CN214445999U - Nuclear power station circulating pump gear box coupling assembling tool - Google Patents
Nuclear power station circulating pump gear box coupling assembling tool Download PDFInfo
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- CN214445999U CN214445999U CN202023144935.7U CN202023144935U CN214445999U CN 214445999 U CN214445999 U CN 214445999U CN 202023144935 U CN202023144935 U CN 202023144935U CN 214445999 U CN214445999 U CN 214445999U
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Abstract
The utility model belongs to the technical field of nuclear power maintenance, concretely relates to nuclear power station circulating pump gear box shaft coupling assembling tool and method, assembling tool for assemble gear box axle and shaft coupling, including last backplate, nut A, screw rod, jack, lower backplate, nut B. The assembling method comprises the following steps: step 1: conveying the coupler to the position right below the gear box shaft, screwing one ends of the four screw rods into bolt holes in the head of the gear box shaft after passing through shaft holes of the coupler, and screwing the four screw rods; step 2: an upper guard plate is arranged at the lower part of the coupler, so that four screw rods respectively penetrate through the strip holes of the upper guard plate and are fixed by four nuts A; and step 3: the inner spline of the coupler is just matched with the outer spline of the gearbox shaft by rotating the coupler. The utility model discloses assembly tool and method have effectively solved the equipment difficult problem of the high-accuracy part of circulating pump gear box shaft coupling, have reduced demand and work load to the manpower, have reduced safe risk.
Description
Technical Field
The utility model belongs to the technical field of the nuclear power maintenance, concretely relates to nuclear power station circulating pump gear box shaft coupling assembling tool.
Background
The function of the circulating water system is to supply the necessary amount of cooling water to the condenser of the steam turbine and the heat exchanger of the conventional island auxiliary cooling water system during the operation of the nuclear power plant. The circulating water system seawater circulating pump is a main active device of the circulating water system, and has the function of pressurizing cooling medium seawater and then conveying the pressurized cooling medium seawater to a condenser. The concrete volute pump belongs to large-scale equipment, and in the existing domestic nuclear power station, each unit is generally provided with 2-3 circulating water pumps which work simultaneously, and the pump for equipment is not used. Therefore, the stable and reliable operation of the pump is very important to the economy and the safety of the nuclear power station.
The circulating pump gear box is a device for converting the high rotating speed of the motor into the low rotating speed required by the pump, and plays a role of a pivot. Because the shaft coupling of gear box adopts upper and lower part interference fit, the centre has the spline to connect, need consume a large amount of manpower and materials in the equipment process. Meanwhile, due to the fact that the spline is in interference fit, high precision is needed in the assembling process, and the existing assembling conditions cannot meet the requirements.
Therefore, the design of an assembling tool and a method are needed to realize high-precision assembling of the coupling of the nuclear power station circulating pump gearbox.
Disclosure of Invention
An object of the utility model is to provide a nuclear power station circulating pump gear box shaft coupling assembling tool to improve the precision and the reliability of equipment nuclear power station circulating pump gear box shaft coupling.
The technical scheme of the utility model as follows:
a nuclear power station circulating pump gear box coupler assembling tool is used for assembling a gear box shaft and a coupler and comprises an upper protection plate, a nut A, a screw, a jack, a lower protection plate and a nut B;
the upper guard plate is of a circular plate structure, a circular groove is machined in the center of the lower surface of the upper guard plate, and N through holes are formed in the outer side of the circular groove at equal intervals along the circumferential direction, wherein N is more than or equal to 3;
the upper edge of the upper protection plate is clamped in the spigot of the coupler;
the lower guard plate is of a circular plate structure, a circular groove is machined in the center of the upper surface of the lower guard plate, and N through holes are machined in the outer side of the circular groove at equal intervals along the circumferential direction;
the jack is arranged between the circular groove of the upper guard plate and the circular groove of the lower guard plate;
the number of the screw rods is N, one end of each screw rod extends out of the through hole of the upper protection plate, passes through the shaft hole of the coupler and then is screwed into the bolt hole at the head part of the shaft of the gear box, and the other end of each screw rod penetrates through the through hole of the lower protection plate;
a nut A is arranged on the screw rod below the upper protection plate to fix the upper protection plate;
and a nut B is arranged on the screw rod below the lower protective plate to fix the lower protective plate and further support the jack, and the upper protective plate slowly and stably moves upwards through the jacking jack.
Preferably, the outer side of the circular groove on the lower surface of the upper protection plate is provided with N strip holes and N through holes in a crossed manner at equal intervals along the circumferential direction.
Preferably, N ═ 4.
Preferably, a sleeve is sleeved on the screw rod between the upper protection plate and the nut A to avoid damaging the lower surface of the upper protection plate in the process of rotating the nut A, and meanwhile, the operation space is extended to the lower part of the coupler to facilitate the rotation of the nut A.
Preferably, the screws are all through-wire bolts.
Preferably, the size of the circular groove on the upper protection plate is consistent with the size of the jacking component of the jack, and the size of the circular groove on the lower protection plate is consistent with the size of the base of the jack.
The utility model provides a nuclear power station circulating pump gear box shaft coupling assembling method, uses the assembly tool.
A nuclear power station circulating pump gear box coupling assembling method comprises the following steps:
step 1: conveying the coupler to the position right below the gear box shaft, screwing one ends of the four screw rods into bolt holes in the head of the gear box shaft after passing through shaft holes of the coupler, and screwing the four screw rods;
step 2: an upper guard plate is arranged at the lower part of the coupler, so that four screw rods respectively penetrate through the strip holes of the upper guard plate and are fixed by four nuts A;
simultaneously rotating the four nuts A to enable the coupler to slowly move upwards until the top end of an internal spline on the coupler is contacted with the bottom end of an external spline of the gearbox shaft;
and step 3: the inner spline of the coupler is just matched with the outer spline of the gearbox shaft by rotating the coupler;
continuously rotating the four nuts A to enable the coupler to continuously and slowly move upwards until the matching surface of the coupler is contacted with the matching surface of the gearbox shaft, and stopping rotating the nuts A;
and 4, step 4: one screw rod is disassembled, penetrates through the circular hole of the upper protective plate and then is connected with the gear box shaft again, and then the other screw rods are disassembled and replaced in sequence;
and 5: the lower protection plate is sleeved from the bottom ends of the four screw rods and is positioned through a nut B, then a jack is placed in a circular groove of the lower protection plate, the nut B is rotated to drive the lower protection plate to move upwards, meanwhile, the jack is moved upwards and clamped in the circular groove of the upper protection plate, and the nut B is screwed tightly;
step 6: heating the outer surface of the coupler to expand the outer surface, expanding the gap between the matching surface of the coupler and the matching surface of the gear box shaft, and enabling the coupler to continue to move upwards;
then pressurizing the jack to slowly drive the upper guard plate and the coupling to synchronously move upwards;
and 7: and after the coupler and the gear box shaft are installed in place, the jack is kept still, and the tool is disassembled after the coupler is cooled.
Preferably, in step 4, after one of the screws is disassembled, one screw and the other two screws at the opposite corners of the screw are disassembled and replaced in sequence.
Preferably, in step 6, the outer surface of the coupling is heated using a baking handle.
The utility model discloses a show the effect and lie in:
(1) the utility model discloses assembly tool and method have effectively solved the equipment difficult problem of the high-accuracy part of circulating pump gear box shaft coupling, have reduced demand and work load to the manpower, have reduced safe risk.
(2) The utility model discloses assembly tool easy operation, convenient reliable has reduced the equipment complexity of circulating pump gear box shaft coupling by a wide margin, has reduced the risk of dying of stinging that shaft coupling and gear box axle interference fit produced simultaneously.
(3) The utility model discloses the assembly method is succinct high-efficient, and the front and back step is in one go, has reduced the equipment time effectively.
(4) The utility model discloses the rectangular hole of well upper protective plate is convenient for adjust the relative position of shaft coupling and gearbox shaft, finishes the back in order to prevent to go up the swing of backplate upward movement in-process at the adjustment too big, and the connecting hole that the screw rod was changed to the accessible is the round hole, ensures that the upward movement oscillating quantity is as little as possible, has apparent application effect.
Drawings
FIG. 1 is a schematic view of an assembly tool;
FIG. 2 is a schematic diagram of a pump shaft position on a gearbox;
FIG. 3 is a schematic view of a coupling;
FIG. 4 is a schematic view of the upper shield;
FIG. 5 is a schematic view of a sleeve;
FIG. 6 is a schematic view of a nut;
FIG. 7 is a schematic view of a screw;
FIG. 8 is a schematic view of a jack;
FIG. 9 is a schematic view of the lower shield;
fig. 10 is a sectional view of the assembly tool.
In the figure: the gear box comprises a lower cover plate of a gear box 1, a gear box shaft 2, a coupler 3, an upper protective plate 4, a sleeve 5, a nut A6, a screw 7, a jack 8 and a lower protective plate 9.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The assembling tool for the nuclear power station circulating pump gearbox coupler is used for assembling a lower cover plate 1 of a gearbox, a gearbox shaft 2 and a coupler 3 and comprises an upper protection plate 4, a sleeve 5, a nut A6, a screw 7, a jack 8, a lower protection plate 9 and a nut B.
The upper guard plate 4 is a circular plate structure, a circular groove is processed at the center of the lower surface of the upper guard plate, and four strip holes and four through holes are arranged on the outer side of the circular groove in a crossed mode at equal intervals along the circumferential direction. The size of circular slot is unanimous with the jacking part size of jack 8, and the jacking part of jack 8 of being convenient for cooperates with upper guard plate 4, guarantees that the jacking part of jack 8 drives upper guard plate 4 and moves up the in-process steady removal. The upper edge of the upper protection plate 4 is clamped in the spigot of the coupler 3.
The lower guard plate 9 is a circular plate structure, a circular groove is machined in the center of the upper surface of the lower guard plate, and four through holes are machined in the outer side of the circular groove at equal intervals along the circumferential direction. The size of the circular groove is consistent with the size of the base of the jack 8, so that the jack 8 can be conveniently fixed on the lower protective plate 9.
The jack 8 is arranged between the circular groove of the upper protection plate 4 and the circular groove of the lower protection plate 9.
Four screw rods 7 are all provided with through-wire bolts, one end of each screw rod extends out of the through-hole of the upper protection plate 4 and is screwed into the bolt hole at the head part of the gearbox shaft 2 after passing through the shaft hole of the coupler 3, and the other end of each screw rod passes through the through-hole of the lower protection plate 9.
The sleeve 5 is of a cylindrical structure and is sleeved on the screw 7 between the upper protection plate 4 and the lower protection plate 9.
A nut a6 is provided on the screw 7 below the sleeve 5 to urge the sleeve 5 against the lower surface of the upper guard plate 4.
And a nut B is arranged on the screw 7 below the lower protective plate 9 to fix the lower protective plate 9 and further support a jack 8, and the upper protective plate 4 slowly and stably moves upwards through the jack 8.
The sleeve 5 can avoid damaging the lower surface of the upper protection plate 4 in the process of rotating the nut A6, and meanwhile, the operation condition that the wrench is inconvenient to act due to the small cavity space of the coupler 3 is improved, and the operation space is extended to the lower part of the coupler 3, so that the nut A6 is more convenient to rotate.
A nuclear power station circulating pump gear box coupling assembling method is operated by adopting the assembling tool and comprises the following steps:
step 1: the shaft coupling 3 is conveyed to the position right below the gearbox shaft 2, and one ends of the four screw rods 7 are screwed into bolt holes in the head of the gearbox shaft 2 after passing through shaft holes of the shaft coupling 3 and are screwed tightly.
Step 2: an upper protection plate 4 is installed on the lower portion of the coupler 3, so that the four screw rods 7 respectively penetrate through the strip holes of the upper protection plate 4 and are fixed by the sleeves 5 and the nuts a6, and the four nuts a6 are rotated at the same time, so that the coupler 3 slowly moves upwards until the top end of the internal spline on the coupler 3 is in contact with the bottom end of the external spline of the gearbox shaft 2.
And step 3: the inner spline of the coupler 3 is just matched with the outer spline of the gearbox shaft 2 by rotating the coupler 3, as shown in fig. 10;
and the four nuts A6 are continuously rotated, so that the coupler 3 continuously and slowly moves upwards until the matching surface of the coupler 3 is contacted with the matching surface of the gearbox shaft 2, the coupler cannot continuously move upwards, and the nut A6 is stopped rotating.
And 4, step 4: one screw 7 is disassembled, the screw passes through the round hole of the upper protective plate 4 and then is connected with the gearbox shaft 2 again, and then one screw 7 and the other two screws 7 at the opposite angles of the screws 7 are disassembled and replaced in sequence;
and 5: the lower protection plate 9 is sleeved from the bottom ends of the four screw rods 7 and is positioned through the nut B, then the jack 8 is placed in the circular groove of the lower protection plate 9, the nut B is rotated to drive the lower protection plate 9 to move upwards, meanwhile, the jack 8 moves upwards and is clamped in the circular groove of the upper protection plate 4, and the nut B is screwed down.
Step 6: heating the outer surface of the coupler 3 by using a baking handle to expand the outer surface by heating, and expanding a gap between the matching surface of the coupler 3 and the matching surface of the gearbox shaft 2 to enable the coupler 3 to continuously move upwards;
then the jack 8 is pressurized, so that the jack slowly drives the upper protection plate 4 and the coupling 3 to synchronously move upwards.
And 7: and after the coupler 3 and the gearbox shaft 2 are installed in place, the jack 8 is kept still, and the tool is disassembled after the coupler 3 is cooled.
Claims (6)
1. The utility model provides a nuclear power station circulating pump gear box shaft coupling assembling tool for assemble gear box axle (2) and shaft coupling (3), its characterized in that: comprises an upper protection plate (4), a nut A (6), a screw rod (7), a jack (8), a lower protection plate (9) and a nut B;
the upper protection plate (4) is of a circular plate structure, a circular groove is machined in the center of the lower surface of the upper protection plate, and N through holes are formed in the outer side of the circular groove at equal intervals along the circumferential direction, wherein N is more than or equal to 3;
the upper edge of the upper protection plate (4) is clamped in the spigot of the coupler (3);
the lower protective plate (9) is of a circular plate structure, a circular groove is machined in the center of the upper surface of the lower protective plate, and N through holes are machined in the outer side of the circular groove at equal intervals along the circumferential direction;
the jack (8) is arranged between the circular groove of the upper protection plate (4) and the circular groove of the lower protection plate (9);
n screw rods (7) are arranged, one end of each screw rod extends out of the through hole of the upper protection plate (4), passes through the shaft hole of the coupler (3) and then is screwed into the bolt hole at the head part of the gearbox shaft (2), and the other end of each screw rod penetrates through the through hole of the lower protection plate (9);
a nut A (6) is arranged on a screw rod (7) below the upper protection plate (4) to fix the upper protection plate (4);
and a nut B is arranged on the screw rod (7) below the lower protective plate (9) to fix the lower protective plate (9) and further support the jack (8), and the upper protective plate (4) slowly and stably moves upwards through the jacking jack (8).
2. The nuclear power plant pump-following gearbox coupling assembling tool as recited in claim 1, wherein: and N strip holes and N through holes are formed in the outer side of the circular groove in the lower surface of the upper protection plate (4) at equal intervals along the circumferential direction in a crossed manner.
3. The nuclear power station pump-following gearbox coupling assembling tool as claimed in claim 2, wherein: n is 4.
4. The nuclear power plant pump-following gearbox coupling assembling tool as recited in claim 1, wherein: go up screw rod (7) between backplate (4) and nut A (6) and go up the cover and be equipped with sleeve (5) to avoid damaging the lower surface of backplate (4) in the in-process of rotating nut A (6), extend operating space to the below of shaft coupling (3) simultaneously and be more convenient for rotatory nut A (6).
5. The nuclear power plant pump-following gearbox coupling assembling tool as recited in claim 1, wherein: the screw rods (7) are all through-wire bolts.
6. The nuclear power plant pump-following gearbox coupling assembling tool as recited in claim 1, wherein: the size of the circular groove on the upper protection plate (4) is consistent with the size of a jacking component of the jack (8), and the size of the circular groove on the lower protection plate (9) is consistent with the size of a base of the jack (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023144935.7U CN214445999U (en) | 2020-12-23 | 2020-12-23 | Nuclear power station circulating pump gear box coupling assembling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023144935.7U CN214445999U (en) | 2020-12-23 | 2020-12-23 | Nuclear power station circulating pump gear box coupling assembling tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214445999U true CN214445999U (en) | 2021-10-22 |
Family
ID=78193773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023144935.7U Active CN214445999U (en) | 2020-12-23 | 2020-12-23 | Nuclear power station circulating pump gear box coupling assembling tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214445999U (en) |
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2020
- 2020-12-23 CN CN202023144935.7U patent/CN214445999U/en active Active
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