CN112268689A - Method for detecting installation quality of shafting throw of large vertical circulating water pump - Google Patents
Method for detecting installation quality of shafting throw of large vertical circulating water pump Download PDFInfo
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- 238000009434 installation Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 230000008878 coupling Effects 0.000 claims abstract description 31
- 238000010168 coupling process Methods 0.000 claims abstract description 31
- 238000005859 coupling reaction Methods 0.000 claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 230000007547 defect Effects 0.000 claims description 3
- 238000007689 inspection Methods 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000005299 abrasion Methods 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 2
- 208000033999 Device damage Diseases 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- 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
- G01B5/14—Measuring arrangements characterised by the use of mechanical techniques for measuring distance or clearance between spaced objects or spaced apertures
- G01B5/146—Measuring arrangements characterised by the use of mechanical techniques for measuring distance or clearance between spaced objects or spaced apertures measuring play on bearings
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/021—Gearings
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/022—Power-transmitting couplings or clutches
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/025—Test-benches with rotational drive means and loading means; Load or drive simulation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/04—Bearings
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Abstract
The invention belongs to the technical field of maintenance and detection of nuclear power plants, and particularly relates to a method for detecting installation quality of a large vertical circulating water pump shafting through throw. The method comprises the steps that 5 dial indicators arranged at different positions are arranged, the shaft of a dial rotor rotates 360 degrees, the readings of the 5 dial indicators are respectively read, and the shafting pendulum values at all positions are measured; five positions of the circumferential surface of the thrust block at the non-driving end of the motor, the circumferential surface of the output coupling at the driving end of the motor, the circumferential surface of the input coupling of the gear box, the circumferential surface of the output coupling of the gear box and the circumferential surface of the sliding rotor of the guide bearing under the pump are respectively marked according to 8 equal parts and then are used as reading positions of the dial indicator. The invention detects the installation quality and the equipment quality condition of the pump set by measuring and calculating the shafting throw, identifies and positions the potential fault point of the pump set in advance and carries out targeted inspection and processing.
Description
Technical Field
The invention belongs to the technical field of maintenance and detection of nuclear power plants, and particularly relates to a method for detecting installation quality of a large vertical circulating water pump shafting through throw.
Background
Fuqing nuclear power unit No. 1-6 total 12 circulating water pump units, its structure is large-scale vertical mixed flow pump, mainly by the power 6500kW large-scale vertical motor, FQHDL35 type planetary reduction gear box and concrete volute pump make up. Because the large-scale vertical pump shaft system comprises a motor shaft, a gear box shaft and a pump shaft, when the mounting precision of the shaft system is insufficient or internal components have faults, the motor, the gear box or the pump shaft can collide and grind with a bearing or a static component, and a pump set can vibrate abnormally in the operation process, so that the abrasion and the fatigue damage of mechanical parts are aggravated, and the abnormalities such as bearing bush burning, gear box planetary core cladding device damage, pump opening ring abrasion and the like can be caused in serious conditions, so that the efficiency of the pump set is reduced, and the service life of equipment is shortened.
In the prior art, the whole shafting is verified to be positioned at the center of the pump set by checking and adjusting the gap between guide bearings of each device and the distance between a rotor and a shell in the installation or inspection process. The method can only confirm the central position of the shafting, cannot detect the size of each shafting deviated from the central position during operation, and cannot detect potential faults inside each device. Therefore, the invention provides a method for detecting the installation quality of a shafting of a large vertical circulating water pump, namely, the installation quality and the equipment quality condition of the pump set are detected by measuring and calculating the shafting pendulum degree in pump set disassembly inspection or annual inspection.
Disclosure of Invention
The invention aims to provide a method for detecting installation quality of shafting throw of a large vertical circulating water pump, which detects the installation quality and equipment quality condition of a pump set by measuring and calculating the shafting throw, identifies and positions potential fault points of the pump set in advance, and checks and processes the potential fault points in a targeted manner.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a method for detecting installation quality of shafting throw of a large vertical circulating water pump,
step 1: defining the vertical direction of a pump shaft as the Y direction, and defining the direction vertical to the Y direction in a horizontal plane as the X direction;
step 2: defining shafting throw, namely, when a large vertical rotating machine is installed, the geometric center line of a main shaft of the rotating machine is not completely superposed with a theoretical center line, when a rotating shaft rotates, the center line of the main shaft rotates around the theoretical center line at a certain angle, the numerical value is the difference of single-side percentage representation numerical values of two points corresponding to the diameter direction, and the maximum difference value is the maximum throw value of the position;
and step 3: marking five positions of the circumferential surface of a thrust block at the non-driving end of the motor, the circumferential surface of an output coupling at the driving end of the motor, the circumferential surface of an input coupling of the gear box, the circumferential surface of the output coupling of the gear box and the circumferential surface of a sliding rotor of a guide bearing under the pump according to 8 equal parts respectively, and then taking the five positions as reading positions of a dial indicator;
and 4, step 4: the measuring head of the dial indicator A is arranged in the X direction of the circumferential end face of the thrust block at the non-driving end of the motor and is vertical to a shaft system, and the gauge seat is fixed on an upper frame of the motor;
and 5: a measuring head of a dial indicator B is arranged in the X direction of the circumferential end face of an output coupling at the driving end of the motor and is vertical to a shaft system, and a gauge stand is fixed on a lower rack of the motor;
step 6: the measuring head of the dial indicator C is arranged in the X direction of the circumferential end face of the input coupling of the gear box and is vertical to a shaft system, and the gauge stand is fixed on the upper cover of the gear box;
and 7: the measuring head of the dial indicator D is arranged in the X direction of the circumferential end face of the output coupling of the gear box and is vertical to a shaft system, and the gauge stand is fixed on the base of the gear box;
and 8: the measuring head of the dial indicator E is arranged in the X direction of the circumferential end face of a sliding rotor of a lower guide bearing of the pump and is vertical to a shaft system, and a gauge stand is fixed on a guide bearing stand of the pump;
and step 9: by slowly rotating the motor shaft 360 °, 5 dial indicators were read at 5 positions 8 equally spaced marks in step 4;
step 10: determining a swing degree reference according to experience;
step 11: calculating the maximum throw of a shaft system, and respectively calculating the maximum throw of a thrust head of a non-driving end of a motor, the maximum throw of an output coupler of a driving end of the motor, the maximum throw of an input shaft of a gear box, the maximum throw of an output shaft of the gear box and the maximum throw of a sliding rotor of a guide bearing under a pump according to the readings of the dial indicators A-E;
step 12: comparing and analyzing the five position maximum swing values calculated in the step 11 with the reference in the step 10, and when the five position maximum swing values are all in an allowable range, indicating that the installation quality of the pump set and the quality of equipment are qualified; when some position or positions exceed the reference in step 10, it indicates that the shafting has deviation and needs to be adjusted or a fault point exists inside the equipment corresponding to the position and needs to be checked and processed in a targeted manner.
The shafting throw is influenced by equipment manufacturing error, installation error and equipment quality defect factors.
The step 10: the swing degrees of the driving end and the non-driving end of the motor shaft are less than or equal to 0.10 mm.
The step 10: the input shaft throw of the gear box is less than or equal to 0.10 mm.
The step 10: the swing of the output shaft of the gear box is less than or equal to 0.28 mm.
The step 10: the swing of the guide bearing and the sliding rotor under the pump is less than or equal to 0.15 mm.
The step 11: the method for calculating the maximum throw of the shafting is characterized in that the difference of percentage representation numbers of two points corresponding to the diameter direction is adopted, four groups of throw values are calculated corresponding to eight points in each position, and the maximum value is the maximum throw value of the position shafting.
The beneficial effects obtained by the invention are as follows:
1. the method can only confirm the central position of the shafting, cannot detect the size of each shafting deviated from the theoretical central position during operation, cannot predict abnormal abrasion caused by excessive shafting deviation, and cannot detect potential faults in each device after operation. The method of the invention calculates the pendulum value of the corresponding position according to the percentage representation number of each shafting, and can detect whether the installation quality or the equipment quality is qualified or not by comparing with the standard data.
2. By the method, if the swing degree exceeds the standard at a certain position, the deviation of the installation gap at the position or the abnormal abrasion of internal parts at the position is shown, so that the potential fault point of the pump set can be identified and positioned in advance, and the detection and the processing can be carried out in a targeted manner.
Drawings
FIG. 1 is a schematic diagram of a structure for measuring the throw of a large vertical circulating water pump shafting;
1. dial indicator A2, dial indicator B3, dial indicator C4, dial indicator D5, dial indicator E6, motor 7, planetary reduction gear box 8, pump shaft 9, motor non-drive end thrust block 10, motor drive end output coupling 11, gear box input coupling 12, gear box output coupling 13, pump lower guide bearing slide rotor
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
A method for detecting installation quality of shafting throw of a large vertical circulating water pump comprises 5 dial indicators arranged at different positions, wherein the readings of the 5 dial indicators are read through a shaft of a turning gear shaft, and the shafting throw value is measured;
the vertical direction of the pump shaft is defined as the Y direction, and the direction perpendicular to the Y direction in the horizontal plane is defined as the X direction.
Defining shafting throw means that when a large vertical rotating machine is installed, due to the influence of various factors such as equipment manufacturing errors, installation errors, equipment faults and the like, the geometric center line of a main shaft of the rotating machine is not completely superposed with a theoretical center line, when the rotating shaft rotates, the center line of the main shaft rotates around the theoretical center line by a certain angle, the numerical value is the difference of single-side percentage representation numerical values of two points corresponding to the diameter direction, and the maximum difference value is the maximum throw value of the position.
The circumferential surface of a thrust block at the non-driving end of the motor, the circumferential surface of an output coupling at the driving end of the motor, the circumferential surface of an input coupling of the gear box, the circumferential surface of the output coupling of the gear box and the circumferential surface of a sliding rotor of a guide bearing under the pump are respectively marked according to 8 equal parts.
A measuring head of the dial indicator A is arranged in the X direction of the circumferential end face of the thrust block at the non-driving end of the motor and is vertical to a shaft system, and a gauge seat is fixed on a machine frame on the motor.
A measuring head of a dial indicator B is arranged in the X direction of the circumferential end face of an output coupling at the driving end of the motor and is vertical to a shaft system, and a gauge stand is fixed on a lower rack of the motor.
The measuring head of the dial indicator C is arranged in the X direction of the circumferential end face of the input coupling of the gear box and is vertical to the shaft system, and the gauge stand is fixed on the upper cover of the gear box.
The measuring head of the dial indicator D is arranged in the X direction of the circumferential end face of the gear box output coupling and is vertical to a shaft system, and the gauge stand is fixed on the gear box base.
The measuring head of the dial indicator E is arranged in the X direction of the circumferential end face of the sliding rotor of the lower guide bearing of the pump and is vertical to a shaft system, and the gauge stand is fixed on the guide bearing stand of the pump.
Readings from the dial indicators 1-5 are read at 8 equal division marks, respectively, at each dial indicator position by slowly rotating the motor shaft 360 degrees.
Calculating the shafting throw, wherein the throw of a driving end and a non-driving end of a motor shaft is less than or equal to 0.10 mm; the input shaft throw of the gear box is less than or equal to 0.10 mm; the swing of the output shaft of the gear box is less than or equal to 0.28 mm; the pump shaft sliding rotor throw is less than or equal to 0.15 mm;
calculating the maximum throw of a shaft system: and respectively calculating the non-driving end and end driving end swinging degree of the motor shaft, the input shaft swinging degree of the gear box, the output shaft swinging degree of the gear box and the maximum swinging degree of the pump shaft sliding rotor according to the indicating numbers of the dial indicators A-E.
When the shafting throw of a certain position exceeds the standard, the shafting deviation needs to be adjusted or fault points exist in equipment corresponding to the position and need to be checked and processed in a targeted manner.
As shown in fig. 1, the large vertical circulating water pump mainly comprises a motor, a planetary reduction gear box and a concrete volute pump, wherein a driving motor is connected with the gear box through a coupler, the driving motor transmits power to an output coupler after being reduced by a planetary core package, and the coupler is connected with a pump shaft to drive the water pump to work.
The invention relates to a method for detecting installation quality of a large vertical circulating water pump shafting throw, which is to detect the installation quality of a pump set and the quality of equipment by using a shafting throw measuring method. The method comprises the steps that 5 dial indicators arranged at different positions are arranged, the shaft of a dial rotor rotates 360 degrees, the readings of the 5 dial indicators are respectively read, and the shafting pendulum values at all positions are measured;
step 1: the vertical direction of the pump shaft is defined as the Y direction, and the direction perpendicular to the Y direction in the horizontal plane is defined as the X direction.
Step 2: the definition of shafting throw means that when a large vertical rotating machine is installed, due to the influence of various factors such as equipment manufacturing errors, installation errors, equipment quality defects and the like, the geometric center line of a main shaft of the rotating machine is not completely superposed with a theoretical center line, when the rotating shaft rotates, the center line of the main shaft rotates around the theoretical center line by a certain angle, the numerical value is the difference of single-side percentage representation numerical values of two points corresponding to the diameter direction, and the maximum difference value is the maximum throw value of the position.
And step 3: five positions of the circumferential surface of the thrust block at the non-driving end of the motor, the circumferential surface of the output coupling at the driving end of the motor, the circumferential surface of the input coupling of the gear box, the circumferential surface of the output coupling of the gear box and the circumferential surface of the sliding rotor of the guide bearing under the pump are respectively marked according to 8 equal parts and then are used as reading positions of the dial indicator.
And 4, step 4: a measuring head of the dial indicator A is arranged in the X direction of the circumferential end face of the thrust block at the non-driving end of the motor and is vertical to a shaft system, and a gauge seat is fixed on a machine frame on the motor.
And 5: a measuring head of a dial indicator B is arranged in the X direction of the circumferential end face of an output coupling at the driving end of the motor and is vertical to a shaft system, and a gauge stand is fixed on a lower rack of the motor.
Step 6: the measuring head of the dial indicator C is arranged in the X direction of the circumferential end face of the input coupling of the gear box and is vertical to the shaft system, and the gauge stand is fixed on the upper cover of the gear box.
And 7: the measuring head of the dial indicator D is arranged in the X direction of the circumferential end face of the gear box output coupling and is vertical to a shaft system, and the gauge stand is fixed on the gear box base.
And 8: the measuring head of the dial indicator E is arranged in the X direction of the circumferential end face of the sliding rotor of the lower guide bearing of the pump and is vertical to a shaft system, and the gauge stand is fixed on the guide bearing stand of the pump.
And step 9: by slowly rotating the motor shaft 360 deg., 5 blocks of the dial indicator are read at 5 positions 8 equally spaced marks in step 4.
Step 10: determining a swing standard according to experience, wherein the swing of a driving end and a non-driving end of a motor shaft is less than or equal to 0.10 mm; the input shaft throw of the gear box is less than or equal to 0.10 mm; the swing of the output shaft of the gear box is less than or equal to 0.28 mm; the pump shaft sliding rotor throw is less than or equal to 0.15 mm;
step 11: and (4) calculating the maximum throw of the shafting (the throw value is calculated by the difference of percentage representation numbers of two points corresponding to the diameter direction, four groups of throw values are calculated by eight points in each position, and the maximum value is the maximum throw value of the position shafting). And respectively calculating the maximum throw of a thrust head at the non-driving end of the motor shaft, the maximum throw at the output coupling of the driving end, the maximum throw of an input shaft of the gear box, the throw of an output shaft of the gear box and the maximum throw of a sliding rotor of a pump shaft according to the readings of the dial indicators A-E.
Step 12: comparing and analyzing the five position maximum swing values calculated in the step 11 with the reference in the step 10, and when the five position maximum swing values are within an allowable range, indicating that the mounting quality of the pump set and the quality of the equipment are qualified; when some position or positions exceed the reference in step 10, it indicates that the shafting has deviation and needs to be adjusted or a fault point exists inside the equipment corresponding to the position and needs to be checked and processed in a targeted manner.
Claims (7)
1. A method for detecting installation quality of large vertical circulating water pump shafting throw is characterized in that:
step 1: defining the vertical direction of a pump shaft as the Y direction, and defining the direction vertical to the Y direction in a horizontal plane as the X direction;
step 2: defining shafting throw, namely, when a large vertical rotating machine is installed, the geometric center line of a main shaft of the rotating machine is not completely superposed with a theoretical center line, when a rotating shaft rotates, the center line of the main shaft rotates around the theoretical center line at a certain angle, the numerical value is the difference of single-side percentage representation numerical values of two points corresponding to the diameter direction, and the maximum difference value is the maximum throw value of the position;
and step 3: marking five positions of the circumferential surface of a thrust block at the non-driving end of the motor, the circumferential surface of an output coupling at the driving end of the motor, the circumferential surface of an input coupling of the gear box, the circumferential surface of the output coupling of the gear box and the circumferential surface of a sliding rotor of a guide bearing under the pump according to 8 equal parts respectively, and then taking the five positions as reading positions of a dial indicator;
and 4, step 4: the measuring head of the dial indicator A is arranged in the X direction of the circumferential end face of the thrust block at the non-driving end of the motor and is vertical to a shaft system, and the gauge seat is fixed on an upper frame of the motor;
and 5: a measuring head of a dial indicator B is arranged in the X direction of the circumferential end face of an output coupling at the driving end of the motor and is vertical to a shaft system, and a gauge stand is fixed on a lower rack of the motor;
step 6: the measuring head of the dial indicator C is arranged in the X direction of the circumferential end face of the input coupling of the gear box and is vertical to a shaft system, and the gauge stand is fixed on the upper cover of the gear box;
and 7: the measuring head of the dial indicator D is arranged in the X direction of the circumferential end face of the output coupling of the gear box and is vertical to a shaft system, and the gauge stand is fixed on the base of the gear box;
and 8: the measuring head of the dial indicator E is arranged in the X direction of the circumferential end face of a sliding rotor of a lower guide bearing of the pump and is vertical to a shaft system, and a gauge stand is fixed on a guide bearing stand of the pump;
and step 9: by slowly rotating the motor shaft 360 °, 5 dial indicators were read at 5 positions 8 equally spaced marks in step 4;
step 10: determining a swing degree reference according to experience;
step 11: calculating the maximum throw of a shaft system, and respectively calculating the maximum throw of a thrust head of a non-driving end of a motor, the maximum throw of an output coupler of a driving end of the motor, the maximum throw of an input shaft of a gear box, the maximum throw of an output shaft of the gear box and the maximum throw of a sliding rotor of a guide bearing under a pump according to the readings of the dial indicators A-E;
step 12: comparing and analyzing the five position maximum swing values calculated in the step 11 with the reference in the step 10, and when the five position maximum swing values are all in an allowable range, indicating that the installation quality of the pump set and the quality of equipment are qualified; when some position or positions exceed the reference in step 10, it indicates that the shafting has deviation and needs to be adjusted or a fault point exists inside the equipment corresponding to the position and needs to be checked and processed in a targeted manner.
2. The method for detecting the installation quality of the large vertical circulating water pump shafting throw according to claim 1, characterized in that: the shafting throw is influenced by equipment manufacturing error, installation error and equipment quality defect factors.
3. The method for detecting the installation quality of the large vertical circulating water pump shafting throw according to claim 1, characterized in that: the step 10: the swing degrees of the driving end and the non-driving end of the motor shaft are less than or equal to 0.10 mm.
4. The method for detecting the installation quality of the large vertical circulating water pump shafting throw according to claim 1, characterized in that: the step 10: the input shaft throw of the gear box is less than or equal to 0.10 mm.
5. The method for detecting the installation quality of the large vertical circulating water pump shafting throw according to claim 1, characterized in that: the step 10: the swing of the output shaft of the gear box is less than or equal to 0.28 mm.
6. The method for detecting the installation quality of the large vertical circulating water pump shafting throw according to claim 1, characterized in that: the step 10: the swing of the guide bearing and the sliding rotor under the pump is less than or equal to 0.15 mm.
7. The method for detecting the installation quality of the large vertical circulating water pump shafting throw according to claim 1, characterized in that: the step 11: the method for calculating the maximum throw of the shafting is characterized in that the difference of percentage representation numbers of two points corresponding to the diameter direction is adopted, four groups of throw values are calculated corresponding to eight points in each position, and the maximum value is the maximum throw value of the position shafting.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113092096A (en) * | 2021-04-13 | 2021-07-09 | 哈动国家水力发电设备工程技术研究中心有限公司 | Guide bearing parameter-based hydraulic turbine runner damage detection method |
| CN113883068A (en) * | 2021-09-28 | 2022-01-04 | 江苏省水利科学研究院 | Method and system for detecting main shaft throw of vertical water pump unit |
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| 李志红等: "立式水轮机组的摆度测量分析", 《南昌工程学院学报》 * |
| 陈坤池等: "FQHDL35型海水循环泵齿轮箱轴系摆度超标原因", 《设备管理与维修》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113092096A (en) * | 2021-04-13 | 2021-07-09 | 哈动国家水力发电设备工程技术研究中心有限公司 | Guide bearing parameter-based hydraulic turbine runner damage detection method |
| CN113883068A (en) * | 2021-09-28 | 2022-01-04 | 江苏省水利科学研究院 | Method and system for detecting main shaft throw of vertical water pump unit |
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