. The method for judging the damage of the overlong metal slot wedge of the large motor rotor as claimed in claim 1, wherein in the step C, the slot wedges are installed in the same length, and when the traction value of the slot wedge measured in real time is greater than the corresponding traction value on the first traction curve, the damage of the currently assembled slot wedge is judged.
3. The assembly method of the overlong metal slot wedge of the large motor rotor is characterized by comprising the following steps of:
s1: adjusting the slot wedge assembly adjusting device to enable the slot wedge to be aligned and parallel to the rotor slot dovetail;
s2: starting a slot wedge traction device, and pulling the slot wedge to slide at the dovetail position of the rotor slot;
s3: the acquisition of the wedge loading length data and the corresponding traction data in the wedge assembling process is completed through a wedge traction device, and the judgment of the wedge grinding is completed by adopting the grinding judgment method as claimed in claim 1;
s4: when the lapping is judged to occur, the step S2 is repeated after the slot wedge processing and lapping are quitted; when the groove wedge is judged not to be damaged, the groove wedge traction device continues to pull the groove wedge to be assembled, and the damage judgment method of claim 1 is continuously carried out to finish the damage judgment of the groove wedge until the groove wedge is assembled.
4. A method for assembling slot wedges of an electric motor rotor according to claim 3, wherein a traction force measuring unit and a traction displacement measuring unit are arranged in the slot wedge traction device and are respectively used for measuring the traction force and the loading length of the slot wedges in the slot wedge traction process.
5. The assembly system of the overlength metal slot wedge of a large-scale electric motor rotor is characterized by at least comprising a slot wedge traction device (1), a rotor (2), a slot wedge (3) and a slot wedge assembly adjusting device (4); the assembly system is adapted to complete the assembly of the wedge (3) using the method according to claim 3.
6. The assembling system of the large motor rotor overlength metal slot wedge according to claim 5, characterized in that the slot wedge traction device (1) is provided with an electric winch, and the electric winch is connected with the slot wedge through a traction line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010259363.2A CN111562093A (en) | 2020-04-03 | 2020-04-03 | Method for judging damage of ultralong metal slot wedge of large motor rotor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010259363.2A CN111562093A (en) | 2020-04-03 | 2020-04-03 | Method for judging damage of ultralong metal slot wedge of large motor rotor |
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| CN111562093A true CN111562093A (en) | 2020-08-21 |
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| CN202010259363.2A Pending CN111562093A (en) | 2020-04-03 | 2020-04-03 | Method for judging damage of ultralong metal slot wedge of large motor rotor |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1058492A (en) * | 1990-07-26 | 1992-02-05 | 通用电气公司 | Generator rotor coil slot wedge assembly/disassembly tool and anchor clamps |
| CN1075207A (en) * | 1992-01-30 | 1993-08-11 | 西屋电气公司 | The device and method that is used for the impulse test of electric generator stator wedge tightness |
| CN1884990A (en) * | 2006-07-04 | 2006-12-27 | 清华大学深圳研究生院 | Vibrating detection method for detecting looseness of large-scale generator rotor slot wedge and apparatus therefor |
| CN101453150A (en) * | 2007-12-07 | 2009-06-10 | 三菱电机株式会社 | Coil-slot wedge inserting device |
| CN201869045U (en) * | 2010-12-12 | 2011-06-15 | 南车株洲电机有限公司 | Tool for pushing in slot wedge |
| CN102323059A (en) * | 2011-08-31 | 2012-01-18 | 华南理工大学 | The axle riveting hub-bearing unit supervisory system and the method for axial riveting force and displacement |
| CN207218478U (en) * | 2017-08-30 | 2018-04-10 | 中广核核电运营有限公司 | The robot of slot wedge positioning is carried out using distance sensing device |
| CN108418356A (en) * | 2018-04-16 | 2018-08-17 | 山东齐鲁电机制造有限公司 | Rotor of steam turbo generator slot wedge assembly equipment |
| CN108500195A (en) * | 2018-04-04 | 2018-09-07 | 眉山中车紧固件科技有限公司 | intelligent riveting quality monitoring method |
| CN109546814A (en) * | 2018-12-20 | 2019-03-29 | 广州市卓易精密机械有限公司 | A kind of motor stator insulated groove wedge automatic-inserting device |
-
2020
- 2020-04-03 CN CN202010259363.2A patent/CN111562093A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1058492A (en) * | 1990-07-26 | 1992-02-05 | 通用电气公司 | Generator rotor coil slot wedge assembly/disassembly tool and anchor clamps |
| CN1075207A (en) * | 1992-01-30 | 1993-08-11 | 西屋电气公司 | The device and method that is used for the impulse test of electric generator stator wedge tightness |
| CN1884990A (en) * | 2006-07-04 | 2006-12-27 | 清华大学深圳研究生院 | Vibrating detection method for detecting looseness of large-scale generator rotor slot wedge and apparatus therefor |
| CN101453150A (en) * | 2007-12-07 | 2009-06-10 | 三菱电机株式会社 | Coil-slot wedge inserting device |
| CN201869045U (en) * | 2010-12-12 | 2011-06-15 | 南车株洲电机有限公司 | Tool for pushing in slot wedge |
| CN102323059A (en) * | 2011-08-31 | 2012-01-18 | 华南理工大学 | The axle riveting hub-bearing unit supervisory system and the method for axial riveting force and displacement |
| CN207218478U (en) * | 2017-08-30 | 2018-04-10 | 中广核核电运营有限公司 | The robot of slot wedge positioning is carried out using distance sensing device |
| CN108500195A (en) * | 2018-04-04 | 2018-09-07 | 眉山中车紧固件科技有限公司 | intelligent riveting quality monitoring method |
| CN108418356A (en) * | 2018-04-16 | 2018-08-17 | 山东齐鲁电机制造有限公司 | Rotor of steam turbo generator slot wedge assembly equipment |
| CN109546814A (en) * | 2018-12-20 | 2019-03-29 | 广州市卓易精密机械有限公司 | A kind of motor stator insulated groove wedge automatic-inserting device |
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Application publication date: 20200821 |