CN113489267A - Large synchronous motor rotor axial thrust mounting process - Google Patents
Large synchronous motor rotor axial thrust mounting process Download PDFInfo
- Publication number
- CN113489267A CN113489267A CN202110732251.9A CN202110732251A CN113489267A CN 113489267 A CN113489267 A CN 113489267A CN 202110732251 A CN202110732251 A CN 202110732251A CN 113489267 A CN113489267 A CN 113489267A
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- Prior art keywords
- bearing seat
- rotating shaft
- bearing
- shaft
- axial thrust
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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
- H02K15/14—Casings; Enclosures; Supports
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Motor Or Generator Frames (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The invention relates to an axial thrust mounting process of a large synchronous motor rotor, wherein a top shaft (5) is placed in a dry ice freezing box for freezing and heat preservation for 4 hours, the top shaft is placed in a central hole of a rotating shaft (10) after the shrinkage of the outer diameter dimension reaches 0.05mm, the top shaft (5) and the rotating shaft (10) are temporarily fixed, the center height of the rotating shaft is measured when the top shaft (5) is restored to the room temperature, an O-shaped rubber sealing ring (9) is installed in a sealing groove of a bearing seat (4), and the bearing seat (4) is placed on a square box (13). The self-adaptive double-row self-aligning bearing device can realize the self-adaptive function along with the position of the jacking shaft, ensures that the double-row self-aligning bearing is always in a normal working state in the test process, enables the jacking shaft system to be well integrated into a motor rotating shaft system, effectively avoids the influence on axial thrust caused by shaft system interference, is flexible and convenient to install and disassemble, effectively reduces the installation difficulty, can be disassembled for reuse, and reduces the manufacturing cost.
Description
The technical field is as follows:
the invention relates to an axial thrust mounting process of a large synchronous motor rotor.
Background art:
the large synchronous motor is used in a large wind tunnel project and provides power for the compressor, the total tonnage of a motor rotor is close to 140 tons, the motor structure is a horizontal motor, the rotor is supported by two bearing seats, the motor and a thrust device of a compressor shafting system are designed on a rotor shaft of the compressor, and the motor is short of axial thrust when rotating independently. Because the synchronous motor bearing device for the large wind tunnel lacks axial thrust, the rotor is influenced by magnetic pulling force, wind power and axial component force of the self weight of the rotor after the motor rotates, the rotor can generate different axial displacements at different rotating speeds, when the displacement is overlarge, the end surface of a bearing bush table of the rotor can be attached to the end surface of a bearing bush in a bearing seat to perform abnormal friction, and the friction can cause the abnormal rise of the temperature of the bearing and the increase of the vibration of the motor to cause the abnormal operation. The invention provides an axial thrust mounting process for a large synchronous motor rotor, which can provide axial thrust for a motor single machine test and solve the problem of abnormal friction caused by thrust during the large horizontal motor single machine test.
The invention content is as follows:
the invention aims to provide an axial thrust mounting process of a large synchronous motor rotor, which is flexible and convenient to mount and dismount, effectively reduces the mounting difficulty, and can be dismounted and reused to reduce the manufacturing cost. The invention adopts the following technical scheme: the top shaft (5) is placed in a dry ice freezing box for freezing and heat preservation for 4 hours, when the shrinkage of the outer diameter dimension reaches 0.05mm, the top shaft is placed in a central hole of a rotating shaft (10), the top shaft (5) and the rotating shaft (10) are temporarily fixed, when the top shaft (5) returns to the room temperature, the center height of the rotating shaft is measured, an O-shaped rubber sealing ring (9) is installed in a sealing groove of a bearing seat (4), the bearing seat (4) is placed on a square box (13), a dial indicator is sucked on the outer diameter of the rotating shaft (10), the rotating shaft (10) is turned to read the data of the dial indicator, the position of the bearing seat is adjusted to be concentric with the inner hole of the rotating shaft (10), the concentricity is adjusted to be within 0.02mm, then the square box (13) is welded on a motor bottom plate, the joint of the bearing seat (4) and the square box (13) is welded and fixed, a self-aligning bearing (8) is coated with lubricating grease, and the self-aligning double-row bearing (8) is filled in from the rear end of the bearing seat (4), the convex spigot of the rear end cover plate (6) is installed in the inner circle of the bearing seat (4) and the bolt (11) is screwed down, so that the rear end cover plate (6) is fixed with the bearing seat (4), and the two front end cover plates (7) of the bearing seat are fixed on the bearing seat (4) by the screw (12).
The bearing seat (4) is formed by welding a bearing race (1), a support rib plate (2) and a base plate (3), and is subjected to stress relief annealing after welding and processed in a horizontal lathe and a boring machine.
The top shaft (5) is processed by hot rolling round steel.
The rear end cover plate (6) of the bearing seat is machined from a steel plate made of Q345B.
The front end cover plate (7) of the bearing seat is processed by a steel plate made of Q345B.
The working principle of the invention is as follows:
the axial thrust mounting process of the large synchronous motor rotor can axially limit the horizontal synchronous motor without a thrust device. The thrust mounting process comprises a bearing seat, an O-shaped rubber sealing ring, a bearing seat rear end cover plate, a bearing seat front end cover plate, a double-row self-aligning bearing, a top shaft and a connecting structure. Wherein the apical axis need be with in the central hole of dry ice refrigeration external diameter size shrink back its installation motor shaft, O shape rubber seal installs in the bearing frame seal groove, inhale the percentage table on the pivot external diameter, the dish moves the pivot and reads percentage table data, the bearing frame position is adjusted its hole and pivot to concentric, look for concentric back and fix square chest and bearing frame, the biserial self-aligning bearing is installed in the bearing frame after smearing lubricating grease, through fixing rear end apron with the bearing top to axial assigned position department, install the front end apron at last. The double-row self-aligning bearing is used as a support of the jacking shaft, and the double-row self-aligning bearing and the bearing seat are positioned by an O-shaped rubber sealing ring, so that the device has flexible functions of aligning and axial thrust.
The specific implementation process of the installation process is as follows: the top shaft is put into a dry ice freezing box for freezing and heat preservation for 4 hours, and is put into a central hole of the rotating shaft after the shrinkage of the outer diameter size reaches 0.05mm, temporarily fixing the top shaft and the rotating shaft, measuring the center height of the rotating shaft when the top shaft is restored to room temperature, installing an O-shaped rubber sealing ring in a sealing groove of a bearing seat, placing the bearing seat on a square box, sucking a dial indicator on the outer diameter of the rotating shaft, turning the rotating shaft to read the data of the dial indicator, adjusting the position of the bearing seat to adjust the inner hole of the bearing seat to be concentric with the rotating shaft, adjusting the concentricity to be within 0.02mm, then weld the square box on the motor bottom plate, the bearing frame welds fixedly with the square box junction, and the biserial self-aligning bearing is paintd lubricating grease, packs into the biserial self-aligning bearing from the bearing frame rear end, installs the back end apron tang and screws up the bolt in installing the circle in the bearing frame and make back end apron and bearing frame fixed, adopts the screw to fix two bearing frame front end apron on the bearing frame. And after the motor single-machine test is finished, polishing the welded junctions of the square box and the bearing seat, disassembling the bearing seat, and finally withdrawing the jackscrew jacking shaft from the central hole of the rotating shaft.
The invention has the beneficial effects that:
according to the self-aligning double-row self-aligning bearing, the self-aligning and certain axial thrust characteristics of the double-row self-aligning bearing are utilized, the inner hole of the bearing seat is in clearance fit with the double-row self-aligning bearing, the sealing groove is formed in the bearing seat and is used for installing the O-shaped rubber sealing ring, the outer circle of the double-row self-aligning bearing is fixed by utilizing the compressibility of the O-shaped rubber sealing ring, the double-row self-aligning bearing is in a flexible suspension state in the bearing seat, the up-down, left-right and angled self-aligning functions of the top shaft can be realized, and the axial thrust function is realized by utilizing the inner circle spherical surface of the outer circle of the double-row self-aligning bearing. The center height of the motor rotating shaft is also influenced by oil pressure and oil temperature when different axial displacements occur at different rotating speeds, the self-adaptive function of the motor rotating shaft along with the position of the jacking shaft can be realized by utilizing the compressibility of the O-shaped rubber sealing ring and the centering adjustable function of the double-row self-aligning bearing, the problem of axial thrust of the rotating shaft is solved, the problem that the jacking shaft and the double-row self-aligning bearing are concentric is also solved, the double-row self-aligning bearing is always in a normal working state in the test process, the jacking shaft system is well integrated into the motor rotating shaft system, and the influence on the axial thrust caused by shaft system interference is effectively avoided.
When the anti-thrust device is adopted, the function of axial limiting during rotation of the rotating shaft can be realized when the motor bearing has no anti-thrust function, and the anti-thrust device is an external anti-thrust device, so that the anti-thrust device is flexible and convenient to mount and dismount, the mounting difficulty is effectively reduced, and the anti-thrust device can be dismounted and reused, so that the manufacturing cost is reduced.
Drawings
FIG. 1 is a schematic view of a bearing housing of the present invention.
Fig. 2 is a top shaft illustration of the present invention.
FIG. 3 is a schematic view of the back end cap of the bearing housing of the present invention.
Fig. 4 is a schematic view of a front end of a bearing housing of the present invention.
Fig. 5 is a schematic diagram of the use of the present invention.
Detailed Description
As shown in figure 5, a large synchronous motor rotor axial thrust mounting process, a top shaft 5 is placed in a dry ice freezing box for freezing and heat preservation for 4 hours, when the shrinkage of the outer diameter dimension reaches 0.05mm, the top shaft 5 and a rotating shaft 10 are placed in a central hole of the rotating shaft 10 for temporary fixation, when the top shaft 5 returns to the room temperature to measure the central height of the rotating shaft, an O-shaped rubber sealing ring 9 is installed in a sealing groove of a bearing seat 4, the bearing seat 4 is placed on a square box 13, a dial indicator is sucked on the outer diameter of the rotating shaft 10, the rotating shaft 10 is turned to read the data of the dial indicator, the position of the bearing seat is adjusted to be concentric with the rotating shaft 10, the concentricity is adjusted to be within 0.02mm, then the square box 13 is welded on a motor bottom plate, the joint of the bearing seat 4 and the square box 13 is welded and fixed, a self-aligning bearing 8 is well coated, the self-aligning bearing 8 is installed in the rear end of the bearing seat 4, the convex spigot of the rear end cover plate 6 is arranged in the inner circle of the bearing seat 4, the bolt 11 is screwed down, so that the rear end cover plate 6 is fixed with the bearing seat 4, and the two front end cover plates 7 of the bearing seat are fixed on the bearing seat 4 by screws 12.
As shown in figure 1, the bearing seat 4 is formed by welding a bearing race 1, a support rib plate 2 and a base plate 3, and is subjected to stress relief annealing after welding and processed in a horizontal lathe and a boring machine.
As shown in fig. 2, the top shaft 5 is formed by hot rolling round steel.
The bearing seat rear end cover plate 6 is machined from a steel plate with the material Q345B.
The bearing seat front end cover plate 7 is machined from a steel plate made of Q345B.
As shown in figure 1, the bearing seat 4 of the invention is formed by welding a bearing race 1, a support rib plate 2 and a base plate 3, stress relief annealing is carried out after welding, a horizontal lathe and a boring mill are used for processing the bearing seat, and an inner hole is used for installing a double-row self-aligning bearing 8.
As shown in fig. 2, the top shaft 5 of the present invention is made of hot rolled round steel, and is installed in the central hole of the motor shaft 10, and one end surface of the top shaft is matched with the end surface of the inner sleeve of the double-row self-aligning bearing 8 to transmit the axial thrust of the shaft 10.
As shown in fig. 3, the cover plate 6 at the rear end of the bearing seat in the present invention is formed by machining a steel plate of Q345B, and is finally fixed to the rear end face of the bearing seat 4, and can transmit axial force to the bearing seat and has the function of sealing grease.
As shown in fig. 4, the front end cover plate 7 of the bearing housing according to the present invention is formed by machining a steel plate of Q345B, and functions as a grease seal.
As shown in fig. 5, which is a schematic view of the present invention, a top shaft 5 is placed in a dry ice freezer for freezing and heat preservation for 4 hours, after the shrinkage of the outer diameter dimension reaches 0.05mm, the top shaft 5 and a rotating shaft 10 are temporarily fixed, when the top shaft 5 returns to room temperature, the center height of the rotating shaft is measured, an O-shaped rubber seal ring 9 is installed in a seal groove of a bearing seat 4, the bearing seat 4 is placed on a square box 13, a dial indicator is sucked on the outer diameter of the rotating shaft 10, the rotating shaft 10 is turned to read the data of the dial indicator, the position of the bearing seat is adjusted to be concentric with the inner hole of the rotating shaft 10, the concentricity is adjusted to be within 0.02mm, then the square box 13 is welded on a motor base plate, the joint of the bearing seat 4 and the square box 13 is welded and fixed, the self-aligning bearing 8 is coated with grease, the self-aligning bearing 8 is installed into the double-aligning bearing 8 from the rear end of the bearing seat 4, the male end of the rear end cover plate 6 is installed in the bearing seat 4, the inner circle, the bolt 11 is tightened to fix the rear end cover plate 6 and the bearing seat 4, the two-piece bearing housing front end cover plate 7 is secured to the bearing housing 4 using screws 12.
The mounting process can realize axial positioning when the motor rotating shaft rotates when no axial thrust device is arranged during the design of the motor bearing, and compared with the conventional structure that the thrust shoe is added on the bearing, the mounting process has the advantages of flexible mounting and dismounting, low cost, wide centering adjustable range and the like.
Claims (5)
1. An axial thrust mounting process for a large synchronous motor rotor is characterized by comprising the following steps: the top shaft (5) is placed in a dry ice freezing box for freezing and heat preservation for 4 hours, when the shrinkage of the outer diameter dimension reaches 0.05mm, the top shaft is placed in a central hole of a rotating shaft (10), the top shaft (5) and the rotating shaft (10) are temporarily fixed, when the top shaft (5) returns to the room temperature, the center height of the rotating shaft is measured, an O-shaped rubber sealing ring (9) is installed in a sealing groove of a bearing seat (4), the bearing seat (4) is placed on a square box (13), a dial indicator is sucked on the outer diameter of the rotating shaft (10), the rotating shaft (10) is turned to read the data of the dial indicator, the position of the bearing seat is adjusted to be concentric with the inner hole of the rotating shaft (10), the concentricity is adjusted to be within 0.02mm, then the square box (13) is welded on a motor bottom plate, the joint of the bearing seat (4) and the square box (13) is welded and fixed, a self-aligning bearing (8) is coated with lubricating grease, and the self-aligning double-row bearing (8) is filled in from the rear end of the bearing seat (4), the convex spigot of the rear end cover plate (6) is installed in the inner circle of the bearing seat (4) and the bolt (11) is screwed down, so that the rear end cover plate (6) is fixed with the bearing seat (4), and the two front end cover plates (7) of the bearing seat are fixed on the bearing seat (4) by the screw (12).
2. The large synchronous motor rotor axial thrust mounting process according to claim 1 is characterized in that: the bearing seat (4) is formed by welding a bearing race (1), a support rib plate (2) and a base plate (3), and is subjected to stress relief annealing after welding and processed in a horizontal lathe and a boring machine.
3. The large synchronous motor rotor axial thrust mounting process according to claim 1 is characterized in that: the top shaft (5) is processed by hot rolling round steel.
4. The large synchronous motor rotor axial thrust mounting process according to claim 1 is characterized in that: the rear end cover plate (6) of the bearing seat is machined from a steel plate made of Q345B.
5. The large synchronous motor rotor axial thrust mounting process according to claim 1 is characterized in that: the front end cover plate (7) of the bearing seat is processed by a steel plate made of Q345B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110732251.9A CN113489267A (en) | 2021-06-30 | 2021-06-30 | Large synchronous motor rotor axial thrust mounting process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110732251.9A CN113489267A (en) | 2021-06-30 | 2021-06-30 | Large synchronous motor rotor axial thrust mounting process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113489267A true CN113489267A (en) | 2021-10-08 |
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ID=77936827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110732251.9A Pending CN113489267A (en) | 2021-06-30 | 2021-06-30 | Large synchronous motor rotor axial thrust mounting process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113489267A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101635488A (en) * | 2009-08-26 | 2010-01-27 | 中冶集团华冶资源开发有限责任公司 | Method for aligning concentricity of exciter rotor and generator rotor of turbogenerator |
| CN103078454A (en) * | 2012-12-31 | 2013-05-01 | 北京金风科创风电设备有限公司 | Heating device and method for assembling rotating shaft of generator by using same |
| CN203086275U (en) * | 2013-02-04 | 2013-07-24 | 西安泰富西玛电机有限公司 | Large-power motor's rolling bearing lubrication system |
| CN203707946U (en) * | 2013-12-04 | 2014-07-09 | 湘电莱特电气有限公司 | Motor |
| CN204089545U (en) * | 2014-08-21 | 2015-01-07 | 江西工埠机械有限责任公司 | Ultra-low speed big torsional moment motor and adopt the crane of this motor |
| CN205371331U (en) * | 2016-03-07 | 2016-07-06 | 河池学院 | Rotor support structure of banbury mixer |
| CN109139718A (en) * | 2018-10-22 | 2019-01-04 | 国电联合动力技术有限公司 | A kind of low wind speed large size double-fed Ban Zhiqu base bearing mechanism |
| CN112165208A (en) * | 2020-09-24 | 2021-01-01 | 哈尔滨电气动力装备有限公司 | Baseplate thrust structure for large motor |
-
2021
- 2021-06-30 CN CN202110732251.9A patent/CN113489267A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101635488A (en) * | 2009-08-26 | 2010-01-27 | 中冶集团华冶资源开发有限责任公司 | Method for aligning concentricity of exciter rotor and generator rotor of turbogenerator |
| CN103078454A (en) * | 2012-12-31 | 2013-05-01 | 北京金风科创风电设备有限公司 | Heating device and method for assembling rotating shaft of generator by using same |
| CN203086275U (en) * | 2013-02-04 | 2013-07-24 | 西安泰富西玛电机有限公司 | Large-power motor's rolling bearing lubrication system |
| CN203707946U (en) * | 2013-12-04 | 2014-07-09 | 湘电莱特电气有限公司 | Motor |
| CN204089545U (en) * | 2014-08-21 | 2015-01-07 | 江西工埠机械有限责任公司 | Ultra-low speed big torsional moment motor and adopt the crane of this motor |
| CN205371331U (en) * | 2016-03-07 | 2016-07-06 | 河池学院 | Rotor support structure of banbury mixer |
| CN109139718A (en) * | 2018-10-22 | 2019-01-04 | 国电联合动力技术有限公司 | A kind of low wind speed large size double-fed Ban Zhiqu base bearing mechanism |
| CN112165208A (en) * | 2020-09-24 | 2021-01-01 | 哈尔滨电气动力装备有限公司 | Baseplate thrust structure for large motor |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211008 |