CN114285238B - Method for adjusting rotor support out-of-roundness for motor - Google Patents
Method for adjusting rotor support out-of-roundness for motor Download PDFInfo
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- CN114285238B CN114285238B CN202111431602.9A CN202111431602A CN114285238B CN 114285238 B CN114285238 B CN 114285238B CN 202111431602 A CN202111431602 A CN 202111431602A CN 114285238 B CN114285238 B CN 114285238B
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Abstract
The invention discloses a method for adjusting rotor support out-of-roundness for a motor, which comprises the following steps: 1) Placing a rotor support to be adjusted on a horizontal supporting surface, determining an out-of-round position by measuring the inner diameter of the rotor support, and determining the directions of a long shaft and a short shaft of the out-of-round; 2) Placing an I-shaped reinforcing ring on a horizontal plane, installing two rows of staggered jacking screw rods with discs on the periphery of an inner side plate of the I-shaped reinforcing ring, adjusting the discs to the outermost side of the screw rods, and fixing through nuts; 3) Placing the rotor support inside the I-shaped reinforcing ring and leveling; 4) Adjusting the jacking screw rods in all directions, attaching the disc to the surface of the rotor support, and fixing the disc by using nuts on the outer side of the inner side plate; 5) The axial supporting seats are uniformly arranged through threaded holes of the end cover plate of the rotor bracket; 6) And locking the rotor support by a cross method, detecting the size of the inner diameter of the rotor until the rotor support is adjusted to be in a qualified range, and solving the problem of out-of-round of the inner diameter of the rotor support.
Description
Technical Field
The invention belongs to the field of generator manufacturing, and particularly relates to a method for adjusting rotor support out-of-roundness for a motor.
Background
The sleeving process of the megawatt motor is a core technology for manufacturing the motor, and the quality of the sleeving gap of the stator and the rotor directly relates to the air gap value of the motor, so that the performance of the generator is influenced. And the roundness of the rotor support is important to ensure that the sleeving gap of the stator and the rotor is uniform and qualified. Because the diameter of the rotor support of the megawatt motor is larger and the megawatt motor is developed towards the direction of larger diameter, the rotor support is possible to generate out-of-round phenomenon in the transportation, allocation and transportation and assembly processes due to some nonresistive factors. When the rotor support generates out-of-round and is sleeved with the stator, due to the influence of unilateral magnetic pull force, air gaps are uneven and even the stator and the rotor are attracted. For the rotor support with slight out-of-round, the conventional support factory has the method that the levelness of the rotor support is adjusted through the self weight of the rotor support; however, the rotor support is deformed greatly, and can only be scrapped when the rotor support cannot be leveled by self weight, one rotor support can weigh more than ten tons, and the number of high-power machine types is even more, so that the material cost and the production period are seriously wasted.
Disclosure of Invention
In order to achieve the purpose, the technical scheme of the invention is as follows: a method of adjusting rotor spider out-of-roundness for an electric motor, the method comprising the steps of:
1) Placing a rotor support to be adjusted on a horizontal supporting surface, determining an out-of-round position by measuring the inner diameter of the rotor support, and determining the directions of a long shaft and a short shaft of the out-of-round;
2) Placing an I-shaped reinforcing ring on a horizontal plane, installing two rows of staggered jacking screw rods with discs on the periphery of an inner side plate of the I-shaped reinforcing ring, adjusting the discs to the outermost side of the screw rods, and fixing the discs through nuts on the outer side of the inner side plate;
3) Placing a rotor support to be adjusted on the inner side of the I-shaped reinforcing ring, and leveling by using a leveling screw (a common leveling screw) on the I-shaped reinforcing ring;
4) Adjusting the jacking screw rods in all directions, attaching the disc to the surface of the rotor support, and fixing the disc by using nuts on the outer side of the inner side plate;
5) The axial supporting seats are uniformly arranged through threaded holes of an end cover plate of the rotor bracket;
6) Locking a jacking screw rod between the out-of-round long shaft and the short shaft of the rotor support by a cross method by using a fixed torque, detecting the size of the inner diameter of the rotor after the rotor support is placed for four hours, and repeating the steps until the rotor support is adjusted to be in a qualified range.
Based on above-mentioned technical scheme, in concrete implementation, the adjustment frock includes through the nut and the inboard plate fastening, and the tight screw rod in top, the axial bracing seat of rotor surface, the inboard plate of control I shape reinforcing ring circularity, backup pad, outer panel, the side muscle board, the tight screw rod in top on the rotor surface is the disc of taking the rubber cushion, is connected through welding and threaded screw rod, and the tight screw rod in top on the rotor surface in top outside nut is used for adjusting the rotor clearance, and the inboard is used for fixing the tight screw rod in top.
As an improvement of the invention, in the step 5), a leveling bolt is arranged on the upper top surface of the axial supporting seat.
As an improvement of the present invention, in the step 6), a double-torque lock is adopted for the tightening screw rod in the major axis direction, and a disc of the tightening screw rod in the minor axis direction is attached to the outer surface of the rotor support.
As an improvement of the invention, the inner side of the tightening screw rod is provided with a disc with a rubber cushion, and the disc is connected with the tightening screw rod with threads through welding.
As an improvement of the invention, the lower bottom surface of the axial supporting seat is fastened with a rotor end cover face hole through a bolt, the inner arc diameter of the lower bottom surface of the axial supporting seat is larger than the inner diameter of a rotor, a certain gap is reserved on a top surface platform on the axial supporting seat to support the I-shaped reinforcing ring, when the integral I-shaped reinforcing ring falls off from a rotor support, the protection effect is achieved, and an L-shaped hole is reserved in the middle of the axial supporting seat and is matched with a jacking screw rod for use when the L-shaped hole interferes with the jacking screw rod.
As an improvement of the invention, the inner diameter of the inner side plate is larger than the outer diameter of the rotor and is smaller than the length of the two jacking screws.
As an improvement of the invention, the distance between the upper top surface of the axial supporting seat and the gap of the supporting plate is 5mm, and the supporting plate plays a role of integral support.
As an improvement of the invention, the inner side plate is connected with the outer side plate through the supporting plate, the side rib plates are vertically distributed between the inner side plate and the outer side plate, and the inner side plate, the supporting plate, the side rib plates and the outer side plate form an I-shaped reinforcing ring.
Compared with the prior art, the invention has the beneficial effects that: the invention provides a tool for solving the problem of out-of-round inner diameter of a rotor support and ensuring the uniformity of a sleeving gap of a stator and a rotor.
Drawings
FIG. 1 is a flow chart of an out-of-round adjustment method in the present invention.
Fig. 2 is a schematic view of an i-shaped reinforcing ring structure according to the present invention.
FIG. 3 is a schematic view of the structure of the tightening screw of the present invention.
FIG. 4 is a schematic view of an axial supporting seat according to the present invention.
List of reference symbols: 100-tightening screw, 101-axial supporting seat, 102-inner side plate, 103-supporting plate, 104-outer side plate, 105-side rib plate, 106-rotor support, 107-nut, 108-disc, 109-rotor end cover surface, 110-I-shaped reinforcing ring, 111-leveling bolt and 112-L-shaped hole.
Detailed Description
The present invention will be further illustrated with reference to the accompanying drawings and specific embodiments, which are to be understood as merely illustrative of the invention and not as limiting the scope of the invention.
Example (b): referring to fig. 1-4, a method of adjusting out-of-roundness of a rotor support (106) for an electric machine, the method comprising the steps of:
1) Placing a rotor support (106) to be adjusted on a horizontal supporting surface, determining an out-of-round position by measuring the inner diameter of the rotor support (106), and determining the directions of a long axis and a short axis of the out-of-round;
2) The I-shaped reinforcing ring is placed on a horizontal plane, two rows of jacking screws (100) with disks (108) which are distributed in a staggered manner are arranged on the periphery of an inner side plate (102) of the I-shaped reinforcing ring, the disks (108) are adjusted to the outermost side of the screws, and the screws are fixed through nuts (107) on the outer side of the inner side plate (102);
3) Placing a rotor bracket (106) to be adjusted on the inner side of the I-shaped reinforcing ring, and leveling by using a leveling screw rod;
4) Adjusting the jacking screws (100) in all directions, attaching the disc (108) to the surface of the rotor bracket (106), and fixing the disc by using outer nuts (107) of the inner side plate (102);
5) Axial supporting seats (101) are uniformly arranged through threaded holes of an end cover plate of the rotor bracket (106);
6) Locking a jacking screw rod (100) between the out-of-round long shaft and the short shaft of the rotor support (106) by using a fixed torque through a cross method, detecting the inner diameter size of the rotor after the rotor support is placed for four hours, and repeating the steps until the rotor support (106) is adjusted to be in a qualified range.
Based on the technical scheme, in the concrete implementation, the adjusting tool comprises a jacking screw rod (100) which is propped against the outer surface of the rotor, an axial supporting seat (101), an inner side plate (102) which controls the roundness of an I-shaped reinforcing ring (110), a supporting plate (103), an outer side plate (104) and a side rib plate (105), wherein the jacking screw rod (100) which is propped against the outer surface of the rotor is a disc (108) with a rubber cushion and is connected with the threaded screw rod through welding, the outer nut (107) of the jacking screw rod (100) which is propped against the outer surface of the rotor is used for adjusting the gap of the rotor, and the inner side of the outer nut is used for fixing the jacking screw rod (100).
Further, leveling bolts (111) are arranged on the upper top surface of the axial supporting seat (101) in the step 5).
Further, in the step 6), double-torque locking is adopted for the tightening screw rod (100) in the major axis direction, and the disc (108) of the tightening screw rod (100) in the minor axis direction is attached to the outer surface of the rotor support (106).
Furthermore, a disc (108) with a rubber cushion is arranged on the inner side of the tightening screw rod (100) and is connected with the tightening screw rod (100) with threads through welding.
Further, the lower bottom surface of the axial supporting seat (101) is fastened with a hole in a rotor end cover surface (109) through a bolt, the inner arc diameter of the lower bottom surface of the axial supporting seat (101) is larger than the inner diameter of a rotor, a certain gap is reserved on a top surface platform on the axial supporting seat (101) to support the I-shaped reinforcing ring (110), when the integral I-shaped reinforcing ring (110) falls off from the rotor support (106), a protective effect is achieved, and an L-shaped hole (112) is reserved in the middle of the axial supporting seat (101) and is used in a matched mode when interfering with the jacking screw rod (100).
Further, the inner diameter of the inner side plate (102) is larger than the outer diameter of the rotor and is smaller than the length of the two jacking screws (100).
Furthermore, the distance between the upper top surface of the axial supporting seat (101) and the gap between the supporting plate (103) is 5mm, and the supporting plate (103) plays a role of integral support.
Furthermore, the inner side plate (102) is connected with the outer side plate (104) through a support plate (103), side rib plates (105) are vertically distributed between the inner side plate (102) and the outer side plate (104), and the inner side plate (102), the support plate (103), the side rib plates (105) and the outer side plate (104) form an I-shaped reinforcing ring (110).
The working principle is as follows: when the rotor support is used, a reinforcing ring is placed on a horizontal plane, two rows of jacking screw rods (100) with disks (108) which are distributed in a staggered mode are installed, the disks (108) are adjusted to the outermost side and are fixed through nuts (107) on the outer side of an inner side plate (102), a rotor support (106) to be adjusted is placed on the inner side of the reinforcing ring and is leveled through leveling screws, the jacking screw rods (100) in all directions are adjusted, a circular platform with rubber pads is attached to the surface of the rotor support (106), and the circular platform is fixed through nuts (107) on the outer side of the inner side plate (102); the axial supporting seat (101) is uniformly arranged through the threaded hole of the rotor end cover plate, and finally the jacking screw rod (100) is locked until the rotor support (106) is adjusted to be in a qualified range.
It should be noted that the above-mentioned contents only illustrate the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and it is obvious to those skilled in the art that several modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations fall within the protection scope of the claims of the present invention.
Claims (8)
1. A method for adjusting rotor support out-of-roundness for a motor is characterized by comprising the following steps:
1) Placing a rotor support to be adjusted on a horizontal supporting surface, determining an out-of-round position by measuring the inner diameter of the rotor support, and determining the directions of a long shaft and a short shaft of the out-of-round;
2) Placing an I-shaped reinforcing ring on a horizontal plane, installing two rows of staggered jacking screw rods with discs on the periphery of an inner side plate of the I-shaped reinforcing ring, adjusting the discs to the outermost side of the screw rods, and fixing the discs through nuts on the outer side of the inner side plate;
3) Placing a rotor bracket to be adjusted on the inner side of the I-shaped reinforcing ring, and leveling by using a leveling screw rod;
4) Adjusting the jacking screw rods in all directions, attaching the disc to the outer surface of the rotor bracket, and fixing the disc by using nuts on the outer side of the inner side plate;
5) The axial supporting seats are uniformly arranged through threaded holes of the end cover plate of the rotor bracket;
6) Locking a jacking screw rod between the out-of-round long shaft and the short shaft of the rotor support by a cross method by using a fixed torque, detecting the size of the inner diameter of the rotor after the rotor support is placed for four hours, and repeating the steps until the rotor support is adjusted to be in a qualified range.
2. The method for adjusting the out-of-round of the rotor bracket for the motor as recited in claim 1, wherein in the step 5), a leveling bolt for mounting and leveling the axial supporting seat is arranged on the upper top surface of the axial supporting seat.
3. The method as claimed in claim 1, wherein step 6) comprises locking the tightening screw in the major axis direction with a double torque, and the disc of the tightening screw in the minor axis direction is attached to the outer surface of the rotor holder.
4. The method for adjusting the rotor bracket out of round for the motor as claimed in claim 1, wherein a disc with a rubber cushion is arranged inside the tightening screw, and the disc is connected with the tightening screw with a thread by welding.
5. The method as claimed in claim 1, wherein the lower bottom surface of the axial support seat is fastened to the rotor end cover face hole by a bolt, the inner arc diameter of the lower bottom surface of the axial support seat is larger than the inner diameter of the rotor, and a certain gap is left between the top platform of the axial support seat and the top platform of the axial support seat.
6. The method for adjusting the rotor holder out of round for the motor as recited in claim 1, wherein the inner diameter of the inner side plate is larger than the outer diameter of the rotor and smaller than the length of two jacking screws.
7. The method of claim 5, wherein the distance between the top surface of the axial support seat and the gap between the support plates is 5mm.
8. The method for adjusting the out-of-round shape of the rotor support for the motor according to any one of claims 1 to 7, wherein the inner plate is connected with the outer plate through a support plate, side rib plates are vertically distributed between the inner plate and the outer plate, and the inner plate, the support plate, the side rib plates and the outer plate form an I-shaped reinforcing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111431602.9A CN114285238B (en) | 2021-11-29 | 2021-11-29 | Method for adjusting rotor support out-of-roundness for motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111431602.9A CN114285238B (en) | 2021-11-29 | 2021-11-29 | Method for adjusting rotor support out-of-roundness for motor |
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| Publication Number | Publication Date |
|---|---|
| CN114285238A CN114285238A (en) | 2022-04-05 |
| CN114285238B true CN114285238B (en) | 2022-11-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111431602.9A Active CN114285238B (en) | 2021-11-29 | 2021-11-29 | Method for adjusting rotor support out-of-roundness for motor |
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Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1066312A (en) * | 1996-06-14 | 1998-03-06 | Fuji Electric Co Ltd | Assembling device for permanent magnet synchronous motor |
| CN210198352U (en) * | 2019-07-02 | 2020-03-27 | 天津市天发重型水电设备制造有限公司 | Circle measuring device for rotor of hydraulic generator |
| CN112271884B (en) * | 2020-11-17 | 2023-04-25 | 哈尔滨电机厂有限责任公司 | Technological method for replacing rotor bracket by retaining original magnetic yoke |
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