CN114309739B - Processing technology of thrust tile base of shielding motor - Google Patents
Processing technology of thrust tile base of shielding motor Download PDFInfo
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- CN114309739B CN114309739B CN202111544480.4A CN202111544480A CN114309739B CN 114309739 B CN114309739 B CN 114309739B CN 202111544480 A CN202111544480 A CN 202111544480A CN 114309739 B CN114309739 B CN 114309739B
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Abstract
The invention relates to a processing technology of a thrust tile base of a shielding motor, which adopts a positioning tool to position and clamp the thrust tile base, processes a plane on one side, adjusts the position of the thrust tile base after processing the plane on one side, relocates the clamping tool position, processes the plane on the other side, and realizes the processing of the space angle and the size of the thrust tile base on the same clamping mould. The invention can realize the processing of the thrust tile base on the same positioning fixture, ensure the angular dimension and tolerance required by the drawing, avoid the subsequent assembly problem caused by the incapability of measuring the space dimension, and simultaneously eliminate the alignment problem caused by the incapability of mounting the fixture.
Description
Technical Field
The invention relates to a processing technology of a thrust tile base of a shielding motor.
Background
With the continuous improvement of the safety of nuclear power plants, a loop reactor coolant pump is required to be maintenance-free, leak-free and long in service life, and a shielding motor with the characteristics is widely used. In order to achieve the above purpose, the service life of the bearing of the domestic canned motor product is designed from original thousands of hours to tens of thousands of hours or even higher running time, the water film establishment is the basis of reliable bearing operation, which requires higher manufacturing precision and more accurate indexing, and the thrust bearing serving as support plays a key role in the bearing, so the thrust bearing manufacture is the key of canned motor bearing manufacture, the processing and indexing of the thrust bearing base are definitely high points which cannot be wound in order to improve the precision of the thrust bearing, the traditional processing mode adopts an integral processing disc, then the milling machine, linear cutting and other equipment processes joint surfaces according to the scribing reference, the processing can cause inaccurate indexing due to the influence of cutting force, different bearing capacity of each tile, and finally unstable rotor operation on the bearing, thereby causing the vibration increase of the main pump motor and reducing the service life. Aiming at the current situation, a new process is urgently needed to make up the problems of the traditional processing process,
disclosure of Invention
The invention relates to a processing technology of a thrust tile base of a shielding motor, which realizes that 8 thrust tile bases are processed on the same positioning mould, ensures the straightness of joint surfaces, ensures that the graduations of each tile are the same, eliminates the different influences of the bearing capacity of a thrust bearing caused by different graduations, and improves the service life of the bearing even the whole operation. The scheme of the invention is as follows: a processing technology of a thrust tile base of a shielding motor comprises the following steps:
a) Cleaning the thrust tile base (6), and checking the surface state without collision damage;
b) Placing the thrust tile base (6) on the base plate (1), and positioning the pin hole position of the thrust tile base (6) by adopting a positioning pin (9);
c) Two fixing pins (7) are screwed into the base plate (1), the fixing pins (7) are in contact with the tile base (6), and a set screw (8) is screwed into the fixing pins (7);
d) The position of the thrust tile base (6) is adjusted by a set screw (8), so that the length of the thrust tile base (6) extending out of the edge part of the foundation plate (1) is consistent before and after, and the set screw (8) is fastened;
e) The pressing plate (4) is placed on the surface of the thrust tile base (6) and is fixed by the bolts (5), so that the surface of the thrust tile base (6) is not damaged;
f) Placing a base plate (1) provided with a thrust tile base (6) on a milling machine workbench, taking the side surface of the base plate (1) as a reference, measuring the plane runout value of one side of the thrust tile base (6) by using a dial indicator to be within 0.02mm, and fixing the base plate on the milling machine workbench by using a sliding block (2) and a screw (3);
g) The side surface of the foundation plate (1) is used as a machining reference, the side surface of the thrust tile base (6) is machined, and when the clearance between the foundation plate (1) and the cutter is adjusted to be 0.5mm, the side surface of the thrust tile base (6) is machined;
h) After a plane on one side of the thrust tile base (6) is machined, adjusting the position of the thrust tile base 6, outwards assembling the plane on the other side of the thrust tile base 6 according to the modes of a), b), c), d), e) and f), and machining the plane on the other side of the thrust tile base (6) according to the step g);
i) And (3) sequentially processing 8 thrust tile bases (6) according to the modes of a), b), c), d), e), f), g) and h).
According to the invention, the aims of horizontal straightness of the side surface of the thrust tile base and accurate indexing of the sector blocks are achieved by changing the conventional processing mode of the thrust tile base, and the assembling requirement of the thrust tile base is met, so that the effect of stable and reliable operation of the shielding motor is achieved. The traditional processing mode utilizes the whole piece of processing to process the two side surfaces by scribing, which can lead to uneven indexing of the sector thrust tile base, if the processing is simply performed by a numerical control milling machine, after one side is aligned and processed, the other side processing surface can not be positioned and aligned, scribing is also required, and the error is very large; the invention has the advantages that the requirements on the shielding motor are higher, the motor is safe and reliable, maintenance is free, the operation is stable, the vibration and noise reduction become the main operation index of the shielding motor, the bearing is critical to achieve the effects, especially the thrust shoe base is more critical to bearing the rotor to stably operate, so the thrust shoe base processed by the invention can ensure the side straightness level of each thrust shoe base, the fan-shaped angles are consistent, the clamping aspect is quick, the manufacturing efficiency is improved, and if the bottom plate is processed to be large enough, a plurality of thrust shoe bases can be clamped at one time, and the aim of mass production of the assembly line can be realized. Moreover, the thrust shoe base processed by the invention ensures that the bearing capacity of each shoe base is consistent after assembly, the linear centrifugal force problem caused by eccentric operation cannot occur during operation, moreover, the thrust shoe base processed by the invention can ensure that the gap of each shoe is consistent after processing, the water film is uniformly established, and the water film oscillation caused by uneven gap is avoided, thereby reducing the operation vibration and noise of the shielding motor, improving the operation reliability of the shielding motor, achieving the purposes of damping and noise reduction of the shielding motor, and realizing maintenance-free, safe and reliable operation
In view of the technical scheme, the process method for realizing the integrated processing of the two side surfaces of the thrust tile base by utilizing the positioning clamping fixture on the milling machine is adopted, the tool design and adjustment are carried out, the simulation part is used for verification, the final dimension measurement is carried out, and then the process for determining the integrated processing of the two side surfaces of the new thrust tile base is fuzzed, namely, the positioning clamping fixture is adopted to align and fix the positioning clamping fixture on a workbench, so that the thrust tile base processed by the method can ensure the straightness level of the side surface of each thrust tile base, the fan-shaped angles are consistent, the clamping aspect is quick, the manufacturing efficiency is improved, if the bottom plate is processed to be large enough, a plurality of thrust tile bases can be clamped at one time, the aim of mass production of a production line can be fulfilled, and the process refinement is carried out on the simulation part basis according to the actual dimension and the dimension requirement of the product thrust tile base, so that a complete set of the processing process method of the thrust tile base of the shielding motor is assembled to guide the production. The processing technology of the thrust tile base of the shielding motor is verified on simulation pieces with similar sizes, and is applied to a plurality of products, so that the use effect is good, and the expected effect of the products is achieved.
The invention adopts the special positioning mould, and the processing is performed under the same working condition by a positioning reference, so that the processing efficiency is improved, and the accurate indexing of the thrust tile base is ensured, thereby ensuring the same bearing capacity of each thrust tile, prolonging the running service life of the bearing, reducing the running vibration and further improving the running time of the whole machine. In order to ensure the manufacturing precision of the thrust bearing of the canned motor, a new canned motor thrust tile base processing technology is required.
Drawings
FIG. 1 is a schematic drawing of the left side tooling of a thrust tile base.
FIG. 2 is a cross-sectional view of FIG. 1 A-A
FIG. 3 is a sectional view of the B-B of FIG. 2
FIG. 4 thrust tile base right side machining schematic
FIG. 5 is a cross-sectional view of the C-C section of FIG. 4
Wherein: the base plate 1, the sliding block 2, the screw 3, the pressing plate 4, the bolt 5, the thrust tile base 6, the fixed pin 7, the set screw 8 and the positioning pin 9.
Detailed Description
A processing technology of a thrust tile base of a shielding motor comprises the following steps:
a) Cleaning the thrust tile base 6, and checking the surface state without collision damage;
b) As shown in fig. 1, a thrust tile base 6 is placed on a base plate 1, and a positioning pin 9 is used for positioning the pin hole position of the thrust tile base 6;
c) Two fixing pins 7 are screwed into the base plate 1, the fixing pins 7 are in contact with the tile base 6, and a set screw 8 is screwed into the fixing pins 7;
d) The position of the thrust tile base 6 is adjusted by a set screw 8, so that the length of the thrust tile base 6 extending out of the edge part of the foundation plate 1 is consistent before and after the thrust tile base is fastened by the set screw 8;
e) As shown in fig. 2, the pressing plate 4 is placed on the surface of the thrust tile base 6 and is fixed by the bolts 5, so that the surface of the thrust tile base 6 is not damaged;
f) Placing the base plate 1 assembled with the thrust tile base 6 on a milling machine workbench, taking the side surface of the base plate 1 as a reference, measuring the plane runout value of one side of the thrust tile base 6 by using a dial indicator to be within 0.02mm, and fixing the base plate on the milling machine workbench by using a sliding block 2 and a screw 3 as shown in figure 3;
g) The side surface of the foundation plate 1 is used as a processing reference, the side surface of the thrust tile base 6 is processed, and when the clearance between the foundation plate 1 and the cutter is adjusted to be 0.5mm, the side surface of the thrust tile base 6 is processed;
h) After the plane of one side of the thrust tile base 6 is processed, as shown in fig. 4 and 5, the position of the thrust tile base 6 is adjusted, the plane of the other side of the thrust tile base 6 is outwards assembled according to the modes of a), b), c), d), e) and f), and the plane of the other side of the thrust tile base (6) is processed according to the step g);
i) 8 pieces of thrust tile base 6 are sequentially processed according to the modes of a), b), c), d), e), f), g) and h).
Claims (1)
1. A processing technology of a thrust tile base of a shielding motor is characterized by comprising the following steps:
a) Cleaning the thrust tile base (6), and checking the surface state without collision damage;
b) Placing the thrust tile base (6) on the base plate (1), and positioning the pin hole position of the thrust tile base (6) by adopting a positioning pin (9);
c) Two fixing pins (7) are screwed into the base plate (1), the fixing pins (7) are in contact with the tile base (6), and a set screw (8) is screwed into the fixing pins (7);
d) The position of the thrust tile base (6) is adjusted by a set screw (8), so that the length of the thrust tile base (6) extending out of the edge part of the foundation plate (1) is consistent before and after, and the set screw (8) is fastened;
e) The pressing plate (4) is placed on the surface of the thrust tile base (6) and is fixed by the bolts (5), so that the surface of the thrust tile base (6) is not damaged;
f) Placing a base plate (1) provided with a thrust tile base (6) on a milling machine workbench, taking the side surface of the base plate (1) as a reference, measuring the plane runout value of one side of the thrust tile base (6) by using a dial indicator to be within 0.02mm, and fixing the base plate on the milling machine workbench by using a sliding block (2) and a screw (3);
g) The side surface of the foundation plate (1) is used as a machining reference, the side surface of the thrust tile base (6) is machined, and when the clearance between the foundation plate (1) and the cutter is adjusted to be 0.5mm, the side surface of the thrust tile base (6) is machined;
h) After a plane on one side of the thrust tile base (6) is processed, adjusting the position of the thrust tile base (6), and assembling the other side plane of the thrust tile base (6) outwards according to the modes of a), b), c), d), e) and f), and processing the other side plane of the thrust tile base (6) according to the mode of the step g);
i) And (3) sequentially processing 8 thrust tile bases (6) according to the modes of a), b), c), d), e), f), g) and h).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111544480.4A CN114309739B (en) | 2021-12-16 | 2021-12-16 | Processing technology of thrust tile base of shielding motor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111544480.4A CN114309739B (en) | 2021-12-16 | 2021-12-16 | Processing technology of thrust tile base of shielding motor |
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| CN114309739A CN114309739A (en) | 2022-04-12 |
| CN114309739B true CN114309739B (en) | 2023-09-29 |
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| CN114309739A (en) | 2022-04-12 |
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