CN106762708B - A kind of pump axial force maximum value measurement mechanism and measuring method - Google Patents
A kind of pump axial force maximum value measurement mechanism and measuring method Download PDFInfo
- Publication number
- CN106762708B CN106762708B CN201611015984.6A CN201611015984A CN106762708B CN 106762708 B CN106762708 B CN 106762708B CN 201611015984 A CN201611015984 A CN 201611015984A CN 106762708 B CN106762708 B CN 106762708B
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- layer sleeve
- thrust bearing
- axial force
- pump
- double layer
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0088—Testing machines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2260/00—Function
- F05D2260/83—Testing, e.g. methods, components or tools therefor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention belongs to pump testing field, is related to a kind of pump axial force maximum value measurement mechanism and its measuring method, and device includes two plain thrust bearings, double layer sleeve barrel, filler, spring, individual layer sleeve.One end of the individual layer sleeve is welded on plain thrust bearing end face, other end insertion double layer sleeve barrel；Installation spring, embedment filler in the double layer sleeve barrel, the both ends of spring offset with individual layer sleeve end face, double layer sleeve barrel bottom surface respectively；One end of the double layer sleeve barrel is welded on another plain thrust bearing end face.Measurement is in use, the device is arranged on pump shaft, due to acting on the promotion impeller of the axial force on impeller to the movement of impeller inlet direction, compression spring, filler records maximum extruding depth from the blowdown hole extrusion on double layer sleeve barrel, realizes the measurement of maximum axial force.Small volume of the present invention, it is simple in construction, being capable of accurate measurement maximum axial force.
Description
Technical field
The present invention relates to pump testing fields of measurement, especially a kind of pump axial force maximum value measurement mechanism.
Background technology
Pump is a kind of universal machine, is widely used in the fields such as agricultural, industry.Pump acts on impeller in operation process
On axial force pull impeller axial movement, impeller may be caused to be contacted with stationary parts, cause pump component to damage, it is impossible to normally
Work, the reliability and security of pump operation are severely impacted, therefore it is important design studies to measure and reduce axial force
Process.
The main reason for producing axial force is front and rear cover plate asymmetry, and fluid matasomatism is more than front shroud in back shroud pressure,
Therefore pressure direction on forward and backward cover plate is on the contrary, produce the power for pointing to suction eye.At present mainly by pump chamber after reduction
Fluid pressure reach the purpose for reducing axial force, such as the structure such as balance pipe and seal ring structure, balancing frame, back blade, this
While a little structures reduce axial force, the performance of pump may be changed.
The axial force of pump be with impeller rotation and dynamic change, the flash disruption power of maximum axial force are most strong, reduce
Axial force should be used as design parameter using its maximum.At present, the design method for reducing axial force structure depends on experience,
It is primarily due to be difficult to measuring pump operationally caused maximum axial force, thus can not be quantitatively designed.
In patent CN201410675511.3《A kind of axial force measuring device of immersed pump》In, by installing suspension bracket and drawing additional
Pressure sensor, power transmission shaft etc. is lengthened, realize the axial force measuration for immersed pump.Weak point is to have changed power transmission shaft, and
And the long easy unstability of cantilevered axle.
In patent CN201310067993.X《A kind of axial force measuring device and method for multistage direct connected centrifugal pump》
In, by installing support, power conduction device and measurement apparatus additional on motor, acted in motor afterbody measurement on impeller
Axial force.But the bearing that power is passed on device may be actual so as to cause measured value to be less than axial force transmission to base
Value.
It is therefore an object of the present invention to design a kind of small volume, axle simple in construction, being capable of accurate measurement maximum axial force
To force measuring device.
The content of the invention
The present invention provides a kind of pump axial force maximum value measurement mechanism regarding to the issue above, is not changing substantially in pump
In the case of properties of flow, the measurement of maximum axial force is realized.
The present invention is to realize above-mentioned technical purpose by following technological means：A kind of pump axial force maximum measurement dress
Put, including the first plain thrust bearing, double layer sleeve barrel, filler, spring, individual layer sleeve and the second plain thrust bearing；The list
One end of layer sleeve is fixed on the second plain thrust bearing B end faces；The individual layer sleeve inserts double layer sleeve barrel；The double braid covering
Installation spring, embedment filler, both ends of the spring are in contact with individual layer sleeve end face and double layer sleeve barrel inner face respectively in cylinder；It is described double
Blowdown hole is opened up on the outer layer barrel of layer sleeve, one end of the double layer sleeve barrel is fixed on the first plain thrust bearing B end faces.
In such scheme, the diameter D of the dumping pit1Span be 3mm-10mm；The axle of adjacent blowdown hole (11)
Away from l3Span be 1.5D1-5D1；The blowdown hole site of lowermost end should be less than height when spring is fully compressed.
In such scheme, the filler is to have plasticity and filler not soluble in water at normal temperatures.
In such scheme, the filler is wax.
In such scheme, the individual layer sleeve and the double layer sleeve barrel gap coordinate.
In such scheme, the length l of the individual layer sleeve1More than the length l of the double layer sleeve barrel2。
Present invention also offers a kind of method measured using above-mentioned pump axial force maximum value measurement mechanism, including
Following steps：S1：By the first plain thrust bearing, double layer sleeve barrel, individual layer sleeve and the second plain thrust bearing are arranged on pump shaft
On, impeller nut is connected through a screw thread installed in one end of pump shaft, and impeller nut and the first thrust ball bearing A end faces or
Two thrust ball bearing A end faces offset S2：Continuous service pump shaft, then take out a kind of pump axial force maximum measurement dress
Put, the depth that record filler is extruded；Again install filler, on universal testing machine, compression spring to above-mentioned depth, and
Read axial force maximum.
In such scheme, the first plain thrust bearing A end faces or the second plain thrust bearing A end faces are fixed with impeller and connected
Connect；The double layer sleeve barrel, the first plain thrust bearing, the second plain thrust bearing and the concentricity tolerance of individual layer sleeve and pump shaft
Grade is controlled in the range of IT6-IT9；The the first plain thrust bearing A end faces to be offseted with impeller nut or the second plane thrust
Bearing A end faces are interference fit with pump shaft；The first plain thrust bearing A end faces being fixedly connected with impeller or the second plane thrust
Bearing A end faces coordinate with pump shaft for gap；The first plain thrust bearing B end faces or the second plain thrust bearing B end faces with
Pump shaft gap coordinates.
Beneficial effects of the present invention：A kind of pump axial force maximum value measurement mechanism of the present invention, by axle
Impeller nut, plain thrust bearing, double layer sleeve barrel, filler, spring, individual layer sleeve are set, and will be limited between parameter, part
Matching relationship.When installing the present apparatus, one end offsets with impeller nut and rotated at the same speed with axle, and the other end is together with impeller welding
And rotated at the same speed with axle, inner face and the axle of two plain thrust bearings are that gap coordinates, and do not rotate or slowly run.Pump exists
During operation, the axial force acted on impeller promotes impeller to be moved to impeller inlet direction, and compression spring, filler squeezes from blowdown hole
Go out, the filler of extrusion is discharged to outside pump with fluid.If axial force reaches maximum, amount of spring compression is maximum, and the filler of extrusion is most；
If axial force is less than the maximum, filler is no longer extruded.After running a period of time, a kind of pump axial force is taken out most
Big value measurement mechanism, the depth that record filler is extruded；Again filler is installed, on universal testing machine, compression spring is extremely
Above-mentioned depth, and read axial force maximum.
Brief description of the drawings
Fig. 1 is a kind of scheme of installation of pump axial force maximum value measurement mechanism of the present invention.Fig. 2 is impeller spiral shell
It is female.
Fig. 3 is the structural representation of pump axial force maximum value measurement mechanism of the present invention.
Fig. 4 is double layer sleeve barrel of the present invention.
In figure：A kind of pump axial force maximum value measurement mechanisms of 1-, 2- pump shafts, 3- impellers, 4- impeller nuts, 5-1- first
Plain thrust bearing A end faces, 5-2- the first plain thrust bearing B end faces, 6- double layer sleeve barrels, 7- fillers, 8- springs, 9- individual layer sets
Cylinder, 10-1- the second plain thrust bearing A end faces, 10-2- the second plain thrust bearing B end faces, 11- blowdowns hole.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment the present invention is further illustrated, but protection scope of the present invention is simultaneously
Not limited to this.
As shown in Figure 3 and Figure 4, a kind of pump axial force maximum value measurement mechanism, including the first plain thrust bearing, it is double-deck
Sleeve 6, filler 7, spring 8, individual layer sleeve 9, the second plain thrust bearing；It is flat that one end of the individual layer sleeve 9 is welded on second
On the 10-2 of face thrust bearing B end faces；The individual layer sleeve 9 inserts double layer sleeve barrel 6, the length l of individual layer sleeve 91More than double layer sleeve barrel 6
Length l2, meet l1>l2, two sleeves are that gap coordinates；Installation spring 8, embedment filler 7, spring in the double layer sleeve barrel 6
(8) both ends are in contact with the end face of individual layer sleeve 9 and double layer sleeve barrel 6 respectively；One end of the double layer sleeve barrel 6 is welded on the first plane
On thrust bearing B end face 5-2；As depicted in figs. 1 and 2, impeller nut 4 is connected through a screw thread installed in shaft end, in pump during installation
Offseted during axle 2 with the first plain thrust bearing or the second plain thrust bearing；Second plain thrust bearing A end face 10-1 or
One plain thrust bearing A end face 5-1 weld with impeller 3；Individual layer sleeve 9,6, two plain thrust bearings of double layer sleeve barrel and pump shaft 2
Concentricity tolerance grade control in the range of IT6-IT9；The the second plain thrust bearing A end faces to be offseted with impeller nut 4
10-1 or 5-1, it is interference fit with pump shaft 2；The plain thrust bearing end 10-1 welded with impeller 3 or the first plane thrust
Bearing A end face 5-1, coordinate with pump shaft 2 for gap；First plain thrust bearing B end face 5-2 and the second plain thrust bearing B ends
Face 10-2, coordinate with the gap of pump shaft 2；Blowdown hole 11, the diameter D in blowdown hole 11 are opened up on double layer sleeve barrel 61, span is
3mm-10mm；The wheelbase l in adjacent blowdown hole 113, span 1.5D1-5D1；The position of blowdown hole 11 of lowermost end should be less than bullet
Height when spring 8 is fully compressed, ensure that filler is fully compressed without prejudice to spring；Filler 7 has plasticity, no at normal temperatures
Water is dissolved in, wax etc. can be used；According to written by Guan Xingfan《Modern pump is theoretical with designing》, estimate the axial force F suffered by impeller1；
A kind of pump axial force maximum value measurement mechanism is tested, on universal testing machine, test spring 8 is complete
Compression, pressure F when filler 7 is extruded2, F2F should be met2=2F1-4F1, if not satisfied, then changing the bigger spring 8 of coefficient of elasticity
Tested, untill satisfaction.
The device process for using is as follows：Operationally, the axial force acted on impeller 3 promotes impeller 3 to enter to impeller to pump
The movement of mouth direction, compression spring 8, filler 7 are extruded from blowdown hole 11, and the filler 7 of extrusion is discharged to outside pump with fluid.If axial force reaches
To maximum, the decrement of spring 8 is maximum, and the filler 7 of extrusion is most；If axial force is less than the maximum, filler 7 is no longer squeezed
Go out.After running a period of time, a kind of pump axial force maximum value measurement mechanism, the depth that record filler 7 is extruded are taken out；
Again filler is installed, on universal testing machine, compression spring 8 reads axial force maximum to above-mentioned depth.
Embodiment 1：By taking a low specific speed centrifugal pump IS50-32-160 as an example, the design discharge of pump is 6.3m3/ h, if
Count lift 8m, shaft end diameter d1=20mm.Because shaft length limits, the length l of individual layer sleeve 9 is taken1=15mm, the length of double layer sleeve barrel 6
l2=12mm, meets l1>l2；Design the diameter D in blowdown hole 111=3mm, the wheelbase l in adjacent blowdown hole 113=4.5mm, from bilayer
The bottom of sleeve 6 starts to arrange a blowdown hole, is then spaced 4.5mm and arranges second blowdown again, and circumferencial direction uniform 4 arranges,
Amount to 8 blowdown holes；Filler 7 uses soft wax not soluble in water；Plain thrust bearing selects the (GB/ of thrust ball bearing 51204
T301-1995), one end of double layer sleeve barrel 6 is welded on the first plain thrust bearing B end face 5-2；Impeller nut 4 passes through screw thread
Connection is arranged on shaft end, is offseted with the first plain thrust bearing A end face 5-1；Second plain thrust bearing A end face 10-1 and impeller
3 welding；Concentricity tolerance of individual layer sleeve 9, double layer sleeve barrel 6, the first thrust ball bearing and the second thrust ball bearing and pump shaft 2 etc.
Level is IT7；First plain thrust bearing A end faces 5-1 end faces are to be interference fitted with pump shaft 2, the first plain thrust bearing B end faces
5-2, the second plain thrust bearing A end face 10-1, the second plain thrust bearing B end face 10-2 are that gap coordinates with pump shaft 2.
According to written by Guan Xingfan《Modern pump is theoretical with designing》The double shrouded wheel Axial Force Calculating formula of page 565, estimate leaf
The suffered axial force F of wheel1=120N；Choose spring 8, coefficient of elasticity k=30N/mm；According to the method described above, pump use is produced
Axial force maximum value measurement mechanism, and tested on universal testing machine, after spring 8 is fully compressed, F2=290N=
2.4F1, meet design requirement；
The device is installed on low specific speed centrifugal pump IS50-32-160, operating half an hour, which waits, takes out, and measures filler
7 are extruded depth 5.5mm.Condiment 7 is recharged, and is tested on universal testing machine, obtains maximum axial force 182N.
Claims (8)
1. a kind of pump axial force maximum value measurement mechanism, it is characterised in that including the first plain thrust bearing, double layer sleeve barrel
（6）, filler（7）, spring（8）, individual layer sleeve（9）With the second plain thrust bearing；The individual layer sleeve（9）One end be fixed on
Second plain thrust bearing B end faces（10-2）On；The individual layer sleeve（9）Insert double layer sleeve barrel（6）；The double layer sleeve barrel（6）
Interior installation spring（8）, embedment filler（7）, spring（8）Both ends respectively with individual layer sleeve（9）End face and double layer sleeve barrel（6）Inner face
It is in contact；The double layer sleeve barrel（6）Outer layer barrel on open up blowdown hole（11）, the double layer sleeve barrel（6）One end be fixed on
First plain thrust bearing B end faces（5-2）On.
A kind of 2. pump axial force maximum value measurement mechanism according to claim 1, it is characterised in that the dumping pit
（11）DiameterD 1, span 3mm-10mm；Adjacent blowdown hole（11）Wheelbasel 3, span 1.5 D 1-5D 1；Most
The blowdown hole of bottom（11）Position should be less than spring（8）Height when being fully compressed.
A kind of 3. pump axial force maximum value measurement mechanism according to claim 1 or 2, it is characterised in that the filler
（7）To have plasticity and filler not soluble in water at normal temperatures.
A kind of 4. pump axial force maximum value measurement mechanism according to claim 3, it is characterised in that the filler（7）
For wax.
A kind of 5. pump axial force maximum value measurement mechanism according to claim 1 or 2, it is characterised in that the individual layer
Sleeve（9）With the double layer sleeve barrel（6）Gap coordinates.
A kind of 6. pump axial force maximum value measurement mechanism according to claim 5, it is characterised in that the individual layer sleeve
（9）Lengthl 1More than the double layer sleeve barrel（6）Lengthl 2。
7. a kind of method that pump axial force maximum value measurement mechanism using described in claim 1 measures, including it is as follows
Step：S1：By the first plain thrust bearing, double layer sleeve barrel（6）, individual layer sleeve（9）Pump is arranged on the second plain thrust bearing
Axle（2）On, impeller nut（4）It is connected through a screw thread and is arranged on pump shaft（2）One end, and impeller nut（4）With the first thrust
Ball bearing A end faces（5-1）Or the second thrust ball bearing A end faces（10-1）Offset
S2：Continuous service pump shaft（2）, a kind of pump axial force maximum value measurement mechanism is then taken out, record filler is squeezed
The depth gone out；Again filler is installed, on universal testing machine, compression spring reads axial force maximum to above-mentioned depth
Value.
8. the method according to claim 7 measured using pump axial force maximum value measurement mechanism, its feature are existed
In the first plain thrust bearing A end faces（5-1）Or the second plain thrust bearing A end faces（10-1）With impeller（3）It is fixedly connected；
The double layer sleeve barrel（6）, the first plain thrust bearing, the second plain thrust bearing and individual layer sleeve（9）With pump shaft（2）It is coaxial
The degree grade of tolerance is controlled in the range of IT6-IT9；With impeller nut（4）The the first plain thrust bearing A end faces to offset（5-1）
Or the second plain thrust bearing A end faces（10-1）With pump shaft（2）For interference fit；With impeller（3）The first plane being fixedly connected
Thrust bearing A end faces（5-1）Or the second plain thrust bearing A end faces（10-1）With pump shaft（2）Coordinate for gap；Described first is flat
Face thrust bearing B end faces（5-2）Or the second plain thrust bearing B end faces（10-2）With pump shaft（2）Gap coordinates.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611015984.6A CN106762708B (en) | 2016-11-18 | 2016-11-18 | A kind of pump axial force maximum value measurement mechanism and measuring method |
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|---|---|---|---|
| CN201611015984.6A CN106762708B (en) | 2016-11-18 | 2016-11-18 | A kind of pump axial force maximum value measurement mechanism and measuring method |
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| Publication Number | Publication Date |
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| CN106762708A CN106762708A (en) | 2017-05-31 |
| CN106762708B true CN106762708B (en) | 2018-04-03 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107965457A (en) * | 2018-01-05 | 2018-04-27 | 米顿罗工业设备（上海）有限公司 | A kind of magnetic force pump axial force maximum and direction measuring device and measuring method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2505810Y (en) * | 2001-05-10 | 2002-08-14 | 大庆油田有限责任公司 | New type screw pump polish rod torque, rotating speed, axial force measuring device |
| WO2012175231A1 (en) * | 2011-06-22 | 2012-12-27 | Ksb Aktiengesellschaft | Detection of leaks in shaft seals |
| JP5937954B2 (en) * | 2012-11-19 | 2016-06-22 | 株式会社神戸製鋼所 | A device for measuring the dynamic characteristics of a centrifugal rotating machine, and a centrifugal rotating machine. |
| CN105092129B (en) * | 2015-07-09 | 2018-07-24 | 广东肯富来泵业股份有限公司 | A kind of axial-force testing device and its test method of rotating machinery |
| CN205404114U (en) * | 2016-03-03 | 2016-07-27 | 沈阳鼓风机集团核电泵业有限公司 | Axial force loading measuring device |
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Application publication date: 20170531 Assignee: Jiangsu Taifeng Pump Co Ltd Assignor: Jiangsu University Contract record no.: 2019320000132 Denomination of invention: Axial force maximum value measuring device for pump and measuring method Granted publication date: 20180403 License type: Common License Record date: 20190510 Application publication date: 20170531 Assignee: Shanghai Liancheng (Group) Co., Ltd. Assignor: Jiangsu University Contract record no.: 2019320000128 Denomination of invention: Axial force maximum value measuring device for pump and measuring method Granted publication date: 20180403 License type: Common License Record date: 20190510 |