CN103940540B - Protected type motor vertical wet rotor hydrodynamic axial-force testing device and method - Google Patents
Protected type motor vertical wet rotor hydrodynamic axial-force testing device and method Download PDFInfo
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- CN103940540B CN103940540B CN201410148220.9A CN201410148220A CN103940540B CN 103940540 B CN103940540 B CN 103940540B CN 201410148220 A CN201410148220 A CN 201410148220A CN 103940540 B CN103940540 B CN 103940540B
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Abstract
The invention provides a kind of protected type motor vertical wet rotor hydrodynamic axial-force testing device and method.Proving installation comprises shell, rotor, upper flywheel, lower flywheel, bracing frame, packoff, pick-up unit and variable-frequency motor, upper flywheel is connected with rotor with lower flywheel, rotor is connected with shell by bearing, pick-up unit comprises thrust carrier, thrust disc dynamometry axle and some load cell, be connected with thrust disc dynamometry axle by the first shaft coupling after rotor passes from shell, thrust disc dynamometry axle is connected with thrust carrier by bearing, thrust carrier is by some load cell, ring flange is connected with bracing frame, variable-frequency motor is connected with thrust disc dynamometry axle by the second shaft coupling.Compared with prior art, proving installation of the present invention can realize shielding motor rotor assembly because of the quick test of fluid dynamics axial force that Bernoulli effect produces under variable speed condition, for the fluid-dynamic design of shielding motor rotor assembly and optimization provide reference data.
Description
Technical field
The present invention relates to fluid machinery technical field, particularly a kind of protected type motor vertical wet rotor hydrodynamic axial-force testing device and method.
Background technology
Core main pump, as the power source of nuclear reactor coolant cools medium circulation, is described as the heart of nuclear reactor.Current in-service nuclear reactor main pump, the shaft seal pump that adopts as Core cooling agent main pump more.The appearance of all previous nuclear accident is had higher requirement to Nuclear Safety, in order to improve security of system from principle, once the shaft seal pump be widely used is replaced by leak free canned motor pump because of these technological difficulties of its high pressure dynamic sealing, appears on Generation Ⅲ.High-pressure fluid, by the conversion of pressure boundary, is introduced motor internal by Coolant Pump, adopts static seal to replace motive seal, instead of the incomplete pressure boundary of shaft seal pump, thus improve reactor core security with complete pressure boundary.But Coolant Pump is owing to being subject to larger fluid resistance, and main pump running down performance proposes requirements at the higher level under safety Design is to power-off operating mode, and therefore this Coolant Pump structurally needs to increase fly-wheel control, to meet the requirement of system running down inertia.
But the variation of shield electric machine is sealed into static seal and the No leakage technical advantage brought just, but bring new challenge to the design of large-scale shield electric machine.Because the rotor assembly with free wheels structure rotates in interstitial fluid high speed, the existence of fluid Bernoulli effect makes the rotor assembly of symmetric design in structure in flow dynamics, occur asymmetry.The asymmetry of pressure distribution makes rotor assembly be subject to axial force after carrying out integration to rotor assembly perpendicular to the cross section of axis direction.Because hydrodynamic characteristics is relevant to fluidised form, shielding motor rotor rotating speed changes the fluidised form of Clearance Flow, and therefore this axial force is an acting force with the change of shield electric machine running speed, thus causes the test of its axial force to become difficulty.Because fluid force is relevant to fluidised form, therefore the size of this axial force changes with motor speed change, and enlarges markedly in the process of rotating speed rising, particularly remarkable for large-sized shielding motor rotor structure.
This shield electric machine is in the process used, adopt vertical mounting structure, therefore be with the rotor assembly of free wheels structure to be that vertical rotating wets rotor assembly, vertical rotating rotor is that the test of hydrodynamics axial force adds difficulty, thus the design be difficult to for fluid lubricated bearing provides technical parameter.
Summary of the invention
The object of the invention is to provide a kind of protected type motor vertical wet rotor hydrodynamic axial-force testing device, be difficult to test with the fluid dynamics axial force solving existing vertical rotating rotor, thus be difficult to for the design of fluid lubricated bearing provides the technical matters of technical parameter.
Another object of the present invention is to provide the method for testing of above-mentioned protected type motor vertical wet rotor hydrodynamic axial-force testing device, be difficult to test with the fluid dynamics axial force solving existing vertical rotating rotor, thus be difficult to for the design of fluid lubricated bearing provides the technical matters of technical parameter.
The object of the invention is achieved through the following technical solutions:
A kind of protected type motor vertical wet rotor hydrodynamic axial-force testing device, comprise shell, rotor, upper flywheel, lower flywheel, bracing frame, pick-up unit and drive unit, described upper flywheel and described lower flywheel are separately positioned on the two ends of described rotor, the two ends of described rotor are connected with the inwall of described shell with lower bush(ing) bearing respectively by upper bush(ing) bearing, described upper flywheel and described lower flywheel are arranged in described shell, described rotor, described upper flywheel and have gap between described lower flywheel and described outer casing inner wall, the lower end of described shell is connected with support frame as described above, described pick-up unit comprises thrust carrier, thrust disc dynamometry axle and some load cell, be connected with described thrust disc dynamometry axle by the first shaft coupling after the shaft shoulder of described rotor lower end passes from described shell, described thrust disc dynamometry axle is connected with described thrust carrier by thrust bearing, described thrust carrier is connected with some load cell, load cell is connected with support frame as described above by ring flange, described thrust disc dynamometry axle is connected with described ring flange by annular bearing with rolling contact, described annular bearing with rolling contact is positioned at the below of described thrust bearing, described drive unit comprises variable-frequency motor, described variable-frequency motor is connected with described thrust disc dynamometry axle by the second shaft coupling, described variable-frequency motor is connected with support frame as described above by flange.
In the preferred embodiment of the invention, the junction of described rotor lower end and described shell is provided with mechanical sealing device.
In the preferred embodiment of the invention, described packoff comprises O-ring seal.
In the preferred embodiment of the invention, described load cell comprises force snesor, and described force snesor is 4, and 4 force snesor are uniformly distributed in a circumferential direction, can increase the stability of structure.
In the preferred embodiment of the invention, described upper flywheel is identical with the structure of described lower flywheel, and described upper flywheel is connected with described rotor respectively by key and clamp nut with described lower flywheel.
In the preferred embodiment of the invention, described first shaft coupling is connected with described thrust disc dynamometry axle by set nut.
In the preferred embodiment of the invention, also comprise Data Collection And Analysis System, described Data Collection And Analysis System is connected with described load cell, and described Data Collection And Analysis System is used for carrying out Collection and analysis to the measured value of load cell.
The method of testing of above-mentioned protected type motor vertical wet rotor hydrodynamic axial-force testing device, comprises the following steps:
A. each parts are installed according to the annexation in claim 1, during stationary rotor, rotor is connected with described thrust disc dynamometry axle by described first shaft coupling, the gravity suffered by rotor assembly that described rotor and described upper flywheel and described lower flywheel form is delivered to described thrust bearing by described thrust disc dynamometry axle, the acting force that described thrust bearing bears is delivered to some load cell by thrust carrier, thus measures the axial force G suffered by static position lower rotor part assembly
1, G
1for the measured value sum of all load cell;
B. in described shell, liquid is filled, start variable-frequency motor, variable-frequency motor drives described thrust disc dynamometry axle to rotate by the second shaft coupling, described thrust disc dynamometry axle is rotated in interstitial fluid by the first shaft coupling rotor driven, in rotary course, enclosure interstitial fluid medium causes pressure distribution to occur difference due to speed difference, thus makes rotor assembly be subject to axial force, meanwhile, rotor assembly is also subject to gravity forces; Gravity suffered by rotor assembly and axial force are delivered to described thrust bearing by described thrust disc dynamometry axle, the acting force that described thrust bearing bears is delivered to some load cell by thrust carrier, thus measures the axial force G suffered by rotor assembly
2, G
2for the measured value sum of all load cell; Then can obtain the axial flow of fluid kinetics function power G=G suffered by this rotor assembly
2-G
1.
In the preferred embodiment of the invention, the liquid in described step b comprises water.
In the preferred embodiment of the invention, the rotating speed of described variable-frequency motor is 0-1500rpm, makes measurement mechanism can measure the axial force of rotor assembly within the scope of wide range speed.
Compared with prior art, the present invention has following beneficial effect:
1, protected type motor vertical wet rotor hydrodynamic axial-force testing device of the present invention can realize shielding motor rotor assembly because of the quick test of fluid dynamics axial force that Bernoulli effect produces under variable speed condition, for the fluid-dynamic design of shielding motor rotor assembly and optimization provide reference data;
2, protected type motor vertical wet rotor hydrodynamic axial-force testing device of the present invention is also by online collection and the analysis of shield electric machine vertical wet rotor hydrodynamic axial force under Data Collection And Analysis System realization rotation operating mode.
Certainly, implement arbitrary product of the present invention might not need to reach above-described all advantages simultaneously.
Accompanying drawing explanation
Fig. 1 is the structural representation of protected type motor vertical wet rotor hydrodynamic axial-force testing device of the present invention;
Fig. 2 is the part-structure schematic diagram of protected type motor vertical wet rotor hydrodynamic axial-force testing device of the present invention.
Embodiment
Protected type motor vertical wet rotor hydrodynamic axial-force testing device of the present invention can realize shielding motor rotor assembly because of the quick test of fluid dynamics axial force that Bernoulli effect produces under variable speed condition, for the fluid-dynamic design of shielding motor rotor assembly and optimization provide reference data.Protected type motor vertical wet rotor hydrodynamic axial-force testing device of the present invention is also by online collection and the analysis of shield electric machine vertical wet rotor hydrodynamic axial force under Data Collection And Analysis System realization rotation operating mode.
Below in conjunction with the preferred embodiments of the present invention, the present invention will be further described.
Embodiment 1
Refer to Fig. 1,2, protected type motor vertical wet rotor hydrodynamic axial-force testing device of the present invention, comprises shell 1, rotor 4, upper flywheel 2, lower flywheel 6, bracing frame 15, pick-up unit and drive unit.Upper flywheel 2 and lower flywheel 6 are fixed on the two ends of rotor 4 to form rotor assembly respectively by clamp nut, for simulating the rotor assembly with free wheels structure of Coolant Pump.The two ends of rotor 4 are connected with the inwall of shell 1 with lower bush(ing) bearing 5 respectively by upper bush(ing) bearing 3, and upper flywheel 2 and lower flywheel 6 are arranged in shell 1, rotor 4, upper flywheel 2 and have gap between lower flywheel 6 and the inwall of shell 1.The lower end of shell 1 is fixedly connected with bracing frame 15 by clamp nut.Pick-up unit comprises thrust carrier 8, thrust disc dynamometry axle 9 and some load cell 13, be connected with thrust disc dynamometry axle 9 by the first shaft coupling 7 after the shaft shoulder of rotor 4 lower end passes from shell 1, thrust disc dynamometry axle 9 is connected with thrust carrier 8 by thrust bearing 14, thrust carrier 8 is connected with some load cell 13, load cell 13 is connected with bracing frame 15 by ring flange 16, ring flange 16 is fixedly connected with bracing frame 15, thrust disc dynamometry axle 9 is connected with ring flange 16 by annular bearing with rolling contact 12, annular bearing with rolling contact 12 is positioned at the below of thrust bearing 14.Drive unit comprises variable-frequency motor 10, and variable-frequency motor 10 is connected with thrust disc dynamometry axle 9 by the second shaft coupling 11, and variable-frequency motor 10 output torque is transmitted by thrust disc dynamometry axle 9, and variable-frequency motor 10 is connected with bracing frame 15 by flange.
In the present embodiment, the junction of rotor 4 lower end and shell 1 is provided with packoff 17, and packoff can be O-ring seal, also can be other hermetically-sealed construction.
In the present embodiment, load cell 13 comprises force snesor, and force snesor is 4, and 4 force snesor are uniformly distributed in a circumferential direction, can increase the stability of structure.
In the present embodiment, upper flywheel is identical with the structure of lower flywheel, and upper flywheel 2 is connected with rotor 4 respectively by key and clamp nut with lower flywheel 6.
In the present embodiment, the first shaft coupling 7 is connected with thrust disc dynamometry axle 9 by set nut.
In the present embodiment, also comprise Data Collection And Analysis System, Data Collection And Analysis System is connected with load cell, and Data Collection And Analysis System is used for carrying out Collection and analysis to the measured value of load cell.
The torque transmission paths of proving installation of the present invention is: variable-frequency motor 10 output torque is delivered to thrust disc dynamometry axle 9 by the key connected mode of the second shaft coupling 11, the moment of torsion that thrust disc dynamometry axle 9 exports is delivered to rotor 4 by the key connected mode of flexible first shaft coupling 7, rotor driven 4 rotates, and completes the driving of rotor 4.
The bang path of the rotor assembly fluid dynamics axial force of proving installation of the present invention is: the fluid dynamics axial force of rotor assembly carrying passes to the first shaft coupling 7 by the shaft shoulder of rotor, first shaft coupling 7 carries out axial force transmission by the internal engagement shaft shoulder, and pass to thrust disc dynamometry axle 9 by set nut, thrust disc dynamometry axle 9 passes to thrust carrier 8 by thrust bearing 14, thrust carrier 8 acts on load cell 13, thus completes transmission and the test of axial force.
Embodiment 2
The present invention also provides the method for testing of the proving installation of embodiment 1, comprises the following steps:
A. the annexation of each parts according to embodiment 1 is installed, during stationary rotor, rotor is connected with thrust disc dynamometry axle by the first shaft coupling, the gravity suffered by rotor assembly that rotor and upper flywheel and lower flywheel form is delivered to thrust bearing by thrust disc dynamometry axle, the acting force that thrust bearing bears is delivered to some load cell by thrust carrier, thus measures the axial force G suffered by static position lower rotor part assembly
1, G
1for the measured value sum of all load cell, thus complete transmission and the test of axial force;
B. water is filled in the enclosure, start variable-frequency motor, variable-frequency motor drives thrust disc dynamometry axle to rotate by the second shaft coupling, thrust disc dynamometry axle is rotated in interstitial fluid by the first shaft coupling rotor driven, in rotary course, enclosure interstitial fluid medium causes pressure distribution to occur difference due to speed difference, thus makes rotor assembly be subject to axial force, meanwhile, rotor assembly is also subject to gravity forces; Gravity suffered by rotor assembly and axial force are delivered to thrust bearing by thrust disc dynamometry axle, and the acting force that thrust bearing bears is delivered to some load cell by thrust carrier, thus measures the axial force G suffered by rotor assembly
2, G
2for the measured value sum of all load cell, thus complete transmission and the test of axial force; Then can obtain the axial flow of fluid kinetics function power G=G suffered by this rotor assembly
2-G
1.Data Collection And Analysis System can carry out Collection and analysis to the measured value of load cell, for the fluid-dynamic design of shielding motor rotor assembly and optimization provide reference data.
In the present embodiment, the water in step b also can be other liquid.
In the present embodiment, the rotating speed of variable-frequency motor is 0-1500rpm, makes measurement mechanism can measure the axial force of rotor assembly within the scope of wide range speed.
Be only several specific embodiments of the application above, but the application is not limited thereto, the changes that any person skilled in the art can think of, all should drops in the protection domain of the application.
Claims (10)
1. a protected type motor vertical wet rotor hydrodynamic axial-force testing device, comprise shell, rotor, upper flywheel, lower flywheel, bracing frame, pick-up unit and drive unit, described upper flywheel and described lower flywheel are separately positioned on the two ends of described rotor, the two ends of described rotor are connected with the inwall of described shell with lower bush(ing) bearing respectively by upper bush(ing) bearing, described upper flywheel and described lower flywheel are arranged in described shell, it is characterized in that, described rotor, described upper flywheel and have gap between described lower flywheel and described outer casing inner wall, the lower end of described shell is connected with support frame as described above, described pick-up unit comprises thrust carrier, thrust disc dynamometry axle and some load cell, be connected with described thrust disc dynamometry axle by the first shaft coupling after the shaft shoulder of described rotor lower end passes from described shell, described thrust disc dynamometry axle is connected with described thrust carrier by thrust bearing, described thrust carrier is connected with some load cell, load cell is connected with support frame as described above by ring flange, described thrust disc dynamometry axle is connected with described ring flange by annular bearing with rolling contact, described annular bearing with rolling contact is positioned at the below of described thrust bearing, described drive unit comprises variable-frequency motor, described variable-frequency motor is connected with described thrust disc dynamometry axle by the second shaft coupling, described variable-frequency motor is connected with support frame as described above by flange.
2. protected type motor vertical wet rotor hydrodynamic axial-force testing device as claimed in claim 1, it is characterized in that, the junction of described rotor lower end and described shell is provided with mechanical sealing device.
3. protected type motor vertical wet rotor hydrodynamic axial-force testing device as claimed in claim 2, it is characterized in that, described packoff comprises O-ring seal.
4. protected type motor vertical wet rotor hydrodynamic axial-force testing device as claimed in claim 1, it is characterized in that, described load cell comprises force snesor, and described force snesor is 4, and 4 force snesor are uniformly distributed in a circumferential direction.
5. protected type motor vertical wet rotor hydrodynamic axial-force testing device as claimed in claim 1, it is characterized in that, described upper flywheel is identical with the structure of described lower flywheel, and described upper flywheel is connected with described rotor respectively by key and clamp nut with described lower flywheel.
6. protected type motor vertical wet rotor hydrodynamic axial-force testing device as claimed in claim 1, it is characterized in that, described first shaft coupling is connected with described thrust disc dynamometry axle by set nut.
7. protected type motor vertical wet rotor hydrodynamic axial-force testing device as claimed in claim 1, it is characterized in that, also comprise Data Collection And Analysis System, described Data Collection And Analysis System is connected with described load cell, and described Data Collection And Analysis System is used for carrying out Collection and analysis to the measured value of load cell.
8., as the method for testing of the protected type motor vertical wet rotor hydrodynamic axial-force testing device in claim 1-7 as described in any one, it is characterized in that, comprise the following steps:
Each parts are installed according to the annexation in claim 1 by step a., during stationary rotor, rotor is connected with described thrust disc dynamometry axle by described first shaft coupling, the gravity suffered by rotor assembly that described rotor and described upper flywheel and described lower flywheel form is delivered to described thrust bearing by described thrust disc dynamometry axle, the acting force that described thrust bearing bears is delivered to some load cell by thrust carrier, thus measures the axial force G suffered by static position lower rotor part assembly
1, G
1for the measured value sum of all load cell;
Step b. fills liquid in described shell, start variable-frequency motor, variable-frequency motor drives described thrust disc dynamometry axle to rotate by the second shaft coupling, described thrust disc dynamometry axle is rotated in interstitial fluid by the first shaft coupling rotor driven, in rotary course, enclosure interstitial fluid medium causes pressure distribution to occur difference due to speed difference, thus makes rotor assembly be subject to axial force, meanwhile, rotor assembly is also subject to gravity forces; Gravity suffered by rotor assembly and axial force are delivered to described thrust bearing by described thrust disc dynamometry axle, the acting force that described thrust bearing bears is delivered to some load cell by thrust carrier, thus measures the axial force G suffered by rotor assembly
2, G
2for the measured value sum of all load cell; Then can obtain the axial flow of fluid kinetics function power G=G suffered by this rotor assembly
2-G
1.
9. the method for testing of protected type motor vertical wet rotor hydrodynamic axial-force testing device as claimed in claim 8, it is characterized in that, the liquid in described step b comprises water.
10. the method for testing of protected type motor vertical wet rotor hydrodynamic axial-force testing device as claimed in claim 8, it is characterized in that, the rotating speed of described variable-frequency motor is 0-1500rpm.
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| CN201410148220.9A CN103940540B (en) | 2014-04-14 | 2014-04-14 | Protected type motor vertical wet rotor hydrodynamic axial-force testing device and method |
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|---|---|---|---|
| CN201410148220.9A CN103940540B (en) | 2014-04-14 | 2014-04-14 | Protected type motor vertical wet rotor hydrodynamic axial-force testing device and method |
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| CN103940540A CN103940540A (en) | 2014-07-23 |
| CN103940540B true CN103940540B (en) | 2016-03-02 |
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