CN105275790A - Method for adjusting nuclear power station and loop coolant pump - Google Patents
Method for adjusting nuclear power station and loop coolant pump Download PDFInfo
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- CN105275790A CN105275790A CN201510749755.6A CN201510749755A CN105275790A CN 105275790 A CN105275790 A CN 105275790A CN 201510749755 A CN201510749755 A CN 201510749755A CN 105275790 A CN105275790 A CN 105275790A
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Abstract
The invention relates to the technical field of machine adjusting and testing, in particular to a method for adjusting a nuclear power station and loop coolant pump. The method is used for dynamic balance fine adjustment after a motor of the nuclear power station and loop coolant pump is replaced. The vibration vector of a coolant pump and the vibration vector of a new motor are calculated and determined on a non-critical path, so that dynamic balance of a pump-motor system with the replaced new motor is fine adjusted, the situation that dynamic balance tests are carried out again is avoided, the balance adjustment cycle is greatly shortened, economic benefits are effectively improved, and radiation dosage is reduced for staff. Particularly, in actual application, the single-item adjustment process can be at least shortened by over 12 hours, manpower investment of each profession of the dynamic balance tests is reduced by 15 persons, and the outside radiation dosage is reduced by 300 micro sieverts for each of all staff.
Description
Technical field
The present invention relates to machinery adjustment technical field of measurement and test, be specifically related to a kind of adjusting method of one loop of nuclear power station coolant pump.
Background technique
In nuclear power station technical field of power generation, the cardinal principle of nuclear energy power generation is that a large amount of heat energy utilizing nuclear fission to discharge heat water, then utilizes the Steam Actuation steam turbine generator of formation to generate electricity, thermal energy is become the process of electric energy.Nuclear fission is carried out and produce power in reactor assembly, and by above-mentioned energy water to be heated and the process that utilizes the Steam Actuation steam turbine generator produced to generate electricity all is carried out in reactor assembly outside, therefore, the conduction of the energy security adopting certain mode nuclear fission in reactor assembly to be produced is needed out.
Existing nuclear power station adopts primary Ioops system to adopt the mode of energy interchange that produce power in reactor assembly is conducted to outside usually, concrete: the reactor core of reactor assembly utilizes fuel fission to produce huge heat energy, by main pump pump into reactor core cooling water absorb heap in-core energy heated after from heap in-core export, the freezing mixture absorbed after energy flows through the heat transfer U-tube in steam generator, by tube wall by thermal energy transfer to the secondary circuit cooling water outside U-tube, sent back to reactor core by main pump again after release heat and re-start energy interchange, again enter steam generator after output and carry out energy interchange, cooling water is so constantly at airtight loop Inner eycle, the energy conduction constantly reactor core nuclear fission produced out, be called as primary Ioops system.
Primary Ioops auxiliary system is mainly used to the normal operation ensureing reactor assembly and primary Ioops system, and primary Ioops auxiliary system divides by its function, the system of guaranteed normal operation and waste processing system.Wherein, by coolant pump drive freezing mixture, circulating cooling is carried out to primary Ioops, it is the important component part of primary Ioops auxiliary system, the pump housing of primary Ioops coolant pump connects mainly through a coupling with drive motor, coupling there is multiple attachment bolt, vibrating higher problem to reduce in coolant pump running, needing to adopt dynamic balance method to correct it.
In prior art, mainly by increasing balancing mass block on the coupling bolt of motor and pump, offsetting the amount of unbalance of axle system, reaching the object reducing vibration, but this method is all after coolant pump and drive motor having been assembled, then carry out whole dynamic balance correction.After the drive motor more renewed, the dynamic equilibrium state of whole system will change, in order to the problem that the vibration solving new system is higher, just again must carry out dynamic balance running to new system, this method not only can at substantial manpower and materials, increase personnel radiation risk, and be in suspended state due to unit whole in the process of carrying out dynamic balance calibration test, dynamic balance calibration duration of test runs is longer, have a strong impact on the generated energy of unit, be unfavorable for the raising of economic benefit, the demand of technical development cannot be met.
Summary of the invention
The object of the invention is to the adjusting method that a kind of one loop of nuclear power station coolant pump is provided for the deficiencies in the prior art, the dynamic balancing fine setting after motor is changed for one loop of nuclear power station coolant pump group, calculating can be carried out at the vibration vector of non-critical path to coolant pump and new motor to determine, thus the dynamic balancing of the pump-electric system after replacing new motor is finely tuned, avoid again carrying out dynamic balance running to the new system after assembling, greatly shorten dynamic balancing adjustment cycle, save the overhaul duration, effective raising dynamic balancing regulated efficiency and economic benefit, reduce personal radiation dose.
The present invention is achieved through the following technical solutions this object:
An adjusting method for one loop of nuclear power station coolant pump, comprises the following steps:
1) defining the global vibration vector that coolant pump and old motor join under pump state is
the vibration vector of old motor self is
the vibration vector of coolant pump self is
the vibration vector of new motor self is
2) vibration vector is calculated
a selected reference point on coupling, using this reference point as compute vectors
zero point, utilize vibration measurement ANALYZER measure coolant pump and old motor join pump state under global vibration vector
3) vibration vector is calculated
no-load test is carried out to old motor, the keyway of selected old motor as reference point, using this reference point as compute vectors
zero point, utilize vibration measurement ANALYZER to measure the vibration vector of old motor self
4) vibration vector is calculated
by the vibration vector recorded
with vibration vector
conversion, to same zero point, utilizes vector plus-minus method to try to achieve the vibration vector of coolant pump self
5) vibration vector is calculated
no-load test is carried out to new motor, the keyway of selected new motor as reference point, using this reference point as compute vectors
zero point, utilize vibration measurement ANALYZER to measure the vibration vector of new motor self
6) determine the order of connection of new motor and coolant pump: the setting angle adjusting new motor, make the vibration vector of new motor as far as possible
with the vibration vector of coolant pump
direction contrary, coolant pump and new motor are connected and fixed.
Wherein, described step 2) in, on coupling, selected one has the bolt of obviously mark as reference point.
Wherein, described step 4) in, first, under coolant pump and old motor coupled condition, measure the angle between reference point selected on coupling and old motor keyway, secondly, by the vector recorded
deduct this angle of measurement, try to achieve the vector after conversion to same zero point
finally, vector plus-minus method is utilized to try to achieve the vibration vector of coolant pump self
Wherein, the conversion at same zero point calculates according to vector plus-minus method.
Wherein, described step 6) in, new motor is connected with bolt by coupling with coolant pump, and the setting angle of adjustment new motor, makes the vibration vector of new motor as far as possible
with the vibration vector of coolant pump
between angle be 180 °.
Wherein, described step 2) in, described vibration measurement ANALYZER Negotiation speed sensor, vortex sensor, photoelectric sensor and signaling line are connected with coolant pump and old motor.
Wherein, the quantity of described velocity transducer is four, and one group is placed in the same plane of old motor drive terminal and anti-drive end respectively between two, mutual placement in 90 °, and is connected with vibration measurement ANALYZER respectively by signaling line.
Further, the step of test sensors usability is also comprised after having connected, concrete: slowly to shake dynamic sensor, observe the vibration values measured and whether change, if velocity transducer and connecting line all connect intact to have numerical value change to illustrate, can use.
Wherein, maintain a certain distance when described vortex sensor is installed and between tested shaft, be connected with vibration measurement ANALYZER by signaling line, adjust to measurement clearance voltage status, according to the distance between the gap voltage adjustment vortex sensor that vibration measurement ANALYZER shows and tested shaft, make gap voltage be stabilized in about-10V, utilize bolt to fix vortex sensor.
Wherein, Reflective stripe is set in selected datum, utilizes signaling line to be connected with vibration measurement ANALYZER by photoelectric sensor, adjust to tachometric survey state, vibration measurement ANALYZER can show tach signal and export.
Further, also comprise the step of checking photoelectric sensor usability, concrete: utilize signaling line that tachometer is connected together with vibration measurement ANALYZER, open tachometer, then vibration measurement ANALYZER is adjusted to tachometric survey state, the rotating speed of display device, then utilize a Reflective stripe to rock before the infrared light that tachometer sends, make it produce tach signal and export, if vibration measurement ANALYZER shows rotating speed, then illustrate that photoelectric sensor connects intact, can use.
Wherein, described step 3) in Reflective stripe be arranged at the keyway place of old motor, described step 5) in Reflective stripe be arranged at the keyway place of new motor.
Relative to prior art, beneficial effect of the present invention is: the adjusting method of a kind of one loop of nuclear power station coolant pump of the present invention, the dynamic balancing fine setting after motor is changed for one loop of nuclear power station coolant pump group, calculating can be carried out at the vibration vector of non-critical path to coolant pump and new motor to determine, thus the dynamic balancing of the pump-electric system after replacing new motor is finely tuned, avoid re-starting dynamic balance running, greatly shorten dynamic balancing adjustment cycle, effectively increase economic efficiency, reduce personal radiation dose, concrete, more than 12 hours overhaul duration can be reduced in actual applications, reduce each professional human input 15 people of dynamic balance running, minimizing personnel collective external radiation dosage about 300 μ SV people.
Accompanying drawing explanation
Fig. 1 is that coolant pump vibration vector solves schematic diagram.
Fig. 2 is that coolant pump vibration vector and new motor vibration vector adjust schematic diagram.
Fig. 3 is the dynamic balancing method for trimming schematic diagram of embodiment 3.
Embodiment
Describe the present invention below in conjunction with drawings and the specific embodiments.
Embodiment 1.
The adjusting method of a kind of one loop of nuclear power station coolant pump of the present embodiment, comprises the following steps:
1) defining the global vibration vector that coolant pump and old motor join under pump state is
the vibration vector of old motor self is
the vibration vector of coolant pump self is
the vibration vector of new motor self is
vector plus-minus method is then utilized to try to achieve the vibration vector of coolant pump self
2) vibration vector is calculated
as shown in Figure 1, a selected reference point on coupling, using this reference point as compute vectors
zero point, utilize vibration measurement ANALYZER measure coolant pump and old motor join pump state under global vibration vector
as preferably, coupling is selected one and there is the bolt of obviously mark as reference point, be convenient to carry out measuring and vector conversion.
3) vibration vector is calculated
no-load test is carried out to old motor, the keyway M of selected old motor as reference point, using this reference point as compute vectors
zero point, utilize vibration measurement ANALYZER to measure the vibration vector of old motor self
4) vibration vector is calculated
by the vibration vector recorded
with vibration vector
conversion, to same zero point, utilizes vector plus-minus method to try to achieve the vibration vector of coolant pump self
first, under coolant pump and old motor coupled condition, measure the angle α between reference point selected on coupling and old motor keyway M, secondly, by the vector recorded
deduct this angle of measurement, try to achieve the vector after conversion to same zero point
the conversion at same zero point calculates according to vector plus-minus method, finally, utilizes vector plus-minus method to try to achieve the vibration vector of coolant pump self
5) vibration vector is calculated
no-load test is carried out to new motor, the keyway of selected new motor as reference point, using this reference point as compute vectors
zero point, utilize vibration measurement ANALYZER to measure the vibration vector of new motor self
6) determine the order of connection of new motor and coolant pump: as shown in Figure 2, the setting angle of adjustment new motor, new motor is connected with bolt by coupling with coolant pump, and the setting angle of adjustment new motor, makes the vibration vector of new motor as far as possible
with the vibration vector of coolant pump
direction contrary, namely make the vibration vector of new motor as far as possible
with the vibration vector of coolant pump
between angle be 180 °, after adjusting, coolant pump and new motor are connected and fixed.
The adjusting method of a kind of one loop of nuclear power station coolant pump of the present invention, the dynamic balancing fine setting after motor is changed for one loop of nuclear power station coolant pump group, calculating can be carried out at the vibration vector of non-critical path to coolant pump and new motor to determine, thus the dynamic balancing of the pump-electric system after replacing new motor is finely tuned, avoid re-starting dynamic balance running, greatly shorten dynamic balancing adjustment cycle, effectively increase economic efficiency, reduce personal radiation dose, concrete, more than 12 hours overhaul duration can be reduced in actual applications, reduce each professional human input 15 people of dynamic balance running, minimizing personnel collective external radiation dosage about 300 μ SV people.
Embodiment 2.
The present embodiment provides the Placement of vibration measurement ANALYZER and coolant pump and old motor: described step 2) in, described vibration measurement ANALYZER Negotiation speed sensor, vortex sensor, photoelectric sensor and signaling line are connected with coolant pump and old motor.
Wherein, the quantity of described velocity transducer is four, one group is placed in the same plane of old motor drive terminal and anti-drive end respectively between two, mutual placement in 90 °, and be connected with vibration measurement ANALYZER respectively by signaling line, after having connected, a workman is arranged to take down sensor at the scene, slowly rock, whether great changes have taken place (during hand rolling, changing value can reach hundreds of um) to observe the vibration values measured, if velocity transducer and connecting line all connect intact to have numerical value change to illustrate, can use.
Wherein, maintain a certain distance when described vortex sensor is installed and between tested shaft, the distance of 0.5cm is kept during preferred installation between vortex sensor and tested shaft in the present embodiment, be connected with vibration measurement ANALYZER by signaling line, adjust to measurement clearance voltage status, according to the distance between the gap voltage adjustment vortex sensor that vibration measurement ANALYZER shows and tested shaft, preferably make gap voltage be stabilized in about-10V, utilize bolt to fix vortex sensor.
Gap voltage is preferably made to be stabilized in the explanation of about-10V: because the present embodiment uses vortex sensor, wish most that the relation between its output voltage and input mechanical quantity (amplitude) is linear, and the vortex sensor only linear characteristic of ability in certain output voltage range, in order to ensure that vibration values is in this range of linearity, the initial position that the present embodiment makes displacement transducer install as far as possible corresponds to the intermediate value of this scope, this value is exactly-10V, so want adjusting play voltage to-10V.
Wherein, Reflective stripe is set in selected datum, utilizes signaling line to be connected with vibration measurement ANALYZER by photoelectric sensor, adjust to tachometric survey state, vibration measurement ANALYZER can show tach signal and export.
For photoelectric sensor (also known as key phase), will by rocking Reflective stripe, then its usability of method validation whether having rotating speed to export is checked, concrete, utilize signaling line that tachometer is connected together with vibration analyzer, open tachometer, then vibration analyzer is adjusted to tachometric survey state, the rotating speed of meeting display device at this moment.Then utilize a Reflective stripe to rock before the infrared light that tachometer sends, make it produce tach signal and export.At this moment, if vibration analyzer shows rotating speed, that just illustrates that photoelectric sensor is available.
It is to be noted that we rock Reflective stripe when making it to produce tach signal in the process of availability verification, the distance between the Reflective stripe of rocking and tachometer be made to be not less than distance on axle between Reflective stripe and tachometer.This is because it is have certain work distance that tachometer produces tach signal, exceedes this distance, even if infrared light impinges upon in Reflective stripe, also do not produced tach signal.The position that Reflective stripe is pasted, be the physical zero point of vibration angle, we can choose the bolt position of any label on coupling as zero point.
After the complete all the sensors of Installation and Debugging, start primary Ioops coolant pump, measures and vibration values after recording stable operation, namely obtain the global vibration vector under connection pump state
Wherein, described step 3) measure the vibration vector of new motor
time, described Reflective stripe is arranged at the keyway place of old motor, described step 5) in Reflective stripe be arranged at the keyway place of new motor.
Embodiment 3.
As shown in Figure 3, the present embodiment provides in one loop of nuclear power station overhaul the dynamic balancing method for trimming after changing motor, and in figure, outermost circle represents the top of coupling, and in figure, labelled great circle represents the connecting bolt on coupling, carries out according to following steps:
1) selected bolt B 1 is the global vibration vector under motor front connection pump state is changed in measurement
zero point, record the global vibration vector under connection pump state
for 100um ∠ 90 °;
2) with the keyway M on old motor for zero point, measure the vibration vector of old motor self
for 30um ∠ 150 °;
3) with the keyway on new motor for zero point, measure the vibration vector of new motor self
for 25um ∠ 60 °;
4) carry out plus-minus under old motor oscillating vector and the global vibration vector under connection pump state being converted same zero datum to calculate, by old motor with keyway M for the vibration vector that zero point measures is converted with B1 bolt as the vibration vector under zero datum, angle α according to recording in Fig. 3 between bolt B 1 and old motor keyway M is 15 °, then translation method is utilize the vibration angle of the old motor oscillating vector recorded to deduct 15 °, and after conversion, old motor is 30 ∠ 135 ° with the vibration vector that bolt B 1 is zero point;
5) data obtained have been measured in utilization, calculate the vibration vector of coolant pump itself, that is: 100 ∠, 90 ° of-30 ∠ 135 °=89 ∠ 73 °;
6) order of connection of new motor and coolant pump is determined: as shown in Figure 3, according to the data that the vibration vector of the coolant pump calculated itself is 89 ∠ 73 °, the vibration height point position of position between the 8th, No. 9 bolt of coolant pump self can be determined, according to Vector operation principle, when the angle of two vibration vectors is contrary, superposition after vibration amplitude can be minimum, only need the vibration angle of new motor to be adjusted to the 8th, No. 9 bolt opposite, namely, between the 3rd, No. 4 bolt, amplitude peak the level of vibration after joining pump can be reduced; As mentioned before, with the keyway of new motor for the vibration vector of new motor recorded zero point is for 25um ∠ 60 °, can infer when the vibration angle of new motor is adjusted between the 3rd, No. 4 bolt thus, the keyway of new motor is in No. 5 position between bolt and B2 bolt, according to the order of connection of the new motor determined and coolant pump, complete being connected and fixed of new motor and coolant pump.
In the process of practical application, apply coolant pump adjusting method of the present invention and at least can reduce more than 12 hours overhaul duration, reduce each professional human input 15 people of dynamic balance running, minimizing personnel collective external radiation dosage about 300 μ SV people, be conducive to greatly shortening dynamic balancing adjustment cycle, significantly improve economic benefit.
The above embodiment only have expressed some embodiments of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (12)
1. an adjusting method for one loop of nuclear power station coolant pump, is characterized in that, comprises the following steps:
1) defining the global vibration vector that coolant pump and old motor join under pump state is
the vibration vector of old motor self is
the vibration vector of coolant pump self is
the vibration vector of new motor self is
2) vibration vector is calculated
a selected reference point on coupling, using this reference point as compute vectors
zero point, utilize vibration measurement ANALYZER measure coolant pump and old motor join pump state under global vibration vector
3) vibration vector is calculated
no-load test is carried out to old motor, the keyway of selected old motor as reference point, using this reference point as compute vectors
zero point, utilize vibration measurement ANALYZER to measure the vibration vector of old motor self
4) vibration vector is calculated
by the vibration vector recorded
with vibration vector
conversion, to same zero point, utilizes vector plus-minus method to try to achieve the vibration vector of coolant pump self
5) vibration vector is calculated
no-load test is carried out to new motor, the keyway of selected new motor as reference point, using this reference point as compute vectors
zero point, utilize vibration measurement ANALYZER to measure the vibration vector of new motor self
6) determine the order of connection of new motor and coolant pump: the setting angle adjusting new motor, make the vibration vector of new motor as far as possible
with the vibration vector of coolant pump
direction contrary, coolant pump and new motor are connected and fixed.
2. the adjusting method of one loop of nuclear power station coolant pump according to claim 1, is characterized in that, described step 2) in, on coupling, selected one has the bolt of obviously mark as reference point.
3. the adjusting method of one loop of nuclear power station coolant pump according to claim 1, is characterized in that, described step 4) in, first, under coolant pump and old motor coupled condition, measure the angle between reference point selected on coupling and old motor keyway, secondly, by the vector recorded
deduct this angle of measurement, try to achieve the vector after conversion to same zero point
finally, vector plus-minus method is utilized to try to achieve the vibration vector of coolant pump self
4. the adjusting method of one loop of nuclear power station coolant pump according to claim 3, is characterized in that, the conversion at same zero point calculates according to vector plus-minus method.
5. the adjusting method of one loop of nuclear power station coolant pump according to claim 1, it is characterized in that, described step 6) in, new motor is connected with bolt by coupling with coolant pump, the setting angle of adjustment new motor, makes the vibration vector of new motor as far as possible
with the vibration vector of coolant pump
between angle be 180 °.
6. the adjusting method of one loop of nuclear power station coolant pump according to claim 1, it is characterized in that, described step 2) in, described vibration measurement ANALYZER Negotiation speed sensor, vortex sensor, photoelectric sensor and signaling line are connected with coolant pump and old motor.
7. the adjusting method of one loop of nuclear power station coolant pump according to claim 6, it is characterized in that, the quantity of described velocity transducer is four, one group is placed in the same plane of old motor drive terminal and anti-drive end respectively between two, mutual placement in 90 °, and be connected with vibration measurement ANALYZER respectively by signaling line.
8. the adjusting method of one loop of nuclear power station coolant pump according to claim 7, it is characterized in that, the step of test sensors usability is also comprised after having connected, concrete: slowly to shake dynamic sensor, observe the vibration values measured whether to change, if velocity transducer and connecting line all connect intact to have numerical value change to illustrate, can use.
9. the adjusting method of one loop of nuclear power station coolant pump according to claim 6, it is characterized in that, maintain a certain distance when described vortex sensor is installed and between tested shaft, be connected with vibration measurement ANALYZER by signaling line, adjust to measurement clearance voltage status, according to the distance between the gap voltage adjustment vortex sensor that vibration measurement ANALYZER shows and tested shaft, make gap voltage be stabilized in about-10V, utilize bolt to fix vortex sensor.
10. the adjusting method of one loop of nuclear power station coolant pump according to claim 6, it is characterized in that, in selected datum, Reflective stripe is set, signaling line is utilized to be connected with vibration measurement ANALYZER by photoelectric sensor, adjust to tachometric survey state, vibration measurement ANALYZER can show tach signal and export.
The adjusting method of 11. one loop of nuclear power station coolant pumps according to claim 10, it is characterized in that, also comprise the step of checking photoelectric sensor usability, concrete: utilize signaling line that tachometer is connected together with vibration measurement ANALYZER, open tachometer, then vibration measurement ANALYZER is adjusted to tachometric survey state, the rotating speed of display device, then a Reflective stripe is utilized to rock before the infrared light that tachometer sends, make it produce tach signal and export, if vibration measurement ANALYZER shows rotating speed, then illustrate that photoelectric sensor connects intact, can use.
The adjusting method of 12. one loop of nuclear power station coolant pumps according to claim 10, is characterized in that, described step 3) in Reflective stripe be arranged at the keyway place of old motor, described step 5) in Reflective stripe be arranged at the keyway place of new motor.
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