CN111805462B - Mechanical flyweight adjusting tool and method for pneumatic auxiliary water supply pump - Google Patents
Mechanical flyweight adjusting tool and method for pneumatic auxiliary water supply pump Download PDFInfo
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- CN111805462B CN111805462B CN202010691336.2A CN202010691336A CN111805462B CN 111805462 B CN111805462 B CN 111805462B CN 202010691336 A CN202010691336 A CN 202010691336A CN 111805462 B CN111805462 B CN 111805462B
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- 238000000034 method Methods 0.000 title claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 238000012360 testing method Methods 0.000 claims abstract description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 230000005484 gravity Effects 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims 1
- 230000000007 visual effect Effects 0.000 abstract description 2
- 238000012545 processing Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B13/00—Spanners; Wrenches
- B25B13/48—Spanners; Wrenches for special purposes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
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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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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to the technical field of overspeed tests of a steam-driven auxiliary water supply pump of a nuclear power plant, and particularly discloses a tool and a method for adjusting a mechanical flyweight of the steam-driven auxiliary water supply pump, wherein the middle part of a flyweight adjusting spanner is a sleeve, a handle is fixed at the upper part of the sleeve, a grabbing rod is arranged at the bottom of the sleeve, and the bottom end of the grabbing rod is inserted into an upper adjusting hole of the flyweight; the flyweight is connected with the pump shaft through threads; one end of the magnetic meter seat is adsorbed on the pump shell through the magnetic end, and the other end of the magnetic meter seat is fixed with the dial indicator. The adjusting tool and the adjusting method greatly improve the adjusting precision, and enable the on-site adjusting work to be visual and efficient.
Description
Technical Field
The invention belongs to the technical field of overspeed tests of a steam-driven auxiliary water supply pump of a nuclear power plant, and particularly relates to a tool and a method for adjusting a mechanical flyweight of the steam-driven auxiliary water supply pump.
Background
Taking a certain nuclear power station as an example, after the unit is debugged and maintained and in the periodic test, the pneumatic auxiliary water supply pump needs to perform overspeed test to verify whether the rotating speed of the electronic tripping device pump jump (short for electric jump) and the rotating speed of the mechanical tripping device pump jump (short for machine jump) meet the design requirements, and if the rotating speed of the mechanical tripping device does not meet the running requirements, mechanical flyweight adjustment needs to be performed for many times. The radial gravity center position of the flyweight relative to the pump shaft is adjusted by screwing the flyweight in or out, and if the pump set jumps before reaching the required tripping rotation speed (9040-9200 r/min), the flyweight must be unscrewed; if the machine jump speed reaches the machine jump speed, the pump set does not jump, and the flyweight must be screwed in.
According to the design requirement, every time the flyweight moves by 0.01mm, the corresponding machine jump rotating speed changes by 60r/min. The operation is most complicated, the key path of the unit is occupied during the adjustment, and the original mechanical flyweight adjustment has a plurality of problems: the adjusting tool is common, the method is crude, the adjusting precision is low, repeated adjustment and verification are needed, and the tripping rotating speed range is gradually reduced by using a 'reduced interval method' according to the field adjusting experience to adjust; the adjustment period is long, and the tool and the method generally need to be adjusted for at least 3 times (the adjustment period is about 3-4 hours each time) so that the adjustment period can be adjusted to a proper range, for example, the adjustment period exceeds 3 days, and the state of the unit needs to be withdrawn when the operation specification of the unit of the nuclear power station is violated; repeated adjustment increases the waste of manpower, material resources and construction period caused by cross operation and work kind matching, causes the power generation capacity loss of a power plant and the like.
Therefore, it is needed to design a tool and a method for adjusting the mechanical flyweight of the auxiliary pneumatic water supply pump to solve the above problems.
Disclosure of Invention
The invention aims to provide a tool and a method for adjusting a mechanical flyweight of a pneumatic auxiliary water supply pump so as to improve the accuracy of mechanical flyweight adjustment.
The technical scheme of the invention is as follows:
a mechanical flyweight adjusting tool for a pneumatic auxiliary water supply pump comprises a dial indicator, an extension rod, a flyweight adjusting spanner and a magnetic meter seat;
the middle part of the flyweight adjusting spanner is a sleeve;
a pair of handles are fixed on the upper part of the sleeve;
two grab bars are arranged at the bottom of the sleeve;
the bottom end of the grabbing rod is inserted into an upper adjusting hole of the flyweight;
the flyweight is connected with the pump shaft through threads;
one end of the magnetic meter seat is adsorbed on the pump shell through a magnetic end, and the other end of the magnetic meter seat is fixed with a dial indicator;
screwing an extension rod into the mounting position of the dial indicator needle measuring round head to extend the measuring rod of the dial indicator;
the extension rod is of a metal cylinder structure, and the bottom measuring end of the extension rod is contacted with the center position of the spherical surface at the upper end of the flyweight.
The device also comprises a viewing hole which is processed on the side wall of the middle part of the sleeve.
The number of the observation holes is two, and the observation holes are symmetrically arranged at 180 degrees.
The pair of handles are symmetrically arranged along the radial direction 180 degrees at the upper part of the sleeve, and the positions of the two grabbing rods are up and down corresponding to the handles.
The central axes of the two observation holes are perpendicular to the plane where the handle and the grab bar are located.
A mechanical flyweight adjusting method of a steam-driven auxiliary water supply pump based on an adjusting tool comprises the following steps:
step 1: calculating the radial gravity center position of the flyweight to be adjusted relative to the pump shaft;
step 2: assembling a flyweight adjusting spanner, and then inserting the flyweight adjusting spanner into an upper adjusting hole of the flyweight;
step 3: assembling a dial indicator and a magnetic meter seat;
step 4: checking the stability of each component and recording the original data;
step 5: rotating the handle according to the value calculated in the step 1 so as to adjust the position of the flyweight;
step 6: sequentially disassembling the dial indicator, the extension rod, the magnetic meter seat and the flyweight adjusting spanner;
step 7: restoring each component of the pump set, performing an overspeed test of the pump set, and judging whether the mechanical tripping rotating speed is qualified or not;
and if the mechanical tripping rotation speed of the pump set is qualified, finishing the mechanical tripping rotation speed adjustment of the pump set, and if the mechanical tripping rotation speed of the pump set is unqualified, repeating the steps in sequence until the mechanical tripping rotation speed adjustment of the pump set is qualified.
In the step 1, according to the mechanical trip rotation speed b r/min when the pump set overspeed test is disqualified, and combining with the mechanical trip rotation speed acceptance standard a r/min of the pump set overspeed test, wherein a is not less than 9040 and not more than 9200r/min, the radial gravity center position c of the flyweight, which is required to be adjusted, relative to the pump shaft is calculated, and c= |b-a|/60 is 0.01mm;
if b is more than a, the flyweight c mm is screwed out; if b is less than a, screwing in the flyweight c mm.
In step 3, the gauge needle measuring round head of the dial indicator is disassembled, the extension rod is screwed into the gauge needle measuring round head mounting position, then the dial indicator is mounted on the magnetic gauge stand, the magnetic force end of the magnetic gauge stand is adsorbed on the pump shell, and the bottom measuring end of the extension rod is adjusted to be in contact with the center position of the spherical surface of the upper end of the flyweight.
And 4, checking to ensure that each part of the magnetic meter seat, the dial indicator and the extension rod is stable and free of looseness, adjusting the dial indicator to a zero position, and recording original zero position data.
In step 5, the handle is slowly rotated, and the reading change of the dial indicator is observed until the adjustment is carried out to meet the requirements of the screwing-in or screwing-out direction and the relative displacement of the flyweight calculated in step 1.
The invention has the remarkable effects that:
the adjusting tool and the adjusting method greatly improve the adjusting precision, lead the on-site adjusting work to be visual and efficient, and have the following advantages:
1) The adjustment accuracy is improved. The tool can accurately control the radial relative height adjustment of the mechanical flyweight and the pump shaft to the range of 0.005-0.01mm, namely the minimum rotational speed adjustment accuracy can be controlled to be 30-60r/min, the mechanical tripping rotational speed requirement is 9040-9200r/min, the adjustment accuracy requirement can be completely met, and the accurate calculation and 1-2 times of adjustment to the qualified range can be basically realized.
2) The workload is reduced, and the operation risk is reduced. The tool has high adjustment precision, and can shorten the adjustment times to 1-2 times to finish the tripping rotation speed adjustment work. Thereby reducing the workload and greatly reducing the cross operation caused by repeated adjustment; meanwhile, the continuous operation time is reduced, and the safety operation risk can be reduced.
3) The adjustment times are reduced, and the overhaul period is shortened.
4) Shortening the construction period of the main line and improving the unit benefit.
Drawings
FIG. 1 is a schematic diagram of a mechanical flyweight adjustment tooling;
fig. 2 is a schematic diagram of a fly hammer adjustment wrench.
In the figure: 1-percentage table; 2-an extension rod; 3-a flyweight adjusting spanner; 4-flyweights; 5-a pump shaft; 6-a magnetic gauge stand; 7-a handle; 8-a sleeve; 9-observation holes; 10-grab bar.
Detailed Description
The invention will be described in further detail with reference to the accompanying drawings and specific examples.
The mechanical flyweight adjusting tool for the steam-driven auxiliary water supply pump shown in fig. 1 comprises a dial indicator 1, an extension rod 2, a flyweight adjusting spanner 3 and a magnetic meter seat 6.
As shown in fig. 2, the middle part of the flyweight adjusting wrench 3 is provided with a sleeve 8, and the sleeve 8 is formed by processing a thick-wall iron pipe fitting.
Drilling and tapping holes are formed in the radial 180-degree symmetrical direction of the upper part of the sleeve 8 and are used for fixing a pair of handles 7; drilling and tapping holes are formed in the bottom of the sleeve 8 and at positions corresponding to the upper and lower parts of the handle 7, and are used for installing two grab bars 10; two observation holes 9 are formed in the symmetrical 180-degree positions on the side wall of the middle part of the sleeve 8, and the central axes of the two observation holes 9 are perpendicular to the planes of the handle 7 and the grab bar 10.
The handle 7 is formed by processing an iron rod, one end of the handle is connected with the upper part of the sleeve 8 by processing threads, and the arm of force can be increased to realize the rotary flyweight 4.
The grab bar 10 is formed by processing an iron rod, the top end of the grab bar is connected with the bottom of the sleeve 8 through processing threads, and the bottom end of the grab bar is inserted into an upper adjusting hole of the flyweight 4. The grab bar 10 is used for transmitting the torsion of the flyweight adjusting spanner 3 to the flyweight 4 to realize the rotation adjustment of the flyweight 4.
The two observation holes 9 are used for observing whether the bottom measuring end of the extension rod 2 is positioned at the center of the spherical surface at the upper end of the flyweight 4 when the flyweight 4 is adjusted.
The flyweights 4 are mechanical flyweights and are connected with the pump shaft 5 through threads. When the grab bar 10 is inserted into the upper adjusting hole of the flyweight 4, the flyweight 4 is screwed up and down by twisting the handle 7, so as to adjust the relative height positions of the flyweight 4 and the pump shaft 5 in the radial direction.
The pump shaft 5 is a pump shaft of a steam-driven auxiliary water supply pump.
The magnetic meter seat 6 is a universal tool, one end of the magnetic meter seat is adsorbed on the pump shell through a magnetic end, and the other end of the magnetic meter seat is fixed with the dial indicator 1.
The dial indicator 1 is a universal metering tool, and the extension rod 2 is screwed in the mounting position of the gauge needle measuring round head of the universal metering tool so as to extend the measuring rod of the dial indicator 1, thereby realizing real-time measurement of the unscrewing height of the flyweight 4;
the extension rod 2 is of a metal cylinder structure, and the bottom measuring end of the extension rod 2 is contacted with the center position of the spherical surface at the upper end of the flyweight 4.
The mechanical flyweight adjusting method for the pneumatic auxiliary water supply pump adopts the adjusting tool to operate, and comprises the following steps:
step 1: according to b r/min of mechanical trip rotation speed when the pump set overspeed test is disqualified, and in combination with a r/min of mechanical trip rotation speed acceptance standard of the pump set overspeed test, wherein a is not less than 9040 and not more than 9200r/min, the radial gravity center position c of the flyweight 4, which is required to be adjusted, relative to the pump shaft 5 is calculated, and c= |b-a|/60 is 0.01mm;
if b is more than a, the flyweight c mm is screwed out; if b is less than a, screwing in the flyweight c mm;
step 2: the handle 7 and the grab rod 10 are respectively screwed into corresponding threaded holes of the sleeve 8 to form a flyweight adjusting spanner 3, and then the flyweight adjusting spanner 3 is inserted into an upper adjusting hole of the flyweight 4;
step 3: disassembling the gauge needle measuring round head of the dial indicator 1, screwing the extension rod 2 into the mounting position of the gauge needle measuring round head of the dial indicator 1, then mounting the dial indicator 1 on the magnetic gauge stand 6, adsorbing the magnetic end of the magnetic gauge stand 6 on the pump shell, and adjusting the bottom measuring end of the extension rod 2 to be in contact with the central position of the spherical surface of the upper end of the flyweight 4;
step 4: checking to ensure that each component of the magnetometer seat 6, the dial indicator 1 and the extension rod 2 is stable and free of looseness, adjusting the dial indicator 1 to a zero position and recording original zero position data;
step 5: slowly rotating the handle 7, and observing the reading change of the dial indicator 1 until the reading change is adjusted to meet the requirements of the direction and the relative displacement of the flyweight 4 in or out calculated in the step 1;
step 6: sequentially disassembling the dial indicator 1, the extension rod 2, the magnetic meter seat 6 and the flyweight adjusting spanner 3;
step 7: restoring each component of the pump set, performing an overspeed test of the pump set, and judging whether the mechanical tripping rotating speed is qualified or not;
and if the mechanical tripping rotation speed of the pump set is qualified, finishing the mechanical tripping rotation speed adjustment of the pump set, and if the mechanical tripping rotation speed of the pump set is unqualified, repeating the steps in sequence until the mechanical tripping rotation speed adjustment of the pump set is qualified.
Claims (10)
1. The utility model provides a supplementary feed pump machinery flyweight adjustment frock of steam, its characterized in that: comprises a dial indicator (1), an extension rod (2), a flyweight adjusting spanner (3) and a magnetic meter seat (6);
the middle part of the flyweight adjusting spanner (3) is provided with a sleeve (8);
a pair of handles (7) are fixed on the upper part of the sleeve (8);
two grab bars (10) are arranged at the bottom of the sleeve (8);
the bottom end of the grabbing rod (10) is inserted into an upper adjusting hole of the flyweight (4);
the flyweight (4) is connected with the pump shaft (5) through threads;
one end of the magnetic meter seat (6) is adsorbed on the pump shell through a magnetic end, and the other end is fixed with the dial indicator (1);
the extension rod (2) is screwed in the mounting position of the measuring round head of the dial indicator (1) to extend the measuring rod of the dial indicator (1);
the extension rod (2) is of a metal cylinder structure, and the bottom measuring end of the extension rod (2) is contacted with the center position of the spherical surface at the upper end of the flyweight (4);
the handle (7) and the grab bar (10) are processed by iron bars.
2. The mechanical flyweight adjusting tool for a steam auxiliary water supply pump as claimed in claim 1, wherein: the device also comprises an observation hole (9) which is processed on the side wall of the middle part of the sleeve (8).
3. The mechanical flyweight adjusting tool for a steam auxiliary water supply pump as claimed in claim 2, wherein: the number of the observation holes (9) is two, and the observation holes are symmetrically arranged at 180 degrees.
4. A mechanical flyweight adjusting tool for a steam auxiliary water supply pump as claimed in claim 3, wherein: the pair of handles (7) are symmetrically arranged along the radial direction 180 degrees at the upper part of the sleeve (8), and the positions of the two grabbing rods (10) are corresponding to the handles (7) up and down.
5. The mechanical flyweight adjusting tool for a steam auxiliary water supply pump of claim 4, wherein: the central axes of the two observation holes (9) are perpendicular to the planes of the handle (7) and the grab bar (10).
6. A method for adjusting mechanical flyweights of a pneumatic auxiliary water supply pump based on the adjusting tool set forth in claim 5, which is characterized in that: the method comprises the following steps:
step 1: calculating the radial gravity center position of the flyweight (4) to be adjusted relative to the pump shaft (5);
step 2: assembling a flyweight adjusting spanner (3), and then inserting the flyweight adjusting spanner (3) into an upper adjusting hole of the flyweight (4);
step 3: assembling a dial indicator (1) and a magnetic meter seat (6);
step 4: checking the stability of each component and recording the original data;
step 5: rotating the handle (7) according to the value calculated in the step 1 so as to adjust the position of the flyweight (4);
step 6: sequentially disassembling a dial indicator (1), an extension rod (2), a magnetic meter seat (6) and a flyweight adjusting spanner (3);
step 7: restoring each component of the pump set, performing an overspeed test of the pump set, and judging whether the mechanical tripping rotating speed is qualified or not;
and if the mechanical tripping rotation speed of the pump set is qualified, finishing the mechanical tripping rotation speed adjustment of the pump set, and if the mechanical tripping rotation speed of the pump set is unqualified, repeating the steps in sequence until the mechanical tripping rotation speed adjustment of the pump set is qualified.
7. The method for adjusting the mechanical flyweight of the auxiliary steam feed pump as set forth in claim 6, wherein: in the step 1, according to the mechanical tripping rotating speed b r/min when the pump set overspeed test is unqualified, and combining the mechanical tripping rotating speed acceptance standard a r/min of the pump set overspeed test, wherein the speed a is not less than 9040 and not more than 9200r/min, the radial gravity center position c, c= |b-a|/60 x 0.01mm of the flyweight (4) relative to the pump shaft (5) to be adjusted is calculated;
if b is more than a, the flyweight c mm is screwed out; if b is less than a, screwing in the flyweight c mm.
8. The method for adjusting the mechanical flyweight of the auxiliary steam feed pump as set forth in claim 7, wherein: in the step 3, the gauge needle measuring round head of the dial indicator (1) is disassembled, the extension rod (2) is screwed into the gauge needle measuring round head installation position of the dial indicator (1), then the dial indicator (1) is installed on the magnetic gauge stand (6), the magnetic end of the magnetic gauge stand (6) is adsorbed on the pump shell, and the bottom measuring end of the extension rod (2) is adjusted to be in contact with the central position of the spherical surface at the upper end of the flyweight (4).
9. The method for adjusting the mechanical flyweight of the steam-driven auxiliary water supply pump as claimed in claim 8, wherein the method comprises the following steps: in the step 4, checking to ensure that each part of the magnetometer base (6), the dial indicator (1) and the extension rod (2) is stable and free of looseness, adjusting the dial indicator (1) to a zero position and recording original zero position data.
10. The method for adjusting the mechanical flyweight of the steam-driven auxiliary water supply pump as claimed in claim 9, wherein the method comprises the following steps: in the step 5, the handle (7) is slowly rotated, and the reading change of the dial indicator (1) is observed until the adjustment is carried out to meet the requirements of the screwing-in or screwing-out direction and the relative displacement of the flyweight (4) calculated in the step 1.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010691336.2A CN111805462B (en) | 2020-07-17 | 2020-07-17 | Mechanical flyweight adjusting tool and method for pneumatic auxiliary water supply pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010691336.2A CN111805462B (en) | 2020-07-17 | 2020-07-17 | Mechanical flyweight adjusting tool and method for pneumatic auxiliary water supply pump |
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| Publication Number | Publication Date |
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| CN111805462A CN111805462A (en) | 2020-10-23 |
| CN111805462B true CN111805462B (en) | 2024-04-09 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114459741A (en) * | 2021-09-02 | 2022-05-10 | 福建福清核电有限公司 | Off-line calibration method for mechanical flyweight of pneumatic pump |
| CN114215735B (en) * | 2021-12-14 | 2024-05-10 | 江苏核电有限公司 | Complete tool for adjusting rotating speed of pneumatic pump of nuclear power station |
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| CN111805462A (en) | 2020-10-23 |
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