CN111637085B - Installation process of nuclear reactor coolant pump shaft sleeve - Google Patents
Installation process of nuclear reactor coolant pump shaft sleeve Download PDFInfo
- Publication number
- CN111637085B CN111637085B CN202010511621.1A CN202010511621A CN111637085B CN 111637085 B CN111637085 B CN 111637085B CN 202010511621 A CN202010511621 A CN 202010511621A CN 111637085 B CN111637085 B CN 111637085B
- Authority
- CN
- China
- Prior art keywords
- shaft sleeve
- nut
- shaft
- disc
- mounting disc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/043—Shafts
- F04D29/044—Arrangements for joining or assembling shafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/007—Details, component parts, or accessories especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/605—Mounting; Assembling; Disassembling specially adapted for liquid pumps
Abstract
The invention relates to a nuclear reactor coolant pump shaft sleeve installation process, which adopts a leveling installation disc, a long screw rod and a connecting nut to level and lift the whole shaft sleeve, adopts a guide tool to guide in the falling process of a bearing, ensures the position precision in the falling process of the shaft sleeve and prevents the shaft sleeve and a lower pump shaft from being scratched, uses the screw rod and the nut to do work on a compression disc after the shaft sleeve falls by a certain depth, ensures that the shaft sleeve is smoothly assembled at the shaft shoulder position of the lower pump shaft after falling, and thus completes the smooth installation and positioning of the shaft sleeve. The invention solves the problems that the shaft sleeve of the nuclear main pump shakes during the installation process, two workpieces cannot be concentric, the sight line is shielded and cannot be accurately positioned, and the grinding damage occurs during the assembly process, and can also be applied to the field of installation processes of other long-tube thin-wall parts and the like.
Description
The technical field is as follows:
the invention relates to a shaft sleeve mounting process of a nuclear reactor coolant pump.
Background art:
the shaft sleeve is a reactor main pump nuclear first-level component, and the shaft sleeve is a special long-cylinder thin-wall part with the length of 1200mm and the wall thickness of 14 mm. The whole shafting part is positioned in the sealing body, and the rotating speed is 1486 rpm under the normal operation state of the main pump. The shaft sleeve also plays a supporting role for the water guide bearing, the water temperature in the sealing chamber is as high as 293 ℃ when the main pump operates, and the shaft sleeve is arranged on the lower pump shaft to play a role in protecting and insulating the lower pump shaft. As the cylindricity of the shaft sleeve is 0.01mm, the full run-out of the excircle is 0.02mm, the coaxiality between the inner circles is 0.01mm, the theoretical clearance between the lower pump shaft and the lower pump shaft is 0.02-0.05mm, the clearance between the lower pump shaft and the water guide bearing is 0.14mm, and the shaft sleeve is a typical part with a long cylinder and a thin wall which is easy to deform, the lower pump shaft is positioned in a cavity of the sealing chamber, the shaft sleeve needs to be installed at the bottom of the lower pump shaft, and the sight lines are completely shielded in the installation and falling process as shown in figure 1, so that. The following two possibilities of injury can occur if the bushing is not properly installed.
Firstly, the method comprises the following steps: if the shaft sleeve generates radial movement deviation in the falling process of installation, abrasion can be generated between the shaft sleeve and the lower pump shaft, so that the shaft sleeve is deformed and scrapped, and the chromium-plated surface of the lower pump shaft falls off.
Secondly, the method comprises the following steps: if the shaft sleeve is not correctly positioned at the lower pump shaft, the shaft sleeve can fall off to damage the water guide bearing due to high speed in the running process of the main pump.
At present, the coolant main pump of the nuclear reactor is not manufactured in China, no experience can be used for reference, and people are required to continuously search and research to invent a set of reasonable shaft sleeve installation process. Because the shaft sleeve, the lower pump shaft and the water guide bearing are all positioned in the cavity of the sealing chamber, the sight of an operator is shielded; the matching surface of the lower pump shaft and the shaft sleeve is a chromium plating area, the gap is only 0.02-0.05mm, as shown in figure 1, the gap between the water guide bearing and the shaft sleeve is only 0.14mm, and the inner surface material of the lower guide bearing is softer, so a reasonable assembly process must be formulated to ensure the coaxiality of the lower pump shaft, the shaft sleeve and the water guide bearing, meet the assembly gap between the shaft sleeve and the lower pump and the assembly gap between the shaft sleeve and the water guide bearing, and avoid the occurrence of collision and damage on the chromium plating surface of the lower pump shaft, the working surface of the shaft sleeve and the inner surface of the water guide bearing.
The invention content is as follows:
the invention aims to provide a nuclear reactor coolant pump shaft sleeve mounting process, which ensures the service lives of a shaft sleeve, a lower pump shaft and a water guide bearing. The technical scheme of the invention is as follows: the utility model provides a nuclear reactor coolant pump axle sleeve installation technology, adopt mounting disc (6), long screw rod (2), axle sleeve (11) is connected to first nut (1), first nut (1) makes the levelness of axle sleeve reach 0.02mm/m, start overhead traveling crane hoist and mount mounting disc (6) and make axle sleeve (11) fall, mounting disc (6), axle sleeve (11) fall in-process adopts direction instrument (7) direction and protection, after 1856mm falls in the axle sleeve, do work to compressing disc (3) through short screw rod (4), second nut (5), compressing disc (3) and mounting disc (6) cooperate drive mounting disc (6) and axle sleeve (11) through the tang and move downwards, in order to reach the accurate location and the installation of axle sleeve (11), above-mentioned method includes the following steps:
1) the M12 long screw rod (2) is screwed into the shaft sleeve (11);
2) the first nut (1) is arranged on the long screw rod (2);
3) the mounting disc (6) penetrates through the long screw (2) and is screwed down by adopting a first nut (1);
4) the lockset and the hanging strip pass through a lifting lug of the mounting plate (6), and the hanging strip is hung on a lifting hook of the overhead travelling crane;
5) the levelness of the shaft sleeve (11) reaches 0.02mm/m by adjusting the position of the first nut (1) on the long screw (2);
6) installing a guide tool (7) to enable the guide tool (7) to be positioned at the shaft shoulder of the lower pump shaft (8);
7) starting the crown block to enable the shaft sleeve (11) and the mounting disc (6) to integrally and vertically fall;
8) after the shaft sleeve falls 1856mm, a pressing disc (3) and a second nut (5) of a short screw (4) are arranged on a lower pump shaft (8) and the pressing disc (3) is pressed on the mounting disc (6);
9) and manually screwing the second nut (5) to enable the mounting disc (6) and the shaft sleeve (11) to integrally move downwards until the shaft sleeve (11) is smoothly mounted on the shaft shoulder of the lower pump shaft (8) through the positioning key (10).
In the step 5), the two long screw rods (2) and the 4 first nuts (1) are uniformly distributed on the mounting disc, and when the height of the nuts is adjusted, the horizontal precision of the mounting disc and the horizontal precision of the shaft sleeve are measured horizontally.
The hardness of the material of the guide tool used in the step 6) is less than that of the lower pump shaft and the shaft sleeve, and the guide tool cannot be displaced in the installation process.
And 9), the fit clearance between the pressing disc and the mounting disc is required to be less than 0.03mm, and the manual nut screwing process needs to be carried out slowly until the shaft sleeve can be smoothly put in place.
The technical effects are as follows:
the invention levels the shaft sleeve through the mounting disc, the long screw rod and the nut, guides and protects the shaft sleeve through the guide tool in the falling process of the shaft sleeve, ensures the coaxiality requirement among the shaft sleeve, the lower pump shaft and the water guide bearing in the installation process of the bearing, solves the technical problems that the parts are installed in the cavity, the sight line is completely shielded in the falling process, the levelness of the parts in the falling process of the parts and the coaxiality of the two parts cannot be ensured, and the like,
according to the invention, the short screw rod and the nut apply work to the compression disc, the compression disc drives the mounting disc, the long screw rod and the nut shaft sleeve to integrally move downwards, and the shaft sleeve is stopped at the shaft shoulder position where the lower guide pump shaft is smoothly and accurately mounted. The invention solves the technical problem that the part cannot be accurately positioned under the self gravity after falling to a certain depth.
The hardness of the material of the guide tool is less than that of the lower pump shaft and the shaft sleeve, the guide tool cannot displace in the installation process, the coaxiality of the shaft sleeve in the installation process is guaranteed, the shaft sleeve is prevented from shaking in the falling process, and the chromium-plated surface of the lower pump shaft is protected.
According to the invention, the two long screws and the 4 nuts are uniformly distributed on the mounting disc, and the horizontal precision of the shaft sleeve is 0.02mm/m by adjusting the height of the nuts. The long screw, the nut and the mounting disc can also be applied to the mounting field of other leveling parts needing to be hoisted.
The invention ensures the coaxiality of the shaft sleeve, the lower pump shaft and the water guide bearing in the falling process of the shaft sleeve, and effectively protects the working surface of the shaft sleeve, the working surface of the water guide bearing and the chromium-plated surface of the lower pump shaft. The shaft sleeve is prevented from being abraded with other parts in the falling process, and the method has important significance for controlling indirect secondary damage and abrasion of products. The service life of the shaft sleeve, the lower pump shaft and the water guide bearing is ensured. The assembly process is already applied to the installation of a plurality of nuclear reactor coolant pump products, has good practical effect and achieves the expected effect of nuclear power main pump installation.
Description of the drawings:
FIG. 1 is a sectional view of a shaft sleeve mounting structure of a nuclear reactor coolant pump
The specific implementation mode is as follows:
as shown in fig. 1, a nuclear reactor coolant pump shaft sleeve installation process adopts a mounting plate 6, a long screw 2 and a first nut 1 to connect a shaft sleeve 11, adjusts the first nut 1 to enable the levelness of the shaft sleeve to reach 0.02mm/m, starts a crown block to hoist the mounting plate 6 to enable the shaft sleeve 11 to fall, and adopts a guiding tool 7 to guide and protect the mounting plate 6 and the shaft sleeve 11 in the falling process, after the shaft sleeve falls to 1856mm, the short screw 4 and a second nut 5 work on a compression disc 3, and the compression disc 3 and the mounting plate 6 drive the mounting plate 6 and the shaft sleeve 11 to move downwards through the matching of a spigot so as to achieve accurate positioning and installation of the shaft sleeve 11, and the method comprises the following steps:
1) the M12 long screw rod 2 is screwed into the shaft sleeve 11;
2) the first nut 1 is installed on the long screw rod 2;
3) the mounting plate 6 penetrates through the long screw 2 and is screwed by the first nut 1;
4) the lockset and the hanging strip pass through the lifting eye of the mounting plate 6, and the hanging strip is hung on the lifting hook of the overhead travelling crane;
5) the levelness of the shaft sleeve 11 reaches 0.02mm/m by adjusting the position of the first nut 1 on the long screw rod 2;
6) installing the guide tool 7 to enable the guide tool 7 to be positioned at the shaft shoulder of the lower pump shaft 8;
7) starting the crown block to enable the shaft sleeve 11 and the mounting plate 6 to integrally and vertically fall;
8) after the shaft sleeve falls 1856mm, the pressing disc 3 and the second nut 5 of the short screw 4 are installed on the lower pump shaft 8, and the pressing disc 3 is pressed on the installation disc 6;
9) the second nut 5 is screwed down manually, so that the mounting disc 6 and the shaft sleeve 11 integrally move downwards until the shaft sleeve 11 is smoothly mounted on the shaft shoulder of the lower pump shaft 8 through the positioning key 10.
In the step 5), the two long screws 2 and the 4 first nuts 1 are uniformly distributed on the mounting disc, and the levelness of the mounting disc and the shaft sleeve must be measured by using a level meter when the height of the nuts is adjusted.
The hardness of the material of the guide tool used in the step 6) is less than that of the lower pump shaft and the shaft sleeve, and the guide tool cannot be displaced in the installation process.
And 9), the fit clearance between the pressing disc and the mounting disc is required to be less than 0.03mm, and the manual nut screwing process needs to be carried out slowly until the shaft sleeve can be smoothly put in place.
Claims (4)
1. A nuclear reactor coolant pump shaft sleeve installation process is characterized in that: adopt mounting disc (6), long screw (2), first nut (1) connecting axle sleeve (11), adjust first nut (1) and make the levelness of axle sleeve reach 0.02mm/m, start overhead traveling crane hoist and mount mounting disc (6) and make axle sleeve (11) whereabouts, mounting disc (6), axle sleeve (11) whereabouts in-process adopts direction instrument (7) direction and protection, after axle sleeve whereabouts 1856mm, through short screw (4), second nut (5) do work to compressing tightly disc (3), compress tightly disc (3) and mounting disc (6) and drive mounting disc (6) and axle sleeve (11) through the tang cooperation and move down, in order to reach the accurate location and the installation of axle sleeve (11), above-mentioned method includes the following steps:
1) the M12 long screw rod (2) is screwed into the shaft sleeve (11);
2) the first nut (1) is arranged on the long screw rod (2);
3) the mounting disc (6) penetrates through the long screw (2) and is screwed down by adopting a first nut (1);
4) the lockset and the hanging strip pass through a lifting lug of the mounting plate (6), and the hanging strip is hung on a lifting hook of the overhead travelling crane;
5) the levelness of the shaft sleeve (11) reaches 0.02mm/m by adjusting the position of the first nut (1) on the long screw (2);
6) installing a guide tool (7) to enable the guide tool (7) to be positioned at the shaft shoulder of the lower pump shaft (8);
7) starting the crown block to enable the shaft sleeve (11) and the mounting disc (6) to integrally and vertically fall;
8) after the shaft sleeve falls 1856mm, a pressing disc (3) and a second nut (5) of a short screw (4) are arranged on a lower pump shaft (8) and the pressing disc (3) is pressed on the mounting disc (6);
9) and manually screwing the second nut (5) to enable the mounting disc (6) and the shaft sleeve (11) to integrally move downwards until the shaft sleeve (11) is smoothly mounted on the shaft shoulder of the lower pump shaft (8) through the positioning key (10).
2. The mounting process of a nuclear reactor coolant pump shaft sleeve as claimed in claim 1, wherein: in the step 5), the two long screws (2) and the 4 first nuts (1) are uniformly distributed on the mounting disc, and the levelness of the mounting disc and the shaft sleeve must be measured by using a level meter when the height of the nuts is adjusted.
3. The mounting process of a nuclear reactor coolant pump shaft sleeve as claimed in claim 1, wherein: the hardness of the material of the guide tool used in the step 6) is less than that of the lower pump shaft and the shaft sleeve, and the guide tool cannot be displaced in the installation process.
4. The mounting process of a nuclear reactor coolant pump shaft sleeve as claimed in claim 1, wherein: and 9), the fit clearance between the pressing disc and the mounting disc is required to be less than 0.03mm, and the manual nut screwing process needs to be carried out slowly until the shaft sleeve can be smoothly put in place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010511621.1A CN111637085B (en) | 2020-06-08 | 2020-06-08 | Installation process of nuclear reactor coolant pump shaft sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010511621.1A CN111637085B (en) | 2020-06-08 | 2020-06-08 | Installation process of nuclear reactor coolant pump shaft sleeve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111637085A CN111637085A (en) | 2020-09-08 |
| CN111637085B true CN111637085B (en) | 2021-06-15 |
Family
ID=72327689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010511621.1A Active CN111637085B (en) | 2020-06-08 | 2020-06-08 | Installation process of nuclear reactor coolant pump shaft sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111637085B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113526323B (en) * | 2021-07-02 | 2022-04-08 | 哈尔滨电气动力装备有限公司 | Nuclear main pump multi-component combined hoisting method |
| CN113400246B (en) * | 2021-07-14 | 2022-10-11 | 哈尔滨电气动力装备有限公司 | Installation and disassembly process of lower guide bearing fixing ring of main shaft seal pump of nuclear power station |
| CN114412838B (en) * | 2021-12-15 | 2023-12-01 | 西安航天泵业有限公司 | Ethylene device low-temperature cylindrical bag pump assembly method |
| CN114378567A (en) * | 2021-12-17 | 2022-04-22 | 哈尔滨电气动力装备有限公司 | Nuclear main pump bearing guide ring installation process |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3093269A (en) * | 1961-01-23 | 1963-06-11 | Conch Int Methane Ltd | Dispensing means having liquid storage tank and liquid removal means |
| JP5863321B2 (en) * | 2011-08-08 | 2016-02-16 | 三菱重工コンプレッサ株式会社 | Rotating machine jig and method of transporting rotating machine |
| US9957977B1 (en) * | 2015-11-02 | 2018-05-01 | Global Marine, Inc. | Impeller installation tool |
| CN205383116U (en) * | 2016-03-15 | 2016-07-13 | 山东钢铁股份有限公司 | Switch board fan bearing dismounting device |
| CN106089790B (en) * | 2016-07-20 | 2018-06-22 | 哈尔滨电气动力装备有限公司 | Pump shaft and lower half a coupler symmetric double key fit key technique under core main pump |
| CN108724060B (en) * | 2017-11-13 | 2023-10-20 | 江苏核电有限公司 | Mechanical seal maintenance support for reactor coolant pump and application method of mechanical seal maintenance support |
-
2020
- 2020-06-08 CN CN202010511621.1A patent/CN111637085B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN111637085A (en) | 2020-09-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111637085B (en) | Installation process of nuclear reactor coolant pump shaft sleeve | |
| CN103624555B (en) | Static pressure heavy-load directly drives high-precision rotary working-table | |
| CN111975290B (en) | Nuclear power main pump impeller mounting process | |
| CN210877671U (en) | Multi-angle drilling machine tool for machining flange | |
| CN111015445A (en) | Box-type structure elevator traction sheave processing equipment and processing method thereof | |
| CN209387185U (en) | A kind of moment of torsion control tightening nut device | |
| CN103464835B (en) | Efficient Workpiece tapping machine | |
| CN202278362U (en) | Assembling tool of adjustable shaft workpiece | |
| CN214185293U (en) | Fine processing is with screw mesopore boring bar | |
| CN210678057U (en) | Centerless grinding machine with trimming mechanism | |
| CN211027560U (en) | Friction liner processing die for steel cable machine | |
| CN207864233U (en) | A kind of adjustment of pump group concentricity and holding meanss | |
| CN105458104A (en) | Steel bottle necking machine | |
| CN213470284U (en) | Rotary assembly for maintenance door machine | |
| CN210998145U (en) | Numerical control vertical mill head | |
| CN206253959U (en) | A kind of nitrogen balance device for principal spindle of machine tool | |
| CN215745781U (en) | A liftout mechanism for spinning-lathe | |
| CN217317671U (en) | Rotation stopping positioning mechanism | |
| CN220240963U (en) | Automatic nonmetallic carrier roller processing production device | |
| CN219075979U (en) | Embryo pressing machine | |
| CN210649379U (en) | Stroke adjusting device of railway bearing fitting assembling machine | |
| CN114104909B (en) | Friction wheel pad structure and steel wire rope tension monitoring mechanism | |
| CN214840028U (en) | Tool for automatically and quantitatively filling lubricating grease into slewing bearing | |
| CN212145762U (en) | Automatic deburring device capable of realizing real-time continuous compensation | |
| CN219112787U (en) | Forging die for ball forging of ball valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |