CN105784231A - Testing apparatus and method for radial pressure flow resistance and asymmetric axial force of circulation at reflowing-hole-included plate surface gap - Google Patents
Testing apparatus and method for radial pressure flow resistance and asymmetric axial force of circulation at reflowing-hole-included plate surface gap Download PDFInfo
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- CN105784231A CN105784231A CN201610139666.4A CN201610139666A CN105784231A CN 105784231 A CN105784231 A CN 105784231A CN 201610139666 A CN201610139666 A CN 201610139666A CN 105784231 A CN105784231 A CN 105784231A
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- 238000012360 testing method Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title abstract description 10
- 239000012530 fluid Substances 0.000 claims description 80
- 238000007789 sealing Methods 0.000 claims description 31
- 238000002955 isolation Methods 0.000 claims description 24
- 238000010998 test method Methods 0.000 claims description 16
- 239000007788 liquid Substances 0.000 claims description 15
- 230000000994 depressogenic effect Effects 0.000 claims description 11
- 238000009434 installation Methods 0.000 claims description 9
- 238000005259 measurement Methods 0.000 claims description 9
- 230000003068 static effect Effects 0.000 claims description 4
- 238000010992 reflux Methods 0.000 claims description 3
- 230000017105 transposition Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000005457 optimization Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 7
- 239000002826 coolant Substances 0.000 description 4
- 238000013459 approach Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000013139 quantization Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0009—Force sensors associated with a bearing
- G01L5/0019—Force sensors associated with a bearing by using strain gages, piezoelectric, piezo-resistive or other ohmic-resistance based sensors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M10/00—Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention provides a testing apparatus and method for radial pressure flow resistance and an asymmetric axial force of circulation at a reflowing-hole-included plate surface gap. Compared with the prior art, the provided testing apparatus and method have the following beneficial effects: testing of the radial pressure flow resistance and the asymmetric axial force of the reflowing-hole-included surface gap circulation on the conditions of different rotating speeds, different gap widths, different flows, different reflowing hole positions, and different numbers can be realized; and technical parameters are provided for a reflowing hole structure design and optimization of a high-power shield motor main pump.
Description
Technical field
The present invention relates to the technical field of mechanical test device design, be specifically related to band return port card Gap Annular Flow radial pressure flow resistance and asymmetric 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, many employing shaft seal pumps are as Core cooling agent main pump.Nuclear Safety is had higher requirement by the appearance of all previous nuclear accident, in order to improve security of system on principle, once the shaft seal pump being widely used is replaced by leak free canned motor pump because of these technological difficulties of its high pressure dynamic sealing, occurs on Generation Ⅲ.The Coolant Pump conversion by pressure boundary, introduces motor internal by high-temperature, high pressure fluid, adopting static seal to replace movable sealing, instead of the incomplete pressure boundary of shaft seal pump with complete pressure boundary, thus improve reactor core safety.But Coolant Pump is between the high-temperature cooling water of primary Ioops and upper journal bearing due to upper flywheel, primary Ioops heat is delivered to upper flywheel area through heat shielding so that upper flywheel district temperature is significantly high.And be exactly journal bearing in the lower section of upper flywheel area, in order to cool down journal bearing, inside and outside journal bearing, all offer runner, inner flow passage is mixed with external flow passage through return port outflow by card gap, flywheel lower end.
An additional axial force can be produced, to the load increasing thrust bearing yet with offering of return port.Additionally due to the pumping effect of flywheel end face, cause that the split ratio of interior outer flow passage changes, therefore under special operation condition, the bearing capacity of journal bearing is impacted.
Therefore, need a kind of to return port card Gap Annular Flow apparatus and method of radial pressure flow resistance and the measurement of asymmetric axial force under different rotating speeds, return port position and gap width, carry out the structural design for high-power shield electric machine main pump return port and provide technical parameter with optimizing, provide fractional load parameter for Designing Thrust Bearing.
Summary of the invention
Present invention aim at providing band return port card Gap Annular Flow radial pressure flow resistance and asymmetric shaft to force test method and device, there is very big movable sealing frictional force can not accurately measure additional axial force and resistance coefficient solving prior art, thus being difficult for the structural design of cold loop return port in high-power shield electric machine main pump and load of thrust bearing thereof assessment provides the technical matters of technical parameter.
The object of the invention is accomplished by:
A kind of band return port card Gap Annular Flow radial pressure flow resistance and asymmetric axial-force testing device, including upper end cover, bottom end cover, shell, rotating shaft, described upper end cover, bottom end cover lid are located on the upper and lower end of described shell and form a closing chamber；Described bottom end cover upper end center place is provided with a depressed part, and the lower end of described rotating shaft puts in described depressed part and forms annular gap, and the upper end of described rotating shaft is connected through the middle part of described upper end cover with external driver device；Described rotating shaft rotates relative to described upper end cover and bottom end cover；
Be provided with in described closing chamber be set in described rotating shaft fluid drives disk, fluid isolation cover, seal cavity, multi-axis force transducer；The lower surface of described fluid drives disk is relative with the upper surface of described bottom end cover forms a card gap；The lower end of described sealing cavity is fixing with the upper end of described fluid drives disk to be connected；Described multi-axis force transducer is positioned at described annular seal space body, and described multi-axis force transducer is fixing with sealing cavity and rotating shaft to be connected；Described fluid isolation cover cap is located on described sealing cavity, and is positioned at above described fluid drives disk, and described fluid isolation cover is fixing with described rotating shaft to be connected；In described rotating shaft, the torque on multi-axis force transducer comes solely from described fluid drives disk；
On described bottom end cover, center is provided with the access aperture communicated with described depressed part, and described bottom end cover inner circumferential is evenly equipped with multiple tap hole, and each tap hole is provided with the return port connecting described tap hole and described closing chamber；Liquid enters in described closing chamber from described access aperture, then refluxes out from described return port, tap hole successively；Described access aperture, tap hole are provided with pressure transducer, described access aperture is additionally provided with effusion meter.
Preferably, described fluid isolation cover lower ending opening is provided with bulge-structure, on described fluid drives disk, corresponding position is provided with groove structure, described bulge-structure injects in described groove structure, and between described fluid drives disk and described fluid isolation cover, do not have power to transmit between described bulge-structure and described groove structure.
It is preferred that, described sealing cavity includes the cavity structure of a lower ending opening, and described cavity structure is set in described rotating shaft, and the lower end of described cavity structure is fixedly connected to form complete sealing cavity with described fluid drives disk.
It is preferred that described sealing cavity also includes a upper cover plate, described upper cover plate is fixedly installed on described cavity structure outside top, and described upper cover plate is set in described rotating shaft.
It is preferred that, between described upper cover plate and described cavity structure, between described cavity structure and described fluid drives disk, it is provided with sealing ring.
It is preferred that oil enveloping structure between described upper cover plate and described rotating shaft.
It is preferred that be provided with oil enveloping structure between described upper end cover, bottom end cover and described rotating shaft.
It is preferred that, described tap hole is radially arranged along described bottom end cover, and the outflow end of described tap hole is positioned at the side of described bottom end cover；
Being provided with multiple return port on each described tap hole, described return port is perpendicular to described tap hole, and one end of described return port connects described tap hole, and the other end extends to the upper surface of described bottom end cover.
It is preferred that in multiple described return ports, the outlet opposite position of one of them described return port is provided with pressure transducer, all the other described return ports are provided with the plug screw controlling break-make.
It is preferred that described plug screw and described pressure transducer can carry out installation settings by transposition.
Preferably, the external diameter of described plug screw is provided with for installation into the first screw thread on described bottom end cover, being provided with for installation into the second screw thread on described bottom end cover on the external diameter of described pressure transducer, described first screw thread and described second thread size, shape are identical.
Preferably, the inner surface of described bottom end cover is additionally provided with one for adjusting the adjustment disk of card gap size between described fluid drives disk and described bottom end cover, described adjustment disk is provided with described return port corresponding position the through hole being connected described return port and described closing chamber.
It is preferred that described multi-axis force transducer includes axial force measuration unit and torque measurement unit.
A kind of band return port card Gap Annular Flow radial pressure flow resistance and asymmetric shaft, to force test method, adopt band return port card Gap Annular Flow radial pressure flow resistance as above and asymmetric axial-force testing device, comprise the following steps:
A, each parts are attached with described annexation by claim 1；Time static, described multi-axis force transducer is only limited by responsive to axial force, and the axial force measured by described multi-axis force transducer is the weight F1 of described sealing cavity and fluid drives disk；
B, in described closing chamber, fill liquid；
C, starting described external driver device so that described axis of rotation, described rotating shaft drives described fluid drives disk and fluid isolation cover to rotate together, and described fluid drives disk rotational drives the liquid in described closing chamber to flow out from described tap hole；
After described axis of rotation is stable, record its rotating speed W；Record, the numerical value G of the torque measurement unit of described multi-axis force transducer, the numerical value F2 of the axial force measuration unit of described multi-axis force transducer, the numerical value P1 of described access aperture upward pressure sensor, the numerical value P2 of described tap hole upward pressure sensor simultaneously；The flow of effusion meter is Q, and the sectional area of access aperture is A, and the density of liquid is ρ；
Thus obtaining, the asymmetric axial force produced with return port card gap location is F1-F2, and resistance coefficient is
It is preferred that also include:
D, control driving device and change the rotating speed of described rotating shaft, repeat step c, and obtain under different rotating speeds, the asymmetric axial force produced with return port card gap location and resistance coefficient.
It is preferred that be provided with multiple return port on each described tap hole, the outlet opposite position of one of them described return port is provided with pressure transducer, and all the other described return ports are provided with the plug screw controlling break-make；Method of testing also includes:
E, by what regulate described plug screw and pressure transducer position is set in different return ports, and the break-make of plug screw, repeat step b-c, obtain under different return port positions, under different return port quantity, the asymmetric axial force produced with return port card gap location and resistance coefficient.
It is preferred that the inner surface of described bottom end cover is additionally provided with one for adjusting the adjustment disk of card gap size between described fluid drives disk and described bottom end cover；Method of testing also includes:
F, change the described adjustment disk of different-thickness, repeat step a-c, obtain under different card gap, the asymmetric axial force produced with return port card gap location and resistance coefficient.
It is preferred that described liquid adopts water.
Due to the fact that the above technical scheme of employing, so as to compared with prior art, have the following advantages that and good effect:
Band return port card Gap Annular Flow radial pressure flow resistance provided by the invention and asymmetric axial-force testing device and method, the test of radial pressure flow resistance and axial asymmetric axial force size under different rotating speeds, gap width, flow, return port position and quantity term of the card Gap Annular Flow with return port can be realized, interior cold loop return port structural design for high-power shield electric machine main pump provides reference data with optimizing, and provides parameter for load of thrust bearing thereof assessment.
Accompanying drawing explanation
In conjunction with accompanying drawing, by hereafter state detailed description, the above-mentioned and other feature and advantage of the present invention can be more clearly understood that, wherein:
Fig. 1 is the structural representation with return port card Gap Annular Flow radial pressure flow resistance and asymmetric axial-force testing device provided by the invention；
Fig. 2 is the sectional view of bottom end cover in the present invention.
Detailed description of the invention
Referring to the accompanying drawing illustrating the embodiment of the present invention, the present invention is described in more detail.But, the present invention can realize in many different forms, and should not be construed as by restriction of the embodiment of proposition at this.On the contrary, it is proposed to these embodiments are to reach fully and complete disclosure, and make those skilled in the art understand the scope of the present invention completely.In these accompanying drawings, for clarity sake, it is possible to be exaggerated size and the relative size in layer and region.
The invention provides a kind of band return port card Gap Annular Flow radial pressure flow resistance and asymmetric axial-force testing device and method, when can realize becoming card gap, fluid outlet radial position and quantity, variable-flow, change card rotating speed, the quick test of the asymmetric axial force under effect effect and radial pressure flow resistance coefficient is pumped in card, interior cold loop return port structural design for shield electric machine main pump provides reference data with optimizing, and provides parameter for load of thrust bearing thereof assessment.
Below in conjunction with the preferred embodiments of the present invention, the present invention will be further described.
Embodiment 1
With reference to Fig. 1-2, the invention provides a kind of band return port card Gap Annular Flow radial pressure flow resistance and asymmetric axial-force testing device, including upper end cover 2, shell 6, bottom end cover 10, rotating shaft 28；The housing 6 barrel-like structure in a upper and lower side opening, upper end cover 2, bottom end cover 10 cover respectively and are located on the upper and lower side of shell 6 and form a closing chamber, and one end of rotating shaft 28 is located in closing chamber.Close in chamber be provided be set in rotating shaft 28 fluid drives disk 9, fluid isolation cover 3, seal cavity, multi-axis force transducer 24；The lower surface of fluid drives disk 9 is relative with the inner surface of bottom end cover 10 forms card gap；The upper end of the lower end and fluid drives disk 9 that seal cavity is fixed and is connected；Multi-axis force transducer 24 is positioned at annular seal space body, and multi-axis force transducer 24 is fixed be connected with the upper end sealing cavity and rotating shaft 28；Fluid isolation cover cap 3 lid is located on sealing cavity, and is positioned at above fluid drives disk 9, and fluid isolation cover 3 is fixing with rotating shaft 28 to be connected；On bottom end cover 10, center is provided with access aperture, and bottom end cover 10 inner circumferential is evenly equipped with multiple tap hole 18, and on bottom end cover 10, each tap hole place is provided with connection tap hole and closes the return port 11 of chamber；Liquid enters in closing chamber from access aperture, then refluxes out from return port 11, tap hole 18 successively；Access aperture, tap hole 18 are provided with pressure transducer 12,15,17, access aperture is additionally provided with effusion meter 14.
In the present embodiment, the upper end of rotating shaft 28 is connected through the middle part of upper end cover 2 with external driver device, is additionally provided with sealing device, is specially oil enveloping structure between rotating shaft 28 and upper end cover 2, thus ensure that the sealing sealing cavity；External driver device drives rotating shaft 28 to rotate, and rotating shaft 28 can rotate relative to upper end cover 2 and bottom end cover 10.
In the present embodiment, center, bottom end cover 10 upper surface is provided with a depressed part 30, and the lower end of rotating shaft 28 puts in depressed part 30, forms annular gap between rotating shaft 28 lower end and depressed part 30；The present invention arranges depressed part 30 on bottom end cover 10, and makes the lower end of rotating shaft 28 put in depressed part 30 so that rotating shaft 28 when rotating to annular seal space body in fluid play the effect of pre-rotation such that it is able to the state of fluid in simulation core main pump in all directions.
In the present embodiment, sealing cavity and include the cavity structure 7 of a lower ending opening, cavity structure 7 is set in rotating shaft 28, and the lower end of cavity structure 7 is connected by the modes such as screw are fixing with fluid drives disk 9, thus forming a complete sealing cavity.Multi-axis force transducer 24 is positioned at the annular seal space body of cavity structure 7 and fluid drives disk 9 composition, and multi-axis force transducer 24 fixed cover is located in rotating shaft 28, and the upper end of multi-axis force transducer 24 is fixedly connected on the top of cavity structure 7 by modes such as screws.Concrete, multi-axis force transducer 24 is connected in rotating shaft 28 by flange 23, the lower end of multi-axis force transducer 24 and flange 23 are fixedly and coaxially connected by modes such as screws, flange 23 is also set in rotating shaft 28, it is connected by key 29 between the inner ring of flange 23 with rotating shaft 28, the lower end of flange 23 is additionally provided with a locking nut 22 being set in rotating shaft 28, thus being fixed in rotating shaft 28 by multi-axis force transducer 24；Certainly, the connected mode between multi-axis force transducer 24 and rotating shaft 28 is not limited solely to the above, it is possible to design as the case may be, is not limited as herein.
In the present embodiment, sealing cavity and also include a upper cover plate 26, upper cover plate 26 is also set in rotating shaft 28, and upper cover plate 28 is connected by the modes such as screw are fixing with cavity structure 7；Owing to multi-axis force transducer 24 is connected on the top of cavity structure 7 by the mode of screw, can there is certain gap in screw junction, the present invention by adding a upper cover plate 26 at the top of cavity structure 7, thus preventing fluid from entering into from here in annular seal space body, affect multi-axis force transducer 24 normal operation.In the present embodiment, the junction of upper cover plate 26 and cavity structure 7 is provided with O RunddichtringO 25, oil enveloping structure 27 it is provided with between upper cover plate 26 and rotating shaft 28, O RunddichtringO 21 it is provided with between cavity structure 7 and fluid drives disk 9, oil enveloping structure 8 it is provided with between fluid drives disk 9 and rotating shaft, the present invention is by the setting of above-mentioned each sealing structure, thus ensure that the sealing property sealing cavity.
In the present embodiment, fluid isolation cover 3 lower ending opening, it is fixed in rotating shaft 28 by key 4 and locking nut 5；Fluid isolation cover 3 lid is located on sealing cavity, and is positioned at the top of fluid drives disk 9；The present invention is provided above a fluid isolation cover 3 at fluid drives disk 9, and main purpose is to will act at the fluid sealed on cavity to keep apart, it is prevented that fluid-side convection cell drives disk end face torque measurement to produce impact.
Further, the edge of fluid isolation cover 3 lower ending opening infinite approach fluid drives disk 9 upper surface, but transmission unable between fluid isolation cover 3 and fluid drives disk 9, thus the torque that ensure that in rotating shaft 28 on multi-axis force transducer 24 comes solely from fluid drives disk.Concrete, minimum clearance place between lower end and the fluid drives disk 9 of fluid isolation cover 3 is provided with bulge-structure, groove structure, concrete fluid isolation cover 3 lower ending opening is provided with bulge-structure 31, on fluid drives circle 9, corresponding position is provided with groove structure 32, bulge-structure 31 injects in groove structure 32, and does not have power to transmit between bulge-structure 31 and groove structure 32；Bulge-structure, groove structure be arranged to reduce centrifugal force effect under cause that the fluid between fluid drives disk 9 and fluid isolation cover 3 flows out outward, thus affecting test structure.
In the present embodiment, multi-axis force transducer 24 includes axial force measuration unit and torque measurement unit, torque measurement unit is for calculating the mechanical power of extraneous input gap flow field, and axial force measuration unit is for measuring the asymmetric axial force offering generation due to lower surface return port.In the present embodiment, rotating shaft 28 is a hollow axle, in order to the holding wire of multi-axis force transducer 24 transmits signal outward by hollow axle.
In the present embodiment, in conjunction with Fig. 1 and Fig. 2, it is provided with multiple tap hole 18, multiple tap holes 18 all being radially arranged along bottom end cover 10, and the outflow end of tap hole 18 in multiple bottom end covers 10 and is positioned at the side of bottom end cover 10；Multiple tap hole 18 circumferences are distributed in bottom end cover 10, arranging number and can being set as the case may be of tap hole 18, are provided with 10 tap holes 18 in the present embodiment on bottom end cover 10, it is possible to be provided with 4,8 etc., be not limited as herein.
In the present embodiment, each tap hole 18 is provided with multiple return port 11, arranging position and arranging number and all can be adjusted as the case may be of return port 11, is not limited as herein, is provided with three return ports 11 in the present embodiment on each tap hole 18；Return port 11 is perpendicular to tap hole 18, and one end of return port 11 connects tap hole 18, and the other end extends on the upper surface of bottom end cover 10, from realizing connection tap hole 8 and closing the effect of chamber.
In the present embodiment, in multiple return ports 11, the outlet opposite position of one of them return port 11 is provided with pressure transducer 17,12, and all the other return ports 11 are provided with the plug screw 16,13 controlling break-make.Wherein, the external diameter of plug screw and pressure transducer can carry out installation settings by transposition；Such as, as shown in fig. 1, when the outermost return port 11 of needs is opened time, two other return port 11 is clogged by plug screw, and pressure transducer is positioned at outermost return port exit；In time needing the most inboard return port to open, the pressure transducer of the plug screw at this place Yu outermost return port place can be carried out location swap, thus return port can be realized easily be located at the test of various location.
Further, the external diameter of plug screw is provided with for installation into the first screw thread on bottom end cover, the external diameter of pressure transducer is provided with for installation into the second screw thread on bottom end cover 10, described first screw thread and described second thread size, shape are identical, thus guaranteeing the exchange realizing between plug screw and pressure transducer.
In the present embodiment, the upper end of bottom end cover 10 is additionally provided with one for adjusting the adjustment disk 19 of card gap size between fluid drives disk 9 and bottom end cover 19, adjusts and disk 19 is provided with return port 11 corresponding position the through hole connecting back to discharge orifice 11 and closing chamber.Wherein, it is ready for the adjustment disk 19 of multiple thickness, by changing the adjustment disk 19 of different-thickness in test process, adjusts the width in card gap between fluid drives disk 9 and bottom end cover 19, test.
Embodiment 2
Present invention also offers a kind of band return port card Gap Annular Flow radial pressure flow resistance and asymmetric shaft to force test method, adopt the band return port card Gap Annular Flow radial pressure flow resistance described in embodiment 1 and asymmetric axial-force testing device.
This method of testing specifically includes following steps:
A, by the annexation described in embodiment 1, each parts are attached；Time static, multi-axis force transducer 24 is only limited by responsive to axial force, and the axial force measured by multi-axis force transducer 24 is seal the weight F1 of cavity (cavity structure 7 and upper cover plate 26) and fluid drives disk；
B, fill liquid to closing in chamber；
In the present embodiment, liquid directly adopts water, energy-conserving and environment-protective；
C, startup external driver device so that rotating shaft 28 rotates, rotating shaft 28 carry fluid drives disk and fluid isolation cover 2 to rotate together, and fluid drives disk 9 rotates and drives the liquid closed in chamber to flow out from tap hole 18；
After rotating shaft 28 slow-roll stabilization, record the rotating speed W of rotating shaft 28；Record simultaneously, the numerical value G of the torque measurement unit of multi-axis force transducer 24, the numerical value F2 of the axial force measuration unit of multi-axis force transducer 24, the numerical value P1 of access aperture upward pressure sensor, the numerical value P2 of tap hole 18 upward pressure sensor, the flow of effusion meter is Q, and the sectional area of access aperture is A, and the density of liquid is ρ；
Thus obtaining, the asymmetric axial force produced with return port card gap location is F1-F2, and resistance coefficient is
Further, this method of testing is further comprising the steps of:
D, control driving device and change the rotating speed of described rotating shaft, repeat step c, and obtain under different rotating speeds, the asymmetric axial force produced with return port card gap location and resistance coefficient.
Further, this method of testing is further comprising the steps of:
E, by what regulate plug screw and pressure transducer position is set in different return ports 11, and the break-make of plug screw, repeat step b-c or step b-d, obtain under different return port positions, under different return port quantity, the asymmetric axial force produced with return port card gap location and resistance coefficient.
Further, this method of testing is further comprising the steps of:
F, change the adjustment disk 19 of different-thickness, repeat step a-c or step a-d or step a-e, obtain under different card gap, the asymmetric axial force produced with return port card gap location and resistance coefficient.
In the present embodiment, rotating speed in step c, d, e, f, gap width, return port position and flow carry out no quantization process, to promote usage range.
Those skilled in the art should be understood that the present invention can be implemented without departing from the spirit or scope of itself with other concrete forms many.Although having been described for the case study on implementation of the present invention, it should be understood that the present invention should not be limited to these embodiments, those skilled in the art can change and modifications as made within the spirit and scope of the present invention that appended claims defines.
Claims (18)
1. a band return port card Gap Annular Flow radial pressure flow resistance and asymmetric axial-force testing device, it is characterized in that, including upper end cover, bottom end cover, shell, rotating shaft, described upper end cover, bottom end cover lid are located on the upper and lower end of described shell and form a closing chamber；Described bottom end cover upper end center place is provided with a depressed part, and the lower end of described rotating shaft puts in described depressed part and forms annular gap, and the upper end of described rotating shaft is connected through the middle part of described upper end cover with external driver device；Described rotating shaft rotates relative to described upper end cover and bottom end cover；
Be provided with in described closing chamber be set in described rotating shaft fluid drives disk, fluid isolation cover, seal cavity, multi-axis force transducer；The lower surface of described fluid drives disk is relative with the upper surface of described bottom end cover forms a card gap；The lower end of described sealing cavity is fixing with the upper end of described fluid drives disk to be connected；Described multi-axis force transducer is positioned at described annular seal space body, and described multi-axis force transducer is fixing with sealing cavity and rotating shaft to be connected；Described fluid isolation cover cap is located on described sealing cavity, and is positioned at above described fluid drives disk, and described fluid isolation cover is fixing with described rotating shaft to be connected；In described rotating shaft, the torque on multi-axis force transducer comes solely from described fluid drives disk；
On described bottom end cover, center is provided with the access aperture communicated with described depressed part, and described bottom end cover inner circumferential is evenly equipped with multiple tap hole, and each tap hole is provided with the return port connecting described tap hole and described closing chamber；Liquid enters in described closing chamber from described access aperture, then refluxes out from described return port, tap hole successively；Described access aperture, tap hole are provided with pressure transducer, described access aperture is additionally provided with effusion meter.
2. band return port card Gap Annular Flow radial pressure flow resistance according to claim 1 and asymmetric axial-force testing device, it is characterized in that, described fluid isolation cover lower ending opening is provided with bulge-structure, on described fluid drives disk, corresponding position is provided with groove structure, described bulge-structure injects in described groove structure, and between described fluid drives disk and described fluid isolation cover, do not have power to transmit between described bulge-structure and described groove structure.
3. band return port card Gap Annular Flow radial pressure flow resistance according to claim 1 and asymmetric axial-force testing device, it is characterized in that, described sealing cavity includes the cavity structure of a lower ending opening, described cavity structure is set in described rotating shaft, and the lower end of described cavity structure is fixedly connected to form complete sealing cavity with described fluid drives disk.
4. band return port card Gap Annular Flow radial pressure flow resistance according to claim 3 and asymmetric axial-force testing device, it is characterized in that, described sealing cavity also includes a upper cover plate, described upper cover plate is fixedly installed on described cavity structure outside top, and described upper cover plate is set in described rotating shaft.
5. band return port card Gap Annular Flow radial pressure flow resistance according to claim 3 and asymmetric axial-force testing device, it is characterized in that, between described upper cover plate and described cavity structure, between described cavity structure and described fluid drives disk, be provided with sealing ring.
6. band return port card Gap Annular Flow radial pressure flow resistance according to claim 4 and asymmetric axial-force testing device, it is characterised in that oil enveloping structure between described upper cover plate and described rotating shaft.
7. band return port card Gap Annular Flow radial pressure flow resistance according to claim 1 and asymmetric axial-force testing device, it is characterised in that be provided with oil enveloping structure between described upper end cover, bottom end cover and described rotating shaft.
8. band return port card Gap Annular Flow radial pressure flow resistance according to claim 1 and asymmetric axial-force testing device, it is characterized in that, described tap hole is radially arranged along described bottom end cover, and the outflow end of described tap hole is positioned at the side of described bottom end cover；
Being provided with multiple return port on each described tap hole, described return port is perpendicular to described tap hole, and one end of described return port connects described tap hole, and the other end extends to the upper surface of described bottom end cover.
9. band return port card Gap Annular Flow radial pressure flow resistance according to claim 8 and asymmetric axial-force testing device, it is characterized in that, in multiple described return ports, the outlet opposite position of one of them described return port is provided with pressure transducer, and all the other described return ports are provided with the plug screw controlling break-make.
10. band return port card Gap Annular Flow radial pressure flow resistance according to claim 9 and asymmetric axial-force testing device, it is characterised in that described plug screw and described pressure transducer can carry out installation settings by transposition.
11. band return port card Gap Annular Flow radial pressure flow resistance according to claim 10 and asymmetric axial-force testing device, it is characterized in that, the external diameter of described plug screw is provided with for installation into the first screw thread on described bottom end cover, being provided with for installation into the second screw thread on described bottom end cover on the external diameter of described pressure transducer, described first screw thread and described second thread size, shape are identical.
12. band return port card Gap Annular Flow radial pressure flow resistance according to claim 1 and asymmetric axial-force testing device, it is characterized in that, the inner surface of described bottom end cover is additionally provided with one for adjusting the adjustment disk of card gap size between described fluid drives disk and described bottom end cover, described adjustment disk is provided with described return port corresponding position the through hole being connected described return port and described closing chamber.
13. band return port card Gap Annular Flow radial pressure flow resistance according to claim 1 and asymmetric axial-force testing device, it is characterised in that described multi-axis force transducer includes axial force measuration unit and torque measurement unit.
14. a band return port card Gap Annular Flow radial pressure flow resistance and asymmetric shaft are to force test method, it is characterized in that, adopt in claim 1-14 the band return port card Gap Annular Flow radial pressure flow resistance described in any one and asymmetric axial-force testing device, comprise the following steps:
A, each parts are attached with described annexation by claim 1；Time static, described multi-axis force transducer is only limited by responsive to axial force, and the axial force measured by described multi-axis force transducer is the weight F1 of described sealing cavity and fluid drives disk；
B, in described closing chamber, fill liquid；
C, starting described external driver device so that described axis of rotation, described rotating shaft drives described fluid drives disk and fluid isolation cover to rotate together, and described fluid drives disk rotational drives the liquid in described closing chamber to flow out from described tap hole；
After described axis of rotation is stable, record its rotating speed W；Record simultaneously, the numerical value G of the torque measurement unit of described multi-axis force transducer, the numerical value F2 of the axial force measuration unit of described multi-axis force transducer, the numerical value P1 of described access aperture upward pressure sensor, the numerical value P2 of described tap hole upward pressure sensor, the flow of effusion meter is Q, and the sectional area of access aperture is A, and the density of liquid is ρ；
Thus obtaining, the asymmetric axial force produced with return port card gap location is F1-F2, and resistance coefficient is。
15. band return port card Gap Annular Flow radial pressure flow resistance according to claim 14 and asymmetric shaft are to force test method, it is characterised in that also include:
D, control driving device and change the rotating speed of described rotating shaft, repeat step c, and obtain under different rotating speeds, the asymmetric axial force produced with return port card gap location and resistance coefficient.
16. band return port card Gap Annular Flow radial pressure flow resistance according to claim 14 and asymmetric shaft are to force test method, it is characterized in that, each described tap hole is provided with multiple return port, the outlet opposite position of one of them described return port is provided with pressure transducer, and all the other described return ports are provided with the plug screw controlling break-make；Method of testing also includes:
E, by what regulate described plug screw and pressure transducer position is set in different return ports, and the break-make of plug screw, repeat step b-c, obtain under different return port positions, under different return port quantity, the asymmetric axial force produced with return port card gap location and resistance coefficient.
17. band return port card Gap Annular Flow radial pressure flow resistance according to claim 14 and asymmetric shaft are to force test method, it is characterized in that, the inner surface of described bottom end cover is additionally provided with one for adjusting the adjustment disk of card gap size between described fluid drives disk and described bottom end cover；Method of testing also includes:
F, change the described adjustment disk of different-thickness, repeat step a-c, obtain under different card gap, the asymmetric axial force produced with return port card gap location and resistance coefficient.
18. band return port card Gap Annular Flow radial pressure flow resistance according to claim 14 and asymmetric shaft are to force test method, it is characterised in that described liquid adopts water.
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