CN216564698U - Device for fixing motor rotor in circulating sea water pump of nuclear power station - Google Patents
Device for fixing motor rotor in circulating sea water pump of nuclear power station Download PDFInfo
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- CN216564698U CN216564698U CN202122772284.4U CN202122772284U CN216564698U CN 216564698 U CN216564698 U CN 216564698U CN 202122772284 U CN202122772284 U CN 202122772284U CN 216564698 U CN216564698 U CN 216564698U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The utility model belongs to the technical field of maintenance engineering of rotating equipment of a nuclear power station, and particularly relates to a device for fixing a motor rotor in a circulating seawater pump of the nuclear power station.
Description
Technical Field
The application belongs to the technical field of maintenance engineering of rotating equipment of a nuclear power station, and particularly relates to a device for fixing a motor rotor in a circulating seawater pump of the nuclear power station.
Background
And the circulating seawater pump of the nuclear power station is used for supplying circulating cooling water to the steam turbine condenser and discharging the circulating water from the condenser to the sea. The motor of the circulating sea water pump is a pole-changing double-speed induction motor, and 4 radial guide bearings are respectively arranged at the upper part and the lower part to ensure that a motor rotor is positioned at the central position during the operation and ensure that the motor rotor and the pump rotor are concentric.
At present, the problems of abnormal sound and vibration increase occur for a plurality of times in the radial guide bearing on the upper part of the motor, so that the reliability of equipment is reduced.
SUMMERY OF THE UTILITY MODEL
The application aims at providing a device for fixing a motor rotor in a circulating seawater pump of a nuclear power station, and solving the problems that a radial guide bearing on the upper part of a machine has abnormal sound and vibration and is enlarged for many times.
The technical scheme for realizing the purpose of the application is as follows:
the device for fixing the motor rotor in the circulating seawater pump of the nuclear power station provided by the embodiment of the application comprises: the device comprises a bracket surrounding cylinder, a rotor positioning assembly and a locking assembly;
the motor rotor is positioned inside the bracket enclosure;
the rotor positioning assemblies are multiple and are used for fixing the motor rotor in the center of the inner part of the bracket enclosure;
the rotor positioning assembly is fixed on the support surrounding barrel through a bearing fastening bolt, and the head of the bearing fastening bolt is locked and fixed with the support surrounding barrel through the locking assembly.
Optionally, the locking assembly includes: a locking ring and a locking plate;
the shape of the inner hole of the locking ring is matched with that of the head of the bearing fastening bolt, and the locking ring is used for fixing the head of the bearing fastening bolt;
one end of the locking plate is used for fixing the locking ring; and the other end of the locking plate is provided with a bolt through hole for fixing the locking plate on the support surrounding barrel.
Alternatively to this, the first and second parts may,
the locking plate is of an arc-shaped structure and is matched with the outer arc of the support surrounding cylinder in size.
Alternatively to this, the first and second parts may,
one end of the locking plate is arc-shaped, and the arc-shaped is aligned with the excircle of the locking ring and then fixed through at least one welding point.
Alternatively to this, the first and second parts may,
the inner hole of the locking ring is an inner hexagonal hole and is matched with an outer hexagonal hole at the head part of the bearing fastening bolt, and each matching surface cannot pass through the hole when being checked by a 0.03mm feeler gauge.
Alternatively to this, the first and second parts may,
the bearing fastening bolt is a flange bolt.
Alternatively to this, the first and second parts may,
and one end of the locking plate is provided with a sunken table top for accommodating the flange of the bearing fastening bolt when the inner side of the locking plate is tightly attached to the outer circular arc of the bracket enclosure.
Optionally, the rotor positioning assembly includes: a bearing pad and a guide bearing;
the guide bearing is of an arc-shaped structure, the radian of the inner side of the guide bearing is matched with the outer side of the motor rotor, and the outer side of the guide bearing is tightly attached to the inner side of the bearing shell;
the guide bearing and the bearing bush are fixed through a bearing bush fastening bolt;
the outer side of the tile pillow is tightly attached to the inner wall of the support surrounding cylinder, and the tile pillow is fixed with the support surrounding cylinder through the bearing fastening bolt.
In the alternative,
the outer side of the tile pillow is provided with a bulge, and the bulge is tightly attached to the inner wall of the support surrounding cylinder.
Alternatively to this, the first and second parts may,
the tile pillow is provided with 4 first through holes and 2 second through holes;
the first through hole is used for fixing the tile sleeper fastening bolt;
the second through hole is used for fixing the bearing fastening bolt.
The beneficial technical effect of this application lies in:
1) the application provides a pair of a device for fixing electric motor rotor among nuclear power station circulating sea water pump, simple structure, simple to operate, locking ring can closely laminate with fastening bolt, reduces the bolt and rocks, prevents that the bolt from becoming flexible, has reduced the not flexible risk of bearing fastening bolt effectively, has improved sea water circulating pump operational reliability.
2) The application provides a pair of a device for fixing electric motor rotor among nuclear power station circulating seawater pump, the locking plate has certain radian, can with the better laminating of support surrounding barrel, increase area of contact.
3) The application provides a pair of a device for fixing electric motor rotor among nuclear power station circulating sea water pump, with original bolt and the change of lock washer form for flange face bolt, stop the lock washer inefficacy and arouse the not hard up risk of bolt.
4) The application provides a pair of a device for fixing electric motor rotor among nuclear power station circulating sea water pump, locking plate and locking ring adopt spot welding to be connected, have adaptation bolt hexagonal face position and used repeatedly's characteristics.
Drawings
Fig. 1 is a schematic structural diagram of a device for fixing a motor rotor in a circulating seawater pump of a nuclear power plant according to an embodiment of the present disclosure;
FIG. 2 is a top view of a locking assembly of the device for fixing a rotor of a motor in a circulating seawater pump of a nuclear power plant according to an embodiment of the present disclosure;
FIG. 3 is a top view of a locking plate of the device for fixing the rotor of the motor in the circulating seawater pump of the nuclear power plant according to the embodiment of the present application;
FIG. 4 is a schematic cross-sectional view of a locking ring of an apparatus for fixing a rotor of a motor in a circulating seawater pump of a nuclear power plant according to an embodiment of the present disclosure;
FIG. 5 is a top view of a lock ring of an apparatus for securing a rotor of a motor in a circulating seawater pump of a nuclear power plant according to an embodiment of the present disclosure;
FIG. 6 is a schematic cross-sectional view of a locking plate of an apparatus for fixing a rotor of a motor in a circulating seawater pump of a nuclear power plant according to an embodiment of the present disclosure;
fig. 7 is a schematic cross-sectional view of a bearing bush in an apparatus for fixing a motor rotor in a circulating seawater pump of a nuclear power plant according to an embodiment of the present disclosure;
fig. 8 is a top view of a bearing pad in an apparatus for fixing a rotor of a motor in a circulating seawater pump of a nuclear power plant according to an embodiment of the present disclosure.
In the figure:
1-a bracket enclosure;
2-a rotor positioning assembly; 21-tile pillow, 211-bump, 212-first through hole, 213-second through hole; 22-a guide bearing; 23-tile sleeper fastening bolts;
3-a locking assembly; 31-locking ring, 311-inner hole; 32-locking plate, 321-arc, 322-sunken table top; 33-bolt through holes; 34-welding points; 35-locking assembly fastening bolts;
4-a motor rotor;
5-fastening bolt of bearing.
Detailed Description
In order to make the technical solutions in the embodiments of the present application more comprehensible to those skilled in the art, the following description will be made in detail and completely with reference to the accompanying drawings in the embodiments of the present application. It should be apparent that the embodiments described below are only some of the embodiments of the present application, and not all of them. All other embodiments that can be derived by a person skilled in the art from the embodiments described herein without inventive step are within the scope of the present application.
The inventor of the application discovers in research that abnormal sound and vibration are increased when the radial guide bearing on the upper part of the motor is in use for many times, and the locking device for the fastening bolt of the motor bearing needs to be provided for thoroughly solving the problem that the fastening bolt is not flexible because the left fastening bolt of the radial guide bearing on the lower part is broken and the right fastening bolt is not flexible.
Therefore, the embodiment of the application provides a device for fixing a motor rotor in a circulating seawater pump of a nuclear power station, the structure is simple, the installation is convenient, the locking assembly is tightly attached to the bearing fastening bolt, the fastening bolt is reduced to shake, the problem that the vibration of the motor is increased due to looseness of the bearing fastening bolt is effectively solved, and the normal operation of the seawater circulating pump is ensured.
Based on the above, in order to clearly and specifically explain the above advantages of the present application, the following description of the embodiments of the present application will be made with reference to the accompanying drawings.
Referring to fig. 1, the drawing is a schematic structural diagram of an apparatus for fixing a rotor of a motor in a circulating sea water pump of a nuclear power plant according to an embodiment of the present application.
The device for fixing the motor rotor in the circulating seawater pump of the nuclear power station provided by the embodiment of the application comprises: the device comprises a bracket surrounding barrel 1, a rotor positioning component 2 and a locking component 3;
the motor rotor 4 is positioned inside the bracket enclosure 1;
the rotor positioning assemblies 2 are multiple and are used for fixing the motor rotor 4 in the center of the inner part of the bracket enclosure 1;
the rotor positioning component 2 is fixed on the support surrounding barrel 1 through a bearing fastening bolt 5, and the head of the bearing fastening bolt 5 is locked and fixed with the support surrounding barrel 1 through a locking component 3.
In the embodiment of the application, the rotor positioning component 2 is fixed on the support surrounding cylinder 1 through the bearing fastening bolt 5, the head of the bearing fastening bolt 5 is locked and fixed with the support surrounding cylinder 1 through the locking component 3, the bearing fastening bolt 5 can be prevented from shaking, the problem that the vibration of the motor is enlarged due to looseness of the bearing fastening bolt is effectively solved, and the normal operation of the seawater circulating pump is ensured
In some possible implementations of the embodiment of the present application, as shown in fig. 1 and 2, the locking assembly 3 includes: a locking ring 31 and a locking plate 32;
the inner hole 311 of the locking ring 31 is matched with the head of the bearing fastening bolt 5 in shape and used for fixing the head of the bearing fastening bolt 5;
one end of the locking plate 32 is used to fix the locking ring 31; the other end of the locking plate 32 is provided with a bolt through hole 33 for fixing the locking plate 32 to the bracket skirt 1 with a locking assembly fastening bolt 35.
In one example, the locking plate 32 has an arc structure, and matches with the outer arc size of the bracket enclosure 1, so that the locking plate 32 can better fit with the bracket enclosure 1, and the contact area is increased, so that the locking plate is more stable.
In some possible implementations of the embodiment of the present application, as shown in fig. 2 and 3, one end of the locking plate 32 is a circular arc 321, and the circular arc 321 is fixed by at least one welding point 34 after being aligned with the outer circle of the locking ring 31.
In some possible implementations of the embodiments of the present application, as shown in fig. 2, 4 and 5, the inner hole 311 of the locking ring 31 is a hexagon socket hole, which is fitted with a hexagon socket of the head of the bearing fastening bolt 5, and each fitting surface cannot pass through the hole as checked by a 0.03mm feeler gauge.
It should be noted that, the locking ring 31 and the locking plate 32 are connected by spot welding, and have the characteristics of adapting to the position of the bearing fastening bolt 5 and reusing.
As an example, the bearing fastening bolts 6 are flange face bolts. It can be understood that the original bolt and locking gasket mode is replaced by a flange bolt, and the risk that the locking gasket fails to cause bolt looseness is avoided. Then, in one example, as shown in fig. 2, 4 and 5, the inner hole 311 is divided into a section fitted with the hexagonal head of the bearing fastening bolt 5 and a section fitted with the flange of the bearing fastening bolt 5.
In some possible implementations of the embodiments of the present application, as shown in fig. 1 and 6, one end of the locking plate 32 is provided with a recessed mesa 322 for receiving the flange of the bearing fastening bolt 5 when the inner side of the locking plate 32 abuts against the outer arc of the holder enclosure 1.
In some possible implementations of the embodiments of the present application, as shown in fig. 1, the rotor positioning assembly 2 includes: a bearing shoe 21 and a guide bearing 22;
the guide bearing 22 is of an arc-shaped structure, the radian of the inner side of the guide bearing 22 is matched with the outer side of the motor rotor 4, and the outer side of the guide bearing 22 is tightly attached to the inner side of the tile pillow 21;
the guide bearing 22 and the bearing bush 21 are fixed through a bearing bush fastening bolt 23;
the outer side of the tile sleeper 21 is tightly attached to the inner wall of the support surrounding tube 1 and is fixed with the support surrounding tube 1 through a bearing fastening bolt 5.
In a specific example, as shown in fig. 1 and 7, the tile pillow 21 is provided with a protrusion 211 on the outer side, and the protrusion 211 is closely attached to the inner wall of the bracket enclosure 1.
In a specific example of I, as shown in fig. 1, 7 and 8, the tile pillow 21 is provided with 4 first through holes 212 and 2 second through holes 213;
a first through hole 212 for fixing the tile pillow fastening bolt 23;
and a second through hole 213 for fixing the bearing fastening bolt 5.
The following describes in detail an installation method of the device for fixing a rotor of a motor in a seawater circulating pump of a nuclear power plant according to an embodiment of the present application, with reference to a specific example.
The installation method of the device for fixing the motor rotor in the circulating seawater pump of the nuclear power station provided by the embodiment of the application is as follows:
step 1: processing a locking ring 31 and a locking plate 32 which are components of the locking assembly 3, repairing and matching hexagonal matching surfaces of an inner hexagonal hole of the locking ring 31 and an outer hexagonal matching surface of a bearing fastening bolt 5, checking that the matching surfaces can not pass through by using a 0.03mm feeler gauge, and bending the locking plate 32 according to the size of an outer arc of the bracket enclosure 1;
step 2: adjusting the motor rotor 4 to the center of the bracket surrounding barrel 1;
and step 3: mounting the tile pillow 21 on the guide bearing 22, and fastening 4 tile pillow fastening bolts 23;
and 4, step 4: installing the assembled guide bearing 22 and the tile pillow 21 at the corresponding position between the motor rotor 4 and the bracket enclosure 1, aligning bolt holes, and installing two bearing fastening bolts 5;
and 5: adjusting the radial clearance between the guide bearing 22 and the motor rotor 4 to a standard value, and fastening two bearing fastening bolts 5 by using a torque wrench;
step 6: the locking ring 31 is fitted to the hexagon of the bearing fastening bolt 5;
and 7: aligning the circular arc 321 of the locking plate 32 with the outer circle of the locking ring 31, fixing the locking plate 32 on the bolt hole of the bracket surrounding barrel 1 by using a locking assembly fastening bolt 35, and bonding and fixing the locking plate 32 and the locking ring 31 by using glue;
and 8: integrally taking down the spot welding spots 34 from the locking plate 32 and the locking ring 31 and fixing to manufacture a locking assembly 3;
and step 9: the locking assembly 3 is mounted in place and the bolt 5 is tightened.
The present application has been described in detail with reference to the drawings and examples, but the present application is not limited to the above examples, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present application. The prior art can be used for all the matters not described in detail in this application.
Claims (10)
1. An apparatus for fixing a rotor of a motor in a circulating sea water pump of a nuclear power plant, the apparatus comprising: the device comprises a bracket surrounding cylinder, a rotor positioning assembly and a locking assembly;
the motor rotor is positioned inside the bracket enclosure;
the rotor positioning assemblies are multiple and are used for fixing the motor rotor in the center of the inner part of the bracket enclosure;
the rotor positioning assembly is fixed on the support surrounding barrel through a bearing fastening bolt, and the head of the bearing fastening bolt is locked and fixed with the support surrounding barrel through the locking assembly.
2. The apparatus as claimed in claim 1, wherein the locking assembly comprises: a locking ring and a locking plate;
the shape of the inner hole of the locking ring is matched with that of the head of the bearing fastening bolt, and the locking ring is used for fixing the head of the bearing fastening bolt;
one end of the locking plate is used for fixing the locking ring; and the other end of the locking plate is provided with a bolt through hole for fixing the locking plate on the support surrounding barrel.
3. The device for fixing the rotor of the motor in the circulating sea water pump of the nuclear power plant according to claim 2,
the locking plate is of an arc-shaped structure and is matched with the outer arc of the support surrounding cylinder in size.
4. The device for fixing the rotor of the motor in the circulating sea water pump of the nuclear power plant according to claim 2,
one end of the locking plate is arc-shaped, and the arc-shaped is aligned with the excircle of the locking ring and then fixed through at least one welding point.
5. The device for fixing the rotor of the motor in the circulating sea water pump of the nuclear power plant according to claim 2,
the inner hole of the locking ring is an inner hexagonal hole and is matched with an outer hexagonal hole at the head part of the bearing fastening bolt, and each matching surface cannot pass through the hole when being checked by a 0.03mm feeler gauge.
6. The device for fixing the rotor of the motor in the circulating sea water pump of the nuclear power plant according to claim 2,
the bearing fastening bolt is a flange bolt.
7. Device for fixing a rotor of an electric motor in a circulating sea water pump of a nuclear power plant according to claim 6,
and one end of the locking plate is provided with a sunken table top for accommodating a flange plate of the bearing fastening bolt when the inner side of the locking plate is tightly attached to the outer arc of the bracket enclosure.
8. The apparatus for fixing the rotor of the motor in the circulating seawater pump of a nuclear power plant according to any one of claims 1 to 7, wherein the rotor positioning assembly comprises: a bearing pad and a guide bearing;
the guide bearing is of an arc-shaped structure, the radian of the inner side of the guide bearing is matched with the outer side of the motor rotor, and the outer side of the guide bearing is tightly attached to the inner side of the bearing shell;
the guide bearing and the bearing bush are fixed through a bearing bush fastening bolt;
the outer side of the tile pillow is tightly attached to the inner wall of the support surrounding cylinder, and the tile pillow is fixed with the support surrounding cylinder through the bearing fastening bolt.
9. The device for fixing the rotor of the motor in the circulating sea water pump of the nuclear power plant according to claim 8,
the outer side of the tile pillow is provided with a bulge, and the bulge is tightly attached to the inner wall of the support surrounding cylinder.
10. The device for fixing the rotor of the motor in the circulating sea water pump of the nuclear power plant according to claim 8,
the tile pillow is provided with 4 first through holes and 2 second through holes;
the first through hole is used for fixing the tile sleeper fastening bolt;
the second through hole is used for fixing the bearing fastening bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122772284.4U CN216564698U (en) | 2021-11-12 | 2021-11-12 | Device for fixing motor rotor in circulating sea water pump of nuclear power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122772284.4U CN216564698U (en) | 2021-11-12 | 2021-11-12 | Device for fixing motor rotor in circulating sea water pump of nuclear power station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216564698U true CN216564698U (en) | 2022-05-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122772284.4U Active CN216564698U (en) | 2021-11-12 | 2021-11-12 | Device for fixing motor rotor in circulating sea water pump of nuclear power station |
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| CN (1) | CN216564698U (en) |
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- 2021-11-12 CN CN202122772284.4U patent/CN216564698U/en active Active
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