CN113883068A - Method and system for detecting main shaft throw of vertical water pump unit - Google Patents
Method and system for detecting main shaft throw of vertical water pump unit Download PDFInfo
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- CN113883068A CN113883068A CN202111139687.3A CN202111139687A CN113883068A CN 113883068 A CN113883068 A CN 113883068A CN 202111139687 A CN202111139687 A CN 202111139687A CN 113883068 A CN113883068 A CN 113883068A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0088—Testing machines
Abstract
The invention discloses a method and a system for detecting the main shaft throw of a vertical water pump unit in the technical field of maintenance and detection of the vertical water pump unit. The method comprises the following steps: s1: respectively arranging a plurality of displacement sensors at different detection positions of the main shaft to acquire displacement of the main shaft corresponding to the detection positions during rotation; s2: installing an angle sensor at the top of the main shaft to acquire the rotation angle of the main shaft; s3: rotating the main shaft, and acquiring rotation angle data and displacement data in real time during rotation; s4: calculating a swing degree value of a corresponding detection position of the main shaft according to the acquired rotation angle data and the acquired displacement data; and S5, comparing the swing values of the detection positions with corresponding preset values respectively, and if the absolute value of any swing value is greater than the corresponding preset value, determining that the spindle swing detection is unqualified. The method has high measurement precision and can avoid missing detection, thereby more accurately judging the situation of the main shaft throw.
Description
Technical Field
The invention relates to the technical field of maintenance and detection of large-scale vertical water pump units in hydraulic engineering, in particular to a method and a system for detecting the main shaft throw of a vertical water pump unit.
Background
The large-scale vertical water pump unit of hydraulic engineering mainly has two structural forms of an axial flow pump and a mixed flow pump, and mainly comprises a motor part (a stator, a rotor, an upper frame, a lower frame, a motor shaft, a bearing and the like) and a water pump part (an impeller, an impeller shell, a guide vane body, a water pump shaft, a bearing and the like). Namely, the main shaft of the vertical water pump unit comprises a motor shaft and a water pump shaft.
When the pump assembly is operating, the optimum condition is for the centre line of the main shaft to rotate about the theoretical centre line, but in practice this is difficult to achieve. The shaft has run-out value caused by the manufacturing precision deviation in the manufacturing process, and the shaft are connected in the connecting process due to manufacturing tolerance, errors in installation, accumulated errors after installation, deflection deformation caused by transportation and storage, and the like, so that the center line of the shaft in the running process runs around a track with a certain deflection angle and radius deviated from the theoretical center line. This phenomenon is called throw of the axis. The excessive swing of the unit can cause the phenomena of aggravation of bearing abrasion, abnormal vibration of the unit, reduction of the efficiency of the unit, shortening of the service life of equipment and the like, and the normal operation of the water pump unit can be influenced in serious cases.
Therefore, a convenient spindle throw detection method is urgently needed in daily maintenance of the water pump unit to detect whether the spindle throw is qualified or not, so that potential problems of the spindle are found and the spindle is maintained in time to reduce loss.
Disclosure of Invention
The application provides a method and a system for detecting the main shaft throw of a vertical water pump unit, and solves the problem that the main shaft throw of the water pump unit in the prior art is inconvenient to detect, so that the main shaft throw is conveniently detected, and whether the main shaft throw is qualified or not is effectively judged.
The embodiment of the application provides a method for detecting the main shaft throw of a vertical water pump unit, which comprises the following steps:
s1: respectively arranging a plurality of displacement sensors at different detection positions of a main shaft, wherein the plurality of displacement sensors are used for acquiring displacement of the main shaft corresponding to the detection positions during rotation;
s2: installing an angle sensor at the top of the main shaft, wherein the angle sensor is used for collecting the rotation angle of the main shaft;
s3: rotating the main shaft by 360 degrees, and acquiring rotation angle data acquired by the angle sensors and displacement data acquired by a plurality of displacement sensors in real time during rotation;
s4: calculating a throw value of the spindle corresponding to the detection position according to the acquired rotation angle data and the acquired displacement data;
and S5, respectively comparing the swing values of the detection positions with corresponding preset values, and if the absolute value of any swing value is greater than the corresponding preset value, determining that the spindle swing detection is unqualified.
The beneficial effects of the above embodiment are as follows: the internal space of the water pump unit is narrow, the visual angle of a detection instrument is easily blocked when the detection instrument is manually observed, so that the data reading is difficult and easy to make mistakes, the main shaft rotation angle data are collected by the angle sensor, the displacement of each detection position is detected by the displacement sensor, the manual observation error is removed, and the measurement precision is high; meanwhile, relevant data are continuously acquired in the rotation process of the main shaft, and the phenomenon of missing detection caused by small data acquisition amount is avoided, so that the throw condition of the main shaft is more accurately judged.
On the basis of the above embodiments, the present application can be further improved, specifically as follows:
in one embodiment of this application, in step S1, displacement sensor is provided with five, is displacement sensor a, displacement sensor B, displacement sensor C, displacement sensor D and displacement sensor E respectively in proper order, five displacement sensor install respectively in the epaxial guide journal position of motor of main shaft, the lower guide journal position of motor shaft, the shaft coupling position of motor shaft, the sealed journal position of department of water pump shaft packing and the lower bearing journal position of water pump shaft. The five detection positions are all mechanical finish machining positions, the jumping amount of the five detection positions is generally within 0.02mm, and the inherent machining errors can be reduced when the five detection positions are measured; the large part detection position is a bearing position, and the swing amount of the large part detection position can truly reflect the actual operation condition of the unit.
In one embodiment of this application, the step S3 further includes: and calculating the acquired displacement data, and if the maximum difference value is greater than a set value, judging that the acquired data is invalid. After the invalidation is determined, the invalidation reason needs to be manually checked and analyzed, and the step S3 is executed again after the deviation is rectified.
In one embodiment of the present application, in the step S4, the swing value includes a full swing value, an absolute swing value, and a relative swing value. The wear of the main shaft, the vibration of the unit, the service life of the equipment and the like can be well reflected by the three values.
In one embodiment of the present application, the swing value is calculated as follows:
setting i as the rotation angle acquired by the angle sensor, and setting the displacement acquired by the displacement sensor A corresponding to the current rotation angle as AiThe displacement quantity acquired by the displacement sensor B is BiThe displacement quantity acquired by the displacement sensor C is CiThe displacement quantity acquired by the displacement sensor D is DiThe displacement quantity collected by the displacement sensor E is EiAnd acquiring rotation angle data and displacement data once when the main shaft rotates for a degrees, wherein a can divide 180 completely, and then:
full-swing numerical value G of guide shaft neck on motor shaftj＝Ai-Ai+180，j＝1～180/a；
Full-swing numerical value H of lower guide shaft neck of motor shaftj＝Bi-Bi+180，j＝1～180/a；
Full swing numerical value I of side surface of motor shaft couplerj＝Ci-Ci+180，j＝1～180/a；
Full-throw numerical value J of shaft neck at packing sealing position of water pump shaftj＝Di-Di+180，j＝1～180/a；
Full-swing numerical value K of lower bearing journal of water pump shaftj＝Ei-Ei+180，j＝1～180/a；
Motor shaft lower guide journal absolute swing numerical value Lj＝Hj-Gj，j＝1～180/a；
Absolute swing numerical value M of side surface of motor shaft couplerj＝Ij-Gj，j＝1～180/a；
Absolute throw value N of shaft neck at packing seal position of water pump shaftj＝Jj-Gj，j＝1～180/a；
Absolute throw value O of lower bearing journal of water pump shaftj＝Kj-Gj，j＝1～180/a；
Relative throw value P of lower guide journal of motor shaftj＝Lj/Z1，j＝1～180/a，Z1The distance from the motor mirror plate to a lower guide journal of the motor shaft is obtained;
numerical value Q of relative swing of side surface of motor shaft couplerj＝Mj/Z2，j＝1～180/a，Z2The distance from the motor mirror plate to the coupling;
journal relative swing numerical value R at water pump shaft packing seal positionj＝Nj/Z3，j＝1～180/a，Z3The distance between a motor mirror plate and a shaft neck at the position of a water pump shaft packing seal is determined;
relative throw value S of lower bearing journal of water pump shaftj＝Oj/Z4，j＝1～180/a，Z4The distance from the motor mirror plate to the lower bearing journal of the water pump. The absolute swing degree is also called net swing degree, the processor sets a program according to the calculation mode, and the data processing amount is set according to the requirement, so that each swing degree value is calculated automatically after data are obtained, and the detection efficiency is improved.
In one embodiment of the present application, the step S5 specifically includes:
and sequentially selecting the maximum absolute value of the full swing degree value, the maximum absolute value of the absolute swing degree value and the maximum absolute value of the relative swing degree value of each detection position, comparing the maximum absolute value of the full swing degree value, the maximum absolute value of the absolute swing degree value and the maximum absolute value of the relative swing degree value with the corresponding preset values, if any one of the maximum absolute value of the full swing degree value, the maximum absolute value of the absolute swing degree value and the maximum absolute value of the relative swing degree value is larger than the corresponding preset value, prompting that a fault exists in the corresponding detection position, and judging that the spindle swing degree detection is unqualified. The processor sets a program according to the rule, so that the programs are automatically compared and judged after the swing values are obtained, the positions of qualified main shaft swing or unqualified main shaft swing and fault detection are output, and the detection efficiency is improved.
The embodiment of the present application further provides a detection system for the spindle throw of a vertical water pump unit, where the detection system adopts the above detection method, and the detection system includes:
the angle sensor is arranged at the top of the main shaft and is used for acquiring the rotation angle of the main shaft;
the displacement sensors are respectively arranged at different detection positions of the main shaft and are respectively used for collecting displacement of the main shaft corresponding to the detection positions when the main shaft rotates;
the processor is electrically connected with the angle sensor and the displacement sensor and used for acquiring the rotation angle data acquired by the angle sensor and the displacement data acquired by the displacement sensor and judging whether the spindle throw detection is qualified or not according to the acquired rotation angle data and the acquired displacement data. The angle sensor is adopted to collect the main shaft rotation angle data, the displacement sensor is adopted to detect the displacement of each detection position, the manual observation error is removed, and the measurement precision is high; meanwhile, relevant data are continuously acquired in the rotation process of the main shaft, and the phenomenon of missing detection caused by small data acquisition amount is avoided, so that the throw condition of the main shaft is more accurately judged.
In one embodiment of the present application, the detection system further includes a driving mechanism configured to drive the spindle to rotate.
In one of the embodiments of this application, displacement sensor is provided with five, is displacement sensor A, displacement sensor B, displacement sensor C, displacement sensor D and displacement sensor E respectively in proper order, five displacement sensor install in respectively in the epaxial pilot journal position of motor of main shaft, the lower pilot journal position of motor shaft, the shaft coupling position of motor shaft, water pump axle packing seal department journal position and the lower bearing journal position of water pump axle of main shaft in proper order.
In one embodiment of the present application, the angle sensor and the displacement sensor each have a wireless transmission function. Angle sensor and displacement sensor pass through wireless transmission with the data transmission who gathers to the treater, have reduced mixed and disorderly wiring, more are fit for the situation that the internal space of water pump unit is short.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
1. the angle sensor is adopted to collect the main shaft rotation angle data, the displacement sensor is adopted to detect the displacement of each detection position, the manual observation error is removed, and the measurement precision is high;
2. relevant data are continuously acquired in the rotation process of the main shaft, so that the phenomenon of missing detection caused by small data acquisition amount is avoided, and the swing degree condition of the main shaft is more accurately judged;
3. after the processor sets a program, the processor can automatically calculate each swing value after acquiring data and output a detection result, thereby improving the detection efficiency.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a flow chart of steps of a method for detecting the spindle throw of a vertical water pump unit according to the invention;
fig. 2 is a schematic structural diagram of a system for detecting the spindle throw of the vertical water pump unit.
The device comprises a motor shaft 1, a motor shaft coupler 2, a water pump shaft 3, an angle sensor 4, a displacement sensor A5, a displacement sensor B6, a displacement sensor C7, a displacement sensor D8, a displacement sensor E9 and a displacement sensor E.
Detailed Description
The present invention is further illustrated by the following detailed description, which is to be construed as merely illustrative and not limitative of the remainder of the disclosure, and modifications and variations such as those ordinarily skilled in the art are intended to be included within the scope of the present invention as defined in the appended claims.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "vertical", "peripheral surface" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the present invention are conventionally placed when used, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or the element to which the present invention is directed must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The embodiment of the application provides a method and a system for detecting the main shaft throw of a vertical water pump unit, and solves the problem that the main shaft throw of the water pump unit in the prior art is inconvenient to detect, so that the main shaft throw is conveniently detected, and whether the main shaft throw is qualified or not is effectively judged.
In order to solve the above problems, the technical solution in the embodiment of the present application has the following general idea:
the first embodiment is as follows:
as shown in fig. 1, a method for detecting the main shaft throw of a vertical water pump unit includes the following steps:
s1: the displacement sensors are respectively arranged at different detection positions of the main shaft and are used for acquiring displacement of the main shaft corresponding to the detection positions during rotation.
The displacement sensors are provided with five displacement sensors, namely a displacement sensor A, a displacement sensor B, a displacement sensor C, a displacement sensor D and a displacement sensor E, wherein the five displacement sensors are respectively and sequentially arranged at the position of a guide journal on a motor shaft of the main shaft, the position of a guide journal under the motor shaft, the position of a motor shaft coupler, the position of a journal at the position of a water pump shaft filler seal and the position of a bearing journal under the water pump shaft, correspondingly, the displacement sensors A, the displacement sensors B, the displacement sensor C, the displacement sensors D and the displacement sensors E are respectively used for detecting the positions of the guide journal on the motor shaft, the guide journal under the motor shaft, the motor shaft coupler, the displacements of the journal at the position of the water pump shaft filler seal and the bearing journal under the water pump shaft during rotation.
S2: the angle sensor is arranged at the top of the main shaft and used for collecting the rotation angle of the main shaft.
The resolution ratio of the angle sensor is not lower than 1 degree, the range is 0-360 degrees, and the angle sensor is used for recording the rotation angle of the water pump spindle barring gear.
S3: the main shaft is rotated by 360 degrees, and the rotation angle data collected by the angle sensor and the displacement data collected by the plurality of displacement sensors are obtained in real time during rotation.
Before the main shaft rotates, the angle sensor and each displacement sensor need to be reset, and the obtained displacement data is stored corresponding to the rotation angle data; and calculating the obtained displacement data after obtaining each displacement data, if the maximum difference value is larger than a set value, such as +/-0.02 mm, judging that the acquired data is invalid, analyzing the invalid reason by a detector, correcting the deviation, and then executing S3 again.
S4: and calculating the pendulum value of the main shaft corresponding to the detection position according to the acquired rotation angle data and the acquired displacement data.
The swing degree value comprises a full swing degree value, an absolute swing degree value and a relative swing degree value. The calculation modes of the full swing numerical value, the absolute swing numerical value and the relative swing numerical value are as follows:
setting i as the rotation angle collected by the angle sensor, and setting the displacement quantity collected by the displacement sensor A corresponding to the current rotation angle as AiThe displacement quantity acquired by the displacement sensor B is BiThe displacement quantity collected by the displacement sensor C is CiThe displacement quantity collected by the displacement sensor D is DiThe displacement quantity collected by the displacement sensor E is EiAcquiring rotation angle data and displacement data once every time the main shaft rotates for a degrees, wherein a can be divided by 180, and if a is 1, then:
full-swing numerical value G of guide shaft neck on motor shaftj＝Ai-Ai+180，j＝1～180；
Full-swing numerical value H of lower guide shaft neck of motor shaftj＝Bi-Bi+180，j＝1～180；
Full swing numerical value I of side surface of motor shaft couplerj＝Ci-Ci+180，j＝1～180；
Full-throw numerical value J of shaft neck at packing sealing position of water pump shaftj＝Di-Di+180，j＝1～180；
Full-swing numerical value K of lower bearing journal of water pump shaftj＝Ei-Ei+180，j＝1～180；
Motor shaft lower guide journal absolute swing numerical value Lj＝Hj-Gj，j＝1～180；
Absolute swing numerical value M of side surface of motor shaft couplerj＝Ij-Gj，j＝1～180；
Absolute throw value N of shaft neck at packing seal position of water pump shaftj＝Jj-Gj，j＝1～180；
Absolute throw value O of lower bearing journal of water pump shaftj＝Kj-Gj，j＝1～180；
Relative throw value P of lower guide journal of motor shaftj＝Lj/Z1，j＝1～180，Z1The distance from the motor mirror plate to a lower guide journal of the motor shaft is obtained;
numerical value Q of relative swing of side surface of motor shaft couplerj＝Mj/Z2，j＝1～180，Z2The distance from the motor mirror plate to the coupling;
journal relative swing numerical value R at water pump shaft packing seal positionj＝Nj/Z3，j＝1～180，Z3The distance between a motor mirror plate and a shaft neck at the position of a water pump shaft packing seal is determined;
relative throw value S of lower bearing journal of water pump shaftj＝Oj/Z4，j＝1～180，Z4The distance from the motor mirror plate to the lower bearing journal of the water pump.
And S5, comparing the swing values of the detection positions with corresponding preset values respectively, and if the absolute value of any swing value is greater than the corresponding preset value, determining that the spindle swing detection is unqualified.
And sequentially selecting the maximum absolute value of the full swing degree numerical value, the maximum absolute value of the absolute swing degree numerical value and the maximum absolute value of the relative swing degree numerical value of each detection position, comparing the maximum absolute value of the full swing degree numerical value, the maximum absolute value of the absolute swing degree numerical value and the maximum absolute value of the relative swing degree numerical value with corresponding preset values, if any one of the maximum absolute value of the full swing degree numerical value, the maximum absolute value of the absolute swing degree numerical value and the maximum absolute value of the relative swing degree numerical value is larger than the corresponding preset value, prompting that a fault exists in the corresponding detection position, and judging that the spindle swing degree detection is unqualified.
If the preset values are divided into different limit values according to the spindle rotation speed, the spindle rotation speed needs to be recorded simultaneously when the displacement data are acquired, so that the maximum absolute value of the full swing numerical value, the maximum absolute value of the absolute swing numerical value and the maximum absolute value of the relative swing numerical value of each detection position are respectively compared with the corresponding preset values in step S5.
Example two:
as shown in fig. 2, a detection system for the main shaft throw of a vertical water pump unit adopts the above detection method, the main shaft sequentially comprises a motor shaft 1, a motor shaft coupler 2 and a water pump shaft 3 from top to bottom, and the detection system comprises: an angle sensor 4, five displacement sensors, a driving mechanism (not shown in the figure) and a processor (not shown in the figure);
the angle sensor is arranged at the top of the main shaft, has a wireless transmission function and is used for acquiring the rotation angle of the main shaft and sending the rotation angle to the processor;
the five displacement sensors are respectively and sequentially a displacement sensor A5, a displacement sensor B6, a displacement sensor C7, a displacement sensor D8 and a displacement sensor E9, the five displacement sensors are respectively and sequentially arranged at the position of a guide shaft neck on a motor shaft of the main shaft, the position of a guide shaft neck below the motor shaft, the position of a shaft joint at the position of a motor shaft coupler, the position of a shaft neck at a water pump shaft packing seal and the position of a bearing shaft neck below the water pump shaft, the displacement sensors have a wireless transmission function, and the five displacement sensors are respectively used for acquiring the displacement of a corresponding detection position when the main shaft rotates and sending the displacement to the processor;
the processor is used for acquiring the rotation angle data acquired by the angle sensor and the displacement data acquired by the displacement sensor, and judging whether the spindle throw detection is qualified or not according to the acquired rotation angle data and the acquired displacement data.
Optionally, the detection system further includes a driving mechanism, and the driving mechanism is configured to drive the spindle to rotate.
The technical scheme in the embodiment of the application at least has the following technical effects or advantages:
1. the angle sensor is adopted to collect the main shaft rotation angle data, the displacement sensor is adopted to detect the displacement of each detection position, the manual observation error is removed, and the measurement precision is high;
2. relevant data are continuously acquired in the rotation process of the main shaft, so that the phenomenon of missing detection caused by small data acquisition amount is avoided, and the swing degree condition of the main shaft is more accurately judged;
3. after the processor sets a program, the processor can automatically calculate each swing value after acquiring data and output a detection result, thereby improving the detection efficiency.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A method for detecting the main shaft throw of a vertical water pump unit is characterized by comprising the following steps:
s1: respectively arranging a plurality of displacement sensors at different detection positions of a main shaft, wherein the plurality of displacement sensors are used for acquiring displacement of the main shaft corresponding to the detection positions during rotation;
s2: installing an angle sensor at the top of the main shaft, wherein the angle sensor is used for collecting the rotation angle of the main shaft;
s3: rotating the main shaft by 360 degrees, and acquiring rotation angle data acquired by the angle sensors and displacement data acquired by a plurality of displacement sensors in real time during rotation;
s4: calculating a throw value of the spindle corresponding to the detection position according to the acquired rotation angle data and the acquired displacement data;
and S5, respectively comparing the swing values of the detection positions with corresponding preset values, and if the absolute value of any swing value is greater than the corresponding preset value, determining that the spindle swing detection is unqualified.
2. The detection method according to claim 1, characterized in that: in the step S1, the displacement sensors include five displacement sensors, which are respectively a displacement sensor a, a displacement sensor B, a displacement sensor C, a displacement sensor D and a displacement sensor E, and the five displacement sensors are respectively and sequentially installed at a position of a guide journal on a motor shaft of the main shaft, a position of a guide journal below the motor shaft, a position of a coupling of the motor shaft, a position of a journal at a packing seal of the water pump shaft, and a position of a bearing journal below the water pump shaft.
3. The detecting method according to claim 1, wherein in step S3, the method further comprises: and calculating the acquired displacement data, and if the maximum difference value is greater than a set value, judging that the acquired data is invalid.
4. The detection method according to claim 2, characterized in that: in step S4, the swing value includes a full swing value, an absolute swing value, and a relative swing value.
5. The detection method according to claim 4, characterized in that: the pendulum value is calculated in the following way:
setting i as the rotation angle acquired by the angle sensor, and setting the displacement acquired by the displacement sensor A corresponding to the current rotation angle as AiThe displacement quantity acquired by the displacement sensor B is BiThe displacement quantity acquired by the displacement sensor C is CiThe displacement quantity acquired by the displacement sensor D is DiThe displacement quantity collected by the displacement sensor E is EiAnd acquiring rotation angle data and displacement data once when the main shaft rotates for a degrees, wherein a can divide 180 completely, and then:
full-swing numerical value G of guide shaft neck on motor shaftj＝Ai-Ai+180，j＝1～180/a；
Full-swing numerical value H of lower guide shaft neck of motor shaftj＝Bi-Bi+180，j＝1～180/a；
Full swing numerical value I of side surface of motor shaft couplerj＝Ci-Ci+180，j＝1～180/a；
Full-throw numerical value J of shaft neck at packing sealing position of water pump shaftj＝Di-Di+180，j＝1～180/a；
Full-swing numerical value K of lower bearing journal of water pump shaftj＝Ei-Ei+180，j＝1～180/a；
Motor shaft lower guide journal absolute swing numerical value Lj＝Hj-Gj，j＝1～180/a；
Absolute swing numerical value M of side surface of motor shaft couplerj＝Ij-Gj，j＝1～180/a；
Absolute throw value N of shaft neck at packing seal position of water pump shaftj＝Jj-Gj，j＝1～180/a；
Absolute throw value O of lower bearing journal of water pump shaftj＝Kj-Gj，j＝1～180/a；
Relative throw value P of lower guide journal of motor shaftj＝Lj/Z1，j＝1～180/a，Z1The distance from the motor mirror plate to a lower guide journal of the motor shaft is obtained;
numerical value Q of relative swing of side surface of motor shaft couplerj＝Mj/Z2，j＝1～180/a，Z2The distance from the motor mirror plate to the coupling;
journal relative swing numerical value R at water pump shaft packing seal positionj＝Nj/Z3，j＝1～180/a，Z3The distance between the shaft neck of the motor mirror plate and the shaft filler seal of the water pump；
Relative throw value S of lower bearing journal of water pump shaftj＝Oj/Z4，j＝1～180/a，Z4The distance from the motor mirror plate to the lower bearing journal of the water pump.
6. The detection method according to claim 4, characterized in that: the step S5 specifically includes:
and sequentially selecting the maximum absolute value of the full swing degree value, the maximum absolute value of the absolute swing degree value and the maximum absolute value of the relative swing degree value of each detection position, comparing the maximum absolute value of the full swing degree value, the maximum absolute value of the absolute swing degree value and the maximum absolute value of the relative swing degree value with the corresponding preset values, if any one of the maximum absolute value of the full swing degree value, the maximum absolute value of the absolute swing degree value and the maximum absolute value of the relative swing degree value is larger than the corresponding preset value, prompting that a fault exists in the corresponding detection position, and judging that the spindle swing degree detection is unqualified.
7. A detection system employing the detection method according to any one of claims 1 to 6, comprising:
the angle sensor is arranged at the top of the main shaft and is used for acquiring the rotation angle of the main shaft;
the displacement sensors are respectively arranged at different detection positions of the main shaft and are respectively used for collecting displacement of the main shaft corresponding to the detection positions when the main shaft rotates;
the processor is electrically connected with the angle sensor and the displacement sensor and used for acquiring the rotation angle data acquired by the angle sensor and the displacement data acquired by the displacement sensor and judging whether the spindle throw detection is qualified or not according to the acquired rotation angle data and the acquired displacement data.
8. The detection system of claim 7, wherein: the detection system further comprises a driving mechanism, and the driving mechanism is used for driving the main shaft to rotate.
9. The detection system of claim 7, wherein: the displacement sensors are arranged in five, and are respectively a displacement sensor A, a displacement sensor B, a displacement sensor C, a displacement sensor D and a displacement sensor E in sequence, and the five displacement sensors are respectively and sequentially arranged at the position of a guide journal on a motor shaft of the main shaft, the position of a guide journal under the motor shaft, the position of a coupling of the motor shaft, the position of a journal at the sealing position of a packing of the water pump shaft and the position of a bearing journal under the water pump shaft.
10. The detection system of claim 7, wherein: the angle sensor and the displacement sensor both have a wireless transmission function.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113295412A (en) * | 2021-05-26 | 2021-08-24 | 华能澜沧江水电股份有限公司 | Method for detecting reason of unbalanced stress of guide bearing of vertical water turbine generator set |
| CN114856900A (en) * | 2022-04-22 | 2022-08-05 | 吉林农业科技学院 | Axis adjustment auxiliary device and method for water turbine generator set |
| CN115077364A (en) * | 2022-05-13 | 2022-09-20 | 华电电力科学研究院有限公司 | Device and method for measuring axis of hydroelectric generating set |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106679599A (en) * | 2016-12-02 | 2017-05-17 | 长春工程学院 | Hydroelectric set axis measurement device |
| CN210833382U (en) * | 2019-12-27 | 2020-06-23 | 张宏杰 | Vertical hydroelectric generating set axis adjusting device |
| CN112268689A (en) * | 2020-09-21 | 2021-01-26 | 福建福清核电有限公司 | Method for detecting installation quality of shafting throw of large vertical circulating water pump |
-
2021
- 2021-09-28 CN CN202111139687.3A patent/CN113883068A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106679599A (en) * | 2016-12-02 | 2017-05-17 | 长春工程学院 | Hydroelectric set axis measurement device |
| CN210833382U (en) * | 2019-12-27 | 2020-06-23 | 张宏杰 | Vertical hydroelectric generating set axis adjusting device |
| CN112268689A (en) * | 2020-09-21 | 2021-01-26 | 福建福清核电有限公司 | Method for detecting installation quality of shafting throw of large vertical circulating water pump |
Non-Patent Citations (1)
| Title |
|---|
| 范道芝: "功果桥水电站水轮发电机组轴线调整及总装", 《科技创新导报》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113295412A (en) * | 2021-05-26 | 2021-08-24 | 华能澜沧江水电股份有限公司 | Method for detecting reason of unbalanced stress of guide bearing of vertical water turbine generator set |
| CN113295412B (en) * | 2021-05-26 | 2022-10-11 | 华能澜沧江水电股份有限公司 | Method for detecting cause of unbalanced stress of guide bearing of vertical water turbine generator set |
| CN114856900A (en) * | 2022-04-22 | 2022-08-05 | 吉林农业科技学院 | Axis adjustment auxiliary device and method for water turbine generator set |
| CN114856900B (en) * | 2022-04-22 | 2024-04-09 | 吉林农业科技学院 | Axis adjustment auxiliary device and method for hydroelectric generating set |
| CN115077364A (en) * | 2022-05-13 | 2022-09-20 | 华电电力科学研究院有限公司 | Device and method for measuring axis of hydroelectric generating set |
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